83 results on '"Lyra R"'
Search Results
2. A Brazilian multicentre study evaluating pregnancies induced by cabergoline in patients harboring prolactinomas
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Sant’ Anna, B. G., Musolino, N. R. C., Gadelha, M. R., Marques, C., Castro, M., Elias, P. C. L., Vilar, L., Lyra, R., Martins, M. R. A., Quidute, A. R. P., Abucham, J., Nazato, D., Garmes, H. M., Fontana, M. L. C., Boguszewski, C. L., Bueno, C. B., Czepielewski, M. A., Portes, E. S., Nunes-Nogueira, V. S., Ribeiro-Oliveira, Jr., A., Francisco, R. P. V., Bronstein, M. D., and Glezer, A.
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- 2020
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3. 348 The effect of chest compression location on cerebral oxygenation during cardiac arrest in swine
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Gould, Jeffrey R., primary, Lampe, Joshua W., additional, Clark, Lyra R., additional, Harvey, Joshua R., additional, Moodie, Karen L., additional, and Paradis, Norman A., additional
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- 2023
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4. 12-week treadmill exercise program elicits lower energy availability without changes in serum testosterone in male rats
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Clark, Lyra R., Dellogono, Michael J., Chenette, Erin E., Mangano, Kelsey M., and Wilson, Thomas A.
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- 2018
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5. 12-Week Treadmill Program Elicits Low Energy Availability Without Changes in Serum Testosterone in Male Rats: 3436 Board #341 June 2 3: 30 PM - 5: 00 PM
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Clark, Lyra R., Wilson, Thomas, Dellogono, Michael, and Chenette, Erin
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- 2017
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6. ACTN3 genotype influences skeletal muscle mass regulation and response to dexamethasone
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Lucinda Bek, Kelly N. Roeszler, Siaw F. Lee, Peter J. Houweling, Harrison D. Wood, Paul Gregorevic, Jane T. Seto, Lyra R. Meehan, Chrystal F. Tiong, Kathryn N. North, Manan Shah, and Kate G. R. Quinlan
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medicine.medical_specialty ,Duchenne muscular dystrophy ,Population ,Myostatin ,03 medical and health sciences ,0302 clinical medicine ,Atrophy ,Internal medicine ,medicine ,education ,Wasting ,Dexamethasone ,030304 developmental biology ,Denervation ,0303 health sciences ,education.field_of_study ,Multidisciplinary ,biology ,business.industry ,Skeletal muscle ,medicine.disease ,Endocrinology ,medicine.anatomical_structure ,Sarcopenia ,biology.protein ,medicine.symptom ,business ,030217 neurology & neurosurgery ,Glucocorticoid ,medicine.drug - Abstract
Homozygosity for the common ACTN3 null polymorphism (ACTN3 577X) results in α-actinin-3 deficiency in ~20% of humans worldwide and is linked to reduced sprint and power performance in both elite athletes and the general population. α-Actinin-3 deficiency is also associated with reduced muscle mass and strength, increased risk of sarcopenia in the elderly, and altered response to muscle wasting induced by denervation and immobilisation. ACTN3 genotype is also a disease modifier for Duchenne muscular dystrophy (DMD), with α-actinin-3 deficiency associated with slower disease progression. Here we show that α-actinin-3 plays a key role in the regulation of protein synthesis and breakdown signalling in skeletal muscle, and its influence on muscle mass begins during early postnatal muscle development. Actn3 genotype also influences the skeletal muscle response to the glucocorticoid dexamethasone. Following acute dexamethasone exposure, transcriptomic analyses by RT-qPCR and RNA-sequencing show reduced atrophy signalling (Mstn, Tmem100, mRas, Fbxo32, Trim63) and anti-inflammatory response in α-actinin-3 deficient mice compared to wild-type. α-Actinin-3 deficiency also protects against muscle wasting following prolonged daily treatment with dexamethasone in female, but not male mice. In combination, these data suggest that ACTN3 R577X is a pharmacogenetic variant influencing the anti-inflammatory and muscle wasting response to glucocorticoid therapy.
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- 2021
7. Consumption of Two Eggs Daily Increases Serum Leptin in Amenorrheic Runners With Low Energy Availability Without Changes in Lipid Profile
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Lyra R. Clark, Michael Dellogono, and Thomas A. Wilson
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Nutrition and Dietetics ,medicine.diagnostic_test ,Diet therapy ,Leptin ,Medicine (miscellaneous) ,VO2 max ,Biology ,Animal science ,Low energy ,Serum leptin ,medicine ,Lipid profile ,Dietary Cholesterol ,Food Science ,Hormone ,Sports Nutrition and Physical Activity - Abstract
OBJECTIVES: The primary aim of this study was to investigate the effects of increased dietary cholesterol intake through the consumption of eggs on ovarian sex hormone and leptin levels in amenorrheic female distance athletes. METHODS: Division I female distance runners classified as amenorrheic (AMEN, n = 5) or eumenorrheic (EUMEN, n = 5) via self-report questionnaire participated in this study. Participants consumed two eggs per day for 12 weeks over the course of the outdoor track and field season. EA was calculated at baseline and post-intervention using 3-day dietary records, triaxial accelerometers, and heart rate (HR) monitors. Maximal oxygen uptake (VO2max) was measured to calculate exercise energy expenditure with training HR data. Serum hormones, body composition, and blood lipids were measured at baseline and post-intervention. RESULTS: There were no differences exhibited by AMEN and EUMEN groups in body composition, EA, or sex hormones after the dietary intervention. Serum leptin increased in the AMEN group by 70% (P = 0.02) from baseline following egg consumption, while no change in serum leptin was observed in the EUMEN group. EA was calculated to be below 30 kcal·kg(−1)·FFM·d(−1) in both groups following intervention. No changes in serum lipids and lipoprotein cholesterol levels were observed in AMEN or EUMEN due to egg consumption. CONCLUSIONS: Twelve-week consumption of two eggs per day increased serum leptin in amenorrheic athletes with low EA with no changes in ovarian sex hormones. The serum lipid profile was not adversely affected by increased dietary cholesterol in the form of eggs. FUNDING SOURCES: Egg Nutrition Center Graduate Fellowship Research Grant.
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- 2021
8. ACTN3 genotype influences skeletal muscle mass regulation and response to dexamethasone
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Seto, Jane T., primary, Roeszler, Kelly N., additional, Meehan, Lyra R., additional, Wood, Harrison D., additional, Tiong, Chrystal, additional, Bek, Lucinda, additional, Lee, Siaw F., additional, Shah, Manan, additional, Quinlan, Kate G. R., additional, Gregorevic, Paul, additional, Houweling, Peter J., additional, and North, Kathryn N., additional
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- 2021
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9. The Effect of ACTN3 Gene Doping on Skeletal Muscle Performance
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Chrystal F. Tiong, Nan Yang, Stewart I. Head, Peter J. Houweling, Lyra R. Meehan, Marshall W. Hogarth, Fleur C. Garton, Paul Gregorevic, Stephen Leslie, Jane T. Seto, Fiona Lee, Damjan Vukcevic, Kathryn N. North, Diana Zannino, Kelly N. Roeszler, and Monkol Lek
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0301 basic medicine ,Gene isoform ,Heterozygote ,medicine.medical_specialty ,Muscle Fibers, Skeletal ,Down-Regulation ,Actinin ,030105 genetics & heredity ,Biology ,Gene dosage ,Article ,03 medical and health sciences ,Gene doping ,Internal medicine ,Genetics ,medicine ,Animals ,Humans ,Anaerobiosis ,Allele ,Muscle, Skeletal ,Genetics (clinical) ,Muscle fatigue ,Calcineurin ,Homozygote ,Skeletal muscle ,Organ Size ,Dependovirus ,Mice, Inbred C57BL ,030104 developmental biology ,Endocrinology ,medicine.anatomical_structure ,Animals, Newborn ,Athletes ,Muscle Fatigue ,Knockout mouse ,Oxidation-Reduction ,Genome-Wide Association Study - Abstract
Loss of expression of ACTN3, due to homozygosity of the common null polymorphism (p.Arg577X), is underrepresented in elite sprint/power athletes and has been associated with reduced muscle mass and strength in humans and mice. To investigate ACTN3 gene dosage in performance and whether expression could enhance muscle force, we performed meta-analysis and expression studies. Our general meta-analysis using a Bayesian random effects model in elite sprint/power athlete cohorts demonstrated a consistent homozygous-group effect across studies (per allele OR = 1.4, 95% CI 1.3-1.6) but substantial heterogeneity in heterozygotes. In mouse muscle, rAAV-mediated gene transfer overexpressed and rescued α-actinin-3 expression. Contrary to expectation, in vivo "doping" of ACTN3 at low to moderate doses demonstrated an absence of any change in function. At high doses, ACTN3 is toxic and detrimental to force generation, to demonstrate gene doping with supposedly performance-enhancing isoforms of sarcomeric proteins can be detrimental for muscle function. Restoration of α-actinin-3 did not enhance muscle mass but highlighted the primary role of α-actinin-3 in modulating muscle metabolism with altered fatiguability. This is the first study to express a Z-disk protein in healthy skeletal muscle and measure the in vivo effect. The sensitive balance of the sarcomeric proteins and muscle function has relevant implications in areas of gene doping in performance and therapy for neuromuscular disease.
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- 2018
10. 12-week treadmill exercise program elicits lower energy availability without changes in serum testosterone in male rats
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Kelsey M. Mangano, Michael Dellogono, Thomas A. Wilson, Lyra R. Clark, and Erin E. Chenette
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Serum testosterone ,medicine.medical_specialty ,business.industry ,Leptin ,030209 endocrinology & metabolism ,030229 sport sciences ,Lower energy ,03 medical and health sciences ,0302 clinical medicine ,Endocrinology ,Endurance training ,Internal medicine ,Male rats ,medicine ,Orthopedics and Sports Medicine ,Treadmill ,business ,Testosterone ,Hormone - Abstract
The purpose of this study was to investigate whether a treadmill endurance exercise program would reduce serum testosterone and leptin in male rats and assess the impact of increased dietary cholesterol on serum hormones. Male Sprague-Dawley Rats (n = 20) were randomly assigned to a control group (C) or an exercise training group (EX) that performed treadmill running 40 min/day, 6 days/week for 12 weeks. At study midpoint (week 6), rats were randomized to a high-cholesterol (HC) diet (n = 10) or remain on standard semi-purified (LC) diet (n = 10). Results are presented as median [IQR]. At end of week 6, EX + LC had significantly lower body weight (508 [460–527] vs 570 [516–606] g; p = 0.01), mean daily energy intake (76.3 [74.9–82.2] vs 90.9 [86.9–94.5] kcal; p
- Published
- 2018
11. The convective boundary layer over pasture and forest in Amazonia
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Fisch, G., Tota, J., Machado, L. A. T., Silva Dias, M. A. F., da F. Lyra, R. F., Nobre, C. A., Dolman, A. J., and Gash, J. H. C.
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- 2004
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12. Abstract 458: Pause Duration During Manual CPR is Associated With Survival and Favorable Neurological Outcome in All-Rhythm OHCA
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Margaret Mullins, Robyn McDannold, Lyra R Clark, and Bentley J. Bobrow
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medicine.medical_specialty ,Rhythm ,Duration (music) ,Adverse outcomes ,business.industry ,Physiology (medical) ,Emergency medicine ,medicine ,Cognition ,Limiting ,Cardiology and Cardiovascular Medicine ,business ,Outcome (game theory) - Abstract
Introduction: AHA guidelines emphasize the importance of limiting pauses during CPR to less than 10 seconds due to the association of interruptions in chest compressions (CC) with adverse outcomes. Previous literature has associated shorter peri-shock pause times with greater odds of survival and longest pause in CC with lower odds of survival, though these analyses were restricted to patients with initial shockable rhythm. The aim of this analysis is to investigate the association between CC pause duration and patient outcomes in all-rhythm OHCA. Methods: OHCA cases from three EMS Agencies in Arizona between Jan 2016-Dec 2016 (n=229) were analyzed. De-identified prehospital patient data were linked to outcome data as part of the state quality program. Pauses calculated from CPR pad accelerometer data were defined by a minimum duration of 1000 ms. Mean pause duration was calculated by case as the average of all pauses, while longest pause duration was defined as the single longest pause in CC. Descriptive statistics and multivariate logistic regression was performed in STATA 15.1. Primary outcome measures defined were ROSC, survival-to-discharge, and favorable neurological outcome (Cerebral Performance Category 1 or 2). Covariates included in the statistical model include time in CPR, age, witnessed arrest, initial shockable rhythm, bystander CPR, and CPR quality. Results: A total of 37.1% of patients (n=85) achieved prehospital ROSC, 12.7% (n=29) survived, and 10.5% (n=24) had favorable neurological outcome. Average mean and longest pause duration was 8.13 + 0.76 s and 24.93 + 2.84 in survivors with favorable neurological outcome compared to 9.21 + 0.47 s and 35.56 + 3.55 s in non-survivors. Mean pause duration was associated with survival (adjusted OR 0.89, 95% CI 0.80-0.99) and favorable neurological outcome (adjusted OR 0.83, 95% CI 0.72-0.97). Longest pause duration was associated with favorable neurological outcome (adjusted OR 0.97, 95% CI 0.94-1.00). Conclusions: Prolonged pauses in CC during prehospital resuscitation was associated with worse survival and neurological function in OHCA patients with all cardiac rhythms. Pause duration should be kept as brief as possible due to the impact upon outcomes regardless of presenting cardiac rhythm.
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- 2019
13. LATE BREAKING NEWS E-POSTER PRESENTATION
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Kathryn N. North, Jane T. Seto, Lyra R. Meehan, Harrison Wood, Chrystal F. Tiong, Kelly N. Roeszler, Cheryl Lee, Peter J. Houweling, Paul Gregorevic, and Lucinda Bek
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Presentation ,History ,Neurology ,media_common.quotation_subject ,Pediatrics, Perinatology and Child Health ,Neurology (clinical) ,Genetics (clinical) ,Visual arts ,media_common - Published
- 2020
14. Abstract 458: Pause Duration During Manual CPR is Associated With Survival and Favorable Neurological Outcome in All-Rhythm OHCA
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Clark, Lyra R, primary, McDannold, Robyn, additional, Mullins, Margaret, additional, and Bobrow, Bentley, additional
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- 2019
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15. A Brazilian multicentre study evaluating pregnancies induced by cabergoline in patients harboring prolactinomas
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Sant’ Anna, B. G., primary, Musolino, N. R. C., additional, Gadelha, M. R., additional, Marques, C., additional, Castro, M., additional, Elias, P. C. L., additional, Vilar, L., additional, Lyra, R., additional, Martins, M. R. A., additional, Quidute, A. R. P., additional, Abucham, J., additional, Nazato, D., additional, Garmes, H. M., additional, Fontana, M. L. C., additional, Boguszewski, C. L., additional, Bueno, C. B., additional, Czepielewski, M. A., additional, Portes, E. S., additional, Nunes-Nogueira, V. S., additional, Ribeiro-Oliveira, A., additional, Francisco, R. P. V., additional, Bronstein, M. D., additional, and Glezer, A., additional
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- 2019
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16. Gods associated with male fertility and virility
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Neto, F. T. L., primary, Bach, P. V., additional, Lyra, R. J. L., additional, Borges Junior, J. C., additional, Maia, G. T. d. S., additional, Araujo, L. C. N., additional, and Lima, S. V. C., additional
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- 2019
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17. A Brazilian multicentre study evaluating pregnancies induced by cabergoline in patients harboring prolactinomas.
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Sant' Anna, B. G., Musolino, N. R. C., Gadelha, M. R., Marques, C., Castro, M., Elias, P. C. L., Vilar, L., Lyra, R., Martins, M. R. A., Quidute, A. R. P., Abucham, J., Nazato, D., Garmes, H. M., Fontana, M. L. C., Boguszewski, C. L., Bueno, C. B., Czepielewski, M. A., Portes, E. S., Nunes-Nogueira, V. S., and Ribeiro-Oliveira, A.
- Abstract
Objective: To evaluate the maternal–fetal outcomes of CAB-induced pregnancies in patients with prolactinoma in a large cohort. Methods: The prevalence of tumor growth, miscarriage, preterm, low birth weight, congenital malformations and impairment in neuropsychological development in children among women treated with CAB were assessed in a Brazilian multicentre retrospective observational study, Results: We included 194 women with a mean age of 31 (17–45) years, 43.6% presenting microadenomas and 56.4% macroadenomas, at prolactinoma diagnosis. In 233 pregnancies, CAB was withdrawn in 89%, after pregnancy confirmation. Symptoms related to tumor growth occurred in 25 cases, more frequently in macroadenomas. The overall miscarriage rate was 11%, although higher in the subgroup of patients with CAB maintainance after pregnancy confirmation (38% vs. 7.5%). Amongst the live-birth deliveries, preterm occurred in 12%, low birth weight in 6% and congenital malformations in 4.3%. Neuropsychological development impairment was reported in 7% of cases. Conclusions: Our findings confirm previous results of safety in maternal and fetal outcomes in CAB-induced pregnancies; nevertheless, CAB maintenance after pregnancy confirmation was associated with higher miscarriage rate; result that must be further confirmed. [ABSTRACT FROM AUTHOR]
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- 2020
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18. Endoscopic laser lithotripsy for seminal vesicle calculi
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Tenorio Lira Neto, F., primary, Borges Cabral Junior, J., additional, Correia, M.P., additional, Prado Lyra, R., additional, and LisboaLyra, R.J., additional
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- 2018
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19. Influence of Auxiliary Teeth on Performance of a Permanent Magnet Linear Motor
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Boduroglu, A., primary, Demir, Y., additional, Lyra, R., additional, and Aydin, M., additional
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- 2018
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20. 074 Tadalafil 5mg on Alternate Days for Treatment of Erectile Dysfunction
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Moraes Veloso da Silveira, E., primary, Silva Peixoto de Carvalho, B., additional, Borges Cabral Junior, J., additional, Falcao do Nascimento, E., additional, Dubourcq de Barros, F., additional, José Lisboa Lyra, R., additional, Cavalcanti Wanderley, G., additional, Amorim Moura Filho, S., additional, Lobo Fernandes Vieira, L., additional, and Tenorio Lira Neto, F., additional
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- 2018
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21. Measuring the performance of Science and Technology Parks: a proposal of a multidimensional model
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Lyra, R M, primary and Almeida, M F L, additional
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- 2018
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22. The Effect of ACTN3 Gene Doping on Skeletal Muscle Performance
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Garton, Fleur C., primary, Houweling, Peter J., additional, Vukcevic, Damjan, additional, Meehan, Lyra R., additional, Lee, Fiona X.Z., additional, Lek, Monkol, additional, Roeszler, Kelly N., additional, Hogarth, Marshall W., additional, Tiong, Chrystal F., additional, Zannino, Diana, additional, Yang, Nan, additional, Leslie, Stephen, additional, Gregorevic, Paul, additional, Head, Stewart I., additional, Seto, Jane T., additional, and North, Kathryn N., additional
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- 2018
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23. 12-Week Treadmill Program Elicits Low Energy Availability Without Changes in Serum Testosterone in Male Rats
- Author
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Michael Dellogono, Lyra R. Clark, Thomas A. Wilson, and Erin E. Chenette
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Serum testosterone ,medicine.medical_specialty ,Low energy ,Endocrinology ,business.industry ,Internal medicine ,Male rats ,medicine ,Physical Therapy, Sports Therapy and Rehabilitation ,Orthopedics and Sports Medicine ,Treadmill ,business - Published
- 2017
24. The Modified Ferriman-Gallwey Score and Hirsutism among Filipino Women
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Ma. Karen Celine C. Ilagan, Elizabeth Paz-Pacheco, Darwin Z. Totesora, Lyra Ruth Clemente-Chua, and Jundelle Romulo K. Jalique
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hirsutism ,gonadal disorders ,polycystic ovary syndrome ,hyperandrogenism ,Diseases of the endocrine glands. Clinical endocrinology ,RC648-665 - Abstract
BackgroundThe modified Ferriman-Gallwey (mFG) score is the gold standard for the clinical evaluation of hirsutism. However, racial variations in terminal hair growth limit this tool. This study aimed to determine the mFG cut-off score among Filipino women and its association with biochemical hyperandrogenism.MethodsA total of 128 Filipino women were included in this prospective cross-sectional study and were divided into two groups: a polycystic ovary syndrome (PCOS) group (n=28) and a non-PCOS group (n=100). The participants underwent mFG score determination, ovarian ultrasound conducted by a single sonographer, and hormone testing. The mFG cut-off score was determined based on the 95th percentile of the non-PCOS group. Logistic regression was used to analyze the relationship between mFG score and biochemical hyperandrogenism.ResultsAlthough the mFG score was generally low in both the PCOS and non-PCOS groups, the former exhibited a higher mean score than the latter (4.3±3.0 vs. 2.0±2.2, P
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- 2019
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25. Observations of the atmospheric boundary layer in Rondonia
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Nobre, Carlos Afonso, Fisch, Giberto, Rocha, H. R., Lyra, R. F. da F., Rocha, E. P. da, Costa, A. C. L. da, Ubarana, V. N., Nobre, Carlos Afonso, Fisch, Giberto, Rocha, H. R., Lyra, R. F. da F., Rocha, E. P. da, Costa, A. C. L. da, and Ubarana, V. N.
- Abstract
Observações do desenvolvimento de camadas limites atmosféricas sobre regiões de floresta tropical e pastagem são apresentadas. Estas medidas foram obtidas no Experimento da Camada Limite de Rondônia -Fase lI, realizado na região de Ji- Paraná (sudoeste da Amazônia), durante o mês de julho de 1993. O conjunto de dados consiste em perfis atmosféricos medidos a partir de balão cativo, radiossondagem e de medidas de fluxos turbulentos à superfície. Os resultados mostram que a camada limite convectiva desenvolvida sobre a área de pastagem pode atingir alturas de até 2.200 m ao final da tarde, valores estes superiores aos observados sobre a floresta (1.250 m). A camada limite estável noturna é mais profunda sobre a floresta (385 m) do que sobre a pastagem (240 m). Os mecanismos atmosféricos que determinam estas características são discutidos., Pages: 413-424
- Published
- 1996
26. Diurnal cycle of temperature and wind fluctuations within an African equatorial rain forest
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Bouka Biona, C., primary, Druilhet, A., additional, Benech, B., additional, and Lyra, R., additional
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- 2001
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27. Dynamics above a dense equatorial rain forest from the surface boundary layer to the free atmosphere
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Lyra, R., primary, Druilhet, A., additional, Benech, B., additional, and Biona, C. Bouka, additional
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- 1992
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28. Update on glycated hemoglobin (HbA 1c) for assessment ofglycemk control and the diagnosis of diabetes: Clinical and laboratory aspects,Atualização sobre hemoglobina glicada (HbA 1c) para avalia̧ão do controle glicêmico e para o diagnóstico do diabetes: Aspectos clínicos e laboratoriais
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Netto, A. P., Andriolo, A., Filho, F. F., Tambascia, M., Gomes, M. D. B., Murilo Melo, Sumita, N. M., Lyra, R., and Cavalcanti, S.
29. A fast series compensator for voltage sag correction
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Rocha Silva, S., primary, Fernandes Moreira, A., additional, and de Oliveira da Costa Lyra, R., additional
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30. A fast series compensator for voltage sag correction.
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Rocha Silva, S., Fernandes Moreira, A., and de Oliveira da Costa Lyra, R.
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- 1997
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31. Rare genetic variants of NLRP12 in Admixed Latino-American Children with SARS-CoV-2-related Multisystem Inflammatory Syndrome.
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Barreto TMM, Souza RS, São Pedro RB, Paiva IM, Silva AS, Nogueira AL, Bellinat APN, Dias NLS, Nunes S, Britto GSG, Amaral EHB, Rocha GD, Silva-Carvalho C, Lyra R, Kehdy FSG, Campos TL, Moura PMMF, Tarazona-Santos E, Cunha TM, Tavares NM, Oliveira-Sá MVB, Ramos RCF, Carmo RF, Vasconcelos LRS, and Oliveira PRS
- Abstract
Multisystem Inflammatory Syndrome in Children (MIS-C) is a rare, potentially fatal complication of SARS-CoV-2 infection. Genetic defects in inflammation-related pathways have been linked to MIS-C, but additional research is needed, especially in diverse ethnic groups. The present study aimed to identify genetic variants underlying MIS-C in Brazilian patients. Whole-exome sequencing was performed, focusing on genes involved in the host immune response to SARS-CoV-2. Functional assays assessed the impact of selected variants on NF-κB signaling. Nine rare, potentially deleterious variants were found in eight of 21 patients, located in IL17RC, IFNA10, or NLRP12 genes. Unlike the wild-type NLRP12 protein, which inhibits NF-κB activation in HEK 293T cells, the mutant NLRP12 proteins have significantly reduced inhibitory properties. In conclusion, our results indicate that rare autosomal variants in immune-related genes may underlie MIS-C, highlighting the potential role of NLRP12 in its predisposition. These findings provide new insights for the appropriate management of MIS-C., (© The Author(s) 2024. Published by Oxford University Press on behalf of Infectious Diseases Society of America. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.)
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- 2024
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32. Usefulness of prolactin levels in predicting the etiology of hyperprolactinemia in a cohort of 770 patients.
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Vilar L, Vilar CF, Lyra R, Albuquerque L, Garrido ACT, Gadelha PS, Diniz ET, Almeida M, Cordeiro LH, de Carvalho EH, de Melo ATB, Medeiros KM, Ferreira GRA, Mororó JC, Ximenes DZ, Madruga CRC, Nunes RO, de Sá YQP, and Naves LA
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- Humans, Female, Male, Middle Aged, Retrospective Studies, Adult, Adolescent, Aged, Child, Young Adult, Brazil, Biomarkers blood, Predictive Value of Tests, Hyperprolactinemia blood, Hyperprolactinemia etiology, Prolactin blood, Prolactinoma blood, Prolactinoma complications, Pituitary Neoplasms blood, Pituitary Neoplasms complications
- Abstract
Objective: Determining the etiology of hyperprolactinemia is fundamental for selecting the most appropriate treatment strategy. The aim of this study was to evaluate the usefulness and accuracy of prolactin levels in predicting the etiology of nonphysiological hyperprolactinemia., Subjects and Methods: In this retrospective study, we reviewed medical records of patients with nonphysiological hyperprolactinemia seen at two neuroendocrine reference centers located in Recife, Brazil, from January 2000 to December 2019., Results: The study included 770 patients aged 12-73 years (65% female). The three most frequent etiologies of hyperprolactinemia were prolactinomas (n = 263; 34.2%), drug-induced hyperprolactinemia (n = 160; 20.8%), and macroprolactinemia (n = 120; 15.6%). The highest mean prolactin levels were observed in cases of prolactinomas and idiopathic hyperprolactinemia. Most patients with hyperprolactinemia due to other etiologies had prolactin levels < 100 ng/mL, but these levels were also found in 16.5% of patients with microproplactinomas and in 20% of those with idiopathic hyperprolactinemia. Likewise, prolactin levels largely overlapped among patients with microprolactinomas, macroprolactinemia, and drug-induced hyperprolactinemia. Notably, prolactin levels > 250 ng/mL enabled a clear distinction between the etiologies of macroprolactinoma and nonfunctioning pituitary adenoma. Moreover, prolactin levels > 500 ng/mL were highly suggestive of macroprolactinomas, although they were also found in very few patients (<2%) with microprolactinomas or drug-induced hyperprolactinemia., Conclusion: Despite considerable overlap in prolactin levels among the different etiologies of hyperprolactinemia, values > 250 ng/mL allowed a clear distinction between macroprolactinomas and nonfunctioning pituitary adenomas. Furthermore, prolactin levels > 500 ng/mL were almost exclusively found in patients with prolactinomas., Competing Interests: Disclosure: no potential conflict of interest relevant to this article was reported.
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- 2024
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33. 2023 UPDATE: Luso-Brazilian evidence-based guideline for the management of antidiabetic therapy in type 2 diabetes.
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Bertoluci MC, Silva Júnior WS, Valente F, Araujo LR, Lyra R, de Castro JJ, Raposo JF, Miranda PAC, Boguszewski CL, Hohl A, Duarte R, Salles JEN, Silva-Nunes J, Dores J, Melo M, de Sá JR, Neves JS, Moreira RO, Malachias MVB, Lamounier RN, Malerbi DA, Calliari LE, Cardoso LM, Carvalho MR, Ferreira HJ, Nortadas R, Trujilho FR, Leitão CB, Simões JAR, Dos Reis MIN, Melo P, Marcelino M, and Carvalho D
- Abstract
Background: The management of antidiabetic therapy in people with type 2 diabetes (T2D) has evolved beyond glycemic control. In this context, Brazil and Portugal defined a joint panel of four leading diabetes societies to update the guideline published in 2020., Methods: The panelists searched MEDLINE (via PubMed) for the best evidence from clinical studies on treating T2D and its cardiorenal complications. The panel searched for evidence on antidiabetic therapy in people with T2D without cardiorenal disease and in patients with T2D and atherosclerotic cardiovascular disease (ASCVD), heart failure (HF), or diabetic kidney disease (DKD). The degree of recommendation and the level of evidence were determined using predefined criteria., Results and Conclusions: All people with T2D need to have their cardiovascular (CV) risk status stratified and HbA1c, BMI, and eGFR assessed before defining therapy. An HbA1c target of less than 7% is adequate for most adults, and a more flexible target (up to 8%) should be considered in frail older people. Non-pharmacological approaches are recommended during all phases of treatment. In treatment naïve T2D individuals without cardiorenal complications, metformin is the agent of choice when HbA1c is 7.5% or below. When HbA1c is above 7.5% to 9%, starting with dual therapy is recommended, and triple therapy may be considered. When HbA1c is above 9%, starting with dual therapyt is recommended, and triple therapy should be considered. Antidiabetic drugs with proven CV benefit (AD1) are recommended to reduce CV events if the patient is at high or very high CV risk, and antidiabetic agents with proven efficacy in weight reduction should be considered when obesity is present. If HbA1c remains above target, intensification is recommended with triple, quadruple therapy, or even insulin-based therapy. In people with T2D and established ASCVD, AD1 agents (SGLT2 inhibitors or GLP-1 RA with proven CV benefit) are initially recommended to reduce CV outcomes, and metformin or a second AD1 may be necessary to improve glycemic control if HbA1c is above the target. In T2D with HF, SGLT2 inhibitors are recommended to reduce HF hospitalizations and mortality and to improve HbA1c. In patients with DKD, SGLT2 inhibitors in combination with metformin are recommended when eGFR is above 30 mL/min/1.73 m
2 . SGLT2 inhibitors can be continued until end-stage kidney disease., (© 2023. The Author(s).)- Published
- 2023
- Full Text
- View/download PDF
34. Admixture/fine-mapping in Brazilians reveals a West African associated potential regulatory variant (rs114066381) with a strong female-specific effect on body mass and fat mass indexes.
- Author
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Scliar MO, Sant'Anna HP, Santolalla ML, Leal TP, Araújo NM, Alvim I, Borda V, Magalhães WCS, Gouveia MH, Lyra R, Machado M, Michelin L, Rodrigues MR, Araújo GS, Kehdy FSG, Zolini C, Peixoto SV, Luizon MR, Lobo F, Naslavsky MS, Yamamoto GL, Duarte YAO, Hansen MEB, Norris SA, Gilman RH, Guio H, Hsing AW, Mbulaiteye SM, Mensah J, Dutil J, Yeager M, Yeboah E, Tishkoff SA, Choudhury A, Ramsay M, Passos-Bueno MR, Zatz M, O Connor TD, Pereira AC, Barreto ML, Lima-Costa MF, Horta BL, and Tarazona-Santos E
- Subjects
- Aged, Aged, 80 and over, Alleles, Brazil, Child, Child, Preschool, Chromosome Mapping, Female, Humans, Male, Middle Aged, Phenotype, Regulatory Sequences, Nucleic Acid, Sex Factors, Young Adult, Body Mass Index, Genetics, Population, Polymorphism, Single Nucleotide
- Abstract
Background/objectives: Admixed populations are a resource to study the global genetic architecture of complex phenotypes, which is critical, considering that non-European populations are severely underrepresented in genomic studies. Here, we study the genetic architecture of BMI in children, young adults, and elderly individuals from the admixed population of Brazil., Subjects/methods: Leveraging admixture in Brazilians, whose chromosomes are mosaics of fragments of Native American, European, and African origins, we used genome-wide data to perform admixture mapping/fine-mapping of body mass index (BMI) in three Brazilian population-based cohorts from Northeast (Salvador), Southeast (Bambuí), and South (Pelotas)., Results: We found significant associations with African-associated alleles in children from Salvador (PALD1 and ZMIZ1 genes), and in young adults from Pelotas (NOD2 and MTUS2 genes). More importantly, in Pelotas, rs114066381, mapped in a potential regulatory region, is significantly associated only in females (p = 2.76e-06). This variant is rare in Europeans but with frequencies of ~3% in West Africa and has a strong female-specific effect (95% CI: 2.32-5.65 kg/m
2 per each A allele). We confirmed this sex-specific association and replicated its strong effect for an adjusted fat mass index in the same Pelotas cohort, and for BMI in another Brazilian cohort from São Paulo (Southeast Brazil). A meta-analysis confirmed the significant association. Remarkably, we observed that while the frequency of rs114066381-A allele ranges from 0.8 to 2.1% in the studied populations, it attains ~9% among women with morbid obesity from Pelotas, São Paulo, and Bambuí. The effect size of rs114066381 is at least five times higher than the FTO SNPs rs9939609 and rs1558902, already emblematic for their high effects., Conclusions: We identified six candidate SNPs associated with BMI. rs114066381 stands out for its high effect that was replicated and its high frequency in women with morbid obesity. We demonstrate how admixed populations are a source of new relevant phenotype-associated genetic variants.- Published
- 2021
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- View/download PDF
35. Pitfalls in the Diagnostic Evaluation of Hyperprolactinemia.
- Author
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Vilar L, Vilar CF, Lyra R, and Freitas MDC
- Subjects
- Female, Humans, Hyperprolactinemia etiology, Male, Hyperprolactinemia diagnosis
- Abstract
An appropriate diagnostic evaluation is essential for the most appropriate treatment to be performed. Currently, macroprolactinemia is the third most frequent cause of nonphysiological hyperprolactinemia after drugs and prolactinomas. Up to 40% of macroprolactinemic patients may present with hypogonadism symptoms, infertility, and/or galactorrhea. Thus, the screening for macroprolactin is indicated not only for asymptomatic subjects but also for those without an obvious cause for their prolactin (PRL) elevation. Before submitting patients to macroprolactin screening and pituitary magnetic resonance imaging, one should rule out pregnancy, drug-induced hyperprolactinemia, primary hypothyroidism, and renal failure. The magnitude of PRL elevation can be useful in determining the etiology of hyperprolactinemia. PRL values >250 ng/mL are highly suggestive of prolactinomas and virtually exclude nonfunctioning pituitary adenomas (NFPAs) and other sellar masses as the etiology of hyperprolactinemia. However, they can also be found in subjects with macroprolactinemia, drug-induced hyper-prolactinemia or chronic renal failure. By contrast, most patients with NFPAs, drug-induced hyperprolactinemia, macroprolactinemia, or systemic diseases present with PRL levels <100 ng/mL. However, exceptions to these rules are not rare. Indeed, up to 25% of patients harboring a microprolactinoma or a cystic macroprolactinoma may also have PRL <100 ng/mL. Falsely low PRL levels may result from the so-called "hook effect," which should be considered in all cases of large (≥3 cm) pituitary adenomas associated with normal or mildly elevated PRL levels (≤250 ng/mL). The hook effect may be unmasked by repeating PRL measurement after a 1:100 serum sample dilution., (© 2019 S. Karger AG, Basel.)
- Published
- 2019
- Full Text
- View/download PDF
36. Acromegaly: clinical features at diagnosis.
- Author
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Vilar L, Vilar CF, Lyra R, Lyra R, and Naves LA
- Subjects
- Acromegaly pathology, Female, Gigantism diagnosis, Gigantism pathology, Humans, Male, Acromegaly diagnosis
- Abstract
Background: Acromegaly is a rare and underdiagnosed disorder caused, in more than 95% of cases, by a growth hormone (GH)-secreting pituitary adenoma. The GH hypersecretion leads to overproduction of insulin-like growth factor 1 (IGF-1) which results in a multisystem disease characterized by somatic overgrowth, multiple comorbidities, physical disfigurement, and increased mortality., Objective: This article aims to review the clinical features of acromegaly at diagnosis., Discussion/conclusion: Acromegaly affects both males and females equally and the average age at diagnosis ranges from 40 to 50 years (up to 5% of cases < the age 20). Due to insidious onset and slow progression, acromegaly is often diagnosed five to more than ten years after its onset. The typical coarsening of facial features include furrowing of fronthead, pronounced brow protrusion, enlargement of the nose and the ears, thickening of the lips, skin wrinkles and nasolabial folds, as well as mandibular prognathism that leads to dental malocclusion and increased interdental spacing. Excessive growth of hands and feet (predominantly due to soft tissue swelling) is present in the vast majority of acromegalic patients. Gigantism accounts for up to 5% of cases and occurs when the excess of GH becomes manifest in the young, before the epiphyseal fusion. The disease also has rheumatologic, cardiovascular, respiratory, neoplastic, neurological, and metabolic manifestations which negatively impact its prognosis and patients quality of life. Less than 15% of acromegalic patients actively seek medical attention for change in appearance or enlargement of the extremities. The presentation of acromegaly is more often related to its systemic comorbidities or to local tumor effects.
- Published
- 2017
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- View/download PDF
37. The Role of Isotretinoin Therapy for Cushing's Disease: Results of a Prospective Study.
- Author
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Vilar L, Albuquerque JL, Lyra R, Trovão Diniz E, Rangel Filho F, Gadelha P, Thé AC, Ibiapina GR, Gomes BS, Santos V, Melo da Fonseca M, Frasão Viana K, Lopes IG, Araújo D, and Naves L
- Abstract
Objective. This prospective open trial aimed to evaluate the efficacy and safety of isotretinoin (13-cis-retinoic acid) in patients with Cushing's disease (CD). Methods. Sixteen patients with CD and persistent or recurrent hypercortisolism after transsphenoidal surgery were given isotretinoin orally for 6-12 months. The drug was started on 20 mg daily and the dosage was increased up to 80 mg daily if needed and tolerated. Clinical, biochemical, and hormonal parameters were evaluated at baseline and monthly for 6-12 months. Results. Of the 16 subjects, 4% (25%) persisted with normal urinary free cortisol (UFC) levels at the end of the study. UFC reductions of up to 52.1% were found in the rest. Only patients with UFC levels below 2.5-fold of the upper limit of normal achieved sustained UFC normalization. Improvements of clinical and biochemical parameters were also noted mostly in responsive patients. Typical isotretinoin side-effects were experienced by 7 patients (43.7%), though they were mild and mostly transient. We also observed that the combination of isotretinoin with cabergoline, in relatively low doses, may occasionally be more effective than either drug alone. Conclusions. Isotretinoin may be an effective and safe therapy for some CD patients, particularly those with mild hypercortisolism.
- Published
- 2016
- Full Text
- View/download PDF
38. Second Attempt of Cabergoline Withdrawal in Patients with Prolactinomas after a Failed First Attempt: Is it Worthwhile?
- Author
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Vilar L, Albuquerque JL, Gadelha PS, Rangel Filho F, Siqueira AM, da Fonseca MM, Viana KF, Gomes BS, and Lyra R
- Abstract
Successful discontinuation of cabergoline (CAB) treatment has been reported in 31-75% of prolactinomas patients treated for at least 2 years. In contrast, it is not well established whether CAB therapy can be successfully withdrawn after a failed first attempt. This prospective open trial was designed to address this topic and to try to identify possible predictor factors. Among 180 patients with prolactinomas on CAB therapy, the authors selected those who fulfilled very strict criteria, particularly additional CAB therapy for at least 2 years, normalization of serum prolactin (PRL) levels following CAB restart, no tumor remnant >10 mm, no previous pituitary radiotherapy or surgery; and current CAB dose ≤1.0 mg/week. Recurrence was defined as an increase of PRL levels above the upper limit of normal. A total of 34 patients (70.6% female) treated with CAB for 24-30 months were recruited. Ten patients (29.4%) remained without evidence of recurrence after 24-26 months of follow-up. Twenty-four patients (70.6%) recurred within 15 months (75% within 12 months) after drug withdrawal and ~80% were restarted CAB. Median time to recurrence was 10.5 months (range, 3-15). Despite overlapping values, non-recurring patients had significantly lower mean PRL levels before withdrawal. Moreover, the recurrence rate was lower in subjects without visible tumor on pituitary magnetic resonance imaging (MRI) than in those with small remnant tumor (60 vs. 79%), though the difference was not statistically significant (P = 0.20). No other characteristic could be identified as a predictor of successful CAB discontinuation. In conclusion, a second attempt of CAB withdrawal after two additional years of therapy may be successful, particularly in patients with lower PRL levels and no visible tumor on pituitary MRI. Close monitoring of PRL level is mandatory, especially within the first year after withdrawal, where most recurrences are detected.
- Published
- 2015
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39. High prevalence of arterial hypertension in a Brazilian Northeast population of low education and income level, and its association with obesity and metabolic syndrome.
- Author
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Lyra R, Silva Rdos S, Montenegro Junior RM, Matos MV, Cézar NJ, Fernandes VO, and Maurício-da-Silva L
- Subjects
- Adult, Aged, Aged, 80 and over, Blood Pressure physiology, Body Mass Index, Brazil epidemiology, Cross-Sectional Studies, Female, Humans, Hypertension complications, Male, Metabolic Syndrome complications, Middle Aged, Obesity complications, Prevalence, Risk Factors, Urban Population, Educational Status, Hypertension epidemiology, Income statistics & numerical data, Metabolic Syndrome epidemiology, Obesity epidemiology
- Abstract
Objective: The objectives of this study are to estimate the prevalence of arterial hypertension (AH) in an adult population with a predominance of families with low education and income levels, in the hinterlands of Pernambuco, Brazil, and to analyze its association with other factors related to cardiovascular diseases (CVD)., Methods: A cross-sectional study in 2008/2009 was conducted with a sample of 198 subjects stratified by age, and representative of the urban adult population of the Canaã district of city of Triunfo, in the hinterlands of Pernambuco, Brazil., Results: One hundred ninety eight individuals with average age of 57.7 years old (31 to 90 years-old), mainly women (65.6%), and with low income and education levels (81.3% with a monthly income of less than one minimum wage) were evaluated. Among these, 127 (64.1%) were identified as having AH, 54 (42.5%) of whom had no prior diagnosis. From those who were previously diagnosed, only 31.3% had good blood pressure control. Higher prevalence was observed in those individuals with lower incomes, higher body mass indexes (BMI), and those with metabolic syndrome (MS)., Conclusion: These data demonstrated that there was a high prevalence of AH in the urban, low education and income levels adult population of Triunfo, strongly associated with lower income levels, elevated BMI, and the presence of MS; and a high prevalence of bad blood pressure control among the previously diagnosed cases. These results indicate that more effective interventions for early detection and adequate control of this disease and its comorbidities are necessary.
- Published
- 2012
40. Treatment of type 2 diabetes in Latin America: a consensus statement by the medical associations of 17 Latin American countries. Latin American Diabetes Association.
- Author
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Guzmán JR, Lyra R, Aguilar-Salinas CA, Cavalcanti S, Escaño F, Tambasia M, and Duarte E
- Subjects
- Antihypertensive Agents therapeutic use, Body Mass Index, Combined Modality Therapy, Comorbidity, Decision Making, Diabetes Complications prevention & control, Diabetes Mellitus, Type 2 blood, Diabetes Mellitus, Type 2 diet therapy, Diabetes Mellitus, Type 2 drug therapy, Diabetes Mellitus, Type 2 epidemiology, Diet, Diabetic, Drug Therapy, Combination, Glycated Hemoglobin analysis, Goals, Humans, Hypoglycemic Agents administration & dosage, Hypoglycemic Agents classification, Hypoglycemic Agents therapeutic use, Insulin therapeutic use, Latin America epidemiology, Life Style, Metabolic Syndrome epidemiology, Metabolic Syndrome therapy, Obesity epidemiology, Obesity therapy, Societies, Medical, Diabetes Mellitus, Type 2 therapy
- Abstract
Latin America faces unique challenges in the treatment of type 2 diabetes mellitus. The Asociación Latinoamericana de Diabetes (Latin American Diabetes Association, ALAD) brought together medical associations in 17 countries in Latin America to produce a consensus statement regarding the treatment of type 2 diabetes. The goal of the document is to provide practical recommendations that will guide clinicians through a simple decision-making process for managing patients. The cornerstone elements for therapeutic decision making are: severity of hyperglycemia, clinical condition of the patient (stable or with metabolic decompensation), and body mass index. The consensus includes a section devoted specifically to patients with obesity. Information is presented as highly-relevant clinical questions. The algorithm is based on the scientific recommendations of the 2006 ALAD guidelines (a document prepared using an evidence-based approach) and data from recent randomized controlled studies.
- Published
- 2010
- Full Text
- View/download PDF
41. [Prevalence of diabetes and associated factors in an urban adult population of low educational level and income from the Brazilian Northeast wilderness].
- Author
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Lyra R, Silva Rdos S, Montenegro RM Jr, Matos MV, Cézar NJ, and Maurício-da-Silva L
- Subjects
- Adult, Age Distribution, Aged, Aged, 80 and over, Brazil epidemiology, Cross-Sectional Studies, Female, Health Surveys, Humans, Hypertension complications, Male, Metabolic Syndrome complications, Middle Aged, Obesity complications, Prevalence, Risk Factors, Sex Distribution, Urban Health statistics & numerical data, Diabetes Mellitus epidemiology, Socioeconomic Factors
- Abstract
Background: Diabetes mellitus (DM) is a public health problem in Brazil. The objective of this study was to investigate the prevalence of DM and its relation with socio-demographic features and other cardiovascular risk factors in a adult population from the wilderness of Pernambuco, Brazil., Subjects and Methods: In 2008/2009 a cross-sectional study in the adult urban population of Canãa district, city of Triunfo, in the wilderness of Pernambuco/Brazil was conducted. A representative sample of 198 individuals, with average age of 57.7 years, 80% with primary education and 81.3% with a monthly income of less than 1 minimum wage was randomly selected., Results: A prevalence of diabetes of 13.6% and 7.6% of disglycemia (6.6% of impaired fasting glycemia, and 1.0% of impaired glucose tolerance) was found. Among those with diabetes, 24% had no prior diagnosis. Among diabetics, metabolic syndrome (MS) and arterial hypertension (AH) were diagnosed in 87.5% and 68%, respectively. Besides these, there was a positive and significant association between DM and BMI, and between DM and MS., Conclusion: These data demonstrate a high prevalence of DM in the adult urban population from the wilderness of Pernambuco/Brazil. These results as well as their association with obesity and MS, indicate that more effective interventions are necessary for the prevention of these diseases also outside principal urban centers.
- Published
- 2010
- Full Text
- View/download PDF
42. Association of lipoprotein lipase D9N polymorphism with myocardial infarction in type 2 diabetes: the genetics, outcomes, and lipids in type 2 diabetes (GOLD) study.
- Author
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Izar MC, Helfenstein T, Ihara SS, Relvas WG, Santos AO, Fischer SC, Pinto LE, Lopes IE, Pomaro DR, Fonseca MI, Bodanese LC, Moriguchi EH, Saraiva JF, Introcaso L, Souza AD, Scartezini M, Torres KP, Zagury L, Jardim PC, Costa EA, Tacito LH, Forti A, Magalhaes ME, Chacra AR, Bertolami MC, Loures-Vale AA, Barros MA, Xavier HT, Lyra R, Argamanijan D, Guimaraes A, Novazzi JP, Kasinski N, Afiune A, Martinez TL, Santos RD, Nicolau JC, Cesar LA, Povoa RM, Carvalho AC, Han SW, and Fonseca FA
- Subjects
- Adult, Aged, Aged, 80 and over, Brazil, Case-Control Studies, Diabetes Mellitus, Type 2 blood, Diabetes Mellitus, Type 2 complications, Diabetes Mellitus, Type 2 enzymology, Female, Gene Frequency, Genetic Predisposition to Disease, Humans, Lipoprotein Lipase metabolism, Logistic Models, Male, Middle Aged, Myocardial Infarction blood, Myocardial Infarction enzymology, Odds Ratio, Phenotype, Prospective Studies, Risk Assessment, Risk Factors, Diabetes Mellitus, Type 2 genetics, Lipids blood, Lipoprotein Lipase genetics, Myocardial Infarction genetics, Polymorphism, Genetic
- Abstract
The association of polymorphisms affecting lipid metabolism with the risk of myocardial infarction (MI) in type 2 diabetes mellitus was investigated. The Genetics, Outcomes and Lipids in type 2 Diabetes (GOLD) Study is a prospective, multicenter study, conducted on 990 patients presenting diabetes and MI (n=386), or diabetes without previous manifestation of stroke, peripheral or coronary arterial disease (n=604), recruited from 27 institutions in Brazil. APO A1 (A/G -75 and C/T +83) and APO C3 (C/G 3'UTR) non-coding sequences, CETP (Taq 1B), LPL (D9N), APO E (epsilon2, epsilon3, epsilon4,), PON-1 (Q192R), and two LCAT variants Arg(147)-->Trp and Tyr(171)-->Stop were tested by PCR-RFLP. There was a higher prevalence of LPL DN genotype (19% vs.12%, p=0.03) and a higher frequency of the N allele (11% vs. 7%) among subjects with MI when compared to controls, with an odds ratio of MI for carriers of 9N allele of 2.46 (95% CI=1.79-3.39, p<0.0001). This association was present in men and women, in non-smokers and in hypertensive patients. A logistic regression model including gender, duration of diabetes, systolic blood pressure, HDL-C, left ventricle hypertrophy and D9N polymorphism showed that the latter still remained significantly associated with MI (OR=1.50, 95% CI=1.02-2.25, p=0.049). These findings suggest that D9N polymorphism can be a useful risk marker for myocardial infarction and that further potential candidate genes should be screened for exploratory analysis and for future therapeutic intervention in diabetes.
- Published
- 2009
- Full Text
- View/download PDF
43. [The fight goes on].
- Author
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Lyra R
- Subjects
- Brazil, Humans, Research, Endocrinology trends, Societies, Medical trends
- Published
- 2008
- Full Text
- View/download PDF
44. [Brazilian Consensus on second-generation antipsychotics and metabolic disorders].
- Author
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Elkis H, Gama C, Suplicy H, Tambascia M, Bressan R, Lyra R, Cavalcante S, and Minicucci W
- Subjects
- Brazil, Cardiovascular Diseases etiology, Cardiovascular Diseases mortality, Diabetes Mellitus, Type 2 chemically induced, Diabetes Mellitus, Type 2 complications, Dyslipidemias chemically induced, Humans, Metabolic Syndrome chemically induced, Metabolic Syndrome complications, Obesity chemically induced, Antipsychotic Agents adverse effects, Metabolic Diseases chemically induced, Schizophrenia drug therapy
- Abstract
Objective: To discuss current aspects of use of antipsychotics considering their metabolic side effects profile, which includes weight gain, dyslipidemias, diabetes and metabolic syndrome. Such metabolic effects increase the risk of mortality by cardiovascular disease, which is the leading cause of death among schizophrenic patients., Method: A consensus meeting was held, with participation of endocrinologists and psychiatrists specialists in schizophrenia and, based on a literature review, an article was elaborated emphasizing practical and helpful recommendations to clinicians., Results and Conclusions: Monitoring metabolic side effects is essential to patients taking antipsychotics, particularly in the case of second generation antipsychotics. Efficacy and tolerability should be carefully balanced in all phases of treatment.
- Published
- 2008
- Full Text
- View/download PDF
45. Cushing's syndrome in pregnancy: an overview.
- Author
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Vilar L, Freitas Mda C, Lima LH, Lyra R, and Kater CE
- Subjects
- Cushing Syndrome etiology, Cushing Syndrome therapy, Diabetes, Gestational diagnosis, Diagnosis, Differential, Female, Humans, Hypothalamo-Hypophyseal System physiopathology, Pre-Eclampsia diagnosis, Pregnancy Complications etiology, Pregnancy Complications therapy, Pregnancy Outcome, Cushing Syndrome diagnosis, Pregnancy metabolism, Pregnancy Complications diagnosis
- Abstract
Cushing's syndrome (CS) during pregnancy is a rare condition with fewer than 150 cases reported in the literature. Adrenal adenomas were found to be the commonest cause, followed by Cushing's disease. The gestation dramatically affects the maternal hypothalamic-pituitary-adrenal axis, resulting in increased hepatic production of corticosteroid-binding globulin (CBG), increased levels of serum, salivary and urinary free cortisol, lack of suppression of cortisol levels after dexamethasone administration and placental production of CRH and ACTH. Moreover, a blunted response of ACTH and cortisol to exogenous CRH may also occur. Therefore, the diagnosis of CS during pregnancy is much more difficult. Misdiagnosis of CS is also common, as the syndrome may be easily confused with preeclampsia or gestational diabetes. Because CS during pregnancy is usually associated with severe maternal and fetal complications, its early diagnosis and treatment are critical. Surgery is the treatment of choice for CS in pregnancy, except perhaps in the late third trimester, with medical therapy being a second choice. There does not seem to be a rationale for supportive treatment alone.
- Published
- 2007
- Full Text
- View/download PDF
46. Clinical and laboratory features greatly overlap in patients with macroprolactinemia or monomeric hyperprolactinemia.
- Author
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Vilar L, Naves LA, Freitas MC, Lima M, Canadas V, Albuquerque JL, Lyra R, Azevedo MF, and Casulari LA
- Subjects
- Adult, Biomarkers blood, Dopamine Antagonists therapeutic use, Erectile Dysfunction etiology, Female, Galactorrhea etiology, Humans, Hyperprolactinemia blood, Hyperprolactinemia complications, Male, Mass Screening, Menstruation Disturbances etiology, Middle Aged, Pituitary Neoplasms blood, Pituitary Neoplasms complications, Pituitary Neoplasms drug therapy, Predictive Value of Tests, Prolactinoma blood, Prolactinoma complications, Prolactinoma drug therapy, Reproducibility of Results, Treatment Outcome, Hyperprolactinemia diagnosis, Pituitary Neoplasms diagnosis, Prolactin blood, Prolactinoma diagnosis
- Abstract
Aim: The aim of this study was to evaluate the clinical and laboratory features of 64 patients with macroprolactinemia and to compare them to those of individuals with monomeric hyperprolactinemia., Methods: The study included 64 patients (54 women and 10 men) with macroprolactinemia and 96 patients (70 women and 26 men) with monomeric hyperprolactinemia (32 with prolactinomas)., Results: Symptoms related to prolactin (PRL) excess were found in about 44% of individuals from the macroprolactinemia group and in 88.5% of patients with monomeric hyperprolactinemia (P<0.0001). However, the frequency of menstrual disturbances (oligomenorrhea or amenorrhea), galactorrhea and erectile dysfunction did not differ in both groups. In contrast, the association of galactorrhea and menstrual disturbances was significantly more prevalent in women with monomeric hyperprolactinemia. Although mean PRL levels were higher in patients with monomeric hyperprolactinemia (565.9+/-2726.4 vs 113.3+/-94.5 ng/mL, P<0.001), there was a great overlap between both groups. Among macroprolactinemic patients, pituitary magnetic resonance imaging revealed an image suggestive of a microadenoma in 7 (10.9%) and a macroadenoma in 1 (1.6%). Normalization of PRL levels during therapy with dopamine agonists was significantly more frequent in patients with monomeric hyperprolactinemia than in subjects with macroprolactinemia (78.6% vs 32%, P=0.0006)., Conclusion: Our data show that symptoms related to PRL excess are frequently found in subjects with macroprolactinemia. Moreover, no clinical or laboratory features could reliably differentiate macroprolactinemic patients from those with monomeric hyperprolactinemia. Therefore, the screening for macroprolactin should not be restricted to asymptomatic patients.
- Published
- 2007
47. [Endogenous Cushing's syndrome: clinical and laboratorial features in 73 cases].
- Author
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Vilar L, Naves LA, Freitas Mda C, Moura E, Canadas V, Leal E, Teixeira L, Gusmão A, Santos V, Campos R, Lima M, Paiva R, Albuquerque JL, Egito CS, Botelho CA, Lyra R, Azevedo MF, and Casulari LA
- Subjects
- ACTH Syndrome, Ectopic etiology, Adenoma diagnosis, Adolescent, Adrenal Gland Neoplasms diagnosis, Adult, Child, Child, Preschool, Cushing Syndrome etiology, Cushing Syndrome physiopathology, Diagnosis, Differential, Epidemiologic Methods, Female, Humans, Hydrocortisone urine, Magnetic Resonance Imaging, Male, Middle Aged, Sensitivity and Specificity, Sex Factors, ACTH Syndrome, Ectopic diagnosis, Cushing Syndrome diagnosis, Dexamethasone administration & dosage, Glucocorticoids administration & dosage, Hydrocortisone blood
- Abstract
We studied clinical and laboratorial features of 73 patients with endogenous Cushing's syndrome, subdivided as follows: 46 (63%) with Cushing's disease (CD), 21 (28.7%) with an adrenal tumor and 6 (8.2%) with ectopic ACTH secretion (EAS). The rate of typical manifestations of hypercortisolism was similar regardless its etiology. In 100% of cases of Cushing's syndrome we observed serum cortisol levels greater than 1.8 microg/dL in low-dose dexamethasone (DMS) suppression tests, as well as elevation of serum or salivary midnight cortisol. However, urinary free cortisol was normal in 11.5% of patients. ACTH levels were suppressed in patients with adrenal tumors, normal or high in CD and always high in EAS. In the 8-mg overnight DMS suppression test, serum cortisol suppression > 50% was observed in 78.2% of cases of CD and in 33.3% of subjects with EAS, while an 80% suppression was only seen in CD. After stimulation with CRH or DDAVP an ACTH increase > 35% occurred in 81% of individuals with CD and 16.6% of those with EAS, while an ACTH increase > 50 achieved 100% specificity. Moreover, the combination of serum cortisol suppression > 50% and an ACTH increase > 35% in both tests only occurred in Cushing's disease. Pituitary magnetic resonance imaging identified 100% of macroadenomas and 59.4% of microadenomas in patients with CD. Among 10 patients that underwent bilateral inferior petrosal sinus sampling, a central-to-peripheral ACTH gradient > 3 after CRH or DDAVP had 90% sensitivity and 100% specificity for Cushing's disease.
- Published
- 2007
- Full Text
- View/download PDF
48. [Fighting promise].
- Author
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Lyra R
- Subjects
- Brazil, Humans, Endocrinology, Societies, Medical
- Published
- 2006
- Full Text
- View/download PDF
49. [Prevention of type 2 diabetes mellitus].
- Author
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Lyra R, Oliveira M, Lins D, and Cavalcanti N
- Subjects
- Antihypertensive Agents therapeutic use, Bariatric Surgery, Diabetes Mellitus, Type 2 drug therapy, Diabetes Mellitus, Type 2 etiology, Humans, Risk Factors, Diabetes Mellitus, Type 2 prevention & control, Hypoglycemic Agents therapeutic use, Life Style
- Abstract
Type 2 Diabetes mellitus (DM2) is a complex, multifactorial and worldwide metabolic disease that affects quality and lifestyle of patients. Patients with diabetes can have a 15-year or more reduction of lifetime and the high mortality is due to cardiovascular (CV) complications. Effective strategies for the reduction of the impact of DM2 on CV disorders for the next years and attention concerning to strategies of prevention, mainly for the populations with larger risk of developing the disease, are essential. In that context, impaired glucose tolerance (IGT) and impaired fasting glycemia (IFG) must suffer intervention strategies in order to minimize the risk for diabetes. Behavior modification (diet therapy and physical activity) must be stimulated, and pharmacological agents have to be used when indicated. Studies worldwide have been confirming the effectiveness of lifestyle strategies and even the use of pharmacological agents for the prevention of DM2.
- Published
- 2006
- Full Text
- View/download PDF
50. Glottis simulator.
- Author
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de Menezes Lyra R
- Subjects
- Humans, Anesthesiology education, Glottis, Intubation, Intratracheal methods
- Published
- 1999
- Full Text
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Catalog
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