13 results on '"Petrik B"'
Search Results
2. Trickling Filter/Solids Contact Performance with Rock Filters at High Organic Loadings
- Author
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Matasci, R. N., Clark, D. L., Heidman, J. A., Parker, D. S., Petrik, B., and Richards, D.
- Published
- 1988
3. Microtubule binding and disruption and induction of premature senescence by disorazole C 1
- Author
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Tierno, MB, Kitchens, CA, Petrik, B, Graham, TH, Wipf, P, Xu, FL, Saunders, WS, Raccor, BS, Balachandran, R, Day, BW, Stout, JR, Walczak, CE, Ducruet, AP, Reese, CE, Lazo, JS, Tierno, MB, Kitchens, CA, Petrik, B, Graham, TH, Wipf, P, Xu, FL, Saunders, WS, Raccor, BS, Balachandran, R, Day, BW, Stout, JR, Walczak, CE, Ducruet, AP, Reese, CE, and Lazo, JS
- Abstract
Disorazoles comprise a family of 29 macrocyclic polyketides isolated from the fermentation broth of the myxobacterium Soran- gium cellulosum. The major fermentation product, disorazole A 1, was found previously to irreversibly bind to tubulin and to have potent cytotoxic activity against tumor cells, possibly because of its highly electrophilic epoxide moiety. To test this hypothesis, we synthesized the epoxide-free disorazole C 1 and found it retained potent antiproliferative activity against tumor cells, causing prominent G 2/M phase arrest and inhibition of in vitro tubulin polymerization. Furthermore, disorazole C 1 produced disorganized micro- tubules at interphase, misaligned chromosomes during mitosis, apoptosis, and premature senescence in the surviving cell populations. Using a tubulin polymerization assay, we found dis- orazole C 1 inhibited purified bovine tubulin polymerization, with an IC 50 of 11.8 ± 0.4 μM, and inhibited [ 3H]vinblastine binding noncompetitively, with a K i of 4.5 ± 0.6 μM. We also found noncompetitive inhibition of [ 3H]dolastatin 10 binding by disorazole C 1, with a K i of 10.6 ± 1.5 μM, indicating that disorazole C 1 bound tubulin uniquely among known antimitotic agents. Disorazole C 1 could be a valuable chemical probe for studying the process of mitotic spindle disruption and its relationship to premature senescence. Copyright © 2009 by The American Society for Pharmacology and Experimental Therapeutics.
- Published
- 2009
4. Removal of enteric viruses and selected microbial indicators by UV irradiation of secondary effluent
- Author
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Jacangelo, J.G., primary, Loughran, P., primary, Petrik, B., primary, Simpson, D., primary, and McIlroy, C., primary
- Published
- 2003
- Full Text
- View/download PDF
5. Clinical and microbiological characteristics and follow-up of invasive Listeria monocytogenes infection among hospitalized patients: real-world experience of 16 years from Hungary.
- Author
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Kiss R, Marosi B, Korózs D, Petrik B, Lakatos B, and Szabó BG
- Subjects
- Humans, Male, Female, Middle Aged, Retrospective Studies, Aged, Hungary epidemiology, Adult, Follow-Up Studies, Anti-Bacterial Agents therapeutic use, Anti-Bacterial Agents pharmacology, Intensive Care Units statistics & numerical data, Bacteremia microbiology, Bacteremia mortality, Bacteremia epidemiology, Bacteremia drug therapy, Aged, 80 and over, Sepsis microbiology, Sepsis mortality, Sepsis epidemiology, Sepsis drug therapy, Hospital Mortality, Listeriosis mortality, Listeriosis microbiology, Listeriosis epidemiology, Listeriosis drug therapy, Listeria monocytogenes pathogenicity, Listeria monocytogenes isolation & purification, Listeria monocytogenes drug effects, Hospitalization statistics & numerical data
- Abstract
Purpose: Invasive Listeria monocytogenes infection is rare, but can lead to life-threatening complications among high-risk patients. Our aim was to assess characteristics and follow-up of adults hospitalized with invasive L. monocytogenes infection., Methods: A retrospective observational cohort study was conducted at a national referral center between 2004 and 2019. Patients with proven invasive listeriosis, defined by the European Centre for Disease Prevention and Control criteria, were included. Data collection and follow-up were performed using the hospital electronic system, up until the last documented visit. The primary outcome was in-hospital all-cause mortality, secondary outcomes included residual neurological symptoms, brain abscess occurrence, and requirement for intensive care unit (ICU) admission., Results: Altogether, 63 cases were identified (57.1% male, median age 58.8 ± 21.7 years), and 28/63 developed a complicated disease course (44.4%). At diagnosis, 38/63 (60.3%) presented with sepsis, 54/63 (85.7%) had central nervous system involvement, while 9/63 (14.3%) presented with isolated bacteremia. Frequent clinical symptoms included fever (53/63, 84.1%), altered mental state (49/63, 77.8%), with immunocompromised conditions apparent in 56/63 (88.9%). L. monocytogenes was isolated from blood (37/54, 68.5%) and cerebrospinal fluid (48/55, 87.3%), showing in vitro full susceptibility to ampicillin and meropenem (100% each), gentamicin (86.0%) and trimethoprim/sulfamethoxazole (97.7%). In-hospital all-cause mortality was 17/63 (27.0%), and ICU admission was required in 28/63 (44.4%). At discharge, residual neurological deficits (11/46, 23.9%) and brain abscess formation (6/46, 13.0%) were common., Conclusion: Among hospitalized adult patients with comorbidities, invasive L. monocytogenes infections are associated with high mortality and neurological complications during follow-up., (© 2024. The Author(s).)
- Published
- 2024
- Full Text
- View/download PDF
6. Clinical and Microbiological Outcomes and Follow-Up of Secondary Bacterial and Fungal Infections among Critically Ill COVID-19 Adult Patients Treated with and without Immunomodulation: A Prospective Cohort Study.
- Author
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Szabó BG, Czél E, Nagy I, Korózs D, Petrik B, Marosi B, Gáspár Z, Rajmon M, Di Giovanni M, Vályi-Nagy I, Sinkó J, Lakatos B, and Bobek I
- Abstract
Background: Nearly 10% of COVID-19 cases will require admission to the intensive care unit (ICU). Our aim was to assess the clinical and microbiological outcomes of secondary infections among critically ill COVID-19 adult patients treated with/without immunomodulation., Methods: A prospective observational cohort study was performed between 2020 and 2022 at a single ICU. The diagnosis and severity classification were established by the ECDC and WHO criteria, respectively. Eligible patients were included consecutively at admission, and followed for +30 days post-inclusion. Bloodstream-infections (BSIs), ventilator-associated bacterial pneumonia (VAP), and COVID-19-associated invasive pulmonary aspergillosis (CAPA) were defined according to international guidelines. Patient stratification was performed by immunomodulatory therapy administration (dexamethasone, tocilizumab, baricitinib/ruxolitinib). The primary outcome was any microbiologically confirmed major infectious complication, secondary outcomes were invasive mechanical ventilation (IMV) requirement and all-cause mortality., Results: Altogether, 379 adults were included. At baseline, 249/379 (65.7%) required IMV and 196/379 (51.7%) had a cytokine storm. At +30 days post-inclusion, the rate of any microbiologically confirmed major infectious complication was 151/379 (39.8%), IMV requirement and all-cause mortality were 303/379 (79.9%) and 203/379 (53.6%), respectively. There were no statistically significant outcome differences after stratification. BSI, VAP, and CAPA episodes were mostly caused by Enterococcus faecalis (27/124, 22.1%), Pseudomonas aeruginosa (26/91, 28.6%), and Aspergillus fumigatus (20/20, 100%), respectively. Concerning the primary outcome, Kaplan-Meier analysis showed similar probability distributions between the treatment subgroups (118/299, 39.5% vs. 33/80, 41.3%, log-rank p = 0.22), and immunomodulation was not retained as its independent predictor in multivariate logistic regression., Conclusions: Secondary infections among critically ill COVID-19 adult patients represent a relevant burden, probably irrespective of immunomodulatory treatment.
- Published
- 2023
- Full Text
- View/download PDF
7. COVID-19 in pediatric lung transplant recipients: Clinical course and outcome.
- Author
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Schütz K, Davids J, Petrik B, Zychlinsky Scharff A, Carlens J, Heim A, Salman J, Ius F, Bobylev D, Hansen G, Müller C, and Schwerk N
- Subjects
- Adolescent, Adult, Child, Female, Humans, Male, COVID-19 Testing, Disease Progression, Lung, Treatment Outcome, COVID-19 complications, COVID-19 diagnosis, COVID-19 therapy, SARS-CoV-2, Lung Transplantation
- Abstract
Background: COVID-19 causes high morbidity and mortality in adult lung transplant (LTX) recipients. Data on COVID-19 in children after LTX is limited. We report the clinical presentation and outcome of SARS-CoV-2 infection in 19 pediatric LTX recipients., Methods: Between March 2020 and June 2022, SARS-CoV-2 testing was performed on all pediatric LTX patients with COVID-19 symptoms or contact with a SARS-CoV-2 infected person. Positive patients were prospectively evaluated for symptoms, treatment and outcome. Vaccination status and immune response were recorded., Results: Nineteen out of 51 pediatric LTX recipients had a SARS-CoV-2 infection. Mean age was 12.3 years (IQR 9-17), 68% were female, 84% had preexisting comorbidities. Mean time between LTX and SARS-CoV-2 infection was 4.8 years (IQR 2-6). No patients experienced severe COVID-19: 11% were asymptomatic, and 89% had mild symptoms, primarily rhinitis (74%), fever (47%), and cough (37%). One SARS-CoV-2 positive patient was hospitalized due to combined fungal and bacterial infection. Mean duration of symptoms was 10.5 days (IQR 3-16), whereas mean period of positivity by antigen test was 21 days (IQR 9-27, p = 0.013). Preventive antiviral therapy was initiated in 3 patients. After a mean follow-up of 2.5 months (IQR 1.1-2.4), no patient reported persistent complaints related to COVID-19. Lung function tests remained stable., Conclusions: Unlike adult LTX recipients, children and adolescents are at low risk for severe COVID-19, even with risk factors beyond immunosuppression. Our findings cast doubt on the necessity of excessive isolation for these patients and should reassure clinicians and caregivers of LTX patients., (Copyright © 2022 International Society for Heart and Lung Transplantation. Published by Elsevier Inc. All rights reserved.)
- Published
- 2023
- Full Text
- View/download PDF
8. The combination needle injection-incision technique using the two-in-one needle-snare device for knife-assisted resection.
- Author
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Petrik B, Martínez-Alcalá A, Pawlak K, and Mönkemüller K
- Subjects
- Humans, Needles, Microsurgery, Gastroscopy methods, Surgical Wound
- Abstract
Competing Interests: Klaus Mönkemüller has received honoraria for consulting from Ovesco, Tübingen, Germany.
- Published
- 2022
- Full Text
- View/download PDF
9. Baricitinib vs tocilizumab treatment for hospitalized adult patients with severe COVID-19 and associated cytokine storm: a prospective, investigational, real-world study.
- Author
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Lakatos B, Szabó BG, Bobek I, Kiss-Dala N, Gáspár Z, Riczu A, Petrik B, Farkas BF, Sebestyén G, Gopcsa L, Bekő G, Sinkó J, Reményi P, Szlávik J, Mathiász D, and Vályi-Nagy I
- Subjects
- Humans, Adult, SARS-CoV-2, Prospective Studies, Treatment Outcome, Cytokine Release Syndrome drug therapy, COVID-19 complications
- Abstract
Objectives: Our aim was to compare outcomes of hospitalized adults with severe COVID-19 and cytokine storm treated with tocilizumab or baricitinib., Methods: A prospective, investigational, real-world study was performed from April 2020 to April 2021 at our center. COVID-19 severity was classified by World Health Organization criteria, and cytokine storm was documented along predefined criteria. Eligible patients were enrolled at diagnosis if they fulfilled a priori inclusion criteria and received standard-of-care plus tocilizumab or baricitinib for >48 hours. Patients were followed per protocol for 28 days post-diagnosis. The primary outcome was all-cause mortality; secondary outcomes were invasive mechanical ventilation and major infectious complications., Results: Of 463 patients, 102/463 (22.1%) received tocilizumab, and 361/463 (77.9%) baricitinib. Baseline characteristics were balanced. At 28 days, there was no difference in all-cause mortality (22/102, 21.6% vs 64/361, 17.7%; P-value = 0.38). Requirement for invasive mechanical ventilation was more frequent after tocilizumab (52/102, 50.9% vs 96/361, 26.6%; P <0.01), rate of major infectious complications was similar (32/102, 31.4% vs 96/361, 26.6%; P-value = 0.34). In logistic regression, the immunomodulatory drug was not retained as a predictor of all-cause mortality. Kaplan-Meier analysis revealed statistically similar survival distributions., Conclusion: All-cause mortality was similar between adults treated with baricitinib or tocilizumab for severe COVID-19 with cytokine storm., Competing Interests: Declaration of competing interest The authors have no competing interests to declare., (Copyright © 2022 The Authors. Published by Elsevier Ltd.. All rights reserved.)
- Published
- 2022
- Full Text
- View/download PDF
10. Favipiravir treatment does not influence disease progression among adult patients hospitalized with moderate-to-severe COVID-19: a prospective, sequential cohort study from Hungary.
- Author
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Szabo BG, Lenart KS, Petrik B, Gaspar Z, Kiss-Dala N, Szlavik J, Valyi-Nagy I, and Lakatos B
- Subjects
- Amides, Cohort Studies, Disease Progression, Humans, Hungary, Prospective Studies, Pyrazines, SARS-CoV-2, Treatment Outcome, COVID-19 Drug Treatment
- Abstract
Data suggests that favipiravir (FVP) could be used against SARS-CoV-2. Our aim was to investigate the role of FVP in COVID-19 treatment. A prospective sequential cohort study was performed among adults hospitalized at our center between March and August 2020 with moderate-to-severe, PCR-confirmed COVID-19. For diagnosis and severity, ECDC and WHO definitions were utilized. Patients were screened for inclusion by a priori criteria and included in the FVP cohort if standard-of-care (SOC) + FVP or the non-FVP cohort if SOC ± other antivirals without FVP were administered for > 48 h from diagnosis. Treatment allocation was done per national guidelines, based on severity and drug availability. Primary endpoint was disease progression, a composite of 14-day all-cause death, need for mechanical ventilation, or immunomodulatory therapy. The impact of FVP exposure on disease progression was analyzed by binomial logistic regression. In all, 150 patients were included, 75 in each cohort. Disease progression (17/75, 22.7% vs. 10/75, 13.3%, p = 0.13), 14-day all-cause death (9/75, 12.0% vs. 10/75, 13.3%, p = 0.8), and need for mechanical ventilation (8/75, 10.7% vs. 4/75, 5.3%, p = 0.22) were similar, while immunomodulatory therapies were required more frequently among patients receiving FVP (10/75, 13.3% vs. 1/75, 1.3%, p < 0.01). The use of favipiravir was not retained as a protective factor against disease progression in multivatiate analysis. Time to antiviral therapy from PCR positivity, disease severity, need for oxygen supportation, and ICU admittance rates did not differ statistically between cohorts. In this study, favipiravir did not seem to positively affect disease progression., (© 2021. The Author(s).)
- Published
- 2021
- Full Text
- View/download PDF
11. Laboratory parameters predicting mortality of adult in-patients with COVID-19 associated cytokine release syndrome treated with high-dose tocilizumab.
- Author
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Lakatos B, Szabo BG, Bobek I, Gopcsa L, Beko G, Kiss-Dala N, Petrik B, Gaspar Z, Farkas BF, Sinko J, Remenyi P, Szlavik J, and Valyi-Nagy I
- Abstract
Large randomized clinical trials in severe Coronavirus Disease 2019 (COVID-19) patients have proven efficacy of intravenous tocilizumab. Our aim was to describe the laboratory parameters predicting in-hospital mortality of patients with tocilizumab administration in COVID-19 associated cytokine release syndrome (CRS).We evaluated high-dose (8 mg/kg) intravenous tocilizumab administration in severe and critically ill COVID-19 adult patients fulfilling predefined strict CRS criteria. A single-centre, prospective, observational cohort study was carried out among consecutive adult (≥18 years of age) in-patients with COVID-19 between April 1 and December 31, 2020. The primary endpoint was 28-day all-cause mortality. The changes in laboratory parameters from baseline on day 7 and 14 after administration of tocilizumab were analysed.In total, 1801 patients were admitted to our centre during the study period. One hundred and six patients received tocilizumab, and among them 62 (58.5%) required intensive care unit admittance while 25 (23.6%) deceased. At day 7 after tocilizumab administration, inflammatory markers (CRP, IL-6, ferritin) and lactate dehydrogenase (LDH) values were significantly lower among survivors. Subsequently, at day 14, differences of IL-6 and LDH levels has become more pronounced between subgroups. Restoration of absolute lymphocyte count (ALC) by day 7 and 14 was insufficient among patients who died.In our cohort, administration of high-dose tocilizumab for COVID-19 patients with CRS demonstrated clinical and sustained biochemical parameter improvement in 76.4%. In this patient population high and increasing LDH, IL-6, and low ALC levels had a predictive role for mortality.
- Published
- 2021
- Full Text
- View/download PDF
12. Mortality salience and symbols of cultural worldview affect the desirability of a stressful job: the ironic consequences of terror management.
- Author
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Wirth-Petrik B and Guenther RK
- Subjects
- Adult, Attitude to Death, Cultural Characteristics, Female, Humans, Male, Pain psychology, Psychiatric Status Rating Scales, Psychological Tests, Psychological Theory, Young Adult, Affect physiology, Employment psychology, Stress, Psychological psychology
- Abstract
In a study of terror management theory, participants first responded to prompts asking them to imagine their own death or dental pain and later rated the desirability of a generic job described explicitly as extremely stressful. The job description included either an American or foreign company logo. As predicted by terror management theory, the participants shown an American logo ironically desired the stressful job more, having been prompted with reminders of death than with reminders of dental pain. This study is the first to examine terror management theory's prediction of the influence of symbols of cultural worldview on health-related decisions. The authors discuss possible implications of the findings for making unintentionally stress-inducing decisions and for public health campaigns.
- Published
- 2012
- Full Text
- View/download PDF
13. Microtubule binding and disruption and induction of premature senescence by disorazole C(1).
- Author
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Tierno MB, Kitchens CA, Petrik B, Graham TH, Wipf P, Xu FL, Saunders WS, Raccor BS, Balachandran R, Day BW, Stout JR, Walczak CE, Ducruet AP, Reese CE, and Lazo JS
- Subjects
- Aging, Premature physiopathology, Animals, Apoptosis drug effects, Cattle, Cell Division drug effects, Fibroblasts cytology, Fibroblasts drug effects, Fibroblasts physiology, G2 Phase drug effects, HeLa Cells cytology, HeLa Cells drug effects, Humans, Kinetics, Macrolides, Microtubules drug effects, Myxococcales, Oxazoles isolation & purification, Tubulin metabolism, Vinblastine antagonists & inhibitors, Vinblastine metabolism, Cellular Senescence drug effects, Microtubules physiology, Oxazoles pharmacology
- Abstract
Disorazoles comprise a family of 29 macrocyclic polyketides isolated from the fermentation broth of the myxobacterium Sorangium cellulosum. The major fermentation product, disorazole A(1), was found previously to irreversibly bind to tubulin and to have potent cytotoxic activity against tumor cells, possibly because of its highly electrophilic epoxide moiety. To test this hypothesis, we synthesized the epoxide-free disorazole C(1) and found it retained potent antiproliferative activity against tumor cells, causing prominent G(2)/M phase arrest and inhibition of in vitro tubulin polymerization. Furthermore, disorazole C(1) produced disorganized microtubules at interphase, misaligned chromosomes during mitosis, apoptosis, and premature senescence in the surviving cell populations. Using a tubulin polymerization assay, we found disorazole C(1) inhibited purified bovine tubulin polymerization, with an IC(50) of 11.8 +/- 0.4 microM, and inhibited [3H]vinblastine binding noncompetitively, with a K(i) of 4.5 +/- 0.6 microM. We also found noncompetitive inhibition of [3H]dolastatin 10 binding by disorazole C(1), with a K(i) of 10.6 +/- 1.5 microM, indicating that disorazole C(1) bound tubulin uniquely among known antimitotic agents. Disorazole C(1) could be a valuable chemical probe for studying the process of mitotic spindle disruption and its relationship to premature senescence.
- Published
- 2009
- Full Text
- View/download PDF
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