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291 results on '"Verghese M"'

1. Survival, Attachment, and Healing: An Evolutionary Lens on Interventions for Trauma-Related Dissociation

Author

Burback L, Forner C, Winkler OK, Al-Shamali HF, Ayoub Y, Paquet J, and Verghese M

Subjects
derealization, depersonalization, posttraumatic stress disorder, psychotherapy, psychopharmacology, transcranial magnetic stimulation, Psychology, BF1-990, Industrial psychology, HF5548.7-5548.85
Abstract

Lisa Burback,1,2 Christine Forner,3 Olga Karolina Winkler,1 Huda F Al-Shamali,1 Yahya Ayoub,1 Jacquelyn Paquet,1 Myah Verghese4 1Department of Psychiatry, University of Alberta, Edmonton, Alberta, Canada; 2Neuroscience and Mental Health Institute (NMHI), University of Alberta, Edmonton, Alberta, Canada; 3Associated Counseling, Calgary, Alberta, Canada; 4Department of Neuroscience, University of Alberta, Edmonton, Alberta, CanadaCorrespondence: Lisa Burback, Department of Psychiatry, University of Alberta, 4-142A Katz Group Centre for Research, 11315 - 87 Ave NW, Edmonton, AB, T6G 2H5, Canada, Tel +1 780 342 5635, Fax +1 780 342 5230, Email burback@ualberta.caPurpose: Dissociation is a necessary part of our threat response system, common to all animal species, normally temporarily activated under conditions of extreme or inescapable threat. Pathological dissociation, however, continues to occur after the initial threat has passed, in response to reminders or inaccessibility of safety and security. Present across the spectrum of psychiatric diagnoses, recurrent dissociative symptoms are linked to severe trauma exposure, insecure attachment, treatment non-response, and maladaptive coping behaviors such as substance use, suicidality, and self-harm. However, empirical studies testing treatments specific to dissociative processes remain scarce. This narrative review summarizes existing studies and provides theoretical, neurobiological, and evolutionary perspectives on dissociative processes and treatments for pathological dissociation.Methods: A systematic search of five databases (MEDLINE, EMBASE, APA PsycINFO, CINAHL plus, Scopus) was conducted on April 13, 2023. Peer-reviewed clinical studies with adult participants, assessing intervention effects on dissociative symptoms, were included. Results were thematically analyzed and summarized.Results: Sixty-nine studies were identified, mainly focused on posttraumatic stress disorder, trauma-exposed populations, and borderline personality disorder. Psychotherapy was studied in 72.5% of studies; other interventions included medications and neurostimulation. The majority reported positive outcomes, despite the heterogeneous spectrum of interventions. However, treatment of dissociative symptoms was the primary objective in only a minority.&#x00A0Conclusion: Pathological dissociation is a complex phenomenon involving brain and body systems designed for perceiving and responding to severe threats, requiring an individualized approach. A literature is emerging regarding potentially evidence-based treatments to help those impacted by recurrent dissociative symptoms. When contextualized within a neurobiological and evolutionary perspective, these treatments can be understood as facilitating an internal and/or relational sense of safety, resulting in symptom reduction. Further studies are needed to explore effective treatments for dissociative symptoms.Keywords: derealization, depersonalization, posttraumatic stress disorder, psychotherapy, psychopharmacology, transcranial magnetic stimulation

Published
2024

5. Impact Of Social Media On Mental Health And Quality Of Life Among Adolescents.

Author

Verghese, M. Jeena and Premalatha, R.

Subjects
MENTAL illness, SLEEP, CYBERBULLYING, DIGITAL literacy, LIFE satisfaction
Abstract

The rapid rise of social media has transformed how adolescents communicate, engage, and form social identities. This study examines the impact of social media on the mental health and quality of life among adolescents, a population increasingly reliant on digital platforms. While social media offers opportunities for self-expression, learning, and connectivity, it also poses significant risks, such as cyber bullying, addiction, and the fear of missing out (FOMO). These factors can contribute to anxiety, depression, and other mental health challenges. The study aims to explore the dual-edged nature of social media use by assessing its influence on adolescents' mental well-being, social relationships, and overall life satisfaction. Using a mixed-methods approach, quantitative data was collected through structured questionnaires administered to adolescents aged 12-18, focusing on their social media habits, mental health symptoms, and perceptions of life quality. Qualitative data, derived from in-depth interviews, provided insight into individual experiences and emotional responses related to social media interactions. The results indicate a correlation between excessive social media use and increased mental health challenges, including heightened anxiety, low self-esteem, and disrupted sleep patterns. However, the study also highlights positive aspects, such as peer support and access to online resources that can improve self-awareness and coping mechanisms. This research underscores the importance of fostering balanced and mindful social media consumption to mitigate negative impacts on adolescents' mental health. It calls for collaborative efforts from parents, educators, and policymakers to develop strategies that promote digital literacy, emotional resilience, and a healthy relationship with technology. [ABSTRACT FROM AUTHOR]

Published
2024

10. A Study Of Mental Health In Relation To Quality Of Life And Coping Strategies Among Adolescents.

Author

VERGHESE, M. JEENA and PREMALATHA, R.

Subjects
QUALITY of life, MENTAL health, TEENAGERS, MINDFULNESS, PSYCHOLOGICAL adaptation, SOCIAL isolation, SEMI-structured interviews
Abstract

This study aimed to investigate the intricate relationship between mental health, quality of life, and coping strategies among adolescents. The transitional phase of adolescence presents unique challenges that can significantly impact mental well-being and overall quality of life. The study aimed to shed light on the coping mechanisms adopted by adolescents in various situations and their subsequent effects on mental health and quality of life outcomes. A mixed-methods approach was employed, involving both quantitative and qualitative techniques. A sample of 160 adolescents, aged 17 to 26, was selected from diverse socio-economic backgrounds. Quantitative data were collected using standardized measures assessing various dimensions of mental health and quality of life. Additionally, a series of semistructured interviews were conducted to gather qualitative insights into the coping strategies employed by adolescents and their subjective experiences. The findings revealed a strong correlation between mental health and quality of life among adolescents. Adolescents reporting higher levels of mental well-being also exhibited better overall quality of life. Coping strategies were found to play a significant role in moderating this relationship. While some participants relied on adaptive coping mechanisms such as seeking social support, engaging in hobbies, and practicing mindfulness, others resorted to maladaptive strategies including substance use, avoidance, and self-isolation. The qualitative analysis provided a deeper understanding of the underlying factors influencing the choice of coping strategies. The implications of the study underscore the importance of early intervention and support systems for adolescents facing mental health challenges. Education and promotion of adaptive coping strategies should be integrated into school curricula and community programs. The study also highlights the need for further research into the effectiveness of various coping strategies in different cultural and socio-economic contexts. [ABSTRACT FROM AUTHOR]

Published
2023

12. General anaesthetic and airway management practice for obstetric surgery in England: a prospective, multicentre observational study

Author

Odor, P. M., Bampoe, S., Moonesinghe, S. R., Andrade, J., Pandit, J. J., Lucas, D. N., A’Court, A., Abdel-Gadir, D., Abdu, A., Abisogun, C., Aboud, Z., Abrams, J., Ackerman, A., Adamson, C., Addison, R., Adeyeye, A., Adler, R., Aduse-Poku, M., Adyanthaya, S., Ahmad, N., Ahmed, D., Ahmed, A., Akindele, B., Akindele, O., Akrimi, S., Al-Rawi, S., Ali, Y., Allam, J., Allana, A., Allen, K., Allen, O., Amaradasa, N., Amarasekara, L., Amoakwa-adu, F., Anandageetha, P., Anandakrishnan, S., Anandanadesan, R., Anderson, M., Apps, S., Aquilina, A., Arbane, G., Arch, A., Armstrong, S., Arya, R., Ashiru, G., Ashpole, K., Atkinson, C., Atkinson, F., Auer, E., Avery, B., Babio-Galan, M., Bader, H., Badham, G., Bagchi, S., Bailey, S., Baird, Y., Balaka, C., Baldwin, M., Balfour, P., Bali, S., Banks, S., Barclay, P., Barnes, L., Barnes, T., Barot, N., Barrett, S., Barrett, V., Barrett, K., Bates, L., Batte, K., Baytug, B., Behravesh, M., Bell, S., Benloch, R., Bentley, R., Berg, J., Berwick, C., Berwick, R., Bhadange, R., Bhattacharyya, S., Bielskute, E., Birch, S., Bird, S., Bird, Ruth, Birts, William, Black, Becky, Blagova, Tatyana, Blake, Holly, Blightman, Oliver, Blunden, Susara, Bolton, R., Borkett-Jones, C., Boselli, J., Bowen, M., Bowen, R., Bowyer, J., Boyle, H., Brar, Z., Bray, J., Brayshaw, S., Bressington, C., Brewer, A., Brice, N., Bridge, L., Briscoe, J., Brocklesby, S., Brown, H., Brown, S., Brunnen, D., Burijintichenna, K., Burnard, S., Burtt, A., Buswell, V., Bykar, H., Cairney, M., Calvert, C., Camarasa, L., Campbell, N., Campbell-Jones, F., Cantliffe, J., Carrol, W., Carvalho, J., Cashell, C., Cassie, S., Cassim, K., Chandler, M., Chapman, R., Charles, R., Chen, P., Cheyne, D., Chima, K., Chin, F., Chirvasuta, R., Shao Chong, M., Choudhury, S., Chowdhury, P., Christmas, T., Chughwani, S., Ciechanowicz, S., Clarey, E., Coe, R., Cohen, J., Coker, N., Collins, K., Collis, L., Comar, J., Conroy, M., Constantin, K., Corfe, J., Coulborn, E., Cowie, V., Crone, R., Cronin, J., Crooks, J., Crowther, N., Crowther, E., Cruz, C., Curtis, A., Curtis, S., Dabrowicz, A., Daines, N., Dalal, V., Dannatt, P., Das, D., Dash, J., Davidson, K., Davies, S., Davis, Y., Dawson, J., Dean, J., Dean, C., Denman, J., Desai, N., Dewan, P., Dimont, S., Donovan, C., Doraiswami, M., Doughty, K., Douglass, J., Dower, M., Downing, S., Duberry, W., Duckham, E., Dudgeon, L., Dukes, S., Dunn, L., Duraiswamy, V., Dwyer, A. O., Dyer, K., Eapen, S., Earl, M., Eason, S., Edwards, K., Edwards, Z., Egole, O., Ekpa, J., el-Amin, O., el-Boghdadly, K., Elbasir, O., Eldridge, J., Elgie, L., Ellington, M., Elliott, K., Elliott, J., Elmi, M., Elnoumeir, R., Emeakaraoha, E., Evans, M., Everett, M., Fabb, P., Farooq, H., Farrimond, R., Faulds, F., Fawcett, E., Feneley, A., Fernando, D., Ferns, J., Finlay, C., Fitzgerald, S., O’Flaherty, D., Fleet, M., Fletcher, L., Fludder, V., Follet, T., Forbes, J., Forth, M., Foster, G., Francis, J., Fraser, K., Friedman, L., Fruggeri, L., Fulton, L., Funnell, S., Gadre, A., Gandhi, A., Gardiner, H., Garner, Z., Garvey, G., Gately, T., George, R., Gillespie, S., Glover, S., Goddard, J., Goodman, B., Gopal, T., Graham, G., Green, D., Griffin, D., Griffith, J., Grigsby, S., Grindey, J., Griffiths, H., Groome, J., Grother, C., Grounds, G., Groves, A., Guha, A., Gunawardhana, A., Gupta, A., Gupta, R., Gutsell, J., Haddon, R., Hadi, D., Hadjipavlou, N., Hammerbeck, H., Hammon, L., Hammond, S., Hampanna, H., Hancock, H., Handapangoda, H., Haroon-Mowahed, Y., Harpham, D., Harris, G., Harrison, A., Harshan, D., Hartopp, A., Harty, E., Haslam, N., Hawkins, G., Hawkins, E., Hawksey, S., Hays, C., Hazelton, T., Heavyside, A., Hemeson, C., Henderson, K., Henry, O., Herbert, L., Higgins, N., Hilton, J., Hindmoor, C., Hitchcock, R., Hobbs, L., Homsy, M., Honeywell, C., Hoque, N., House, K., Howle, R., Tiller, A., Huniak, M., Hunte, J., Husain, T., Huson, C., Hussain, C., Hussain, T., Hussein, Z., Hyams, J., Hyde, E., Laverdino, M., Ignacka, A., Innes, E., Ioannidis, S., Iqbal, R., Ismail, F., Jackson, J., Jackson, M., Jackson, G., Jacobs, R., Jadhav, P., Jalaly, A., James, L., James, M., Jani, S., Jeganathan, C., Joannides, C., Johnson, R., Johnson, T., Johnston, C., Jones, R., Jones, T., Kadr, M., Kainth, R., Kane, J., Kanji, R., Kannanparambil, S., Kar, G., Kasianandan, T., Kaskos, H., Kavanagh, L., Kaye, R., Kelliher, L., Kelliot, S., Kelly, J., Kenyon, C., Kessack, L., Kestner, S., Khaku, M., Khaleeq, S., Khan, P., Khan, S., Kidwai, U., King, C., King, H., Kingston, E., Kok, W., Konig, R., Konstantinova, Z., Krishnan, P., Kua, J., Kuntumalla, K., Kursumovic, E., Kurzatkowski, K., Kuttambakam, H., Lane, K., Lane, S., Langton, A., Latif, H., Lau, N., Laxman, S., Laycock, H., Lee, R., Leonardi, S., Light, K., Lightfoot, H., Liu, S., Liyanage, S., Lowe, J., Lucas, N., Lungu, M., Lunn, M., Lynes, H., Machavarapu, K., Mackenzie, M., Magee, D., Major, J., Male, V., Malik, Z., Manso, K., Maquinana, M., Marciniak, K., Maronge, L., Marsh, C., Martella, C., Martin, N., Martins, N., Marway, J., Mason, L., Masood, N., Masters, J., Maton-Howarth, M., Mazzola, F., McAllister, T., McCarthy, R., McCormick, C., McCready, S., McDougall, S., Mcewan, L., McGarry, J., McKevitt, H., Mckinley, S., Mckskeane, A., McMaster, E., McMonagle, M., McNamara, H., McPhee, H., McRae, L., Mead, D., Meadows, E., Mehta, M., Meikle, J., Metodiev, Y., Michael, C., Millar, V., Miller, S., Miller, G., Milne, S., Miltsios, K., Misquita, L., Misquita, S., Mittal, M., Mohamed, M., Powell Monaghan, K., Monk, J., Monkhouse, A., Monks, D., Montague, L., Moon, A., Moran, J., Moreton, A., Morgan, E., Morgan, O., Morland, D., Morosan, M., Morris, K., Morris, A., Moser, C., Mount, M., Muir, C., Mupudzi, M., Murali, M., Murdoch, I., Murray, H., Murray, T., Murrell, K., Narasimha Murthy, G., Neeley, D., Nei, H., Neil, K., Nejim, T., Nel, M., Nicholson, A., Nicklin, A., Nolan, C., Nolan, T., Nurmi, E., O’Neill, B., Oakes, C., Oakes, N., Ochoa-Ferraro, M., Odeleye, N., Oliver, K., Oliver, M., Onslow, J., Onwochei, D., Oommen, T., Orr, T., Osagie, O., Osborn, H., Overend, J., Owston, H., Pack, E., Padhi, P., Palani, P., Pandey, R., Pandya, D., Panesar, N., Papageorgiou, C., Papanastasiou, G., Papoutsos, C., Pararajasingham, S., Parry, J., Patel, H., Patel, J., Patel, K., Patel, M., Patel, R., Patel, N., Pathak, S., Pearson, F., Peciulene, V., Peers, B., Peirce, B., Pepper, S., Perinpanayagam, J., Perry, H., Petrova, N., Phillips, T., Phillips, S., Phylactides, L., Pilkington, F., Plumb, J., Poimenidi, E., Sau Kuk Poon, A., Potter, T., Poultney, U., Powell, L., Prenter, A., Preston, K., Price, A., Pritchard, N., Pullen, J., Purohit, M., Quamina, C., Qureshi, J., Rajput, Z., Ramage, S., Ramanathan, T., Ranasinghe, U., Ranatunga, K., Rand, A., Randive, S., Rangarajan, D., Rao, C., Rao Pelluri, S., Ratnasingham, A., Razzaque, J., Reddy, A., Redington, K., Reel, E., Remeta, P., Ricco, F., Riccoboni, A., Rice, P., Rich, M., Richards, N., Riches, J., Ripoll, S., Roberts, F., Roberts, K., Robins, K., Robinson, S., Roche, S., Rojo, M., Carmela Romano, N., Rosser, H., Roughley, L., Routley, C., Rowley, C., Rudra, P., Russell, R., Ryan, C., Saad, C., Sadeghi, A., Salberg, A., Salota, V., Samuel, M., Samuels, R., Sanapala, S., Sanusi, S., Sarao, S., Sathyabhama, S., Saunders, Z., Sawarzynska-ryszka, B., Sceales, P., Schumacher, N., Schwartz, N., Sellers, C., Sellers, H., Sellick, J., Sen, S., Senaratne, D., Senbeto, S., Seneviratna, D., Setty, T., Shah, R., Shah, S., Shambly, J., Sharafudeen, S., Sharieff, I., Sharifi, L., Sharpe, L., Shaw, M., Sheldrake, I., Shinde, P., Shonfeld, A., Short, J., Siah, J., Sibug, S., Siddique, O., Siew, S., Simpson, M., Singleton, G., Sinha, K., Sinha, A., Sinnott, M., Sivadhas, H., Sivakumar, S., Sivarajan, B., Sivarajan, S., Skeoch, C., Slade, S., Slater, P., Smith, C., Smith, E., Smith, J., Smith, L., Smith, A., Smith, R., Smith, S., Smith, T., Smithers, H., Smolen, S., Smyth, C., Snel, T., Snipe, C., Soltanifar, S., Sonawane, N., Soundararaja, A., Spence, E., Spiliopoulos, M., Srivastava, C., Stacey, K., Stafford, H., Staines, N., Stead, R., Stevens, E., Stilwell, A., Stocks, G., Stokes, A., Stone, C., Straughan, B., Subbarathnam, V., Sudunagunta, S., Sultan, P., Suppiah, P., Surve, P., Sutherland, A., Swanton, R., Swarbrick, C., Swinson, A., Syrrakou, E., Tadbiri, S., Tamhane, P., Tamilselvan, P., Tan, A., Tanna, S., Tarft, H., Tarry, L., Taylor, I., Taylor, S., Tebbot, J., Theron, S., Thomas, M., Todd, S., Tolliday, H., Topham, C., Tovell, N., Traves, M., Trodd, D., Tufchi, A., Turley, K., Turnbull, M., Turnbull, C., Turner, O., Turner, W., Turney, S., Tyagi, E., Uncles, D., Unsworth, V., Vadnere, P., Varadan, R., Vasishta, V., Veal, A., Vedham, L., Venkaya, J., Verghese, M., Veronica, I., Vidanagamage, D., Vincent, R., Vyapury, V., Wain, H., Walbridge, F., Walker, E., Walsh, P., Walshe, E., Walters, M., Wan, Y., Wang, C., Wankhade, K., Waters, G., Watts, C., Webber, A., Wedgwood, T., Wee, M., Wellstead, S., White, A., Whitear, M., Whitefield, L., Wilkinson, S., Williams, L., Williams, R., Wilson, D., Wilson, S., Wimble, K., Winkley, E., Winslow, L., Winwright, P., Wloch, K., Wong, G., Wong, H., Man Wong, J., Wood, T., Wray, S., Wrench, I., Wu, J., Wynn, K., Yap, Y., Kuan Yeow, C., Young, E., Yusaf, A., Uz Zafar, S., Zeinali, D., Zhang, S., Zope, S., Zucco, L., Anwar, S., Blunt, N., Grover, V., Grailey, K., Gray, M., Highton, D., Hopkins, P., Kemp, H., Lo, Q., Martin, D., Morkane, C., O’Carroll, J., Oliver, C., Post, B., Visram, A., Wickham, A., General Paediatrics, Graduate School, Adult Psychiatry, and Pulmonology

Subjects
medicine.medical_specialty, medicine.medical_treatment, Population, 03 medical and health sciences, 0302 clinical medicine, 030202 anesthesiology, medicine, Caesarean section, General anaesthesia, general anaesthesia, 030212 general & internal medicine, Rocuronium, General anaesthetic, education, Neuromuscular Blockade, education.field_of_study, airway management, obstetrics, business.industry, Tracheal intubation, Surgery, Anesthesiology and Pain Medicine, caesarean section, Airway management, business, medicine.drug
Abstract

There are no current descriptions of general anaesthesia characteristics for obstetric surgery, despite recent changes to patient baseline characteristics and airway management guidelines. This analysis of data from the direct reporting of awareness in maternity patients' (DREAMY) study of accidental awareness during obstetric anaesthesia aimed to describe practice for obstetric general anaesthesia in England and compare with earlier surveys and best-practice recommendations. Consenting patients who received general anaesthesia for obstetric surgery in 72 hospitals from May 2017 to August 2018 were included. Baseline characteristics, airway management, anaesthetic techniques and major complications were collected. Descriptive analysis, binary logistic regression modelling and comparisons with earlier data were conducted. Data were collected from 3117 procedures, including 2554 (81.9%) caesarean deliveries. Thiopental was the induction drug in 1649 (52.9%) patients, compared with propofol in 1419 (45.5%). Suxamethonium was the neuromuscular blocking drug for tracheal intubation in 2631 (86.1%), compared with rocuronium in 367 (11.8%). Difficult tracheal intubation was reported in 1 in 19 (95%CI 1 in 16-22) and failed intubation in 1 in 312 (95%CI 1 in 169-667). Obese patients were over-represented compared with national baselines and associated with difficult, but not failed intubation. There was more evidence of change in practice for induction drugs (increased use of propofol) than neuromuscular blocking drugs (suxamethonium remains the most popular). There was evidence of improvement in practice, with increased monitoring and reversal of neuromuscular blockade (although this remains suboptimal). Despite a high risk of difficult intubation in this population, videolaryngoscopy was rarely used (1.9%).

Published
2020

20. Dietary inulin suppresses azoxymethane-induced aberrant crypt foci and colon tumors at the promotion stage in young fisher 344 rats

Author

Verghese, M., Rao, D.R., Chawan, C.B., Williams, L.L., and Shackelford, L.

Subjects
Nutrition -- Requirements, Insulin -- Physiological aspects, Colorectal cancer -- Physiological aspects, Rats -- Research, Food/cooking/nutrition
Abstract

This study was designed to determine the effect of 10% dietary long-chain inulin on the azoxymethane (AOM)-induced colonic preneoplastic aberrant crypt foci (ACF) and small intestinal and colon tumors at the initiation (I), promotion (P) and I + P stages (20 rats per treatment) in Fisher 344 male weanling rats. After an acclimatization period of 1 wk, groups of Fisher 344 male weanling rats were assigned to consume AIN 93G diet (control) or AIN 93G diet containing 10% inulin. All the rats received 16 mg/kg body AOM dissolved in saline subcutaneously at 7 wk of age followed by a second injection at 8 wk of age. An additional group of five rats received only saline and consumed the control diet. The rats received the assigned diets until asphyxiation by C[O.sub.2] at 16 wk of age for the ACF experiment and 45 wk for the end-point tumor experiment. Feed intake, weight gain, diarrheal index, cecal weight, cecal pH, ACF and tumors in the colon were determined. Rats fed inulin had diarrhea after 2 wk of feeding and recovered by ~4 wk. Cecal weight was greater in rats fed inulin and cecal pH was lower. The inulin group had more than 66% fewer aberrant crypts and 60% fewer ACF compared with the control group. Tumor incidences in the small intestine and colon of rats in the control, I, P and I + P groups were: 78, 31, 0 and 11% and 90, 73, 69 and 50%, respectively. The corresponding values for the distal portion of the colon were 87, 63, 45 and 33%, respectively. Colon tumors per tumor-bearing rat were 4.2, 3.09, 1.36 and 1.2 for the control, I, P and I + P groups, respectively. All groups differed, P < 0.05. The results of this study indicate that dietary long-chain inulin suppresses AOM-induced ACF formation, an early preneoplastic marker of colon tumorigenesis in rats, and colon tumors, particularly at the promotion stage. KEY WORDS: * azoxymethane * aberrant crypt foci * inulin * colon tumors * Fisher 344 rats

Published
2002

21. Dietary inulin suppresses azoxymethane-induced preneoplastic aberrant crypt foci in mature fisher 344 rats

Author

Verghese, M., Rao, D.R., Chawan, C.B., and Shackelford, L.

Subjects
Inulin -- Physiological aspects, Dietary supplements -- Usage, Precancerous conditions -- Physiological aspects, Rats -- Research, Food/cooking/nutrition
Abstract

Preneoplastic aberrant crypt foci (ACF) are generally accepted as reliable markers for colon carcinogenesis in animal models. Rat model ACF studies, however, use younger rats, and there are no published reports on the suitability of adult rats for ACF studies. In this study, inulin, a known suppressor of azoxymethane (AOM)-induced ACF, was tested for its ability to suppress ACF formation in mature rats. After a 2-wk acclimation period, 12-mo-old Fisher 344 retired male breeders received two subcutaneous injections of AOM dissolved in saline at weekly intervals. In experiment 1, six groups received 0, 4, 8, 10, 12 and 16 mg AOM/kg body at each injection and were fed AIN-93M diet. In experiment 2, four groups of rats were fed 10 mg AOM/kg body at each injection based on the results of experiment 1, and were fed 0, 2.5, 5 and 10 g long-chain inulin diets/100 g. All the rats were killed after 11-wk feeding periods. In experiment 1, there was a significant (P < 0.05) AOM dose response on ACF formation. Rats fed >10 mg of AOM had greater (P < 0.05) mortality. In experiment 2, there was a significant increase in cecal weight and a decrease in cecal pH from 7.17 in the control group to 6.87, 6.61 and 5.76 in the groups fed inulin at 2.5, 5.0 and 10 g/100 g, respectively. Long-chain inulin dose-dependently reduced ACF incidence in the colon (P < 0.01). Compared with rats fed the control diet, the percentage reductions of ACF in rats fed 2.5, 5.0 and 10 g inulin diets/100 g were 25, 51, and 65, respectively. The results of this study indicate that mature rats can be used as models in ACF studies, and dietary long-chain inulin dose-dependently suppresses AOM-induced ACF formation in Fisher 344 mature male rats. KEY WORDS: * aberrant crypt foci * azoxymethane * colon carcinogenesis * inulin * mature rats *

Published
2002

22. Atomic layer deposition goes mainstream in 22nm logic technologies

Author

Verghese, M., Maes, J.W., and Kobayashi, N.

Subjects
Semiconductor wafers -- Technology application -- Electric properties -- Usage, Electroluminescent display systems -- Technology application -- Usage, Semiconductor industry -- Technology application -- Usage -- Electric properties, Solid state electronics -- Usage -- Technology application -- Electric properties, Semiconductor industry, Technology application, Business, Electronics and electrical industries
Abstract

EXECUTIVE OVERVIEW Atomic layer deposition (ALD) will be used in multiple areas of the 22nm logic process flow despite initial concerns about the technology's viability for high-volume manufacturing. Each application [...]

Published
2010

35. LaHfOx Films Analyses for NVM Applications

Author

Del Vitto A, Piagge R, Ravizza E, Spadoni S, Sebastiani A, Scozzari C, Wiemer C, Ghidini G, Alessandri M, Fanciulli M, Maes JW, and Verghese M

Published
2010

39. Purification and characterization of a type II phosphatidylinositol 4-kinase from rat spleen and comparison with a PtdIns 4-kinase from lymphocytes

Author

VERGHESE, M, FERNANDIS, AZ, and SUBRAHMANYAM, G

Subjects
Membranes, Signal-Transduction, A431 Cells, Tyrosine Phosphorylation, Stimulation, Antigen Receptor, T-Cell Activation, Protein-Kinase, Phosphoinositide Kinases, Turnover
Abstract

A PtdIns 4-kinase from rat spleen particulate fraction was purified to homogeneity and its molecular properties were compared with a PtdIns 4-kinase from splenic lymphocytes. The enzyme activity was solubilized from spleen particulate fraction with Triton X-100 and chromatographed sequentially on phosphocellulose, DEAE-sephacel, heparin acrylamide and hydroxyapatite columns. The purified enzyme preparation showed a 55 kDa band on SDS-PAGE with silver staining. Renaturation of the enzyme activity from SDS-PAGE showed that it comigrated with the 55 kDa protein. Characterization of the enzyme showed that it was a type II PtdIns 4-kinase. Polyclonal antibodies raised against PtdIns 4-kinase inhibited the enzyme activity in in vitro assays. Analysis of adult rat tissue particulate fractions on immunoblots showed restricted immunoreactivity among PtdIns 4-kinases. However, the immunoreactivity is conserved in lymphoid tissues from mouse to human, suggesting that lymphoid tissue has a distinct PtdIns 4-kinase. Activation of rat splenocytes with Con A showed two fold increase in PtdIns 4-kinase activity. Comparison of PtdIns 4-kinases from spleen and splenic lymphocytes showed identical chromatographic behaviour, molecular mass, immunoreactivity, K-m values for PtdIns and inhibition by adenosine.

Published
1999

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