Research Funding

  • July 14, 2021 - May 31, 2024 - Vertical Sleeve Gastrectomy for Treatment of NASH: a pilot randomized control , Co-Principal Investigator . Sponsor: NIH, Sponsor Award ID: R01DK128325
  • May 1, 2014 - April 30, 2021 - Treatment of Type I Diabetes by Islet Transplantation into the Gastric Submucosa , Principal Investigator . Sponsor: NIH, Sponsor Award ID: R01DK098581
  • September 30, 2009 - July 31, 2013 - "Advancing Islet Transplant for Type 1 Diabetes Care" , Principal Investigator . Sponsor: NIH, Sponsor Award ID: U01DK085531
  • September 21, 2009 - June 30, 2012 - Effect of Obesity on Long-Term Clinical Outcomes after Kidney Donation , Principal Investigator . Sponsor: NIH, Sponsor Award ID: R21DK078702

Education

M.D., 1993 - School of Medicine, University of Pennsylvania
Residency, - Internal Medicine, University of California, San Francisco

Selected Publications

  1. Wu KC, Cao S, Weaver CM, King NJ, Patel S, Kingman H, Sellmeyer DE, McCauley K, Li D, Lynch SV, Kim TY, Black DM, Shafer MM, Özçam M, Lin DL, Rogers SJ, Stewart L, Carter JT, Posselt AM, Schafer AL. Prebiotic to Improve Calcium Absorption in Postmenopausal Women After Gastric Bypass: A Randomized Controlled Trial. J Clin Endocrinol Metab. 2022 03 24; 107(4):1053-1064.  View on PubMed
  2. Witkowski P, Philipson LH, Buse JB, Robertson RP, Alejandro R, Bellin MD, Kandeel F, Baidal D, Gaglia JL, Posselt AM, Anteby R, Bachul PJ, Al-Salmay Y, Jayant K, Perez-Gutierrez A, Barth RN, Fung JJ, Ricordi C. Islets Transplantation at a Crossroads - Need for Urgent Regulatory Update in the United States: Perspective Presented During the Scientific Sessions 2021 at the American Diabetes Association Congress. Front Endocrinol (Lausanne). 2021; 12:789526.  View on PubMed
  3. Meier RPH, Kelly Y, Yamaguchi S, Braun HJ, Lunow-Luke T, Adelmann D, Niemann C, Maluf DG, Dietch ZC, Stock PG, Kang SM, Feng S, Posselt AM, Gardner JM, Syed SM, Hirose R, Freise CE, Ascher NL, Roberts JP, Roll GR. Advantages and Limitations of Clinical Scores for Donation After Circulatory Death Liver Transplantation. Front Surg. 2021; 8:808733.  View on PubMed
  4. Nathan JD, Yang Y, Eaton A, Witkowski P, Wijkstrom M, Walsh M, Trikudanathan G, Singh VK, Schwarzenberg SJ, Pruett TL, Posselt A, Naziruddin B, Mokshagundam SP, Morgan K, Lara LF, Kirchner V, He J, Gardner TB, Freeman ML, Ellery K, Conwell DL, Chinnakotla S, Beilman GJ, Ahmad S, Abu-El-Haija M, Hodges JS, Bellin MD. Surgical approach and short-term outcomes in adults and children undergoing total pancreatectomy with islet autotransplantation: A report from the Prospective Observational Study of TPIAT. Pancreatology. 2022 Jan; 22(1):1-8.  View on PubMed
  5. Ku E, McCulloch CE, Roll GR, Posselt A, Grimes BA, Johansen KL. Bariatric surgery prior to transplantation and risk of early hospital re-admission, graft failure, or death following kidney transplantation. Am J Transplant. 2021 11; 21(11):3750-3757.  View on PubMed
  6. Lara LF, Wastvedt S, Hodges JS, Witkowski P, Wijkstrom M, Walsh RM, Singh VK, Schwarzenberg SJ, Pruett TL, Posselt A, Naziruddin B, Nathan JD, Morgan KA, Mitchell R, Kirchner VA, Mokshagundam SL, Hatipoglu B, Gardner TB, Freeman ML, Chinnakotla S, Beilman GJ, Abu-El-Haija M, Conwell DL, Bellin MD, POST study consortium. The Association of Smoking and Alcohol Abuse on Anxiety and Depression in Patients With Recurrent Acute or Chronic Pancreatitis Undergoing Total Pancreatectomy and Islet Autotransplantation: A Report From the Prospective Observational Study of TPIAT Cohort. Pancreas. 2021 07 01; 50(6):852-858.  View on PubMed
  7. Witkowski P, Odorico J, Pyda J, Anteby R, Stratta RJ, Schrope BA, Hardy MA, Buse J, Leventhal JR, Cui W, Hussein S, Niederhaus S, Gaglia J, Desai CS, Wijkstrom M, Kandeel F, Bachul PJ, Becker YT, Wang LJ, Robertson RP, Olaitan OK, Kozlowski T, Abrams PL, Josephson MA, Andreoni KA, Harland RC, Kandaswamy R, Posselt AM, Szot GL, Ricordi C. Arguments against the Requirement of a Biological License Application for Human Pancreatic Islets: The Position Statement of the Islets for US Collaborative Presented during the FDA Advisory Committee Meeting. J Clin Med. 2021 Jun 29; 10(13).  View on PubMed
  8. Witkowski P, Wijkstrom M, Bachul PJ, Morgan KA, Levy M, Onaca N, Chaidarun SS, Gardner T, Shapiro AMJ, Posselt A, Ahmad SA, Daffonchio L, Ruffini PA, Bellin MD. Targeting CXCR1/2 in the first multicenter, double-blinded, randomized trial in autologous islet transplant recipients. Am J Transplant. 2021 11; 21(11):3714-3724.  View on PubMed
  9. Sharpton SR, Terrault NA, Tavakol MM, Posselt AM. Sleeve gastrectomy prior to liver transplantation is superior to medical weight loss in reducing posttransplant metabolic complications. Am J Transplant. 2021 10; 21(10):3324-3332.  View on PubMed
  10. Desai CS, Szempruch KR, Vonderau JS, Chetboun M, Pattou F, Coates T, De Paep DL, Hawthorne WJ, Khan KM, de Koning EJP, Naziruddin B, Posselt A, Schrope BA, Wijkstrom M, Witkowski P, Shapiro AMJ. Anticoagulation practices in total pancreatectomy with autologous islet cell transplant patients: an international survey of clinical programs. Transpl Int. 2021 03; 34(3):593-595.  View on PubMed
  11. Vasu S, Yang JM, Hodges J, Abu-El-Haija MA, Adams DB, Balamurugan AN, Beilman GJ, Chinnakotla S, Conwell DL, Freeman ML, Gardner TB, Hatipoglu B, Kirchner V, Lara LF, Morgan KA, Nathan JD, Posselt A, Pruett TL, Schwarzenberg SJ, Singh VK, Wijkstrom M, Witkowski P, Naziruddin B, Bellin MD. Circulating miRNA in Patients Undergoing Total Pancreatectomy and Islet Autotransplantation. Cell Transplant. 2021 Jan-Dec; 30:963689721999330.  View on PubMed
  12. Trikudanathan G, Elmunzer BJ, Yang Y, Abu-El-Haija M, Adams D, Ahmad S, Balamurugan AN, Beilman GJ, Chinnakotla S, Conwell DL, Freeman ML, Gardner TB, Hatipoglu B, Hodges JS, Kirchner V, Lara LF, Long-Simpson L, Mitchell R, Morgan K, Nathan JD, Naziruddin B, Posselt A, Pruett TL, Schwarzenberg SJ, Singh VK, Smith K, Wijkstrom M, Witkowski P, Bellin MD. Preoperative ERCP has no impact on islet yield following total pancreatectomy and islet autotransplantation (TPIAT): Results from the Prospective Observational Study of TPIAT (POST) cohort. Pancreatology. 2021 Jan; 21(1):275-281.  View on PubMed
  13. Syed SM, Gardner J, Roll G, Webber A, Mehta N, Shoji J, Adelmann D, Niemann C, Braun HJ, Mello A, Yao F, Posselt A, Kang SM, Hirose R, Roberts J, Feng S, Ascher N, Stock P, Freise C. COVID-19 and Abdominal Transplant: A Stepwise Approach to Practice During Pandemic Conditions. Transplantation. 2020 11; 104(11):2215-2220.  View on PubMed
  14. Markmann JF, Rickels MR, Eggerman TL, Bridges ND, Lafontant DE, Qidwai J, Foster E, Clarke WR, Kamoun M, Alejandro R, Bellin MD, Chaloner K, Czarniecki CW, Goldstein JS, Hering BJ, Hunsicker LG, Kaufman DB, Korsgren O, Larsen CP, Luo X, Naji A, Oberholzer J, Posselt AM, Ricordi C, Senior PA, Shapiro AMJ, Stock PG, Turgeon NA. Phase 3 trial of human islet-after-kidney transplantation in type 1 diabetes. Am J Transplant. 2021 04; 21(4):1477-1492.  View on PubMed
  15. Wisneski AD, Carter J, Nakakura EK, Posselt A, Rogers SJ, Cello JP, Arain M, Kirkwood KS, Hirose K, Stewart L, Corvera CU. Ampullary stenosis and choledocholithiasis post Roux-En-Y gastric bypass: challenges of biliary access and intervention. HPB (Oxford). 2020 10; 22(10):1496-1503.  View on PubMed
  16. Roll GR, Posselt AM, Freise J, Baird J, Syed S, Mo Kang S, Hirose R, Szot GL, Zarinsefat A, Feng S, Worner G, Sarwal M, Stock PG. Long-term follow-up of beta cell replacement therapy in 10 HIV-infected patients with renal failure secondary to type 1 diabetes mellitus. Am J Transplant. 2020 08; 20(8):2091-2100.  View on PubMed
  17. Diwan TS, Lee TC, Nagai S, Benedetti E, Posselt A, Bumgardner G, Noria S, Whitson BA, Ratner L, Mason D, Friedman J, Woodside KJ, Heimbach J. Obesity, transplantation, and bariatric surgery: An evolving solution for a growing epidemic. Am J Transplant. 2020 08; 20(8):2143-2155.  View on PubMed
  18. Kim TY, Shoback DM, Black DM, Rogers SJ, Stewart L, Carter JT, Posselt AM, King NJ, Schafer AL. Increases in PYY and uncoupling of bone turnover are associated with loss of bone mass after gastric bypass surgery. Bone. 2020 02; 131:115115.  View on PubMed
  19. Lara LF, Bellin MD, Ugbarugba E, Nathan JD, Witkowski P, Wijkstrom M, Steel JL, Smith KD, Singh VK, Schwarzenberg SJ, Pruett TL, Naziruddin B, Long-Simpson L, Kirchner VA, Gardner TB, Freeman ML, Dunn TB, Chinnakotla S, Beilman GJ, Adams DB, Morgan KA, Abu-El-Haija MA, Ahmad S, Posselt AM, Hughes MG, Conwell DL. A Study on the Effect of Patient Characteristics, Geographical Utilization, and Patient Outcomes for Total Pancreatectomy Alone and Total Pancreatectomy With Islet Autotransplantation in Patients With Pancreatitis in the United States. Pancreas. 2019 10; 48(9):1204-1211.  View on PubMed
  20. Sharpton SR, Terrault NA, Posselt AM. Outcomes of Sleeve Gastrectomy in Obese Liver Transplant Candidates. Liver Transpl. 2019 04; 25(4):538-544.  View on PubMed

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