Akshay Chauhan, MD
Associate Professor, Surgery-GI, Trauma, and Endocrine Surgery

Recognition & Awards

• Applegate Award, Best Resident Teacher, School of Medicine (2016)
• J Cuthbert Owens Award for excellence in Teaching and Patient care, University of Colorado (2014)
• International Surgical Jeopardy winner, American College of Surgeons (2013)

Research Interests

Teaching

Publications

• Pratap A, Qualman A, Garrett H, Westbrook L, The E, Mitra S, Cordero M, Monge KM, Idrovo JP, Chauhan A, Cheng L, Cohen MJ, Mungo B, Wani S, Meguid RA, McCarter MD, Meng X. Silencing Glypican-1 enhances the antitumor effects of Pictilisib via downregulating PI3K/Akt/ERK signaling in chemo-resistant esophageal adenocarcinoma. Mol Cell Oncol. 2023;10(1):2238873. PubMed PMID: 37649964
• Pratap A, Qualman A, Garrett H, The E, Chauhan A, Idrovo JP, Cheng L, Wani S, Meguid RA, Meng X. Targeting Glypican-1 Reverses Resistance to 5-Fluorouracil in Esophageal Adenocarcinoma Cells. Anticancer Res. 2023 Aug;43(8):3411-3418. PubMed PMID: 37500147
• Gergen AK, Stuart CM, Byers S, Vigneshwar N, Madsen H, Johnson J, Oase K, Garduno N, Marsh M, Pratap A, Mitchell JD, David EA, Randhawa S, Meguid RA, McCarter MD, Stewart CL. ASO Visual Abstract: Prospective Evaluation of a Universally Applied Laparoscopic Gastric Ischemic Preconditioning Protocol Prior to Esophagectomy with Comparison to Historical Controls. Ann Surg Oncol. 2023 Sep;30(9):5828-5829. PubMed PMID: 37355517
• Stuart CM, Gergen AK, Byers S, Vigneshwar N, Madsen H, Johnson J, Oase K, Garduno N, Marsh M, Pratap A, Mitchell JD, David EA, Randhawa SK, Meguid RA, McCarter MD, Stewart CL. ASO Author Reflections: Gastric Ischemic Preconditioning Prior to Esophagectomy: Laparoscopic Gastric Ischemic Preconditioning. Ann Surg Oncol. 2023 Sep;30(9):5826-5827. PubMed PMID: 37294387
• Gergen AK, Stuart CM, Byers S, Vigneshwar N, Madsen H, Johnson J, Oase K, Garduno N, Marsh M, Pratap A, Mitchell JD, David EA, Randhawa S, Meguid RA, McCarter MD, Stewart CL. Prospective Evaluation of a Universally Applied Laparoscopic Gastric Ischemic Preconditioning Protocol Prior to Esophagectomy with Comparison with Historical Controls. Ann Surg Oncol. 2023 Sep;30(9):5815-5825. PubMed PMID: 37285095
• Meyers MH, Swei EC, Tarter W, Schoen J, Rothchild K, Pratap A, Sullivan SA. Factors Associated with Weight Loss After Endoscopic Transoral Outlet Reduction (TORe). J Gastrointest Surg. 2023 Aug;27(8):1587-1593. PubMed PMID: 37237090
• Madsen HJ, Lambert-Kerzner A, Mucharsky E, Gergen AK, Dyas AR, McCarter M, Stewart C, Pratap A, Mitchell J, Randhawa S, Meguid RA. Barriers and Facilitators in Implementation of an Esophagectomy Care Pathway: a Qualitative Analysis. J Gastrointest Surg. 2023 Feb;27(2):213-221. PubMed PMID: 36443554
• 1 Tang Y, Ma J, Zhang H, Ma W, Ma W, O’Keefe TJ, Pratap A, Yamada A, Wang L, Gao Y, Zhang Q and Zhao W: Glucocorticoid receptor regulates the epithelial-mesenchymal transition process through gr/zeb1/e-cad and is involved in breast cancer endocrine drug resistance—a bioinformatics analysis. Translational Cancer Research 12(11): 3129-3146, 2023.
• Gergen AK, Madsen HJ, Li A, Cheng L, Meng X, Fullerton DA, Pratap A, Weyant MJ. Simvastatin Inhibits Histologic Changes Associated with Gastroduodenal Reflux in a Murine Model. Dig Dis Sci. 2022 Jan 10. [Epub ahead of print] PubMed PMID: 35001242
• SLEPT-21-0470R, entitled "Efficacy of Combined Hiatal Hernia Repair and Transoral Incisionless Fundoplication for Giant Paraoesophageal Hernias: Technique and early results
• A NOVEL "TOP DOWN" MEDIASTINOABDOMINAL DISSECTION FOR GIANT COMPLEX PARAESOPHAGEAL HERNIA (GPEH) Akshay Pratap, MD1; Brandon Kassel2; 1University of Colorado; 2Colorado State University
• Madsen HJ, Lambert-Kerzner A, Mucharsky E, Gergen AK, Dyas AR, McCarter M, Stewart C, Pratap A, Mitchell J, Randhawa S, Meguid RA. Barriers and Facilitators in Implementation of an Esophagectomy Care Pathway: a Qualitative Analysis. J Gastrointest Surg. 2022 Nov 28;:1-9. [Epub ahead of print] PubMed PMID: 36443554
• "ALL THAT GLOWS GREEN IS NOT NECESSARILY GREAT": CRITICAL APPRAISAL OF INDOCYANINE GREEN (ICG) PERFUSION ASSESSMENT DURING ROBOTIC ESOPHAGECTOMY Akshay Pratap, MD; Martin D McCarter, MD; John D Mitchell; Robert Meguid, MD; University of Colorado
• Pratap A, Li A, Westbrook L, Gergen AK, Mitra S, Chauhan A, Cheng L, Weyant MJ, McCarter M, Wani S, Meguid RA, Mitchell JD, Cohen M, Fullerton D, Meng X. Glypican 1 promotes proliferation and migration in esophagogastric adenocarcinoma via activating AKT/GSK/ß-catenin pathway. J Gastrointest Oncol. 2022 Oct;13(5):2082-2104. PubMed PMID: 36388647
• Gergen AK, Madsen HJ, Li A, Cheng L, Meng X, Fullerton DA, Pratap A, Weyant MJ. Simvastatin Inhibits Histologic Changes Associated with Gastroduodenal Reflux in a Murine Model. Dig Dis Sci. 2022 Oct;67(10):4732-4741. PubMed PMID: 35001242
• ROBOTIC TRANSVERSUS ABDOMINIS RELEASE FOR COMPLEX PARASTOMAL HERNIA REPAIR: TECHNIQUE AND PEARLS FOR SUCCESSFUL OUTCOME Akshay Pratap, MD1; Brandon Kassel2; Simon Kim, PhD1; Janet Kukreja, MD1; Jon D Vogel1; 1University of Colorado; 2Colorado State University
• Gergen AK, Jarrett MJ, Li A, Meng X, Pratap A, Fullerton DA, Weyant MJ. Toll-like Receptor 4 Mediates Reflux-Induced Inflammation in a Murine Reflux Model. Semin Thorac Cardiovasc Surg. 2022 Winter;34(4):1324-1335. PubMed PMID: 34534678
• Gergen AK, Wagh MS, Menard-Katcher P, Pratap A. Efficacy of Combined Hiatal Hernia Repair and Transoral Incisionless Fundoplication for Giant Paraoesophageal Hernias: Technique and Early Results. Surg Laparosc Endosc Percutan Tech. 2022 Jun 1;32(3):404-408. PubMed PMID: 35648420
• Gergen, A.K., Vigneshewar, N., Oase, K., Garduno, N., Mitchell, J. D., Meguid, R. A., Pratap, A., McCarter, M. D., & Stewart, C. L. Gastric Ischemic Preconditioning Prior to Esophagectomy. “Video Loop” presentation at: Society of American Gastrointestinal and Endoscopic Surgeons. 2022 Mar 16-19. Denver, CO.
• Pratap A, McCarter MD, Watson TJ. Surgical Management of Barrett's-Related Neoplasia. Gastrointest Endosc Clin N Am. 2021 Jan;31(1):205-218. doi: 10.1016/j.giec.2020.09.003. Epub 2020 Oct 24. PMID: 33213796.
• Anna Gergen, Michael J Weyant, Martin McCarter, Akshay Pratap. Mediastinoscopy Assisted Transhiatal Esophagectomy (MATHE) in End-Stage Achalasia and Gastric Bypass: Technique and Early Results. Surgical Laparoscopy and Percutaneous Techniques.
• Gergen AK, Jarrett MJ, Li A, Meng X, Pratap A, Fullerton DA, Weyant MJ. Toll-like Receptor 4 Mediates Reflux-Induced Inflammation in a Murine Reflux Model. Semin Thorac Cardiovasc Surg. 2021 Sep 15. [Epub ahead of print] PubMed PMID: 34534678
• Gergen AK, Weyant MJ, McCarter MD, Pratap A. Mediastinoscopy-assisted Transhiatal Esophagectomy (MATHE) in End-stage Achalasia and Gastric Bypass: Technique and Early Results. Surg Laparosc Endosc Percutan Tech. 2021 Mar 1;31(3):385-388. PubMed PMID: 33655895
• Gergen AK, Frankel JH, Weyant MJ, Pratap A. Comparison of a novel preperitoneal sublay repair with traditional onlay repair of morgagni hernia: a tale of two techniques. J Robot Surg. 2021 Oct;15(5):821-826. PubMed PMID: 33389628
• Gergen AK, Frankel JH, Weyant MJ, Pratap A. A novel technique of robotic preperitoneal approach for Morgagni hernia repair. Asian J Endosc Surg. 2021 Jul;14(3):648-652. PubMed PMID: 33200531
• Pratap A, McCarter MD, Watson TJ. Surgical Management of Barrett's-Related Neoplasia. Gastrointest Endosc Clin N Am. 2021 Jan;31(1):205-218. PubMed PMID: 33213796
• Gergen AK, Frankel JH, Weyant MJ, Pratap A. A novel technique of robotic preperitoneal approach for Morgagni hernia repair. Asian J Endosc Surg. 2020 Nov 16. doi: 10.1111/ases.12897. Epub ahead of print. PMID: 33200531.
• Pratap A, Mungo B, McCarter M. Indocyanine green tattooing for resection of endophytic submucosal lesions at anatomically difficult locations: Broader application of robotic platform. J Minim Access Surg. 2020 Oct-Dec;16(4):438-440. doi: 10.4103/jmas.JMAS_246_19. PMID: 32978357; PMCID: PMC7597865.
• Gergen AK, Frankel JH, Weyant MJ, Pratap A. Comparison of a novel preperitoneal sublay repair with traditional onlay repair of morgagni hernia: a tale of two techniques. J Robot Surg. 2021 Jan 3. doi: 10.1007/s11701-020-01178-0. Epub ahead of print. PMID: 33389628.
• Armijo PR, Hennings D, Leon M, Pratap A, Wheeler A, Oleynikov D. Surgical Management of Gastroesophageal Reflux Disease in Patients with Severe Esophageal Dysmotility. J Gastrointest Surg. 2019 Jan;23(1):36-42. PubMed PMID: 30288691
• Choudhury RA, Hoeltzel G, Prins K, Chow E, Moore HB, Lawson PJ, Yoeli D, Pratap A, Abt PL, Dumon KR, Conzen KD, Nydam TL. Sleeve Gastrectomy Compared with Gastric Bypass for Morbidly Obese Patients with End Stage Renal Disease: a Decision Analysis. J Gastrointest Surg. 2019 May 1. [Epub ahead of print] PubMed PMID: 31044345
• Pratap A, Pokala B, Vargas LM, Oleynikov D, Kothari V. Laparoscopic endoscopic combined surgery for removal of migrated coil after embolization of ruptured splenic artery aneurysm. J Surg Case Rep. 2018 Feb;2018(2):rjx242. PubMed PMID: 29479413
• Armijo P, Pratap A, Wang Y, Shostrom V, Oleynikov D. Robotic ventral hernia repair is not superior to laparoscopic: a national database review. Surg Endosc. 2018 Apr;32(4):1834-1839. PubMed PMID: 29052065
• Pratap A, Oleynikov D, Kothari V. Real time ultrasound guided insertion of Veress needle in obese patients. Ann R Coll Surg Engl. 2018 Feb;100(2):158-159. PubMed PMID: 29022813
• Armijo P, Pratap A, Wang Y, Shostrom V, Oleynikov D. Robotic ventral hernia repair is not superior to laparoscopic: a national database review. Surg Endosc. 2017 Oct 19. [Epub ahead of print] PubMed PMID: 29052065

Professional Memberships

• Society of American Gastrointestinal Endoscopic Surgeons, Member
• American Society of Transplant Surgeons, Member