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Sriram Machineni, M.B.B.S.

Sriram Machineni, M.B.B.S.

Associate Professor, Department of Medicine (Endocrinology)

Area of Research: Improving treatment access for underserved populations, identifying predictors for the variability of response to obesity treatments, and clinical trials of innovative anti-obesity treatments.

Contact Information

347.498.2448smachineni@montefiore.org

Montefiore Medical Center
1180 Morris Park Avenue
Bronx, NY 10461

Research Profiles

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Professional Interests

Dr. Machineni obtained his medical degree from the All India Institute of Medical Sciences in New Delhi, followed by a residency in internal medicine at the State University of New York at Buffalo. He served as chief resident and primary care teaching physician at Buffalo General Hospital. He subsequently completed a clinical and research fellowship in obesity medicine and metabolism at Massachusetts General Hospital/ Harvard Medical School and stayed on as an instructor. Dr. Machineni studied energy balance and body fat regulation in animal models allowing the interpretation of clinical research findings and phenotypes in the context of physiology.

Dr. Machineni moved to the University of North Carolina at Chapel Hill (UNC) to start a clinical obesity program for treatment, education, and pharmaceutical clinical obesity trials. During his term at UNC, he helped create an obesity primary care network in central North Carolina. He was recruited to Montefiore Medical Center to develop a new medical obesity program.

The Fleischer Institute Medical Weight Center at Montefiore Einstein, founded by Dr. Machineni, is designed to support clinical, educational, and research endeavors in the field of obesity medicine. The program leverages individual variations in response to treatments and uses multiple modalities for weight reduction to treat the comorbidities of obesity and improve quality of life. Special programs are available for individuals who need to lose weight to quality for medical and surgical procedures. The Medical Weight Center works closely with the Montefiore bariatric surgery program to offer a broad spectrum of treatment modalities.

Dr. Machineni has clinical expertise in the multidisciplinary management of obesity, anti-obesity medications, and post-bariatric medical complications, including nutritional deficiencies, hypoglycemia, weight regain, malabsorption, and diarrhea. He is among a handful of physicians in the New York area with Castle Connolly Top Doctors designation in obesity medicine.

Selected Publications

1: Garvey WT, Frias JP, Jastreboff AM, le Roux CW, Sattar N, Aizenberg D, Mao H,Zhang S, Ahmad NN, Bunck MC, Benabbad I, Zhang XM; SURMOUNT-2 investigators.Tirzepatide once weekly for the treatment of obesity in people with type 2 diabetes (SURMOUNT-2): a double-blind, randomised, multicentre, placebo-controlled, phase 3 trial. Lancet. 2023 Jun 26:S0140-6736(23)01200-X. doi:10.1016/S0140-6736(23)01200-X. Epub ahead of print. PMID: 37385275.

2: Pagidipati NJ, Mulder H, Chiswell K, Lampron Z, Jones WS, Machineni S,Waitman LR, Mongraw-Chaffin M, Waterman F, Kumar N, Ramasamy A, Smolarz G,Peterson ED, O'Brien E. Evaluation of weight change and cardiometabolic risk factors in a real-world population of US adults with overweight or obesity. PrevMed. 2023 May;170:107496. doi:10.1016/j.ypmed.2023.107496. Epub 2023 Mar 29.PMID: 36997096.

3: Ro SJ, Lackey AR, Aymes SE, McCauley JL, Davis TC, Wang R, Stanley W, Ratner SP, Machineni S, Fiscus LC. Impact of a Community-Based Weight Management Program in a North Carolina Health Care System. Fam Med. 2023 Mar;55(3):189-194.doi: 10.22454/FamMed.2023.603918. Epub 2023 Jan 31. PMID: 36888674.

4: Aronne LJ, Bramblette S, Ingelfinger JR, Jastreboff AM, Machineni S, Massie N, Rosen CJ. When Weight Impacts Health. N Engl J Med. 2023 Jan 12;388(2):e2. doi: 10.1056/NEJMp2215794. PMID: 36630621.

5: Aronne LJ, Bramblette S, Huett-Garcia A, Ingelfinger JR, Jastreboff AM, Machineni S, Massie N, Rosen CJ. Weight and Health - Pathophysiology and Therapies. N Engl J Med. 2022 Dec 15;387(24):e62. doi: 10.1056/NEJMp2214423. PMID: 36516089.

6: le Roux CW, Zhang S, Aronne LJ, Kushner RF, Chao AM, Machineni S, Dunn J, Chigutsa FB, Ahmad NN, Bunck MC. Tirzepatide for the treatment of obesity: Rationale and design of the SURMOUNT clinical development program. Obesity (Silver Spring). 2023 Jan;31(1):96-110. doi: 10.1002/oby.23612. Epub 2022 Dec 7. PMID: 36478180; PMCID: PMC10107501.

7: Bionic Pancreas Research Group; Russell SJ, Beck RW, Damiano ER, El-Khatib FH, Ruedy KJ, Balliro CA, Li Z, Calhoun P, Wadwa RP, Buckingham B, Zhou K,Daniels M, Raskin P, White PC, Lynch J, Pettus J, Hirsch IB, Goland R, Buse JB,Kruger D, Mauras N, Muir A, McGill JB, Cogen F, Weissberg-Benchell J, Sherwood JS, Castellanos LE, Hillard MA, Tuffaha M, Putman MS, Sands MY, Forlenza G, Slover R, Messer LH, Cobry E, Shah VN, Polsky S, Lal R, Ekhlaspour L, Hughes MS, Basina M, Hatipoglu B, Olansky L, Bhangoo A, Forghani N, Kashmiri H, Sutton F, Choudhary A, Penn J, Jafri R, Rayas M, Escaname E, Kerr C, Favela-Prezas R, Boeder S, Trikudanathan S, Williams KM, Leibel N, Kirkman MS, Bergamo K, Klein KR, Dostou JM, Machineni S, Young LA, Diner JC, Bhan A, Jones JK, Benson M, Bird K, Englert K, Permuy J, Cossen K, Felner E, Salam M, Silverstein JM, Adamson S, Cedeno A, Meighan S, Dauber A. Multicenter, Randomized Trial of a Bionic Pancreas in Type 1 Diabetes. N Engl J Med. 2022 Sep 29;387(13):1161-1172. doi: 10.1056/NEJMoa2205225. PMID: 36170500; PMCID: PMC10028490.

8: Perreault L, Davies M, Frias JP, Laursen PN, Lingvay I, Machineni S, Varbo A,Wilding JPH, Wallenstein SOR, le Roux CW. Changes in Glucose Metabolism andGlycemic Status With Once-Weekly Subcutaneous Semaglutide 2.4 mg AmongParticipants With Prediabetes in the STEP Program. Diabetes Care. 2022 Oct1;45(10):2396-2405. doi: 10.2337/dc21-1785. PMID: 35724304; PMCID: PMC9862484.

9: Jastreboff AM, Aronne LJ, Ahmad NN, Wharton S, Connery L, Alves B, Kiyosue A,Zhang S, Liu B, Bunck MC, Stefanski A; SURMOUNT-1 Investigators. TirzepatideOnce Weekly for the Treatment of Obesity. N Engl J Med. 2022 Jul21;387(3):205-216. doi: 10.1056/NEJMoa2206038. Epub 2022 Jun 4. PMID: 35658024.

10: Klein KR, Freeman JLR, Dunn I, Dvergsten C, Kirkman MS, Buse JB, Valcarce C;SimpliciT1 research group. The SimpliciT1 Study: A Randomized, Double-Blind, Placebo-Controlled Phase 1b/2 Adaptive Study of TTP399, a Hepatoselective Glucokinase Activator, for Adjunctive Treatment of Type 1 Diabetes. Diabetes Care. 2021 Apr;44(4):960-968. doi:10.2337/dc20-2684. Epub 2021 Feb 23. PMID:33622669; PMCID: PMC7985421.

11: Melanie Davies, Louise Færch, Ole K Jeppesen, Arash Pakseresht, Sue D Pedersen, Leigh Perreault, Julio Rosenstock, Iichiro Shimomura, Adie Viljoen, Thomas A Wadden, Ildiko Lingvay; STEP 2 Study Group. Semaglutide 2·4 mg once a week in adults with overweight or obesity, and type 2 diabetes (STEP 2): a randomised, double-blind, double-dummy, placebo-controlled, phase 3 trial. Lancet. 2021 Mar 13;397(10278):971-984. PMID: 33667417.

12: Rosman L, Armbruster T, Kyazimzade S, Tugaoen Z, Mazzella AJ, Deyo Z, Walker J, Machineni S, Gehi A. Effect of a virtual self-management intervention for atrial fibrillation during the outbreak of COVID-19. Pacing Clin Electrophysiol. 2021 Mar;44(3):451-461. doi: 10.1111/pace.14188. Epub 2021 Feb 17. PMID: 33565642; PMCID: PMC8014277.

13: Wadden TA, Bailey TS, Billings LK, Davies M, Frias JP, Koroleva A, Lingvay I, O'Neil PM, Rubino DM, Skovgaard D, Wallenstein SOR, Garvey WT; STEP 3 Investigators. Effect of Subcutaneous Semaglutide vs Placebo as an Adjunct to Intensive Behavioral Therapy on Body Weight in Adults With Overweight or Obesity: The STEP 3 Randomized Clinical Trial. JAMA. 2021 Feb 24. PMID: 33625476; PMCID: PMC7905697.

14: Jensen SM, Thompson RE, Machineni S, Overby DW, Farrell TM. Refractory Hypocalcemia Following Stomach Intestinal Pylorus-Sparing Bariatric Surgery and Thyroidectomy: Successful Management With Creation of a Proximal Roux-en-Y Gastric Bypass. Am Surg. 2021 Apr;87(4):576-580. doi: 10.1177/0003134820952427. Epub 2020 Oct 30. PMID: 33125276.

15: Kushner RF, Batsis JA, Butsch WS, Davis N, Golden A, Halperin F, Kidambi S, Machineni S, Novick M, Port A, Rubino DM, Saunders KH, Shapiro Manning L, Soleymani T, Kahan S. Weight History in Clinical Practice: The State of the Science and Future Directions. Obesity (Silver Spring). 2020 Jan;28(1):9-17. doi: 10.1002/oby.22642. PMID: 31858735.

16: Kushner RF, Butsch WS, Kahan S, Machineni S, Cook S, Aronne LJ. Obesity Coverage on Medical Licensing Examinations in the United States. What Is Being Tested? Teach Learn Med. 2017 Apr-Jun;29(2):123-128. doi:10.1080/10401334.2016.1250641. Epub 2016 Dec 29. PMID: 28033472.

17: Carmody JS, Ahmad NN, Machineni S, Lajoie S, Kaplan LM. Weight Loss After RYGB Is Independent of and Complementary to Serotonin 2C Receptor Signaling in Male Mice. Endocrinology. 2015 Sep;156(9):3183-91. doi: 10.1210/en.2015-1226. Epub 2015 Jun 11. PMID: 26066076; PMCID: PMC4541621.

18: Liou AP, Paziuk M, Luevano JM Jr, Machineni S, Turnbaugh PJ, Kaplan LM. Conserved shifts in the gut microbiota due to gastric bypass reduce host weight and adiposity. Sci Transl Med. 2013 Mar 27;5(178):178ra41. doi:10.1126/scitranslmed.3005687. PMID: 23536013; PMCID: PMC3652229.

19: Bose M, Teixeira J, Olivan B, Bawa B, Arias S, Machineni S, Pi-Sunyer FX, Scherer PE, Laferrère B. Weight loss and incretin responsiveness improve glucose control independently after gastric bypass surgery. J Diabetes. 2010 Mar;2(1):47-55. doi: 10.1111/j.1753-0407.2009.00064.x. PMID: 20676394; PMCID: PMC2910618.

20: Bose M, Machineni S, Oliván B, Teixeira J, McGinty JJ, Bawa B, Koshy N, Colarusso A, Laferrère B. Superior appetite hormone profile after equivalent weight loss by gastric bypass compared to gastric banding. Obesity (Silver Spring). 2010 Jun;18(6):1085-91. doi: 10.1038/oby.2009.473. Epub 2010 Jan 7.PMID: 20057364; PMCID: PMC2877144.

In the News

Tirzepatide Has Huge Impact on Weight, Even After Loss From Lifestyle Change

MedPageToday - October 16, 2023

Sriram Machineni, M.B.B.S., comments on the results of a study he co-authored on the effectiveness of a phase III trial for tirzepatide, a weight loss drug, which helped study participants lose a significant amount of weight following a diet and exercise program. Dr. Machineni is associate professor of medicine and director of the Fleischer Institute Medical Weight Center at Einstein and Montefiore.

Additional coverage includes Medscape

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