Faculty ProfilesMa Somsouk, MD, MAS
1001 Potrero Ave, SFGH 5
San Francisco, CA 94110
1. Precision population health. Quality of care for patient populations can be enhanced by embracing health information technology paired with tailored interventions. Dr. Somsouk's research program is funded by CDC, in partnership with the SF Department of Public Health, to examine how patient panel management can be employed to improve the continuum of colorectal cancer screening as a model condition. Randomized designs test health interventions and health economic approaches quantify the value of efficacious activities.
2. Intestinal mucosal biology. The gastrointestinal tract is a major site of disease pathogenesis. One major focus is HIV, quantifying the HIV reservoir and host control. Another focus is targeted interventions to modulate the microbiota. Approaches employed: organoid models, isolation of epithelial cells, lymphocytes, microbiota, and interventional trials such as fecal transplant.
Education and Training
|Location||Degree or Training||Specialty||Date|
|UCSF, Epidemiology and Biostatistics||M.A.S.||2008|
|UCSF, Gastroenterology & Hepatology||Fellowship||2008|
|UCLA-Harbor Medical Center||Residency||2005|
|Harvard Medical School||M.D.||2002|
|Beijing Medical University, Research Scholar||Fellowship||2001|
|Pomona College, Chemistry||B.A.||1997|
HIV reservoir & inflammation, colorectal cancer screening, microbiome dysbiosis & fecal bacteriotherapy, precision population healthAwards and Honors
Dean M. Craig Endowed Chair in Gastrointestinal Medicine, UCSF, 2016
AGA Fellow, American Gastroenterology Association, 2015
Distinction in Mentoring, UCSF Academic Senate Nomination, 2015
Paul Dudley White / Andrew Sellard Fellowship, Harvard, 2001
Magna Cum Laude, Pomona College, 1997
Related Web Sites
- UCSF Helen Diller Cancer Center
- US News & World Reports
- Profile at livercenter.ucsf.edu
- Colon Cancer Screening (Cantonese)
- Colon Cancer Screening (English)
In the News
- Follow-Up Colonoscopy in High Risk Patients Inadequate in Safety-Net Health System (Dec 13, 2016)
- How Gut Microbiota Impacts HIV Disease (Mar 02, 2016)
- Bacteria in our gut affects HIV—is there a solution? (Feb 24, 2016)
|Project Title||Project Number||Fiscal Year|
|Intestinal MAIT Cells in HIV Infection||R01DK108350||2020|
|HIV-Specific T Cell Responses in Rectal Mucosa||R01AI057020||2017|
Lee B, Holt EW, Wong RJ, Sewell JL, Somsouk M, Khalili M, Maher JJ, Tana MM. Race/ethnicity is an independent risk factor for autoimmune hepatitis among the San Francisco underserved. Autoimmunity. 2018 Jun 11; 1-7.
Lidofsky A, Holmes JA, Feeney ER, Kruger AJ, Salloum S, Zheng H, Seguin IS, Altinbas A, Masia R, Corey KE, Gustafson JL, Schaefer EA, Hunt PW, Deeks S, Somsouk M, Chew KW, Chung RT, Alatrakchi N. Macrophage Activation Marker Soluble CD163 is a Dynamic Marker of Liver Fibrogenesis in HIV/HCV Coinfection. J Infect Dis. 2018 Jun 04.
Alsayid M, Singh MH, Issaka R, Laleau V, Day L, Lee J, Allison J, Somsouk M. Yield of Colonoscopy After a Positive Result From a Fecal Immunochemical Test OC-Light. Clin Gastroenterol Hepatol. 2018 Apr 13.
Chitre AS, Kattah MG, Rosli YY, Pao M, Deswal M, Deeks SG, Hunt PW, Abdel-Mohsen M, Montaner LJ, Kim CC, Ma A, Somsouk M, McCune JM. A20 upregulation during treated HIV disease is associated with intestinal epithelial cell recovery and function. PLoS Pathog. 2018 Mar; 14(3):e1006806.
Hogan LE, Vasquez J, Hobbs KS, Hanhauser E, Aguilar-Rodriguez B, Hussien R, Thanh C, Gibson EA, Carvidi AB, Smith LCB, Khan S, Trapecar M, Sanjabi S, Somsouk M, Stoddart CA, Kuritzkes DR, Deeks SG, Henrich TJ. Increased HIV-1 transcriptional activity and infectious burden in peripheral blood and gut-associated CD4+ T cells expressing CD30. PLoS Pathog. 2018 Feb; 14(2):e1006856.
Wen JW, Kohn MA, Wong R, Somsouk M, Khalili M, Maher J, Tana MM. Hospitalizations for Autoimmune Hepatitis Disproportionately Affect Black and Latino Americans. Am J Gastroenterol. 2018 Feb; 113(2):243-253.
Kiniry BE, Hunt PW, Hecht FM, Somsouk M, Deeks SG, Shacklett BL. Differential Expression of CD8+ T Cell Cytotoxic Effector Molecules in Blood and Gastrointestinal Mucosa in HIV-1 Infection. J Immunol. 2018 Mar 01; 200(5):1876-1888.
Issaka RB, Singh MH, Rachocki C, Day LW, Horton C, Somsouk M. Missed Opportunities in Colorectal Cancer Prevention in Patients With Inadequate Bowel Preparations. Clin Gastroenterol Hepatol. 2018 Jan 09.
Hiatt RA, Sibley A, Fejerman L, Glantz S, Nguyen T, Pasick R, Palmer N, Perkins A, Potter MB, Somsouk M, Vargas RA, van 't Veer LJ, Ashworth A. The San Francisco Cancer Initiative: A Community Effort To Reduce The Population Burden Of Cancer. Health Aff (Millwood). 2018 Jan; 37(1):54-61.
Lin D, Soetikno RM, McQuaid K, Pham C, Doan G, Mou S, Shergill AK, Somsouk M, Rouse RV, Kaltenbach T. Risk factors for postpolypectomy bleeding in patients receiving anticoagulation or antiplatelet medications. Gastrointest Endosc. 2018 Apr; 87(4):1106-1113.
Kiniry BE, Li S, Ganesh A, Hunt PW, Somsouk M, Skinner PJ, Deeks SG, Shacklett BL. Detection of HIV-1-specific gastrointestinal tissue resident CD8+ T-cells in chronic infection. Mucosal Immunol. 2017 Nov 15.
Trapecar M, Khan S, Roan NR, Chen TH, Telwatte S, Deswal M, Pao M, Somsouk M, Deeks SG, Hunt PW, Yukl S, Sanjabi S. An Optimized and Validated Method for Isolation and Characterization of Lymphocytes from HIV+ Human Gut Biopsies. AIDS Res Hum Retroviruses. 2017 Nov; 33(S1):S31-S39.
Asmuth DM, Hinkle JE, LaMarca A, Fichtenbaum CJ, Somsouk M, Utay NS, Shaw AL, Petschow BW, Detzel CJ, Weaver EM. Evaluation of oral serum-derived bovine immunoglobulins in HIV-infected patients with chronic idiopathic diarrhea. HIV Clin Trials. 2017 Nov-Dec; 18(5-6):205-213.
Cockerham LR, Yukl SA, Harvill K, Somsouk M, Joshi SK, Sinclair E, Liegler T, Hoh R, Lyons S, Hunt PW, Rupert A, Sereti I, Morcock DR, Rhodes A, Emson C, Hellerstein MK, Estes JD, Lewin S, Deeks SG, Hatano H. A Randomized Controlled Trial of Lisinopril to Decrease Lymphoid Fibrosis in Antiretroviral-Treated, HIV-infected Individuals. Pathog Immun. 2017; 2(3):310-334.
Seang S, Somasunderam A, Nigalye M, Somsouk M, Schacker TW, Sanchez JL, Hunt PW, Utay NS, Lake JE. Circulating LOXL2 Levels Reflect Severity of Intestinal Fibrosis and GALT CD4+ T Lymphocyte Depletion in Treated HIV Infection. Pathog Immun. 2017; 2(2):239-252.
Vujkovic-Cvijin I, Rutishauser RL, Pao M, Hunt PW, Lynch SV, McCune JM, Somsouk M. Limited engraftment of donor microbiome via one-time fecal microbial transplantation in treated HIV-infected individuals. Gut Microbes. 2017 Sep 03; 8(5):440-450.
Khoury G, Fromentin R, Solomon A, Hartogensis W, Killian M, Hoh R, Somsouk M, Hunt PW, Girling V, Sinclair E, Bacchetti P, Anderson JL, Hecht FM, Deeks SG, Cameron PU, Chomont N, Lewin SR. Human Immunodeficiency Virus Persistence and T-Cell Activation in Blood, Rectal, and Lymph Node Tissue in Human Immunodeficiency Virus-Infected Individuals Receiving Suppressive Antiretroviral Therapy. J Infect Dis. 2017 03 15; 215(6):911-919.
Neidleman JA, Chen JC, Kohgadai N, Müller JA, Laustsen A, Thavachelvam K, Jang KS, Stürzel CM, Jones JJ, Ochsenbauer C, Chitre A, Somsouk M, Garcia MM, Smith JF, Greenblatt RM, Münch J, Jakobsen MR, Giudice LC, Greene WC, Roan NR. Mucosal stromal fibroblasts markedly enhance HIV infection of CD4+ T cells. PLoS Pathog. 2017 Feb; 13(2):e1006163.
Issaka RB, Singh MH, Oshima SM, Laleau VJ, Rachocki CD, Chen EH, Day LW, Sarkar U, Somsouk M. Inadequate Utilization of Diagnostic Colonoscopy Following Abnormal FIT Results in an Integrated Safety-Net System. Am J Gastroenterol. 2017 Feb; 112(2):375-382.
Kiniry BE, Ganesh A, Critchfield JW, Hunt PW, Hecht FM, Somsouk M, Deeks SG, Shacklett BL. Predominance of weakly cytotoxic, T-betLowEomesNeg CD8+ T-cells in human gastrointestinal mucosa: implications for HIV infection. Mucosal Immunol. 2017 Jul; 10(4):1008-1020.
Paquin-Proulx D, Ching C, Vujkovic-Cvijin I, Fadrosh D, Loh L, Huang Y, Somsouk M, Lynch SV, Hunt PW, Nixon DF, SenGupta D. Bacteroides are associated with GALT iNKT cell function and reduction of microbial translocation in HIV-1 infection. Mucosal Immunol. 2017 01; 10(1):69-78.
Shergill AK, Conners EE, McQuaid KR, Epstein S, Ryan JC, Shah JN, Inadomi J, Somsouk M. Protective association of colonoscopy against proximal and distal colon cancer and patterns in interval cancer. Gastrointest Endosc. 2015 Sep; 82(3):529-37.e1.
von Stockenstrom S, Odevall L, Lee E, Sinclair E, Bacchetti P, Killian M, Epling L, Shao W, Hoh R, Ho T, Faria NR, Lemey P, Albert J, Hunt P, Loeb L, Pilcher C, Poole L, Hatano H, Somsouk M, Douek D, Boritz E, Deeks SG, Hecht FM, Palmer S. Longitudinal Genetic Characterization Reveals That Cell Proliferation Maintains a Persistent HIV Type 1 DNA Pool During Effective HIV Therapy. J Infect Dis. 2015 Aug 15; 212(4):596-607.
Somsouk M, Estes JD, Deleage C, Dunham RM, Albright R, Inadomi JM, Martin JN, Deeks SG, McCune JM, Hunt PW. Gut epithelial barrier and systemic inflammation during chronic HIV infection. AIDS. 2015 Jan 02; 29(1):43-51.
Somsouk M, Dunham RM, Cohen M, Albright R, Abdel-Mohsen M, Liegler T, Lifson J, Piatak M, Gorelick R, Huang Y, Wu Y, Hsue PY, Martin JN, Deeks SG, McCune JM, Hunt PW. The immunologic effects of mesalamine in treated HIV-infected individuals with incomplete CD4+ T cell recovery: a randomized crossover trial. PLoS One. 2014; 9(12):e116306.
Sanchez JL, Hunt PW, Reilly CS, Hatano H, Beilman GJ, Khoruts A, Jasurda JS, Somsouk M, Thorkelson A, Russ S, Anderson J, Deeks SG, Schacker TW. Lymphoid fibrosis occurs in long-term nonprogressors and persists with antiretroviral therapy but may be reversible with curative interventions. J Infect Dis. 2015 Apr 01; 211(7):1068-75.
Ribeiro SP, Milush JM, Cunha-Neto E, Kallas EG, Kalil J, Somsouk M, Hunt PW, Deeks SG, Nixon DF, SenGupta D. The CD8? memory stem T cell (T(SCM)) subset is associated with improved prognosis in chronic HIV-1 infection. J Virol. 2014 Dec; 88(23):13836-44.
Serrano-Villar S, Sainz T, Lee SA, Hunt PW, Sinclair E, Shacklett BL, Ferre AL, Hayes TL, Somsouk M, Hsue PY, Van Natta ML, Meinert CL, Lederman MM, Hatano H, Jain V, Huang Y, Hecht FM, Martin JN, McCune JM, Moreno S, Deeks SG. HIV-infected individuals with low CD4/CD8 ratio despite effective antiretroviral therapy exhibit altered T cell subsets, heightened CD8+ T cell activation, and increased risk of non-AIDS morbidity and mortality. PLoS Pathog. 2014 May; 10(5):e1004078.
Somsouk M, To'o K, Ali M, Vittinghoff E, Yeh BM, Yee J, Monto A, Inadomi JM, Aslam R. Esophageal varices on computed tomography and subsequent variceal hemorrhage. Abdom Imaging. 2014 Apr; 39(2):251-6.
Gupta S, Sussman DA, Doubeni CA, Anderson DS, Day L, Deshpande AR, Elmunzer BJ, Laiyemo AO, Mendez J, Somsouk M, Allison J, Bhuket T, Geng Z, Green BB, Itzkowitz SH, Martinez ME. Challenges and possible solutions to colorectal cancer screening for the underserved. J Natl Cancer Inst. 2014 Apr; 106(4):dju032.
Dunham RM, Vujkovic-Cvijin I, Yukl SA, Broadhurst MJ, Loke P, Albright RG, Wong JK, Lederman MM, Somsouk M, Hunt PW, Martin JN, Deeks SG, McCune JM. Discordance between peripheral and colonic markers of inflammation during suppressive ART. J Acquir Immune Defic Syndr. 2014 Feb 01; 65(2):133-41.
Yukl SA, Sinclair E, Somsouk M, Hunt PW, Epling L, Killian M, Girling V, Li P, Havlir DV, Deeks SG, Wong JK, Hatano H. A comparison of methods for measuring rectal HIV levels suggests that HIV DNA resides in cells other than CD4+ T cells, including myeloid cells. AIDS. 2014 Jan 28; 28(3):439-42.
Josefsson L, von Stockenstrom S, Faria NR, Sinclair E, Bacchetti P, Killian M, Epling L, Tan A, Ho T, Lemey P, Shao W, Hunt PW, Somsouk M, Wylie W, Douek DC, Loeb L, Custer J, Hoh R, Poole L, Deeks SG, Hecht F, Palmer S. The HIV-1 reservoir in eight patients on long-term suppressive antiretroviral therapy is stable with few genetic changes over time. Proc Natl Acad Sci U S A. 2013 Dec 17; 110(51):E4987-96.
Hatano H, Yukl SA, Ferre AL, Graf EH, Somsouk M, Sinclair E, Abdel-Mohsen M, Liegler T, Harvill K, Hoh R, Palmer S, Bacchetti P, Hunt PW, Martin JN, McCune JM, Tracy RP, Busch MP, O'Doherty U, Shacklett BL, Wong JK, Deeks SG. Prospective antiretroviral treatment of asymptomatic, HIV-1 infected controllers. PLoS Pathog. 2013; 9(10):e1003691.
Hatano H, Somsouk M, Sinclair E, Harvill K, Gilman L, Cohen M, Hoh R, Hunt PW, Martin JN, Wong JK, Deeks SG, Yukl SA. Comparison of HIV DNA and RNA in gut-associated lymphoid tissue of HIV-infected controllers and noncontrollers. AIDS. 2013 Sep 10; 27(14):2255-60.
Vujkovic-Cvijin I, Dunham RM, Iwai S, Maher MC, Albright RG, Broadhurst MJ, Hernandez RD, Lederman MM, Huang Y, Somsouk M, Deeks SG, Hunt PW, Lynch SV, McCune JM. Dysbiosis of the gut microbiota is associated with HIV disease progression and tryptophan catabolism. Sci Transl Med. 2013 Jul 10; 5(193):193ra91.
Hunt PW, Shulman NS, Hayes TL, Dahl V, Somsouk M, Funderburg NT, McLaughlin B, Landay AL, Adeyemi O, Gilman LE, Clagett B, Rodriguez B, Martin JN, Schacker TW, Shacklett BL, Palmer S, Lederman MM, Deeks SG. The immunologic effects of maraviroc intensification in treated HIV-infected individuals with incomplete CD4+ T-cell recovery: a randomized trial. Blood. 2013 Jun 06; 121(23):4635-46.
Eriksson S, Graf EH, Dahl V, Strain MC, Yukl SA, Lysenko ES, Bosch RJ, Lai J, Chioma S, Emad F, Abdel-Mohsen M, Hoh R, Hecht F, Hunt P, Somsouk M, Wong J, Johnston R, Siliciano RF, Richman DD, O'Doherty U, Palmer S, Deeks SG, Siliciano JD. Comparative analysis of measures of viral reservoirs in HIV-1 eradication studies. PLoS Pathog. 2013 Feb; 9(2):e1003174.
Leeansyah E, Ganesh A, Quigley MF, Sönnerborg A, Andersson J, Hunt PW, Somsouk M, Deeks SG, Martin JN, Moll M, Shacklett BL, Sandberg JK. Activation, exhaustion, and persistent decline of the antimicrobial MR1-restricted MAIT-cell population in chronic HIV-1 infection. Blood. 2013 Feb 14; 121(7):1124-35.
Shaw JM, Hunt PW, Critchfield JW, McConnell DH, Garcia JC, Pollard RB, Somsouk M, Deeks SG, Shacklett BL. Short communication: HIV+ viremic slow progressors maintain low regulatory T cell numbers in rectal mucosa but exhibit high T cell activation. AIDS Res Hum Retroviruses. 2013 Jan; 29(1):172-7.
Inadomi JM, Vijan S, Janz NK, Fagerlin A, Thomas JP, Lin YV, Muñoz R, Lau C, Somsouk M, El-Nachef N, Hayward RA. Adherence to colorectal cancer screening: a randomized clinical trial of competing strategies. Arch Intern Med. 2012 Apr 09; 172(7):575-82.
Shaw JM, Hunt PW, Critchfield JW, McConnell DH, Garcia JC, Pollard RB, Somsouk M, Deeks SG, Shacklett BL. Increased frequency of regulatory T cells accompanies increased immune activation in rectal mucosae of HIV-positive noncontrollers. J Virol. 2011 Nov; 85(21):11422-34.
Somsouk M, Kornfield R, Vittinghoff E, Inadomi JM, Biggins SW. Moderate ascites identifies patients with low model for end-stage liver disease scores awaiting liver transplantation who have a high mortality risk. Liver Transpl. 2011 Feb; 17(2):129-36.
Somsouk M, Guy J, Biggins SW, Vittinghoff E, Kohn MA, Inadomi JM. Ascites improves upon [corrected] serum sodium plus [corrected] model for end-stage liver disease (MELD) for predicting mortality in patients with advanced liver disease. Aliment Pharmacol Ther. 2009 Oct; 30(7):741-8.
Guy J, Somsouk M, Shiboski S, Kerlan R, Inadomi JM, Biggins SW. New model for end stage liver disease improves prognostic capability after transjugular intrahepatic portosystemic shunt. Clin Gastroenterol Hepatol. 2009 Nov; 7(11):1236-40.
Somsouk M, Langfield DE, Inadomi JM, Yee HF. A cost-identification analysis of screening and surveillance of hepatitis C infection in a prospective cohort of dialysis patients. Dig Dis Sci. 2008 Apr; 53(4):1093-9.
Steinmetz WE, Sparrow A, Somsouk M. Determination of the three-dimensional, solution-phase structure of the macrolide antibiotic oxolide in CD2Cl2 and D2O from NMR constraints. Magn Reson Chem. 2005 Jan; 43(1):16-20.
Delgado-Borrego A, Casson D, Schoenfeld D, Somsouk M, Terella A, Jordan SH, Bhan A, Baid S, Cosimi AB, Pascual M, Chung RT. Hepatitis C virus is independently associated with increased insulin resistance after liver transplantation. Transplantation. 2004 Mar 15; 77(5):703-10.
Heckman CA, Cao T, Somsouk L, Duan H, Mehew JW, Zhang CY, Boxer LM. Critical elements of the immunoglobulin heavy chain gene enhancers for deregulated expression of bcl-2. Cancer Res. 2003 Oct 15; 63(20):6666-73.
Somsouk M, Lauer GM, Casson D, Terella A, Day CL, Walker BD, Chung RT. Spontaneous resolution of chronic hepatitis C virus disease after withdrawal of immunosuppression. Gastroenterology. 2003 Jun; 124(7):1946-9.
Bouziane M, Miao F, Bates SE, Somsouk L, Sang BC, Denissenko M, O'Connor TR. Promoter structure and cell cycle dependent expression of the human methylpurine-DNA glycosylase gene. Mutat Res. 2000 Sep 15; 461(1):15-29.
Frank G, Qiu J, Somsouk M, Weng Y, Somsouk L, Nolan JP, Shen B. Partial functional deficiency of E160D flap endonuclease-1 mutant in vitro and in vivo is due to defective cleavage of DNA substrates. J Biol Chem. 1998 Dec 04; 273(49):33064-72.