- ASSISTANT PROFESSOR Medicine, Infectious Diseases
American Board of Internal Medicine
MD, Harvard University Medical School
Residency, Internal Medicine
New York Presbyterian Hospital
Fellowship, Infectious Diseases
NYU Medical Center
Michael Saperstein Medical Scholars Research Fund Award
Grunebaum AIDS Research Fellowship
Conference on Retroviruses and Opportunistic Infections Young Investigator Award
Phi Beta Kappa
Bloch N, O'Brien M, Norton TD, Polsky SB, Bhardwaj N, Landau NR. HIV type 1 infection of plasmacytoid and myeloid dendritic cells is restricted by high levels of SAMHD1 and cannot be counteracted by Vpx. AIDS research and human retroviruses 2014 Feb; 30(2).
Parrish NF, Gao F, Li H, Giorgi EE, Barbian HJ, Parrish EH, Zajic L, Iyer SS, Decker JM, Kumar A, Hora B, Berg A, Cai F, Hopper J, Denny TN, Ding H, Ochsenbauer C, Kappes JC, Galimidi RP, West AP, Bjorkman PJ, Wilen CB, Doms RW, O'Brien M, Bhardwaj N, Borrow P, Haynes BF, Muldoon M, Theiler JP, Korber B, Shaw GM, Hahn BH. Phenotypic properties of transmitted founder HIV-1. Proceedings of the National Academy of Sciences of the United States of America 2013 Apr; 110(17).
O'Brien M, Montenont E, Hu L, Nardi MA, Valdes V, Merolla M, Gettenberg G, Cavanagh K, Aberg JA, Bhardwaj N, Berger JS. Aspirin attenuates platelet activation and immune activation in HIV-1-infected subjects on antiretroviral therapy: a pilot study. Journal of acquired immune deficiency syndromes (1999) 2013 Jul; 63(3).
O'Brien M, Manches O, Bhardwaj N. Plasmacytoid dendritic cells in HIV infection. Advances in experimental medicine and biology 2013; 762.
Miller EA, Spadaccia MR, OʼBrien MP, Rolnitzky L, Sabado R, Manches O, Frleta D, Bhardwaj N. Plasma factors during chronic HIV-1 infection impair IL-12 secretion by myeloid dendritic cells via a virus-independent pathway. Journal of acquired immune deficiency syndromes (1999) 2012 Dec; 61(5).
O'Brien M, Markowitz M. Should we treat acute HIV infection?. Current HIV/AIDS reports 2012 Jun; 9(2).
Sunseri N, O'Brien M, Bhardwaj N, Landau NR. Human immunodeficiency virus type 1 modified to package Simian immunodeficiency virus Vpx efficiently infects macrophages and dendritic cells. Journal of virology 2011 Jul; 85(13).
O'Brien M, Manches O, Sabado RL, Baranda SJ, Wang Y, Marie I, Rolnitzky L, Markowitz M, Margolis DM, Levy D, Bhardwaj N. Spatiotemporal trafficking of HIV in human plasmacytoid dendritic cells defines a persistently IFN-α-producing and partially matured phenotype. The Journal of clinical investigation 2011 Mar; 121(3).
Sabado RL, O'Brien M, Subedi A, Qin L, Hu N, Taylor E, Dibben O, Stacey A, Fellay J, Shianna KV, Siegal F, Shodell M, Shah K, Larsson M, Lifson J, Nadas A, Marmor M, Hutt R, Margolis D, Garmon D, Markowitz M, Valentine F, Borrow P, Bhardwaj N. Evidence of dysregulation of dendritic cells in primary HIV infection. Blood 2010 Nov; 116(19).
Kambugu A, Meya DB, Rhein J, O'Brien M, Janoff EN, Ronald AR, Kamya MR, Mayanja-Kizza H, Sande MA, Bohjanen PR, Boulware DR. Outcomes of cryptococcal meningitis in Uganda before and after the availability of highly active antiretroviral therapy. Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 2008 Jun; 46(11).
Flanagan-Cato LM, King JF, Blechman JG, O'Brien MP. Estrogen reduces cholecystokinin-induced c-Fos expression in the rat brain. Neuroendocrinology 1998 Jun; 67(6).
Physicians and scientists on the faculty of the Icahn School of Medicine at Mount Sinai often interact with pharmaceutical, device and biotechnology companies to improve patient care, develop new therapies and achieve scientific breakthroughs. In order to promote an ethical and transparent environment for conducting research, providing clinical care and teaching, Mount Sinai requires that salaried faculty inform the School of their relationships with such companies.
Dr. O'Brien did not report having any of the following types of financial relationships with industry during 2014 and/or 2015: consulting, scientific advisory board, industry-sponsored lectures, service on Board of Directors, participation on industry-sponsored committees, equity ownership valued at greater than 5% of a publicly traded company or any value in a privately held company. Please note that this information may differ from information posted on corporate sites due to timing or classification differences.
Mount Sinai's faculty policies relating to faculty collaboration with industry are posted on our website. Patients may wish to ask their physician about the activities they perform for companies.
Mount Sinai Health System (MSHS) physicians - including those employed by MSHS - do not always participate in the same health plans in which MSHS hospitals or facilities participate.
Information regarding insurance participation and billing by this physician may be found on this page or obtained by contacting this provider directly.
Insurance plans that the Mount Sinai Health System hospitals or facilities participate in can be found on the Mount Sinai Health System website.