Ragon Institute

Allen Lab

T Cell Immunotherapy, HIV Evolution and Transmission

Lab Overview

Todd dedicated his entire professional career to HIV research and what is now the Ragon Institute.  He was a celebrated scientist, supportive colleague and a wonderful person with a kind heart. In tribute to his life’s work, the Allen Lab continues his research under the direction of Senior Scientist and Acting PI, Christian Boutwell.

The Allen Lab builds on its long-standing interest in T cell responses to HIV to explore novel approaches to engineering human immune cells to more effectively target and eliminate the HIV reservoir. We are also utilizing novel gene-editing approaches to block the transmission of HIV and curtail infection.

The Allen Lab focuses on translating recent successes in CRISPR gene editing and CAR T cell immunotherapies towards developing a functional cure for HIV. Our work leverages an innovative human stem cell–engrafted mouse model capable of supporting robust HIV infection and developing human immune responses to HIV. We are also using this model to decipher the host and viral factors influencing the mucosal transmission of HIV.

Todd Allen, PhD

Principal Investigator

Affiliation

  • Core Member, Ragon Institute of Mass General, MIT, and Harvard
  • Professor of Medicine, Harvard Medical School
  • Investigator, Massachusetts General Hospital

About

Dr. Todd Allen received his Ph.D. in Cellular & Molecular Biology from the University of Wisconsin before joining the Ragon Institute in 2001. He received his undergraduate degree in biochemistry from the University of Waterloo in Ontario, Canada. He was promoted to Professor of Medicine in 2014. He was also an Associate Member of the Broad Institute of MIT and Harvard.

Recognition & Honors

  • Recipient of the prestigious MGH Scholars Award.
  • Named as a Thomas Reuters Highly Cited Researcher in 2015 and 2016, ranking among the top 1% of researchers in Microbiology.

Related Research Foci

  • Mucosal Immunology
  • Infectious Disease Pathogenesis
  • Cancer Immunology
  • CAR-T / CAR-NK Cells
View All +

Related Areas of Study

  • HIV
  • Hepatitis
  • Cancer
  • Graft-vs-Host
View All +

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Latest From The Lab

Todd Allen

Sep 17, 2024 Features

We are deeply saddened to announce the passing of Ragon Institute faculty member Todd M. Allen, PhD, a pioneering researcher in T cell immunotherapy and HIV evolution and transmission. His groundbreaking work on HIV cure research has left an indelible mark on the field and has been an inspiration to many. In addition to his position at the Ragon, […]

When Good T cells Go Bad

Sep 8, 2021 Features

Ragon researchers find impaired T cells precede loss of HIV control. HIV is a master of evading the immune system, using a variety of methods to prevent the body from being able to find and kill it. The vast majority of people living with HIV require daily medication to suppress the virus and therefore prevent […]

Engineered to Fight: Dual CAR T cells show promise against HIV

Jun 3, 2021 Features

A recent study published in the journal Nature Medicine, led by researchers Todd Allen, PhD, a professor of Medicine at Harvard Medical School and Group Leader at the Ragon Institute of Mass General, MIT, and Harvard, and Jim Riley, PhD, a professor of Microbiology in the Perelman School of Medicine at the University of Pennsylvania, […]

Engineered to Fight: Dual CAR T cells show promise against HIV

Aug 31, 2020 Features

Researchers from the Ragon Institute of Mass General, MIT, and Harvard and the Perelman School of Medicine at the University of Pennsylvania developed a new Dual CAR T cell immunotherapy that combats HIV infection in humanized mice. Image: HIV infecting a human cell, courtesy of NIH Image library A recent study published in the journal […]

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Selected Publications

Innate Immune Reconstitution in Humanized Bone Marrow-Liver-Thymus (HuBLT) Mice Governs Adaptive Cellular Immune Function and Responses to HIV-1 Infection.

Garcia-Beltran WF, Claiborne DT, Maldini CR, Phelps M, Vrbanac V, Karpel ME, Krupp KL, Power KA, Boutwell CL, Balazs AB, Tager AM, Altfeld M, Allen TM.

Front Immunol. 2021 May 26;12:667393.

Dual CD4-based CAR T cells with distinct costimulatory domains mitigate HIV pathogenesis in vivo.

Maldini CR, Claiborne DT, Okawa K, Chen T, Dopkin DL, Shan X, Power KA, Trifonova RT, Krupp K, Phelps M, Vrbanac VD, Tanno S, Bateson T, Leslie GJ, Hoxie JA, Boutwell CL, Riley JL, Allen TM.

Nat Med. 2020 Nov;26(11):1776-1787.

November 1, 2020

Gp41-targeted antibodies restore infectivity of a fusion-deficient HIV-1 envelope glycoprotein.

Joshi VR, Newman RM, Pack ML, Power KA, Munro JB, Okawa K, Madani N, Sodroski JG, Schmidt AG, Allen TM.

PLoS Pathog. 2020 May 11;16(5):e1008577

Rapid evolution of HIV-1 to functional CD8+ T cell responses in humanized BLT mice.

Dudek TE, No DC, Seung E, Vrbanac VD, Fadda L, Bhoumik P, Boutwell CL, Power KA, Gladden AD, Battis L, Mellors EF, Tivey TR, Gao X, Altfeld M, Luster AD, Tager AM, Allen TM.

Sci Transl Med. 2012 Jul 18;4(143):143ra98.

Whole genome deep sequencing of HIV-1 reveals the impact of early minor variants upon immune recognition during acute infection

Henn MR, Boutwell CL, Charlebois P, Lennon NJ, Power KA, Macalalad AR, Berlin AM, Malboeuf CM, Ryan EM, Gnerre S, Zody MC, Erlich RL, Green LM, Berical A, Wang Y, Casali M, Streeck H, Bloom AK, Dudek T, Tully D, Newman R, Axten KL, Gladden AD, Battis L, Kemper M, Zeng Q, Shea TP, Gujja S, Zedlack C, Gasser O, Brander C, Hess C, Günthard HF, Brumme ZL, Brumme CJ, Bazner S, Rychert J, Tinsley JP, Mayer KH, Rosenberg E, Pereyra F, Levin JZ, Young SK, Jessen H, Altfeld M, Birren BW, Walker BD, Allen TM.

PLoS Pathog. 2012;8(3):e1002529.

CD8 epitope escape and reversion in acute HCV infection.

Timm J, Lauer GM, Kavanagh DG, Sheridan I, Kim AY, Lucas M, Pillay T, Ouchi K, Reyor LL, Schulze zur Wiesch J, Gandhi RT, Chung RT, Bhardwaj N, Klenerman P, Walker BD, Allen TM.

J Exp Med. 2004 Dec 20;200(12):1593-604.

December 20, 2004

HIV-1 superinfection despite broad CD8+ T-cell responses containing replication of the primary virus.

Altfeld M*, Allen TM*, Yu XG, Johnston MN, Agrawal D, Korber BT, Montefiori DC, O'Connor DH, Davis BT, Lee PK, Maier EL, Harlow J, Goulder PJ, Brander C, Rosenberg ES, Walker BD.

Nature. 2002 Nov 28;420(6914):434-9.

November 28, 2002

Acute phase cytotoxic T lymphocyte escape is a hallmark of simian immunodeficiency virus infection.

O'Connor DH*, Allen TM*, Vogel TU, Jing P, DeSouza IP, Dodds E, Dunphy EJ, Melsaether C, Mothé B, Yamamoto H, Horton H, Wilson N, Hughes AL, Watkins DI.

Nat Med. 2002 May;8(5):493-9.

Lab Members

Christian Boutwell

Senior Scientist and Acting Principal Investigator

Sam Maldonado

Postdoctoral Fellow

Emily Marte

Veterinary Technologist

Andrew Ngo

Research Technician I

Karen Power

Senior Lab Manager

Tatum Sass

Graduate Student

Amit Singh

Postdoctoral Fellow