Henao Tamayo Lab

Our laboratory, as part of the CSU Mycobacteria Research Laboratories, is dedicated to investigating the pathogenesis and immune response to mycobacterial species, specifically M. tuberculosis, M. avium, and M. abscessus, with a primary focus on the immune responses triggered by the infection and with a particular interest in developing and testing vaccines.

Through a team science approach, we aim to improve vaccine regimens and approaches, incorporating environmental parameters, age, and sex differences known to alter the immune response. To investigate the host-pathogen interactions, we use multiparametric and transcriptional (single-cell RNA sequencing and spatial transcriptomics) unbiased analysis of the cells induced after vaccination and infection. We also utilize metabolomics, proteomics and multiple technologies to evaluate mycobacterial replication compounded with data science and modeling to search for biomarkers of protection against disease.

research project

Characterizing Trained Innate Immunity Mediated by AMMO

This NIH/NIAID R01 investigates a protein-free approach that trains innate immunity to protect against hospital-acquired, antibiotic-resistant bacterial and fungal infections. Our lab uses single-cell RNA-seq and ATAC-seq to define immune and epigenetic signatures. Collaborators: USC, Case Western, Radboud University.

research project

Immune Mechanisms of Protection Against Mycobacterium tuberculosis Center (IMPAC-TB)

Multidisciplinary IMPAc-TB teams are studying human and animal samples through computational modeling to identify the key immune responses needed for protection against Mtb, determine immunologic targets that can be used to improve TB vaccine strategies, and assess the impact on nontuberculous mycobacteria on humans relevant immune responses to Mtb infection or TB vaccines.

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research project

Guinea Pigs as an animal model for Nontuberculous Mycobacteria disease

Recent reports indicate a rise in lung infections caused by nontuberculous mycobacteria, with limited treatment options due to the severe side effects of antibiotics and the lack of effective vaccines. With a pressing need for a reliable model for treatment research, we are evaluating the natural susceptibility of guinea pigs to develop disease in response to oral ingestion of NTMs.

research project

SolaVAX-TB/MucosImmune: A Mucosal Vaccine Against Tuberculosis

We developed an inactivated whole-cell Mtb vaccine booster (SolaVAX-Mtb) that can be administered intranasally. Coupling the SolaVAX inactivation technology (CSU collaborator Ray Goodrich) with Mucosimmune (CSU collaborator Steve Dow), our studies have demonstrated the capacity to protect at chronic states of Mtb infection in animal models.

Publications

Engineering internally His-tagged ESX secretion system fusion antigens for tuberculosis nanoparticle vaccines.
Hsu WL, Jiao Y, Huang WC, Tran KN, Troyer BT, Hvasta M, Kuhlman B, Obregon-Henao A, Lovell JF. . J Biol Chem. 2026 Jul 16:113337. doi: 10.1016/j.jbc.2026.113337. Epub ahead of print. PMID: 42463054.

A novel two-hit murine model of inhaled occupational exposure-induced lung disease.
Barahona M, DeBie A, Dean LS, Klemp B, Jones K, Oyewole EO, Wahl M, Pauly M, McDermott C, Salguero FJ, Anderson GB, Henao-Tamayo M, Nordgren TM.  Physiol Rep. 2026 Jul;14(13):e71019. doi: 10.14814/phy2.71019. PMID: 42436598; PMCID: PMC13356278.

B cells and iBALT in TB immunity & pathogenesis.
Dutt TS, Krause R, Hertz D, Henao-Tamayo M, Leslie A, Schneider B. Front Immunol. 2026 Feb 4;17:1743572. doi: 10.3389/fimmu.2026.1743572. PMID: 41716389; PMCID: PMC12913489.

Dose-Dependent Efficacy of a Riboflavin and Ultraviolet Light-Inactivated Whole-Virion SARS-CoV-2 Vaccine in a Hamster Infection Challenge Model.
Altina N, Ragan IK, Arnett KA, Jones S, Glass A, Dutt TS, Obregon-Henao A, Maldonado P, Harris M, Bowen RA, Kruh-Garcia N, Heaslip D, Yonemura S, Henao-Tamayo M, Goodrich RP. Vaccines (Basel). 2026 Jan 27;14(2):121. doi: 10.3390/vaccines14020121. PMID: 41746044; PMCID: PMC12945153.

Immunopathological outcomes are isolate dependent in chronic Mycobacterium avium complex pulmonary disease
Shaw TD, Lam H, Dutt TS, Pearce CM, Alshiraihi I, Obregon-Henao A, Henao-Tamayo M, Maloney Norcross SE, Meibohm B, Jackson M, Gonzalez-Juarrero M. . Dis Model Mech. 2026 Jan 1;19(1):dmm052671. doi: 10.1242/dmm.052671. Epub 2026 Jan 30. PMID: 41537306; PMCID: PMC12893035.

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People

Marcela Henao Tamayo
Marcela Henao Tamayo, M.D., Ph.D.

Lab Principal Investigator [PI]
Associate Department Head for Undergraduate Education
Associate Professor
Director, CSU Flow Cytometry Facility

Pablo Maldonaldo Jr
Pablo Maldonado Jr, Ph.D.

Postdoctoral Fellow

Amanda Hiptas Headshot
Amanda Hitpas, M.S.

Research Associate III
Lab Manager

Dorst Headshot
Dorst

Research Associate I

Hailey Ojeda
Hailey Ojeda

Research Associate I

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Melea Barahona

Graduate Research Assistant

Madeleine D'Arcy Headshot
Madeleine D'Arcy

Accelerated Master's Student

Jenis Baker

Student Researcher

Hailey Briquet

Student Researcher

Lucas Garcia

Student Researcher

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Joshua Halls

Student Researcher

Gabriel Kaliher

Student Volunteer

Lab Outing, Spring 2025

Lab Outing, Summer 2024

Lab Outing, Spring 2021

Marcela Henao-Tamayo & Taru Dutt at a 2017 workshop in Chanakyapuri, India

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contact information

Lab: Microbiology room C210

Office: Microbiology room C221

(970) 491-5357