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University of Massachusetts Medical School

Cellular and Molecular Physiology

2019

Inflammation

Articles 1 - 2 of 2

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Coronary Disease Is Not Associated With Robust Alterations In Inflammatory Gene Expression In Human Epicardial Fat, Timothy P. Fitzgibbons, Nancy Lee, Khanh-Van T. Tran, Sarah M. Nicoloro, Mark Kelly, Stanley Kc Tam, Michael P. Czech Oct 2019

Coronary Disease Is Not Associated With Robust Alterations In Inflammatory Gene Expression In Human Epicardial Fat, Timothy P. Fitzgibbons, Nancy Lee, Khanh-Van T. Tran, Sarah M. Nicoloro, Mark Kelly, Stanley Kc Tam, Michael P. Czech

Open Access Articles

Epicardial adipose tissue (EAT) is the visceral fat depot of the heart. Inflammation of EAT is thought to contribute to coronary artery disease (CAD). Therefore, we hypothesized that the EAT of patients with CAD would have increased inflammatory gene expression compared with controls without CAD. Cardiac surgery patients with (n = 13) or without CAD (n = 13) were consented, and samples of EAT and subcutaneous adipose tissue (SAT) were obtained. Transcriptomic analysis was performed using Affymetrix Human Gene 1.0 ST arrays. Differential expression was defined as a 1.5-fold change (ANOVA P < 0.05). Six hundred ninety-three genes were differentially expressed between SAT and EAT in controls and 805 in cases. Expression of 326 genes was different between EAT of cases and controls; expression of 14 genes was increased in cases, while 312 were increased in controls. Quantitative reverse transcription PCR confirmed that there was no difference in expression of CCL2, CCR2, TNF-alpha, IL-6, IL-8, and PAI1 between groups. Immunohistochemistry showed more macrophages in EAT than SAT, but there was no difference in their number or activation state between groups. In contrast to prior studies, we did not find increased inflammatory gene expression in the EAT of patients with CAD. We conclude that the specific adipose tissue depot, rather than CAD status, is responsible for the majority of differential gene expression.


Mtorc2/Akt Activation In Adipocytes Is Required For Adipose Tissue Inflammation In Tuberculosis, Nuria Martinez, Catherine Y. Cheng, Natkunam Ketheesan, Aidan Cullen, Yuefeng Tang, Josephine Lum, Kim West, Michael Poidinger, David A. Guertin, Amit Singhal, Hardy Kornfeld Jul 2019

Mtorc2/Akt Activation In Adipocytes Is Required For Adipose Tissue Inflammation In Tuberculosis, Nuria Martinez, Catherine Y. Cheng, Natkunam Ketheesan, Aidan Cullen, Yuefeng Tang, Josephine Lum, Kim West, Michael Poidinger, David A. Guertin, Amit Singhal, Hardy Kornfeld

Open Access Articles

BACKGROUND: Mycobacterium tuberculosis has co-evolved with the human host, adapting to exploit the immune system for persistence and transmission. While immunity to tuberculosis (TB) has been intensively studied in the lung and lymphoid system, little is known about the participation of adipose tissues and non-immune cells in the host-pathogen interaction during this systemic disease.

METHODS: C57BL/6J mice were aerosol infected with M. tuberculosis Erdman and presence of the bacteria and the fitness of the white and brown adipose tissues, liver and skeletal muscle were studied compared to uninfected mice.

FINDINGS: M. tuberculosis infection in mice stimulated immune cell infiltration ...