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Racquel Domingo-Gonzalez
e-mail address: rdomingo@umich.edu

Mentor: Bethany Moore, PhD


Research Description

The success of hematopoietic stem cell transplant (HSCT) therapy is severely limited by pulmonary complications, including Pseudomonas aeruginosa and Streptococcus pneumoniae.  We demonstrated that mice which have fully reconstituted their hematopoietic compartment including alveolar macrophages (AMs) post-bone marrow transplantation (BMT) have impaired host defense against the Gram negative pathogen P. aeruginosa.  Impaired innate immunity is related, in part, to increased production of prostaglandin E2 (PGE2) by AMs.  Cyclooxygenase (COX)-2 is the rate-limiting enzyme for synthesis of PGE2 from arachidonic acid, and COX-2 expression is elevated in AMs post-BMT.  Furthermore, we have also observed changes in scavenger receptor profiles which may be affecting macrophage function post-transplant. Alterations in miRNA expression also observed after transplant may explain the changes in scavenger receptor expression. Therefore, we hypothesized that epigenetic mechanisms and miRNA alterations may be responsible for the defect in BMT AMs.

 

Publications

Domingo-Gonzalez R and Moore BB. 2013. Defective pulmonary innate immune responses post-stem cell transplantation; review and results from one model system. Front. Immunol. 4:126.

Domingo-Gonzalez, R, Katz, S, Serezani, CH, Moore, TA, LeVine, AM, Moore, BB. 2013. PGE2-induced changes in alveolar macrophage scavenger receptor profiles differentially alter phagocytosis of P. aeruginosa and S. aureus post-bone marrow transplant. J Immunol. 190(11):5809-17.

Domingo-Gonzalez, R, Huang, SK, Laouar, Y, Wilke, CA and Moore, BB. 2012.COX-2 Expression is Upregulated by DNA Hypomethylation after Hematopoietic Stem Cell Transplantation. J. Immunol. 189(9):4528-36


Abstracts

Domingo-Gonzalez, R, Katz, S, Serezani, CH, Moore, TA, LeVine, AM, Moore, BB. 2013. PGE2-induced changes in alveolar macrophage scavenger receptor profiles differentially alter phagocytosis of P. aeruginosa and S. aureus post-bone marrow transplant. American Association of Immunologists Conference. Honolulu, HI. 2013.

Racquel Domingo-Gonzalez, Steven Huang, Yasmina Laouar, Bethany B. Moore. Hypomethylation of the Cox-2 promoter upregulate COX-2 and PGE2 levels post-bone marrow transplant. American Association of Immunologists Conference. Boston, MA, May 4-8 2012.

Racquel Domingo-Gonzalez, Steven Huang, Bethany Moore. Methylation patterns of Cox-2 promoter affect Cox-2 and PGE2 levels post-bone marrow transplant. Autumn Immunology Conference, Chicago, IL, November 20-23 2011.


Awards

Midwest Affiliate Pre-doctoral Fellowship, American Heart Association, 2013 - 14

Harold and Vivian Shapiro/John Malik/Jean Forrest Award, 2013

The Miller Fund Award for Innovative Immunology Research, 2013

The Monte V. Hobbs Student Award, 2013

Rackham Conference Travel Grant, University of Michigan, 2013

R&D Systems Travel Grant, 2013

FASEB MARC Program Travel Award, American Association of Immunologists Conference, Honolulu, HI, 2013

Rackham Graduate Student Research Grant, University of Michigan, 2012

John Wallace Diversity Award, 2011

Rackham Conference Travel Grant, University of Michigan, 2011





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