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HIF Regulation of Histoplasma Pathogenesis

HIF 对组织胞浆菌发病机制的调节

基本信息

批准号：
10327291
负责人：
GEORGE S. DEEPE
金额：
$ 40.13万
依托单位：
UNIVERSITY OF CINCINNATI
依托单位国家：
美国
项目类别：
财政年份：
2018
资助国家：
美国
起止时间：
2018-02-15 至 2024-01-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/10327291
关键词：
Affect Animals Antifungal Agents Area Autophagocytosis Behavior Biological Biology CD11 Antigens Cell Hypoxia Cell physiology Cells Cellular Metabolic Process Central America Chemicals Data Defect Effector Cell Elements Environment Gene Activation Generations Genetic Transcription Glycine Granulocyte-Macrophage Colony-Stimulating Factor Granuloma Growth Histoplasma Histoplasma capsulatum Histoplasmosis Host Defense Host resistance Human Hypoxia ITGB2 gene Immune Immune response Immunity Immunosuppression Impairment Infection Infection Control Inflammatory Ingestion Innate Immune Response Interferons Interleukin-10 Interleukins Licensing Malignant Neoplasms Mediating Metabolic Metabolism MicroRNAs Mus Mutant Strains Mice Myeloid Cells Natural Immunity Nodal Outcome Pathogenesis Pathology Phagocytes Pharmacology Physiological Positioning Attribute Pre-Clinical Model Predisposition Procollagen-Proline Dioxygenase Production Property Publications Regulation Reporting Respiratory Tract Infections Role Sentinel Signal Transduction Soil South America T-Cell Development TNF gene Testing Therapeutic Work Yeasts adaptive immunity antagonist antimicrobial arm chemokine cytokine dectin 1 fungus in vivo inhibitor insight macrophage metabolic fitness metabolic phenotype microbial monocyte pathogen pathogenic fungus response transcription factor translational impact

项目摘要

Project Summary The dimorphic fungus, Histoplasma capsulatum (Hc), is endemic to the Midwestern and Southeastern US and is the most frequent cause of fungal respiratory infection. Yeast cells thrive in the intracellular environment of macrophages (M) until these phagocytes are activated by cytokines such as interferon- or granulocyte M colony-stimulating factor. The transcriptional elements that license M to promote clearance of the fungus are largely unknown. We have discovered that the transcription factors hypoxia inducing factors (HIF)-1 and -2 calibrate the behavior of M infected with Hc. In a recent publication, we reported that the lack of HIF-1 in M exacerbates infection with Hc by promoting the generation of interleukin (IL)-10. The absence of both HIF-1 and -2 further exaggerates IL-10 production by M. Excessive IL-10 dampens the ability of activating cytokines to arm the anti-Hc function of M. We demonstrate that Hc induces HIFs and that pharmacologically inflating HIF accrual enhances the anti-Hc activity of mouse and human M. These data triggered two hypotheses: 1) HIFs in M are required to temper IL-10 generation, and 2) pharmacologically amplifying expression of HIFs arms M to exert anti-Hc activity. To test these hypotheses, we propose three Specific Aims. Aim 1 will examine the interplay between HIFs and metabolism. Specifically, we will determine if a glycolytic metabolite initiates and tumor necrosis factor- sustains expression of HIFs. We will determine if overproduction of a specific metabolite by infected HIF-deficient cells promotes IL-10 release. Specific Aim 2 will examine how HIFs regulate IL-10. We will determine if miRNA-27a is involved in the generation of IL-10 and if IL-10 modifies the metabolism of HIF- deficient cells. We will test the possibility that a metabolic product regulates the expression of an miRNA that controls the decay of IL-10 transcription. We will ascertain if IL-1receptor antagonist is a downstream effector of IL-10-mediated inhibition of M function. Specific Aim 3 will investigate how pharmacological activation of HIFs promotes the anti-Hc activity of MWe will identify a mechanism and the in vivo effect of these agents. We expect these studies to provide a greater understanding of the regulation of M function in response to Hc.

项目总结

项目成果

期刊论文数量（10）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Crosstalk Between Autophagy and Hypoxia-Inducible Factor-1α in Antifungal Immunity.

DOI：
10.3390/cells9102150
发表时间：
2020-09-23
期刊：
Cells
影响因子：
6
作者：
Quäschling T;Friedrich D;Deepe GS Jr;Rupp J
通讯作者：
Rupp J

Restraint of Fumarate Accrual by HIF-1α Preserves miR-27a-Mediated Limitation of Interleukin 10 during Infection of Macrophages by Histoplasma capsulatum.

DOI：
10.1128/mbio.02710-21
发表时间：
2021-12-21
期刊：
mBio
影响因子：
6.4
作者：
Evans HM;Schultz DF;Boiman AJ;McKell MC;Qualls JE;Deepe GS Jr
通讯作者：
Deepe GS Jr

Regulation of the Mitochondrion-Fatty Acid Axis for the Metabolic Reprogramming of Chlamydia trachomatis during Treatment with β-Lactam Antimicrobials.

DOI：
10.1128/mbio.00023-21
发表时间：
2021-03-30
期刊：
mBio
影响因子：
6.4
作者：
Shima K;Kaufhold I;Eder T;Käding N;Schmidt N;Ogunsulire IM;Deenen R;Köhrer K;Friedrich D;Isay SE;Grebien F;Klinger M;Richer BC;Günther UL;Deepe GS Jr;Rattei T;Rupp J
通讯作者：
Rupp J

Notch regulates Histoplasma capsulatum clearance in mouse lungs during innate and adaptive immune response phases in primary infection.