Title |
Clampdown of inflammation in aging and anticancer therapies by limiting upregulation and activation of GPCR, CXCR4
|
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Published in |
npj Aging, August 2018
|
DOI | 10.1038/s41514-018-0028-0 |
Pubmed ID | |
Authors |
Raji R. Nair, Shreyas V. Madiwale, Deepak Kumar Saini |
Abstract |
One of the major pathological outcomes of DNA damage during aging or anticancer therapy is enhanced inflammation. However, the underlying signaling mechanism that drives this is not well understood. Here, we show that in response to DNA damage, ubiquitously expressed GPCR, CXCR4 is upregulated through the ATM kinase-HIF1α dependent DNA damage response (DDR) signaling, and enhances inflammatory response when activated by its ligand, chemokine CXCL12. A pharmacologically active compound screen revealed that this increased inflammation is dependent on reduction in cAMP levels achieved through activation of Gαi through CXCR4 receptor and PDE4A. Through in vivo analysis in mice where DNA damage was induced by irradiation, we validated that CXCR4 is induced systemically after DNA damage and inhibition of its activity or its induction blocked inflammation as well as tissue injury. We thus report a unique DNA damage-linked inflammatory cascade, which is mediated by expression level changes in a GPCR and can be targeted to counteract inflammation during anticancer therapies as well as aging. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
India | 13 | 54% |
Canada | 1 | 4% |
United States | 1 | 4% |
Unknown | 9 | 38% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 21 | 88% |
Scientists | 1 | 4% |
Practitioners (doctors, other healthcare professionals) | 1 | 4% |
Science communicators (journalists, bloggers, editors) | 1 | 4% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 25 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Master | 4 | 16% |
Professor > Associate Professor | 4 | 16% |
Student > Ph. D. Student | 4 | 16% |
Researcher | 3 | 12% |
Student > Bachelor | 2 | 8% |
Other | 2 | 8% |
Unknown | 6 | 24% |
Readers by discipline | Count | As % |
---|---|---|
Biochemistry, Genetics and Molecular Biology | 8 | 32% |
Medicine and Dentistry | 2 | 8% |
Neuroscience | 2 | 8% |
Pharmacology, Toxicology and Pharmaceutical Science | 1 | 4% |
Immunology and Microbiology | 1 | 4% |
Other | 4 | 16% |
Unknown | 7 | 28% |