NDLI: Regulation of systemic and local neutrophil responses by G-CSF during pulmonary Pseudomonas aeruginosa infection

Content Provider	PubMed Central
Author	Gregory, Alyssa D. Hogue, Lisa A. Ferkol, Thomas W. Link, Daniel C.
Copyright Year	2007
Abstract	Granulocyte colony-stimulating factor (G-CSF) regulates the production, maturation, and function of neutrophils. Its expression is often induced during infection, resulting in high concentrations of G-CSF in inflammatory exudates and in the blood, suggesting that it may regulate both local and systemic neutrophil responses. Herein, we characterize the neutrophil response in G-CSFR−/− mice following intratracheal injection with Pseudomonas aeruginosa–laden agarose beads, modeling the pulmonary infection observed in many patients with cystic fibrosis. G-CSFR−/− mice are markedly susceptible to bronchopulmonary P aeruginosa infection, exhibiting decreased survival and bacterial clearance as well as extensive damage to lung tissue. The systemic neutrophil response was mediated primarily by enhanced neutrophil release from the bone marrow rather than increased neutrophil production and was attenuated in G-CSFR−/− mice. Despite normal to increased local production of inflammatory chemokines, neutrophil accumulation into the infected lung of G-CSFR−/− mice was markedly reduced. Moreover, the percentage of apoptotic neutrophils in the lung was elevated, suggesting that G-CSF signals may play an important role in regulating neutrophil survival at the inflammatory site. Collectively, these data provide new evidence that G-CSF signals play important but specific roles in the regulation of the systemic and local neutrophil response following infection.
Related Links	http://dx.doi.org/10.1182/blood-2005-01-015081
Ending Page	3243
Page Count	9
Starting Page	3235
File Format	PDF
ISSN	00064971
e-ISSN	15280020
Journal	Blood
Issue Number	8
Volume Number	109
Language	English
Publisher	American Society of Hematology
Publisher Date	2007-04-15
Access Restriction	Open
Rights Holder	American Society of Hematology
Subject Keyword	Immunology Cell Biology Biochemistry Hematology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Cell Biology Hematology Biochemistry Immunology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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