期刊
JOURNAL OF INFLAMMATION-LONDON
卷 11, 期 -, 页码 -出版社
BMC
DOI: 10.1186/1476-9255-11-5
关键词
Streptococcus pneumoniae; Multiple drug resistance; Ampicillin; Azihromycin; Combination therapy; Inflammation
类别
资金
- University Grants Commission, Government of India, New Delhi, India [UGC/561/Jr. Fellow. SC.]
- Department of Science and Technology, Govt. of India
Objectives: Emergence of multidrug resistance among Streptococcus pneumoniae (SP), has limited the available options used to treat infections caused by this organism. The objective of this study was to compare the role of monotherapy and combination therapy with ampicillin (AMP) and azithromycin (AZM) in eradicating bacterial burden and down regulating lung inflammation in a murine experimental pneumococcal infection model. Methods: Balb/C mice were infected with 10(6) CFU of SP. Treatments with intravenous ampicillin (200 mg/kg) and azithromycin (50 mg/kg) either alone or in combination was initiated 18 h post infection, animals were sacrificed from 0 - 6 h after initiation of treatment. AMP and AZM were quantified in serum by microbiological assay. Levels of TNF-alpha, IFN-gamma IL-6, and IL-10 in serum and in lungs, along with myeloperoxidase, inflammatory cell count in broncho alveolar lavage fluid, COX-2 and histopathological changes in lungs were estimated. Results: Combination therapy down regulated lung inflammation and accelerated bacterial clearance. This approach also significantly decreased TNF-alpha, IFN-gamma, IL-6 and increased IL-10 level in serum and lungs along with decreased myeloperoxidase, pulmonary vascular permeability, inflammatory cell numbers and COX-2 levels in lungs. Conclusions: Combinatorial therapy resulted in comparable bactericidal activity against the multi-drug resistant isolate and may represent an alternative dosing strategy, which may help to alleviate problems with pneumococcal pneumonia.
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