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Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Curr+Mol+Med 2014 ; 14 (5): 690-702 Nephropedia Template TP
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Combination therapy with hepatocyte growth factor and oseltamivir confers enhanced protection against influenza viral pneumonia #MMPMID24894172
Narasaraju T; Yang E; Samy RP; Tan KS; Moorthy AN; Phoon MC; van Rooijen N; Choi HW; Chow VT
Curr Mol Med 2014[]; 14 (5): 690-702 PMID24894172show ga
Frequent outbreaks caused by influenza viruses pose considerable public health threats worldwide. Virus-inflicted alveolar damage represents a major contributor of acute lung injury in influenza. We have previously demonstrated that hepatocyte growth factor (HGF) produced by macrophages enhances alveolar epithelial proliferation during influenza infection. Here, we investigated the therapeutic efficacy of recombinant human HGF (rhHGF) and an antiviral agent (oseltamivir) alone or in combination to treat influenza viral pneumonia in macrophage-depleted BALB/c mice. Combination therapy of infected mice significantly reduced lung pathology and mortality compared to other animal groups that received either treatment alone. Combination treatment with rhHGF induced alveolar type II (AT2) epithelial hyperplasia more prominently in the distal airways, evident by increased cells with double-positive staining for surfactant protein-C and proliferating cell nuclear antigen within the alveolar epithelial lining. Similarly, rhHGF supplementation also induced stem cell antigen-1 (SCA-1) transcriptional expression at 5 days post-infection (dpi), but mRNA levels of both SCA-1 and its receptor c-KIT were decreased by 10 dpi. Microarray and pathway analyses indicated that rhHGF administration may act by accelerating tissue repair and suppressing inflammatory processes to minimize damage by infection and to restore lung function by earlier repair. These results reveal that transient administration of rhHGF may confer synergistic effects in enhancing pulmonary repair by promoting AT2 cell proliferation. Thus, the combination of rhHGF and oseltamivir may represent a promising therapeutic option against influenza pneumonia to improve existing antiviral treatment regimens.