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2017 ; 8
(24
): 39640-39648
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Pantoprazole blocks the JAK2/STAT3 pathway to alleviate skeletal muscle wasting
in cancer cachexia by inhibiting inflammatory response
#MMPMID28489606
Guo D
; Wang C
; Wang Q
; Qiao Z
; Tang H
Oncotarget
2017[Jun]; 8
(24
): 39640-39648
PMID28489606
show ga
OBJECTIVE: Cancer cachexia is often present in patients with advanced malignant
tumors, and the subsequent body weight reduction results in poor quality of life.
However, there has been no progress in developing effective clinical therapeutic
strategies for skeletal muscle wasting in cancer cachexia. Herein, we explored
the functions of pantoprazole on cancer cachexia skeletal muscle wasting.
METHODS: The mouse colon adenocarcinoma cell line C26 was inoculated in the right
forelimb of male BALB/C mice to establish a cancer cachexia model. The animals
were treated with or without different concentrations of pantoprazole orally, and
the body weight, tumor growth, spontaneous activity, and muscle functions were
determined at various time points. Two weeks later, the levels of serum IL-6 and
TNF-?, the mRNA levels of gastrocnemius JAK2 and STAT3, and the expression levels
of p-JAK2, p-STAT3, Fbx32, and MuRF1 were examined with ELISA assay, qRT-PCR
assay, and Western blotting, respectively. Further studies were performed to
assess the levels of Fbx32 and MuRF1 expression and morphological changes.
RESULTS: Pantoprazole can alleviate cancer cachexia-induced body weight reduction
and inhibit skeletal muscle wasting in a dose-dependent manner. Our results
indicated that pantoprazole treatment can decrease the levels of serum IL-6 and
TNF-? (56.3% and 67.6%, respectively), and inhibit the activation of the
JAK2/STAT3 signaling pathway. Moreover, the expression levels of MuRF1 and Fbx32
were also suppressed after pantoprazole treatment. CONCLUSION: Our findings
suggested that pantoprazole can alleviate cancer cachexia skeletal muscle wasting
by inhibiting the inflammatory response and blocking the JAK2/STAT3 or ubiquitin
proteasome pathway.