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2015 ; 6
(38
): 41146-61
Nephropedia Template TP
Shukla SK
; Dasgupta A
; Mehla K
; Gunda V
; Vernucci E
; Souchek J
; Goode G
; King R
; Mishra A
; Rai I
; Nagarajan S
; Chaika NV
; Yu F
; Singh PK
Oncotarget
2015[Dec]; 6
(38
): 41146-61
PMID26510913
show ga
Pancreatic ductal adenocarcinoma (PDAC) is the fourth leading cause of
cancer-related deaths in the US. Cancer-associated cachexia is present in up to
80% of PDAC patients and is associated with aggressive disease and poor
prognosis. In the present studies we evaluated an anti-cancer natural product
silibinin for its effectiveness in targeting pancreatic cancer aggressiveness and
the cachectic properties of pancreatic cancer cells and tumors. Our results
demonstrate that silibinin inhibits pancreatic cancer cell growth in a
dose-dependent manner and reduces glycolytic activity of cancer cells. Our
LC-MS/MS based metabolomics data demonstrates that silibinin treatment induces
global metabolic reprogramming in pancreatic cancer cells. Silibinin treatment
diminishes c-MYC expression, a key regulator of cancer metabolism. Furthermore,
we observed reduced STAT3 signaling in silibinin-treated cancer cells.
Overexpression of constitutively active STAT3 was sufficient to substantially
revert the silibinin-induced downregulation of c-MYC and the metabolic phenotype.
Our in vivo investigations demonstrate that silibinin reduces tumor growth and
proliferation in an orthotopic mouse model of pancreatic cancer and prevents the
loss of body weight and muscle. It also improves physical activity including grip
strength and latency to fall in tumor-bearing mice. In conclusion,
silibinin-induced metabolic reprogramming diminishes cell growth and cachectic
properties of pancreatic cancer cells and animal models.
|*Xenograft Model Antitumor Assays
[MESH]
|Animals
[MESH]
|Antioxidants/pharmacology
[MESH]
|Cachexia/etiology/metabolism/*prevention & control
[MESH]