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2014 ; 2014
(ä): 901371
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Sunitinib combined with angiotensin-2 type-1 receptor antagonists induces more
necrosis: a murine xenograft model of renal cell carcinoma
#MMPMID24967411
Verhoest G
; Dolley-Hitze T
; Jouan F
; Belaud-Rotureau MA
; Oger E
; Lavenu A
; Bensalah K
; Arlot-Bonnemains Y
; Collet N
; Rioux-Leclercq N
; Vigneau C
Biomed Res Int
2014[]; 2014
(ä): 901371
PMID24967411
show ga
BACKGROUND: Angiotensin-2 type-1 receptor antagonists not are only
antihypertensive drugs but also can inhibit VEGF production. We hypothesised that
adding telmisartan to sunitinib could potentiate the antiangiogenic effects.
MATERIAL AND METHODS: 786-O cell lines were injected in nude mice. After tumor
development, mice were divided into 4 groups: the first was the control group
(DMSO), the second group was treated with sunitinib alone, the third group was
treated with telmisartan alone, and the fourth group was treated with the
combination. Drugs were orally administered every day for four weeks. Animals
were sacrificed after treatment. Blood and tumor tissues were collected for
analysis by immunohistochemistry, Western Blot, and ELISA methods. RESULTS: All
animals developed a ccRCC and ten in each group were treated. Using a kinetic
model, tumors tended to grow slower in the combination group compared to others
(P = 0.06). Compared to sunitinib alone, the addition of telmisartan
significantly increased tissue necrosis (P = 0.038). Central microvascular
density decreased (P = 0.0038) as well as circulating VEGF (P = 0.003). There was
no significant variation in proliferation or apoptosis markers. CONCLUSION: The
combination of sunitinib and telmisartan revealed an enhancement of the blockage
of the VEGF pathway on renal tumor resulting in a decrease in neoangiogenesis and
an increase in necrosis.
|Angiotensin II Type 1 Receptor Blockers/pharmacology
[MESH]