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In an experimental animal model of a skeletal muscle injury, the administration of an angiotensin receptor blocker significantly improved muscle regeneration and reduced fibrous tissue formation within the injured area
▸ Bedair HS, Karthikeyan T, Quintero A, et al. Angiotensin II receptor blockade administered after injury improves muscle regeneration and decreases fibrosis in normal skeletal muscle. Am J Sports Med 2008;36:1548–54.
Inhibition of fibrosis and improving regeneration after injury in skeletal muscle may be achieved by transforming growth factor β1 antagonists such as angiotensin receptor blockers
In an animal model of a laceration injury of the skeletal muscle, does an angiotensin receptor blocker decrease fibrosis and improve muscle regeneration?
Subjects: 40 mice
Experimental procedure: All the animals underwent bilateral gastrocnemius lacerations and were then assigned randomly to three treatment groups: a control group (CON — tap water), a low-dose angiotensin receptor blocker group (losartan, 0.05 mg/ml, dissolved in tap water and administered enterally) (ARBld), or a high-dose angiotensin receptor blocker group (0.5 mg/ml) (ARBhd). Animals were killed 3 or 5 weeks after injury, and the lacerated muscles were examined histologically for muscle regeneration and fibrosis
Measures of outcome: Muscle regeneration (number of regenerating myofibres within a high power field), area of fibrosis (%) at 3 weeks and 5 weeks
In an experimental animal model of a skeletal muscle injury, the administration of an angiotensin receptor …
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