Karya
Judul/Title Branched-chain amino acids protect against dexamethasone-induced soleus muscle atrophy in rats.
Penulis/Author Daisuke Yamamoto (1); Taiki Maki (2); dr. Elizabeth Henny Herningtyas, M.Si., Ph.D. SpPK(K) (3); Nobuko Ikeshita (4); Hiromi Shibahara (5); Yuka Sugiyama (6); Shiho Nakanishi (7); Keiji Iida (8); Genzo Iguchi (9); Yutaka Takahashi (10); Hidesuke Kaji (11); Kazuo Chihara (12); Yasuhiko Okimura (13)
Tanggal/Date 1 2010
Kata Kunci/Keyword
Abstrak/Abstract We investigated the utility of branched-chain amino acids (BCAA) in dexamethasone-induced muscle atrophy. Dexamethasone (600 microg/kg, intraperitoneally) and/or BCAA (600 mg/kg, orally) were administered for 5 days in rats, and the effect of BCAA on dexamethasone-induced muscle atrophy was evaluated. Dexamethasone decreased total protein concentration of rat soleus muscles. Concomitant administration of BCAA reversed the decrease. Dexamethasone decreased mean cross-sectional area of soleus muscle fibers, which was reversed by BCAA. Dexamethasone increased atrogin-1 expression, which has been reported to play a pivotal role in muscle atrophy. The increased expression of atrogin-1 mRNA was significantly attenuated by BCAA. Furthermore, dexamethasone-induced conversion from microtubule-associated protein 1 light chain 3 (LC3)-I to LC3-II, which is an indicator of autophagy, was blocked by BCAA. These findings suggest that BCAA decreased protein breakdown to prevent muscle atrophy. BCAA administration appears to be useful for prevention of steroid myopathy.
Rumpun Ilmu Bidang Ilmu Kedokteran Lain Yang Belum Tercantum
Bahasa Asli/Original Language English
Level Internasional
Status
Dokumen Karya
No Judul Tipe Dokumen Aksi
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