A Takara reagent kit (Takara, Tokyo, Japan) was used to extract the total RNA [17 (link)]. The RNA was reverse-transcribed into cDNA by using a PrimeScript RT reagent kit (Takara). The expression of ghrelin, GHSR1α, GHSR1β, and mTOR RNA was detected by real-time PCR using a quantitative PCR system (ABI 7300, company, city, state, U.S.A.) with SYBR Premix. After the reaction, real-time PCR amplification and thawing curves were confirmed, and the 2−ΔΔCt values were calculated.
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