Involvement of agouti-related protein, an endogenous antagonist of hypothalamic melanocortin receptor, in leptin action - Ebihara, K; Ogawa, Y; Katsuura, G; Numata, Y; Masuzaki, H; Satoh, N; Tamaki, M; Yoshioka, T; Hayase, M; Matsuoka, N; Aizawa-Abe, M; Yoshimasa, Y; Nakao, K (Diabetes, 1999)