蛋白质Wnt3能帮助大脑重返年轻

Reduction in paracrine Wnt3 factors during aging causes impaired adult neurogenesis

Masahiro Okamoto, Koshiro Inoue, Hiroki Iwamura, Kazuyuki Terashima, Hideaki Soya, Makoto Asashima and Tomoko Kuwabara

Many persistent pain states (pain lasting for hours, days, or longer) are poorly treated because of the limitations of existing therapies. Analgesics such as nonsteroidal anti-inflammatory drugs and opioids often provide incomplete pain relief and prolonged use results in the development of severe side effects. Identification of the key mediators of various types of pain could improve such therapies. Here, we tested the hypothesis that hitherto unrecognized cytokines and chemokines might act as mediators in inflammatory pain. We used ultraviolet B (UVB) irradiation to induce persistent, abnormal sensitivity to pain in humans and rats. The expression of more than 90 different inflammatory mediators was measured in treated skin at the peak of UVB-induced hypersensitivity with custom-made