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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Antinociceptive effects of ginsenosides injected intracerebroventricularly or intrathecally in substance P-induced pain model.

We have examined the effects of several ginsenosides (Rb1, Rb2, Rc, Rd, Re, Rf, Rg1 and Rg3) administered intracerebroventricularly (i.c.v.) or intrathecally (i.t.) on the nociceptive behavior induced by substance P (0.7 microg) injected i.t. Among the several ginsenosides studied, Rb2, Rc, Rd, and Re, but not Rb1, Rf, Rg1 and Rg3, treated i.c.v. (50 microg) attenuated the nociceptive behavior induced by substance P injected i.t. On the other hand, we found that i.t. treatment with 50 microg of Rb1, Rb2, Rd, or Rf effectively attenuated the nociceptive behavior induced by i.t. injected substance P. However, the i.t. treatment with the same doses of Rc, Re, Rg1 or Rg3 was not effective for antagonizing i.t. injected substance P-induced nociceptive behavior. Our results show that ginsenosides Rb2, Rc, Rd, or R2 injected supraspinally exert a antinociceptive effect in the substance P-induced pain model. Furthermore, Rb1, Rb2, Rd, or Rf treated spinally produce antinociception in the substance P-induced pain model.[1]


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