Chemotherapy-induced peripheral neuropathy (CIPN) is one of the dose-limiting side effects of cancer chemotherapy. Although the control of CIPN is important, it is difficult to manage with currently available therapeutic drugs. Therefore, there is a need for novel therapeutic agents for treating CIPN. Goshajinkigan (GJG) is a Kampo formula composed of ten crude drugs. While GJG has been used for the treatment of CIPN, the active constituents of GJG and their underlying mechanisms of pharmacological effects are still unknown. Our previous study revealed that repetitive oral administration of the water extract of Plantaginis Semen, a crude drug ingredient of GJG, inhibited the mechanical allodynia induced by an intraperitoneal injection of paclitaxel in mice. To elucidate the active compounds of Plantaginis Semen, activity-guided separation of the water extract of Plantaginis Semen was performed. From the active fraction, four iridoids (1–4) were identified. Repetitive oral administration of aucubin (1) at 100 or 30 mg/kg and 100 mg/kg of the fraction crude 3 [primarily comprised of pedicularis-lactone (3)], showed anti-allodynic activity, suggesting 1 and 3 could be some of the active compounds responsible for the anti-allodynic property of Plantaginis Semen and GJG. Our study establishes that oral administration of 1 has potent anti-allodynic effect in addition to the activity of intraperitoneally administered 1 reported previously. Identification of active anti-allodynic compounds found in Kampo formulations will support the development of novel therapies for the management of CIPN in cancer patients.

/pdf/search-of-anti-allodynic-compounds-from-plantaginis-semen-a-4lmj7z48pk.pdf

Search of anti-allodynic compounds from Plantaginis Semen, a crude drug ingredient of Kampo formula "Goshajinkigan".

A quantitative 1H-NMR method (1H-qNMR) was developed to determine the concentration of acteoside and geniposidic acid in Plantaginis semen, which is an important crude drug for diuretic purposes. The purity of geniposidic acid and acteoside was determined by the ratio of the intensity of the H-3 signal at δ 7.51 ppm or the H-7″ signal at δ 7.58 ppm in methanol-d
 4 to that of a hexamethyldisilane (HMD) signal at 0.04 ppm, respectively. The concentration of HMD was corrected with the International System of Units traceability using potassium hydrogen phthalate of certified reference material grade. The geniposidic acid content in two batches of Plantaginis semen as determined by 1H-qNMR was found to be 0.84 and 1.00 %, and the acteoside content was determined to be 0.80 and 0.93 %. We demonstrated that this method is useful for the quantitative analysis of geniposidic acid and acteoside in Plantainis semen.

Application of a quantitative 1H-NMR (1H-qNMR) method for the determination of geniposidic acid and acteoside in Plantaginis semen.

Drosophila model and network pharmacology to explore novel targets and novel active components of chinese traditional medications for treating kidney stones

Adventitious root culture of Plantago ovata Forssk. as a source of phenylethanoid glycosides

Pharacpgnostical Studies of Plantaginis Herba (13) : Constituents of Seeds of Plantago sp.and commercial Plantago Seeds.

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Pharacpgnostical Studies of Plantaginis Herba (13) : Constituents of Seeds of Plantago sp.and commercial Plantago Seeds.