RESUMO
This study aimed to investigate the effects of baldrinal of Valeriana jatamansi on the expression of corticotropin releasing factor (CRF) and tryptophan hydroxylase 1 (TPH1) mRNA and levels of 5-hydroxytryptamine (5-HT) in colon of rats with irritable bowel syndrome (IBS), and to explain its therapeutic mechanism on IBS through 5-HT pathway. Fifty-four male SD rats were randomly divided into 6 groups: blank group, model group, baldrinal high, medium and low dose groups, and pinaverium bromide group, n=9 in each group. The IBS rat models were established by using unpredictable chronic stress for 3 weeks followed by 1-hour acute restraint stress (CAS) after 7 days of rest and independent feeding. CRF expression was detected by IHC-P; TPH1 mRNA expression was detected by using RT-PCR and the 5-HT level was measured by high performance liquid chromatography(HPLC). The results indicated that the method of chronic stress with acute restrain stress method and independent feeding could lead to the increase in expressions of CRF and TPH1 mRNA and levels of 5-HT in IBS rats(P<0.05). The expressions of CRF, TPH1 mRNA and 5-HT in baldrinal groups were significantly lower than those in model group(P<0.05). The experimental results showed that IBS could result in increase in the expressions of CRF, TPH1 mRNA and levels of 5-HT, and the baldrinal of V. jatamansi could improve the symptoms of IBS by reducing the expressions of CRF, TPH1 mRNA and levels of 5-HT in colon of rats.
RESUMO
This study was aimed to establish an HPLC method for simultaneous content determination of valtrate, acevaltrate, and their degradation products, which were baldrinal and 11-ethoxyviburtinal, in Valeriana jatamansi Jones. The separation and quantification of 4 constituents mentioned above were performed on an Agilent ZORBAX SB-C18 (4.6 mm×250 mm, 5 μm). The mobile phase consisted of water (A) - acetonitrile (B) with an optimized gradient program. The flow rate was 1 mL·min-1. The column temperature was set at 25℃. The wavelength was set at 241 nm. And the injection volume was 10μL. The results showed that among 14 different places of V. jatamansi, the 4 contents determined were different. The contents of valtrate, acevaltrate, and baldrinal in the Yunnan Baoshan Mount were the highest. And the content of 11-ethoxyviburtinal was the highest in Yunnan Dali. It was concluded that the method was with good precision, reproducibility and stability. And it was suitable for the determination of 4 valepotriates ingredients in V. jatamansi. It also provided references for the quality control and exploitation of V. jatamansi.