Time filter

Source Type

Wang R.,Zhejiang CONBA Pharmaceutical and Drug Research Development Corporation | Wang R.,Zhejiang Key Laboratory for Traditional Chinese Medicine | Kobayashi Y.,The University of Shimane | Lin Y.,Medical Corporation Soujikai | And 9 more authors.
Planta Medica | Year: 2015

An HPLC quantification method for ginkgolic acid derivatives in Ginkgo biloba leaf extracts was developed. Using 13:0 ginkgolic acid as a marker compound, the relative correlation factors of the four other ginkgolic acid derivatives - namely, 15:0 ginkgolic acid, 15:1 ginkgolic acid, 17:1 ginkgolic acid, and 17:2 ginkgolic acid - to 13:0 ginkgolic acid were determined by HPLC and subsequently used for calculating their contents in ten hydro-ethanolic refined extract samples. In other words, the content of 13:0 ginkgolic acid in the extracts was determined using the isolated compound as an external standard. Subsequently the now known concentration of this compound functioned as an internal standard for the quantification of the other four ginkgolic acid derivatives via the described correlation factors. This HPLC method was validated by two independent control measurements, one with an external standard for every individual compound and one based on the present method with the single marker compound alone. The results did not differ significantly in any of the 10 tested extract samples. The protocol presented here thus not only uses the same reference substance for G. biloba extracts as the current Chinese Pharmacopoeia method but also incorporates the advantages of the current European Pharmacopoeia approach. It is simple, reproducible, and can be used to determine the total contents of ginkgolic acid derivatives in G. biloba leaf extracts. © Georg Thieme Verlag KG. Source

Wang R.,Zhejiang CONBA Pharmaceutical and Drug Research Development Corporation | Wang R.,Zhejiang Key Laboratory for Traditional Chinese Medicine | Kobayashi Y.,The University of Shimane | Lin Y.,Medical Corporation Soujikai | And 7 more authors.
Phytomedicine | Year: 2015

In Qinghai Province, the Brassica campestris L. pollen preparation Qianlie Kang Pule'an Tablet (QKPT) is traditionally used for BPH therapy. However, in QKPT the content of supposedly active phytosterols is relatively low at 2.59%, necessitating high doses for successful therapy. Therefore, a phytosterol enriched (4.54%) refined extract of B. campestris pollen (PE) was developed and compared with QKPT in a BPH rat model. Six groups of rats (n = 8 each), namely sham-operated distilled water control, castrated distilled water control, castrated QKPT 2.0 g/kg, castrated PE 0.1 g/kg, castrated PE 0.2 g/kg, and castrated PE 0.4 g/kg, were intragastrically treated with the respective daily doses. Testosterone propionate (0.3 mg/day) was administered to all castrated rats, while the sham-operated group received placebo injections. After 30 days, the animals were sacrificed and prostates as well as seminal vesicles excised and weighted in order to calculate prostate volume index (PVI) as well as prostate index (PI) and seminal vesicle index (SVI), defined as organ weight in g per 100 g body weight. Compared with sham-operated controls, PI (p < 0.01), PVI (p < 0.01), and SVI (p < 0.01) were all significantly increased in all castrated, testosterone treated rats. After treatment with PE at 0.4 and 0.2 g/kg or QKPT at 2.0 g/kg per day, both indices were significantly reduced (p < 0.01) as compared to the castrated distilled water control. For PE at 0.1 g/kg per day only PI was significantly reduced (p < 0.05). At the highest PE concentration of 0.4 g/kg per day both PI and SVI were also significantly reduced when compared to the QKPT group (p < 0.05). Both PE and QKPT demonstrated curative effects against BPH in the applied animal model. In its highest dose at 0.4 g/kg per day, PE was clearly superior to QKPT. © 2014 Elsevier GmbH. Source

He Y.-J.,Medical Corporation Soujikai | Kuchta K.,Japan National Institute of Health Sciences | Lv X.,Medical Corporation Soujikai | Lin Y.,Medical Corporation Soujikai | And 7 more authors.
Zeitschrift fur Naturforschung - Section C Journal of Biosciences | Year: 2015

In order to elucidate the mechanism of action of curcumin against hepatic fibrosis, cultured rat hepatic stellate cells (HSC) (HSC-T6) were incubated with curcumin for 24 h, after which apoptosis was measured by flow-cytome-try. The protein levels of the pro-apoptotic factors Fas and p53b as well as of the anti-apoptotic factor Bcl-2 were monitored by immunocytochemical ABC staining after incubation with curcumin for 24 h. In the case of 20 μM curcumin, not only was the respective apoptosis index increased, but also the abundance of the pro-apoptotic factors Fas and p53 were amplified, whereas that of the anti-apoptotic factor Bcl-2 decreased. All these effects were highly reproducible (P<0.05). Consequently, curcumin has an up-regulating effect on pro-apoptotic factors like Fas and p53 as well as a down-regulating effect of the anti-apoptotic factor Bcl-2, thus inducing apoptosis in HSC. Source

Li S.,Medical Corporation Soujikai | Kuchta K.,University of Leipzig | Kuchta K.,Sanyo | Tamaru N.,Medical Corporation Soujikai | And 7 more authors.
Forschende Komplementarmedizin | Year: 2013

Background: In Western medicine, the application of topical steroids and oral antihistaminic or antiallergic agents is the main treatment option for atopic dermatitis (AD). However, instead of these therapies the disease may remain intractable in some patients, resulting in long-term exposure to these chemical agents and consequently leading to concerns about possible adverse drug reactions. Methods: In the present open-label clinical study, the efficacy and safety of a novel multi component TCM therapy approach for AD was investigated. Therefore, 94 patients received the formula I (10 crude drugs) orally, combined with both the lotion II (7 crude drugs), and the ointment III (8 crude drugs). Each crude drug was extracted with boiling water in a defined manner, concentrated, and reworked into the preparations. Standardized scores were used for evaluating the severities of AD (clinical severity 0-4) and pruritus (pruritus score 0-4). Results: Both scores had significantly improved at the end of a 12 month treatment (P<0.001). Eosinophil ratio and serum IgE levels, which were elevated in AD patients, were significantly reduced at the end of therapy (P<0.01). In 32 of 94 treated patients the condition markedly improved, in 59 cases AD improved, and in 3 patients there was a slight improvement with no case of ineffective treatment. There was no hint of renal or hepatic toxicity or any other adverse effects. Conclusion: The present study confirms that the 3 newly developed herbal TCM combination preparations are clinically efficacious on AD, accomplishing a significant reduction in both clinical and pruritus scores as well as in eosinophil ratios and serum IgE levels. © 2013 S. Karger GmbH, Freiburg. Source

Discover hidden collaborations