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    Randomized Controlled Trial Comparing Standard Triple and Sequential Regimens for Helicobacter pylori Eradication
    (Mongolian National University of Medical Sciences, 2016-11-25) ; ; ; ;
    Objectives: The aim of this study was to compare effectiveness of sequential therapy to the standard triple therapy to eradicate Helicobacter pylori (H. pylori) in Mongolia. Methods: From September 2014 to February 2016, 140 patients with confirmed H. pylori infection (upper gastrointestinal tract (GI) endoscopy, rapid urease test, histology, H. pylori stool antigen test (HpStAg)) randomly received 10 days standard triple therapy (20 mg pantoprazole, 1 g amoxicillin, 500 mg clarithromycin, all twice daily for 10 days; STT group, n = 70), and sequential therapy (20 mg pantoprazole, 1 g amoxicillin twice daily for 5 days followed by 20 mg pantoprazole, 500 mg clarithromycin, 500 mg metronidazole twice daily for 5 days; SQT group, n = 70). Successful eradication therapy for H. pylori infection was defined as a negative HpStAg test 4 weeks after the end of eradication treatment. Results: The eradication rates by intention to treat (ITT) analysis were 71.4% (50/70) and 50% (35/70) in the STT and SQT groups, respectively (p = 0.033). The eradication rates by per-protocol (PP) analysis were 72.5% (50/69) and 51.5% (35/68) in the STT and SQT groups, respectively (p = 0.018). The adverse event rates were 7.6% (5/70) and 18.6% (13/70) in the STT and SQT groups, respectively (p = 0.043). Conclusion: The eradication rate was significantly higher in the STT group compared with the SQT group. But the eradication efficacies of both STT and SQT for H. pylori infection in Mongolia are unacceptable.
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    Assessment of Pharmacological Effects of Mongolian Medicinal Plant Adonis mongolica in Guinea Pigs in vivo and in vitro
    (National Institute of Informatics, 2017-12-01)
    Izumi-Nakaseko Hiroko
    ;
    Li Wei
    ;
    Xin Cao
    ;
    Nakamura Yuji
    ;
    Ando Kentaro
    Background: Adonis mongolica (Ranunculaceae) is one of the endemic plants in Mongolia and has been used as a medicinal herb in Mongolian traditional medicine to treat patients with congestive heart failure showing tachycardia and edema. Although the plant has been empirically used in the last three decades, the precise information regarding its cardiovascular profile is still limited. Methods: We assessed the cardiohemodynamic and electrophysiological profile of the water-soluble extract of A. mongolica using the guinea pig in vivo model (n = 4) and in vitro preparation (n = 5 - 17). In addition, the onset mechanism of the extract-induced effects on the heart rate and blood pressure in vivo (n = 4), and the atrial rate and contractile force in vitro (n = 4 - 5) were pharmacologically analyzed. Results: The extract exerted the positive chronotropic, negative dromotropic, and vasopressor effects in addition to the proarrhythmic action in vivo. Meanwhile, it modestly decreased the atrial rate and aortic tension but increased the atrial contractile force in vitro. The pretreatment of dl-propranolol and prazosin significantly suppressed the positive chronotropic and vasopressor actions induced by the extract in vivo, indicating that the extract increased the sympathetic tone. Also, liquid chromatography-mass spectrometry analysis showed that water-soluble extract of A. mongolica contained eight kinds of cardiac glycosides. Conclusions: These results indicate that cardiac glycosides in the water-soluble extract of A. mongolica may explain currently observed various cardiovascular effects.
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    Initial Trials With Susceptibility-Based and Empiric Anti-H. pylori Therapies in Mongolia
    Background: Mongolia has a high prevalence of Helicobacter pylori infection and gastric cancer. We conducted a prospective, randomized, single-blind study to evaluate the efficacy of common regimens in Mongolia and to obtain specimens for susceptibility testing. Methods: Empiric treatments: 270 patients with confirmed H. pylori infection were randomized to receive 10 days clarithromycin-triple therapy (Clari-TT) (n = 90), modified bismuth quadruple therapy (M-BQT) (n = 90), or sequential therapy (ST) (n = 90). A second group of 46 patients received susceptibility-based Clari-TT. H. pylori was cultured from 131 patients and susceptibility testing was performed. H. pylori eradication was confirmed by stool antigen 4 weeks after the therapy. Results: Intention-to-treat (ITT) analysis cure rates were 71.1% (95% CI = 61.7-80.5%) for Clari-TT, 87.8% (95% CI = 81-94.6%) for M-BQT, 67.8% (95% CI = 58.1-77.5%) for ST vs. 89.1% (95% CI = 86-98.2%) for susceptibility-based Clari-TT. Per-protocol (PP) analysis results for these therapies were 72.7% (63.4-82%), 89.8% (83.5-96.1%), 68.5% (58.8-78.2%), and 97.6% (89.5-99.8%), respectively. Among 131 cultured H. pylori, resistance rates to amoxicillin, clarithromycin, and metronidazole were 8.4, 37.4, and 74%, respectively. Conclusion: In Mongolia, the prevalence of H. pylori resistance is high requiring bismuth quadruple therapy or susceptibility-based therapy to obtain acceptable cure rates.
    Scopus© Citations 12
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    Artemisioside, a new monoterpene glucoside from the aerial parts of Artemisia ordosica (Asteraceae)
    (2010-04) ;
    Densmaa, Dungerdorj
    ;
    Sanjjav, Tsetsegmaa
    ;
    ;
    Kitamura, Chinami
    A new monoterpene glucoside, artemisioside, was isolated from the aerial parts of Artemisia ordosica Krasch. (Asteraceae). The chemical structure was elucidated from physicochemical data and by the application of Klyne's rule.
    Scopus© Citations 8
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    Chemical composition and antimicrobial activity of essential oil from <i>Pyrethrum pulchrum</i> Ledeb.
    (Mongolian Journals Online, 2018-12-28) ; ;
    Voigt, Kerstin
    ;
    Bartram, Stefan
    ;
    Boland, Wilhelm
    Scopus© Citations 2