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엽록체 DNA 변이에 기초한 가는기린초(Sedum aizoon)와 기린초(S. kamtschaticum)의 유전적 관계
AMARSANAA GANTSETSEG,조원범,한은경,이정현 한약정보연구회 2020 한약정보연구회지 Vol.8 No.1
Sedum aizoon and S. kamtschaticum have been widely used as useful herbal medical plants, but the relatives have a taxonomic controversy due to their ambiguous morphological boundaries. Thus, at the genetic level, to clarify the taxonomic relationship between the two, we identified the chloroplast DNA haplotypes of 128 individuals from 6 populations in the Korean peninsula. Analyses were based on sequence data from the trnLUAA-trnFGAA, psaI-accD, petN-psbM, and rpl32-trnLUAG regions. The S. aizoon has a total of two haplotypes, while the S. kamtschaticum has a total of five haplotypes. At the species level, S. kamtschaticum harbored relatively higher genetic variation. TCS analysis largely revealed two lineages formed according to each species. However, S. kamtschaticum's haplotype K1 of the Mt. Jiri population was included in S. aizoon lineage. The haplotype K1 was discussed in two aspects: morphological and genetic criteria in the statistical parsimony network. In this regard, we conclude that S. aizoon specialized for the local environment (Mt. Jiri) was convergent with the morphology of the S. kamtschaticum by chance.
AMARSANAA GANTSETSEG,김정현,현창우,한은경,이정현 한국식물분류학회 2022 식물 분류학회지 Vol.52 No.2
Lindera angustifolia is mainly distributed in the temperate climate zone of China but shows an extraordinary distribution, disjunctively isolated on the western coastal islands of Korea. We therefore present the complete chloroplast genome of Korean L. angustifolia. The complete plastome was 152,836 bp in length, with an overall GC content of 39.2%. A large single copy (93,726 bp) and a small single copy (18,946 bp) of the genome were separated by a pair of inverted repeats (20,082 bp). The genome consists of 125 genes, including 81 protein-coding, eight ribosomal RNA, and 36 transfer RNA genes. While five RNA editing genes (psbL, rpl2, ndhB×2, and ndhD) were identified in L. angustifolia from China, the "ndhD" gene was not recognized as an RNA editing site in the corresponding Korean individual. A phylogenetic analysis revealed that Korean L. angustifolia is most closely related to the Chinese L. angustifolia with strong bootstrap support, forming a sister group of L. glauca.
Amarsanaa Gantsetseg,정수영,조원범,한은경,소순구,이정현 한약정보연구회 2020 한약정보연구회지 Vol.8 No.2
Baekdudaegan on the Korean Peninsula is a key ecological axis in Northeast Asia that is linked to the Sihote-Alin of Russia and the Lesser Khingan Range of China. In particular, the Baekdudaegan region occupies an important geographical location where a large number of subarctic plants grow as the southernmost limit line of northern lineage plants. However, the definition of the northern lineage plants is ambiguous, and there is a limit to establishing a conservation strategy that encompasses the Northeast Asian ecological zone. Therefore, in this study, the term “northern lineage plants” of the Korean Peninsula was defined, and a list of plant species according to it was prepared. We propose the term “northern lineage plants” as plants that the southernmost limit of geographic distribution is the Korean Peninsula. The northern lineage plants were found that 616 species of 91 families. The most dominant family was Cyperaceae with 68 species, followed by Asteraceae (Compositae) with 58 species, Ranunculaceae with 41 species, and Rosaceae with 39 species.
Status Quo of Chronic Liver Diseases, including Hepatocellular Carcinoma, in Mongolia
( Amarsanaa Jazag ),( Natsagnyam Puntsagdulam ),( Jigjidsuren Chinburen ) 대한내과학회 2012 The Korean Journal of Internal Medicine Vol.27 No.2
Because Mongolia has much higher liver disease burden than any other regions of the world, it is necessary to provide information on real-time situation of chronic liver disease in Mongolia. In this article, we reviewed studies performed in Mongolia from 2000 to 2011 on seroprevalence of hepatitis B virus (HBV) and hepatitis C virus (HCV) among healthy individuals and patients with chronic liver diseases, and on the practice patterns for the management of liver cirrhosis and hepatocellular carcinoma (HCC). According to previous reports, the seroprevalence of HBV and HCV in general population in Mongolia is very high (11.8% and 15% for HBV and HCV, respectively). Liver cirrhosis is also highly prevalent, and mortality from liver cirrhosis remained high for the past decade (about 30 deaths per 100,000 populations per year). Among patients with cirrhosis, 40% and 39% are positive for HBsAg and anti-HCV, respectively, and 20% are positive for both. The seroprevalence is similar for HCC and more than 90% of HCC patients are positive for either HBV or HCV. The incidence of HCC in Mongolia is currently among the highest in the world. The mortality from HCC is also very high (52.2 deaths per 100,000 persons per year in 2010). Partly due to the lack of established surveillance systems, most cases of HCC are diagnosed at an advanced stage. The mortality from liver cirrhosis and HCC in Mongolia may be reduced by implementation of antiviral therapy program and control of alcohol consumption.
Khulan Amarsanaa,Hye-Ji Kim,Eun-A Ko,Jaemin Jo,Sung-Cherl Jung 한국뇌신경과학회 2021 Experimental Neurobiology Vol.30 No.1
Nobiletin, a polymethoxylated flavonoid found in citrus, has been studied because of its modulatory functions in cellular signaling cascades, and effects to prevent mitochondrial calcium overload and neuronal cell death. Particularly, we previously reported that nobiletin induced changes in the mitochondrial membrane potential through K+ channel regulation, suggesting that nobiletin might exert neuroprotective effects via regulating mitochondrial functions associated with the electron transport chain (ETC) system. This study investigated whether nobiletin regulated mitochondrial dysfunction mediated by ETC system downregulation by inhibiting complex I (CI) and complex III (CIII) in pure mitochondria and the cortical neurons of rats. The results showed that nobiletin significantly reduced mitochondrial reactive oxygen species (ROS) production, inhibited apoptotic signaling, enhanced ATP production and then restored neuronal viability under conditions of CI inhibition, but not CIII inhibition. These effects were attributed to the downregulation of translocation of apoptosis-induced factor (AIF), and the upregulation of CI activity and the expression of antioxidant enzymes such as Nrf2 and HO-1. Together with our previous study, these results indicate that the neuroprotective effects of nobiletin under mitochondrial dysfunction may be associated with its function to activate antioxidant signaling cascades. Our findings suggest the possibility that nobiletin has therapeutic potential in treating oxidative neurological and neurodegenerative diseases mediated by mitochondrial dysfunction.
광촉매 및 다채널 세라믹 정밀여과 혼성공정에 의한 고탁도 원수의 고도정수처리: 유기물의 영향
Bolor Amarsanaa,Jin Yong Park 한국막학회 2011 멤브레인 Vol.21 No.4
For advanced drinking water treatment of high turbidity water, we used the hybrid process that was composed of photocatalyst packing in space of between outside of multi-channel ceramic microfiltration membrane and membrane module inside. Photocatalyst was polypropylene (PP) beads coated TiO2 powder by CVD (chemical vapor deposition) process. Instead of natural organic matters (NOM) and fine inorganic particles in natural water source, standard NOM solution was prepared with humic acid and kaolin. Water-back-flushing of 10 sec was performed per every period of 10 min to minimize membrane fouling. Resistance of membrane fouling (Rf) increased and J decreased as concentration of humic acid changed from 2 mg/L to 10 mg/L, and finally the highest total permeate volume (VT) could be obtained at 2 mg/L. Then, treatment efficiency of turbidity and UV254 absorbance were above 96.4% and 78.9%, respectively. As results of treatment portions by membrane filtration, photocatalyst adsorption, and photo-oxidation in (MF), (MF+ TiO2), (MF+ TiO2+ UV) processes, turbidity was treated little by photocatalyst adsorption, and photo-oxidation. However, treatment portions of UV254 absorbance by adsorption (MF+ TiO2) and photo-oxidation (MF+ TiO2+ UV) at humic acid of 4 mg/L and 6 mg/L were above 9.0, 9.5 and 8.1, 10.9%, respectively.