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산약의 항당뇨 특성 연구(2) -NGF 유도 신경병증예방-
강동호 ( Tong Ho Kang ),최상진 ( Sang Zin Choi ),이태호 ( Tae Ho Lee ),손미원 ( Mi Won Son ),박지호 ( Ji Ho Park ),김선여 ( Sun Yeou Kim ) 한국식품영양학회 2008 韓國食品營養學會誌 Vol.21 No.4
The main cause of diabetic neuropathy, one of the most debilitating complications, is the chronic hyperglycemia, the increase sorbitol or the decrease of nerve growth factor(NGF). NGF, a protein, plays a major role in the development and maintenance of peripheral nervous system. Systemic administration of NGF prevents manifestations of neuropathy in rodent models of diabetic neuropathy. In the previous investigation, we report the hypoglycemia effect of Dioscorea rhizoma extract(DRE) in diabetic mice. The present study shows protective effect of DRE on diabetic neuropathy by induction of NGF protein. We investigated the NGF level in salivary gland and sciatic nerve of normal mouse and the effect of DRE on sciatic nerve conductivity and thermal hyperalgesia test in Type 2 db/db mouse. DRE increased endogenous NGF level in salivary gland and sciatic nerve of mouse. And sensory nerve conductivity velocity(SNCV), motor nerve conductivity velocity(MNCV) and thermal hyperalgesia increased in DRE treatment mice compared with control group. On the basis of our results, we conclude that DRE increase induction of endogenous NGF level and have protective effect on diabetic neuropathy by induction of NGF. Therefore, we propose that long-term use of DRE might help prevention of diabetes-associated complication; diabetic neuropathy.
Phenolic Glycosides from the Twigs of <i>Salix glandulosa</i>
Kim, Chung Sub,Kwon, Oh Wook,Kim, Sun Yeou,Choi, Sang Un,Kim, Jae Yoon,Han, Ji Young,Choi, Soo Im,Choi, Jong Gil,Kim, Ki Hyun,Lee, Kang Ro American Chemical Society and American Society of 2014 Journal of natural products Vol.77 No.8
<P>As a part of an ongoing search for bioactive constituents from Korean medicinal plants, the phytochemical investigations of the twigs of <I>Salix glandulosa</I> afforded 12 new phenolic glycosides (<B>1</B>–<B>12</B>) and a known analogue (<B>13</B>). The structures of <B>1</B>–<B>13</B> were characterized by a combination of NMR methods (<SUP>1</SUP>H and <SUP>13</SUP>C NMR, <SUP>1</SUP>H–<SUP>1</SUP>H COSY, HMQC, and HMBC), chemical hydrolysis, and GC/MS. The absolute configuration of <B>13</B> [(1<I>R</I>,2<I>S</I>)-2-hydroxycyclohexyl-2′-<I>O</I>-<I>trans</I>-<I>p</I>-coumaroyl-β-<SMALL>d</SMALL>-glucopyranoside] was determined for the first time. Compounds <B>1</B>–<B>3</B>, <B>6</B>, and <B>7</B> exhibited inhibitory effects on nitric oxide production in lipopolysaccharide-activated murine microglial cells (IC<SUB>50</SUB> values in the range 6.6–20.5 μM).</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jnprdf/2014/jnprdf.2014.77.issue-8/np500488v/production/images/medium/np-2014-00488v_0003.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/np500488v'>ACS Electronic Supporting Info</A></P>
Kang, Tong Ho,Moon, Eunjung,Hong, Bin Na,Choi, Sang Zin,Son, Miwon,Park, Ji-Ho,Kim, Sun Yeou Pharmaceutical Society of Japan 2011 Biological & pharmaceutical bulletin Vol.34 No.9
<P>Diabetic neuropathy is characterized by axonal degeneration, demyelination, and atrophy in association with failed axonal regeneration, remyelination, and synaptogenesis. Recent reports suggest that reduced levels of nerve growth factor (NGF) may play a significant role in the pathogenesis of diabetic polyneuropathy. In this study, we investigated the regulation of NGF by steroid diosgenin (DG) in a diabetic neuropathy rodent model. We found that DG, the primary spirostane-type steroid in several <I>Dioscorea</I> species, increased NGF levels in the sciatic nerve of diabetic rats. Additionally, DG increased neurite outgrowth in PC12 cells and enhanced nerve conduction velocities in the diabetic neuropathy mouse model. DG-treated diabetic mice showed reduced disarrangement of the myelin sheath and increased area of myelinated axons by electron microscope studies and exhibited improvement in the damaged axons. Our data further suggest that DG increased the nerve conduction velocity through induction of NGF. Thus, our findings indicate that DG, a major sapogenin obtained from <I>Dioscorea nipponica</I>, reverses functional and ultrastructural changes and induces neural regeneration in a diabetic neuropathy model.</P>
마가목 및 현지초 추출물의 골손실 및 연골손상 억제효과
문은정(Moon, Eun-Jung),윤유석(Youn, You-Suk),최보윤(Choi, Bo-Yun),정현욱(Jeong, Hyun-Uk),박지호(Park, Ji-Ho),오명숙(Oh, Myung-Sook),소윤조(Soh, Yun-Jo),김선여(Kim, Sun-Yeou) 한국산학기술학회 2010 한국산학기술학회논문지 Vol.11 No.9
본 연구에서는 마가목 (SC), 현지초 추출물 (GT) 및 이들의 1:1 혼합물 시료 (MIX)가 골손실 및 연골손상 억제에 효과가 있는지 알아보기 위해, 각각의 시료를 조골세포주인 MG-63 세포, 파골세포로의 분화를 유도한 Raw264.7 세포와 연골세포로의 분화를 유도한 ATDC5 세포에 처리하여 세포분화 조절 정도를 확인하였다. 각 세포 의 분화 정도는 alkaline phosphatase (ALP) 활성 측정, tartrate-resistant acid phosphatase (TRAP) 염색법 및 alcian-blue 염색법으로 확인하였다. 이들 시료는 MG-63 세포에서 ALP 활성에는 영향을 미치지 않았으나, 마가목 추 출물 (SC) 및 마가목과 현지초 추출물의 혼합시료 (MIX)는 농도 의존적으로 파골세포의 분화를 억제하고 연골세포 의 분화를 촉진하는 것으로 나타났다. 이상의 결과를 종합하여 볼 때, 마가목과 현지초는 골손실과 연골 손상으로부 터 보호할 수 있는 중요한 천연물 소재임을 확인할 수 있었다. 나아가 이들 추출물의 작용기전 및 활성물질 구명에 대한 연구는 추후 더 진행되어야 할 것이다. This study was carried out to investigate the effect of Sorbus commixta (SC), Geranium thunbergii (GT) and their mixture (SC:GT=1:1, MIX) on inhibition of bone loss and chondral defect. To examine their activities, we measured the alkaline phosphatase (ALP) activity in human osteoblast-like MG-63 cells and performed tartrate-resistant acid phosphate (TRAP) staining in osteoclast differentiated from Raw264.7 cells. To investigate the influence on chondrocyte differentiation, we performed alcian-blue staining in chondrocyte differentiated from ATDC5 cells. All of SC, GT and MIX did not increase ALP activity in MG-63 cells. However, SC and mixture (SC:GT=1:1, MIX) significantly inhibited osteoclastic differentiation. And they also induced chondrocyte differentiation. These results suggest that SC and GT may have a potential for the treatment of bone loss and chondral defect by suppression of osteoclast differentiation and stimulation of chondrocyte differentiation. Therefore, clarification of their mechanisms and active components will be needed.