• 한국식품영양학회지
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• 제22권2호
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• pp.302-307
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• 2009

The present study was designed to clarify the antidiabetic activity and mechanism of Dioscorea rhizome in diabetic db/db mice. Mice were administered Dioscorea rhizome and rosiglitazone orally for 7 weeks and the effects of these compounds on fasting blood glucose, glucose tolerance and intestinal disaccharidase activity in db/db mice were evaluated. The fasting serum glucose of the D. rhizome treated group was reduced when compared with that of the db/db control group. In addition, the disaccharidase activities in homogenates of the proximal, middle and distal segment of the small intestine were significantly decreased response to D. rhizome treatment, especially in the middle segment. These results suggest that D. rhizome decreases blood glucose via a decrease in the activity of disaccharidase in the mucosa of the middle region of the small intestine in db/db mice.

• 약학회지
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• 제56권1호
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• pp.55-59
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• 2012

This study was carried out to investigate the content of sulfur dioxide residues in the medicine prepared from crue drugs. Total 29 pills that contains salvia miltiorrhiza root, anemarrhena rhizome, fritillaria bulb, glehnia root, asparagus tuber, lycium fruit, moutan root bark, cimicifuga rhizome, pinellia tuber, dipsaci radix, codonopsis pilosula root, liriope tuber, achyranthes root, prepared aconite, aurantii fructus immaturus, corydalis tuber, dioscorea rhizome were examined by the modified Monier_Willams method. Sulfur dioxide were detectd in all the tested samples, and were found over MRLs (30 mg/ kg to medicinal herbs) in 8 samples (27.6%). Especilly, "i2" pills contains 132.46 mg/kg sulfur dioxide that is 4 times over than MRLs.

• 대한본초학회지
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• 제38권5호
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• pp.39-47
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• 2023

Objectives : The objective of present study was to investigate the vasorelaxant effects of 20 Korean native plants on isolated rat thoracic aorta precontracted with phenylephrine (PE). Methods : Dried 20 plant materials were extracted 3 times with water, ethanol, or methanol for 3h in the reflux apparatus at 70 ± 5℃. Male SD rats were anesthetized by ether inhalation, and their aorta rings were isolated and placed in 10 ㎖ Krebs Henseleit (KH) buffer. While using an isolated organ-chamber technique, the aorta rings were maintained by bubbling with a gas mixture of 95% O₂-5% CO₂ at 37℃. Changes in isometric tension of aorta rings were recorded via isometric transducers connected to a Powerlab Data Acquisition System. Results : Among the 20 native plants, Chrysanthemum indicum L. flower, Nelumbo nucifera Gaertn. rhizome, Schisandra chinensis (Turcz.) Baill. fruit, Anthriscus sylvestris (L.) Hoffm. root, Corydalis turtschaninovii Besser tuber, Corydalis decumbens (Thunb.) Pers. tuber, and Dolichos lablab L. seed showed significant vasorelaxant effect on the contraction of aorta rings induced by PE. In contrast, Mertensia maritima subsp. asiatica Takeda whole plant, Ajuga decumbens Thunb. whole plant, Trigonotis peduncularis (Trevis.) Benth. ex Baker & S.Moore whole plant, Dioscorea quinquelobate Thunb. rhizome, Allium microdictyon Prokh aerial part, Momordica charantia L. fruit, Carthamus tinctorius L. flower, and Clematis terniflora DC. root constricted more the aorta rings precontracted by PE Conclusion : These results suggest that the possibility as useful herbal resources for the development of functional foods or medicines for hypertension treatment.

• 생약학회지
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• 제31권4호
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• pp.455-458
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• 2000

Research on pesticide residues as endocrine disruptors in natural medicines was initiated by Korea Food & Drug Administration this year. We determined the presence and levels of certain pesticides in selected natural medicines. The natural medicines collected this year are Glycyrrhiza Root, Cinnamon Bark, Pueraria Root, Polygonatum Rhizome, Jujube, Schizandra Fruit, Lycium Fruit, Liriope Tuber, Eucommia Bark, Peony Root, Korean Angelica, Dioscorea Rhizome, Cnidium Rhizome, Cassia Seed, Platycodon Root, Comus Fruit, Mentha Herb, Epimedium Herb, Bupleurum Root, and Ginger, which have no data for pesticide residues and 192 samples of them were circulated in Korea, 28 samples were circulated in China. In order to analyze many pesticides in large number of samples we used simultaneous multi-residue analysis of pesticides by GC-ECD, which was followed by GC-MSD analysis to confirm the identity of the detected pesticide in each sample.

• 한국약용작물학회지
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• 제6권3호
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• pp.176-180
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• 1998

국내 재배 산약 제품의 가공 이용방법개발의 일환으로 산약, 당귀, 대추 등 혼합약재를 이용한 고형차 개발시험의 기초 자료를 제공하고자 산약, 당귀, 대추의 각 약재별, 추출시간별, 약재 혼합비율별 총 추출수액, 당도, 엑스함량을 조사하고 과립화한 결과는 다음과 같다. 1. 산악, 당귀 및 대추의 각 약재를 $130^{\circ}C$ 조건에서 8시간 추출하였을 때 각 약재의 총 추출 수액, Brix당도 및 엑스함량 모두 대추가 가장 높았고, 당귀, 산약의 순으로 나타나 산약의 단독이용보다는 흔합약재의 이용이 바람직한 것으로 평가된다. 2. 혼합약재 이용시 $130^{\circ}C$조건에서 추출시간을 8시간과 12시간으로 달리 하였을 때 총 추출 수액의 량은 통계적으로 유의성 있는 차이를 나타내지는 않았다. 그러나 Brix당도 및 엑스함량은 12시간 추출이 8시간 추출보다 각 1.17%, 1.80% 높은 양상을 나타내어 통계적으로 유의성이 인정되었다. 3. 산약, 당귀, 대추 각 약재의 혼합비율별 총추출수액, Brix당도. 엑스함량을 조사한바 산약 : 당귀 : 대추가 30 : 40 : 30 (750g : 1,000g : 750g)의 비율로 혼합된 약재에서 가장 높았으며, 40 : 30 : 30 (1,000g : 750g : 750g)의 비율로 혼합된 약재가 가장 낮은 결과를 나타내었다. 4. 엑스 20%, 포도당 70%, 유당 10%로 배합한 것이 외관상 양호하였다. 5. 과립 굵기는 직경 1.5mm로 하는 것이 제조, 건조가 능률적이였고 제형이 우수 하였다.

• BMB Reports
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• 제40권6호
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• pp.1016-1020
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• 2007

In this study, dioscin was isolated from Dioscoreae Rhizoma (DR), which is the rhizome of Dioscorea batatas DECNE. that inhabits broad areas of Korea and Japan. To determine whether dioscin induced growth hormone (GH) release, we evaluated its induction effects on GH release both in vitro and in vivo. The 70% methanol extract of DR, and its n-hexane and n-BuOH fractions, induced rat GH (rGH) release in rat pituitary cells 10-fold, 8-fold, and 5-fold higher than the control ($0.36{\pm}0.02 nM$), respectively (p < 0.05 each). The dioscin-induced rGH release of the cells was concentration-dependent and its $ED_{50}$ was $1.14{\times}10^{-5} M$. Within 90 minutes after intravenous administration of $10{\mu}g$/kg (p < 0.05 at $t_{max}$), dioscin caused the greatest increase in rGH concentration ($C_{max}$) in the rat plasma ($34.16{\pm}14.10 ng/ml$) (n = 4), which was twice as high as the control group ($12.88{\pm}3.29 ng/ml$) (n = 27).

• 한국식품저장유통학회지
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• 제17권3호
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• pp.391-397
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• 2010

마는 전 세계적으로 오랜 기간 동안 식용 및 약용으로 사용되어 온 중요한 생물자원이다. 본 연구에서는 2009년 경북 안동지역에서 재배된 D. batatas (경북1호 및 4호), D. alata L.(경북5호 및 6호), D. bulbifera (둥근마) 및 D. nipponica (부채마)로부터 메탄올 추출물을 조제하고, 이들의 항산화, 항혈전, 항균 활성을 평가하였다. 먼저 수분함량의 경우 마의 종류에 따라 54.7%∼83.2%로 다양하게 나타났으며 D. batatas>D. alata L.>D. nipponica>D. bulbifera 순으로 나타났으며, 메탄올 추출효율은 0.59%∼1.59%로 D. alata L.>D. batatas>D. nipponica>D. bulbifera 순으로 나타났다. 다양한 마들의 평균 총 폴리페놀, 총 플라보노이드, 총당의 경우 각각 49.82, 9.79 및 173.81 mg/g이었으며, 총 폴리페놀은 둥근 대마(경북6호)에서(87.05 mg/g), 총 플라보노이드는 둥근 대마(12.67 mg/g) 및 둥근마(13.99 mg/g)에서, 총당은 장마(경북4호, 281.96 mg/g)에서 가장 높게 나타났다. DPPH radical 소거능 평가결과, 대부분의 마 시료가 371∼486 $\mu$g/mL의 IC50를 나타내었으나, 둥근 대마의 경우 142.30 $\mu$g/mL의 IC50를 나타내어 우수한 항산화력을 확인하였다. 또한 둥근 대마는 1.5 mg/mL 농도에서 7.35배 증가된 thrombin time을 보여 강력한 트롬빈 저해활성을 나타내었다. 한편 항균력의 경우 부채마에서 우수하였으며, B. subtilis, S. aureus, P. vulgaris 및 S. typhimurium에 대한 양호한 항세균 활성을 나타내었다. 본 연구결과는 국내에서 주로 재배되고 있는 D. batatas (경북1호 및 4호) 이외의 다양한 마의 유용성을 제시하고 있다.

• 생명과학회지
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• 제27권4호
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• pp.456-463
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• 2017

본 연구는 3종의 한약재(감초(Glycyrrhizae radix), 황기(Astragali radix) 및 산약(Dioscorea rhizome)) 추출물의 에스트로겐 유사활성 및 조골세포 증식과 분화에 미치는 영향을 검토하고자 실험을 진행하였다. 에스트로겐 유사활성 측정을 위하여 인체 유방암 세포주인 MCF7 세포를 luciferase 유전자를 리포터로 사용하는 에스트로겐 반응성 리포터 시스템을 가지는 세포로 형질전환하여 사용하였다. 상기 세포를 이용하여 추출물의 에스트로겐 유사활성을 측정한 결과, 한약재 추출물이 음성대조군과 비교하여 1.11배~5.73배 높은 에스트로겐 유사활성을 나타내었다. 그 중 감초 추출물이 가장 높은 에스트로겐 유사활성을 보였다. 감초 추출물의 에스트로겐 유사활성은 추출물의 농도가 $50{\mu}g/ml$ 및 $500{\mu}g/ml$ 일 때 각각 $10^{-8}M$ 및 $10^{-7}M$ $17{\beta}-estradiol$과 거의 유사한 활성을 나타내었다. 조골세포주인 MC3T3-E1 세포를 이용한 실험에서는 감초 추출물의 농도가 $1{\sim}1,000{\mu}g/ml$ 범위일 때 독성을 나타내지 않았다. 황기 추출물은 조골세포에 있어서 유의적인 세포 증식률을 보이지 않았다. 그러나, 감초 및 산약 추출물은 각각 148% 및 133%의 최대 증식률을 보였다. 또한, 감초 추출물은 대조군과 비교하여 alkaline phosphatase(ALP) 활성이 증가하였으며, 추출물의 농도가 $100{\mu}g/ml$ 일 때 최대 122%의 ALP 활성을 나타내었다. 또한, Alizarin red S 염색법을 이용한 석회화 형성능 측정에서도 대조군과 비교하여 석회화가 증가하였다. 이러한 결과로 미루어 보아 감초 추출물이 골 형성 및 골다공증 예방 효과가 우수한 식품 소재인 것으로 사료된다.

• Animal Bioscience
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• 제36권5호
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• pp.710-719
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• 2023

Objective: The present study investigated whether protodioscin (PD), a steroidal saponin mainly found in rhizome of Dioscorea species, alleviates oxidative stress-induced damage of porcine oocytes during in vitro maturation. Methods: Oocytes were treated with different concentrations of PD (0, 1, 10, 100, and 200 µM) in the presence of 200 µM H₂O₂ during in vitro maturation. Following maturation, spindle morphology and mitogen-activated protein kinase activity was assessed along with reactive oxygen species level, GSH activity, and mRNA expression of endogenous antioxidant genes at the MII stage. On the day 7 after parthenogenetic activation, blastocyst formation rate was calculated and the quality of embryo and mRNA expression of development-related genes was evaluated. Results: Developmental competence was significantly poorer in the 0 µM PD-treated (control) group than in the non-treated (normal) and 10 µM PD-treated (10PD) groups. Although the reactive oxygen species level did not significantly differ between these three groups, the glutathione level and mRNA expression of antioxidant genes (superoxide dismutase 1 [SOD1], SOD2, nuclear factor erythroid 2-related factor 2 [Nrf2], and hemo oxygenase-1 [HO-1]) were significantly higher in the normal and 10PD groups than in the control group. In addition, the percentage of oocytes with defective spindle and abnormal chromosomal alignment was significantly lower and the ratio of phosphorylated p44/42 to total p44/42 was significantly higher in the normal and 10PD groups than in the control group. The total cell number per blastocyst was significantly higher in the 10PD group than in the control group. The percentage of apoptotic cells in blastocysts was highest in the control group; however, the difference was not significant. mRNA expression of development-related genes (POU domain, class 5, transcription factor 1 [POU5F1], caudal type homeobox 2 [CDX2], Nanog homeobox [NANOG]) was consistently increased by addition of PD. Conclusion: The PD effectively improves the developmental competence and quality of blastocysts by protecting porcine oocytes against oxidative stress.