• 한국자원식물학회지
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• 제30권3호
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• pp.311-317
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• 2017

This study was conducted with the aim of evaluating the antibiotic effects of leaves, stems, and roots in yacon (Smallanthus sonchifolius). Antibacterial activity of leaf extract by disk diffusion method with Bacillus subtilis and Escherichia coli respectively showed 13.3 and 13.75mm diameters of clear zone. There was no significant difference between the stems and leaves. The minimum inhibitory concentration of leaves' heating and agitation extraction showed a restrain of strain at 1mg/ml, but the stems and root extract did not appear. Yacon is a functional antibacterial material, and methanol extraction is more effective than water. This research was to investigate the growth stage of collection has the most effective antibacterial effects. It has collected yacon's leaves from June to October, which is an appropriate time for collection right before reaping. Yacon leaf has antibacterial effects on Bacillus subtilis, Escherichia coli, Enterococcus faecium, and Salmonella enteritifis. There were no significant differences by the growth stage of collection. Leaves collected in July are high in phenol which helps in sulfating activity works well considering the high scavenging capability of DPPH. Leaves collected in September are high in total flavonoid.

• 한국자원식물학회지
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• 제28권6호
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• pp.734-742
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• 2015

The purpose of this research was to find the most appropriate process for making yacon leaf tea. We applied both green tea and black tea brewing and fermenting methods for producing yacon leaf tea. This research included consumer test and descriptive analysis of professional trained panel on yacon tea tastes and flavors. Both consumer test and descriptive evaluation preferred yacon tea produced by black tea brewing and fermenting methods because it tasted less bitter and had a sweet, delicate taste. According to orthogonal transformation resulting from varimax rotation, first principal component was positively affected by black tea brewing and fermenting methods, while it was negatively affected by green tea brewing and fermenting methods. As a result, the study concluded black tea brewing and fermenting methods were appropriate for producing yacon leaf tea.

• 한국식생활문화학회지
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• 제27권1호
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• pp.82-88
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• 2012

In this study, the effects of yacon (Smallanthus sonchifolius) leaf on the quality characteristics of cookies were examined. In order to investigate its effects, four different amounts (0%: Control, Y-0.5, Y-1.0, Y-1.5) of yacon leaf powder were added to the cookie dough. Among the physicochemical and sensory characteristics, the density and pH of the dough, spread factor, color value, firmness, consumer acceptability, and Pearson's correlation coefficients were measured. Although there was no significant difference in pH of the doughs among the groups, density significantly decreased with increasing amount of yacon leaf powder (p<0.05). While the L, a, b values, and hardness decreased significantly, DPPH free radical scavenging activity increased significantly as the content of yacon leaf powder increased (p<0.05). Overall acceptability, appearance, taste, and texture between the control and Y-0.5 groups showed no significant differences. This study suggests the possibility of yacon leaf as an ingredient that increases the functionality of cookies.

• 한국응용과학기술학회지
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• 제30권2호
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• pp.332-338
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• 2013

This study was carried to investigate the antidiabetic effect of ethanol extract of Smallanthus sonchifolius(S.S) in Streptozotocin(STZ)- induced diabetic rats. Diabetes was induced by intravenous injection of STZ at a dose of 43mg/kg dissolved in citrate buffer. The ethanol extract of S,S in leaves and root were orally administrated once a day for 7 days at a dose of 1,000mg/kg. The contents of serum glucose, triglyceride(TG), total cholesterol were significantly decreased in S.S treated group compared to the those of STZ-control group. The content of hepatic glycogen and activity of glucokinase(GK) were significantly increased,and activity of glucose-6-phoshatase(G-6-Pase) was significantly decreased in S.S treated group compared to the those of STZ-control group, but activity of glucose-6-phosphate dehydrogenase(G-6-PDH) was not significantly increased, These results indicated that ethanol extract of S.S would have antidiabetic effect in STZ-induced diabetic rats.

• 생명과학회지
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• 제22권7호
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• pp.904-911
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• 2012

야콘(Smallanthus sonchifolius)은 저혈당에 민간요법으로 이용해 오고 있는 구근작물이다. 최근에는 야콘잎이 항산화, 항균, 항진균 활성과 세포보호 기능이 있다고 보고되고 있다. 본 실험에서는 이러한 생리활성을 지니는 야콘잎을 이용하여 흰쥐에 DBTC (8 mg/kg)를 주사하여 췌장염을 유발시킨 후 1% 야콘추출물이 췌장의 섬유화에 미치는 영향을 연구하였다. 유발 21일째 처리군에서 췌장의 실질조직의 많은 부분이 collagen으로 재구성되어 있었으나 유발군에서는 처리군에 비해 현저히 감소되어 있었다. COX-2 발현에서, 대조군은 반응이 나타나지 않거나 매우 약한 반응이었으나, 유발군에서는 14일째 매우 증가되었으며, 특히 21일째는 침윤하고 있는 많은 염증세포에서 COX-2의 발현이 확인되었다. 처리군은 유발군에 비해 발현이 감소되었다. TGF-${\beta}1$ 발현은 21일째 염증세포에서는 유발군이 처리군에 비해 현저한 증가 현상이 나타났으나, 샘꽈리세포에서의 TGF-${\beta}1$의 발현은 처리군에서 증가되었다. VEGF 발현은 TGF-${\beta}1$의 발현과 거의 유사한 경향으로 나타났다. 그러므로 야콘추출물이 DBTC로 유도된 췌장염의 섬유화 진행을 억제하는데 매우 효과적임을 확인하였다.

• 동아시아식생활학회지
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• 제22권3호
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• pp.408-413
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• 2012

본 연구는 김치에 첨가되는 야콘(Smallanthus sonchifolius)이 김치 발효 중에 김치의 이화학적 특성과 발효 품질에 미치는 효능을 관찰하였다. 5개의 다른 야콘 농도, 즉 0.1%, 0.5%, 1%, 및 5% 농도의 야콘을 김치에 첨가하였고, 야콘을 첨가하지 않은 김치를 대조군으로 비교하였다. 발효가 진행됨에 따라, 전체 산도와 유산농도, 미생물의 수가 증가하는 반면에, pH는 김치를 담근 직후 5.5~5.7에서 21일간 발효 후에는 4.6~4.8으로 감소하였다. 야콘을 5%로 첨가한 군에서는 발효 7일째의 유산 함량이 다른 군들보다 높게 나타나 Leuconostoc 생균수 증가와 연관성을 보여준다. 이러한 결과는 5% 야콘을 김치에 첨가시 Leuconostoc sp. 등의 김치 미생물들의 생육을 촉진시키는 것을 보여준다.

• Biomolecules & Therapeutics
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• 제21권2호
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• pp.153-160
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• 2013

We screened the pharmacological effects of a 50% ethanol extract of Yacon tubers and leaves on spermatogenesis in rats. As a result, we found that Yacon tuber extracts increased sperm number and serum testosterone level in rats. It has been reported that the crude extract of Yacon tubers and leaves contain phenolic acids, such as, chlorogenic acid, ferulic acid and caffeic acid by HPLC/MS analysis. We were interested in the contributions made by phenolic acid, particularly chlorogenic acid of Yacon tuber extract to the spermatogenic activity. After administering Yacon tuber extract or chlorogenic acid to rats for 5 weeks, numbers of sperm in epididymis were increased by 34% and 20%, respectively. We also administered ferulic acid, which has been reported to be a metabolite of chlorogenic acid and a constituent of Yacon tuber extract to investigate its spermatogenic activity in rats. Yacon tuber extract and ferulic acid increased sperm numbers by 43% and 37%, respectively. And, Yacon tuber extract, and chlorogenic acid showed significantly inhibition effect of testoeterone degradation in rat liver homogenate. We considered that the spermatogenic effect of Yacon tuber extract might be related to phenolic compounds and their inhibitory effect of testosterone degradation. Yacon showed the possibility as ameliorable agents of infertility by sperm deficiency and late onset hypogonadism syndrome with low level of testosterone.

• Natural Product Sciences
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• 제14권2호
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• pp.73-80
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• 2008

The authors screened the pharmacological effects of 50% ethanol extracts of Yacon on spermatogenesis in rats. Numbers of sperm in animals treated with 25, 50, or 100 mg/kg/day for 6 weeks of Yacon tuber extracts (YTE) were approximately 1.51, 1.61 and 1.78 times higher, respectively, than in the untreated control group. Moreover, the spermatogenic effect of Yacon leaf extract was found to be $1.03{\sim}1.38$ times higher than that of YTE. The ameliorative effect of Yacon tuber extracts on 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) induced toxicities in the rat were also investigated. Rats were assigned to three groups (6 rats/group), a control group, a TCDD exposed group, and a group treated with Yacon tuber extract (YTE) after TCDD exposure (TCDD/YTE group). 40 ${\mu}g/kg$ of TCDD was injected i.p., and 200 mg/kg/day of YTE was also administered for 4 weeks by oral gavage. The TCDD/YTE group showed a significant increase in sperm number as compared with the TCDD exposed group. In conclusion, TCDD induced testicular toxicity was significantly ameliorated by YTE. The results of the present study suggest that Yacon extract is a possible therapeutic for the treatment of spermatogenic disorder.

• 생약학회지
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• 제45권3호
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• pp.233-239
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• 2014

We evaluated the benign prostatic hyperplasia (BPH) with Yacon pill, the preparation composed of Smallanthus sonchifolius, Torilis japonica and Acorus gramineus. A total of 45 rats were divided into five groups. One group was used as a control and the other groups received subcutaneous injections of testosterone for 4 weeks to induce BPH. Yacon pill extract (200 or 400 mg/kg) was administered daily for 4 weeks to two groups by oral gavage concurrently with testosterone. The rats euthanized, the prostate and body weights were recorded, and tissues were subjected to hormone assay. In addition, we investigated proliferating cell nuclear antigen (PCNA) expression in the prostate using immunoblotting. Rats with BPH showed significantly increased prostate weights, increased dihydrotestosterone (DHT) levels in the serum and increased PCNA expression in the prostate; however, Yacon pill extracts treated rats showed significant reduction of prostate weights, DHT levels and PCNA expression compared with the BPH group. Conclusively, Yacon pill showed the possibility as ameliorable agents of BPH symptoms.

• 한국잡초학회지
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• 제32권2호
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• pp.98-106
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• 2012

본 연구는 야콘의 잎, 줄기, 괴경 추출물 중 어느 부위에서 제초, 살균 및 살충효과가 가장 높은지를 알아보기 위해서 각 부위별로 물, 열수 그리고 메탄올로 추출하였다. 또한 위의 추출방법 중 제초활성능력이 뛰어난 것을 hexane, chloroform, ethyl acetate, BuOH, $H_2O$로 용매분획하여 잠정적 제초 성분에 대한 특성을 조사하였다. 전반적으로 오이와 보리의 발아율, 초장 및 근장 억제에 대한 추출방법 중에 메탄올 추출법이 가장 효과적이었다. 또한 식물체 부위별로는 괴경에서 가장 효과적이었다. Ethyl acetate, butanol, chloroform, hexane, water의 용매분획에서 오이와 보리의 발아율, 초장 및 근장 저해는 물층에서 가장 좋았고 그 밖의 분획에서는 차이가 없었다. 5%와 10% 야콘 괴경 추출물에 의해 바랭이와 까마중은 각각 70~80%와 95~100% 방제되었다. 그러나 이들 농도의 야콘 괴경 추출물에 의한 오이와 보리 경엽처리에 의한 저해 효과는 인정할 수 없었다. 5% 야콘 잎 추출물 처리 후 3일째 복숭아혹진딧물의 살충률은 50%이었다. 벼멸구의 경우 5% 줄기와 잎(중륵 포함) 추출물에 의한 살충률은 24%로 낮았고 중륵이 배제된 잎 추출물에서 57% 살충률을 보였다. 그러나 5% 잎 추출물에 대한 탄저병, 시들음병, 청고병, 흰잎마름 병원균에 대한 살균효과는 없었다.