• Korean Journal of Plant Resources
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• v.36 no.4
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• pp.282-289
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• 2023

Glycyrrhiza korshinskyi Grig. (Gk), which is a new variety of Glycyrrhiza, was developed by the National Institute of Horticultural and Herbal Science in Korea Rural Development Administration. It is improved the limitations of traditional Glycrrhiza species such as G. uralensis Fisch., G. glabra L., and G. inflata Batal. and has been reported various pharmacological effects. The aim of this study is to investigate the protective effect of Gk on the acute pancreatitis, because which has not been revealed yet. AP was induced via intraperitoneal injection of cerulein (50 ㎍/kg) hourly for 7 times in C57BL/6 mice. Gk water extract (20 or 50 mg/kg) or saline was administrated via oral gavage 1 h before the first injection of cerulein. The mice were sacrificed at 5 h after the final injection of cerulein. The inflammatory cell infiltration in pancreatic tissue was decreased by the administration of Gk water extract compared to the AP group. Also, serum amylase and lipase levels were decreased by the administration of Gk water extract compared to the AP group. These results suggest that Gk have protective effect on the acute pancreatitis.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.12a
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• pp.80-80
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• 2020

Glycyrrhizae Radix (GR), commomly known as liquorice, is a medicinal and edible plant widely used in East Asia with its pharmacological properties. Currently, Glycyrrhiza uralensis, G. glabra and G. inflata are used for pharmaceutical purposes in Korea and then the improved Glycyrrhiza varieties, WON-GAM (WG) has been developed by Korea Rural Development Administration. To evaluate equivalence of efficacy, several comparative studies between already-registered species and new cultivars have been conducted. To evaluate equivalence of efficacy, several comparative studies between already-registered species and new cultivars have been conducted. The aim of this study was to evaluate the effect of WG on fecal microbiota in DSS-induced colitis model. Fecal microbiota was analyzed by terminal restriction fragment length polymorphism (T-RFLP). The composition of the fecal microbiota did not show a specific pattern based on experimental groups; however, a tendency toward an increase in the proportion of Lactobacillales was observed. Glycyrrhiza varieties could change composition of fecal microbiota in DSS-induced colitis model. This work was carried out with the support of "Cooperative Research Program for Agriculture Science and Technology Development (Project No. PJ014246022020)" Rural Development Administration.

• 한국약용작물학회:학술대회논문집
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• 2008.11a
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• pp.352-353
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• 2008

• 한국약용작물학회:학술대회논문집
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• 2011.04a
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• pp.236-237
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• 2011

• 한국약용작물학회:학술대회논문집
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• 2011.09a
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• pp.310-311
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• 2011

• 한국약용작물학회:학술대회논문집
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• 2011.09a
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• pp.126-127
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• 2011

• 한국약용작물학회:학술대회논문집
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• 2010.10a
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• pp.268-269
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• 2010

• Nutrition Research and Practice
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• v.12 no.3
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• pp.191-198
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• 2018

BACKGROUD/OBJECTIVES: Neuroinflammation plays critical role in neurodegenerative disorders, such as Alzheimer's disease (AD). We investigated the effect of three licorice varieties, Glycyrhiza uralensis, G. glabra, and Shinwongam (SW) on a mouse model of inflammation-induced memory and cognitive deficit. MATERIALS/METHODS: C57BL/6 mice were injected with lipopolysaccharide (LPS; 2.5 mg/kg, intraperitoneally) and orally administrated G. uralensis, G. glabra, and SW extract (150 mg/kg/day). SW, a new species of licorice in Korea, was combined with G. uralensis and G. glabra. Behavioral tests, including the T-maze, novel object recognition and Morris water maze, were carried out to assess learning and memory. In addition, the expressions of inflammation-related proteins in brain tissue were measured by western blotting. RESULTS: There was a significant decrease in spatial and objective recognition memory in LPS-induced cognitive impairment group, as measured by the T-maze and novel object recognition test; however, the administration of licorice ameliorated these deficits. In addition, licorice-treated groups exhibited improved learning and memory ability in the Morris water maze. Furthermore, LPS-injected mice had up-regulated pro-inflammatory proteins, such as inducible nitric oxide synthase (iNOS), cyclooxygenase-2, interleukin-6, via activation of toll like receptor 4 (TLR4) and nuclear factor-kappa B ($NF{\kappa}B$) pathways in the brain. However, these were attenuated by following administration of the three licorice varieties. Interestingly, the SW-administered group showed greater inhibition of iNOS and TLR4 when compared with the other licorice varieties. Furthermore, there was a significant increase in the expression of brain-derived neurotrophic factor (BDNF) in the brain of LPS-induced cognitively impaired mice that were administered licorice, with the greatest effect following SW treatment. CONCLUSIONS: The three licorice varieties ameliorated the inflammation-induced cognitive dysfunction by down-regulating inflammatory proteins and up-regulating BDNF. These results suggest that licorice, in particular SW, could be potential therapeutic agents against cognitive impairment.

• Journal of Korean Medical classics
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• v.19 no.4
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• pp.219-225
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• 2006

The result is the followings after investigating composition, dosage and usage of Sagunjatang(四君子湯), Samultang(四物湯), Palmultang(八物湯), Sipjeondaebotang(十全大補湯) in literature by country and Era 1. Sagunjatang has become equal to Panax ginseng(人蔘), Atractylodes japonica(白朮), Poria cocos(복령) each for 2 Jeon(錢), Glycyrrhiza uralensis(甘草) 1 jeon since the Ming Dynasty in China and it is standardized by Panax ginseng, Atractylodes japonica, Poria cocos and Glycyrrhiza uralensis each for 1 Jeon 2 Pun(分) 5 Ri(里) since Dongeuibogam in Korea. 2. Samultang has become equal to Angelica gigas(當歸) and Rehmannia glutinosa(地黃) each three Jeon, Cnidium officinale(川芎) is 1 Jeon 2 Pun or 1 jeon and Paeonia lactiflora(芎藥) 2 Jeon since the Ming Dynasty in China and it is standardized by Angelica gigas, Cnidium officinale, Paeonia lactiflora and Rehmannia glutinosa each for 1 Jeon 2 Pun 5 Ri since Dongeuibogam in Korea. 3. In the case of Palmultang, compositional usage of medicine was different in the Ming Dynastry and the Ching(靑) Dynastry in China. Total dosage was increased and ratio of Angelica gigas and Rehmannia glutinosa was increased comparatively in the Ching Dynasty. All prescription of medicine was consisted of 1 Jeon 2 Pun and specific dosage was presented except Euirimchwalyo(醫林撮要) that dosage was not recorded in Korea. 4. Sipjeondaebotang tended to increase total dosage in the latter part in China. Dosage was mostly used 1 Jeon thus Dongeuibogam but Bangyakhap(方藥合編) used 1 Jeon 5 Pun differentially.

• Journal of Microbiology and Biotechnology
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• v.30 no.2
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• pp.178-186
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• 2020

Licorice (Glycyrrhiza uralensis) contains several compounds that have been reported to alleviate menopausal symptoms via interacting with estrogen receptors (ERs). The compounds exist mainly in the form of glycosides, which exhibit low bioavailability and function. To bioconvert liquiritin and isoliquiritin, the major estrogenic compounds, to the corresponding deglycosylated liquiritigenin and isoliquiritigenin, respectively, licorice was fermented with Monascus, which has been demonstrated to deglycosylate other substances. The contents of liquiritigenin and isoliquiritigenin in Monascus-fermented licorice increased by 10.46-fold (from 38.03 μM to 379.75 μM) and 12.50-fold (from 5.53 μM to 69.14 μM), respectively, compared with their contents in non-fermented licorice. Monascus-fermented licorice exhibited 82.5% of the ERβ binding activity of that observed in the positive control (17 β-estradiol), whereas the non-fermented licorice exhibited 54.1% of the binding activity in an in vivo ER binding assay. The increase in the ERβ binding activity was associated with increases in liquiritigenin and isoliquiritigenin contents. Liquiritigenin acts as a selective ligand for ERβ, which alleviates menopausal symptoms with fewer side effects, such as heart disease and hypertension, compared with a ligand for ERα. In addition, Monascus-fermented licorice contained 731 mg/kg of monacolin K, one of the metabolites produced by Monascus that reduces serum cholesterol. Therefore, Monascus-fermented licorice is a promising material for the prevention and treatment of menopausal syndrome with fewer side effects.