• Asian Pacific Journal of Cancer Prevention
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• v.15 no.21
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• pp.9341-9346
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• 2014

Acanthopanax trifoliatus (L) Merr (AT) is commonly used as an herbal medicine and edible plant in some areas of China and other Asian countries. AT is thought to have anticancer effects, but potential mechanisms remain unknown. To assess the anticancer properties of AT, we exposed prostate cancer cells to AT extracts and assessed cell proliferation and signaling pathways. An ethanol extract of AT was suspended in water followed by sequential extraction with petroleum ether, ethyl acetate and n-butanol. PC-3 cells were treated with different concentrations of each extract and cell viability was determined by the MTT and trypan blue exclusion assays. The ethyl acetate extract of the ethanol extract had a stronger inhibitory effect on growth and a stronger stimulatory effect on apoptosis than any of the other extracts. Mechanistic studies demonstrated that the ethyl acetate extract suppressed the transcriptional activity of NF-${\kappa}B$, increased the level of caspase-3, and decreased the levels of phospho-Erk1/2 and phospho-Akt. This is the first report on the anticancer activity of AT in cultured human prostate cancer cells. The results suggest that AT can provide a plant-based medicine for the treatment or prevention of prostate cancer.

• Korean journal of food and cookery science
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• v.14 no.5
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• pp.577-583
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• 1998

Methanol extracts of Commelina communis, a Korean wild edible plant showing hypoglycemic effect on diebetic rats were fractionated systematically by hexane, chloroform, butanol, and water, and these four fractions were administered orally to streptozotocin-induced diabetic rats to evaluate the hypoglycemic effect. The butanol and water fractions of Commelina communis lowered blood glucose levels of diebetic rats at a dose of 500 mg/kg/day. Administration of each fraction except that of chloroform increased the plasma protein levels. Liver protein levels were significantly higher in the butanol- and water fraction-fed groups. The results suggest that the butanol fraction of Commelina communis has hypoglycemic effect on diabetic rats and the intake of Commelina communis may be beneficial for the management of diabetes mellitus.

• Applied Biological Chemistry
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• v.49 no.1
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• pp.82-85
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• 2006

The fruits of Cornus kousa Burg. were extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with EtOAc, n-BuOH and $H_2O$, successively. From the EtOAc fraction, three sterols were isolated through the repeated silica gel and ODS column chromatographies. According to the results of physico-chemical data including NMR, MS and IR, the chemical structures of the compounds were determined as ${\beta}-sitosterol$ (1), $stigmast-4-en-6{\beta}-ol-3-one$ (2) and daucosterol (3). They were the first to be isolated from Cornus kousa Burg.

• Applied Biological Chemistry
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• v.47 no.3
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• pp.357-360
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• 2004

The flower of Campsis granudiflora K. Schum. was extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with EtOAc, n-BuOH and $H_2O$. From the EtOAc fraction, four compounds were isolated through the repeated silica gel and ODS column chromatographies. From the result of physico-chemical data including NMR, MS and IR, the chemical structures of the compounds were determined as linolenic acid methyl ester, linoleic acid methyl ester, ${\beta}-sitosterol$ and daucosterol. Daucosterol inhibited FPTase activity with $IC_{50}$ values of $14{\pm}0.04\;{\mu}M$.

• Korean Journal of Food Science and Technology
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• v.39 no.1
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• pp.83-87
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• 2007

Salvia miltiorrhiza Bunge is known to potentially prevent arteriosclerosis and hypertension, but its effects on platelet function are not clear. In this study, we evaluated the in vitro antithrombotic activities of the edible plant extract. Methanol extract of S. miltiorrhiza Bunge exhibited about 70% fibrinolytic activity compared to the plasmin control, and inhibited ADP- and collagen-induced platelet aggregation in a concentration-dependent manner with $IC_{50}$ values of 0.42 and 0.07 mg/mL, respectively. S. miltiorrhiza Bunge extract significantly prolonged the activated partial thromboplastin time (APTT) and prothrombin time (PT) compared with control. Moreover, 0.05 mg/mL S. miltiorrhiza Bunge extract contained 87.3% l,l-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging activity. In conclusion, S. miltiorrhiza Bunge seemed to enhance antithrombotic activity due to its radical scavenging activity. Based on these data, further examination is required to determine the mechanism of platelet-dependent antithrombosis and the effect of polyphenols on platelet function.

• Mycobiology
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• v.43 no.3
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• pp.311-318
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• 2015

Culture filtrates of six different edible mushroom species were screened for antimicrobial activity against tomato wilt bacteria Ralstonia solanacearum B3. Hericium erinaceus, Lentinula edodes (Sanjo 701), Grifola frondosa, and Hypsizygus marmoreus showed antibacterial activity against the bacteria. Water, n-butanol, and ethyl acetate extracts of spent mushroom substrate (SMS) of H. erinaceus exhibited high antibacterial activity against different phytopathogenic bacteria: Pectobacterium carotovorum subsp. carotovorum, Agrobacterium tumefaciens, R. solanacearum, Xanthomonas oryzae pv. oryzae, X. campestris pv. campestris, X. axonopodis pv. vesicatoria, X. axonopodis pv. citiri, and X. axonopodis pv. glycine. Quantitative real-time PCR revealed that water extracts of SMS (WESMS) of H. erinaceus induced expressions of plant defense genes encoding ${\beta}$-1,3-glucanase (GluA) and pathogenesis-related protein-1a (PR-1a), associated with systemic acquired resistance. Furthermore, WESMS also suppressed tomato wilt disease caused by R. solanacearum by 85% in seedlings and promoted growth (height, leaf number, and fresh weight of the root and shoot) of tomato plants. These findings suggest the WESMS of H. erinaceus has the potential to suppress bacterial wilt disease of tomato through multiple effects including antibacterial activity, plant growth promotion, and defense gene induction.

• Applied Biological Chemistry
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• v.50 no.3
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• pp.233-237
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• 2007

The roots of Brassica campestris ssp rapa were extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with EtOAc, n-BuOH and $H_{2}O$. From the EtOAc and n-BuOH fractions, five compounds were isolated through the repeated silica gel column chromatographies. From the result of spectroscopic data including NMR and MS, the chemical structures of the compounds were determined as palmitic acid methyl ester (1), linolenic acid methyl ester (2), linoleic acid methyl ester (3), ${\beta}-sitosterol$ (4) and daucosterol (5).

• Applied Biological Chemistry
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• v.47 no.4
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• pp.422-425
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• 2004

The flower of Erigeron annuus L. was extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with EtOAc, n-BuOH and $H_2O$, successively. From the EtOAc fraction, three compounds were isolated through the repeated silica gel, ODS column and high performance liquid chromatographies. From the result of physico-chemical data including NMR, MS and IR, the chemical structures of the compounds were determined as ${\alpha}-amyrenone,\;{\alpha}-amyrin\;and\;{\beta}-amyrin$. These three compounds were isolated for the first time from the flower of Erigeron annuus L.

• Journal of Microbiology and Biotechnology
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• v.20 no.8
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• pp.1204-1209
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• 2010

We evaluated the antibacterial activities of selected edible Korean plant seeds against the food-borne pathogens Staphylococcus aureus KCTC1927, Escherichia coli KCTC2593, Salmonella typhimurium KCTC2054, and Bacillus cereus KCTC1014. While screening for antibacterial agents, we discovered that wheat germ extract contains 2,6-dimethoxy-1,4-benzoquinone (DMBQ) and is highly inhibitory to S. aureus and B. cereus. This is the first report of the antibacterial activity of wheat germ extract. We also investigated the antibacterial activities of the 1,4-benzoquinone standards 1,4-benzoquinone (BQ), hydroquinone (HQ), methoxybenzoquinone (MBQ), and 2,6-dimethoxy-1,4-benzoquinone (DMBQ). DMBQ and BQ were the most highly inhibitory to S. aureus and S. typhimurium, followed by MBQ and HQ. MICs for DMBQ and BQ ranged between 8 and 64 ${\mu}g/ml$ against the four foodborne pathogens tested. DMBQ and BQ showed significant antibacterial activity; the most sensitive organism was S. aureus with an MIC of 8 ${\mu}g/ml$. BQ exhibited good activity against S. typhimurium (32 ${\mu}g/ml$) and B. cereus (32 ${\mu}g/ml$). The results suggest that wheat germ extract has potential for the development of natural antimicrobials and food preservatives for controlling foodborne pathogens.

• Natural Product Sciences
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• v.26 no.2
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• pp.136-143
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• 2020

Psoriasis is one of the most common inflammatory skin disorders, with a global prevalence of 2% - 3%. It is an autoimmune skin disorder characterized by excessive generation of plaques on the skin with typical long-lasting red, itchy, and scaly lesions. In this study, we aimed to elucidate the anti-psoriatic effect of the methanolic extract of Persicaria senticosa (PS), a bioactive edible plant extract used in traditional medicine, using a mouse model of imiquimod (IMQ)-induced psoriasis. The daily topical application of IMQ could induce human psoriasis-like lesion. The extract ameliorated IMQ-induced psoriasis. Furthermore, hematoxylin and eosin staining and the Psoriasis Area and Severity Index (PASI) scores indicated that topical application of PS led to an improvement in erythema, scaling, and thickness scores of the mouse dorsal skin and a considerable decrease in the epidermal thickness of the ear and dorsal skin in the IMQ-induced psoriatic mouse model. We also studied the effect of PS on the proliferation of keratinocytes using HaCaT cells. The extract inhibited cell proliferation and IL-6 and pSTAT3 expression induced by M5 cocktail (comprising interleukin [IL]-1α, IL-17A, IL-22, oncostatin M, and tumor necrosis factor-α) in HaCaT cells. Thus, PS might serve as a potential therapeutic agent for the treatment of psoriasis.