• Journal of the Korean Society of Food Culture
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• v.34 no.6
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• pp.801-809
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• 2019

Abeliophyllum distichum Nakai is a deciduous shrub of a flowering plant in Oleaceae. It is an important plant resource and consists of only one species in the entire world. A. distichum Nakai is well known an edible, medicinal herb in its habitat districts, but the toxicological evaluation for the safe use of its extract is still insufficient. The study characterized the toxicity of an Abeliophyllum distichum Nakai ethanol extract in Sprague-Dawley (SD) rats and determined the safe dosage levels in a 13 weeks toxicity study. Abeliophyllum distichum Nakai ethanol extract was orally administered once daily for 2 weeks at 0, 500, 1,000 and 2,000 mg/kg/day to male and female SD rats. while recording the clinical signs of toxicity, body weight, food intake/consumption, eye test and urine analysis. Only the total protein frequency in the urine of male SD rats (p<0.05), the right ovary of the 500 mg/kg group (p<0.01) and the right adrenal gland of the 1,000 mg/kg group (p<0.05) in the female rats showed statistically significant changes. But no toxic effects were noted from repeated-dose administration of the Abeliophyllum distichum Nakai ethanol extract in the SD rats during the observation period. The post-mortem examinations showed no test substance-mediated changes. The hematological analysis and clinical blood chemistry data demonstrated no toxic effects from repeated-dose administration of Abeliophyllum distichum Nakai ethanol extract in the SD rats during the observation period. Based on these results, this data suggests that a dose of 1,000 mg/kg/day is a highest treatment to administer when conducting a further 13 weeks toxicity study.

• Korean Journal of Agricultural Science
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• v.48 no.3
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• pp.557-565
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• 2021

Interest in research on various medicinal plants has increased globally over the last few decades, possibly due to their possible antibacterial and antioxidant activities. The present study was conducted to verify the antioxidant effects, antibacterial activity, and collagen synthesis and cell viability outcomes of adipocytes upon exposure to Abeliophyllum distichum Nakai (AdN). Antibacterial activity was measured through the Disc diffusion method to compare the growth ability of pathogenic microorganisms (E.coli, Salmonella). The absorbance was measured at 560 nm to calculate the active oxygen scavenging ability. Fibroblasts were dispensed in a 96-well plate at a density of 1 × 10⁵ cells·well^-1. The amount of procollagen was measured in each case using a procollagen type 1 C-peptide EIA KIT. The cytotoxicity of the Abeliophyllum distichum Nakai extract against animal adipocytes (Hanwoo backfat cells) was determined using a 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) assay, a method that measures the conversion of MTS to Formazan by means of mitochondrial dehydrogenases. The concentrations of the samples were made to be 0.0125, 0025, 0.05, 0.1, and 0.5% and all were -completely absorbed into the disc in an incubator at 37℃ for 24 to 36 hours. For the 0.125 mg·disc^-1, effects of Abeliophyllum distichum Nakai on the antioxidant effect, antibacterial activity, and cell viability of adipocytes were found. However, Abeliophyllum distichum Nakai had no effect on collagen synthesis, thus suggesting that AdN extracts may be useful for the prevention and/or treatment of obesity.

• Journal of Environmental Health Sciences
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• v.40 no.3
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• pp.234-244
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• 2014

Objectives: This study was carried out in order to analyze the composition of the leaves and stems of Abeliophyllum distichum Nakai, with the aim of obtaining basic data for utilizing the plant as a food ingredient, as well as for processing. Methods: Leaves and stems from Abeliophyllum distichum Nakai were harvested at Cheongcheon-myeon, Geosan-gun, Chungcheongbuk-do, and were subsequently freeze-dried and ground to a fine powder for chemical component analysis and safety evaluation. Results: The moisture contents of Abeliophyllum distichum Nakai leaves and stems were respectively 65.07% and 40.97%, and the crude ash contents were 1.32% and 0.91%. In addition, the crude protein contents were 11.97% and 3.77%, and the crude fat contents were 2.52% and 0.36%, respectively. The fructose and glucose contents were 32.13 mg/g and 56.17 mg/g for leaves, and 11.38 mg/g and 10.59 mg/g for stems. The major fatty acids of the leaves were palmitic acid (31.79%) and stearic acid (14.79%), and those for stems were linolenic acid (32.78%) and palmitic acid (26.75%). The ascorbic acid contents of leaves and stems were 1.32 mg/g and 0.30 mg/g respectively. The calcium content was found to be the highest among the minerals tested, both in the leaves and stems, with the levels being 166.17 mg/100 g for leaves and 592.34 mg/100 g for stems. The content of organic acid was greater in leaves than in stems, with that of malic acid accounting for more than 75% of total organic acids for both samples. The total phenolic compounds and flavonoid contents of Abeliophyllum distichum Nakai were 50.64 mg/g and 13.53 mg/g in leaves and 96.47 mg/g and 18.53 mg/g in stems, respectively. No changes were shown in the number of micronucleated polychromatic erythrocytes (MNPCE) among 2,000 polychromatic erythrocytes compared to the negative control. Abeliophyllum distichum Nakai was administered orally to rats in order to investigate acute toxicity. The $LD_{50}$ values in rats were above 2,000 mg/kg. Conclusion: These results indicate that the leaves and stems of Abeliophyllum distichum Nakai can be used as natural ingredients in the development of nutritional and functional materials.

• Korean Journal of Plant Taxonomy
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• v.35 no.2
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• pp.143-151
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• 2005

Cytological characteristics of Abeliophyllum distichum (Oleaceae), endemic to Korea, was examined. Somatic chromosome numbers was 2n = 28 which corresponds to diploid based on x=14. Chromosome length was varied continuously from $1.00{\mu}m$ to $2.03{\mu}m$. Karyotype of Abeliophyllum distichum was investigated in this study for the first time. The cytological characteristics including basic chromosome number, continuous variation of chromosome length, diploid and karyotype were similar to those of the genus Forsythia, which indicated the close relationship between Abeliophyllum and Forsythia, and consequently the two genera seemed to be included to same tribe.

• Korean Journal of Plant Resources
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• v.31 no.3
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• pp.202-210
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• 2018

Abeliophyllum distichum is a medicinal plant used in regional traditional medicine to relieve pain in inflammatory processes. In this study, anti-inflammatory effects of Abeliophyllum distichum flower (ADF) extract were examined. Furthermore, possible molecular mechanisms of the anti-inflammatory effects were dissected. The anti-inflammatory activity was investigated by inhibition of lipopolysaccharide (LPS) induced pro-inflammatory cytokine production in murine macrophage-like cell line Raw264.7 cells. The measurement of the induced pro-inflammatory cytokine levels were carried out by ELISA. The phosphorylation of ERK1/2, JNK, and MAPK, and the nuclear expression of nuclear factor NF-${\kappa}B$ p65 were investigated by Western blot analysis. The extract of ADF significantly decreased the production of pro-inflammatory cytokines. In addition, the extract suppressed the phosphorylation of ERK1/2, JNK, and p38 MAPK, and the nuclear translocation of NF-${\kappa}B$ p65 in activated cells. Our findings provide evidence for the popular use of Abeliophylli distichum in inflammation around Goesan region and also suggest that the flower extract has potential therapeutic benefits against various inflammatory diseases.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.04a
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• pp.118-118
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• 2019

Abeliophyllum distichum Nakai belonging to Oleaceae is only species in Korean endemic genus, Abeliophyllum. Abeliophyllum distichum (AD) is divided into various types according to flower shape and color. AD is known to have various colors such as white, pink, and ivory. Recently, light yellow flowers have been registered as new varieties (Okhwang 1ho). To date, various ecological and morphological studies on AD have been carried out, but no studies have been made on the phytochemicals and activities according to various traits. In this study, we analyzed the phytochemicals and antioxidative activities of from four kinds of flowers (white, pink, ivory, light yellow) in full bloom. The contents of phytochemicals such as chlorogenic acid, Hirsutrin, Rutin, Acteoside and Isoacteoside were analyzed by HPLC. Antioxidant activity was evaluated by DPPH, ABTS. As a result, the content of each substance varied according to the flower color. These results will provide basic data for evaluating the usefulness of genetic resources in Korea and developing new functional materials in preparation for the Nagoya Protocol.

• Korean Journal of Plant Resources
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• v.26 no.3
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• pp.355-361
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• 2013

The present study attempts to evaluate antioxidant activities of extracts from Abeliophyllum distichum. Nakai flower. The samples were collected in Jangyyeon-myeon, Goesan-gun, Korea and extracted with either hot-water or ethyl acetate (EtOAC). In DPPH, hydroxyl radical scavenging activity and $Fe^{2+}$ chelating activity of EtOAC extracts were 93.41%, 98.43%, and 7.38%, while those of hot-water extracts were 86.93%, 41.33% and 47.68% at 200 ${\mu}g/ml$, respectively. In ${\varphi}X$-174 RF I plasmid DNA cleavage assay, the protective effects of EtOAC and hot-water extracts against oxidative DNA damage were 82% and 17% at 200 ${\mu}g/ml$, respectively. Both extracts showed the protective effect of DNA migration by oxidative stress in intracellular DNA migration assay. Both extracts had no cytotoxity in NIH3T3 cells. Several polyphenolic compounds were identified such as 2-methoxy-benzoic acid, vanillic acid, phytol and pulegone by GC/MS. These results indicated that extracts of Abeliophyllum distichum Nakai flower showed antioxidant activities and protective activities against oxidative DNA damage and showed the possibility to be used as an effective natural antioxidants.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.04a
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• pp.89-89
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• 2018

Abeliophyllum distichum is a medicinal plant used in regional traditional medicine to relieve pain in inflammatory processes. In this study, anti-inflammatory effects of Abeliophyllum distichum stem (ADS) ethyl acetate extract were examined. Furthermore, possible molecular mechanisms of the anti-inflammatory effects were dissected. The anti-inflammatory activity was investigated by inhibition of lipopolysaccharide (LPS) induced pro-inflammatory cytokine production in murine macrophage-like cell line Raw264.7 cells and human microglial cell line BV2 cells. The measurement of the induced pro-inflammatory cytokine levels were carried out by ELISA. The phosphorylation of ERK1/2, JNK, and MAPK, and the nuclear expression of nuclear factor $NF-{\kappa}B$ p65 were investigated by Western blot analysis. The extract of ADS significantly decreased the production of pro-inflammatory cytokines. In addition, the extract suppressed the phosphorylation of ERK1/2, JNK, and p38 MAPK, and the nuclear translocation of $NF-{\kappa}B$ p65 in activated cells. Our findings provide evidence for the popular use of Abeliophylli distichum in inflammation around Goesan region and also suggest that the stem extract has potential therapeutic benefits against several inflammatory diseases.

• Korean Journal of Medicinal Crop Science
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• v.23 no.2
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• pp.155-160
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• 2015

This research evaluate antioxidant and skin-whitening effect of Abeliophyllum distichum Nakai by extraction processes. First, antioxidant effects were follows: EE (70% ethanol extract) showed higher DPPH scavenging activity of 69.66% than WE (hot water exract) 59.13% at $0.3mg/m{\ell}$, also UE's (70% ethanol extract by sonication process) higher than EE. Reducing power was that also EE showed higher than WE, and it was the highest value with UE's because of ultrasonic pretreatment. Next, the whitening effect tyrosinase inhibition activity was measured that EE was 23.88%, WE's was 16.69%, and UE was 23.34%. Ultrasonic pretreatment did not influence to tyrosinase inhibition activity. Cell viability showed low cell toxicity in all groups. UE's inhibited melanin synthesis, 55.1%, that is higher than EE and WE, 52.7% and 39.5%, respectively. As a result, we confirmed that antioxidant activities and skin-whitening effect by extraction process. Also, this results confirmed that the Abeliophyllum distichum Nakai extracts worth as cosmetic materials.

• Korean Journal of Plant Resources
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• v.15 no.1
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• pp.26-35
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• 2002

Abeliophyllum distichum Nakai (O1eaceae) is a monotype of Korea and is distinguished from related genus Forsythia Vahl by the morphological characters such as fruit shape, flower color and etc. Even though several intraspecific taxa were reported according to the color of flowers and shape of fruits, there have been many controversals on the taxonomic indentity and status of rank on those taxa. In the present study, we performed the RAPD analysis to delimit the infraspecific taxa of Abeliophyllum distichum and to investigate the genetic polymorphism and relationships among 12 populations. 212 scorable RAPD markers with 70 common markers were found from the PCR reactions with 16 random oligoprimers and were analyzed by Nei's genetic distance. From 0.108 to 0.321 of genetic variations were showed among the taxa. Some regional groups instead of same taxa were clustered from the phonogram of UPGMA analysis. Also, we could not find distinct lineage among intraspecific taxa. The result from RAPD analysis supported that the infraspecific taxa of Abeliophyllum distichum might be the individual variations and treated as the same taxa. RAPD analysis was very useful to confirm the high gene pool with diverse genetic polymorphism among Abeliophyllum distichum populations.