• Title/Summary/Keyword: hydrocinnamic acid

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Optimization of Culture Condition for the Hydrocinnamic Acid Production from Bacillus subtilis IJ-31 (Bacillus subtilis IJ-31에서 Hydrocinnamic Acid 생산을 위한 최적배양조건)

  • Joo, Gil-Jae;Kim, Young-Mog;Lee, Oh-Seuk;Kim, Joung-Woong;Kim, Won-Chan;Song, Kyung-Sik;Yoon, Sung-Joon;Kim, Jin-Ho;Rhee, In-Koo
    • Applied Biological Chemistry
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    • v.48 no.3
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    • pp.207-211
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    • 2005
  • The metabolites released from cultures of rhizosphere bacteria can inhibit plant growth. Bacillus subtilis IJ-31 inhibited plant growth by the production of hydrocinnamic acid (HCA). The production of HCA by plant-growth inhibiting rhizobacterium B. subtilis IJ-31 was optimized. $90.5\;{\mu}g/ml$ of HCA was obtained under the condition of 1% rice bran as carbon source, 0.5% tryptone as nitrogen source, 0.1% $ZnCl_2$ as metal source at $37^{\circ}C$ for 60 h (pH 7.0). The optimal condition for the HCA production by B. subtilis IJ-31 in the jar fermenter was established using response surface methodology (RSM) of statistical analysis system(SAS) program. The production of HCA by B. subtilis IJ-31 in the jar fermenter culture reached $102.99\;{\mu}g/ml$ when 2.24% soil extracts was added and agitation speed was 290 rpm under the same condition. And the experimental value of HCA production is $102.5\;{\mu}g/ml$ in the same culture condition. The production of HCA by B. subtilis IJ-31 is higher as 12% than that from the flask culture.

Isolation and In Vitro Antimicrobial Activity of Low Molecular Phenolic Compounds from Burkholderia sp. MP-1 (Brukholderia sp. MP-1 에서의 페놀화합물의 분리와 항균활성의 측정)

  • Mao, Sopheareth;Jin, Rong-De;Lee, Seung-Je;Kim, Yong-Woong;Kim, In-Seon;Shim, Jae-Han;Park, Ro-Dong;Kim, Kil-Yong
    • Korean Journal of Soil Science and Fertilizer
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    • v.39 no.4
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    • pp.195-203
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    • 2006
  • An antagonistic strain, Burkholderia MP-1, showed antimicrobial activity against various filamentous plant pathogenic fungi, yeasts and food borne bacteria (Gram-positive and Gram-negative). The nucleotide sequence of the 16S rRNA gene (1491 pb) of strain MP-1 exhibited close similarity (99-100%) with other Burkholderia 16S rRNA genes. Isolation of the antibiotic substances from culture broth was fractionated by ethyl acetate (EtOAc) solvent and EtOAc-soluble acidic fraction. The antibiotic substances were purified through a silica gel, Sephadex LH-20, ODS column chromatography, and high performance liquid chromatography, respectively. Four active substances were identified as phenylacetic acid, hydrocinnamic acid, 4-hydroxyphenylacetic acid and 4-hydroxyphenylacetate methyl ester by gas chromatographic-mass spectrum analysis. The minimum inhibition of concentration (MIC) of each active compound inhibited the growth of the microorganisms tested at 250 to $2500{\mu}g\;ml^{-1}$. The antimicrobial activity of crude acidic fraction at 1 mg of dry weight per 6 mm paper disc was more effective than authentic standard mixture (four active substances were mixed with the same ratio as acidic fraction) over a wide range of bacterial test.

Isolation of Bioactive Compounds from the Ethylacetate Fraction of Fermented Garlic Complex and their Tyrosinase Inhibition Activities (대산(大蒜)을 포함하는 복합발효물의 에틸아세테이트 분획으로부터 Tyrosinase 저해활성 성분의 분리 및 동정)

  • Song, Hyo-Nam;Baek, Nam-In
    • Korean Journal of Plant Resources
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    • v.33 no.2
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    • pp.63-72
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    • 2020
  • Fermented complex from garlic and nine medicinal plants were developed as a natural whitening material. Tyrosinase inhibition activity was determined and four active compounds were isolated. The nutritional components of fermented garlic complex (FGC) were analyzed to confirm the applicability as a functional food material. Tyrosinase inhibitory effect of FGC was 88.6%. Methanol extract was partitioned with EtOAc, n-BuOH and H2O. From the EtOAc fraction (47 g), which showed the highest yield, active fractions were separated by repeated TLC, silica gel and ODS column chromatography to isolate active compounds. The chemical structures of the isolated compounds were analyzed by NMR and MS spectra. Phenylpropanoid compounds of 2,4,5-trihydroxy-benzenepropanoic acid (1) (1.9 mg) and 2,3,5-trihydroxy-benzenepropanoic acid (2) were confirmed. In addition, 2,4-dihydroxy-hydrocinnamic acid (3) (3.3 mg) and (+)sesamin (4) (6.1 mg) were isolated. These compounds will be useful as index compounds or functional compounds in FGC.

Functional Mechanism of Plant Growth Retardation by Bacillus subtilis IJ-31 and Its Allelochemicals

  • Kim, Won-Chan;Rhee, In-Koo
    • Journal of Microbiology and Biotechnology
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    • v.22 no.10
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    • pp.1375-1380
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    • 2012
  • We previously isolated a rhizobacterium (Bacillus subtilis IJ-31) and demonstrated that its associated allelochemicals could indicate plant growth retardation. However, little is known about how the growth of plants is regulated by B. subtilis IJ-31 and its allelochemicals. In this study, we investigated whether plant growth retardation in this relationship occurred through the inhibition of gibberellin (GA) biosynthesis. GA $3{\beta}$-hydroxylase activity was found to be inhibited by B. subtilis IJ-31 and hydrocinnamic acid (HCA), which is one of the allelochemicals produced by B. subtilis IJ-31. Additionally, thin layer chromatography (TLC) demonstrated that B. subtilis IJ-31 culture broth and HCA both inhibit GA $3{\beta}$-hydroxylase (MBP-GA4) activity. The retardation of plants by HCA was then confirmed in vivo and in vitro using a Ryegrass and Arabidopsis growth retardation assay. Furthermore, treatment with either B. subtilis IJ-31 culture extract or its allelochemicals resulted in significant down-regulation of XTR9 gene expression in Arabidopsis. Overall, we identified the functional mechanism of plant growth retardation by B. subtilis IJ-31 and its allelochemicals.

Attenuation of Atherosclerosis by 3,4-Dihydroxy-Hydrocinnamic Acid in Rabbits by Partial Inhibition of ACAT (토끼에서 ACAT 억제에 의한 3,4-다이하이드록시 하이드로시나믹산의 동맥경화 완화 효과)

  • Lee, Mi-Ran;Choi, Jae-Hoon;Yang, Young;Oh, Ki Sook;Jeong, Tae-Sook;Lee, Chul-Ho;Oh, Goo Taeg
    • Korean Journal of Clinical Laboratory Science
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    • v.48 no.4
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    • pp.280-286
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    • 2016
  • Polyphenols have been reported to have beneficial effects on cardiovascular disease. A polyphenolic compound, 3,4-dihydroxy-hydrocinnamic acid (3,4-DHHCA), has been shown to have antioxidative and antitumorigenic activities. However, the effect of 3,4-DHHCA on atherosclerosis is still unknown. Herein, we investigated the effects of 3,4-DHHCA on atherosclerosis in New Zealand White rabbits. Broad and fused fatty streak lesions were found in rabbits fed with high-cholesterol diet for 8 weeks. Administration of 3,4-DHHCA reduced atherosclerotic lesion formation and lesional accumulation of macrophage in rabbits fed with cholesterol diet without systemic or local toxicity. Hepatic acyl-coenzyme A: cholesterol acyltransferase (ACAT) activity was decreased after treatment with 3,4-DHHCA by 22% in cholesterol diet-fed rabbits compared with the control group. These results indicate that 3,4-DHHCA had antiatherogenic effects in rabbits, possibly by partial inhibition of ACAT.

Synthesis and Characterization of Photosensitizer-conjugated Gold Nanorods for Photodynamic/Photothermal Therapy (광역학적/광열치료 응용을 위한 광증감제가 결합한 골드 나노로드의 합성 및 특성분석)

  • Choi, Jongseon;Kim, So Yeon
    • Applied Chemistry for Engineering
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    • v.27 no.6
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    • pp.599-605
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    • 2016
  • Recently, photodynamic and photothermal therapies have received increasing attention as an effective cancer treatment. In this study, a gold nanorod (AuNR) colloidal solution was synthesized as a hyperthermia agent for photothermal therapy and also modified with photosensitizer (PS) for photodynamic therapy. PEG (polyethylene glycol) and FA (folic acid) ligand were also introduced into AuNR for the long circulation in human body and efficient targeting of cancer cells, respectively and AuNRs were modified with FA-PEG and poly-${\beta}$-benzyl-L-aspartate (PBLA) block copolymers through a 3,4-dihydroxy hydrocinnamic acid (HCA) linker. A series of AuNRs with various aspect ratios were synthesized by controlling the feeding ratio of $AgNO_3$. The physicochemical property and morphology of synthesized AuNR100 and FA-PEG-$P(Asp)_{50}$-HCA-AuNR100 were analyzed by UV-visible spectrophotometer, $^1H$ NMR, XPS measurements, TEM. The surface modified AuNR carrier with biocompatibility could be applied for the effective diagnosis as well tumor phototherapy.