• Title/Summary/Keyword: anti inflammatory

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Suppression of Microglial Activation by Acute Ethanol Administration through HT7 Stimulation (급성 알코올 투여 백서의 신문혈 자극이 소교세포 활성에 미치는 영향)

  • Su Yeon Seo;Se Kyun Bang;Suk Yun Kang;Seong Jin Cho;Kwang-Ho Choi;Yeonhee Ryu
    • Korean Journal of Acupuncture
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    • v.41 no.2
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    • pp.33-42
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    • 2024
  • Objectives : The sigma-1 receptor is implicated in stress, depression, psychostimulant sensitization, and addiction vulnerability. Prior studies have indicated that ethanol exposure modulates sigma-1 receptor activity within the Ventral Tegmental Area (VTA). Here, we explore the sub-mechanisms underlying sigma-1 receptor activity induced by HT7 (Shinmun) stimulation in behavioral alterations following acute ethanol (ETOH) administration. Methods : Male Wistar rats were investigated for pro- and anti-inflammatory markers after injection of ETOH (1 g/kg) using cytokine enzyme-linked immunosorbent assay (ELISA)s. After confirming that HT7 stimulation changed the total distance traveled in the open field test (OFT), protein changes in the Ventral tegmental area (VTA) were measured by Western blotting. The expression level of inducible nitric oxide synthase (iNOS) after administration of a sigma-1 receptor antagonist (dihydrobromide 1047; BD1047, 10 mg/kg i.p.) and Shenmen (HT7) stimulation was compared. Results : As a result, acute ETOH administration increased proinflammatory marker levels (TNF-𝛼 and IL-6). HT7 stimulation restored the total distance response after acute ethanol administration. In addition, in the VTA, the levels of a microglial marker (iNOS), sigma-1 receptor and protein kinase C, which are predicted to be involved in up- and downregulation, were restored by HT7 stimulation. In particular, HT7 stimulation modulates iNOS expression through effects similar to BD treatment. This study suggests that the stimulatory effect of HT7 may be driven by microglial activation. Conclusions : Microglial activity is regulated by sigma-1 receptor, and sigma-1 receptor activity is regulated by HT7 stimulation. Significantly, we demonstrate that HT7 stimulation ameliorates behavioral alterations induced by acute ETOH administration through microglial activation within the VTA.

The Study of anti-inflammatory Mechanism with Cobra Venom on Astrocytes of Rats (뇌(腦) 성상세포(星狀細胞)를 대상으로 한 Cobrotoxin의 염증(炎症) 치료(治療) 기전(機轉) 연구(硏究))

  • Yoo, Jae-ryong;Song, Ho-sueb
    • Journal of Acupuncture Research
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    • v.22 no.3
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    • pp.155-167
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    • 2005
  • Objectives : The purpose of this study was to investigate the anti-inflammatory effect of Cobrotoxin on binding affinity of cobrotoxin with P50, $IKK{\alpa}$ and $IKK{\beta}$, activities of NF-${\kappa}B$, Cell viability of astrocyte, expressions of protein molecules of NF-${\kappa}B$ such as P50, P-$1{kappa}B$, $1{\kappa}B$ and iflammation related genes such as Cox-2, iNOS, cPLA2 in the SNP or LPS induced Inflammatory pathway of Rats' astrocytes. Methods : In this study, The expression of cytosolic phospholipase A2, Nitric oxcide, Cyclooxygenase-2 and inducible nitrogen oxide synthase was determined by western blotting with corresponding antibodies, and the generation of NF-${\kappa}B$ was assayed by EMSA method in astrocytes of rats. The Cell viability of astrocytes was determined by MTT assay, and Binding affinity of Cobrotoxin with P50, $IKK{\alpha}$ and $IKK{\beta}$ was assayed by Surface plasmon resonance analysis, and NF-${\kappa}B$ dependent luciferase activity was determined by luciferase analysis, and Uptake of cobrotoxin in astrocytes was identified by Confocal laser scanning microscope Results : 1. Compared with control, LPS-induced NF-${\kappa}B$ DNA binding activity was decreased significantly by 0.1, $0.5{\mu}g/m{\ell}$ of Cobrotoxin in Astrocyte. 2. Compared with control, LPS-induced NF-kB dependent luciferase expression was decreased significantly by 0.1, 0.5 and $1{\mu}g/m{\ell}$ of Cobrotoxin in Astrocyte. 3. Compared with control, SNP induced P50, $I{\kappa}B$ expressions in astrocyte were decreased significantly by 0.1, 0.5 and $1{\mu}g/m{\ell}$ of Cobrotoxin and P-$1{\kappa}B$ expression was decreased significantly by 0.5 and $1{\mu}g/m{\ell}$ of Cobrotoxin. 4. Compared with control, LPS induced P50, $1{\kappa}B$ expressions in astrocyte were decreased significantly by 0.5 and $1{\mu}g/m{\ell}$ of Cobrotoxin. 5. Compared with control, SNP induced Cox-2, iNOS, CPLA2 expressions in astrocyte were decreased significantly by $1{\mu}g/m{\ell}$ of Cobrotoxin. 6. Compared with control, LPS induced Cox-2, cPLA2 expressions in astrocyte were decreased significantly by 0.1, 0.5, $1{\mu}g/m{\ell}$ of Cobrotoxin and iNOS expression was decreased significantly by 0.5, $1{\mu}g/m{\ell}$ of Cobrotoxin. 7. Compared with $0.5{\mu}g/m{\ell}$ of Cobrotoxin, SNP-induced NF-${\kappa}B$ DNA bindins activity in astrocyte was increased significantly by Cobrotoxin $0.5{\mu}g/m{\ell}$ with DTT 1mM and Cobrotoxin $0.5{\mu}g/m{\ell}$ with DTT 5mM. 8. Compared with $0.5{\mu}g/m{\ell}$ of Cobrotoxin, LPS-induced NF-${\kappa}B$ DNA binding activity in astrocyte was increased significantly by Cobrotoxin $0.5{\mu}g/m{\ell}$ with DTT 1mM, Cobrotoxin $0.5{\mu}g/m{\ell}$ with DTT 5mM, Cobrotoxin $0.5{\mu}g/m{\ell}$with GSH 1mM and Cobrotoxin $0.5{\mu}g/m{\ell}$ with GSH 5mM 9. Compared with $0.1{\mu}g/m{\ell}$ of cobrotoxin, SNP induced P50 expressions in astrocyte were increased significantly by Cobrotoxin $0.5{\mu}g/m{\ell}$ with DTT 1mM, Cobrotoxin $0.5{\mu}g/m{\ell}$ with DTT 5mM Cobrotoxin $0.5{\mu}g/m{\ell}$ with GSH 1mM and Cobrotoxin $0.5{\mu}g/m{\ell}$ with GSH 5mM. 10. The uptake of the labeled cobrotoxin into the cells was shown under a confocal laser scanning microscope. cobrotoxin was uptaken into the membrane and nucleus of astrocytes. Conclusions : In summary, the present results demonstrate that cobrotoxin directly binds to sulfhydryl group of p50 and IKKS resulting In the reduction of translocation of p50 and IkB release, thereby inhibits activation of NF-${\kappa}B$, and suggest that pico to nanomolar range of cobrotoxin could inhibit the expression of genes in the NF-${\kappa}B$ signal pathway.

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Persicaria orientalis and Potentilla fragarioides Extracts Inhibit NF-κB Translocation and Nitric Oxide Production in LPS-stimulated RAW 264.7 Cells (LPS를 처리한 RAW 264.7 세포에서 털여뀌와 양지꽃 추출물의 NF-κB 활성화 및 Nitric Oxide 생성 저해)

  • Choi, Jehun;Lee, Seung-Eun;Lee, Jeong-Hoon;Kim, Geum-Sook;Noh, Hyung-Jun;Kim, Seung Yu
    • Journal of Applied Biological Chemistry
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    • v.57 no.3
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    • pp.205-210
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    • 2014
  • Persicaria orientalis (L.) Spach (Po) and Potentilla fragarioides var. major Maxim (Pf) extracts were analyzed to investigate anti-inflammation through their suppressing effects on free radicals such as reactive oxygen species (ROS). In addition, with regard to Po and Pf, an analysis was conducted of their inhibitory effect on nitric oxide, which is produced in lipopolysaccharide (LPS)-treated murine macrophage RAW 264.7 cells, and their inhibitory effect on the translocation of the nucleus of nuclear factor-kappa B (NF-${\kappa}B$). The $IC_{50}$ value of ROS, which was induced by $50{\mu}M$ 3-morpholinosydnonimine hydrochloride (SIN-1), was found to be $23.35{\pm}1.27{\mu}g/mL$ due to the effect of the Po extract, and $8.46{\pm}1.22{\mu}g/mL$ due to the effect of the Pf extract. In addition, the $IC_{50}$ value of peroxynitrite treated with the Po extract was $2.19{\pm}0.04{\mu}g/mL$, whereas that of peroxynitrite treated with the Pf extract was $0.80{\pm}0.02{\mu}g/mL$. ROS and peroxynitrite were induced by $50{\mu}M$ 3-morpholinosydnonimine hydrochloride. There was an increase in the amount of nitric oxide in the RAW 264.7 cells treated with LPS ($1{\mu}g/mL$), whereas the level of NO was observed to significantly and dose-dependently decrease in the cells treated with Po and Pf. The amount of nitric oxide produced by the group treated with $10{\mu}g/mL$ of the Pf extract was $11.45{\pm}0.57{\mu}M$. Furthermore, the Po extracts inhibited the translocation of the nucleus of NF-${\kappa}B$ in LPS-treated RAW 264.7 cells. Therefore, it is highly possible that Po and Pf have anti-inflammatory properties.

A clinical analysis of juvenile dermatomyositis; focus on clinical manifestations at diagnosis (소아기 피부근염의 임상적 고찰; 진단시 임상증상을 중심으로 한 고찰)

  • Lee, So Young;Bang, Ji Seok;Kim, Hee Seok;Kim, Joong Gon
    • Clinical and Experimental Pediatrics
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    • v.50 no.11
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    • pp.1116-1124
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    • 2007
  • Purpose : Juvenile dermatomyositis (JDM) is the most common of the idiopathic inflammatory myopathies in children. The purpose of this study is to observe demographic, initial presentations, duration of time between disease onset and diagnosis, clinical manifestations and laboratory findings at diagnosis of patients with JDM. Methods : Forty seven patients identified at Seoul National University Children's Hospital from January 1986 to May 2007. Medical records were reviewed retrospectively focusing on initial presentations, clinical manifestations and laboratory findings at the time of diagnosis of patients with JDM. Results : Male and female patients were 25 and 22, respectively and sex ratio was 1.14:1. The average age at the time of diagnosis was 6.51 years. Skin rash (94%) was the most common symptom, followed by the proximal muscle weakness (89%). The disease activity score was 10.8. The duration between the onset of the skin rash and the muscle weakness and diagnosis was 7.18 and 4.70 months, respectively. The serum muscle enzymes, LDH, AST, CK and aldolase, were elevated in the patient with JDM. Autoimmune antibodies, antinuclear antibody, anti SSA antibody and anti SSB antibody, were negative findings. Electromyography findings were consistent with JDM in 88% of the patients, the muscle biopsy was in 91% and all MRI findings were compatible with those of patients with JDM. The most common symptom besides musculocutaneous lesions was the calcinosis (62.5%). The most common site of calcinosis was the pelvic area and buttocks. Conclusion : This study shows that the major symptoms are proximal muscle weakness and cutaneous lesion, and they are important to diagnose JDM.

The Role of Uteroglobin in the Immunomodulation of Nonsmall Cell Lung Cancer Cells (비소세포 폐암세포에서 Uteroglobin의 면역 조절 기능에 대한 연구)

  • Yoon, Jung Min;Lim, Jae-Jun;Yoo, Chul-Gyu;Lee, Choon-Taek;Han, Sung Koo;Shim, Young-Soo;Kim, Young Whan
    • Tuberculosis and Respiratory Diseases
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    • v.57 no.4
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    • pp.336-344
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    • 2004
  • Background : Immunotherapy for cancer has not been successful because of several obstacles in tumor and its environment. Inappropriate secretions of cytokines and growth factors by tumors cause substantial changes in the immune responses against tumors, affording the tumors some degree of protection from immune attack. Uteroglobin (UG, Clara cell secretory protein) has been known to have anti-inflammatory, immunomodulatory and anti-cancer activities. However, in lung cancer cells, UG expression is decreased. This study investigated the role of UG in the immunomodulation of lung cancer. Methods : The UG protein was overexpressed by Adenovirus(Ad)-UG transduction in non-small cell lung cancer cell lines. The concentration of Prostaglandin $E_2$ ($PGE_2$) was measured by Enzyme Immunoassay (EIA). Peripheral blood mononuclear cells (PBMC) from whole blood were prepared with Ficoll. PBMC were cultured in RPMI 1640, supernatant of A549, or A549 with UG or NS-398. Concentration of Th 1 type and Th 2 type cytokines from PBMC were measured by ELISA. Results : UG suppressed $PGE_2$, Cyclooxygenase-2 (COX-2) product. Both Th1 type such as Interleukin-2 (IL-2), Interferon-${\gamma}$ (IFN-${\gamma}$) and Tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$) and Th2 type cytokines such as IL-10 and Tumor growth factor-${\beta}$ (TGF-${\beta}$) were increased when PBMC were cultured with supernatant of non small lung cancer cells. UG and COX-2 inhibitor, NS-398 induced normal immune response of PBMC. Although Th 1 type cytokines were increased, Th 2 type cytokines were reduced by UG. Conclusion : UG suppressed PGE2, COX-2 product. Supernatant of NSCLC induced imbalance of immune response of PBMC. However, UG reversed this imbalance. These results suggest that UG may be used in the development of immunotherapy for lung cancer.

Phytochemical Analysis and Anti-cancer Investigation of Boswellia Serrata Bioactive Constituents In Vitro

  • Ahmed, Hanaa H;Abd-Rabou, Ahmed A;Hassan, Amal Z;Kotob, Soheir E
    • Asian Pacific Journal of Cancer Prevention
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    • v.16 no.16
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    • pp.7179-7188
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    • 2015
  • Cancer is a major health obstacle around the world, with hepatocellular carcinoma (HCC) and colorectal cancer (CRC) as major causes of morbidity and mortality. Nowadays, there isgrowing interest in the therapeutic use of natural products for HCC and CRC, owing to the anticancer activity of their bioactive constituents. Boswellia serrata oleo gum resin has long been used in Ayurvedic and traditional Chinese medicine to alleviate a variety of health problems such as inflammatory and arthritic diseases. The current study aimed to identify and explore the in vitro anticancer effect of B. Serrata bioactive constituents on HepG2 and HCT 116 cell lines. Phytochemical analysis of volatile oils of B. Serrata oleo gum resin was carried out using gas chromatography-mass spectrometry (GC/MS). Oleo-gum-resin of B. Serrata was then successively extracted with petroleum ether (extract 1) and methanol (extract 2). Gas-liquid chromatography (GLC) analysis of the lipoidal matter was also performed. In addition, a methanol extract of B. Serrata oleo gum resin was phytochemically studied using column chromatography (CC) and thin layer chromatography (TLC) to obtain four fractions (I, II, III and IV). Sephadex columns were used to isolate ${\beta}$-boswellic acid and identification of the pure compound was done using UV, mass spectra, $^1H$ NMR and $^{13}C$ NMR analysis. Total extracts, fractions and volatile oils of B. Serrata oleo-gum resin were subsequently applied to HCC cells (HepG2 cell line) and CRC cells (HCT 116 cell line) to assess their cytotoxic effects. GLC analysis of the lipoidal matter resulted in identification of tricosane (75.32%) as a major compound with the presence of cholesterol, stigmasterol and ${\beta}$-sitosterol. Twenty two fatty acids were identified of which saturated fatty acids represented 25.6% and unsaturated fatty acids 74.4% of the total saponifiable fraction. GC/MS analysis of three chromatographic fractions (I,II and III) of B. Serrata oleo gum resin revealed the presence of pent-2-ene-1,4-dione, 2-methyl- levulinic acid methyl ester, 3,5- dimethyl- 1-hexane, methyl-1-methylpentadecanoate, 1,1- dimethoxy cyclohexane, 1-methoxy-4-(1-propenyl)benzene and 17a-hydroxy-17a-cyano, preg-4-en-3-one. GC/MS analysis of volatile oils of B. Serrata oleo gum resin revealed the presence of sabinene (19.11%), terpinen-4-ol (14.64%) and terpinyl acetate (13.01%) as major constituents. The anti-cancer effect of two extracts (1 and 2) and four fractions (I, II, III and IV) as well as volatile oils of B. Serrata oleo gum resin on HepG2 and HCT 116 cell lines was investigated using SRB assay. Regarding HepG2 cell line, extracts 1 and 2 elicited the most pronounced cytotoxic activity with $IC_{50}$ values equal 1.58 and $5.82{\mu}g/mL$ at 48 h, respectively which were comparable to doxorubicin with an $IC_{50}$ equal $4.68{\mu}g/mL$ at 48 h. With respect to HCT 116 cells, extracts 1 and 2 exhibited the most obvious cytotoxic effect; with $IC_{50}$ values equal 0.12 and $6.59{\mu}g/mL$ at 48 h, respectively which were comparable to 5-fluorouracil with an $IC_{50}$ equal $3.43{\mu}g/mL$ at 48 h. In conclusion, total extracts, fractions and volatile oils of B. Serrata oleo gum resin proved their usefulness as cytotoxic mediators against HepG2 and HCT 116 cell lines with different potentiality (extracts > fractions > volatile oil). In the two studied cell lines the cytotoxic acivity of each of extract 1 and 2 was comparable to doxorubicin and 5-fluorouracil, respectively. Extensive in vivo research is warranted to explore the precise molecular mechanisms of these bioactive natural products in cytotoxicity against HCC and CRC cells.

Glycoprotein Isolated from Morus indica Linne Has an Antioxidative Activity and Inhibits Signal Factors Induced by Bisphenol A in Raw 264.7 Cells (뽕잎 당단백질의 항산화능과 Raw 264.7 세포에 있어서 bisphenol A에 유도된 신호전달인자의 억제)

  • Shim, Jae-Uoong;Lee, Sei-Jung;Oh, Phil-Sun;Lim, Kye-Taek
    • Korean Journal of Food Science and Technology
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    • v.39 no.2
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    • pp.209-216
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    • 2007
  • The present study investigated anti-oxidative and anti-inflammatory activity of glycoprotein isolated from Morus Indica Linne (MIL glycoprotein). We found that MIL glycoprotein has a molecular weight of 32 kD and consists of carbohydrate (40.03%) and protein (59.97%), and that it has a strong scavenging activity against 1,1-diphenyl-2-picrylhydrazyl (DPPH), hydroxyl radical $({\cdot}OH)$, and superoxide anion $(O_2{\cdot}\;^-)$ radicals. In addition, MIL glycoprotein had a stable character and an optimal DPPH radical scavenging activity in the alkaline and neutral pH solution, and up to at 105. However, the results indicated that it has a minimal scavenging activity in the metal ionic solution ($Ca^{2+}$, $Mn^{2+}$, and $Mg^{2+}$) in the presence of EDTA. In addition, we further investigated whether MIL glycoprotein scavenges oxygen radicals and blocks inflammation-related signals in the bisphenol A (BPA)-stimulated Raw 264.7 cells. The results in this study showed that it has a character to scavenge the productions of reactive oxygen species (ROS) and nitric oxide (NO) dose-dependently. Also it blocked the activities of inflammation-related signals such as nuclear factor-kappa B ($NF-{\kappa}B$) and inducible nitric oxide synthase (iNOS). For example, it had an inhibitory effect on the activation of $NF-{\kappa}B$ (p50) and iNOS proteins at 200 ${\mu}g/mL$ MIL glycoprotein. Here, we speculate that MIL glycoprotein is one of natural antioxidants and of modulators of the BPA-induced inflammation.

The Clinical Significance of Antiphospholipid Antibodies in Korean Children with Henoch-$Sch{\ddot{o}}nlein$ Purpura (Henoch-$Sch{\ddot{o}}nlein$ 자반증에서 항인지질 항체의 임상적 의의)

  • Park, Eun-Jung;Baek, Ji-Young;Shin, Jae-Il;Lee, Jae-Seung;Kim, Hyon-Suk
    • Childhood Kidney Diseases
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    • v.13 no.2
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    • pp.146-152
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    • 2009
  • Purpose : We performed this study to evaluate the incidence and clinical significance of antiphospholipid antibodies (aPL Ab) in Korean children with Henoch-$Sch{\ddot{o}}nlein$ purpura (HSP). Methods : The medical records of 62 patients (31 boys and 31 girls) aged $46.0{\pm}3.1$ (1-16) years with a clinical diagnosis of HSP based on the EULAR/PReS criteria were reviewed retrospectively. From the years 2007 to 2009, the sera from children with acute HSP were tested for aPL Ab such as LA, anti-cardiolipin antibody and anti-${\beta}_2$ glycoprotein I antibody. Results : LA was positive in 18 (29%) of the 62 patients with HSP and We divided the patients into the two groups LA positive group (N=18) and LA negative group (N=44). There were no significant differences between the two groups with regard to abdominal pain, arthralgia and renal involvement, but LA positive group had significantly higher C-reactive protein ($4.3{\pm}7.2$ mg/dL vs. $1.3{\pm}1.8$ mg/dL, P=0.035), erythrocyte sedimentation rate ($37.5{\pm}26.2$ mm/hr vs. $25.1{\pm}22.6$ mm/hr, P= 0.039), IgM ($148.1{\pm}48.4$ mg/dL vs. $114.9{\pm}41.5$ mg/dL, P=0.024), C3 ($143.1{\pm}21.9$ mg/dL vs. $129.7{\pm}24.5$ mg/dL, P=0.048) and C4 levels ($30.9{\pm}6.3$ mg/dL vs. $24.9{\pm}7.8$ mg/dL, P=0.002) compared with LA negative group. Conclusion : We found that the incidence of positive aPL Ab tests was relatively higher in Korean children with HSP and the presence of aPL Ab was associated with acute inflammatory process of HSP. These results suggest that the aPL Ab are involved in the pathogenesis of HSP in children.

Evaluation of Characteristics of Peanut Sprout Using Korean Cultivars (땅콩 품종을 이용한 싹나물 특성 평가)

  • Pae, Suk-Bok;Ha, Tae-Joung;Lee, Myoung-Hee;Hwang, Chung-Dong;Shim, Kang-Bo;Park, Chang-Hwan;Park, Keum-Yong;Baek, In-Yeol
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.56 no.4
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    • pp.394-399
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    • 2011
  • This experiment was conducted to select suitable cultivars and evaluate growth characteristics to get basic information for sprouting peanut. On sprouting peanut, it showed a rapid increase in trans-resveratrol content that has effects on anti-cancer, anti-inflammatory, blood-sugar-lowering and other beneficial cardiovascular in mouse. For this experiment, characteristics of peanut sprouts were tested in 37 cultivars grown for 7 days at $26^{\circ}C$ temperature. There were a lots of variations in the growth characteristics among cultivars as followers : The range of 100 grain weight was 56 to 142 g, hypocotyl length was 4.3 cm to 5.8 cm, diameter of hypocotyl was 5.0 to 8.0 mm, epicotyl length was 0.8 cm to 4.6 cm, seedling ratio per seed number was 84% to 100%, weight per seedling was 4.9 g to 8.4 g, the rate of hypocotyl cleavage was 0% to 46%, the content of trans-resveratrol was $22.5\;{\mu}g/g$ to $88.2\;{\mu}g/g$ and sprout yield was 360% to 820%. The selection points considered were high sprout yield, high seedling rate, high resveratrol content, low brownish cotyledon, no hypocotyl cleavage, and fat hypocotyl etc. The best cultivar selected was 'Jokwang' that showed 7.8 mm diameter, clean cotyledon color, 100% seedling rate, 0% hypocotyl cleavage, $63.3\;{\mu}g/g$ resveratrol, and 820% sprouting yield. This cultivar was expected to be of use as a new food and nutraceutical material. Relationship between growth characteristics showed that root length had significant positive correlations with epicotyl length, resveratrol content and sprouting yield but negative correlations with hypocotyl diameter and cleavage. Hundred grain weight showed negative correlations with resveratrol content, seedling rate and sprouting yield but positively correlated with curved hypocotyl rate and hypocotyl cleavage positively. This result showed small grain seed will be more appropriate for sprouting peanut.

Serum Adiponectin Levels and Insulin Resistance in Obese Children (비만 소아의 혈중 아디포넥틴과 인슐린저항성에 관한 연구)

  • Lee, Hee-Sun;Lee, Jin;Kang, Min-Joo;Choi, Byung-Min;Lee, Kee-Hyoung
    • Clinical and Experimental Pediatrics
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    • v.48 no.5
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    • pp.481-487
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    • 2005
  • Purpose : Adiponectin, adipose tissue-specific protein, has anti-inflammatory and anti-atherogenic properties. It has been found to have a negative correlation with obesity and to play a role in modulating glucose tolerance and insulin sensitivity. Serum adiponectin concentrations are decreased in adults with obesity and type 2 diabetes. We investigated the difference in adiponectin levels between obese and non-obese children, and evaluated the relationship of serum adiponectin with body mass index(BMI), serum fasting insulin, lipid profiles and homeostasis model assessment(HOMA) in children. Methods : We measured serum adiponectin levels by radioimmunoassay in 113 children(82 obese children and 31 non-obese controls) from 8 to 15 years of age, and also checked BMI, fasting serum glucose, insulin and lipid profiles. Fasting and postprandial serum adiponectin concentrations were compared by oral glucose tolerance tests in 27 obese children. The correlations of adiponectin with BMI, insulin, low density lipoprotein(LDL)-cholesterol and HOMA were analyzed by Pearson's correlation. Results : The serum adiponectin levels were significantly lower in the obese group(19.7 mg/mL) than in the non-obese group(27.5 mg/mL)(P<0.01). Serum adiponectin concentrations were negatively correlated with BMI(r=-0.39, P<0.01), serum insulin(r=-0.28, P<0.01), LDL-C(r=-0.20, P<0.01) and HOMA(r=-0.22, P<0.01). At oral glucose tolerance tests in obese children, postprandial 2 hours adiponectin level(19.8 mg/mL) was decreased compared to fasting level(25.8 mg/mL)(P<0.01). Conclusion : Serum adiponectin concentrations were inversely related to adiposity and insulin resistance in children. We suggest the serum adiponectin level could be used as an early marker of insulin resistance in obese children.