Characterization of Melanin-concentrating Hormone from Olive Flounder (Paralichthys olivaceus)

In Young Chung(정인영),Jeong Min Jeon(전정민),Young Hwan Song(송영환) 한국생명과학회 2018 생명과학회지 Vol.28 No.3

멜라닌 농축 호르몬(melanin-concentrating hormone, MCH)은 17개의 아미노산으로 구성된 환형의 시상하부 펩티드로 색소 침착의 조절인자로서 연어에서 처음 분리되었다. 포유동물의 MCH는 19개의 아미노산으로 구성되어 있으며 섭식 및 에너지 항상성을 조절하는데 관여한다. 본 연구에서는 양식넙치의 다양한 조직에서 MCH 유전자의 발현 분포, 멜라닌 함유 세포의 집적, 포유동물 MCH 수용체와 양식넙치 MCH의 상호작용을 조사하였다. Real-time qPCR을 이용하여 뇌, 정소, 난소에서 MCH 유전자의 발현이 나타나는 것을 확인하였고, 수정 후 발달단계에서도 MCH 유전자의 발현을 확인할 수 있었다. 합성된 연어 sMCH, 포유류 hMCH, 양식넙치 fMCH, dN-fMCH, dC-fMCH를 양식 넙치의 표피에 처리했을 때 다양한 농도에 따라 멜라닌 함유 세포의 집적이 다양하게 나타났다. 연어 sMCH, 포유류 hMCH에 비해 양식넙치 fMCH의 멜라닌 함유세포의 집적도가 36~99.85%로 비역가를 나타났으나 양식넙치 dN-fMCH, dC-fMCH를 처리한 경우 양식넙치 fMCH에 비해 높은 농도에서 집적이 나타나고 짧은 시간에 분산되었다. 또한, 인간 MCH 수용체와 쥐 MCH 수용체가 발현된 포유동물의 세포주에 양식넙치 fMCH를 처리하여 각 수용체와 결합하는 것을 확인하였다. 이러한 결과는 어류에서 발현되는 MCH가 포유동물의 MCH와 유사한 구조를 가지고 있어 MCH 수용체에 대한 새로운 리간드로서 제공될 수 있으며, 향후 어류의 MCH 수용체에 확대 적용할 수 있을 것이다. The melanin-concentrating hormone (MCH), a cyclic hypothalamic peptide composed of 17 amino acids, was initially identified in chum salmon (Oncorhynchus keta) as a regulator of pigmentation. Mammalian MCHs are cyclic hypothalamic peptides composed of 19 amino acids that regulate food intake and energy homeostasis. The present study examined not only MCH expression of different tissues but also the melanohore aggregation and intracellular Ca<SUP>2+</SUP> influx of fMCH and the other MCH. Real-time qPCR showed that MCH expressed specially in the brain, gonad, and ovary, and expression of MCH was observed during the developmental stages. In the application of synthetic fMCH and both types of synthetic fMCH, dN-fMCH and dC-fMCH, scale melanophore induced significant changes in aggregation activity with various concentrations of MCH. Also, compared to hMCH and sMCH, fMCH exhibited a 36~99.85% increase in relative potency (%), whereas aggregation of dN-fMCH and dC-fMCH remained in a high concentration. However, dispersion was induced rapidly according to be low concentration of dN-fMCH and dC-fMCH. We show that fMCH and its derivates were bound human MCHR1 and rat MCHR expressed in HEK293T cells with nano-molar affinity and are likely to be ligand-induced to mobilize intracellular Ca<SUP>2+</SUP>. These results may provide new ligands for binding assay with MCHew ligands, as a structure similar to the mammalian MCH structure was discovered in fish. Once the fMCH receptor system is in place, it can be compared to the MCH system of mammals in terms of MCH function.

Melanin-concentrating Hormone-1 Receptor (MCH-1) Antagonism of the Leaves Extract from Morus alba

Byung Koo Oh,오광석,이성호,서호원,최연희,최재석,김영섭,이병호,권광일,유시용 한국생약학회 2009 Natural Product Sciences Vol.15 No.1

The present study was performed to investigate the binding affinity of the ethanol extract from the leaves of Morus alba (EMA) and some EMA related plant materials (EMA-D, EMA-DM) for melaninconcentrating hormone-1 receptor (MCH-1) and also to examine the antagonistic effect of them for the recombinant MCH-1 receptor expressed in CHO cells. EMA, dichloromethane fraction (EMA-D) and EMA-DM exhibited high affinity for mammalian MCH receptor in receptor binding assays (IC50 value: 2.3, 1.6 and 1.0 µg/ ml, respectively). Other plant materials (MMA-D, MMA-DM) obtained from methanol extracts from the leaves of Morus alba (MMA) also exhibited high affinity for mammalian MCH receptor, even though the IC50 values of them were lower than those of EMA-D and EMA-DM. In Chinese hamster ovary (CHO) cells expressing human MCH-1, EMA-DM and EMA-D significantly inhibited MCH-induced intracellular Ca2+ increase (IC50 values: 16.5 and 22.7 µg/ml, respectively). These results clearly indicate that the ethanol extract from the leaves of Morus alba (EMA) and some EMA related plant materials (EMA-D, EMA-DM) are novel selective MCH-1 receptor antagonist, respectively.

뇌하수체 선종환자의 수술 전 호르몬 변화와 propofol, remifentanil 마취제 요구량의 상관관계

김은미,최은미,최승호,민경태,허상백 대한마취통증의학회 2010 Anesthesia and pain medicine Vol.5 No.2

Background:Anesthetic requirements are affected by the preoperative levels of some hormones.This study investigated to identify the hormonal status such as plasma level and maximal secretary capacity correlating with propofol and remifentanil requirements in pituitary adenoma patients who show various hormonal secretory states perioperatively. Methods:From 51 adult female pituitary adenoma patients, preoperative basal values and maximal stimulated levels of various hormones related to the axis of hypothalamus-pituitary-target organs on combined pituitary function test were recorded.Total intravenous anesthesia using target controlled infusion with propofol and remifentanil was administered.The effect-site concentration (Ce) of propofol reaching anesthetic induction and the consumed dosages of propofol and remifentanil during operation were measured.Anesthetic maintenance was controlled within 30% of preanesthetic hemodynamic variables by remifentanil and within ranges of BIS 45 ± 10 by propofol. Spearman correlations between hormonal status and anesthetic requirements such as propofol Ce for induction, total consumed doses of propofol and remifentanil were performed with a statistical significance at P of 0.05. Results:The preoperative basal level of ACTH was correlated positively with propofol induction Ce and maintenance dose, and the maximal secretory capacity of prolactin also correlated positively with propofol induction Ce.Remifentanil consumption dose was not related with any hormones measured regardless of either preoperative basal levels or maximal secretory levels. Conclusions:Propofol requirements may be related with preoperative plasma level of ACTH or maximal secretory capacity of prolactin.

Cytokine responses to moderate-intensity leg cycling exercise in follicular and luteal menstrual cycle phases

Suh, Sang Hoon,Gretchen, A. Casazza,George, A. Brooks 한국운동과학회 2003 운동과학 Vol.12 No.4

서상훈. Gretchen A. Casazza·George A. Brooks. 중강도 자전거 운동시 생리주기에 따른 싸이토카인의 반응, 운동과학, 제12권 제4호, 631-640, 2003. 본 연구는 식후 3시간 휴식을 취한 여성을 대상으로 운동강도와 생리주기가 혈장 TNF-α와 Interleukin-6 농도에 미치는 영향을 조사하였다. 정상적인 생리 주기 (23-24 일)를 가진 건강하고 훈련되지 않은 8명의 여성이 휴식 (180 분)과 운동 (45%와 65%, VO₂peak에서 60 분간 자전거 에르고미터를 이용한 운동) 중에 난포기 (FP, 3-9 일)와 황체기 (LP, 18-24 일)에서 연구하였다. 자전거 에르고미터 운동은 런닝시 나타나는 플라이오메트릭 근수측의 근육손상 가능성을 제한하기 위해서 이용되었다. 실험 하루 전 음식섭취는 조절하였다. 혈장 TNF-α와 Interleukin-6 농도는 일라이자 (EISA, Enzyme-Linked ImmunoSorbent Assay)로 측정하였다. 헐장 TNF-α와 Interleukin군 농도는 운동 중에 약간 증가하였으나, 유의한 차이를 보이지 않았다 (p>.05). 혈장 TNF-α와 Interleukin군 농도는 난포기에 비해 황체기에서 낮게 나타나는 경향을 보였지만, 유의한 차이는 발견되지 않았다 (p>,05).운동강도 (45%와 65% V0₂peak)에 따른 혈장 TNF-α와 Interleukin-6 농도 변화는 유의한 차이를 보이지 않았다 (p>.05). 따라서 본 연구의 결과는 첫째, 중강도 자전거 운동은 젊고 건강한 여성의 염증 반응 사이토카인 (cytokine) 변화를 유발할 가능성이 희박하고, 둘째, 여성 난소 스테로이드 호르몬은 휴식과 운동 중에 철장 사이토카인 반응을 변화시키지 않은 것으로 사료된다. Seo, S.H., G.A. Casazza., G.A. Brooks. Cytokine responses to moderato-intensity leg cycling exorcise in foliicular and luteal menstrual cycle phases. Exercise Science, 12(4): 631-640, 2003. We examined the effects of exorcise Intensity and menstrual cycle phases on plasma concentrations of tumor necrosis factor (TNF-a) and interleukin-6 (IL-6) during rest and exorcise in rested 3-h postabsorptive women. Eight healthy, untrained women with normal menstrual cycles (24-34 days) were studied under conditions of rest (180 min) and exorcise(60 min, leg ergometer cycling at 45 and 65% peak oxygen consumption) during follicular (FP; cycle days 3-9) and luteal(LP; cycle days 18-24) phases. Leg cycling was used to eliminate the possibility of muscle damage from plyometric muscle contractions as occur in running. Dietary intake was controlled for the 24-h immediately preceding each trial. The plasma concentrations of TNF-a and IL-6 were measured by Enzyme-Linked immunoSorbent Assay (ELISA). There was a slight increasen plasma concentrations of TNF-aand IL-6 during exorcise, as compared to rest, but this difference was not significant (p>.05). The plasma levels of TNF-a and IL-6tended to be lower In LP than in FP, but no significant difference was found (p>.05). There were no significant differences in the plasma concentrations of TNf-a and IL-6 due to exorcise Intensity (i.e., exorcise at 45 and 65% V0₂peak). These results are interpreted to mean that moderate-intensity bicycle exorcise is unlikely to induce a change in inflammatory cytokine levels in young healthy women, and that plasma cytokine response during rest and exorcise does not appear to be altered by overian steroid hormones.

Salvaging effect of triacontanol on plant growth, thermotolerance, macro-nutrient content, amino acid concentration and modulation of defense hormonal levels under heat stress

Waqas, M.,Shahzad, R.,Khan, A.L.,Asaf, S.,Kim, Y.H.,Kang, S.M.,Bilal, S.,Hamayun, M.,Lee, I.J. Gauthier-Villars ; Elsevier Science Ltd 2016 Vol. No.

<P>In this study, it was hypothesized that application of triacontanol, a ubiquitous saturated primary alcohol, at different times-before (TBHS), mid (TMHS), and after (TAHS) heat stress-will extend heat stress (HS) protection in mungbean. The effect of triacontanol on the levels of defense hormones abscisic acid (ABA) and jasmonic acid (JA) was investigated along with the plant growth promotion, nutrient and amino acid content with and without heat stress. Heat stress caused a prominent reduction in plant growth attributes, nutrient and amino acid content, which were attributed to the decreased level of ABA and JA. However, application of triacontanol, particularly in the TBHS and TMHS treatments, reversed the deleterious effects of HS by showing increased ABA and JA levels that favored the significant increase in plant growth attributes, enhanced nutrient content, and high amount of amino acid. TAHS, a short-term application of triacontanol, also significantly increased ABA and JA levels and thus revealed important information of its association with hormonal modulation. The growth-promoting effect of triacontanol was also confirmed under normal growth conditions. To the best of our knowledge, this study is the first to demonstrate the beneficial effects of triacontanol, with or without heat stress, on mungbean and its interaction with or regulation of the levels of defense hormones. (C) 2015 Elsevier Masson SAS. All rights reserved.</P>

Elevated thyroid hormones caused by high concentrate diets participate in hepatic metabolic disorders in dairy cows

Chen Qu,Wu Chen,Yao Zhihao,Cai Liuping,Ni Yingdong,Mao Shengyong 아세아·태평양축산학회 2022 Animal Bioscience Vol.35 No.8

Objective: High concentrate diets are widely used to satisfy high-yielding dairy cows; however, long-term feeding of high concentrate diets can cause subacute ruminal acidosis (SARA). The endocrine disturbance is one of the important reasons for metabolic disorders caused by SARA. However, there is no current report about thyroid hormones involved in liver metabolic disorders induced by a high concentrate diet. Methods: In this study, 12 mid-lactating dairy cows were randomly assigned to HC (high concentrate) group (60% concentrate of dry matter, n = 6) and LC (low concentrate) group (40% concentrate of dry matter, n = 6). All cows were slaughtered on the 21st day, and the samples of blood and liver were collected to analyze the blood biochemistry, histological changes, thyroid hormones, and the expression of genes and proteins. Results: Compared with LC group, HC group showed decreased serum triglyceride, free fatty acid, total cholesterol, low-density lipoprotein cholesterol, increased hepatic glycogen, and glucose. For glucose metabolism, the gene and protein expression of glucose-6- phosphatase and phosphoenolpyruvate carboxykinase 1 in the liver were significantly up-regulated in HC group. For lipid metabolism, the expression of sterol regulatory element-binding protein 1, long-chain acyl-CoA synthetase 1, and fatty acid synthase in the liver was decreased in HC group, whereas carnitine palmitoyltransferase 1α and peroxisome proliferator activated receptor α were increased. Serum triiodothyronine, thyroxin, free triiodothyronine (FT3), and hepatic FT3 increased in HC group, accompanied by increased expression of thyroid hormone receptor (THR) in the liver. Conclusion: Taken together, thyroid hormones may increase hepatic gluconeogenesis, β-oxidation and reduce fatty acid synthesis through the THR pathway to participate in the metabolic disorders caused by a high concentrate diet. Objective: High concentrate diets are widely used to satisfy high-yielding dairy cows; however, long-term feeding of high concentrate diets can cause subacute ruminal acidosis (SARA). The endocrine disturbance is one of the important reasons for metabolic disorders caused by SARA. However, there is no current report about thyroid hormones involved in liver metabolic disorders induced by a high concentrate diet.Methods: In this study, 12 mid-lactating dairy cows were randomly assigned to HC (high concentrate) group (60% concentrate of dry matter, n = 6) and LC (low concentrate) group (40% concentrate of dry matter, n = 6). All cows were slaughtered on the 21st day, and the samples of blood and liver were collected to analyze the blood biochemistry, histological changes, thyroid hormones, and the expression of genes and proteins.Results: Compared with LC group, HC group showed decreased serum triglyceride, free fatty acid, total cholesterol, low-density lipoprotein cholesterol, increased hepatic glycogen, and glucose. For glucose metabolism, the gene and protein expression of glucose-6-phosphatase and phosphoenolpyruvate carboxykinase 1 in the liver were significantly up-regulated in HC group. For lipid metabolism, the expression of sterol regulatory element-binding protein 1, long-chain acyl-CoA synthetase 1, and fatty acid synthase in the liver was decreased in HC group, whereas carnitine palmitoyltransferase 1α and peroxisome proliferator activated receptor α were increased. Serum triiodothyronine, thyroxin, free triiodothyronine (FT3), and hepatic FT3 increased in HC group, accompanied by increased expression of thyroid hormone receptor (THR) in the liver.Conclusion: Taken together, thyroid hormones may increase hepatic gluconeogenesis, β-oxidation and reduce fatty acid synthesis through the THR pathway to participate in the metabolic disorders caused by a high concentrate diet.

Luteinizing hormone beta gene polymorphism and its effect on semen quality traits and luteinizing hormone concentrations in Murrah buffalo bulls

Reen, Jagish Kour,Kerekoppa, Ramesha,Deginal, Revanasiddu,Ahirwar, Maneesh Kumar,Kannegundla, Uday,Chandra, Satish,Palat, Divya,Das, Dayal Nitai,Kataktalware, Mukund Amritrao,Jeyakumar, Sakthivel,Islo Asian Australasian Association of Animal Productio 2018 Animal Bioscience Vol.31 No.8

Objective: Present investigation was aimed to study the Single Nucleotide Variants of the luteinizing hormone beta ($LH{\beta}$) gene and to analyze their association with the semen quality (fresh and post-thawed frozen semen) and luteinizing hormone (LH) concentrations in Murrah buffalo bulls. Methods: Polymerase chain reaction-single stranded conformational polymorphism (PCR-SSCP) and Sanger sequencing method is used to study genetic variability in $LH{\beta}$ gene. LH assay was carried out using enzyme-linked immunosorbent assay method. A fixed general linear model was used to analyze association of single nucleotide polymorphism (SNP) of $LH{\beta}$ gene with semen quality in 109 and LH concentrations in 80 Murrah bulls. Results: $LH{\beta}$ gene was found to be polymorphic. Total six SNPs were identified in $LH{\beta}$ gene g C356090A, g C356113T, g A356701G, g G355869A, g G356330C, and g G356606T. Single Stranded Conformational Polymorphism variants of pattern 2 of exon 1+pattern 2 of exon 2+pattern 1 of exon 3 had highly significant (p<0.01) effect on sperm concentration (million/mL), percent mass motility, acrosome integrity and membrane integrity in fresh and frozen semen whereas significant (p<0.05) effect was observed on percent live spermatozoa. SSCP variants of pattern 2 of exon 1+pattern 2 of exon 2+pattern 1 of exon 3 had highly significant (p<0.01) effect on luteinizing hormone concentrations too. Conclusion: The observed association between SSCP variants of $LH{\beta}$ gene with semen quality parameters and LH concentrations indicated the possibilities of using $LH{\beta}$ as a candidate gene for identification of markers for semen quality traits and LH concentrations in Murrah buffaloes.

EFFECTS OF OVARY TYPE, OOCYTE GRADE, HORMONE, SPERM CONCENTRATION AND FERTILIZATION MEDIUM ON IN VITRO MATURATION, FERTILIZATION AND DEVELOPMENT OF BOVINE FOLLICULAR OOCYTES

Im, K.S.,Kim, H.J.,Chung, K.M.,Kim, H.S.,Park, K.W. Asian Australasian Association of Animal Productio 1995 Animal Bioscience Vol.8 No.2

In vitro embryo production (IVP) is affected by various factors during in vitro maturation, fertilization, and development. In this experiment, the effect of ovary type, quality of follicular oocyte, medium used for fertilization, presence of hormone in medium, sperm concentration on in vitro maturation and fertilization were examined for effective IVP. In vitro maturation was carried out using TCM-199 supplemented with 15% FCS and hormones in 5% $CO_2$ incubator for 24h. In vitro fertilization was performed with frozen-thawed sperm in modified mTALP medium containing 0.3% BSA, $10{\mu}g/ml$ heparin, and 5mM/ml caffeine for 24h. The fertilized embryos were co-cultured on monolayer of cumulus cells in TCM-199. When oocytes were collected from functionally active and inactive ovaries, maturation rate was 76.9 and 7.7%, respectively. When oocytes were classified morphologically to good and poor grades, maturation rate was 75 and 58.8%, respectively. FSH + LH + $E_2$ (86.4%) showed higher maturation rate than control (53.0%) and FSH (73%). The fertilization rate was 28.2, 100 and 91.7% in $1.6{\times}10^5$, $5.0{\times}10^5$ and $10.0{\times}10^5$ sperm concentration per ml. When oocytes were fertilized in mTALP and BO media, fertilization and cleavage rates of oocytes in mTALP were higher (84.3 and 56.9%) than those (67.4 and 23.3%) in BO medium. In this experiment, in vitro maturation, fertilization and development of oocytes were affected by type of ovary, grade of oocyte, hormones, sperm concentration and fertilization medium.

축구선수의 Detraining과 Retraining이 혈청지질 및 호르몬농도에 미치는 영향

정정화,박재현,채종훈,성혜련,황지인,윤미숙,노금선,윤종관,윤영학,노순덕,정경숙,박일규,김은희,박현태,박상갑 대한스포츠의학회 1999 대한스포츠의학회지 Vol.17 No.1

The purpose of this study was to investigate the effects of detraining and retraining on serum lipid and hormones in soccer players. Subjects were seven male high-school soccer players. V˙O_2max was determined for each subjects by administering a treadmill test(initial speed: 90m/min, grade: 5%, increasing speed per 3 min: 30m/min). Serum lipid(T-C, TG, HDL-C LDL-C) and hormones(epinephrine, norepinephrine, growth hormones, cortisol) were assayed pre and post detraining in 10, 20, 30 days after retraining. The repeated ANOVA was used to determine significant differences. The 0.05 level of significance was as critical level for the study. The results of the study were as follows: 1. V˙O_2max(ml/min) were 3576.3±204.2ml/min pre detraining, 3234.1±198.9 ml/min post detraining. There are significant(p<.05) difference between pre and post detraining. In 10, 20, 30 days after retraining, V˙O_2max(ml/min) were 3601.4±170.9 ml/min. There were significantly(p<.05) increased in retraining periods. 2. V˙O_2max(ml/kg/min) were significantly(p<.05) decreased from 62.3±2.9 ml/kg/min to 55.9±4.7 ml/kg/min in detraining. In 10, 20, 30 days after retraining, V˙O_2max(ml/kg/min) were 62.4±3.4ml/kg/min, 62.7±2.3ml.kg/min, 67.3±7.2ml/kg/min respectively. There were significantly(p<.05) increased in retraining periods. 3. T-C were significantly (p<.05) increased from 166.6±8.5mg/dl to 175.3±10.3 mg/dl in detraining. In 10, 20, 30 days after retraining, T-C were 160.1± 3.2mg/dl, 156.7±3.7mg/dl, 140.3±9.0mg/dl. There were significantly(p<.05) decreased in retraining periods. 4. HDL-C were 61.4±6.6mg/di pre detraining, 5.3±6.6mg/dl post detraining. There are significant(p<.05) difference between pre and post detraining. In 10, 20, 30 days after retraining, HDL-C were 56.9±7.1mg/dl, 56.4±9.2mg/dl, 57.7±9.1mg/dl respectively. There were no significant difference in retraining periods. 5. The hormones(epinephrine. norepinephrine, growth hormone, cortisol) were changed as same patterns. Epinephrine were 26.0±7.0[g/ml pre detraining, 24.6±3.2pg/ml post detraining. In 10, 20, 30 days after retraining, epinephrine were 26.9±5.6pg/ml, 30.6±6.2pg/ml, 29.4±5.6pg/ml respectively. There were no significant difference in retraining periods. In conclusion, HDL-C, epinephrine, norepinephrine, growth hormone and cortisol were decreased, T-C, LDL-C and TG were increased in detraining. But HDL-C, epinephrine, norepinephrine, growth hormone and cortisol were increased, T-C, LDL-C and TG were decreased in retraining.

어성초 · 삼백초 발효추출액 복용과 유산소성 트레이닝이 정자(精子) 활성 및 성호르몬 농도에 미치는 영향

남상석(Nam, Sang-Seok),박훈영(Park, Hun-Young),선우섭(Sunoo, Sub),문황운(Moon, Hwang-Woon) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.4

The present study investigated the physiological effects of native plants such as Houttuynia cordata Thnub · Saururus Chinensis Baill and the aerobic excercise for the generative functions. To accomplish these, the study was conducted with the donated sperm from 48 campus volunteers and 24 volunteers whose sperm motilities were under 50% or sperm counts were under 50 million/ml were selected. The 24 volunteers were carried out doing aerobic exercise and taking fermented Houttuynia cordata Thnub · Saururus Chinensis Baill extract at the same time. After one month, the changes of the sperm motility and the sex-hormone concentration were observed. The results of the study were as follows. Firstly, Interactive effect was shown between the experimental group and the control group when checking their weights, FT and 5α-DHT before and after aerobic exercise. The control group decreased body fat percentage and body fat mass after aerobic exercise. Secondly, Both the experimental group and the control group significantly decreased sperm counts after aerobic exercise. Thirdly, Both the experimental group and the control group significantly increased VCL, VSL and PWC75%HRmax after aerobic excercise. Fourthly, Both the experimental group and the control group significantly decreased FSH and LH after aerobic exercise. Lastly, Both the experimental group and the control group significantly increased testosterone after aerobic exercise. In conclusion, after aerobic exercise for short period of time, the group of taking fermented Houttuynia cordata Thnub · Saururus Chinensis Baill extracts (the experimental group) showed no significant effect for the sperm motility and the sex-hormone concentration as compared with the control group.