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Hong Gu Lee(이홍구),Young Cheng Jin(김영성),Hisashi Hidari,Yun Jaie Choi(최윤재),Seon Ku Kim(김선구),Teak Soon Shin(신택순),Byung Uuk Cho(조병욱),Yong Gyun Kim(김용균),Keun Ki Kim(김근기),Hong Joo Son(손홍주),Sang Mong Lee(이상몽) 한국생명과학회 2008 생명과학회지 Vol.18 No.7
본 연구는 정상으로 단백질을 급여한 거세면양에 있어서 에너지 첨가가 GHRP-2투여에 대한 혈장 IGF-1 및 IGFBPs에 대한 반응과, 고에너지 급여에 따른 GHRP-2투여가 hepatic GH 수용체에 미치는 영향을 검증하기 위하여 실시하였다. 시험 결과 HENP (CP 0.34 ㎏, TDN 1.83 ㎏/day DM intake)처리기간 동안 혈장 IGF-1 과 39-42kDa IGFBP-3수준은 LENP (CP 0.32 ㎏, TDN 0.87 ㎏/day DM intake)기간에 비하여 높게 나타났으나 (P<0.05), 혈장 34 kDa IGFBP-2와 24 kDa IGFBP-4는 영양처리에 의해 영향을 받지 않았다. 각 영양처리 기간동안 GHRP-2 (12.5 μg/㎏ body weight/day)투여는 혈장 GH 반응이 촉진되었으며(P<0.05), 혈장 GH 평균 함량과 AUC증가에 있어서는 LENP처리 기간에 비하여 HENP처리기간에서 유의적으로 높게 나타났다(P<0.01). 특히 HENP에서 7일간 GHRP-2투여에 의한 일중 혈장 IGF-1 변화양상을 조사한 결과 투여 2, 6 및 7일에서 뚜렷한 증가양상을 보였다(P<0.05). 이에 반하여 LENP에서는 오직 투여 3일째에서 Saline구에 비하여 유의적인 증가를 확인하였다(P<0.05). IGFBPs의 ligand blotting 결과 HENP구에서 혈장 39-43 kDa IGFBP-3의 수준의 증가가 투여 6일과 7일에서 관찰되었으나 혈장 IGFBP-2수준은 두 영양처리시기에서 유의적인 차이를 관찰하지 못했다. 아울러 HENP구에 있어서 간세포막에 <SUP>125</SUP>I-oGH의 결합력을 측정한 결과 GHRP-2투여에 의한 영향은 관찰되지 않았다. 이와 같은 결과는 거세면양에 있어서 단백질과 에너지 사이의 영양적 균형은 내인성 GH/IGF-1 axis는 물론 혈장 IGFBP-3수준의 변화에 영향을 미치고 있음을 시사한다. The purpose of this study was to determine the effect of energy supplement on responses of plasma insulin-like growth factor (IGF)-1 and IGF binding proteins (IGFBPs) to growth hormone-releasing peptide-2 (GHRP-2) administration in normal protein-fed wethers, and to observe the effect of GHRP-2 treatment on hepatic growth hormone (GH) receptor in well-fed wethers. Plasma IGF-1 and 39-42 kDa IGFBP-3 during the HENP (CP, crude protein 0.34 and TDN, total digestible nutrients 1.83 ㎏/day DM, dry matter intake) treatment period were higher than in the LENP (CP 0.32 ㎏ and TDN 0.87 ㎏/day DM intake) period (P<0.05). The response of GH was stimulated by GHRP-2 (12.5 ㎍/㎏ body weight/day) administration during both of the feed treatment periods (P<0.05). The area under curve (AUC) increment and average concentration of GH (0-180 min) with GHRP-2 administration was higher during HENP treatment than LENP treatment (P<0.01). During the HENP treatment period from day 1 to day 7 of twice daily GHRP-2 treatment, the plasma IGF-1 increment was increased on days 2, 6 and 7 of GHRP-2 administration (P<0.05). On the basis of ligand blotting, the proportions of plasma 39-43 kDa IGFBP-3 during the HENP treatment period only showed a significant difference on days 6 and 7 with GHRP-2 administration. No significant difference in the specific binding of 125I-labeled oGH to hepatic membranes was detected between the saline and GHRP-2 treatments of the HENP-fed wethers. These results suggest that the nutritional balance between energy and protein may affect the endogenous GH / IGF-1 axis as well as plasma IGFBP-3 levels.
단위가축영양 : 토종 육계에 있어서 복합 생균제 및 면역증강제의 항생제 대체효과
이상범 ( Sang Bum Lee ),김병극 ( Byung Kuk Kim ),박창호 ( Chang Ho Park ),박건현 ( Gun Hyun Park ),김영성 ( Yong Cheng Jin ),강한석 ( Han Suk Kang ),김영철 ( Young Chul Kim ),김윤칠 ( Youn Chil Kim ),배승철 ( Sung Chul Bai ),김선 한국동물자원과학회(구 한국축산학회) 2011 한국축산학회지 Vol.53 No.5
This study was conducted to investigate the effects of dietary probiotics and immunomodulator on growth performance, carcass characteristics, fecal NH3 content and pathogenic bacteria counts in ileum and cecum and ileum of broiler chicken(Korean native chicken, HanHyup No.3). A total of 120(day-old) chicks were randomly divided into 5 treatments with 3 replicates and there were 8 birds per replicate. Dietary treatments consisted of five diets; the corn-soybean based control diet(C), the diet containing antibiotics (Avilamycin) 10 ppm(T1), the diet containing probiotics 1[(Lactobacillus(4.45×10(6))+yeast(1.51×10(6))+Bacillus subtilis (3.50×10(5))] at 0.5% level(T2), probiotics 2 [(Lactobacillus (6.70×10(7))+yeast(3.10×10(6))] at 0.5% level in diet(T3), and the diet containing probiotics 3[T2+β-glucan+organic acid](T4) and raised for 9 weeks. There were no significant differences among treatments in weight gain, feed intake and feed conversion. Carcass ratios of broilers were higher in T3 and T4 than other treatments, however, the differences were non-significant. Internal organs and liver, heart weight were significantly increased in T4 (p<0.05) compared to other treatments. The fecal NH3 gas content was decreased(p<0.05) in antibiotics fed group than others. However, probiotic fed groups were not different when compared with control. The number of Salmonella and E. coli in cecum were reduced in the group supplemented with probiotics and immunomodulator compared to the antibiotics(p<0.05). In this experiment, we showed that diets containing pro-biotics and immunomodulator were capable of an alternative to antibiotics.