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Effect of Dietary Anti-oxidant Supplementation on Telomere Length and Egg Quality in Laying Hens

산란계에 항산화물질 급여가 텔로미어 함량 및 난질에 미치는 영향

  • Lee, M.H. (Sangol Farm) ;
  • Lee, S.H. (Sangol Farm) ;
  • Kim, Y.J. (Department of Animal Science & Biotechnology, Jinju National University) ;
  • Ko, Y.H. (Department of Animal Science & Biotechnology, Jinju National University) ;
  • Jang, I.S. (Department of Animal Science & Biotechnology, Jinju National University) ;
  • Moon, Y.S. (Department of Animal Science & Biotechnology, Jinju National University) ;
  • Choi, Y.H. (Department of Animal Science, Division of Applied Life Science, and Institute of Agriculture and Life Sciences, Gyeongsang National University) ;
  • Sohn, S.H. (Department of Animal Science & Biotechnology, Jinju National University)
  • 이민희 (산골농장) ;
  • 이상호 (산골농장) ;
  • 김영주 (진주산업대학교 동물생명과학과) ;
  • 고영현 (진주산업대학교 동물생명과학과) ;
  • 장인석 (진주산업대학교 동물생명과학과) ;
  • 문양수 (진주산업대학교 동물생명과학과) ;
  • 최양호 (경상대학교 대학원 응용생명과학부, 농업생명과학연구원, 농생명학부) ;
  • 손시환 (진주산업대학교 동물생명과학과)
  • Published : 2008.09.30

Abstract

There are many kinds of anti-oxidant materials in natural plant resources. The Siberian ginseng and Eucommia are well known as anti-oxidant and medicinal plants. To investigate the effect of their anti-oxidant-like activity on telomere quantity and egg quality, diets containing Siberian ginseng leaf and Eucommia leaf at 0.5% and 1% were given Hyline Brown commercial laying hens during two periods of age: 20 to 30 wks and 60 to 70 wks. The amount of telomere in lymphocyte, liver, ovary, heart and lung was analyzed by quantitative fluorescence in situ hybridization using telomeric DNA probe. Egg weight, albumin height, Haugh unit, egg yolk color, egg shell color, egg shell thickness, egg shell weight and egg shell density were measured to analyze egg quality. The chickens consuming diets Siberian ginseng and Eucommia had higher telomeric DNA in lymphocytes than control chickens in younger layers whereas no significant differences were detected in all target cells analyzed from older layers. Egg quality was increased in younger hens with dietary supplementation as determined by egg weight, albumin height and Haugh unit but there were no effects in older hens. These results imply that dietary supplementation of Siberian ginseng and Eucommia in layers improves bio-activity and egg quality at early laying stage.

천연식물자원들 중에 항산화 물질로 알려진 다양한 소재들이 소개되고 있다. 이들 중 가시오갈피와 두충과 같은 소재는 항산화 효과뿐만 아니라 약용으로서도 널리 입증된 천연식물성 소재이다. 따라서 본 연구에서는 실용 산란계에 이들 소재의 첨가 급여가 개체의 생리활성도 및 계란 품질에 미치는 영향을 알아보고자 텔로미어의 함량을 비교 분석하고, 생산된 계란의 난질을 조사하였다. 시험 분석은 하이라인 브라운 상업용 실용 산란계 360수를 이용하여 가시오갈피 및 두충을 각각 사료 급여량 대비 0.5%와 1%를 첨가하였다. 급여 시기는 초기 산란기($20{\sim}30$주령) 및 후기 산란기($60{\sim}70$주령)로 제한하고, 30주령 말과 70주령 말 개체의 혈액 및 각종 조직들의 텔로미어 함유율과 생산한 계란의 품질을 양적형광접합보인법(Q-FISH) 및 난질 분석기로 분석하였다. 가시오갈피 및 두충 급여에 따른 각 조직별 텔로미어 함량을 비교 분석한 바 산란 초기에 증식성 세포인 백혈구 내 텔로미어 함유율은 모든 첨가 급여구가 무 첨가구에 비해 현저히 높은 함량을 보이고 비 증식성 세포에 있어서는 처리구별 차이가 없었다. 그러나 산란 후기 시 첨가 급여에 따른 모든 조직들의 텔로미어 함량 차이는 없는 것으로 나타났다. 가시오갈피 및 두충의 첨가 급여가 난질에 미치는 영향을 살펴본 바 산란 초기에 난중, 난백고, 호우 유니트는 첨가 급여 처리구가 무처리구에 비해 유의적으로 높은 결과를 보였고, 난각 두께, 난각색, 난황색, 난각 무게 및 난각 밀도는 처리구별 차이가 없었다. 반면 산란 후기에서는 급여처리간 난질에 미치는 효과는 없는 것으로 나타났다. 이는 항산화 물질의 급여가 성장기 개체의 생리 활성도 및 생체기능을 향상 시킨다는 것을 강력히 뒷받침하는 증거로서 산란계에 있어 산란 초기에 소량의 가시오갈피와 두충의 첨가는 체내에 미치는 독성 없이 개체의 기능성 증가와 더불어 난 형성에 매우 긍정적 영향을 미치는 것으로 사료된다.

Keywords

References

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