Bonine과 Caprine유로부터 Glycomacropeptide 분리: 트립신가수분해물의 혈소판응집억제 효과
Seperation of glycomacropeptide from bonine and caprine milk: Effect of its tryptic hydrolysate on the inhibition of platelet aggregation
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본 연구는 홀스타인, 한국재래산양 및 한우유로부터 glycomacropeptide(GMP)를 분리하였으며, 각 GMP의 trypsin 가수분해물의 혈소판응집 억제 효과를 in vitro 상에서 알아보았다. 홀스타인, 한국재래산양 및 한우의 GMP는 분자량이 모두 약 20 KDa이었으며, sialic acid 함량은 각각 36.86±2.36, 37.98±1.27 및 31.19±1.87㎍/mg이었다. 또한 모든 개체의 GMP에서 tyrosine이 검출되었다. 홀스타인, 한국재래산양 및 한우 GMP의 trypsin 가수분해물에 의한 혈소판 응집 억제율은 반응 30초에 4.02, 5.51 및 12.77%로 각각 나타나 시간이 경과할수록 감소하는 경향을 보였다. 혈소판의 현미경 관찰 결과 가수분해물 첨가 후 혈소판 수가 증가하였으나, 첨가 후 30초가 경과한 시점부터 혈소판 수가 감소하기 시작하여 120초 후에는 관찰 할 수 없었다. 본 실험 결과 bovine 및 caprine GMP의 trypsin 가수분해물에서 혈소판 응집을 억제할 수 있는 small peptide가 있는 것으로 생각되며, 향후 이러한 연구는 심근경색증 및 뇌혈전증을 예방할 수 있는 생리활성 물질로 이용될 수 있을 것이라 생각된다.
Abstract
This study was carried out to isolate and characterize the glycomacropeptide (GMP) prepared from cow's milk and Korean native goat's milk and to examine the effects of their tryptic hydrolysates on inhibition of platelet aggregation in an in vitro experiment. The GMP derived from Holstein, Korean native goat and Hanwoo migrated at 20 KDa. Sialic acid contents in skim milk of Holstein, Korean native goat and Hanwoo were 36.86±2.36, 37.98±1.27 and 31.19±1.87 ㎍/mg, respectively. Tyrosine was detected in both bovine and caprine GMP. The in vitro inhibition rate of platelet aggregation by tryptic hydrolysates of Holstein, Korean native goat and Hanwoo GMP were 4.02, 5.51 and 12.77%, respectively at reaction time 30 seconds. The inhibition of platelet aggregation by tryptic hydrolysates of bovine and caprine GMP are increased with increasing reaction time. The platelets staining revealed higher counts of platelets after the addition of GMP hydrolysates; however addition of ADP reduced the platelet count within 30 seconds and the platelets were not detected after 120 seconds. The results of this study indicate that tryptic hydrolysates of bovine and caprine GMP contain some small peptides with platelet aggregation properties. Further research on these lines may help prevent platelet aggregation related abnomalities in human.
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