사람 외안근에서의 Myosin Heavy Chain 아형의 분포

• 영문명: Distribution of Myosin Heavy Chain Isoform in Human Extraocular Muscles
• 발행기관: 대한안과학회
• 저자명: 박경아 오세열,Kyung-Ah Park, MD, Sei Yeul Oh, MD
• 간행물 정보: 『대한안과학회지』Ophthalmological Society,volume50,number2, 285~289쪽, 전체 5쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 2009.02.15

영문 초록

Purpose: To provide quantitative data on the distribution of MyHCeom and compare the proportion of myosin heavy chain (MyHC) isoforms between the central and peripheral regions of human extraocular muscles (EOMs). Methods: Medial rectus, lateral rectus, superior rectus, inferior rectus, superior oblique, and inferior oblique muscle samples were taken from three men with brain death. To examine the longitudinal distribution of myosin isoforms, the muscles were divided into central and peripheral portions of equal length. Electrophoresis and densitometry were used to quantify the distribution of MyHC isoforms. Results: Electrophoresis of whole‐muscle extracts of sampled EOMs revealed four MyHC bands that were identified as MyHCI, MyHCeom, MyHCIIa, and MyHCIIx. The proportion of MyHCeom was higher in the central region, whereas the proportion of MyHCIIa was higher in the peripheral region. The relative proportions of MyHCI, MyHCeom, and MyHCIIa were not significantly different among the EOMs. There was a tendency for higher levels of MyHCIIx in the inferior rectus muscle. Conclusions: The proportion of MyHCeom was higher in the central region of human EOMs. Further studies are needed to investigate the consequences of this distributional difference on the function of EOMs.

키워드

Electrophoresis, Human extraocualr muscle, Myosin heavy chain isoform