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쥐 방광부분 폐색 및 척수손상 후 방광평활근의 마이오신 동형의 변화: 예보

Changes in the Expression of Smooth Muscle Myosin Heavy Chain mRNA following Partial Bladder Obstruction or Spinal Cord Injury in Rat: A Preliminary Study

대한비뇨기과학회지 2007년 48권 5호 p.522 ~ 526
변영민 ( Byun Young-Min ) - 단국대학교 의과대학 비뇨기과학교실

이길호 ( Lee Gil-Ho ) - 단국대학교 의과대학 비뇨기과학교실

Abstract


Purpose: The smooth muscle myosin heavy chain(SMMHC) isoform composition has been actively researched in a partial bladder obstruction (PBO) or spinal cord injury(SCI) model. Even though rat is an ideal animal for studying bladder physiology, there were very few reports about the changes of the SMMHC isoforms in the PBO or SCI injured bladder of rat. We developed two polymerrase chain reaction(PCR) primer sets to amplify the isoforms and we applied the primers to the PBO and SCI rat models.

Materials and Methods: Female rats had their bladder necks surgically obstructed or they were subjected to spinal cord injury. Six weeks after the event, the bladders were excised. The expression of the C-terminal (SM1 and SM2) and N-terminal(SM-A and SM-B) isoforms of SMMHC was analyzed by performing reverse transcriptase-PCR(RT-PCR).

Results: The control bladder showed only the SM-B isoform in the C-terminal. However, the bladder after SCI showed an increased SM-A to SM-B ratio. In case of PBO, the ratios were variable. A decreased SM1 expression was noted in the PBO and SCI groups when compared to the control group(p<0.05).

Conclusions: Our female rat models for PBO or SCI demonstrates changes in the expression of smooth muscle myosin heavy chain isoforms. We will apply this primer set for studying of rat muscular physiology in PBO or SCI model. (Korean J Urol 2007;48:522-526)

키워드

Rats;Myosin heavy chains;Urinary bladder neck obstruction;Spinal cord injuries
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