한국동물생명공학회지 (Journal of Animal Reproduction and Biotechnology)

  • 제34권3호
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  • Pages.190-196
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  • 2019
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  • 2671-4639(pISSN)
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  • 2671-4663(eISSN)
한국동물생명공학회 (The Korean Society of Animal Reproduction and Biotechnology)
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돼지 정소상체에서 ZO-1, Claudin 1 및 Claudin 4의 발현 양상

The Expression and Localization of ZO-1, Claudin 1, and Claudin 4 in the Pig Epididymis

  • Park, Yun-Jae (Department of Animal Resources Science, Kongju National University) ;
  • Kim, Bongki (Department of Animal Resources Science, Kongju National University)
  • 투고 : 2019.09.06
  • 심사 : 2019.09.23
  • 발행 : 2019.09.30
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초록

Tight junctions are constituents of the blood-epididymis barrier that play roles in regulating the unidirectional transcellular transport of ions, water, and solutes to maintain optimal conditions for sperm maturation and storage. Claudin 1 (Cldn1) and 4 (Cldn4) are known as tight junction proteins and are expressed in the basolateral membranes as well as tight junctions in the epididymis of rodents. Here, we examined the expression and localization of Cldn1 and 4 to determine the function of these proteins in the pig epididymis. Cldn1 was highly expressed in the basolateral membrane of epithelial cells in the caput and corpus regions of the epididymis. In the cauda region, however, Cldn1 labeling was significantly decreased in the basolateral membrane of epithelial cells. In contrast, labeling indicated that Cldn4 was expressed in the basolateral membrane in the cauda region of the epididymis and was present at punctate reactive sites in the caput and corpus regions. However, in no region of the epididymis did we detect colocalization of Cldn1 and 4 with labeled ZO-1, the distribution of which is restricted to the tight junctions. Our results indicate that Cldn1 and 4 were region-specifically expressed in the pig epididymis but not present in the tight junctions of epididymal epithelium. In addition, reciprocal regulation in specific regions of the epididymis between Cldn1 and 4 may play an important role in generating an optimal luminal environment for sperm maturation and storage in the pig epididymis.

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참고문헌

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