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Animal Bioresource in Japan

.: Home > Animal Bioresource in Japan > 2015 > Volume 64 Number 3 > Kei Matsuno and Setsunosuke Ihara

Ultrastructural analysis between fetal and adult wound healing process of marsupial opossum skin

Kei Matsuno and Setsunosuke Ihara
Graduate School of Agriculture, Tottori University, Nishikawatsu 1060, Matsue, Shimane 690-8504, Japan
Abstract :

The opossum delivers a newborn baby equivalent to tremature fetus state by postpregnancy. The peculiarity is advantageous for studies of fetus, because operations to take out fetus from the uterus of a mother are not necessary. When mammalian skin is wounded by full-thickness excision, fetal and adult wound healing processes differ. Fetal-type wound healing does not leave a scar. However, studies of how the fetal wound healing process differs in detail from the adult type are not advanced. We first observed the normal skin development of the gray short-tailed opossum (Monodelphis domestica) using an electron microscope. As for normal skin, an epidermis became multi-layered, and thickened from birth through to 7 days after birth. The quantity of extracellular matrix of the dermis increased thereafter, and several types of cells were found in the dermis. To examine the wound healing, we used material from a 1 day-old newborn baby, and from another 15 days after birth, and compared the wound healing style morphologically. Differences in the constitution of cells and fine structures of the skin were observed, it was obviously suggested that change in the wound healing style from fetal-type to adult-type occurred between 1 to 15 days after birth.

Keywords :
Electron microscopy, opossum, skin

Date Deposited : 07 Jan 2016 10:52

Last Modified : 07 Jan 2016 10:52

Official URL: http://

Volume 64, Number 3, April 2015 , ISSN 323–332

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