계명찬 교수

The safety of human exposure to an ever-increasing number and diversity of electromagnetic field (EMF) sources both at work and at home has become a public health issue. To date, many in vivo and in vitro studies have revealed that EMF exposure can alter cellular homeostasis, endocrine function, reproductive function, and fetal development in animal systems. Reproductive parameters reported to be altered by EMF exposure include male germ cell death, the estrous cycle, reproductive endocrine horm

Marijuana smoke and cannabinoids adversely affect male reproductive function in human and rodent through the cannabinoid receptors. To understand the possible function of cannabinoid receptor 1 (CB1) in spermatogenesis, expression of CB1 in testis during the postnatal development was examined in mice. Semiquantitative RT-PCR analysis revealed that testicular CB1 mRNA level was relatively high at 1 week post partum (p.p.). Following decrease during prepubertal development (2 weeks p.p.) and CB1 m

Acetyl tributyl citrate (ATBC) is an (the Food and Drug Administration) FDA-approved substance for use as a pharmaceutical excipient. It is used in pharmaceutical coating of solid oral dosage forms such as coated tablets or capsules. However, the information of ATBC on its pharmacokinetics is limited. The aim of this study is to investigate the pharmacokinetic properties of ATBC using liquid chromatography⁻tandem mass spectrometric (LC⁻MS/MS) analysis. ATBC was rapidly absorbed and eliminated an

In the testis, tight junctions (TJs) between adjacent Sertoli cells are important for the formation of blood-testis barrier (BTB). To verify the role of paracrine interactions between the Sertoli and Leydig cells in the structure and function of BTB in testis, the expression of claudin-1 and -11, and transepithelial electrical resistance (TER) of the mouse Sertoli cells were examined under the Leydig cell coculture. TER of Sertoli cell monolayer was significantly larger under the Leydig cell coc

Tight junctions (TJ) are critical for blastocoel formation in mammalian embryos. The present study aimed to examine the role of tight junctions in the differentiation of the trophectoderm (TE), and in the pluripotency of blastomeres, as well as in the formation and integrity of the blastocoel. We examined the effect of occludin antibody on blastocoel formation, blastocyst permeability, and expression of H19 and Oct-4, markers of TE differentiation and blastomere pluripotency, respectively. Eight

In testis, tight junctions (TJs) between adjacent Sertoli cells are important for the formation of the blood-testis barrier (BTB) and crucial for spermatogenesis. The present study aimed to find postnatal changes in the expression of claudin-1, one of the TJ genes in mouse testis. By semiquantitative RT-PCR, it was found that claudin-1 expression in testis increased up to a peak at 10 days after birth and decreased thereafter. Western blot analysis showed abundant expression of 21-kDa protein in