2012, Vol.25, No.2

Anatomy & Biological Anthropology 2023 KCI Impact Factor : 0.33

pISSN : 2671-5651 / eISSN : 2671-566X
https://journal.kci.go.kr/aba

Hypoxia is one of the major causes of neonatal mortality. Hypoxia-induced tissue injuries are resulted from complex mechanisms such as DNA damage and apoptosis. In this study, we aimed to elucidate the changes in the expression of DNA repairing enzymes such as 8-hydroxyguanine glycosylase 1 (OGG1) and apurinic/apyrimidinic endonuclease 1 (APE1) and brain derived neurotrophic factor (BDNF) in the fetal cerebral tissue after intrauterine hypoxic injury. For this study, pregnant Sprague-Dawley rats were exposed to hypoxic gas (10% O2, 5% CO2, 85% N2) for 2 or 4 hours at postconception day 14.5 and 15.5. After 24 hours, the animals were anesthetized with ethyl ether and fetuses were obtained by laparatomy. Hematoxylin-eosin stain, immunohistochemical stain, and western blot were employed for analysis. The caspase-3 immunolabeled cells were significantly increased within the cerebral cortex after hypoxic injury. The expressions of OGG1, APE1, and BDNF were also increased in the cerebral tissue after hypoxic injury at postconception day 14.5, in a dose-dependent manner. However, the expression of BDNF was significantly decreased in the cortical tissue exposed to hypoxic injury at postconception day 15.5. These results demonstrate that fetal hypoxic injury induces apoptosis of the nerve cells and promotes the expressions of the DNA repairing enzymes and neurotrophic factors. In addition, these results suggest that protection mechanisms against hypoxic injury alter along the progression of the fetal development.

The effects of observation program of cadaver dissection for paramedical students were surveyed and obtained the following results. After observation of cadaver dissection, the students who will participate next time with their own will, who think this program is essential for anatomy study, who understand the orientation contents, and who think their anatomical knowledge elevated were increased. However, the number staffs of medical school who think this program is essential for paramedical students were about 1/3. The problems obtained in the observation program of cadaver dissection were discordance with teaching schedule, long orientation and observation time, and the 1/2 or above staffs leading this program were teaching assistants and medical students. Through this observation program of cadaver dissection, the paramedical students were aware of the meaning of cadaver donation and the noble will of donors certainly, and gained an opportunity feel the dignity of life.

In order to maintain the donation of the human bodies required for medical education and research,we investigated social characteristics of those who have signed up to the donation program. The data registered in Chungbuk National University were analyzed and then compared to those registered in 9 of other universities in Korea. In addition, a telephone survey was performed for 128 registrants of Chungbuk National University. The number of registrants was rapidly increased after 1999 and the donation of body was sufficient for medical education and research after 2005. The number of registrants of Chungbuk after 2005 shows gradual increase whereas 10 other schools shows slight decrease. The age of registrants at signing up to the program showed the largest proportion in seventies (33.9%), followed by sixties (28.9%) and fifties (22%). Multiple registration which means two or more registrants from one family represented 40.9%. After the use of cadaver and cremation, most of the bereaved family preferred to keep and visit the cremains in the charnel house of medical school more than to carry out the school. By the telephone survey, 71% of the registrants answered they are in middle or upper middle class of living, and 77% responded that the motivation was voluntary for the society without any reward. Based on the present results we could expect the body donations will reasonably maintaine. Most of dornors have pure motivation without any reward from the school. Keeping their cremains at charnel house of the medical school were strongly favored so it is important to make enough facilities and management system as well.