2008, Vol.21, No.4

Anatomy & Biological Anthropology 2023 KCI Impact Factor : 0.33

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

VEGF and its receptors, flk-1 and flt-1 have been characterized as critical factors in angiogenesis and neurogenesis during development. Here we investigated the expression of VEGF and its receptors in postnatal murine cerebellum in terms of time-dependency and regional distribution. Immunofluorescence staining showed that the expression of VEGF was restricted only to Purkinje cells and was increased in their processes on the postnatal development. Flk-1 was expressed in Purkinje cellular bodies on postnatal day (P) 8, 11, 18. Flt-1 was expressed in Purkinje cells on P8 but gradually disappeared in all of cerebellar layers on the postnatal development. These results suggest that VEGF may contribute to postnatal development of cerebellum via its receptors. And they suggest that changes in the expression of VEGF and its receptors related to the difference in maturation and proliferation of Purkinje cells in the cerebellum.

The ABCC11 gene is a member of the ATP-binding cassette gene family. A single nucleotide polymorphism (SNP) in the ABCC11 gene is associated with the determination of human earwax type. The purpose of this research is to evaluate the allelic frequencies of this gene in Korean population samples. A total of 619 individuals were analyzed by Dde I restriction fragment length polymorphisms (RFLPs). The genotype frequency of dry earwax in Koreans was very high. The proportions of dry/dry genotype found were 99% (99/100) in normal controls; 98.1% (207/211) in patients with schizophrenia; 99% (99/100) in patients with breast cancer; 96% (48/50) patients with uterine myoma; 98.3% (59/60) in obesity subjects; 100% (43/43) in patients with stomach cancer, and 98.2% (54/55) in attention deficit hyperactivity disorder (ADHD) patients. The wet/wet genotype was not found. There were no significant differences in the distribution of earwax genotypes between controls and experimental groups. These results suggest that the frequency of dry earwax are very high, and therefore the SNP determining earwax type will not be useful in genetic studies of the process involved in various diseases or pathologic conditions in Korean populations.

Epithelial differentiation and morphogenesis in skin and oral mucosa were elucidated using various experimental tools. However, tongue epithelial differentiation has not been examined properly yet. In this study, we identified the relationship between morphological changes and localizations of differentiation markers, such as cytokeratins and PAX 9 in mice embryonic tongue development. Protective barrier formation and localization pattern of cytokeratins in tongue epithelium were examined with toluidine blue staining and immunohistochemistry respectively. Localization patterns of PAX 9 and Cytokeratin 14 were coincided during tongue epithelium development. In addition, compared with Ki67 localizations, marker for cell proliferation, localization patterns of PAX 9 and Cytokeratin 14 would suggest that these factors would involve in tongue barrier formation through cell proliferation. Based on these results, tongue epithelial differentiation woule begin at E14 with the specific localizations of PAX 9 and Cytokeratin 14 prior to protective barrier formation then Cytokeratin 1, keratinization marker, would involve in protective barrier and filiform papillae formations.