Cytokeratin expression in human fetal tongue and buccal mucosa.

Expression of cytokeratins (CK), a subset of intermediate filament (IF) proteins in epithelia, is developmentally regulated. CK expression may also change after malignant transformation. Our earlier studies on CK expression in human oral tumours and pre-cancerous lesions have shown specific changes in CK expression. We analysed CK expression in human tongue and buccal mucosa (BM) in fetuses in the embryonic age group of 16 to 27 weeks using biochemical and immunohistochemical techniques to find out whether there is any similarity in CK expression in human oral squamous cell carcinomas (SCC) and fetal oral tissues. CK 1, 8 and 18 were detected in a majority of samples using both techniques. Our earlier studies had shown aberrant expression of CK 1 and 18 in many of the oral SCC and leukoplakias. Studies by immunohistochemistry showed that these different CK antigens were expressed in different cell layers. CK 1(2) were present in the stratified epithelial layers whereas CK 8 and 18 were restricted to glandular epithelium. Till 27 weeks of gestation, both tongue and BM expressed CK 1, 8 and 18 along with CK 6 and 16. Thus, fetal tissues showed some similarities in CK pattern with their respective SCC.

Post-puerperal Cu-T insertion: a prospective study.

One hundred and sixty eight consecutive women accepting copper T (CuT) intrauterine contraceptive device in the post-puerperal period were studied. Out of them, 63 could be followed after 6 weeks of insertion and 65 after 6 months of insertion. The risk of heavy bleeding, pain in abdomen etc. were no greater than those usually found when interval CuT insertion is carried out. There was no case of uterine perforation leading to migration of CuT. But the expulsion rate was found to be high i.e. 16.4%. CuT is a very useful post-puerperal contraceptive method and should be given more importance in MCH programme.