Conversion of ES cells to columnar epithelia by hensin and to squamous epithelia by laminin

Single-layered epithelia are the first differentiated cell types to develop in the embryo, with columnar and squamous types appearing immediately after blastocyst implantation. Here, we show that mouse embryonic stem cells seeded on hensin or laminin, but not fibronectin or collagen type IV, formed hemispheric epithelial structures whose outermost layer terminally differentiated to an epithelium that resembled the visceral endoderm. Hensin induced columnar epithelia, whereas laminin formed squamous epithelia. At the egg cylinder stage, the distal visceral endoderm is columnar, and these cells begin to migrate anteriorly to create the anterior visceral endoderm, which assumes a squamous shape. Hensin expression coincided with the dynamic appearance and disappearance of columnar cells at the egg cylinder stage of the embryo. These expression patterns, and the fact that hensin null embryos (and those already reported for laminin) die at the onset of egg cylinder formation, support the view that hensin and laminin are required for terminal differentiation of columnar and squamous epithelial phenotypes during early embryogenesis

Age of women as a parameter Affecting CA-125, TSH and CBC

One of the Cancer’s antigens is the CA125, which is a protein antigen, found at excessively high levels in females characterized with ovarian cancer. It is suggested for ovarian cancer screening of women that are at higher risk to get the disease, despite its limited sensitivity and specificity. This study is conducted to identify possible correlations between CA125 and TSH levels with parameters of hematological origin among women of different ages. This study included 44 healthy looking females. Most but not all patients were from Erbil. The study revealed that, CA125 and TSH levels were not associated. Also, the elevation of the CA125 levels in the females could be related to other non-cancerous factors such as menstrual cycle, or postmenopausal. Also WBC parameters and Hb levels were not affected by CA125. The only parameter that was affected by CA125 elevation was RBCs. The research recorded a significant difference of RBC between patient group and control group. Also recorded, no difference to be considered as an indication related to the difference in women age