We identified a patient with novel heterozygous variant fibrinogen, γp.C352R (Niigata II; N-II), who had bleeding episode and failed infertility treatment was suspected to have hypodysfibrinogenemia based on low discordant fibrinogen levels (functional assay 0.33 g/L, immunological 0.91 g/L). analyzed the mechanism of this rare phenotype congenital disorder. Patient plasma purified protein char...

A new multiple drug-resistant Chinese hamster ovary cell line, CHO-SMR5, has been isolated which demonstrates a direct correlation between reduced cellular topoisomerase II activity (5-fold reduction) and a low level of resistance (3- to 7-fold) to topoisomerase II inhibitors. This cell line, initially selected for resistance to 9-(4,6-O-ethylidene-beta-D-glucopyranosyl)-4'-demethylepipodophyll...

The three malignant melanoma cell lines used are characterized by having high, intermediate, and low quantities of pigment production. The response of these malignant melanoma cells to X-ray in vitro does not correlate with a model of the classically radioresistant tumor cell that clinical experience might predict. The in vitro melanoma cells were only slightly more resistant to X-rays than the...

Agents that inhibit DNA synthesis increase the frequency of methotrexate resistance and gene amplification in cultured mammalian cells. Chinese hamster ovary cells blocked with hydroxyurea rereplicated dihydrofolate reductase gene sequences within a single cell cycle upon release from the block (Mariani, B.D., and Schimke, R.T. (1984) J. Biol. Chem. 259, 1901-1910). Perturbation of DNA synthesi...

MicroRNAs (miRNAs) are small non-coding RNAs (∼22 nucleotides) which regulate gene expression by silencing mRNA translation. MiRNAs are transcribed as long primary transcripts, which are enzymatically processed by Drosha/Dgcr8, in the nucleus, and by Dicer in the cytoplasm, into mature miRNAs. The importance of miRNAs for coordinated gene expression is commonly accepted. Consequentially, there ...

A 2-year-old multiparous (Case 1) and a 2.5-year-old nulliparous 2) Djungarian hamster each presented with history of prolapsed mass from the vulva. partial uterine prolapse was diagnosed in both cases, according to clinical diagnostic examinations. The replaced hamster, an ovariohysterectomy performed. histopathological examination removed tissues revealed cyst papillary hyperplasia ovary. Thi...

We have previously presented evidence that a transient block to DNA replication induces an aberrant form of DNA synthesis. The most feasible explanation for this data is that the block to DNA replication results in some segments of the chromosomal DNA being replicated more than once in a single cell cycle. This form of aberrant DNA synthesis was demonstrated to occur following direct inhibition...