In a previous study, we observed a bimodal distribution of sensitivity to sister chromatid exchange (SCE) induction by diepoxybutane (DEB) in lymphocytes from healthy individuals. Twenty-four % of the participants had increased sensitivity to in vitro induction of SCEs and chromosomal aberrations. These same participants also had significantly higher frequencies of uninduced or baseline SCE fre...

Subcutaneous emphysema (SCE) is a possible complication of both nonsurgical and surgical endodontic treatment. A review of the literature pertinent to endodontic intervention and SCE is highlighted, while the causes of and recommendations for the prevention of SCE are provided. A review of the pathways whereby compressed air may travel through potential spaces in the head and neck is also illus...

The role of side-chain entropy (SCE) in protein folding has long been speculated about but is still not fully understood. Utilizing a newly developed Monte Carlo method, we conducted a systematic investigation of how the SCE relates to the size of the protein and how it differs among a protein's X-ray, NMR, and decoy structures. We estimated the SCE for a set of 675 nonhomologous proteins, and ...

OBJECTIVE This study investigated whether any genomic change occurs in DNA level in ankylosing spondylitis (AS) by measuring sister chromatid exchange (SCE) frequency. METHODS SCE frequency was detected on metaphase chromosomes obtained from peripheral blood lymphocyte cultures in 15 patients diagnosed as having AS. SCE values were also obtained from 15 healthy subjects as a control group. SC...

PURPOSE To study the association between the intraocular pressure (IOP)-induced anterior-posterior lamina cribrosa deformation (LCD) and scleral canal expansion (SCE). METHODS 3D eye-specific models of the lamina and sclera of the eyes of three normal monkeys were constructed. Morphing techniques were used to produce 768 models with controlled variations in geometry and materials. Finite elem...

The present study describes the establishment of both B- and T-cell lines from the peripheral blood cells of two Bloom's syndrome (BS) patients and one healthy female by using Epstein-Barr (EBV) and adult T-cell leukemia viruses (ATLV). The cell lines from normal and BS subjects exhibited cell surface markers compatible with B- and T-cell origin; in addition, the BS B- and T-cell lines retained...

The interaction of immune complexes with the human Fc receptor, FcgammaRIIa, initiates the release of inflammatory mediators and is implicated in the pathogenesis of human autoimmune diseases, including rheumatoid arthritis and systemic lupus erythematosus, so this FcR is a potential target for therapy. We have used the three-dimensional structure of an FcgammaRIIa dimer to design small molecul...

Recently, Combined Heat and Power (CHP) systems have been utilized increasingly in power systems. With the addition penetration of CHP-based co-generation of electricity and heat, the determination of economic dispatch of power and heat becomes a more complex and challenging issue. The optimal operation of CHP-based systems is inherently a nonlinear and non-convex optimization problem with a lo...

Sister chromatids are preferred substrates for recombinational repair after cells are exposed to DNA damage. While some agents directly cause double-strand breaks (DSBs), others form DNA base adducts which stall or impede the DNA replication fork. We asked which types of DNA damage can stimulate SCE in budding yeast mutants defective in template switch mechanisms and whether PCNA polyubiquitina...

The sister chromatid exchange (SCE) frequencies of six freshly established and two old cell lines derived from patients with lymphatic tumors or leukemia were compared to the SCE rates of lymphoblastoid cell lines of normal controls. All cell lines from malignant tumors displayed significantly higher SCE values than the control lines. In general, the SCE rates seem to be correlated to the numbe...