Two Drosophila myosin II point mutations (D45 and Mhc(5)) generate Drosophila cardiac phenotypes that are similar to dilated or restrictive human cardiomyopathies. Our homology models suggest that the mutations (A261T in D45, G200D in Mhc(5)) could stabilize (D45) or destabilize (Mhc(5)) loop 1 of myosin, a region known to influence ADP release. To gain insight into the molecular mechanism that...

The interaction of myosin subfragment 1 (S1) with actin-tropomyosin-troponin (regulated actin) is highly nucleotide dependent. The binding of S1 or S1-ADP (but not S1-ATP nor N,N'-rho-phenylenedimaleimide-modified S1-ATP) to regulated actin activates ATP hydrolysis even in the absence of Ca(2+). Investigations with S1 and S1-ADP have led to the idea that some actin sites are directly blocked to...

The present study investigated whether the long-interval interhemispheric inhibition (LIHI) is induced by the transcranial magnetic stimulation over the primary sensory area (S1-TMS) without activation of the conditioning side of the primary motor area (M1) contributing to the contralateral motor evoked potential (MEP), whether the S1-TMS-induced LIHI is dependent on the status of the S1 modula...

etoposide, a widely used anticancer drug, exhibits low and variable oral bioavailability mainly because of being substrate for the efflux transporter, p-glycoprotein (p-gp). therefore, the present study was aimed to investigate the effect of d-α-tocopherol polyethylene glycol 1000 succinate (tpgs) and peg 400 as p-gp inhibitors on the intestinal absorption of etoposide. everted sacs of rat smal...

background: spontaneous abortion is considered as the most complex problem during pregnancy. thrombophilia is resumed as a cause of recurrent pregnancy loss (rpl). glycoprotein iiia (gpiiia) gene is involved in thrombosis and abortion. angiotensin converting enzyme (ace) converts angiotensin i to angiotensin ii and is involved in thrombosis. the most common polymorphism in this gene is the inse...