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“Electrophysiological Effects of Mesenchymal Stem Cell Transplantation Introduction Transplantation of mesenchymal stem cells (MSCs) has shown therapeutic potential for cardiovascular diseases, but
the electrophysiological implications are not understood. The purpose of this study was to evaluate the impact of MSC transplantation on adverse electrophysiological remodeling in the heart following myocardial infarction (MI).\n\nMethods and Results Three weeks after coronary ligation to induce MI in rats, MSCs or culture medium were directly injected into each infarct. One to two weeks later, hearts BMS-777607 purchase were excised, Langendorff-perfused, and optically mapped using the potentiometric fluorescent dye Di-4-ANEPPS. Quantitative real-time PCR was also performed to assess gene expression. Optical mapping showed that post-MI reduction in conduction velocity (from 0.70 +/- 0.04m/s in 12 normal controls to 0.47 +/- 0.02m/s in 11 infarcted hearts, P<0.05) was attenuated with MSC transplantation (0.65 +/- 0.04m/s,
n = 18, P<0.05). Electrophysiological changes correlated with higher vascular density and better-preserved ventricular geometry in MSC-transplanted hearts. A number of ion channel genes showed changes in RNA expression following infarction. In particular, the expression of Kir2.1, which mediates the inward rectifier potassium current, I-K1, was reduced in infarcted tissues (n = 7) to 13.8 +/- 3.7% of normal controls, and Nepicastat clinical trial this post-MI reduction was attenuated with MSC transplantation (44.4 +/- 11.2%, n = 7, P<0.05).\n\nConclusion In addition to promoting angiogenesis and limiting adverse structural remodeling in infarcted hearts, MSC transplantation also alters ion channel expression and mitigates electrophysiological remodeling. Further understanding of the electrophysiological impact of MSC transplantation to the heart may lead to the development of cell-based therapies for post-MI arrhythmias.”
strabismus is commonly caused by superior oblique muscle palsy, often resulting from blunt head trauma or vascular problems, and less often from brain Selleckchem CA4P tumors, meningitis, and aneurysms. To date, mucoceles in the ethmoid sinus have rarely been reported as a cause for superior oblique muscle palsy. We report a case of trochlear nerve palsy and subsequent optic neuropathy caused by a mucocele in the ethmoid and sphenoid sinuses.”
“Single crystals of synthetic CaMgSi(2)O(6) (diopside) doped with different amounts of Fe and Na were produced under water- and silica-saturated conditions at 20 kbar using a piston-cylinder apparatus. All samples were investigated by FTIR spectroscopy and electron microprobe, and some crystals were characterised by Mossbauer spectroscopy. IR spectra recorded on pure diopside show one OH absorption band at 3360 cm(-1). In Na-doped diopside an additional band centred at 3428 cm(-1) is observed.