No abstract available.
Tendons*

No abstract available.

This experiment was aimed to investigate the contractile responses of the fermoral artery to the electrical stimulation and the inhibitory effects of verapamil and papaverine on the electrical stimulation of the fermoral artery in the control (n=46) and the diabetic rabbits(n=40). Diabetic rabbits were made by and administration of alloxan (100 mg/kg) intravenously and sacrified 8 weeks later. Femoral arterial rings 3 mm in length were taken and mounted on the force-displacement transducer for the measurements of isometric tension. All experiments were done in the aerated (95% O2 with 5% CO2)biological chamber filled with Kreb's solution and the initial tension of 1.5g was applied to the rings. After 1 hour of equilibrium of the rings, the contractile responses of the electrical stimulation on the femoral arterial rings were taken without vasoactive drugs and then, under verapamil and papaverine solution. And we compared the morphologic findings of the vessels in the two groups in relation to the functional changes by transmission electron miroscopy. The results are as follows: 1. The contractile responses in the presence of verapamil or papaverine solutions to the electrical stimulation were lowed significantly in the fermoral arterial rings of the diabetic rabbits compared with that of the control rabbits (verapamil; 10M~10M: p<0.01, papaverine; 10M & 10M: p<0.01). 2. Transmission electron microphotographs showed many morphological differences of the femoral arteries between the control and the diabetic rabbits. These were irregularities of the internal elastic lamina and the hypertrophy of the cytoplasms of the smooth muscle cells. And also, there were many vacuoles in the cytoplasm of the endothelial cells, lateral to the internal elastic laminaes, and between the smooth muscle cells in the diabetic rabbit femoral artery. By this study, we found that the contractile responses of the femoral arterial rings to the electrical stimulation were decreased in the diabetic rabbits, and the vasodiatory effects of verapamil and papaverine on the electrically stimulated femoral arterial rings were also lowered in the diabetic rabbits compared with the control rabbits. These changes of the vasular responses of the diabetic vessel may be associated with morphological changes manifested by transmission electron microscopy or any other functional derangement of the vessels.
Alloxan ; Arteries ; Cytoplasm ; Electric Stimulation* ; Endothelial Cells ; Femoral Artery ; Hypertrophy ; Microscopy, Electron, Transmission ; Myocytes, Smooth Muscle ; Papaverine ; Rabbits ; Transducers ; Vacuoles ; Vasodilator Agents* ; Verapamil

No abstract available.

No abstract available.
Brain Neoplasms* ; Brain*

Doxorubicin(Adriamycin(R)) is effective in the treatment of various solid tumors and hematologic malignancies. Because of dose-related cardiotoxicity, however, early inappropriate discontinuation of doxorubicin therapy may minimize its therapeutic efficacy in many patients. Consequently, clinically sensitive tests are needed to select patients in whom treatment must be stopped early. Various techniques have been used for early detection of subclinical doxorubicin-induced cardiotoxicity, including electrocardiography, systolic time intervals, echocardiography, radionuclide angiography and endomyocardial biopsies. Most studies of doxorubicin cardiotoxicity have dealt with systolic function of the left ventricle and effects on diastolic function have not been reported. In order to determine whether impaired diastolic function may be an early sign of doxorubicin cardiotoxicity, a retrospective study was performed in 12 patients who had undergone serial radioangiography and were found to have left ventricular ejection fractions(LVEF)> or =55% prior to doxorubicin treatment and during follow-up. Average rapid filling velocity(RFV) and slow filling velocity(SFV) were both significantly reduced after doxorubicin treatment. RFV fell from 5.17+/-1.52 units/second to 4.18+/-0.96(P<0.01) and SFV fell from 2.20+/-1.32 units/second to 1.42+/-0.62(P<0.05). There were no significant changes in filling volume ratio, total diastolic time and diastolic time ratio. Since a change in left ventricular diastolic function can occur before ejection fraction falls to subnormal levels, diastolic function as well as systolic function should be examined in the early detection of doxorubicin cardiotoxicity.
Biopsy ; Doxorubicin* ; Echocardiography ; Electrocardiography ; Follow-Up Studies ; Heart Ventricles ; Hematologic Neoplasms ; Humans ; Radionuclide Angiography ; Retrospective Studies ; Systole

No abstract available.
Salivary Glands*

No abstract available.
Brain Neoplasms* ; Brain* ; Tomography, Emission-Computed, Single-Photon*

No abstract available.
Conjunctiva* ; Melanoma*

No abstract available.
Animals ; Nerve Regeneration* ; Rats* ; Sciatic Nerve* ; Transplants*