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Biomedical subjects

M Hashimoto

Publications and source records attributed to M Hashimoto.

At least 1,099 records · Page 61Linked to original sources
PubMed1983

[3H]thymidine autoradiographic and alkaline phosphatase histochemical studies of intestinal metaplasia of the human stomach.

The relationship between cell proliferation and enzyme activity in intestinal metaplasia of the human stomach was studied using a combined method of [3H]thymidine autoradiography and alkaline phosphatase histochemistry on the same section. Three types of intestinal metaplasia were observed depending on variations in both enzymatic activity and isotope labelling. One type shows alkaline phosphatase-positive cells along the entire length of the glands with [3H]thymidine-labelled cells localized only at the bottom of the glands, resembling the duodenum. In another type of intestinal metaplasia, alkaline phosphatase-positive cells are present on the surface and/or upper half of the glands with mitotically active cells occupying the lower part of the glands. The third variety of intestinal metaplasia is characterized by the absence of alkaline-phosphatase activity and [3H]thymidine-labelled cells present in an extended zone in the lower half of the glands. Differences in labelling patterns of [3H]thymidine and the activity of marker enzyme in various types of intestinal metaplasia seem to reflect variations in cell differentiation during intestinalization of gastric mucosa.

Alkaline Phosphatase↗
PubMed1983

Absorption, distribution and excretion of 3-(sulfamoyl[14C]methyl)-1,2-benziosoxazole (AD-810) in Rats, Dogs and Monkeys and of AD-810 in Men.

Disposition of 3 - (sulfamoyl[14C]methyl) - 1,2-benzisoxazole ( [14C]AD-810) in rats, dogs and monkeys after oral administration in 20 mg/kg was studied. In preliminary human studies, healthy subjects ingested 200 mg of AD-810. [14C]AD-810 was found to be completely absorbed from digestive tracts in animals, since urinary and biliary excretion accounted for virtually total recovery of dosed radioactivity. Plasma levels reached maxima at several hours after administration in all species examined and decreased exponentially. In rats, tissue levels were virtually similar to plasma levels indicating rather even distribution in the body, and tissue radioactivity disappeared with the similar rate to plasma. Autoradiographic findings on the distribution were consistent with radiometric results. Radioactivity was evenly distributed in fetus in the pregnant rat with the similar level to maternal tissue levels. Like other sulfonamide derivatives, AD-810 was markedly taken up by erythrocytes in all species. [14C]AD-810 radioactivity was mostly excreted within 48 to 72 h after administration and its major route was urine in animals. In men, excretion of unchanged AD-810 and its metabolite in urine was found to be rather slow. No significant differences were found in absorption, distribution and excretion of radioactivity after 7 consecutive daily oral dosings of [14C]AD-810 in rats.

Animals↗
PubMed1983

[Clinical evaluation of ototoxicity associated with intravenous drip infusion of amikacin].

On the 53 patients with ENT (ears, nose, and throat) diseases, ototoxicity after intravenous drip infusion of amikacin (Biklin AMK) was studied. Each dose of AMK was 400 mg/day in adults and 4--8 mg/kg/day in children. From audiometric analysis, there were no patients with any hearing disturbances and subjective complaints concerning labyrinth injury. Also abnormal laboratory findings were not found in them. An intravenous drip infusion of AMK in adequate dosage would be beneficial to use against some infectious diseases of otorhinolaryngologic field.

Adolescent↗
PubMed1983

[Two-dimensional echo-cardiographic study on left atrial thrombi in patients with a mitral prosthetic valve].

Two-dimensional echocardiographic study was performed to detect left atrial thrombi in 33 patients with a prosthetic mitral valve. The subjects were 9 males and 24 females and their ages ranged from 21 to 61 years (average 43.2 years). Their prosthetic valves consisted of 18 Hancock, three Carpentier-Edwards, four Björk-Shiley, four Starr-Edwards and four St. Jude Medical valves. Two-dimensional echocardiograms were obtained using a Toshiba SSH-11A echograph with an electronic phased-array scanner. The left parasternal, apical, subcostal and right parasternal windows were used to detect left atrial thrombi. In five of the 33 patients, a left atrial thrombus was demonstrated as a mass echo attached to the posterior wall of the left atrium. The clinical and echographic features of five patients with a left atrial thrombus (Group A) were compared to those of 28 patients without it (Group B). The average age at the time of operation was 44.6 +/- 9.7 years in Group A and 43.0 +/- 9.5 years in Group B, showing no difference between the two groups. In 10 of the 33 patients, a left atrial thrombus was confirmed by the initial operation. In only one of these 10 patients, a left atrial thrombus was demonstrated by post-operative two-dimensional echocardiographic examination. The presence or absence of a left atrial thrombus in the pre-operative stage did not clearly relate to the occurrence of a left atrial thrombus in the post-operative stage. The cardio-thoracic ratio was significantly greater (p less than 0.01) in Group A (74.4 +/- 6.3%) than in Group B (58.1 +/- 8.1%). Left atrial dimension by M-mode echocardiograms was significantly greater (p less than 0.05) in Group A (70.6 +/- 11.3 mm) than in Group B (51.6 +/- 7.7 mm). The length of the pseudo-septalized left ventricular posterior wall was longer (p less than 0.05) in Group A (34.0 +/- 11.5 mm) than in Group B (12.8 +/- 9.4 mm). The angle between the perpendicular to the mitral annulus and the upper part of the interventricular septum was significantly greater (p less than 0.01) in Group A (58.6 +/- 18.0 degrees) than in Group B (18.8 +/- 9.6 degrees). The characteristics observed in Group A were thought to be caused mainly by the giant left atrium. Therefore it is concluded that there is a close relationship between left atrial thrombi and the giant left atrium in patients with a mitral prosthetic valve.

Adult↗
PubMed1983

[Clinical study of urothelial tumors of the upper urinary tract. 1: Primary renal pelvic tumors].

Forty primary renal pelvic tumors treated at our University between 1963 and 1981, were reviewed retrospectively. The conclusions of this study are as follows. Sex and age distribution of the patients were 30 males and 10 females (3: 1), and average age was 60.5 years old. The major symptoms were hematuria and flank pain; however, palpable mass was rare. The majority of patients were admitted to our clinic within 6 months from manifestation of symptoms. The major findings of IVP were non-functioning kidney and filling defect. The positive rate of urinary cytology was 46.7%. Total nephroureterectomy with bladder cuff was performed in 20 out of 32 cases. Histologically, 29 cases were transitional cell carcinoma and 4 cases were squamous cell carcinoma with renal calculi. Simultaneous urothelial tumors were seen in 10 cases, 3 in the ureter and 7 in the bladder. A subsequent ureteral tumor was found in one out of 12 cases in which ureters were resected incompletely, and 7 subsequent bladder tumors were found out of 32 cases receiving surgical treatment in the follow-up period. The 5-year survival rate by the actuarial method was 75.9%. Among several factors, grade and stage of the tumor were the most influencing factors for prognosis. An effective method of post-operative treatment could not be established.

Adult↗