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Biomedical subjects

N Amino

Publications and source records attributed to N Amino.

At least 325 records · Page 18Linked to original sources
PubMed1980

Increase of peripheral B lymphocytes in Graves' disease.

Peripheral T and B lymphocytes were examined in autoimmune thyroid diseases. The percentages of T and B lymphocytes were calculated from the proportions of E and EAC rosette-forming cells and peroxidase-positive cells determined by micromethods. In thyrotoxic Graves' disease, the percentage of T cells was significantly lower, and the percentage of B cells was higher than in normal controls. The absolute count of B lymphocytes was also markedly increased. The serum levels of thyroid hormones showed a significant correlation with the percentage of B cells and an inverse correlation with that of T cells in untreated cases of Graves' disease. Similar abnormalities of lymphocyte subpopulations were observed in patients with thyrotoxic Graves' disease under drug therapy, but the proportions and absolute counts of T and B lymphocytes were normal in euthyroid patients with Graves' disease, either under drug therapy or in remission. No abnormalities in T and B cells were found in Hashimoto's disease. The data indicate that the main feature of the abnormality of the lymphocyte subpopulations in thyrotoxic Graves' disease is an increase of B lymphocytes. The reasons for the discrepancy between our results and those of earlier reports and for the B cell abnormality in Graves' disease are discussed.

Adult↗
PubMed1980

A follicular adenoma arising from the thyroid tissue of a benign cystic teratoma during pregnancy--lightmicroscopical, ultrastructural and endocrinological studies.

A rare case of follicular adenoma arising from the thyroid tissue of a benign cystic teratoma of the left ovary was described in a 28-year-old, 13 weeks pregnant woman. Histologically, the tumor showed pleomorphic adenomatous patterns; embryonal type, fetal type, simple type and oxyphil type. The final diagnosis of follicular adenoma was established by ultrastructural, immunohistological and endocrinological studies. The patient was successfully operated, delivered of a normal full term male infant and is now under a follow-up study.

Adenoma↗
PubMed1979

The analysis of alkaline phosphatase isoenzyme using 4-methylumbelliferyl phosphate as substrate on a cellulose acetate membrane.

A new procedure is established for the analysis of alkaline phosphatase isoenzymes. The electrophoretic separation on cellulose acetate membrane coupled with the detection of alkaline phosphatase activity with 4-methyl-umbelliferyl phosphate as a substrate is described. The proposed method would be useful for the analysis of sample of micro-scale quantities and low activities.

Alkaline Phosphatase↗
PubMed1979

Seasonality of birth in sporadic cretinism.

The seasonal distribution of birth dates of 31 patients with sporadic cretinism due to thyroid dysgenesis was analyzed in Osaka area for 14 years. The incidence was statistically high in the summer months. A hypothesis that some environmental factors such as viral infection may cause the disease is proposed.

Birth Rate↗
PubMed1979

Longitudinal study or serum thyroid hormones, chorionic gonadotrophin and thyrotrophin during and after normal pregnancy.

Measurements of serum levels of thyroxine (T4), free T4, 3,5,3'-triiodothyronine (T3), free T3, 3,3',5'-triiodothyronine (reverse T3, rT3), thyroxine-binding globulin capacity (TBGcap), chorionic gonadotrophin (hCG) and thyrotrophin (TSH) were carried out prospectively in eight women with uncomplicated pregnancies, in order to examine interrelationships between the thyroid gland and thyroid stimulating hormones during pregnancy. During pregnancy the levels of T4, free T4, T3, rT3 and TBGcap were significantly elevated, and TSH was decreased. It was noted that the elevation of T4 was maintained from the 8th to the 27th week of gestation while the level of TBGcap progressively increased. The levels of free T4 and rT3 in the first and third trimesters were significantly higher than those of age-matched, non-pregnant women. The levels of hCG showed a biphasic variation, with a peak in the 8th to 15th weeks, followed by a decline in the second trimester and a small, secondary elevation in the 32nd to 39th weeks. This later elevation was positively correlated with changes in free T4 and free T3 levels. The increase of serum T4 accompanied by an increase of free T4 in the first trimester appeared due to augmented secretion of T4, rather than being secondary to the elevated levels of TBGcap.

Adolescent↗
PubMed1979

Transient infantile hyperthyrotropinaemia. Report of a case.

A case of transient hyperthyrotropinaemia was found by mass screening for neonatal hypothyroidism using the paired TSH assay method. The patient was a baby boy born at term after a normal pregnancy who grew without any abnormal signs or symptoms. For the first 7 months after birth, his serum TSH was abnormally high while his total serum T4, T3, and free T4, T3 were within normal limits, exept for slightly low free T4 level at 7 months. The raised serum TSH decreased spontaneously to within normal limits after he was 9 months old.

Humans↗
PubMed1979

Measurement of anti-thyroid antibodies in dried blood spots.

The method for determination of anti-thyroid antibodies in extracts of dried whole blood on filter paper was described. Antibodies in dried blood were stable at room temperature for at least 1 month and were extracted well by overnight elution. This simple method requires only a minimal 30 microliter of venous blood and would enable large-scale screening for autoimmune thyroid diseases.

Autoantibodies↗
PubMed1978

Differentiation of thyrotoxicosis induced by thyroid destruction from Graves' disease.

Thyroid function was tested in untreated patients with Graves' disease or thyrotoxic subacute thyroiditis, and in patients with autoimmune thyroiditis who showed postpartum or spontaneous transient thyrotoxicosis. The serum triiodothyronine/thyroxine ratio (T3/T4) was greater than 20 ng/microgram in Graves' disease but less than 20 in all patients with subacute thyroiditis and 9 of 11 patients with autoimmune thyroiditis. Thus, like radioactive iodine uptake, the serum T3/T4 ratio is useful for differentiating destruction-induced thyrotoxicosis from the stimulation-induced hyperthyroidism of Graves' disease.

Adult↗
PubMed1978

Association of serum antithyroid antibodies with lymphocytic infiltration of the thyroid gland: studies of seventy autopsied cases.

Postmortem histological examination of the thyroid gland and measurement of serum antithyroid antibodies were performed in 70 patients without overt thyroid disease. Lymphocytic infiltration, antithyroglobulin hemagglutination antibody (TGHA), and antithyroid microsomal hemagglutination antibody (MCHA) were found in 12, 2, and 9 cases, respectively. The incidence of lymphocytic infiltration in females was three times that in males. Ten of the 12 cases with lymphocytic infiltration had positive antibodies (either TGHA or MCHA), while 10 of 11 patients with positive antibodies showed lymphocytic infiltration. Thus, the correlation between morphological and serological findings was highly significant at P less than 0.001. The incidence of a small thyroid gland of less than 15 g in weight was higher in patients with lymphocytic infiltration and/or positive antibodies than in patients with a normal thyroid gland. These data suggest that positive serum antithyroid antibodies in subjects without overt thyroid disease may indicate the existence of lymphocytic infiltration in the thyroid gland, that is presumably subclinical autoimmune thyroiditis.

Adult↗
PubMed1978

A new method of paired thyrotropin assay as a screening test for neonatal hypothyroidism.

A simple and reliable method of paired TSH assay was developed and used in screening for neonatal primary hypothyroidism. In this method, a paired assay is first done. Equal parts of the extracts of dried blood spots on filter paper (9 mm diameter) from two infants 4-7 days old are combined and assayed for TSH by double antibody RIA. If the value obtained is over the cut-off point, the extracts are assayed separately for TSH in a second assay to identify the abnormal sample. Two systems, A and B, with different cut-off points were tested. On the basis of reference blood samples (serum levels of TSH, 80 microU/ml in system A and 40 microU/ml in system B), the cut-off point was selected as follows: upper 5 (A) or 4 (B) percentile in the paired assay and values of reference blood samples in the second individual assay. Four cases (2 in A and 2 in B) of neonatal primary hypothyroidism were found among 25 infants (23 in A and 2 in B) who were recalled from a general population 41,400 infants (24,200 in A and 17,200 in B) by 22,700 assays. This paired TSH neonatal hypothyroidism.

Congenital Hypothyroidism↗