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K Kamoi

Publications and source records attributed to K Kamoi.

162 records · Page 9Linked to original sources

Immune complexes in diabetes insipidus syndrome of rabbits immunized with vasopressin.

Rabbits immunized with lysine-vasopressin bovine serum albumin conjugate showed the diabetes insipidus syndrome intermittently manifested by polyuria and polydipsia with various degrees of peaking from the eighth to fourteenth day post injection during boosters. The antibody-antidiuretic hormone immune complexes which may interfere with the action of the endogenous vasopressin on the kidney were found in the diabetes insipidus rabbits. However, the degree of the polyuria was not necessarily related to the quantities of the formed immune complexes, the titer, nor the affinity of the antiserum. It is suggested that the degree of the polyuria is related not only to the binding ability of the antiserum to the endogeneous vasopressin, but also to other factors.

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Acute loading with proteins from different sources in healthy volunteers and diabetic patients.

To evaluate the effects of protein loading on glomerular filtration rate (GFR), urinary excretion rate of albumin (AER), and plasma concentration of amino acids, 10 healthy volunteers and six diabetics were studied before and after eating tuna fish, egg white, cheese, or tofu. Furthermore, to study the possible role of glucagon, growth hormone (GH), atrial natriuretic peptide (ANP), or kallikrein in the responses of GFR, these substances were measured before and after protein loading. GFR increased significantly (p less than .001) after ingestion of tuna fish. No significant differences were seen between the GFR before and that after ingestion of the other foods. AER was unchanged following protein loading. Plasma concentrations of alanine, glycine, and arginine increased to a greater degree after ingestion of tuna fish than after digestion of the other foods. This result suggests that the response of GFR after protein loading may differ from one protein to another, and that these responses may not be directly mediated by glucagon, GH, ANP, or kallikrein.

Adult↗

No association between MTHFR gene polymorphism and diabetic nephropathy in Japanese type II diabetic patients with proliferative diabetic retinopathy.

The development of diabetic nephropathy shows marked variation among individuals. Not only hyperglycemia, but also genetic factors may contribute to the development of diabetic nephropathy. Methylenetetrahydrofolate reductase (MTHFR) is involved in remethylation of homocysteine to methionine. Decreased activity of MTHFR which can result in hyperhomocysteinemia may lead to cerebrovascular disease and coronary artery disease. Recently, a common C to T mutation at nucleotide position 677 of the MTHFR gene (MTHFR677CT) has been reported to be correlated with hyperhomocysteinemia and the severity of coronary artery disease as macroangiopathy. In the present study, we recruited 173 of Japanese type II diabetic patients with proliferative diabetic retinopathy who would be exposed to long-term hyperglycemia, and examined the contribution of the MTHFR gene polymorphism to the development of diabetic nephropathy as microangiopathy. The frequency of the mutated allele was 43.3% in patients with nephropathy (n = 105) versus 41.9% in those without nephropathy (n = 68). The genotype frequencies were +/+, 16.2%; +/-, 54.3%; -/-, 29.5% in patients with nephropathy versus +/+, 13.2%; +/-, 57.4%; -/-, 29.4% in those without nephropathy (+ indicates the presence of the mutation). The MTHFR genotype and allele frequencies were not significantly different between patients with and without nephropathy. Therefore, we conclude that the MTHFR gene polymorphism is not associated with the development of diabetic nephropathy in Japanese type II diabetic patients.

Alleles↗