The Vitamin-B12 Activity of Mullet and Shark Serum

The determination of vitamin B12 activity in human serum.

Studies on the microbiological assay of vitamin Bn in serum and blood have recently been reported, with Euglena gracilis var. bacillaris and La&baciZZus Zeichmannii as the test organisms (l-3). The studies by Ross (1) indicate that vitamin Blz in serum is present, in part, in a form not available to microorganisms unless the serum is previously heated. In the present work, a detailed study has ...

The relationship between serum vitamin D and vitamin B12 levels and diabetic peripheral neuropathy

Abstract Objective: Diabetic peripheral neuropathy (DPN) is one of the most common complications of diabetes. Beside the known factors such as hyperglycemia in the pathogenesis of this complication, other etiologies may play role in the pathogenesis of this complication. The aim of this study was the evaluation of the role of serum vitamin D and vitamin B12 levels in this process. Material a...

Serum erythropoietin and erythroid activity in vitamin B12 deficiency.

We studied erythropoiesis in 31 patients with vitamin B12 deficiency by measuring serum erythropoietin (s-Epo), serum transferrin receptor (s-TfR, taken as an index of total erythroid activity), reticulocyte count, and the reticulocyte maturation index (RMI). s-Epo and s-TfR were measured with commercial immunoassays, whereas reticulocyte count and RMI were determined by flow cytometry. s-Epo (...

Serum Acylcarnitines and Vitamin B12 Deficiency, Mark

Serum Acylcarnitines and Vitamin B12 Deficiency, Mark M. Kushnir, Bori Shushan, William L. Roberts, and Marzia Pasquali ( ARUP Institute for Clinical and Experimental Pathology, Salt Lake City, UT 84108; 2 MDS SCIEX, Concord, ON, L4K 4V8 Canada; 3 Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84132; * author for correspondence: fax 801-584-5207, email kushnm...

Clinical application of serum vitamin B12 assay.