Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0393754 (HSA)
 2,996 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Human IgG and its Fab fragments were chosen as a model system for studying the desferoxamine (DF) coupling reaction using glutaraldehyde or carbodiimide at various concentrations. The labelling of the IgG-DF conjugates with 67Ga proved to be highly efficient and reproducible. The labelling efficiency in relation to storage time of the conjugate was analysed over a 1-month period by Sephadex-G-50 chromatography. Gel-filtration analysis on Sephacryl S-300 showed that, following the coupling procedure, a high proportion (more than 80%) of the conjugate remained monomeric. Immunoelectrophoresis on agar plates demonstrated that the antibody immunoreactivity was preserved. The biodistribution in mice of the 67Ga-DF-IgG conjugates was comparable to that of the conventional radiopharmaceutical, 125I-HSA. Conditions were established for the coupling of DF to two rat IgG2b monoclonal antibodies M10/76 and 11/160, that are specific for the Hooded rat sarcomata MC 24 and HSN respectively; the immunoreactivity of these conjugates was tested by a cell-binding assay. The data indicate that monoclonal-antibody/DF conjugates prepared with the bifunctional reagent glutaraldehyde maintain their capacity for binding to their tumour-associated antigens.
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PMID:Preparation of 67Ga-labelled human IgG and its Fab fragments using desferoxamine as chelating agent. 407 30

This work was designed to develop a simple, effective, and reliable LC system to identify a chemical marker and compare Sambucus nigra L. and Sambucus australis Cham. et Schltdl. flower extracts (American and European elder). Rutin was the main constituent of both species. The developed method showed a linear response in the range of 10 to 45 microg x mL(-1) for rutin and 1.75 to 3.25 microg x mL(-1) for samples of the Sambucus species. Precision was determined and the relative standard deviations were 1.75 % for HSN and 1.28 % for HSA for intraday precision and 1.28 % and 1.51 % for inter-day precision, respectively, while accuracy was 97.9 % for HSN and 99.41 % for HSA. Quantification and detection limits as well as robustness were determined, presenting adequate results. The LC method showed an adequate performance for the separation of flavonoid glycosides in S. nigra and S. australis extracts, since the presence of interference had been previously evaluated. The analysis of thirty different samples of S. NIGRA and S. australis of different origins did not show significant variability among them. An accelerated stability study revealed a significant decrease in the first 30 days reaching 57 % in 90 days for S. australis samples and a total decrease of 25 % in 90 days for S. nigra samples, considering rutin as the chemical marker. These results will contribute to quality control analysis routines of these raw materials in pharmaceutical production facilities.
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PMID:Comparative analysis of Sambucus nigra and Sambucus australis flowers: development and validation of an HPLC method for raw material quantification and preliminary stability study. 2019 57