PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 6652910

Decrease of lactoferrin concentration in the tears of myotonic muscular dystrophy patients.

P K Tsung·B S Hong·F J Holly·W Gordon
View original source ↗Export metadata ↓

Abstract

Tears from myotonic muscular dystrophy (MMD) patients and normal controls were analyzed for their tear proteins by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Lactoferrin comprised about 18% of the total tear protein in MMD patients as opposed to about 27% in normals. The albumin content relative to total protein in MMD tears was about 25% while the same value for normals is 13%. The lactoferrin/albumin ratio, was about 0.8 for MMD patients and about 2.1 for normals.

Explore related subjects

Erythrocyte MembraneHumansImmunoelectrophoresisLactoferrinLactoglobulinsMuscular DystrophiesRosaniline DyesTearsJournal ArticleResearch Support, Non-U.S. Gov'tResearch Support, U.S. Gov't, P.H.S.

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

P K Tsung, B S Hong, F J Holly, W Gordon. 1983-10-31. Decrease of lactoferrin concentration in the tears of myotonic muscular dystrophy patients.. https://doi.org/10.1016/0009-8981(83)90199-7

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2006

Reduced diversity of the human erythrocyte membrane sialic acids in polycythemia vera. Absence of N-glycolylneuraminic acid and characterisation of N-acetylneuraminic acid 1,7 lactone.

Sialic acids from the erythrocyte (RBC) membrane of a patient suffering from polycythemia vera, a malignant orphan disorder of hematopoietic cells, was studied using GC/MS. We found that the sialic acid diversity of these membranes was drastically reduced since only four entities were identified: Neu5Ac (91.5%) and its 1,7 lactone Neu5Ac1,7L (7.5%) which is absent in normal RBC, Neu4,5Ac(2) (0.50%) and Neu4,5Ac(2) 9Lt (0.50%); in normal RBC, Neu5,7Ac(2), Neu5,9Ac(2), Neu5Ac9Lt, Neu5Ac8S and Neu, as well as traces of Kdn, were also present. Neu5Gc and its O-alkylated or O-acetylated derivatives, which are considered by various authors as cancer markers, were not detected.

Erythrocyte Membrane↗
PubMed2006

Flavonoids from italian multifloral honeys reduce the extracellular ferricyanide in human red blood cells.

In this study we investigated some biological properties of flavonoids recovered in the aqueous (AqE) and ether (EtE) extracts from four Italian multifloral honeys. In particular, a cell-free assay was employed to detect direct reduction of ferricyanide, whereas an assay using intact human erythrocytes was used to measure the ability to donate electrons to a trans-plasma membrane oxidoreductase. It was found that the AqE displays greater "in vitro" ferricyanide-reducing activity than the EtE but, unlike the latter, is virtually ineffective in the cell-based assay. Uptake studies employing high-performance liquid chromatography/mass spectrometry (HPLC/MS) showed that the different results were explained by the inability of AqE components to cross the erythrocyte plasma membrane and by the excellent uptake of EtE flavonoids, which, once within the cell, donate electrons to the membrane oxidoreductase to efficiently reduce extracellular oxidants. The latter property appears to depend on the content of ether-soluble flavonoids in the starting honeys.

Erythrocyte Membrane↗