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Biomedical subjects

F Marty

Publications and source records attributed to F Marty.

At least 55 records · Page 3Linked to original sources
PubMed1980

Analytical characterization of beetroot vacuole membrane.

Vacuoles from beetroot (Beta vulgaris L. var. esculenta Gürke) isolated by a mechanical procedure were osmotically lysed to separate the membrane and sap components for analysis. Approximately 62% of the vacuole proteins, 70% of the nondialyzable carbohydrates and almost all of the phospholipids and sterols were recovered in the membrane fraction. The vacuole membrane had a phospholipid protein ratio of 0.68 and a sterol:phospholipid ratio of 0.21. 17 complex polar lipids including phosphatides and glycolipids have been tentatively identified. Phosphatidylcholine (54%) and phosphatidylethanolamine (24%) were the most prominent phosphoglycerides besides phosphatidylserine, phosphatidylglycerol, phosphatidylinositol, and phosphatidic acid (1, 4, 5, and 12%, respectively). A putative sulfoglycoside and two major ceramide glycoside-like lipids, resembling those of animal lysosomes, were identified by thin-layer chromatography. High-resolution SDS-acrylamide gel electrophoresis of the polypeptides from the vacuole revealed 15 major bands with apparent molecular weights ranging from 91,000 to 12,000. Selective elution experiments delineated those polypeptides that were peripheral membrane proteins or sap proteins adsorbed to the membrane, and those that exhibited hydrophobic interactions with the lipid core. Lectin labeling results indicated that most of the polypeptides from the membrane and from the sap were glycoproteins probably of the high-mannose type characteristic of lysosomal enzymes that have undergone several stages of posttranslational modification.

Cell Fractionation↗
PubMed1980

High voltage electron microscopy of membrane interactions in wheat.

Structural interactions between intracellular membranes in root cells of Triticum sativum L. have been investigated with the 3 MeV electron microscope in Toulouse after selective labeling of the membranes with either zinc iodide-osmium tetroxide or phosphotungstate at low pH. Direct membrane continuities between endoplasmic reticulum, Golgi apparatus, and biogenetically derived compartments of the exoplasmic space are more extensive than commonly suggested from conventional electron microscopy. The results are discussed with reference to current concepts suggesting a membrane flow from the endoplasmic reticulum to the terminal components, plasmalemma, and vacuoles.

Endoplasmic Reticulum↗
PubMed1978

Cytochemical studies on GERL, provacuoles, and vacuoles in root meristematic cells of Euphorbia.

The genesis of plant vacuoles has been studied by high-voltage and conventional electron microscopy. Vacuole genesis is a lysosomal multistep process: (i) GERL (Golgi-associated Endoplasmic Reticulum from which Lysosomes apparently form) produces provacuoles into which lysosomal enzymes and probably other materials appear to be concentrated and packaged; (ii) GERL-derived provacuoles cooperate to drive a programmed cellular autophagy leading to young vacuoles; and (iii) the young vacuoles swell and fuse together into a few large mature vacuoles which continue to collect the GERL-derived provacuoles throughout the life of the cell.

Journal Article↗
PubMed1977

[Interest and limits of arteriography in one case of abdomino-pelvic trauma (author's transl)].

Hepatic and pelvic arteriography were carried out in one case of trauma of the liver and pelvis. Initial hepatic arteriography did not give more information than per-operative cholangiography. Secondary hepatic arteriography suggests the presence of lesions which, in fact, do not exist. Pelvic arteriography permitted us to localise on one obturator artery, the origin of a voluminous retroperitoneal hematoma. We were able to stop the hemorrhage by embolisation and this facilitated surgical removal of the hematoma.

Abdominal Injuries↗
PubMed1975

[Myxoma of the left ventricle. Apropos of a successfully operated case].

Left ventricular myxomata are exceptional (12 published cases). In the case reported, the clinical picture included emboli (cerebral and coronary) and syncope. Auscultation, the electrocardiogram and the phonomechanocardiographic tracings suggested an impaired left ventricular ejection, while the left ventriculography demonstrated the tumour and the coronary arteriography its vascular relationship with the right coronary artery. Cure was obtained by surgical removal. In that respect, an attempt was made to describe the clinical and paraclinical bases for the diagnosis of the myxomata of the left ventricle.

Child↗