Biomaterial Database

[Ultrastructural characteristics of the tubular histion in the system of nephron protein reabsorption in massive proteinuria]. 2005

E I Val'kovich, and M V Stoliarova

18 puncture renal biopsies obtained from children aged 6-12 years with primary nephrotic syndrome were studied using electron microscopic to examine the components of tubular histion in the system of nephron protein reabsorption in massive proteinuria. The results indicate changes in the interstitial connective tissue associated with collagen formation. The endothelium of peritubular capillaries demonstrated both adaptive and destructive. One of the manifestations of adaptive reactions was an additional pinocytotic vesicular mechanism of protein transport through the endothelium, described in this paper. Fenestrations are regarded as specialized cellular structures which may be formed in different cytoplasmic areas. Evidence is presented to substantiate the cascade pattern in the development of changes in the proximal tubule epithelium-interstitial connective tissue-capillary endothelium system.

UI	MeSH Term	Description	Entries
D007684	Kidney Tubules	Long convoluted tubules in the nephrons. They collect filtrate from blood passing through the KIDNEY GLOMERULUS and process this filtrate into URINE. Each renal tubule consists of a BOWMAN CAPSULE; PROXIMAL KIDNEY TUBULE; LOOP OF HENLE; DISTAL KIDNEY TUBULE; and KIDNEY COLLECTING DUCT leading to the central cavity of the kidney (KIDNEY PELVIS) that connects to the URETER.	Kidney Tubule,Tubule, Kidney,Tubules, Kidney
D008854	Microscopy, Electron	Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen.	Electron Microscopy
D009399	Nephrons	The functional units of the kidney, consisting of the glomerulus and the attached tubule.	Nephron
D011507	Proteinuria	The presence of proteins in the urine, an indicator of KIDNEY DISEASES.	Proteinurias
D012079	Renal Circulation	The circulation of the BLOOD through the vessels of the KIDNEY.	Kidney Circulation,Renal Blood Flow,Circulation, Kidney,Circulation, Renal,Blood Flow, Renal,Flow, Renal Blood
D002196	Capillaries	The minute vessels that connect arterioles and venules.	Capillary Beds,Sinusoidal Beds,Sinusoids,Bed, Sinusoidal,Beds, Sinusoidal,Capillary,Capillary Bed,Sinusoid,Sinusoidal Bed
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D003238	Connective Tissue	Tissue that supports and binds other tissues. It consists of CONNECTIVE TISSUE CELLS embedded in a large amount of EXTRACELLULAR MATRIX.	Connective Tissues,Tissue, Connective,Tissues, Connective
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D021381	Protein Transport	The process of moving proteins from one cellular compartment (including extracellular) to another by various sorting and transport mechanisms such as gated transport, protein translocation, and vesicular transport.	Cellular Protein Targeting,Gated Protein Transport,Protein Targeting, Cellular,Protein Translocation,Transmembrane Protein Transport,Vesicular Protein Transport,Protein Localization Processes, Cellular,Protein Sorting,Protein Trafficking,Protein Transport, Gated,Protein Transport, Transmembrane,Protein Transport, Vesicular,Traffickings, Protein