Biomaterial Database

[Ultrastructural study of experimental cerebrocortical necrosis in calves (author's transl)]. 1978

J Askaa, and T Møller

Cerebrocortical necrosis (CCN) was experimentally induced in three calves with the thiamine antagonist Amprolium. The calves were followed clinically. At the time of development of typical clinical signs of CCN the calves were killed and necropsied and a complete histopathologic examination was performed. The light microscopic lesions of the cerebral cortex were those of middle laminar necrosis and deep laminar edema. The necrotic zone consisted of fine vesicles and differed only slightly from the edema zone. In the former some neurons were morphologically normal, others showed signs of injury, while in the latter all neurons were injured. The lesions are consistent with those found in natural cases of CCN. Biopsies from the cerebral cortex were taken at the time of early clinical signs. Ultrastructural studies of these biopsies showed no clear difference between the zones of necrosis and edema observed light microscopically. The ultrastructural changes were characterized by dilatations in the neuropil. The cytoplasm and foot plates of the astrocytes had a "watery" appearance and contained dilated mitochondria and large vesicles. The vesicles were continuous with the granular endoplasmic reticulum. It was concluded that the initial morphologic changes in CCN in calves were indicative of a cytotoxic edema of the astrocytes. This may be due to a cytotoxic edema with subsequent loss of cell volume control. The primary astrocytic changes could then lead to neuronal injury.

UI	MeSH Term	Description	Entries
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
D009336	Necrosis	The death of cells in an organ or tissue due to disease, injury or failure of the blood supply.
D001927	Brain Diseases	Pathologic conditions affecting the BRAIN, which is composed of the intracranial components of the CENTRAL NERVOUS SYSTEM. This includes (but is not limited to) the CEREBRAL CORTEX; intracranial white matter; BASAL GANGLIA; THALAMUS; HYPOTHALAMUS; BRAIN STEM; and CEREBELLUM.	Intracranial Central Nervous System Disorders,Brain Disorders,CNS Disorders, Intracranial,Central Nervous System Disorders, Intracranial,Central Nervous System Intracranial Disorders,Encephalon Diseases,Encephalopathy,Intracranial CNS Disorders,Brain Disease,Brain Disorder,CNS Disorder, Intracranial,Encephalon Disease,Encephalopathies,Intracranial CNS Disorder
D002417	Cattle	Domesticated bovine animals of the genus Bos, usually kept on a farm or ranch and used for the production of meat or dairy products or for heavy labor.	Beef Cow,Bos grunniens,Bos indicus,Bos indicus Cattle,Bos taurus,Cow,Cow, Domestic,Dairy Cow,Holstein Cow,Indicine Cattle,Taurine Cattle,Taurus Cattle,Yak,Zebu,Beef Cows,Bos indicus Cattles,Cattle, Bos indicus,Cattle, Indicine,Cattle, Taurine,Cattle, Taurus,Cattles, Bos indicus,Cattles, Indicine,Cattles, Taurine,Cattles, Taurus,Cow, Beef,Cow, Dairy,Cow, Holstein,Cows,Dairy Cows,Domestic Cow,Domestic Cows,Indicine Cattles,Taurine Cattles,Taurus Cattles,Yaks,Zebus
D002418	Cattle Diseases	Diseases of domestic cattle of the genus Bos. It includes diseases of cows, yaks, and zebus.	Bovine Diseases,Bovine Disease,Cattle Disease,Disease, Bovine,Disease, Cattle,Diseases, Bovine,Diseases, Cattle
D002540	Cerebral Cortex	The thin layer of GRAY MATTER on the surface of the CEREBRAL HEMISPHERES that develops from the TELENCEPHALON and folds into gyri and sulci. It reaches its highest development in humans and is responsible for intellectual faculties and higher mental functions.	Allocortex,Archipallium,Cortex Cerebri,Cortical Plate,Paleocortex,Periallocortex,Allocortices,Archipalliums,Cerebral Cortices,Cortex Cerebrus,Cortex, Cerebral,Cortical Plates,Paleocortices,Periallocortices,Plate, Cortical
D000670	Amprolium	A veterinary coccidiostat that interferes with THIAMINE metabolism.	Amprol,Amprolium Chloride,Amprolium Hydrochloride,Anticoccid,Noé-Socopharm Hydrochloride,Némaprol,Pyridinium, 1-((4-Amino-2-propyl-5-pyrimidinyl)methyl)-2-methyl-, Chloride (1:1),Chloride, Amprolium,Hydrochloride, Amprolium,Hydrochloride, Noé-Socopharm,Noé Socopharm Hydrochloride
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013832	Thiamine Deficiency	A nutritional condition produced by a deficiency of THIAMINE in the diet, characterized by anorexia, irritability, and weight loss. Later, patients experience weakness, peripheral neuropathy, headache, and tachycardia. In addition to being caused by a poor diet, thiamine deficiency in the United States most commonly occurs as a result of alcoholism, since ethanol interferes with thiamine absorption. In countries relying on polished rice as a dietary staple, BERIBERI prevalence is very high. (From Cecil Textbook of Medicine, 19th ed, p1171)	Deficiency, Thiamine,Deficiencies, Thiamine,Thiamine Deficiencies