Passive stiffness and hydroxyproline content of myocardium hypertrophied by pressure-loading were determined in kittens 2, 8-16, and 24-52 wk after pulmonary artery banding, which initially elevated right ventricular systolic pressure by 10-15 mm Hg. Right ventricular mass increased by approximately 75%, three-quarters of which occurred during the first 2 wk after banding. Passive stiffness was...

An organotypic explant coculture method is described for the developing retinogeniculate pathway of the cat. Retinal explants and thalamic slices containing the dorsal lateral geniculate nucleus (LGN), derived from early postnatal kittens, can be grown in serum-free culture medium for several days. In such cultures, retinal ganglion cells (RGCs) and LGN neurons retained their age-specific morph...

It is now well established that the anatomical and functional development of the central visual pathways of a number of higher mammalian species is activity-dependent [1-3]. This dependence was revealed by the functional effects of an early period of monocular deprivation, where one eye of a young animal was deprived for a time of patterned visual input. Subsequently, most cells in the visual c...

Growth assays and nitrogen balance trials were conducted in an attempt to estimate requirements for threonine, isoleucine, valine and leucine. Weanling kittens were fed a basal purified diet containing 27% crystalline L-amino acids and 4,700 kcal metabolizable energy per kilogram diet. Based upon rate and efficiency of growth, and upon urinary nitrogen excretion, estimated requirements for thre...

niques: a comparison between ABC and unlabelled antibody (PAP) procedures. J Histochem Cytochem 29: 577-580, 1981 9 LeCouteur RA, Kornegay JN, Higgins RJ: Late onset progressive cerebellar degeneration of Brittany spaniel dogs. Proc Am Coll Vet Intern Med 6:657-658, 1988 10 Montgomery DL, Storts RW: Hereditary striatonigral and cerebello-olivary degeneration of the Keny Blue Terrier. Vet Pathol...

Recent studies have identified the potential for an important role for serotonin (5-HT) receptors in the developmental plasticity of the kitten visual cortex. 5-HT(2C) receptors are transiently expressed in a patchy fashion in the visual cortex of kittens between 30-80 days of age complementary to patches demarcated by cytochrome oxidase staining. 5-HT, operating via 5-HT(2C) receptors, increas...

Keratometric measurements were made from 38 kittens and cats in a closed breeding colony. Data were obtained on changes of radius of curvature of the cornea as a function of age and weight. The measurements also provided data on estimated changes with growth of corneal astigmatism.

A six-weeks-old, female kitten presented with dehydration, depression, atresia ani and a discharge of watery feces from the vulvar opening. On radiographic examination, blind-end rectum was determined to be >1 cm cranial anal dimple, classifying it as type III ani. Atresia combined rectovaginal fistula is an uncommon congenital defect terminal anus that can occur in kittens. After supportive...