Olfactory sensory neurons (OSNs) are continually generated throughout life. Although previous studies have examined neurogenesis in olfactory cell cultures derived from embryonic or newborn rodents, we demonstrate neurogenesis in cell cultures derived from adult rat tissues. Dissociated cells taken from adult rat nasal mucosal tissues (ANM cells) were plated onto a feeder layer of newborn rat c...

The electrical activity of adult mouse and rat hearts has been analyzed extensively, often as a prerequisite for genetic engineering studies or for the development of rodent models of human diseases. Some aspects of the initiation and conduction of the cardiac action potential in rodents closely resemble those in large mammals. However, rodents have a much higher heart rate and their ventricula...

Rat pheochromocytoma PCI 2 cells form tumors when placed into the brains of Sprague-Dawley rats under specific conditions. We now show that tumorigenic potential is regulated by the microenvironment of the developing cerebrum. PCI 2 cell aggregates were identified in the periventricular or intraventricular spaces within 24 h after injection of cell suspensions into rat brains. In fetal or young...

Rat pheochromocytoma PCI 2 cells form tumors when placed into the brains of Sprague-Dawley rats under specific conditions. We now show that tumorigenic potential is regulated by the microenvironment of the developing cerebrum. PCI 2 cell aggregates were identified in the periventricular or intraventricular spaces within 24 h after injection of cell suspensions into rat brains. In fetal or young...

We have recently reported that minimally disturbed adult CNS white matter can support regeneration of adult axons by using a novel microtransplantation technique to inject minute volumes of dissociated adult rat dorsal root ganglion neurons directly into adult rat CNS pathways (Davies et al., 1997). This atraumatic injection procedure minimized scarring and allowed considerable numbers of regen...

spinal cord injury (sci) is a destructive condition that the cord can't send signals below the level of the injury. despite advances in the medical and surgical care of sci patients, no effective treatment exists for the neurological deficits of sci. cell therapy is a new approach for sci, and preclinical models demonstrate that cell transplantation can improve some secondary events throug...

introduction: repetitive cortical spreading depression (csd) can lead to cell death in immature brain tissue. caspases are involved in neuronal cell death in several csd-related neurological disorders. yet, whether repetitive csd itself can induce caspase activation in adult or juvenile tissue remains unknown. inducing repetitive csd in somatosensory cortices of juvenile and adult rats in vivo,...

Mean serum testosterone concentration in the 27-day-old prepubertal Holtzman rat was 0\m=.\25ng/ml, much lower than that observed in the adult male, 5\m=.\5ng/ml. Within 15 min after the intravenous injection of rat LH (in a dose of 400 ng-equiv. NIH-LH-S1/100 g body weight) serum testosterone concentration in the prepubertal rat increased approximately fivefold. Maximal elevation of serum test...

BACKGROUND Organotypic tissue culture of adult rodent retina with an acute gene transfer that enables the efficient introduction of variable transgenes would greatly facilitate studies into retinas of adult rodents as animal models. However, it has been a difficult challenge to culture adult rodent retina. The purpose of this present study was to develop organotypic tissue culture of adult rode...

the overall goal of this study was to identify the appropriate biomaterials able to facilitate the regeneration in rat's injured adult spinal cord. acute damage to axons is manifested as a breach in their membranes, ionexchange distortion across the compromised region, local depolarization and even conduction block. it would be of particular importance to interrupt the progress of events h...