Recommended Conferences

Genetic Engineering and Gene Therapy

Paris, France

Human Genetics and Genetic Disorders

Miami, USA

Tissue Engineering and Regenerative Medicine

Chicago, USA
Related Subjects
 

Further observations on hippocampal neurons in dispersed cell culture

Author(s): Banker GA, Cowan WM

Abstract

The growth of the processes of dissociated hippocampal neurons from 18- to 20-day-old rat fetuses has been studied in vitro using a method that permits cells to be maintained at relatively low plating densities for periods up to three weeks (Banker and Cowan, '77). Most of the cells are spherical or ovoid when they first attach to the substratum (either polylysine or collagen) but within 24 to 48 hours they begin to put out processes, and by the end of the first week in culture a significant proportion (∼45%) come to resemble normal pyramidal cells with a more-or-less triangular shaped soma, a single dominant dendrite-like process emerging from the apex of the soma, and several “basal dendrites” arising from the opposite pole of the cell. Comparisons of the lengths of these dendrite-like processes with those of hippocampal cells in the brains of animals sacrificed on the fourth post-natal day and impregnated by a variant of the Golgi-Cox method, indicate that in some cases the rate of process formation in vitro approximates that in vivo and that the general form of the neurons is remarkably like that of immature pyramidal cells. After a week in culture a second type of process can be recognized. These tend to be finer than those we have identified as dendrites; they are relatively uniform in diameter, frequently give off branches at right angles, and in the electron microscope can be seen to form synapses upon the larger processes and cell somata. These axon-like processes differ from the axons of normal pyramidal cells in two important respects: (i) most commonly they arise from one of the dendritic processes, including, on occasion, the putative “apical” dendrites, and only rarely from the base of the perikaryon; (ii) there may be two or more such processes from a single cell. The thicker, tapering processes can be shown (after incubation in 3H-uridine) to contain large amounts of RNA; newly-synthesized RNA does not extend into the finer, axon-like processes.

Similar Articles

Rat hippocampal neurons in dispersed cell culture

Author(s): Banker GA, Cowan WM

C1q induction and global complement pathway activation do not contribute to ALS toxicity in mutant SOD1 mice

Author(s): Lobsiger CS, Boillee S, Pozniak C, Khan AM, McAlonis-Downes M, et al.

A dramatic increase of C1q protein in the CNS during normal aging

Author(s): Stephan AH, Madison DV, Mateos JM, Fraser DA, Lovelett EA, et al.

When, where, and how much? Expression of the Kv3

Author(s): Gan L, Kaczmarek LK

Kv3

Author(s): Yasuda T, Cuny H, Adams DJ

A-type K+ channels encoded by Kv4

Author(s): Carrasquillo Y, Burkhalter A, Nerbonne JM

Functional specialization of the axon initial segment by isoform-specific sodium channel targeting

Author(s): Boiko T, van Wart A, Caldwell JH, Levinson SR, Trimmer JS, et al.

Role of axonal NaV1

Author(s): Royeck M, Horstmann MT, Remy S, Reitze M, Yaari Y, et al.

The role of the Rho GTPases in neuronal development

Author(s): GovekEE, Newey SE, van Aelst L

EphB-mediated degradation of the RhoA GEF Ephexin5 relieves a developmental brake on excitatory synapse formation

Author(s): Margolis SS, Salogiannis J, Lipton DM, Mandel-Brehm C, Wills ZP, et al.

Potential role of culture mediums for successful isolation and neuronal differentiation of amniotic fluid stem cells

Author(s): Orciani M, Emanuelli M, Martino C, Pugnaloni A, Tranquilli AL, et al.