Comparison of changes in β-tubulin and NF gene expression in rat DRG neurons under regeneration-permissive and regeneration-prohibitive conditions
| Autor: | Judith Pickett, Yuan Qing Jiang, Monica M. Oblinger |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Male
Neurofilament Nerve Crush medicine.medical_treatment Gene Expression In situ hybridization Biology Rats Sprague-Dawley Lesion Dorsal root ganglion Neurofilament Proteins Tubulin Ganglia Spinal medicine Animals RNA Messenger Axon Molecular Biology In Situ Hybridization Neurons General Neuroscience Blotting Northern medicine.disease Sciatic Nerve Axons Nerve Regeneration Rats Cell biology medicine.anatomical_structure nervous system Crush injury Neurology (clinical) Sciatic nerve medicine.symptom Axotomy DNA Probes Neuroscience Densitometry Developmental Biology |
| Zdroj: | Brain Research. 637:233-241 |
| ISSN: | 0006-8993 |
| DOI: | 10.1016/0006-8993(94)91238-6 |
| Popis: | To examine the question of whether or not prevention of axonal regrowth after injury affects the molecular responses of neurons to axotomy, Northern blotting and in situ hybridization were used to study changes in the mRNA levels of neurofilament (NF) proteins and tubulins in rat dorsal root ganglion (DRG) cells. Adult male rats sustained either a crush lesion of the mid-sciatic nerve (regeneration-permissive condition) or a cut lesion of the sciatic nerve combined with ligation of the proximal nerve stump and removal of a large segment of the distal nerve (regeneration-prohibitive condition). At 14 days post-injury, the relative levels of the low (NF-L) and middle (NF-M) molecular weight NF protein mRNAs, as well as those of beta II- and beta III-tubulin, were examined in the L4 and L5 DRG. The data showed that the levels of NF-L and NF-M mRNAs decreased while beta II- and beta III-tubulin mRNA levels increased in the DRG after either crush axotomy or cut/ligation axotomy of the sciatic nerve, suggesting that the elicitation of these molecular changes by axon disconnection is independent of the ultimate success or failure of the axonal regrowth process. However, cut/ligation axotomy had a more pronounced effect than did crush injury on the mRNA changes. This result suggests that feedback mechanisms from regrowing axons are important in regulating the extent of the cytoskeletal mRNA changes in injured neurons. |
| Databáze: | OpenAIRE |
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