التفاصيل البيبلوغرافية
| العنوان: |
NOS inhibition during postnatal development leads to increased ipsilateral retinocollicular and retinogeniculate projections in rats |
| المؤلفون: |
Vercelli, A., Garbossa, D., Biasiol, S., Repici, M., Jhaveri, S. |
| المصدر: |
European Journal of Neuroscience ; volume 12, issue 2, page 473-490 ; ISSN 0953-816X 1460-9568 |
| بيانات النشر: |
Wiley |
| سنة النشر: |
2000 |
| المجموعة: |
Wiley Online Library (Open Access Articles via Crossref) |
| الوصف: |
Synthesis of nitric oxide (NO) occurs downstream from activation of N‐methyl‐ d ‐aspartate (NMDA) receptors; NO reportedly acts as a retrograde messenger, influencing the refinement and stabilization of coactive afferent terminals. Cells and neuropil in the rat superior colliculus (SC) and lateral geniculate body (LGB) show intense, developmentally regulated activity for NO synthase (NOS). To study the role of NO in the development of retinogeniculate and retinotectal axon arbors, we examined primary visual projections of rats that had received intraperitoneal injections of N ω ‐nitro‐ l ‐arginine (L‐NoArg, an NOS inhibitor) on postnatal day 0, and daily thereafter for 4–6 weeks. Treated rats showed significant alterations in ipsilateral retinotectal projections, in the mediolateral and anteroposterior axes; there was an increase in the density of fibres entering the SC, in branch length, and in the numbers of boutons on retinotectal arbors in the treated group. Ipsilaterally projecting retinal axons also showed an increase in density and distribution in the dorsal nucleus of the LGB. If animals were allowed to survive for several months after stopping treatment, similar changes were also noted, but these were much less striking. Our results support the hypothesis that, in the mammalian visual system, NO released from target neurons in the SC and LGB serves as a retrograde signal which feeds back on retinal afferents, influencing their growth. The effects of NOS inhibition are partially reversed after treatment is stopped, indicating that lack of NO synthesis delays the maturation of retinofugal connections, and also that NO plays a constitutive role in their development. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
English |
| DOI: |
10.1046/j.1460-9568.2000.00925.x |
| الإتاحة: |
https://doi.org/10.1046/j.1460-9568.2000.00925.xTest |
| حقوق: |
http://onlinelibrary.wiley.com/termsAndConditions#vorTest |
| رقم الانضمام: |
edsbas.1DAEF556 |
| قاعدة البيانات: |
BASE |
