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Titolo:
Proliferative activity and motoneurone recruitment persist at the spinal cord central canal during larval and some postlarval stages in the rainbow trout (Oncorhynchus mykiss)
Autore:
Alunni, A; Pierucci, F; Aita, M; Margotta, V; De Vita, R; Alfei, L;
Indirizzi:
Univ Rome La Sapienza, Dept Anim & Human Biol, I-00161 Rome, Italy Univ Rome La Sapienza Rome Italy I-00161 Human Biol, I-00161 Rome, Italy Univ Rome La Sapienza, Dept Physiol, I-00185 Rome, Italy Univ Rome La Sapienza Rome Italy I-00185 pt Physiol, I-00185 Rome, Italy ENEA Casaccia, Environm Epidemiol Unit, I-00060 Rome, Italy ENEA CasacciaRome Italy I-00060 onm Epidemiol Unit, I-00060 Rome, Italy
Titolo Testata:
EUROPEAN JOURNAL OF HISTOCHEMISTRY
fascicolo: 2, volume: 45, anno: 2001,
pagine: 191 - 202
SICI:
1121-760X(2001)45:2<191:PAAMRP>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
CELL NUCLEAR ANTIGEN; DESCENDING PROJECTION NEURONS; PCNA CYCLIN; MONOCLONAL-ANTIBODY; CARASSIUS-AURATUS; SALMO-GAIRDNERI; ADULT GOLDFISH; DENTATE GYRUS; MUSCLE-FIBERS; GROWTH;
Keywords:
PCNA; immunohistochemistry; cervical and caudal spinal cord; morphometry; neurogenesis; regeneration;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
54
Recensione:
Indirizzi per estratti:
Indirizzo: Alfei, L Univ Rome La Sapienza, Dept Anim & Human Biol, Via Alfonso Borelli 50, I-00161 Rome, Italy Univ Rome La Sapienza Via Alfonso Borelli 50 Rome Italy I-00161
Citazione:
A. Alunni et al., "Proliferative activity and motoneurone recruitment persist at the spinal cord central canal during larval and some postlarval stages in the rainbow trout (Oncorhynchus mykiss)", EUR J HIST, 45(2), 2001, pp. 191-202

Abstract

We previously found a linear relationship between the cross sectional myotomal area and the motoneurone number in the growing trout during postlarvalstages. These neurones increased in number until a fish length of 150 mm, which prompted us to examine how motor neurones are recruited afterwards tomeet the growth of their target myotomal muscle. Young adult (260 mm in length), fingerlings (F, 120-170 mm), fry (Fr, 70 mm) and eleutherembryos (Es, 20-30 mm) of rainbow trout (Oncorhyncus mykiss)were employed in this study. PCNA immunohistochemistry was used for monitoring the proliferative activity in the epithelium of the spinal cord central canal. This activity was quantified as the number of PCNA labelled cells for each spinal cord section. In Es and Fry, a mean value of 3-5 labelled cells for each section was found with a sharp decrease in young F (120 mm long). After this fish length, it was not possible to quantitatively evaluatethe proliferative activity at the central canal. However, labelled cells were seldom found in the spinal cord sections until a fish length of 260 mm. From these data it is possible to conclude that motoneurone recruitment inthe trout spinal cord is down-regulated at the F stage. Afterwards, we found that motoneurones increase in size to meet the growth of their target myotomal muscle.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 02:51:52