title: Extracellular matrix molecules and their possible roles in the regeneration of frog nervous system.
abstract: Recent biochemical and histochemical analyses explored different components of the extracellular matrix (ECM) in the nervous system, and either permissive or non-permissive roles in neuronal development and regeneration were suggested. The aim of this study was to detect the distribution pattern of a few of these molecules in the nervous system of intact frogs and during nerve regeneration. The hyaluronan (HA) and tenascin C reactions were negative in the peripheral nerves, but appeared in their entry zones. In the CNS, different populations of neurons were surrounded with HA and tenascin C-positive material, forming a perineuronal net (PN). The phosphacan reaction was weakly positive in the PNS, and a moderate intensity was detected in the entry zone and in the PN. Laminin and fibronectin immunoreactivity was strong in the PNS, but laminin could not be detected in the CNS. In animals with cut and regenerating vestibulocochlear nerve, the distribution of the ECM molecules in the CNS and PNS characteristically changed from that of the normal pattern. Our results showed a non-homogenous distribution of ECM components in the frog nervous system that could be associated with their different roles in physiological and pathological processes.
authors.affiliation: Department of Anatomy, University of Debrecen, Medical and Health Science Center, Hungary. matesz@chondron.anat.dote.hu
authors.forename: Clara
authors.initials: C
authors.lastname: Matesz
authors.forename: Laszlo
authors.initials: L
authors.lastname: Modis
authors.forename: Gabor
authors.initials: G
authors.lastname: Halasi
authors.forename: Zsuzsa M
authors.initials: ZM
authors.lastname: Szigeti
authors.forename: Szabolcs
authors.initials: S
authors.lastname: Felszeghy
authors.forename: Timea
authors.initials: T
authors.lastname: Bacskai
authors.forename: György
authors.initials: G
authors.lastname: Szekely
mesh_terms: D000818:Animals; D019771:Axotomy / Q000379:methods; D005109:Extracellular Matrix / Q000502:physiology*; D005353:Fibronectins / Q000378:metabolism; D006820:Hyaluronic Acid / Q000378:metabolism; D007150:Immunohistochemistry / Q000379:methods; D007797:Laminin / Q000378:metabolism; D009416:Nerve Regeneration / Q000502:physiology*; D009420:Nervous System / Q000166:cytology / Q000378:metabolism*; D009474:Neurons / Q000378:metabolism; D011893:Rana esculenta; D019063:Tenascin / Q000378:metabolism; D013997:Time Factors; D000159:Vestibulocochlear Nerve / Q000502:physiology; D061285:Vestibulocochlear Nerve Injuries
chemical_list: D005353:Fibronectins; D007797:Laminin; D019063:Tenascin; D006820:Hyaluronic Acid