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1.
Rev Neurol ; 28(7): 665-8, 1999.
Article in Spanish | MEDLINE | ID: mdl-10363290

ABSTRACT

INTRODUCTION AND OBJECTIVE: It is well known that in aged animals cognitive deficit occurs, homologous with that occurring in Alzheimer's disease in humans, and as has been shown in others species, this may be attenuated by administration of nerve growth factor (NGF). Therefore the basic aim of this study was to make an electrophysiological evaluation of the repercussion that there might be after long-term administration of this neurotropin in the sacred baboon (Papio hamadryas) comparing aged with young animals. MATERIAL AND METHODS: We studied a six year old male and a 39 year old female, after sedation. Long-term intraventricular administration of NGF was carried out using a continuous infusion pump, at a dose of 2.1 micrograms/kg/day. Recordings were made before installing the pump and 1, 3 and 6 months after insertion. A Neuropack Four-mini set for evoked potentials (Nihon Kohden) was used to record auditory evoked potentials from the brain stem and visual evoked potentials due to flash. RESULTS AND CONCLUSION: In both animals there were modifications of their electrophysiological responses. These reached a maximum after one month, more markedly in the older animal and this could possibly be related to the neuromodulator effect of NGF.


Subject(s)
Brain/metabolism , Cerebral Ventricles/drug effects , Evoked Potentials , Nerve Growth Factors/pharmacokinetics , Animals , Drug Administration Routes , Female , Follow-Up Studies , Infusion Pumps , Male , Nerve Growth Factors/administration & dosage , Papio/physiology , Time Factors , Tomography, Emission-Computed, Single-Photon
2.
Med. interna Méx ; 13(5): 233-42, sept.-oct. 1997. tab
Article in Spanish | LILACS | ID: lil-227033

ABSTRACT

Desde 1934 se realizaron estudios analizando los efectos que sobre las células sensitivas y neuronas motoras espinales que inervaban las extremidades de animales, producía la extirpación de primordios nerviosos. Las observaciones obtenidas de estos estudios (después de algunos años) permitieron el descubrimiento de un factor promotor del crecimiento neuronal, al cual se designó como factor de crecimiento neuronal (NGF). El NFG es la sustancia mejor caracterizada dentro de una familia de moléculas que se requieren para la supervivencia y el desarrollo de neuronas durante etapas embrionarias del crecimiento y durante la vida adulta. Se ha observado que, bajo ciertas circunstancias, la infusión exógena de BGF puede promover la supervivencia neuronal y la regeneración axonal, por lo cual, en la actualidad, se ha intentado la utilización de este factor para mejorar algunas condiciones patológicas en las cuales el principal componente es el daño neuronal, pudiendo producirse este último por diferentes mecanismos. Dado lo anterior, se ha postulado que la administración de BGF recombinante humano pudiera ser, en el futuro, de utilidad para el tratamiento de enfermedades del sistema nervioso central y periférico, ya que en algunos de los estudios realizados se ha demostrado que este factor puede tener efectos benéficos


Subject(s)
Humans , Motor Neurons/cytology , Motor Neurons/physiology , Nerve Growth Factors/administration & dosage , Nerve Growth Factors/biosynthesis , Nerve Growth Factors/pharmacokinetics , Nerve Growth Factors/physiology , Nervous System/cytology , Nervous System/embryology , Neurons, Afferent/cytology , Neurons, Afferent/physiology , Neurons/cytology
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