Biomaterial Database

Sprouting and synapse formation produced by Carbocaine. 1984

M Tal, and S Rotshenker

Injury to one cutaneous pectoris nerve of the frog induces sprouting of and synapse formation by the contralateral homologous intact nerve. It was previously suggested that axotomy initiates a signal for growth in the cell bodies of the injured motor neurons and that this signal is transferred transneuronally across the spinal cord to intact motor neurons (e.g., Rotshenker, S. (1982) J. Neurosci. 2: 1359-1368). The present study was designed to test the hypothesis that axotomy initiated the signal for growth by depriving neuronal somata of a trophic substance derived from the target muscle. The superficial layer of muscle fibers comprising one cutaneous pectoris muscle, the source of the hypothetical trophic substance, was removed by means of local application of the myotoxic local anesthetic Carbocaine. An increased supernumerary pattern of innervation developed in drug-treated muscles first and in contralateral intact muscles thereafter. These results raise the possibility that target muscle fibers play a role as regulators of a signal for growth in the cell bodies of their innervating motor neurons.

UI	MeSH Term	Description	Entries
D008619	Mepivacaine	A local anesthetic that is chemically related to BUPIVACAINE but pharmacologically related to LIDOCAINE. It is indicated for infiltration, nerve block, and epidural anesthesia. Mepivacaine is effective topically only in large doses and therefore should not be used by this route. (From AMA Drug Evaluations, 1994, p168)	Carbocaine,Carbocaïne,Isocaine,Isogaine,Meaverin,Mecain,Mepihexal,Mepivacain-Injektopas,Mepivacaina Braun,Mepivacaine Hydrochloride,Mepivacaine Monohydrochloride,Mepivastesin,Polocaine,Scandicain,Scandicaine,Scandinibsa,Scandonest,Mepivacain Injektopas
D009132	Muscles	Contractile tissue that produces movement in animals.	Muscle Tissue,Muscle,Muscle Tissues,Tissue, Muscle,Tissues, Muscle
D009474	Neurons	The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM.	Nerve Cells,Cell, Nerve,Cells, Nerve,Nerve Cell,Neuron
D010525	Peripheral Nerves	The nerves outside of the brain and spinal cord, including the autonomic, cranial, and spinal nerves. Peripheral nerves contain non-neuronal cells and connective tissue as well as axons. The connective tissue layers include, from the outside to the inside, the epineurium, the perineurium, and the endoneurium.	Endoneurium,Epineurium,Perineurium,Endoneuriums,Epineuriums,Nerve, Peripheral,Nerves, Peripheral,Perineuriums,Peripheral Nerve
D011894	Rana pipiens	A highly variable species of the family Ranidae in Canada, the United States and Central America. It is the most widely used Anuran in biomedical research.	Frog, Leopard,Leopard Frog,Lithobates pipiens,Frogs, Leopard,Leopard Frogs
D012038	Regeneration	The physiological renewal, repair, or replacement of tissue.	Endogenous Regeneration,Regeneration, Endogenous,Regenerations
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013569	Synapses	Specialized junctions at which a neuron communicates with a target cell. At classical synapses, a neuron's presynaptic terminal releases a chemical transmitter stored in synaptic vesicles which diffuses across a narrow synaptic cleft and activates receptors on the postsynaptic membrane of the target cell. The target may be a dendrite, cell body, or axon of another neuron, or a specialized region of a muscle or secretory cell. Neurons may also communicate via direct electrical coupling with ELECTRICAL SYNAPSES. Several other non-synaptic chemical or electric signal transmitting processes occur via extracellular mediated interactions.	Synapse