Nov 1, 1989

Axonal degeneration and axonal caliber alterations following combined beta,beta'-iminodipropionitrile (IDPN) and acrylamide administration

Journal of Neuropathology and Experimental Neurology
B G Gold, M M Halleck


A new model of neurofilamentous axonal abnormality is described which employs combined administration of beta,beta'-iminodipropionitrile (IDPN) and acrylamide (AC). The model was developed to test the hypothesis that IDPN-induced swelling increases the vulnerability of the distal axon to a second neurotoxic chemical insult. Rats were given a single intraperitoneal (IP) injection of IDPN (1.5 g/kg) one week before receiving a single injection of AC (75 mg/kg, IP). Axonal degeneration was observed at multiple levels along the sciatic nerve at two weeks (with reference to IDPN administration), and was not progressive up to five weeks. Quantitation of degenerating fibers demonstrated that the extent of degeneration increased distally along the sciatic nerve. Single administration of either IDPN or AC did not produce degeneration. Thus, IDPN-induced neurofilamentous swellings alter the susceptibility of the axon to AC neurotoxicity. Two variations of this model were also studied. First, rats given five daily injections of AC (30 mg/kg, IP) beginning one week following IDPN administration developed accumulations of fast axonally transported materials in IDPN-induced microtubule channels. Second, rats given chronic injections of AC (3...Continue Reading

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Mentioned in this Paper

3,3'-iminodipropionitrile sulfate (1: 1)
Axonal Transport
Abnormal Degeneration
Structure of Sciatic Nerve
August Rats
Nerve Degeneration

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