Terminal arbor degeneration--a novel lesion produced by the antineoplastic agent paclitaxel. 2011

Gary J Bennett, and Guo K Liu, and Wen H Xiao, and Hai W Jin, and Chiang Siau
Department of Anesthesia, McGill University, Montréal, Québec, Canada. gary.bennett@mcgill.ca

The antineoplastic agent paclitaxel causes a dose-limiting distal, symmetrical, sensory peripheral neuropathy that is often accompanied by a neuropathic pain syndrome. In a low-dose model of paclitaxel-evoked painful peripheral neuropathy in the rat, we have shown that the drug causes degeneration of intraepidermal nerve fibers (IENFs), i.e. the fibers which give rise to the sensory afferent's terminal receptor arbor. However, we did not find any evidence for axonal degeneration in samples taken at the mid-nerve level. Here we aimed to determine whether the absence of degenerating peripheral nerve axons was due to sampling a level that was too proximal. We used electron microscopy to study the distal-most branches of the nerves innervating the hind paw glabrous skin of normal and paclitaxel-treated rats. We confirmed that we sampled at a time when IENF degeneration was prominent. Because degeneration might be easier to detect with higher paclitaxel doses, we examined a four-fold cumulative dose range (8-32 mg/kg). We found no evidence of degeneration in the superficial subepidermal axon bundles (sSAB) that are located just a few microns below the epidermal basal lamina. Specifically, for all three dose groups there was no change in the number of sSAB per millimeter of epidermal border, no change in the number of axons per sSAB and no change in the diameter of sSAB axons. We conclude that paclitaxel produces a novel type of lesion that is restricted to the afferent axon's terminal arbor; we name this lesion 'terminal arbor degeneration'.

UI MeSH Term Description Entries
D008297 Male Males
D009410 Nerve Degeneration Loss of functional activity and trophic degeneration of nerve axons and their terminal arborizations following the destruction of their cells of origin or interruption of their continuity with these cells. The pathology is characteristic of neurodegenerative diseases. Often the process of nerve degeneration is studied in research on neuroanatomical localization and correlation of the neurophysiology of neural pathways. Neuron Degeneration,Degeneration, Nerve,Degeneration, Neuron,Degenerations, Nerve,Degenerations, Neuron,Nerve Degenerations,Neuron Degenerations
D009412 Nerve Fibers Slender processes of NEURONS, including the AXONS and their glial envelopes (MYELIN SHEATH). Nerve fibers conduct nerve impulses to and from the CENTRAL NERVOUS SYSTEM. Cerebellar Mossy Fibers,Mossy Fibers, Cerebellar,Cerebellar Mossy Fiber,Mossy Fiber, Cerebellar,Nerve Fiber
D009437 Neuralgia Intense or aching pain that occurs along the course or distribution of a peripheral or cranial nerve. Nerve Pain,Neurodynia,Paroxysmal Nerve Pain,Neuralgia, Atypical,Neuralgia, Iliohypogastric Nerve,Neuralgia, Ilioinguinal,Neuralgia, Perineal,Neuralgia, Stump,Neuralgia, Supraorbital,Neuralgia, Vidian,Neuropathic Pain,Atypical Neuralgia,Atypical Neuralgias,Iliohypogastric Nerve Neuralgia,Iliohypogastric Nerve Neuralgias,Ilioinguinal Neuralgia,Ilioinguinal Neuralgias,Nerve Neuralgia, Iliohypogastric,Nerve Neuralgias, Iliohypogastric,Nerve Pain, Paroxysmal,Nerve Pains,Nerve Pains, Paroxysmal,Neuralgias,Neuralgias, Atypical,Neuralgias, Iliohypogastric Nerve,Neuralgias, Ilioinguinal,Neuralgias, Perineal,Neuralgias, Stump,Neuralgias, Supraorbital,Neuralgias, Vidian,Neurodynias,Neuropathic Pains,Pain, Nerve,Pain, Neuropathic,Pain, Paroxysmal Nerve,Pains, Nerve,Pains, Neuropathic,Pains, Paroxysmal Nerve,Paroxysmal Nerve Pains,Perineal Neuralgia,Perineal Neuralgias,Stump Neuralgia,Stump Neuralgias,Supraorbital Neuralgia,Supraorbital Neuralgias,Vidian Neuralgia,Vidian Neuralgias
D010147 Pain Measurement Scales, questionnaires, tests, and other methods used to assess pain severity and duration in patients or experimental animals to aid in diagnosis, therapy, and physiological studies. Analgesia Tests,Analogue Pain Scale,Formalin Test,McGill Pain Questionnaire,Nociception Tests,Pain Assessment,Pain Intensity,Pain Severity,Tourniquet Pain Test,Visual Analogue Pain Scale,Analog Pain Scale,Assessment, Pain,McGill Pain Scale,Visual Analog Pain Scale,Analgesia Test,Analog Pain Scales,Analogue Pain Scales,Formalin Tests,Intensity, Pain,Measurement, Pain,Nociception Test,Pain Assessments,Pain Intensities,Pain Measurements,Pain Questionnaire, McGill,Pain Scale, Analog,Pain Scale, Analogue,Pain Scale, McGill,Pain Severities,Pain Test, Tourniquet,Questionnaire, McGill Pain,Scale, Analog Pain,Scale, Analogue Pain,Scale, McGill Pain,Severity, Pain,Test, Analgesia,Test, Formalin,Test, Nociception,Test, Tourniquet Pain,Tests, Nociception,Tourniquet Pain Tests
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
D004817 Epidermis The external, nonvascular layer of the skin. It is made up, from within outward, of five layers of EPITHELIUM: (1) basal layer (stratum basale epidermidis); (2) spinous layer (stratum spinosum epidermidis); (3) granular layer (stratum granulosum epidermidis); (4) clear layer (stratum lucidum epidermidis); and (5) horny layer (stratum corneum epidermidis).
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
D000972 Antineoplastic Agents, Phytogenic Agents obtained from higher plants that have demonstrable cytostatic or antineoplastic activity. Antineoplastics, Botanical,Antineoplastics, Phytogenic,Agents, Phytogenic Antineoplastic,Botanical Antineoplastics,Phytogenic Antineoplastic Agents,Phytogenic Antineoplastics
D001522 Behavior, Animal The observable response an animal makes to any situation. Autotomy Animal,Animal Behavior,Animal Behaviors

Related Publications

Gary J Bennett, and Guo K Liu, and Wen H Xiao, and Hai W Jin, and Chiang Siau
March 1994, Connecticut medicine,
Gary J Bennett, and Guo K Liu, and Wen H Xiao, and Hai W Jin, and Chiang Siau
June 1993, Clinical pharmacy,
Gary J Bennett, and Guo K Liu, and Wen H Xiao, and Hai W Jin, and Chiang Siau
June 2004, Clinical cancer research : an official journal of the American Association for Cancer Research,
Gary J Bennett, and Guo K Liu, and Wen H Xiao, and Hai W Jin, and Chiang Siau
September 2007, Clinical therapeutics,
Gary J Bennett, and Guo K Liu, and Wen H Xiao, and Hai W Jin, and Chiang Siau
March 1999, Medical and pediatric oncology,
Gary J Bennett, and Guo K Liu, and Wen H Xiao, and Hai W Jin, and Chiang Siau
January 1988, Life sciences,
Gary J Bennett, and Guo K Liu, and Wen H Xiao, and Hai W Jin, and Chiang Siau
January 2015, Drug design, development and therapy,
Gary J Bennett, and Guo K Liu, and Wen H Xiao, and Hai W Jin, and Chiang Siau
September 2001, Cancer research,
Gary J Bennett, and Guo K Liu, and Wen H Xiao, and Hai W Jin, and Chiang Siau
July 1962, Antibiotiki,
Gary J Bennett, and Guo K Liu, and Wen H Xiao, and Hai W Jin, and Chiang Siau
January 1975, Recent advances in studies on cardiac structure and metabolism,
Copied contents to your clipboard!