Selective impairment of slowly adapting type 1 mechanoreceptors in mice following vincristine treatment.
Neurosci Lett
; 738: 135355, 2020 11 01.
Article
em En
| MEDLINE
| ID: mdl-32905836
ABSTRACT
Loss of the sense of touch in fingertips and toes is one of the earliest sensory dysfunctions in patients receiving chemotherapy with anti-cancer drugs such as vincristine. However, mechanisms underlying this chemotherapy-induced sensory dysfunction is incompletely understood. Whisker hair follicles are tactile organs in non-primate mammals which are functionally equivalent to human fingertips. Here we used mouse whisker hair follicles as a model system and applied the pressure-clamped single-fiber recording technique to explore how vincristine treatment affect mechanoreceptors in whisker hair follicles. We showed that in vivo treatment of mice with vincristine impaired whisker tactile behavioral responses. The pressure-clamped single-fiber recordings made from whisker hair follicle afferent nerves showed that mechanical stimulations evoked three types of mechanical responses, rapidly adapting response (RA), slowly adapting type 1 response (SA1) and slowly adapting type 2 response (SA2). Vincristine treatment significantly reduced SA1 responses but did not significantly affect RA and SA2 responses. Our findings suggest that SA1 mechanoreceptors were selectively impaired by vincristine leading to the impairment of in vivo whisker tactile behavioral responses.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Vincristina
/
Células de Merkel
/
Folículo Piloso
/
Mecanotransdução Celular
/
Mecanorreceptores
Tipo de estudo:
Prognostic_studies
Limite:
Animals
/
Humans
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article