title: Peripheral olfactory sensitivity in rodents after treatment with docetaxel.
abstract: OBJECTIVE
  Clinical studies have documented that cytotoxic chemotherapy is often associated with body weight loss and decreased enjoyment of food. Besides taste, olfaction plays a role in food intake. We assessed whether systemic chemotherapeutic cancer treatment compromises olfactory function in rats and mice treated with docetaxel (Taxotere; Sanofi-Aventis, Paris, France).
  
  
  METHODS
  Randomized, controlled trials on mice and rats.
  
  
  METHODS
  Male mice received a single and male rats either a single, two, or three docetaxel administrations. Olfactory function was tested by means of electroolfactograms (EOGs) from the chemosensory epithelium of the nasal septum and the endoturbinates. We evaluated and compared the magnitude of EOG responses evoked by different odorants recorded at different time points after treatment.
  
  
  RESULTS
  In both animal species, docetaxel administration reduced body weight gain, thus evidencing the general toxic effect of the drug. In both animal species, the olfactory mucosa remained responsive to stimulation of odorants during the whole course of experiment, but treatment revealed regional differences of docetaxel susceptibility and induced marked transitory electrophysiological changes. In mice and rats a significant transitory decrease in EOG response magnitude occurred after a single administration. Unexpectedly, in rats we also observed an increase of the olfactory response following the second administration of the drug.
  
  
  CONCLUSIONS
  Docetaxel exerts a neurotoxic effect on olfactory epithelia of rodents at doses similar to human doses, thus inducing transitory functional alterations. Although moderate, they are consistent with the hypothesis of a dysfunction of olfactory function. Further experiments are needed to elucidate the origin of the electrophysiological effects and their impact on the olfactory perception.
authors.affiliation: Department of Otolaryngology, Head and Neck Surgery, Hôpital Edouard Herriot, Lyon, Dijon, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Faure
authors.forename: Stéphanie Veloso
authors.initials: SV
authors.lastname: Da Silva
authors.forename: Ingrid
authors.initials: I
authors.lastname: Jakob
authors.forename: Bruno
authors.initials: B
authors.lastname: Pasquis
authors.forename: Gilles
authors.initials: G
authors.lastname: Sicard
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000008:administration & dosage*; D004195:Disease Models, Animal; D000077143:Docetaxel; D004305:Dose-Response Relationship, Drug; D055724:Electrophysiological Phenomena; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D009374:Neoplasms, Experimental / Q000188:drug therapy* / Q000503:physiopathology; D009831:Olfactory Mucosa / Q000187:drug effects / Q000294:innervation; D009833:Olfactory Pathways / Q000187:drug effects / Q000503:physiopathology*; D055696:Olfactory Perception / Q000187:drug effects*; D011838:Radiation-Sensitizing Agents; D051381:Rats; D017208:Rats, Wistar; D012307:Risk Factors; D043823:Taxoids / Q000008:administration & dosage*
chemical_list: D000970:Antineoplastic Agents; D011838:Radiation-Sensitizing Agents; D043823:Taxoids; D000077143:Docetaxel