Dos Reis Izolan L, Bandiera S, Pulcinelli RR, Nin MS, Almeida FB, Marques D, Fontella FU, de Almeida RF, Leal MB, Gomez R. Low-cost apparatus for cigarette smoke exposure in rats.
J Neurosci Methods 2022;
366:109412. [PMID:
34798213 DOI:
10.1016/j.jneumeth.2021.109412]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 09/28/2021] [Accepted: 11/09/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND
The effects of tobacco smoke on the central nervous system are usually studied with isolated nicotine, ignoring other compounds present in cigarette smoke. The few studies that use in vivo whole-body cigarette smoke exposure are usually performed in expensive commercial apparatus.
NEW METHOD
We presented a feasible, safe, and low-cost apparatus for cigarette smoke exposure in rodents.
RESULTS
Rats exposed to cigarette smoke in this apparatus showed cotinine levels similar to human active smokers. Additional results showed that cigarette smoke exposure increased glutamate and aspartic acid levels and decreased leucine, isoleucine, ornithine, phenylalanine, and tryptophan levels in the cerebrospinal fluid of rats.
COMPARISON WITH EXISTING METHOD(S)
Our apparatus is feasible, safe, and costs 67-fold less than a commercial automatized smoking machine. Beyond the low cost, it does not require specialized knowledge for building or maintenance.
CONCLUSIONS
We concluded that our low-cost apparatus is reliable and reproduces cigarette smoke use in humans.
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