Neurobehavioral impairments in ciprofloxacin- treated osteoarthritic adult rats

Ideggyogy Sz. 2023 Sep 30;76(9-10):327-337. doi: 10.18071/isz.76.0327.

Abstract

Background and purpose: <p>Ciprofloxacin (CIP) is a broad-spectrum antibiotic widely used in clinical practice to treat musculoskeletal infections. Fluoroquinolone-induced neurotoxic adverse events have been reported in a few case reports, all the preclinical studies on its neuropsychiatric side effects involved only healthy animals. This study firstly investigated the behavioral effects of CIP in an osteoarthritis rat model with joint destruction and pain, which can simulate inflammation-associated musculoskeletal pain. Furthermore, effects of CIP on regional brain-derived neurotrophic factor (BDNF) expression were examined given its major contributions to the neuromodulation and plasticity underlying behavior and cognition.&nbsp;</p>.

Methods: <p>Fourteen days after induction of chronic osteoarthritis, animals were administered vehicle, 33 mg/kg or 100 mg/kg CIP for five days intraperitoneally. Motor activity, behavioral motivation, and psychomotor learning were examined in a reward-based behavioral test (Ambitus) on Day 4 and sensorimotor gating by the prepulse inhibition test on Day 5. Thereafter, the prolonged BDNF mRNA and protein expression levels were measured in the hippocampus and the prefrontal cortex.&nbsp;</p>.

Results: <p>CIP dose-dependently reduced both locomotion and reward-motivated exploratory activity, accompanied with impaired learning ability. In contrast, there were no significant differences in startle reflex and sensory gating among treatment groups; however, CIP treatment reduced motor activity of the animals in this test, too. These alterations were associated with reduced BDNF mRNA and protein expression levels in the hippocampus but not the prefrontal cortex.&nbsp;</p>.

Conclusion: <p>This study revealed the detrimental effects of CIP treatment on locomotor activity and motivation/learning ability during osteoarthritic condition, which might be due to, at least partially, deficient hippocampal BDNF expression and ensuing impairments in neural and synaptic plasticity.</p>.

Background and purpose: <p>A ciprofloxacin (CIP) egy sz&eacute;les spektrum&uacute; antibiotikum, amit gyak&shy;ran haszn&aacute;lnak mozg&aacute;sszervrendszeri fertő&shy;z&eacute;&shy;sek kezel&eacute;s&eacute;re is. Klinikai esettanul&shy;m&aacute;&shy;nyok besz&aacute;molnak a fluorokinolonok neurotoxikus mell&eacute;khat&aacute;sair&oacute;l, ugyanakkor a neuropszichi&aacute;triai mell&eacute;khat&aacute;sokat vizsg&aacute;l&oacute; preklinikai tanulm&aacute;nyok mind eg&eacute;szs&eacute;ges &aacute;llatokat haszn&aacute;lnak. Ez az első olyan kís&eacute;rletsorozat, amely a CIP viselked&eacute;sre gyakorolt hat&aacute;sait osteoarthritises patk&aacute;nyokon vizsg&aacute;lja, ahol az íz&uuml;leti k&aacute;rosod&aacute;s okozta f&aacute;jdalom modellezheti a gyullad&aacute;sos eredetű mozg&aacute;sszervi f&aacute;jdalmat. A kís&eacute;rletsorozat vizsg&aacute;lja tov&aacute;bb&aacute; az agyi eredetű n&ouml;veked&eacute;si faktor- (Brain-Derived Neurotrophic Factor, BDNF) expresszi&oacute; elh&uacute;z&oacute;d&oacute;, r&eacute;gi&oacute;specifikus v&aacute;ltoz&aacute;s&aacute;t az agyban CIP-kezel&eacute;s hat&aacute;s&aacute;ra, ami neuromodul&aacute;tork&eacute;nt hozz&aacute;j&aacute;rulhat a viselked&eacute;sbeli &eacute;s kognitív v&aacute;ltoz&aacute;sok kialakul&aacute;s&aacute;hoz.&nbsp;</p>.

Methods: <p>Tizenn&eacute;gy nappal a kr&oacute;nikus osteoarthritist kiv&aacute;lt&oacute; monoj&oacute;d-acet&aacute;t- (MIA) injekci&oacute; ut&aacute;n az &aacute;llatok 5 napig intra&shy;perito&shy;nea&shy;lisan kapt&aacute;k a CIP k&eacute;t d&oacute;zis&aacute;t (33 mg/kg vagy 100 mg/kg), illetve az old&oacute;szert. A ke&shy;ze&shy;l&eacute;s negyedik napj&aacute;n egy jutalmaz&aacute;son alapul&oacute; viselked&eacute;si tesztben (Ambitus) az &aacute;llatok motoros aktivit&aacute;s&aacute;t, motiv&aacute;ci&oacute;j&aacute;t &eacute;s pszichomotoros tanul&aacute;si k&eacute;pess&eacute;g&eacute;t vizsg&aacute;ltuk, az &ouml;t&ouml;dik napon pedig a szenzoros kapuz&aacute;s m&eacute;r&eacute;s&eacute;re prepulzus-g&aacute;tl&aacute;s- (PPI) tesztet v&eacute;gezt&uuml;nk. Ezt k&ouml;vetően a BDNF mRNS- &eacute;s feh&eacute;rje-expresszi&oacute;j&aacute;t m&eacute;rt&uuml;k a hippocampus &eacute;s a prefront&aacute;lis k&eacute;reg ter&uuml;let&eacute;n.&nbsp;</p>.

Results: <p>A CIP-kezel&eacute;s d&oacute;zisf&uuml;ggően rontotta az &aacute;llatok tanul&aacute;si k&eacute;pess&eacute;g&eacute;t, ami kapcsolatban &aacute;llhat a cs&ouml;kkent lokomotoros &eacute;s explor&aacute;toros aktivit&aacute;ssal is. Ugyanakkor nem tal&aacute;ltunk szignifk&aacute;ns k&uuml;l&ouml;nbs&eacute;get a csoportok k&ouml;zt a megriad&aacute;si (startle) reflexben &eacute;s a szenzoros kapuz&aacute;sban, annak ellen&eacute;re, hogy az anitbiotikummal kezelt &aacute;llatok ebben a tesztben is kisebb aktivit&aacute;st mutattak. A viselked&eacute;sbeli v&aacute;ltoz&aacute;sok mellett cs&ouml;kkent BDNF mRNS- &eacute;s feh&eacute;rjeexpresszi&oacute;t m&eacute;rt&uuml;nk a hippocampusban, ami viszont nem jelentkezett a prefront&aacute;lis k&eacute;reg ter&uuml;let&eacute;n.&nbsp;</p>.

Conclusion: <p>Az eredm&eacute;nyek igazolt&aacute;k a CIP-kezel&eacute;s k&aacute;ros hat&aacute;sait a lokomotoros aktivit&aacute;sra &eacute;s a motiv&aacute;ci&oacute;s/tanul&aacute;si k&eacute;pess&eacute;gre osteoarthritis fenn&aacute;ll&aacute;sa mellett. Ez feltehetően kapcsolatban &aacute;ll a hippocampus elh&uacute;z&oacute;d&oacute;, cs&ouml;kkent BDNF-expresszi&oacute;j&aacute;val, igazolva a neuronalis &eacute;s szinaptikus plaszticit&aacute;s k&aacute;rosod&aacute;s&aacute;nak szerep&eacute;t a neurotoxikus mell&eacute;khat&aacute;sok h&aacute;tter&eacute;ben.</p>.

Keywords: BDNF; ciprofloxacin; motivation; psychomotor; rat.

MeSH terms

  • Animals
  • Brain-Derived Neurotrophic Factor* / genetics
  • Brain-Derived Neurotrophic Factor* / metabolism
  • Brain-Derived Neurotrophic Factor* / pharmacology
  • Ciprofloxacin* / adverse effects
  • Ciprofloxacin* / metabolism
  • Hippocampus / metabolism
  • Humans
  • Learning
  • RNA, Messenger / metabolism
  • RNA, Messenger / pharmacology
  • Rats
  • Reflex, Startle / physiology

Substances

  • Brain-Derived Neurotrophic Factor
  • Ciprofloxacin
  • RNA, Messenger