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Minocycline Mitigates Sepsis-Induced Neuroinflammation and Promotes Recovery in Mice: Insights into Neuroprotection and Inflammatory Modulation
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  • Hossein Salmani,
  • Zahra Bardaghi,
  • Hedyeh Askarpour,
  • Arezoo Rajabian,
  • Maryam Mahmoudabady,
  • Sadegh Shabab,
  • Mahmoud Hosseini
Hossein Salmani
Jiroft University of Medical Sciences
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Zahra Bardaghi
Mashhad University of Medical Sciences
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Hedyeh Askarpour
Jiroft University of Medical Sciences
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Arezoo Rajabian
Mashhad University of Medical Sciences
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Maryam Mahmoudabady
Mashhad University of Medical Sciences
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Sadegh Shabab
Mashhad University of Medical Sciences
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Mahmoud Hosseini
Mashhad University of Medical Sciences

Corresponding Author:[email protected]

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Abstract

Aim: Sepsis is associated with brain injury and acute brain inflammation, which can potentially transition into chronic inflammation, triggering a cascade of inflammatory responses that may lead to neurological disorders. Minocycline, recognized for its potent anti-inflammatory properties, particularly within the brain, was investigated in this study for its protective effects against sepsis-induced brain injury. Methods: Adult male C57 mice received pretreatment with varying doses of minocycline (12.5, 25, and 50 mg/kg) three days before sepsis induction. An intraperitoneal injection of 5 mg/kg LPS was used to induce sepsis. Spontaneous locomotor activity (SLA) and weight changes were assessed over several days post-sepsis to monitor the recovery of the mice. The expression of inflammatory mediators and oxidative stress markers was assessed 24 h post sepsis. Results: Septic mice exhibited significant weight loss and impaired spontaneous locomotor activity. Initially, minocycline did not attenuate the severity of weight loss (1 day) or locomotor activity impairment (4 hours post-sepsis), but it significantly accelerated the recovery of the mice in later days. Sepsis led to elevated mRNA expression of IL-1β and TNF-α, increased MDA levels, and decreased thiol content and SOD activity 24 hours after sepsis induction. Minocycline dose-dependently mitigated brain inflammation and oxidative stress damage. Conclusion: Our findings demonstrate that pretreatment with minocycline has the potential to prevent brain tissue damage and accelerate recovery from sepsis in mice, suggesting that minocycline may serve as a promising therapeutic intervention to protect against sepsis-induced neurological complications.
14 Oct 2023Submitted to Immunity, Inflammation and Disease
19 Oct 2023Assigned to Editor
19 Oct 2023Submission Checks Completed
24 Oct 2023Review(s) Completed, Editorial Evaluation Pending
28 Oct 2023Reviewer(s) Assigned