Journal
INTERNATIONAL IMMUNOPHARMACOLOGY
Volume 75, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.intimp.2019.105751
Keywords
Cytokines; Inflammation; Macrophages; Methamphetamine; Neutrophils
Categories
Funding
- NYIT COM summer research program
- NYIT COM Academic Scholar program
- National Institute of General Medical Sciences of the US National Institutes of Health (NIH) [1R15GM117501-01A1]
- National Institute on Minority Health and Health Disparities [2G12MD007592]
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Methamphetamine (METH) is a stimulant of the central nervous system (CNS) that causes behavioral changes in users. METH is slowly cleared from brain tissue and its chronic use is neurotoxic. METH also alters the cellular and chemical components of inflammation. However, little is known about the effect of a single intravenous dose of METH followed by bacterial lipopolysaccharide (LPS) injection on cellular infiltration and cytokine release in brain tissue. Using a murine model of acute METH administration and flow cytometry, we found that combination of METH and LPS stimulate the infiltration of macrophages (F4/80(+/-)cells) and neutrophils (Ly-6G(+/-)cells) into the CNS. Histological sections of the brainstem of METH-treated and LPS-challenged C57BL/6 mice demonstrated considerable leukocyte infiltration relative to untreated, LPS, and METH groups. Moreover, rodents treated with LPS alone or combined with METH showed elevated levels of pro-inflammatory cytokines mRNA in brain tissue. Our observations are important because recognizing neuroinflammatory changes after acute METH administration might help us to understand METH-induced neurotoxicity in users.
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