Chronic Cannabis Use and Circulating Biomarkers of Neural Health, Stress, and Inflammation in Physically Active Individuals.
Appl Physiol Nutr Metab. 2019 Jul 18;:
Authors: Lisano JK, Kisiolek JN, Smoak P, Phillips KT, Stewart LK
Previous research has associated cannabis use with altered circulating neurotrophins and biomarkers of immune health, but these relationships have yet to be fully explored in physically active individuals. The specific aim of this study was to explore the relationships between biomarkers of neural health: nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF), immune health: interleukin 6 (IL-6), c-reactive protein (CRP), and cortisol, as well as the presence of depression, in physically active cannabis users (CU) and non-users (NU). Male and female participants (N=30; CU n=15, NU n=15) provided intravenous blood samples and underwent assessment of body composition, V̇O2max, and depression (Beck Depression Inventory-II (BDI-II)). Samples were analyzed for concentrations of NGF, BDNF, IL-6, CRP, and cortisol using ELISAs. CU and NU were compared using an unpaired t-test. Pearson’s correlation and multiple linear regression were used to evaluate relationships amoung variables. There were no significant differences in body size or composition, V̇O2max, total BDI-II Score, concentrations of NGF, IL-6, CRP, or cortisol between groups. BDNF was significantly lower in CU compared to NU (p=0.02), with a significant negative relationship between BDNF and CRP (p=0.02). Mean concentrations of CRP placed CU at higher risk for cardiovascular disease compared to NU. Total BDI-II score negatively correlated with BDNF (p=0.02) and positively correlated with CRP (p=0.02). • Plasma BDNF was significantly lower in physically active cannabis users compared to non-users. • Cannabis users were classified at moderate risk for CVD based on average circulating CRP compared to low risk for non-users.
PMID: 31319037 [PubMed – as supplied by publisher]
Source: ncbi 2