CBD efficacy on nonmotor symptoms of Parkinson Disease anxiety & psychosis


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This is the last section of a review article Managing Psychosis in Parkinson Disease

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Results from preclinical and preliminary studies also suggest that cannabidiol (CBD) has therapeutic potential for nonmotor symptoms of PD.14 The multifaceted mechanism of action as an agonist of 5-HT1A, partial agonist of CB1 and CB2 receptors, and antagonist of the G-protein–coupled receptor GPR55 reverses the iron-induced epigenetic modification of mitochondrial DNA and the reduction of succinate dehydrogenase activity and decreases the levels of the pro-inflammatory cytokines IL-1β, TNF-α, IFN-β, IFN-γ, IL-17, and IL-6—all of which decrease pro-inflammatory mediators resulting in neuroprotective, anxiolytic, and antipsychotic effects.14

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“Several in vitro experiments have demonstrated promising neuro- protective effects of CBD in PD models. In one of these models, using PC12 and SH-SY5Y cells treated with MPP+ [1-methyl-4-phenylpyridinium], CBD increased cell viability, differentiation, and the expression of axonal [GAP-43] and synaptic [synaptophysin and synapsin I] proteins,” Ferreria-Junior and colleagues wrote,15 while acknowledging the paucity of studies that have addressed the biological bases for the purported effects of CBD on PD. “Double-blind, placebo-controlled, randomized trials with larger samples of patients with PD are needed to elucidate the possible effectiveness and mechanisms involved in the therapeutic potential of CBD in this movement disorder. This will also include the putative effects of CBD in preventing L-dopa–induced severe [adverse] effects and preventing PD progression.”

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The endocannabinoid system serves as an important filter of excitatory, inhibitory, and modulatory inputs that act at the midbrain and terminal regions to orchestrate DA neurotransmission by controlling DA cell body firing patterns, terminal release, and effects on postsynaptic sites in the striatum.16 Beneficial effects of CBD administration have been observed prior to or immediately after induction of PD-like symptoms in animal studies, which may suggest a preventive role rather than a therapeutic one.14 In an early open-label pilot study to evaluate the efficacy of CBD on nonmotor symptoms of PD in 6 patients with PDP, psychotic symptoms significantly decreased under CBD treatment, as evaluated by the brief psychiatric rating scale and the Parkinson psychosis questionnaire.17

 

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Psychiatric comorbidities prevalent in the majority of patients with PD are associated with more disease severity, impaired QOL, and increased use of healthcare resources, with longer hospital stays and re-hospitalizations adding to the total cost burden.

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Prostate Cancer – Exercise Cuts Inflammatory Cytokines IL-6 & IL-8, reduces psychological distress


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American Society of Clinical Oncologists (ASCO) in Chicago yesterday report on exercise reducing psychological distress. Whether cancer outcome will be impacted is not yet known and will require study but inflammation may impact cancer progression.

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The usual treatments change metabolism, cause weight gain, “loss of lean muscle mass, change[s] lipids, increase[s] rates of diabetes, and it thins bones.”

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Exercise is even more critical in those undergoing hormone therapies.

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This was a small randomized study for seven weeks.

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Patients receiving usual care experienced a 0.08 log10 increase in pro-inflammatory interleukin-6 production, while patients treated with an exercise program experienced a 0.03 log10 decrease in IL-6 (P<0.05), said Charles Kamen, PhD, research assistant professor at the University of Rochester Medical Center in New York.

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In his oral presentation … Kamen and colleagues observed a similar relationship with another pro-inflammatory cytokine, interleukin-8. In the control patients, the researchers noted a 0.03 log10 increase compared with a 0.04 log10 decrease among the exercise group, Kamen said.

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Using the Profile of Mood States (POMS), the research team determined that psychological distress decreased 5.17 points among the exercise group but increased 2.43 points in the patients who were in the usual control group (P=0.02).

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“This study supports the use of exercise for cancer patients for reducing psychological distress and suggests a potential biological mechanism by which this improvement occurs, namely by reducing systemic inflammation,” Kamen said in his presentation….

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The POMS scores were overall significantly in favor of the exercise group, and the subscales all trended in favor of exercise, except for the anger subscale in which there was virtually no change, Kamen said.

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