Medical cannabis and cannabinoids in rheumatology: where are we now?

Clinicians involved in pain management can finally include cannabis or cannabis-related products in their therapeutic armamentarium as a growing number of countries have approved them for pain relief. The growing public opinion, pushing toward the legalization of the use of cannabis in chronic pain and various rheumatological conditions, makes it necessary to have educational programs that modify the concerns and widespread preconceptions related to this topic in the medical community by increasing confidence.

Cannabinoids for the treatment of rheumatic diseases – where do we stand?

As medical use of cannabis is increasingly legalized worldwide, a better understanding of the medical and hazardous effects of this drug is imperative. The pain associated with rheumatic diseases is considered a prevalent indication for medicinal cannabis in various countries. The potential medicinal effects of cannabis could be attributable to its influence on the immune system, as it exerts an immunomodulatory effect on various immune cells, including T cells, B cells and macrophages.

Cannabis, pain, and sleep: lessons from therapeutic clinical trials of Sativex, a cannabis-based medicine

Cannabis sativa L. has been utilized for treatment of pain and sleep disorders since ancient times. This review examines modern studies on effects of Delta9-tetrahydrocannabinol (THC) and cannabidiol (CBD) on sleep. No tolerance to the benefit of Sativex on pain or sleep, nor need for dosage increases have been noted in safety extension studies of up to four years, wherein 40-50% of subjects attained good or very good sleep quality, a key source of disability in chronic pain syndromes that may contribute to patients’ quality of life.

Joints for joints: cannabinoids in the treatment of rheumatoid arthritis

An increasing number of patients with rheumatoid arthritis (RA) are using cannabis to treat their symptoms, although systematic studies regarding efficacy in RA are lacking. Within this review we will give an overview on the overall effects of cannabinoids in inflammation and why they might be useful in the treatment of RA. Peripherally, cannabinoids show anti-inflammatory effects by activating cannabinoid type 2 receptors (CB2) which decrease cytokine production and immune cell mobilization.

[MEDICAL CANNABIS – A SOURCE FOR A NEW TREATMENT FOR AUTOIMMUNE DISEASE?]

Medical uses of Cannabis sativa have been known for over 6,000 years. Nowadays, cannabis is mostly known for its psychotropic effects and its ability to relieve pain, even though there is evidence of cannabis use for autoimmune diseases like rheumatoid arthritis centuries ago. In order to examine this subject we will focus on some major autoimmune diseases such as diabetes type I and rheumatoid arthritis.

The endocannabinoid system and its therapeutic implications in rheumatoid arthritis

Since the discovery of the endogenous receptor for Δ(9)-tetrahydrocannabinol, a main constituent of marijuana, the endocannabinoid system (comprising cannabinoid receptors and their endogenous ligands, as well as the enzymes involved in their metabolic processes) has been implicated as having multiple regulatory functions in many central and peripheral conditions, including rheumatoid arthritis (RA). In this review, we will discuss the possible functions of the endocannabinoid system in the modulation of RA, which may be a potential target for treatment.

Cannabinoid receptor 2 as a potential therapeutic target in rheumatoid arthritis

Some of cannabinoids, which are chemical compounds contained in marijuana, are immunosuppressive. One of the receptors, CB receptor 1 (CB1), is expressed predominantly by the cells in the central nervous system, whereas CB receptor 2 (CB(2)) is expressed primarily by immune cells. Theoretically, selective CB(2) agonists should be devoid of psychoactive effects. In this study, we investigated therapeutic effects of a selective CB(2) agonist on arthritis. The present study suggests that a selective CB(2) agonist could be a new therapy for RA that inhibits production of inflammatory mediators from FLS, and osteoclastogenesis.