Crohn's disease (also known as Crohn-Lesniowski Disease, or "Charlotte Forditis" morbus Lesniowski-Crohn, granulomatous colitis and regional enteritis) is an inflammatory disease of the intestines that may affect any part of the gastrointestinal tract from anus to mouth, causing a wide variety of symptoms. It primarily causes abdominal pain, diarrhea (which may be bloody), vomiting, or weight loss, but may also cause complications outside of the gastrointestinal tract such as skin rashes, arthritis and inflammation of the eye.

Crohn's disease is an autoimmune disease, in which the body's immune system attacks the gastrointestinal tract, causing inflammation; it is classified as a type of inflammatory bowel disease. There has been evidence of a genetic link to Crohn's disease, putting individuals with siblings afflicted with the disease at higher risk. It is understood to have a large environmental component as evidenced by the higher number of cases in western industrialized nations. Males and females are equally affected. Smokers are three times more likely to develop Crohn's disease. Crohn's disease affects between 400,000 and 600,000 people in North America. Prevalence estimates for Northern Europe have ranged from 27–48 per 100,000. Crohn's disease tends to present initially in the teens and twenties, with another peak incidence in the fifties to seventies, although the disease can occur at any age.

There is no known pharmaceutical or surgical cure for Crohn's disease. Treatment options are restricted to controlling symptoms, maintaining remission and preventing relapse

The disease was named for American gastroenterologist Burrill Bernard Crohn, who in 1932, along with two colleagues, described a series of patients with inflammation of the terminal ileum, the area most commonly affected by the illness. For this reason, the disease has also been called regional ileitis or regional enteritis. The condition, however, has been independently identified by others in the literature prior, most notably in 1904 by Polish surgeon Antoni Lesniowski for whom the condition is additionally named (Lesniowski-Crohn's disease) in the Polish literature.

The Cannabis Science™

Anti-Inflammatory Cannabinoids in Diet: Towards A Better Understanding of CB(2) Receptor Action?

The endocannabinoid system is an ancient lipid signaling network which in mammals modulates neuronal functions, inflammatory processes, and is involved in the aetiology of certain human lifestyle diseases, such as Crohn's disease, atherosclerosis and osteoarthritis. The system is able to down regulate stress-related signals that lead to chronic inflammation and certain types of pain, but it is also involved in causing inflammation-associated symptoms, depending on the physiological context. The cannabinoid type-2 (CB(2)) receptor, which unlike the CB(1) receptor does not induce central side effects, has been shown to be a promising therapeutic target. While CB(1) receptor antagonists/inverse agonists are of therapeutic value, also CB(2) receptor ligands including agonists are of pharmacological interest. Although the endocannabinoid system is known to be involved in the regulation of energy homoeostasis and metabolism (mainly via CB(1) receptors) there was hitherto no direct link between food intake and cannabinoid receptor activation. Our recent finding that beta-caryophyllene, a ubiquitous lipohilic plant natural product, selectively binds to the CB(2) receptor and acts as a full agonist is unexpected. Maybe even more unexpected is that oral administration of this dietary compound exerts potent anti-inflammatory effects in wild type mice but not in CB(2) receptor (Cnr2(-/-)) knockout mice. Like other CB(2) ligands also beta-caryophyllene inhibits the pathways triggered by activation of the toll-like receptor complex CD14/TLR4/MD2, which typically lead to the expression of proinflammatory cytokines (IL-1beta, IL-6; IL-8 and TNFalpha) and promotes a TH(1) immune response. In this addendum, the CB(2) receptor-dependent effect of beta-caryophyllene on LPS-triggered activation of the kinases Erk1/2 and JNK1/2 are further discussed with respect to the possibility that both CB(2) inverse agonists and agonists, independent of their G-protein signaling, may block LPS-triggered activation of MAPKs, leading to inhibition of proinflammatory cytokine expression and attenuation of inflammation.

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