Category Archives: HIV/AIDS

Medical Cannabis Treatment for Cancer and HIV/AIDS ?

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“Benefits of Medical Cannabis”

medical marijuana

“Today, there are at least 17 states, including the District of Colombia, where cannabis is legal. Ohio, South Carolina, Colorado, New Jersey, California, and Michigan are just a few states that garnered strong support in the legalization of  medical cannabis. In Illinois, a bill legalizing the use of  cannabis needed the signature of Gov Pat Quinn. The legislation was approved by House and Senate, permitting doctors to prescribe cannabis for cancer and patients with HIV/AIDS and other diseases…

There is now quantifiable evidence that cannabis is beneficial in treating many disorders…

Moreover, the Medical Cannabis Research and the University of California found out that cannabis can treat HIV/AIDS and multiple sclerosis symptoms. It can even benefit cancer patients to mitigate the unpleasant side effects of chemotherapy or as an alternative treatment for cervical cancer, breast cancer, prostate cancer, lung cancer, colorectal cancer, brain cancer, and leukemia.”

More: http://guardianlv.com/2013/05/medical-cannabis-treatment-for-cancer-and-hivaids/

The endocannabinoid system and its therapeutic exploitation.

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Image result for Nat Rev Drug Discov.

“The term ‘endocannabinoid’ – originally coined in the mid-1990s after the discovery of membrane receptors for the psychoactive principle in Cannabis, Delta9-tetrahydrocannabinol and their endogenous ligands – now indicates a whole signalling system that comprises cannabinoid receptors, endogenous ligands and enzymes for ligand biosynthesis and inactivation. This system seems to be involved in an ever-increasing number of pathological conditions. With novel products already being aimed at the pharmaceutical market little more than a decade since the discovery of cannabinoid receptors, the endocannabinoid system seems to hold even more promise for the future development of therapeutic drugs. We explore the conditions under which the potential of targeting the endocannabinoid system might be realized in the years to come.”  http://www.ncbi.nlm.nih.gov/pubmed/15340387

http://www.nature.com/nrd/journal/v3/n9/full/nrd1495.html

Marijuana might be able to treat your terrible case of the runs – MSN

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“Seems there’s no end to the list of maladies medical marijuana can’t treat.”

Close-up of Marijuana Plant (© Adam Weiss/Getty Images) 

“The latest: diarrhea, the awful affliction that sounds like “dire rear” for a reason. According to the pot aficionados behind The Weed Blog (who mightn’t be the most unbiased sources on the matter), cannabis-derived products have been used to treat diarrhea in India since at least the late 1800s. These products reportedly cause diarrhea and its symptoms to subside, and — surprise, surprise — help patients regain their appetites. Around 3.5 million people die from diarrhea and its nasty effects every year, so these alleged benefits of pot aren’t just useful to stoners who could fake the runs to score a medical marijuana prescription.”
 

Medical cannabis: the opportunity versus the temptation.

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“The cannabis plant has been known to humanity for centuries as a remedy for pain, diarrhea, and inflammation. Current research has shown cannabis to be a useful remedy for many diseases, including multiple sclerosis, dystonia, and chronic pain.

 Cannabinoids are used to improve food intake in anorexia of AIDS patients and to prevent vomiting due to cancer chemotherapy. In inflammatory conditions cannabinoids improve pain in rheumatoid arthritis and pain and diarrhea in Crohn’s disease. Cannabinoids reduce the size of brain infarct and cardiac reperfusion injury. However, cannabinoid treatment is not free of side effects including euphoria, psychosis, anxiety, paranoia, dependence and abuse.

Since the cannabinoid system is involved in many physiological and pathological processes, the therapeutic potential is great. We must not be blind to the opportunity offered to us by medical cannabis just because it is an illicit drug, nor should we be temped by the quick response of patients to the central effect of cannabis. More research is warranted to explore the full potential of cannabis as medicine.”

http://www.ncbi.nlm.nih.gov/pubmed/22352284

Study: THC Not Cancer-Causing

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“A federal study completed more than two years ago reportedly found that marijuana’s main ingredient did not cause cancer in laboratory animals. A 126-page report on the $2 million study has not been published, although expert reviewers found in June 1994 that the scientific methods used and the conclusions reached were sound, The Boston Globe reported today.

The findings go against the contention of some federal officials that marijuana is carcinogenic. The study will likely add grist to the debate over using marijuana for medical treatment.

A spokesman for White House drug policy adviser Barry R. McCaffrey said his office was not aware of the study.

The Globe said the National Toxicology Program study was revealed earlier this month in a newsletter called AIDS Treatment News.

According to the probe, high doses of the main active ingredient in marijuana, _ tetrahydrocannabinol, or THC _ were put directly into the stomachs of mice and rats daily for two years.

“We found absolutely no evidence of cancer,” said John Bucher, deputy director of the National Toxicology Program.

Because the animals were not exposed to marijuana smoke, the potential of inhaled marijuana to cause cancer was not looked at.

The study was overseen by the Federal Drug Administration, the National Cancer Institute and other federal agencies.

Bucher said publication of the report was overdue, but his agency had not been pressured to bury it. A personnel shortage caused the delay, he said.

The New England Journal of Medicine has come out in favor of allowing doctors to prescribe marijuana for medical purposes.

Some doctors believe marijuana can relieve internal eye pressure in glaucoma, control nausea in cancer patients on chemotherapy and combat the severe weight loss seen in AIDS patients.

However, Clinton administration officials note that such uses of marijuana have not been proved.”

Associated Press, Jan 30, 1997 BOSTON

http://www.ukcia.org/research/cancer.php

Cannabinoid Receptor 2-Mediated Attenuation of CXCR4-Tropic HIV Infection in Primary CD4+ T Cells

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“Agents that activate cannabinoid receptor pathways have been tested as treatments for cachexia, nausea or neuropathic pain in HIV-1/AIDS patients… Cannabinoid agonists activate the CB1R and CB2R cannabinoid receptors…

Cannabinoid agonists are currently under investigation for the treatment of AIDS-associated cachexia, nausea, and neuropathic pain. One such drug, dronabinol (Δ9-THC; Marinol®), has won Food and Drug Administration (FDA) approval for treatment of HIV-associated anorexia. Additionally, the prescription of smoked or ingested cannabis (marijuana) for treatment of AIDS-related symptoms has been approved…. Despite the use of cannabinoids by HIV/AIDS patients, few studies have investigated the impact of such drugs in regard to viral pathogenesis or immune regulation…

….Indeed, both smoked marijuana and dronabinol were reported to increase total CD4+ T cell number and naïve T cell number over a 21-day period. A decrease in viral load was also observed in these patients. Similarly, in SIV infected rhesus macaques, Δ9-THC exposure reduced viral load and CD4+ T cell depletion, significantly increasing animal survival over an 11 month period.

. Our findings suggest that CB2R activation in CD4+ T cells can inhibit actin reorganization and impair productive infection following cell-free or cell-associated viral acquisition of CXCR4-tropic HIV-1 in resting cells.

Therefore, the clinical use of CB2R agonists in the treatment of AIDS symptoms may also exert beneficial adjunctive antiviral effects against CXCR4-tropic viruses in late stages of HIV-1 infection.

Further study of cannabinoids and other neuroendocrine regulators that selectively modulate immune function may result in the discovery of new anti-viral drugs that can also mitigate AIDS-associated symptoms.”

Full text: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3309010/

Cannabinoid Inhibition of Macrophage Migration to the Trans-Activating (Tat) Protein of HIV-1 Is Linked to the CB2 Cannabinoid Receptor

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“Macrophage-like cells are primary targets for infection by HIV-1…  In the present study, the exogenous cannabinoids δ-9-tetrahydrocannabinol (THC) and (−)-cis-3-[2-hydroxy-4-(1,1-dimethylheptyl)phenyl]-trans-4-(3-hydroxypropyl) cyclohexanol (CP55940) were shown to significantly inhibit migration of human U937 macrophage-like cells to the Tat protein in a concentration-related manner….

Collectively, the pharmacological and biochemical knockdown data indicate that cannabinoid-mediated modulation of macrophage migration to the HIV-1 Tat protein is linked to the CB2 cannabinoid receptor. Furthermore, these results suggest that the CB2 cannabinoid receptor has potential to serve as a therapeutic target for ablation of HIV-1-associated untoward inflammatory response…

,,, the CB2 receptor has the potential to serve as a molecular target for ablating hyperinflammatory responses of macrophage-like cells while avoiding untoward psychotropic effects caused by activation of the CB1 receptor.

 In conclusion, the immunosuppressive and anti-inflammatory properties of select cannabinoids may have profound therapeutic potential in moderating HIV-associated immunopathology, including microglial activation, chemokine/cytokine dysregulation, and monocyte infiltration in the CNS.”

Full text: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2846023/

Attenuation of HIV-1 replication in macrophages by cannabinoid receptor 2 agonists.

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“Previous studies showed that activation of the CB2 can attenuate inflammatory responses and affect HIV-1 infectivity in T cells and microglia. Here, we report that CB2 agonists can also act as immunomodulators on HIV-1-infected macrophages.

   We speculate that these findings indicate that prevention of viral entry is not a central mechanism for CB2-mediated suppression in viral replication.

However, CB2 may affect the HIV-1 replication machinery.

Results from a single-round infection with the pseudotyped virus revealed a marked decrease in HIV-1 LTR activation by the CB2 ligands.

Together, these results indicate that CB2 may offer a means to limit HIV-1 infection in macrophages.”

http://www.ncbi.nlm.nih.gov/pubmed/23463725

The pharmacologic and clinical effects of medical cannabis.

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“Cannabis, or marijuana, has been used for medicinal purposes for many years. Several types of cannabinoid medicines are available in the United States and Canada. Dronabinol (schedule III), nabilone (schedule II), and nabiximols (not U.S. Food and Drug Administration approved) are cannabis-derived pharmaceuticals.

Medical cannabis or medical marijuana, a leafy plant cultivated for the production of its leaves and flowering tops, is a schedule I drug, but patients obtain it through cannabis dispensaries and statewide programs. The effect that cannabinoid compounds have on the cannabinoid receptors (CB(1) and CB(2) ) found in the brain can create varying pharmacologic responses based on formulation and patient characteristics. The cannabinoid Δ(9) -tetrahydrocannabinol has been determined to have the primary psychoactive effects; the effects of several other key cannabinoid compounds have yet to be fully elucidated. Dronabinol and nabilone are indicated for the treatment of nausea and vomiting associated with cancer chemotherapy and of anorexia associated with weight loss in patients with acquired immune deficiency syndrome. However, pain and muscle spasms are the most common reasons that medical cannabis is being recommended.

Studies of medical cannabis show significant improvement in various types of pain and muscle spasticity. Reported adverse effects are typically not serious, with the most common being dizziness. Safety concerns regarding cannabis include the increased risk of developing schizophrenia with adolescent use, impairments in memory and cognition, accidental pediatric ingestions, and lack of safety packaging for medical cannabis formulations. This article will describe the pharmacology of cannabis, effects of various dosage formulations, therapeutics benefits and risks of cannabis for pain and muscle spasm, and safety concerns of medical cannabis use.”

http://www.ncbi.nlm.nih.gov/pubmed/23386598

Cannabidiol Inhibits Growth and Induces Programmed Cell Death in Kaposi Sarcoma–Associated Herpesvirus-Infected Endothelium

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“Kaposi sarcoma is the most common neoplasm caused by Kaposi sarcoma–associated herpesvirus (KSHV). Current treatments for Kaposi sarcoma can inhibit tumor growth but are not able to eliminate KSHV from the host. When the host’s immune system weakens, KSHV begins to replicate again, and active tumor growth ensues. New therapeutic approaches are needed.

Cannabidiol (CBD), a plant-derived cannabinoid, exhibits promising antitumor effects without inducing psychoactive side effects. CBD is emerging as a novel therapeutic for various disorders, including cancer.

In this study, we investigated the effects of CBD both on the infection of endothelial cells (ECs) by KSHV and on the growth and apoptosis of KSHV-infected ECs, an in vitro model for the transformation of normal endothelium to Kaposi sarcoma….

Cannabidiol (CBD) was first isolated in 1940. It is a major component of the plant Cannabis sativa, which is also the source of Δ9-tetrahydrocannabinol (Δ9-THC). Due to its multiple biological activities, CBD has been identified as a potential clinical agent. Moreover, CBD affects these activities without the psychoactive side effects that typify Δ9-THC. Recent studies have documented the potential antitumorigenic properties of CBD in the treatment of various neoplasms, including breast cancer, lung cancer, bladder cancer, glioblastoma,and leukemia.CBD induces these effects through a variety of mechanisms and signaling pathways

CBD has been evaluated clinically for the treatment of various conditions, including anxiety, psychosis, and pain. In contrast to other members of the cannabinoid family, CBD has a strong safety profile and induces no psychotropic effects.Therefore, it has become an attractive agent in the search for new anticancer therapies.Our current study demonstrated that CBD preferentially enhanced apoptosis and inhibited the proliferation of KSHV-infected endothelial cells. This selective targeting of KSHV-induced neoplasia suggests that CBD may have a desirable therapeutic index when used to treat cancer. Moreover, a recent study demonstrated that CBD can be delivered effectively by nasal and transdermal routes, which may be particularly valuable for the treatment of Kaposi sarcoma oral or skin lesions.”

Full text: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3527984/