Tag Archives: cancer

Update on the endocannabinoid system as an anticancer target.

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“INTRODUCTION:

Recent studies have shown that the endocannabinoid system (ECS) could offer an attractive antitumor target. Numerous findings suggest the involvement of this system (constituted mainly by cannabinoid receptors, endogenous compounds and the enzymes for their synthesis and degradation) in cancer cell growth in vitro and in vivo.

AREAS COVERED:

This review covers literature from the past decade which highlights the potential of targeting the ECS for cancer treatment. In particular, the levels of endocannabinoids and the expression of their receptors in several types of cancer are discussed, along with the signaling pathways involved in the endocannabinoid antitumor effects. Furthermore, the beneficial and adverse effects of old and novel compounds in clinical use are discussed.

EXPERT OPINION:

One direction that should be pursued in antitumor therapy is to select compounds with reduced psychoactivity. This is known to be connected to the CB1 receptor; thus, targeting the CB2 receptor is a popular objective. CB1 receptors could be maintained as a target to design new compounds, and mixed CB1-CB2 ligands could be effective if they are able to not cross the BBB. Furthermore, targeting the ECS with agents that activate cannabinoid receptors or inhibitors of endogenous degrading systems such as fatty acid amide hydrolase inhibitors may have relevant therapeutic impact on tumor growth. Additional studies into the downstream consequences of endocannabinoid treatment are required and may illuminate other potential therapeutic targets.”  http://www.ncbi.nlm.nih.gov/pubmed/21244344

“Update on the endocannabinoid system as an anticancer target”  http://www.tandfonline.com/doi/abs/10.1517/14728222.2011.553606?journalCode=iett20

Use of cannabinoid receptor agonists in cancer therapy as palliative and curative agents.

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“Cannabinoids (the active components of Cannabis sativa) and their derivatives have received renewed interest in recent years due to their diverse pharmacological activities. In particular, cannabinoids offer potential applications as anti-tumour drugs, based on the ability of some members of this class of compounds to limit cell proliferation and to induce tumour-selective cell death. Although synthetic cannabinoids may have pro-tumour effects in vivo due to their immunosuppressive properties, predominantly inhibitory effects on tumour growth and migration, angiogenesis, metastasis, and also inflammation have been described. Emerging evidence suggests that agonists of cannabinoid receptors expressed by tumour cells may offer a novel strategy to treat cancer. In this chapter we review the more recent results generating interest in the field of cannabinoids and cancer, and provide novel suggestions for the development, exploration and use of cannabinoid agonists for cancer therapy, not only as palliative but also as curative drugs.” https://www.ncbi.nlm.nih.gov/pubmed/19285265

“Use of cannabinoid receptor agonists in cancer therapy as palliative and curative agents” http://www.bprcem.com/article/S1521-690X(09)00005-0/abstract

Cannabis-derived substances in cancer therapy–an emerging anti-inflammatory role for the cannabinoids.

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“Cannabinoids, the active components of the cannabis plant, have some clinical merit both as an anti-emetic and appetite stimulant in cachexic patients. Recently, interest in developing cannabinoids as therapies has increased following reports that they possess anti-tumour properties.

 Research into cannabinoids as anti-cancer agents is in its infancy, and has mainly focussed on the pro-apoptotic effects of this class of agent. Impressive anti-cancer activities have been reported; actions that are mediated in large part by disruptions to ubiquitous signalling pathways such as ERK and PI3-K. However, recent developments have highlighted a putative role for cannabinoids as anti-inflammatory agents. Chronic inflammation has been associated with neoplasia for sometime, and as a consequence, reducing inflammation as a way of impacting cancer presents a new role for these compounds.

 This article reviews the ever-changing relationship between cannabinoids and cancer, and updates our understanding of this class of agent. Furthermore, the relationship between chronic inflammation and cancer, and how cannabinoids can impact this relationship will be described.”

http://www.ncbi.nlm.nih.gov/pubmed/20925645

Established and potential therapeutic applications of cannabinoids in oncology.

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Abstract

“Cannabis occurs naturally in the dried flowering or fruiting tops of the Cannabis sativa plant. Cannabis is most often consumed by smoking marihuana. Cannabinoids are the active compounds extracted from cannabis. Recently, there has been renewed interest in cannabinoids for medicinal purposes. The two proven indications for the use of the synthetic cannabinoid (dronabinol) are chemotherapy-induced nausea and vomiting and AIDS-related anorexia. Other possible effects that may prove beneficial in the oncology population include analgesia, antitumor effect, mood elevation, muscle relaxation, and relief of insomnia. Two types of cannabinoid receptors, CB1 and CB2, have been detected. CB1 receptors are expressed mainly in the central and peripheral nervous system. CB2 receptors are found in certain nonneuronal tissues, particularly in the immune cells. Recent discovery of both the cannabinoid receptors and endocannabinoids has opened a new era in research on the pharmaceutical applications of cannabinoids. The use of cannabinoids should be continued in the areas indicated, and further studies are needed to evaluate other potential uses in clinical oncology.”

http://www.ncbi.nlm.nih.gov/pubmed/12618922

Cannabinoid receptor ligands as potential anticancer agents–high hopes for new therapies?

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“OBJECTIVES:

The endocannabinoid system is an endogenous lipid signalling network comprising arachidonic-acid-derived ligands, cannabinoid (CB) receptors, transporters and endocannabinoid degrading enzymes. The CB(1) receptor is predominantly expressed in neurons but is also co-expressed with the CB(2) receptor in peripheral tissues. In recent years, CB receptor ligands, including Delta(9)-tetrahydrocannabinol, have been proposed as potential anticancer agents.

KEY FINDINGS:

This review critically discusses the pharmacology of CB receptor activation as a novel therapeutic anticancer strategy in terms of ligand selectivity, tissue specificity and potency. Intriguingly, antitumour effects mediated by cannabinoids are not confined to inhibition of cancer cell proliferation; cannabinoids also reduce angiogenesis, cell migration and metastasis, inhibit carcinogenesis and attenuate inflammatory processes. In the last decade several new selective CB(1) and CB(2) receptor agents have been described, but most studies in the area of cancer research have used non-selective CB ligands. Moreover, many of these ligands exert prominent CB receptor-independent pharmacological effects, such as activation of the G-protein-coupled receptor GPR55, peroxisome proliferator-activated receptor gamma and the transient receptor potential vanilloid channels.

SUMMARY:

The role of the endocannabinoid system in tumourigenesis is still poorly understood and the molecular mechanisms of cannabinoid anticancer action need to be elucidated. The development of CB(2)-selective anticancer agents could be advantageous in light of the unwanted central effects exerted by CB(1) receptor ligands. Probably the most interesting question is whether cannabinoids could be useful in chemoprevention or in combination with established chemotherapeutic agents.”

http://www.ncbi.nlm.nih.gov/pubmed/19589225

Cannabinoids: potential anticancer agents.

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Abstract

“Cannabinoids – the active components of Cannabis sativa and their derivatives – exert palliative effects in cancer patients by preventing nausea, vomiting and pain and by stimulating appetite. In addition, these compounds have been shown to inhibit the growth of tumour cells in culture and animal models by modulating key cell-signalling pathways. Cannabinoids are usually well tolerated, and do not produce the generalized toxic effects of conventional chemotherapies. So, could cannabinoids be used to develop new anticancer therapies?”

http://www.ncbi.nlm.nih.gov/pubmed/14570037

 

Therapeutic potential of cannabinoid receptor ligands: current status.

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Abstract

“There are at least two types of cannabinoid receptors, CB1 also named CNR1 and CB2 also named CNR2, both coupled to G proteins. CB1 receptors exist primarily on central and peripheral neurons. CB2 receptors are present mainly on immune cells. Endogenous agonists for cannabinoid receptors (endocannabinoids) have also been discovered, the most important being arachidonoyl ethanolamide (anandamide), 2-arachidonoyl glycerol (2-AG), and 2-archidonyl glyceryl ether. Following their release, endocannabinoids are removed from the extracellular space and then degraded by intracellular enzymic hydrolysis. CB1/CB2 agonists are already used clinically as antiemetic or to stimulate appetite. Potential therapeutic uses of cannabinoid receptor agonists include the management of multiple sclerosis, spinal cord injury, pain, inflammatory disorders, glaucoma, bronchial asthma, vasodilatation that accompanies advanced cirrhosis, and cancer.”

http://www.ncbi.nlm.nih.gov/pubmed/16810344

Cannabis Cures Cancer

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“I’m a cancer patient. I use an experimental chemotherapy that is an extraction of the cannabis plant. I don’t use it to feel good. I use it for the purpose of killing the cancer.

Right now, there are about fifty people making this experimental chemotherapy in the state of Michigan. As a result of the opinion issued by the attorney general, the number of people willing to create this substance may now be reduced to two or three. All are working at a fevered pace trying to keep patients alive. The clock is ticking. Most of the time we have one single chance to get it right. Most of the patients we deal with will die before we get a second try.

It takes about one pound of the highest quality cannabis flowers to make enough of this extract for one single procedure, for one single patient. This extract is eaten by the patient within sixty to 90 days. This is a much higher dose that normally used to get “high.”

The procedure cannot be stopped and restarted. It is used in a way that is similar to antibiotics. You can’t stop and start antibiotics. If you do, the infection gets stronger and more difficult to get rid of. The same seems to hold true for cancer. You simply can’t play the hit and miss game with cancer. If you are on target, it MUST be completed. What is required, to stay alive, is an uninterrupted supply of the medicine. Enough to last through the entire 90 day procedure.

It is very difficult to find enough material for a single patient. Within the community we have been begging for scraps for the last two years. Begging over and over again just to supply the needs for one single patient. So we work with left over trimmings that normally would have been burned or buried. Material that no one would want. Thieves that break into our growing areas would ignore the scrap. They view it as worthless.

This useless material has had negative impact on many court cases in this state. By law, if you forget to burn some scrap, it gets counted toward the limit of 2.5 ounces. Most of us are attempting to avoid that extra scrap excess. We burn and bury any hint of excess material as quickly as possible. If we’re caught trying to do so it could well mean a felony conviction. If we delay by just a few hours we could be arrested and convicted.

Those that have been already growing marijuana and receive fresh news that they have cancer are the lucky ones. The just might have the material needed to stay alive. Might. It depends on if they have been successful in growing, if they’ve avoided fungus and insect attacks long enough to produce usable material. If they’ve learned the right nutrient combinations to apply to their indoor growing plants that afford the maximum yield.

If the patient has luck after luck, they are then at a place they can attempt to make this extract for themselves.

For a very long time, there have been many studies that show the compounds in cannabis kill cancer cells. These studies first started reporting this effect in 1974. Hundreds, if not thousands, of such scientific studies have been published but our government and most other governments of the world have refused to allow testing in humans, with very few exceptions.  Only one or two such studies have been allowed. Not one single human study has been allowed in the US in the last seventy years. Without human testing, our government relies on the statement “this hasn’t been proven in human testing,” which is technically correct because such testing isn’t allowed.

The voters of Michigan have told the government that it is acceptable to use this plant for medical purposes. It’s time for those officials to obey the voters.

While it is a noble thing to decrease the suffering of someone that is dying, I would rather see these same people survive. Wouldn’t you?

Gersh Avery is Cofounder of the Cannabis Cancer Project. He lives in Dexter.”

http://themidwestcultivator.com/marijuana-news-editorial/02-2012/cannabis-cures-cancer

Is The NFL’s Campaign For Breast Cancer Awareness Really A Scam?

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“October is breast cancer awareness month, and with that, the NFL has decided to pitch in to raise both money and awareness for breast cancer research.

But how much of that money is actually going to find a cure for breast cancer? According to a report, not very much.

Every October, NFL teams sport pink shoes, gloves, towels, hats and shirts, all designed to raise money and awareness. The NFL’s fundraising effort is multifaceted: There’s the off-field auction of autographed NFL paraphernalia and there’s the NFL online store that entices shoppers to purchase officially licensed NFL breast cancer gear.

A report from Business Insider revealed that 5% of purchases of officially licensed gear go back to the American Cancer Society. The rest of the cash goes directly into the NFL’s pockets.

Through four seasons of this pink initiative, the NFL has raised just $3 million for breast cancer research. To put that into perspective, the NFL made $9.5 billion last year.”

http://chicago.cbslocal.com/2012/10/11/is-the-nfls-campaign-against-breast-cancer-really-a-scam/

The NFL’s Campaign Against Breast Cancer Is a Total Scam

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The NFL's Campaign Against Breast Cancer Is a Total Scam“Have you noticed that during the month of October, the NFL suddenly becomes intensely concerned with making sure you’re aware of breast cancer? Pink jerseys! Huge Ass Pink Ribbons at midfield! Pink motherfucking cleats! Fans interested in aware-ing on their own can even click on over to the NFL’s store and purchase ugly pink crap of their own under the assumption that their good intentions will actually contribute to the fight against cancer. Well, I hate to burst your Pepto Bismo Pink bubble, wearers of dangly earrings that contain both ribbons and tiny footballs, but you’ve been had — the NFL’s Breast Cancer Awareness Month campaign does raise itsy bitsy amounts of money for the fight against cancer, but the amount of money it raises pales in comparison to the amount of money it raises for billionaire NFL owners.

The NFL claims that its pink philanthropy efforts “support the fight against breast cancer” by “promoting awareness” and providing funds to the American Cancer Society. But what they’re mostly promoting is, uh, buying NFL gear, the profits from which are overwhelmingly pocketed by the NFL.

According to Business Insider, the NFL’s October Breast Cancer Awareness Month fundraising effort is multi-pronged. There’s the on-field onslaught of pink (AWARENESS), the off-field auction of autographed or otherwise noteworthy NFL paraphernalia (MONEY FOR THE CURE!), and the part of the NFL store that entices shoppers to purchase officially licensed NFL breast cancer gear, a portion of which goes to FINDING A CURE. According to the League, 100% of the proceeds from the specialty auction go to the American Cancer Society, but the total percentage of purchases of officially licensed gear that actually goes to FINDING A CURE is actually kind of pathetic — 5%. If you want to look at this cynically, in a way, the on-field wearin’ o’ the pink serves as an ad to direct consumers to purchase pink fan items.

BUT WAIT, you might say, AT LEAST THEY’RE DOING SOMETHING. And 5% is still something! Well, kind of. As BI pointed out, if NFL products are sold at a 100% markup and only 5% of sale proceeds go to the American Cancer Society, then the NFL is pocketing 90% of sales of Breast Cancer Awareness products, many of which would not be purchased if they didn’t come with a promise that consumers were “helping.” And, more perspective: while the American Cancer Society isn’t, say, Komen, they still don’t use 100% of the money they receive to “fight” breast cancer. Only 70% of donations taken in by the organization go toward cancer research. So, if you spend $10 on pink stink from the NFL, only about 35 cents is going to finding a cure for breast cancer. And $4.50 goes right back to the NFL, where I like to imagine that it’s spent on gas for a Lake Minnetonka pleasure cruise. For the cure.

But what about awareness?! Surely the NFL is helping keep people aware and alert and vigilant that at any moment, breast cancer could be lurking around a corner in a dark alley waiting with a hot pink switchblade to steal your purse and boobs. The thing about awareness is that it’s all but impossible to quantify — and everyone knows about breast cancer. If you asked 100 people if they’re aware that breast cancer is a thing and that it’s almost impossible to predict and most often affects women, I’d bet that most of them would nod before slowly backing away from you. Breast cancer awareness is so ubiquitous that if deadly diseases attended the same high school, breast cancer would probably be voted prom queen. The “awareness” that comes from the NFL’s sales of pink branded items doesn’t justify the extent to which the league is taking advantage of consumers’ good intentions to pad their wallets. Even if no NFL player ever touched another pink thing again, Americans would go right on being aware of the disease. Unless the Buffalo Jills or New Orleans Saintsations cheerleaders are holding up signs that show women how to give themselves breast self-exams or tickets come with 5 page printouts of places low income women can obtain breast health screening for low or no cost, the type of awareness the NFL is providing is useless, vague garbage.

Since the program’s inception four years ago, the NFL has raised $3 million for breast cancer. In 2009, the League made $8.5 billion. Last year, they made $9.5 billion. Commissioner Roger Goodell has set a revenue goal of $25 billion per year by the year 2027. A million per year out of between $8.5 and $9.5 billion in revenues? Pardon me while I don’t slobber all over the NFL’s pink-drenched marketing campaign.

Want to cure breast cancer? Give directly to an organization that cures breast cancer, or to an advocacy group that seeks actual cures, not marketing and corporate profits. Besides, wearing those horrid pink NFL breast cancer rain boots actually causes cancer. Of the eyes.”

http://jezebel.com/5950971/the-nfls-campaign-against-breast-cancer-is-a-total-scam