If you’re experiencing side effects from prostate cancer treatment, such as weight gain, bone thinning or hot flushes from hormone therapy, bowel problems or urinary problems, making changes to your lifestyle may also help you manage them.
Bill Turnbull’s powerful documentary got plenty of people talking about the various treatment options he tried. One of our expert Clinical Nurse Specialists answers some commonly asked questions.
But these studies have only looked at prostate cancer cells grown in laboratories or in mice. There’s a long way to go in understanding whether there might be similar effects in patients. Cells can behave very differently in humans, so we need clinical trials in humans to see if cannabinoids could be used to treat prostate cancer. We also don’t yet understand the mechanism by which the cannabinoids prevent prostate cancer cells from growing or dividing either.
Q. Can cannabis help cure prostate cancer?
Did you see Bill Turnbull: Staying Alive on Channel 4? It’s a powerful documentary that follows the TV presenter and journalist currently living with advanced prostate cancer as he goes through chemotherapy, tries diets and complementary therapies, and speaks to others with the disease, including Stephen Fry.
Staying a healthy weight may also mean your prostate cancer is less likely to spread after surgery or radiotherapy. And if you’re having hormone therapy to treat your prostate cancer, your treatment may be less effective if you’re very overweight.
This is a topic people often call us about. Eating healthily, being physically active and staying a healthy weight is important for general health, but can be especially important for men with prostate cancer.
Many of you had questions and comments about the show. Here, one of our Specialist Nurses, Sophie, answers some commonly asked questions.
Cannabinoids (CBD) have been widely used in medicines for centuries to control pain, nausea or vomiting, and to stimulate appetite, especially in cancer patients. Both cannabinoids receptor 1(CB1) and cannabinoids receptor 2 (CB2) were highly expressed in cultured prostate cancer cells compared to normal prostate cell lines. CBD inhibits tumor growth in xenograft model.
Clinicians have been challenged to improve the treatment of biochemically recurrent (BCR) prostate cancer in which prostatic specific antigen (PSA) rises without radiological or clinical progression years after localized treatment (radical prostatectomy or radiation therapy) with or without hormonal treatment. Approximately 50-90% of men with high-risk prostate cancer will experience a BCR. Based on the abovementioned preclinical observations of CBD’s effect on prostate cancer and its safety data in two non-cancer populations, a phase I study of CBD in men with biochemically recurrent prostate cancer will be conducted.
– Stimulation of appetite: Cannabinoids seem to have only a modest effect in cancer patients with cachexia. More promising results were seen in studies in the population without cancer.
It is also important that we inform the patient about the possible interactions of cannabis oil with certain regular medications such as Coumarin (this blood thinner interacts with cannabis oil, leading to an increase of the INR and a greater risk of bleeding!). There are different types of cannabis oil available, such as CBD and THC oils with different concentrations which makes it difficult for patients to make a choice.
– Pain: Cannabinoids have been used for centuries to lessen pain. Historical texts and old pharmacopoeia noted the use of cannabis for menstrual cramps, pain during childbirth, and headaches. Studies have shown that the cannabinoids have no effect on acute pain and post- operative pain. Two placebo-controlled studies with a cannabis extract showed modest benefits when using cannabinoids in addition to opioids and other adjuvant pain-killers in cancer patients with chronic pain. However, the effect of cannabinoids in chronic neuropathic pain was clearly demonstrated in 29 randomized studies.
In the 1990s, the endocannabinoid system (ESC) of the body was discovered by Raphael Mechoulam, an Israeli professor of medical chemistry. The endocannabinoid system, a central regulatory system, is the body’s largest receptor system and is important to maintain the homeostasis of the body.
On the Internet, patients can get a lot of information about the curative effect of cannabis oil on prostate cancer but this information extrapolate the results of pre-clinical work to possible effects in people without any factual evidence. I often see patients in the doctor’s office showing me a website where it has been proven that cannabis oil can cure prostate cancer, which is obviously their own interpretation. In my view this can be a misleading message even though the website does not explicitly provide false information. The website [See figure below] shows information which is based on a study published in the British Journal of Cancer. This is correct, but the website “neglects” to mention that this is a publication of an in vitro study. The patient might not even know what an in vitro study is and is not aware that there are no studies on humans yet to prove this.
– Nausea and vomiting: An initial study in 1975 showed a beneficial effect of THC on nausea induced by chemotherapy. Subsequently, two systematic reviews showed benefits of cannabinoids in nausea and vomiting due to chemotherapy, but most studies were observational or uncontrolled.
Cannabis, a very easy plant to grow, has been used for centuries for its medicinal properties. The oldest known document about cannabis use originates from the Chinese emperor Shen Nung in 2727 B.C. It suggested that cannabis has a neuron-protective effect. The Egyptians used cannabis to treat glaucoma and as an anti-inflammatory agent (inflammation of the eyes, fever). Cannabis was even used in obstetrics (mixed with honey) and the mixture was applied in the vagina to “cool” the uterus. In the Old Testament, there is also an account of God instructing Moses to make a holy anointing olive oil-based “Kaneh Bosm.”