People over 65 are around seven times more likely to develop malignant melanoma compared to 40 years ago, according to new figures released by Cancer Research UK today (Monday).
“Many cases of malignant melanoma, the most serious form of skin cancer, are preventable by taking precautions in the sun and making sure you don’t burn.” – Dr Julie Sharp
Older men in Great Britain are around 10 times more likely to be diagnosed with this kind of life-threatening skin cancer than their parents’ generation while older women are around five times more likely to develop this disease.*
The most recent figures show that on average around 5,700 pensioners are now diagnosed with melanoma each year compared with just 600 in the mid 1970s.**
While age is one of the biggest risk factors for melanoma the huge increase in pensioners being diagnosed with the disease is ikely to be linked to the cheap package holiday boom dating from the 1960s, and the desirability of having a tanned appearance even at the expense of painful sunburn.
Getting sunburnt just once every two years can triple your risk of developing malignant melanoma and even reddening of the skin is a sign of damage.
There’s a running joke that if you check your symptoms on the Internet, it will probably diagnose you with cancer.
But there seems to be a growing trend that we are starting to rely more and more on digital technology to help us with our health. For example, WebMD last reported an average of 156 million unique users per month – a 33 per cent increase from the previous year.
Health apps (applications that offer health-related services on your mobile phone or tablet) are flooding the market. And the same goes for wearable technology, or ‘wearables’, like the Fitbit, JawBone and most recently the Apple Watch.
One recent study in JAMA Dermatology, which looked at various skin cancer apps, found that three out of the four apps they examined incorrectly classified at least 30 per cent of melanomasas ‘unconcerning’.
The only one that was accurate wasn’t a diagnostic app at all – it helped people with suspected skin cancer by sending a picture directly to a certified dermatologist.
Another study, this time published in the British Journal of Dermatology, examined 39 skin cancer-focused apps and found that none them had been validated for diagnostic accuracy or usefulness by any established research methods.
View the full story here http://scienceblog.cancerresearchuk.org/2015/04/24/health-apps-a-note-of-caution/
An innovative approach using a tetanus booster to prime the immune system enhances the effect of a vaccine therapy for lethal brain tumors, dramatically improving patient survival, according to a study led by Duke Cancer Institute researchers.
In a small human study, they enrolled 12 brain tumor patients, with half randomly assigned to receive a tetanus booster and the other half a placebo injection. The next day, patients in both groups were then given the dendritic cell immunotherapy. Researchers did not know which therapies the patients received.
Patients randomized to get a tetanus shot showed a significant increase in survival from the time of pre-conditioning compared to patients receiving just the dendritic cell therapy, with half living from 51 to 101 months, compared to 11.6 months for the comparison group. One patient from the tetanus group continues to have no tumor growth and is still alive at eight years after the treatment.
Link to the research: Duane A. Mitchell, et al., Tetanus toxoid and CCL3 improve dendritic cell vaccines in mice and glioblastoma patients. Nature, 2015; DOI: 10.1038/nature14320
Researchers at University of California San Diego School of Medicine report pancreatic cancer rates are highest in countries with the least amount of sunlight. Low sunlight levels were due to a combination of heavy cloud cover and high latitude.
Researchers studied data from 107 countries, taking into account international differences and possible confounders, such as alcohol consumption, obesity and smoking. “While these other factors also contribute to risk, the strong inverse association with cloud-cover adjusted sunlight persisted even after they were accounted for,” said Garland.
Link to research: Cedric F. Garland, et al., Cloud cover-adjusted ultraviolet B irradiance and pancreatic cancer incidence in 172 countries. The Journal of Steroid Biochemistry and Molecular Biology, 2015;
Around half of melanomas are caused by a mutation in a gene called BRAF. Drugs called BRAF inhibitors treat these melanomas by targeting the faulty gene. But these cancers can quickly develop resistance to these targeted treatments.
Scientists at the Francis Crick Institute, (link is external) funded by Cancer Research UK, and at the Cancer Research UK Manchester Institute (link is external) have discovered that a side effect of BRAF inhibitors is that they prompt healthy cells to form a ‘safe haven’ shielding melanoma cells from cancer drugs. So even if some cancer cells are destroyed, the protected cancer cells may survive – and the disease can recur in a form that is untreatable.
Carried out in cells in the laboratory, in mice and in samples from patients’ tumours, the researchers showed this ‘safe haven’ lets melanoma cells turn on a parallel set of cell signals that helps them survive. By adding a second experimental drug that blocks this alternative survival route by targeting a protein called FAK, the researchers discovered that resistance to BRAF inhibitors can be overcome. This combination of two drugs increased cell death and slowed growth in cell samples, and also stopped tumours from growing larger in mice.
Link to research: Hirata et al., Intravital Imaging Reveals How BRAF Inhibition Generates Drug-Tolerant Microenvironments with High Integrin b1/FAK Signaling, Cancer Cell (2015)
Picture credit: Dr Erik Sahai
A person’s genetic make-up might determine whether they could benefit from taking aspirin to prevent bowel cancer, according to a US study. The findings also suggest that the drug could even increase cancer risk in a minority of people – although experts cautioned that more research was needed to confirm this.
The team combined the results of several previous studies on aspirin and other similar drugs – collectively called non-steroidal anti-inflammatory drugs, or NSAIDs – comprising more than 8,600 people who went on to develop bowel cancer, and a similar number who remained healthy.
They then analysed participants’ DNA records, and looked at whether certain genetic variants, known as single-nucleotide polymorphisms, were more or less common in each group.
As well as confirming the overall benefits of aspirin in preventing the disease, they found that nearly one in 10 study participants (nine per cent) who had a particular genetic variation received no benefit from the drug.
And a further four per cent – one in 25 – who carried one of two other DNA variants appeared to have an increased likelihood of going on to develop bowel cancer after taking aspirin.
Link to the research: Nan H, Hutter CM, Lin Y, et al. Association of Aspirin and NSAID Use With Risk of Colorectal Cancer According to Genetic Variants. JAMA. 2015;313(11):1133-1142. doi:10.1001/jama.2015.1815.
Olaparib was licensed in December for women with ovarian cancer and inherited BRCA mutations, but the new research suggests it could also benefit men with genomic faults within their tumours.
Researchers told the American Association of Cancer Research (AACR) conference in Philadelphia that up to 30 per cent of men with advanced prostate cancer had tumours with defects in repairing DNA — and these responded particularly well to olaparib. The men most likely to benefit could be identified by genetic testing to look for mutations in genes responsible for DNA repair — including the BRCA genes and the gene ATM.
Link to the research: Mateo et al, DNA repair defects and antitumor activity with PARP inhibition: TOPARP, a phase II trial of olaparib in metastatic castration resistant prostate cancer, AACR conference 2015
Scientists have mapped genes affected by phytonutrients in soy, and have found that minimally processed soy flour suppresses breast cancer, while purified isoflavones stimulate genes that accelerate tumor growth, raising questions about soy supplements’ safety for postmenopausal women.
Scope – Soy flour diet (MS) prevented isoflavones from stimulating MCF-7 tumor growth in athymic nude mice, indicating that other bioactive compounds in soy can negate the estrogenic properties of isoflavones. The underlying signal transduction pathways to explain the protective effects of soy flour consumption were studied here.
Methods and results – Ovariectomized athymic nude mice inoculated with MCF-7 human breast cancer cells were fed either MS or purified isoflavone mix (MI), both with equivalent amounts of genistein. Positive controls received estradiol pellets and negative controls received sham pellets. GeneChip-Human-Genome-U133-Plus-2.0 Array platform was used to evaluate gene expressions, and results were analyzed using bioinformatics approaches. Tumors in MS-fed mice exhibited higher expression of tumor-growth-suppressing genes ATP2A3 and BLNK, and lower expression of oncogene MYC. Tumors in MI-fed mice expressed higher level of oncogene MYB and lower level of MHC-I andMHC-II, allowing tumor cells to escape immunosurveillance. MS-induced gene expression alterations were predictive of prolonged survival among estrogen-receptor-positive breast cancer patients, whilst MI-induced gene changes were predictive of shortened survival.
Conclusion – Our findings suggest dietary soy flour affects gene expression differently than purified isoflavones, which may explain why soy foods prevent isoflavones-induced stimulation of MCF-7 tumor growth in athymic nude mice.
Liu, Y. et al. Isoflavones in soy flour diet have different effects on whole-genome expression patterns than purified isoflavone mix in human MCF-7 breast tumors in ovariectomized athymic nude mice. Molecular Nutrition & Food Research, 2015
The Women’s Health Initiative Studies, a large prospective study of lung cancer, found no strong associations between lung cancer risk and a wide range of reproductive history variables and only revealed weak support for a role of hormone use in the incidence of lung cancer.
In the United States 40% of the 160,000 deaths from lung cancer are women. In men 90% of lung cancer deaths are associated with tobacco usage; however in women this number is around 75-80%. Female never-smokers are more likely to develop lung cancer than male never-smokers and the histological subtype of lung cancer is different between men and women. Women have a better prognosis with a 5-year survival rate of 20% compared to 15.4% for men. Given these gender differences there is a need to understand the potential role of reproductive factors and hormone use in determining lung cancer risk in women.
The Women’s Health Initiative Observational Study and Clinical Trials enrolled a geographically and ethnically diverse cohort of 161,808 postmenopausal women age 50-79 years between 1993 and 1998 at 40 centers across the United States. Reproductive history, oral contraceptive use, and hormone therapy replacement was evaluated in the 160,855 women eligible to be included in the analysis. Incident lung cancer was observed in 2,467 and the median follow-up was 14 years.
Schwartz, A.G. et al. (2015) Hormone Use, Reproductive History and Risk of Lung Cancer: The Women’s Health Initiative Studies. Journal of Thoracic Oncology. [Post Acceptance: April 3, 2015]
Childhood cancer survivors are five times more likely to have enrolled in a Social Security disability assistance program than other citizens, a new American study concludes. “The long-term impact of cancer can affect other issues besides health outcomes,” said the lead author on the study. “We need to do a better job of helping people function throughout their lives, not just when they’re finishing their cancer therapy.”
The study looked at health insurance surveys completed in 2011-2012 by a random sample of 698 childhood cancer survivors that were diagnosed between the ages of 0-20–today they range in age from their 20s to early 60s. The patients are part of a National Cancer Institute initiative, called the Childhood Cancer Survivor Study, which has followed more than 14,000 children and adolescents since 1994 who were diagnosed with cancer and survived for at least five years after diagnosis. A comparison group of 210 siblings without cancer also responded to the survey and were used as a control for the study.
Kirchhoff said they looked at current or former enrollment on two federal disability programs: SSI for people with limited income who have no prior work history, and Social Security Disability Insurance (SSDI), which pays disability benefits to adults ages 18 years and older who have worked and paid social security taxes.
They found that a total of 13.5 percent of survivors had ever been enrolled on SSI, while 10 percent had ever been enrolled on SSDI. This was significantly higher than was found for the comparison group, 2.6 percent on SSI and 5.4 percent on SSDI. Survivors were also currently enrolled in SSI more frequently than the U.S. population, 7.3 percent versus 2.5 percent, respectively.
via Science Daily: http://www.sciencedaily.com/releases/2015/04/150421131724.htm