Discovery of 4 subtypes of melanoma points to new treatment approaches

FINDINGSMelanoma, a relatively rare but deadly skin cancer, has been shown to switch differentiation states — that is, to regress to an earlier stage of development — which can lead it to become resistant to treatment. Now, UCLA researchers have found that melanomas can be divided into four distinct subtypes according to their stages of differentiation. Cell subtypes that de-differentiated — meaning that they reverted back to a less-mature cell — showed sensitivity to a type of self-inflicted cell death called ferroptosis.The research also showed that certain subtypes of melanoma cells could be successfully treated using multiple cancer therapies in combination with ferroptosis-inducing drugs.BACKGROUNDMelanoma arises from melanocytes, cells that produce pigments. Although targeted therapies and a greater understanding of cancer immunology have significantly improved survival, many patients either relapse or do not respond to treatment.METHODThe UCLA team, led by Dr. Thomas Graeber, analyzed the gene expressions of melanoma cells and compared them to information in public genetics databases to identify the four different subtypes of melanoma  with different drug sensitivities. The team organized the melanoma cells according to characteristic patterns of genes they had turned on. Comparing the gene expression patterns to data from stem cells induced to differentiate to melanocytes, they discovered that melanomas can be found in four dif ferent diff...
Source: UCLA Newsroom: Health Sciences - Category: Universities & Medical Training Source Type: news

Related Links:

In conclusion, this study makes clear that lncRNA THOR is up-regulated in retinoblastoma, and its over-expression significantly enhances the malignant phenotype transformation of retinoblastoma cells through up-regulating c-myc expression via enhancing its combination with TGF2BP1 protein. Overall, our study illustrates that lncRNA THOR/c-myc molecular cascade might be another potent target for retinoblastoma treatment.
Source: Biomedicine and Pharmacotherapy - Category: Drugs & Pharmacology Source Type: research
AbstractEfforts to prevent melanoma, especially for those at elevated risk for the disease, should ideally begin during childhood. However, there are few preventive interventions targeting children who are at higher risk for melanoma due to a family history of the disease. Further, there are no educational interventions that aim to help these at-risk children understand their risk for melanoma and the ways in which preventive behaviors, such as sun protection, can mitigate their risk. The current paper describes a multidisciplinary team ’s process for creating a developmentally appropriate educational intervention ab...
Source: Journal of Cancer Education - Category: Cancer & Oncology Source Type: research
Conclusions“InterPreT Cancer Survival” is presented as an educational tool which engages the user through interactive features to improve the understanding of commonly reported cancer survival statistics. The tool has received positive feedback from a Cancer Research UK patient sounding board and there are further plans to incorporate more disease characteristics, e.g. stage.
Source: Cancer Epidemiology - Category: Cancer & Oncology Source Type: research
ConclusionsWe found some evidence that higher intake of folate from food only was associated with a modest increased risk of cutaneous melanoma. However, since other factors related to dietary folate intake may account for the observed association, our findings warrant further investigation.
Source: Cancer Epidemiology - Category: Cancer & Oncology Source Type: research
Eye Cancer: Intraocular (Uveal) Melanoma Treatment
Source: eMedicineHealth.com - Category: General Medicine Source Type: news
I took our cat, Peekaboo, to the vet two days ago, around lunchtime. When her new CAT scan results came in, my vet told me that, even though the melanoma had spread a bit in the past two weeks, the cancer hadn’t gone into the jawbone yet. She recommended that we do the surgery. After asking a few obvious but almost-impossible-to-answer questions (will the surgery PROLONG HER LIFE without impacting her QUALITY OF LIFE, blablabla), I called Stefano, and we both agreed it was our only choice at this point, even though there really aren’t any guarantees: this sort of cancer is very aggressive, so it may come back a...
Source: Margaret's Corner - Category: Cancer & Oncology Authors: Tags: Blogroll cat surgery feline oral cancer feline oral melanoma Source Type: blogs
We have previously shown that Notch1 plays a critical role in modulating melanoma tumor cell growth and survival. Here we show that Notch1 also contributes to an immune-suppressive tumor microenvironment (TME). Notch1 inhibition reduces immune suppressive cells (i.e. MDSCs and Tregs) while allowing the recruitment of functional CD8(+) T cells, leading to a decrease in the Tregs/CD8(+) ratio, a key parameter in assessing positive responses to immune-checkpoint inhibitors. Inhibition of Notch1 improves the antitumor activity of nivolumab and ipilimumab, particularly when given in combination.
Source: Cancer Letters - Category: Cancer & Oncology Authors: Tags: Original Articles Source Type: research
THURSDAY, July 19, 2018 -- Hand-holding and squeezing a stress ball do not provide anxiety reduction among patients during excisional removal of non-melanoma skin cancer, according to a study published online July 18 in JAMA Dermatology. Arianna F....
Source: Drugs.com - Pharma News - Category: Pharmaceuticals Source Type: news
CONCLUSIONS: As transplant recipients are susceptible to skin changes, especially after immunosuppressant treatments, a dermatological follow-up should be scheduled for each patient. PMID: 30014685 [PubMed - as supplied by publisher]
Source: Giornale Italiano di Dermatologia e Venereologia - Category: Dermatology Tags: G Ital Dermatol Venereol Source Type: research
This study evaluates the impact of CXCL5 expression on the tumor mircoenvironment in a syngeneic mouse melanoma model.
Source: GEO: Gene Expression Omnibus - Category: Genetics & Stem Cells Tags: Expression profiling by high throughput sequencing Mus musculus Source Type: research
More News: Allergy & Immunology | Cancer | Cancer & Oncology | Cancer Therapy | Databases & Libraries | Drugs & Pharmacology | Genetics | Grants | Immunotherapy | Learning | Melanoma | Skin | Skin Cancer | Spain Health | Stem Cell Therapy | Stem Cells | Students | Study | Universities & Medical Training