Tag: genetics

No other landscape in medicine has changed as drastically as the field of Clinical Genetics – Is Ireland behind the curve?

Advances in technology have been a major driver of the explosion of knowledge in genetics, now allowing us to sequence the entire human genome in a short period of time and at a fraction of the cost of previous years.

This has led to a better understanding of the natural history of cancer, the ability to assess genetic risk for cancer across populations, the development of clinical management strategies to reduce cancer risk, the development of novel therapeutic agents which target genetic alterations, and to improved education of patients and providers about genetic risk.

Hereditary cancer is hard enough to navigate, so we are thankful for patient-friendly information to help inform the decision-making process.

https://www.stjames.ie/cancer/yourtreatmentandcare/servicesandtreatments/cancergeneticsservice/

Genetic testing is a vital tool in enabling individuals to be proactive in their health care to achieve the best possible outcomes.

It’s very important for everyone to understand their cancer risks based on their personal or family history since their personal risk level may necessitate earlier, more frequent, and/or more intensive cancer surveillance.

This is the best way to ensure that you are doing everything you can to prevent cancer or catch it early when treatment has the best outcome.

At present cancer genetics services in Ireland are underdeveloped and underfunded. Only a fraction of staff required are in place. As a result long waiting times, extra cost to the state because cancers are not prevented and discovered at a later stage.

Cancer Genetic Appointments

During your appointment, a member of the team will confirm your family history/ family tree details with you and may ask about other medical conditions in your family (where known).

If a cancer genetic alteration (gene fault) exists in your family, or there is a possibility of an inherited genetic alteration, our team will discuss the condition and outline the choices and options available to you.

What is ‘Diagnostic Cancer Genetic Testing’?

Diagnostic cancer genetic testing is helpful when an individual with cancer is unaware of whether a gene alteration is present within their family. A blood test can be taken either from you or an eligible family member (i.e. the blood test must be taken from someone with cancer), to identify any alteration (gene fault) in your DNA. If a cancer gene alteration exists, it may be responsible for causing cancer in you, and/ or in other family members.

What is ‘Predictive Cancer Genetic Testing’?

If a cancer gene alteration is identified in your family, you may opt to undergo a predictive cancer genetic test to determine if you carry your family’s alteration, using a blood sample taken from you.

https://www.stjames.ie/cancer/yourtreatmentandcare/servicesandtreatments/cancergeneticappointments/

The increasing role of cancer genetic counsellors

November 14 was Genetic Counsellor Awareness Day in Ireland and around the world. It’s important to note that it is an ‘awareness’ day rather than an ‘appreciation’ day because genetic counselling is still an under-recognised field. Genetic counsellors are healthcare professionals who provide information and support to families and individuals who are at risk for or affected by a genetic condition.

We have 17 cancer genetic counsellors and two genetic counselling assistants at City of Hope to handle this volume. In contrast, there are five cancer genetic counsellors at St James’s Hospital in Dublin.

Dr O’Shea said the St James’s cancer genetic service welcomed Minister for Health Stephen Donnelly’s announcement of funding to implement the Hereditary Cancer Model of Care in 2025. Genetic counsellors are a key part of delivering optimal oncology care. To respond to the demand for access to cancer genetic testing and counselling, permanent funding for 20 cancer genetic counsellors in oncology care is required nationally to serve a population of 5.3 million people. Additionally, a step forward to increase the capacity of genetic counsellors in the Irish health system is a HSE-funded training pathway.

The increasing role of cancer genetic counsellors

A genetic mutation can save lives – Lynch syndrome paves the way for cancer vaccines and personalised treatments

While Lynch syndrome increases the risk of cancer for its carriers, it also provides a unique opportunity to understand disease mechanisms. It is likely that the first preventive cancer vaccine will be specifically developed against cancers caused by Lynch syndrome.

From the individual’s perspective, Lynch syndrome and its prevalence in the population is not a positive thing, but from the research standpoint it is, meaning that the disease can also benefit patients.

“Currently, there is intense development work on cancer-preventive vaccines, which will soon be tested in large patient groups. The most progress has been made with cancers linked to Lynch syndrome. It will be a major breakthrough when we can prevent cancers that we know are likely to develop,” Seppälä says.

In Lynch syndrome, identifying carriers of the genetic mutation is vital because healthcare interventions can greatly benefit these patients. Generally, there needs to be greater awareness in society about the importance of molecular profiling. 

https://www.tuni.fi/en/news/genetic-mutation-can-save-lives-lynch-syndrome-paves-way-cancer-vaccines-and-personalised

Why biomarkers matter

Your biomarker profile can help you and your doctor personalise your treatment.

Biomarkers for colorectal cancer are used for diagnosis, progression, prognosis, and for treatment planning.

MSI-H and MSS biomarkers indicate the stability of the DNA in a tumour.

Colorectal cancer tumours are often referred to as having an “MSI status,” meaning they are described as either MSI (microsatellite instable) or MSS (microsatellite stable). They cannot be both.

What does an abnormal MSI-H level mean?

Approximately 15% of colorectal tumours are MSI-H and dMMR.

In most of these cases, the mutation was caused by a non-hereditary(somatic) gene abnormality in one of the MMR genes (MLH1, MSH2, MSH6, or PMS2) in a cancer cell.

In 3-5% of colorectal patients, dMMR and MSI-H are caused by Lynch syndrome. In these patients, a hereditary mutation (germline mutation) in one of the four main MMR genes is passed from one generation to another. Individuals with Lynch syndrome are at higher risk of developing colorectal, endometrial (uterine), gastric, ovarian, and other cancers.

https://colorectalcancer.org/treatment/types-treatment/why-biomarkers-matter?fbclid=IwY2xjawGS4ZdleHRuA2FlbQIxMAABHbYOX7PocmBtDNPHc2xa9sZkA9PksceERIsPMZvOxLKfG4JN-vr7soOjmw_aem_irNH19G4iH7a4SZxGpm4Wg

The role of the Genetic Counsellor in the multidisciplinary team: the perception of geneticists in Europe(2022)

Genetics has begun to be considered a key medical discipline which can have an impact on everyday clinical practice. Therefore, it is necessary to understand what the most effective way is of caring for people affected by or at risk of genetic disorders.

This new profession has difficulties in being recognised in some countries(including Ireland), it seems clear that these highly competent professionals are essential for in-patient care and in the multidisciplinary team.

In the United Kingdom clinical geneticists are medically qualified Members/Fellows of the Royal College Physicians or equivalent, where Clinical Genetics is an affiliated medical specialty. Genomic or genetic counsellors are allied health professionals with Masters level accreditation from the Genetic Counsellor Registration Board included in the Academy for Healthcare Science register and clinical scientists (genomic counselling specialty) accredited by the Health and Care Professions Council. https://www.nature.com/articles/s41431-022-01214-7/figures/1

This research(although limited) brought to light the importance of the multidisciplinary team in caring for patients with or at risk of genetic disorders by highlighting the role and necessity of the genetic counsellor within the team. 

https://www.nature.com/articles/s41431-022-01189-5?fromPaywallRec=false