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Personalised medicine has obvious benefits but has anyone thought about the issues?

Personalised medicine allows treatment to be tailored to a patient’s unique genetic makeup. from shutterstock.com

Personalised medicine has obvious benefits but has anyone thought about the issues?

US Vice President Joe Biden recently launched The Genomic Data Commons, an open-access database that contains genomic and clinical data of 12,000 patients.

The aim is to allow researchers to better understand cancer’s development, which will help tailor treatments to individuals’ particular cancers.

This kind of approach is called personalised medicine and is said to be the next frontier in health care. A recent study in the journal Nature, for instance, reported groundbreaking research on the genetic causes of breast cancer. The study’s lead author described it as “a step closer to personalised health care for cancer”.

Personalised medicine has many benefits, such as treatment for cancers previously considered untreatable. This high-tech medical field also presents some regulatory problems, as outlined by a group of international experts – of which we were part – in the Journal of Law and the Biosciences. These are:

• personal privacy – the genetic research and testing needed for personalised medicine reveals people’s deepest genetic secrets

• consumer protection – a growing private industry is selling genetic tests to consumers, sidestepping the traditional relationship between doctor and patient

• health care costs – worries about genetic risk factors for disease drive some people to undergo costly, and possibly unnecessary, tests and treatments.

Personal privacy

To find out how genes contribute to diseases, large collections of human tissue, blood, urine and saliva are stored in repositories called biobanks. Biobanks – much like the Genomic Data Commons – can be set up by public or private sector entities, such as government health departments, university research institutes and even drug companies. Researchers can then access the biobank collections for a variety of projects.

More funding for research into personalised medicine is part of Joe Biden’s cancer ‘moonshoot’ initiative. silvia loré/Newzulu/AAP

Members of the public and people with specific conditions “participate” in biobanks by donating their materials. A research team or a health care provider might invite them to participate. Participants are asked to share personal details about their lifestyle and medical and family history.

UK Biobank is a leading international example. It holds biological samples from half-a-million people. Closer to home, the Australasian Biospecimen Network is a network of 35 domestic and international biobanks for cancer research.

People become participants in biobanks without knowing what their genes might reveal and how researchers will use them in the future. Research studies can uncover a person’s genetic future – such as a predisposition to Alzheimer’s disease – and genetic past, including ancestry details.

Many of the non-profit biobanks, like UK Biobank, ask people to give broad consent for use of their materials in unspecified future health studies, including after their death.

These types of biobanks have established their own robust governance frameworks to ensure that laws and ethical principles are followed and participants’ wishes are respected. However, this kind of regulation doesn’t apply everywhere.

In a high-profile case a few years ago, Arizona State University agreed to return blood samples to the Havasupai Indian tribe after complaints that researchers had used the samples for genetic studies without the tribe’s agreement.

Consumer protection

Health care in the genomic era involves new relationships between the individual and key players in the biomedical sector, including diagnostics (medical testing), drug industries and health care professionals.

Consumers can buy genetic tests from private companies without the advice of a doctor or genetic counsellor. Businesses peddle nutritional products and cosmetics, claiming they act on people’s genes to help them lose weight and maintain a youthful glow.

Some businesses claim their products act on people’s genes to slow the ageing process. from shutterstock.com

Consumers, health care professionals and regulators must try to separate the rorts from evidence-based practice. Dermatology researchers are investigating how genes affect what our skin looks like, so legitimate anti-ageing products may one day keep us young. And the field of pharmacogenomics already helps doctors tailor some drugs to increase the effectiveness of the therapy and reduce harmful side effects.

However, once genetic testing and personalised therapies become more widely available, how do we ensure it’s for the right reasons?

Health care costs

The hope is that precision medicine will eventually enable more cost-effective care. Yet easy access to genetic testing could create a growing class of the “worried well” – people afraid their genetic makeup is a ticking time-bomb for future disease.

Angelina Jolie’s public disclosure of her high genetic risk for breast and ovarian cancer prompted a spike in women seeking genetic testing. In the same way, people who buy genetic screening tests from online businesses may end up in their doctor’s office wanting help to understand the results.

Initiatives like the Choosing Wisely campaign can help consumers and clinicians decide if a particular test or treatment is likely to offer benefits that outweigh potential harms. In a genomic era, we will need education on how to judge the value of genetic testing and gene-based medical interventions.

Regulating wisely

Existing laws that forbid misleading commercial practices, protect personal privacy and establish frameworks for reviewing new drugs and treatments may be adequate, at least in the short term. But as the field of personalised medicine develops, governments may need to change laws and policies to promote safe and cost-effective use.

Our expert group warned against over-regulation, which may stifle genomics research and the translation of findings into new therapies. Trust between the public, biobanking organisations and researchers is crucial. Public trust is likely to be challenged when there is commercial involvement, either in the biobank itself or the research it supports. Biobanks should be transparent about their activities and tell people up front the terms on which researchers can use stored samples.

Health care providers are no longer gatekeepers between patients and their genetic information. But they will need the knowledge and skills to help people understand genetic risks and decide when personalised medicine may be an appropriate option for their care.

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