Can Our Genetic Blueprint Reveal Future Health Risks?
Can Our Genetic Blueprint Reveal Future Health Risks?
Recently, while looking at a medical report, I came across a genetic test performed because a patient's mother had breast cancer. The purpose was to understand whether the patient had inherited a genetic change that could increase her risk of developing the disease.
That made me curious.
If genetic testing can help identify an inherited risk of breast cancer, what about other diseases? Are there tests that can identify a person's susceptibility to diabetes, heart disease, neurological disorders, or inherited blood disorders? Can we discover certain risks before symptoms appear and take steps to prevent a disease or detect it early?
Another question came to my mind. Traditional medical systems such as Siddha and Ayurveda have their own ways of understanding individual constitution, health, and disease susceptibility. Modern medicine, meanwhile, can examine our DNA and identify certain genetic variations associated with disease.
Could we explore a connection between these approaches?
I wanted to understand what genetic science can already tell us, how these tests are performed, and what possibilities may exist for connecting traditional medical knowledge with modern research.
What Is Genetic Testing?
Our DNA contains the biological instructions that help determine how our cells function. Genes carry information involved in processes such as protein production, metabolism, growth, and the regulation of many bodily functions.
Genetic testing examines DNA, chromosomes, or certain gene-related markers to identify variations that may cause disease, increase susceptibility, or influence how a person responds to particular medicines.
Some genetic variations have little or no effect on health. Others can cause inherited disorders or increase the likelihood of developing certain conditions.
Genetic testing is used for several purposes:
- Predictive testing: Identifies certain genetic changes associated with an increased future risk of disease.
- Diagnostic testing: Helps establish the genetic cause of a suspected or existing condition.
- Carrier testing: Identifies people who carry particular genetic variants that may be passed on to their children.
- Prenatal and newborn testing: Investigates or screens for selected genetic and chromosomal conditions.
- Pharmacogenomic testing: Examines how genetic variations may influence the effects or side effects of certain medicines.
An important distinction is that a genetic test does not always prevent disease directly. It may identify a risk, allowing doctors to recommend earlier screening, preventive measures, or appropriate treatment.
Which Diseases Can Genetic Testing Help Identify?
1. Hereditary cancers
| Condition or risk | Genes commonly investigated |
|---|---|
| Hereditary breast and ovarian cancer | BRCA1, BRCA2 |
| Lynch syndrome | MLH1, MSH2, MSH6, PMS2, EPCAM |
| Familial adenomatous polyposis | APC |
| Li-Fraumeni syndrome | TP53 |
| Inherited endocrine tumour syndromes | RET, MEN1 and others |
... (rest of disease sections continue with tables and lists as in your text)
Conclusion: What Can We Learn Before Disease Begins?
My curiosity began with a single medical report, but it led me to a much broader question: how much can we understand about a person's health before a disease develops?
Modern genetics already helps identify certain inherited disorders, assess specific disease risks, guide reproductive decisions, and improve selected treatment choices. Yet it cannot predict every disease, and a genetic risk is not a fixed destiny.
The relationship between traditional understandings of individual constitution and modern molecular biology is another area worth exploring. Rather than assuming that the two are already equivalent—or concluding that no connection is possible—we can investigate the evidence and ask whether combining different approaches can improve our understanding of health.
Perhaps the real value of this exploration lies not in finding a genetic test for every disease, but in learning what current science can reveal, recognising its limitations, and continuing to ask meaningful questions.
Sometimes, a single observation in a medical report can open the door to a much larger journey of learning.
This article is for educational purposes only. Genetic testing and disease-risk assessment should be discussed with an appropriately qualified healthcare professional or genetic counsellor.
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