Your family members may have told you, "Your eyes are just like your father's," and "Your smile is just like your mother's." We call our appearance, our traits, and the things we get from our mother and father genes . These genes are inherited from our parents. But this genetic story is much deeper and more surprising than we think. Today we are talking about the latest chapter in that deep story, which is genomic medicine . This is a new technology that is going to make a big difference in the medical field.
What is Genomic Medicine?
Simply put, genetic medicine is the study of how all the genes in a person's body work together to affect the body. Think of it this way. You can't get an idea of an entire house from a single brick. But if you look at the complete blueprint of a house, you can understand everything about what the house looks like, where the rooms are, and how the doors and windows are. In the same way, a single gene is like that brick. But the collection of all the genes in your body (Genome) is like the complete blueprint of that house. Within this blueprint, there is a complete set of instructions for how your body will grow and develop. These instructions are written in molecules called DNA .
Although this field is relatively new, it has developed rapidly in the past few decades. A major reason for this was the Human Genome Project , which was completed in 2003. It was a massive program that brought together scientists from all over the world. Its goal was to identify all the genes in a human body, map them, and understand their function. It was there that scientists discovered that there are about 20,500 genes in our bodies.
Using this knowledge, doctors can now identify who is at higher risk of developing certain diseases , such as cancer and rare diseases that affect young children. This technology will also help in the future to choose the most effective treatment for a patient.
What is the difference between Genetics and Genomics?
Although these two words sometimes sound the same, there is a clear difference between the two. It is very important to understand this difference.
Genetics is the study of individual genes. Genomics is the study of the genetic system, that is, how all genes work together.
For example, you may have heard that certain gene mutations can cause disease. People with a BRCA gene mutation have a much higher risk of developing breast and ovarian cancer than the average person. If you have any concerns, talk to your doctor about getting a blood test that checks for that particular gene. That's called genetics.
But genomics is much broader than this. It involves mapping the DNA sequence of all the genes in your body. This is called genomic sequencing . Although this may seem like a complicated task, the cost of this has now decreased significantly with the development of new technology.
The table below can further explain this difference.
| Feature | Genetics | Genomics |
|---|---|---|
| Pay attention to | About a single gene or several genes | About all the genes (Genome) of a person |
| Scale | Narrow scope | Very broad (Broad scope) |
| Main objective | Finding the link between inherited diseases and individual genes | Studying the complex relationships between disease, environment, and genes |
| Example | BRCA gene testing for breast cancer risk | Whole genome testing for an unidentified disease |
Should I also have my genetic test (Genome Sequencing) done?
This is a question that many people have. There are already places around the world where this type of testing can be done. But is this really something everyone needs?
As things stand, this test is most useful only in a few specific situations.
- Children with difficult-to-diagnose medical conditions: Some children may have congenital health problems, intellectual disabilities, developmental delays, or frequent seizures . When the cause cannot be found through routine tests, genomic sequencing may be able to find the cause. Once the cause is identified, treatment can be modified.
- Some cancer patients: For patients with certain cancers, especially blood cancers, this test can help them choose the most suitable and effective treatment for them. This is what we call "precision medicine." That is, instead of giving everyone the same medicine, we design treatment that is tailored to your genes.
If you have cancer, it's important to talk to your doctor about this type of test. Depending on the type of cancer you have, the information from this test may help guide your treatment or help you understand the progression of your disease.
What are the advantages and disadvantages of this genetic test?
This technology is very exciting and holds great promise. But like both sides of a coin, it has its advantages and disadvantages that need to be considered.
| Pros | Cons |
|---|---|
| Knowing your disease risks: If you know you have a genetic predisposition to diseases like heart disease, you can adopt a lifestyle that reduces your risk. | Inconclusive results: Because scientists still don't understand the role of many genes, your test may find changes that have no known meaning. |
| Specific therapies: Helping to select the most effective, personalized treatments for diseases like cancer. | Stress: Learning that you have a terminal illness for which there is no cure can cause severe anxiety or depression. |
| Undiagnosed disease diagnosis: Being able to find a specific cause for medical conditions that have not been identified for a long time. | Privacy issues: You should consider having your entire genetic information held by a private company. You should be concerned about data security. |
If you are considering such a test, you should also consider the potential for stress from the information it provides. While some people may like to know their future in advance, others may not be able to handle it. Also, think twice about giving your highly personal genetic information to a private company. Read and understand their data protection policies carefully.
Take-Home Message
- Genomic medicine is not about a single gene, but about how all the genes in your body work together .
- This is a new field in medicine. It has great potential to diagnose rare diseases that are difficult to diagnose, and to provide personalized medicine to cancer patients.
- This is not a routine test that everyone should have at this time. It is currently most useful for people with specific medical needs.
- While this test may have benefits, it can also cause negative consequences in terms of stress and the security of personal data.
- Most importantly: If you are considering having this type of test, don't make any decisions on your own. Be sure to talk to your doctor first and get his or her advice.
💬 අදහස් (0)
තවමත් කිසිදු අදහසක් පළ කර නොමැත. ඔබේ අදහස පළමු වරට මෙහි එක් කරන්න.
ඔබේ අදහස එක් කරන්න