When treating a family member or friend for cancer or a serious infection, did your doctor mention a drug called 'Monoclonal Antibodies'? You may have been a little confused when you heard this name. You may have wondered what kind of drug it is, how it works, and whether there are any side effects. Don't worry, it's normal. Today, we'll talk about this in a very simple way that you can understand.
Simply put, what are these Monoclonal Antibodies (mAbs)?
To understand this, we first need to know about an amazing defense system that we have in our bodies. That is our immune system . Think of it like an army inside our bodies. This army has special soldiers. We call them antibodies .
The job of these antibodies is to recognize, attach to, and destroy foreign invaders, such as germs and viruses (we call these antigens ) . Cancer cells are also a type of enemy cell that develops in our own bodies and works against us. So these antibodies attack them too.
But sometimes, cunning enemies like cancer cells hide from these antibodies, trick them, and spread throughout the body. That's when our immune system needs help from outside.
Monoclonal Antibodies (mAbs) are a kind of special commando that comes to the aid of our army in times like these. These are a type of protein that is specially made in a lab. They work exactly like the antibodies in our body. But with a difference.
"Mono" means "one." So these Monoclonal Antibodies are just photocopies of a single type of antibody, many identical copies (clones). In other words, they're like a team of specialized soldiers trained to attack only one type of enemy (antigen). The names of these drugs end in the letters "mab." You can recognize them now if you see them.
What is the difference between monoclonal and polyclonal antibodies?
This is also good to know. We said earlier that "Mono" means one. "Poly" means "many."
- Monoclonal Antibodies: Because these are copies of a single type of antibody cell, they target only one antigen . Like a key that only fits one lock. Therefore, they are very specific and do not miss the target.
- Polyclonal Antibodies: Because these are produced by several types of immune cells, they can bind to several types of antigens at the same time. Like a set of keys that can open several locks.
Simply put, Monoclonal Antibodies are like a sniper who can identify the enemy and only shoot at them. Polyclonal Antibodies are like a shotgun that can shoot at a long range. This precision is very important in treatment.
What are monoclonal antibodies (mAbs) used for?
This technology is used in many areas of medicine today. Let's look at the main ones.
| Field of use | A simple explanation |
|---|---|
| Diagnosis | Remember the pregnancy test kit you use at home? That's what happens. The antibodies in it detect a specific hormone (antigen) in your urine. They're also used in laboratories to detect various things. |
| Tissue and blood typing | When performing something like an organ transplant, this technology helps to see if the donor and recipient's tissues are compatible. |
| To treat diseases (Disease treatment) | This is the most important part we're talking about today. These are used to treat very serious diseases like cancer and autoimmune diseases. |
What kind of diseases does this treatment treat?
Monoclonal antibody therapy is currently being used successfully for a wide range of diseases. Some of them include:
- Cancer: These are used to treat many types of cancer, including breast cancer, colon cancer, lung cancer, and blood cancers (leukemia, lymphoma).
- To prevent organ transplant rejection: When we receive an organ transplant, such as a kidney or liver from someone else, our body may think it is an enemy and attack it. This medicine helps to stop that.
- Inflammatory and autoimmune disorders: These are diseases in which our own immune system attacks our own healthy cells. Examples include rheumatoid arthritis and Crohn's disease. These are also used to control allergies.
- Infections: You may remember that there was a lot of talk about this treatment during the COVID-19 pandemic. It is also given for other serious viral infections.
- Osteoporosis
- Eye conditions
- Migraines
- High cholesterol in the blood
- Nervous system disorders
How is this treatment given?
This treatment is usually given in two ways.
1. Through a vein (Intravenous - IV):
This medicine is often given as a saline solution, or as an intravenous (IV) infusion . This is usually done in a hospital or infusion center. You may lie down in a chair or bed. A nurse will insert a small cannula into a vein in your arm and infuse the medicine into your body.
If this is your first time receiving this treatment, your doctor will ask you to bring a family member or friend with you. This is to help you learn about the treatment and to be there to help you if you have any reactions. The medical staff will be very careful the first time you receive it to see if you have any allergies.
2. Piercing under the skin (Subcutaneous):
Some monoclonal antibodies are also given as a subcutaneous injection, similar to insulin for diabetes . In these cases, you will be instructed on how to inject the vaccine. It is usually given into the skin of the abdomen or thigh.
Types of treatment methods
This treatment can also be divided into three main types based on the way it is given. This is a bit deep, but let's understand it simply.
| Type of treatment method | What happens in that? (Simply) |
|---|---|
| Naked Monoclonal Antibodies | In this case, the antibody works on its own. Nothing else is attached to it. It goes straight to an enemy cell, like a cancer cell, and signals our own immune system to destroy it. |
| Conjugated Monoclonal Antibodies | This is like a missile with a bomb attached. Here, a radioactive particle or a chemotherapy drug is 'conjugated' to the antibody. When the antibody finds and attaches to the cancer cell, the bound drug/radiation directly affects only the cancer cell. |
| Bispecific Monoclonal Antibodies | These are very clever antibodies. They can attack two enemies at the same time. For example, while one arm of this antibody grabs a cancer cell, the other arm grabs a powerful cell from our immune system, such as a T-cell, and brings it close to the cancer cell to destroy it. |
What are the advantages of this treatment method?
There are several reasons why this treatment method is so popular.
- High Precision: Unlike traditional cancer treatments (chemotherapy), there is very little damage to healthy cells because these antibodies go directly to and attack only the relevant diseased cells.
- Fewer side effects: Because there is less damage to healthy cells, some side effects may be fewer than with traditional treatments.
- High success rate: This treatment method has been more successful than other treatments for some types of cancer and diseases.
- Consistent quality: Because these are produced in laboratories, every batch of medicine produced has the same, standardized quality.
Aren't there risks and complications?
Like any medication, this treatment can have some risks and side effects. But don't worry, your medical team is taking care of everything.
Common Infusion Reactions:
These are the most common side effects. They can occur either when the medicine is given to the body or shortly after. This is a reaction of our body to a new medicine.
- Skin rash
- Fever
- Chills
- Difficulty breathing
- Sweating
- Blood pressure changes
- Increased heart rate
If this happens, the nurses will slow down the rate at which the medication is given. This will often control these symptoms.
Serious but rare risks:
These are very rare to see, but it's important to be aware.
- Acute Anaphylaxis: This is a very severe allergic reaction that occurs suddenly. It can be life-threatening. However, hospital staff are always prepared to treat such emergencies.
- Cytokine Release Syndrome (CRS): Also called a "cytokine storm," this is a condition in which the immune system becomes overactive, causing damage to the body's organs.
- Tumor Lysis Syndrome: A condition in which a large number of cancer cells are destroyed at once during cancer treatment, and the contents of the cells can enter the bloodstream and damage the kidneys.
Remember, these severe reactions are very rare. Also, the doctors and nurses treating you are always prepared to deal with something like this if it happens. So don't be unnecessarily afraid.
How long does it take to get back to normal after treatment?
The time it takes for this to happen varies from person to person and depending on the treatment received.
For example, when monoclonal antibody treatment was given for COVID-19, the drug was infused into the body for about an hour, and then the patient was observed for about another hour to see if there was any reaction.
After treatment, you will be able to return to work and daily activities as normal, provided you are not tired or uncomfortable. However, this all depends on the condition you have and your overall health. It is best to talk to your doctor about this and get advice.
Should I talk to the doctor about this treatment?
Yes, definitely.
- If you have already received this treatment and develop any unusual symptoms (e.g. severe itching, difficulty breathing, body swelling) after returning home, call your doctor immediately, or go to the Emergency Department (ETU) of the nearest hospital.
- If you have been diagnosed with a medical condition mentioned in this article, you have every right to ask your doctor, "Is Monoclonal Antibody Therapy Right for Me?" and discuss it with him.
Remember, the best treatment for you is determined by your doctor, who is familiar with your condition and health. Do not rely on the internet or newspapers to make your own treatment decisions or to give advice to others.
Monoclonal antibodies are a truly revolutionary treatment in medicine. They have given new hope to many people battling serious diseases like cancer. The most important thing is to be properly informed about this and act on medical advice.
Take-Home Message
- Monoclonal Antibodies (mAbs) are a special type of protein made in a laboratory that works like antibodies in our own immune system.
- These are a very effective way to treat cancer, autoimmune diseases, and severe infections like COVID-19.
- This treatment is often given through a vein (IV infusion), and although some side effects may occur, medical teams are prepared for it.
- Always talk openly with your doctor about the treatments available to you, their advantages and disadvantages, and any problems you may have.
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