What Is Platinum-Based Chemotherapy? About the Most Widely Used Effective Cancer Drug

Platinum-based chemotherapy has an important place in cancer treatment and has offered hope to many patients. It fights cancer by targeting cancer cells. This article examines in detail what platinum-based chemotherapy is, how it works, and what adverse effects it may cause.

Note: The English term “platinum-based” has several equivalent renderings: “platinum-based”, “based on platinum”, “platinum based”, or “platinum-containing”. However, the most widely used term is “platinum-based”.

What Is Platinum-Based Chemotherapy?

Platinum-based chemotherapy is a type of cancer treatment using drugs that contain platinum-ion compounds.

These drugs treat many types of cancer. They can effectively kill many cancer cells, but can also cause serious adverse effects.

Platinum-Based Chemotherapy in General

The most common platinum-based chemotherapy drugs include:

• Cisplatin: The first platinum-based chemotherapy drug, developed and approved for cancer treatment in 1978. It is used for testicular, ovarian, bladder, lung, and many other cancers.
• Carboplatin: A modified version of cisplatin with a similar mechanism but fewer adverse effects. It is used to treat ovarian, lung, and other cancers.
• Oxaliplatin: Usually used with other drugs for colorectal (colon and rectal) cancer.

The Most Common Platinum-Based Chemotherapy Regimens

Platinum drugs are usually combined with other chemotherapy medicines. Some commonly used regimens include:

• BEP: A testicular cancer regimen containing bleomycin, etoposide, and cisplatin.
• FOLFOX: A colorectal cancer regimen containing folinic acid (leucovorin), 5-fluorouracil, and oxaliplatin.
• Carboplatin and Paclitaxel: A combination frequently used for ovarian cancer.
• Cisplatin and Pemetrexed: Commonly used for the adenocarcinoma subtype of lung cancer.

Oncologists generally administer chemotherapy intravenously, through injections into a vein. It is often combined with other advanced treatments, such as radiation therapy or targeted therapies. The regimen is tailored to the cancer type, its current stage, the patient's overall health, and various other factors.

How Platinum-Based Chemotherapy Works

Platinum-based chemotherapy works in rapidly dividing cells, including cancer cells, by targeting and interfering with DNA. The drugs form chemical bonds with cellular DNA, causing structural changes and damage. This disrupts cell division and prevents cells from producing more cancer cells. DNA damage also triggers apoptosis, programmed cell death. By inducing apoptosis in cancer cells, the drugs help eliminate cancerous tissue.

Studies over the last decade have found that platinum-based chemotherapy drugs, particularly oxaliplatin, cause immunogenic cell death (ICD). This process kills cancer cells and encourages the immune system to recognize and attack them, increasing the body's ability to eliminate cancer.

How Effective Is Platinum-Based Chemotherapy?

Experts worldwide have clinically endorsed platinum-based chemotherapy drugs as first-choice cancer medicines.

The cancers they can treat include:

• Lymphoma
• Testicular cancer
• Breast cancer
• Ovarian cancer
• Head and neck cancer
• Lung cancer
• Cervical cancer
• Sarcomas

Although many patients initially respond well to cisplatin, some later relapse and develop resistance, reducing its overall effectiveness. Carboplatin shows a similar tendency for resistance to develop. By contrast, third-generation oxaliplatin is less likely to encounter resistance, but has not shown efficacy across as broad a range of cancers as other platinum drugs.

Adverse Effects of Platinum-Based Chemotherapy

While primarily targeting rapidly dividing cancer cells, platinum chemotherapy can also affect healthy cells with high division rates. This helps explain why adverse effects often involve bone marrow, the digestive system, and hair follicles.

Common adverse effects may include:

• Nausea
• Vomiting
• Diarrhea
• Hair loss
• Loss of taste
• Hiccups
• Dark urine
• Dry mouth
• Reduced sweating
• Thirst
• Dry skin

What Should Patients Expect from Platinum-Based Chemotherapy?

Platinum chemotherapy drugs are generally given intravenously (IV) or by injection. They may be delivered quickly into a vein through a catheter using a syringe, or as a prepared drug solution flowing from a plastic bag through tubing connected to a catheter, over minutes to hours.

People who need long-term chemotherapy may benefit from a device called a central venous catheter (CVC, port catheter). A port catheter is placed in a large vein in the chest or arm and remains throughout treatment. This type of IV access allows medication delivery without repeated needle insertions.

Platinum-Based Chemotherapy in Summary

Platinum chemotherapy drugs contain platinum compounds used to treat various cancers. They target rapidly dividing cancer cells, interfering with their DNA and causing cell death. We commonly use them for testicular, ovarian, bladder, and lung cancers, among others. Their effectiveness varies with the cancer type, stage, and patient's overall condition, but they can be powerful tools for shrinking tumors and inducing remission (disease regression).

These medicines are given intravenously and may cause adverse effects such as nausea, vomiting, and hair loss. Close monitoring, adequate information, and supportive care are essential to manage these effects and achieve the best possible outcomes for patients receiving platinum chemotherapy.