NSAID against cancer

What is NSAID

NSAIDs (non-steroidal anti-inflammatory drugs) are a group of medications frequently used to relieve pain, fever, and inflammation. Examples of NSAIDs include:

Ibuprofen
Diclofenac
Naproxen

They are effective in treating many common ailments. However, these substances have now also been shown to play a role in cancer treatment.

Significance of NSAIDs in cancer treatment

In recent years, researchers have discovered that NSAIDs can have a range of positive effects on cancer cells. These effects include:

Inhibition of tumor growth

NSAIDs can also inhibit the production of prostaglandins, which are involved in cell growth and division. By reducing the production of prostaglandins, NSAIDs can potentially slow the growth of cancer cells.

Induction of cell death

Some NSAIDs can directly induce programmed cell death (apoptosis) in cancer cells.

Reduction of Inflammation

One of the primary mechanisms behind the potential cancer-preventive effect of NSAIDs is their ability to inhibit inflammation. Chronic inflammation is linked to the development of many types of cancer.

Modulation of the immune system

By affecting the immune system, NSAIDs can help the body fight cancer cells more effectively.

The mechanism behind the effect

How exactly do NSAIDs work against cancer?

The short answer is that it is a complex interplay between various biological processes (this is elaborated further down in the text). One of the most important mechanisms is the inhibition of the enzyme cyclooxygenase (COX). COX plays a central role in the production of prostaglandins, which are molecules involved in inflammation and cell growth. By blocking COX, NSAIDs can reduce the production of prostaglandins and thereby inhibit the growth of cancer cells.

Clinical studies and evidence

Several clinical studies have shown promising results regarding the use of NSAIDs in the prevention and treatment of various types of cancer, including: Several studies have suggested a link between regular use of NSAIDs and a lower risk of certain types of cancer, especially colorectal cancer.

Colorectal cancer

There is strong evidence that regular use of NSAIDs can reduce the risk of developing colorectal cancer. Several large epidemiological studies have shown a statistically significant correlation between regular use of NSAIDs and a reduced risk of this type of cancer.

Other types of cancer

Studies have also suggested a possible preventive effect of NSAIDs against other types of cancer, such as esophageal cancer, breast cancer, prostate cancer, and lung cancer.

NSAIDs as adjuvant treatment

NSAIDs are often considered an adjuvant treatment, meaning they are used alongside other conventional cancer treatments, such as surgery, chemotherapy, and radiation therapy. Or they are used in combination with other repurposed drugs.

The combination of NSAIDs with other treatments can potentially increase the overall effect and improve patient outcomes.

Side effects of NSAIDs

These may include:

Mavesår
Blødninger
Nyreproblemer
Hjerteproblemer

It is therefore crucial to speak with your doctor before starting treatment with NSAIDs, especially if you already have issues with any of the above.

Mechanisms of NSAIDs in cancer

(complicated)

As mentioned above, NSAIDs primarily inhibit the enzyme cyclooxygenase (COX). This enzyme plays a central role in the production of prostaglandins, which are signaling molecules involved in a wide range of biological processes, including inflammation, cell growth, and vasodilation. Here are some of the specific molecular mechanisms believed to be involved in the anticancer action of NSAIDs:

Inhibition of tumor angiogenesis

Prostaglandins play a crucial role in the formation of new blood vessels (angiogenesis), which is necessary for tumors to grow. By inhibiting the COX enzyme and thereby reducing prostaglandin production, NSAIDs can limit tumor growth by inhibiting angiogenesis.

Modulation of the cell cycle

NSAIDs can affect the cell cycle, which is the process by which cells grow and divide. By inducing cell cycle arrest, NSAIDs can prevent cancer cells from proliferating (growing or multiplying very quickly and extensively).

Induction of apoptosis

Some NSAIDs can induce programmed cell death (apoptosis) in cancer cells. This occurs by activating specific proteins involved in the apoptotic cascade.

Modulation of the tumor microenvironment

The tumor microenvironment is the local environment surrounding a tumor, and it plays an important role in tumor growth and progression. NSAIDs can affect the tumor microenvironment by reducing inflammation and increasing the immune response against tumor cells.

Interaction with other signaling pathways

In addition to COX inhibition, NSAIDs can also interact with other signaling pathways involved in cancer cell survival and proliferation, such as the NF-κB and Akt pathways (both are signaling pathways in cells that play a central role in the development and spread of cancer).

COX-1 and COX-2

Two different isoforms

There are two main isoforms of the COX enzyme: COX-1 and COX-2. COX-1 is a constitutive enzyme expressed in most cells and is involved in normal physiological processes. COX-2 is an inducible enzyme (an enzyme whose production in a cell can be increased (induced) in response to a specific signal or substance) primarily expressed in inflammatory processes and in cancer cells.

Side effects and challenges

Most conventional NSAIDs inhibit both COX-1 and COX-2, which can lead to side effects such as gastric ulcers and bleeding. The development of selective COX-2 inhibitors (such as celecoxib) was therefore a major advancement, as these drugs were intended to be gentler on the gastrointestinal tract. However, later studies have shown that selective COX-2 inhibitors can also have serious side effects, including an increased risk of heart attack and stroke.

A complex picture

Although significant knowledge has been gained regarding the molecular mechanisms behind the anticancer effect of NSAIDs, many unanswered questions remain. Cancer is a complex disease, and the effect of NSAIDs can vary depending on the tumor type, stage, and the individual patient’s genetic makeup.

Conclusion

NSAIDs represent an exciting area of research within cancer treatment. Although there is still much we do not know, it is clear that these common painkillers have significant potential to improve the treatment of cancer patients. By combining NSAIDs with other therapies, we may one day achieve more effective and gentler treatment for cancer.

If you are in doubt about interactions, they can be checked here:

Drugs.com