Efficacy and Safety of Long-Acting GnRH Analogues in Advanced Prostatic Carcinoma

The prostate is a small walnut-shaped gland present in men and responsible for producing seminal fluids. Commonly, 1 in 8 men often develop prostate cancer, but the severity will vary as age and disease progresses. Prostate cancer can develop and spread to other parts of the body. Advanced prostate carcinoma is the last stage of prostate cancer.

Advanced Prostate Carcinoma

The cancer cells in the prostate glands multiply and spread cancer cells from the prostate to other parts of the body, including areas like tissues around the prostate, seminal vesicles, organs such as the liver, lungs, and even bones sign that the disease has reached the advanced stage. It is also called metastatic prostate cancer. One sign of relief about advanced prostate cancer is that the progression to the advanced stage is rare if it is detected early and treated promptly. 

Symptoms

People who develop advanced prostate cancer can experience the following symptoms symptoms: 

• Frequent urge to urinate, especially at night

• Reduced urine flow and decreased output

• Dysuria

• Painful ejaculation 

• Erectile dysfunction

• Blood in semen

• Loss of bladder control

As the cancer cells have already spread to various parts of the body, people can also experience pain in bones, hip joints, and chest.

Treating advanced prostate carcinoma

Effective treatment aims to focus on reducing the rate of cancer progression and eliminating the tumour cells. Effective treatment often involves combinational approaches of various medication therapies, which include hormonal therapy, immunotherapy, chemotherapy, targeted therapy, radiation therapy, bone-targeted therapies, and surgery. 

Hormonal therapy for metastatic prostate cancer

The male reproductive hormone that is vital for the development and spread of cancer cells in the prostate is testosterone. The ultimate aim of this hormonal therapy lies in blocking or lowering the amount of testosterone that fuels the growth and spread of cancer cells. A few types of hormonal therapy agents inhibit the production of male hormones vital for the growth of cancer cells.

There are three types of hormonal therapy agents.

• Luteinizing hormone-releasing hormone agonists (LHRH agonists or LH blockers)

• Gonadotropin-releasing hormone analogues or GnRH blocker

• Androgen receptor blockers

Some of the medications of these classes are used in the effective management of advanced prostatic cancer, including buserelin, leuprorelin, triptorelin, degarelix, flutamide, darolutamide, etc.

GnRH Analogues in Advanced Prostatic Carcinoma

Mechanism of action: Gonadotropin-releasing hormone agonists work by reducing the production of luteinizing hormones and inhibiting androgens. Gonadotropin-releasing hormone antagonists prevent the reversible production of Luteinizing hormone and follicle-stimulating hormone. This collective functioning of these analogs results in the inhibitory effects of testosterone. 

These anticancer medicines are a well-established form of treatment in androgen deprivation therapy for its efficacy and safety. 

Efficacy and safety

They are very effective in suppressing the testosterone hormone, thereby preventing tumor growth. Androgen deprivation therapy paired with GnRH analog medications helps to reduce the size of the tumor and its activity. They are widely used for their activity in reducing the symptoms where they have progressed to the level of bone pain.

These analogs are almost compatible with other therapies and treatment procedures like chemotherapy and surgical castration.

These analogues are well tolerated over a period of time. They can be safely administered at regular intervals. However, it may produce some side effects like rashes, hot flashes, and fatigue, which are often manageable. One of the concerns to keep in mind is that these agents are associated with the risk of developing osteoporosis on a long-term basis. Routine monitoring of vitamin D and calcium levels becomes essential. It also changes the mood and decreases libido, resulting in varied psychological changes.

Conclusion

Advanced prostatic cancer is effectively treated; however, it is vital to weigh the potential benefits these hormonal therapies can have against the side effects they tend to impart on physical health over a period of time. Individualized treatment decisions by a healthcare professional must be followed to improve the quality of life in patients.