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Breakthroughs in Cancer Vaccines: Paving the Way for Targeted Treatment - Dr Tushar Patil

Dr Tushar PatilWritten by Dr Tushar Patil Published On 2024-03-11T15:07:29+05:30  |  Updated On 11 March 2024 3:07 PM IST
Breakthroughs in Cancer Vaccines: Paving the Way for Targeted Treatment - Dr Tushar Patil
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Vaccines have been a centrepiece in preventing and combating diseases caused by various bacteria or viruses. However, the difficult to find nature of cancer cells, which closely resemble normal cells, has posed a challenge in developing effective cancer vaccines.

Nonetheless, ongoing research in medical institutions worldwide is dedicated to overcoming these hurdles and devising efficient vaccines for cancer-related diseases.

Presently, Human papillomavirus vaccines (HPV) and the Hepatitis B vaccine stand out as primary tools in preventing viruses that can lead to cancer. These vaccines play a crucial role in disease prevention, yet the focus is expanding to include a broader spectrum of cancers.

Understanding Cancer Development

Cancer cells, characterized by uncontrolled growth, can manifest in any part of the body. Ordinarily, cells grow, divide, and are replaced in a controlled manner. In the case of cancer, damaged cells resist death, leading to rapid, unchecked growth that forms tumours. These cancer cells can travel through the bloodstream, forming new tumours in different areas of the body.

Types of Cancer

Cancer is categorized based on its origin within the body. Some notable types include Leukaemia (bone marrow), Melanoma (melanin cells), Sarcoma (bone and soft tissue), Carcinoma (cells), Multiple Myeloma (plasma cells), Spinal Cord and Brain Tumours, and Lymphoma (lymphocytes).

Treatments and Vaccines

Vaccines work by enhancing the immune system's ability to naturally combat diseases. However, developing cancer vaccines is complex due to the similarity between cancer and normal cells, as well as the unique nature of each individual's tumour. Various types of vaccines are utilized in the prevention and treatment of cancerous diseases.

1. Preventive Vaccines - Several preventive cancer vaccines, including Gardasil, Cervarix, HBC, HEPLISAV, and Gardasil-9, aim to protect against specific types of cancers.

2. Personalized Vaccines - Personalized vaccines, currently undergoing Phase II and Phase III trials, are designed to target an individual's specific cancer cells.

3. Therapeutic Vaccines - Therapeutic vaccines, such as Sipuleucel-T and Bacillus Calmette-Guerin (BCG), focus on specific targets within tumours, discerning between normal and cancer cells.

Side Effects of Cancer Vaccines

The side effects of cancer vaccines includes back pain, fatigue, fever, headache, nausea, pain in the joints, neuralgia(sharp nerve pain) and chills. The occurrence and severity of these side effects depend on the type of the vaccine and the patient's health also.

Cancer treatments can induce notable changes in the body, affecting the skin and nails. These changes include dry and itchy skin, photosensitivity, nail infections, swollen cuticles, and nail cracks.

Challenges in Cancer Vaccine Development

The intricacies of cancer biology, coupled with the individualized nature of tumours, present formidable challenges in the development of universal cancer vaccines. The genetic and molecular heterogeneity among different cancers and even within the same type of cancer necessitate precision in vaccine design.

Despite significant progress, the development of powerful cancer vaccines remains an ongoing challenge. While the BCG vaccine stands as a notable achievement, researchers are actively working towards effective personalized vaccines. Positive results have emerged from trials, but a unified vaccine for all cancer types remains elusive.

Personalized Vaccines: A Ray of Hope

Neoantigen or personalized vaccines represent a potential direction in cancer vaccine research. These vaccinations, which target certain antigens exclusive to each patient's tumours, are made from the patient's own cancer cells. The goal is to activate the patient's immune system so that it can identify and combat these neoantigen, therefore destroying the cancer cells.

Personalized vaccinations are now in phase II and phase III studies, and the results have been hopeful for several cancer types. Rethinking cancer therapy by customizing vaccinations based on the genetic composition of individual patients' cancers signifies a paradigm shift away from one-size-fits-all methods.

Overcoming Immunological Challenges

Cancer cells employ various mechanisms to evade detection by the immune system. Tumour cells can downregulate immune responses or create an immunosuppressive microenvironment, hindering the effectiveness of traditional vaccines.

Researchers are exploring innovative strategies to overcome these immunological challenges, including combination therapies and immune checkpoint inhibitors.

Combination Therapies: Synergy in Action

The future of cancer vaccines might lie in combining them with other treatment modalities. Combination therapies, incorporating vaccines alongside traditional treatments like chemotherapy or targeted therapies, aim to enhance overall treatment efficacy.

By engaging the immune system while simultaneously targeting cancer cells through other mechanisms, these approaches seek to create a synergistic effect for more robust and comprehensive cancer treatment.

The Road Ahead: Toward Precision Medicine

As we continue to explore the intricacies of cancer biology, the concept of precision medicine becomes increasingly apparent. Customizing medical treatments, such as vaccinations, to a patient's unique needs is known as precision medicine.

A more customized approach to cancer treatment is being made possible by developments in genomics and molecular profiling, which is moving us closer to the development of efficient and focused cancer vaccines for the treatment.

The coming years are anticipated to yield substantial developments in cancer vaccine research and application, with a focus on targeting shared neoantigen, treating diverse tumour types, and combining vaccines with other modalities.

Notably, advancements such as Moderna and Melanoma Vaccine, BioNTech's Pancreatic Cancer Vaccine, and Transgene's Viral Vector-Based vaccine have emerged as prominent candidates for further exploration in cancer treatment. These innovative approaches are representative of the evolving landscape of cancer vaccines, ushering in a new era of precision medicine and earlier lines of cancer treatment.

In recent studies, the development of hitch-hiking cancer vaccines has shown promising progress in clinical trials. Researchers have been dedicated to enhancing the efficacy of cancer vaccines, aiming to make them more effective in combating cancer. This dedication has led to notable breakthroughs in the realm of cancer immunotherapy and personalized cancer treatment, offering a glimmer of hope for patients and medical professionals alike.

The ongoing research reflects a concerted effort to broaden the reach of cancer vaccines, potentially revolutionizing the approach to cancer treatment in the future. With the exploration of shared neo-antigens and the pursuit of more effective and diverse tumour targeting, the landscape of cancer vaccine development is poised to undergo significant transformation in the foreseeable future.

As the field continues to evolve, the collaboration between industry leaders, healthcare professionals, and researchers remains crucial in driving progress and bringing innovative cancer vaccines to the forefront of medical care.

Disclaimer: The views expressed in this article are of the author and not of Medical Dialogues. The Editorial/Content team of Medical Dialogues has not contributed to the writing/editing/packaging of this article.
cancer vaccinevaccinationcancerbreakthrough in cancer vaccinescancer vaccine developmentdr tushar patil
Dr Tushar Patil
Dr Tushar Patil

    Dr Tushar Patil MBBS, DM (Medical Oncology), MD (General Medicine) is a Senior Consultant Medical Oncologist at Sahyadri Super Speciality Hospital, Pune having over 19 years of experience in the field of Oncology. His extensive experience includes significant contributions to basic medical research and the conduct of numerous clinical trials. Dr. Patil specializes in various realms of medical oncology, including Hematology, pediatric oncology, and hematopoietic stem cell transplant, showcasing a comprehensive skill set that has earned him a stellar reputation in Pune's medical community.

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