Cytogenetics and Cancer Research

Anti-angiogenic therapy is a kind of cancer treatment that using drugs to stop tumor angiogenesis. This is a high potential approach to treat cancer. Today, I will share some of the basic knowledge about this kind of cancer treatment.
 
What is angiogenesis? Angiogenesis is a multi steps process involving the growth of new blood vessels in our body. This process depends on the regulation of many distinct activities in many cell types. This process plays an essential role in many physiological and pathological conditions.
 

What is tumor angiogenesis? Tumor angiogenesis is the growth of new capillary blood vessels that penetrate into tumor and supply the nutrients and oxygen as well as removing waste products. The tumors need angiogenesis to grow and evade in our body. The tumor cells can get the necessary oxygen and nutrient supplies by passive diffusion when the tumor angiogenesis occur. Therefore, the anti-angiogenic therapy is a good approach to treat the tumor progression by stopping the tumor angiogenesis.
 

Anti-angiogenic Therapy is Effective to Treat Cancer

Anti-angiogenic therapy of cancer is a highly effective way for destroying the tumor cells. The tumors cannot grow and survive without angiogenesis. If the anti-angiogenic agents are applied before a tumor develops, it can be considered as a vaccine in preventing the tumor development. Yet, it is not a cure for cancer but just represents the treatment. If we really want to cure the cancer, we need to target the agents and pathways that cause cancer.
 

Advantages of Anti-angiogenic Therapy

i. Unlike the chemotherapy, anti-angiogenic therapy contains little or no toxic to our body. It is because it does not require the therapeutic drug enter any tumor cells. The therapeutic agent needs not to cross the blood brain barrier.
 
ii. This treatment regulate the tumor growth regardless the growth fraction, tumor cell heterogeneity and tumor cell type.
 
iii. This treatment does not induce acquired drug resistance.
 
iv. As the normal vasculature of an adult is dormant, the specificity of angiogenic inhibitors can be applied. This allows the long-term and nontoxic treatment of tumors to the patients. This is the greatest advantage if compare to the nonspecific modalities of chemotherapy and radiation therapy to treat cancer.
 
v. Anti-angiogenic agents aim not only DNA synthesis and cell division, but also the biologic feature of tumor cells.
 
In conclusion, anti-angiongenic therapy has a great potential on treating the cancer and control the progression of tumor cells. Yet, there are some difficulties related to the clinical evaluation of the efficiency of these anti-angiogenic drugs. Sometimes, the therapy might works on the animal model but not in human. The cancer research on this therapy will be carried on to bring its potency into play.

Cancer prevention is a popular topic that people wish me to write more in my Cytogenetics and Cancer Research blog. Cancer prevention is the best possible way to reduce the death rate of cancer worldwide. According to Fundamentals of Cancer Prevention, written by David S. A. and Lisa M. H., cancer prevention research can be divided to 3 approaches to target different aspects in order to reduce cancer morbidity and mortality: Primary, Secondary and Tertiary prevention.
 

Primary Cancer Prevention

Primary cancer prevention is an approach to reduce the impact of carcinogens. We can do this through administration of a chemopreventive agent or remove the environmental carcinogens. The main aim of primary prevention is to prevent a cancer from the very beginning to the developing by reducing individual risk.

 
There are many primary cancer prevention methods which include the lifestyle modification or interventions that modify risk. These methods will become more effective if those cancers in which causes are known.
 
Below are some of the factors that can help to reduce overall cancer incidence:

i. Minimize the exposure to carcinogens. For example, we should avoid from consuming tobacco which contains carcinogen.
 
ii. Dietary modification. For example, we should take balanced meal and reduce the consuming of salt, sugar and high cholesterol foods.
 
iii. Increasing physical activity. For example, we should do some exercises during our daily life like jogging, swimming and so on to keep our body fit.
 
As we all know, unhealthy diet and tobacco use are the leading risk factors for cancer. Smoking cessation is the best way to avoid ourselves from cancer developing. Benefis of quitting smoking begin within the first year of stopping and continue to increase. If you wish to know more about the benefits of smoking cessation, you may read the 15 Benefits of Smoking Cessation. In addition, the role of diet, nutrition and maintaining a healthy body weight is critical to lessen the cancer risk.
 

Secondary Cancer Prevention

Secondary cancer prevention is an approach to detect the abnormal changes at the beginning of the development of malignancy. It involves screening and early detection methods like mammogram, pap test and so on. This can help us to identify any abnormal changes of our body before they become cancerous. Therefore, it is effective to prevent cancer from fully developing. Sometimes, secondary cancer prevention can involve the treatment of precancerous lesions in an attempt to reverse carcinogenesis so that the lesion can regress.
 

Tertiary Cancer Prevention

Tertiary cancer prevention is an approach to control the cancer and prevention of disease-related complications. It involves a variety of aspects of patient care such as quality of life, adjuvant therapies, surgical intervention and palliative care.
 
In conclusion, we can see that the primary cancer prevention is the main role of cancer prevention. Unfortunately, the primary prevention research and efforts are largely underfunded. This lack of prioritization cause the delays in improving and delivering early detection and prevention methods that can save millions of lives.
 

Do you know any methods of cancer prevention? Come and share with us! Prevention is always better than cure!