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Cancer Cure: Inching Towards The ‘Holy Grail’?

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In a Press Conference on August 20, 2015, the 39th President of the United States, now 90-year-old  Jimmy Carter, revealed (video) that during a liver surgery earlier this month the doctors diagnosed that he has cancer. The type of cancer that he is suffering from is called melanoma, which has already spread to his liver and brain. Medical jargon would term it as deadly metastatic cancer.

Though the surgeons have removed the liver tumor, and well-targeted radiation treatment for four other small tumors in his brain has already been initiated, the original site of the melanoma, the lethal skin cancer, has reportedly not been found, as yet.

Mr. Carter’s medical treatment has started with an infusion of a new class of drug that uses the human immune system to fight cancer cells. The drug has been reported to work not only in advanced metastatic cancer, but also in the old age of patients. The former American President appears optimistic about the treatment outcomes with this new therapy, ‘placing his fate in the hands of God’, though initially he thought that he had just weeks to live.

I shall deliberate in this article, in an easy to understand language, though briefly, the promises offered by two latest options for cancer cure. One of these two, has just become available to patients and the other one, after an initial jaw-dropping success, is undergoing further tests in a renowned research laboratory of the United States.

Two novel pathways for cancer treatment:

Until recently, surgery, radiation and chemotherapy used to be the three common options for cancer treatment. One breakthrough option has just been launched and more in the offing.

In search of a cure for cancer, pathbreaking outcomes of medical research, especially in the following two areas, are significant:

A. Immunotherapy: It is a revolutionary approach to cancer treatment. The first of this novel class of drugs has just come to the market, with which Mr.Jimmy Carter is now reportedly being treated.

B. Re-programming cancer cells back to normal: Success has just been achieved in laboratory studies with this technique. It holds a strong promise to cure cancer, universally.

A. Immunotherapy:

On June 1, 2015, in an article titled, ‘Cure for terminal cancer’ found in game-changing drugs, “The Telegraph” – well-regarded international news daily, reported on anti-cancer immunotherapy drugs, as follows:

“Terminally ill cancer patients have been ‘effectively cured’ by a game-changing new class of drugs. In one trial, more than half of patients who had just months to live saw deadly tumors shrink or completely disappear.”

“In recent days, the results of trials of a number of treatments which harness the body’s immune system have been announced at the American Society of Clinical Oncology’s annual conference in Chicago. They show promise in the fight against skin cancer and lung disease.”

As we know, most of the cancers are deadly. All these grow and spread, as they manage to hide from the immune system, disguising the life-threatening danger. Thus, medical research scientists pondered that the human immune system could play a critical role in the fight against cancer and even cure, by harnessing its ability to fight the deadly disease, effectively and decisively.

To achieve this goal, this class of new cancer drugs work by allowing the body to recognize and attack cancer as any other harmful invader to the body. It effectively blocks a cellular pathway that hinders the ability of the human immune system to attack cancer cells.

At present, to treat different types of cancer, more number of immunotherapy drugs are undergoing clinical investigations.

Brilliant treatment outcomes, but not universal:

It has been reported, about one third of patients taking immunotherapy for the treatment of cancer experienced positive results. Those who responded to this therapy, showed immediate effect with their tumors shrinking or vanishing in a matter of weeks. As a result, the patients who had no more than weeks or months to live, just as former US President Jimmy Carter, have gone into remission for years and continuing with their normal lives.

It has also been reported, otherwise such patients could expect to live just nine months, if given standard treatment of cancer. Researchers said, they were hopeful that half of the patients responded to immunotherapy would end up “living disease-free”.

These drugs are expensive, costing roughly US$150,000 per year, which is a part of a different debate altogether.

Not a ‘magic bullet’:

Besides its high cost and outstanding quality of results, it is worth noting that immunotherapy is not a ‘magic bullet’ for all types of patients and in all cancer. It, therefore, throws a challenge for the oncologists to understand, why immunotherapy benefits only to some cancer patients, and who are those patients?

Moreover, there is a possibility of immunotherapy sending immune system of some patients to overdrive, precipitating auto-immune disorder that may attack also the healthy cells.

Thus, immunotherapy is not the ‘Holy Grail’ for the treatment of cancer, neither it is nowhere near a perfect drug for the treatment of all types of cancers in all patients.

Two key findings:

In this regard, two key findings of the researchers on immunotherapy are as follows:

  • Roughly around 15 to 20 percent of patients could experience shrinkage or remission of cancer
  • Half of the patients who responded found it lasting for at least six months

Thus, immunotherapy can at best be a cure for only some terminally ill cancer patients, mostly for some time, but not for all.

“In the hands of God”:

All these factors on immunotherapy probably would help us to understand, why an erudite person like Mr. Jimmy Carter said, though optimistic about the new treatment, he is placing his fate ‘in the hands of God’.

B. Re-programming cancer cells back to normal: 

The question, therefore, comes up now, if immunotherapy is not the ‘Holy Grail’ for cancer treatment that the research scientists have been intensively searching for, is there anything else coming up for cancer cure?

It appears so. A totally different approach to re-program the cancer cells back to normal has very recently been reported by Mayo Clinic’s Florida Campus in the United States. With this, cancer researchers’ dream of making the tumor cells morphing back to normal cells, they once were, would probably come true.

The research findings, published in Nature Cell Biology on August 24, 2015, represents ‘an unexpected new biology that provides the code, the software for turning off cancer,’ said the senior investigator of this study.

In the normal process, cells in the human body divide constantly to replace themselves and stop dividing when they have replicated sufficiently. However, unlike the normal cells, cancer cells do not stop dividing, they go out of control, leading to huge cell reproduction and tumor growth.

For the ultimate cure of cancer, scientists at Mayo Clinic have now reportedly succeeded in reversing the process responsible for the normal cells from replicating too quickly.

Possible cure now within sight?

This could ultimately lead to a newer class of breakthrough treatment that would be able to reverse cancerous growth in the human body, possibly curing cancer, without the need of surgery, chemotherapy, radiation or even immunotherapy.

Scientists at the Mayo Clinic have said that their initial experiments in some aggressive types of cancer are quite encouraging. They have successfully done this in very aggressive human cell lines from breast and bladder cancer.

Towards the ‘Holy Grail’:

In pursuit of finding a cancer cure, research scientists have been making commendable progress, over a period of time.

In the last few years, spectacular breakthroughs in treatment of cancer have been possible from the increasing genetic and biological understanding of the researchers, especially in ascertaining exact defects in the DNA code of human genes that cause cancer.

Ability to sequencing human genome has offered a key tool to the researchers to compare the DNA codes of cancerous and normal cells and identify the differences.

From within the 20,000 human genes, around 500 cancer genes have been reportedly discovered and are being catalogued. Clear understanding of what happens precisely when the cells divide uncontrollably and cancer spreads in different parts of the patients’ body, is taking place with commendable progress of various research initiatives in this area.

Based on the current knowledge on human genome, a number of new drugs have been and are being developed to target the cancer-causing genes with great accuracy. Such types of drugs are called ‘personalized medicines’, as these act on specific gene abnormality of patients related to certain types of cancer. Sophisticated laboratory tests facilitate treatment with ‘personalized medicines’. These are more effective with lesser side-effects, as compared to generally used anti-cancer drugs, prescribed to all cancer patients.

However, the question keeps lingering, ‘Is the Holy Grail for cancer cure has now come within sight?’

Conclusion:

Medical scientists continue to take rapid strides towards better and more effective treatment for cancer, if not cure, with fewer side-effects.

Claims for long remissions with immunotherapy, are being reported for some patients with even metastatic cancer and also in old age, just like former President of America – Mr. Jimmy Carter.

The success achieved by the scientists of ‘Mayo Clinic’ in re-programming rogue cancer cells back to normal, is stunning.

Being successful in this effort, the researchers have compared cancer with a complex software program of life. When it goes out of control, ‘instead of the code for normal cells, a code for making abnormal cells is executed’. This new study signals a strong possibility of bringing the cancer cells back to normal.

Medical experts keep their fingers crossed. Although, some of them do apprehend that there may never be a single ‘Magic Bullet’ to cure all types of cancer in all patients. This is mainly because cancer involves a large number of different disease areas, such as, breast, lung, bowel, prostate, blood and so on.

But hope refuses to fade out, as science continues to keep unravelling spectacular breakthroughs in this direction, at a fairly brisk pace. All these researches may be cancer types or patient types specifics, but the progress is taking place in the right direction.

Even in the ‘Mayo Clinic study’, scientists have been, so far, successful in re-programming the breast and bladder cancer cells back to normal, though they believe that this success sends a strong signal of an “early and somewhat universal event in cancer.”

Immunotherapy is undoubtedly a path breaking step that ensures cure in some types of cancer and in some categories of patients. However, if re-programming the cancer cells back to normal, eventually becomes an ‘universal event’ in the treatment of this generally frightening disease, no doubt, the medical science is now slowly but surely inching towards the ‘Holy Grail’ for cancer cure…at long last.

By: Tapan J. Ray

Disclaimer: The views/opinions expressed in this article are entirely my own, written in my individual and personal capacity. I do not represent any other person or organization for this opinion.

A Disruptive Innovation in Healthcare – Personalized Medicines

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Tufts Center for the Study of Drug Development (Tufts University) in its publication named ‘Impact Report’, November/December 2010 articulated, “Biopharmaceutical companies are committed to researching and developing personalized medicines and within their development pipelines, 12%-50% of compounds are personalized medicines.”

Thus the disruptive innovation process towards ‘Personalized Medicines’ have already begun. Over a period of time ‘Personalized Medicines’ will be targeted to the biological/genomic profile of an individual to significantly improve the quality of healthcare to the patients.

This paradigm shift in the healthcare space would prompt similar changes in various disease diagnostic technologies, which will not only be able to detect a disease well before the appearance of symptoms, but would also  indicate which patients will best respond to or be adversely affected by which medications.

‘Personalized Medicines’ will in that process ensure a critical shift from the disease oriented treatment to a patient oriented treatment, which can be initiated much before the clinical manifestations of a disease are detected.

The technological march towards this direction is indeed risky and arduous one. However, the benefits that the humanity will accrue out of this disruptive innovation will far outweigh the risks in all forms.

Personalized Medicines:

Rapid strides in pharmacogenomics bring in a promise of radically different ways of treating diseases, as major pharmaceutical companies of the world make progress in developing much more effective medicines designed to target smaller populations.

The above ‘Impact Report’ defines Personalized Medicines as:

“Tailoring of medical treatment and delivery of health care to the individual characteristics of each patient—including their genetic, molecular, imaging and other personal determinants. Using this approach has the potential to speed accurate diagnosis, decrease side effects, and increase the likelihood that a medicine will work for an individual patient.”

‘Personalized Medicines’ are expected to be an effective alternative to quite unwieldy current ‘blockbuster drugs’ business model.

What is then the aim of ‘Personalized Medicines’?
The aim of ‘personalized medicines’ is, therefore, to make a perfect fit between the drug and the patient. It is worth noting that genotyping is currently not a part of clinically accepted routine. However, it is expected to acquire this status in the western world, very shortly.

Some interesting recent developments:

  1. The Economist, March 12-18, 2011 in its article titled “Toward the 15-minute genome” reported that ‘nanopore sequencing’ of human genome is now gaining momentum. This could make sequencing of entire genomes of cancerous and healthy cells possible to accurately point out what has exactly changed in individual patients, enabling the oncologists to determine patient specific drugs for best possible results in each case, separately.
  2. New cancer marker has been reported to aid earlier detection of the disease, where repetitive stretches of RNA are found in high concentrations in cancer cells.
  3. A new blood test will accurately detect early cancer of all types with an accuracy of greater than 95%, when repeated the accuracy will even be even greater than 99%.
  4. ‘Breast On A Chip’ will test nano-medical detection and treatment options for breast cancer
  5. A brain scan will detect the telltale “amyloid plaques,” the protein fragments that accumulate between nerves in Alzheimer’s disease

In what way ‘Personalized Medicines’ will be different?

With ‘Personalized Medicines’ the health of a patient will be managed based on personal characteristics of the individual, including height, weight, diet, age, sex etc. instead of defined “standards of care”, based on averaging response across a patient group. Pharmacogenomics tests like, sequencing of human genome will determine a patient’s likely response to such drugs.
These are expected to offer more targeted and effective treatment with safer drugs, and presumably at a lesser cost. Such medicines will also help identify individuals prone to serious ailments like, diabetes, cardiovascular diseases and cancer and help physicians to take appropriate preventive measures, simultaneously. ‘Personalized medicines’ in that process will focus on what makes each patient so unique, instead of going by the generalities of a disease.
To give a quick example, genetic differences within individuals determine how their bodies react to drugs such as Warfarin, a blood thinner taken to prevent clotting. It is of utmost importance to get the dosing right, as more of the drug will cause bleeding and less of it will not have any therapeutic effect.
‘Personalized medicines’, therefore, have the potential to bring in a revolutionary change the way patients are offered treatment by the medical profession. Genomic research will enable physicians to use a patient’s genetic code to arrive at how each patient will respond to different types of treatments.
In the field of cancer, genetic tests are currently being done by many oncologists to determine which patients will be benefitted most, say by Herceptin, in the treatment of breast cancer.
Expected benefits from ‘Personalized Medicines’:

The expected benefits from the ‘Personalized Medicines’, besides very early diagnosis as stated above, are the following:
1. More Accurate dosing: Instead of dose being decided based on age and body weight of the patients, the physicians may decide and adjust the dose of the medicines based on the genetic profiling of the patients.
2. More Targeted Drugs: It will be possible for the pharmaceutical companies to develop and market drugs for patients with specific genetic profiles. In that process, a drug needs to be tested only on those who are likely to derive benefits from it. This in turn will be able to effectively tailor clinical trials, expediting the process of market launch of these drugs.
3. Improved Health care: ‘Personalized Medicines’ will enable the physicians to prescribe ‘the right dose of the right medicine the first time for everyone’. This would give rise to much better overall healthcare.
Role of Pharmaceutical and Biotech companies:
Many research based pharmaceutical and biotechnology companies have taken a leading role towards development of ‘personalized medicines’ in line with their key role as healthcare enterprises. India is also taking keen interest in this science.
Some important issues:
However, there are some ethical and social issues in the development of ‘personalized medicines’ primarily in the area of genetic testing and consideration of race in the development of such medicines, which need to be effectively addressed, sooner.
Can it replace the ‘Blockbuster Drugs’ business model?
Realization of deficiencies in the economics of ‘block buster drugs’ R&D business model has made ‘personalized medicines’ a reality today.
Better efficacy and safety profile of ‘personalized medicines’ will prove to be cost-effective in the overall healthcare systems. Smaller and exclusive markets for ‘personalized medicines’ are also expected to be quite profitable for the pharmaceutical companies. However, such smaller segmentation of the market may not leave enough space for the conventional ‘blockbuster model’, which is the prime mover of the global pharmaceutical industry, even today.
Reports indicate that some renowned global pharmaceutical companies like, Roche, AstraZeneca, GlaxoSmithKline are making good progress towards this direction through collaborative initiatives.
Approximate cost of ‘Genome Sequencing’:
When human genome was first sequenced, the reported cost was staggering U.S$ 3 billion. However, with the advancement of technology, it came down to U.S$ 1 million, last year. Currently, the cost has further come down to U.S$ 60,000. With the rapid stride made in the field of biotechnology, combined with the economies of scale, cost of such genetic tests is expected to be around U.S$ 1,000 in near future, making it possible for people to obtain the blue print of their genetic code.
Savings on cost of Clinical trials with ‘Personalized Medicines’:
Genome sequencing will help identifying a patient population, which will be far more likely to respond positively to the new treatment. In that process, if it reduces costs of clinical trial by even 5%, expected net savings for the industry towards clinical trial have been reported to be around U.S$ 5 billion.
With ‘personalized medicines’ the innovator companies will be able to significantly reduce both time, costs and the risks involved in obtaining regulatory approvals and penetrating new markets with simultaneous development of necessary diagnostic tests. Such tests will be able to identify patients group who will not only be most likely to be benefitted from such medicines, but also will be least likely to suffer from adverse drug reactions.
Therefore, considerable cost advantages coupled with much lesser risks of failure and significant reduction in the lead time for clinical trials are expected to make ‘personalized medicines’ much more cost effective, compared to conventional ‘blockbuster drugs’.
Innovative and cost effective way to market ‘Personalized Medicines’:
With ‘personalized medicines’ the ball game of marketing pharmaceuticals is expected to undergo a paradigm shift. Roche’s model of combining necessary diagnostic tests with new drugs will play a very important role in the new paradigm.
Roche is ensuring that with accompanying required diagnostic tests, the new oncology products developed at Genentech can be precisely matched to patients.
Can ‘Personalized Medicines’ be used in ‘Primary Care’ also?
To use ‘personalized medicines’ in a ‘primary care’ situation, currently there is no successful model. However, it has been reported that in states like, Wisconsin in the U.S, initiative to integrate genomic medicines with ‘primary care’ has already been undertaken. Scaling-up operations of such pilot projects will give a big boost to revolutionize the use of ‘personalized medicines’ for precision and targeted treatment of the ailing population.

Conclusion:

In my view, there does not seem to be any possibility of looking back now. The robust business model of ‘personalized medicines’, will now be the way forward, as much to the industry as to the patients. It is a win-win game.

Disclaimer: The views/opinions expressed in this article are entirely my own, written in my individual and personal capacity. I do not represent any other person or organization for this opinion.