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‘Disease Oriented Treatment’ to ‘Patient Oriented Treatment’ – An evolving trend

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The quest for moving away from conventional and error-prone ‘Disease Oriented Treatment’ paving the way for unconventional individual patient-specific ones, may soon come to fruition. Dramatic progress in the research for developing ‘Personalized Medicines’ could soon offer a choice for individual ‘Patient Oriented Treatment’ with precisely predictable efficacy and safety, especially for the treatment of various intractable and dreaded diseases.

Sir John Bell, Professor of Medicine at Oxford University, adviser on genetics to the government and chair of its human genomics strategy group has reportedly said in early December 2012 that ‘Personalized Medicine’ for all could soon be a clear possibility, as everybody will be able to have their entire DNA make-up mapped for as little as £100 (Rs.8, 700 approx.).

This estimate seems to be quite realistic as Sir John said, the price of genome sequencing has fallen by 100,000-fold in 10 years and genetics being a key component of all common diseases, genome sequencing will help immensely in the use of new drugs, as well.

Raising a flag:

While watching the pursuit of excellence by the genetic scientists in the realm of disease treatment, some experts have reportedly been sounding a note of caution. They strongly feel that DNA code sequencing brings to light a “very real privacy concerns” of individuals.

GeneWatch UK, is an organization that investigate how genetic science and technologies will impact on our food, health, agriculture, environment and society. They have been strongly arguing, if genome sequencing is extended to entire population, individuals and their relatives could then be identified and tracked by matching their DNA with the genome stored in the respective health records. This move, as contemplated by them, could “wipe out privacy” with an impact on the society.

Thus, the 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, these thought leaders feel, need to be effectively addressed, sooner.

That said, the Prime Minister of UK Mr David Cameron has reportedly said:

“By unlocking the power of DNA data, the NHS will lead the global race for better tests, better drugs and above all better care. We are turning an important scientific breakthrough into a potentially life-saving reality for NHS patients across the country. If we get this right, we could transform how we diagnose and treat our most complex diseases not only here but across the world, while enabling our best scientists to discover the next wonder drug or breakthrough technology.”

Increasingly more in development pipeline:

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.

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

Experts envisage that over a period of time ‘Personalized Medicines’ will be targeted to biological/genomic profile of a patient or patient types to significantly improve the quality of treatment.

The definition:

The above report defines Personalized Medicines as “Tailoring of medical treatment and delivery of health care to 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.”

Mainly due to all these reasons, ‘Personalized Medicines’ are expected to be an effective alternative to quite unwieldy current ‘blockbuster drug’ business model.

Makes a perfect fit:

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.

Consequent changes and shifts:

This potential 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 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 even 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.

Towards this direction:

  • 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 genome 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.
  • 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.
  • 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%.
  • ‘Breast On A Chip’ will test nano-medical detection and treatment options for breast cancer.
  • A brain scan will detect the telltale “amyloid plaques” ,the protein fragments that accumulate between nerves in Alzheimer’s disease.

A difference that matters:

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.

All these are expected to offer more targeted and effective treatment with much safer drugs, and in all probability at a lesser real 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.

Each patient is unique:

‘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 usher 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 available treatments.

In the field of cancer, genetic tests are currently being done by many oncologists to determine which patients will be benefited most, say by Herceptin, in the treatment of breast cancer.

Indian initiatives:

Some companies, both well known and little known, are making quiet collaborative progress in the genome sequencing area in India, which will ultimately make expensive treatments like cancer more affordable to many.

Other advantages:

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 Healthcare: ‘Personalized Medicines’ will enable the physicians to prescribe ‘the right dose of the right medicine the first time for everyone’ without any trial or error. This would give rise to much better overall healthcare.

Reduced Clinical Trial cost:

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 in real term will be significant.

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 most likely to be benefited 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’.

A sustainable business model:

Realization of deficiencies in the deep-pocket economics of ‘block buster drug R&D business model’ has made ‘personalized medicines’ a reality today. Large number of smaller and exclusive markets for ‘personalized medicines’ is also expected to be quite profitable for the pharmaceutical companies. On the other hand, better efficacy and safety profile of ‘personalized medicines’ will prove to be cost-effective in the overall healthcare systems.

However, 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.

A different marketing ball game:

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 ball game.

Roche is reportedly ensuring that with accompanying required diagnostic tests, the new oncology products developed at Genentech can be precisely matched to patients.

Use in ‘Primary Care’:

Currently there is no widely successful model for use of ‘personalized medicines’ in a ‘primary care’ situation. 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 for the ailing population.

Current Applications:

Though these are still the early days, initial benefits of ‘personalized medicines’ are now being reported in many areas like:

  • Genetic analysis of patients dealing with blood clots: Since 2007, the U.S. Food and Drug Administration has been recommending genotyping for all patients being assessed for therapy involving Warfarin.
  • Colorectal cancer: For colon cancer patients, the biomarker that predicts how a tumor will respond to certain drugs is a protein encoded by the KRAS gene, which can now be determined through a simple test.
  • Breast cancer: Women with breast tumors can now be effectively screened to determine which receptors their tumor cells contain.

Above applications of ‘personalized medicines’ will help saving not only significant expenses, but also precious time, which is usually spent for ‘trial-and-error treatments’. In addition, this approach also helps clinicians to determine quickly which therapies are most likely to succeed.

A truly patient centric treatment approach:

Generally speaking, unlike conventional ‘one size fits all’ type treatment approach, where same medicine with varying efficacy is tried on a large number of patients with equally varying rates of failure, ‘personalized medicines’ in true sense starts with the patients.

This may not necessarily mean unique treatment for each patient every time. With ‘personalized medicine’-based treatment approach, depending on biological, genetic and genomic characteristics, patients can be divided into groups and targeted treatment with specific drugs showing most efficacy and least side-effects can be worked out for each of these groups. Hence ‘personalized medicines’ by all means are truly patient centric.

Conclusion:

One of the key issues today in the realm of conventional ‘Disease Oriented Treatment’ is that lot many drugs do not work on significantly large number of patients with same efficacy and safety standards. ‘Personalized medicines’ will be able to address this issue with right diagnosis, ensuring treatment with the right medicine in right doses for the right type of patients.

Though in Europe and to some extent in the US, ‘Patient Oriented Treatment’ approaches with ‘personalized medicines’ have already been initiated, these are still early days for this novel concept to get translated into reality for wider use.

Lot many grounds may still need to be covered especially in the areas of medical research and also to work out the regulatory pathways for ‘personalized medicines’ in healthcare by the pioneers of this great concept.

That said, the evolving transition from the conventional ‘Disease Oriented Treatment’ to unconventional ‘Patient Oriented Treatment’ seems to be irreversible now.

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 and also do not contribute to any other blog or website with the same article that I post in this website. Any such act of reproducing my articles, which I write in my personal capacity, in other blogs or websites by anyone is unauthorized and prohibited.

 

 

Infections may cause NCDs like, diabetes and cancer: Ongoing scientific quest to decipher the mystery

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To create a positive health impact on the lives of billions of people, the United Nations (UN) on September 19, 2011 unanimously adopted a ‘Political Declaration’ on ‘Non Communicable Diseases (NCDs)’.  In the years ahead, this path-breaking initiative on NCDs, with global commitment, is expected to make a huge difference in the lives of many, across the world.

NCDs have now been identified as a key healthcare challenge of this century and include ailments like, cardiovascular, chronic pulmonary diseases, diabetes, arthritis and cancer. In the developing countries, over 80% of all deaths are related to NCDs.

There are times when NCDs raise issues related to social justice and human rights. For example, in a country like India where out of pocket expenses towards healthcare is around 80%, a major illness like cancer even in a middle income group family, can drive the entire household to huge socioeconomic hardship.

NCDs are preventable:

According to the World Health Organization (WHO), adequate physical activity, healthy diet/nutrition and tobacco avoidance can prevent:

  • 80% of premature heart disease
  • 80% of type II diabetes
  • 40% of cancers

Currently, as we shall see below, immunization is also being considered as a preventive therapy for certain types of NCDs.

NCDs may be of infectious origin:

Dr. Bennett Lorber in his article titled, ‘Are All Diseases Infectious?’, published in the ‘Annals of Internal medicine’ wrote that many common NCDs like, cardiovascular, diabetes, peptic ulcer, arthritis and even certain types of cancer originate from infections by micro-organisms.

Mainly because of this reason and its consequent adverse socioeconomic impact, the low and middle income countries of the world will require controlling many types of infections, possibly through immunization, before they ultimately develop into NCDs.  Such measures, in turn, will help them reducing the risk factors of morbidity and mortality related to NCDs.

Infections and NCDs:

As indicated above by Dr. Bennett Lorber, following are some examples of reported relationship between infection and NCDs:

Reactive Arthritis:

Reactive arthritis or spondyloarthropathy has been known to follow intestinal infection with Salmonella typhimurium and Yersinia enterocolitica or urethral infection with Chlamydia trachomatis.

Scientists from the United Kingdom have already announced that they will soon begin human trial of an experimental rheumatoid arthritis vaccine.

Peptic Ulcer and Gastric Carcinoma:

Helicobacter pylori is known to cause of gastritis and peptic ulcer disease and is an important risk factor for gastric carcinoma.

Researchers at Rhode Island Hospital in collaboration with the University of Rhode Island and EpiVax Inc, have identified a potential vaccine to reduce colonization of Helicobacter pylori, which is known to cause peptic ulcer and gastric carcinoma.

Acute Renal Failure:

It was reported that about 10% of infected persons younger than 10 years of age develop hemolytic uremic syndrome, and as many as 75% of cases of the syndrome in the United States are complications of intestinal infection with E. coli.

Vasculitis:

The most common cause of vascular damage in secondary vasculitis is now considered to be related to different types of microorganisms. Patients were reported to have developed polyarteritis nodosa a few months after having hepatitis B infection.

It is widely reported that in the developed countries most common vasculitis is related to hepatitis B and C. However, in the developing world HIV related vasculitis appears to be  common.

Inflammatory Bowel Disease (IBS)/ Crohn’s Disease:

The precise etiology of Crohn’s Disease though remains to be conclusively deciphered, it is  believed by many researchers that the disease develops due to a reaction to a persistent intestinal infection in vascular endothelial cells.

Diabetes:

A good number of experts support a link between infection with enteroviruses in the pancreata and insulin-dependent diabetes mellitus.

To arrest or slow the autoimmune response that destroys insulin-producing cells in diabetes, it has been reported that the Diamyd vaccine, now in Phase III clinical trial in both USA and Europe, has shown very promising results.

Coronary Artery Disease:

A study published in the journal of ‘Clinical Infectious Disease’, Volume 40, Issue 8 ‘demonstrates a significant association between high titers to C. pneumoniae IgG and IgA and acute Myocardial Infarction (MI) in a cohort of young men and suggests that recent or chronic active infections could be associated with an increased risk for MI.’

In other studies also, patients with acute myocardial infarction were found to have elevated serum antibody levels to Chlamydia pneumoniae. This opens up possibility of preventing heart attacks with a vaccine.

Cancer:

The US FDA has already approved two types of vaccines for cancer prevention:

  • Vaccines against the hepatitis B virus, which can cause liver cancer.
  • Vaccines against human papillomavirus, which are responsible for about 70% of cervical cancers.

In addition, US FDA has also approved another cancer vaccine for metastatic prostate cancer.

A type of cancer known as Kaposi sarcoma is linked to an infectious agent found in patients with  acquired immune-deficiency syndrome. Scientists are in the process of developing treatment vaccines against many types of cancer.

Conclusions:

In the field of NCD, a not so widely publicized scientific revolution is in the making. Many well researched findings have, to a great extent, established that infectious agents could be the causative/precipitative or risk factors for NCDs like, chronic pulmonary and cardiovascular diseases, diabetes and cancer.

The moot question raised by Dr. Bennett Lorber earlier:  ‘Are all diseases infectious?’, is gradually getting answered through intensive scientific research. Otherwise, who would have thought, until recently, that vaccines could be developed for diabetes, certain types of cancer or even peptic ulcer?

Such path breaking scientific research findings are, in turn, creating a hope and opportunity for disease prevention through immunization for many NCDs, especially for the developing nations of the world.

It is very heartening to know that United Nations (UN) have taken note of these revolutionary developments in the ‘Non Communicable Disease’ space and are deliberating on the effective ways to combat NCDs caused by infections with the development and use of appropriate vaccines.

The entire world eagerly awaits more actionable outcome of the ongoing scientific quest to decipher the mystery related to many more NCDs to ensure better health of mankind of the Planet Earth.

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.

Open Source Drug Discovery (OSDD) initiative for the tropical diseases by CSIR and cancer by GlaxoSmithKline deserves a big applaud and support from all concerned.

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As the name suggest the ‘Open Source Drug Discovery (OSDD)’ is an open source code model of discovering a New Chemical Entity (NCE) or a New Molecular Entity (NME). In this model all data generated related to the discovery research will be available in the open for collaborative research inputs. The licensing arrangement of OSDD where both invention and copyrights will be involved, are quite different from any ‘Open Source’ license for a software development.

In OSDD, the key component is the supportive pathway of its information network, which is driven by three key parameters of open development, open access and open source.

The Objectives of OSDD:

The key objective of OSDD is to encourage drug discovery initiatives, especially for the neglected diseases of the world to make these drugs affordable to the marginalized people, especially of the developing world.

International initiative:

In June 2008, GlaxoSmithKline (GSK) announced in Philadelphia, “It was donating an important slice of its research on cancer cells to the cancer research community to boost the collaborative battle against this disease.”

With this announcement genomic profiling data for over 300 sets of cancer cell lines was released by GSK to the National Cancer Institute’s bioinformatics grid. It has been reported that around 1000 researchers actively contribute to this grid from across the industry, research institutes, academia and NGOs.

Many believe that the OSDD initiative will gain momentum to encourage many more academic institutions, researchers and even smaller companies to add speed to the drug discovery process and at the same time make the NCEs/NMEs coming through such process much less expensive and affordable to a large section of the society.

On an average it takes about 8 to 10 years to bring an NCE/NME to market with a cost of around U.S$ 1.7 billion.

OSDD in India:

In India, Dr. Samir Brahmachari, the Director General of the Council of Scientific and Industrial Research (CSIR) is the champion of the OSDD movement. CSIR believes that for a developing country like India, OSDD will help the common man to meet his unmet medical needs in the areas of neglected tropical diseases.

OSDD in India is a global platform to address the neglected tropical diseases like, tuberculosis, malaria, leishmaniasis by the best research brains of the world, together.

To fund the OSDD initiative of the CSIR the Government of India has allocated around U.S $40 million and an equivalent amount of funding would be raised from international agencies and philanthropists.

It has been reported that current priority of CSIR in its OSDD program is the tuberculosis disease area.

Why tuberculosis?

The published reports indicate, in every 1.5 minutes one person in India dies of tuberculosis and about 33 percent of the global population is infected primarily with Mycobacterium tuberculosis. The world is still quite far from having an effective vaccine or drug, which can offer long term protection against this dreaded disease.

Partnerships of Industry with belief in Open Source systems and models with CSIR in its OSDD project for tuberculosis, could help finding out a suitable answer to this long standing problem, sooner than later.

Success of OSDD initiative of CSIR:

Late November 2009, I received a communication from the CSIR informing that their OSDD project, since its launch in September 2009, has crossed 2000 registered users. The pace of increase in the number of registered users indeed reflects the confidence this initiative has generated among the interested researchers, the world over.

OSDD community of CSIR has several credits to be proud of including open peer review, open funding review, large number of real time data on open lab notebook.

CSIR has also indicated that the next big leap planned by them is to completely re-annotate the MTb genome for which OSDD has launched ‘Connect to Decode’ 2010 (http://crdd.osdd.net). They initially expected about 150 participants to join, but within a week, they got about 450 participants. That is really the strength of collaboration on OSDD!

Congratulations CSIR and its leader Dr. Samir Brahmachari.

By Tapan 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.