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Dawns A New Era: Regenerative Medicine For Degenerative Disease

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Could breakthrough innovation in ‘Regenerative Medicine’ significantly reduce the need of expensive lifelong medications, or even make the use of some important medical devices less relevant, or even help avoiding expensive and risky surgical interventions? The common answer to these critical questions is now getting clearer, in tandem with the rapid progress of the science of ‘Regenerative Medicine.’

On June 13, 2017, Nature Biomedical Engineering published an interesting an article titled, “3D-printed vascular networks direct therapeutic angiogenesis in ischemia.” In simple words, these 3D-Printed patches are going to usher in a highly innovative way to treat ischemic diseases, in the future. As the researchers highlighted, arterial bypass grafts are currently considered as the gold standard for the treatment of end-stage ischemic disease, though many patients are unable to tolerate the cardiovascular stress of arterial surgery. The researchers found that implantation of 3D-printed grafts containing endothelial-cell-lined lumens, induces spontaneous and geometrically guided generation of collateral circulation in ischemic settings.

In rodent models of hind limb ischemia and myocardial infarction, these scientists successfully demonstrated that the vascular patches rescue perfusion of distal tissues, preventing capillary loss, muscle atrophy and loss of function.

In this article, I shall deliberate on the importance of this discovery, and its overall future implications on a broader perspective.

Regenerative medicine:

Here comes the basic question – What is ‘Regenerative Medicine’?

It is defined as a highly innovative branch of medicine that develops implementable methods to regrow, repair or replace damaged or diseased cells, organs or tissues. According to RegerativeMedicine.net following are illustrations of some conditions or diseases that regenerative medicine has the potential to cure, and what their current state of treatment looks like in in the American perspective:

  • Heart valves- 250,000 patients receive heart valves, at a cost of US$27 billion annually
  • Heart disease and Stroke- 950,00 people die of heart disease or stroke, at a cost of US$ 351 billion annually
  • Diabetes- 17 million patients have diabetes, at a cost of US$ 132 billion annually

I discussed in this blog, the subject of ‘3D Printing in health care’ on January 11, 2016. Hence, won’t dwell on that subject here

Ischemia, and the relevance of the above discovery:

Ischemia, as many would know, is a condition that restricts adequate flow of blood in some parts of our body, which over a period, may narrow, harden or even block the important blood vessels, much often resulting in stroke, heart attack or other related life-threatening vascular disorders.

Currently, ischemic heart conditions are usually treated either with blood thinning drugs, or blood vessel relaxants. In more serious stages of this condition, doctors prefer angioplasty or other surgical interventions, such as coronary artery bypass.

In this broad perspective, the relevance of the above discovery in addressing various debilitating or life- threatening ischemic conditions, is profound. Its novelty lies in the ability of the scientists making a 3D-printed patch that can be infused with cells to help grow healthy new blood vessels.

An emerging medical space:

The science of ‘Regenerative Medicine’ is increasingly being considered as an emerging medical space aimed at the treatment of those diseases that are usually classified as degenerative, incurable and irreversible. As it appears today, this science has the potential to unfold a new paradigm in this space, where patients can expect cure for many serious ailments, such as, spinal injuries, heart disease, Parkinson’s, Alzheimer’s disease and even diabetes, besides many others.

One more recent pursuit in this much uncharted frontier was reported in the British news daily – ‘The Telegraph’ on February 21, 2017, revealing the outcome of a path-breaking medical study for freezing the progression of a crippling ailment called Multiple Sclerosis (MS). This research followed a unique Stem Cell (SC) transplantation process, and is regarded as the largest long-term follow-up of SC transplantation treatment study of MS in regenerative medicine.

This study, spearheaded by Imperial College London, established that 46 per cent of patients who underwent the treatment did not suffer a worsening of their condition for five years. The process works by destroying the immune cells responsible for attacking the nervous system. This is indeed a very significant development in the space of medical research.

The treatment, called autologous hematopoietic stem cell transplantation (AHSCT), was given to patients with advanced forms of MS who had failed to respond to other medications. However, the researchers noted that the nature of the treatment, which involves aggressive chemotherapy, carried “significant risks”.

As many would know, MS is caused by the immune system malfunctioning and mistakenly attacking nerve cells in the brain and spinal cord, leading to problems with movement, vision, balance and speech. It’s a lifelong condition and often causes serious disability, with no cure still in sight. The disease is most commonly diagnosed in people in their 20s and 30s, although it can develop at any age.

A potential game changer:

According to California Institute for Regenerative Medicine (CIRM), this procedure has a game changing potential for successful use:

  • To replace neurons damaged by spinal cord injury, stroke, Alzheimer’s disease, Parkinson’s disease or other neurological problems
  • To produce insulin that could treat people with diabetes, and heart muscle cells that could repair damage after a heart attack, or
  • To replace virtually any tissue or organ that is injured or diseased

Research on “Regenerative Medicine’ signals a new hope:

Following are examples of just a few more promising developments, indicating that research in ‘Regenerative Medicine’ is taking rapid strides, signaling a new hope:

- A cure for Type 1 diabetes:

According to an international report on October 9, 2014, for the first time after 23 years of research, Harvard University has been able to manufacture millions of beta cells required for transplantation. It could mean a cure for diabetes, and the end of daily insulin injections for patients living with Type 1 diabetes. Although, just around 10 per cent of all diabetes is Type 1, it is the most common type of childhood diabetes.

The report indicated, the stem cell-derived beta cells are presently undergoing trials in animal models, including non-human primates, where they are still producing insulin after several months.

Another report of April 2014 indicates that for the first time, scientists have successfully replaced the damaged DNA of a type 1 diabetes sufferer with the healthy genetic material of an infant donor. When these cells are injected back into the diabetic patient, it is expected that they will begin to produce insulin on their own.

- Restoring vision in macular degeneration:

Yet another study published in ‘The Lancet’ in October 2014 stated that scientists in the United States have announced that single transplant of stem cells has helped restore the sight of patients suffering from incurable forms of blindness due to Age-related Macular Degeneration (AMD). Currently no effective treatments exist for this eye disorder, which can cause complete blindness due to the loss of light-receiving photoreceptor cells in the retina.

To recreate a type of cell in the retina that supports those photoreceptors, the new treatment uses stem cells derived from embryos that are only a few days old and have the ability to develop into any kind of tissue in the body. However, the transplants have proved controversial because they use stem cells derived from spare human embryos left over from IVF treatment.

- A cure for heart failure:

One more international report of May 01, 2014 states, by injecting human stem cells into the organs of macaque monkeys, scientists have been able to regenerate their damaged hearts by up to 40 per cent in just a few weeks. Thus, it appears now that a cure for heart failure could be just a few years away and would mean that even people who are “bed-bound” with heart failure could be “up and about” again within a few weeks.

As on date, the heart muscle cannot be repaired, making people with severe heart failure necessarily wait for a heart transplant, provided the patients are willing, and can afford so.

Conclusion:

There is a host of diseases, including several chronic ailments, such as diabetes, heart conditions, rheumatoid arthritis, or some types of cancer, which can’t be reversed, however, could be managed with a lifelong treatment. For most of these diseases, ‘Regenerative Medicine’ has the potential to be a game changer by transforming many lives.

Moreover, ‘Regenerative Medicine’ is expected not just to bring down the cost of health care and the disease burden significantly, but would also help increasing the economic productivity of a nation considerably.

Currently, medical research of the highest order in this area, has mostly been conducted by various academia of global repute, along with a few in the industry. It should soon involve, besides patients, several industries, including pharmaceuticals and biotech sectors, in a big way.

Nevertheless, this emerging trend sends a clear signal that to treat various chronic, incurable, irreversible and seriously debilitating degenerative diseases ‘Regenerative Medicine’ is now poised to take a giant leap in the health care space.  In that process, it would possibly help healing various ailments in a more meaningful, providing a cure for many chronic diseases that was a badly missing piece in the medical science, so far.

Thus, ‘Regenerative Medicines’ to treat many ‘Degenerative Diseases’ signal a great potential to give an altogether new shape and dimension to the future of global health care. It is also expected to ensure lesser lifelong usage of expensive drugs, setting a new normal to bring back the patients’ lives back to the pre-disease state.

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.

 

 

Stem Cell Therapy in India: A Potential Game Changer in Disease Treatment

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Stem Cells (SC) offer an incredible potential to instill a new lease of life virtually to any organ of the human body, bringing them back to the pre-disease state through its own biological repair mechanism. Intensive research initiatives are on across the world to harness this unique possibility that will be able to successfully address a plethora of serious and chronic ailments for mankind. The good news is, the global scientific community is taking rapid strides in understanding the complex stem cell biology to give shape to a game changing medical treatment blue print for tomorrow.

Capturing one such pursuit, on February 21, 2017, well-reputed British news daily – ‘The Telegraph’, reported the outcome of a path-breaking medical study for freezing the progression of yet another complex and crippling ailment – Multiple Sclerosis (MS). This research followed a unique SC transplantation process. Intriguingly, both such diseases and the treatment are not generally much talked about, particularly in India. If done, it would increase public awareness and help many patients fetch greater benefits from the available and approved SC therapy in the country. Probably, considering the unfathomable scope of the body’s own repairing toolbox with SC, Prime Minister Narendra Modi reportedly called on Indian biologists to motivate school children for pursuing a career in stem cell research.

Let me now go back for a moment to Multiple Sclerosis (MS) as I am aware of this this disease condition rather closely. One of our close family friends who was a very senior official in one of the top multinational corporations of the world, had to give up his job prematurely being a victim to this serious illness. In that sense, this particular news item rekindles a new hope for many to look for a better quality of life while managing many other diseases of such kind, all over the world, including India.

‘The Telegraph’ reported: in so far, the largest long-term follow-up of SC transplantation treatment study of MS, which was spearheaded by Imperial College London, established that 46 per cent of patients who underwent this treatment did not suffer a worsening of their condition for five years. The treatment works by destroying the immune cells responsible for attacking the nervous system. This is indeed a very significant development in the space of medical research.

This new treatment, called autologous hematopoietic stem cell transplantation (AHSCT), was given to patients with advanced forms of MS who had failed to respond to other medications. However, the researchers noted that the nature of the treatment, which involves aggressive chemotherapy, carried “significant risks”.

It’s worth recapitulating here that MS is caused by the immune system malfunctioning and mistakenly attacking nerve cells in the brain and spinal cord, leading to problems with movement, vision, balance and speech. It’s a lifelong condition and often causes serious disability, with no cure still in sight. The disease is most commonly diagnosed in people in their 20s and 30s, although it can develop at any age.

A new hope with a game changing potential:

The above study of SC transplantation conducted by Imperial College London in MS, is just a recent example, among scores of major steps being taken in this frontier of medical science in preparation of a decisive battle against many more life-threatening and serious debilitating diseases.

No doubt that various treatments involving stem cells are generally considered a novel and rapidly advancing medical technology. However, in a small number of developed countries, such as the United States (US), a number medical procedures with stem cells are being practiced since around last three decades. Bone marrow transplant is the most widely used stem-cell therapy in this area, which was first performed in 1968.

According to California Institute for Regenerative Medicine (CIRM) and various other medical literature, SC treatment has the game changing potential for successful use to:

  • Replace neurons damaged by spinal cord injury, stroke, Alzheimer’s disease, Parkinson’s disease or other neurological problems
  • Produce insulin that could treat people with diabetes and heart muscle cells that could repair damage after a heart attack, or
  • Replace virtually any tissue or organ that is injured or diseased

Thus, stem cells offer limitless possibilities, such as tissue growth of vital organs like liver, pancreas. Today there are many diseases for which no effective treatment still exists, besides giving symptomatic relief, such as Multiple Sclerosis, Parkinson’s disease, Alzheimer’s, severe burn, spinal cord injury. There is a host of other diseases, including several chronic ailments, such as diabetes, heart ailments, rheumatoid arthritis, or some types of cancer, which can’t just be reversed, however, could be managed with a lifelong treatment. For most of these diseases, and several others involving tissue degeneration, SC therapy has the potential to be a huge life and a game changer. It may involve, besides patients, several industries, including pharmaceuticals and biotech sectors.

Major stem cell sources and some key milestones:

Medical scientists and researchers have conclusively established that stem cells are the master cells of any human body. These are undifferentiated cells of the same lineage, retaining the ability to divide throughout life and grow into any one of the body’s more than 200 cell types. Some of the major sources of stem cells in the human body are bone marrow, cord blood, embryonic cells, dental pulp and menstrual blood.

As captured by ‘ExploreStemCells’ of UK, some key events in stem cell research include:

  • 1978: Stem cells were discovered in human cord blood
  • 1981: First in vitro stem cell line developed from mice
  • 1988: Embryonic stem cell lines created from a hamster
  • 1995: First embryonic stem cell line derived from a primate
  • 1997: Cloned lamb from stem cells
  • 1997: Leukemia origin found as hematopoietic stem cell, indicating possible proof of cancer stem cells
  • 1998: University of Wisconsin isolated cells from the inner cell mass of early embryos and developed the first embryonic stem cell lines.
  • 1998: Johns Hopkins University derived germ cells from cells in foetal gonad tissue; pluripotent stem cell lines were developed from both sources.
  • 1999 and 2000: Scientists discovered that manipulating adult mouse tissues could produce different cell types. This meant that cells from bone marrow could produce nerve or liver cells and cells in the brain could also yield other cell types.

All these discoveries were exciting for rapid progress in the field of stem cell research, along with the promise of greater scientific control over stem cell differentiation and proliferation. Currently, many more research studies are underway in globally acclaimed institutions and other boutique laboratories exploring the possibility of wide scale use of SC therapy, even in the treatment of several chronic diseases, including diabetes and heart disorders.

A controversy:

The controversy related to SC research mainly involves Embryonic Stem Cells (ESC) and raises several difficult questions for a speedy resolution. As articulated by the ‘Genetic Science Learning Centre’ of the University of Utah, these are mainly:

  • Does life begin at fertilization, in the womb, or at birth?
  • Is a human embryo equivalent to a human child?
  • Does a human embryo have any rights?
  • Can destruction of a single embryo be justified to provide a cure for a countless number of patients?
  • Since ESC can grow indefinitely in a dish and can, in theory, still grow into a human being, is the embryo really destroyed?

However, in 2006 scientists learned how to stimulate a patient’s own cells to behave like embryonic stem cells. These cells are reducing the need for human embryos in research and revealing exciting new possibilities for stem cell therapies, according to this Centre.

Stem cell research in India:

India has pursued SC research since over a couple decades reasonably supported by the Government, especially the Department of Biotechnology (DBT), besides several remarkable initiatives from the private sector. Ethical guidelines in this regard are also in place, so also are the National Guidelines for Stem Cell Research in India. These guidelines are aimed at obtaining licenses from the Drug Controller General of India (DCGI).

Further, in a major move to regulate and oversee the activities by streamlining SC research in the country, the Government has also set up an Institutional Committee for Stem Cell Research and Therapy (IC-SCRT) and the National Apex Committee for Stem Cell Research and Therapy (NAC-SCRT). This necessitates the researchers on human stem cells, both institutions and the individuals, to be registered with NAC-SCRT through IC-SCRT. To ensure that the concerned companies and individuals follow the National Guidelines, these committees will review, approve and monitor each research project in this area. It now calls for even greater focus from all other stakeholders to help accelerate growth of this niche segment of medical science for patients’ benefits.

SC transplantations using umbilical cord blood and bone marrow for treating neurological, hematological, hepatic and cardiac disorders are being pursued by some well-known medical institutions, such as, AIIMS, PGI Chandigarh, CMC Vellore, AFMC Pune, Manipal Hospital Bangalore. For example, AIIMS, reportedly, undertook a major multi-center trial to look at the role of stem cells in repairing tissue damaged during acute heart attacks, where other treatment process, including a cardiac bypass surgery fails to adequately improve the heart function. Similarly, Shankar Netralaya in Chennai has successfully carried out limbal stem cell transplantations for restoring vision to several patients.

That said, this is a cost intensive area of research, which involves expensive equipment, reagents and other consumables. Moreover, ensuring continuous training for SC researchers and clinicians also poses a major problem. Greater international collaboration in this area, and increasing number of Public-Private-Partnership (PPP) could accelerate the progress of India in this hugely promising area of medical science, reaping a rich harvest for a large patient population of the country.

Stem cell banking:

SC banking is a fast-developing area in this field, especially designed for SC therapy. As not many patients are not currently as much aware or interested in SC therapy as they ought to, it may not appear as an immediate requirement for many. However, an encouraging trend is fast catching up, especially within some enlightened persons, to have in a bank a large reserve of their own or their baby’s stem cells that would be available for any medical emergencies or more effective treatment options, in the future.

It assumes increasing importance because, as we age, illness and the natural process of aging could reduce the number of stem cells available to regenerate organs, muscles and bone. At that time, while treating a serious illness or a grave injury, a person may have fewer adult stem cells that have the collective power to make an effective healing response to SC therapy.

In that context, SC banking provides a great opportunity to store, multiply and utilize a newborn’s or even an adult person’s younger and healthy stem cells for SC therapy during any medical emergency, such as a serious accident or a crippling illness, at a later stage in life.

There are broadly the following two types of SC banking facilities are now available in India:

A. Cord blood stem cell banking:

This is type of SC banking is the process of collecting, processing, cryogenically freezing and preserving the ‘Cord blood’ that remains in the vein of the umbilical cord and placenta at the time of birth, for potential future medical use during SC therapy. Stems cells extracted from the umbilical cord blood have been shown to be more advantageous than those extracted from other sources such as bone marrow. These banked stem cells are considered as a perfect match for the lifetime of the donor baby, and for other family members, as well. This is significant as there exists a greater chance for success in a stem cell transplant between siblings than with unrelated donors and recipients.

B. Adult stem cell banking:

Some state-of-the-art adult stem cell banking services are either already available or in the process of coming up in many places of the world, including India. As an individual’s fat (adipose tissue) is an important source of adult stem cells, with the application of a high precision medical technology of separating, multiplying, and storing adult adipose tissue-derived mesenchymal stem cells for autologous use by physicians, ‘Adult stem cells are stored in these banks.

The good news is, increasing awareness in this area has now started prompting many parents, and also some adults to bank or store their own SC and the baby’s cord blood rich with a specific types of stem cells, that can be utilized, at a later date, in a variety of SC therapy while treating many life-threatening and debilitating diseases, if required.

Types of stem cell therapy:

There are two major types of SC therapies, and both are available in India:

  • Autologous stem cell therapy: uses the adult patient’s own stem cells obtained from the blood, bone marrow.
  • Allogenic stem cell therapy: uses donated stem cells, but faces chances of donor stem cell rejection.

As articulated in the revised stem cell guidelines, stem cells can’t be offered to patients in India as ‘therapy’ unless these are proven effective and safe supported by unequivocal clinical trial data and approved by the DCGI. Otherwise, these can be used only in ‘clinical trials’ as will be approved by the DCGI. The only exception to this is the use of haematopoietic (blood forming) stem cells for treating blood disorders, which is considered as ‘a proven therapy,’ according to available reports.

The Market – Global and India:

September 14, 2015 issue of ‘The Pharma Letter’ stated based on a recent report that the global stem cells market was valued at US$ 26.23 billion in 2013, and is estimated to be worth US$ 119.52 by 2019, registering at a Compounded Annual Growth Rate (CAGR) of 24.2 percent. Whereas, in India, the stem cell market is expected to be around US$ 600 million by 2017. Another report, titled ‘India Stem Cells Market Forecast & Opportunities, 2020’ of ‘Pharmaion’, states that stem cells market in India is expected to grow at a CAGR of over 28 percent during 2015 – 2020.

In terms of services offered, stem cells market in India has been segmented into two main categories, namely SC banking, and SC research. The latter dominated the market in 2014, and is likely to continue its dominance through 2020. Adult stem cells accounted for the majority share in India’s SC market in 2014, as a lot of research being carried out using adult stem cells, besides growing adult stem cell banking and other associated applications in therapeutics.

The major growth drivers for SC market are: increasing patient awareness, an increase in the approval for clinical trials in stem cell research, growing demand for stem cell banking services,

Government support, rising investments in research, and ascending trend of development for regenerative treatment to meet unmet medical needs.

The first stem cell based product approval in India:

On May 30, 2016, a Press Release of ‘Stempeutics Research’ of Bengaluru announced that for the first time in India, DCGI has granted limited approval for manufacturing and marketing of its allogeneic cell therapy product named Stempeucel® for the treatment of Buerger’s Disease – a rare and severe disease condition affecting the blood vessels of the legs, which finally may require amputation. Stempeucel® treatment is designed to enhance the body’s limited capability to restore blood flow in ischemic tissue by reducing inflammation and improving neovascularization. The prevalence of Buerger’s Disease is estimated to be 1,000,000 in India and two per 10,000 persons in the EU and US, as the release stated. Stempeutics Research’ is a company of Manipal Education & Medical Group and a Joint Venture with Cipla Group.

Conclusion:

Research on stem cells, across the world, is taking rapid strides. It has already demonstrated its healing power in changing many human lives either by significantly stalling the progression of several serious ailments, such as Multiple Sclerosis (MS), or reversing the disease conditions, such as serious damage to the heart caused by massive myocardial infarction.

An increasing number of stem cell banks coupled with growing public and private investments in stem cell research, positive narratives are getting scripted for this space in India. With rapidly growing middle class population and comparatively less stringent rules and regulations, India is emerging as a perfect destination for many more global and local stem cell banking companies. Consequently, the stem cell market in the country is expected to witness robust growth in the coming years.

However, only future research on stem cells will be able to unravel whether an Alzheimer’s victim will get back the stolen memory; a cancer patient won’t have to mentally prepare to die of cancer anytime soon, besides spending a fortune towards cancer therapy; an insulin dependent diabetic will no longer require insulin; an individual with damaged heart won’t have to continue with lifelong medication, and it goes on and on.

Nevertheless, if it does… and God willing – it will, ‘Stem Cell Therapy’ would not just be a life changer for many patients, it will be a game changer too for several others, including the pharma, biotech companies and many more within the healthcare sector. If any skeptic still asks, will it really happen? My counter question, in response, will be: Why not?… Why the hell not?

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.

 

Beyond ‘The Magic Moment’ of New Drug Marketing Approval

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“Uncontrolled clinical trials are causing havoc to human life. There are so many legal and ethical issues involved with clinical trials and the government has not done anything so far.”

This is exactly what the Supreme Court of India observed while responding to a Public Interest Litigation (PIL) on the subject in January 2013.

While Indian regulators with the active intervention of the Supreme Court are trying to grapple with, besides others, the basic ‘human rights’ aspect of the Clinical Trial (CT), many countries in different parts of the world are moving much ahead at a brisker pace. They have started thinking and putting in place more patient centric newer drug approval systems and also, in tandem, hastening the process of bringing new drugs to the market.

Current general scenario in CT:

Currently, after pre-clinical studies and before applying for regulatory approval, a new drug has to be tested on volunteers in randomized studies to prove its efficacy and safety on patients. Relatively short duration of new drug trials can hardly establish long-term safety and efficacy, which are now arrived at through extrapolation of data collected during CT period.

It is worth noting, the overall situation changes dramatically after launch of these products, as their usage expands from a relatively smaller number of CT volunteers to millions of real-world patients.

In a situation like this, unrealistic expectation of patients’ safety in perpetuity based primarily on extrapolation of very limited CT data is being increasingly questioned today.

That is why, on going post-marketing surveillance, which is also known as a Phase IV CT, is considered as a much more effective process to gauge relative superiority of the drug against the existing ones in terms of both efficacy and safety on a longer term.

That said, today one reads and hears umpteen number of accusations for almost lack of any meaningful response on the part of the pharmaceutical companies, in general, towards revelations of post-marketing surveillance data. This could, in turn, expose the patients to various types of risks, including wasteful healthcare expenditure.

The ‘Magic Moment’ in the present regulatory process:

A recent paper highlights a single “Magic Moment” between pre and post-licensing processes in the current drug-approval model in many countries. In this system, the use of a drug is tightly controlled in a narrowly defined pre-licensing population. Thus, CTs are also conducted on such pre-defined and relatively homogeneous volunteers, who are generally free from complicating conditions.

However, after ‘The Magic Moment’ of marketing approval, a large number of heterogeneous patient population, with many of them on multiple therapy, also use these new products in uncontrolled settings. Situations as these had led to post-marketing major drug withdrawals like, Vioxx and Avandia due to patients’ safety.

These grave concerns have led to a strategic shift in the drug regulatory approval scenario throwing open new ideas in the drug approval process.

Adaptive Licensing:

To find the right answer to this vexing issue the drug regulators in many countries are  reportedly seriously contemplating to imbibe a process that will continuously help analyzing information through ongoing post-marketing surveillance data. Continuous medical data analysis like this will enable the regulators to modify their earlier decisions on marketing approval and also medical reimbursements related to pricing reasons.

This new process is called ‘Adaptive Licensing (AL)’, which is expected to benefit the overall healthcare system, by not allowing medical reimbursement of treatments with those drugs, which will provide negligible benefit over existing low cost therapies.

Difference between current mechanism and AL:

According to a ‘Health Canada’ paper titled, “The Path to Adaptive Drug Regulation”, the difference between the two is as follows:

Current system:

As explained above, post-licensing i.e. after ‘The Magic Moment’ of regulatory approval, treatment population grows rapidly and treatment experiences do not contribute to evidence generation.

Adaptive Licensing:

After initial license, treated patients grow more slowly due to regulatory restrictions. Patient experience is captured to contribute to real-world information. The marketing license is also modified accordingly from time to time.

Most desirable for many drugs:

Experts in this field opine that AL will help bringing in alignment of all required processes so important for a new drug seen from patients’ perspective like, R&D, regulatory approval and market access with the active involvement of all stakeholders like, the pharmaceutical companies, the drug regulator, payors/insurance companies and also the researchers.

In the AL system, a transparent drug development process will provide enough data on risk-benefit profile of the concerned drug to satisfy the drug regulator for its quick marketing authorization on pre-determined types of patients.

Such approval will follow real-life monitoring of efficacy and safety for modification of the drug license accordingly, wherever and whenever required.

Thus, AL is expected to strike a right balance balance between timely access to new drugs for the patients and the need to evaluate real time evolving information on safety and efficacy leading to a well-informed patient centric decisions by the drug regulators.

A continuous regulatory evaluation and decision-making process:

AL intends to evaluate a drug through its entire life span.  It has been reported that during this long period, clinical and other data will “Continue to be generated on the product through various modalities, including active surveillance and additional studies after initial and full licensing. The artificial dichotomy of pre vs. post licensing stages (‘The Magic Moment’) will be replaced by graded, more tightly managed, but more timely and potentially more cost-effective market entry and market stability.”

Not necessary for all drugs in the near term:

It is worth noting that AL system may not perhaps be required for all pharmaceutical or biologic products and will not totally replace the current system of drug licensing process, at least in the near term.

AL process may immediately be followed only for those products with a favorable risk-benefit drug profile as demonstrated in the initial data and there is a robust reason for early market entry of this drug to meet unmet needs, simultaneously with ongoing studies.

The ‘Magic Moment’ freezes in India…in perpetuity:

As per the Drugs and Cosmetics Act of India, after obtaining drug marketing approval from the regulators, concerned pharmaceutical companies are required to follow the pharmacovigilance system in the country to own the responsibility and liability of the drugs as enunciated in the Schedule Y of the Act. Unfortunately, this is hardly being followed in India, ignoring patients’ safety blatantly.

With the plea that most products launched in India are already being marketed in many developed markets of the world, the concerned companies prefer to depend on clinical experiences in those markets. This attitude totally bypasses the regulatory requirement to follow a robust pharmacovigilance system in India. Indian drug regulators also do not seem to be much concerned about this important patients’ safety related requirements, very surprisingly not even for biosimilar drugs.

However, the current ground realities are quite different. As we witness today, there does not seem to be much difference in time between international and India launch of innovative products. Thus, the argument of gaining medium to long-term experience on safety and efficacy from international data related to these drugs, does not seem to hold any water at all.

On the contrary, some drugs withdrawn from the international markets on safety grounds are still available in India, despite ire and severe indictment even from the Indian Parliamentary Standing Committee.

In a situation like this, AL process of Marketing approval for selected newer and innovative drugs may be considered by the Indian Drug Regulators, just not to be more patient centric, but also to help evaluating  pricing decisions of innovative drugs failing to demonstrate significantly better treatment outcomes as compared to the existing ones.

A recent example of AL:

One of the latest drugs, which reportedly will undergo such regulatory scrutiny of USFDA is Tacfidera (dimethyl fumarate) used for the treatment of multiple sclerosis, approved in April 2013 and costing US$ 54,900 per patient per year.  Interestingly, Tacfidera, before the drug can find itself on a formulary, will need to demonstrate its effectiveness in the real world.

The report indicates, “the first six months after a drug launch are always about educating payers about its benefits, and while most large payers are likely to make a decision to reimburse the drug in the next twelve months, data collection will continue and changes in policies might be made at a later date.”

Thus, in the years ahead, whether a new drug will become a blockbuster or not will very largely be decided by the ongoing real world data. If the promise of a drug diminishes at any point of time through clinical data, it will certainly going to have consequential financial and other adverse impacts.

Another interesting recent development:

Under new pharmacovigilance legislation in Europe, the European Medicines Agency has reportedly announced the list of over 100 drugs that soon will bear the “black triangle” logo. This initiative is directed to encourage both the doctors and patients to report side effects to enable close monitoring of drug safety.

Criteria to include drugs under additional monitoring are:

  • Medicines authorized after January 1, 2011 that contain a new active substance.
  • Biologics for which there is limited post-marketing experience.
  • Medicines with a conditional approval or approved under exceptional circumstances.
  • Medicines for which the marketing-authorization holder is required to carry out a post-authorization safety study (PASS).
  • Other medicines can also be placed under additional monitoring, based on a recommendation from the European Medicines Agency’s Pharmacovigilance Risk Assessment Committee (PRAC).

Conclusion:

Global regulatory experts do believe that in the concept of AL, there are still some loose knots to be tightened expeditiously to make it a fully implementable common drug marketing authorization process.  Appropriate pilot projects need to be undertaken in this area to establish beyond any doubt that AL will be decisively more preferable to the current regulatory process.

As and when AL will become the preferred drug-licensing pathway across the world, it is expected to offer greater real benefits of new drug development to the patients for their optimal use at an affordable price.

That said, some other experts do opine as follows:

“No matter how fast the authorization process operates, the merits of innovation will not be felt until they reach patients. And the barrier between authorization and patient access remains, in most of Europe, the issue of reimbursement.”

While all these are fast developing in the global CT scenario, in the jangle of Clinical Trials‘ in India, ‘Adaptive Licensing’ has still remained a critical missing ingredient even to encourage a wider debate.

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.