Crossing
the Valley of Death with Advanced Therapy.
Is there
hope for patients with advanced cancer?
Yes there
is.
Yet,
experimental treatments raise controversy. Although it seems obvious that new
technologies are needed to supplement existing ones to help patients with
currently incurable cancer, the Valley of Death, the gap between the laboratory
and clinic, claims most projects. Unfortunately, crossing the Valley is not
getting easier. Instead, it is more and more difficult every year to convert
promising medical technologies into clinical trials. The one constant in
biomedicine seems to be that regulation can only increase, leading to
continuous increase in costs.
Experimental
cancer therapy can mean many things, but usually it refers to a technology
whose safety and efficacy has (not yet) been proven in rigorous clinical
trials. Sometimes the situation can be that the drug has been used for some
other patient population. Some drugs or treatment approaches never found a
sponsor and thus there was no money for clinical trials, which cost millions.
In fact, the current average cost of developing a new cancer drug has been
calculated to be about 5 billion USD. The continuous increase in development
costs is reflected in the price of drugs which have skyrocketed.
There are
two basic approaches that can be employed in experimental therapy. When
experimental therapy is administered according to a rigid protocol defined in
advance the approach is called a clinical trial. There is always a chance of
therapeutic benefit in clinical trials, because otherwise the trial would not
be acceptable ethically. However, in fact the primary goal of a trial is to
increase scientific information while patient benefit is a secondary goal. Clinical
trials are the main mechanism by which clinical medicine improves and thus they
are of critical importance for humankind including future patients and their
close ones.
Experimental
therapy can also be given in an individually tailored manner without a strict protocol,
and in this scenario the only purpose is to try to help the patient. In fact,
the aim of the intervention separates clinical trials from experimental
treatment most clearly; is the primary goal to increase scientific knowledge or
to help an individual?
Experimental
therapy is based on science and it should be distinguished from “alternative
therapy” which means therapy not based on science.
It can be
easily be overlooked that most “routine” treatment is also experimental on the
patient level. For example, if there is a “treatment A“, which is based on
rigorous scientific evidence, it usually means that hundreds or thousands of
patients were treated in clinical trials in comparison to “treatment B”.
Perhaps A was effective in 60% and B in 45%. Thus A became the “standard
therapy” used for all patients, even though 40% did not benefit from it, and in
fact some patients who received A without effect might have benefited from B.
In the case
of metastatic cancer, the most depressing aspect of routine therapy is not the
fact that it may have low efficacy, or that it can cause severe side effects.
Instead, the worst part is that it is well known what it can do at its best.
With several exceptions, including many blood cancers, a proportion of pediatric
cancers and certain rare adult solid tumors, cancer which has spread beyond
local areas cannot be cured with routine treatments. This news usually comes as
a shock to patients and their relatives.
Is there
any hope?
Yes!
Many new
types of treatment are entering clinical practice. As described in my book “Crossing
the Valley of Death with Advanced Therapy”, cancer immunotherapy is one of the
most promising. After more than 100 years of development many immunotherapeutics
have entered late stage clinical testing and a few have already entered routine
use. In contrast to most other classes of cancer drugs, immunotherapy appears to
have curative potential even in the setting of metastatic cancer. However,
currently only a minority of patients benefit and thus much work remains.
Unfortunately,
the obstacles in the path of implementing scientific discovery for the benefit
of patients continue getting more and more difficult. Nowhere is this more
evident than in the story of the Advanced Therapy Access program. Utilizing the
EU Advanced Therapy directive, and its “Hospital Exemption”, 290 patients with
incurable cancer were treated with oncolytic adenoviruses, a potent form of
immunotherapy. Although the treatment program can be considered a clinical
success, a new department head of Finnish regulatory agency FIMEA asked the
police to investigate if the individualized treatment program was in fact not a
clinical trial done without a trial permit. The book tells the story and also reviews the
history of oncology, immunotherapy, gene therapy and oncolytic viruses.
Akseli
Hemminki, MD, PhD
professor
of oncology, scientist, enterpreneurer
Crossing
the Valley of Death with Advanced Therapy. Published by Nomerta, Turku,
Finland, 2015. Available at http://www.nomerta.net and several e-book stores globally
