Many volunteers
world-wide commit themselves to raising funds for cancer research
and cancer charities. Many hundreds of thousands more work in
the industry as carers, or researching, prescribing, diagnosing
and manufacturing drugs. Huge companies spend fortunes on cancer
research. After so long and so many billions spent what exactly
has cancer research revealed?
There have been regular breakthroughs in our
understanding of cancer, but little progress in its treatment.
Modern research into cancer began in the 1940’s and 50’s
when scientists isolated substances that killed cancer cells growing
in a petri dish, or leukaemia cells in laboratory mice. Early
successes in chemotherapy set the pace and received much media
exposure, even though they only applied to 5% of cancer treatments
at most.
Serving humanity by solving its major diseases
has a celebrity status, there is a lot of kudos and an air of
Hollywood involved in such things.
Cancer research is high profile activity and
every now and then a scientific treatment is discovered that gains
wide recognition, such as the HPV-16 trial, but it only applies
itself to the treatment of a small percentage of cancers. Mass-media
hype is part of the problem of how we see cancer. Early discoveries
set up an expectation that there was a cure-all treatment, a ‘magic
bullet’ that would make its discoverer famous by curing
cancer across the world. The idea stems in part from aspirin,
the original bullet that magically finds its way to the pain and
diminishes it.
In the 1950’s and 60’s huge and expensive
research projects were set up to test every known substance to
see if it effected cancer cells. You might remember the discovery
of the Madagascar Periwinkle (Catharansus Roseus), which revealed
alkaloids (vinblastine and vincristine) that are still used in
chemotherapy today. Taxol, a treatment for ovarian and breast
cancer originally came from the Pacific Yew tree. A treatment
for testicular cancer and small-cell lung cancer called ‘Etoposide’
was derived from the May apple. In ‘Plants Used Against
Cancer’ by Jonathan Hartwell over 3,000 plants are identified
from medical and folklore sources for treating cancer, about half
of which have been shown to have some effect on cancer cells in
a test tube.
When these plants are made into synthetic drugs,
single chemicals are isolated and the rest of the plant is usually
thrown away. The medicinally active molecules are extracted from
the plant and modified until they are chemically unique. Then
the compound is patented, given a brand name and tested.
In the first phase it will generally be tested
on animals, the second phase will decide dosage levels and in
phase 3 it is tested on people. By the time it is approved by
the Federal Drugs Authority (in U.S.A.) or the Medicines and Healthcare
Products Regulation Agency (M.H.R.A.) in Britain, the development
costs for a new drug can reach five hundred million dollars, which
eventually has to be recouped from the consumer.
In addition to ‘treatment directed’
research such as finding chemicals that effect cancer cells, basic
research continues apace, into differences between normal and
cancerous cells. In the last 30 years this research has revealed
much about our nature, but still no cure. Below are some current
strands of scientific research into cancer.
Antibody-guided therapy: this is the original
‘magic bullet’. Cancer researchers use monoclonal
antibodies to carry poisons directly to the cancer cells without
harming others.
Chronobiology: much of what happens in our bodies
is governed by cycles, from the female monthly cycle to the cycles
of brainwaves. Human health depends on interacting cycles geared
to acts of perception, breathing, reproduction and renewal. Chronobiology
analyses these cycles in relation to different times, such as
day and night. Hormones, including stress and growth hormones,
have their own cycles. For example they may be at their highest
activity in the morning and quieter at night. Cancer cells seem
to no longer obey the same cycle rates as normal cells.
Anti-telomerase: one part of a cell, called the
telomerase, governs the life cycle of a cell and how many times
it may multiply. Some cancer cells escape this control and can
increase the number of times they divide, becoming ‘immortal’.
Researchers hope to gain control over cancer cells by stopping
the action of telomerase.
Anti-angiogenesis: secondary tumours (metastasis)
can persuade the cells around them to grow new blood vessels to
feed the tumours, supplying oxygen and nutrients for the growing
cancer. This process is called angiogenesis and research here
is finding ways to stop the signals to normal cells that start
the process.
Anti-adhesion molecules: Cancer cells form into
clumps, unlike those in a petri dish which form into a flatter
arrangement. When there are clumps of cells they seem to possess
a quality that resists treatment. This strand of research looks
at ways that can stop the cells clumping together, by dissolving
the clumps for more effective treatment.
Anti-oncogene products: specific portions of
D.N.A., called oncogenes, that have an important role in promoting
cancer growth. Drugs that interfere with the production of oncogenes
may be useful for the future treatment of cancer.
Gene therapy: research into the use of tumour
suppressant genes is highlighted in the British National Cancer
Plan as an important element. Essentially, bits of DNA are inserted
to replace missing or damaged genes, possibly preventing the development
of cancer in someone who might be ‘high risk’.
Vaccines: very quietly the search for a general
cure for cancer is being put aside in preference to finding a
vaccine. The whole idea of a cure or treatment that is ‘the
same for everybody’ breaks down in the case of the specific,
chaotic conditions that cause cancer in an individual person.
After billions spent on research for the holy grail of a cancer
cure, the search is now on to find a vaccine.
At a recent cancer immunology conference in the
US top immunologists from 21 nations attended lectures on the
latest immunology topics such as:cancer immunosurveillance, immunoediting,
cancer antigen discovery, monitoring and analysing the immunological
response to human cancer, cancer vaccine development.
The Cancer Vaccine Collaborative (CVC) was launched
to much excitement. It is a unique research program that should
improve how cancer vaccines are developed, based on a collaboration
of six New York medical centres and one in Minnesota. The aim
of their research is to find out how to effectively immunise against
cancer using a vaccine, using ‘action research’.
Vaccines made from donor blood are proving to
work for some cancers. Experiments with bone marrow transplants
show there are about 40,000 different tissue types making it hard
to find a match. Usually a perfect match can only be found within
the patient’s direct family. Incorrect matches can create
a host of secondary dis-eases. Scientist are finding ways to train
Killer T cells taken either from the host or a donor, to more
effectively attack cancer cells. They have noticed that donor
Killer T cells that are already ‘primed’ for a particular
cancer (e.g. the donor body cells ‘remember’ the disease)
can be highly effective. It may take many years to prove validity,
reliability, safety and efficacy for this treatment. Harvesting
the natural immunity of our own, or donor cells with the aid of
genetic engineering may well become a big player against modern
immune attacking dis-eases.
Increased screening: this type of research looks
at genetically identifying individuals who might be at high risk
of certain types of cancer and is partly a preparation for possible
vaccines. Genetic counselling is set to become a 21st century
contributor to health care based on prevention of disease as much
as cure.
Combinations: research from West Germany (Grossart-Maticek)
argues that there is no single cause for cancer, similar to the
pattern in most chronic illness. It shows there are environmental,
psychological and spiritual dimensions to disease. The implication
is that treatment should be on the same levels, and that no single
treatment is likely to be effective because there is no single
cause. This observation links with the position of many Holistic
practitioners who often have a wider view of health than orthodox
medical practitioners.
Dr. Robert Buckman is an experienced cancer researcher,
and author of the informative book: ‘What You Really Need
to Know About Cancer’. He summarises what he sees as the
present position of scientific cancer research:
"We now have a very large number of ways
of looking at cancer cells in the laboratory. We have thousands
of different types of cancer cells growing in dishes, many of
which can be grown and then cured in laboratory bred mice. We
also have thousands of different ways of looking at and testing
those cells. We can look at the cells’ growth, their abilities
to produce different substances, their sensitivity to some chemotherapy
drugs and their resistance to others, the way they respond to
growth factors, their genetic material including oncogenes and
substances controlled by oncogenes, their ability to effect other
cells (of the immune system, for example), their ability to damage
membranes and invade, their structure under the electron microscope
and whether or not the cell surface has any of hundreds of different
marker molecules on it. These are just a few examples of what
can be done nowadays: the complete list of ways in which cancer
cells can be tested would probably be longer than this entire
book. But here is the snag: although this accumulation of experience
is wonderful and commendable, cancer in human beings is far more
complicated then any laboratory system can ever be (at least in
the light of current knowledge)".
This is an extract from 'Don't Get Cancer'a new
ebook available only at: http://www.simonthescribe.co.uk/don'tget1.html
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