Biomedical Engineering Reference
In-Depth Information
Diagnostic
Value
Predisposition screen
Identify patients for chemo-
prevention
Screen for presence of cancer
Increase in patients - earlier disease
Pharmacodynamic biomarker
Establish pharmacological dose
Surrogate marker of clinical efficacy
Early indication of proof of concept
Predictive reclassification of disease
Target therapy to those likely to
respond
Patient-specific toxicity prediction
Avoid adverse events, adjust dose
Fig. 4. Cancer diagnostics in drug development. There are six areas where diagnostics could help to
personalise cancer medicine.
Table 6.
The uncertainty of novel drugs for cancer.
Will the new generation of small molecule kinase inhibitors really make a difference, or
just be expensive palliation?
How will big pharma cope with most high value cytotoxics becoming generic by 2008?
Can expensive late stage attrition really be avoided in cancer drug development?
How will sophisticated molecular diagnostic services be provided?
Will effective surrogates for cancer preventive agents emerge?
Will patient choice involve cost considerations in guiding therapy?
by well-informed patients. All of this coupled with an environment where patients
are able to demonstrate choice, will help drive innovation towards those who stand
to benefit from it. However, inequity based on education, wealth and access will
still continue (Table 6).
Barriers to Innovation
Innovation in cancer treatment is inevitable (Dixon et al. 2003). The nature and
intensity of treatment will be critically influenced by the way innovation is rewarded.
However, there are certain prerequisites for the introduction of new therapies. First,
innovation must be translated into usable therapies that must be deliverable to the
right biological target, and to the right patient in a way that is acceptable to the
patient, the healthcare professional and society. Innovation must also be marketed
successfully to professionals, patients and those who pay the cost, so that they
all understand the potential benefits. Those making the investments in research
will create a market for innovation, even if the benefits achieved are minimal. The
 
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