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Abstract
Despite having been the first cancer vaccine to provide clear-cut evidence of biological and clinical efficacy as well as of clinical benefit in humans, idiotype vaccines have failed to become the first therapeutic cancer vaccine to be granted regulatory approval. Indeed, idiotypic vaccination is still an experimental therapeutic option for some types of B-cell malignancy over 20 years after its first use in patients with lymphoma. The ultimate reason for this situation lies in the recent failure of three large-scale, independent, randomized trials to achieve their respective main clinical end points. Interestingly, each trial had been designed with intrinsic pitfalls that are likely to have influenced, and perhaps even entirely compromized, all chances each study had to succeed. Therefore, it is difficult to conclude whether any of the different idiotype vaccines employed so far may still represent an ideal candidate for further trials. Meanwhile, other idiotype vaccine formulations are under active investigation.
Financial & competing interests disclosure
The authors have no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.
No writing assistance was utilized in the production of this manuscript.