OnCo
ideasIdea

Confirm ultra-low-dose immunotherapy so it can be afforded where most patients live

A trial in India found that adding a very small dose of an immunotherapy drug, about a twentieth of the usual amount, to chemotherapy improved survival in head and neck cancer. If confirmed, this could make immunotherapy affordable for millions.

Randomised confirmatory trials of very-low-dose PD-1 blockade (e.g., nivolumab 20 mg every three weeks, as tested at Tata Memorial in head and neck cancer with an OS benefit versus chemotherapy alone) in additional indications and against standard-dose immunotherapy, with PK and receptor-occupancy sub-studies, and a regulatory pathway for low-dose labels or guideline recommendations in resource-limited settings. Uncertainty is substantial: the evidence base is a single-centre trial and non-inferiority to full dose has not been shown.

Hypothesis
Ultra-low-dose PD-1 blockade will show a survival benefit over chemotherapy alone in at least one further indication and will be within a pre-specified non-inferiority margin of standard dose in a direct comparison, at under 10 percent of the drug cost.
Rationale
Receptor occupancy and early PK studies suggest saturation at doses well below label; the Tata trial provides randomised clinical evidence, and the access gap is the largest single inequity in modern oncology.
What would test it
A multicentre randomised trial in India and one African network comparing low-dose nivolumab plus chemotherapy with chemotherapy alone in NSCLC or cervical cancer, plus a non-inferiority arm against standard dose where affordable.
Maturity
early clinical
Who has to act
research
Cost to try
Medium ($1M to $50M)
Years to first evidence
3
Bottlenecks it attacks
  • Wrong doses · Most drug doses were chosen as the highest a person can tolerate, which is often more than they need.
  • Most of the world has almost no cancer care · Seven in ten cancer deaths happen in low- and middle-income countries, where radiotherapy, pathology, surgery and drugs are scarce.
  • Prices and value · New cancer drugs routinely cost over $150,000 a year, often for months of benefit. Systems cannot afford them and patients go bankrupt.

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