Time-of-Day Immunotherapy Administration and Outcomes in Advanced Cancers: A Systematic Review and - Summary - MDSpire

Time-of-Day Immunotherapy Administration and Outcomes in Advanced Cancers: A Systematic Review and

  • By

  • Shota Inoue

  • Ichiro Tsuboi

  • Marcin Miszczyk

  • Keiichiro Miyajima

  • Navid Roessler

  • Ahmed R. Alfarhan

  • Satoshi Katayama

  • Pierre I. Karakiewicz

  • Motoo Araki

  • Shahrokh F. Shariat

  • May 5, 2026

  • 0 min

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Objective:

To evaluate the association between the time of day of immune checkpoint inhibitor (ICI) administration and oncologic outcomes, specifically overall survival and progression-free survival, in patients with advanced solid tumors.

Key Findings:
  • 29 studies included, comprising 6129 patients, highlighting the need for further investigation into the timing of ICI administration.
  • Most studies were retrospective cohort studies (27 out of 29), indicating a potential bias in the findings.
  • Primary outcomes assessed were overall survival (OS) and progression-free survival (PFS), which are critical for evaluating treatment efficacy.
  • Significant heterogeneity observed among studies, necessitating sensitivity analyses to ensure robustness of results.
Interpretation:

The timing of ICI administration may influence treatment outcomes, suggesting potential benefits of chronotherapy in cancer treatment, warranting further exploration of underlying mechanisms.

Limitations:
  • Predominantly retrospective studies limit the strength of evidence, suggesting caution in interpretation.
  • Only one randomized clinical trial included, highlighting the need for more rigorous studies.
  • Variability in definitions of early vs late administration and cancer types may affect the generalizability of findings.
Conclusion:

Chronomodulated immunotherapy may enhance treatment efficacy, warranting further investigation in prospective trials to validate these findings and explore optimal administration timing.

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