Monday 6 January 2020

Rs of radiobiology

The most important biological factors influencing tumor and normal tissue responses to fractionated treatment are referred to as the Rs [1]:

  1. Repair [1]/Recovery [2];
  2. Re-assortment/Redistribution [1,2];
  3. Repopulation [1,2];
  4. Reoxygenation [1,2];
  5. Radiosensitivity [1,2];
  6. Reactivation of anti-tumor immune response [1];
  7. intrinsic Radiosensitivity [2];
  8. iRradiated volume [2];
  9. long-term Restoration [2];
  10. molecular Radiopathology [2].

Bibliographic references:
[1] Boustani J, Grapin M, Laurent PA, Apetoh L, Mirjolet C. The 6th R of Radiobiology: Reactivation of Anti-Tumor Immune Response. Cancers (Basel). 2019 Jun 20;11(6):860. Available at: https://dx.doi.org/10.3390%2Fcancers11060860.
[2] Dörr W. Radiobiology of tissue reactions. Ann ICRP. 2015;44(1 Suppl):58–68. Available at: https://doi.org/10.1177/0146645314560686.

Wednesday 1 January 2020

PD-1 checkpoint inhibitors

A PD-1 (programmed cell death protein 1) inhibitor fairy tale:


How do tumors use PD-1 to cause T-cell exhaustion? Learn how overexpression of PD-1 receptors on T cells may lead to T-cell exhaustion:

ESTRO-ASTRO definition of oligometastatic disease - public comment survey

The deadline to submit comments is Monday, January 6th, 2020: ESTRO-ASTRO definition of oligometastatic disease - public comment survey.