It was hypothesized that inflammation affects the tumor response to radiotherapy (RT). To comprehend the varying RT efficacy in patients with painful bone metastases, clinical investigations to examine the link between inflammatory indicators and RT response are necessary to comprehend the varying RT efficacy in patients with painful bone metastases. For a study, researchers sought to assess, in patients with uncomfortable bone metastases, the relationship between inflammatory markers and analgesic response to radiotherapy.

The prospective and longitudinal analysis included adult patients from 7 European research sites receiving RT for uncomfortable bone metastases. Univariate regression models were used to examine the relationships between RT responsiveness and 17 inflammatory markers at baseline and the changes in inflammatory markers between baseline and three and eight weeks after RT. In addition, baseline analyses were modified to account for putative clinical RT response factors.

In the examination of 448 individuals with complete baseline data, none of the inflammatory indicators were substantially related to an impending RT response. The 3-week change in TNF (P 0.017), IL-8 (P 0.028), IP-10 (P 0.032), eotaxin (P 0.043), G-CSF (P 0.033), and MCP-1 (P 0.002) were favorably linked with RT response in patients who were available for follow-up, but the three-week change in CRP (P 0.006) was adversely associated.

The study’s findings suggested that inflammation may be necessary for patients with painful bone metastases to experience an analgesic RT response and that there was a correlation between RT responsiveness and changes in pro-inflammatory mediators. However, none of the inflammatory indicators under investigation were discovered to be pre-treatment predictors of RT response.

Reference: jpsmjournal.com/article/S0885-3924(22)00791-6/fulltext