Abstract
Objectives
To investigate the association of computed tomography-assessed body composition with survival outcomes of metastatic renal cell carcinoma (mRCC) received immunotherapy.
Methods
In this multicenter, retrospective study, we reviewed 251 mRCC patients who received anti-PD1 from five centers. We analyzed the relationship between BMI, skeletal muscle area (SM), subcutaneous adipose tissue (SAT), visceral adipose tissue (VAT), and subcutaneous adipose percentage (SAT%) with progression-free survival (PFS) and overall survival (OS). The spatial localization T cells was investigated by multiplex immunofluorescence.
Results
Among 224 evaluable patients, 23 (10.3%) patients were underweight, 118 (52.7%) had normal weight, 65 (29%) were overweight, and 18 patients (8%) were obese. The median age was 55 years and most patients were male (71%). No significant improvement in PFS (HR, 0.61; 95% CI, 0.27–1.42) or OS (HR, 1.09; 95% CI, 0.38–3.13) was observed for the obese patients. Besides, SM, VAT, and SAT were not associated with survival outcomes (all p > 0.05). Interestingly, SAT% independently predicted PFS (as continuous variable, HR: 0.02; 95% CI, 0.01–0.11) and OS (HR:0.05; 95% CI, 0.01–0.39), which remained significant in multivariate modeling (as continuous variable, adjusted HR for PFS, 0.01; 95% CI, 0.00–0.04; adjusted HR for OS, 0.08; 95% CI, 0.01–0.72). These associations were consistent in subgroup analysis of different gender, BMI, PD-L1 positive, and sarcopenia group. Tumor of high SAT% patients had a higher intratumoral PD1+ CD8+ T cell density and ratio.
Conclusion
High SAT% predicts better outcomes in mRCC patients treated with anti-PD1 and T cell location may account for the better response.
Key Points
• CT-based subcutaneous adipose percentage independently predicted progression-free survival and overall survival.
• Patients with a higher subcutaneous adipose percentage had a higher intratumoral PD1 + CD8 + T cell density and ratio.
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Abbreviations
- BMI:
-
Body mass index
- FFPE:
-
Formalin-fixed paraffin-embedding
- HFD:
-
High-fat diet
- ICIs:
-
Immune checkpoint inhibitors
- IRB:
-
Institutional review board
- mIHC:
-
Immunofluorescence
- mRCC:
-
Metastatic renal cell carcinoma
- OS:
-
Overall survival
- PFS:
-
Progression-free
- SAT%:
-
Subcutaneous adipose percentage
- SAT:
-
Subcutaneous adipose tissue
- SM:
-
Skeletal muscle area
- TKI:
-
Tyrosine kinase inhibitor
- TME:
-
Tumor microenvironment
- VAT:
-
Visceral adipose tissue
- WHO:
-
World Health Organization
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Acknowledgements
We thank all the patients who participated in this study.
Funding
This study was supported by the National Natural Science Foundation of China (No. 82203288, 82203320, 81972382, 82273031, 82273311, and 81872091), Medical Scientific Research Foundation of GuangDong Province (A2022492), China National Postdoctoral Program for Innovative Talents (No. BX20220363), and the Natural Science Foundation for Distinguished Young Scholars of Guangdong Province (No. 2021B1515020077).
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The scientific guarantor of this publication is Zhiling Zhang.
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The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.
Statistics and biometry
No complex statistical methods were necessary for this paper.
Informed consent
The written patient informed consent was obtained from each participating center and for some cases waiver of consent was been approved by the IRB at the corresponding center.
Ethical approval
This study has been approved by the institutional review board (IRB) and the ethical committee of Sun Yat-sen University Cancer Center and was conducted in accordance with ethical principles for medical research involving human subjects reported in the Declaration of Helsinki and its later amendments.
Methodology
• Retrospective
• observational
• multicenter study
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Wang, J., Dong, P., Qu, Y. et al. Association of computed tomography-based body composition with survival in metastatic renal cancer patient received immunotherapy: a multicenter, retrospective study. Eur Radiol 33, 3232–3242 (2023). https://doi.org/10.1007/s00330-022-09345-7
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DOI: https://doi.org/10.1007/s00330-022-09345-7