Abstract
Background
Esophageal adenocarcinoma (EAC) has a poor prognosis; predictive markers of prognosis would facilitate advances in personalized therapy. C-reactive protein (CRP) and CRP-based scores are increasingly recommended across oncology; however, their role and value in EAC is unclear. This systematic review and meta-analysis examined CRP cut-point and scores and how they may best be applied in predicting survival in EAC.
Methods
A systematic literature search was conducted in EMBASE, Medline, Web of Science, Cochrane, Scopus and CINAHL databases, from inception to 1st October 2020. Studies reporting data from adults with EAC including adenocarcinoma of the gastro-esophageal junction (AEG), pre-treatment CRP or CRP-based score and Hazard Ratio (HR) for survival were included. QUIPS tool assessed risk of bias. Meta-analysis was undertaken.
Results
A total of 819 records were screened. Eight papers were included, with data for 1475 people. CRP cut-points ranged from 2.8 to 10 mg/L. The Glasgow Prognostic Score (GPS) and modified GPS were the most commonly reported scores. On meta-analysis, elevated preoperative GPS/mGPS was significantly associated with worse overall survival (hazards ratio [HR] 1.81, 95% confidence interval [CI] 1.25–2.62, p = 0.002); results were similar in subgroup analyses of multimodal treatment, M0 disease, and R0 resection.
Conclusions
This is the first review to evaluate comprehensively the evidence for CRP and CRP-based scores in EAC. Meta-analysis demonstrated that elevated preoperative GPS or mGPS was significantly associated with reduced overall survival in EAC, including AEG. There is insufficient evidence to support use of CRP alone. Future studies should examine GPS/mGPS in EAC prospectively, alone and combined with other prognostic markers.
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Acknowledgments
The authors thank Dr. Lina Zgaga, Dr. Noel Donlon, Dr. Ciarán Kenny, and Ms. Ailín Rogers for their helpful advice. Sincere thanks also to the research teams at Academic Department of Palliative Medicine, Our Lady’s Hospice & Care Services and Department of Surgery in Trinity Translational Medicine Institute for all their support in the conduct of the research.
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No funding support was obtained for this study. Template forms and collected data are available on request from the corresponding author.
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10434_2021_10988_MOESM3_ESM.docx
Supplementary file 3. Supplementary Fig. 1 Subgroup analyses of clinical characteristics. Forest plot of hazard ratios for overall survival in EAC, including AEG, classified by GPS/mGPS; studies included surgery (a) and chemotherapy (b) R0-R2 resection status
10434_2021_10988_MOESM4_ESM.docx
Supplementary file 4. Supplementary Fig. 2 Subgroup analysis of study characteristics. Forest plot of hazard ratios for overall survival in EAC, including AEG, classified by GPS/mGPS for studies conducted in the United Kingdom or Ireland
Appendix 1
Appendix 1
EMBASE
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1.
'esophagus tumor'/exp
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2.
‘Esophageal adenocarcinoma’/exp
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3.
‘Esophagus carcinoma’/exp
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4.
‘Esophagus cancer’/exp
-
5.
(esophag* NEAR/3 (cancer* OR neoplasm* OR tumor? OR tumour? OR adenocarcinoma* OR carcinoma*)):ab,ti
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6.
(oesophag* NEAR/3 (cancer* OR neoplasm* OR tumor? OR tumour? OR adenocarcinoma* OR carcinoma*)):ab,ti
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7.
#1 OR #2 OR #3 OR #4 OR #5 OR #6
-
8.
'c reactive protein'/exp
-
9.
('c-reactive protein' OR CRP OR 'creactive protein'):ti,ab
-
10.
'glasgow prognostic score'/exp OR 'modified glasgow prognostic score'/exp
-
11.
('glasgow prognostic score' OR GPS OR 'modified glasgow prognostic score' OR mGPS):ti,ab
-
12.
((‘C- reactive protein’ OR CRP) NEAR/2 (albumin OR ALB)):ti,ab
-
13.
(‘CRP/albumin ratio’ OR ‘CRP/ALB’):ti,ab
-
14.
#8 OR #9 OR #10 OR #11 OR #12 OR #13
-
15.
#7 AND #14
Medline
-
1.
Esophageal Neoplasms/
-
2.
(esophag* adj3 (cancer* OR neoplasm* OR tumor? OR tumour? OR adenocarcinoma* OR carcinoma)).ti,ab.
-
3.
(oesophag* adj3 (cancer* OR neoplasm* OR tumor? OR tumour? OR adenocarcinoma* OR carcinoma*)).ti,ab.
-
4.
or/1-3
-
5.
C-Reactive Protein/
-
6.
(c-reactive protein OR CRP OR creactive protein).ti,ab.
-
7.
(glasgow prognostic score OR GPS OR modified glasgow prognostic score OR mGPS).ti,ab.
-
8.
((C- reactive protein OR CRP OR creactive protein) adj2 (albumin OR ALB)).ti,ab.
-
9.
(CRP albumin ratio OR CRP ALB).ti,ab.
-
10.
or/5-9
-
11.
4 AND 10
CINAHL
-
1.
(MH "Esophageal Neoplasms")
-
2.
TI (esophag* N3 (cancer OR neoplasm*OR adenocarcinoma* OR tumo?r* OR carcinoma*)) OR AB (esophag* N3 (cancer OR neoplasm*OR adenocarcinoma* OR tumo?r* OR carcinoma*))
-
3.
TI (oesophag* N3 (cancer OR neoplasm*OR adenocarcinoma* OR tumo?r* OR carcinoma*)) OR AB (oesophag* N3 (cancer OR neoplasm*OR adenocarcinoma* OR tumo?r* OR carcinoma*))
-
4.
S1 OR S2 OR S3
-
5.
MH "C-Reactive Protein"
-
6.
TI (“C-Reactive Protein” OR “C Reactive Protein” OR “creactive protein”) OR AB (“C-Reactive Protein” OR “C Reactive Protein” OR “creactive protein” )
-
7.
TI (“glasgow prognostic score” OR GPS OR “modified glasgow prognostic score” OR mGPS) OR AB (“glasgow prognostic score” OR GPS OR “modified glasgow prognostic score” OR mGPS)
-
8.
TI ((‘C- reactive protein’ OR CRP OR “creactive protein”) N2 (albumin OR ALB)) OR AB ((‘C- reactive protein’ OR CRP OR “creactive protein”) N2 (albumin OR ALB))
-
9.
TI (“CRP albumin ratio” OR “CRP ALB”) OR AB ((‘C- reactive protein’ OR CRP OR “creactive protein”) N2 (albumin OR ALB))
-
10.
S5 OR S6 OR S7 OR S8 OR S9
-
11.
S4 AND S10
Web of Science
TS =(((esophag* NEAR/2 (cancer* OR neoplasm* OR tumor? OR tumour? OR adenocarcinoma* OR carcinoma*)) OR (oesophag* NEAR/2 (cancer* OR neoplasm* OR tumor? OR tumour? OR adenocarcinoma* OR carcinoma*))) AND ((“c-reactive protein” OR CRP OR “creactive protein”) OR (“glasgow prognostic score” OR GPS OR “modified glasgow prognostic score” OR mGPS) OR ((“C- reactive protein” OR CRP) NEAR/2 (albumin OR ALB)) OR (“CRP albumin ratio” OR “CRP ALB”)))
Cochrane Library
-
1.
[mh“Esophageal Neoplasms”]
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2.
(esophag* NEAR/3 (cancer OR neoplasm* OR tumor* OR tumour* OR adenocarcinoma* OR carcinoma*)):ti,ab,kw
-
3.
(oesophag* NEAR/3 (cancer OR neoplasm* OR tumor* OR tumour OR adenocarcinoma* OR carcinoma*)):ti,ab,kw
-
4.
#1 or #2 or #3
-
5.
[mh”C-Reactive Protein”]
-
6.
(“c-reactive protein” OR “c reactive protein” OR CRP OR “creactive protein”):ti,ab,kw
-
7.
(“glasgow prognostic score” OR GPS OR “modified glasgow prognostic score” OR mGPS):ti,ab,kw
-
8.
((“C- reactive protein” OR CRP OR “creactive protein”) NEAR/2 (albumin OR ALB)):ti,ab,kw
-
9.
(“CRP albumin ratio” OR “CRP ALB”):ti,ab,kw
-
10.
#5 OR #6 OR #7 OR #8 OR #9
-
11.
#4 AND #10
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Lorton, C.M., Higgins, L., O’Donoghue, N. et al. C-Reactive Protein and C-Reactive Protein-Based Scores to Predict Survival in Esophageal and Junctional Adenocarcinoma: Systematic Review and Meta-Analysis. Ann Surg Oncol 29, 1853–1865 (2022). https://doi.org/10.1245/s10434-021-10988-x
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DOI: https://doi.org/10.1245/s10434-021-10988-x