CYFRA21-1 and CEA are useful markers for predicting the sensitivity to chemoradiotherapy of esophageal squamous cell carcinoma.
BACKGROUND
Chemoradiotherapy (CRT) is currently performed for patients with advanced esophageal carcinoma. Sensitivity of tumours to CRT differs from one case to another and may be influenced by the expression of biological molecules. The aim of this study was to identify biological markers which could predict sensitivities of esophageal squamous cell carcinoma (ESCC) to CRT.


METHODS
A total of 84 patients with stage I-IV ESCC were evaluated. The cytokeratin 19 fragment antigen 21-1 (CYFRA21-1) and carcinoembryonic antigen (CEA) levels were measured before CRT by enzyme-linked immunosorbent assays in patients with primary ESCCs using 3.4 ng ml(-1) and 3.3 ng ml(-1), respectively, as cut-off values. The relationships between pretreatment expression of CYFRA 21-1 and CEA and the effectiveness of CRT were analysed.


RESULTS
The complete response (CR) rates of the primary tumours estimated by computed tomography in patients with high levels of CYFRA21-1 and CEA were 10% (3/30) and 4.2% (1/24), while in cases with low CYFRA21-1 and CEA the CR rates were 50% (27/54) and 48.3% (29/60), respectively (p = 0.002 and 0.003). The effective rates (CR+PR) in CYFRA21-1 high and low groups were 60% (18/30) and 96.3% (52/54), while in CEA high and low groups they were 58.3% (14/24) and 93.3% (56/60), respectively (p = 0.013 and 0.013).


CONCLUSIONS
CYFRA21-1 and CEA may be helpful in predicting the responsiveness in ESCC of primary lesions to CRT, although the results should be confirmed in larger, more homogeneous studies.
Yi
Yan
Y
Shangdong Tumour Hospital, Jinan, China.
Li
Baosheng
B
Wang
Zhongtang
Z
Sun
Hongfu
H
Gong
Heyi
H
Zhang
Zicheng
Z
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000951:Antigens, Neoplasm / Q000097:blood*; D014408:Biomarkers, Tumor / Q000097:blood*; D002272:Carcinoembryonic Antigen / Q000097:blood*; D002294:Carcinoma, Squamous Cell / Q000097:blood / Q000628:therapy*; D003131:Combined Modality Therapy; D004358:Drug Therapy; D004938:Esophageal Neoplasms / Q000097:blood / Q000628:therapy*; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D053539:Keratin-19 / Q000097:blood*; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011379:Prognosis; D011878:Radiotherapy; D016896:Treatment Outcome
D000951:Antigens, Neoplasm; D014408:Biomarkers, Tumor; D002272:Carcinoembryonic Antigen; D053539:Keratin-19; C102012:antigen CYFRA21.1