Screening and selection of peptides specific for esophageal cancer cells from a phage display peptide library.
BACKGROUND
Esophageal cancer is a common malignant tumor of the gastrointestinal tract and is typically diagnosed at an advanced stage due to the absence of early clinical symptoms. Although surgery, chemotherapy, and radiotherapy represent the major treatment methods employed for this cancer, the prognosis of esophageal cancer remains poor.


METHODS
A Ph.D.-12TM Phage Display Peptide Library was screened using an esophageal cancer cell line, Eca109, and a normal esophageal epithelial cell line to identify novel ligands that selectively bind the surface of esophageal cancer cells with high affinity.


RESULTS
Two polypeptides were isolated that exhibited higher binding affinities and specificity for the Eca109 cells. These peptides were further validated using enzyme-linked immunosorbent assays (ELISAs), immunofluorescence assays, and immunohistochemistry assays.


CONCLUSIONS
Two polypeptides with high binding affinities to esophageal cancer cells were isolated from the Ph.D.-12 Phage Display Peptide Library. Further studies are needed to characterize the biological effects of these polypeptides and to explore the potential for these peptides to be used for the early screening of esophageal cancer or for cell-targeted therapies that would reduce the toxic side effects of cancer treatment.
Zhe-Feng
ZF
Zhang
Xue
X
Shan
Yong-Xin
YX
Wang
Wei
W
Wang
Shi-Yun
SY
Feng
Department of Thoracic Surgery, The First Hospital of Jilin University, 71 Xinmin Street, 130021 Changchun, China. doctorcyb@163.com.
You-Bin
YB
Cui
D014408:Biomarkers, Tumor / Q000032:analysis* / Q000235:genetics; D045744:Cell Line, Tumor; D061505:Cell Surface Display Techniques / Q000379:methods*; D004273:DNA, Neoplasm / Q000235:genetics*; D004797:Enzyme-Linked Immunosorbent Assay; D004847:Epithelial Cells / Q000737:chemistry / Q000473:pathology; D004938:Esophageal Neoplasms / Q000737:chemistry* / Q000235:genetics / Q000473:pathology; D005820:Genetic Testing / Q000379:methods*; D006801:Humans; D007150:Immunohistochemistry; D019151:Peptide Library; D010455:Peptides / Q000032:analysis / Q000235:genetics; D015203:Reproducibility of Results; D017422:Sequence Analysis, DNA
D014408:Biomarkers, Tumor; D004273:DNA, Neoplasm; D019151:Peptide Library; D010455:Peptides