Biotin-streptavidin system-mediated folate receptor-targeted quantum dot in vitro imaging of ovarian cancer SKOV3 cells / 中国肿瘤临床
Chinese Journal of Clinical Oncology
;
(24): 1254-1258, 2014.
Article
in Chinese
| WPRIM
| ID: wpr-471565
ABSTRACT
Objective:
To develop a biotin-streptavidin system (BAS)-mediated folate receptor (FR)-targeted quantum dot (QD) fluorescent probe and preliminarily validate the targeting ability and signal amplification effect of the probe.Methods:
Streptavidin (SA) was covalently coupled with QD through the active ester method;the physical characteristics of the prepared QD-SA were veri-fied. Biotinylated folate was synthesized through the carrier bovine serum albumin using the same method and then reacted with QD-SA to form the special probe. The probe was used to identify SKOV3 cells and FR-negative A549 cells to verify its targeting speci-ficity. QD-SA was used as the contrast. SKOV3 cells were imaged using the BAS-mediated FR-targeted QD probe with a biotinylated folate incubation time of 1 or 4 h. Various reaction times were also tested between the probe and the QD-FA that was formed without BAS mediation.Results:
The BAS-mediated FR-targeted QD probe specifically recognized FR-positive SKOV3 cells. The probe ob-tained higher fluorescent intensity after 4 h than after 1 h of biotinylated folate incubation. The BAS-mediated FR-targeted QD probe al-so had a stronger fluorescent signal than the QD-FA probe.Conclusion:
The proposed probe presents a great potential in the early diag-nosis of ovarian cancer because of its high specificity and sensitivity.
Full text:
Available
Index:
WPRIM (Western Pacific)
Type of study:
Prognostic study
/
Screening study
Language:
Chinese
Journal:
Chinese Journal of Clinical Oncology
Year:
2014
Type:
Article
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