An LED Light Source and Novel Fluorophore Combinations Improve Fluorescence Laparoscopic Detection of Metastatic Pancreatic Cancer in Orthotopic Mouse Models - 23/05/12
Correspondence address: Michael Bouvet, MD, FACS, Department of Surgery, Moores UCSD Cancer Center, 3855 Health Science Dr #0987, La Jolla, CA 92093-0987Résumé |
Background |
The aim of this study was to improve fluorescence laparoscopy of pancreatic cancer in an orthotopic mouse model with the use of a light-emitting diode (LED) light source and optimal fluorophore combinations.
Study Design |
Human pancreatic cancer models were established with fluorescent FG-RFP, MiaPaca2-GFP, BxPC-3-RFP, and BxPC-3 cancer cells implanted in 6-week-old female athymic mice. Two weeks postimplantation, diagnostic laparoscopy was performed with a Stryker L9000 LED light source or a Stryker X8000 xenon light source 24 hours after tail-vein injection of CEA antibodies conjugated with Alexa 488 or Alexa 555. Cancer lesions were detected and localized under each light mode. Intravital images were also obtained with the OV-100 Olympus and Maestro CRI Small Animal Imaging Systems, serving as a positive control. Tumors were collected for histologic analysis.
Results |
Fluorescence laparoscopy with a 495-nm emission filter and an LED light source enabled real-time visualization of the fluorescence-labeled tumor deposits in the peritoneal cavity. The simultaneous use of different fluorophores (Alexa 488 and Alexa 555), conjugated to antibodies, brightened the fluorescence signal, enhancing detection of submillimeter lesions without compromising background illumination. Adjustments to the LED light source permitted simultaneous detection of tumor lesions of different fluorescent colors and surrounding structures with minimal autofluorescence.
Conclusions |
Using an LED light source with adjustments to the red, blue, and green wavelengths, it is possible to simultaneously identify tumor metastases expressing fluorescent proteins of different wavelengths, which greatly enhanced the signal without compromising background illumination. Development of this fluorescence laparoscopy technology for clinical use can improve staging and resection of pancreatic cancer.
Le texte complet de cet article est disponible en PDF.Abbreviations and Acronyms : GFP, LED, RFP, RGB
Plan
| Disclosure Information: Dr Lee received a salary from UVP (Ultraviolet Products), LLC; Dr Luiken is the Chief Scientific Officer and stockholder in OncoFluor, Inc; and Dr Hoffman is the President and stockholder in AntiCancer, Inc. All other authors have nothing to declare. |
|
| This work was supported in part by grants from the National Cancer Institute CA142669 and CA132971 (to Dr Bouvet and AntiCancer, Inc) and T32 training grant CA121938-5 (to Dr Metildi). |
Vol 214 - N° 6
P. 997 - juin 2012 Retour au numéro
Article précédent
- Intraoperative Resident Education for Robotic Laparoscopic Gastric Banding Surgery: A Pilot Study on the Safety of Stepwise Education
- Daniel A. Hashimoto, Ernest D. Gomez, Enrico Danzer, Paula K. Edelson, Jon B. Morris, Noel N. Williams, Kristoffel R. Dumon
- Early Tracheostomy Is Associated With Improved Outcomes in Patients Who Require Prolonged Mechanical Ventilation after Cardiac Surgery
- Jagan Devarajan, Amaresh Vydyanathan, Meng Xu, Sudish M. Murthy, Kenneth R. McCurry, Daniel I. Sessler, Joseph Sabik, C. Allen Bashour
Bienvenue sur EM-consulte, la référence des professionnels de santé.
L’accès au texte intégral de cet article nécessite un abonnement.
Déjà abonné à cette revue ?