Endoscopic Optical Imaging for Precision Oncology Treatment Applied to Colorectal Tumours (Elios-Color-on-Specimen)

Colorectal Cancer Clinical Trial

Official title:

Endoscopic Optical Imaging for Precision Oncology Treatment Applied to Colorectal Tumours

Clinical Trial Details — Status: Withdrawn

Administrative data

• NCT number: NCT04101292
• Other study ID #: 19-004
• Status: Withdrawn
• Phase: N/A
• Start date: April 2021
• Est. completion date: June 2023

Study information

• Verified date: March 2022
• Source: IHU Strasbourg
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The Institute of Image-Guided Surgery (IHU) of Strasbourg is a translational research Institute aiming to develop hybrid surgery techniques. The IHU-SPECTRA research unit, entirely dedicated to the development of fluorescence-guided surgery, was set up to test several innovations as part of a large-scale project (ELIOS: Endoscopic Luminescent Imaging for Precision Oncology Surgery), funded by the ARC Foundation for Cancer Research. The proposed research protocol is part of the ELIOS project and targets in particular colon tumours.

The Holy Grail in oncology surgery is the radical removal of cancer cells in order to reduce the rate of tumour recurrences and increase the tumour's free survival.

The administration of a tumour-specific antibody, which fluoresces in the Near-Infrared ranges and which could be univocally recognized at a tumour cellular level, could provide a rapid and accurate evaluation of radical tumour removal.

The University Medical Center Groningen (UMCG) has developed a fluorescent tracer coupling Bevacizumab (which targets the Vascular Endothelial Growth Factor = VEGF) with a fluorescent dye, the IRDye800. The initial human results are very promising and no adverse events linked to the fluorescent molecule have been reported.

In parallel, an alternative optical technique that does not require the use of a fluorophore, the Hyperspectral Imaging (HSI), is a relatively new method used in image-guided and precision surgery. The company Diaspective Vision GmbH (Pepelw, Germany) produces a HSI camera, the TIVITA system, enabling to obtain spectral information from the tissues. The main advantage of HSI over fluorescence imaging is in that it is a contrast-free imaging and intrinsically quantitative although it does not provide real-time videos.

Another innovative optical imaging technology available at the IHU is FF-OCT (Light-CT Scanner, LLTechSAS, Paris, France) which allows non-destructive and high-resolution optical biopsy without tissue treatment.

The working hypothesis is that molecular fluorescence enhanced-reality allows greater precision in the differentiation of tumour tissue and healthy tissue in patients with colorectal cancer compared to the immunohistochemistry conventionally used in anatomopathology.

In parallel, this technique will be compared to hyperspectral imaging (HSI TIVITA system) and optical imaging (FF-OCT system), two potentially advantageous methods for the detection of tumour tissue.

Description:

The Institute of Image-Guided Surgery (IHU) of Strasbourg is a translational research Institute aiming to develop hybrid surgery techniques, less invasive and image-guided to improve the therapeutic results, in the emerging context of the precision medicine.

One of those expanding technique is fluorescence imaging that can guide the surgical procedure very accurately.

The IHU-SPECTRA research unit, entirely dedicated to the development of fluorescence-guided surgery, was set up at the IHU Strasbourg. Currently represented by a network of scientists from different fields and by industrial and academic partners in France and abroad, its short-term goals are mainly the implementation and evaluation in current clinical practice of the techniques already developed. In the long term, it is planned to test several innovations as part of a large-scale project (ELIOS: Endoscopic Luminescent Imaging for Precision Oncology Surgery), funded by the ARC Foundation for Cancer Research.

The proposed research protocol is part of the ELIOS project and targets in particular colon tumours.

The Holy Grail in oncology surgery is the radical removal of cancer cells in order to reduce the rate of tumour recurrences and increase the tumour's free survival. Tumour involvement at the resection margins is the most important predictor of tumour recurrence, leading to high recurrence rate.

However, surgery and other minimally-invasive ablative procedures are currently limited by 1) the need of wide removal of healthy tissue in order to ensure negative margins (which might lead to functional deficits and increases the risks of complications) and 2) frozen sections analysis to verify the surgical margins. They are time consuming and require considerable human resources.

The administration of a tumour-specific antibody, which fluoresces in the Near-Infrared ranges and which could be univocally recognized at a tumour cellular level, could provide a rapid and accurate evaluation of radical tumour removal. In the context of precision surgery, the development of tumour-specific fluorescent probes has made remarkable advances over recent years, with promising pre-clinical proofs of the concept, allowing for the enhanced identification of tumour residuals and metastatic lymph nodes. Recently, in a pioneer paper published on Nature, the first human case of tumour-specific fluorescence-guided surgery has been reported. Authors could remove effectively 34 intra-peritoneal implants of ovarian cancer metastasis, which were completely invisible at the naked eye. This impressive proof of the concept highlights clearly the potential impact of intraoperative tumour-specific molecular fluorescence imaging.

There is an increasing number of targeted probes which are being developed to visualize cancer cells, enabling early stage cancer detection and precise tumour resection. Particularly interesting is the strategy of coupling a fluorescent dye (IRDye800CW) with the humanized monoclonal antibodies, currently used in anticancer therapy.

The University Medical Center Groningen (UMCG), which is a strong partner of the IHU-SPECTRA unit, has developed a fluorescent tracer coupling Bevacizumab (which targets the Vascular Endothelial Growth Factor = VEGF) with the IRDye800.

The initial human results obtained together with the company Surgvision (Groningue, Pays-Bas) are very promising and have reported no adverse events linked to the fluorescent.

Bevacizumab-IRDye800CW can be either intravenously perfused or locally applied, the local application being more efficient than the perfusion.

In parallel, an alternative optical technique that does not require the use of a fluorophore will be tested. This technology, the Hyperspectral Imaging (HSI), is a relatively new method used in image-guided and precision surgery, which has shown promising results for recognition/characterization of tissues/tumours, and comprehensive assessment of physiologic tissue parameters, such as perfusion, oxygenation, and water content. Hence, it has been applied predominantly in wound imaging and -management in plastic surgery transplants, vascular surgery, chronical wounds and burn injuries.

The HSI system from a German start-up (Diaspective Vision GmbH, Pepelw, Germany) has been acquired. The company produces a HSI camera, the TIVITA system, enabling to obtain spectral information from the tissues. The only limitation, when applied to minimally-invasive surgery, is in that the TIVITA provides pictures and not real-time videos.

The main advantage of HSI over fluorescence imaging is in that it is a contrast-free imaging and intrinsically quantitative. Those characteristics make of the HSI a very promising tool in image-guided surgery, and open several windows of opportunity in terms of research programs towards miniaturization and optimization of the image-flow and artificial intelligence (AI) algorithms of tissue recognition.

Another innovative optical imaging technology available at the IHU is FF-OCT (Light-CT Scanner, LLTechSAS, Paris, France). This technology allows non-destructive and high-resolution optical biopsy without tissue treatment. The images are generated by measuring the backscattered light produced by the interaction between light and tissues of different indices. This technology has already shown its significant potential in oncology, particularly for ovarian, brain, mammary and pancreatic tissues. If validated, it could in the future complement or even replace traditional pathology, since it provides high-resolution images in a short time, without the need for treatment or staining.

The working hypothesis is that molecular fluorescence enhanced-reality allows greater precision in the differentiation of tumour tissue and healthy tissue in patients with colorectal cancer compared to the immunohistochemistry conventionally used in anatomopathology.

In parallel, this technique will be compared to hyperspectral imaging (HSI TIVITA system) and optical imaging (FF-OCT system), two potentially more advantageous methods for the detection of tumour tissue.

Recruitment information / eligibility

• Status: Withdrawn
• Enrollment: 0
• Est. completion date: June 2023
• Est. primary completion date: April 2023
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

1. Man or woman over 18 years old

2. Patient with colorectal cancer

3. Patient able to receive and understand information related to the study and to give written informed consent.

4. Patient affiliated to the French social security system

Exclusion Criteria:

1. Pregnant or lactating patient

2. Patient in exclusion period (determined by a previous or a current study)

3. Patient under guardianship or trusteeship

4. Patient under the protection of justice

Related Conditions & MeSH terms

• Colorectal Cancer
• Colorectal Neoplasms

Intervention

Other:
• Characterization of tumor tissue by fluorescence
HSI Imaging of the resected specimen, from the serum and the mucous side FF-OCT imaging of the tumor and the healthy tissue biopsies Local application of Bevacizumab-IRDye800CW and visualization with the Surgvision Explorer system Standard anti-VEGF Immunohistochemistry and pathology

Locations

Country	Name	City	State
n/a

Sponsors (2)

Lead Sponsor	Collaborator
IHU Strasbourg	ARC Foundation for Cancer Research

References & Publications (24)

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Nagengast WB, Hartmans E, Garcia-Allende PB, Peters FTM, Linssen MD, Koch M, Koller M, Tjalma JJJ, Karrenbeld A, Jorritsma-Smit A, Kleibeuker JH, van Dam GM, Ntziachristos V. Near-infrared fluorescence molecular endoscopy detects dysplastic oesophageal lesions using topical and systemic tracer of vascular endothelial growth factor A. Gut. 2019 Jan;68(1):7-10. doi: 10.1136/gutjnl-2017-314953. Epub 2017 Dec 15. — View Citation

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Tran Cao HS, Kaushal S, Metildi CA, Menen RS, Lee C, Snyder CS, Messer K, Pu M, Luiken GA, Talamini MA, Hoffman RM, Bouvet M. Tumor-specific fluorescence antibody imaging enables accurate staging laparoscopy in an orthotopic model of pancreatic cancer. Hepatogastroenterology. 2012 Sep;59(118):1994-9. doi: 10.5754/hge11836. — View Citation

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* Note: There are 24 references in all — Click here to view all references

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Evaluation of the sensitivity of Bevacizumab-IRDye800 to visualize tumour tissue relative to surrounding healthy tissue by the means of fluorescence intensity measurements	Correlation between the fluorescence signal intensity of Bevacizumab-IRDye800CW emitted by tumours and sensed by near-infrared imaging systems compared to the fluorescence emitted by healthy tissue	1 day
Primary	Evaluation of the sensitivity of Bevacizumab-IRDye800 to visualize tumour tissue compared to anti-VEGF antibodies by the means of fluorescence intensity measurements	Correlation between the fluorescence signal intensity of Bevacizumab-IRDye800CW emitted by tumours and sensed by near-infrared imaging systems compared to VEGF expression levels in immunohistochemistry and histological diagnosis	1 day
Secondary	Ability of Hyperspectral Imaging (HSI) to detect the tumour area on the serosal side before marking the margins of resection by the means of spectral signature characterization	Correlation of the spectral signatures between healthy and tumour bearing segments from the serosa side, obtained by HSI before marking the margins of resection	1 day
Secondary	Ability of HSI to detect the tumour area on the serosal side after marking the margins of resection by the means of spectral signature characterization	Correlation of the spectral signatures between healthy and tumour bearing segments from the serosa side, obtained by HSI after marking the margins of resection	1 day
Secondary	Ability of HSI to determine the tumour stage from the serosal side	Correlation of the tumour stage specific spectral features obtained from the serosal side with the final histopathological tumour stage	1 day
Secondary	HSI's ability to identify the tumoural and healthy tissue from the mucosal side compared to the results provided by histopathology and immunohistochemistry (IHC).	Determination of the presence or absence of spectral signature obtained by HSI on two regions of interest (one located in the tumour and the other outside the tumour) and correlation with standard pathology and IHC	1 day
Secondary	Level of accuracy of resection of a fluorescence-guided tumour determined by the presence or absence of tumourous cells on resection margins by histological examination	Evaluation of the efficiency of fluorescence-guided full-thickness resection by histopathologically evaluating the presence or absence of tumours on resection margins	1 day
Secondary	Level of accuracy of fluorescence microscopy compared to ImmunoHistoChemistry	Comparison of the fluorescence signal intensity detected within and outside the tumour by fluorescence microscopy and immunohistochemical analysis	1 day
Secondary	Level of accuracy of Full-field optical coherence tomography (FF-OCT) by the means of a qualitative analysis	Qualitative analysis with FF-OCT of untreated biopsies compared to frozen sections and standard pathology	1 day