1
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Fusco JC, Abdelhafeez AH, Krauel L, Honeyman JN, Ehrlich PF, Wijnen M, Lautz TB, Pachl M, Malek MM. Imaging adjuvants in pediatric surgical oncology. Pediatr Blood Cancer 2024:e31241. [PMID: 39101518 DOI: 10.1002/pbc.31241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 07/18/2024] [Accepted: 07/19/2024] [Indexed: 08/06/2024]
Abstract
Surgery is a crucial component of pediatric cancer treatment, but conventional methods may lack precision. Image-guided surgery, including fluorescent and radioguided techniques, offers promise for enhancing tumor localization and facilitating precise resection. Intraoperative molecular imaging utilizes agents like indocyanine green to direct surgeons to occult deposits of tumor and to delineate tumor margins. Next-generation agents target tumors directly to improve specificity. Radioguided surgery, employing tracers like metaiodobenzylguanidine (MIBG), complements fluorescent techniques by allowing for detection of tumors at a greater depth. Dual-labeled agents combining both modalities are under development. Three-dimensional modeling and virtual/augmented reality aid in preoperative planning and intraoperative guidance. The above techniques show great promise to benefit patients with pediatric tumors, and their continued development will almost certainly improve surgical outcomes.
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Affiliation(s)
- Joseph C Fusco
- Department of Pediatric Surgery, Monroe Carell Jr. Children's Hospital, Vanderbilt University, Nashville, Tennessee, USA
| | | | - Lucas Krauel
- Department of Surgery, St. Joan de Deu Barcelona Children's Hospital, Barcelona, Spain
| | - Joshua N Honeyman
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Peter F Ehrlich
- Division of Pediatric Surgery, C.S. Mott Children's Hospital, University of Michigan, Ann Arbor, Michigan, USA
| | - Marc Wijnen
- Department of Pediatric Surgery, Princess Maxima Center for Pediatric Oncology, Utrecht, Netherlands
| | - Timothy B Lautz
- Department of Surgery, Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University, Chicago, Illinois, USA
| | - Maximillian Pachl
- Department of Surgery, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK
| | - Marcus M Malek
- Division of Pediatric General and Thoracic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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2
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Jeremiasse B, van Ineveld RL, Bok V, Kleinnijenhuis M, de Blank S, Alieva M, Johnson HR, van Vliet EJ, Zeeman AL, Wellens LM, Llibre-Palomar G, Barrera Román M, Di Maggio A, Dekkers JF, Oliveira S, Vahrmeijer AL, Molenaar JJ, Wijnen MH, van der Steeg AF, Wehrens EJ, Rios AC. A multispectral 3D live organoid imaging platform to screen probes for fluorescence guided surgery. EMBO Mol Med 2024; 16:1495-1514. [PMID: 38831131 PMCID: PMC11251264 DOI: 10.1038/s44321-024-00084-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 05/13/2024] [Accepted: 05/21/2024] [Indexed: 06/05/2024] Open
Abstract
Achieving complete tumor resection is challenging and can be improved by real-time fluorescence-guided surgery with molecular-targeted probes. However, pre-clinical identification and validation of probes presents a lengthy process that is traditionally performed in animal models and further hampered by inter- and intra-tumoral heterogeneity in target expression. To screen multiple probes at patient scale, we developed a multispectral real-time 3D imaging platform that implements organoid technology to effectively model patient tumor heterogeneity and, importantly, healthy human tissue binding.
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Affiliation(s)
- Bernadette Jeremiasse
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Ravian L van Ineveld
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Veerle Bok
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Michiel Kleinnijenhuis
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Sam de Blank
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Maria Alieva
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Instituto de Investigaciones Biomedicas Sols-Morreale (IIBM), CSIC-UAM, Madrid, Spain
| | - Hannah R Johnson
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Esmée J van Vliet
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Amber L Zeeman
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Lianne M Wellens
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Gerard Llibre-Palomar
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Mario Barrera Román
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Alessia Di Maggio
- Pharmaceutics, Department of Pharmaceutical Sciences, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG, Utrecht, The Netherlands
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Science Faculty, Utrecht University, 3584 CH, Utrecht, The Netherlands
| | - Johanna F Dekkers
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Sabrina Oliveira
- Pharmaceutics, Department of Pharmaceutical Sciences, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG, Utrecht, The Netherlands
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Science Faculty, Utrecht University, 3584 CH, Utrecht, The Netherlands
| | | | - Jan J Molenaar
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - Marc Hwa Wijnen
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | | | - Ellen J Wehrens
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Anne C Rios
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands.
- Oncode Institute, Utrecht, The Netherlands.
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3
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Giuliani S, Paraboschi I, McNair A, Smith M, Rankin KS, Elson DS, Paleri V, Leff D, Stasiuk G, Anderson J. Monoclonal Antibodies for Targeted Fluorescence-Guided Surgery: A Review of Applicability across Multiple Solid Tumors. Cancers (Basel) 2024; 16:1045. [PMID: 38473402 DOI: 10.3390/cancers16051045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 02/25/2024] [Accepted: 02/28/2024] [Indexed: 03/14/2024] Open
Abstract
This study aims to review the status of the clinical use of monoclonal antibodies (mAbs) that have completed or are in ongoing clinical trials for targeted fluorescence-guided surgery (T-FGS) for the intraoperative identification of the tumor margins of extra-hematological solid tumors. For each of them, the targeted antigen, the mAb generic/commercial name and format, and clinical indications are presented, together with utility, doses, and the timing of administration. Based on the current scientific evidence in humans, the top three mAbs that could be prepared in a GMP-compliant bank ready to be delivered for surgical purposes are proposed to speed up the translation to the operating room and produce a few readily available "off-the-shelf" injectable fluorescent probes for safer and more effective solid tumor resection.
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Affiliation(s)
- Stefano Giuliani
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, London W1W 7TY, UK
- Cancer Section, Developmental Biology and Cancer Programme, UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, UK
- Department of Specialist Neonatal and Paediatric Surgery, Great Ormond Street Hospital for Children NHS Trust, London WC1N 3JH, UK
| | - Irene Paraboschi
- Department of Biomedical and Clinical Science, University of Milano, 20157 Milan, Italy
| | - Angus McNair
- National Institute for Health Research Bristol Biomedical Research Centre, Bristol Centre for Surgical Research, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol BS8 2PS, UK
- Department of Gastrointestinal Surgery, North Bristol NHS Trust, Bristol BS10 5NB, UK
| | - Myles Smith
- The Sarcoma, Melanoma and Rare Tumours Unit, The Royal Marsden Hospital, Institute Cancer of Research, London SW3 6JJ, UK
| | - Kenneth S Rankin
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
- North of England Bone and Soft Tissue Tumour Service, Royal Victoria Infirmary, Newcastle upon Tyne NE1 4LP, UK
| | - Daniel S Elson
- Hamlyn Centre for Robotic Surgery, Department of Surgery and Cancer, Imperial College London, London SW7 2AZ, UK
| | - Vinidh Paleri
- Head and Neck Unit, The Royal Marsden Hospitals, London SW3 6JJ, UK
| | - Daniel Leff
- Department of Surgery and Cancer, Imperial College London, London SW7 2AZ, UK
| | - Graeme Stasiuk
- Imaging Chemistry and Biology, School of Biomedical Engineering and Imaging Sciences, King's College London, St Thomas' Hospital, London SE1 7EH, UK
| | - John Anderson
- Cancer Section, Developmental Biology and Cancer Programme, UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, UK
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4
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Gow KW, Lautz TB, Malek MM, Cost NG, Newman EA, Dasgupta R, Christison-Lagay ER, Tiao GM, Davidoff AM. Children's Oncology Group's 2023 blueprint for research: Surgery. Pediatr Blood Cancer 2024; 71:e30766. [PMID: 37950538 PMCID: PMC10872730 DOI: 10.1002/pbc.30766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 10/30/2023] [Indexed: 11/12/2023]
Abstract
Surgery plays a crucial role in the treatment of children with solid malignancies. A well-conducted operation is often essential for cure. Collaboration with the primary care team is important for determining if and when surgery should be performed, and if performed, an operation must be done in accordance with well-established standards. The long-term consequences of surgery also need to be considered. Indications and objectives for a procedure vary. Providing education and developing and analyzing new research protocols that include aims relevant to surgery are key objectives of the Surgery Discipline of the Children's Oncology Group. The critical evaluation of emerging technologies to ensure safe, effective procedures is another key objective. Through research, education, and advancing technologies, the role of the pediatric surgeon in the multidisciplinary care of children with solid malignancies will continue to evolve.
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Affiliation(s)
- Kenneth W. Gow
- Division of General & Thoracic Surgery, Seattle Children’s Hospital, Seattle, Washington, USA
| | - Timothy B. Lautz
- Department of Pediatric Surgery, Lurie Children’s Hospital of Chicago, Northwestern University School of Medicine, Chicago, Illinois, USA
| | - Marcus M. Malek
- Division of Pediatric General and Thoracic Surgery, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Nicholas G. Cost
- Department of Surgery, Division of Urology and the Surgical Oncology Program, Children’s Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Erika A. Newman
- Department of Surgery, Mott Children’s Hospital, University of Michigan, Ann Arbor, Michigan, USA
| | - Roshni Dasgupta
- Division of Pediatric General and Thoracic Surgery, Cincinnati Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio, USA
| | - Emily R. Christison-Lagay
- Division of Pediatric Surgery, Yale School of Medicine, Yale-New Haven Children’s Hospital, New Haven, Connecticut, USA
| | - Gregory M. Tiao
- Division of Pediatric General and Thoracic Surgery, Cincinnati Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio, USA
| | - Andrew M. Davidoff
- Department of Surgery, St. Jude Children’s Research Hospital, Memphis, Tennessee, USA
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5
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Sever RE, Rosenblum LT, Reyes-Múgica M, Edwards WB, Malek MM, Kohanbash G. Survival following complete resection of neuroblastoma in novel orthotopic rat xenograft model. Sci Rep 2023; 13:20214. [PMID: 37980388 PMCID: PMC10657433 DOI: 10.1038/s41598-023-47537-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 11/14/2023] [Indexed: 11/20/2023] Open
Abstract
Neuroblastoma accounts for 15% of pediatric cancer deaths, despite multimodal therapy including surgical resection. Current neuroblastoma rodent models are insufficient for studying the impact of surgery and combination treatments, largely due to the small size of mouse models. Human neuroblastoma SK-N-BE(2) cells were injected into the left adrenal gland of 5-6-week-old RNU homozygous nude rats. Rats were either monitored by MRI until humane endpoint was reached or after 5 weeks underwent operative tumor resection, followed by monitoring for recurrence and survival. Following neuroblastoma cell implantation, the majority of tumors grew to greater than 5000 mm3 within 5.5-6.5 weeks, meeting the humane endpoint. Surgical resection was successfully done in 8 out of 9 rats, extending survival following tumor implantation from a median of 42 days to 78 days (p < 0.005). Pathology was consistent with human neuroblastoma, showing small round blue cell tumors with Homer-Wright rosettes, high mitoses and karyorrhectic index, and strong PHOX2B staining. Thus, we have established a novel orthotopic xenograft rat model of neuroblastoma and demonstrated increased survival of rats after surgical tumor resection. This model can be used for the development of surgical techniques, such as the use of intraoperative molecular imaging or assessment of combination therapies that include surgery.
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Affiliation(s)
- ReidAnn E Sever
- Department of Neurological Surgery, University of Pittsburgh, 530 45th Street, Pittsburgh, PA, 15201, USA
| | - Lauren Taylor Rosenblum
- Department of Surgery, University of Pittsburgh, 200 Lothrop Street, Pittsburgh, PA, 15213, USA
| | - Miguel Reyes-Múgica
- Department of Pathology, UPMC Children's Hospital of Pittsburgh, One Children's Hospital Drive, 4401 Penn Ave, Pittsburgh, PA, 15224, USA
| | - W Barry Edwards
- Department of Biochemistry, University of Missouri, 117 Schweitzer Hall, Columbia, MO, 65211, USA
| | - Marcus M Malek
- Department of Surgery, University of Pittsburgh, 200 Lothrop Street, Pittsburgh, PA, 15213, USA.
- Department of Pediatric General Surgery, University of Pittsburgh, One Children's Hospital Drive, 4401 Penn Ave, Pittsburgh, PA, 15224, USA.
| | - Gary Kohanbash
- Department of Neurological Surgery, University of Pittsburgh, 530 45th Street, Pittsburgh, PA, 15201, USA.
- Department of Immunology, University of Pittsburgh Medical Center, 200 Lothrop Street, Pittsburgh, PA, 15213, USA.
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6
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Pio L, Wijnen MHWA, Giuliani S, Sarnacki S, Davidoff AM, Abdelhafeez AH. Identification of Pediatric Tumors Intraoperatively Using Indocyanine Green (ICG). Ann Surg Oncol 2023; 30:7789-7798. [PMID: 37543553 DOI: 10.1245/s10434-023-13953-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 07/06/2023] [Indexed: 08/07/2023]
Abstract
BACKGROUND Fluorescence-guided surgery (FGS) with indocyanine green (ICG) is increasingly applied in pediatric surgical oncology. However, FGS has been mostly reported in case studies of liver or renal tumors. Applying novel technologies in pediatric surgical oncology is more challenging than in adult surgical oncology due to differences in tumor histology, biology, and fewer cases. No consensus exists on ICG-guided FGS for surgically managing pediatric solid tumors. Therefore, we reviewed the literature and discuss the limitations and prospects of FGS. METHODS Using PRISMA guidelines, we analyzed articles on ICG-guided FGS for childhood solid tumors. Case reports, opinion articles, and narrative reviews were excluded. RESULTS Of the 108 articles analyzed, 17 (14 retrospective and 3 prospective) met the inclusion criteria. Most (70.6%) studies used ICG to identify liver tumors, but the timing and dose of ICG administered varied. Intraoperative outcomes, sensitivity and specificity, were reported in 23.5% of studies. Fluorescence-guided liver resections resulted in negative margins in 90-100% of cases; lung metastasis was detected in 33% of the studies. In otolaryngologic malignancies, positive margins without fluorescence signal were reported in 25% of cases. Overall, ICG appeared effective and safe for lymph node sampling and nephron-sparing procedures. CONCLUSIONS Despite promising results from FGS, ICG use varies across the international pediatric surgical oncology community. Underreported intraoperative imaging outcomes and the diversity and rarity of childhood solid tumors hinder conclusive scientific evidence supporting adoption of ICG in pediatric surgical oncology. Further international collaborations are needed to study the applications and limitations of ICG in pediatric surgical oncology.
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Affiliation(s)
- Luca Pio
- Department of Surgery, MS133, St. Jude Children's Researsch Hospital, Memphis, TN, USA
- Learning Planet Institute, Université de Paris, Paris, France
| | - Marc H W A Wijnen
- Department of Surgery, Princess Maxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - Stefano Giuliani
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, London, UK
- Cancer Section, Developmental Biology and Cancer Programme, University College London Great Ormond Street Institute of Child Health, London, UK
- Department of Specialist Neonatal and Paediatric Surgery, Great Ormond Street Hospital for Children NHS Trust, London, UK
| | - Sabine Sarnacki
- Department of Pediatric Surgery, Urology and Transplantation, Necker-Enfants Malades Hospital, GH Centre, APHP, Paris, France
- Université de Paris Cité, Paris, France
| | - Andrew M Davidoff
- Department of Surgery, MS133, St. Jude Children's Researsch Hospital, Memphis, TN, USA
- Department of Surgery, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Abdelhafeez H Abdelhafeez
- Department of Surgery, MS133, St. Jude Children's Researsch Hospital, Memphis, TN, USA.
- Department of Surgery, University of Tennessee Health Science Center, Memphis, TN, USA.
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7
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Pio L, Wijnen MHWA, Giuliani S, Sarnacki S, Davidoff AM, Abdelhafeez AH. ASO Author Reflections: Identification of Pediatric Tumors Intraoperatively Using Indocyanine Green (ICG). Ann Surg Oncol 2023; 30:7799-7800. [PMID: 37573285 DOI: 10.1245/s10434-023-14116-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 07/26/2023] [Indexed: 08/14/2023]
Affiliation(s)
- Luca Pio
- Department of Surgery, MS 133, St. Jude Children's Research Hospital, Memphis, TN, USA
- Learning Planet Institute, Université de Paris, Paris, France
| | - Marc H W A Wijnen
- Princess Maxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - Stefano Giuliani
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, London, UK
- Cancer Section, Developmental Biology and Cancer Programme, UCL Great Ormond Street Institute of Child Health, London, UK
- Department of Specialist Neonatal and Paediatric Surgery, Great Ormond Street Hospital for Children NHS Trust, London, UK
| | - Sabine Sarnacki
- Department of Pediatric Surgery, Urology and Transplantation, Necker-Enfants Malades Hospital, GH Centre, APHP, Paris, France
- Université de Paris Cité, Paris, France
| | - Andrew M Davidoff
- Department of Surgery, MS 133, St. Jude Children's Research Hospital, Memphis, TN, USA
- Department of Surgery, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Abdelhafeez H Abdelhafeez
- Department of Surgery, MS 133, St. Jude Children's Research Hospital, Memphis, TN, USA.
- Department of Surgery, University of Tennessee Health Science Center, Memphis, TN, USA.
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8
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Seah D, Cheng Z, Vendrell M. Fluorescent Probes for Imaging in Humans: Where Are We Now? ACS NANO 2023; 17:19478-19490. [PMID: 37787658 PMCID: PMC10604082 DOI: 10.1021/acsnano.3c03564] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 09/26/2023] [Indexed: 10/04/2023]
Abstract
Optical imaging has become an indispensable technology in the clinic. The molecular design of cell-targeted and highly sensitive materials, the validation of specific disease biomarkers, and the rapid growth of clinically compatible instrumentation have altogether revolutionized the way we use optical imaging in clinical settings. One prime example is the application of cancer-targeted molecular imaging agents in both trials and routine clinical use to define the margins of tumors and to detect lesions that are "invisible" to the surgeons, leading to improved resection of malignant tissues without compromising viable structures. In this Perspective, we summarize some of the key research advances in chemistry, biology, and engineering that have accelerated the translation of optical imaging technologies for use in human patients. Finally, our paper comments on several research areas where further work will likely render the next generation of technologies for translational optical imaging.
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Affiliation(s)
- Deborah Seah
- School
of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University Singapore 637371, Singapore
- Centre
for Inflammation Research, The University
of Edinburgh, EH16 4UU Edinburgh, U.K.
| | - Zhiming Cheng
- Centre
for Inflammation Research, The University
of Edinburgh, EH16 4UU Edinburgh, U.K.
- IRR
Chemistry Hub, Institute for Regeneration and Repair, The University of Edinburgh, EH16 4UU Edinburgh, U.K.
| | - Marc Vendrell
- Centre
for Inflammation Research, The University
of Edinburgh, EH16 4UU Edinburgh, U.K.
- IRR
Chemistry Hub, Institute for Regeneration and Repair, The University of Edinburgh, EH16 4UU Edinburgh, U.K.
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9
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Waterhouse DJ, Privitera L, Anderson J, Stoyanov D, Giuliani S. Enhancing intraoperative tumor delineation with multispectral short-wave infrared fluorescence imaging and machine learning. JOURNAL OF BIOMEDICAL OPTICS 2023; 28:094804. [PMID: 36993142 PMCID: PMC10042297 DOI: 10.1117/1.jbo.28.9.094804] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 03/06/2023] [Indexed: 06/19/2023]
Abstract
SIGNIFICANCE Fluorescence-guided surgery (FGS) provides specific real-time visualization of tumors, but intensity-based measurement of fluorescence is prone to errors. Multispectral imaging (MSI) in the short-wave infrared (SWIR) has the potential to improve tumor delineation by enabling machine-learning classification of pixels based on their spectral characteristics. AIM Determine whether MSI can be applied to FGS and combined with machine learning to provide a robust method for tumor visualization. APPROACH A multispectral SWIR fluorescence imaging device capable of collecting data from six spectral filters was constructed and deployed on neuroblastoma (NB) subcutaneous xenografts ( n = 6 ) after the injection of a NB-specific NIR-I fluorescent probe (Dinutuximab-IRDye800). We constructed image cubes representing fluorescence collected from ∼ 850 to 1450 nm and compared the performance of seven learning-based methods for pixel-by-pixel classification, including linear discriminant analysis, k -nearest neighbor classification, and a neural network. RESULTS The spectra of tumor and non-tumor tissue were subtly different and conserved between individuals. In classification, a combine principal component analysis and k -nearest-neighbor approach with area under curve normalization performed best, achieving 97.5% per-pixel classification accuracy (97.1%, 93.5%, and 99.2% for tumor, non-tumor tissue and background, respectively). CONCLUSIONS The development of dozens of new imaging agents provides a timely opportunity for multispectral SWIR imaging to revolutionize next-generation FGS.
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Affiliation(s)
- Dale J. Waterhouse
- University College London, Wellcome, EPSRC Centre for Interventional and Surgical Sciences, London, United Kingdom
| | - Laura Privitera
- University College London, Wellcome, EPSRC Centre for Interventional and Surgical Sciences, London, United Kingdom
- UCL Great Ormond Street Institute of Child Health, Cancer Section, Developmental Biology and Cancer Programme, London, United Kingdom
| | - John Anderson
- UCL Great Ormond Street Institute of Child Health, Cancer Section, Developmental Biology and Cancer Programme, London, United Kingdom
| | - Danail Stoyanov
- University College London, Wellcome, EPSRC Centre for Interventional and Surgical Sciences, London, United Kingdom
| | - Stefano Giuliani
- University College London, Wellcome, EPSRC Centre for Interventional and Surgical Sciences, London, United Kingdom
- UCL Great Ormond Street Institute of Child Health, Cancer Section, Developmental Biology and Cancer Programme, London, United Kingdom
- Great Ormond Street Hospital for Children NHS Trust, Department of Specialist Neonatal and Paediatric Surgery, London, United Kingdom
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10
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Jeremiasse B, Rijs Z, Angoelal KR, Hiemcke-Jiwa LS, de Boed EA, Kuppen PJK, Sier CFM, van Driel PBAA, van de Sande MAJ, Wijnen MHWA, Rios AC, van der Steeg AFW. Evaluation of Potential Targets for Fluorescence-Guided Surgery in Pediatric Ewing Sarcoma: A Preclinical Proof-of-Concept Study. Cancers (Basel) 2023; 15:3896. [PMID: 37568714 PMCID: PMC10417270 DOI: 10.3390/cancers15153896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 07/28/2023] [Accepted: 07/28/2023] [Indexed: 08/13/2023] Open
Abstract
Fluorescence-guided surgery (FGS), based on fluorescent tracers binding to tumor-specific biomarkers, could assist surgeons to achieve complete tumor resections. This study evaluated potential biomarkers for FGS in pediatric Ewing sarcoma (ES). Immunohistochemistry (IHC) was performed to assess CD99, CXCR4, CD117, NPY-R-Y1, and IGF-1R expression in ES biopsies and resection specimens. LINGO-1 and GD2 evaluation did not work on the acquired tissue. Based on the immunoreactive scores, anti-CD99 and anti-CD117 were evaluated for binding specificity using flow cytometry and immunofluorescence microscopy. Anti-GD2, a tracer in the developmental phase, was also tested. These three tracers were topically applied to a freshly resected ES tumor and adjacent healthy tissue. IHC demonstrated moderate/strong CD99 and CD117 expression in ES tumor samples, while adjacent healthy tissue had limited expression. Flow cytometry and immunofluorescence microscopy confirmed high CD99 expression, along with low/moderate CD117 and low GD2 expression, in ES cell lines. Topical anti-CD99 and anti-GD2 application on ES tumor showed fluorescence, while anti-CD117 did not show fluorescence for this patient. In conclusion, CD99-targeting tracers hold promise for FGS of ES. CD117 and GD2 tracers could be potential alternatives. The next step towards development of ES-specific FGS tracers could be ex vivo topical application experiments on a large cohort of ES patients.
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Affiliation(s)
- Bernadette Jeremiasse
- Department of Surgery, Princess Maxima Center for Pediatric Oncology, 3584 CS Utrecht, The Netherlands; (B.J.); (K.R.A.); (M.A.J.v.d.S.); (M.H.W.A.W.); (A.F.W.v.d.S.)
| | - Zeger Rijs
- Department of Orthopedic Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Karieshma R. Angoelal
- Department of Surgery, Princess Maxima Center for Pediatric Oncology, 3584 CS Utrecht, The Netherlands; (B.J.); (K.R.A.); (M.A.J.v.d.S.); (M.H.W.A.W.); (A.F.W.v.d.S.)
| | - Laura S. Hiemcke-Jiwa
- Department of Pathology, Princess Maxima Center for Pediatric Oncology, 3584 CS Utrecht, The Netherlands; (L.S.H.-J.); (E.A.d.B.)
- Department of Pathology, University Medical Center Utrecht, 3584 CG Utrecht, The Netherlands
| | - Ella A. de Boed
- Department of Pathology, Princess Maxima Center for Pediatric Oncology, 3584 CS Utrecht, The Netherlands; (L.S.H.-J.); (E.A.d.B.)
| | - Peter J. K. Kuppen
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (P.J.K.K.); (C.F.M.S.)
| | - Cornelis F. M. Sier
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (P.J.K.K.); (C.F.M.S.)
| | | | - Michiel A. J. van de Sande
- Department of Surgery, Princess Maxima Center for Pediatric Oncology, 3584 CS Utrecht, The Netherlands; (B.J.); (K.R.A.); (M.A.J.v.d.S.); (M.H.W.A.W.); (A.F.W.v.d.S.)
- Department of Orthopedic Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Marc H. W. A. Wijnen
- Department of Surgery, Princess Maxima Center for Pediatric Oncology, 3584 CS Utrecht, The Netherlands; (B.J.); (K.R.A.); (M.A.J.v.d.S.); (M.H.W.A.W.); (A.F.W.v.d.S.)
| | - Anne C. Rios
- Research Department, Princess Maxima Center for Pediatric Oncology, 3584 CS Utrecht, The Netherlands;
- Oncode Institute, Jaarbeursplein 6, 3521 AL Utrecht, The Netherlands
| | - Alida F. W. van der Steeg
- Department of Surgery, Princess Maxima Center for Pediatric Oncology, 3584 CS Utrecht, The Netherlands; (B.J.); (K.R.A.); (M.A.J.v.d.S.); (M.H.W.A.W.); (A.F.W.v.d.S.)
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11
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Preziosi A, Paraboschi I, Giuliani S. Evaluating the Development Status of Fluorescence-Guided Surgery (FGS) in Pediatric Surgery Using the Idea, Development, Exploration, Assessment, and Long-Term Study (IDEAL) Framework. CHILDREN 2023; 10:children10040689. [PMID: 37189938 DOI: 10.3390/children10040689] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 03/30/2023] [Accepted: 04/03/2023] [Indexed: 04/08/2023]
Abstract
Fluorescence-guided surgery (FGS) is used in many pediatric subspecialties but there are currently no standard guidelines or outcome data. We aimed to assess the current status of FGS in pediatrics using the Idea, Development, Exploration, Assessment, and Long-term study (IDEAL) framework. Clinical papers on FGS in children published from January 2000 to December 2022 were systematically reviewed. The stage of research development was measured considering seven fields of application: biliary tree imaging, vascular perfusion for gastrointestinal procedures, lymphatic flow imaging, tumor resection, urogenital surgery, plastic surgery, and miscellaneous procedures. Fifty-nine articles were selected. For each field of application, the overall IDEAL stage was determined to be 2a for biliary tree imaging (10 publications, 102 cases), 1 for vascular perfusion for gastrointestinal procedures (8 publications, 28 cases), 1 for lymphatic flow imaging (12 publications, 33 cases), 2a for tumor resection (20 publications, 238 cases), 2a for urogenital surgery (9 publications, 197 cases), and 1-2a for plastic surgery (4 publications, 26 cases). One report did not belong to any categories. FGS in children is still in an early phase of adoption and development. We recommend using the IDEAL framework as a guide and suggest developing multicenter studies to define the standard guidelines, effectiveness, and outcomes.
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Affiliation(s)
- Alessandra Preziosi
- Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico di Milano, 20122 Milano, Italy
- Cancer Section, Developmental Biology and Cancer Programme, UCL, Great Ormond Street Institute of Child Health, London WC1N 1EH, UK
| | - Irene Paraboschi
- Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico di Milano, 20122 Milano, Italy
- Cancer Section, Developmental Biology and Cancer Programme, UCL, Great Ormond Street Institute of Child Health, London WC1N 1EH, UK
| | - Stefano Giuliani
- Cancer Section, Developmental Biology and Cancer Programme, UCL, Great Ormond Street Institute of Child Health, London WC1N 1EH, UK
- Department of Specialist Neonatal and Paediatric Surgery, Great Ormond Street Hospital NHS Foundation Trust, London WC1N 3JH, UK
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences (WEISS), University College London, London W1W 7TY, UK
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12
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Rijs Z, Belt E, Kalisvaart GM, Sier CFM, Kuppen PJK, Cleven AHG, Vahrmeijer AL, van de Sande MAJ, van Driel PBAA. Immunohistochemical Evaluation of Candidate Biomarkers for Fluorescence-Guided Surgery of Myxofibrosarcoma Using an Objective Scoring Method. Biomedicines 2023; 11:biomedicines11030982. [PMID: 36979961 PMCID: PMC10046284 DOI: 10.3390/biomedicines11030982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/22/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023] Open
Abstract
INTRODUCTION Myxofibrosarcoma (MFS) is the most common soft-tissue sarcoma subtype in elderly patients. Local recurrence (LR) remains a major concern as the lack of intraoperative guidance and an infiltrative growth pattern with long, slender tails hamper surgeons' ability to achieve adequate resection margins for MFS. Fluorescence-guided surgery (FGS) could overcome this concern by delineating tumor tissue during surgery. One of the most important steps to successful FGS is to define a tumor-specific biomarker that is highly overexpressed in tumor tissue while low or absent in adjacent healthy tissue. The aim of this study is to evaluate the expression of eight previously selected promising biomarkers for FGS in MFS tissue samples with adjacent healthy tissue using immunohistochemistry (IHC). METHODS The following eight biomarkers were stained in seventeen paraffin-embedded MFS samples: tumor endothelial marker-1 (TEM-1, also known as endosialin/CD248), vascular endothelial growth factor receptor-1 (VEGFR-1, also known as Flt-1), vascular endothelial growth factor receptor-2 (VEGFR-2, also known as Flk1), vascular endothelial growth factor-A (VEGF-A), epidermal growth factor receptor (EGFR), insulin-like growth factor-1 receptor (IGF-1R), platelet derived growth factor receptor-α (PDGFR-α), and cluster of differentiation 40 (CD40, also known as TNFRSF5). A pathologist specializing in sarcoma annotated the margin between the tumor and adjacent healthy tissue in each MFS tissue sample. Subsequently, we used an objective IHC scoring method to assess and compare the difference in staining intensity between the tumor and adjacent healthy tissue, which is crucial for the use of FGS. RESULTS TEM-1, VEGF-A, and PDGFR-α stained all MFS tumors, while the other biomarkers did not show expression in all MFS tumors. Ultimately, TEM-1 was identified as the most suitable biomarker for FGS in MFS based on higher tumor-to-background (TBR) staining intensity compared to VEGF-A and PDGFR-α, regardless of preoperative therapy. CONCLUSION TEM-1-targeted FGS tracers should be further investigated to optimize MFS treatment.
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Affiliation(s)
- Zeger Rijs
- Department of Orthopedic Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Esther Belt
- Department of Orthopedic Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Gijsbert M Kalisvaart
- Department of Radiology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Cornelis F M Sier
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
- Percuros BV, Zernikedreef 8, 2333 CL Leiden, The Netherlands
| | - Peter J K Kuppen
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Arjen H G Cleven
- Department of Pathology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
- Department of Pathology, University Medical Center Groningen, 9700 RB Groningen, The Netherlands
| | - Alexander L Vahrmeijer
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Michiel A J van de Sande
- Department of Orthopedic Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
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13
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Niessen VJA, Wenker STM, Lam MGEH, van Noesel MM, Poot AJ. Biologicals as theranostic vehicles in paediatric oncology. Nucl Med Biol 2022; 114-115:58-64. [PMID: 36126433 DOI: 10.1016/j.nucmedbio.2022.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 09/05/2022] [Accepted: 09/08/2022] [Indexed: 12/27/2022]
Abstract
Biologicals, such as antibodies or antibody-fragments e.g. nanobodies, have changed the landscape of cancer therapy and can be used in combination with traditional cancer treatments. They have been demonstrated to be excellent vehicles for molecular imaging. Several biologicals for nuclear imaging of adult cancer may be used in combination with (nuclear) therapy. Though it's great potential, molecular imaging using biologicals is rarely applied in paediatric oncology. This paper describes the current status of biologicals as radiopharmaceuticals for childhood cancer. Furthermore, the importance and potential for developing additional biological theranostics as opportunity to image and treat childhood cancer is discussed.
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Affiliation(s)
- Veerle J A Niessen
- Princess Máxima Center for Paediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, the Netherlands; Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, the Netherlands.
| | - Sylvia T M Wenker
- Princess Máxima Center for Paediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, the Netherlands; Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, the Netherlands.
| | - Marnix G E H Lam
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, the Netherlands.
| | - Max M van Noesel
- Princess Máxima Center for Paediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, the Netherlands.
| | - Alex J Poot
- Princess Máxima Center for Paediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, the Netherlands; Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, the Netherlands.
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14
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Neuroblastoma: Essential genetic pathways and current therapeutic options. Eur J Pharmacol 2022; 926:175030. [DOI: 10.1016/j.ejphar.2022.175030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 05/09/2022] [Accepted: 05/10/2022] [Indexed: 12/29/2022]
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15
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Paraboschi I, Privitera L, Kramer-Marek G, Anderson J, Giuliani S. Novel Treatments and Technologies Applied to the Cure of Neuroblastoma. CHILDREN (BASEL, SWITZERLAND) 2021; 8:482. [PMID: 34200194 PMCID: PMC8226870 DOI: 10.3390/children8060482] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 12/31/2022]
Abstract
Neuroblastoma (NB) is the most common extracranial solid tumour in childhood, accounting for approximately 15% of all cancer-related deaths in the paediatric population1. It is characterised by heterogeneous clinical behaviour in neonates and often adverse outcomes in toddlers. The overall survival of children with high-risk disease is around 40-50% despite the aggressive treatment protocols consisting of intensive chemotherapy, surgery, radiation therapy and hematopoietic stem cell transplantation2,3. There is an ongoing research effort to increase NB's cellular and molecular biology knowledge to translate essential findings into novel treatment strategies. This review aims to address new therapeutic modalities emerging from preclinical studies offering a unique translational opportunity for NB treatment.
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Affiliation(s)
- Irene Paraboschi
- Wellcome/EPSRC Centre for Interventional & Surgical Sciences, University College London, London WC1E 6BT, UK; (I.P.); (L.P.)
- Preclinical Molecular Imaging, Division of Radiotherapy and Imaging, The Institute of Cancer Research, London SM2 5NG, UK;
- Cancer Section, Developmental Biology and Cancer Programme, UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, UK;
| | - Laura Privitera
- Wellcome/EPSRC Centre for Interventional & Surgical Sciences, University College London, London WC1E 6BT, UK; (I.P.); (L.P.)
- Cancer Section, Developmental Biology and Cancer Programme, UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, UK;
| | - Gabriela Kramer-Marek
- Preclinical Molecular Imaging, Division of Radiotherapy and Imaging, The Institute of Cancer Research, London SM2 5NG, UK;
| | - John Anderson
- Cancer Section, Developmental Biology and Cancer Programme, UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, UK;
| | - Stefano Giuliani
- Wellcome/EPSRC Centre for Interventional & Surgical Sciences, University College London, London WC1E 6BT, UK; (I.P.); (L.P.)
- Department of Specialist Neonatal and Pediatric Surgery, Great Ormond Street Hospital for Children NHS Foundation Trust, London WC1N 3JH, UK
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16
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Houvast RD, Vankemmelbeke M, Durrant LG, Wuhrer M, Baart VM, Kuppen PJK, de Geus-Oei LF, Vahrmeijer AL, Sier CFM. Targeting Glycans and Heavily Glycosylated Proteins for Tumor Imaging. Cancers (Basel) 2020; 12:cancers12123870. [PMID: 33371487 PMCID: PMC7767531 DOI: 10.3390/cancers12123870] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 02/07/2023] Open
Abstract
Simple Summary Distinguishing malignancy from healthy tissue is essential for oncologic surgery. Targeted imaging during an operation aids the surgeon to operate better. The present tracers for detecting cancer are directed against proteins that are overexpressed on the membrane of tumor cells. This review evaluates the use of tumor-associated sugar molecules as an alternative for proteins to image cancer tissue. These sugar molecules are present as glycans on glycosylated membrane proteins and glycolipids. Due to their location and large numbers per cell, these sugar molecules might be better targets for tumor imaging than proteins. Abstract Real-time tumor imaging techniques are increasingly used in oncological surgery, but still need to be supplemented with novel targeted tracers, providing specific tumor tissue detection based on intra-tumoral processes or protein expression. To maximize tumor/non-tumor contrast, targets should be highly and homogenously expressed on tumor tissue only, preferably from the earliest developmental stage onward. Unfortunately, most evaluated tumor-associated proteins appear not to meet all of these criteria. Thus, the quest for ideal targets continues. Aberrant glycosylation of proteins and lipids is a fundamental hallmark of almost all cancer types and contributes to tumor progression. Additionally, overexpression of glycoproteins that carry aberrant glycans, such as mucins and proteoglycans, is observed. Selected tumor-associated glyco-antigens are abundantly expressed and could, thus, be ideal candidates for targeted tumor imaging. Nevertheless, glycan-based tumor imaging is still in its infancy. In this review, we highlight the potential of glycans, and heavily glycosylated proteoglycans and mucins as targets for multimodal tumor imaging by discussing the preclinical and clinical accomplishments within this field. Additionally, we describe the major advantages and limitations of targeting glycans compared to cancer-associated proteins. Lastly, by providing a brief overview of the most attractive tumor-associated glycans and glycosylated proteins in association with their respective tumor types, we set out the way for implementing glycan-based imaging in a clinical practice.
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Affiliation(s)
- Ruben D. Houvast
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (R.D.H.); (V.M.B.); (P.J.K.K.); (A.L.V.)
| | - Mireille Vankemmelbeke
- Scancell Limited, University of Nottingham Biodiscovery Institute, University Park, Nottingham NG7 2RD, UK; (M.V.); (L.G.D.)
| | - Lindy G. Durrant
- Scancell Limited, University of Nottingham Biodiscovery Institute, University Park, Nottingham NG7 2RD, UK; (M.V.); (L.G.D.)
- Division of Cancer and Stem Cells, School of Medicine, University of Nottingham Biodiscovery Institute, University Park, Nottingham NG7 2RD, UK
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands;
| | - Victor M. Baart
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (R.D.H.); (V.M.B.); (P.J.K.K.); (A.L.V.)
| | - Peter J. K. Kuppen
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (R.D.H.); (V.M.B.); (P.J.K.K.); (A.L.V.)
| | - Lioe-Fee de Geus-Oei
- Department of Radiology, Section of Nuclear Medicine, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands;
- Biomedical Photonic Imaging Group, University of Twente, 7500 AE Enschede, The Netherlands
| | - Alexander L. Vahrmeijer
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (R.D.H.); (V.M.B.); (P.J.K.K.); (A.L.V.)
| | - Cornelis F. M. Sier
- Department of Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (R.D.H.); (V.M.B.); (P.J.K.K.); (A.L.V.)
- Percuros BV, 2333 ZA Leiden, The Netherlands
- Correspondence: ; Tel.: +31-752662610
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