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Fossum M, Kaefer M, Bagli D, Harper L, Herbst KW, Nelson CP, Braga LH, Nieuwhof-Leppink A, Kalfa N, Garriboli M, Cascio S. The importance of animal specificity in animal experimentation, part I: Anatomy in relation to pediatric urology. J Pediatr Urol 2024; 20:312-314. [PMID: 38199905 DOI: 10.1016/j.jpurol.2023.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Accepted: 12/11/2023] [Indexed: 01/12/2024]
Abstract
Why and when is animal experimentation relevant? The answer to this question depends on the research question. In this short educational article we aim to raise awareness of the importance of formulating a very specific research question before choosing an animal species. An awareness of anatomical and physiological differences vis-a-vis similarities between species, will increase the potential for obtaining data that is relevant for translation to human conditions.
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Affiliation(s)
- Magdalena Fossum
- Department of Pediatric Surgery, Center of Cancer and Organ Diseases, Rigshospitalet, Copenhagen University, Copenhagen, Denmark; Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.
| | - Martin Kaefer
- Riley Hospital for Children, Indiana University, Indianapolis, IN, United States
| | - Darius Bagli
- Division of Urology, Departments of Surgery and Physiology, University of Toronto, Developmental and Stem Cell Biology, The Hospital for Sick Children and Research Institute, Toronto, Ontario, Canada
| | - Luke Harper
- Service de Chirurgie Pédiatrique, Hôpital Pellegrin-Enfants, CHU de Bordeaux, France
| | - Katherine W Herbst
- Division of Urology, Research Institute, Connecticut Children's Medical Center, Hartford, CT, United States
| | - Caleb P Nelson
- Department of Urology, Boston Children's Hospital and Harvard Medical School, MA, United States
| | - Luis H Braga
- Department of Surgery, Division of Urology, McMaster University, McMaster Children's Hospital, 1200 Main Street West, Hamilton, Ontario L8N 3Z5, Canada
| | - Anka Nieuwhof-Leppink
- Department Urotherapy, Wilhelmina Children's Hospital, Part of University Medical Center Utrecht, Netherlands
| | - Nicolas Kalfa
- Department of Pediatric Surgery and Urology, Lapeyronie Hospital, CHU Montpellier, France; UMR1302 Institute Desbrest of Epidemiology and Public Health, INSERM, University Montpellier, Montpellier, France
| | - Massimo Garriboli
- Department of Paediatric Urology, Evelina London Children's Hospital, Westminster Bridge Road, London, SE1 7EH, United Kingdom
| | - Salvatore Cascio
- Department of Pediatric Surgery, School of Medicine, University College Dublin and Children's Health Ireland at Temple Street, Dublin, Ireland
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Gudde AN, van Velthoven MJJ, Kouwer PHJ, Roovers JPWR, Guler Z. Injectable polyisocyanide hydrogel as healing supplement for connective tissue regeneration in an abdominal wound model. Biomaterials 2023; 302:122337. [PMID: 37793268 DOI: 10.1016/j.biomaterials.2023.122337] [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: 06/28/2023] [Revised: 09/07/2023] [Accepted: 09/23/2023] [Indexed: 10/06/2023]
Abstract
In pelvic organ prolapse (POP) patients, the uterus, bladder and/or rectum descends into vagina due to weakened support tissues. High recurrence rates after POP surgery suggest an urgent need for improved surgical outcomes. Our aim is to promote connective tissue healing that results in stimulated tissue support functions by surgically applying a hydrogel functionalized with biological cues. We used known vaginal wound healing promoting factors (basic fibroblast growth factor, β-estradiol, adipose-derived stem cells) in the biomimetic and injectable polyisocyanide (PIC) hydrogel, which in itself induces regenerative vaginal fibroblast behavior. The regenerative capacity of injected PIC hydrogel, and the additional pro-regenerative effects of these bioactive factors was evaluated in abdominal wounds in rabbits. Assessment of connective tissue healing (tensile testing, histology, immunohistochemistry) revealed that injection with all PIC formulations resulted in a statistically significant stiffness and collagen increase over time, in contrast to sham. Histological evaluation indicated new tissue growth with moderate to mild immune activity at the hydrogel - tissue interface. The results suggest that PIC injection in an abdominal wound improves healing towards regaining load-bearing capacity, which encourages us to investigate application of the hydrogel in a more translational vaginal model for POP surgery in sheep.
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Affiliation(s)
- Aksel N Gudde
- Department of Obstetrics and Gynecology, Amsterdam University Medical Center-location AMC, Meibergdreef 9, 1105 AZ, Amsterdam, the Netherlands; Amsterdam Reproduction and Development, Amsterdam University Medical Center-location AMC, Meibergdreef 9, 1105 AZ, Amsterdam, the Netherlands
| | - Melissa J J van Velthoven
- Department of Urology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Geert Grooteplein Zuid 28, 6525 GA, Nijmegen, the Netherlands; Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, the Netherlands
| | - Paul H J Kouwer
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, the Netherlands
| | - Jan-Paul W R Roovers
- Department of Obstetrics and Gynecology, Amsterdam University Medical Center-location AMC, Meibergdreef 9, 1105 AZ, Amsterdam, the Netherlands; Amsterdam Reproduction and Development, Amsterdam University Medical Center-location AMC, Meibergdreef 9, 1105 AZ, Amsterdam, the Netherlands
| | - Zeliha Guler
- Department of Obstetrics and Gynecology, Amsterdam University Medical Center-location AMC, Meibergdreef 9, 1105 AZ, Amsterdam, the Netherlands; Amsterdam Reproduction and Development, Amsterdam University Medical Center-location AMC, Meibergdreef 9, 1105 AZ, Amsterdam, the Netherlands.
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