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Isaac AH, Recalde Phillips SY, Ruben E, Estes M, Rajavel V, Baig T, Paleti C, Landsgaard K, Lee RH, Guda T, Criscitiello MF, Gregory C, Alge DL. Impact of PEG sensitization on the efficacy of PEG hydrogel-mediated tissue engineering. Nat Commun 2024; 15:3283. [PMID: 38637507 PMCID: PMC11026400 DOI: 10.1038/s41467-024-46327-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 02/22/2024] [Indexed: 04/20/2024] Open
Abstract
While poly(ethylene glycol) (PEG) hydrogels are generally regarded as biologically inert blank slates, concerns over PEG immunogenicity are growing, and the implications for tissue engineering are unknown. Here, we investigate these implications by immunizing mice against PEG to stimulate anti-PEG antibody production and evaluating bone defect regeneration after treatment with bone morphogenetic protein-2-loaded PEG hydrogels. Quantitative analysis reveals that PEG sensitization increases bone formation compared to naive controls, whereas histological analysis shows that PEG sensitization induces an abnormally porous bone morphology at the defect site, particularly in males. Furthermore, immune cell recruitment is higher in PEG-sensitized mice administered the PEG-based treatment than their naive counterparts. Interestingly, naive controls that were administered a PEG-based treatment also develop anti-PEG antibodies. Sex differences in bone formation and immune cell recruitment are also apparent. Overall, these findings indicate that anti-PEG immune responses can impact tissue engineering efficacy and highlight the need for further investigation.
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Affiliation(s)
- Alisa H Isaac
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, San Antonio, TX, USA
- Department of Cell Systems and Anatomy, The University of Texas Health San Antonio, San Antonio, TX, USA
| | | | - Elizabeth Ruben
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Matthew Estes
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Varsha Rajavel
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Talia Baig
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Carol Paleti
- Department of Cell Biology and Genetics, School of Medicine, Texas A&M University, College Station, TX, USA
| | - Kirsten Landsgaard
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Ryang Hwa Lee
- Department of Cell Biology and Genetics, School of Medicine, Texas A&M University, College Station, TX, USA
| | - Teja Guda
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, San Antonio, TX, USA
- Department of Cell Systems and Anatomy, The University of Texas Health San Antonio, San Antonio, TX, USA
| | - Michael F Criscitiello
- Comparative Immunogenetics Laboratory, Department of Veterinary Pathobiology, Texas A&M University, College Station, TX, USA
| | - Carl Gregory
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
- Department of Cell Biology and Genetics, School of Medicine, Texas A&M University, College Station, TX, USA
| | - Daniel L Alge
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA.
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX, USA.
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Hensel ME, Landsgaard K, Wang W, Neupane S, Su C, Blue-McClendon A, Porter BF, Uzal FA, Rech R. Toxoplasmosis in ring-tailed lemurs (Lemur catta) and a peahen (Pavo cristatus) in a zoological collection caused by the common toxoplasma genotype in wild animals in the US. Vet Parasitol Reg Stud Reports 2023; 41:100876. [PMID: 37208075 DOI: 10.1016/j.vprsr.2023.100876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 04/06/2023] [Accepted: 04/14/2023] [Indexed: 05/21/2023]
Abstract
Toxoplasmosis is caused by the ubiquitous Apicomplexan protozoan Toxoplasma gondii. This pathogen affects domestic and wildlife species, but prosimians including ring-tailed lemurs (Lemur catta) are highly susceptible to infection with high mortality rates. Avian species are considered resistant to infection and are often used in surveillance efforts to determine genotypes of T. gondii present in geographical areas. This study describes the gross and histologic lesions of an outbreak of toxoplasmosis in a university-run zoological collection involving three ring-tailed lemurs and a peahen (Pavo cristatus). DNA was extracted from the liver of the lemurs and peahen to determine the genotype of T. gondii by polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP), which revealed that all samples were ToxoDB PCR-RFLP genotype #5 (haplogroup 12) that is common in wildlife in North America.
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Affiliation(s)
- M E Hensel
- Department of Veterinary Pathobiology, School of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX 77845, United States of America; Department of Comparative Medicine, Michale E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX 78602, United States of America
| | - K Landsgaard
- Department of Veterinary Pathobiology, School of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX 77845, United States of America
| | - W Wang
- Department of Microbiology, University of Tennessee, Knoxville, TN 37996-0845, United States of America
| | - S Neupane
- Department of Veterinary Pathobiology, School of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX 77845, United States of America
| | - C Su
- Department of Microbiology, University of Tennessee, Knoxville, TN 37996-0845, United States of America
| | - A Blue-McClendon
- Department of Veterinary Physiology & Pharmacology, Texas A&M University, College Station, TX 77843, United States of America
| | - B F Porter
- Department of Veterinary Pathobiology, School of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX 77845, United States of America
| | - F A Uzal
- California Animal Health and Food Safety, University of California-Davis, San Bernardino, CA 92408, United States of America
| | - R Rech
- Department of Veterinary Pathobiology, School of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX 77845, United States of America.
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Landsgaard K, St. Jean S, Lovell S, Levine J, Gremillion C, Summers B, Rech RR. Case report: Hemangioblastoma in the brainstem of a dog. Front Vet Sci 2023; 10:1126477. [PMID: 37035811 PMCID: PMC10073555 DOI: 10.3389/fvets.2023.1126477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 02/14/2023] [Indexed: 04/11/2023] Open
Abstract
A 3-year-old castrated male, American Pit Bull Terrier presented to Texas A&M University due to a 3-week mixed cerebellar and general proprioceptive ataxia, circling, head tilt, and dull mentation. Neurologic examination revealed signs of vestibular and mesencephalic dysfunction. Postmortem examination revealed a 1.1 × 1 × 0.8-cm, soft, dark red, well-circumscribed, left-sided mass, extending from the crus cerebri of the midbrain caudally to the pons. Microscopically, the neoplasm was composed of a spindle-shaped interstitial population of cells interspersed between a prominent capillary network, consistent with the reticular pattern of hemangioblastoma. Interstitial cells had strong, diffuse, intracytoplasmic immunolabeling for neuron-specific enolase (NSE) and were variably positive for intracytoplasmic glial fibrillary acidic protein (GFAP). Vascular endothelial cells had strong diffuse, intracytoplasmic immunolabeling for von Willebrand factor (VWF) glycoprotein. To date, only six cases of hemangioblastoma have been reported in canines, five in the spinal cord, and one in the rostral cerebrum. Our case may represent the first canine hemangioblastoma localized to the brainstem.
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Affiliation(s)
- Kirsten Landsgaard
- Department of Veterinary Pathobiology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, United States
| | - Samantha St. Jean
- Department of Veterinary Pathobiology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, United States
| | - Stephanie Lovell
- Department of Small Animal Clinical Sciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, United States
| | - Jonathan Levine
- Department of Small Animal Clinical Sciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, United States
| | - Christine Gremillion
- Department of Large Animal Clinical Sciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, United States
| | - Brian Summers
- School of Veterinary Medicine, University of Melbourne, Werribee, VIC, Australia
| | - Raquel R. Rech
- Department of Veterinary Pathobiology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, United States
- *Correspondence: Raquel R. Rech
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Wesselowski S, Janacek B, Landsgaard K, Aceino A, Porter BF. Pancarditis as the sole clinical manifestation of protothecosis in a Boxer dog. J Vet Cardiol 2022; 41:128-133. [DOI: 10.1016/j.jvc.2022.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 02/16/2022] [Accepted: 02/21/2022] [Indexed: 10/19/2022]
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Albuquerque C, Pagnossin D, Landsgaard K, Simpson J, Brown D, Irvine J, Candlish D, Ridyard AE, Douce G, Millins C. The duration of antibiotic treatment is associated with carriage of toxigenic and non-toxigenic strains of Clostridioides difficile in dogs. PLoS One 2021; 16:e0245949. [PMID: 33979349 PMCID: PMC8115768 DOI: 10.1371/journal.pone.0245949] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 04/29/2021] [Indexed: 02/04/2023] Open
Abstract
Clostridioides difficile is a leading cause of human antibiotic-associated diarrhoeal disease globally. Zoonotic reservoirs of infection are increasingly suspected to play a role in the emergence of this disease in the community and dogs are considered as one potential source. Here we use a canine case-control study at a referral veterinary hospital in Scotland to assess: i) the risk factors associated with carriage of C. difficile by dogs, ii) whether carriage of C. difficile is associated with clinical disease in dogs and iii) the similarity of strains isolated from dogs with local human clinical surveillance. The overall prevalence of C. difficile carriage in dogs was 18.7% (95% CI 14.8–23.2%, n = 61/327) of which 34% (n = 21/61) were toxigenic strains. We found risk factors related to prior antibiotic treatment were significantly associated with C. difficile carriage by dogs. However, the presence of toxigenic strains of C. difficile in a canine faecal sample was not associated with diarrhoeal disease in dogs. Active toxin was infrequently detected in canine faecal samples carrying toxigenic strains (2/11 samples). Both dogs in which active toxin was detected had no clinical evidence of gastrointestinal disease. Among the ten toxigenic ribotypes of C. difficile detected in dogs in this study, six of these (012, 014, 020, 026, 078, 106) were ribotypes commonly associated with human clinical disease in Scotland, while nontoxigenic isolates largely belonged to 010 and 039 ribotypes. Whilst C. difficile does not appear commonly associated with diarrhoeal disease in dogs, antibiotic treatment increases carriage of this bacteria including toxigenic strains commonly found in human clinical disease.
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Affiliation(s)
- Carolina Albuquerque
- Small Animal Hospital, School of Veterinary Medicine, University of Glasgow, Glasgow, United Kingdom
| | - Davide Pagnossin
- Veterinary Pathology, Public Health and Disease Investigation, School of Veterinary Medicine, University of Glasgow, Glasgow, United Kingdom
- Institute of Infection, Immunity and Inflammation, Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Kirsten Landsgaard
- Veterinary Pathology, Public Health and Disease Investigation, School of Veterinary Medicine, University of Glasgow, Glasgow, United Kingdom
| | - Jessica Simpson
- Institute of Infection, Immunity and Inflammation, Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Derek Brown
- Scottish Microbiology Reference Laboratories, Glasgow, United Kingdom
| | - June Irvine
- Institute of Infection, Immunity and Inflammation, Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Denise Candlish
- Institute of Infection, Immunity and Inflammation, Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Alison E. Ridyard
- Small Animal Hospital, School of Veterinary Medicine, University of Glasgow, Glasgow, United Kingdom
| | - Gillian Douce
- Institute of Infection, Immunity and Inflammation, Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
- * E-mail: (CM); (GD)
| | - Caroline Millins
- Veterinary Pathology, Public Health and Disease Investigation, School of Veterinary Medicine, University of Glasgow, Glasgow, United Kingdom
- Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, United Kingdom
- * E-mail: (CM); (GD)
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