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Kment J, Newsted D, Young S, Vermeulen MC, Laight BJ, Greer PA, Lan Y, Craig AW. Blockade of TGF-β and PD-L1 by bintrafusp alfa promotes survival in preclinical ovarian cancer models by promoting T effector and NK cell responses. Br J Cancer 2024:10.1038/s41416-024-02677-9. [PMID: 38622286 DOI: 10.1038/s41416-024-02677-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 03/27/2024] [Accepted: 04/02/2024] [Indexed: 04/17/2024] Open
Abstract
BACKGROUND Failure of immunotherapy in high-grade serous ovarian cancer (HGSC) may be due to high levels of transforming growth factor-β (TGF-β) in ascites or tumour immune microenvironment (TIME). Here, we test whether coordinated blockade of TGF-β and PD-L1 with bintrafusp alfa (BA) can provoke anti-tumour immune responses in preclinical HGSC models. METHODS BA is a first-in-class bifunctional inhibitor of TGF-β and PD-L1, and was tested for effects on overall survival and altered TIME in syngeneic HGSC models. RESULTS Using a mouse ID8-derived HGSC syngeneic model with IFNγ-inducible PD-L1 expression, BA treatments significantly reduced ascites development and tumour burden. BA treatments depleted TGF-β and VEGF in ascites, and skewed the TIME towards cytotoxicity compared to control. In the BR5 HGSC syngeneic model, BA treatments increased tumour-infiltrating CD8 T cells with effector memory and cytotoxic markers, as well as cytolytic NK cells. Extended BA treatments in the BR5 model produced ∼50% BA-cured mice that were protected from re-challenge. These BA-cured mice had increased peritoneal T-effector memory and NK cells compared to controls. CONCLUSIONS Our preclinical studies of BA in advanced ovarian cancer models support further testing of BA as an improved immunotherapy option for patients with advanced ovarian cancer.
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Affiliation(s)
- Jacob Kment
- Cancer Biology & Genetics division, Queen's Cancer Research Institute, Kingston, ON, Canada
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Daniel Newsted
- Cancer Biology & Genetics division, Queen's Cancer Research Institute, Kingston, ON, Canada
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Stephanie Young
- Cancer Biology & Genetics division, Queen's Cancer Research Institute, Kingston, ON, Canada
| | - Michael C Vermeulen
- Cancer Biology & Genetics division, Queen's Cancer Research Institute, Kingston, ON, Canada
| | - Brian J Laight
- Cancer Biology & Genetics division, Queen's Cancer Research Institute, Kingston, ON, Canada
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, ON, Canada
| | - Peter A Greer
- Cancer Biology & Genetics division, Queen's Cancer Research Institute, Kingston, ON, Canada
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, ON, Canada
| | - Yan Lan
- EMD Serono Research & Development Institute, Inc., Billerica, MA, USA
| | - Andrew W Craig
- Cancer Biology & Genetics division, Queen's Cancer Research Institute, Kingston, ON, Canada.
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada.
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Vermeulen MC, Pearse R, Young-Pearse T, Mostafavi S. Mosaic loss of Chromosome Y in aged human microglia. Genome Res 2022; 32:1795-1807. [PMID: 36041859 DOI: 10.1101/gr.276409.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 08/19/2022] [Indexed: 11/24/2022]
Abstract
Mosaic loss of Chromosome Y (LOY) is a common acquired structural mutation in the leukocytes of aging men that is correlated with several age-related diseases including Alzheimer's disease (AD). The molecular basis of LOY in brain cells has not been systematically investigated. Here, we present a large-scale analysis of single-cell and single-nuclei RNA brain datasets, yielding 851,674 cells, to investigate the cell type-specific burden of LOY. LOY frequencies differed widely between donors and CNS cell types. Among five well-represented neural cell types, LOY was enriched in microglia and rare in neurons, astrocytes, and oligodendrocytes. In microglia, LOY was significantly enriched in AD subjects. Differential gene expression (DE) analysis in microglia found 172 autosomal genes, 3 X-linked genes, and 10 pseudoautosomal genes associated with LOY. To our knowledge, we provide the first evidence of LOY in the microglia, and highlight its potential roles in aging and the pathogenesis of neurodegenerative disorders such as AD.
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van Egmond PW, Vermeulen MC, van Dijke CF, Graat HCA. Superior dislocation of the patella: a pathognomonic finding and review of literature. Skeletal Radiol 2017; 46:259-264. [PMID: 27915446 DOI: 10.1007/s00256-016-2540-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 08/13/2016] [Accepted: 08/21/2016] [Indexed: 02/02/2023]
Abstract
A 59-year-old woman with a painful right knee that became locked in extension after a trivial trauma was seen at the emergency room. This was caused by unloaded hyperextension in bed. She was diagnosed with a superior dislocation of the patella. A closed reduction was performed, but a recurrent episode was seen within a week. An arthroscopy was performed, in which the causative osteophytes were removed. In the 12-month follow-up after treatment, no recurrence was seen. A superior dislocation of the patella is caused by patellofemoral osteophytes that interlock. This can cause a degenerative knee to become locked in extension. Beside interlocking osteophytes of the patella and the distal femur, the superior part of the patella is tilted away from the femur. This is caused by the pull of the patella tendon and the simultaneous relaxation of the quadriceps tendon. This is a pathognomonic finding on radiographs that, to the best of our knowledge, has been identified but not been appreciated as such in previous reports. As illustrated in this report, a superior dislocation of the patella can easily be recognized on physical examination and radiographic imaging alone when familiar with the specific abnormalities. This will reduce unnecessary diagnostic imaging studies and delay in treatment. This case report illustrates a recurrent case of superior dislocation of the patella. We summarize and evaluate previous reports, discuss trauma mechanisms, physical examination, classification, and treatment including recurrent cases. After reading this case report the reader will be able to diagnose a superior dislocation of the patella with near certainty on physical examination and radiographic imaging of the knee alone.
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Affiliation(s)
- P W van Egmond
- Department of Orthopedic Surgery, VU Medical Centre Amsterdam, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands.
| | - M C Vermeulen
- Department of Radiology, Medical Centre Alkmaar, Alkmaar, The Netherlands
| | - C F van Dijke
- Department of Radiology, Medical Centre Alkmaar, Alkmaar, The Netherlands
| | - H C A Graat
- Department of Orthopedic Surgery, Medical Centre Alkmaar, Alkmaar, The Netherlands
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Jaspers CA, Kieft H, Speelberg B, Buiting A, van Marwijk Kooij M, Ruys GJ, Vincent HH, Vermeulen MC, Olink AG, Hoepelman IM. Meropenem versus cefuroxime plus gentamicin for treatment of serious infections in elderly patients. Antimicrob Agents Chemother 1998; 42:1233-8. [PMID: 9593156 PMCID: PMC105786 DOI: 10.1128/aac.42.5.1233] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
In this multicenter study, the efficacy of and tolerability for meropenem were compared with those for the combination of cefuroxime-gentamicin (+/- metronidazole) for the treatment of serious bacterial infections in patients > or = 65 years of age. A total of 79 patients were randomized; thirty-nine received meropenem (1 g/8 h), and 40 received cefuroxime (1.5 g/8 h) plus gentamicin (4 mg/kg of body weight daily) for 5 to 10 days. Metronidazole (500 mg/6 h) could be added to the cefuroxime-gentamicin regimen for the treatment of intra-abdominal infections (n = 10). Seventy patients were evaluable for clinical efficacy; the primary diagnoses were as follows: pneumonia in 41 patients (20 treated with meropenem, 21 treated with cefuroxime-gentamicin), intra-abdominal infection in 10 patients (7 meropenem, 3 cefuroxime-gentamicin-metronidazole), urinary tract infection (UTI) in 11 patients (6 meropenem, 5 cefuroxime-gentamicin), sepsis syndrome in 7 patients (4 meropenem, 3 cefuroxime-gentamicin), and "other" in 1 patient (cefuroxime-gentamicin). The pathogens isolated from 18 patients with bacteremia were as follows: Staphylococcus spp. (n = 2), Streptococcus spp. (n = 2), members of the family Enterobacteriaceae (n = 11), and Bacteroides spp. (n = 3). A satisfactory clinical response at the end of therapy was achieved in 26 of 37 (70%) and 24 of 33 (73%) evaluable patients treated with meropenem and combination therapy, respectively. Clinical success was achieved in 23 of 31 (74%) and 21 of 28 (75%) evaluable patients with infections other than UTIs, respectively. A satisfactory microbiological response occurred in 15 of 22 (68%) patients in the meropenem group compared with 12 of 19 (63%) treated with combination therapy. Renal failure occurred during therapy in 2 of 39 (5%) meropenem recipients compared with 5 of 40 (13%) of those treated with combination therapy. The findings in this small study indicate that meropenem is as efficacious for and as well tolerated by elderly patients as the combination of cefuroxime-gentamicin (+/- metronidazole).
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Affiliation(s)
- C A Jaspers
- Department of Medicine, University Hospital Utrecht, The Netherlands
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