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Marie MA, Sanderlin EJ, Hoffman AP, Cashwell KD, Satturwar S, Hong H, Sun Y, Yang LV. GPR4 Knockout Attenuates Intestinal Inflammation and Forestalls the Development of Colitis-Associated Colorectal Cancer in Murine Models. Cancers (Basel) 2023; 15:4974. [PMID: 37894341 PMCID: PMC10605520 DOI: 10.3390/cancers15204974] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 10/09/2023] [Accepted: 10/12/2023] [Indexed: 10/29/2023] Open
Abstract
GPR4 is a proton-sensing G protein-coupled receptor highly expressed in vascular endothelial cells and has been shown to potentiate intestinal inflammation in murine colitis models. Herein, we evaluated the proinflammatory role of GPR4 in the development of colitis-associated colorectal cancer (CAC) using the dextran sulfate sodium (DSS) and azoxymethane (AOM) mouse models in wild-type and GPR4 knockout mice. We found that GPR4 contributed to chronic intestinal inflammation and heightened DSS/AOM-induced intestinal tumor burden. Tumor blood vessel density was markedly reduced in mice deficient in GPR4, which correlated with increased tumor necrosis and reduced tumor cell proliferation. These data demonstrate that GPR4 ablation alleviates intestinal inflammation and reduces tumor angiogenesis, development, and progression in the AOM/DSS mouse model.
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Affiliation(s)
- Mona A. Marie
- Department of Internal Medicine, Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA; (M.A.M.)
| | - Edward J. Sanderlin
- Department of Internal Medicine, Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA; (M.A.M.)
| | - Alexander P. Hoffman
- Department of Internal Medicine, Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA; (M.A.M.)
| | - Kylie D. Cashwell
- Department of Internal Medicine, Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA; (M.A.M.)
| | - Swati Satturwar
- Department of Pathology, Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA
| | - Heng Hong
- Department of Pathology, Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA
- Department of Pathology, Wake Forest University, Winston-Salem, NC 27157, USA
| | - Ying Sun
- Department of Pathology, Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA
| | - Li V. Yang
- Department of Internal Medicine, Brody School of Medicine, East Carolina University, Greenville, NC 27834, USA; (M.A.M.)
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Kazemzadeh S, Hoffman AP, Pumphrey CM, Yee MA. Treatment of a Ballistic Radius Fracture with Segmental Bone Loss Using the Masquelet Technique in a Child: A Case Report. JBJS Case Connect 2023; 13:01709767-202309000-00083. [PMID: 37708323 DOI: 10.2106/jbjs.cc.23.00305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 09/16/2023]
Abstract
CASE A 4-year-old boy sustained an accidental self-inflicted gunshot wound to the left forearm. Radiographs revealed a comminuted mid-diaphyseal ballistic radius fracture with a critical-sized bone defect. The fracture was treated with the placement of a flexible intramedullary nail and antibiotic cement spacer, followed by second-stage bone grafting and open reduction and internal fixation of the radius 6 weeks later. Four months after the second-stage procedure, the radial defect healed appropriately without complications. CONCLUSION In this case of a pediatric comminuted mid-diaphyseal radius fracture with bone loss, the induced membrane technique resulted in healing across a critical-sized bone defect.
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Affiliation(s)
- Sina Kazemzadeh
- Corewell Health/Michigan State University, Grand Rapids, Michigan
| | | | - Conor M Pumphrey
- The University of Tennessee College of Medicine at Chattanooga, Chattanooga, Tennessee
| | - Michael A Yee
- Department of Orthopedic Surgery, The University of Tennessee College of Medicine at Chattanooga, Chattanooga, Tennessee
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Ochsner MG, Hoffman AP, DiPasquale D, Cole FJ, Rozycki GS, Webster DW, Champion HR. Associated aortic rupture-pelvic fracture: an alert for orthopedic and general surgeons. J Trauma 1992; 33:429-34. [PMID: 1404514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Blunt trauma patients with pelvic fractures have been shown to have a two-fold to five-fold increased risk of aortic rupture compared with the overall blunt trauma population. A retrospective review was performed to determine whether the relationship between aortic rupture and pelvic fracture could be further delineated using a pelvic fracture classification based on mechanism of injury. Of 4,157 consecutive blunt trauma patients, 371 (8.9%) had pelvic fractures, 34 (0.8%) had ruptured thoracic aortas and 12 had both injuries. When pelvic fractures were classified according to vector of force, 10 of 12 (83%) aortic ruptures occurred in patients with an anterior-posterior compression fracture pattern, an incidence of aortic rupture eight times greater than that of the overall blunt trauma population. There was no increased incidence of aortic rupture among patients with any other pelvic fracture pattern. We conclude that the previously reported association between aortic rupture and pelvic fracture can be further specified to include, predominantly, those patients with an anterior-posterior compression fracture pattern.
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Affiliation(s)
- M G Ochsner
- Uniformed Services University of the Health Sciences, Bethesda, Maryland
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Mitchell AO, Hoffman AP, Swartz SE, Ghosh BC. An unusual occurrence of endometriosis in the right groin: a case report and review of the literature. Mil Med 1991; 156:633-4. [PMID: 1771015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
A case of endometriosis involving the superficial femoral lymphatic chain is presented. We feel that it is significant due to the rare location and the implications for diagnosis and therapy. It is our opinion that endometriosis should be included in the differential diagnosis of groin masses in menstruating women. A brief review of pertinent literature is also presented.
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Affiliation(s)
- A O Mitchell
- Uniformed Services University of the Health Sciences, Bethesda, MD
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