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Dong J, Grant C, Vuong B, Nishioka N, Gao AH, Beatty M, Baldwin G, Bailargeon A, Bablouzian A, Grahmann P, Bhat N, Ryan E, Barrios A, Giddings S, Ford T, Beaulieu-Ouellet E, Hosseiny SH, Lerman I, Trasischker W, Reddy R, Singh K, Gora M, Hyun D, Queneherve L, Wallace M, Wolfsen H, Sharma P, Wang KK, Leggett CL, Poneros J, Abrams JA, Lightdale C, Leeds S, Rosenberg M, Tearney G. Feasibility and Safety of Tethered Capsule Endomicroscopy in Patients With Barrett's Esophagus in a Multi-Center Study. Clin Gastroenterol Hepatol 2022; 20:756-765.e3. [PMID: 33549871 PMCID: PMC8715859 DOI: 10.1016/j.cgh.2021.02.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [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: 01/08/2021] [Accepted: 02/02/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Tethered capsule endomicroscopy (TCE) involves swallowing a small tethered pill that implements optical coherence tomography (OCT) imaging, procuring high resolution images of the whole esophagus. Here, we demonstrate and evaluate the feasibility and safety of TCE and a portable OCT imaging system in patients with Barrett's esophagus (BE) in a multi-center (5-site) clinical study. METHODS Untreated patients with BE as per endoscopic biopsy diagnosis were eligible to participate in the study. TCE procedures were performed in unsedated patients by either doctors or nurses. After the capsule was swallowed, the device continuously obtained 10-μm-resolution cross-sectional images as it traversed the esophagus. Following imaging, the device was withdrawn through mouth, and disinfected for subsequent reuse. BE lengths were compared to endoscopy findings when available. OCT-TCE images were compared to volumetric laser endomicroscopy (VLE) images from a patient who had undergone VLE on the same day as TCE. RESULTS 147 patients with BE were enrolled across all sites. 116 swallowed the capsule (79%), 95/114 (83.3%) men and 21/33 (63.6%) women (P = .01). High-quality OCT images were obtained in 104/111 swallowers (93.7%) who completed the procedure. The average imaging duration was 5.55 ± 1.92 minutes. The mean length of esophagus imaged per patient was 21.69 ± 5.90 cm. A blinded comparison of maximum extent of BE measured by OCT-TCE and EGD showed a strong correlation (r = 0.77-0.79). OCT-TCE images were of similar quality to those obtained by OCT-VLE. CONCLUSIONS The capabilities of TCE to be used across multiple sites, be administered to unsedated patients by either physicians or nurses who are not expert in OCT-TCE, and to rapidly and safely evaluate the microscopic structure of the esophagus make it an emerging tool for screening and surveillance of BE patients. Clinical trial registry website and trial number: NCT02994693 and NCT03459339.
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Affiliation(s)
- Jing Dong
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA,Harvard Medical School, MA
| | - Catriona Grant
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA
| | - Barry Vuong
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA,Harvard Medical School, MA
| | - Norman Nishioka
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA,Harvard Medical School, MA
| | - Anna Huizi Gao
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA
| | - Matthew Beatty
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA
| | - Grace Baldwin
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA
| | - Aaron Bailargeon
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA
| | - Ara Bablouzian
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA
| | - Patricia Grahmann
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA
| | - Nitasha Bhat
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA
| | - Emily Ryan
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA
| | - Amilcar Barrios
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA
| | - Sarah Giddings
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA
| | - Timothy Ford
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA,Harvard Medical School, MA
| | | | | | - Irene Lerman
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA
| | - Wolfgang Trasischker
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA,Harvard Medical School, MA
| | - Rohith Reddy
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA,Harvard Medical School, MA
| | - Kanwarpal Singh
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA,Harvard Medical School, MA
| | - Michalina Gora
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA,Harvard Medical School, MA,ICube Laboratory, CNRS, Strasbourg University, France
| | - Daryl Hyun
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA
| | - Lucille Queneherve
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA,Harvard Medical School, MA
| | - Michael Wallace
- Division of Gastroenterology and Hepatology, Mayo Clinic Jacksonville, FL
| | - Herbert Wolfsen
- Division of Gastroenterology and Hepatology, Mayo Clinic Jacksonville, FL
| | - Prateek Sharma
- Department of Gastroenterology, Kansas City Veterans Administration and University of Kansas School of Medicine, MO
| | - Kenneth K. Wang
- Division of Gastroenterology and Hepatology,, Mayo Clinic Rochester, MN
| | - Cadman L. Leggett
- Division of Gastroenterology and Hepatology,, Mayo Clinic Rochester, MN
| | | | | | | | | | - Mireille Rosenberg
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA,Harvard Medical School, MA
| | - Guillermo Tearney
- Wellman Center for Photomedicine, Massachusetts General Hospital, MA,Harvard Medical School, MA,Department of Pathology, Massachusetts General Hospital, MA,Harvard-MIT Division of Health Science and Technology (HST)
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Lim HK, Lee JH, Hyun D, Park JW, Kim JL, Lee HY, Park S, Ahn JH, Baek JH, Choi CG. MR diagnosis of facial neuritis: diagnostic performance of contrast-enhanced 3D-FLAIR technique compared with contrast-enhanced 3D-T1-fast-field echo with fat suppression. AJNR Am J Neuroradiol 2011; 33:779-83. [PMID: 22207300 DOI: 10.3174/ajnr.a2851] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Current MRI with the CE T1-weighted sequence plays a limited role in the evaluation of facial neuritis due to prominent normal facial nerve enhancement. Our purpose was to retrospectively investigate the usefulness of the CE 3D-FLAIR sequence compared with the CE 3D-T1-FFE sequence in facial neuritis patients. MATERIALS AND METHODS We assessed 36 consecutive patients who underwent temporal bone MR imaging at 3T for idiopathic facial palsy. Two readers independently reviewed CE 3D-T1-FFE and CE 3D-FLAIR images to determine the degree of enhancement in each of 5 segments of the facial nerve. We compared AUCs using the Z-test, compared diagnostic performance of 2 MR techniques with the McNemar test, and evaluated interobserver agreement. The Pearson χ(2) test was used for each segment of the facial nerve. RESULTS The AUC of CE 3D-FLAIR (reader 1, 0.754; reader 2, 0.746) was greater than that of CE 3D-T1-FFE (reader 1, 0.624; reader 2, 0.640; P < .001). The diagnostic sensitivities, specificities, and accuracies were 97.2%, 86.1%, and 91.7%, respectively, for CE 3D-FLAIR, and 100%, 56.9%, and 78.5%, respectively, for CE 3D-T1-FFE. The specificity and accuracy of CE 3D-FLAIR were greater than those of CE 3D-T1-FFE (specificity, P = .029; accuracy, P = .008). The interobserver agreements for CE 3D-FLAIR (κ-value, 0.831) and CE 3D-T1-FFE (κ-value, 0.694) were excellent. Enhancement of the canalicular and anterior genu segments on CE 3D-FLAIR were significantly correlated with the occurrence of facial neuritis (P < .001 for canalicular; P = .032 and 0.020 for anterior genu by reader 1 and reader 2, respectively). CONCLUSIONS CE 3D-FLAIR can improve the specificity and overall accuracy of MR imaging in patients with idiopathic facial palsy.
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Affiliation(s)
- H K Lim
- Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
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Lee M, Hyun D, Jenner P, Halliwell B. Effect of overexpression of wild-type and mutant Cu/Zn-superoxide dismutases on oxidative damage and antioxidant defences: relevance to Down's syndrome and familial amyotrophic lateral sclerosis. J Neurochem 2001; 76:957-65. [PMID: 11181815 DOI: 10.1046/j.1471-4159.2001.00107.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.8] [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: 11/20/2022]
Abstract
Patients with Down's syndrome (DS) show elevated levels of copper, zinc-containing superoxide dismutase (SOD1) and appear to have increased lipid peroxidation and oxidative damage to DNA as well as elevated glutathione peroxidase activity. Increasing SOD1 levels by gene transfection in NT-2 and SK-N-MC cell lines also led to a rise in glutathione peroxidase activity, but this was nevertheless accompanied by decreased proliferation rates, increased lipid peroxidation and protein carbonyls, and a trend to a rise in 8-hydroxyguanine and protein-bound 3-nitrotyrosine. Transfection of these cell lines with DNA encoding two mutant SOD1 enzymes (G37R and G85R) associated with familial amyotrophic lateral sclerosis (FALS), produced similar, but more severe changes, i.e. even lower growth rates, higher lipid peroxidation, 3-nitrotyrosine and protein carbonyl levels, decreased GSH levels, raised GSSG levels and higher glutathione peroxidase activities. Since G85R has little SOD activity, these changes cannot be related to increased O(2)(-) scavenging. In no case was SOD2 (mitochondrial Mn-SOD) level altered. Our cellular systems reproduce many of the biochemical changes observed in patients with DS or ALS, and in transgenic mice overexpressing mutant SOD1. They also show the potentially deleterious effects of SOD1 overexpression on cellular proliferation, which may be relevant to abnormal development in DS.
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Affiliation(s)
- M Lee
- Wolfson Centre for Age-Related Diseases, Guy's, King's and St. Thomas' School of Biomedical Sciences, King's College London, UK
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