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McKeon M, McCoy N, Johnson C, Allen J, Altaye M, Amin M, Bayan S, Belafsky P, DeSilva B, Dion G, Ekbom D, Friedman A, Fritz M, Giliberto JP, Guardiani E, Kasperbauer J, Kim B, Krekeler BN, Kuhn M, Kwak P, Ma Y, Madden LL, Matrka L, Mayerhoff R, Piraka C, Rosen CA, Tabangin M, Wahab S, Wilson K, Wright C, Young VN, Postma G, Howell RJ. Postoperative Care of Zenker Diverticula: Contemporary Perspective from the Prospective OUtcomes Cricopharyngeaus Hypertonicity (POUCH) Collaborative. Laryngoscope 2024; 134:2678-2683. [PMID: 38146791 DOI: 10.1002/lary.31226] [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: 04/21/2023] [Revised: 11/02/2023] [Accepted: 11/27/2023] [Indexed: 12/27/2023]
Abstract
OBJECTIVES The aim of the study was to identify trends in postoperative management of persons undergoing surgery for Zenker diverticula (ZD) by evaluating length of stay (LOS), diet on discharge, and imaging with or without surgical complication. METHODS Prospectively enrolled adult patients with cricopharyngeal muscle dysfunction with diverticula undergoing surgery from August 1, 2017 to February 1, 2023 were included. Data were extracted from a multi-institutional REDCap database, summarizing means, medians, percentages, and frequencies. Fisher's exact or chi squared analyses were utilized, as appropriate, to compare subsets of data. Descriptive analysis assessed differences in clinical course and the relationship to postoperative management. RESULTS There were 298 patients with a mean (standard deviation) age of 71.8 (11.2) years and 60% male. Endoscopic surgery was performed in 79.5% (237/298) of patients versus 20.5% (61/298) open surgery. Sixty patients (20.1%) received postoperative imaging, with four leaks identified. Complications were identified in 9.4% of cases (n = 29 complications in 28 patients), more commonly in open surgery. Most (81.2%) patients were discharged within 23 h. About half of patients (49%) were discharged from the hospital on a pureed/liquid diet; 36% had been advanced to a soft diet. In patients without complications, LOS was significantly longer following open cases (p = 0.002); postoperative diet was not different between open and endoscopic (p = 0.26). CONCLUSIONS Overall, most patients are discharged within 23 h without imaging. However, LOS was affected by surgical approach. Postoperative complications are different in endoscopic versus open surgery. Complications with either approach were associated with prolonged LOS, need for imaging, and diet restriction. LEVEL OF EVIDENCE Level III Laryngoscope, 134:2678-2683, 2024.
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Affiliation(s)
- Mallory McKeon
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
| | - Nicole McCoy
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
| | - Christopher Johnson
- Department of Otolaryngology-Head and Neck Surgery, Medical College of Georgia at Augusta University Health, Augusta, Georgia, U.S.A
| | - Jacqui Allen
- Department of Surgery, University of Auckland, Auckland, New Zealand
| | - Mekibib Altaye
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, U.S.A
| | - Milan Amin
- Department of Otolaryngology-Head and Neck Surgery, New York University, New York, New York, U.S.A
| | - Semirra Bayan
- Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, U.S.A
| | - Peter Belafsky
- Department of Otolaryngology-Head and Neck Surgery, University of California - Davis, Davis, California, U.S.A
| | - Brad DeSilva
- Department of Otolaryngology-Head and Neck Surgery, Ohio State University, Columbus, Ohio, U.S.A
| | - Greg Dion
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
| | - Dale Ekbom
- Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, U.S.A
| | - Aaron Friedman
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
| | - Mark Fritz
- Department of Otolaryngology-Head and Neck Surgery, University of Kentucky, Lexington, Kentucky, U.S.A
| | - John Paul Giliberto
- Department of Otolaryngology-Head and Neck Surgery, University of Washington, Seattle, Washington, U.S.A
| | - Elizabeth Guardiani
- Department of Otolaryngology-Head and Neck Surgery, University of Maryland, Baltimore, Maryland, U.S.A
| | - Jan Kasperbauer
- Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, U.S.A
| | - Brandon Kim
- Department of Otolaryngology-Head and Neck Surgery, Ohio State University, Columbus, Ohio, U.S.A
| | - Brittany N Krekeler
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
- Department of Neurology and Rehabilitation Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
- Department of Communication Sciences and Disorders, College of Allied Health Sciences, University of Cincinnati, Cincinnati, Ohio, U.S.A
| | - Maggie Kuhn
- Department of Otolaryngology-Head and Neck Surgery, University of California - Davis, Davis, California, U.S.A
| | - Paul Kwak
- Department of Otolaryngology-Head and Neck Surgery, New York University, New York, New York, U.S.A
| | - Yue Ma
- Department of Otolaryngology-Head and Neck Surgery, University of California - San Francisco, San Francisco, California, U.S.A
| | - Lyndsay L Madden
- Department of Otolaryngology-Head and Neck Surgery, Wake Forest University, Winston-Salem, North Carolina, U.S.A
| | - Laura Matrka
- Department of Otolaryngology-Head and Neck Surgery, Ohio State University, Columbus, Ohio, U.S.A
| | - Ross Mayerhoff
- Department of Otolaryngology-Head and Neck Surgery, Henry Ford Health System, Detroit, Michigan, U.S.A
| | - Cyrus Piraka
- Department of Gastroenterology/Hepatology, Henry Ford Health System, Detroit, Michigan, U.S.A
| | - Clark A Rosen
- Department of Otolaryngology-Head and Neck Surgery, University of California - San Francisco, San Francisco, California, U.S.A
| | - Meredith Tabangin
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, U.S.A
| | - Shaun Wahab
- Department of Radiology, University of Cincinnati, Cincinnati, Ohio, U.S.A
| | - Keith Wilson
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
| | - Carter Wright
- Department of Otolaryngology-Head and Neck Surgery, Wake Forest University, Winston-Salem, North Carolina, U.S.A
| | - VyVy N Young
- Department of Otolaryngology-Head and Neck Surgery, University of California - San Francisco, San Francisco, California, U.S.A
| | - Gregory Postma
- Department of Otolaryngology-Head and Neck Surgery, Medical College of Georgia at Augusta University Health, Augusta, Georgia, U.S.A
| | - Rebecca J Howell
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
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Howell R, Johnson C, Allen J, Altaye M, Amin M, Bayan S, Belafsky P, Cervenka B, Desilva B, Dion GR, Ekbom D, Friedman A, Fritz M, Giliberto JP, Guardiani E, Kasperbauer J, Kim B, Krekeler BN, Kuhn M, Kwak P, Ma Y, Madden LL, Matrka L, Mayerhoff R, McKeon M, Piraka C, Rosen CA, Tabangin M, Wahab SA, Wilson K, Wright C, Young VN, Postma G. Surgical Outcomes in Zenker Diverticula: A Multicenter, Prospective, Longitudinal Study. Laryngoscope 2024; 134:97-102. [PMID: 37191092 DOI: 10.1002/lary.30753] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 03/10/2023] [Revised: 04/19/2023] [Accepted: 05/03/2023] [Indexed: 05/17/2023]
Abstract
OBJECTIVE To compare improvement in patient-reported outcomes (PROM) in persons undergoing endoscopic and open surgical management of Zenker diverticula (ZD). METHODOLOGY Prospective, multicenter cohort study of all individuals enrolled in the Prospective OUtcomes of Cricopharyngeus Hypertonicity (POUCH) Collaborative who underwent surgery for ZD. Patient survey, radiography reports, and the 10-item Eating Assessment Tool (EAT-10) pre- and post-procedure were abstracted from a REDCap database, which summarized means, medians, percentages, and frequencies of. Outcome based on operative intervention (endoscopic vs. open) was compared using t-test, Wilcoxon rank sum test or chi-square test, as appropriate. RESULTS One hundred and forty-seven persons were prospectively followed. The mean age (SD) of the cohort was 68.7 (11.0). Overall, 66% of patients reported 100% improvement in EAT-10; 81% of patients had greater than 75% improvement; and 88% had greater than 50% improvement. Endoscopic was used for n = 109 patients, and open surgical intervention was used for n = 38. The median [interquartile range, IQR] EAT-10 percent improvement for endoscopic treatment was 93.3% [72, 100], and open was 100% [92.3, 100] (p = 0.05). The incidence of intraoperative complications was 3.7% for endoscopic and 7.9% for open surgical management. The median [IQR] in follow-up was 86 and 97.5 days, respectively. CONCLUSION Both endoscopic and open surgical management of ZD provide significant improvement in patient-reported outcomes. The data suggest that open diverticulectomy may provide a modest advantage in symptomatic improvement compared to endoscopic management. The data suggest that the postoperative complication rate is higher in the open surgical group. LEVEL OF EVIDENCE 3 Laryngoscope, 134:97-102, 2024.
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Affiliation(s)
- Rebecca Howell
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
| | - Christopher Johnson
- Department of Otolaryngology-Head and Neck Surgery, Medical College of Georgia at Augusta University, Augusta, Georgia, U.S.A
| | - Jacqui Allen
- Department of Surgery, University of Auckland, Auckland, New Zealand
| | - Mekibib Altaye
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, U.S.A
| | - Milan Amin
- Department of Otolaryngology-Head and Neck Surgery, New York University Grossman School of Medicine, New York, New York, U.S.A
| | - Semirra Bayan
- Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, U.S.A
| | - Peter Belafsky
- Department of Otolaryngology-Head and Neck Surgery, University of California-Davis, Davis, California, U.S.A
| | - Brian Cervenka
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
| | - Brad Desilva
- Department of Otolaryngology-Head and Neck Surgery, Ohio State University, Columbus, Ohio, U.S.A
| | - Gregory R Dion
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
| | - Dale Ekbom
- Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, U.S.A
| | - Aaron Friedman
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
| | - Mark Fritz
- Department of Otolaryngology-Head and Neck Surgery, University of Kentucky, Lexington, Kentucky, U.S.A
| | - John Paul Giliberto
- Department of Otolaryngology-Head and Neck Surgery, University of Washington, Seattle, Washington, U.S.A
| | - Elizabeth Guardiani
- Department of Otolaryngology-Head and Neck Surgery, University of Maryland, Baltimore, Maryland, U.S.A
| | - Jan Kasperbauer
- Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, U.S.A
| | - Brandon Kim
- Department of Otolaryngology-Head and Neck Surgery, Ohio State University, Columbus, Ohio, U.S.A
| | - Brittany N Krekeler
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
- Department of Neurology and Rehabilitation Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
- Department of Communication Sciences and Disorders, University of Cincinnati College of Allied Health Sciences, Cincinnati, Ohio, U.S.A
| | - Maggie Kuhn
- Department of Otolaryngology-Head and Neck Surgery, University of California-Davis, Davis, California, U.S.A
| | - Paul Kwak
- Department of Otolaryngology-Head and Neck Surgery, New York University Grossman School of Medicine, New York, New York, U.S.A
| | - Yue Ma
- Department of Otolaryngology-Head and Neck Surgery, University of California-San Francisco, San Francisco, California, U.S.A
| | - Lyndsay L Madden
- Department of Otolaryngology-Head and Neck Surgery, Wake Forest University, Winston-Salem, North Carolina, U.S.A
| | - Laura Matrka
- Department of Otolaryngology-Head and Neck Surgery, Ohio State University, Columbus, Ohio, U.S.A
| | - Ross Mayerhoff
- Department of Otolaryngology-Head and Neck Surgery, Henry Ford Health System, Detroit, Michigan, U.S.A
| | - Mallory McKeon
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
| | - Cyrus Piraka
- Department of Gastroenterology/Hepatology, Henry Ford Health System, Detroit, Michigan, U.S.A
| | - Clark A Rosen
- Department of Otolaryngology-Head and Neck Surgery, University of California-San Francisco, San Francisco, California, U.S.A
| | - Meredith Tabangin
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, U.S.A
| | - Shaun A Wahab
- Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
| | - Keith Wilson
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
| | - Carter Wright
- Department of Otolaryngology-Head and Neck Surgery, Wake Forest University, Winston-Salem, North Carolina, U.S.A
| | - VyVy N Young
- Department of Otolaryngology-Head and Neck Surgery, University of California-San Francisco, San Francisco, California, U.S.A
| | - Gregory Postma
- Department of Otolaryngology-Head and Neck Surgery, Medical College of Georgia at Augusta University, Augusta, Georgia, U.S.A
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Howell R, Tang A, Allen J, Altaye M, Amin M, Bayan S, Belafsky P, Cervenka B, deSilva B, Dion G, Ekbom D, Friedman A, Fritz M, Giliberto JP, Guardiani E, Harmon J, Kasperbauer JL, Khosla S, Kim B, Kuhn M, Kwak P, Ma Y, Madden L, Matrka L, Mayerhoff R, Piraka C, Rosen C, Tabangin ME, Wahab SA, Wilson K, Wright SC, Young V, Yuen S, Postma GN. Killian Jamieson Diverticulum, the Great Mimicker: A Case Series and Contemporary Review. Laryngoscope 2023; 133:2110-2115. [PMID: 36453465 DOI: 10.1002/lary.30508] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 10/12/2022] [Accepted: 10/14/2022] [Indexed: 12/03/2022]
Abstract
OBJECTIVE To assess barium esophagram (BAS) as a diagnostic marker for patients with Killian Jamieson diverticula (KJD). METHODS Prospective, multicenter cohort study of individuals enrolled in the Prospective OUtcomes of Cricopharyngeus Hypertonicity (POUCH) Collaborative. Patient demographics, comorbidities, radiographic imaging reports, laryngoscopy findings, patient-reported outcome measures (PROM), and operative reporting were abstracted from a REDCap database and summarized using means, medians, percentages, frequencies. Paired t-tests and Wilcoxon Signed Rank test were used to test pre- to post-operative differences in RSI, EAT-10, and VHI-10 scores. Diagnostic test evaluation including sensitivity, specificity, positive, and negative predictive value with 95% confidence intervals were calculated comparing BAS findings to operative report. RESULTS A total of 287 persons were enrolled; 13 (4%) patients were identified with confirmed KJD on operative reports. 100% underwent open transcervical excision. BAS has a 46.2% (95% confidence interval [CI]: 23.2, 70.9) sensitivity and 97.8% (95% CI: 95.3, 99.0) specificity in detecting a KJD and 50% (95% CI: 25.4, 74.6) positive predictive value but 97.4% (95%CI: 94.8, 98.7) negative predictive value. Preoperatively, patients reported mean (SD) RSI and EAT-10 of 19.4 (9) and 8.3 (7.5) accordingly. Postoperatively, patients reported mean (SD) RSI and EAT-10 as 5.4 (6.2) and 2.3 (3.3). Both changes in RSI and EAT-10 were statistically significant (p = 0.008, p = 0.03). CONCLUSION KJD are rare and represent <5% of hypopharyngeal diverticula undergoing surgical intervention. Open transcervical surgery significantly improves symptoms of dysphagia. BAS has high specificity but low sensitivity in detecting KJD. LEVEL OF EVIDENCE 4 Laryngoscope, 133:2110-2115, 2023.
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Affiliation(s)
- Rebecca Howell
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati, Cincinnati, Ohio, USA
| | - Alice Tang
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati, Cincinnati, Ohio, USA
| | - Jacqui Allen
- Department of Surgery, University of Auckland, Auckland, New Zealand
| | - Mekibib Altaye
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Milan Amin
- Department of Otolaryngology-Head and Neck Surgery, New York University, New York, New York, USA
| | - Semirra Bayan
- Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Peter Belafsky
- Department of Otolaryngology-Head and Neck Surgery, University of California, Davis, Davis, California, USA
| | - Brian Cervenka
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati, Cincinnati, Ohio, USA
| | - Brad deSilva
- Department of Otolaryngology-Head and Neck Surgery, Ohio State University, Columbus, Ohio, USA
| | - Greg Dion
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati, Cincinnati, Ohio, USA
| | - Dale Ekbom
- Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Aaron Friedman
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati, Cincinnati, Ohio, USA
| | - Mark Fritz
- Department of Otolaryngology-Head and Neck Surgery, University of Kentucky, Lexington, Kentucky, USA
| | - John Paul Giliberto
- Department of Otolaryngology-Head and Neck Surgery, University of Washington, Seattle, Washington, USA
| | - Elizabeth Guardiani
- Department of Otolaryngology-Head and Neck Surgery, Wake Forest University, Winston-Salem, North Carolina, USA
| | - Jeffrey Harmon
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati, Cincinnati, Ohio, USA
| | - Jan L Kasperbauer
- Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Sid Khosla
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati, Cincinnati, Ohio, USA
| | - Brandon Kim
- Department of Otolaryngology-Head and Neck Surgery, Ohio State University, Columbus, Ohio, USA
| | - Maggie Kuhn
- Department of Otolaryngology-Head and Neck Surgery, University of California, Davis, Davis, California, USA
| | - Paul Kwak
- Department of Otolaryngology-Head and Neck Surgery, New York University, New York, New York, USA
| | - Yue Ma
- Department of Otolaryngology-Head and Neck Surgery, University of California - San Francisco, San Francisco, California, USA
| | - Lyndsay Madden
- Department of Otolaryngology-Head and Neck Surgery, Wake Forest University, Winston-Salem, North Carolina, USA
| | - Laura Matrka
- Department of Otolaryngology-Head and Neck Surgery, Ohio State University, Columbus, Ohio, USA
| | - Ross Mayerhoff
- Department of Otolaryngology-Head and Neck Surgery, Henry Ford Health System, Detroit, Michigan, USA
| | - Cyrus Piraka
- Department of Gastroenterology/Hepatology, Henry Ford Health System, Detroit, Michigan, USA
| | - Clark Rosen
- Department of Otolaryngology-Head and Neck Surgery, University of California - San Francisco, San Francisco, California, USA
| | - Meredith E Tabangin
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Shaun A Wahab
- Department of Radiology, University of Cincinnati, Cincinnati, Ohio, USA
| | - Keith Wilson
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati, Cincinnati, Ohio, USA
| | - S Carter Wright
- Department of Otolaryngology-Head and Neck Surgery, Wake Forest University, Winston-Salem, North Carolina, USA
- Department of Otolaryngology-Head and Neck Surgery, University of Maryland, Baltimore, Maryland, USA
| | - Vyvy Young
- Department of Otolaryngology-Head and Neck Surgery, University of California - San Francisco, San Francisco, California, USA
| | - Sonia Yuen
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati, Cincinnati, Ohio, USA
| | - Gregory N Postma
- Department of Otolaryngology-Head and Neck Surgery, Medical College of Georgia at Augusta University Health, Augusta, Georgia, USA
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Kwak P, Wesolowoski M, Baker K, Joyce C, Lowery E. Use of Cyclosporine Leads to Poorer Outcomes in Patients with Cystic Fibrosis Following Lung Transplant. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.725] [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] [Indexed: 11/30/2022] Open
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Abstract
The accumulation of tissue cholesterol and cholesteryl esters is commonly seen during the development of both atherosclerosis and glomerulosclerosis. The intracellular cholesterol content is regulated, in part, by the hydrolysis of cholesteryl esters to cholesterol, a reaction catalyzed by cholesterol esterase. Decreased cholesterol esterase has been linked to cholesteryl ester accumulation in vascular cells and has been postulated to be an important factor in the progression of atherosclerosis and, possibly, glomerulosclerosis. In order to determine whether cholesterol esterase regulates glomerular cholesterol accumulation, the effect of cholesterol feeding on the cholesterol content and the activity of cholesterol esterase was examined in rat glomeruli. Cholesterol esterase was measured using a cholesteryl[1-14C]oleate-lecithin liposome substrate. Total and free glomerular cholesterol was measured spectrofluorometrically. Feeding rats 4% cholesterol for 2 months decreased total glomerular (acid plus neutral) cholesterol esterase activity when compared to glomeruli from similar rats fed a normal chow (1.8 +/- 0.1 versus 1.48 +/- 0.2 nmol/mg protein/h, p < 0.05). Total, free and esterified cholesterol concentrations were higher in glomeruli from cholesterol-fed rats than from controls, consistent with decreased cholesterol esterase activity. Thus, glomerular cholesterol accumulation appears to be regulated by cholesterol esterase. This finding is similar to that in other vascular tissues which have been investigated and which are prone to accumulate cholesterol during the development of atherosclerosis.
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Affiliation(s)
- D D Roh
- Department of Veterans Affairs Medical Center, Long Beach 90822
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