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Ozturk NB, Bartosek N, Toruner MD, Mumtaz A, Simsek C, Dao D, Saberi B, Gurakar A. Approach to Liver Transplantation: Is There a Difference between East and West? J Clin Med 2024; 13:1890. [PMID: 38610655 PMCID: PMC11012910 DOI: 10.3390/jcm13071890] [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: 02/24/2024] [Revised: 03/21/2024] [Accepted: 03/22/2024] [Indexed: 04/14/2024] Open
Abstract
Liver transplantation (LT) remains the only curative treatment for end-stage liver disease as well as acute liver failure. With the exponential increase in organ demand due to the increasing incidence and prevalence of liver diseases, the need to overcome the supply and demand mismatch has arisen. In this review, we discuss the current universal status of LT, emphasizing various LT practices worldwide.
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Affiliation(s)
- Nazli Begum Ozturk
- Department of Internal Medicine, Corewell Health William Beaumont University Hospital, Royal Oak, MI 48073, USA
| | - Nathanial Bartosek
- Department of Internal Medicine, Corewell Health William Beaumont University Hospital, Royal Oak, MI 48073, USA
| | | | - Aymen Mumtaz
- Division of Gastroenterology and Hepatology, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Cem Simsek
- Division of Gastroenterology and Hepatology, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Doan Dao
- Division of Gastroenterology and Hepatology, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Behnam Saberi
- Division of Gastroenterology and Hepatology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Ahmet Gurakar
- Division of Gastroenterology and Hepatology, Johns Hopkins University, Baltimore, MD 21205, USA
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Dao D, Komati R, Golas L, Skondra D. Multimodal imaging in Danon disease. J Fr Ophtalmol 2024; 47:103975. [PMID: 37872069 DOI: 10.1016/j.jfo.2023.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 06/29/2023] [Accepted: 08/16/2023] [Indexed: 10/25/2023]
Affiliation(s)
- D Dao
- University of Chicago, Department of Ophthalmology and Visual Sciences, J. Terry Ernest Ocular Imaging Center, Chicago, IL, USA
| | - R Komati
- University of Chicago, Department of Ophthalmology and Visual Sciences, J. Terry Ernest Ocular Imaging Center, Chicago, IL, USA
| | - L Golas
- University of Chicago, Department of Ophthalmology and Visual Sciences, J. Terry Ernest Ocular Imaging Center, Chicago, IL, USA
| | - D Skondra
- University of Chicago, Department of Ophthalmology and Visual Sciences, J. Terry Ernest Ocular Imaging Center, Chicago, IL, USA.
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Gupta A, Zorzi J, Ho WJ, Baretti M, Azad NS, Griffith P, Dao D, Kim A, Philosophe B, Georgiades C, Kamel I, Burkhart R, Liddell R, Hong K, Shubert C, Lafaro K, Meyer J, Anders R, Burns III W, Yarchoan M. Relationship of Hepatocellular Carcinoma Stage and Hepatic Function to Health-Related Quality of Life: A Single Center Analysis. Healthcare (Basel) 2023; 11:2571. [PMID: 37761768 PMCID: PMC10531156 DOI: 10.3390/healthcare11182571] [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: 08/04/2023] [Revised: 09/14/2023] [Accepted: 09/15/2023] [Indexed: 09/29/2023] Open
Abstract
Health-related quality of life (HRQoL) is known to be an important prognostic indicator and clinical endpoint for patients with hepatocellular carcinoma (HCC). However, the correlation of the Barcelona Clinic Liver Cancer (BCLC) stage with HRQoL in HCC has not been previously studied. We examined the relationship between BCLC stage, Child-Pugh (CP) score, and Eastern Cooperative Oncology Group (ECOG) performance status on HRQoL for patients who presented at a multidisciplinary liver cancer clinic. HRQoL was assessed using the Functional Assessment of Cancer Therapy-Hepatobiliary (FACT-Hep) questionnaire. Fifty-one patients met our inclusion criteria. The FACT-Hep total and subscales showed no significant association with BCLC stages (p = 0.224). Patients with CP B had significantly more impairment in FACT-Hep than patients with CP A. These data indicate that in patients with HCC, impaired liver function is associated with reduced quality of life, whereas the BCLC stage poorly correlates with quality of life metrics. Impairment of quality of life is common in HCC patients and further studies are warranted to determine the impact of early supportive interventions on HRQoL and survival outcomes.
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Affiliation(s)
- Amol Gupta
- The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins Hospital, Baltimore, MD 21287, USA; (J.Z.); (W.J.H.); (M.B.); (N.S.A.); (P.G.); (D.D.); (A.K.); (B.P.); (C.G.); (I.K.); (R.B.); (R.L.); (K.H.); (C.S.); (K.L.); (J.M.); (R.A.); (W.B.III); (M.Y.)
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Li D, Jia AY, Zorzi J, Griffith P, Kim AK, Dao D, Anders RA, Georgiades C, Liddell RP, Hong K, Azad NS, Ho WJ, Baretti M, Christenson E, Baghdadi A, Kamel IR, Meyer J, Ghabi E, Burkhart RA, Lafaro K, He J, Shubert C, Yarchoan M. Impact of the COVID-19 Pandemic on Liver Cancer Staging at a Multidisciplinary Liver Cancer Clinic. Ann Surg Open 2022; 3:e207. [PMID: 36590894 PMCID: PMC9782462 DOI: 10.1097/as9.0000000000000207] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 08/05/2022] [Indexed: 01/03/2023] Open
Abstract
To compare liver cancer resectability rates before and during the COVID-19 pandemic. Background Liver cancers usually present with nonspecific symptoms or are diagnosed through screening programs for at-risk patients, and early detection can improve patient outcomes. In 2020, the COVID-19 pandemic upended medical care across all specialties, but whether the pandemic was associated with delays in liver cancer diagnosis is not known. Methods We performed a retrospective review of all patients evaluated at the Johns Hopkins Multidisciplinary Liver Cancer Clinic from January 2019 to June 2021 with a new diagnosis of suspected or confirmed hepatocellular carcinoma (HCC) or biliary tract cancer (BTC). Results There were 456 liver cancer patients (258 HCC and 198 BTC). From January 2019 to March 2020 (pre-pandemic), the surgical resectability rate was 20%. The subsequent 6 months (early pandemic), the resectability rate decreased to 11%. Afterward from October 2020 to June 2021 (late pandemic), the resectability rate increased to 27%. The resectability rate early pandemic was significantly lower than that for pre-pandemic and later pandemic combined (11% lower; 95% confidence interval [CI], 2%-20%). There was no significant difference in resectability rates pre-pandemic and later pandemic (7% difference; 95% CI, -3% to 16%). In subgroup analyses, the early pandemic was associated with a larger impact in BTC resectability rates than HCC resectability rates. Time from BTC symptom onset until Multidisciplinary Liver Clinic evaluation increased by over 6 weeks early pandemic versus pre-pandemic (Hazard Ratio, 0.63; 95% CI, 0.44-0.91). Conclusions During the early COVID-19 pandemic, we observed a drop in the percentage of patients presenting with curable liver cancers. This may reflect delays in liver cancer diagnosis and contribute to excess mortality related to the COVID-19 pandemic.
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Affiliation(s)
- Daniel Li
- From the Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Angela Y. Jia
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Jane Zorzi
- From the Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Paige Griffith
- From the Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Amy K. Kim
- Department of Medicine, Gastroenterology and Hepatology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Doan Dao
- Department of Medicine, Gastroenterology and Hepatology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Robert A. Anders
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Christos Georgiades
- Department of Radiology and Radiological Sciences, Division of Vascular and Interventional Radiology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Robert P. Liddell
- Department of Radiology and Radiological Sciences, Division of Vascular and Interventional Radiology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Kelvin Hong
- Department of Radiology and Radiological Sciences, Division of Vascular and Interventional Radiology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Nilofer S. Azad
- From the Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Won Jin Ho
- From the Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Marina Baretti
- From the Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Eric Christenson
- From the Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Azarakhsh Baghdadi
- Department of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Ihab R. Kamel
- Department of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Jeffrey Meyer
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Elie Ghabi
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Richard A. Burkhart
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Kelly Lafaro
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Jin He
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Chris Shubert
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Mark Yarchoan
- From the Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD
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Taparra K, Deek M, Dao D, Chan L, Phillips R, Isaacsson Velho P, Gao R, Deville C, Song D, Greco S, Carducci M, Eisenberger M, DeWeese T, Denmeade S, Pienta K, Paller C, Antonarakis E, Park S, Tran P, Stish B. Modes of Failure Following Metastasis Directed Therapy in Patients with Oligometastatic Hormone Sensitive Prostate Cancer: A Multi-institutional Analysis. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.447] [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: 11/28/2022]
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Traoré S, Fokou G, Ndour A, Yougbare B, Koné P, Alonso S, Roesel K, Bakou S, Dao D, Grace D, Bonfoh B. Assessing knowledge, beliefs and practices related to the consumption of sheep and goat meat in Senegal. Global Food Security 2018. [DOI: 10.1016/j.gfs.2018.10.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ajmera V, Huang H, Dao D, Feld JJ, Lau DT, Patel K, Rule JA, Daly M, Lee WM, Chung RT. Host Genetic Variant in CXCL16 May Be Associated With Hepatitis B Virus-Related Acute Liver Failure. Cell Mol Gastroenterol Hepatol 2018; 7:477-479.e4. [PMID: 30827414 PMCID: PMC6409437 DOI: 10.1016/j.jcmgh.2018.09.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 09/11/2018] [Accepted: 09/17/2018] [Indexed: 12/23/2022]
Affiliation(s)
- Veeral Ajmera
- Division of Gastroenterology, University of California San Diego, San Diego, California,Corresponding author:
| | - Hailiang Huang
- Broad Institute of Massachusetts Institute of Technology and Harvard University, Cambridge, Massachusetts,Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Doan Dao
- Division of Gastroenterology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Jordan J. Feld
- Toronto Centre for Liver Disease, University of Toronto, Toronto, Canada
| | - Daryl T. Lau
- Liver Center, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Keyur Patel
- Toronto Centre for Liver Disease, University of Toronto, Toronto, Canada
| | - Jody A. Rule
- Division of Gastroenterology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Mark Daly
- Broad Institute of Massachusetts Institute of Technology and Harvard University, Cambridge, Massachusetts,Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - William M. Lee
- Division of Gastroenterology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Raymond T. Chung
- Division of Gastroenterology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
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Mohr J, Germain M, Winters M, Fraser S, Duong A, Garibaldi A, Simunovic N, Alsop D, Dao D, Bessemer R, Ayeni OR. Disinfection of human musculoskeletal allografts in tissue banking: a systematic review. Cell Tissue Bank 2016; 17:573-584. [PMID: 27665294 PMCID: PMC5116033 DOI: 10.1007/s10561-016-9584-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 09/09/2016] [Indexed: 01/12/2023]
Abstract
Musculoskeletal allografts are typically disinfected using antibiotics, irradiation or chemical methods but protocols vary significantly between tissue banks. It is likely that different disinfection protocols will not have the same level of microorganism kill; they may also have varying effects on the structural integrity of the tissue, which could lead to significant differences in terms of clinical outcome in recipients. Ideally, a disinfection protocol should achieve the greatest bioburden reduction with the lowest possible impact on tissue integrity. A systematic review of three databases found 68 laboratory and clinical studies that analyzed the microbial bioburden or contamination rates of musculoskeletal allografts. The use of peracetic acid–ethanol or ionizing radiation was found to be most effective for disinfection of tissues. The use of irradiation is the most frequently published method for the terminal sterilization of musculoskeletal allografts; it is widely used and its efficacy is well documented in the literature. However, effective disinfection results were still observed using the BioCleanse™ Tissue Sterilization process, pulsatile lavage with antibiotics, ethylene oxide, and chlorhexidine. The variety of effective methods to reduce contamination rate or bioburden, in conjunction with limited high quality evidence provides little support for the recommendation of a single bioburden reduction method.
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Affiliation(s)
- J Mohr
- Canadian Blood Services, 270 John Savage Ave., Dartmouth, NS, B3B 0H7, Canada
| | - M Germain
- Héma-Québec, 1070 Sciences-de-la-Vie Avenue, Quebec, QC, G1V 5C3, Canada
| | - M Winters
- Nelson Laboratories, 6280 South Redwood Road, Salt Lake City, UT, 84123-6600, USA
| | - S Fraser
- Canadian Blood Services, 270 John Savage Ave., Dartmouth, NS, B3B 0H7, Canada
| | - A Duong
- Department of Surgery, McMaster University, 293 Wellington St. N, Suite 110, Hamilton, ON, L8L 8E7, Canada
| | - A Garibaldi
- Department of Surgery, McMaster University, 293 Wellington St. N, Suite 110, Hamilton, ON, L8L 8E7, Canada
| | - N Simunovic
- Department of Surgery, McMaster University, 293 Wellington St. N, Suite 110, Hamilton, ON, L8L 8E7, Canada
| | - D Alsop
- Department of Surgery, McMaster University, 293 Wellington St. N, Suite 110, Hamilton, ON, L8L 8E7, Canada
| | - D Dao
- Department of Surgery, McMaster University, 293 Wellington St. N, Suite 110, Hamilton, ON, L8L 8E7, Canada
| | - R Bessemer
- Department of Surgery, McMaster University, 293 Wellington St. N, Suite 110, Hamilton, ON, L8L 8E7, Canada
| | - O R Ayeni
- Department of Surgery, McMaster University, 293 Wellington St. N, Suite 110, Hamilton, ON, L8L 8E7, Canada. .,McMaster University Medical Centre, 1200 Main St W, Room 4E15, Hamilton, ON, L8N 3Z5, Canada.
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Zacharias T, Wang W, Dao D, Wojciechowski H, Lee WM, Do S, Singal AG. HBV Outreach Programs Significantly Increase Knowledge and Vaccination Rates Among Asian Pacific Islanders. J Community Health 2016; 40:619-24. [PMID: 25476035 DOI: 10.1007/s10900-014-9975-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Hepatitis B virus (HBV) testing and vaccination rates remain low among Asian-American/Pacific Islanders (APIs) despite high rates of HBV infection. The aim of our study was to assess the effectiveness of an outreach campaign to increase HBV knowledge, testing, and vaccination among a cohort of APIs. Vietnamese Americans were invited to participate in a free HBV screening and vaccination outreach program though pubic service announcements. Attendees completed a survey to assess barriers to vaccination and HBV-related knowledge before and after a 30-min education session by a bilingual board-certified gastroenterologist. Among 98 participants, 100% (22/22) of HBV naïve patients were provided a HBV vaccination series at no cost and over 75% (14/18) of HBV-infected patients were connected to further medical care. Notable reported barriers to prior testing and/or vaccination were cost of the vaccine, concern about missing work for evaluation, and lack of provider recommendation. Knowledge levels about HBV risk factors, potential consequences, and treatment options were poor at baseline but significantly increased after the education session (49 vs. 64%, p < 0.001). Outreach campaigns linked with education can successfully address several barriers to HBV testing and offer an approach to improve HBV awareness and prevention among difficult-to-reach populations.
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Affiliation(s)
- Tresa Zacharias
- Division of Digestive and Liver Diseases, Department of Internal Medicine, Dedman Scholar of Clinical Care, University of Texas Southwestern Medical Center, 5959 Harry Hines Blvd, POB 1, Suite 420, Dallas, TX, 75390-8887, USA
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10
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Jain MK, Seremba E, Bhore R, Dao D, Joshi R, Attar N, Yuan HJ, Lee WM. Change in fibrosis score as a predictor of mortality among HIV-infected patients with viral hepatitis. AIDS Patient Care STDS 2012; 26:73-80. [PMID: 22239101 DOI: 10.1089/apc.2011.0191] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Noninvasive markers of liver fibrosis, measured at baseline, have been shown to predict liver-related mortality. It remains unknown if a change in the value of the scores over time predicts mortality in patients with HIV and viral hepatitis. In this retrospective study, survival in HIV/hepatitis B virus (HBV; n = 67), HIV/hepatitis C virus (HCV; n = 43), and HIV/HBV/HCV (n = 41) patients was examined using Kaplan-Meier life table analysis. Aspartate aminotransferase (AST)-to-platelet ratio index (APRI) and FIB-4 scores, two noninvasive markers of liver fibrosis, were calculated at baseline and at last available clinical follow-up to determine the change in fibrosis score. Factors associated with mortality were assessed by Cox proportional hazards, including the change in the noninvasive marker score between the two time points. All-cause mortality was determined by Social Security Death Index and chart review. Sixty-seven were coinfected with HIV/HBV, 43 with HIV/HCV, and 41 were triply infected (HIV/HBV/HCV). Kaplan-Meier analysis showed similar survival for the three groups at 7 years of follow-up (p = 0.10). However, median length of follow-up was lower in HIV/HCV (60.5; range 0-102) compared to HIV/HBV (75.7; 12.3-126.5) and HIV/HBV/HCV (80.0; 2.7-123) months, respectively, p = 0.02. Baseline fibrosis score (p = 0.002), an increase in the value for noninvasive measurements for fibrosis (p < 0.001), and the presence of HIV/HCV coinfection (p = 0.041) were each associated with higher risk for mortality. Baseline fibrosis score (p = 0.03) and an increase in FIB-4 score (p = 0.05) were independent predictors of all-cause mortality, but liver-related mortality was not evaluated. In this study, baseline fibrosis score was predictive of 7-year all-cause mortality. Further studies are needed in a prospective cohort to evaluate the predictive value of monitoring changes in fibrosis scores over time to predict mortality in patients with viral hepatitis.
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Affiliation(s)
- Mamta K. Jain
- Department of Internal Medicine, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas
| | - Emmanuel Seremba
- Department of Internal Medicine, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas
| | - Rafia Bhore
- Department of Clinical Sciences, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas
| | - Doan Dao
- Department of Internal Medicine, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas
| | - Reeti Joshi
- Department of Internal Medicine, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas
| | - Nahid Attar
- Department of Internal Medicine, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas
| | - He-Jun Yuan
- Department of Internal Medicine, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas
| | - William M. Lee
- Department of Internal Medicine, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas
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Li XH, Kishore AH, Dao D, Zheng W, Roman CA, Word RA. A novel isoform of microphthalmia-associated transcription factor inhibits IL-8 gene expression in human cervical stromal cells. Mol Endocrinol 2010; 24:1512-28. [PMID: 20573688 DOI: 10.1210/me.2009-0320] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Cervical ripening during pregnancy is a profound change in cervix structure and function characterized by increases in the proinflammatory cytokine IL-8 and dissolution of the cervical extracellular matrix. Relatively little is known about the molecular mechanisms that underlie these events. Here, we report identification of a novel isoform of micropthalmia-associated transcription factor in human cervical stromal cells (MiTF-CX) that is down-regulated 12-fold during cervical ripening and that represses expression of IL-8. Ectopic expression of MiTF-CX in human cervical stromal cells resulted in substantial suppression of endogenous IL-8 mRNA and protein expression, whereas expression of dominant negative MiTF-CX mutants with impaired DNA binding resulted in dramatic increases in IL-8 production. Gel shift, reporter gene, and chromatin immunoprecipitation assays revealed one strong binding site (E-box (-397) CACATG(-391)) in the human IL-8 promoter that was crucial for mediating transcriptional repression by MiTF-CX. Moreover, we show that MiTF-CX expression in the cervix was itself positively autoregulated via two E-box motifs within a 2.1-kb promoter fragment. We therefore propose that maintenance of cervical competency during pregnancy is an active process maintained through suppression of IL-8 by the transcription factor MiTF-CX. During cervical ripening, loss of MiTF-CX would result in significant up-regulation of IL-8 mRNA and protein synthesis, thereby leading to recruitment and activation of leukocytes within the cervix and dissolution of the extracellular matrix.
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Affiliation(s)
- Xiang-Hong Li
- Division of Reproductive Endocrinology and Urogynecology, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9032, USA
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12
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Koudou BG, Tano Y, Doumbia M, Nsanzabana C, Cissé G, Girardin O, Dao D, N'Goran EK, Vounatsou P, Bordmann G, Keiser J, Tanner M, Utzinger J. Malaria transmission dynamics in central Côte d'Ivoire: the influence of changing patterns of irrigated rice agriculture. Med Vet Entomol 2005; 19:27-37. [PMID: 15752174 DOI: 10.1111/j.0269-283x.2005.00530.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The dynamics of malaria transmission was studied comparatively in the villages of Zatta and Tiemelekro, central Cote d'Ivoire, from February 2002 to August 2003. Prominent agroecosystems in these villages are irrigated rice growing and vegetable farming, respectively. Mosquitoes (Diptera: Culicidae) were collected on human bait at night and by pyrethrum knock-down spray sheet collections at four randomly selected sentinel sites in each village. In 2002, for a total of 96 man-nights per village, 7716 mosquitoes were collected in Zatta and 3308 in Tiemelekro. In 2003, with half the sampling effort, 859 and 2056 mosquitoes were collected in Zatta and Tiemelekro, respectively. Anopheles gambiae Giles s.l. was the predominant mosquito and the key malaria vector throughout, followed by An. funestus Giles. Anthropophily among adult female Anopheles exceeded 95% in both villages. Comparison between years revealed that the biting rate of An. gambiae s.l. in Zatta decreased several-fold from 49.3 bites per person per night (b/p/n) in 2002 to 7.9 b/p/n in 2003 (likelihood ratio test (LRT) = 1072.66; P < 0.001). Although the biting rate remained fairly constant in Tiemelekro, the difference between years was significant (16.1 vs. 18.2 b/p/n; LRT = 148.06; P < 0.001). These observations were paralleled by a marked decrease in the infective rate of An. gambiae s.l. in Zatta (4.6-1.2%), and an increase in Tiemelekro (3.1-7.6%). Meanwhile, the entomological inoculation rate of An. gambiae s.l. decreased 21-fold in Zatta, from 789 to 38 infective bites per person per year (ib/p/y), whereas it remained high in Tiemelekro (233 vs. 342 ib/p/y). The interruption of irrigated rice growing in Zatta in 2003, consequential to a farmers' conflict over land, might be the underlying cause for the significant reduction in malaria transmission, whereas more stable conditions occurred in Tiemelekro.
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Affiliation(s)
- B G Koudou
- Centre Suisse de Recherches Scientifiques, Abidjan, Côte d'Ivoire, Switzerland
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Abstract
Gonadotropin-releasing hormone (GnRH), which is essential for reproductive function, is made by neurones that migrate from the nasal region into the brain during early embryonic development. This migration begins in chick when the olfactory pit is formed. This is approximately the time that GnRH neurones can be detected immunocytochemically. The present study investigated (i). how early in development the GnRH gene is expressed and (ii). the sites of its expression. Accordingly, reverse transcriptase-polymerase chain reaction (PCR) and in situ hybridization were performed on chick embryos before gastrulation up until the stage by which GnRH neurones have begun to migrate into the central nervous system. Primers were made to the 5'- and 3'-UTR region of the message for cGnRH-I, the form of the peptide that is essential for reproductive function in the chicken. PCR product was found in all stages and the sequences of products from all stages were identical. Thus, the GnRH gene is expressed continuously throughout embryonic development. In situ hybridization with a digoxygenin labelled riboprobe revealed staining along the primitive streak immediately before gastrulation. In later stages, cGnRH-I gene expression was seen in association with the anterior neural ridge. The expression was subsequently restricted to a narrow, clearly defined region, which is associated with the presumptive nasal cavity and olfactory placode. Later, GnRH neurones could be seen in their migratory routes by both in situ hybridization and immunocytochemistry. Expression of the GnRH gene has been described in preimplantation stages in mammals and there is evidence that the neuropeptide plays a role in formation and maintenance of the placenta. What role (if any) it may play in early avian development remains unknown. The demonstration of sites of GnRH expression during the early period of neurulation suggests that GnRH neurones arise before olfactory placode formation.
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Affiliation(s)
- J W Witkin
- Department of Anatomy and Cell Biology, Columbia University College of Physicians, New York, NY 10032, USA.
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14
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Dao D, Walsh CP, Yuan L, Gorelov D, Feng L, Hensle T, Nisen P, Yamashiro DJ, Bestor TH, Tycko B. Multipoint analysis of human chromosome 11p15/mouse distal chromosome 7: inclusion of H19/IGF2 in the minimal WT2 region, gene specificity of H19 silencing in Wilms' tumorigenesis and methylation hyper-dependence of H19 imprinting. Hum Mol Genet 1999; 8:1337-52. [PMID: 10369881 DOI: 10.1093/hmg/8.7.1337] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [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: 12/31/2022] Open
Abstract
WT2 is defined by maternal-specific loss of heterozygosity (LOH) on chromosome 11p15.5 in Wilms' tumors (WTs). The imprinted H19 gene, in this region, is silenced and hypermethylated in most WTs, and this is linked to pathological biallelic expression of IGF2. However, H19 and IGF2 lie within a larger imprinted domain, and the gene specificity of H19 epimutation has been a persistent question. To address this, we assessed LOH, gene expression and DNA methylation at multiple sites in and around the imprinted domain. LOH mapping showed that the entire domain, including IGF2/H19, is within the minimal WT2 region. Genes within the domain, including IPL/TSSC3/BWR1C, IMPT1/ORCTL2/BWR1A/TSSC5, KvLQT1/KCNA9 and TAPA1/CD81, as well as the zinc finger gene ZNF195/ZNFP104 near the centromeric border, were expressed persistently in many WTs. DNA hypermethylation was not detected with 5" upstream probes for IPL, IMPT1, KvLQT1 and ZNF195 in WTs or WT-associated kidneys. Fully developed WTs showed variable hypomethylation at an imprinted CpG island in a KvLQT1 intron, but this was only complete in the cases with LOH and was not observed in pre-neoplastic WT-associated kidneys with H19 epimutation. Analysis of the corresponding region of mouse chromosome 7 using methyltransferase-hypomorphic mice showed that the H19 imprint was fully erased, but that the allelic bias at Ipl, Impt1, p57 Kip2 and, to a lesser extent, Kvlqt1, persisted. Pre-existing massive allelic asymmetry for DNA methylation and hyper-dependence of transcription on methylation status may underlie the mechanism of gene-specific silencing of H19 in Wilms' tumorigenesis.
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Affiliation(s)
- D Dao
- Department of Pathology and Institute for Cancer Genetics, Columbia Univesity College of Physicians and Surgeons, New York, NY 10032, USA
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15
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Dao D, Frank D, Qian N, O'Keefe D, Vosatka RJ, Walsh CP, Tycko B. IMPT1, an imprinted gene similar to polyspecific transporter and multi-drug resistance genes. Hum Mol Genet 1998; 7:597-608. [PMID: 9499412 DOI: 10.1093/hmg/7.4.597] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Human chromosome 11p15.5 and distal mouse chromosome 7 include a megabase-scale chromosomal domain with multiple genes subject to parental imprinting. Here we describe mouse and human versions of a novel imprinted gene, IMPT1 , which lies between IPL and p57 KIP2 and which encodes a predicted multi-membrane-spanning protein similar to bacterial and eukaryotic polyspecific metabolite transporter and multi-drug resistance pumps. Mouse Impt1 and human IMPT1 mRNAs are highly expressed in tissues with metabolite transport functions, including liver, kidney, intestine, extra-embryonic membranes and placenta, and there is strongly preferential expression of the maternal allele in various mouse tissues at fetal stages. In post-natal tissues there is persistent expression, but the allelic bias attenuates. An allelic expression bias is also observed in human fetal and post-natal tissues, but there is significant interindividual variation and rare somatic allele switching. The fact that Impt1 is relatively repressed on the paternal allele, together with data from other imprinted genes, allows a statistical conclusion that the primary effect of human chromosome 11p15.5/mouse distal chromosome 7 imprinting is domain-wide relative repression of genes on the paternal homolog. Dosage regulation of the metabolite transporter gene(s) by imprinting might regulate placental and fetal growth.
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Affiliation(s)
- D Dao
- Department of Pathology, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
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16
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Qian N, Frank D, O'Keefe D, Dao D, Zhao L, Yuan L, Wang Q, Keating M, Walsh C, Tycko B. The IPL gene on chromosome 11p15.5 is imprinted in humans and mice and is similar to TDAG51, implicated in Fas expression and apoptosis. Hum Mol Genet 1997; 6:2021-9. [PMID: 9328465 DOI: 10.1093/hmg/6.12.2021] [Citation(s) in RCA: 119] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
We searched for novel imprinted genes in a region of human chromosome 11p15.5, which contains several known imprinted genes. Here we describe the cloning and characterization of the IPL ( I mprinted in P lacenta and L iver) gene, which shows tissue-specific expression and functional imprinting, with the maternal allele active and the paternal allele relatively inactive, in many human and mouse tissues. Human IPL is highly expressed in placenta and shows low but detectable expression in fetal and adult liver and lung. Mouse Ipl maps to the region of chromosome 7 which is syntenic with human 11p15.5 and this gene is expressed in placenta and at higher levels in extraembryonic membranes (yolk sac), fetal liver and adult kidney. Mouse and human IPL show sequence similarity to TDAG51 , a gene which was shown to be essential for Fas expression and susceptibility to apoptosis in a T lymphocyte cell line. Like several other imprinted genes, mouse and human IPL genes are small and contain small introns. These data expand the repertoire of known imprinted genes and will be helpful in testing the mechanism of genomic imprinting and the role of imprinted genes in growth regulation.
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Affiliation(s)
- N Qian
- Department of Pathology, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
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17
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O'Keefe D, Dao D, Zhao L, Sanderson R, Warburton D, Weiss L, Anyane-Yeboa K, Tycko B. Coding mutations in p57KIP2 are present in some cases of Beckwith-Wiedemann syndrome but are rare or absent in Wilms tumors. Am J Hum Genet 1997; 61:295-303. [PMID: 9311733 PMCID: PMC1715902 DOI: 10.1086/514854] [Citation(s) in RCA: 104] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The Beckwith-Wiedemann syndrome (BWS) is marked by fetal organ overgrowth and conveys a predisposition to certain childhood tumors, including Wilms tumor (WT). The genetics of BWS have implicated a gene that maps to chromosome 11p15 and is paternally imprinted, and the gene encoding the cyclin-cdk inhibitor p57KIP2 has been a strong candidate. By complete sequencing of the coding exons and intron/exon junctions, we found a maternally transmitted coding mutation in the cdk-inhibitor domain of the KIP2 gene in one of five cases of BWS. The BWS mutation was an in-frame three-amino-acid deletion that significantly reduced but did not fully abrogate growth-suppressive activity in a transfection assay. In contrast, no somatic coding mutations in KIP2 were found in a set of 12 primary WTs enriched for cases that expressed KIP2 mRNA, including cases with and without 11p15.5 loss of heterozygosity. Two other 11p15.5 loci, the linked and oppositely imprinted H19 and IGF2 genes, have been previously implicated in WT pathogenesis, and several of the tumors with persistent KIP2 mRNA expression and absence of KIP2 coding mutations showed full inactivation of H19. These data suggest that KIP2 is a BWS gene but that it is not uniquely equivalent to the 11p15.5 "WT2" tumor-suppressor locus.
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Affiliation(s)
- D O'Keefe
- Department of Pathology, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
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18
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Jiang XY, Trujillo JM, Dao D, Liang JC. Studies of BCR and ABL gene rearrangements in chronic myelogenous leukemia patients by conventional and pulsed-field gel electrophoresis using gel inserts. Cancer Genet Cytogenet 1989; 42:287-94. [PMID: 2676142 DOI: 10.1016/0165-4608(89)90097-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Continual monitoring of the presence of the Philadelphia (Ph) chromosome in patients with chronic myelogenous leukemia (CML) is important for diagnosis as well as evaluation of therapy response of these patients. Because the Ph chromosome has been characterized molecularly to involve a reciprocal translocation between the ABL and BCR genes, there is an increasing interest in the use of molecular probes to detect chromosomal rearrangements in this disease. While rearrangements involving the bcr region of the BCR gene can be detected by conventional gel electrophoresis (CGE), detection of those involving ABL generally requires pulsed-field gel electrophoresis (PFGE). Currently, however, CGE and PFGE require different methods of cell preparation, with isolated DNA used in CGE and gel inserts containing whole cells used in PFGE. In this study, we show that the gel-insert method of DNA preparation can be adapted for use in CGE with slight modification of the gel-running conditions. The advantages of this method are demonstrated by studying both bcr and ABL rearrangements in bone marrow and peripheral blood samples of CML patients. Furthermore, we report a novel finding that chromosomal breakpoints in the ABL gene of CML patients occur predominantly between exons 1b and 1a.
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Affiliation(s)
- X Y Jiang
- Division of Laboratory Medicine, University of Texas, M. D. Anderson Cancer Center, Houston 77030
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