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Sifr Z, Ando T, Semeon W, Rike M, Ashami K. Level of Attrition from Antiretroviral Therapy Among Human Immune Deficiency Virus-Infected Children: The Cases of Sidama Zone, Southern Ethiopia. HIV AIDS (Auckl) 2021; 13:813-822. [PMID: 34413684 PMCID: PMC8370599 DOI: 10.2147/hiv.s317117] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 07/23/2021] [Indexed: 12/01/2022]
Abstract
Background Human immune deficiency virus (HIV) remains one of the leading causes of infectious disease mortality and morbidity in Sub-Saharan Africa. Although remarkable progress has been made in prevention and treatment of HIV, there is a higher rate of loss to follow-up in HIV-infected children than in adults, once they enter care. Objective To determine the incidence and identify predictors of loss to follow-up among HIV-infected children on anti-retroviral treatment in Sidama Zone, Ethiopia. Methods A retrospective cohort study was done among children that were enrolled in ART care in Sidama Zone from September 2014 to August 2018. A total of 143 eligible children were included in this study. A structured checklist was used to extract data from patients’ medical records such as patient intake forms, electronic database, and registers. Data were entered, cleaned, coded, and analyzed by STATA version 12. Cox proportional hazards models were fitted to investigate predictors of loss to follow-up. Results Of the 143 participants, 76 (53.15%) were female children with a median age of 7 years and interquartile range of 4–9. The incidence rate was 5 per 100 person-years and the cumulative incidence 12.59%. The median follow-up time was 2.46 years and the total time at risk was 356.06 person-years. Furthermore, 55.56% and 72.22% of those lost to follow-up were within the first and the second years of follow-up, respectively. In multivariable Cox proportional model, only the TB status of the children was significantly associated with loss to follow-up with hazard ratio 3.348 [1.174831, 9.543494] and p-value of 0.024. Conclusion In this study, TB status of children was the significant determinant of loss to follow-up. However, the overall retention was 87.4% and a substantially higher proportion of loss was observed within the first and second years of follow-up.
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Affiliation(s)
- Zemenu Sifr
- Department of Health Information Technology, Hawassa College of Health Sciences, Hawassa, Ethiopia
| | - Telto Ando
- Department of Health Information Technology, Hawassa College of Health Sciences, Hawassa, Ethiopia
| | - Wosenyeleh Semeon
- Department of Health Information Technology, Hawassa College of Health Sciences, Hawassa, Ethiopia
| | - Muse Rike
- Department of Health Information Technology, Hawassa College of Health Sciences, Hawassa, Ethiopia
| | - Kidist Ashami
- Harvard Graduate School of Arts and Science, Boston, MA, 02138, USA
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Ashami K, Falk AS, Hurd C, Garg S, Cervantes SA, Rawat A, Siemer AB. Droplet and fibril formation of the functional amyloid Orb2. J Biol Chem 2021; 297:100804. [PMID: 34044018 PMCID: PMC8294575 DOI: 10.1016/j.jbc.2021.100804] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/10/2021] [Accepted: 05/18/2021] [Indexed: 01/18/2023] Open
Abstract
The functional amyloid Orb2 belongs to the cytoplasmic polyadenylation element binding (CPEB) protein family and plays an important role in long-term memory formation in Drosophila. The Orb2 domain structure combines RNA recognition motifs with low-complexity sequences similar to many RNA-binding proteins shown to form protein droplets via liquid–liquid phase separation (LLPS) in vivo and in vitro. This similarity suggests that Orb2 might also undergo LLPS. However, cellular Orb2 puncta have very little internal protein mobility, and Orb2 forms fibrils in Drosophila brains that are functionally active indicating that LLPS might not play a role for Orb2. In the present work, we reconcile these two views on Orb2 droplet formation. Using fluorescence microscopy, we show that soluble Orb2 can indeed phase separate into protein droplets. However, fluorescence recovery after photobleaching (FRAP) data shows that these droplets have either no or only an extremely short-lived liquid phase and appear maturated right after formation. Orb2 fragments that lack the C-terminal RNA-binding domain (RBD) form fibrils out of these droplets. Solid-state NMR shows that these fibrils have well-ordered static domains in addition to the Gln/His-rich fibril core. Further, we find that full-length Orb2B, which is by far the major component of Orb2 fibrils in vivo, does not transition into fibrils but remains in the droplet phase. Together, our data suggest that phase separation might play a role in initiating the formation of functional Orb2 fibrils.
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Affiliation(s)
- Kidist Ashami
- Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Alexander S Falk
- Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Connor Hurd
- Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Samridhi Garg
- Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Silvia A Cervantes
- Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Anoop Rawat
- Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Ansgar B Siemer
- Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, California, USA.
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Choi J, Cooper ML, Staser K, Ashami K, Vij KR, Wang B, Marsala L, Niswonger J, Ritchey J, Alahmari B, Achilefu S, Tsunoda I, Schroeder MA, DiPersio JF. Baricitinib-induced blockade of interferon gamma receptor and interleukin-6 receptor for the prevention and treatment of graft-versus-host disease. Leukemia 2018; 32:2483-2494. [PMID: 29691471 PMCID: PMC6168427 DOI: 10.1038/s41375-018-0123-z] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 02/26/2018] [Accepted: 03/15/2018] [Indexed: 02/08/2023]
Abstract
The therapeutic benefits of allogeneic hematopoietic stem cell transplantation (allo-HSCT) are derived from the graft-versus-leukemia (GvL) effects of the procedure. There is a strong association between the GvL effects and graft-versus-host disease (GvHD), a major life-threatening complication of allo-HSCT. The limiting of GvHD while maintaining the GvL effect remains the goal of allo-HSCT. Therefore, identifying optimal therapeutic targets to selectively suppress GvHD while maintaining the GvL effects represents a significant unmet medical need. We demonstrate that the dual inhibition of interferon gamma receptor (IFNγR) and interleukin-6 receptor (IL6R) results in near-complete elimination of GvHD in a fully major histocompatibility complex-mismatched allo-HSCT model. Furthermore, baricitinib (an inhibitor of Janus kinases 1 and 2 (JAK1/JAK2) downstream of IFNγR/IL6R) completely prevented GvHD; expanded regulatory T cells by preserving JAK3-STAT5 signaling; downregulated CXCR3 and helper T cells 1 and 2 while preserving allogeneic antigen-presenting cell-stimulated T-cell proliferation; and suppressed the expression of major histocompatibility complex II (I-Ad), CD80/86, and PD-L1 on host antigen-presenting cells. Baricitinib also reversed established GvHD with 100% survival, thus demonstrating both preventive and therapeutic roles for this compound. Remarkably, baricitinib enhanced the GvL effects, possibly by downregulating tumor PD-L1 expression.
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Affiliation(s)
- Jaebok Choi
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA.
| | - Matthew L Cooper
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Karl Staser
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Medicine, Division of Dermatology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Kidist Ashami
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Kiran R Vij
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Bing Wang
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Lynne Marsala
- Department of Radiology, Molecular Imaging Center, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Jessica Niswonger
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Julie Ritchey
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Bader Alahmari
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Samuel Achilefu
- Department of Radiology, Molecular Imaging Center, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, 589-8511, Japan
| | - Mark A Schroeder
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - John F DiPersio
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA.
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Schroeder MA, Ashami K, Staser K. Modeling Chronic Graft Versus Host Disease in Mice Using Allogeneic Bone Marrow and Splenocyte Transfer. ACTA ACUST UNITED AC 2018; 83:e47. [PMID: 30204297 DOI: 10.1002/cpph.47] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
This unit describes a method for allogeneic bone marrow and splenocyte transfer for the modeling of chronic graft versus host disease (cGVHD) in mice. Preclinical models provide clinically relevant platforms for mechanistic and therapeutic studies that may inform the treatment of patients suffering from cGVHD, a common and potentially severe complication of allogeneic hematopoietic stem cell transplantation (alloHSCT). Most murine models of cGVHD depend on the transfer of major histocompatibility complex (MHC)-mismatched bone marrow and whole splenocytes (or purified T cells) into an irradiated recipient. The bone marrow contains hematopoietic stem and progenitor cells necessary to reconstitute the irradiated host hematopoietic system, while splenocytes contain T cells that mediate cGVHD. Of note, specific mouse strains, splenocyte dose, bone marrow quantity, and irradiation doses vary widely across different cGVHD models. Here we describe donor bone marrow and splenocyte preparation, recipient irradiation and intravenous injection of donor cells, and clinical monitoring for disease emergence and progression. © 2018 by John Wiley & Sons, Inc.
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Affiliation(s)
- Mark A Schroeder
- Division of Oncology, Washington University in St. Louis, St. Louis, Missouri
| | - Kidist Ashami
- Division of Oncology, Washington University in St. Louis, St. Louis, Missouri
| | - Karl Staser
- Division of Dermatology, Washington University in St. Louis, St. Louis, Missouri
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Staser K, Cooper M, Choi J, Chukka A, Ashami K, Harrill K, Li S, Cashen A, Musiek A, DiPersio J. 441 Sézary syndrome patient-derived xenografts for 21-color flow cytometry immunophenotyping and CART cell therapeutic testing. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.448] [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: 11/16/2022]
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Rosen R, Abe H, Adejumo O, Ashami K, Ballou L, Montgomery K, Toe S. Cotylaspis insignis (Trematoda: Aspidogastridae): Effect of Osmolality on Adult Worm Survival and Egg Production. COMP PARASITOL 2016. [DOI: 10.1654/1525-2647-83.1.102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ronald Rosen
- Biology Program, Berea College, Berea, Kentucky, 40404, U.S.A. (e-mail: , , , , , , and )
| | - Hanna Abe
- Biology Program, Berea College, Berea, Kentucky, 40404, U.S.A. (e-mail: , , , , , , and )
| | - Olamide Adejumo
- Biology Program, Berea College, Berea, Kentucky, 40404, U.S.A. (e-mail: , , , , , , and )
| | - Kidist Ashami
- Biology Program, Berea College, Berea, Kentucky, 40404, U.S.A. (e-mail: , , , , , , and )
| | - Lauren Ballou
- Biology Program, Berea College, Berea, Kentucky, 40404, U.S.A. (e-mail: , , , , , , and )
| | - Kevin Montgomery
- Biology Program, Berea College, Berea, Kentucky, 40404, U.S.A. (e-mail: , , , , , , and )
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Rosen R, Berg E, Peng L, Abe H, Adejumo O, Ashami K, Ballou L, Montgomery K, Toe S, Reasoner K. Location and Development of the Cotylocidium Within the Egg ofCotylaspis insignis(Trematoda: Aspidogastridae). COMP PARASITOL 2016. [DOI: 10.1654/1525-2647-83.1.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ronald Rosen
- Biology Program, Berea College, Berea, Kentucky 40404, U.S.A. (e-mail: )
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Rosen R, Abe H, Adejumo O, Ashami K, Ballou L, Montgomery K, Toe S, Berg E, Peng L. Mean Intensity and Prevalence ofCotylaspis insignis(Trematoda: Aspidogastridae) Infections in the Fat Mucket,Lampsilis radiata luteola(Bivalvia: Unionidae), from North Elkhorn Creek, a Tributary of the Kentucky River in Central Kentucky, U.S.A. COMP PARASITOL 2016. [DOI: 10.1654/1525-2647-83.1.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ronald Rosen
- Biology Program, Berea College, Berea, Kentucky 40404, U.S.A. (e-mail, and )
| | - Hanna Abe
- Biology Program, Berea College, Berea, Kentucky 40404, U.S.A. (e-mail, and )
| | - Olamide Adejumo
- Biology Program, Berea College, Berea, Kentucky 40404, U.S.A. (e-mail, and )
| | - Kidist Ashami
- Biology Program, Berea College, Berea, Kentucky 40404, U.S.A. (e-mail, and )
| | - Lauren Ballou
- Biology Program, Berea College, Berea, Kentucky 40404, U.S.A. (e-mail, and )
| | - Kevin Montgomery
- Biology Program, Berea College, Berea, Kentucky 40404, U.S.A. (e-mail, and )
| | - Sophia Toe
- Biology Program, Berea College, Berea, Kentucky 40404, U.S.A. (e-mail, and )
| | - Ericka Berg
- Biology Program, Berea College, Berea, Kentucky 40404, U.S.A. (e-mail, and )
| | - Lin Peng
- Biology Program, Berea College, Berea, Kentucky 40404, U.S.A. (e-mail, and )
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