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Nasr S, Khsiba A, Hamzaoui L, Mahmoudi M, Ben-Mohamed A, Yaakoubi M, Medhioub M, Azzouz M. Clinical features and bleeding risk factors of angiodysplasia lesions in a Tunisian population. Rev Gastroenterol Mex (Engl Ed) 2024; 89:31-41. [PMID: 36931959 DOI: 10.1016/j.rgmxen.2023.03.002] [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] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 07/04/2022] [Indexed: 03/17/2023]
Abstract
INTRODUCTION Gastrointestinal angiodysplasia (GIAD) is the most common vascular anomaly in the gastrointestinal (GI) tract, yet little is known about the factors favoring their bleeding. Our study aim was to determine the characteristics of patients with GIAD lesions in a Tunisian population and identify the risk factors of bleeding. PATIENTS AND METHODS A retrospective study was carried out from January 2010 to February 2020 at a tertiary care medical center in Tunisia. Clinical and endoscopic data were collected from each patient's medical reports. We divided the patients into two groups: group A, patients with symptomatic GIAD; and group B, patients with incidental lesions. Group A was subsequently divided into two subgroups, according to the presence or absence of recurrent bleeding. The groups were compared by clinical, laboratory, and endoscopic features. RESULTS GIAD was diagnosed in 114 patients, with a mean age of 70 ± 13.3 years. GIAD lesions were mainly located in the colon (n = 72, 63%). Fifty-four patients (47%) presented with GIAD-related bleeding. The bleeding diagnosis was made during endoscopic procedures by visualizing active bleeding and the stigmata of recent hemorrhage in 10 (18.5%) and 12 (22.2%) cases, respectively. Most of the patients were treated by argon plasma coagulation (93%). Predictive factors of bleeding were age > 75 years, number of lesions >10, chronic kidney disease, diabetes mellitus, and coronary artery disease (p: 0.008; 0.002; 0.016; 0.048; and 0.039, respectively). CONCLUSION Knowledge of the predictive factors of bleeding aids endoscopists in the decision-making process in cases of angiodysplasia.
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Affiliation(s)
- S Nasr
- Departamento de Gastroenterología y Hepatología, Hospital Mohamed Tahar Maamouri, Facultad de Medicina, Universidad El Manar, Tunis, Tunisia.
| | - A Khsiba
- Departamento de Gastroenterología y Hepatología, Hospital Mohamed Tahar Maamouri, Facultad de Medicina, Universidad El Manar, Tunis, Tunisia
| | - L Hamzaoui
- Departamento de Gastroenterología y Hepatología, Hospital Mohamed Tahar Maamouri, Facultad de Medicina, Universidad El Manar, Tunis, Tunisia
| | - M Mahmoudi
- Departamento de Gastroenterología y Hepatología, Hospital Mohamed Tahar Maamouri, Facultad de Medicina, Universidad El Manar, Tunis, Tunisia
| | - A Ben-Mohamed
- Departamento de Gastroenterología y Hepatología, Hospital Mohamed Tahar Maamouri, Facultad de Medicina, Universidad El Manar, Tunis, Tunisia
| | - M Yaakoubi
- Departamento de Gastroenterología y Hepatología, Hospital Mohamed Tahar Maamouri, Facultad de Medicina, Universidad El Manar, Tunis, Tunisia
| | - M Medhioub
- Departamento de Gastroenterología y Hepatología, Hospital Mohamed Tahar Maamouri, Facultad de Medicina, Universidad El Manar, Tunis, Tunisia
| | - M Azzouz
- Departamento de Gastroenterología y Hepatología, Hospital Mohamed Tahar Maamouri, Facultad de Medicina, Universidad El Manar, Tunis, Tunisia
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Aslam H, Ahmed K, Iskander PA, Aloysius MM, Khurana V, Nasr S, Amjad MA. A Case of Mirtazapine-Induced Pancreatitis. Cureus 2023; 15:e37129. [PMID: 37153315 PMCID: PMC10159629 DOI: 10.7759/cureus.37129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/04/2023] [Indexed: 04/07/2023] Open
Abstract
Acute pancreatitis is a concerning cause of hospitalization in the United States, with the most common etiologies being secondary to alcohol abuse and gallstones. Rarely, medications can trigger this inflammatory response, whether via direct toxic effects or other metabolic derangements. Mirtazapine is an antidepressant that has been associated with elevations in triglyceride levels on initiation. Relatedly, high triglyceride levels and autoimmune disorders are other causes of pancreatitis exacerbations. Here, we present the case of a female who was started on mirtazapine therapy and found to have elevated triglyceride levels. The course was complicated by acute pancreatitis requiring plasmapheresis, despite medication discontinuation, to which she responded well.
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Bhattaru A, Blanchard I, Kunamneni S, Rojulpote C, Iskander P, Nasr S, Klamp D. Acrophialophora: A Comprehensive Review of Clinical Guidelines and Diagnosis. Cureus 2023; 15:e37614. [PMID: 37197132 PMCID: PMC10184873 DOI: 10.7759/cureus.37614] [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] [Accepted: 04/15/2023] [Indexed: 05/19/2023] Open
Abstract
Acrophialophora is a saprotrophic genus of fungi found in both temperate and tropical regions. The genus is comprised of 16 species, with the subspecies A. fusispora and A. levis necessitating the most clinical concern. Acrophialophora is an opportunistic pathogen with a broad range of clinical manifestations; the fungus has been implicated in cases of fungal keratitis, lung infection, and brain abscess. Acrophialophora infection is particularly of concern for immunocompromised patients, who often present with a more severe disease course involving disseminated infection and may not exhibit typical symptoms. Early diagnosis and therapeutic intervention are critical to the successful clinical management of Acrophialophora infection. Guidelines for antifungal treatment have yet to be established, partially due to the lack of documented cases. Aggressive use of antifungal agents and long-term treatment is required, especially in immunocompromised patients and patients with systemic involvement, due to the potential for morbidity and mortality. In addition to outlining the rarity and epidemiology of the disease, this review provides an overview of the diagnosis and clinical management of Acrophialophora infection to facilitate an early diagnosis and appropriate interventions.
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Affiliation(s)
- Abhijit Bhattaru
- Radiology, University of Pennsylvania, Philadelphia, USA
- Medicine, Rutgers University New Jersey Medical School, Newark, USA
| | | | | | - Chaitanya Rojulpote
- Internal Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
- Nuclear Cardiology and Cardiovascular Molecular Imaging, University of Pennsylvania, Philadelphia, USA
| | - Peter Iskander
- Internal Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
| | - Simin Nasr
- Family Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
| | - Douglas Klamp
- Department of Internal Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
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Iskander PA, Zaidi SMH, Zheng J, Iskander A, Aloysius MM, Khurana V, Nasr S. To Bleed or Not to Bleed. Cureus 2023; 15:e37591. [PMID: 37193446 PMCID: PMC10183236 DOI: 10.7759/cureus.37591] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/14/2023] [Indexed: 05/18/2023] Open
Abstract
The location of gastrointestinal (GI) bleeding can be characterized based on the characteristics of the bowel movements these patients present with. Bright red blood per rectum is usually associated with a lower bleed; if brisk and significant enough, however, upper bleeds can present similarly. Melenic or "tar-colored" bowel movements are more likely to occur from upper bleeds as the color is secondary to digestion of hemoglobin as it passes through the GI tract. At times, there can be a mix of the two which can make a clinical decision for intervention less obvious. To make matters more difficult, some of these patients can be on anticoagulation therapy for a myriad of reasons. Risks versus benefits at these times need to be weighed as holding this therapy may make the patients more prone to clotting while continuation would increase likelihood of bleeding. We present a case of a hypercoagulable patient who was started on rivaroxaban for history of pulmonary embolism; this led to the onset of an acute GI bleed from a duodenal diverticulum requiring endoscopic intervention. Although this can be a known effect of the therapy, the severity of bleed and changes in hemodynamics can warrant very different management strategies.
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Affiliation(s)
- Peter A Iskander
- Internal Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
| | | | - Jiayi Zheng
- Internal Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
| | - Anthony Iskander
- Internal Medicine, Xavier University School of Medicine, Oranjestad, ABW
| | - Mark M Aloysius
- Internal Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
| | - Vikas Khurana
- Gastroenterology, The Wright Center for Graduate Medical Education, Scranton, USA
| | - Simin Nasr
- Family Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
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Syed OZ, Ahmed K, Algohiny A, Mohammed E, Iskander PA, Klamp D, Nasr S. A Rare Case of Hypothyroidism-Induced Rhabdomyolysis. Cureus 2023; 15:e37211. [PMID: 37159771 PMCID: PMC10163917 DOI: 10.7759/cureus.37211] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/06/2023] [Indexed: 05/11/2023] Open
Abstract
Rhabdomyolysis is a condition caused by muscle breakdown. It can be usually associated with pain, weakness, and elevated creatinine kinase levels on laboratory testing. There are various triggers, some of which can include trauma, dehydration, infections, and, as in this case, autoimmune disorders. Here, we present a case of a patient with worsening muscle pain who was found to have elevated creatinine kinase levels and undiagnosed hypothyroidism, with symptoms improving with intravenous hydration and thyroid supplementation.
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Affiliation(s)
- Omar Z Syed
- Internal Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
| | - Khalid Ahmed
- Internal Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
| | - Ahmed Algohiny
- Internal Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
| | - Elmkdad Mohammed
- Internal Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
| | - Peter A Iskander
- Internal Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
| | - Douglas Klamp
- Internal Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
| | - Simin Nasr
- Family Medicine, The Wright Center for Graduate Medical Education, Scranton, USA
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Pappoppula L, Zaidi SMH, Iskander PA, Iskander A, Saeed B, Elawad A, Aloysius MM, Khurana V, Nasr S, Ahmed K. A Rare Manifestation of Hepatitis A Associated Cryoglobulinemia. Cureus 2023; 15:e36948. [PMID: 37139266 PMCID: PMC10151109 DOI: 10.7759/cureus.36948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/31/2023] [Indexed: 04/03/2023] Open
Abstract
Cryoglobulins can precipitate in the blood when exposed to lower temperatures. These abnormal immunoglobulins are more commonly affiliated with Hepatitis C infection but there have been cases reported with Hepatitis A association for which we present this case. The patient was treated with steroids which did show gradual improvement of symptoms but, ultimately, the patient developed renal failure and required temporary hemodialysis. Care should be taken to assess patients with cryoglobulins for other viral serologies besides Hepatitis C.
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Nasr S, Khsiba A, Hamzaoui L, Mahmoudi M, Ben-Mohamed A, Yaakoubi M, Medhioub M, Azzouz M. Características clínicas y factores de riesgo de sangrado en lesiones de angiodisplasia en una población tunecina. Revista de Gastroenterología de México 2023. [DOI: 10.1016/j.rgmx.2022.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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8
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Kennedy B, Bex P, Hunter DG, Nasr S. Two fine-scale channels for encoding motion and stereopsis within the human magnocellular stream. Prog Neurobiol 2023; 220:102374. [PMID: 36403864 PMCID: PMC9832588 DOI: 10.1016/j.pneurobio.2022.102374] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [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: 04/20/2022] [Revised: 10/16/2022] [Accepted: 11/15/2022] [Indexed: 11/18/2022]
Abstract
In humans and non-human primates (NHPs), motion and stereopsis are processed within fine-scale cortical sites, including V2 thick stripes and their extensions into areas V3 and V3A that are believed to be under the influence of magnocellular stream. However, in both species, the relative functional organization (overlapping vs. none overlapping) of these sites remains unclear. Using high-resolution functional MRI (fMRI), we found evidence for two minimally-overlapping channels within human extrastriate areas that contribute to processing motion and stereopsis. Across multiple experiments that included different stimuli (random dots, gratings, and natural scenes), the functional selectivity of these channels for motion vs. stereopsis remained consistent. Furthermore, an analysis of resting-state functional connectivity revealed stronger functional connectivity within the two channels rather than between them. This finding provides a new perspective toward the mesoscale organization of the magnocellular stream within the human extrastriate visual cortex, beyond our previous understanding based on animal models.
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Affiliation(s)
- B Kennedy
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States
| | - P Bex
- Department of Psychology, Northeastern University, Boston, MA, United States
| | - D G Hunter
- Department of Ophthalmology, Harvard Medical School, Boston, MA, United States; Department of Ophthalmology, Boston's Children Hospital, Boston, MA, United States
| | - S Nasr
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States; Department of Radiology, Harvard Medical School, Boston, MA, United States.
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9
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Nasr S, Fouda E, Amer O, Tamer D, Mohamed M. 369 Cystic fibrosis global work: Progress of collaboration between University of Michigan and four universities in Egypt. J Cyst Fibros 2022. [DOI: 10.1016/s1569-1993(22)01059-1] [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: 11/07/2022]
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10
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Ren C, Slaven J, Nasr S, McBennett K, Flask C. 116 Associations between lung T1 magnetic resonance imaging, chest computed tomography, and multiple-breath washout in young children with mild cystic fibrosis lung disease. J Cyst Fibros 2022. [DOI: 10.1016/s1569-1993(22)00807-4] [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: 11/05/2022]
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11
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Iwanicki C, Andrews H, Fogarty-Brown S, Enochs C, Bouma S, Nasr S. 374 Optimizing screening for food insecurity in a pediatric cystic fibrosis center. J Cyst Fibros 2022. [DOI: 10.1016/s1569-1993(22)01064-5] [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: 11/07/2022]
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12
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Said N, Lee J, Dhadphale E, Lee J, Nasr S. 3 Cystic fibrosis–related diabetes—adherence to screening at a large clinical center. J Cyst Fibros 2022. [DOI: 10.1016/s1569-1993(22)00694-4] [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: 11/06/2022]
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13
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Rahmani B, Alimadadi N, Attaran B, Nasr S. Yeasts from Iranian traditional milk kefir samples: isolation, molecular identification and their potential probiotic properties. Lett Appl Microbiol 2022; 75:1264-1274. [PMID: 35879830 DOI: 10.1111/lam.13794] [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: 03/09/2022] [Revised: 07/20/2022] [Accepted: 07/20/2022] [Indexed: 11/28/2022]
Abstract
Milk kefir is a fermented dairy product with numerous attributed health benefits due to the presence of a complex eukaryotic and prokaryotic microbiota. In this study, a total number of 26 yeast isolates were obtained from eight kefir samples from three different cities of Iran. The isolates belonged to Kluyveromyces marxianus, Saccharomyces cerevisiae, Pichia fermentans and P. kudriavzevii. The potential probiotic characteristics of the isolates were evaluated based on their ability to tolerate the stimulated condition of the gastrointestinal tract. In addition, hemolytic activity, adherence to different solvents, auto-aggregation, adhesion to the epithelial intestine-derived cells and antimicrobial activity of the selected isolates were evaluated. Overall, four yeast strains (three strains of S. cerevisiae and one strain of P. fermentans) showed resistance and survival ability against the gastrointestinal physiological conditions including acidic pH, presence of bile salt and digestive enzymes. They were able to grow at 37 °C and had the capacity to adhere to epithelial intestine-derived cells. These results suggest that the selected strains can be proper candidates as probiotic yeast strains for the development of novel functional foods.
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Affiliation(s)
- B Rahmani
- Department of Microbial Biotechnology, Faculty of Basic Sciences and Advanced Technologies in Biology, University of Science and Culture, Tehran, Iran
| | - N Alimadadi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - B Attaran
- Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran
| | - S Nasr
- Department of Microbial Biotechnology, Faculty of Basic Sciences and Advanced Technologies in Biology, University of Science and Culture, Tehran, Iran.,Microorganisms Bank, Iranian Biological Resource Center (IBRC), ACECR, Tehran, Iran
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Bradai S, Khsiba A, Nasr S, Mahmoudi M, Ben Mohamed A, Medhioub M, Hamzaoui M, Azzouz M. La tuberculose péritonéale et iléo-caecale : à propos de 140 cas. Rev Med Interne 2021. [DOI: 10.1016/j.revmed.2021.10.178] [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: 10/19/2022]
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Bradai S, Khsiba A, Nasr S, Mahmoudi M, Ben Mohamed A, Medhioub M, Hamzaoui M, Azzouz M. Profil épidémio-clinique et évolutif des hépatopathies auto-immunes. Rev Med Interne 2021. [DOI: 10.1016/j.revmed.2021.10.021] [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: 11/26/2022]
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Nasr S, Gökdemir Y, Eralp EE, Karakoc F, Ergenekon P, Tapley C, Dagher S, Bouma S, Cosşkun ÖK, Kocamaz D, Karakoc F. 83: CF Global Care: Continuation of the collaboration between 2 CF centers; University of Michigan, USA, and Marmara University, Istanbul, Turkey, in the COVID-19 pandemic. J Cyst Fibros 2021. [PMCID: PMC8518439 DOI: 10.1016/s1569-1993(21)01508-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Enochs C, Moraniec H, Lehrmann J, Nasr S. 231: Transition from pediatric to adult cystic fibrosis care: Adapting and maintaining using telemedicine. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01656-8] [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: 10/20/2022]
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Shakkottai A, Irani S, Nasr S, O’Brien L, Chervin R. 171: Obstructive sleep apnea in people with cystic fibrosis: Potential risk factors. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01596-4] [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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Gökdemir Y, Eralp EE, Ergenekon P, Yegit CY, Mursaloglu H, Uzunoglu B, Kocamaz D, Taştan G, Filbrun A, Enochs C, Bouma S, Iwanicki C, Karakoc F, Nasr S, Karadag B. 108: Change in FEV1 after implementation of standardized CF care algorithm: A quality improvement project. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01533-2] [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: 11/15/2022]
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Adair D, Hider A, Tapley C, Filbrun A, Bouma S, Iwanicki C, Nasr S. 121: Assessing the utility of an outpatient exercise program for patients with CF: A quality improvement project. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01546-0] [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: 10/20/2022]
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Chalumeau C, Pierga JY, Pierron G, Ballet S, Nasr S, Vincent-Salomon A, Vuagnat P, Bellesoeur A, Carton M, Bidard F, Lerebours F. 113P Efficacy of oral etoposide associated with trastuzumab in HER2-positive metastatic breast cancer: Results from the Institut Curie’s database. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.03.127] [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: 10/21/2022] Open
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Cenk M, Ergenekon A, Yilmaz Yegit C, Guliyeva A, Kalyoncuoglu M, Gokdemir Y, Erdem Eralp E, Mursaloglu H, Uzunoglu B, Tastan G, Filbrun A, Enochs C, Karakoc F, Nasr S, Karadag B. P098 Change in FEV1 after standardised care algorithm for cystic fibrosis patients: quality improvement project. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01124-3] [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: 10/21/2022]
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Ben Ameur W, Nasr S, Hammami A, Jaziri H, Ben Slam A, Ksiaa M, Jmaa A. Intérêt du dépistage systématique des dysthyroïdies au cours de la maladie cœliaque. Rev Med Interne 2020. [DOI: 10.1016/j.revmed.2020.10.351] [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: 11/24/2022]
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Nasr S, Mensi A, Ayadi R, Said Y, Dabbeche R. La maladie cœliaque : une cause inhabituelle d’hypertension portale. Rev Med Interne 2020. [DOI: 10.1016/j.revmed.2020.10.162] [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: 10/22/2022]
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Nasr S, Jaziri H, Dahman W, Ben Ameur W, Hammami A, Nour E, Ksiaa M, Jmaa A. L’atteinte du foie au cours de la maladie cœliaque : quelle fréquence et quelle évolution ? Rev Med Interne 2020. [DOI: 10.1016/j.revmed.2020.10.169] [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: 10/22/2022]
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Nasr S, Filbrun A, Enochs C, Caverly L, Stiffler J, Vess T, Rajala K, Lehrmann J, Iwanicki C, Bouma S, Tales K, Tapley C, Fenner B. P191 Quality improvement project to improve pulmonary function in paediatric cystic fibrosis patients. J Cyst Fibros 2019. [DOI: 10.1016/s1569-1993(19)30485-0] [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: 10/26/2022]
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Shapiro AD, Mitchell IS, Nasr S. The future of bypassing agents for hemophilia with inhibitors in the era of novel agents. J Thromb Haemost 2018; 16:2362-2374. [PMID: 30264916 DOI: 10.1111/jth.14296] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [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: 06/12/2018] [Indexed: 01/19/2023]
Abstract
Bypassing agents are presently the standard of care for the treatment of bleeding episodes in patients with hemophilia and high-titer inhibitors and are also used for bleed prevention. Only two bypassing agents are available to patients, and these products trace their lineage to the 1970s (activated prothrombin complex concentrates) and the 1980s (recombinant factor VIIa). Given the limited repertoire of available products, clinicians have relied on experience, empirical observation, registry data and individualized care to improve clinical outcomes on a case-by-case basis. Research over the past two decades has culminated in a greatly improved understanding of human coagulation; resulting from this, new products have been developed that offer treatment options and mechanisms of actions that differ from current bypassing agents. The most advanced in clinical development is emicizumab, a bispecific antibody that mimics the function of FVIIIa in the intrinsic Xase complex and is indicated for once-weekly or every-other-week prophylactic dosing in inhibitor patients. Other non-traditional products in clinical development include fitusiran and antibodies directed against tissue factor pathway inhibitor. As non-factor-based therapies become more widely utilized over time, the use of bypassing agents may be expected to decrease; however, bypassing agents will remain essential for the foreseeable future. As such, clinical development of bypassing agents continues, with some products (e.g. eptacog beta) under regulatory review. In this review we examine the optimal use of bypassing agents and their mechanism of action. We also discuss newer products and how these might theoretically be administered in conjunction with traditional bypassing agents.
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Affiliation(s)
- A D Shapiro
- Indiana Hemophilia and Thrombosis Center, Inc., Indianapolis, IN, USA
| | | | - S Nasr
- GLOVAL, LLC, Broomfield, CO, USA
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Gabr H, Shams Eldeen A, Abo Elkheir W, Hammad A, Nasr S, Abdelfadel Awd M, Ibrahim O. Placental extract promotes healing of chronic non-healing diabetic ulcers. Cytotherapy 2018. [DOI: 10.1016/j.jcyt.2018.02.060] [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: 10/17/2022]
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Elmaadawi A, Mashaly S, Nasr S. Left unilateral ultrabrief ECT in a patient with Cerebral Aneurysms and right side stoke. Brain Stimul 2017. [DOI: 10.1016/j.brs.2017.01.518] [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: 11/24/2022] Open
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Khoshmanesh B, Nasr S. The impact of urban transportation on air pollution and the role of subway inits control (Tehran, Beijing, Barcelona). J Fundam and Appl Sci 2016. [DOI: 10.4314/jfas.v8i2s.106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Nasr S, El-Shorbagy M, El-Desoky I, Hendawy Z, Mousa A. Hybrid Genetic Algorithm for Constrained Nonlinear Optimization Problems. ACTA ACUST UNITED AC 2015. [DOI: 10.9734/bjmcs/2015/16193] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Yue X, Pourladian I, Nasr S, Tootell R, Ungerleider L. A curvature-processing network in macaque visual cortex. J Vis 2013. [DOI: 10.1167/13.9.128] [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: 11/24/2022] Open
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34
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Nasr S, Tootell R. Contribution of anterior temporal lobe in recognition of face and non-face objects. J Vis 2011. [DOI: 10.1167/11.11.639] [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: 11/24/2022] Open
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Nasr S, Trepo C, Grimaud J, El-Booushara H. Genotyping of HCV-Egyptian infected cases, and response to treatment. J Biotechnol 2010. [DOI: 10.1016/j.jbiotec.2010.09.680] [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: 10/18/2022]
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Nasr S, Trepo C, Grimaud J, El-Boushara H. Genotyping of HCV in Egyptians & response to treatment. J Biotechnol 2010. [DOI: 10.1016/j.jbiotec.2010.09.678] [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: 10/18/2022]
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Boughzala K, Nasr S, Ben Salem E, Kooli F, Bouzouita K. Structural and spectroscopic investigation of lanthanum-substituted strontium-oxybritholites. J CHEM SCI 2009. [DOI: 10.1007/s12039-009-0031-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
A structural investigation of liquid N-methylformamide, C(2)H(5)NO, was performed at room temperature and atmospheric pressure using X-ray scattering. Experimental data are analysed to yield the molecular structure factor and the distinct pair correlation function. The more dominant form (cis or trans) is considered and the H-bonding parameters are deduced. In order to describe the local arrangement in the liquid, different models are examined.
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Affiliation(s)
- F Hammami
- Laboratoire Physico-Chimie Structurale, Département de Physique, Faculté des Sciences, Monastir 5019, Tunisia
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Ouslander J, Johnson T, Nasr S, Schnelle J, Miller M. Atrial natriuretic peptide levels in geriatric patients with nocturia and nursing home residents with nighttime incontinence. J Am Geriatr Soc 1999; 47:1439-44. [PMID: 10591239 DOI: 10.1111/j.1532-5415.1999.tb01564.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 11/30/2022]
Abstract
OBJECTIVES To determine if nocturnal polyuria in geriatric patients with nocturia and nocturnal incontinence is associated with elevated plasma atrial natriuretic peptide (ANP) levels. DESIGN Case series. SETTING Four nursing homes and two board and care facilities. PARTICIPANTS Fifty-four nursing home residents and 26 board and care residents with a mean age of 86. MEASUREMENTS Daytime (7:00 a.m. to 7:00 p.m.) and nighttime (7:00 p.m. to 7:00 a.m.) urine volumes of incontinent nursing home residents were measured over 3 days and 3 nights by reweighing preweighed adults diapers and toileting inserts emptied by research staff for the board and care group. Blood was drawn in the early morning (5:00 a.m. to 7:00 a.m.) before subjects arose and in the evening after an hour of lying in bed (8:00 p.m. to 11:00 p.m.), and plasma ANP levels were determined by radioimmunoassay. RESULTS Forty-nine (61%) of the subjects had nocturnal polyuria as defined by night/total urine volume ratios > or = 50%. There was no significant difference between those with night/total ratios > or = 50% versus < 50% in plasma levels of ANP in the early morning (44.2+/-33.3, median 35.7 pg/mL vs 40.9+/-39.2, median 28.5; P = .36 by Mann Whitney U) or in the evening (43.4+/-28.8, median 36.4 pg/mL vs 49.6+/-53.1, median 34.4; P = .58). Nor was there any significant correlation between night/total urine volume ratio and morning or evening ANP levels (r = .01, P = .96 and r = .23, P = .31, respectively). CONCLUSIONS In this sample of geriatric patients with nocturia and nursing home residents with nighttime urinary incontinence, ANP levels were elevated, but increased nighttime urine production was not associated with higher levels. Because of the variability in ANP levels, our power to detect such an association was low, and we cannot draw any definitive conclusions. Although high plasma ANP levels are unlikely to be a primary cause of nocturia and nighttime incontinence, they may, when combined with other factors such as low antidiuretic hormone levels, sleep disorders, and low functional bladder capacity, contribute to these symptoms in some geriatric patients.
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Affiliation(s)
- J Ouslander
- Emory University School of Medicine, Atlanta VA Medical Center, Georgia, USA
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Slight SH, Chilakamarri VK, Nasr S, Dhalla AK, Ramires FJ, Sun Y, Ganjam VK, Weber KT. Inhibition of tissue repair by spironolactone: role of mineralocorticoids in fibrous tissue formation. Mol Cell Biochem 1998; 189:47-54. [PMID: 9879653 DOI: 10.1023/a:1006844010371] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [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: 11/12/2022]
Abstract
Mineralocorticoids have been implicated in promoting fibrous tissue formation in various organs. In the present study, we sought to address the potential contribution of mineralocorticoids to fibrous tissue formation using a skin pouch model which has proved valuable for the analysis of inflammatory and wound healing responses. Skin pouches were induced in rats by administration of a phorbol ester, croton oil (0.5 ml of a 1% solution). After 2 weeks, rats were killed and intact pouch tissue collected. Pouch weights of control and aldosterone-treated (0.75 microg/h via osmotic minipump) rats were similar (3.33 +/- 0.44 g vs. 3.70 +/- 0.28 g respectively). However, pouch weights were reduced by more than 50% in spironolactone-treated (25 mg/day powdered in food) animals (1.62 +/- 0.22 g and 1.27 +/- 0.23 g respectively in aldosterone and spironolactone alone groups). To ascertain the effects of different treatments on collagen accumulation, hydroxyproline concentration was measured. Compared with controls, hydroxyproline concentration was significantly reduced following spironolactone treatment (17.1 +/- 0.08 vs. 7.5 +/- 2.0 microg/mg dry wt, respectively, p < 0.01). This response to spironolactone was negated by coadministration of aldosterone (hydroxyproline concentration was 18.6 +/- 2.1 microg/mg dry wt). Following bilateral adrenalectomy, spironolactone reduced pouch weight and hydroxyproline concentration, which was not the case for adrenalectomy alone. Two week aldosterone administration in uninephrectomized rats on high salt diet was deemed ineffective in modulating pouch development (pouch wet wts were 3.48 +/- 0.4 g vs. 3.00 +/- 0.19 g in controls and aldosterone-treated rats, respectively). Mineralocorticoid receptor expression in pouch tissue was demonstrated by RT/PCR. Furthermore, NADP+-dependent 11beta-hydroxysteroid dehydrogenase 1 (11beta-HSD1) activity was detected in pouch tissue, together with lower levels of NAD+-dependent 11beta-HSD2. Spironolactone (p < 0.05) significantly reduced 11beta-HSD1 activity compared with controls. Thus, fibrous tissue possesses requisite components of MC action, and antagonism of mineralocorticoid receptors by spironolactone attenuates its formation. Pouch formation is under the influence of circulating MC and, we would like to propose, is also mediated through corticosteroids generated de novo at the site of tissue repair.
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Affiliation(s)
- S H Slight
- Department of Internal Medicine, University of Missouri Health Sciences Center, Columbia, USA
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van Eyndhoven WG, Frank D, Kalachikov S, Cleary AM, Hong DI, Cho E, Nasr S, Perez AJ, Mackus WJ, Cayanis E, Wellington S, Fischer SG, Warburton D, Lederman S. A single gene for human TRAF-3 at chromosome 14q32.3 encodes a variety of mRNA species by alternative polyadenylation, mRNA splicing and transcription initiation. Mol Immunol 1998; 35:1189-206. [PMID: 10199393 DOI: 10.1016/s0161-5890(98)00099-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [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: 11/28/2022]
Abstract
Human TRAF-3 is a signaling molecule that interacts with the cytoplasmic tails of CD40 and other TNF-receptor family members. TRAF-3 mRNA is expressed as two major classes of approximately 2 and 8 kb and a number of TRAF-3 encoding cDNA clones differ in discrete gene segments. Because this variety of mRNA species could result from mRNA processing events and/or multiple genes, the structure and localization of TRAF-3 encoding gene elements were determined. FISH and radiation hybrid mapping demonstrated that TRAF-3 is located at chromosome 14q32.3, approximately 1 Mb centromeric to the Ig heavy chain gene complex. Physical mapping of four overlapping genomic PAC clones established that TRAF-3 transcripts are encoded by a single gene, comprised of 13 exons and spanning 130 kb. Alternative polyadenylation in the mRNA segment encoded by exon 12 accounts for the difference between the 2 kb and the 8 kb classes of transcripts. Alternative mRNA splicing in the coding region (encoded by exons 3-12) generates transcripts which delete exons 8 (75 nt), 7+8 (156 nt) or 8+9 (168 nt) and that encode distinct protein isoforms (delta25, delta52 and delta56 aa, respectively). Alternative splicing of exon 2 (139 nt) and alternative transcriptional initiation result in mRNA species with distinct 5'UTRs. Together, these data indicate that a single TRAF-3 gene encodes a variety of mRNA species by a combination of alternative polyadenylation, alternative mRNA splicing and/or alternative initiation.
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Affiliation(s)
- W G van Eyndhoven
- Laboratory of Molecular Immunology, Columbia University, New York, NY 10032, USA
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Abstract
Sequential treatment with all-trans retinoic acid followed by chemotherapy significantly improves the long-term survival of patients who have acute promyelocytic leukemia (APL). Consequently, a simple and accurate test is needed to establish the diagnosis of APL and to identify those patients having a relapse of the disease. We describe an accurate, 2-hour indirect immunofluorescent assay for identifying APL cells in bone marrow specimens. The assay uses the PML (PG-M3) murine monoclonal antibody that is directed against the amino-terminal portion of the PML gene product. We observed a distinctive, finely speckled pattern of fluorescence in the NB4 cell line (a positive control), as well as in 15 clinical specimens that were confirmed to have APL by cytogenetic, cytochemical, and immunophenotypic studies, including four cases of microgranular variant of APL. By contrast, a coarse globular pattern of fluorescence was observed in 53 other clinical specimens that did not contain APL. When we performed dilution studies using artificial mixtures of APL cells with normal bone marrow cells, we detected as few as 5% APL cells in the mixture. Finally, there was complete concordance between the immunofluorescent assay and a polymerase chain reaction-based assay for the PML-retinoic acid receptor alpha chimeric gene in 12 other clinical specimens. We conclude that the immunofluorescent assay for PML protein is a rapid, sensitive, and accurate method for determining the presence of APL cells in clinical specimens. This assay therefore should be considered as a cost-effective alternative to other diagnostic tests, such as karyotyping or polymerase chain reaction, for the diagnostic evaluation of APL.
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Affiliation(s)
- M K Samoszuk
- Quest Diagnostics (formerly Nichols Institute), San Juan Capistrano, California 92690-6130, USA
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Tafas T, Cuckle HS, Nasr S, Krivchenia EL, Resvani E, Evans MI. An automated image analysis method for the measurement of neutrophil alkaline phosphatase in the prenatal screening of Down syndrome. Fetal Diagn Ther 1996; 11:254-9. [PMID: 8823605 DOI: 10.1159/000264311] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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: 02/02/2023]
Abstract
OBJECTIVES (1) To develop an image analysis method for the measurement of neutrophil alkaline phosphatase (NAP); (2) To establish a correlation of urea-resistant fraction of NAP (URNAP)/NAP scoring between the manual and automated methods, and (3) to assess the value of URNAP/NAP in the prenatal screening of Down syndrome. STUDY DESIGN Slides from 15 unaffected controls were blindly scored by both methods. The Pearson test was used for correlation analysis. Slides from 15 Down syndrome pregnancies and 25 unaffected controls were scored manually. RESULTS A coefficient r = 0.93 was obtained comparing the URNAP/NAP scores generated by the two methods. Average time for scoring by the automated method was 8 min. The median URNAP/NAP values for Down syndrome and unaffected controls were 112/86.1 and 51/51.5, respectively. CONCLUSIONS Scores obtained by both methods highly correlate. Automated scoring is threefold faster. Down syndrome cases have higher URNAP/NAP scores compared to unaffected controls, which suggests that URNAP/NAP is an extremely useful marker for mid-trimester prenatal screening.
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Affiliation(s)
- T Tafas
- Department of Biology, University of Athens, Greece
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el-Refaie A, Savage K, Bhattacharya S, Khakoo S, Harrison TJ, el-Batanony M, Nasr S, Mokhtar N, Amer K, Scheuer PJ, Dhillon AP. HCV-associated hepatocellular carcinoma without cirrhosis. J Hepatol 1996; 24:277-85. [PMID: 8778193 DOI: 10.1016/s0168-8278(96)80005-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
BACKGROUND/AIMS Hepatocellular carcinoma is an aggressive malignancy and carries a poor prognosis. Hepatitis B and C virus infection, cirrhosis and aflatoxin B1 exposure are considered major risk factors. The role of hepatitis C virus in the causation of hepatocellular carcinoma has been debated. It is a positive, single-stranded RNA virus without a DNA intermediate in its replicative cycle, so that integration of hepatitis C virus nucleic acid sequences into the host genome seems unlikely. The most plausible explanation of hepatitis C virus-associated hepatocellular carcinoma so far is that the virus causes necroinflammatory hepatic disease with vigorous regeneration, fibrosis, and eventually cirrhosis. The aim of this study was to examine the relationship of hepatitis C, cirrhosis and hepatocellular carcinoma. METHODS Sixty-six consecutive patients with hepatocellular carcinoma undergoing resection or transplantation at the Royal Free Hospital were reviewed. A combination of serological data and polymerase chain reaction assay was used to assign hepatitis C virus and hepatitis B virus infection. RESULTS We found four HCV-RNA positive patients with hepatocellular carcinoma without cirrhosis. All four cases were positive for HCV-RNA and negative for all markers of hepatitis B virus infection. CONCLUSIONS These four cases show that hepatocellular carcinoma may develop in patients with hepatitis C virus without pre-existing cirrhosis. However, the precise role of hepatitis C virus in hepatocarcinogenesis, the carcinogenic potential of the different genotypes and whether this role is influenced by other risk factors still have to be clarified.
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Affiliation(s)
- A el-Refaie
- University Department of Histopathology, Royal Free Hospital and School of Medicine, London, United Kingdom
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Chan WC, Gu LB, Masih A, Nicholson J, Vogler WR, Yu G, Nasr S. Large granular lymphocyte proliferation with the natural killer-cell phenotype. Am J Clin Pathol 1992; 97:353-8. [PMID: 1543158 DOI: 10.1093/ajcp/97.3.353] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.2] [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: 12/27/2022] Open
Abstract
Lymphoproliferated disorders involving large granular lymphocytes (LGL) can be divided into a common T-cell subset (CD3+, CD8+) and a rarer natural killer (NK)-cell subset (CD2+, CD3-). The immunophenotype, clinical pathologic features, and cytogenetic and molecular genetic analyses are reported for seven patients with NK-cell-LGL proliferation. The typical immunophenotype was CD2+, CD3-, CD4-, CD11b+, and CD16+ or CD56+. A low but variable percentage of cells were CD8+ or CD57+. Unusual phenotypes with CD2- (1 of 7), CD11b- (1 of 7), or CD16-/CD56- (1 of 7) cells were seen. Strong NK-cell activity was observed in all cases, indicating that none of the NK-cell markers (CD11b, CD16, CD56, CD57) is essential for NK-cell activity. One patient died shortly after diagnosis from coexistent refractory multiple myeloma and another patient died within 1 month from the LGL proliferation. The other patients had been followed for 12 to 70 months, with a median follow-up period of 38 months. There was no progression of their LGL proliferation. Lymphocyte counts varied from 3.3 x 10(3)/microL to 58.4 x 10(3)/microL at the time of diagnosis. Unexplained anemia and neutropenia were observed in one patient. Cytogenetic abnormalities were detected in two of four patients studied with t(6;12) in one and der(5), der(6), and der(11) in the other. The approximately T gamma and T beta genes were in the germline configuration and Epstein-Barr virus DNA was undetectable in five of five patients studied. Natural killer-cell LGL proliferations were morphologically indistinguishable from T-cell LGL proliferations. However, the two were immunophenotypically and genotypically distinct and NK-cell activity was consistently observed in the former. Most of the NK-cell proliferations also were chronic indolent disorders and the incidence of associated cytopenias seemed to be lower than T-cell LGL proliferations.
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Affiliation(s)
- W C Chan
- Department of Pathology/Microbiology, University of Nebraska Medical Center, Omaha 68198-3135
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Strong TV, Smit LS, Nasr S, Wood DL, Cole JL, Iannuzzi MC, Stern RC, Collins FS. Characterization of an intron 12 splice donor mutation in the cystic fibrosis transmembrane conductance regulator (CFTR) gene. Hum Mutat 1992; 1:380-7. [PMID: 1284540 DOI: 10.1002/humu.1380010506] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [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: 12/26/2022]
Abstract
Cystic fibrosis, the most common lethal genetic disease in the white population, is caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene. Analysis of DNA from a pancreatic insufficient patient by chemical mismatch cleavage and subsequent DNA sequencing led to the identification of a potential splice mutation in the CFTR gene. A transition of the invariant guanosine to adenosine (1898 + 1G > A) was found at the splice donor site of intron 12. To determine the effect of this mutation on the patient's CFTR transcripts, RNA from the nasal epithelium was reverse transcribed and amplified by the polymerase chain reaction (RT-PCR). Direct sequencing of the PCR products revealed that the transcript from the chromosome with the 1898 + 1G > A mutation had skipped exon 12 entirely, resulting in a joining of exons 11 and 13. Deletion of exon 12 results in the removal of a highly conserved region which encodes the Walker B consensus sequence of the first nucleotide-binding fold of CFTR.
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Affiliation(s)
- T V Strong
- Department of Human Genetics, University of Michigan, Ann Arbor 48109-0650
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Findley HW, Nasr S, Afify Z, Hnath R, Waldrep K, Ragab AH. Effects of recombinant interferon-gamma and interleukin-2 on the generation of lymphokine-activated killer cells in vitro. Cancer Invest 1990; 8:493-500. [PMID: 2124946 DOI: 10.3109/07357909009012073] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [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: 12/30/2022]
Abstract
In order to determine if recombinant interferon-gamma (rIFN-gamma) can augment the effect of recombinant interleukin-2 (rIL-2) in generating lymphokine-activated killer (LAK) cells, we have incubated normal peripheral blood mononuclear cells (PBMC) with these lymphokines for 3 days and then tested their LAK and natural killer (NK) cell activity. We have found that LAK activity in PBMC from 13 out of 13 normal donors was increased by the combined lymphokines above that due to either lymphokine alone, provided that rIL-2 was present at suboptimal concentration: Optimal levels of rIFN-gamma (100 U/ml) were able to enhance the LAK-inducing activity of suboptimal levels (5 U/ml) but not optimal levels (100 U/ml) of rIL-2. NK activity showed a similar response to these concentrations of lymphokines. Activation of LAK/NK cells was accompanied by increases in the percentages of Leu 19+ (CD56) cells and TAC+ (IL-2-receptor) cells, and in the intensity of TAC antigen expression. These results indicate that combination rIFN-gamma and rIL-2 may be more effective in generating LAK/NK cells than rIL-2 alone, particularly with suboptimal concentrations of rIL-2 such as occur during continuous infusion therapy with this agent.
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Affiliation(s)
- H W Findley
- Division of Pediatric Hematology/Oncology, Emory University, Atlanta, Georgia
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Nasr S, McKolanis J, Pais R, Findley H, Hnath R, Waldrep K, Ragab AH. A phase I study of interleukin-2 in children with cancer and evaluation of clinical and immunologic status during therapy. A Pediatric Oncology Group Study. Cancer 1989; 64:783-8. [PMID: 2787201 DOI: 10.1002/1097-0142(19890815)64:4<783::aid-cncr2820640402>3.0.co;2-f] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [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: 01/02/2023]
Abstract
The authors performed a Phase I study to assess the toxicity and hematologic effect of recombinant human interleukin-2 (rIL-2) in seven children with advanced malignancies. The rIL-2 was given as a bolus injection of 1 or 3 X 10(6) U/m2/dose three times a week (Monday, Wednesday, and Friday) for 3 weeks. No life-threatening toxicity occurred with the dose of 1 X 10(6) U/m2 of rIL-2. At a dose of 3 X 10(6) U/m2, therapy had to be terminated due to cardiovascular toxicity in two patients. Toxic effects at low-dose rIL-2 included fever, nausea, vomiting, and mild hypotension. High-dose rIL-2 toxicity included fluid retention, increased creatinine, oliguria, elevated liver enzymes, and significant hypotension. Immunologic studies showed that rIL-2 caused a drop in the number of circulating peripheral blood mononuclear cells, T-cells, and natural killer cells which returned to pretherapy levels or above by 24 to 48 hours. The rIL-2 exerted no growth or stimulatory activity on the leukemic cell population. To the authors' knowledge, this is the first report of a Phase I study of IL-2 therapy in children.
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Affiliation(s)
- S Nasr
- Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia 30322
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