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Ramadan S, Buchwald P, Olsson Å. Risk of appendiceal malignancy in conservatively treated acute appendicitis. Scand J Surg 2023; 112:227-234. [PMID: 37705259 DOI: 10.1177/14574969231190293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
BACKGROUND AND AIMS Appendectomy has historically been the standard treatment of acute appendicitis, but lately, conservative treatment of uncomplicated acute appendicitis with antibiotics has successfully been used in selected patients. Complicated acute appendicitis is often treated conservatively initially, but may benefit from interval appendectomy due to the higher risk of appendiceal malignancy and recurrence. Recommendations for follow-up after conservatively treated appendicitis vary. Furthermore, the risk of underlying malignancy and the necessity of routine interval appendectomy are unclear. This study aims to evaluate follow-up status, recurrence, and underlying appendiceal malignancy in conservatively treated uncomplicated and complicated acute appendicitis. METHODS This study included patients with conservatively treated acute appendicitis at Skåne University Hospital, Sweden during 2012-2019. Information on patient demographics at index admission and data on follow-up, recurrence, number of appendectomies after initial conservative treatment, and underlying malignancy were retrieved from medical charts. RESULTS The study cohort included 391 patients, 152 with uncomplicated and 239 with complicated acute appendicitis. Median time of study follow-up was 52 months. The recurrence risk was 23 (15.1%) after uncomplicated and 58 (24.3%) after complicated acute appendicitis (p = 0.030). During follow-up, 55 (23%) patients with complicated acute appendicitis underwent appendectomy. Appendiceal malignancies were found in 12 (5%) patients with previous complicated acute appendicitis versus no appendiceal malignancies after uncomplicated acute appendicitis (p = 0.002). CONCLUSION The risk of appendiceal malignancy and recurrent appendicitis was significantly higher in patients with complicated acute appendicitis compared with uncomplicated acute appendicitis.
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Affiliation(s)
- Shaima Ramadan
- Colorectal Unit
- Department of Surgery Skåne University Hospital SE-205 02 Malmö Sweden
- Department of Clinical Sciences, Malmö Lund University Malmö Sweden
| | - Pamela Buchwald
- Colorectal Unit, Department of Surgery, Skåne University Hospital, Malmö, Sweden
- Department of Clinical Sciences, Malmö, Lund University, Malmö, Sweden
| | - Åsa Olsson
- Colorectal Unit, Department of Surgery, Skåne University Hospital, Malmö, Sweden
- Department of Clinical Sciences, Malmö, Lund University, Malmö, Sweden
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2
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Mehta S, Vieira D, Zerpa D, Guillen V, Carrasquel M, Ramadan S, Martinez F, Rossitto F, Carrera K, Fleming M, Pinos D, Brena-Pastor L, Ozair S, Gonzalez A, Barco A. No need for a cardiologist for AMI diagnosis – progress of transforming a behemoth telemedicine program with artificial intelligence. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
The Latin American Telemedicine Infarct Network (LATIN) Telemedicine is a mammoth hub and spoke model that provides an umbrella of AMI protection for 100 million patients. In the program, 826,043 patients had a telemedicine encounter; 7,400 with AMI were diagnosed; 4,332 of them managed with guidelines-based strategies. We have gradually begun implementing a system for using Artificial Intelligence (AI) algorithms embedded into EKGs for rapid and accurate STEMI detection and validated the results with a cardiologist's interpretations.
Purpose
To test whether an AI-driven EKG algorithm can effectively substitute a cardiologist for STEMI telemedicine protocols.
Methods
The AI algorithm construction was in the following fashion. Sample: a selection of 8,511 EKG and 90,592 classified heartbeats. Pre-processing: segmentation of each EKG into individual heartbeats. Training & testing: 90% and 10% of the total dataset, respectively. Classification: 1-D Convolutional Neural Network; the study constructed classes for each heartbeat. The algorithm was next deployed on a consecutive series of LATIN EKG records to diagnose STEMI. We afterwards compared the algorithm's results with eight expert cardiologists' interpretations of the same sample.
Results
This study achieved a concordance of 91% between the AI algorithm and cardiologist interpretation (Figure 1).
Conclusions
The initial results with AI algorithms for STEMI diagnosis are encouraging and may provide the base work for new tools for cardiologists to improve their efficiency. Moreover, implementing this innovative tool may overcome current limitations associated with the telemedical management of this disease.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- S Mehta
- Lumen Foundation , Miami , United States of America
| | - D Vieira
- Lumen Foundation , Miami , United States of America
| | - D Zerpa
- Lumen Foundation , Miami , United States of America
| | - V Guillen
- Lumen Foundation , Miami , United States of America
| | - M Carrasquel
- Lumen Foundation , Miami , United States of America
| | - S Ramadan
- Lumen Foundation , Miami , United States of America
| | - F Martinez
- Lumen Foundation , Miami , United States of America
| | - F Rossitto
- Lumen Foundation , Miami , United States of America
| | - K Carrera
- Lumen Foundation , Miami , United States of America
| | - M Fleming
- Lumen Foundation , Miami , United States of America
| | - D Pinos
- Lumen Foundation , Miami , United States of America
| | | | - S Ozair
- Lumen Foundation , Miami , United States of America
| | - A Gonzalez
- Lumen Foundation , Miami , United States of America
| | - A Barco
- Lumen Foundation , Miami , United States of America
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Ofori JK, Karagiannopoulos A, Nagao M, Westholm E, Ramadan S, Wendt A, Esguerra JL, Eliasson L. Human Islet MicroRNA-200c Is Elevated in Type 2 Diabetes and Targets the Transcription Factor ETV5 to Reduce Insulin Secretion. Diabetes 2022; 71:275-284. [PMID: 34753799 PMCID: PMC8914283 DOI: 10.2337/db21-0077] [Citation(s) in RCA: 1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 10/29/2021] [Indexed: 11/13/2022]
Abstract
MicroRNAs (miRNAs) are part of deregulated insulin secretion in type 2 diabetes (T2D) development. Rodent models have suggested miR-200c to be involved, but the role and potential as therapeutic target of this miRNA in human islets are not clear. Here we report increased expression of miR-200c in islets from T2D as compared with nondiabetic (ND) donors and display results showing reduced glucose-stimulated insulin secretion in EndoC-βH1 cells overexpressing miR-200c. We identify transcription factor ETV5 as the top rank target of miR-200c in human islets using TargetScan in combination with Pearson correlation analysis of miR-200c and mRNA expression data from the same human donors. Among other targets were JAZF1, as earlier shown in miR-200 knockout mice. Accordingly, linear model analysis of ETV5 and JAZF1 gene expression showed reduced expression of both genes in islets from human T2D donors. Western blot analysis confirmed the reduced expression of ETV5 on the protein level in EndoC-βH1 cells overexpressing miR-200c, and luciferase assay validated ETV5 as a direct target of miR-200c. Finally, LNA knockdown of miR-200c increased glucose-stimulated insulin secretion in islets from T2D donors approximately threefold. Our data reveal a vital role of the miR-200c-ETV5 axis in β-cell dysfunction and pathophysiology of T2D.
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Ramadan S, Quan K, Schnarr K, Juergens R, Hotte S, Kapoor A, Meyers B, Swaminath A. Impact of Stereotactic Body Radiotherapy (SBRT) in Oligoprogressive Metastatic Disease. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.1329] [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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Novak U, Fehr M, Schär S, Dreyling M, Scheubeck G, Ramadan S, Zucca E, Zander T, Hess G, Mey U, Ferrero S, Mach N, Boccomini C, Böttcher S, Voegeli M, Cairoli A, Menter T, Dirnhofer S, Gadient S, Eckhardt K, Driessen C, Renner C. SAKK 36/13 ‐ IBRUTINIB PLUS BORTEZOMIB AND IBRUTINIB MAINTENANCE FOR RELAPSED AND REFRACTORY MANTLE CELL LYMPHOMA: FINAL REPORT OF A PHASE I/II TRIAL OF THE EUROPEAN MCL NETWORK. Hematol Oncol 2021. [DOI: 10.1002/hon.62_2879] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- U. Novak
- Inselspital, Bern University Hospital Medical Oncology Bern Switzerland
| | - M. Fehr
- Kantonsspital St. Gallen Department of Medical Oncology and Hematology St. Gallen Switzerland
| | - S. Schär
- SAKK Coordinating Center Bern Switzerland
| | - M. Dreyling
- Universität München‐Grossadern Medizinische Klinik III München Germany
| | - G. Scheubeck
- Universität München‐Grossadern Medizinische Klinik III München Germany
| | - S. Ramadan
- IEO, European Institute of Oncology IRCCS Onco‐Hematology Division Milano Italy
| | - E. Zucca
- Oncology Institute of Southern Switzerland Ospedale San Giovanni Bellinzona Switzerland
| | - T. Zander
- Kantonsspital Luzern Department Oncology Luzern Switzerland
| | - G. Hess
- Johannes Gutenberg Universität Mainz Universitätsmedizin Mainz Germany
| | - U. Mey
- Kantonsspital Graubünden Department of Oncology and Hematology Chur Switzerland
| | - S. Ferrero
- AOU "Città della Salute e della Scienza di Torino" Hematology 1 Torino Italy
| | - N. Mach
- University Hospital of Geneva Department of Oncology Genève Switzerland
| | - C. Boccomini
- AOU "Città della Salute e della Scienza di Torino" Hematology 1 Torino Italy
| | - S. Böttcher
- Rostock University Medical Center Department of Medicine, Clinic III ‐ Hematology, Oncology Palliative Medicine Rostock Germany
| | - M. Voegeli
- Kantonsspital Baselland Oncology Liestal Switzerland
| | - A. Cairoli
- CHUV University Hospital and University of Lausanne Service et Laboratoire Central d'Hématologie Département d'Oncologie Lausanne Switzerland
| | - T. Menter
- University Hospital Basel Institute of Pathology and Medical Genetics Basel Switzerland
| | - S. Dirnhofer
- University Hospital Basel Institute of Pathology and Medical Genetics Basel Switzerland
| | - S. Gadient
- SAKK Coordinating Center Bern Switzerland
| | | | - C. Driessen
- Kantonsspital St. Gallen Department of Medical Oncology and Hematology St. Gallen Switzerland
| | - C. Renner
- Onkozentrum, Hirslanden & Zürich Zürich Switzerland
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Abstract
Case report A 76-year-old Caucasian woman with a history of previous BCCs excised from the head and legs was referred from the dermatology team with a biopsy proven superficial BCC to the left palm. The patient had presented to the dermatology team with the same lesion 7 years prior to the definitive diagnosis. The lesion was described as 27 × 15 mm scaly, poorly-defined, plaque-like lesion to the central palm. There was no ulceration or visible telangiectasia. At the time, an initial diagnosis of psoriasis was given and she received several courses of topical treatments to no avail. Eventually, a biopsy was taken which revealed a multifocal superficial BCC. After unsuccessful attempts at treating with topical Imiquimod, the lesion was surgically excised and resurfaced with a full thickness skin graft. Discussion The current understanding that BCCs derive from cells of the hair follicle cannot explain their appearance on the palm. Alternative hypotheses have been proposed as to their actual origin which would account for this rare occurrence. Ultimately, histology can determine the nature of the lesion. We urge clinicians encountering atypical, non-healing lesions to glabrous skin to keep in mind a diagnosis of skin cancer as a delayed diagnosis can lead to increased morbidity.
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Affiliation(s)
- S. Ramadan
- Mersey Regional Plastic Surgery and Burns Service, Whiston Hospital, Liverpool, UK
- Corresponding author.
| | - N. Sharma
- Department of Dermatopathology, Whiston Hospital, Liverpool, UK
| | - Z. Hassan
- Mersey Regional Plastic Surgery and Burns Service, Whiston Hospital, Liverpool, UK
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7
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Derenzini E, Ramadan S, Vanazzi A, Radice T, Avenoso D, Mulè A, Sammassimo S, Gigli F, Iannitto E, Consoli U, Patti C, Tarella C. PREDICTIVE VALUE OF END-OF-TREATMENT POSITRON EMISSION TOMOGRAPHY SCAN AFTER DA-EPOCH-R IN PRIMARY MEDIASTINAL B-CELL LYMPHOMA. REAL-LIFE EXPERIENCE. Hematol Oncol 2019. [DOI: 10.1002/hon.135_2631] [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)
- E. Derenzini
- Oncohematology; European Institute of Oncology IRCCS; Milan Italy
| | - S. Ramadan
- Oncohematology; European Institute of Oncology IRCCS; Milan Italy
| | - A. Vanazzi
- Oncohematology; European Institute of Oncology IRCCS; Milan Italy
| | - T. Radice
- Oncohematology; European Institute of Oncology IRCCS; Milan Italy
| | - D. Avenoso
- Oncohematology; European Institute of Oncology IRCCS; Milan Italy
| | - A. Mulè
- Hematology Division; Ospedale Villa Sofia-Cervello; Palermo Italy
| | - S. Sammassimo
- Oncohematology; European Institute of Oncology IRCCS; Milan Italy
| | - F. Gigli
- Oncohematology; European Institute of Oncology IRCCS; Milan Italy
| | - E. Iannitto
- Divisione di Oncoematologia; Casa di Cura la Maddalena; Palermo Italy
| | - U. Consoli
- Division of Hematology; ARNAS Garibaldi; Catania Italy
| | - C. Patti
- Hematology Division; Ospedale Villa Sofia-Cervello; Palermo Italy
| | - C. Tarella
- Oncohematology; European Institute of Oncology IRCCS; Milan Italy
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8
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Wright P, Ramadan S, Suilamo S, Mali P, Minn H. EP-1950 Phase gated lung SBRT verified by fluoroscopy. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)32370-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Ghez D, Fortpied C, Mounier N, Carde P, Perrot A, Khaled H, Amorim S, Ramadan S, Bras FL, Erlanson M, Herbaux C, Marolleau JP, Nicolas-Virelezier E, Casasnovas O, Stamatoullas-Bastard A, Fermé C. First-line escalated BEACOPP does not hinder stem cell collection and transplantation strategy in patients with relapsed/refractory Hodgkin's lymphoma. Bone Marrow Transplant 2016; 52:310-312. [PMID: 27892946 DOI: 10.1038/bmt.2016.271] [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: 11/09/2022]
Affiliation(s)
- D Ghez
- Department of Hematology, Gustave Roussy, Villejuif, France
| | | | - N Mounier
- Department of Onco-Hematology, CHU l'Archet, Nice, France
| | - P Carde
- Department of Hematology, Gustave Roussy, Villejuif, France
| | - A Perrot
- Department of Hematology, CHU Nancy-Brabois, Vandoeuvre Les Nancy, France
| | - H Khaled
- Department of Medical Oncology, National Cancer Institute, Cairo, Egypt
| | - S Amorim
- Department of Oncology and Hematology, Hopital Saint-Louis APHP, Université Paris Diderot, Paris, France
| | - S Ramadan
- EORTC Headquarters, Brussels, Belgium
| | - F L Bras
- Unité Hémopathies Lymphoïdes, Hôpital Henri Mondor, Creteil, France
| | - M Erlanson
- Department of Oncology, Umea Universitet, Umea, Sweden
| | - C Herbaux
- Department of Clinical Hematology, Hôpital Claude Huriez, Université de Lille 2, Lille, France
| | - J-P Marolleau
- Department of Hematology, CHU Amiens, Université Picardie Jules Verne, Amiens, France
| | | | - O Casasnovas
- Department of Hematology, CHU Dijon, Dijon, France
| | | | - C Fermé
- Department of Hematology, Gustave Roussy, Villejuif, France
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10
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Al-Sayegh N, Al-Shuwai N, Ramadan S, Al-Qurba T, Al-Obaidi SM, Dean E. Benchmarking the health of health sciences students at Kuwait University: towards a culture of health. East Mediterr Health J 2016; 22:619-627. [PMID: 27834444 DOI: 10.26719/2016.22.8.619] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 07/18/2016] [Indexed: 11/09/2022]
Abstract
Health professional entry-to-practice programmes are intense, competitive and prolonged. The aims of this study were to benchmark the health of health sciences students at Kuwait University, thereby informing student health services, and to establish a base for individual student's health assessments throughout the programmes. We used a convenience sample of 176 students. Assessment included a health/wellness questionnaire (smoking, nutrition, physical activity, sleep and stress) and objective measures (resting heart rate, blood pressure, waist-to-hip ratio and random blood glucose). Students had suboptimal activity, diet, stress and sleep. Health was suboptimal based on significant proportions of students in unhealthy categories for resting heart rate, blood pressure and body composition. Health status of health sciences students at Kuwait University is not consistent with healthy health professionals in training, who should serve as role models for the public. A culture of health on campus is recommended to maximize the health of students and their capacity as health role models.
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Affiliation(s)
- N Al-Sayegh
- Department of Physical Therapy, Faculty of Allied Health Sciences, Kuwait University, Sulaibikhat, Kuwait
| | - N Al-Shuwai
- Department of Physical Therapy, Faculty of Allied Health Sciences, Kuwait University, Sulaibikhat, Kuwait
| | - S Ramadan
- Department of Physical Therapy, Faculty of Allied Health Sciences, Kuwait University, Sulaibikhat, Kuwait
| | - T Al-Qurba
- Department of Health Information Administration, Faculty of Allied Health Sciences, Kuwait University, Sulaibikhat, Kuwait
| | - S M Al-Obaidi
- Department of Physical Therapy, Faculty of Allied Health Sciences, Kuwait University, Sulaibikhat, Kuwait
| | - E Dean
- Department of Physical Therapy, Faculty of Allied Health Sciences, Kuwait University, Sulaibikhat, Kuwait; Department of Physical Therapy, Faculty of Medicine, University of British Columbia, Vancouver, Canada
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11
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Burke JP, Kelleher B, Ramadan S, Quinlan M, Sugrue D, O'Donovan MA. Pericarditis as a complication of infliximab therapy in Crohn's disease. Inflamm Bowel Dis 2008; 14:428-9. [PMID: 17924565 DOI: 10.1002/ibd.20270] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Abstract
Congenital choanal atresia (CCA) is the developmental failure of the nasal cavity to communicate with the nasopharynx. The aim of this study was to investigate and analyse the CT findings in such cases. Seven patients with CCA were included in our study over a 3-year period (2001-2004). All had a CT scan of the nasal cavity and nasopharynx to establish the diagnosis and to define the extent and type of atresia. The choanal atresia was found to be more commonly bilateral and more of the mixed (membranous-osseous) type. Bilateral CCA in the neonate is a medical emergency that should be treated as early as possible. Computed tomography is a valuable and easily accessible diagnostic tool.
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Affiliation(s)
- L Petkovska
- Department of Radiology, Al Adan Hospital, Kuwait.
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13
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Candi E, Rufini A, Terrinoni A, Dinsdale D, Ranalli M, Paradisi A, De Laurenzi V, Spagnoli LG, Catani MV, Ramadan S, Knight RA, Melino G. Differential roles of p63 isoforms in epidermal development: selective genetic complementation in p63 null mice. Cell Death Differ 2007; 13:1037-47. [PMID: 16601749 DOI: 10.1038/sj.cdd.4401926] [Citation(s) in RCA: 210] [Impact Index Per Article: 12.4] [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: 12/21/2022] Open
Abstract
Epidermal development requires the transcription factor p63, as p63-/- mice are born dead, without skin. The gene expresses two proteins, one with an amino-terminal transactivation domain (TAp63) and one without (deltaNp63), although their relative contribution to epidermal development is unknown. To address this issue, we reintroduced TAp63alpha and/or deltaNp63alpha under the K5 promoter into p63-/- mice by in vivo genetic complementation. Whereas p63-/- and p63-/-;TA mice showed extremely rare patches of poorly differentiated keratinocytes, p63-/-;deltaN mice showed significant epidermal basal layer formation. Double TAp63alpha/deltaNp63alpha complementation showed greater patches of differentiated skin; at the ultrastructural level, there was clear reformation of a distinct basal membrane and hemidesmosomes. At the molecular level, deltaNp63 regulated expression of genes characteristic of the basal layer (K14), interacting (by Chip, luc assay) with the third p53 consensus site. Conversely, TAp63 transcribed the upper layer's genes (Ets-1, K1, transglutaminases, involucrin). Therefore, the two p63 isoforms appear to play distinct cooperative roles in epidermal formation.
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Affiliation(s)
- E Candi
- Biochemistry Laboratory, IDI-IRCCS, c/o University of Rome Tor Vergata, 00133 Rome, Italy
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14
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Ramos L, Mellado S, Ramadan S, Bulacio L, López C. [The use of calcofluor white for studying Malassezia species by direct microscopy]. Rev Argent Microbiol 2006; 38:4-8. [PMID: 16784125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023] Open
Abstract
Fungi of Malassezia genus are known as normal flora in human beings. However, different pathologies due to Malassezia, have been described. Traditionally, early diagnosis was delayed because of the difficulties in culture isolation of these organisms. The aim of this work, is to evaluate the technique of observation microscopy with calcofluor, for identification of Malassezia in both, clinical samples and isolates. In comparison to traditional method of direct examination with lactophenol-blue, calcofluor method offers an advantage because it turns easier the observation of fungal elements and its budding pattern. This technique contributes then, to identify species of Malassezia. The analysis of clinical specimens with calcofluor followed by observation under fluorescence microscopy is a simple and rapid method for the identification, and contribute therefore to the early diagnosis.
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Affiliation(s)
- L Ramos
- CEREMIC (Centro de Referencia en Micología) Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, (2000) Rosario.
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15
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Belfield H, Chikh A, Ramadan S. Erratum: Apoptosis methods and protocols. Cell Death Differ 2005. [DOI: 10.1038/sj.cdd.4401741] [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: 11/09/2022] Open
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16
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Kuchel PW, Bubb WA, Ramadan S, Chapman BE, Philp DJ, Coen M, Gready JE, Harvey PJ, McLean AJ, Hook J. 31P MAS-NMR of human erythrocytes: independence of cell volume from angular velocity. Magn Reson Med 2004; 52:663-8. [PMID: 15334588 DOI: 10.1002/mrm.20139] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [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: 11/11/2022]
Abstract
31P magic angle spinning NMR (MAS-NMR) spectra were obtained from suspensions of human red blood cells (RBCs) that contained the cell-volume-sensitive probe molecule, dimethyl methylphosphonate (DMMP). A mathematical representation of the spectral-peak shape, including the separation and width-at-half-height in the 31P NMR spectra, as a function of rotor speed, enabled us to explore the extent to which a change in cell volume would be reflected in the spectra if it occurred. We concluded that a fractional volume change in excess of 3% would have been detected by our experiments. Thus, the experiments indicated that the mean cell volume did not change by this amount even at the highest spinning rate of 7 kHz. The mean cell volume and intracellular 31P line-width were independent of the packing density of the cells and of the initial cell volume. The relationship of these conclusions to other non-NMR studies of pressure effects on cells is noted.
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Affiliation(s)
- P W Kuchel
- School of Molecular and Microbial Biosciences, University of Sydney, NSW, Australia.
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17
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Manning T, Smoller BR, Horn TD, El Darouti M, Marzouk S, Hadidi HE, Ramadan S. Evaluation of anti-thrombomodulin antibody as a tumor marker for vascular neoplasms. J Cutan Pathol 2004; 31:652-6. [PMID: 15491324 DOI: 10.1111/j.0303-6987.2004.00245.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [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: 11/27/2022]
Abstract
BACKGROUND Various endothelial markers are available for the evaluation of vascular tumors and malformations, including anti CD34, anti-CD31, von Willebrand factor (vWF), and anti-thrombomodulin (anti-TM) antibodies. All have their limitations, and we sought to compare the utility of anti-TM antibody as a marker for several types of vascular neoplasms vs. previously established endothelial markers. METHODS We examined immunostaining profiles of 30 capillary hemangiomas, 10 pyogenic granulomas, five tufted angiomas, 17 Kaposi's sarcomas, and nine angiosarcomas. Immunostains for TM, CD34, and vWF were carried out using a labeled streptavidin-biotin peroxidase detection system. RESULTS Anti-TM antibody showed moderately intense immunostaining in 89% of benign and malignant vascular neoplasms. Anti-CD34 antibody showed moderate to diffuse immunostaining in 98% of vascular neoplasms, and vWF showed weak focal staining in 84% of all vascular neoplasms examined. CONCLUSION Anti-TM antibody proved to be a sensitive marker for both benign and malignant vascular neoplasms. While not as sensitive as anti-CD34, it may have some advantages in specificity that would make it a more reliable vascular tumor marker in certain situations.
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Affiliation(s)
- Trey Manning
- Department of Dermatology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
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18
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Abstract
Cherubism is a rare autosomal dominant fibro-osseous disorder of childhood, mostly limited to the maxilla and mandible. Extra-cranial skeletal involvement is rare. Post-pubertal involution of the process and jaw remodeling occurs in adulthood. The aim of this case report is to present four cherubs, a father and his three daughters, in whom the diagnosis was made based on history, physical examination, laboratory tests and typical radiological features. The imaging characteristics are discussed and the published literature is reviewed.
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Affiliation(s)
- L Petkovska
- Radiology Department, Al-Adan Hospital, Safat 5326, Kuwait.
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Abd-Almageed W, Smith C, Ramadan S. Kernel snakes: Non-parametric active contour models. SMC'03 Conference Proceedings. 2003 IEEE International Conference on Systems, Man and Cybernetics. Conference Theme - System Security and Assurance (Cat. No.03CH37483) 2004. [DOI: 10.1109/icsmc.2003.1243822] [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: 09/02/2023]
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Cadot B, Rufini A, Pietroni V, Ramadan S, Guerrieri P, Melino G, Candi E. Overexpressed transglutaminase 5 triggers cell death. Amino Acids 2004; 26:405-8. [PMID: 15290346 DOI: 10.1007/s00726-004-0084-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2003] [Accepted: 12/02/2003] [Indexed: 11/25/2022]
Abstract
Transglutaminases are a class of nine different proteins involved in many biological phenomena such as differentiation, tissue repair, endocytosis. Transglutaminase 5 was originally cloned from skin keratinocytes, and a partial biochemical characterization showed its involvement in skin differentiation. Here we demonstrate that transglutaminase 5 is able to induce cell death when intracellularly overexpressed. Transfected cells show enzymatic activity, as demonstrated by fluoresceincadaverine staining. Transfected cells died due to the formation of hypodiploid DNA content, indicating the induction of cell death under these pharmacological conditions. We also show that the primary sequence of transglutaminase 5 contains GTP binding domains which are similar to those in transglutaminase 2. This raises the possibility that transglutaminase 5 is regulated by GTP in a similar fashion to transglutaminase 2.
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Affiliation(s)
- B Cadot
- Biochemistry Laboratory, IDI-IRCCS, University of Rome Tor Vergata, Rome, Italy
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Omar MT, El-Khamry A, Youssef AM, Ramadan S. Synthesis and Stereochemistry of Thiapyranothiazoles as Diels-Alder Adducts Obtained from Spirodimers of 1,3-Thiazolidines with Cinnamic Acid and its Ester. PHOSPHORUS SULFUR 2003. [DOI: 10.1080/10426500307800] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Irshaid NM, Ramadan S, Wester ES, Olausson P, Hellberg A, Merza JY, Olsson ML. Phenotype prediction by DNA-based typing of clinically significant blood group systems in Jordanian blood donors. Vox Sang 2002; 83:55-62. [PMID: 12100390 DOI: 10.1046/j.1423-0410.2002.00182.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND OBJECTIVES During the past 10 years several DNA-typing methods have been developed to complement routine serological typing for determination of polymorphisms in the ABO, RH, KEL, JK and FY blood group genes. However, the molecular basis of blood groups can differ widely between ethnic groups. The purpose of this study was to evaluate selected DNA-based methods for phenotype prediction in a population not previously investigated. MATERIALS AND METHODS Blood samples from a random sample of Jordanian blood donors were collected and red cells isolated from these blood samples were phenotyped for common ABO (n = 150) and KEL/FY/JK (n = 90) antigens. RHD-negative and -positive donors were selected for RH typing (n = 120 and 30, respectively). DNA was prepared and blood group genotyping performed according to selected methods in current use. Discordant samples required further investigation by extended serology and DNA sequencing. RESULTS The degree of concordance between phenotype and genotype was high, but some exceptions were noted. Two of 14 A2/A2B samples lacked all mutations associated with known A2 alleles of the ABO system. RH typing revealed four samples with the c(cyt48) marker, causing false-positive RHC typing. A single D-negative sample was positive for D-specific exon 10 markers. The RHD pseudogene was not found in the 150 donors tested. Nine samples revealed discrepancies that were associated with unknown silent or weakly expressing Fyb-like alleles. CONCLUSIONS With the exception of the FY system, we conclude that the molecular background of the clinically important blood group antigens studied here is similar to that reported for Caucasoids.
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Affiliation(s)
- N M Irshaid
- Department of Transfusion Medicine, Institute of Laboratory Medicine, Lund University, Lund, Sweden
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Ramadan S, Abd-Alla M, Hassan MY. Thermostatic properties of semi-infinite polarized nuclear matter. Phys Rev C Nucl Phys 1996; 53:1670-1683. [PMID: 9971118 DOI: 10.1103/physrevc.53.1670] [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: 05/22/2023]
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Atkinson EJ, Clezy PS, Leung CWF, Ramadan S, Salek A, Zhuo MX. The Chemistry of Pyrrolic Compounds. LXX. The Synthesis of Model Porphyrins as an Aid to the Recognition of Chlorobium-Derived Petroporphyrins in the Julia Creek Oil Shale Deposit. Aust J Chem 1995. [DOI: 10.1071/ch9951873] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In order to obtain evidence for the presence of Chlorobium -derived petroporphyrins in the Julia Creek oil shales a range of simple porphyrins (10d-i) carrying the type of side chain characteristic of Chlorobium chlorophylls has been prepared for study by mass spectroscopic techniques. One approach to the preparation of a Chlorobium-type petroporphyrin by ring synthesis has met with very limited success.
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Abd-Alla M, Ramadan S, Hassan MY. Thermostatic properties of polarized nuclear matter. Phys Rev C Nucl Phys 1987; 36:1565-1572. [PMID: 9954248 DOI: 10.1103/physrevc.36.1565] [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: 05/22/2023]
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