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Ammar A, Koshyk A, Kohut M, Alolabi B, Quenneville CE. The Use of Optical Tracking to Characterize Fracture Gap Motions and Estimate Healing Potential in Comminuted Biomechanical Models of Surgical Repair. Ann Biomed Eng 2023; 51:2258-2266. [PMID: 37294414 DOI: 10.1007/s10439-023-03265-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 05/31/2023] [Indexed: 06/10/2023]
Abstract
Fracture healing is stimulated by micromotion at the fracture site, whereby there exists an optimal amount of strain to promote secondary bone formation. Surgical plates used for fracture fixation are often evaluated for their biomechanical performance using benchtop studies, where success is based on overall construct stiffness and strength measures. Integration of fracture gap tracking to this assessment would provide crucial information about how plates support the various fragments present in comminuted fractures, to ensure there are appropriate levels of micromotion during early healing. The goal of this study was to configure an optical tracking system to quantify 3D interfragmentary motion to assess the stability (and corresponding healing potential) of comminuted fractures. An optical tracking system (OptiTrack, Natural Point Inc, Corvallis, OR) was mounted to a material testing machine (Instron 1567, Norwood, MA, USA), with an overall marker tracking accuracy of 0.05 mm. Marker clusters were constructed that could be affixed to individual bone fragments, and segment-fixed coordinate systems were developed. The interfragmentary motion was calculated by tracking the segments while under load and was resolved into compression-extraction and shear components. This technique was evaluated using two cadaveric distal tibia-fibula complexes with simulated intra-articular pilon fractures. Normal and shear strains were tracked during cyclic loading (for stiffness tests), and a wedge gap was also tracked to assess failure in an alternate clinically relevant mode. This technique will augment the utility of benchtop fracture studies by moving beyond total construct response and providing anatomically relevant data on interfragmentary motion, a valuable proxy for healing potential.
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Affiliation(s)
- A Ammar
- School of Biomedical Engineering, McMaster University, Hamilton, ON, Canada
| | - A Koshyk
- Department of Mechanical Engineering, McMaster University, Hamilton, ON, Canada
| | - M Kohut
- School of Biomedical Engineering, McMaster University, Hamilton, ON, Canada
| | - B Alolabi
- Division of Orthopaedic Surgery, Department of Surgery, McMaster University, Hamilton, ON, Canada
| | - C E Quenneville
- School of Biomedical Engineering, McMaster University, Hamilton, ON, Canada.
- Department of Mechanical Engineering, McMaster University, Hamilton, ON, Canada.
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Mhaira W, Agnaou A, Essalim R, Turino A, Mauvy F, Alga M, Zamama M, Ammar A. Effect of simultaneous Cu and Nb doping Bi4V2O11 on structural and electrical properties of Bi4V2−xCux/2Nbx/2O11−3x/4. J SOLID STATE CHEM 2023. [DOI: 10.1016/j.jssc.2023.123878] [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: 02/04/2023]
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Agnaou A, Mhaira W, Essalim R, Zamama M, Mauvy F, Alga M, Ammar A. Correction: New silicon substituted BiMeVO x : synthesis and study of structural properties in relation to ionic conductivity. RSC Adv 2023; 13:8943. [PMID: 36936852 PMCID: PMC10022647 DOI: 10.1039/d3ra90021e] [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] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
[This corrects the article DOI: 10.1039/D3RA00485F.].
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Affiliation(s)
- A Agnaou
- Laboratoire des Sciences des Matériaux et Optimisation des procèdes, Faculté des Sciences-Semlalia, Université Cadi Ayyad Av. My Abdellah B. P. 2390 Marrakech Morocco
| | - W Mhaira
- Laboratoire des Sciences des Matériaux et Optimisation des procèdes, Faculté des Sciences-Semlalia, Université Cadi Ayyad Av. My Abdellah B. P. 2390 Marrakech Morocco
| | - R Essalim
- Laboratoire des Sciences des Matériaux et Optimisation des procèdes, Faculté des Sciences-Semlalia, Université Cadi Ayyad Av. My Abdellah B. P. 2390 Marrakech Morocco
| | - M Zamama
- Laboratoire des Sciences des Matériaux et Optimisation des procèdes, Faculté des Sciences-Semlalia, Université Cadi Ayyad Av. My Abdellah B. P. 2390 Marrakech Morocco
| | - F Mauvy
- CNRS, Univ. Bordeaux, Bordeaux INP, ICMCB, UMR 5026, 87 F-33600 Pessac France
| | - M Alga
- Laboratoire des Sciences des Matériaux et Optimisation des procèdes, Faculté des Sciences-Semlalia, Université Cadi Ayyad Av. My Abdellah B. P. 2390 Marrakech Morocco
| | - A Ammar
- Laboratoire des Sciences des Matériaux et Optimisation des procèdes, Faculté des Sciences-Semlalia, Université Cadi Ayyad Av. My Abdellah B. P. 2390 Marrakech Morocco
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Agnanou A, Mhaira W, Essalim R, Zamama M, Mauvy F, Alga M, Ammar A. New silicon substituted BiMeVO x : synthesis and study of structural properties in relation to ionic conductivity. RSC Adv 2023; 13:8015-8024. [PMID: 36909757 PMCID: PMC9999250 DOI: 10.1039/d3ra00485f] [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] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 02/27/2023] [Indexed: 03/12/2023] Open
Abstract
Partial substitution of vanadium with silicon in the compound Bi4V2O11, which belongs to the Aurivillius family, leads to the creation of a solid solution Bi4V2-x Si x O11-δ (0 ≤ x ≤ 0.4). The compound with x = 0.1 turns out to be a monoclinic α-form of Bi4V2O11, while the compounds with x = 0.2 and x = 0.3 are orthorhombic β-polymorphs, and the compound with x = 0.35 is of tetrahedral γ-polymorph. Electrochemical Impedance Spectroscopy has been used to measure the ionic conductivity of doped samples. The ceramic sample with x = 0.1 has the highest ionic conductivity values.
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Affiliation(s)
- A Agnanou
- Laboratoire des Sciences des Matériaux et Optimisation des procèdes, Faculté des Sciences-Semlalia, Université Cadi Ayyad Av. My Abdellah, B. P. 2390 Marrakech Morocco
| | - W Mhaira
- Laboratoire des Sciences des Matériaux et Optimisation des procèdes, Faculté des Sciences-Semlalia, Université Cadi Ayyad Av. My Abdellah, B. P. 2390 Marrakech Morocco
| | - R Essalim
- Laboratoire des Sciences des Matériaux et Optimisation des procèdes, Faculté des Sciences-Semlalia, Université Cadi Ayyad Av. My Abdellah, B. P. 2390 Marrakech Morocco
| | - M Zamama
- Laboratoire des Sciences des Matériaux et Optimisation des procèdes, Faculté des Sciences-Semlalia, Université Cadi Ayyad Av. My Abdellah, B. P. 2390 Marrakech Morocco
| | - F Mauvy
- CNRS, Univ. Bordeaux, Bordeaux INP, ICMCB, UMR 5026 87 F-33600 Pessac France
| | - M Alga
- Laboratoire des Sciences des Matériaux et Optimisation des procèdes, Faculté des Sciences-Semlalia, Université Cadi Ayyad Av. My Abdellah, B. P. 2390 Marrakech Morocco
| | - A Ammar
- Laboratoire des Sciences des Matériaux et Optimisation des procèdes, Faculté des Sciences-Semlalia, Université Cadi Ayyad Av. My Abdellah, B. P. 2390 Marrakech Morocco
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Mtira A, Chelly S, Ghezal M, Sghaier Z, Rhimi S, Omri N, Ezzi O, Ammar A, Wadiaa B, Hleli R, Mjendel I, Ben Slimen D, Rouiss M, Ferchichi I, Njah M, Mahjoub M. Diabétiques avec COVID-19 admis à l’hôpital régional de Msaken au centre de la Tunisie. Annales d'Endocrinologie 2023. [DOI: 10.1016/j.ando.2022.12.347] [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: 02/13/2023]
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Mtira A, Chelly S, Ghezal M, Sghaier Z, Rhimi S, Omri N, Ezzi O, Ammar A, Bannour W, Hleli R, Mjendel I, Ben Slimen D, Rouiss M, Ferchichi I, Njah M, Mahjoub M. Facteurs de morbi-mortalité chez les diabétiques hospitalisés pour COVID-19 : une étude de cohorte de la population de Msaken-Sousse. Annales d'Endocrinologie 2023. [DOI: 10.1016/j.ando.2022.12.355] [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: 02/13/2023]
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Yacoub A, Ayadi A, Ayed W, Ayari S, Chebbi S, Magroun I, Ben Afia L, Mersni M, Mechergui N, Brahim D, Ben Said H, Bahri G, Youssef I, Ladhari N, Mziou N, Grassa A, M'rad M, Khessairi N, Krir A, Chihaoui M, Mahjoub S, Bahlous A, Jridi M, Cherif Y, Derbal S, Chebbi D, Hentati O, Ben Dahmen F, Abdallah M, Hamdi I, Sahli F, Ouerdani Y, Mnekbi Y, Abaza H, Ajmi M, Guedria A, Randaline A, Ben Abid H, Gaddour N, Maatouk A, Zemni I, Gara A, Kacem M, Maatouk I, Ben Fredj M, Abroug H, Ben Nasrallah C, Dhouib W, Bouanene I, Sriha A, Mahmoudi M, Gharbi G, Khsiba A, Azouz M, Ben Mohamed A, Yakoubi M, Medhioub M, Hamzaoui L, Azouz M, Ben Attig Y, Hamdi S, Essid R, Ben Jemia E, Rezgui B, Boudaya MS, Hassine H, Dabbabi H, Fradi Y, Cherif D, Lassoued I, Yacoub H, Kchir H, Maamouri N, Khairi W, Ben Ammar H, Abaza H, Chelbi E, Merhaben S, Neffati W, Ajmi M, Tarchalla S, Boughzala S, Gazzeh M, Gara S, Labidi A, Touati H, Nefzi AM, Ben Mustpha N, Fekih M, Serghini M, Boubaker J, Zouiten L, Driss A, Meddeb N, Driss I, Walha S, Ben Said H, Bel Hadj Mabrouk E, Zaimi Y, Mensi A, Trad N, Ayadi S, Said Y, Mouelhi L, Dabbèche R, Belfkih H, Bani M, Moussa A, Souissi S, Trabelsi Werchfeni B, Chelly S, Ezzi O, Ammar A, Besbes M, Njah M, Mahjoub M, Ghali H, Neffati A, Bhiri S, Bannour R, Ayadi S, Khouya FE, Kamel A, Hariz E, Aidani S, Kefacha S, Ben Cheikh A, Said H, Dogui S, Atig A, Gara A, Ezzar S, Ben Fradj M, Bouanène I, M'kadmi H, Farhati M, Dakhli N, Nalouti K, Chanoufi MB, Abouda SH, Louati C, Zaaimi Y, Dabbeche R, Hermi A, Saadi A, Mokaddem S, Boussaffa H, Bellali M, Zaghbib S, Ayed H, Bouzouita A, Derouiche A, Allouche M, Chakroun M, Ben Slama R, Gannoun N, Kacem I, Tlili G, Kahloul M, Belhadj Chabbah N, Douma F, Bouhoula M, Chouchene A, Aloui A, Maoua M, Brahem A, Kalboussi H, El Maalel O, Chatti S, Jaidane M, Naija W, Mrizek N, Sellami I, Feki A, Hrairi A, Kotti N, Baklouti S, Jmal Hammami K, Masmoudi ML, Hajjaji M, Naaroura A, Ben Amar J, Ouertani H, Ben Moussa O, Zaibi H, Aouina H, Ben Jemaa S, Gassara Z, Ezzeddine M, Kallel MH, Fourati H, Akrout R, Kallel H, Ayari M, Chehaider A, Souli F, Abdelaali I, Ziedi H, Boughzala C, Haouari W, Chelli M, Soltani M, Trabelsi H, Sahli H, Hamdaoui R, Masmoudi Y, Halouani A, Triki A, Ben Amor A, Makni C, Eloillaf M, Riahi S, Tlili R, Jmal L, Belhaj Ammar L, Nsibi S, Jmal A, Boukhzar R, Somai M, Daoud F, Rachdi I, Ben Dhaou B, Aydi Z, Boussema F, Frikha H, Hammami R, Ben Cheikh S, Chourabi S, Bokri E, Elloumi D, Hasni N, Hamza S, Berriche O, Dalhoum M, Jamoussi H, Kallel L, Mtira A, Sghaier Z, Ghezal MA, Fitouri S, Rhimi S, Omri N, Rouiss S, Soua A, Ben Slimene D, Mjendel I, Ferchichi I, Zmerli R, Belhadj Mabrouk E, Debbeche R, Makhloufi M, Chouchane A, Sridi C, Chelly F, Gaddour A, Kacem I, Chatti S, Mrizak N, Elloumi H, Debbabi H, Ben Azouz S, Marouani R, Cheikh I, Ben Said M, Kallel M, Amdouni A, Rejaibi N, Aouadi L, Zaouche K, Khouya FE, Aidani S, Khefacha S, Jelleli N, Sakly A, Zakhama W, Binous MY, Ben Said H, Bouallegue E, Jemmali S, Abcha S, Wahab H, Hmida A, Mabrouk I, Mabrouk M, Elleuch M, Mrad M, Ben Safta N, Medhioub A, Ghanem M, Boughoula K, Ben Slimane B, Ben Abdallah H, Bouali R, Bizid S, Abdelli MN, Ben Nejma Y, Bellakhal S, Antit S, Bourguiba R, Zakhama L, Douggui MH, Bahloul E, Dhouib F, Turki H, Sabbah M, Baghdadi S, Trad D, Bellil N, Bibani N, Elloumi H, Gargouri D, Ben Said M, Hamdaoui R, Chokri R, Kacem M, Ben Rejeb M, Miladi A, Kooli J, Touati S, Trabelsi S, Klila M, Rejeb H, Kammoun H, Akrout I, Greb D, Ben Abdelghaffar H, Hassene H, Fekih L, Smadhi H, Megdiche MA, Ksouri J, Kasdalli H, Hayder A, Gattoussi M, Chérif L, Ben Saida F, Gueldich M, Ben Jemaa H, Dammak A, Frikha I, Saidani A, Ben Amar J, Aissi W, Chatti AB, Naceur I, Ben Achour T, Said F, Khanfir M, Lamloum M, Ben Ghorbel I, Houman M, Cherif T, Ben Mansour A, Daghfous H, Slim A, Ben Saad S, Tritar F, Naffeti W, Abdellatif J, Ben Fredj M, Selmi M, Kbir GH, Maatouk M, Jedidi L, Taamallah F, Ben Moussa M, Halouani L, Rejeb S, Khalffalah N, Ben Ammar J, Hedhli S, Azouz MM, Chatti S, Athimni Z, Bouhoula M, Elmaalel O, Mrizak N, Maalej M, Kammoun R, Gargouri F, Sallemi S, Haddar A, Masmoudi K, Oussaifi A, Sahli A, Bhouri M, Hmaissi R, Friha M, Cherif H, Baya C, Triki M, Yangui F, Charfi MR, Ben Hamida HY, Karoui S, Aouini F, Hajlaoui A, Jlassi H, Sabbah M, Fendri MN, Kammoun N, Fehri S, Nouagui H, Harzalli A, Snène H, Belakhal S, Ben Hassine L, Labbene I, Jouini M, Kalboussi S, Ayedi Y, Harizi C, Skhiri A, Fakhfakh R, Jelleli B, Belkahla A, Fejjeri M, Zeddini M, Mahjoub S, Nouira M, Frih N, Debiche S, Blibech H, Belhaj S, Mehiri N, Ben Salah N, Louzir B, Kooli J, Bahri R, Chaka A, Abdenneji S, Majdoub Fehri S, Hammadi J, Dorgham D, Hriz N, Kwas H, Issaoui N, Jaafoura S, Bellali H, Shimi M, Belhaj Mabrouk E, Sellami R, Ketata I, Medi W, Mahjoub M, Ben Yacoub S, Ben Chaabene A, Touil E, Ben Ayed H, Ben Miled S, El Zine E, Khouni H, Ben Kadhi S, Maatoug J, Boulma R, Rezgui R, Boudokhane M, Jomni T, Chamekh S, Aissa S, Touhiri E, Jlaiel N, Oueslati B, Maaroufi N, Aouadi S, Belkhir S, Daghfous H, Merhaben S, Dhaouadi N, Ounaes Y, Chaker K, Yaich S, Marrak M, Bibi M, Mrad Dali K, Sellami A, Nouira Y, Sellami S, Anane I, Trabelsi H, Ennaifer R, Benzarti Z, Bouchabou B, Hemdani N, Nakhli A, Cherif Y, Abdelkef M, Derbel K, Barkous B, Yahiaoui A, Sayhi A, Guezguez F, Rouatbi S, Racil H, Ksouri C, Znegui T, Maazaoui S, Touil A, Habibech S, Chaouech N, Ben Hmid O, Ismail S, Chouaieb H, Chatti M, Guediri N, Belhadj Mohamed M, Bennasrallah C, Bouzid Y, Zaouali F, Toumia M, El Khemiri N, El Khemiri A, Sfar H, Farhati S, Ben Chehida F, Yamoun R, Braham N, Hamdi Y, Ben Mansour A, Mtir M, Ayari M, Toumia M, Rouis S, Sakly H, Nakhli R, Ben Garouia H, Chebil D, Hannachi H, Merzougui L, Samet S, Hrairi A, Mnif I, Hentati O, Bouzgarrou L, Souissi D, Boujdaria R, Kadoussi R, Rejeb H, Ben Limem I, Ben Salah I, Greb D, Ben Abdelghaffar H, Smadhi H, Laatiri H, Manoubi SA, Gharbaoui M, Hmandi O, Zhioua M, Taboubi F, Hamza Y, Hannach W, Jaziri H, Gharbi R, Hammami A, Dahmani W, Ben Ameur W, Ksiaa M, Ben Slama A, Brahem A, Elleuch N, Jmaa A, Kort I, Jlass S, Benabderrahim S, Turki E, Belhaj A, Kebsi D, Ben Khelil M, Rmadi N, Gamaoun H, Alaya Youzbechi F, Brahim T, Boujnah S, Abid N, Gader N, Kalboussi S, Ben Sassi S, Loukil M, Ghrairi H, Ben Said N, Mrad O, Ferjaoui M, Hedhli L, Ben Kaab B, Berriche A, Charfi R, Mourali O, Smichi I, Bel Haj Kacem L, Ksentini M, Aloui R, Ferchichi L, Nasraoui H, Maoua M, Chérif F, Belil Y, Ayed MA, Alloulou Y, Belhadj S, Daghfous J, Mehiri N, Louzir B, Abbes A, Ghrab A, Chermiti A, Akacha A, Mejri O, Debbiche A, Yahiaoui C, Binous M, Tissaoui A, Mekni K, El Fekih C, Said MA, Chtioui S, Mestiri S, Smaoui H, Ben Hamida S, Haddar A, Mrizek N, Gares N, Zaibi A, Bouazizi N, Gallas S, Lachhab A, Belhadj M, Hadj Salem N, Garrouch A, Mezgar Z, Khrouf M, Abbassi H, Souissi D, Hamra I, Ben Mustapha N, Abessi I, Boubaker F, Bouchareb S, ElOmma Mrabet H, Touil I, Boussoffara L, Knani J, Boudawara N, Alaya W, Sfar MH, Fekih S, Snène H, Boudawara N, Gargouri I, Benzarti W, Knaz A, Abdelghani A, Aissa S, Hayouni A, Mejri I, Kacem M, Mhamdi S, Daboussi S, Aichaouia C, Moatemri Z, Chaachou A, Fsili R, Ben Ghezala H, Ben Jazia A, Brahmi N. 2022 TUNISIAN NATIONAL CONGRESS OF MEDICINE ABSTRACTS. Tunis Med 2023; 101:62-64. [PMID: 37682263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Indexed: 09/09/2023]
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Agnaou A, Mhaira W, Essalim R, Turino A, Ammar A, Zamama M, Alga M, Mauvy F. Structural study and ionic conductivity of Bi4V2−xSix/2Px/2O11−δ (0.0 ≤ x ≤ 0.5) compounds. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123730] [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: 11/19/2022]
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Chelly S, Maatouk A, Ammar A, Ezzi O, Omri N, Sahnoun M, Njah M, Mahjoub M. Utilisation et résistance des antibiotiques des infections associées aux soins. Rev Epidemiol Sante Publique 2022. [DOI: 10.1016/j.respe.2022.06.237] [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: 10/16/2022] Open
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Ammar A, Rhimi S, Ezzi O, Chelly S, Omri N, Mtira A, Mansour N, Mahjoub M. Etude du niveau de résilience chez les étudiants en médecine et ses facteurs associés. Rev Epidemiol Sante Publique 2022. [DOI: 10.1016/j.respe.2022.06.218] [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: 11/29/2022] Open
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Ammar A, Mtira A, Ezzi O, Chelly S, Rhimi S, Maatouk A, Bannour W, Njah M, Mahjoub M. Acceptabilité du vaccin contre le COVID-19 chez la population Tunisienne. Rev Epidemiol Sante Publique 2022. [PMCID: PMC9340433 DOI: 10.1016/j.respe.2022.06.217] [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: 10/29/2022] Open
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Krans NA, Ammar A, Nymark P, Willighagen EL, Bakker MI, Quik JTK. FAIR assessment tools: evaluating use and performance. NanoImpact 2022; 27:100402. [PMID: 35717894 DOI: 10.1016/j.impact.2022.100402] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 04/15/2022] [Accepted: 04/19/2022] [Indexed: 06/15/2023]
Abstract
Publishing research data using a findable, accessible, interoperable, and reusable (FAIR) approach is paramount to further innovation in many areas of research. In particular in developing innovative approaches to predict (eco)toxicological risks in (nano or advanced) material design where efficient use of existing data is essential. The use of tools assessing the FAIRness of data helps the future improvement of data FAIRness and therefore their re-use. This paper reviews ten FAIR assessment tools that have been evaluated and characterized using two datasets from the nanomaterials and microplastics risk assessment domain. The tools were grouped into four categories: online and offline self-assessment survey based, online (semi-) automated and other tools. We found that the online self-assessment tools can be used for a quick scan of a user's dataset due to their ease of use, little need for experience and short time investment. When a user is looking to assess full databases, and not just datasets, for their FAIRness, (semi-)automated tools are more practical. The offline assessment tools were found to be limited and unreliable due to a lack of guidance and an under-developed state. To further characterize the usability, two datasets were run through all tools to check the similarity in the tools' results. As most of the tools differ in their implementation of the FAIR principles, a large variety in outcomes was obtained. Furthermore, it was observed that only one tool gives recommendations to the user on how to improve the FAIRness of the evaluated dataset. This paper gives clear recommendations for both the user and the developer of FAIR assessment tools.
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Affiliation(s)
- N A Krans
- National Institute for Public Health and the Environment (RIVM), Centre for Safety of Substances and Products, Bilthoven, the Netherlands
| | - A Ammar
- Department of Bioinformatics-BiGCaT, NUTRIM, Maastricht University, Maastricht, the Netherlands.
| | - P Nymark
- Institute of Environmental Medicine, Karolinska Institute, 171 77 Stockholm, Sweden
| | - E L Willighagen
- Department of Bioinformatics-BiGCaT, NUTRIM, Maastricht University, Maastricht, the Netherlands
| | - M I Bakker
- National Institute for Public Health and the Environment (RIVM), Centre for Safety of Substances and Products, Bilthoven, the Netherlands
| | - J T K Quik
- National Institute for Public Health and the Environment (RIVM), Centre for Sustainability, Environment and Health, Bilthoven, the Netherlands
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Jemal M, Trabelsi K, Boukhris O, Ammar A, Clark C, Chtourou H. Sleep and daytime sleepiness in elite athletes and sedentary individuals. Sci Sports 2022. [DOI: 10.1016/j.scispo.2021.02.009] [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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Alim S, Ammar A, Yadav M, Rabbani S, Chawla S, Shama A, Haseen M. Subclavian artery thrombosis post modified radical mastectomy surgery - A rare case report. Indian J Vasc Endovasc Surg 2022. [DOI: 10.4103/ijves.ijves_135_21] [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: 11/11/2022] Open
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El Jirari I, El Baroudi A, Ammar A. Numerical Investigation of the Dynamical Behavior of a Fluid-Filled Microparticle Suspended in Human Arteriole. J Biomech Eng 2021; 143:1096958. [PMID: 33513223 DOI: 10.1115/1.4049955] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Indexed: 11/08/2022]
Abstract
The study of artificial microparticles (capsules and vesicles) has gained a growing interest with the emergence of bio-engineering. One of their promoting applications is their use as therapeutic vectors for drug delivery, when capsules and vesicles release their capacity in a targeted environment. The dynamic behavior of capsules and vesicles in confined or unbounded flows was widely studied in the literature and their mechanical response was truthfully described using constitutive laws with good agreement with experiences. However, in a context of biological application, to our knowledge, none of published studies investigating the mechanical response of deformable microparticle took into account the real physiological conditions: the rheological properties of blood such as carrying fluid and the mechanical properties of blood vessels. In this paper, we consider a hyperelastic microparticle suspended in human arteriole. We investigate the deformation of the microparticle resulting from its interaction with blood flow and the arteriolar wall using various capillary numbers and respecting physiological properties of blood and arterial wall. The influence of the blood viscosity model (Newtonian versus shear thinning) is investigated and a comparison with a rigid microchannel and a muscle-embedded arteriole is carried out. The fluid structure interaction (FSI) problem is solved using arbitrary Lagrangian Eulerian (ALE) method. Our simulations have revealed that the arteriolar wall distensibility deeply influences both the deformation and velocity of the microparticle: the deformation strongly increases while the velocity decreases in comparison to an infinitely rigid wall. In the context of therapeutic procedure of targeted drug-delivery, a particular attention should be addressed to these observations, in particular for their implication in the burst mechanism.
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Affiliation(s)
- I El Jirari
- LAMPA, Arts et Metiers Institute of Technology, HESAM University, Angers 49035, France
| | - A El Baroudi
- LAMPA, Arts et Metiers Institute of Technology, HESAM University, Angers 49035, France
| | - A Ammar
- LAMPA, Arts et Metiers Institute of Technology, HESAM University, Angers 49035, France
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Affiliation(s)
- A Ammar
- Department of Radiology B, Cochin Hospital, Assistance Publique-Hôpitaux de Paris, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France.
| | - J-L Drapé
- Department of Radiology B, Cochin Hospital, Assistance Publique-Hôpitaux de Paris, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France; Université de Paris, 75006 Paris, France
| | - M-P Revel
- Université de Paris, 75006 Paris, France; Department of Radiology A, Cochin Hospital, Assistance Publique-Hôpitaux de Paris, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France
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Bajunaid K, Alqurashi A, Alatar A, Alkutbi M, Alzahrani AH, Sabbagh AJ, Alobaid A, Barnawi A, Alferayan AA, Alkhani AM, Salamah AB, Sheikh BY, Alotaibi FE, Alabbas F, Farrash F, Al-Jehani HM, Alhabib H, Alnaami I, Altweijri I, Khoja I, Taha M, Alzahrani M, Bafaquh MS, Binmahfoodh M, Algahtany MA, Al-Rashed S, Raza SM, Elwatidy S, Alomar SA, Al-Issawi W, Khormi YH, Ammar A, Al-Habib A, Baeesa SS, Ajlan A. Neurosurgical Procedures and Safety During the COVID-19 Pandemic: A Case-Control Multicenter Study. World Neurosurg 2020; 143:e179-e187. [PMID: 32702490 PMCID: PMC7370909 DOI: 10.1016/j.wneu.2020.07.093] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Accepted: 07/14/2020] [Indexed: 12/20/2022]
Abstract
Objective Quantitative documentation of the effects of outbreaks, including the coronavirus disease 2019 (COVID-19) pandemic, is limited in neurosurgery. Our study aimed to evaluate the effects of the COVID-19 pandemic on neurosurgical practice and to determine whether surgical procedures are associated with increased morbidity and mortality. Methods A multicenter case-control study was conducted, involving patients who underwent neurosurgical intervention in the Kingdom of Saudi Arabia during 2 periods: pre-COVID-19 and during the COVID-19 pandemic. The surgical intervention data evaluated included diagnostic category, case priority, complications, length of hospital stay, and 30-day mortality. Results A total of 850 procedures were included, 36% during COVID-19. The median number of procedures per day was significantly lower during the COVID-19 period (5.5 cases) than during the pre-COVID-19 period (12 cases; P < 0.0001). Complications, length of hospital stay, and 30-day mortality did not differ during the pandemic. In a multivariate analysis comparing both periods, case priority levels 1 (immediate) (odds ratio [OR], 1.82; 95% confidence interval [CI], 1.24–2.67), 1 (1–24 h) (OR, 1.63; 95% CI, 1.10–2.41), and 4 (OR, 0.28; 95% CI, 0.19–0.42) showed significant differences. Conclusions During the early phase of the COVID-19 pandemic, the overall number of neurosurgical procedures declined, but the load of emergency procedures remained the same, thus highlighting the need to allocate sufficient resources for emergencies. More importantly, performing neurosurgical procedures during the pandemic in regions with limited effects of the outbreak on the health care system was safe. Our findings may aid in developing guidelines for acute and long-term care during pandemics in surgical subspecialties.
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Affiliation(s)
- Khalid Bajunaid
- Department of Surgery, Faculty of Medicine, University of Jeddah, Jeddah, Saudi Arabia; Department of Neurology and Neurosurgery, Montreal Neurological Institute and hospital, McGill University, Montreal, Quebec, Canada
| | - Ashwag Alqurashi
- Neurosurgery Division, Department of Surgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Abdullah Alatar
- Neurosurgery Division, Department of Surgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Mohammad Alkutbi
- Department of Neurosurgery, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Anas H Alzahrani
- Department of Surgery, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Abdulrahman J Sabbagh
- Division of Neurosurgery, Department of Surgery, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Abdullah Alobaid
- Department of Adult Neurosurgery, National Neuroscience Institute, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Abdulwahed Barnawi
- Department of Neurosurgery, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | | | - Ahmed M Alkhani
- Division of Neurosurgery, King Abdulaziz Medical City, Riyadh, Saudi Arabia
| | - Ali Bin Salamah
- Department of Neurosurgery, King Saud Medical City, Riyadh, Saudi Arabia
| | - Bassem Yousef Sheikh
- Vascular Endovascular and Skull Base Neurosurgery, College of Medicine, Taibah University, Madinah, Saudi Arabia
| | - Fahad E Alotaibi
- Department of Pediatric Neurosurgery, National Neuroscience institute, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Faisal Alabbas
- Department of Neurosurgery, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
| | - Faisal Farrash
- Department of Neuroscience, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Hosam M Al-Jehani
- Department of Neurology and Neurosurgery, Montreal Neurological Institute and hospital, McGill University, Montreal, Quebec, Canada; Department of Neurosurgery, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
| | - Husam Alhabib
- Department of Spine Surgery, Dr Sulaiman Alhabib Hospital, Khobar, Saudi Arabia
| | - Ibrahim Alnaami
- Division of Neurosurgery, Department of Surgery, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Ikhlass Altweijri
- Division of Neurosurgery, Department of Surgery, King Khalid University Hospital, Riyadh, Saudi Arabia
| | - Isam Khoja
- Department of Neurosurgery, International Medical Center, Jeddah, Saudi Arabia
| | - Mahmoud Taha
- Department of Neurosurgery, King Fahad specialist Hospital, Dammam, Saudi Arabia
| | - Moajeb Alzahrani
- Division of Neurosurgery, Department of Surgery, College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Jeddah, Saudi Arabia
| | - Mohammed S Bafaquh
- Department of Adult Neurosurgery, National Neuroscience Institute, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Mohammed Binmahfoodh
- Neurosciences Department, King Faisal Specialist Hospital and Research Center, Jeddah, Saudi Arabia
| | - Mubarak Ali Algahtany
- Division of Neurosurgery, Department of Surgery, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Sabah Al-Rashed
- Department of Neurosurgery, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Syed Muhammad Raza
- Department of Neurosurgery, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Sherif Elwatidy
- Neurosurgery Division, Department of Surgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Soha A Alomar
- Division of Neurosurgery, Department of Surgery, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Wisam Al-Issawi
- Department of Neurosurgery, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
| | - Yahya H Khormi
- Division of Neurosurgery, Department of Surgery, Faculty of Medicine, Jazan University, Jazan, Saudi Arabia
| | - Ahmad Ammar
- Department of Neurosurgery, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
| | - Amro Al-Habib
- Neurosurgery Division, Department of Surgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Saleh S Baeesa
- Division of Neurosurgery, Department of Surgery, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Abdulrazag Ajlan
- Neurosurgery Division, Department of Surgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
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Nesti M, De Sensi F, Malaczynska-Rajpold K, Arnold A, Mikhaylov EN, Garcia R, Ammar A, Waldmann V, Behar JM, Kosiuk J. P1449Anti-thrombotic management for electrophysiological procedures: results of the European Heart Rhythm Association (EHRA) young investigators survey. Europace 2020. [DOI: 10.1093/europace/euaa162.213] [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] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
none
Background
Electrophysiological studies (EPS), with or without ablation, require percutaneous introduction of catheters into the heart to record local electrical activity. Instrumentation of catheters within the blood causes activation of the clotting cascade, increasing the risk of thrombus formation. To date, the electrophysiological community lacks international guidelines on the use of anti-thrombotic therapies before, during and after EPS.
Purpose
To survey the current practice regarding the use of anti-thrombotic therapies across member countries of the European Heart Rhythm Association (EHRA).
Methods
The survey was conducted in February 2019. Electrophysiologists from EHRA member countries were contacted to complete the survey by e-mail, utilizing the EHRA Young EP network. They were asked to answer a questionnaire containing information on anti-thrombotic and anticoagulation management before, during and after left-sided EPS and ablation: atrial tachycardia (AT), accessory pathway (AP) and ventricular tachycardia (VT).
Results
We obtained 41 answers responses from 40 centers in 15 European EHRA member countries. Regarding of antiaggregation, the most used antiplatelet is aspirin (100% before, during and after ablation). The most used anticoagulant was novel oral anticoagulants (NOAC) before ablation (47.1%), during hospitalization (85.2%) and at discharge (70.3%). The administration of anti-thrombotic therapy depended on the procedure time only in 10 cases (24.4%).
For AP, before ablation, only 4 centers (9.7%) administered anti-platelets and 2 (4.9%) anticoagulants. During ablation, heparin was used by 85.4% of respondents maintaining ACT target 300-350 s in 36.6% of cases. At discharge, antiaggregation therapy was prescribed by 22 colleagues (53.7%) and anticoagulation only by one (2.4%).
In patients with AT, before ablation, antiaggregation prophylaxis was prescribed by only 4 centers (19.5%) and anticoagulation by 11 (26.8%). During procedure, almost all centers (40, 97.6%) used heparin with ACT target 300-350 s in 58.5% of cases. At discharge, antiplatelet therapy was recommended by 12 colleagues (29.3%) and anticoagulation by 24 (58.5%).
Regarding VT, before procedure, 8 centers (19.5%) prescribed antiaggregation and 5 (12.2%) anticoagulation prophylaxis. During ablation, all centers used heparin, maintaining ACT target 300-350 s in 58% of cases. The use of antiaggregation or anticoagulation depended on the left ventricle (LV) access in 15 centers (37.5%) and on LV ejection fraction in 11 (26.8%). At discharge, anti-thrombotic therapy was recommended by 16 colleagues (39%) and anticoagulation by 13 (31.7%).
Conclusion
Our survey showed that there is considerable variation in the management of anti-thrombotic therapy surrounding left-sided EPS and ablation. Further studies are necessary to evaluate the right approach to these procedures.
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Affiliation(s)
- M Nesti
- San Donato Hospital of Arezzo, Arezzo, Italy
| | | | - K Malaczynska-Rajpold
- Royal Brompton and Harefield NHS Foundation Trust, London, United Kingdom of Great Britain & Northern Ireland
| | - A Arnold
- National Heart and Lung Institute, London, United Kingdom of Great Britain & Northern Ireland
| | - E N Mikhaylov
- Almazov National Medical Research Centre, Saint Petersburg, Russian Federation
| | - R Garcia
- University of Poitiers, Poitiers, France
| | - A Ammar
- Barts Heart Centre, London, United Kingdom of Great Britain & Northern Ireland
| | - V Waldmann
- GEORGES POMPIDOU APHP SITE OF PARIS OUEST UNIVERSITY HOSPITAL, Paris, France
| | - J M Behar
- Royal Brompton and Harefield NHS Foundation Trust, Helios Clinic Köthen, London, United Kingdom of Great Britain & Northern Ireland
| | - J Kosiuk
- Heart Center of Leipzig, Leipzig, Germany
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Mund MD, Riaz M, Mirza MA, Rahman ZU, Mahmood T, Ahmad F, Ammar A. Effect of dietary tryptophan supplementation on growth performance, immune response and anti-oxidant status of broiler chickens from 7 to 21 days. Vet Med Sci 2019; 6:48-53. [PMID: 31691503 PMCID: PMC7036307 DOI: 10.1002/vms3.195] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Background This study was conducted to investigate the optimum dietary level of tryptophan (Trp) supplementation at which broiler chickens have better growth with efficient immune system and anti‐oxidant status. Method One hundred and twenty (n = 120) 1‐day‐old broiler chicks were fed a common commercial diet from days 1 to 7. On day 7, the chicks were randomly divided in three treatment groups, that is, Trp 0.2 [national research council (NRC) recommended level of tryptophan], Trp 0.3 (tryptophan supplemented at 0.3%) and Trp 0.5 (tryptophan supplemented at 0.5%). All the experimental diets were iso‐caloric (ME; 3,000 kcal/kg) and iso‐proteic (CP; 18.5%). Weekly data on feed intake and body weight gain (BWG) were recorded to calculate feed conversion ratio (FCR). On day 19, avian tuberculin was injected to note the cellular immunity. On day 21, two birds per replicate were killed to determine carcass and visceral organ weights. Blood serum samples were collected for analysis of humoral immune response against sheep red blood cells, total oxidant and anti‐oxidants by spectrophotometric method. Results Feed intake, carcass and visceral organ weights remained unaffected by dietary treatments while BWG and FCR tended to improve (p < .05) in broiler chicks fed the Trp 0.3 and the Trp 0.5 diets. Total oxidant status was also improved (p < .05) in broiler chicks fed the Trp 0.5 diet. Likewise, broiler chicks fed the Trp 0.3 and the Trp 0.5 diets tended to have better (p < .05) total anti‐oxidant status, catalase, glutathione peroxidase, glutathione reductase and arylesterase (ARE). The overall antibodies response and IgG improved (p < .05) by the Trp 0.3 and Trp 0.5 diets compared to control. However, IgM level remained similar across the treatment. The cellular immunity against avian tuberculin improved at 24 hr post‐injection but its effect disappeared at 48 hr. Conclusion The results of present study revealed that Trp above the NRC recommended level may give better growth, immune response and anti‐oxidant status in broiler chickens.
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Affiliation(s)
- Muhammad D Mund
- Institute of Animal and Dairy Sciences, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Muhammad Riaz
- Institute of Animal and Dairy Sciences, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Muhammad A Mirza
- Institute of Animal and Dairy Sciences, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Zia-Ur Rahman
- Institute of Pharmacy, Physiology and Pharmacology, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Tahir Mahmood
- Institute of Animal and Dairy Sciences, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Fawad Ahmad
- Institute of Animal and Dairy Sciences, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Ahmad Ammar
- Institute of Animal and Dairy Sciences, University of Agriculture Faisalabad, Faisalabad, Pakistan
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Ammar A, Al-Daydamony MM, Amin MI, Nagieb AM, Ammar MAS. P955Assessment of coronary and myocardial reperfusion as well as left ventricular infarct size and function following streptokinase administration immediately after Primary coronary intervention. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0549] [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
Reperfusion injury might be considered a consequence of insufficient myocardial perfusion (MP) due to microthrombi (MT) embolization into the microcirculation. Streptokinase (SK) a fibrinolytic agent, if injected into the culprit artery immediately after primary percutaneous coronary intervention (PPCI) might tackle and dissolve these MT resulting in better MP and function.
Methods
Sixty four patients presenting within 24 hours by their first ST elevation myocardial infarction, underwent PPCI, then equally divided into 2 groups; G1 received 250 kU of intracoronary SK (ICSK) vs saline in G2. Successful coronary perfusion was defined as corrected TIMI frame count (cTFC) <28 frames, and successful MP as TIMI myocardial blush grade (TMBG) 3. Evaluation of left ventricular (LV) function was done by comparing the baseline LV global longitudinal strain (GLS) before and 1-month after PPCI. Assessment of infarct size was done by measuring peak CK-MB, CK-MB area under the curve and ST segment resolution (STR) 90 min after PPCI.
Results
Thirty minutes after ICSK, cTFC (fig) was significantly lower (P≤0.05), while TMBG (fig) was significantly higher (P≤0.02) in G1 vs G2. Peak CK-MB, CK-MB area under the curve were significantly lower (P≤0.015 & P≤0.001 respectively) while STR≥70%was significantly higher in G1 (P≤0.045). Multivariate logistic regression analysis showed that the likelihood of achieving successful MP post-PPCI is associated with ICSK administration [OR=0.123, 95% CI (0.02–0.75), P≤0.024] and total ischemic time (ROC curve). Multivariate linear regression analysis showed that each of, immediate ICSK administration post-PPCI and TMBG were independent predictors for LV GLS improvement after one month. No significant difference in bleeding risk between G1&2 (p=1).
Conclusion
ICSK given immediately after primary PCI was an independent predictor of successful coronary and myocardial reperfusion. It significantly led to reduction of infarct size and improvement of LV GLS.
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Affiliation(s)
- A Ammar
- Zagazig University, Cardiology, Zagazig, Egypt
| | | | - M I Amin
- Zagazig University, Cardiology, Zagazig, Egypt
| | - A M Nagieb
- Zagazig University, Cardiology, Zagazig, Egypt
| | - M A S Ammar
- Zagazig University, Cardiology, Zagazig, Egypt
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Ammar A, Chtourou H, Hammouda O, Turki M, Ayedi F, Kallel C, AbdelKarim O, Hoekelmann A, Souissi N. Relationship between biomarkers of muscle damage and redox status in response to a weightlifting training session: effect of time-of-day. Physiol Int 2019. [PMID: 28639862 DOI: 10.1556/036.103.2016.2.11] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The aims of the present study were to: (1) investigate the effect of a weightlifting training session and time-of-day (TOD) upon biological parameters (i.e., oral temperature, hematological, C-reactive protein (CRP), and oxidative stress) and (2) assess their possible link with muscle damage responses. Nine weightlifters (21 ± 0.5 years) performed, in a randomized order, three Olympic-Weightlifting sessions (i.e., at 08:00, 14:00, and 18:00). Blood samples were collected at rest, 3 min and 48 h after each training session. Between pre- and post-training session, ANOVA showed significant increases in oxidative stress markers at the three TODs (p < 0.01) and significant increases for creatine kinase (CK) and lactate dehydrogenase (LDH) only at 08:00 and 18:00 (p < 0.05). At rest, the results showed a significant diurnal variation for the majority of the selected parameters except for malondialdehyde (MDA), total bilirubin, and CRP with higher values observed at 18:00 (p < 0.05). After the training session, given the higher rate of increase during the morning session, these diurnal variations persisted for temperature and WBC (p < 0.01) and were suppressed for CK, LDH, uric acid (UA), catalase, and glutathione peroxidase. The main significant correlations (p < 0.001) were observed between: (1) CK and MDA (r = 0.6) and CK and UA (r = 0.66 and r = 0.82) during the morning and evening training sessions; (2) CK and CRP only during the morning session (r = 0.5); and (3) CRP and WBC during the three training sessions (r = 0.8). In conclusion, the present findings: (1) confirm that the muscle damage responses could be induced by a high level of oxidative stress and (2) suggest to avoid scheduling training sessions in the morning given the higher muscle damage, inflammatory, and oxidative responses at this TOD.
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Affiliation(s)
- A Ammar
- Research Unit: Education, Motricity, Sport and Health, High Institute of Sport and Physical Education of Sfax, Sfax University , Sfax, Tunisia.,Institute of Sport Science, Otto-von-Guericke-University Magdeburg , Magdeburg, Germany
| | - H Chtourou
- Research Unit: Education, Motricity, Sport and Health, High Institute of Sport and Physical Education of Sfax, Sfax University , Sfax, Tunisia.,High Institute of Sport and Physical Education of Sfax, Sfax University , Sfax, Tunisia
| | - O Hammouda
- Research Center on Sport and Movement (CeRSM, EA 2931), Sciences and Techniques of the Physical and Sporting Activities (UFR STAPS), University of Paris Ouest Nanterre La Defense , Nanterre, France
| | - M Turki
- Laboratory of Biochemistry, CHU Habib Bourguiba, Sfax University , Sfax, Tunisia
| | - F Ayedi
- Laboratory of Biochemistry, CHU Habib Bourguiba, Sfax University , Sfax, Tunisia
| | - C Kallel
- Laboratory of Hematology, CHU Habib Bourguiba, Sfax University , Sfax, Tunisia
| | - O AbdelKarim
- Institute of Sport Science, Otto-von-Guericke-University Magdeburg , Magdeburg, Germany
| | - A Hoekelmann
- Institute of Sport Science, Otto-von-Guericke-University Magdeburg , Magdeburg, Germany
| | - N Souissi
- National Sport Observatory , Tunis, Tunisia
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Savini C, Coppola G, Murana G, Ammar A, Suarez SM, Costantino A, Votano D, Coco VL, Pacini D, Di Bartolomeo R. EP24 MITRAL VALVE REPAIR AND EVOLUTION OF TECHNIQUES. J Cardiovasc Med (Hagerstown) 2018. [DOI: 10.2459/01.jcm.0000549953.55218.c6] [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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Ghali H, Ben Rejeb O, Bouafia N, Ammar A, Njah M, Ernez S, Mahdhaoui A, Jeridi G. Incidence and risk factors of peripheral venous catheter-related adverse events in cardiology department of a Tunisian university hospital: A prospective observational study. Ann Cardiol Angeiol (Paris) 2018; 68:207-214. [PMID: 30293799 DOI: 10.1016/j.ancard.2018.08.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 08/23/2018] [Indexed: 10/28/2022]
Abstract
AIM The purpose of our study was to determine the incidence and risk factors of Peripheral Venous Catheter-Related Adverse Events (PVCAEs) in a cardiology department of a university hospital. PATIENTS AND METHODS We carried out a prospective observational study from Mars 2017 to May 2017 in the cardiology department of the University Hospital of Farhat Hached in Sousse, Tunisia. During this period, we actively followed-up all inserted PVCs (every 12hours) from insertion up to 48hours after removal. Regression analyses were applied and significance limits were set at P<0.05. RESULTS Data were analysed for 210 PVCs (794 PVC-days) in 148 patients. The incidence of PVCAEs was 33.33% with density of incidence of 8.81/1000 PVC-days. PVCAEs were mainly pain (50%) and mechanical events (31.42%). Infections accounted for 11.42%. The most frequent mechanical PVCAEs, was haematoma (15.71%). Multivariate analysis revealed as independent factors for the occurrence of PVCAEs: the hydro electrolytic nature of the injected product (OR=13.42, P<10-3), the medicinal nature of the injected product (OR=5.08, P=0.003), bad cutaneous state (OR=8.08, P=0.003), admission during nightshift (OR=3.76; P=0.014) and advanced age (OR=1.04, P=0.042). CONCLUSION Multicenter studies would be very useful to better analyze risk factors associated with PVCAEs.
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Affiliation(s)
- H Ghali
- Infection Prevention and Control Department, University Hospital Farhat Hached, Faculty of Medecine of Sousse, University of Sousse, Tunisia.
| | - O Ben Rejeb
- Department of Cardiology, University Hospital Farhat Hached, Faculty of Medecine of Sousse, University of Sousse, Tunisia; Research Laboratory LR14ES05, Interactions of the Cardiopulmonary System, Faculty of Medicine of Sousse, University of Sousse, Tunisia.
| | - N Bouafia
- Infection Prevention and Control Department, University Hospital Farhat Hached, Faculty of Medecine of Sousse, University of Sousse, Tunisia; Infection Control Consultant, King Faycal Medical Complex, Taif, Saudi Arabia.
| | - A Ammar
- Infection Prevention and Control Department, University Hospital Farhat Hached, Faculty of Medecine of Sousse, University of Sousse, Tunisia.
| | - M Njah
- Infection Prevention and Control Department, University Hospital Farhat Hached, Faculty of Medecine of Sousse, University of Sousse, Tunisia.
| | - S Ernez
- Department of Cardiology, University Hospital Farhat Hached, Faculty of Medecine of Sousse, University of Sousse, Tunisia.
| | - A Mahdhaoui
- Department of Cardiology, University Hospital Farhat Hached, Faculty of Medecine of Sousse, University of Sousse, Tunisia; Research Laboratory LR14ES05, Interactions of the Cardiopulmonary System, Faculty of Medicine of Sousse, University of Sousse, Tunisia.
| | - G Jeridi
- Department of Cardiology, University Hospital Farhat Hached, Faculty of Medecine of Sousse, University of Sousse, Tunisia; Research Laboratory LR14ES05, Interactions of the Cardiopulmonary System, Faculty of Medicine of Sousse, University of Sousse, Tunisia.
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Badr W, Ghammam R, Maatoug J, Ammar A, Ben Fredj S, Ghannem H. Prévalence de l’obésité et du surpoids chez les adolescents et association avec les facteurs de risques comportementaux Sousse, Tunisie 2016. Annales d'Endocrinologie 2018. [DOI: 10.1016/j.ando.2018.06.1028] [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] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ammar A, Mahmoud K, Kasemy Z. Effect of adding midazolam to bupivacaine during rectus sheath block: a randomised controlled trial. Acta Anaesthesiol Scand 2018; 62:857-862. [PMID: 29446060 DOI: 10.1111/aas.13090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 01/08/2018] [Accepted: 01/24/2018] [Indexed: 12/01/2022]
Abstract
BACKGROUND Various adjuvants have been tried to improve quality and increase duration of local anaesthetics during various nerve blocks. We aimed to evaluate the effect of adding midazolam to bupivacaine on rectus sheath (RS) block in patients undergoing umbilical or epigastric hernia repair. METHODS In all, 60 adult patients were divided into two equal groups, each group included 30 patients. Group I received 20 ml of bupivacaine hydrochloride 0.25% + midazolam 50 μg/kg in 2 ml saline 0.9% (Midazolam group, n = 30), whereas Group II received 20 ml of bupivacaine hydrochloride 0.25% + 2 ml saline (Control group, n = 30) for RS block on each side. The primary outcome was post-operative 48 h morphine consumption, whereas secondary outcomes included analgesia duration, post-operative pain, as evaluated by visual analogue scale (VAS) for pain scoring at 1, 2, 6, 12, 24 and 48 h post-operatively, reported post-operative nausea and or vomiting (PONV), somnolence or any adverse drug reactions. RESULTS The current study showed that addition of midazolam to bupivacaine for RS blockade provided good analgesia as evidenced by a statistically significant less morphine consumption in the post-operative 48 h [11.2 (5.3-18.3) vs. 25.9 (15.2-31.0) mg, P = 0.002], longer duration of analgesia, lower VAS during post-operative 48 h, lower incidence of PONV, somnolence and pruritus. CONCLUSION Midazolam addition to bupivacaine for RS blockade provided adjuvant analgesia as supported by less morphine consumption, longer duration of analgesia, and lower VAS score.
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Affiliation(s)
- A. Ammar
- Department of Anaesthesiology; Minoufiya Faculty of Medicine; Minoufiya University; Shebin Elkoam Egypt
| | - K. Mahmoud
- Department of Anaesthesiology; Minoufiya Faculty of Medicine; Minoufiya University; Shebin Elkoam Egypt
| | - Z. Kasemy
- Department of Public Health, Statistics and Community Medicine; Minoufiya Faculty of Medicine; Minoufiya University; Shebin Elkoam Egypt
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Ahmad A, Ammar A, Bendary M, Abd El-Aziz N, Abd El-Hamid M, El-mowalid G. Phenogenotyping of Closely Related Methicillin Resistant Staphylococcus aureus Isolated from Milk and Meat Products. Zagazig Veterinary Journal 2017; 45:394-403. [DOI: 10.21608/zvjz.2017.7870] [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: 09/01/2023]
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Ammar A, Mahmoud K, Elkersh A, Kasemy Z. A randomised controlled trial comparing the effects of propofol with isoflurane in patients with diastolic dysfunction undergoing coronary artery bypass graft surgery. Anaesthesia 2016; 71:1308-1316. [DOI: 10.1111/anae.13564] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2016] [Indexed: 11/28/2022]
Affiliation(s)
- A. Ammar
- Statistics and Community Medicine; Minoufiya Faculty of Medicine; Shebin Elkoam Egypt
| | - K. Mahmoud
- Statistics and Community Medicine; Minoufiya Faculty of Medicine; Shebin Elkoam Egypt
| | - A. Elkersh
- Statistics and Community Medicine; Minoufiya Faculty of Medicine; Shebin Elkoam Egypt
| | - Z. Kasemy
- Statistics and Community Medicine; Minoufiya Faculty of Medicine; Shebin Elkoam Egypt
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Manzoor SA, Mirza SN, Zubair M, Nouman W, Hussain SB, Mehmood S, Irshad A, Sarwar N, Ammar A, Iqbal MF, Asim A, Chattha MU, Chattha MB, Zafar A, Abid R. Estimating genetic potential of biofuel forest hardwoods to withstand metal toxicity in industrial effluent under dry tropical conditions. Genet Mol Res 2015; 14:9543-54. [PMID: 26345887 DOI: 10.4238/2015.august.14.17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Biofuel tree species are recognized as a promising alternative source of fuel to conventional forms. Additionally, these tree species are also effective in accumulating toxic heavy metals present in some industrial effluents. In developing countries such as Pakistan, the use of biofuel tree species is gaining popularity not only for harvesting economical and environmentally friendly biofuel, but also to sequester poisonous heavy metals from industrial wastewater. This study was aimed at evaluating the genetic potential of two biofuel species, namely, Jatropha curcas and Pongamia pinnata, to grow when irrigated with industrial effluent from the Pak-Arab Fertilizer Factory Multan, Southern Punjab, Pakistan. The growth performances of one-year-old seedlings of both species were compared in soil with adverse physiochemical properties. It was found that J. curcas was better able to withstand the toxicity of the heavy metals present in the fertilizer factory effluent. J. curcas showed maximum gain in height, diameter, and biomass production in soil irrigated with 75% concentrated industrial effluent. In contrast, P. pinnata showed a significant reduction in growth in soil irrigated with more than 50% concentrated industrial effluent, indicating that this species is less tolerant to higher toxicity levels of industrial effluent. This study identifies J. curcas as a promising biofuel tree species that can be grown using industrial wastewater.
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Affiliation(s)
- S A Manzoor
- Department of Forestry, Range and Wildlife Management, Bahaudddin Zakariya University, Multan, Punjab, Pakistan
| | - S N Mirza
- Department of Forestry & Range Management, Pir Mehar Ali Shah-Arid Agriculture University, Rawalpindi, Punjab, Pakistan
| | - M Zubair
- Department of Forestry, Range and Wildlife Management, Bahaudddin Zakariya University, Multan, Punjab, Pakistan
| | - W Nouman
- Department of Forestry, Range and Wildlife Management, Bahaudddin Zakariya University, Multan, Punjab, Pakistan
| | - S B Hussain
- Department of Plant Breeding & Genetics, Bahaudddin Zakariya University, Multan, Punjab, Pakistan
| | - S Mehmood
- Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan, Punjab, Pakistan
| | - A Irshad
- Regional Agricultural Research Institute Bahawalpur, Punjab, Pakistan
| | - N Sarwar
- Department of Agronomy, Bahauddin Zakariya University, Multan, Punjab, Pakistan
| | - A Ammar
- Regional Agricultural Research Institute Bahawalpur, Punjab, Pakistan
| | - M F Iqbal
- Department of Soil Science, Bahauddin Zakariya University, Multan, Punjab, Pakistan
| | - A Asim
- Department of Horticulture, Bahauddin Zakariya Univeristy, Multan, Punjab, Pakistan
| | - M U Chattha
- Department of Agronomy, University of Agriculture Faisalabad, Punjab, Pakistan
| | - M B Chattha
- Institute of Agricultural Sciences, Punjab University, Lahore, Pakistan
| | - A Zafar
- Regional Agricultural Research Institute Bahawalpur, Punjab, Pakistan
| | - R Abid
- Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan, Punjab, Pakistan
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Aboshora W, Lianfu Z, Dahir M, Qingran M, Qingrui S, Jing L, Al-Haj NQM, Ammar A. Effect of Extraction Method and Solvent Power on Polyphenol and Flavonoid Levels in Hyphaene Thebaica L Mart ( Arecaceae) (Doum) Fruit, and its Antioxidant and Antibacterial Activities. TROP J PHARM RES 2015. [DOI: 10.4314/tjpr.v13i12.16] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [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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Ammar A, Abd El-Razik M. QUALITY CHARACTERISTICS OF GLUTEN FREE CAKE PRODUCED FROM CASSAVA, PUMPKIN AND POTATO FLOURS. Journal of Food and Dairy Sciences 2013; 4:401-412. [DOI: 10.21608/jfds.2013.72081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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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Aslam M, Ali A, Taj T, Badar N, Mirza W, Ammar A, Muzaffar S, Kauten JR. Specialty choices of medical students and house officers in Karachi, Pakistan. East Mediterr Health J 2011; 17:74-79. [PMID: 21735806] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Unerstanding patterns of career choices inmedicine is importnat for educators and policy-makers to plan the supply of specialists. This study analysed the career choices made by medical students and house officers in 2 private and 2 public medical schools in Karachi, Pakistan. An anonymous, self-administered and gynaecology were the 4 highest ranked specialties, with internal medicine ranked top as both the 1st and 2nd choice. Internal medicine was the 1st choice for significantly more students in public than private medical colleges (22.2% versus 1l4.9%). Students from private medical institutions chose a wider range of specialties than those from publicly-funded colleges. A high proportion of medical students and graduates in Karachi favour the same medical specialties, which may lead to saturation in those areas of specialization.
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Affiliation(s)
- M Aslam
- Department of Research, Dow University of Health Sciences, Karachi, Pakistan.
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Aslam M, Ali A, Taj T, Badar N, Mirza W, Ammar A, Muzaffar S, Kauten J. Specialty choices of medical students and house officers in Karachi, Pakistan. East Mediterr Health J 2011. [DOI: 10.26719/2011.17.1.74] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ahlskog JKJ, Schliemann C, Mårlind J, Qureshi U, Ammar A, Pedley RB, Neri D. Human monoclonal antibodies targeting carbonic anhydrase IX for the molecular imaging of hypoxic regions in solid tumours. Br J Cancer 2009; 101:645-57. [PMID: 19623173 PMCID: PMC2736829 DOI: 10.1038/sj.bjc.6605200] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Background: Hypoxia, which is commonly observed in areas of primary tumours and of metastases, influences response to treatment. However, its characterisation has so far mainly been restricted to the ex vivo analysis of tumour sections using monoclonal antibodies specific to carbonic anhydrase IX (CA IX) or by pimonidazole staining, after the intravenous administration of this 2-nitroimidazole compound in experimental animal models. Methods: In this study, we describe the generation of high-affinity human monoclonal antibodies (A3 and CC7) specific to human CA IX, using phage technology. Results: These antibodies were able to stain CA IX ex vivo and to target the cognate antigen in vivo. In one of the two animal models of colorectal cancer studied (LS174T), CA IX imaging closely matched pimonidazole staining, with a preferential staining of tumour areas characterised by little vascularity and low perfusion. In contrast, in a second animal model (SW1222), distinct staining patterns were observed for pimonidazole and CA IX targeting. We observed a complementary pattern of tumour regions targeted in vivo by the clinical-stage vascular-targeting antibody L19 and the anti-CA IX antibody A3, indicating that a homogenous pattern of in vivo tumour targeting could be achieved by a combination of the two antibodies. Conclusion: The new human anti-CA IX antibodies are expected to be non-immunogenic in patients with cancer and may serve as broadly applicable reagents for the non-invasive imaging of hypoxia and for pharmacodelivery applications.
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Affiliation(s)
- J K J Ahlskog
- Department of Chemistry and Applied Biosciences, ETH Zürich, Wolfgang-Pauli-Strasse 10, Zurich CH-8093, Switzerland
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Ammar A, Surmann P. Improvement of the etodolac purity test by reversed phase high-performance liquid chromatography. Pharmazie 2008; 63:913-914. [PMID: 19177910] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The resolution of etodolac by reversed phase HPLC applied in the European Pharmacopeia (EP) was found to be greatly affected by using methanol as the injection solvent and the system of gradient elution, which leads to peak broadening as well as poor separation of etodolac from the impurities such as 2-(7-ethylindol-3-yl) ethanol respectively. Changing the type of injection solvent (methanol) by the mobile phase, which is a mixture of methanol, buffer (KH2PO4, PH = 7), and acetonitril as well as monitoring the gradient program (increasing the polarity) leads to enhance the selectivity and efficiency of the analysis of etodolac by eliminating the peak broadening and markedly improving the separation of etodolac from 2-(7-ethylindol-3-yl) ethanol. The method was validated by parameters such as selectivity, repeatability, and intermediate precision.
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Affiliation(s)
- A Ammar
- Institute of Pharmaceutical Chemistry, Free University of Berlin, Berlin, Germany
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Ammar A, Mohammed R, Salmi M, Pepper M, Paish EC, Ellis I, Patel P, Martin SG. Role of CLEVER-1 in breast cancer metastasis. Breast Cancer Res 2008. [PMCID: PMC3300738 DOI: 10.1186/bcr1919] [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: 11/10/2022] Open
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Wicklund AH, Ammar A, Weitlauf JC, Heilbronner RL, Fink J, Lee RC, Kelley K, Pliskin NH. MMPI-2 Patterns in Electrical Injury: A Controlled Investigation. Clin Neuropsychol 2008; 22:98-111. [DOI: 10.1080/13825580601025924] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Nergårdh R, Ammar A, Brodin U, Bergström J, Scheurink A, Södersten P. Neuropeptide Y facilitates activity-based-anorexia. Psychoneuroendocrinology 2007; 32:493-502. [PMID: 17467917 DOI: 10.1016/j.psyneuen.2007.03.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [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: 08/28/2006] [Revised: 03/02/2007] [Accepted: 03/03/2007] [Indexed: 10/23/2022]
Abstract
The hypothesis that treatment with neuropeptide Y (NPY) can increase running activity and decrease food intake and body weight was tested. Female rats with a running wheel lost more weight than sedentary rats and ran progressively more as the availability of food was gradually reduced. When food was available for only 1h/day, the rats lost control over body weight. Correlatively, the level of NPY mRNA was increased in the hypothalamic arcuate nucleus. This phenomenon, activity-based-anorexia, was enhanced by intracerebroventricular infusion of NPY in rats which had food available during 2h/day. By contrast, NPY stimulated food intake but not wheel running in rats which had food available continuously. These findings are inconsistent with the prevailing theory of the role of the hypothalamus in the regulation of body weight according to which food intake is a homeostatic process controlled by "orexigenic" and "anorexigenic" neural networks. However, the finding that treatment with NPY, generally considered an "orexigen", can increase physical activity and decrease food intake and cause a loss of body weight is in line with the clinical observation that patients with anorexia nervosa are physically hyperactive and eat only little food despite having depleted body fat and up-regulated hypothalamic "orexigenic" peptides.
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Affiliation(s)
- R Nergårdh
- Section of Molecular Neuropharmacology, Department of Physiology and Pharmacology, Karolinska Institutet, S-171 77 Stockholm, Sweden
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Ammar A, El Hammami S, Souissi Z, Chtourou A. [A rare tumor of the thoracic wall: solitary malignant fibrous tumor]. Rev Pneumol Clin 2007; 63:65-6. [PMID: 17457289 DOI: 10.1016/s0761-8417(07)90094-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
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Jerbi M, Hidar S, Ammar A, Khairi H. Predictive factors of vaginal birth after cesarean delivery. Int J Gynaecol Obstet 2006; 94:43-4. [PMID: 16730010 DOI: 10.1016/j.ijgo.2006.03.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2006] [Revised: 03/23/2006] [Accepted: 03/29/2006] [Indexed: 11/24/2022]
Affiliation(s)
- M Jerbi
- Obstetrics and Gynaecology Department, F. Hached University Teaching Hospital, Tunisia.
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Abstract
Many radiosensitizers are in current clinical use. In addition, a myriad of potential new targeted therapies, which may also interact with radiation, are in clinical development. The clinical utility of new targeted therapies, in combination with existing radiation sensitizers (chemotherapies) requires further evaluation, as does the understanding of their acute and late radiation effects. Free radical scavengers appear to show promise as radioprotectors, but data for mucoprotection are less convincing.
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Affiliation(s)
- C T Thomas
- Department of Radiation Oncology, David Geffen School of Medicine at University of California Los Angeles, 200 Medical Plaza, Suite B265, Los Angeles, CA 90095, USA
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Belhabib D, Maalej S, Hantous S, Ammar A, Hassene H, Fenniche S, Boughnim L, Megdiche ML. [Pleural effusion revealing multiple myeloma]. Rev Pneumol Clin 2005; 61:319-22. [PMID: 16292159 DOI: 10.1016/s0761-8417(05)84848-5] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Pleural effusion is rarely observed in multiple myeloma, its frequence is estimated at 6%, and its myelomatous origin occurs in only 1% of the cases. It is exceptionally the first sign of multiple myeloma. We report two cases of IgA and IgG multiple myeloma revealed by pleural effusion. The first case was a 61-year-old woman who developed pleural effusion with a bone endobronchial and pericardial location of multiple myeloma; the second case was a 65-year-old man who had isolated pleural effusion. These pleural effusions were found to be caused by myeloma and were verified by the presence of the same monoclonal immunoglobulin in both plasma and pleural liquid. Atypical plasma cells were found in the pleural fluid.
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Affiliation(s)
- D Belhabib
- Service Ibn Nafis, Hôpital de Pneumo-Phtisiologie Abderrahman-Mami, 2080 L'Ariana/Tunis, Tunisie.
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Alga M, Ammar A, Tanouti B, Outzourhit A, Mauvy F, Decourt R. Effect of Niobium doping on structural, thermal, sintering and electrical properties of Bi4V1.8Cu0.2O10.7. J SOLID STATE CHEM 2005. [DOI: 10.1016/j.jssc.2005.06.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Garvey J, Joyce MR, Khan F, Ammar A, Connolly CE, Cormican MR, McAnena O. Axillary lymphadenopathy secondary to cat-scratch disease. Ir Med J 2005; 98:243-4. [PMID: 16255119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
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Abstract
The clinical application of islet transplantation is limited due to the limited source and the morbidity of systemic immunosuppression to prevent rejection. The two problems can be solved by using encapsulated islets. We have used amniotic membranes as biocompatible natural immune barriers. The objective of this study was to assess the revascularization of the membrane, which is necessary to ensure islet viability when the membrane is used for islet encapsulation. The amniotic membranes, obtained from full-term pregnant female dogs, were molded to form macrocapsules, which were implanted in the peritoneal cavity. The capsules were removed after 3, 10, 15, and 30 days and examined histopathologically using hematoxylin and eosin and by immunohistochemistry for neovascularization using factor VIII to detect angiogenesis. Upon histopathological examination, all specimens showed localized, moderate inflammation and congested blood vessels with no thrombosis or rejection. There was a mild degree of fibroblast proliferation starting from day 10 to day 30. Immunohistochemical staining revealed that the number of blood vessels was 7, 11, 13, 10 per high-power microscopic field on days 3, 10, 15, and 30, respectively. We concluded from this study that implanted amniotic sac capsules were vascularized within the omental tissue from day 10 on with significant blood vessel formation starting on day 3 by immunohistochemical study.
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Affiliation(s)
- M A Mahgoub
- Pancreatic Islet Transplantation and Diabetes Research Unit, Ain Shams University Hospital, Cairo, Egypt.
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Ammar A, Ménétrier M, Villesuzanne A, Matar S, Chevalier B, Etourneau J, Villeneuve G, Rodríguez-Carvajal J, Koo HJ, Smirnov AI, Whangbo MH. Investigation of the Electronic and Structural Properties of Potassium Hexaboride, KB6, by Transport, Magnetic Susceptibility, EPR, and NMR Measurements, Temperature-Dependent Crystal Structure Determination, and Electronic Band Structure Calculations. Inorg Chem 2004; 43:4974-87. [PMID: 15285674 DOI: 10.1021/ic049444c] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The electronic and structural properties of potassium hexaboride, KB(6), were examined by transport, magnetic susceptibility, EPR, and NMR measurements, temperature-dependent crystal structure determination, and electronic band structure calculations. The valence bands of KB(6) are partially empty, but the electrical resistivity of KB(6) reveals that it is not a normal metal. The magnetic susceptibility as well as EPR and NMR measurements show the presence of localized electrons in KB(6). The EPR spectra of KB(6) have two peaks, a broad ( approximately 320 G) and a narrow (less than approximately 27 G) line width, and the temperature-dependence of the magnetic susceptibility of KB(6) exhibits a strong hysteresis below 70 K. The temperature-dependent crystal structure determination of KB(6) shows the occurrence of an unusual variation in the unit cell parameter hence supporting that the hysteresis of the magnetic susceptibility is a bulk phenomenon. The line width DeltaH(pp) of the broad EPR signal is independent of temperature and EPR frequency. This finding indicates that the line broadening results from the dipole-dipole interaction, and the spins responsible for the broad EPR peak has the average distance of approximately 1.0 nm. To explain these apparently puzzling properties, we examined a probable mechanism of electron localization in KB(6) and its implications.
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Affiliation(s)
- A Ammar
- Institut de Chimie de la Matière Condensée de Bordeaux, ICMCB-CNRS, 87 Avenue du Dr. A. Schweitzer, 33608 Pessac Cedex, France
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Maalej S, Belhabib D, Hantous S, Fenniche S, Ammar A, Hammami S, Megdiche ML. [Costo-vertebral hydatid disease: the role of MRI]. Rev Mal Respir 2003; 20:614-7. [PMID: 14528166] [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: 04/27/2023]
Abstract
INTRODUCTION Hydatid disease of bone is very rare accounting for 0.5% - 3% of all localisations. CASE REPORT We report the case of a woman of 30 years who presented with posterior chest pain. The chest radiograph showed an extra-pulmonary mass associated with a lytic rib lesion. Thoracic ultrasound revealed a multiloculated soft tissue and fluid mass. CT scan showed a fluid filled costo-vertebral cyst. MRI identified extension into the spinal canal. Pathological examination of the surgically resected material confirmed the diagnosis. CONCLUSIONS This observation emphasises the role of MRI in assessing the extent of hydatid cysts of the posterior chest wall and in particular invasion of the spinal canal.
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Affiliation(s)
- S Maalej
- Service de Pneumologie Ibn Nafiss, Hôpital Abderrahmen, Mami Ariana, Tunisie
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