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Farhat B, Chrigui R, Rebai N, Sebei A. Analysis of hydrochemical characteristics and assessment of organic pollutants (PAH and PCB) in El Fahs plain aquifer, northeast of Tunisia. Environ Sci Pollut Res Int 2023; 30:84334-84356. [PMID: 37358774 DOI: 10.1007/s11356-023-28216-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 06/07/2023] [Indexed: 06/27/2023]
Abstract
The availability of good quality groundwater constitutes a major concern in many developing countries. The El Fahs shallow aquifer, northeastern Tunisia, is an important source of water supply for various economic sectors in the agricultural region. The intensive exploitation of this groundwater has led to its quality degradation. In fact, assessment of water quality degradation is very useful in planning the conservation and management practices of water resources in this watershed. This research aims to evaluate the groundwater quality and its suitability for irrigation uses, identify the main processes to assess their chemical composition, and investigate the potential sources of persistent organic pollutants (POPs). The hydrogeochemical investigation is thus conducted by collecting groundwater samples and analyzing their physicochemical characteristics. Polycyclic aromatic hydrocarbons (16 PAHs) and polychlorinated biphenyls (7 PCBs) were determined in groundwaters from nine stations. The sampling took place in July 2020. The relative abundance of ions was Na > Mg > Ca > K for cations and Cl > SO4 > HCO3 for anions. The groundwater exhibits two predominant hydrochemical facies: Ca-Mg-Cl/SO4 and Na-Cl. The relevant recorded pollutant is nitrate, which was generally far above values of pollution thresholds indicating the influence by the intensive agricultural activity. The suitability for irrigation purposes was assessed using several parameters (EC, SAR, %Na, TH, PI, Mh, and Kr). As a matter of fact, the results mentioned that the majority of the samples are unsuitable for irrigation uses. An analysis of the organic pollutants indicates that the total PAH and PCB concentrations are above the permissible values. Therefore, a considerable predominance of naphthalene and PCB28 was observed in order to discriminate between pyrolitic and petrogenic PAH sources; low-molecular-weight (LPAH)/high-molecular-weight (HPAH) ratio was calculated. Results showed that PAHs were mainly of petrogenic origin. The results revealed also that the chemical composition of groundwater is influenced by evaporation process, ion exchange, and water-rock interaction during the flow. A high risk of organic contamination has been highlighted linked to anthropogenic activities which have exerted increasing pressure on groundwater quality. The presence of organic pollutants in groundwater is becoming a serious threat to the environment and human health.
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Affiliation(s)
- Boutheina Farhat
- Faculty of Sciences of Tunis, Department of Geology, Laboratory of Mineral Resources and Environment (LRME), University of Tunis El Manar, 2092 El Manar II, Tunis, Tunisia.
| | - Ranya Chrigui
- National School of Engineering of Tunis, LR14ES03 Geotechnical Engineering and Georisk Research Laboratory, University of Tunis El Manar, B.P. 37, Le Belvédère 1002, Tunis, Tunisia
| | - Noamen Rebai
- National School of Engineering of Tunis, LR14ES03 Geotechnical Engineering and Georisk Research Laboratory, University of Tunis El Manar, B.P. 37, Le Belvédère 1002, Tunis, Tunisia
| | - Abdelaziz Sebei
- Faculty of Sciences of Tunis, Department of Geology, Laboratory of Mineral Resources and Environment (LRME), University of Tunis El Manar, 2092 El Manar II, Tunis, Tunisia
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Samet A, Trigui K, Smaoui W, Abid F, Chaker K, Yaich A, Ben Ali S, Chaari H, Falleh S, Abdelmoula B, Abdeleoui N, Mallek S, Mrabet S, Ben Ameur H, Mayouf S, Masmoudi A, Fourati M, Kammoun S, Rebai N, Abdelmoulabouayed N. Bilan génétique pré-assistance médicale à la procréation couplée ou non à l’extraction testiculaire de spermatozoïdes. Prog Urol 2019. [DOI: 10.1016/j.purol.2019.08.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Samet A, Smaoui W, Trigui K, Abdelmoula B, Abid F, Abdeleoui N, Chaker K, Fourati H, Kaabi O, Louati R, Mayouf S, Rekhis A, Fourati M, Kammoun S, Mhiri M, Aloulou S, Abdelmoulabouayed N, Rebai N. Le syndrome de Klinefelter : quel est le pronostic de fertilité ? Prog Urol 2019. [DOI: 10.1016/j.purol.2019.08.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Mseddi M, Rkhis A, Rebai N, Fourati M, Smaoui W, Hamza M, Hadjslimen M, Mhiri M. Mitrofanoff pédiatrique : une solution pour freiner l’évolution vers l’insuffisance rénale. Prog Urol 2018. [DOI: 10.1016/j.purol.2018.07.090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Mseddi M, Masmoudi A, Bouassida M, Maayouf S, slimen MH, Rebai N, Mhiri M. La cure chirurgicale de la varicocèle chez l’adolescent, améliore-t-elle la croissance testiculaire et les paramètres du spermogramme ? Prog Urol 2017. [DOI: 10.1016/j.purol.2017.07.126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Rekik S, Mejdoub I, Chaabouni A, Fourati M, Fourati H, Rebai N, Hadj Slimen M, Mhiri M. Les perforations vésicales au cours d’une résection de tumeur vésicale nécessitant une réparation chirurgicale : caractéristiques cliniques et résultats oncologiques. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.017] [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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Fourati N, Ben Salah H, Sellami N, Rebai N, Bahri M, Mhiri N, Frikha M, Daoud J. Effet hémostatique de la radiothérapie dans la prise en charge des cancers de la vessie. Cancer Radiother 2016. [DOI: 10.1016/j.canrad.2016.08.058] [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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Bouassida M, Smaoui W, Fourati M, Mseddi M, Chabchoub K, Chaabouni A, Rekik S, Rebai N, Masmoudi J, Hadjslimen M, Mhiri M. Étude de la sexualité masculine après dérivation urinaire externe continente de type Mitrofanoff. Prog Urol 2016; 26:115-20. [DOI: 10.1016/j.purol.2015.10.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Revised: 10/15/2015] [Accepted: 10/16/2015] [Indexed: 10/22/2022]
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Mseddi M, Rebai N, Bouassida M, Rekik S, Hadjslimen M, Mhiri M. Amputation du gland après circoncision rituelle : expérience monocentrique devant ce drame familial. Prog Urol 2015; 25:746-7. [DOI: 10.1016/j.purol.2015.08.062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bouassida M, Fourati M, Majdoub B, Kammoun O, Rebai N, Slimen MH, Mhiri N. Impact de la promontofixation cœlioscopique sur la qualité de vie et la sexualité : résultats d’une étude prospective portant sur 26 patientes. Prog Urol 2015; 25:844. [DOI: 10.1016/j.purol.2015.08.257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Rebai N, Fourati M, Chaabouni A, Bouassida M, Rekik S, Smaoui W, Hadj Slimen M, Mhiri M. Corrélation entre fractures du bassin et complications urinaires : une étude à propos de 62 cas. Prog Urol 2014; 24:827-8. [DOI: 10.1016/j.purol.2014.08.101] [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: 10/24/2022]
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Mseddi M, Bouassida M, Chaabouni A, Rebai N, Chabchoub K, Bahloul A, Hadj Slimen M, Mhiri M. Métastase orbitaire d’un adénocarcinome prostatique: à propos d’un cas. African Journal of Urology 2014. [DOI: 10.1016/j.afju.2014.03.036] [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: 10/25/2022] Open
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Chaabouni A, Rebai N, Bouassida M, Fourati M, Chaabène W, Chabchoub K, Hadj Slimen M, Mhiri M. Une verge douloureuse révélant une thrombose veineuse profonde de la verge. À propos de sept cas et revue de la littérature. Sexologies 2014. [DOI: 10.1016/j.sexol.2013.12.011] [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: 10/25/2022]
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Rebai N, Chaabouni A, Bouassida M, Fourati M, Chabchoub K, Slimen MH, Mhiri M. Le ganglioneurome rétropéritonéal: À propos de 5 cas et revue de la littérature. African Journal of Urology 2013. [DOI: 10.1016/j.afju.2013.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Nabil Mhiri M, Smaoui W, Bouassida M, Chabchoub K, Masmoudi J, Hadjslimen M, Chaieb N, Rebai N, Masmoudi S, Bahloul A. Unconsummated marriage in the Arab Islamic world: Tunisian experience. Sexologies 2013. [DOI: 10.1016/j.sexol.2013.02.004] [Citation(s) in RCA: 8] [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: 11/16/2022]
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Nabil Mhiri M, Smaoui W, Bouassida M, Chabchoub K, Masmoudi J, Hadjslimen M, Chaieb N, Rebai N, Masmoudi S, Bahloul A. Le mariage non consommé dans le monde arabo-islamique : l’expérience tunisienne. Sexologies 2013. [DOI: 10.1016/j.sexol.2013.02.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Chaabouni A, Chabchoub K, Rebai N, Bouacida M, Slimen M, Bahloul A, Mhiri M. Testis sparing surgery for Leydig cell tumors: New three cases and review of the current literature. African Journal of Urology 2013. [DOI: 10.1016/j.afju.2013.02.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Mseddi MA, Chabchoub K, Bouasida M, Rebai N, Hadjslimen M, Bahloul A, Mhiri MN. Amputation du gland après circoncision. Basic Clin Androl 2012. [DOI: 10.1007/s12610-012-0161-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Abstract
Résumé
Introduction
Sous nos climats, la circoncision reste l’intervention la plus couramment pratiquée chez le garçon. Elle est souvent réalisée par un personnel paramédical non qualifié, ou même en dehors du milieu médical dont les notions de chirurgie et d’asepsie sont aléatoires. Elle est réputée comme chirurgie bénigne, mais des complications majeures parfois très graves, engageant le pronostic sexuel, voire vital, peuvent survenir. Le but de ce travail était de rapporter les amputations du gland secondaires à la circoncision et reçues en milieu hospitalier urologique.
Patients et méthode
Nous rapportons huit cas d’amputation du gland suite à une circoncision en milieu extrahospitalier selon les méthodes traditionnelles.
Résultats
L’âge moyen des enfants est de six ans (trois à huit ans). L’amputation du gland était faite lors de la circoncision dans quatre cas, dont deux avec section complète. Dans les autres cas, il s’agissait d’une nécrose du gland à cause d’un arc électrique lors de l’utilisation inadéquate du bistouri électrique. Une reconstruction urgente du gland n’avait pu être réalisable que dans trois cas. Le gland sectionné dans le quatrième cas était de mauvaise qualité. On n’a noté qu’un seul succès de revascularisation du gland. Le délai de consultation en cas de nécrose du gland était de trois jours en moyenne. Le traitement n’avait consisté qu’en la réalisation d’une méatoplastie pour obtenir un méat urétral satisfaisant avec réfection de la peau pénienne.
Conclusion
La section du gland demeure une complication, certes rare de la circoncision mais très grave, engageant le pronostic sexuel ultérieur de l’enfant. Cela rend cette intervention non anodine et doit inciter à ne la réaliser qu’en milieu spécialisé par un personnel compétent.
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Gannouni S, Rebai N, Abdeljaoued S. A Spectroscopic Approach to Assess Heavy Metals Contents of the Mine Waste of Jalta and Bougrine in the North of Tunisia. ACTA ACUST UNITED AC 2012. [DOI: 10.4236/jgis.2012.43029] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Chabchoub K, Rebai N, Fakhfakh S, Rekik S, Smaoui W, Hadj Slimen M, Bahloul A, Mhiri M. UP-03.156 Mitrofanoff's Continent Urinary Diversion in Patients with Spinal Cord Injury: Indication and Results. Urology 2011. [DOI: 10.1016/j.urology.2011.07.1245] [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: 10/15/2022]
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Hadj Slimen M, Chabchoub K, Chaib N, Fakhfekh S, Rebai N, Bahloul A, Mhiri M. UP-02.113 Epidemiological Trends in Prostate Cancer in the South of Tunisia Over the Last 24 Years. Urology 2011. [DOI: 10.1016/j.urology.2011.07.931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Rebai N, Chabchoub K, Rekik S, Fourat M, Chaieb N, Bouassida M, Haj Slimen M, Bahloul A, Mhiri M. MP-06.21 Does Kidney Transplantation With Multiple Arteries Affect Graft Survival? Urology 2011. [DOI: 10.1016/j.urology.2011.07.145] [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: 10/15/2022]
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Chabchoub K, Rebai N, Smaoui W, Fakhfakh S, Rekik S, Hadj Slimen M, Bahloul A, Mhiri M. MP-08.02 Xanthogranulomatous Pyelonephritis in Children. Urology 2011. [DOI: 10.1016/j.urology.2011.07.179] [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: 10/15/2022]
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Hadj Slimen M, Chabchoub K, Smaoui W, Rekik S, Rebai N, Bahloul A, Mhiri M. MP-02.04 Use of Digestive Tract to Replace Ureter. Urology 2011. [DOI: 10.1016/j.urology.2011.07.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Rekik S, Rebai N, Chaabouni A, Fourat M, Smaoui W, Bouassida M, Chabchoub K, Haj Slimen M, Bahloul A, Mhiri M. MP-06.20 Influence of Advanced Donor Age on the Evolution of Renal Transplantation. Urology 2011. [DOI: 10.1016/j.urology.2011.07.144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Hadj Slimen M, Chabchoub K, Rekik S, Smaoui W, Rebai N, Bahloul A, Mhiri M. UP-02.114 Experience of Individual Screening of Prostate Cancer in Southern Tunisia. Urology 2011. [DOI: 10.1016/j.urology.2011.07.932] [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: 10/15/2022]
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Dujardin T, Massoud W, Rebai N, Saheb N, Dumonceau O, V. Molinié V, Baumert H. MP-05.14: Laparoscopic partial nephrectomy: what we have learned after 200 cases? Urology 2007. [DOI: 10.1016/j.urology.2007.06.262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Massoud W, Rebai N, Saheb N, Fennouri M, Dumonceau O, Baumert H. VID-01.03: Thulium laser vapo-resection of the prostate. Urology 2007. [DOI: 10.1016/j.urology.2007.06.627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Baumert H, Massoud W, Rebai N, Saheb N, Dumonceau O, Molinié V, Fizazi K. MP-21.11: Laparoscopic post chemotherapy retro peritoneal lymph node dissection for residual mass: initial results. Urology 2007. [DOI: 10.1016/j.urology.2007.06.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Baumert H, Massoud W, Rebai N, Schlosser J, Dumonceau O, Fizazi K. VID-06.09: Transperitoneal approach for laparoscopic retro peritoneal lymph node dissection (RPLND) for large residual mass. Urology 2007. [DOI: 10.1016/j.urology.2007.06.580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Massoud W, Rebai N, Saheb N, Dumonceau O, Baumert H. VID-06.08: Laparoscopic extra peritoneal post chemo retroperitoneal lymph node dissection (RPLND). Urology 2007. [DOI: 10.1016/j.urology.2007.06.579] [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]
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Massoud W, Rebai N, Peyrat L, Dumonceau O, Baumert H. VID-05.05: Laparoscopic cystectomy and neo-bladder formation in woman. Urology 2007. [DOI: 10.1016/j.urology.2007.06.587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Rebai N, Massoud W, Saheb N, Dumonceau O, Baumert H. VID-01.10: Different techniques for prostatic dissection according to individualised oncological and functional requirements. Urology 2007. [DOI: 10.1016/j.urology.2007.06.634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Rebai N, Massoud W, Saheb N, Fennouri M, Dumonceau O, Baumert H. VID-03.04: Technique allowing the warm ischemia time to be reduced by half during laparoscopic partial nephrectomy. Urology 2007. [DOI: 10.1016/j.urology.2007.06.607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Hanna Z, Rebai N, Poudrier J, Jolicoeur P. Distinct regulatory elements are required for faithful expression of human CD4 in T cells, macrophages, and dendritic cells of transgenic mice. Blood 2001; 98:2275-8. [PMID: 11568018 DOI: 10.1182/blood.v98.7.2275] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [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] Open
Abstract
To identify the regulatory elements controlling expression of the human CD4 (hCD4) gene in different cell types of the immune system, deletion and chimeric (human/murine) reporter genes were constructed and tested in transgenic (Tg) mice. Regulatory elements required for the proper hCD4 expression in the immature double-positive thymic T cells were identified in the enhancer and in the 3' end of intron 1. Expression of hCD4 in macrophages is controlled by at least 2 sets of regulatory elements: one present in front of exon 1 and the second at the 5' end of intron 1. The hCD4 elements required for expression on both myeloid and lymphoid CD8alpha(+) dendritic cells (DCs) from lymph node and thymus were found to be different from those required for macrophage expression. The results indicate that expression of hCD4 in T cells, macrophages, and DCs is controlled by distinct regulatory elements.
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Affiliation(s)
- Z Hanna
- Laboratory of Molecular Biology, Clinical Research Institute of Montreal, Montreal, Quebec, Canada.
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Hoemann CD, Beaulieu N, Girard L, Rebai N, Jolicoeur P. Two distinct Notch1 mutant alleles are involved in the induction of T-cell leukemia in c-myc transgenic mice. Mol Cell Biol 2000; 20:3831-42. [PMID: 10805726 PMCID: PMC85710 DOI: 10.1128/mcb.20.11.3831-3842.2000] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We have previously characterized a large panel of provirus insertion Notch1 mutant alleles and their products arising in thymomas of MMTV(D)/myc transgenic mice. Here, we show that these Notch1 mutations represent two clearly distinct classes. In the first class (type I), proviral integrations were clustered just upstream of sequences encoding the transmembrane domain. Type I Notch1 alleles produced two types of mutant Notch1 RNA, one of which encoded the entire Notch1 cytoplasmic domain [N(IC)] and the other of which encoded a soluble ectodomain [N(EC)(Mut)] which, in contrast to the processed wild-type ectodomain [N(EC)(WT)], did not reside at the cell surface and became secreted in a temperature-dependent manner. A second, novel class of mutant Notch1 allele (type II) encoded a Notch1 receptor with the C-terminal PEST motif deleted (DeltaCT). The type II Notch1(DeltaCT) protein was expressed as a normally processed receptor [N(EC)(WT) and N(IC)(DeltaCT)] at the cell surface, and its ectodomain was found to be shed into the extracellular medium in a temperature- and calcium-dependent manner. These data suggest that both type I and type II mutations generate two structurally distinct Notch1 N(EC) and N(IC) proteins that may participate in tumor formation, in collaboration with the c-myc oncogene, through distinct mechanisms. Constitutive type I N(IC) and type II N(IC)(DeltaCT) expression may enhance Notch1 intracellular signaling, while secreted or shed type I N(EC)(Mut) and type II N(EC) proteins may differentially interact in an autocrine or paracrine fashion with ligands of Notch1 and affect their signaling.
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Affiliation(s)
- C D Hoemann
- Laboratory of Molecular Biology, Clinical Research Institute of Montreal, Montreal, Quebec H2W 1R7, Canada
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Saragovi HU, Rebai N, Di Guglielmo GM, Macleod R, Sheng J, Rubin DH, Greene MI. A G1 cell cycle arrest induced by ligands of the reovirus type 3 receptor is secondary to inactivation of p21ras and mitogen-activated protein kinase. DNA Cell Biol 1999; 18:763-70. [PMID: 10541435 DOI: 10.1089/104454999314908] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The reovirus type 3 S1 gene product (type 3 hemagglutinin; HA3) is the viral protein responsible for binding to a mammalian cell-surface receptor. It has been shown that HA3 binding to its receptor inhibits cell growth, even in the continuous presence of serum mitogens. Here, receptor-mediated signal transduction leading to growth arrest was studied after binding with synthetic or recombinant ligands in the absence of viral infection. Receptor ligation caused rapid inactivation of p21(ras), a decrease in Raf phosphorylation and in mitogen-activated protein kinase (MAPK) enzymatic activity, and G1 cell cycle arrest. Transfection and expression of constitutively active v-Has-ras prevented the G1 arrest, indicating that inactivation of p21(ras) is causative. Interestingly, v-Has-ras expression also decreased the efficiency of reoviridae replication, suggesting that inactivation of p21(ras) signals is required at some step of the viral cycle. This study may define new mechanisms regulating cell growth and support the approach of using viral proteins to identify and study cellular receptors. Synthetic receptor ligands with antiproliferative properties may be useful in drug development with the aim of blocking mitosis.
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MESH Headings
- Animals
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/pharmacology
- Capsid Proteins
- Cell Cycle Proteins
- Cell Division/drug effects
- Cytopathogenic Effect, Viral
- G1 Phase/drug effects
- Genes, ras
- Growth Inhibitors/chemistry
- Growth Inhibitors/pharmacology
- Guanosine Diphosphate/metabolism
- Guanosine Triphosphate/metabolism
- Humans
- Ligands
- MAP Kinase Signaling System/drug effects
- Mammalian orthoreovirus 3/physiology
- Mice
- Mitogen-Activated Protein Kinases/antagonists & inhibitors
- Oncogene Protein p21(ras)/antagonists & inhibitors
- Oncogene Protein p21(ras)/physiology
- Peptides, Cyclic/pharmacology
- Phosphorylation/drug effects
- Protein Processing, Post-Translational/drug effects
- Protein Structure, Tertiary
- Proto-Oncogene Proteins c-raf/metabolism
- Proto-Oncogene Proteins p21(ras)/antagonists & inhibitors
- Proto-Oncogene Proteins p21(ras)/physiology
- Receptors, Virus/agonists
- Receptors, Virus/physiology
- Recombinant Fusion Proteins/physiology
- Transfection
- Tumor Cells, Cultured
- Viral Proteins/chemistry
- Viral Proteins/immunology
- Viral Proteins/physiology
- Virus Replication/drug effects
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Affiliation(s)
- H U Saragovi
- Department of Pharmacology, McGill Cancer Center, McGill University, Montréal, Québec, Canada
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38
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Affiliation(s)
- P Jolicoeur
- Clinical Research Institute of Montréal, McGill University, Québec, Canada
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39
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Hanna Z, Kay DG, Rebai N, Guimond A, Jothy S, Jolicoeur P. Nef harbors a major determinant of pathogenicity for an AIDS-like disease induced by HIV-1 in transgenic mice. Cell 1998; 95:163-75. [PMID: 9790524 DOI: 10.1016/s0092-8674(00)81748-1] [Citation(s) in RCA: 376] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Transgenic (Tg) mice expressing the complete coding sequences of HIV-1 in CD4+ T cells and in cells of the macrophage/dendritic lineages develop severe AIDS-like pathologies: failure to thrive/weight loss, diarrhea, wasting, premature death, thymus atrophy, loss of CD4+ T cells, interstitial pneumonitis, and tubulo-interstitial nephritis. The generation of Tg mice expressing selected HIV-1 gene(s) revealed that nef harbors a major disease determinant. The latency and progression (fast/slow) of the disease were strongly correlated with the levels of Tg expression. Nef-expressing Tg thymocytes were activated and alpha-CD3 hyperresponsive with respect to tyrosine phosphorylation of several substrates, including LAT and MAPK. The similarity of this mouse model to human AIDS, particularly pediatric AIDS, suggests that Nef may play a critical role in human AIDS, independently of its role in virus replication.
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Affiliation(s)
- Z Hanna
- Clinical Research Institute of Montreal, Department of Medicine, Université de Montréal, Quebec, Canada
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40
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Saragovi HU, Rebai N, Roux E, Gagnon M, Zhang X, Robaire B, Bromberg J, Greene MI. Signal transduction and antiproliferative function of the mammalian receptor for type 3 reovirus. Curr Top Microbiol Immunol 1998; 233:155-66. [PMID: 9599925 DOI: 10.1007/978-3-642-72092-5_7] [Citation(s) in RCA: 2] [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] [Indexed: 02/07/2023]
Affiliation(s)
- H U Saragovi
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada
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41
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Hanna Z, Kay DG, Cool M, Jothy S, Rebai N, Jolicoeur P. Transgenic mice expressing human immunodeficiency virus type 1 in immune cells develop a severe AIDS-like disease. J Virol 1998; 72:121-32. [PMID: 9420207 PMCID: PMC109356 DOI: 10.1128/jvi.72.1.121-132.1998] [Citation(s) in RCA: 100] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
We have constructed transgenic (Tg) mice expressing the entire human immunodeficiency virus type 1 (HIV-1) coding sequences in cells targeted by HIV-1 infection in humans. These Tg mice developed a severe AIDS-like disease leading to early death (< 1 month). They developed muscle wasting, severe atrophy and fibrosis of lymphoid organs, tubulointerstitial nephritis, and lymphoid interstitial pneumonitis. In addition the expression of RANTES was increased in various tissues of these Tg mice relative to that in the normal controls. Disease appearance was correlated with the levels of transgene expression. The numerous pathologies observed in these mice are remarkably similar to those observed in human AIDS and, more specifically, in pediatric AIDS.
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Affiliation(s)
- Z Hanna
- Laboratory of Molecular Biology, Clinical Research Institute of Montreal, Quebec, Canada
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42
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Abstract
The Pr60gag protein of the murine AIDS (MAIDS) defective virus promotes the proliferation of the infected target B cells and is responsible for inducing a severe immunodeficiency disease. Using the yeast two-hybrid system, we identified the SH3 domain of c-Abl as interacting with the proline-rich p12 domain of Pr60gag. The two proteins were shown to associate in vitro and in vivo in MAIDS virus-infected B cells. Overexpression of Pr60(gag) in these cells led to a detectable increase of the levels of c-Abl protein and to its translocation at the membrane. These results suggest that this viral protein serves as a docking site for signaling molecules and that c-Abl may be involved in the proliferation of infected B cells.
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Affiliation(s)
- P Dupraz
- Laboratory of Molecular Biology, Clinical Research Institute of Montréal, Québec, Canada
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43
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Grégoire C, Lin SY, Mazza G, Rebai N, Luescher IF, Malissen B. Covalent assembly of a soluble T cell receptor-peptide-major histocompatibility class I complex. Proc Natl Acad Sci U S A 1996; 93:7184-9. [PMID: 8692966 PMCID: PMC38957 DOI: 10.1073/pnas.93.14.7184] [Citation(s) in RCA: 19] [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: 02/01/2023] Open
Abstract
We used stepwise photochemical cross-linking for specifically assembling soluble and covalent complexes made of a T-cell antigen receptor (TCR) and a class I molecule of the major histocompatibility complex (MHC) bound to an antigenic peptide. For that purpose, we have produced in myeloma cells a single-chain Fv construct of a TCR specific for a photoreactive H-2Kd-peptide complex. Photochemical cross-linking of this TCR single-chain Fv with a soluble form of the photoreactive H-2Kd-peptide ligand resulted in the formation of a ternary covalent complex. We have characterized the soluble ternary complex and showed that it reacted with antibodies specific for epitopes located either on the native TCR or on the Kd molecules. By preventing the fast dissociation kinetics observed with most T cell receptors, this approach provides a means of preparing soluble TCR-peptide-MHC complexes on large-scale levels.
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MESH Headings
- Affinity Labels
- Amino Acid Sequence
- Animals
- Base Sequence
- Binding, Competitive
- Cell Line
- Cross-Linking Reagents
- DNA Primers
- H-2 Antigens/immunology
- H-2 Antigens/isolation & purification
- H-2 Antigens/metabolism
- Hybridomas
- Kinetics
- Major Histocompatibility Complex
- Mice
- Molecular Sequence Data
- Polymerase Chain Reaction
- Receptors, Antigen, T-Cell/immunology
- Receptors, Antigen, T-Cell/isolation & purification
- Receptors, Antigen, T-Cell/metabolism
- Receptors, Antigen, T-Cell, alpha-beta/immunology
- Receptors, Antigen, T-Cell, alpha-beta/isolation & purification
- Receptors, Antigen, T-Cell, alpha-beta/metabolism
- Recombinant Proteins/immunology
- Recombinant Proteins/isolation & purification
- Recombinant Proteins/metabolism
- T-Lymphocytes, Cytotoxic/immunology
- Tumor Cells, Cultured
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Affiliation(s)
- C Grégoire
- Centre d'Immunologic, Institut National de la Santé et de la Recherche Médicale, Marseille, France
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44
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Rebai N, Almazan G, Wei L, Greene MI, Saragovi HU. A p65/p95 neural surface receptor is expressed at the S-G2 phase of the cell cycle and defines distinct populations. Eur J Neurosci 1996; 8:273-81. [PMID: 8714698 DOI: 10.1111/j.1460-9568.1996.tb01211.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A surface receptor complex of Mr approximately 65 000 (p65) and approximately 95 000 (p95) is expressed in cells of the central nervous system of mice. This receptor is recognized by monoclonal antibody 87.92.6 or by reovirus type 3 haemagglutinin as unnatural ligands. The p65/p95 receptor is expressed mostly in neural embryonic precursors undergoing proliferation, especially those in the S-G2 phase of the cell cycle. Receptor expression decreases progressively throughout embryogenesis to low but detectable levels in the adult brain. Biochemical characterization revealed that the neural p65/p95 receptor complex is indistinguishable from the p65/p95 receptor expressed in T cells, where receptor ligation leads to a mitogenic block. In neural and lymphoid tissues the p65/p95 receptor (or an associated protein) possesses a tyrosine kinase enzymatic activity. Receptor ligation in neural cells resulted in the rapid tyrosine phosphorylation of cellular proteins which are different from substrates phosphorylated in T cells. Differential substrate coupling to the receptor may account for differences in signal transduction and biology between neural cells and T cells. Further study of this receptor complex may help define important features of neural proliferation, differentiation and survival.
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Affiliation(s)
- N Rebai
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Canada
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45
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Rebai N, Pantaleo G, Demarest JF, Ciurli C, Soudeyns H, Adelsberger JW, Vaccarezza M, Walker RE, Sekaly RP, Fauci AS. Analysis of the T-cell receptor beta-chain variable-region (V beta) repertoire in monozygotic twins discordant for human immunodeficiency virus: evidence for perturbations of specific V beta segments in CD4+ T cells of the virus-positive twins. Proc Natl Acad Sci U S A 1994; 91:1529-33. [PMID: 7906416 PMCID: PMC43193 DOI: 10.1073/pnas.91.4.1529] [Citation(s) in RCA: 58] [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] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
We analyzed the T-cell receptor (TCR) V beta repertoire in human immunodeficiency virus type 1 (HIV-1)-infected individuals at different stages of disease. To circumvent the effect of HLA and other loci on the expressed TCR repertoire, we compared the TCR repertoire in nine pairs of monozygotic twins who were discordant for HIV infection. A semiquantitative polymerase chain reaction (PCR) assay and flow cytometry enabled us to show distinct differences in the V beta repertoire in the HIV-positive twin compared with the HIV-negative twin. By combining PCR and cytofluorometry, these differences were restricted to a specific set of TCR V beta segments, with members of the V beta 13 family perturbed in six out of seven cases and those of the V beta 21 family perturbed in four out of seven cases studied. Most of the other V beta families remained unchanged. Our results provide direct evidence for a skewed TCR repertoire in HIV infection.
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Affiliation(s)
- N Rebai
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
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46
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Ledoux S, Rebai N, Dagenais A, Shaw IT, Nalbantoglu J, Sekaly RP, Cashman NR. Amyloid precursor protein in peripheral mononuclear cells is up-regulated with cell activation. J Immunol 1993; 150:5566-75. [PMID: 8515076] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The deposition of beta/A4 protein in extraneural organs of patients with Alzheimer disease suggests that this peptide may in part be derived from a peripheral precursor. We studied expression of amyloid precursor protein (APP) in PBMC. APP expression was detectable in resting PBMC by northern blot analysis, immunoblotting studies, and immunohistochemistry. By reverse transcription-polymerase chain reaction, the 751 and 770 APP transcripts containing the Kunitz protease inhibitor (KPI) domain were approximately 10-fold more abundant than the 695 transcript lacking the KPI domain. Activation of PBMC with the lectin PHA-P was associated with an increase in apparent intracellular APP content by cytofluorometry, and an increase in the proportion of the 695 APP transcript lacking the KPI domain. We conclude that resting and activated PBMC express APP and could contribute to a circulating pool of this protein. In addition, PBMC APP is up-regulated with mitogenic stimulation and may participate in the regulation of activation of these cells.
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Affiliation(s)
- S Ledoux
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Quebec, Canada
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47
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Ledoux S, Rebai N, Dagenais A, Shaw IT, Nalbantoglu J, Sekaly RP, Cashman NR. Amyloid precursor protein in peripheral mononuclear cells is up-regulated with cell activation. The Journal of Immunology 1993. [DOI: 10.4049/jimmunol.150.12.5566] [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] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
The deposition of beta/A4 protein in extraneural organs of patients with Alzheimer disease suggests that this peptide may in part be derived from a peripheral precursor. We studied expression of amyloid precursor protein (APP) in PBMC. APP expression was detectable in resting PBMC by northern blot analysis, immunoblotting studies, and immunohistochemistry. By reverse transcription-polymerase chain reaction, the 751 and 770 APP transcripts containing the Kunitz protease inhibitor (KPI) domain were approximately 10-fold more abundant than the 695 transcript lacking the KPI domain. Activation of PBMC with the lectin PHA-P was associated with an increase in apparent intracellular APP content by cytofluorometry, and an increase in the proportion of the 695 APP transcript lacking the KPI domain. We conclude that resting and activated PBMC express APP and could contribute to a circulating pool of this protein. In addition, PBMC APP is up-regulated with mitogenic stimulation and may participate in the regulation of activation of these cells.
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Affiliation(s)
- S Ledoux
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Quebec, Canada
| | - N Rebai
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Quebec, Canada
| | - A Dagenais
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Quebec, Canada
| | - I T Shaw
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Quebec, Canada
| | - J Nalbantoglu
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Quebec, Canada
| | - R P Sekaly
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Quebec, Canada
| | - N R Cashman
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Quebec, Canada
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48
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Abstract
Viral superantigens (SAg) were shown in mice to induce anergy and deletion of T cells bearing specific T cell receptor V beta subsets, these perturbations being mainly restricted to CD4+ T cells. In accordance with this model, a putative HIV-associated SAg could contribute to the pathogenesis of HIV-1 infection and AIDS. To reveal the presence of this putative molecule, three study protocols were designed that relied on the fact that similarity of the expressed V beta repertoire of a given pair of individuals is proportional to the relative likeness of their MHC background: (1) by using a quantitative PCR technique that allows simultaneous typing of 24 V beta families, the V beta repertoires of HIV-discordant monozygotic twins were compared; (2) the V beta repertoire found in lymph nodes of HIV-infected subjects was contrasted to that found in peripheral blood of the same individuals; (3) the V beta repertoire of a cohort of HIV-infected mothers was compared with that of their HIV-infected and uninfected children. Results from these approaches revealed that significant perturbations of the TCR V beta repertoire were taking place in HIV-infected subjects, and that these alterations were restricted to T cells expressing specific V beta s. These results are consistent with the presence of an HIV-associated SAg in HIV-1 infection.
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MESH Headings
- Adult
- Animals
- Antigens, Bacterial/immunology
- Antigens, Viral/immunology
- Apoptosis
- CD4-Positive T-Lymphocytes/immunology
- CD4-Positive T-Lymphocytes/microbiology
- Cohort Studies
- Diseases in Twins
- Female
- Gene Rearrangement, beta-Chain T-Cell Antigen Receptor
- HIV Antigens/immunology
- HIV Infections/congenital
- HIV Infections/immunology
- HIV-1/immunology
- HLA-D Antigens/immunology
- Humans
- Immune Tolerance
- Infant, Newborn
- Leukemia Virus, Murine/immunology
- Leukemia Virus, Murine/pathogenicity
- Lymph Nodes/immunology
- Lymph Nodes/pathology
- Lymphocyte Activation
- Mice
- Models, Biological
- Murine Acquired Immunodeficiency Syndrome/genetics
- Murine Acquired Immunodeficiency Syndrome/immunology
- Murine Acquired Immunodeficiency Syndrome/microbiology
- Pregnancy
- Pregnancy Complications, Infectious
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Twins, Monozygotic
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Affiliation(s)
- H Soudeyns
- Laboratoire d'Immunologie, Institut de Recherches Cliniques de Montreal, Quebec, Canada
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49
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Hemler ME, Malissen B, Rebai N, Liabeuf A, Mawas C, Kourilsky FM, Strominger JL. A 55,000 Mr surface antigen on activated human T lymphocytes defined by a monoclonal antibody. Hum Immunol 1983; 8:153-65. [PMID: 6417069 DOI: 10.1016/0198-8859(83)90010-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A T cell growth factor-dependent alloreactive human T cell line has been used to generate a monoclonal antibody B1.49.9 that reacts with an antigen present on most if not all mitogen or alloantigen activated T cells but not on resting T cells. The T lymphoblastoid cell line HUT-102 is also strongly reactive with B1.49.9 but all other T and non-T leukemia-lymphoma cell lines tested were negative. The B1.49.9 antigen is a glycoprotein of 55,000 Mr on mitogen or alloantigen activated T cells and 50,000 Mr on the cell line HUT-102. Pulse labeling experiments showed that a 40,000 Mr precursor (at approximately 0.7 h) which does not bind to ricin lectin precedes the appearance of the ricin-binding 55,000 Mr form. Comparisons of the monoclonal antibody anti-Tac, which recognizes the IL-2 receptor, to B1.49.9 suggest that B1.49.9 also recognizes a structure similar or identical to the IL-2 receptor.
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50
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Bourgue F, Rebai N, Mawas C. Human allospecific T cell proliferative clones: different T cell clones expressing an apparently identical HLA class II specificity are heterogeneous in regard to their proliferative inhibition by a panel of monoclonal antibodies against human Ia-like antigens. Hum Immunol 1983; 8:33-40. [PMID: 6195133 DOI: 10.1016/0198-8859(83)90079-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Four independent PLT clones displaying an apparently identical class II specificity (i.e., Dw/DR3) were found to give a heterogeneous pattern of inhibition in relation to 15 anti-class II mAb and an anti-beta 2m mAb used as a control. Some clones were inhibited by all anti-class II mAbs, irrespective of the cluster of molecular subsets with which they reacted. Such clones were also inhibited by the control anti-beta 2m mAb. Other clones were inhibited by only a few of the mAb tested. Within this group of T clones following the addition of a limiting amount of conditioned medium the inhibitory data of all independent clones with an identical specificity were inhibited by the same mAb; under these conditions, it was possible to relate the mAb inhibition patterns with the specificity of the T cell clones and these T cell specificities with the epitopic cluster/molecular subsets defined by these mAbs. A new level of T cell subset heterogeneity within T cell clones with apparent identical proliferative specificities is demonstrated, in relation to the T cell clone "susceptibility" or "resistance" to the effects of anti-class II mAbs directed towards their own Ia-like antigens.
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