Les trajectoires des footballeurs africains à la lumière de la mondialisation

Depuis la promulgation de l'arrêt « Bosman  » en 1995, le nombre de joueurs expatriés recensés dans les principaux championnats européens a considérablement augmenté. Cet article montre que cette augmentation a surtout concerné les joueurs originaires d'Afrique et d'Amérique latine. Leur mobilité intervient dans un contexte très spéculatif au sein duquel de nombreux intermédiaires interagissent pour construire les canaux migratoires permettant aux joueurs de circuler à travers différents pays. Les trajectoires idéales - typiques de joueurs africains en Europe - permettent d'illustrer les logiques sociales, géographiques et économiques à la base de ces flux. Since the "Bosman" law in 1995, the number of expatriate players in the best European leagues has strongly increased. This paper shows that this increase has above all concerned players from Africa and South America. The mobility of these footballers occurs in a highly speculative context in which numerous intermediaries intervene to build up the migratory channels that allow players for circulating between many countries. The ideal-typical career paths of African footballers in Europe permit to illustrate the social, geographic and economic logics underlying flows.

DQB1 locus alone explains most of the risk and protection in narcolepsy with cataplexy in Europe.

STUDY OBJECTIVE: Prior research has identified five common genetic variants associated with narcolepsy with cataplexy in Caucasian patients. To replicate and/or extend these findings, we have tested HLA-DQB1, the previously identified 5 variants, and 10 other potential variants in a large European sample of narcolepsy with cataplexy subjects. DESIGN: Retrospective case-control study. SETTING: A recent study showed that over 76% of significant genome-wide association variants lie within DNase I hypersensitive sites (DHSs). From our previous GWAS, we identified 30 single nucleotide polymorphisms (SNPs) with P < 10(-4) mapping to DHSs. Ten SNPs tagging these sites, HLADQB1, and all previously reported SNPs significantly associated with narcolepsy were tested for replication. PATIENTS AND PARTICIPANTS: For GWAS, 1,261 narcolepsy patients and 1,422 HLA-DQB1*06:02-matched controls were included. For HLA study, 1,218 patients and 3,541 controls were included. MEASUREMENTS AND RESULTS: None of the top variants within DHSs were replicated. Out of the five previously reported SNPs, only rs2858884 within the HLA region (P < 2x10(-9)) and rs1154155 within the TRA locus (P < 2x10(-8)) replicated. DQB1 typing confirmed that DQB1*06:02 confers an extraordinary risk (odds ratio 251). Four protective alleles (DQB1*06:03, odds ratio 0.17, DQB1*05:01, odds ratio 0.56, DQB1*06:09 odds ratio 0.21, DQB1*02 odds ratio 0.76) were also identified. CONCLUSION: An overwhelming portion of genetic risk for narcolepsy with cataplexy is found at DQB1 locus. Since DQB1*06:02 positive subjects are at 251-fold increase in risk for narcolepsy, and all recent cases of narcolepsy after H1N1 vaccination are positive for this allele, DQB1 genotyping may be relevant to public health policy.