HLA allele and haplotype frequencies in Algerians : Relatedness to Spaniards and Basques

The powerful genetic polymorphism of the HLA system has been used to identify individuals and populations. Ethnic groups may be characterized by specific HLA allele frequencies and particular extended HLA haplotypes; also, genetic relationships among these groups may be deduced. In the present study, serology and DNA typing were used to detect HLA-A, -B, -C, -DR, and -DQ alleles in each individual and to calculae characteristic haplotypes in Algerians. These results were compared to those previously obtained in other populations, particularly northern Mediterraneans; genetic distances and their respective dendrograms place Basques and Spaniards closer to Algerians than to other Europeans. Also, characteristic Basque and/or Spanish haplotypes are found in Algerians; i.e., A30-B18-Cw3-DR3-DQ2 and Al-B57-Ctv7-DR7-DQ2. This supports the evidence that the Algerian population, mainly its paleo-North African component (Berbers), has a common descent with Basques and Spaniards, probably reflecting a preneolithic relationship between Iberians and paleo-North Africans.     

Evaluation of three commercially available hepatitis C virus antibody detection assays under the conditions of a clinical virology laboratory.

BACKGROUND: Most studies evaluating antibody detection assays are conducted on samples from healthy blood donors but not on samples of hospitalized patients which can show non-specific reactions. OBJECTIVES: To compare the performance of three commercial automated assays for the detection of hepatitis C virus (HCV) antibodies, Monolisa anti-HCV Plus version 2, Axsym anti-HCV 3.0 and Vitros anti-HCV, on a population of hospitalized patients. STUDY DESIGN: The specificity of the assays was prospectively evaluated in 2020 routine serum samples. In order to assign the serostatus of each sample, those giving positive or discordant results were further tested by three immunoblots and by RT-PCR (Roche). Moreover, the sensitivity was evaluated on eight commercial HCV seroconversion panels. RESULTS: The Monolisa, Axsym and Vitros assays showed specificities of 99.64%, 99.12% and 99.33%, respectively. Concerning the sensitivity, among 49 samples, the number of positive results was 21, 24 and 24 for the Monolisa, Axsym and Vitros kits, respectively. The differences were not statistically significant at an alpha risk of 5%. CONCLUSIONS: All assays appeared to be reliable for routine screening, but there were a surprising number of indeterminate samples that could not be resolved by confirmatory tests.     

Primary health care organizational characteristics associated with better accessibility: data from the QUALICO-PC survey in Quebec

Background

First-contact accessibility remains an important problem in Canada, with this indicator staying the worst of all Organization for Economic Co-operation and Development countries. In the province of Quebec, a number of primary healthcare (PHC) organizations have adopted measures to improve access (e.g. advance access scheduling, expanded nursing role, electronic medical record, financial incentives). The impact of those changes is unknown. The goal of this study is to assess which PHC organizations’ characteristics are associated with improved first-contact accessibility.

Methods

We conducted a secondary data analysis of the Quebec survey, conducted as part of the QUALICO-PC study on primary care performance. QUALICO-PC is a cross-sectional study to assess quality, costs and equity in PHC across 35 countries and jurisdictions. Organizational characteristics were measured from the family practitioners’ questionnaire. First-contact accessibility was measured from the patient questionnaire filled by patients who received care in the participating PHC organizations. Multi-level logistic regression was used to assess the association of organizational characteristics as predictors of patient-reported accessibility.

Results

A total of 218 family practitioners participated in the study with 1798 of their patients. PHC organizations characteristics associated with increased first-contact accessibility included the possibility to have a same-day appointment or to walk in the clinic without an appointment, higher number of physicians per clinic and higher number of hours worked by the family physician. Electronic medical record and expanded nursing role were not associated with increased accessibility.

Conclusions

Same-day access and higher family physician working hours are associated with improved patient-reported accessibility. Other PHC organizations characteristics targeted by recent reforms were not associated with improved accessibility.

     

Comparison of complications after Ahmed versus Baerveldt implant in glaucoma patients: one year follow-up

AIM: To compare surgical results of the Ahmed and Baerveldt implant procedures in glaucoma patients at 1y follow-up at Jakarta Eye Center (JEC) Eye Hospitals. METHODS: This cohort retrospective study was conducted on glaucoma patients aged ≥18y who had undergone Ahmed and Baerveldt implant surgery. Intraocular pressure (IOP), visual acuity, glaucoma medication, success rate, early and late postoperative complications, and the number of resurgeries were analyzed. RESULTS: A total of 351 eyes in the Ahmed group and 94 eyes in the Baerveldt group were included in this study. At 1y follow-up, the mean IOP was found to be significantly lower in the Baerveldt group (13±4.47 mm Hg) compared to the Ahmed group (15.02±5.73 mm Hg; P=0.025). Glaucoma medication was required in both the Ahmed and Baerveldt groups (58.92% vs 71.67%). Comparable success rate was found in both groups. The Ahmed group revealed a complete and qualified success of 86.82%, and failure of 13.17%. Similarly, the Baerveldt group showed complete and qualified success in 87.75% and failure in 12.25% cases. In the Ahmed group, 11.97% early complications, 26.06% late complications and 9.97% resurgeries were observed. In comparison, in the Baerveldt group, 23.40% early complications, 30.95% late complications and 11.70% resurgeries were observed. CONCLUSION: Both groups of glaucoma implants show significant IOP reduction, however, the Baerveldt implant group demonstrates greater IOP reduction with more failure rates and complications than the Ahmed implant group.     

Evaluation of a training and communication-network nephrology program for community pharmacists

Objectives To assess the feasibility and impact of implementing ProFiL program to optimize community-pharmacist management of drug-related problems among chronic kidney disease patients followed in a predialysis clinic. The program comprises a training workshop, communication-network program and consultation service. Setting Forty-two community pharmacies, 101 pharmacists, and 90 chronic kidney disease patients attending a predialysis clinic in Laval (Canada). Patients were followed-up for 6 months. Method In a six-month, pilot, open, cluster-randomized controlled trial, community pharmacies were assigned to ProFiL or the usual care. Chronic kidney disease patients of these pharmacies attending a predialysis clinic were recruited. ProFiL pharmacists attended a workshop, received patient information (diagnoses, medications, and laboratory-test results) and had access to a consultation service. Their knowledge and satisfaction were measured before and after the workshop. The mean numbers of pharmacists’ written recommendations to physicians (pharmaceutical opinions) and refusals to dispense a medication were computed. Results Of the ProFiL pharmacists, 84% attended the workshop; their knowledge increased from 52% to 88% (95% CI: 29–40%). Most ProFiL pharmacists rated workshop (95%), communication program (82%) and consultation service (59%) as “excellent” or “very good”; 82% said the program improved the quality of their follow-up. The consultation service received 21 requests. ProFiL and usual care pharmacists issued a mean of 0.50 and 0.02 opinion/patient, respectively, (95% CI of the adjusted difference: 0.28–1.01 opinion/patient). Conclusion The results of this pilot study suggest that ProFiL can be implemented and may help community pharmacists intervene more frequently to manage drug-related problems. However, a larger-scale study with longer follow-up is necessary to evaluate the impact of the program on management of drug-related problems and its clinical relevance. Institution where the study was conducted: Centre ambulatoire, Centre de santé et de services sociaux de Laval. Information about presentation of the work as an abstract or poster: Abstracts of this study have been published in the proceedings of the 3rd Canadian Joint Therapeutics Congress of the Canadian Society for Clinical Pharmacology—Canadian Association for Population Therapeutics—Canadian College of Clinical Pharmacy (Toronto, Canada, May 2006), the Colloque 2006 of the Réseau québécois de recherche sur l’usage des médicaments (Quebec, Canada, June 2006), the 22nd International Conference of the International Society of Pharmacoepidemiology (Lisbon, Portugal, August 2006), and the North American Primary Care Research Group (NAPCRG) annual meeting (Vancouver, Canada, October 2007).     

Neonatal renal venous thrombosis following an electrical shock in pregnancy]

Neonatal renal venous thrombosis may result in severe morbidity. Predisposing conditions are well known. We report the case of an unusual and early neonatal renal venous thrombosis. The mother received an electrical shock at 34 weeks gestation. This case demonstrates that maternal electrical shock effect on the fetus should be early investigated.     

Hierarchy of simulation models in predicting structure and energetics of the Src SH2 domain binding to tyrosyl phosphopeptides.

Structure and energetics of the Src Src Homology 2 (SH2) domain binding with the recognition phosphopeptide pYEEI and its mutants are studied by a hierarchical computational approach. The proposed structure prediction strategy includes equilibrium sampling of the peptide conformational space by simulated tempering dynamics with the simplified, knowledge-based energy function, followed by structural clustering of the resulting conformations and binding free energy evaluation of a single representative from each cluster, a cluster center. This protocol is robust in rapid screening of low-energy conformations and recovers the crystal structure of the pYEEI peptide. Thermodynamics of the peptide-SH2 domain binding is analyzed by computing the average energy contributions over conformations from the clusters, structurally similar to the predicted peptide bound structure. Using this approach, the binding thermodynamics for a panel of studied peptides is predicted in a better agreement with the experiment than previously suggested models. However, the overall correlation between computed and experimental binding affinity remains rather modest. The results of this study show that small differences in binding free energies between the Ala and Gly mutants of the pYEEI peptide are considerably more difficult to predict than the structure of the bound peptides, indicating that accurate computational prediction of binding affinities still remains a major methodological and technical challenge.