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215P Assessment of patient and clinician awareness and clinical outcomes of changes in lifestyle habits during lung cancer treatment. J Thorac Oncol 2023. [DOI: 10.1016/s1556-0864(23)00468-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
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Passive Membrane Permeability of Sizable Acyclic β-Hairpin Peptides. ACS Med Chem Lett 2023; 14:278-284. [PMID: 36923919 PMCID: PMC10009788 DOI: 10.1021/acsmedchemlett.2c00486] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 01/24/2023] [Indexed: 01/28/2023] Open
Abstract
The recent shift toward increasingly larger drug modalities has created a significant demand for novel classes of compounds with high membrane permeability that can inhibit intracellular protein-protein interactions (PPIs). While major advances have been made in the design of cell-permeable helices, stapled β-sheets, and cyclic peptides, the development of large acyclic β-hairpins lags far behind. Therefore, we investigated a series of 26 β-hairpins (MW > 1.6 kDa) belonging to a chemical space far beyond the Lipinski "rule of five" (fbRo5) and showed that, in addition to their innate plasticity, the lipophilicity of these peptides (log D 7.4 ≈ 0 ± 0.7) can be tuned to drastically improve the balance between aqueous solubility and passive membrane permeability.
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COST-EFFECTIVENESS OF BENRALIZUMAB VERSUS MEPOLIZUMAB AND DUPILUMAB IN PATIENTS WITH SEVERE UNCONTROLLED EOSINOPHILIC ASTHMA IN SPAIN. J Asthma 2022; 60:1210-1220. [PMID: 36322679 DOI: 10.1080/02770903.2022.2139718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To assess the cost-effectiveness of benralizumab (benra) vs. mepolizumab (mepo) and dupilumab (dupi) for the treatment of patients with severe uncontrolled asthma from the Spanish Health System perspective. METHODS Exacerbations avoided, quality-adjusted life years (QALYs) gained and costs in a 5-year period were estimated with a Markov model for a cohort of 1,000 patients in which, based on published evidence, 31% of the patients received biologics + oral corticosteroids (OCS) and 69% received only biologics. Efficacy data (exacerbation reduction and OCS elimination) were derived from a matching-adjusted indirect comparison. Published EQ-5D utilities per health state (biologic alone, biologic + OCS, standard of care + OCS, exacerbations, and post-exacerbations) were used for QALY estimation. Utility decrements associated with exacerbation management [-0.1 (OCS or emergency visits), -0.2 (hospitalization)] derived from the literature were applied. Costs (€, 2022) included drug acquisition (ex-factory price), administration and disease management. An expert panel (2 pneumologists and 1 pharmacist) validated all inputs. RESULTS Benra was more effective (52.21 QALYs) than mepo (51.39 QALYs) and dupi (51.30 QALYs). Benra avoided more exacerbations (2.87 exacerbations) compared to mepo (4.70 exacerbations) and dupi (5.11 exacerbations) for the 5-year horizon. Total costs/patient were €56,093.77 (benra), €59,280.45 (mepo) and €62,991.76 (dupi), resulting in benra dominating (more QALYs with lower costs) vs. mepo and dupi. CONCLUSIONS Benralizumab can be considered as a dominant treatment alternative vs. other biologic drugs for the treatment of uncontrolled severe eosinophilic asthma patients in Spain.
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The Importance of Small Airway Dysfunction in Asthma. The GEMA-FORUM III Task Force. J Investig Allergol Clin Immunol 2021; 31:433-436. [PMID: 33720836 DOI: 10.18176/jiaci.0686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Conus venom fractions inhibit the adhesion of Plasmodium falciparum erythrocyte membrane protein 1 domains to the host vascular receptors. J Proteomics 2020; 234:104083. [PMID: 33373718 DOI: 10.1016/j.jprot.2020.104083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/28/2020] [Accepted: 12/20/2020] [Indexed: 11/16/2022]
Abstract
Using high-throughput BioPlex assays, we determined that six fractions from the venom of Conus nux inhibit the adhesion of various recombinant PfEMP-1 protein domains (PF08_0106 CIDR1α3.1, PF11_0521 DBL2β3, and PFL0030c DBL3X and DBL5e) to their corresponding receptors (CD36, ICAM-1, and CSA, respectively). The protein domain-receptor interactions permit P. falciparum-infected erythrocytes (IE) to evade elimination in the spleen by adhering to the microvasculature in various organs including the placenta. The sequences for the main components of the fractions, determined by tandem mass spectrometry, yielded four T-superfamily conotoxins, one (CC-Loop-CC) with I-IV, II-III connectivity and three (CC-Loop-CXaaC) with a I-III, II-IV connectivity. The 3D structure for one of the latter, NuxVA = GCCPAPLTCHCVIY, revealed a novel scaffold defined by double turns forming a hairpin-like structure stabilized by the two disulfide bonds. Two other main fraction components were a miniM conotoxin, and a O2-superfamily conotoxin with cysteine framework VI/VII. This study is the first one of its kind suggesting the use of conotoxins for developing pharmacological tools for anti-adhesion adjunct therapy against malaria. Similarly, mitigation of emerging diseases like AIDS and COVID-19, can also benefit from conotoxins as inhibitors of protein-protein interactions as treatment. BIOLOGICAL SIGNIFICANCE: Among the 850+ species of cone snail species there are hundreds of thousands of diverse venom exopeptides that have been selected throughout several million years of evolution to capture prey and deter predators. They do so by targeting several surface proteins present in target excitable cells. This immense biomolecular library of conopeptides can be explored for potential use as therapeutic leads against persistent and emerging diseases affecting non-excitable systems. We aim to expand the pharmacological reach of conotoxins/conopeptides by revealing their in vitro capacity to disrupt protein-protein and protein-polysaccharide interactions that directly contribute to pathology of Plasmodium falciparum malaria. This is significant for severe forms of malaria, which might be deadly even after treated with current parasite-killing drugs because of persistent cytoadhesion of P. falciparum infected erythrocytes even when parasites within red blood cells are dead. Anti-adhesion adjunct drugs would de-sequester or prevent additional sequestration of infected erythrocytes and may significantly improve survival of malaria patients. These results provide a lead for further investigations into conotoxins and other venom peptides as potential candidates for anti-adhesion or blockade-therapies. This study is the first of its kind and it suggests that conotoxins can be developed as pharmacological tools for anti-adhesion adjunct therapy against malaria. Similarly, mitigation of emerging diseases like AIDS and COVID-19, can also benefit from conotoxins as potential inhibitors of protein-protein interactions as treatment.
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Salud mental en estudiantes de pregrado de la Facultad de Medicina de la Universidad Nacional Mayor de San Marcos. ANALES DE LA FACULTAD DE MEDICINA 2019. [DOI: 10.15381/anales.v80i4.17142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Introducción. Estudios previos evidencian problemas de salud mental en estudiantes de pre-grado de la Facultad de Medicina de la Universidad Nacional Mayor de San Marcos (UNMSM). Objetivo. Evaluar si existen diferencias entre la frecuencia de problemas de salud mental entre los estudiantes de primer año, y el resto de años de estudio, en alumnos de las cinco escuelas profesionales de la Facultad de Medicina de la UNMSM. Métodos. Estudio transversal. Se utilizaron instrumentos validados para evaluar problemas de salud mental: intento suicida, pensamiento homicida, conducta disocial, problemas con el alcohol, depresión y angustia. Adicionalmente, se midieron niveles de resiliencia. Se incluyeron estudiantes de todas las escuelas profesionales de la Facultad de Medicina, en dos grupos de análisis: estudiantes de primer año y estudiantes de los otros años. Resultados. Se evidenció que en alumnos de primer año se encontró un 7,5% de intento suicida, 18,9% de conducta disocial y 21,9% de pensamiento homicida. Asimismo, se encontró un 4,8% de problemas con el alcohol, 8,5% de depresión y 3,2% de angustia. La frecuencia de problemas de salud mental fue mayor según transcurren los años de estudio, con diferencias estadísticamente significativas sólo en depresión, angustia y problemas con el alcohol. El 29,3% de encuestados tuvo bajo nivel de resiliencia. Conclusión. Se encontró frecuencias preocupantes de problemas de salud mental en los estudiantes de pregrado de la Facultad de Medicina de la UNMSM, aunque un porcentaje de alumnos ingresa a la universidad con problemas de salud mental. El entorno universitario sería factor agravante en depresión, ansiedad y problemas con el alcohol.
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Normative Data for Executive Function and Emotion Interaction Assessment in Adolescents from Rural Areas. Arch Clin Neuropsychol 2019. [DOI: 10.1093/arclin/acz029.19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Objective
The present work is part of the ongoing project of examining the validation and standardization of the Executive Functions and Emotion Assessment for Adolescents with Risk Behaviors (EFEAA) test in the rural areas of Northwest Mexico. The objectives of the present study were (1) to examine the effects of age and risk behavior on emotionally interfered working memory ability, measured as performance on the Emotionally Interfered Working Memory Task (EIWMT) section of the EFEAA in a group of healthy adolescents from rural areas; and (2) to use these results to construct normative data that can be used in clinical practice.
Participants and Method
A total of 275 adolescents, 14.1 years old, geographically distributed among northwest Mexico were included in the sample. They were individually assessed using the Montreal Cognitive Assessment, Risk Behavior Questionnaire, including: sexual risk behavior, impulsiveness, drug, alcohol, and tobacco consumption, unhealthy food intake, and physical inactivity; for measuring emotion-cognition interaction we used the EIWMT.
Results
Results of this study present a database supported by factors of risk behavior and working memory, which includes: predictors for conduct disorders, drug use, and delinquency, in addition to correlations between the performance of emotionally interfered working memory and risk behaviors associated to health. Percentile and normal distribution tables were generated, demonstrating that there is a high prevalence of risk behavior in rural areas.
Conclusions
This study demonstrates data related to rural areas in northwest Mexico, a region where adolescents are frequently involved in risk behaviors. Additionally, protective factors are understudied in Mexico-US border cities. Further analyses are needed to find reward delay skills on the studied sample as well as urban area comparisons.
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Asthma, Comorbidities, and Aggravating Circumstances: The GEMA-FORUM II Task Force. J Investig Allergol Clin Immunol 2019; 30:140-143. [PMID: 31599723 DOI: 10.18176/jiaci.0460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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P2.10-02 Smoking Habit in Lung Cancer in Spain. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Biomarker testing of lung cancer in Spain. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz266.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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P2.05-12 Analysis of Biomarkers in Lung Cancer in Spain. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Surgery specialization as a prognostic factor in colon cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Prevalencia y factores asociados a conducta suicida en estudiantes de la Universidad Nacional Mayor de San Marcos, Lima-Perú. ANALES DE LA FACULTAD DE MEDICINA 2019. [DOI: 10.15381/anales.v80i1.15865] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Introducción. La Organización Mundial de la Salud ha señalado el incremento de riesgo suicida en personas de 15 a 44 años, grupo etario en el que se ubican los estudiantes universitarios. Objetivo. Determinar prevalencias de conducta suicida y variables asociadas en estudiantes de pregrado de la Universidad Nacional Mayor de San Marcos (UNMSM), Lima-Perú. Métodos. Estudio analítico, transversal. La población objetivo fue de 24 118 estudiantes matriculados en 2015. Se aplicaron los instrumentos de conducta suicida de la Encuesta Nacional de Salud Mental en el Perú 2002 y 2012, las escalas de ansiedad y depresión de Zung y el cuestionario CAGE para problemas de alcohol, a una muestra de 1819 estudiantes obtenida mediante muestreo bietápico. Se estimaron prevalencias y se empleó regresión logística para determinar factores asociados. Resultados. Las prevalencias de vida, último año, últimos seis meses y último mes de los componentes de la conducta suicida fueron: deseos de morir (35%; 13,9%; 11% y 5,6%); ideación suicida (22,4%; 8,2%; 6% y 3,3%); plan suicida (17,7%; 4,4%; 3,5% y 1,6%); e intento suicida (11,1%; 3,7%; 2,8% y 1,4%). Los factores de riesgo en términos de odds ratio (OR) ajustados y sus IC 95% fueron: condición de mujer 1,48 (IC 95%: 1,03-2,12), depresión 2,46 (IC 95%: 1,49-4,06), angustia 2,5 (IC 95%: 1,38-4,6), y vivir en hogar no nuclear 2,51 (IC 95%: 1,70-3,72). De los estudiantes que intentaron suicidarse sólo 16% buscó ayuda profesional y 21% pensó repetir el intento. Conclusiones. Los estudiantes de la UNMSM tienen mayor riesgo de conducta suicida que los de la población en general, tanto por razones científicas como por responsabilidad moral se recomienda implementar estrategias de intervención para revertir esta tendencia y proteger a este valioso recurso humano.
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Streptococcus agalactiae: prevention and vaccine development. REVISTA ESPANOLA DE QUIMIOTERAPIA : PUBLICACION OFICIAL DE LA SOCIEDAD ESPANOLA DE QUIMIOTERAPIA 2017; 30:312-318. [PMID: 28945063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Streptococcus agalactiae, group B Streptococcus (SGB), is the most important cause of morbi-mortality among newborn population, and an important pathogen among immunossupressed adult patients. Despite the advances in the treatment and prevention of neonatal infections as a consequence of implementation of national and international recommendations for prevention of infection, there are still some improvements for the final control of the disease. In this sense, the vaccination against SGB could be an effective measure for the prevention of disease in those cases where intrapartum prophylaxis is not useful and in adult patients with risk factors for invasive infection due to SGB. This review summarizes the efforts made until now in order to establish the control of the infection, and brings some information on the current state-of-the art of vaccines against SGB, in which different strategies in their design have been used.
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High-Temperature Properties of Sodium for Safety Studies of Liquid-Metal Fast Breeder Reactors. NUCL SCI ENG 2017. [DOI: 10.13182/nse74-a23478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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P-130 Impact of age on efficacy of neoadjuvant chemoradiotherapy (CRT) in locally advanced rectal cancer (LARC). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw199.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Estrés, ansiedad y depresión en magistrados de Lima, Perú. Rev Peru Med Exp Salud Publica 2014. [DOI: 10.17843/rpmesp.2011.284.419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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The Cop9 signalosome: activity and regulation. Acta Crystallogr A 2013. [DOI: 10.1107/s0108767313099431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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[Stress, anxiety and depression in magistrates from Lima, Peru]. Rev Peru Med Exp Salud Publica 2011; 28:581-588. [PMID: 22241252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
OBJECTIVE To measure the general and work related stress, depression and anxiety in Magistrates (Judges and District Attorneys) of Lima Judicial District. MATERIAL AND METHODS We carried out a transversal and descriptive study. A population of 1137 magistrates from the Lima Jurisdictional District of the Judicial System, was randomly sampled by a strata representing every agency of the Judicial System. The final sample included 287 magistrates: 138 District Attorneys and 149 Judges. After informed consent, a questionnaire composed by four previously validated instruments was applied to measure general and work related stress, anxiety and depression. RESULTS General stress was present in 18.5 % of the participants; work related stress 33.7 %; anxiety 12.5 %, and depression 15 %. All three conditions were present in 6.6 % of the participants and at least one in 25.9 %. General stress was associated to depression (OR: 4.9; IC95 % 1.6-15.1) and anxiety (OR: 8.5; IC95 % 2.5-28.6) by logistic regression. CONCLUSION Lima Judicial District's Magistrates present a triad composed by high levels of labor stress, anxiety and depression. A quarter of the participants present at least one of those conditions. In that perspective, it is recommended that intervention and preventive programs address stress, anxiety and depression simultaneously, given their strong association.
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Inferring native range and invasion scenarios with mitochondrial DNA: the case of T. solanivora successive north–south step-wise introductions across Central and South America. Biol Invasions 2011. [DOI: 10.1007/s10530-010-9909-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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A simulation study of the vibration–rotational spectra of HCl diluted in Ar: Rotational dynamics and the origin of the Q-branch. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2009.09.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Depression and anxiety in cystic fibrosis: relation with quality of life. J Cyst Fibros 2010. [DOI: 10.1016/s1569-1993(10)60375-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Abstract
Protein products prepared from pooled human plasma are an essential class of therapeutics used mostly to control bleeding and/or immunological disorders. Because of the human origin of the starting material, there is a risk that these products may possibly transmit prions causing variant Creutzfeldt-Jakob disease (vCJD). No case of transmission of prions by plasma products has been observed. Case-by-case measures implemented in various countries, and several technical factors may contribute, to various degrees, to the prevention of the risk of transmission of prions by plasma products. Those measures include (a) the epidemiological surveillance of population in countries with cases of vCJD and/or bovine spongiform encephalopathies (BSE), (b) the deferral of blood donors who traveled or resided, for specific periods of time, to countries with BSE, or who received transfusion or tissue transplant, (c) the removal of leucocytes in plasma used for fractionation, and, last but not least, (d) the removal of the prion agents during the complex industrial fractionation process used to prepare plasma products. Numerous experimental infectivity studies, involving the spiking of brain-derived infectious materials, have demonstrated that several fractionation steps, in particular ethanol fractionation, depth filtration, and chromatography, can remove several logs of prions. Removal is explained by the distinct hydrophobic and aggregative properties of the prion proteins. In addition, nanofiltration using multi-layer membranes of 75 nm or smaller, which is commonly used for removing viruses from coagulation factors and immunoglobulins products, can remove more than 3-5 logs of spiked prions, presumably by size-exclusion and trapping mechanisms. Therefore, the risk of transmission of vCJD by human plasma products appears remote, but caution should prevail since the biochemical nature of the infectious agent in human blood is still unknown.
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International standards for minimum potency of anti-A and anti-B blood grouping reagents: evaluation of candidate preparations in an international collaborative study. Vox Sang 2006; 91:336-44. [PMID: 17105610 DOI: 10.1111/j.1423-0410.2006.00834.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND AND OBJECTIVES The aim of the study was to evaluate lyophilized monoclonal IgM anti-A and anti-B preparations for use as international standards (IS) to specify recommended minimum potencies of anti-A and anti-B blood grouping reagents in tube tests. MATERIALS AND METHODS The candidate IS for minimum potency of anti-A and anti-B blood grouping reagents, codes 03/188 and 03/164, respectively, were evaluated against a wide range of commercial anti-A and anti-B blood grouping reagents in an international collaborative study involving 16 laboratories in nine countries. Laboratories titrated 03/188 and 03/164 in parallel with as many commercial anti-A and anti-B blood grouping reagents, respectively, as were available to them, in tube tests according to specified haemagglutination methodology. Three of these laboratories and a further laboratory also titrated 03/188 and 03/164 in parallel with currently available reference preparations for anti-A and anti-B. The ratios of the mean endpoint titres of the anti-A and anti-B reagents to those of 03/188 and 03/164, respectively, within each laboratory were calculated. RESULTS The ratios of the mean titres of the anti-A reagents to the mean titre of 03/188 within a laboratory fell within 0.062 and 4, i.e. the potencies of the anti-A reagents were between a sixteenth to four times as strong as 03/188. The ratios of the mean titres of the anti-B reagents to the mean titre of 03/164 within a laboratory also fell within 0.062 and 4, with one outlier. CONCLUSIONS By international consensus, a 1 in 8 dilution of the candidate IS for anti-A, 03/188, and a 1 in 4 dilution of the candidate IS for anti-B, 03/164, were considered appropriate to define the recommended minimum potencies of anti-A and anti-B blood grouping reagents, respectively, in tube tests. On the basis of these results, preparations 03/188 and 03/164 were established by the World Health Organization as International Standards for Minimum Potency of Anti-A and Anti-B Blood Grouping Reagents respectively, and by the US Food and Drug Administration Center for Biologics Evaluation and Research as Minimum Potency Reference Reagents.
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An International Standard for specifying the minimum potency of anti-D blood-grouping reagents: evaluation of a candidate preparation in an international collaborative study. Vox Sang 2006; 90:131-9. [PMID: 16430672 DOI: 10.1111/j.1423-0410.2005.00735.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND AND OBJECTIVES The aim of this study was to evaluate a lyophilized monoclonal immunoglobulin M (IgM) anti-D preparation for use as an International Standard to specify a recommended minimum acceptable potency of anti-D blood-grouping reagents. MATERIALS AND METHODS The candidate International Standard (99/836) for specifying the minimum potency of anti-D blood-grouping reagents was evaluated against a wide range of commercial anti-D blood-grouping reagents in an international collaborative study involving 20 laboratories in 13 countries. Laboratories titrated reconstituted 99/836, in parallel with as many commercial anti-D blood-grouping reagents as were available to them, in tube tests according to specified haemagglutination methodology for low-protein (e.g. monoclonal IgM) and high-protein (e.g. polyclonal) reagents. The ratios of the mean end-point titres of the reagents to that of 99/836 within each laboratory were calculated. RESULTS The ratios of the mean titres of the low-protein reagents to the mean titre of 99/836 within a laboratory fell between 0.25 and 2 for 43 of the 45 low-protein anti-D reagents tested (i.e. the potencies of the low-protein reagents compared with 99/836 were between a 1:4 dilution of 99/836 to twice as potent as 99/836). The ratios of the mean titres of the high-protein reagents to the mean titre of 99/836 within a laboratory fell within 0.125 and 1 for eight out of the 10 high protein reagents tested. CONCLUSIONS By international consensus, a 1:3 dilution of reconstituted 99/836 was deemed appropriate to define a recommended minimum acceptable potency of low-protein anti-D blood-grouping reagents. A 1:8 dilution of reconstituted 99/836 was deemed appropriate to define a recommended minimum acceptable potency of high-protein anti-D blood-grouping reagents. On the basis of the results presented here, 99/836 was established by the World Health Organization as the 1st International Standard for specifying the minimum potency of anti-D blood-grouping reagents, in tube tests.
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[Fever of unknown origin (FUO), scintigraphy with Gallium 67 citrate scintigraphy and malignant lymphoma of soft tissues]. ACTA ACUST UNITED AC 2005; 23:427-8. [PMID: 15625062 DOI: 10.1016/s0212-6982(04)72334-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Experimental analysis and modified rotor description of the infrared fundamental band of HCl in Ar, Kr, and Xe solutions. J Chem Phys 2005; 122:194507. [PMID: 16161597 DOI: 10.1063/1.1902925] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report an experimental study of the rotovibrational fundamental PQR-band shapes in the IR absorption spectra of HCl dissolved in condensed rare gases in a wide range of temperatures. The effective vibrational frequencies are determined from analysis of the fine rotational structure partially resolved in the band wings. The central Q-branch components appear redshifted with respect to the effective vibrational frequencies, their shifts in different solvents found to match the HCl stretching mode shifts in binary Rg...HCl van der Waals heterodimers. Theoretical quasi-free rotor and modified rotor models are applied to describe evolution of the band profiles at changing thermodynamic conditions. Both models are shown to reproduce equally well the observed spectral density distributions in the band wings. However, the modified rotor formalism that accounts for depopulation of the lower-energy rotational solute states provides better agreement with the experiment in the range of the P- and R-branch maxima. We surmise that the Q branches separated from the measured spectral profiles are formed by transitions between rotationally hindered states of diatomic molecules coupled to the solvent by the local anisotropy of the interaction potential.
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Symptomatic hepatic polycystic disease and pregnancy. BJOG 2004; 111:1146-7. [PMID: 15383121 DOI: 10.1111/j.1471-0528.2004.00250.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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WHO Expert Committee on Biological Standardization. WORLD HEALTH ORGANIZATION TECHNICAL REPORT SERIES 2004; 924:1-232, backcover. [PMID: 15693660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
This report presents the recommendations of a WHO Expert Committee commissioned to coordinate activities leading to the adoption of international requirements for the production and control of vaccines and other biologicals and the establishment of international biological reference materials. The report starts with a discussion of general issues brought to the Committee's attention and provides information on the status and development of reference materials for various antibodies, antigens, blood products and related substances, cytokines, growth factors, and endocrinological substances. The second part of the report, of particular relevance to manufacturers and national regulatory authorities, contains recommendations for the production and quality control of meningococcal group C conjugate vaccines, guidelines for regulatory expectations for clinical evaluation of vaccines, guidelines for the production and quality control of inactivated oral cholera vaccines and guidelines on viral inactivation and removal procedures intended to assure the viral safety of human blood plasma products.
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Additions and Corrections - Ion Radicals. 45. Reactions of Zinc Tetraphenylporphyrin Cation Radical Percholate with Nucleophiles. J Org Chem 2003. [DOI: 10.1021/jo01314a611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Seroprevalence and risk factors for Trypanosoma cruzi infection in the Amazon region of Ecuador. Am J Trop Med Hyg 2003; 69:380-5. [PMID: 14640497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023] Open
Abstract
Trypanosoma cruzi infection in the Ecuadorian Amazon region has recently been reported. A seroepidemiologic survey conducted in four provinces in this region indicates a seroprevalence rate of 2.4% among the 6,866 samples collected in 162 communities. Among children < OR = 10 years of age, 1.2% were seropositive. Risk factors for T. cruzi seropositivity were having been born and remaining in the Ecuadorian Amazon provinces, age, living in a house with a thatch roof and open or mixed wall construction, recognizing the vector insects, and reporting being bitten by a triatomine bug. These data suggest active transmission of Chagas' disease in the Ecuadorian Amazon region is associated with poor housing conditions, and highlight the need for further studies aimed at understanding the biology of the insect vectors, reservoir species, and the clinical impact of T. cruzi infection as the basis for future educational and control programs in this region.
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[Infant mortality in Peru. Levels and trends, 1955-1990. Projections, 1990-2000]. REVISTA PERUANA DE POBLACION 2002:151-3. [PMID: 12318997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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39
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Rotational energy relaxation of polar diatomic molecules diluted in simple liquids. J Chem Phys 2002. [DOI: 10.1063/1.1505864] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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40
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Isotropic Raman scattering of HF in dense gas and liquid SF6: Study of the motional narrowing effect. J Chem Phys 2001. [DOI: 10.1063/1.1413962] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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41
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Structure of rat parvalbumin with deleted AB domain: implications for the evolution of EF hand calcium-binding proteins and possible physiological relevance. Proteins 2001; 45:117-28. [PMID: 11562941 DOI: 10.1002/prot.1131] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Among the EF-hand Ca(2+)-binding proteins, parvalbumin (PV) and calbindin D9k (CaB) have the function of Ca(2+) buffers. They evolved from an ancestor protein through two phylogenetic pathways, keeping one pair of EF-hands. They differ by the extra helix-loop-helix (AB domain) found in PV and by the linker between the binding sites. To investigate whether the deletion of AB in PV restores a CaB-like structure, we prepared and solved the structure of the truncated rat PV (PVratDelta37) by X-ray and NMR. PVratDelta37 keeps the PV fold, but is more compact, having a well-structured linker, which differs remarkably from CaB. PvratDelta37 has no stable apo-form, has lower affinity for Ca(2+) than full-length PV, and does not bind Mg(2+), in contrast to CaB. Structural differences of the hydrophobic core are partially responsible for lowering the calcium-binding affinity of the truncated protein. It can be concluded that the AB domain, like the linker of CaB, plays a role in structural stabilization. The AB domain of PV protects the hydrophobic core, and is required to maintain high affinity for divalent cation binding. Therefore, the AB domain possibly modulates PV buffer function.
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Abstract
The helper component of Cauliflower mosaic virus is encoded by viral gene II. This protein (P2) is dispensable for virus replication but required for aphid transmission. The purification of P2 has never been reported, and hence its biochemical properties are largely unknown. We produced the P2 protein via a recombinant baculovirus with a His tag fused at the N terminus. The fusion protein was purified by affinity chromatography in a soluble and biologically active form. Matrix-assisted laser desorption time-of-flight mass spectrometry demonstrated that P2 is not posttranslationally modified. UV circular dichroism revealed the secondary structure of P2 to be 23% alpha-helical. Most alpha-helices are suggested to be located in the C-terminal domain. Using size exclusion chromatography and aphid transmission testing, we established that the active form of P2 assembles as a huge soluble oligomer containing 200 to 300 subunits. We further showed that P2 can also polymerize as long paracrystalline filaments. We mapped P2 domains involved in P2 self-interaction, presumably through coiled-coil structures, one of which is proposed to form a parallel trimer. These regions have previously been reported to also interact with viral P3, another protein involved in aphid transmission. Possible interference between the two types of interaction is discussed with regard to the biological activity of P2.
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Abstract
OBJECTIVE To find out in child abusing mothers whether aggressiveness in general, but which is directed towards their children in particular, could be reduced by giving lithium. METHOD An open trial of lithium in eight child-abusing mothers. Assessment of aggression using Yudofsky's Overt Aggression Scale. RESULTS There was a statistically significant reduction (P < 0.05) in aggressiveness to the children and to inanimate objects. CONCLUSION Lithium could be an effective adjunct in the social and psychological treatment of parents who abuse their children. An adequately powered controlled study testing lithium against placebo over a longer period of treatment and observation would be useful.
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Kinetics and characterization of cellular responses in the peritoneal cavity of mice infected with Taenia crassiceps. J Parasitol 2001; 87:591-9. [PMID: 11426723 DOI: 10.1645/0022-3395(2001)087[0591:kacocr]2.0.co;2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Changes in the leukocyte population of the peritoneal cavity ensue immediately after infection with Taenia crassiceps metacestodes. Basophils and neutrophils decrease, whereas macrophages, monocytes, and lymphocytes increase to reach only modest levels by 6 wk and then diminish to nearly disappear by 15 wk when the parasite begins rapid reproduction. Eosinophils also appear early in infection, but then abate to lower levels that persist. In late infections, when the mass of cysticerci equals that of the mouse, the cysticerci grow among surprisingly few inflammatory cells. Mingling with the peritoneal inflammatory cells is a number of odd-looking cells that could correspond to the metaplasic mesothelial cells of the host or be of parasite origin. These cells are multinucleated, they aggregate in varigerated clusters, and form cystic structures in vitro; they also bind specific anti-T. crassiceps antibodies and specific T. crassiceps DNA probes in their nuclei. When the peritoneal cell exudate is reinjected intraperitoneally into naive mice, the odd-looking cells subsist for months, inducing in the host the synthesis of specific anti-T. crassiceps antibodies and immune resistance to challenge but do not reassemble into cysticerci even after 6 mo of inoculation. The early appearance and the immunogenic and antigenic properties of these odd-looking cells suggest they are important protagonists in the early host-parasite confrontation when the outcome of infection is set.
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Vibrorotational Raman and infrared spectra of polar diatomic molecules in inert solutions. III. Isotropic and anisotropic Raman spectra of HCl in liquid SF6. J Chem Phys 2000. [DOI: 10.1063/1.1288189] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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WHO Expert Committee on Biological Standardization: highlights of the 50th meeting, October 1999. Biologicals 2000; 28:199-206. [PMID: 10964448 DOI: 10.1006/biol.2000.0257] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Biological medicines, which include vaccines, blood products and biological therapeutics, have historically played a dominant role in improving world health and are expected to make an increasingly important contribution to public health in the 21st century. Recent scientific and biotechnological developments have opened the way to novel products, new production methods and to highly sensitive assay procedures. However, the nature of biologicals, and especially new vaccines, blood products and therapeutics, raises particular questions regarding their standardization and quality control. These relate both to efficacy and to safety not only for the individual recipient but also for the population at large. Such advances highlight the complex issues surrounding standardization and control of biologicals, issues that need to be addressed on an international level.
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Backbone dynamics and solution structure refinement of the 15N-labeled human oncogenic protein p13MTCP1: comparison with X-ray data. JOURNAL OF BIOMOLECULAR NMR 2000; 17:215-230. [PMID: 10959629 DOI: 10.1023/a:1008386110930] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Two related oncogenes, TCL1 and MTCP1, are overexpressed in certain T-cell prolymphocytic leukemias as a result of chromosomal rearrangements that involve the translocation of one T-cell receptor gene to either chromosome 14q32 or Xq28, respectively. The human oncoprotein p13MTCP1 is coded by the MTCP1 gene and its primary sequence is highly and only homologous to that of p14TCL1, the product of TCL1. These two proteins likely represent the first members of a new family of oncogenic proteins. A previous model of the three-dimensional solution structure of p13MTCP1 was determined recently using exclusively homonuclear proton two-dimensional NMR methods and, almost simultaneously, high-resolution crystal structures of p13MTCP1 and p14TCL1 appeared in the literature. In order to gain more insight into the details of the solution structure, we uniformly labeled p13MTCP1 with nitrogen-15. The refined structure benefits from 520 additional NOEs, extracted from either 15N-edited 3D experiments or homonuclear 2D NOESY recorded at 800 MHz, and from a nearly complete set of phi angular restraints. Measurements of 15N spin relaxation times and heteronuclear 15N[1H]NOEs at two magnetic field strengths provided additional insights into the dynamics of the protein backbone. On the basis of these new results, a putative binding surface for this particular class of oncogenes is discussed.
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Second order interference effects in the fundamental band spectra of HCl and DCl in liquid Xe. J Mol Liq 2000. [DOI: 10.1016/s0167-7322(99)00192-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Vibrorotational Raman and infrared spectra of polar diatomic molecules in inert solutions. II. Rotational spectroscopy of HCl in liquid SF6. J Chem Phys 1999. [DOI: 10.1063/1.480491] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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