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Nieves E, Cimino R, Krolewiecki A, Juarez M, Lanusse C, Alvarez L, Ceballos L. Albendazole metabolites excretion in human saliva as a biomarker to assess treatment compliance in mass drug administration (MDA) anthelmintic programs. Sci Rep 2024; 14:6271. [PMID: 38491091 PMCID: PMC10943003 DOI: 10.1038/s41598-024-56804-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 03/11/2024] [Indexed: 03/18/2024] Open
Abstract
Soil-transmitted-helminth (STH) infections continue to be a persistent global public health problem. Control strategies for STH have been based on the use of mass drug administration (MDA). Coverage and compliance assessment is critical to understanding the true effectiveness of albendazole (ABZ) in those MDA programs. The aims of this work were to characterize the pattern of albendazole and metabolites excretion in human saliva, and to develop a saliva-based biomarker (HPLC drug/metabolite detection) useful to accurately estimate the coverage/compliance in MDA campaigns. The study subjects were 12 healthy volunteers treated with a single oral dose of ABZ (400 mg). Saliva and blood (dried blood spot, DBS) samples were taken previously and between 2 and 72 h post-treatment. The samples were analyzed by HPLC with UV detection, C18 reversed-phase column. ABZ sulphoxide was the main analyte recovered up to 72 h p.t. in blood and saliva. The concentration profiles measured in the blood (DBS samples) were higher (P < 0.05) than those in saliva, however, this ABZ-metabolite was recovered longer in saliva. The in vivo measurement of drugs/metabolites in saliva samples from ABZ-treated volunteers offers strong scientific evidence to support the use of saliva as a valid biological sample for assessing compliance in MDA programs.
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Affiliation(s)
- E Nieves
- Facultad Regional Orán, Instituto de Investigaciones de Enfermedades Tropicales, Universidad Nacional de Salta, Orán, Salta, Argentina
| | - R Cimino
- Facultad Regional Orán, Instituto de Investigaciones de Enfermedades Tropicales, Universidad Nacional de Salta, Orán, Salta, Argentina
| | - A Krolewiecki
- Facultad Regional Orán, Instituto de Investigaciones de Enfermedades Tropicales, Universidad Nacional de Salta, Orán, Salta, Argentina
| | - M Juarez
- Facultad Regional Orán, Instituto de Investigaciones de Enfermedades Tropicales, Universidad Nacional de Salta, Orán, Salta, Argentina
| | - C Lanusse
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina
- Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Tandil, Buenos Aires, Argentina
| | - L Alvarez
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina
- Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Tandil, Buenos Aires, Argentina
| | - L Ceballos
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina.
- Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Tandil, Buenos Aires, Argentina.
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Alvarez L, Corrigan W, McGonegal C, Leon J, Avila D, Kane F, Lee T. The clinical manifestations of hyperostosis frontalis Interna: A qualitative systematic review of cases. Clin Anat 2024. [PMID: 38420744 DOI: 10.1002/ca.24147] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 02/03/2024] [Accepted: 02/15/2024] [Indexed: 03/02/2024]
Abstract
Hyperostosis frontalis interna (HFI) is a condition defined as abnormal bone growth on the posterior aspect of the frontal bone. Despite uncertainties regarding its etiology and prognosis, clinicians typically consider HFI a benign pathology. There are no studies organizing all the possible manifestations of the disease. The present study aims to organize all the clinical manifestations of HFI within the current case report/series literature. A blinded PRISMA-guided search of HFI case reports and case series yielded 43 relevant articles and provided 110 patients for analysis. The symptoms presenting alongside HFI were extracted and tabulated. We found high-frequency clinical manifestations of HFI (>20% of patients) to include headaches, obesity, vertigo/dizziness symptoms, cognitive decline, and depression. An additional 15 symptoms were tabulated at frequencies found to be less than 20%. Based on our analysis, we suggest the constellation of high-frequency symptoms can offer a more comprehensive clinical picture of symptomatic HFI which may be valuable to consider for clinicians and future researchers in the field of HFI.
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Affiliation(s)
| | | | | | - Jimmy Leon
- Advent Health Sebring, Sebring, Florida, USA
| | | | | | - Tracey Lee
- Advent Health Sebring, Sebring, Florida, USA
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Sánchez J, Alvarez L, López JF. Indication of Omalizumab for Chronic Urticaria Using the 'Urticaria Control Test' Instead of 'Urticaria Activity Score': Possible Impact for Health Systems. Actas Dermosifiliogr 2024; 115:T88-T90. [PMID: 37871896 DOI: 10.1016/j.ad.2023.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 06/26/2022] [Accepted: 10/17/2022] [Indexed: 10/25/2023] Open
Affiliation(s)
- J Sánchez
- Group of Clinical and Experimental Allergy, University of Antioquia, IPSU clinic, Medellín, Colombia.
| | - L Alvarez
- Pharmacoeconomic evaluation group, SURA Company
| | - J F López
- Group of Clinical and Experimental Allergy, University of Antioquia, IPSU clinic, Medellín, Colombia
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Roumieu PL, Siffredi J, Di Benedetto V, Alvarez L, Bailez MM. Results of transanal irrigation in intestinal dysfunction associated with anorectal malformations. Cir Pediatr 2024; 37:17-21. [PMID: 38180097 DOI: 10.54847/cp.2024.01.12] [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] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
INTRODUCTION There are multiple tools available to optimize defecation in patients with anorectal malformation (ARM), such as habits, laxatives, and retrograde or anterograde irrigations, which are usually adapted in a progressive and combined fashion. The objective of this study was to assess the incorporation of transanal irrigation (TAI) to constipation and fecal incontinence treatment in patients with ARM. MATERIALS AND METHODS A retrospective study of ARM patients with indication of TAI according to the colorectal pathology unit's intestinal management protocol from 2015 to 2022 was carried out. Following use for over 3 months, patients or their guardians completed a phone survey of our own approved by the ethics committee. RESULTS 39 ARM patients participated in the study. Pathologies included 11 rectourethral fistulas, 6 rectovesical fistulas, 16 cloacae, 2 rectovaginal fistulas, 2 perineal fistulas, and 2 vestibular fistulas. 44% of them had a sacral index < 0.4. 62% had constipation, and 38% had incontinence. Thanks to TAI, confidence and safety improved in a very high and a high degree in 89% of the patients, whereas time devoted to intestinal management decreased a lot in 68% of them. 79% reported a 9- and 10-point quality-of-life improvement. 92% rated overall satisfaction with TAI with a score of 8, 9, and 10 - 10 meaning "completely satisfied." 100% recommend TAI. CONCLUSION TAI is a good alternative for the intestinal management of fecal incontinence and constipation.
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Affiliation(s)
- P L Roumieu
- Hospital de Pediatría Prof. Dr. Juan P. Garrahan. Buenos Aires (Argentina)
| | - J Siffredi
- Hospital de Pediatría Prof. Dr. Juan P. Garrahan. Buenos Aires (Argentina)
| | - V Di Benedetto
- Hospital de Pediatría Prof. Dr. Juan P. Garrahan. Buenos Aires (Argentina)
| | - L Alvarez
- Hospital de Pediatría Prof. Dr. Juan P. Garrahan. Buenos Aires (Argentina)
| | - M M Bailez
- Hospital de Pediatría Prof. Dr. Juan P. Garrahan. Buenos Aires (Argentina)
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Sánchez J, Alvarez L, López JF. Indication of Omalizumab for Chronic Urticaria Using the 'Urticaria Control Test' Instead of 'Urticaria Activity Score': Possible Impact for Health Systems. Actas Dermosifiliogr 2024; 115:88-90. [PMID: 36754254 DOI: 10.1016/j.ad.2022.10.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 06/26/2022] [Accepted: 10/17/2022] [Indexed: 02/09/2023] Open
Affiliation(s)
- J Sánchez
- Group of Clinical and Experimental Allergy, University of Antioquia, IPSU Clinic, Medellín, Colombia.
| | - L Alvarez
- Pharmacoeconomic Evaluation Group, SURA Company, Colombia
| | - J F López
- Group of Clinical and Experimental Allergy, University of Antioquia, IPSU Clinic, Medellín, Colombia
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Alvarez L, Carhuaricra D, Palomino-Farfan J, Calle S, Maturrano L, Siuce J. Genomic Profiling of Multidrug-Resistant Swine Escherichia coli and Clonal Relationship to Human Isolates in Peru. Antibiotics (Basel) 2023; 12:1748. [PMID: 38136782 PMCID: PMC10740509 DOI: 10.3390/antibiotics12121748] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/01/2023] [Accepted: 12/04/2023] [Indexed: 12/24/2023] Open
Abstract
The misuse of antibiotics is accelerating antimicrobial resistance (AMR) in Escherichia coli isolated from farm animals. The genomes of ten multidrug-resistant (MDR) E. coli isolates from pigs were analyzed to determine their sequence types, serotypes, virulence, and AMR genes (ARGs). Additionally, the relationship was evaluated adding all the available genomes of Peruvian E. coli from humans using the cgMLST + HierCC scheme. Two aEPEC O186:H11-ST29 were identified, of which H11 and ST29 are reported in aEPEC isolates from different sources. An isolate ETEC-O149:H10-ST100 was identified, considered a high-risk clone that is frequently reported in different countries as a cause of diarrhea in piglets. One ExPEC O101:H11-ST167 was identified, for which ST167 is an international high-risk clone related to urinary infections in humans. We identified many ARGs, including extended-spectrum β-lactamase genes, and one ETEC harboring the mcr-1 gene. CgMLST + HierCC analysis differentiated three clusters, and in two, the human isolates were grouped with those of swine in the same cluster. We observed that Peruvian swine MDR E. coli cluster with Peruvian E. coli isolates from healthy humans and from clinical cases, which is of great public health concern and evidence that AMR surveillance should be strengthened based on the One Health approach.
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Affiliation(s)
- Luis Alvarez
- Laboratory of Veterinary Bacteriology and Mycology, Faculty of Veterinary Medicine, National University of San Marcos, Lima 15021, Peru; (L.A.); (J.P.-F.); (S.C.)
| | - Dennis Carhuaricra
- Research Group in Biotechnology Applied to Animal Health, Production and Conservation [SANIGEN], Laboratory of Biology and Molecular Genetics, Faculty of Veterinary Medicine, National University of San Marcos, Lima 15021, Peru; (D.C.); (L.M.)
| | - Joel Palomino-Farfan
- Laboratory of Veterinary Bacteriology and Mycology, Faculty of Veterinary Medicine, National University of San Marcos, Lima 15021, Peru; (L.A.); (J.P.-F.); (S.C.)
| | - Sonia Calle
- Laboratory of Veterinary Bacteriology and Mycology, Faculty of Veterinary Medicine, National University of San Marcos, Lima 15021, Peru; (L.A.); (J.P.-F.); (S.C.)
| | - Lenin Maturrano
- Research Group in Biotechnology Applied to Animal Health, Production and Conservation [SANIGEN], Laboratory of Biology and Molecular Genetics, Faculty of Veterinary Medicine, National University of San Marcos, Lima 15021, Peru; (D.C.); (L.M.)
| | - Juan Siuce
- Laboratory of Veterinary Bacteriology and Mycology, Faculty of Veterinary Medicine, National University of San Marcos, Lima 15021, Peru; (L.A.); (J.P.-F.); (S.C.)
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Morel JD, Morel JM, Alvarez L. Time warping between main epidemic time series in epidemiological surveillance. PLoS Comput Biol 2023; 19:e1011757. [PMID: 38150476 PMCID: PMC10775977 DOI: 10.1371/journal.pcbi.1011757] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 01/09/2024] [Accepted: 12/12/2023] [Indexed: 12/29/2023] Open
Abstract
The most common reported epidemic time series in epidemiological surveillance are the daily or weekly incidence of new cases, the hospital admission count, the ICU admission count, and the death toll, which played such a prominent role in the struggle to monitor the Covid-19 pandemic. We show that pairs of such curves are related to each other by a generalized renewal equation depending on a smooth time varying delay and a smooth ratio generalizing the reproduction number. Such a functional relation is also explored for pairs of simultaneous curves measuring the same indicator in two neighboring countries. Given two such simultaneous time series, we develop, based on a signal processing approach, an efficient numerical method for computing their time varying delay and ratio curves, and we verify that its results are consistent. Indeed, they experimentally verify symmetry and transitivity requirements and we also show, using realistic simulated data, that the method faithfully recovers time delays and ratios. We discuss several real examples where the method seems to display interpretable time delays and ratios. The proposed method generalizes and unifies many recent related attempts to take advantage of the plurality of these health data across regions or countries and time, providing a better understanding of the relationship between them. An implementation of the method is publicly available at the EpiInvert CRAN package.
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Affiliation(s)
- Jean-David Morel
- Laboratoire de Physiologie Intégrative et Systémique, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Jean-Michel Morel
- City University of Hong Kong, Department of Mathematics, Tat Chee Ave, Kowloon Tong, Hong Kong
| | - Luis Alvarez
- Departamento de Informática y Sistemas, Campus de Tafira, Universidad de Las Palmas de Gran Canaria, Spain
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Suárez G, Castells D, Imperiale F, Fagiolino P, Canton C, Lanusse C, Alvarez L. Therapeutic advantages of the combined use of closantel and moxidectin in lambs parasitized with resistant gastrointestinal nematodes. Int J Parasitol Drugs Drug Resist 2023; 23:28-36. [PMID: 37579583 PMCID: PMC10448036 DOI: 10.1016/j.ijpddr.2023.07.004] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/28/2023] [Accepted: 07/30/2023] [Indexed: 08/16/2023]
Abstract
The serious widespread development of nematode resistance has motivated the use of combined anthelmintic formulations. However, the advantages/disadvantages of the combined use of anthelmintics require further scientific characterization. The goals of the current trial were a) to characterize the pharmacokinetics of closantel (CLO) and moxidectin (MXD) administered both subcutaneously (sc) and orally either separately or co-administered (CLO + MXD) to lambs; b) to compare the nematodicidal activity of both molecules given individually or co-administered to lambs infected with resistant nematodes. Seventy (70) Corriedale lambs naturally infected with multiple resistant gastrointestinal nematodes were involved in the pharmacokinetic and efficacy trials. The animals were allocated into six groups (n = 10) and treated with either CLO, MXD, or with the CLO + MXD combined formulation by both the oral and sc routes. Additionally, an untreated control group (n = 10) was included for the efficacy trial. The efficacy was estimated by the faecal egg count reduction test (FECRT). Higher systemic exposure of both CLO and MXD was observed after the sc compared to the oral administration in lambs. The combined administration of CLO + MXD did not markedly alter their disposition kinetics. At 13 days post-treatment, the administration of both molecules as a single active principle reached efficacy levels ranging between 80% (MXDoral), 84% (CLOoral), 85% (CLOsc), and 92% (MXDsc). The combined oral and sc treatments reached 99% efficacy. No adverse effects were observed after the combined treatment of CLO + MXD, and their co-administration did not show any adverse pharmacokinetic interaction. The combined effect of CLO + MXD successfully restored the maximum efficacy levels, which were not reached by the individual active ingredients.
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Affiliation(s)
- Gonzalo Suárez
- Unidad de Farmacología y Terapéutica, Departamento de Clínicas y Hospital Veterinario, Facultad de Veterinaria, Universidad de la República (UDELAR), Montevideo, Uruguay.
| | - Daniel Castells
- Área de Investigación del Secretariado de la Lana, Florida, Uruguay
| | - Fernanda Imperiale
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Campus Universitario, (7000) Tandil, Argentina
| | - Pietro Fagiolino
- Departamento de Ciencias Farmacéuticas, Facultad de Química, Universidad de la República (UDELAR), Montevideo, Uruguay
| | - Candela Canton
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Campus Universitario, (7000) Tandil, Argentina
| | - Carlos Lanusse
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Campus Universitario, (7000) Tandil, Argentina
| | - Luis Alvarez
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Campus Universitario, (7000) Tandil, Argentina.
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Alvarez L, Kambham N, Su R. Renal improvement and remission in a patient with refractory ANCA-associated vasculitis treated with avacopan. J Nephrol 2023; 36:2365-2370. [PMID: 37036661 PMCID: PMC10638159 DOI: 10.1007/s40620-023-01614-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Accepted: 02/23/2023] [Indexed: 04/11/2023]
Abstract
Antineutrophil cytoplasmic autoantibody (ANCA)-associated vasculitis is associated with end-organ damage resulting in significant morbidity and mortality. Most recently, avacopan, an orally administered selective antagonist of the C5a receptor, was approved by the US Food and Drug Administration as an adjunctive treatment of adult patients with severe, active ANCA-associated vasculitis (granulomatosis with polyangiitis and microscopic polyangiitis) in combination with standard therapy including glucocorticoids. This case study describes a 58-year-old Asian female with severe ANCA-associated vasculitis and acute renal failure who responded to adjunctive therapy with avacopan despite being refractory to rituximab and glucocorticoid therapy.
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Affiliation(s)
- Luis Alvarez
- Division of Nephrology, Department of Medicine and Nephrology, Palo Alto Medical Foundation, Palo Alto, CA, USA.
| | - Neeraja Kambham
- Division of Renal Pathology, Stanford University, Stanford, CA, USA
| | - Robert Su
- Division of Rheumatology, Sutter Health System, Fremont, CA, USA
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Canton C, Canton L, Lifschitz A, Paula Dominguez M, Alvarez L, Ceballos L, Mate L, Lanusse C, Ballent M. Monepantel-based anthelmintic combinations to optimize parasite control in cattle. Int J Parasitol 2023; 53:441-449. [PMID: 36963744 DOI: 10.1016/j.ijpara.2023.02.001] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 02/19/2023] [Accepted: 02/21/2023] [Indexed: 03/26/2023]
Abstract
Improvement in the use of existing anthelmintics is a high priority need for the pharmaco-parasitology research field, considering the magnitude and severity of anthelmintic resistance as an important issue in livestock production. In the work described here, monepantel (MNP) was given alone or co-administered with either macrocyclic lactone (ML) or benzimidazole (BZ) anthelmintics to calves naturally infected with ML- and BZ-resistant gastrointestinal (GI) nematodes on two different commercial cattle farms. Both pharmacokinetic (PK) and efficacy assessments were performed. On Farm A, male calves (n = 15 per group) were treated with either MNP orally (2.5 mg/kg), IVM s.c. (0.2 mg/kg), ricobendazole (RBZ) s.c. (3.75 mg/kg) or remained untreated. On Farm B, eight groups (n = 15) of male calves received treatment with either: MNP, abamectin (ABM, oral, 0.2 mg/kg), RBZ (s.c., 3.75 mg/kg), albendazole (ABZ, oral, 5 mg/kg), MNP+ABM, MNP+RBZ, MNP+ABZ (all at the above-mentioned routes and doses) or remained untreated. Seven animals from each treated group (Farm B) were randomly selected to perform the PK study. MNP and its metabolite monepantel sulphone (MNPSO2) were the main analytes recovered in plasma after HPLC analysis. The combined treatments resulted in decreased systemic exposures to MNP parent drug compared with that observed after treatment with MNP alone (P < 0.05). However, the systemic availability of the main MNP metabolite (MNPSO2) was unaffected by co-administration with either ABM, RBZ or ABZ. Efficacies of 98% (Farm A) and 99% (Farm B) demonstrated the high efficacy of MNP given alone (P < 0.05) against GI nematodes resistant to ML and BZ in cattle. While the ML (IVM, ABM) failed to control Haemonchus spp., Cooperia spp. and Ostertagia spp., MNP achieved 99% to 100% efficacy against those nematode species on both commercial farms. However, MNP alone failed to control Oesophagostomum spp. (60% efficacy) on Farm A. The co-administered treatments MNP+ABZ and MNP+RBZ reached a 100% reduction against all GI nematode genera. In conclusion, the oral treatment with MNP should be considered to deal with resistant nematode parasites in cattle. The use of MNP in combination with BZ compounds could be a valid strategy to extend its lifespan for use in cattle as well as to reverse its poor activity against Oesophagostomum spp.
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Affiliation(s)
- Candela Canton
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CONICET-CICPBA, Campus Universitario, Tandil, Buenos Aires, Argentina; Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Ciencias Veterinarias, Campus Universitario, Tandil, Buenos Aires, Argentina.
| | - Lucila Canton
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CONICET-CICPBA, Campus Universitario, Tandil, Buenos Aires, Argentina; Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Ciencias Veterinarias, Campus Universitario, Tandil, Buenos Aires, Argentina
| | - Adrian Lifschitz
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CONICET-CICPBA, Campus Universitario, Tandil, Buenos Aires, Argentina; Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Ciencias Veterinarias, Campus Universitario, Tandil, Buenos Aires, Argentina
| | - Maria Paula Dominguez
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CONICET-CICPBA, Campus Universitario, Tandil, Buenos Aires, Argentina; Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Ciencias Veterinarias, Campus Universitario, Tandil, Buenos Aires, Argentina
| | - Luis Alvarez
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CONICET-CICPBA, Campus Universitario, Tandil, Buenos Aires, Argentina; Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Ciencias Veterinarias, Campus Universitario, Tandil, Buenos Aires, Argentina
| | - Laura Ceballos
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CONICET-CICPBA, Campus Universitario, Tandil, Buenos Aires, Argentina; Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Ciencias Veterinarias, Campus Universitario, Tandil, Buenos Aires, Argentina
| | - Laura Mate
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CONICET-CICPBA, Campus Universitario, Tandil, Buenos Aires, Argentina; Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Ciencias Veterinarias, Campus Universitario, Tandil, Buenos Aires, Argentina
| | - Carlos Lanusse
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CONICET-CICPBA, Campus Universitario, Tandil, Buenos Aires, Argentina; Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Ciencias Veterinarias, Campus Universitario, Tandil, Buenos Aires, Argentina
| | - Mariana Ballent
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CONICET-CICPBA, Campus Universitario, Tandil, Buenos Aires, Argentina; Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Ciencias Veterinarias, Campus Universitario, Tandil, Buenos Aires, Argentina
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Morel JD, Morel JM, Alvarez L. Learning from the past: A short term forecast method for the COVID-19 incidence curve. PLoS Comput Biol 2023; 19:e1010790. [PMID: 37343039 DOI: 10.1371/journal.pcbi.1010790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 05/22/2023] [Indexed: 06/23/2023] Open
Abstract
The COVID-19 pandemy has created a radically new situation where most countries provide raw measurements of their daily incidence and disclose them in real time. This enables new machine learning forecast strategies where the prediction might no longer be based just on the past values of the current incidence curve, but could take advantage of observations in many countries. We present such a simple global machine learning procedure using all past daily incidence trend curves. Each of the 27,418 COVID-19 incidence trend curves in our database contains the values of 56 consecutive days extracted from observed incidence curves across 61 world regions and countries. Given a current incidence trend curve observed over the past four weeks, its forecast in the next four weeks is computed by matching it with the first four weeks of all samples, and ranking them by their similarity to the query curve. Then the 28 days forecast is obtained by a statistical estimation combining the values of the 28 last observed days in those similar samples. Using comparison performed by the European Covid-19 Forecast Hub with the current state of the art forecast methods, we verify that the proposed global learning method, EpiLearn, compares favorably to methods forecasting from a single past curve.
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Affiliation(s)
- Jean-David Morel
- Laboratory of Integrative Systems Physiology, Ecole Polytechnique Fédérale de Lausanne, EPFL/IBI/LISP Lausanne, Switzerland
| | - Jean-Michel Morel
- ENS Paris-Saclay, CNRS, Centre Borelli, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Luis Alvarez
- Departamento de Informática y Sistemas, Universidad de Las Palmas de G.C., Las Palmas de G.C., Spain
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Lara-Hernandez F, Alvarez L, Chaves J, Garcia-Garcia AB. Molecular Research on Genes Involved in Metabolic Diseases. Biomedicines 2023; 11:1671. [PMID: 37371766 DOI: 10.3390/biomedicines11061671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
Numerous genes involved in different metabolic diseases have been identified, and this number is increasing [...].
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Affiliation(s)
| | - Luis Alvarez
- Genomic and Diabetes Unit, INCLIVA Biomedical Research Institute, 46021 Valencia, Spain
| | - Javier Chaves
- Genomic and Diabetes Unit, INCLIVA Biomedical Research Institute, 46021 Valencia, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), ISCIII, 28029 Madrid, Spain
| | - Ana-Barbara Garcia-Garcia
- Genomic and Diabetes Unit, INCLIVA Biomedical Research Institute, 46021 Valencia, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), ISCIII, 28029 Madrid, Spain
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13
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Ceballos L, Alvarez L, Lifschitz A, Lanusse C. Ivermectin systemic availability in adult volunteers treated with different oral pharmaceutical formulations. Biomed Pharmacother 2023; 160:114391. [PMID: 36804122 DOI: 10.1016/j.biopha.2023.114391] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/28/2023] [Accepted: 02/08/2023] [Indexed: 02/17/2023] Open
Abstract
Ivermectin (IVM) is currently approved as an antiparasitic agent for human use in the treatment of onchocerciasis, lymphatic filariasis, strongyloidiasis, scabies, and pediculosis. Recent findings indicate that IVM may reach other pharmacological targets, which accounts for its proven anti-inflammatory/immunomodulatory, cytostatic, and antiviral effects. However, little is known about the assessment of alternative drug formulations for human use. OBJECTIVE To compare the systemic availability and disposition kinetics of IVM orally administered as different pharmaceutical formulations (tablet, solution, or capsule) to healthy adults. EXPERIMENTAL DESIGN/MAIN FINDINGS Volunteers were randomly assigned to 1 of 3 experimental groups and orally treated with IVM as either, a tablet, solution, or capsules at 0.4 mg/kg in a three-phase crossover design. Blood samples were taken as dried blood spots (DBS) between 2 and 48 h post-treatment and IVM was analyzed by HPLC with fluorescence detection. IVM Cmax value was higher (P < 0.05) after the administration of the oral solution compared to treatments with both solid preparations. The oral solution resulted in a significantly higher IVM systemic exposure (AUC: 1653 ng h/mL) compared to the tablet (1056 ng h/mL) and capsule (996 ng h/mL) formulations. The simulation of a 5-day repeated administration for each formulation did not show a significant systemic accumulation. CONCLUSION Beneficial effects against systemically located parasitic infections as well as in any other potential therapeutic field of IVM application would be expected from its use in the form of oral solution. This pharmacokinetic-based therapeutic advantage without the risk of excessive accumulation needs to be corroborated in clinical trials specifically designed for each purpose.
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Affiliation(s)
- L Ceballos
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina; Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Ciencias Veterinarias, Tandil, Buenos Aires, Argentina.
| | - L Alvarez
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina; Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Ciencias Veterinarias, Tandil, Buenos Aires, Argentina
| | - A Lifschitz
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina; Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Ciencias Veterinarias, Tandil, Buenos Aires, Argentina
| | - C Lanusse
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina; Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Ciencias Veterinarias, Tandil, Buenos Aires, Argentina
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Bonnard E, Liu J, Zjacic N, Alvarez L, Scholz M. Automatically tracking feeding behavior in populations of foraging C. elegans. eLife 2022; 11:e77252. [PMID: 36083280 PMCID: PMC9462848 DOI: 10.7554/elife.77252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 08/15/2022] [Indexed: 11/13/2022] Open
Abstract
Caenorhabditis elegans feeds on bacteria and other small microorganisms which it ingests using its pharynx, a neuromuscular pump. Currently, measuring feeding behavior requires tracking a single animal, indirectly estimating food intake from population-level metrics, or using restrained animals. To enable large throughput feeding measurements of unrestrained, crawling worms on agarose plates at a single worm resolution, we developed an imaging protocol and a complementary image analysis tool called PharaGlow. We image up to 50 unrestrained crawling worms simultaneously and extract locomotion and feeding behaviors. We demonstrate the tool's robustness and high-throughput capabilities by measuring feeding in different use-case scenarios, such as through development, with genetic and chemical perturbations that result in faster and slower pumping, and in the presence or absence of food. Finally, we demonstrate that our tool is capable of long-term imaging by showing behavioral dynamics of mating animals and worms with different genetic backgrounds. The low-resolution fluorescence microscopes required are readily available in C. elegans laboratories, and in combination with our python-based analysis workflow makes this methodology easily accessible. PharaGlow therefore enables the observation and analysis of the temporal dynamics of feeding and locomotory behaviors with high-throughput and precision in a user-friendly system.
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Affiliation(s)
- Elsa Bonnard
- Max Planck Research Group Neural Information Flow, Max Planck Institute for Neurobiology of Behavior – caesarBonnGermany
| | - Jun Liu
- Max Planck Research Group Neural Information Flow, Max Planck Institute for Neurobiology of Behavior – caesarBonnGermany
| | - Nicolina Zjacic
- Max Planck Research Group Neural Information Flow, Max Planck Institute for Neurobiology of Behavior – caesarBonnGermany
- Institute of Medical Genetics, University of ZurichZurichSwitzerland
| | - Luis Alvarez
- Max Planck Research Group Neural Information Flow, Max Planck Institute for Neurobiology of Behavior – caesarBonnGermany
| | - Monika Scholz
- Max Planck Research Group Neural Information Flow, Max Planck Institute for Neurobiology of Behavior – caesarBonnGermany
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15
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Quast T, Zölzer K, Guu D, Alvarez L, Küsters C, Kiermaier E, Kaupp UB, Kolanus W. A Stable Chemokine Gradient Controls Directional Persistence of Migrating Dendritic Cells. Front Cell Dev Biol 2022; 10:943041. [PMID: 36016652 PMCID: PMC9395945 DOI: 10.3389/fcell.2022.943041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 06/21/2022] [Indexed: 11/13/2022] Open
Abstract
Navigation of dendritic cells (DCs) from the site of infection to lymphoid organs is guided by concentration gradients of CCR7 ligands. How cells interpret chemokine gradients and how they couple directional sensing to polarization and persistent chemotaxis has remained largely elusive. Previous experimental systems were limited in the ability to control fast de novo formation of the final gradient slope, long-lasting stability of the gradient and to expose cells to dynamic stimulation. Here, we used a combination of microfluidics and quantitative in vitro live cell imaging to elucidate the chemotactic sensing strategy of DCs. The microfluidic approach allows us to generate soluble gradients with high spatio-temporal precision and to analyze actin dynamics, cell polarization, and persistent directional migration in both static and dynamic environments. We demonstrate that directional persistence of DC migration requires steady-state characteristics of the soluble gradient instead of temporally rising CCL19 concentration, implying that spatial sensing mechanisms control chemotaxis of DCs. Kymograph analysis of actin dynamics revealed that the presence of the CCL19 gradient is essential to stabilize leading edge protrusions in DCs and to determine directionality, since both cytoskeletal polarization and persistent chemotaxis are abrogated in the range of seconds when steady-state gradients are perturbed. In contrast to Dictyostelium amoeba, DCs are unable to decode oscillatory stimulation of soluble chemokine traveling waves into a directional response toward the wave source. These findings are consistent with the notion that DCs do not employ adaptive temporal sensing strategies that discriminate temporally increasing and decreasing chemoattractant concentrations in our setting. Taken together, in our experimental system DCs do not depend on increasing absolute chemokine concentration over time to induce persistent migration and do not integrate oscillatory stimulation. The observed capability of DCs to migrate with high directional persistence in stable gradients but not when subjected to periodic temporal cues, identifies spatial sensing as a key requirement for persistent chemotaxis of DCs.
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Affiliation(s)
- Thomas Quast
- Molecular Immunology and Cell Biology, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
| | - Karolin Zölzer
- Molecular Immunology and Cell Biology, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
| | - Donald Guu
- Molecular Sensory Systems, Max Planck Institute for Neurobiology of Behavior—Caesar, Bonn, Germany
| | - Luis Alvarez
- Molecular Sensory Systems, Max Planck Institute for Neurobiology of Behavior—Caesar, Bonn, Germany
| | - Carsten Küsters
- Molecular Immunology and Cell Biology, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
| | - Eva Kiermaier
- Immune and Tumor Biology, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
| | - U. Benjamin Kaupp
- Molecular Sensory Systems, Max Planck Institute for Neurobiology of Behavior—Caesar, Bonn, Germany
| | - Waldemar Kolanus
- Molecular Immunology and Cell Biology, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
- *Correspondence: Waldemar Kolanus,
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Nenninger AW, Willman M, Willman J, Stewart E, Mesidor P, Novoa M, Morrill NK, Alvarez L, Joly-Amado A, Peters MM, Gulick D, Nash KR. Improving Gene Therapy for Angelman Syndrome with Secreted Human UBE3A. Neurotherapeutics 2022; 19:1329-1339. [PMID: 35534672 PMCID: PMC9587189 DOI: 10.1007/s13311-022-01239-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/10/2022] [Indexed: 11/27/2022] Open
Abstract
The rare genetic neurodevelopmental disease Angelman syndrome (AS) is caused by the loss of function of UBE3A, a ubiquitin ligase. The disease results in a lifetime of severe symptoms, including intellectual disability and motor impairments for which there are no effective treatments. One avenue of treatment for AS is the use of gene therapy to reintroduce a functional copy of the UBE3A gene. Our group had previously shown that recombinant adeno-associated virus (rAAV) expressing mouse Ube3a could rescue deficits in a mouse model of AS. Here, we expand on this work and show that this approach could be successfully replicated in a second AS model using the human UBE3A gene. Furthermore, we address the challenge of limited vector distribution in the brain by developing a novel modified form of UBE3A. This modified protein, termed STUB, was designed with a secretion signal and a cell-penetrating peptide. This allowed transduced cells to act as factories for the production of UBE3A protein that could be taken up by neighboring non-transduced cells, thus increasing the number of neurons receiving the therapeutic protein. Combining this construct with intracerebroventricular injections to maximize rAAV distribution within the brain, we demonstrate that this novel approach improves the recovery of behavioral and electrophysiological deficits in the AS rat model. More importantly, a comparison of rAAV-STUB to a rAAV expressing the normal human UBE3A gene showed that STUB was a more effective therapeutic. These data suggest that rAAV-STUB is a new potential approach for the treatment of AS.
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Affiliation(s)
- Austin W Nenninger
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd, Tampa, FL-33612, USA
| | - Matthew Willman
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd, Tampa, FL-33612, USA
| | - Jonathan Willman
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd, Tampa, FL-33612, USA
| | - Emma Stewart
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd, Tampa, FL-33612, USA
| | - Philippe Mesidor
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd, Tampa, FL-33612, USA
| | - Michelle Novoa
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd, Tampa, FL-33612, USA
| | - Nicole K Morrill
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd, Tampa, FL-33612, USA
| | - Luis Alvarez
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd, Tampa, FL-33612, USA
| | - Aurélie Joly-Amado
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd, Tampa, FL-33612, USA
| | - Melinda M Peters
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd, Tampa, FL-33612, USA
| | - Danielle Gulick
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd, Tampa, FL-33612, USA
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd, Tampa, FL-33612, USA
| | - Kevin R Nash
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd, Tampa, FL-33612, USA.
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Canton L, Signorini M, Canton C, Dominguez P, Farias C, Alvarez L, Lanusse C, Moreno L. Quantitative exposure assessment and risk characterization for fipronil residues in laying hen eggs. J Food Sci 2022; 87:2775-2788. [PMID: 35534087 DOI: 10.1111/1750-3841.16161] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 03/29/2022] [Accepted: 03/31/2022] [Indexed: 11/28/2022]
Abstract
Poultry production is linked to veterinary drug use to treat diseases. Few ectoparasitic compounds are approved for poultry. Fipronil is a pesticide widely used in agriculture. It is also a drug authorized to control ectoparasites in small animals and, in some countries, in cattle. There has been evidence of fipronil extra-label use in laying hens, mainly to control the red mite Dermanyssus gallinae. Fipronil's popularity is due to its high toxicity to invertebrates. It could be metabolized to more toxic metabolites that potentially damage human health. In the present study, we carry out a quantitative exposure assessment and risk characterization for fipronil residues in laying hen eggs for local consumption in five cities of Buenos Aires province in Argentina, namely, Azul, Balcarce, Juarez, Chaves, and Tandil. Consumption surveys and egg sampling were conducted for three summer periods. Eggs were analyzed by UFLC-MS-MS. Fipronil prevalence, residue concentrations, residue stability to cooking methods, egg consumption, among the most important variables were modeled. The results indicated that 20.7% of samples contained fipronil residues. The highest residue was fipronil sulfone metabolite. Fipronil concentrations quantified ranged between 10 and 2510 ppb (median value = 150 ppb). When eggs were cooked, fipronil residues were stable. The exposure assessment and risk characterization revealed that the highest probability of consuming eggs with fipronil residues above the admissible limits was for young adults (20.8%), followed by babies (16.9%), young children (16.4%), children (13.4%), teenagers (10.3%), older adults (9.41%), and adults (8.65%). These results suggest an unacceptable risk associated with egg consumption with fipronil residues for all age groups. PRACTICAL APPLICATION: Fipronil is widely used as an extra-label way on laying hens since its use is prohibited in poultry production both in Argentina and in most countries. This molecule has been classified as Class II, a moderately hazardous pesticide because it could damage various human organs. Fipronil residues in eggs could be one of the exposure pathways for consumers. Monitoring residual levels and carrying out the health risk assessment in eggs are thus in an urge.
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Affiliation(s)
- Lucila Canton
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), Facultad de Ciencias Veterinarias, UNCPBA-CICPBA-CONICET, Tandil, Argentina
| | - Marcelo Signorini
- Departamento de Salud Pública, Facultad de Ciencias Veterinarias, Universidad Nacional del Litoral, Esperanza, Argentina.,Consejo Nacional de Investigación Científica y Técnica (CONICET), Instituto Nacional de Tecnología Agropecuaria (INTA) EEA Rafaela, Rafaela, Argentina
| | - Candela Canton
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), Facultad de Ciencias Veterinarias, UNCPBA-CICPBA-CONICET, Tandil, Argentina
| | - Paula Dominguez
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), Facultad de Ciencias Veterinarias, UNCPBA-CICPBA-CONICET, Tandil, Argentina
| | - Cristina Farias
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), Facultad de Ciencias Veterinarias, UNCPBA-CICPBA-CONICET, Tandil, Argentina
| | - Luis Alvarez
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), Facultad de Ciencias Veterinarias, UNCPBA-CICPBA-CONICET, Tandil, Argentina
| | - Carlos Lanusse
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), Facultad de Ciencias Veterinarias, UNCPBA-CICPBA-CONICET, Tandil, Argentina
| | - Laura Moreno
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), Facultad de Ciencias Veterinarias, UNCPBA-CICPBA-CONICET, Tandil, Argentina
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Walser-Kuntz D, Wang H, Alvarez L, Intasin P. Effect of BPA on cytokine expression and regeneration in larval zebrafish. The Journal of Immunology 2022. [DOI: 10.4049/jimmunol.208.supp.163.09] [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: 01/03/2023]
Abstract
Abstract
Bisphenol-A (BPA) binds to estrogen receptors ER-α and β and is used in the production of polycarbonate plastic and epoxy resins. BPA presents a potential environmental challenge to the immune system of both humans and wildlife due to its use in food containers and thermal receipts and its resulting presence in surface water and wastewater runoff. We observed that BPA exposure downregulates the expression of the chemokine that functions to recruit neutrophils in both mice (KC) and zebrafish (cxcl8) and that it decreases neutrophil recruitment to the injury site in MPO::GFP zebrafish. Neutrophils are essential for the removal of damaged tissue and invading microbes, thus facilitating tissue regeneration of the tail fin. To investigate BPA’s effects on larval zebrafish tail regeneration, we induced a tail injury at day 3 post fertilization (dpf) and measured tail fin growth at day 1 and 3 post injury (dpi). Fish exposed to 100 ng/ml BPA regenerate a smaller tail fin area at 3 dpi (p-value < 0.01). We hypothesized that BPA exposure and altered neutrophil recruitment could affect regeneration by directly altering the expression of regeneration-related genes wnt10a and il-10 or their downstream genes and/or indirectly by regulating inflammatory genes including il-1 and il-6. The expression of il-1, il-6, il-10, and wnt10a were detected in zebrafish embryos from 2–6 dpf using qPCR. BPA exposure reduces both il-1 and il-6 expression 3 hours post-injury, suggesting that BPA reduces the inflammatory response. To determine whether BPA alters gene expression of wnt10a, il-10, or their downstream-regulated genes qPCR will be performed at 24- and 72-hours post-injury.
Supported by Carleton College.
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Robles CD, Molina M, Martinez CA, Alvarez L. Ecological implications of variable energy storage in the keystone predator,
Pisaster ochraceus. Ecosphere 2021. [DOI: 10.1002/ecs2.3882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Carlos D. Robles
- Department of Biology California State University Los Angeles California 90032 USA
| | - Mayra Molina
- Department of Biology California State University Los Angeles California 90032 USA
| | - Carlos Alan Martinez
- Department of Biology California State University Los Angeles California 90032 USA
| | - Luis Alvarez
- Department of Biology California State University Los Angeles California 90032 USA
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Alvarez L, Colom M, Morel JD, Morel JM. Computing the daily reproduction number of COVID-19 by inverting the renewal equation using a variational technique. Proc Natl Acad Sci U S A 2021; 118:e2105112118. [PMID: 34876517 PMCID: PMC8685677 DOI: 10.1073/pnas.2105112118] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/11/2021] [Indexed: 12/20/2022] Open
Abstract
The COVID-19 pandemic has undergone frequent and rapid changes in its local and global infection rates, driven by governmental measures or the emergence of new viral variants. The reproduction number Rt indicates the average number of cases generated by an infected person at time t and is a key indicator of the spread of an epidemic. A timely estimation of Rt is a crucial tool to enable governmental organizations to adapt quickly to these changes and assess the consequences of their policies. The EpiEstim method is the most widely accepted method for estimating Rt But it estimates Rt with a significant temporal delay. Here, we propose a method, EpiInvert, that shows good agreement with EpiEstim, but that provides estimates of Rt several days in advance. We show that Rt can be estimated by inverting the renewal equation linking Rt with the observed incidence curve of new cases, it Our signal-processing approach to this problem yields both Rt and a restored it corrected for the "weekend effect" by applying a deconvolution and denoising procedure. The implementations of the EpiInvert and EpiEstim methods are fully open source and can be run in real time on every country in the world and every US state.
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Affiliation(s)
- Luis Alvarez
- Centro de Tecnologías de la Imagen, Departamento de Informática y Sistemas, Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, Spain;
| | - Miguel Colom
- Centre Borelli, Université Paris-Saclay, École Normale Supérieure Paris-Saclay, CNRS, F-91190 Gif-sur-Yvette, France
| | - Jean-David Morel
- Laboratoire de Physiologie Intégrative et Systémique, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Jean-Michel Morel
- Centre Borelli, Université Paris-Saclay, École Normale Supérieure Paris-Saclay, CNRS, F-91190 Gif-sur-Yvette, France
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21
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Alvarez L, Colom M, Morel JD, Morel JM. Computing the daily reproduction number of COVID-19 by inverting the renewal equation using a variational technique. Proc Natl Acad Sci U S A 2021. [PMID: 34876517 DOI: 10.1073/pnas.210511211] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023] Open
Abstract
The COVID-19 pandemic has undergone frequent and rapid changes in its local and global infection rates, driven by governmental measures or the emergence of new viral variants. The reproduction number Rt indicates the average number of cases generated by an infected person at time t and is a key indicator of the spread of an epidemic. A timely estimation of Rt is a crucial tool to enable governmental organizations to adapt quickly to these changes and assess the consequences of their policies. The EpiEstim method is the most widely accepted method for estimating Rt But it estimates Rt with a significant temporal delay. Here, we propose a method, EpiInvert, that shows good agreement with EpiEstim, but that provides estimates of Rt several days in advance. We show that Rt can be estimated by inverting the renewal equation linking Rt with the observed incidence curve of new cases, it Our signal-processing approach to this problem yields both Rt and a restored it corrected for the "weekend effect" by applying a deconvolution and denoising procedure. The implementations of the EpiInvert and EpiEstim methods are fully open source and can be run in real time on every country in the world and every US state.
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Affiliation(s)
- Luis Alvarez
- Centro de Tecnologías de la Imagen, Departamento de Informática y Sistemas, Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, Spain;
| | - Miguel Colom
- Centre Borelli, Université Paris-Saclay, École Normale Supérieure Paris-Saclay, CNRS, F-91190 Gif-sur-Yvette, France
| | - Jean-David Morel
- Laboratoire de Physiologie Intégrative et Systémique, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Jean-Michel Morel
- Centre Borelli, Université Paris-Saclay, École Normale Supérieure Paris-Saclay, CNRS, F-91190 Gif-sur-Yvette, France
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Alvarez L, Fernandez-Rodriguez MA, Alegria A, Arrese-Igor S, Zhao K, Kröger M, Isa L. Reconfigurable artificial microswimmers with internal feedback. Nat Commun 2021; 12:4762. [PMID: 34362934 PMCID: PMC8346629 DOI: 10.1038/s41467-021-25108-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 07/17/2021] [Indexed: 11/09/2022] Open
Abstract
Self-propelling microparticles are often proposed as synthetic models for biological microswimmers, yet they lack the internally regulated adaptation of their biological counterparts. Conversely, adaptation can be encoded in larger-scale soft-robotic devices but remains elusive to transfer to the colloidal scale. Here, we create responsive microswimmers, powered by electro-hydrodynamic flows, which can adapt their motility via internal reconfiguration. Using sequential capillary assembly, we fabricate deterministic colloidal clusters comprising soft thermo-responsive microgels and light-absorbing particles. Light absorption induces preferential local heating and triggers the volume phase transition of the microgels, leading to an adaptation of the clusters' motility, which is orthogonal to their propulsion scheme. We rationalize this response via the coupling between self-propulsion and variations of particle shape and dielectric properties upon heating. Harnessing such coupling allows for strategies to achieve local dynamical control with simple illumination patterns, revealing exciting opportunities for developing tactic active materials.
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Affiliation(s)
- L Alvarez
- Laboratory for Soft Materials and Interfaces, Department of Materials, ETH Zurich, Zurich, Switzerland.
| | - M A Fernandez-Rodriguez
- Laboratory for Soft Materials and Interfaces, Department of Materials, ETH Zurich, Zurich, Switzerland
- Biocolloid and Fluid Physics Group, Applied Physics Department, Faculty of Sciences, University of Granada, Granada, Spain
| | - A Alegria
- Centro de Física de Materiales (CSIC-UPV/EHU), Materials Physics Center, San Sebastián, Spain
| | - S Arrese-Igor
- Centro de Física de Materiales (CSIC-UPV/EHU), Materials Physics Center, San Sebastián, Spain
| | - K Zhao
- Laboratory for Soft Materials and Interfaces, Department of Materials, ETH Zurich, Zurich, Switzerland
| | - M Kröger
- Polymer Physics, Department of Materials, ETH Zurich, Zurich, Switzerland
| | - Lucio Isa
- Laboratory for Soft Materials and Interfaces, Department of Materials, ETH Zurich, Zurich, Switzerland.
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Hansen JN, Gong A, Wachten D, Pascal R, Turpin A, Jikeli JF, Kaupp UB, Alvarez L. Multifocal imaging for precise, label-free tracking of fast biological processes in 3D. Nat Commun 2021; 12:4574. [PMID: 34321468 PMCID: PMC8319204 DOI: 10.1038/s41467-021-24768-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 07/06/2021] [Indexed: 11/22/2022] Open
Abstract
Many biological processes happen on a nano- to millimeter scale and within milliseconds. Established methods such as confocal microscopy are suitable for precise 3D recordings but lack the temporal or spatial resolution to resolve fast 3D processes and require labeled samples. Multifocal imaging (MFI) allows high-speed 3D imaging but is limited by the compromise between high spatial resolution and large field-of-view (FOV), and the requirement for bright fluorescent labels. Here, we provide an open-source 3D reconstruction algorithm for multi-focal images that allows using MFI for fast, precise, label-free tracking spherical and filamentous structures in a large FOV and across a high depth. We characterize fluid flow and flagellar beating of human and sea urchin sperm with a z-precision of 0.15 µm, in a volume of 240 × 260 × 21 µm, and at high speed (500 Hz). The sampling volume allowed to follow sperm trajectories while simultaneously recording their flagellar beat. Our MFI concept is cost-effective, can be easily implemented, and does not rely on object labeling, which renders it broadly applicable.
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Affiliation(s)
- Jan N Hansen
- Institute of Innate Immunity, Biophysical Imaging, Medical Faculty, University of Bonn, Bonn, Germany.
| | - An Gong
- Center of Advanced European Studies and Research (caesar), Molecular Sensory Systems, Bonn, Germany
| | - Dagmar Wachten
- Institute of Innate Immunity, Biophysical Imaging, Medical Faculty, University of Bonn, Bonn, Germany
| | - René Pascal
- Center of Advanced European Studies and Research (caesar), Molecular Sensory Systems, Bonn, Germany
| | - Alex Turpin
- School of Computing Science, University of Glasgow, Glasgow, UK
| | - Jan F Jikeli
- Institute of Innate Immunity, Biophysical Imaging, Medical Faculty, University of Bonn, Bonn, Germany
| | - U Benjamin Kaupp
- Center of Advanced European Studies and Research (caesar), Molecular Sensory Systems, Bonn, Germany
- Life & Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
| | - Luis Alvarez
- Center of Advanced European Studies and Research (caesar), Molecular Sensory Systems, Bonn, Germany.
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24
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Gong A, Rode S, Gompper G, Kaupp UB, Elgeti J, Friedrich BM, Alvarez L. Reconstruction of the three-dimensional beat pattern underlying swimming behaviors of sperm. Eur Phys J E Soft Matter 2021; 44:87. [PMID: 34196906 PMCID: PMC8249298 DOI: 10.1140/epje/s10189-021-00076-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 05/06/2021] [Indexed: 05/09/2023]
Abstract
The eukaryotic flagellum propels sperm cells and simultaneously detects physical and chemical cues that modulate the waveform of the flagellar beat. Most previous studies have characterized the flagellar beat and swimming trajectories in two space dimensions (2D) at a water/glass interface. Here, using refined holographic imaging methods, we report high-quality recordings of three-dimensional (3D) flagellar bending waves. As predicted by theory, we observed that an asymmetric and planar flagellar beat results in a circular swimming path, whereas a symmetric and non-planar flagellar beat results in a twisted-ribbon swimming path. During swimming in 3D, human sperm flagella exhibit torsion waves characterized by maxima at the low curvature regions of the flagellar wave. We suggest that these torsion waves are common in nature and that they are an intrinsic property of beating axonemes. We discuss how 3D beat patterns result in twisted-ribbon swimming paths. This study provides new insight into the axoneme dynamics, the 3D flagellar beat, and the resulting swimming behavior.
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Affiliation(s)
- A Gong
- Center of Advanced European Studies and Research (caesar), Molecular Sensory Systems, Ludwig-Erhard-Allee 2, 53175, Bonn, Germany
| | - S Rode
- Theoretical Physics of Living Matter, Institute of Biological Information Processing and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - G Gompper
- Theoretical Physics of Living Matter, Institute of Biological Information Processing and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - U B Kaupp
- Center of Advanced European Studies and Research (caesar), Molecular Sensory Systems, Ludwig-Erhard-Allee 2, 53175, Bonn, Germany.
| | - J Elgeti
- Theoretical Physics of Living Matter, Institute of Biological Information Processing and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - B M Friedrich
- Biological Algorithms Group, TU Dresden, Cluster of Excellence 'Physics of Life' and Center for Advancing Electronics Dresden (cfaed), Helmholtzstr. 18, 01069, Dresden, Germany
| | - L Alvarez
- Center of Advanced European Studies and Research (caesar), Molecular Sensory Systems, Ludwig-Erhard-Allee 2, 53175, Bonn, Germany.
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Valente C, Andrade R, Alvarez L, Rebelo-Marques A, Stamatakis E, Espregueira-Mendes J. Effect of physical activity and exercise on telomere length: Systematic review with meta-analysis. J Am Geriatr Soc 2021; 69:3285-3300. [PMID: 34161613 DOI: 10.1111/jgs.17334] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/24/2021] [Accepted: 05/29/2021] [Indexed: 12/30/2022]
Abstract
PURPOSE To compare a physically active lifestyle or structured exercise program to physically inactive lifestyle or control groups on telomere length (TL). METHOD We searched PubMed, EMBASE, Cochrane Library, and Open Gray databases up to March 31, 2020. We calculated standardized mean differences (SMD) with 95% confidence intervals (CI) of TL comparing physically active to physically inactive individuals and exercise intervention to control groups. Risk of bias was judged using the Risk of Bias Assessment tool for Non-randomized Studies (RoBANS) for physical activity (PA) studies and the Cochrane risk-of-bias (RoB2) for exercise intervention studies. Certainty of evidence was judged using Grading of Recommendations Assessment, Development and Evaluation (GRADE). RESULTS We included 30 studies (24 assessing the effects of PA and 6 assessing the effects of exercise interventions) comprising 7418 individuals. Physically active individuals had longer telomeres (SMD = 0.70, 95% CI 0.12-1.28, very-low certainty), especially in middle-aged individuals (SMD = 0.90, 95% CI 0.08-1.72, very-low certainty) and when considering only athletes (SMD = 0.54, 95% CI 0.18-0.90, very-low certainty). Trim-and-fill analyses revealed that most of the pooled effects were overestimated. Exercise interventions did not yield any significant effect on TL. CONCLUSION There is very-low certainty that physically active individuals have longer telomeres with a moderate effect, but this effect is probably overestimated.
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Affiliation(s)
- Cristina Valente
- Clínica Do Dragão, Espregueira-Mendes Sports Centre - FIFA Medical Centre of Excellence, Porto, Portugal.,Dom Henrique Research Centre, Porto, Portugal
| | - Renato Andrade
- Clínica Do Dragão, Espregueira-Mendes Sports Centre - FIFA Medical Centre of Excellence, Porto, Portugal.,Dom Henrique Research Centre, Porto, Portugal.,Porto Biomechanics Laboratory (LABIOMEP), Faculty of Sports, University of Porto, Porto, Portugal
| | - Luis Alvarez
- Dpto. Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad CEU Cardenal Herrera, Valencia, Spain.,I3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,IPATIMUP, Institute of Molecular Pathology and Immunology, University of Porto, Porto, Portugal
| | - Alexandre Rebelo-Marques
- Clínica Do Dragão, Espregueira-Mendes Sports Centre - FIFA Medical Centre of Excellence, Porto, Portugal.,Dom Henrique Research Centre, Porto, Portugal.,Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Clinical Academic Center of Coimbra, Coimbra, Portugal
| | - Emmanuel Stamatakis
- Charles Perkins Centre, School of Health Sciences, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia
| | - João Espregueira-Mendes
- Clínica Do Dragão, Espregueira-Mendes Sports Centre - FIFA Medical Centre of Excellence, Porto, Portugal.,Dom Henrique Research Centre, Porto, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Guimarães, Portugal.,3B's Research Group-Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal.,School of Medicine, Minho University, Braga, Portugal
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26
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Canton L, Canton C, Ceballos L, Domínguez P, Rodríguez J, Lanusse C, Alvarez L, Moreno L. Oral and topical extra-label administration of fipronil to laying hens: Assessment of the egg residue patterns. J Vet Pharmacol Ther 2021; 44:808-819. [PMID: 33763877 DOI: 10.1111/jvp.12965] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 10/14/2020] [Accepted: 02/19/2021] [Indexed: 11/28/2022]
Abstract
This experimental work reproduces the fipronil extra-label administration performed by producers in laying hens. The scientific goal was to characterize the residual concentrations in eggs from treated hens and suggest the withdrawal periods that should be respected to avoid risk for consumers. Thirty-four laying hens were allocated into two groups: Group A was treated with fipronil in feed, two single doses of 1 mg kg-1 day-1 ; Group B was administered a single dose of 1 mg kg-1 by the topical route. Fipronil egg residues were quantified by HPLC-MS/MS. Fipronil and its sulphone metabolite (fipronil-SO2 ) were measured in egg after both treatments. The highest egg residual profile was always for fipronil-SO2 . Mean maximum egg concentrations (Cmax ) of 228.5 ± 79.8 ng/g (fipronil) and 1,849 ± 867 ng/g (fipronil-SO2 ) were found after fipronil administration in feed. The lowest residual levels were quantified after the topical treatment with Cmax of 27.1 ± 4.9 and 163 ± 26 ng/g for fipronil and fipronil-SO2 . Mean fipronil marker residues and established MRLs allowed calculating the withdrawal periods, the shortest being 74 days after topical administration. Such a long withdrawal period is difficult to meet in egg production systems. Thus, the extra-label use of fipronil in laying hens should not be recommended under any circumstances.
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Affiliation(s)
- Lucila Canton
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN, UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Tandil, Argentina
| | - Candela Canton
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN, UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Tandil, Argentina
| | - Laura Ceballos
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN, UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Tandil, Argentina
| | - Paula Domínguez
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN, UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Tandil, Argentina
| | - José Rodríguez
- Instituto Nacional de Tecnología Agropecuaria (INTA, Balcarce, Argentina
| | - Carlos Lanusse
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN, UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Tandil, Argentina
| | - Luis Alvarez
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN, UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Tandil, Argentina
| | - Laura Moreno
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN, UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Tandil, Argentina
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27
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Gadadhar S, Alvarez Viar G, Hansen JN, Gong A, Kostarev A, Ialy-Radio C, Leboucher S, Whitfield M, Ziyyat A, Touré A, Alvarez L, Pigino G, Janke C. Tubulin glycylation controls axonemal dynein activity, flagellar beat, and male fertility. Science 2021; 371:371/6525/eabd4914. [PMID: 33414192 DOI: 10.1126/science.abd4914] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 10/13/2020] [Accepted: 11/18/2020] [Indexed: 12/30/2022]
Abstract
Posttranslational modifications of the microtubule cytoskeleton have emerged as key regulators of cellular functions, and their perturbations have been linked to a growing number of human pathologies. Tubulin glycylation modifies microtubules specifically in cilia and flagella, but its functional and mechanistic roles remain unclear. In this study, we generated a mouse model entirely lacking tubulin glycylation. Male mice were subfertile owing to aberrant beat patterns of their sperm flagella, which impeded the straight swimming of sperm cells. Using cryo-electron tomography, we showed that lack of glycylation caused abnormal conformations of the dynein arms within sperm axonemes, providing the structural basis for the observed dysfunction. Our findings reveal the importance of microtubule glycylation for controlled flagellar beating, directional sperm swimming, and male fertility.
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Affiliation(s)
- Sudarshan Gadadhar
- Institut Curie, Université PSL, CNRS UMR3348, F-91400 Orsay, France. .,Université Paris-Saclay, CNRS UMR3348, F-91400 Orsay, France
| | - Gonzalo Alvarez Viar
- Max Planck Institute of Molecular Cell Biology and Genetics, D-01307 Dresden, Germany
| | - Jan Niklas Hansen
- Institute of Innate Immunity, Medical Faculty, University of Bonn, D-53127 Bonn, Germany
| | - An Gong
- Center of Advanced European Studies and Research, D-53175 Bonn, Germany
| | - Aleksandr Kostarev
- Max Planck Institute of Molecular Cell Biology and Genetics, D-01307 Dresden, Germany
| | - Côme Ialy-Radio
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 Paris, France
| | - Sophie Leboucher
- Institut Curie, Université PSL, CNRS UMR3348, F-91400 Orsay, France.,Université Paris-Saclay, CNRS UMR3348, F-91400 Orsay, France
| | - Marjorie Whitfield
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 Paris, France
| | - Ahmed Ziyyat
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 Paris, France.,Service d'histologie, d'embryologie, Biologie de la reproduction, Assistance Publique-Hôpitaux de Paris, Hôpital Cochin, F-75014 Paris, France
| | - Aminata Touré
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 Paris, France
| | - Luis Alvarez
- Center of Advanced European Studies and Research, D-53175 Bonn, Germany.
| | - Gaia Pigino
- Max Planck Institute of Molecular Cell Biology and Genetics, D-01307 Dresden, Germany. .,Human Technopole, I-20157 Milan, Italy
| | - Carsten Janke
- Institut Curie, Université PSL, CNRS UMR3348, F-91400 Orsay, France. .,Université Paris-Saclay, CNRS UMR3348, F-91400 Orsay, France
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Luque S, Lloberas M, Cardozo P, Virkel G, Farias C, Viviani P, Lanusse C, Alvarez L, Lifschitz A. Combined moxidectin-levamisole treatment against multidrug-resistant gastrointestinal nematodes: A four-year efficacy monitoring in lambs. Vet Parasitol 2021; 290:109362. [PMID: 33524780 DOI: 10.1016/j.vetpar.2021.109362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 01/05/2021] [Accepted: 01/09/2021] [Indexed: 11/29/2022]
Abstract
Nematicide combinations may be a valid strategy to achieve effective nematode control in the presence of drug resistance. The goal of the current trial was to evaluate the pharmaco-parasitological performance of the moxidectin (MOX) and levamisole (LEV) combination after four years of continuous use in lambs naturally parasitized with multi-resistant gastrointestinal nematodes. At the beginning of the trial, 40 lambs were divided into four groups (n = 10), which were untreated (control) or subcutaneously treated with MOX (0.2 mg/kg), LEV (8 mg/kg) or with the combination MOX + LEV (administered separately at 0.2 and 8 mg/kg, respectively). Blood samples were collected at different times post-treatment and LEV and MOX plasma concentrations were measured by HPLC. The clinical efficacy of the continuous use of MOX + LEV combination was assessed with the controlled efficacy test (CET), performed at the beginning and end of the study, and with the faecal egg count reduction (FECR) test, performed over the four-year study period. No significant adverse pharmacokinetic changes were observed either for MOX or LEV after their co-administration to infected lambs. The CET (first year) showed efficacies of 84.3 % (Haemonchus contortus), 100 % (Teladorsagia circumcincta and Trichostrongylus axei), and 97.4 % (T. colubriformis). After the repetitive use of the combined treatment for four years, those efficacies remained high (100 %) and only decreased to 58 % against T. colubriformis. The evaluation of the FECR over the study period showed fluctuations in the performance of the combined administration. The initial FECR (2014) was 99 % (MOX), 85 % (LEV) and 100 % (MOX + LEV). The co-administration of MOX + LEV during the four-year experimental period resulted in a significantly higher anthelmintic effect (87 %) than that of MOX (42 %) or LEV (69 %) given alone. The combined use of MOX + LEV to control resistant gastrointestinal nematodes appears to be a valid strategy under specific management conditions. A high initial therapeutic response to the combination would be a relevant feature for the success of this tool.
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Affiliation(s)
- S Luque
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, UNCPBA, Tandil, Argentina
| | - M Lloberas
- Laboratorio de Parasitología, Instituto Nacional de Tecnología Agropecuaria (INTA), Estación Experimental Balcarce, Argentina
| | - P Cardozo
- Laboratorio de Parasitología, Instituto Nacional de Tecnología Agropecuaria (INTA), Estación Experimental Balcarce, Argentina
| | - G Virkel
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, UNCPBA, Tandil, Argentina
| | - C Farias
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, UNCPBA, Tandil, Argentina
| | - P Viviani
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, UNCPBA, Tandil, Argentina
| | - C Lanusse
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, UNCPBA, Tandil, Argentina
| | - L Alvarez
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, UNCPBA, Tandil, Argentina
| | - A Lifschitz
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, UNCPBA, Tandil, Argentina.
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29
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Frias-Toral E, Alvarez L, Artacho R, Arteaga C, Salcedo D, Fonseca D, Ruiz-Lopez M. Prevalence of Sarcopenia in community-dwelling older adults of Guayaquil. Clin Nutr ESPEN 2020. [DOI: 10.1016/j.clnesp.2020.09.201] [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: 10/23/2022]
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30
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Frias-Toral E, Alvarez L, Salcedo D, Mateus M, Galvez J, Fonseca D. Nutritional status and frailty in community-dwelling older adults of Guayaquil, Ecuador. Clin Nutr ESPEN 2020. [DOI: 10.1016/j.clnesp.2020.09.621] [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: 10/23/2022]
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31
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Joly‐Amado A, Novoa M, Alvarez L, Chan D, Paek H, Willman J, Willman M, Nash K. Effects of levetiracetam treatment on cognitive and noncognitive impairments in a mouse model of tauopathy. Alzheimers Dement 2020. [DOI: 10.1002/alz.046022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Kevin Nash
- University of South Florida Tampa FL USA
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32
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Briongos Figuero S, Estevez A, Perez M, Martinez-Ferrer J, Alvarez L, Anguera I, Garcia E, Perez-Lorente F, Porres M, Villacastin J, Munoz-Aguilera R. Impact of an adaptive CRT optimization algorithm on the risk of life-threatening ventricular arrythmias of heart failure patients. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Adaptive cardiac resynchronization therapy (aCRT) algorithm provides ambulatory CRT optimization and synchronized left-ventricular pacing instead of conventional biventricular pacing.
Purpose
To analyze the impact of aCRT on the risk of life-threatening ventricular arrythmia (VA) in patients with concomitant defibrillator therapy.
Methods
Symptomatic HF patients, in sinus rhythm, with LVEF ≤35% and QRS complex ≥130 ms undergoing first CRT-defibrillator (CRT-D) implant were collected from the multicentre, prospective and nationwide UMBRELLA study (2012–2017). All device information was automatically stored and collected through the remote monitoring system. An experts committee analysed in a blinded manner all electrograms. The endpoint was first appropriate therapy (AT) delivered within ventricular fibrillation zone at 12-months follow-up.
Results
206 patients were collected (66.1±8.7 years; 73.3% male). Fifty nine patients composed the aCRT group and 147 composed the non-aCRT group. At implant, LBBB was present in 93% of patients, functional class III or IV in 69.9%, non-ischemic HF in 63.1% of patients and mean LVEF was 26.5±5.6%. Optimal medical treatment was achieved in a majority (B-blockers in 92%; RAASi in 89% and MRA in 72.2%).
The percentage of ventricular pacing through 12 months was 96.1±9.4% in non-aCRT patients and 97.5±2.7% in aCRT patients (p=0.261). At 1-year of follow-up, 16 patients were delivered an AT (event rate: 7.8%). Most of these episodes (n=14) were due to sustained monomorphic ventricular tachycardia while the rest were caused by sustained polymorphic ventricular tachycardia/VF. A lower incidence of AT was observed in aCRT patients (3.4%) compared to non-aCRT patients (9.5%) but with no statistical differences (OR=0.33, CI 0.07–1.51, p=0.155).
Conclusions
In patients undergoing CRT provided by aCRT algorithm the risk of malign VA after 1-year of follow-up was low. Randomized studies are needed to clarify the impact of this dynamic algorithm on the arrhythmic risk of HF patients.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
| | - A Estevez
- Public Hospital of Vallecas - Hospital Infanta Leonor, Madrid, Spain
| | - M.L Perez
- University Hospital Complex A Coruña, A Coruña, Spain
| | | | - L Alvarez
- University Hospital Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain
| | - I Anguera
- University Hospital of Bellvitge, Hospitalet De Llobregat, Spain
| | - E Garcia
- University Hospital Alvaro Cunqueiro, Vigo, Spain
| | | | - M Porres
- Donostia University Hospital, San Sebastian, Spain
| | | | - R Munoz-Aguilera
- Public Hospital of Vallecas - Hospital Infanta Leonor, Madrid, Spain
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Plumb TJ, Alvarez L, Ross DL, Lee JJ, Mulhern JG, Bell JL, Abra GE, Prichard SS, Chertow GM, Aragon MA. Self-care training using the Tablo hemodialysis system. Hemodial Int 2020; 25:12-19. [PMID: 33047477 PMCID: PMC7891342 DOI: 10.1111/hdi.12890] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 08/19/2020] [Accepted: 09/18/2020] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Recently published results of the investigational device exemption (IDE) trial using the Tablo hemodialysis system confirmed its safety and efficacy for home dialysis. This manuscript reports additional data from the Tablo IDE study on the training time required to be competent in self-care, the degree of dependence on health care workers and caregivers after training was complete, and participants' assessment of the ease-of-use of Tablo. METHODS We collected data on the time required to set up concentrates and the Tablo cartridge prior to treatment initiation. We asked participants to rate system setup, treatment, and takedown on a Likert scale from 1 (very difficult) to 5 (very simple) and if they had required any assistance with any aspect of treatment over the prior 7 days. In a subgroup of 15 participants, we recorded the number of training sessions required to be deemed competent to do self-care dialysis. FINDINGS Eighteen men and 10 women with a mean age of 52.6 years completed the study. Thirteen had previous self-care experience using a different dialysis system. Mean set up times for the concentrates and cartridge were 1.1 and 10.0 minutes, respectively. Participants with or without previous self-care experience had similar set-up times. The mean ease-of-use score was 4.5 or higher on a scale from 1 to 5 during the in-home phase. Sixty-five percent required no assistance at home and on average required fewer than four training sessions to be competent in managing their treatments. Results were similar for participants with or without previous self-care experience. CONCLUSIONS Participants in the Tablo IDE trial were able to quickly learn and manage hemodialysis treatments in the home, found Tablo easy to use, and were generally independent in performing hemodialysis.
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Affiliation(s)
- Troy J Plumb
- University of Nebraska, Nebraska Medical Center, Omaha, Nebraska, 68198, USA
| | - Luis Alvarez
- Palo Alto Medical Foundation, 795 El Camino Real, Palo Alto, California, 94301, USA
| | - Dennis L Ross
- Kansas Nephrology Research Institute, 1007 N. Emporia, Wichita, Kansas, 67214, USA
| | - Joseph J Lee
- Nephrology Associates Medical Group, 3660 Park Sierra #208, Riverside, California, 92505, USA
| | - Jeffrey G Mulhern
- Fresenius Kidney Care Pioneer Valley Dialysis, 208 Ashley Ave, West Springfield, Massachusetts, 01089, USA
| | - Jeffrey L Bell
- Southwest Georgia Nephrology Clinic, 1200 North Jefferson Street, Albany, Georgia, 31701, USA
| | - Graham E Abra
- Stanford University, 300 Pasteur Drive, 1st floor, Suite A175, Stanford, California, 94305, USA
| | | | - Glenn M Chertow
- Stanford University School of Medicine, 1070 Arastradero Road, Palo Alto, California, 94034, USA
| | - Michael A Aragon
- DaVita Grapevine at Home, 1600 W. Northwest Hwy, Suite 100, Grapevine, Texas, 76051, USA
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Chertow GM, Alvarez L, Plumb TJ, Prichard SS, Aragon M. Patient-reported outcomes from the investigational device exemption study of the Tablo hemodialysis system. Hemodial Int 2020; 24:480-486. [PMID: 32851807 PMCID: PMC7692883 DOI: 10.1111/hdi.12869] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 07/20/2020] [Accepted: 07/22/2020] [Indexed: 01/30/2023]
Abstract
INTRODUCTION We recently completed an Investigational Device Exemption (IDE) study in which 30 patients were enrolled (13 patients previously on home hemodialysis (HHD) and 17 patients new to HHD) and treated with the Tablo Hemodialysis System (Outset Medical, Inc., San Jose, CA) for 8 weeks in-center and 8 weeks in-home with an interim 2-4 week transition period for home training. METHODS In addition to assessments of urea kinetics, events related to safety, and operational issues (e.g., alarm resolution), we obtained data on several parameters of health-related quality of life, including time to recovery (TTR), the EQ-5D-5L (a well-validated measure of general health status), and the quality of sleep and related symptoms, to further assess the safety of HHD with Tablo. We compared results obtained during the in-center and in-home phases of the trial. RESULTS Twenty-eight of 30 patients (93%) completed all trial periods. Adherence to the prescribed four treatments per week schedule was 96% in-center and 99% in-home. Median TTR was 1.5 hours (10th, 90th percentile range 0.17 to 12, mean TTR 3.68 ± 5.88 hours) during the in-center and 2 hours (10th, 90th percentile range 0 to 6.0, mean TTR 3.04 ± 5.14 hours) during the at-home phase (Wilcoxon signed rank p = 0.57). Median index values on the EQ-5D-5L were similar during the in-center (0.832, 10th, 90th percentile range 0.617 to 1, mean 0.817 ± 0.165) and in-home (0.826, 10th, 90th percentile range 0.603 to 1, mean 0.821 ± 0.163) trial phases (Wilcoxon signed rank p = 0.36). Patients reported feeling alert or well-rested with little difficulty falling or staying asleep or feeling tired and worn out when using Tablo in either environment. CONCLUSION When using Tablo in-home, patients reported similar TTR, general health status, and sleep quality and related symptoms compared to using Tablo in-center. (294 words).
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Affiliation(s)
- Glenn M Chertow
- Stanford University School of Medicine, Stanford, California, USA
| | - Luis Alvarez
- Palo Alto Medical Foundation, Palo Alto, California, USA
| | - Troy J Plumb
- University of Nebraska Medical Center, Omaha, Nebraska, USA
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Alvarez L, Imbaquingo G, Rivadeneira MF, Reascos L. Validation of the translation and cross-cultural adaptation into Spanish of the Postoperative Nausea and Vomiting Intensity Scale. ACTA ACUST UNITED AC 2020; 67:538-544. [PMID: 32819752 DOI: 10.1016/j.redar.2020.05.016] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 02/28/2020] [Accepted: 05/18/2020] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Postoperative nausea and vomiting (PONV) is a common problem in patients undergoing surgical procedures, generating patient dissatisfaction and increasing hospital costs. The Postoperative Nausea and Vomiting Intensity Scale identifies clinically significant cases; however, it has not been validated in Spanish. OBJECTIVE To carry out a cross-cultural adaptation of the PONV Intensity Scale into Spanish and validate it for use in the postoperative period of patients undergoing elective non-cardiac and non-intracranial surgery. MATERIALS AND METHODS Cross-sectional validation study of a diagnostic test. The NVPO Intensity Scale was culturally adapted to Spanish and administered to 393 adult hospitalized patients at 6 postoperative hours. The data were compared with the Apfel Scale and nausea measured on a visual analogue scale (VAS). Internal consistency and inter-observer concordance were calculated. RESULTS 59.8% of patients presented NVPO, of which 14.5% were clinically significant. An acceptable internal consistency was obtained for the NVPO Intensity Scale (Cronbach's alpha 0.7) and a high inter-observer correlation (Kappa 0.9, 95% CI 0.86-0.92), statistically significant, for the overall scale. The correlation with VAS was high (Rho Spearman 0.9). The mean VAS and Apfel scale score was significantly higher in patients with clinically significant PONV. CONCLUSIONS The PONV Intensity Scale adapted to Spanish is a valid and reliable instrument for monitoring and evaluating postoperative nausea and vomiting.
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Affiliation(s)
- L Alvarez
- Anestesiología, Reanimación y Terapia del Dolor, Pontificia Universidad Católica del Ecuador, Quito, Ecuador
| | - G Imbaquingo
- Anestesiología, Reanimación y Terapia del Dolor, Pontificia Universidad Católica del Ecuador, Quito, Ecuador
| | - M F Rivadeneira
- Epidemiología, Facultad de Medicina, Instituto de Salud Pública, Pontificia Universidad Católica del Ecuador, Quito, Ecuador.
| | - L Reascos
- Servicio de Anestesiología, Hospital de Especialidades FF. AA. N° 1, Quito, Ecuador
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Rozbesky D, Verhagen MG, Karia D, Nagy GN, Alvarez L, Robinson RA, Harlos K, Padilla‐Parra S, Pasterkamp RJ, Jones EY. Structural basis of semaphorin-plexin cis interaction. EMBO J 2020; 39:e102926. [PMID: 32500924 PMCID: PMC7327498 DOI: 10.15252/embj.2019102926] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 04/22/2020] [Accepted: 04/23/2020] [Indexed: 01/05/2023] Open
Abstract
Semaphorin ligands interact with plexin receptors to contribute to functions in the development of myriad tissues including neurite guidance and synaptic organisation within the nervous system. Cell-attached semaphorins interact in trans with plexins on opposing cells, but also in cis on the same cell. The interplay between trans and cis interactions is crucial for the regulated development of complex neural circuitry, but the underlying molecular mechanisms are uncharacterised. We have discovered a distinct mode of interaction through which the Drosophila semaphorin Sema1b and mouse Sema6A mediate binding in cis to their cognate plexin receptors. Our high-resolution structural, biophysical and in vitro analyses demonstrate that monomeric semaphorins can mediate a distinctive plexin binding mode. These findings suggest the interplay between monomeric vs dimeric states has a hereto unappreciated role in semaphorin biology, providing a mechanism by which Sema6s may balance cis and trans functionalities.
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Affiliation(s)
- Daniel Rozbesky
- Division of Structural BiologyWellcome Centre for Human GeneticsUniversity of OxfordOxfordUK
| | - Marieke G Verhagen
- Department of Translational NeuroscienceUMC Utrecht Brain CenterUniversity Medical Center UtrechtUtrecht UniversityUtrechtThe Netherlands
| | - Dimple Karia
- Division of Structural BiologyWellcome Centre for Human GeneticsUniversity of OxfordOxfordUK
| | - Gergely N Nagy
- Division of Structural BiologyWellcome Centre for Human GeneticsUniversity of OxfordOxfordUK
| | - Luis Alvarez
- Cellular ImagingWellcome Centre for Human GeneticsUniversity of OxfordOxfordUK
| | - Ross A Robinson
- Division of Structural BiologyWellcome Centre for Human GeneticsUniversity of OxfordOxfordUK
- Present address:
Immunocore LtdAbingdonUK
| | - Karl Harlos
- Division of Structural BiologyWellcome Centre for Human GeneticsUniversity of OxfordOxfordUK
| | - Sergi Padilla‐Parra
- Division of Structural BiologyWellcome Centre for Human GeneticsUniversity of OxfordOxfordUK
- Cellular ImagingWellcome Centre for Human GeneticsUniversity of OxfordOxfordUK
- Present address:
Department of Infectious DiseasesFaculty of Life Sciences & MedicineKing's College LondonLondonUK
- Present address:
Randall Centre for Cell and Molecular BiophysicsKing's College LondonLondonUK
| | - R Jeroen Pasterkamp
- Department of Translational NeuroscienceUMC Utrecht Brain CenterUniversity Medical Center UtrechtUtrecht UniversityUtrechtThe Netherlands
| | - Edith Yvonne Jones
- Division of Structural BiologyWellcome Centre for Human GeneticsUniversity of OxfordOxfordUK
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Gompper G, Winkler RG, Speck T, Solon A, Nardini C, Peruani F, Löwen H, Golestanian R, Kaupp UB, Alvarez L, Kiørboe T, Lauga E, Poon WCK, DeSimone A, Muiños-Landin S, Fischer A, Söker NA, Cichos F, Kapral R, Gaspard P, Ripoll M, Sagues F, Doostmohammadi A, Yeomans JM, Aranson IS, Bechinger C, Stark H, Hemelrijk CK, Nedelec FJ, Sarkar T, Aryaksama T, Lacroix M, Duclos G, Yashunsky V, Silberzan P, Arroyo M, Kale S. The 2020 motile active matter roadmap. J Phys Condens Matter 2020; 32:193001. [PMID: 32058979 DOI: 10.1088/1361-648x/ab6348] [Citation(s) in RCA: 137] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Activity and autonomous motion are fundamental in living and engineering systems. This has stimulated the new field of 'active matter' in recent years, which focuses on the physical aspects of propulsion mechanisms, and on motility-induced emergent collective behavior of a larger number of identical agents. The scale of agents ranges from nanomotors and microswimmers, to cells, fish, birds, and people. Inspired by biological microswimmers, various designs of autonomous synthetic nano- and micromachines have been proposed. Such machines provide the basis for multifunctional, highly responsive, intelligent (artificial) active materials, which exhibit emergent behavior and the ability to perform tasks in response to external stimuli. A major challenge for understanding and designing active matter is their inherent nonequilibrium nature due to persistent energy consumption, which invalidates equilibrium concepts such as free energy, detailed balance, and time-reversal symmetry. Unraveling, predicting, and controlling the behavior of active matter is a truly interdisciplinary endeavor at the interface of biology, chemistry, ecology, engineering, mathematics, and physics. The vast complexity of phenomena and mechanisms involved in the self-organization and dynamics of motile active matter comprises a major challenge. Hence, to advance, and eventually reach a comprehensive understanding, this important research area requires a concerted, synergetic approach of the various disciplines. The 2020 motile active matter roadmap of Journal of Physics: Condensed Matter addresses the current state of the art of the field and provides guidance for both students as well as established scientists in their efforts to advance this fascinating area.
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Affiliation(s)
- Gerhard Gompper
- Theoretical Soft Matter and Biophysics, Institute of Complex Systems and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany
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Agra RM, Gago-Dominguez M, Paradela-Dobarro B, Torres-Español M, Alvarez L, Fernandez-Trasancos A, Varela-Roman A, Calaza M, Eiras S, Alvarez E, Carracedo A, Gonzalez-Juanatey JR. Obesity-Related Genetic Determinants of Heart Failure Prognosis. Cardiovasc Drugs Ther 2020; 33:415-424. [PMID: 31209632 DOI: 10.1007/s10557-019-06888-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
PURPOSE Recent advances in genomics offer a smart option for predicting future risk of disease and prognosis. The objective of this study was to examine the prognostic value in heart failure (HF) patients, of a series of single nucleotide polymorphisms (SNPs). METHODS A selection of 192 SNPs found to be related with obesity, body mass index, circulating lipids or cardiovascular diseases were genotyped in 191 patients with HF. Anthropometrical and clinical variables were collected for each patient, and death and readmission by HF were registered as the primary endpoint. RESULTS A total of 53 events were registered during a follow-up period of 438 (263-1077) days (median (IQR)). Eight SNPs strongly related to obesity and HF prognosis were selected as possible prognostic variables. From these, rs10189761 and rs737337 variants were independently associated with HF prognosis (HR 2.295 (1.287-4.089, 95% CI); p = 0.005), whereas rs10423928, rs1800437, rs737337 and rs9351814 were related with bad prognosis only in obese patients (HR 2.142 (1.438-3.192, 95% CI); p = 0.00018). Combined scores of the genomic variants were highly predictive of poor prognosis. CONCLUSIONS SNPs rs10189761 and rs737337 were identified, for the first time, as independent predictors of major clinical outcomes in patients with HF. The data suggests an additive predictive value of these SNPs for a HF prognosis. In particular for obese patients, SNPs rs10423928, rs1800437, rs737337 and rs9351814 were related with a bad prognosis. Combined scores weighting the risk of each genomic variant could effect interesting new tools to stratify the prognostic risk of HF patients.
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Affiliation(s)
- R M Agra
- Laboratorio no. 6. Edif. Consultas externas (planta -2), Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Servicio de Cardiología y Unidad de Hemodinámica, Complexo Hospitalario Universitario de Santiago de Compostela (CHUS), SERGAS, Travesía da Choupana s/n, Santiago de Compostela, 15706, A Coruña, Spain
- CIBERCV, Madrid, Spain
| | - M Gago-Dominguez
- Fundación Pública Galega de Medicina Xenómica, SERGAS, Santiago de Compostela, Spain
| | - B Paradela-Dobarro
- Laboratorio no. 6. Edif. Consultas externas (planta -2), Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Servicio de Cardiología y Unidad de Hemodinámica, Complexo Hospitalario Universitario de Santiago de Compostela (CHUS), SERGAS, Travesía da Choupana s/n, Santiago de Compostela, 15706, A Coruña, Spain
- CIBERCV, Madrid, Spain
| | - M Torres-Español
- Grupo de Medicina Xenómica, CeGen-PRB2, Instituto de Investigación Sanitaria de Santiago, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - L Alvarez
- Laboratorio no. 6. Edif. Consultas externas (planta -2), Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Servicio de Cardiología y Unidad de Hemodinámica, Complexo Hospitalario Universitario de Santiago de Compostela (CHUS), SERGAS, Travesía da Choupana s/n, Santiago de Compostela, 15706, A Coruña, Spain
- CIBERCV, Madrid, Spain
| | - A Fernandez-Trasancos
- Laboratorio no. 6. Edif. Consultas externas (planta -2), Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Servicio de Cardiología y Unidad de Hemodinámica, Complexo Hospitalario Universitario de Santiago de Compostela (CHUS), SERGAS, Travesía da Choupana s/n, Santiago de Compostela, 15706, A Coruña, Spain
- CIBERCV, Madrid, Spain
| | - A Varela-Roman
- Laboratorio no. 6. Edif. Consultas externas (planta -2), Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Servicio de Cardiología y Unidad de Hemodinámica, Complexo Hospitalario Universitario de Santiago de Compostela (CHUS), SERGAS, Travesía da Choupana s/n, Santiago de Compostela, 15706, A Coruña, Spain
- CIBERCV, Madrid, Spain
| | - M Calaza
- Centro de Investigación en Medicina Molecular y Enfermedades Crónicas, CIMUS, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - S Eiras
- Laboratorio no. 6. Edif. Consultas externas (planta -2), Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Servicio de Cardiología y Unidad de Hemodinámica, Complexo Hospitalario Universitario de Santiago de Compostela (CHUS), SERGAS, Travesía da Choupana s/n, Santiago de Compostela, 15706, A Coruña, Spain
- CIBERCV, Madrid, Spain
| | - E Alvarez
- Laboratorio no. 6. Edif. Consultas externas (planta -2), Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Servicio de Cardiología y Unidad de Hemodinámica, Complexo Hospitalario Universitario de Santiago de Compostela (CHUS), SERGAS, Travesía da Choupana s/n, Santiago de Compostela, 15706, A Coruña, Spain.
- CIBERCV, Madrid, Spain.
| | - A Carracedo
- Fundación Pública Galega de Medicina Xenómica, SERGAS, Santiago de Compostela, Spain
| | - J R Gonzalez-Juanatey
- Laboratorio no. 6. Edif. Consultas externas (planta -2), Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Servicio de Cardiología y Unidad de Hemodinámica, Complexo Hospitalario Universitario de Santiago de Compostela (CHUS), SERGAS, Travesía da Choupana s/n, Santiago de Compostela, 15706, A Coruña, Spain
- CIBERCV, Madrid, Spain
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Abstract
Sperm are highly specialized cells, which have been subject to substantial evolutionary pressure. Whereas some sperm features are highly conserved, others have undergone major modifications. Some of these variations are driven by adaptation to mating behaviours or fitness at the organismic level. Others represent alternative solutions to the same task. Sperm must find the egg for fertilization. During this task, sperm rely on long slender appendages termed flagella that serve as sensory antennas, propellers and steering rudders. The beat of the flagellum is periodic. The resulting travelling wave generates the necessary thrust for propulsion in the fluid. Recent studies reveal that, for steering, different species rely on different fundamental features of the beat wave. Here, we discuss some examples of unity and diversity across sperm from different species with a particular emphasis on the steering mechanisms. This article is part of the Theo Murphy meeting issue 'Unity and diversity of cilia in locomotion and transport'.
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Affiliation(s)
- A. Gong
- Center of Advanced European Studies and Research (CAESAR), Molecular Sensory Systems, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany
| | - S. Rode
- Theoretical Soft Matter and Biophysics, Institute of Complex Systems and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - U. B. Kaupp
- Center of Advanced European Studies and Research (CAESAR), Molecular Sensory Systems, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany
| | - G. Gompper
- Theoretical Soft Matter and Biophysics, Institute of Complex Systems and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - J. Elgeti
- Theoretical Soft Matter and Biophysics, Institute of Complex Systems and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - B. M. Friedrich
- Biological Algorithms Group, TU Dresden, Biological Systems Path of the Center for Advancing Electronics Dresden (CFAED), Helmholtzstrasse 18, 01069 Dresden, Germany
| | - L. Alvarez
- Center of Advanced European Studies and Research (CAESAR), Molecular Sensory Systems, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany
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Trötschel C, Hamzeh H, Alvarez L, Pascal R, Lavryk F, Bönigk W, Körschen HG, Müller A, Poetsch A, Rennhack A, Gui L, Nicastro D, Strünker T, Seifert R, Kaupp UB. Absolute proteomic quantification reveals design principles of sperm flagellar chemosensation. EMBO J 2020; 39:e102723. [PMID: 31880004 PMCID: PMC7024835 DOI: 10.15252/embj.2019102723] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 11/19/2019] [Accepted: 11/22/2019] [Indexed: 11/19/2022] Open
Abstract
Cilia serve as cellular antennae that translate sensory information into physiological responses. In the sperm flagellum, a single chemoattractant molecule can trigger a Ca2+ rise that controls motility. The mechanisms underlying such ultra-sensitivity are ill-defined. Here, we determine by mass spectrometry the copy number of nineteen chemosensory signaling proteins in sperm flagella from the sea urchin Arbacia punctulata. Proteins are up to 1,000-fold more abundant than the free cellular messengers cAMP, cGMP, H+ , and Ca2+ . Opto-chemical techniques show that high protein concentrations kinetically compartmentalize the flagellum: Within milliseconds, cGMP is relayed from the receptor guanylate cyclase to a cGMP-gated channel that serves as a perfect chemo-electrical transducer. cGMP is rapidly hydrolyzed, possibly via "substrate channeling" from the channel to the phosphodiesterase PDE5. The channel/PDE5 tandem encodes cGMP turnover rates rather than concentrations. The rate-detection mechanism allows continuous stimulus sampling over a wide dynamic range. The textbook notion of signal amplification-few enzyme molecules process many messenger molecules-does not hold for sperm flagella. Instead, high protein concentrations ascertain messenger detection. Similar mechanisms may occur in other small compartments like primary cilia or dendritic spines.
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Affiliation(s)
- Christian Trötschel
- Fakultät für Biologie und BiotechnologieRuhr‐Universität BochumBochumGermany
| | - Hussein Hamzeh
- Center of Advanced European Studies and Research (caesar), Molecular Sensory SystemsBonnGermany
- Marine Biological LaboratoryWoods HoleMAUSA
| | - Luis Alvarez
- Center of Advanced European Studies and Research (caesar), Molecular Sensory SystemsBonnGermany
| | - René Pascal
- Center of Advanced European Studies and Research (caesar), Molecular Sensory SystemsBonnGermany
| | - Fedir Lavryk
- Center of Advanced European Studies and Research (caesar), Molecular Sensory SystemsBonnGermany
| | - Wolfgang Bönigk
- Center of Advanced European Studies and Research (caesar), Molecular Sensory SystemsBonnGermany
| | - Heinz G Körschen
- Center of Advanced European Studies and Research (caesar), Molecular Sensory SystemsBonnGermany
| | - Astrid Müller
- Center of Advanced European Studies and Research (caesar), Molecular Sensory SystemsBonnGermany
| | - Ansgar Poetsch
- Fakultät für Biologie und BiotechnologieRuhr‐Universität BochumBochumGermany
- Present address:
Center for Marine and Molecular BiotechnologyQNLMQindaoChina
- Present address:
College of Marine Life SciencesOcean University of ChinaQingdaoChina
| | - Andreas Rennhack
- Center of Advanced European Studies and Research (caesar), Molecular Sensory SystemsBonnGermany
| | - Long Gui
- Departments of Cell Biology and BiophysicsUniversity of Texas Southwestern Medical CenterDallasTXUSA
| | - Daniela Nicastro
- Departments of Cell Biology and BiophysicsUniversity of Texas Southwestern Medical CenterDallasTXUSA
| | - Timo Strünker
- Center of Advanced European Studies and Research (caesar), Molecular Sensory SystemsBonnGermany
- Marine Biological LaboratoryWoods HoleMAUSA
- Center of Reproductive Medicine and AndrologyUniversity Hospital MünsterMünsterGermany
| | - Reinhard Seifert
- Center of Advanced European Studies and Research (caesar), Molecular Sensory SystemsBonnGermany
- Marine Biological LaboratoryWoods HoleMAUSA
| | - U Benjamin Kaupp
- Center of Advanced European Studies and Research (caesar), Molecular Sensory SystemsBonnGermany
- Marine Biological LaboratoryWoods HoleMAUSA
- Life& Medical Sciences Institute (LIMES)University of BonnBonnGermany
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Willett NJ, Boninger ML, Miller LJ, Alvarez L, Aoyama T, Bedoni M, Brix KA, Chisari C, Christ G, Dearth CL, Dyson-Hudson TA, Evans CH, Goldman SM, Gregory K, Gualerzi A, Hart J, Ito A, Kuroki H, Loghmani MT, Mack DL, Malanga GA, Noble-Haeusslein L, Pasquina P, Roche JA, Rose L, Stoddart MJ, Tajino J, Terzic C, Topp KS, Wagner WR, Warden SJ, Wolf SL, Xie H, Rando TA, Ambrosio F. Taking the Next Steps in Regenerative Rehabilitation: Establishment of a New Interdisciplinary Field. Arch Phys Med Rehabil 2020; 101:917-923. [PMID: 32035141 DOI: 10.1016/j.apmr.2020.01.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 12/13/2019] [Accepted: 01/05/2020] [Indexed: 12/25/2022]
Abstract
The growing field of regenerative rehabilitation has great potential to improve clinical outcomes for individuals with disabilities. However, the science to elucidate the specific biological underpinnings of regenerative rehabilitation-based approaches is still in its infancy and critical questions regarding clinical translation and implementation still exist. In a recent roundtable discussion from International Consortium for Regenerative Rehabilitation stakeholders, key challenges to progress in the field were identified. The goal of this article is to summarize those discussions and to initiate a broader discussion among clinicians and scientists across the fields of regenerative medicine and rehabilitation science to ultimately progress regenerative rehabilitation from an emerging field to an established interdisciplinary one. Strategies and case studies from consortium institutions-including interdisciplinary research centers, formalized courses, degree programs, international symposia, and collaborative grants-are presented. We propose that these strategic directions have the potential to engage and train clinical practitioners and basic scientists, transform clinical practice, and, ultimately, optimize patient outcomes.
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Affiliation(s)
- Nick J Willett
- Emory University School of Medicine, Atlanta, GA; The Atlanta Veterans Affairs Medical Center, Decatur, GA.
| | - Michael L Boninger
- Department of Physical Medicine and Rehabilitation, School of Medicine, University of Pittsburgh, Pittsburgh, PA; VA Pittsburgh Health Care System, Pittsburgh, PA; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Laura J Miller
- Department of Physical Medicine and Rehabilitation, School of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Luis Alvarez
- Uniformed Services University of the Health Sciences, Bethesda, MD
| | - Tomoki Aoyama
- Human Health Sciences, Kyoto University, Kyoto, Japan
| | | | - Kelley Ann Brix
- Department of Defense Health Agency, Research and Development Directorate, Falls Church, VA
| | | | - George Christ
- Departments of Biomedical Engineering and Orthopaedic Surgery, University of Virginia, Charlottesville, VA
| | - Christopher L Dearth
- DoD-VA Extremity Trauma and Amputation Center of Excellence, Defense Health Headquarters, Falls Church, VA; Department of Surgery, Uniformed Services University of the Health Sciences - Walter Reed National Military Medical Center, Bethesda, MD
| | | | - Christopher H Evans
- Department of Physical Medicine and Rehabilitation, Rehabilitation Medicine Research Center, Mayo Clinic, Rochester, MN
| | - Stephen M Goldman
- DoD-VA Extremity Trauma and Amputation Center of Excellence, Defense Health Headquarters, Falls Church, VA; Department of Surgery, Uniformed Services University of the Health Sciences - Walter Reed National Military Medical Center, Bethesda, MD
| | - Kenton Gregory
- Center for Regenerative Medicine, Oregon Health Sciences University, Portland, OR
| | | | - Joseph Hart
- Departments of Orthopedic Surgery and Kinesiology, University of Virginia, Charlottesville, VA
| | - Akira Ito
- Human Health Sciences, Kyoto University, Kyoto, Japan
| | | | - M Terry Loghmani
- Department of Physical Therapy, School of Health & Human Sciences, Indiana University, Indianapolis, IN
| | - David L Mack
- Rehabilitation Medicine, University of Washington, Seattle, WA
| | - Gerard A Malanga
- Kessler Foundation, West Orange, NJ; Rutgers New Jersey Medical School, Newark, NJ
| | - Linda Noble-Haeusslein
- Departments of Neurology and Psychology and the Institute of Neuroscience, University of Texas at Austin, Austin, TX
| | - Paul Pasquina
- Uniformed Services University of the Health Sciences, Bethesda, MD
| | - Joseph A Roche
- Physical Therapy Program, Department of Health Care Sciences, Wayne State University, Detroit, MI
| | - Lloyd Rose
- Warfighter Expeditionary Medicine and Treatment, U. S. Army Medical Materiel Development Activity, U. S. Army Medical Research and Development Command, Fort Detrick, MD
| | | | | | - Carmen Terzic
- Department of Physical Medicine and Rehabilitation, Rehabilitation Medicine Research Center, Mayo Clinic, Rochester, MN
| | - Kimberly S Topp
- Department of Physical Therapy and Rehabilitation Science, University of California San Francisco, San Francisco, CA
| | - William R Wagner
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Stuart J Warden
- Department of Physical Therapy, School of Health & Human Sciences, Indiana University, Indianapolis, IN; La Trobe Sport and Exercise Medicine Research Centre, La Trobe University, Bundoora, Victoria, Australia
| | - Steven L Wolf
- Emory University School of Medicine, Atlanta, GA; The Atlanta Veterans Affairs Medical Center, Decatur, GA
| | - Hua Xie
- Center for Regenerative Medicine, Oregon Health Sciences University, Portland, OR
| | - Thomas A Rando
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford University, Palo Alto, CA; Veterans Affairs Palo Alto Health Care System, Palo Alto, CA
| | - Fabrisia Ambrosio
- Department of Physical Medicine and Rehabilitation, School of Medicine, University of Pittsburgh, Pittsburgh, PA; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA
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Alvarez L, Brown D, Hu D, Chertow GM, Vassalotti JA, Prichard S. Intradialytic Symptoms and Recovery Time in Patients on Thrice-Weekly In-Center Hemodialysis: A Cross-sectional Online Survey. Kidney Med 2019; 2:125-130. [PMID: 32734233 PMCID: PMC7380355 DOI: 10.1016/j.xkme.2019.10.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Rationale & Objective Patients experience various symptoms during hemodialysis. We aimed to assess the frequency and severity of symptoms during hemodialysis and whether intradialytic symptoms are associated with recovery time postdialysis. Study Design An online questionnaire was sent to 10,000 patients in a National Kidney Foundation database. Setting & Participants Adult patients receiving in-center hemodialysis 3 times weekly for 3 or more months. Exposure Online questionnaire. Analytic Approach Tabulation of frequency and severity of events and recovery time as percent of respondents, construction of a total symptom score, followed by rank correlation analysis of symptom characteristics with total recovery time. Outcomes Patient-reported intradialytic symptoms and recovery time postdialysis. Results 359 patients met screening criteria and completed the questionnaire. Mean age was 62.5 ± 13.8 years, 207 (58%) were men, 74 (21%) were black/African American, 132 (37%) had diabetes, 252 (70%) had hypertension, and 102 (28%) had a history of myocardial infarction, heart surgery, or stent placement. 311 (87%) patients had symptoms during dialysis in the previous week, with mean severity of 2.7 (range for each symptom, 1-5). The most common symptoms were fatigue/feeling washed out (62%), cramps (44%), and symptoms of low blood pressure (42%). Median time to recovery was 3 (range, 0-24) hours, and this correlated with the incidence and severity of intradialytic symptoms (P < 0.0001). 40% of patients had time to recovery times of 4 hours or longer. 1 in 3 patients reported having stopped dialysis early for intradialytic symptoms and 6% reported skipping dialysis at least once because of intradialytic symptoms. Limitations Recall-based self-reported data with a relatively low response rate. Conclusions A majority of patients receiving in-center hemodialysis experience symptoms such as feeling washed out, fatigue, and cramping; these may be severe and are correlated with longer recovery time following hemodialysis, as well as shortened and skipped hemodialysis sessions.
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Affiliation(s)
| | | | - Dean Hu
- Outset Medical Inc, San Jose, CA
| | | | - Joseph A Vassalotti
- Icahn School of Medicine at Mount Sinai, New York, NY.,National Kidney Foundation, Inc, New York, NY
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Shaikh F, Zhao Y, Alvarez L, Iliopoulou M, Lohans C, Schofield CJ, Padilla-Parra S, Siu SWI, Fry EE, Ren J, Stuart DI. Correction to "Structure-Based in Silico Screening Identifies a Potent Ebolavirus Inhibitor from a Traditional Chinese Medicine Library". J Med Chem 2019; 62:10004. [PMID: 31657917 PMCID: PMC8154555 DOI: 10.1021/acs.jmedchem.9b01711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Plumb TJ, Alvarez L, Ross DL, Lee JJ, Mulhern JG, Bell JL, Abra G, Prichard SS, Chertow GM, Aragon MA. Safety and efficacy of the Tablo hemodialysis system for in-center and home hemodialysis. Hemodial Int 2019; 24:22-28. [PMID: 31697042 PMCID: PMC7027451 DOI: 10.1111/hdi.12795] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/17/2019] [Accepted: 09/24/2019] [Indexed: 11/29/2022]
Abstract
Introduction: Home hemodialysis remains underutilized despite observational data indicating more favorable outcomes with home compared with in‐center hemodialysis. The Tablo Hemodialysis system is designed to be easy to learn and use and to facilitate adoption of home hemodialysis. The objective of the current investigational device exemption (IDE) study was to evaluate the safety and efficacy of Tablo managed in‐center by health care professionals and in‐home by patients and/or caregivers. Methods: A prospective, multicenter, open‐label, crossover trial comparing in‐center and in‐home hemodialysis using Tablo. There were 4 treatment periods during which hemodialysis was prescribed 4 times per week: 1‐week Run‐In, 8‐week In‐Center, 4‐week Transition, and 8‐week In‐Home. The primary efficacy endpoint was weekly standard Kt/Vurea ≥ 2.1. The secondary efficacy endpoint was delivery of ultrafiltration (UF) within 10% of prescribed UF. We collected safety and usability data. Findings: Thirty participants enrolled and 28 completed all trial periods. Adherence to the protocol requirement of 4 treatments per week was 96% in‐center and 99% in‐home. The average prescribed and delivered session lengths were 3.4 hours for both the In‐Center and the In‐Home periods. The primary efficacy endpoint for the intention‐to‐treat cohort was achieved in 199/200 (99.5%) of measurements during the In‐Center period and 168/171 (98.3%) In‐Home. The average weekly standard Kt/Vurea was 2.8 in both periods. The secondary efficacy UF endpoint was achieved in the ITT cohort in 94% in both in‐center and in‐home. Two prespecified adverse events (AEs) occurred during the In‐Center period and 6 in the In‐Home period. None of the AEs were deemed by investigators as related to Tablo. The median resolution time of alarms was 8 seconds in‐center and 5 seconds in‐home. Conclusion: Primary and secondary efficacy and safety endpoints were achieved during both In‐Center and In‐Home trial periods. This study confirms that Tablo is safe and effective for home hemodialysis use.
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Affiliation(s)
- Troy J Plumb
- University of Nebraska, Nebraska Medical Center, Omaha, Nebraska, USA
| | - Luis Alvarez
- Palo Alto Medical Foundation, Palo Alto, California, USA
| | - Dennis L Ross
- Kansas Nephrology Research Institute, Wichita, Kansas, USA
| | - Joseph J Lee
- Nephrology Associates Medical Group, Riverside, California, USA
| | - Jeffrey G Mulhern
- Fresenius Kidney Care Pioneer Valley Dialysis, West Springfield, Massachusetts, USA
| | - Jeffrey L Bell
- Southwest Georgia Nephrology Clinic, Albany, Georgia, USA
| | - Graham Abra
- Satellite Healthcare, Mountain View, California, USA
| | | | - Glenn M Chertow
- Stanford University School of Medicine, Palo Alto, California, USA
| | - Michael A Aragon
- Clinical Development, Outset Medical, San Jose, California, USA.,DaVita Grapevine at Home, Grapevine, Texas, USA
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Alvarez L, Leypoldt JK, Prichard S, Chertow GM. Toward Greater Scrutiny of Dialysate Flow: Reply to the Letter to the Editor of Dr. Molano-Triviño and Colleagues. Blood Purif 2019; 49:123-124. [PMID: 31340211 DOI: 10.1159/000501842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 07/01/2019] [Indexed: 11/19/2022]
Affiliation(s)
- Luis Alvarez
- Palo Alto Medical Foundation, Palo Alto, California, USA,
| | | | | | - Glenn M Chertow
- Stanford University School of Medicine, Stanford, California, USA
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Carranza CL, Guerra M, Osorio C, Zamora V, Herrera V, Gil J, Alvarez L. Abstract 4166: Hereditary cancer syndromes in Guatemalan population. Cancer Res 2019. [DOI: 10.1158/1538-7445.am2019-4166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
BACKGROUND The majority of cancer are sporadic, only around 5 % are considered hereditary. Although it is a low percentage, the study of these cancers are of vital importance, since they require a special clinical monitoring and management. These kind of cancers are caused by the presence of an inherited gene mutation, which increase the risk of developing a tumor. The mutations associated with these tumors are germline mutations, this means that are present in all the patient's cells, including the egg cell an sperm; this is the reason why this type of cancer can transmit to the future generations. There are many syndromes that increase the risk of hereditary cancer development, the most frequent syndromes are: Familial Breast and Ovarian cancer (BRCA1 and BRCA2 gene mutations), Lynch syndrome (MSH2, MLH1, MSH6 and PMS2 mutations), Li-Fraumeni syndrome (TP53 gene mutations) and Familial adenomatous polyposis (APC gene mutations). The aim of this study is to screen the most common hereditary cancer syndromes in Guatemalan population.
METHODS We analyzed 199 blood samples of patients with different types of tumors. We extracted DNA from the samples and then analyzed the gene mutations by next generation sequencing.
RESULTS AND DISCUSSION We have included in the present study, 93 cases with Familial Breast cancer and 106 with another type of tumors. Of all cases, we have found 17 cases with hereditary cancer syndromes (8%). The most frequent is the Breast and Ovarian hereditary syndrome caused by BRCA1 and BRCA2 (12 patients). The other hereditary cancer syndromes are shown in Table 1. The detection of this germline mutations, have a large impact in the familial cases, because these patients and their families could be monitored and evaluated more frequently. This is the first report of these syndromes in our population.
CONCLUSION We reported 6 different syndromes and 17 cases, related to hereditary cancer risk and predisposition in Guatemalan population.
Frequency of hereditary cancer syndromesSYNDROMENUMBER OF PATIENTSCANCER TYPEAGESEXGENE MUTATIONBreast and ovarian hereditary syndrome7Breast cancer29-48FBRCA1Breast and ovarian hereditary syndrome5Breast cancer29-71FBRCA2Lynch syndrome1Breast cancer80FMSH6Li-Fraumeni syndrome1Breast cancer58FTP53Breast hereditary cancer1Breast cancer57FCDH1Peutz-Jeghers syndrome1Pancreatic cancer15FSTK11Familial adenomatous polyposis1Colorectal cancer13MAPC
Citation Format: Claudia L. Carranza, Mariela Guerra, Claudia Osorio, Vanessa Zamora, Vivian Herrera, Jose Gil, Luis Alvarez. Hereditary cancer syndromes in Guatemalan population [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr 4166.
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Affiliation(s)
| | | | | | | | | | - Jose Gil
- 2Roosevelt National Hospital, Guatemala, Guatemala
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Ceballos L, Canton C, Pruzzo C, Sanabria R, Moreno L, Sanchis J, Suarez G, Ortiz P, Fairweather I, Lanusse C, Alvarez L, Martinez-Valladares M. The egg hatch test: A useful tool for albendazole resistance diagnosis in Fasciola hepatica. Vet Parasitol 2019; 271:7-13. [PMID: 31303208 DOI: 10.1016/j.vetpar.2019.06.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 05/30/2019] [Accepted: 06/01/2019] [Indexed: 01/22/2023]
Abstract
In the current study, the egg hatch test (EHT) has been evaluated as an in vitro technique to detect albendazole (ABZ) resistance in Fasciola hepatica. The intra- and inter-assay variations of the EHT were measured by means of the coefficient of variation in different fluke isolates and over time; then, the results of the EHT were compared with the "gold standard" controlled efficacy test, which assesses the in vivo anthelmintic efficacy. The EHT was used later to evaluate the intra-herd variability regarding the level of ABZ resistance in calves infected by the same fluke isolate. Finally, several factors of the initial protocol were modified to improve the simplicity of the assay, including the incubation time of eggs with the drug and the use of eggs collected from faeces. The greatest uniformity between results within the assay and over time until 8 weeks after gallbladder collection (the deadline proposed for egg analysis) was obtained with an ABZ concentration of 0.5 μM. The length of exposure to ABZ was shown to be critical, as prolonged incubation (15 days) led to a change of ovicidal activity. The ABZ concentration of 0.5 μM is suggested as a possible discriminating dose to predict ABZ resistance, due to the close agreement between the results of the EHT at an ABZ concentration of 0.5 μM and those of the in vivo assays.
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Affiliation(s)
- Laura Ceballos
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Campus Universitario, Tandil, Argentina
| | - Candela Canton
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Campus Universitario, Tandil, Argentina
| | - Cesar Pruzzo
- Facultad de Ciencias Veterinarias, Universidad Nacional de la Plata (UNLP), La Plata, Argentina
| | - Rodrigo Sanabria
- Facultad de Ciencias Veterinarias, Universidad Nacional de la Plata (UNLP), La Plata, Argentina; INTECH, CONICET-UNSAM, Chascomus, Argentina
| | - Laura Moreno
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Campus Universitario, Tandil, Argentina
| | - Jaime Sanchis
- Departamento de Parasitología, Universidad de la República (Regional Norte), Salto, Uruguay
| | - Gonzalo Suarez
- Área Farmacología, Facultad de Veterinaria, Universidad de la República (UDELAR), Montevideo, Uruguay
| | - Pedro Ortiz
- Facultad de Ciencias Veterinarias, Universidad Nacional de Cajamarca (UNC), Cajamarca, Peru
| | - Ian Fairweather
- School of Biological Sciences, The Queen´s University of Belfast, Belfast, Northern Ireland, United Kingdom
| | - Carlos Lanusse
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Campus Universitario, Tandil, Argentina
| | - Luis Alvarez
- Laboratorio de Farmacología, Centro de Investigación Veterinaria de Tandil (CIVETAN), UNCPBA-CICPBA-CONICET, Facultad de Ciencias Veterinarias, Campus Universitario, Tandil, Argentina.
| | - María Martinez-Valladares
- Instituto de Ganadería de Montaña (CSIC-Universidad de León), Department of Animal Health, Grulleros, León, Spain
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Guiñon L, Soler A, Marin J, Molina A, Lopez R, Garcia J, Jimenez W, Mira A, Alvarez L. Analytical performance specifications based on the state-of-the-art for the magnitudes included in the Spanish newborn screening program. Clin Chim Acta 2019. [DOI: 10.1016/j.cca.2019.03.1110] [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]
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Canton L, Alvarez L, Canton C, Ceballos L, Farias C, Lanusse C, Moreno L. Effect of cooking on the stability of veterinary drug residues in chicken eggs. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2019; 36:1055-1067. [PMID: 31084473 DOI: 10.1080/19440049.2019.1609704] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The available information on drug residue stability in chicken egg is scarce. The objective of this study was to evaluate the stability of drug residues in egg under different traditional cooking procedures. Fresh eggs were spiked with different drug concentrations of albendazole (ABZ) and its albendazole sulphoxide (ABZSO) and albendazole sulphone (ABZSO2) metabolites; flubendazole (FLBZ) and its reduced flubendazole (R-FLBZ) and hydrolyzed flubendazole (H-FLBZ) metabolites; amoxicillin (AMX); and enrofloxacin (EFX) and its ciprofloxacin (CFX) metabolite. The egg samples were cooked in different ways, namely, boiling, microwaving, and omelette making. Drug residue concentrations in egg were quantified by HPLC with UV or fluorescence detectors. ABZ and ABZSO concentrations in egg were not affected by boiling and microwaving, while the omelette processing significantly reduced these molecules. Residues of ABZSO2 in egg were stable or increased after all cooking procedures. In contrast, FLBZ and its metabolites FLBZ-H and FLBZ-R residues in egg decreased after all treatments. The residue concentration quantified for EFX and CFX did not show significant changes after any cooking method. AMX residues were unstable, with extremely significant drug reduction after all cooking processes. Conventional methods of egg cooking cannot be considered a tool to eliminate all veterinary drug residues.
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Affiliation(s)
- Lucila Canton
- a Laboratorio de Farmacología , Centro de Investigación Veterinaria de Tandil (CIVETAN) , Tandil , Argentina.,b Facultad de Ciencias Veterinarias , UNCPBA-CICPBA-CONICET , Tandil , Argentina
| | - Luis Alvarez
- a Laboratorio de Farmacología , Centro de Investigación Veterinaria de Tandil (CIVETAN) , Tandil , Argentina.,b Facultad de Ciencias Veterinarias , UNCPBA-CICPBA-CONICET , Tandil , Argentina
| | - Candela Canton
- a Laboratorio de Farmacología , Centro de Investigación Veterinaria de Tandil (CIVETAN) , Tandil , Argentina.,b Facultad de Ciencias Veterinarias , UNCPBA-CICPBA-CONICET , Tandil , Argentina
| | - Laura Ceballos
- a Laboratorio de Farmacología , Centro de Investigación Veterinaria de Tandil (CIVETAN) , Tandil , Argentina.,b Facultad de Ciencias Veterinarias , UNCPBA-CICPBA-CONICET , Tandil , Argentina
| | - Cristina Farias
- a Laboratorio de Farmacología , Centro de Investigación Veterinaria de Tandil (CIVETAN) , Tandil , Argentina.,b Facultad de Ciencias Veterinarias , UNCPBA-CICPBA-CONICET , Tandil , Argentina
| | - Carlos Lanusse
- a Laboratorio de Farmacología , Centro de Investigación Veterinaria de Tandil (CIVETAN) , Tandil , Argentina.,b Facultad de Ciencias Veterinarias , UNCPBA-CICPBA-CONICET , Tandil , Argentina
| | - Laura Moreno
- a Laboratorio de Farmacología , Centro de Investigación Veterinaria de Tandil (CIVETAN) , Tandil , Argentina.,b Facultad de Ciencias Veterinarias , UNCPBA-CICPBA-CONICET , Tandil , Argentina
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Iliopoulou M, Nolan R, Alvarez L, Watanabe Y, Coomer CA, Jakobsdottir GM, Bowden TA, Padilla-Parra S. Author Correction: A dynamic three-step mechanism drives the HIV-1 pre-fusion reaction. Nat Struct Mol Biol 2019; 26:526. [DOI: 10.1038/s41594-019-0244-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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