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1.
G3 (Bethesda) ; 2024 Jun 13.
Article in English | MEDLINE | ID: mdl-38869232

ABSTRACT

Maintaining genetic diversity in cultured shellfish can be challenging due to high variance in individual reproductive success, founder effects, and rapid genetic drift, but is important to retain adaptive potential and avoid inbreeding depression. To support broodstock management and selective breeding in cultured Pacific oysters (Crassostrea (Magallana) gigas), we developed an amplicon panel targeting 592 genomic regions and SNP variants with an average of 50 amplicons per chromosome. Target SNPs were selected based on elevated observed heterozygosity or differentiation in Pacific oyster populations in British Columbia, Canada. The use of the panel for parentage applications was evaluated using multiple generations of oysters from a breeding program on Vancouver Island, Canada (n = 181) and families selected for Ostreid herpesvirus-1 resistance from the Molluscan Broodstock Program in Oregon, USA (n = 136). Population characterization was evaluated using wild, naturalized, farmed, or hatchery oysters sampled throughout the Northern Hemisphere (n = 190). Technical replicates showed high genotype concordance (97.5%; n = 68 replicates). Parentage analysis found suspected pedigree and sample handling errors, demonstrating the panel's value for quality control in breeding programs. Suspected null alleles were identified and found to be largely population dependent, suggesting population-specific variation impacting target amplification. Null alleles were identified using existing data without the need for pedigree information, and once they were removed, assignment rates increased to 93.0% and 86.0% of possible assignments in the two breeding program datasets. A pipeline for analyzing the amplicon sequence data from sequencer output, amplitools, is also provided.

2.
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1386329

ABSTRACT

RESUMEN El objetivo de esta revisión fue determinar cuál es la dosis óptima necesaria de ejercicio físico que debe realizar una persona mayor para generar efectos en la Calidad de Vida. Se realizó una búsqueda en bases de datos electrónicas entre 2015-2020. Como resultado, 9 de 33 artículos cumplieron con criterios de inclusión. La prescripción de ejercicio físico más utilizada en términos de FITT o FITT-VP fue: tipo, fuerza muscular a intensidad moderada a intensa, y/o ejercicio físico aeróbico a intensidad moderada; tiempo de sesión de 60 minutos; frecuencia 3 veces por semana; y tiempo de intervención mínimo 3 meses. En cuanto al volumen y progresión, la información fue limitada y justifica más estudios. Los efectos del ejercicio físico sobre la Calidad de Vida de las personas mayores se producirán cuando exista una programación basada como mínimo según FITT, se consideren los objetivos de la persona mayor, y la práctica sea regular.


ABSTRACT The objective of this review was to determine the optimal dose of physical exercise that an elderly person should perform to generate effects on Quality of Life. A search was carried out in electronic databases between 2015-2020. As a result, 9 of 33 articles met the inclusion criteria. The most used physical exercise prescription in terms of FITT or FITT-VP was: type, muscular strength at moderate to intense intensity, and / or aerobic physical exercise at moderate intensity; 60-minute session time; frequency 3 times a week; and intervention time at least 3 months. In terms of volume and progression, the information was limited and needs further studies. The effects of physical exercise on the Quality of Life of the elderly will occur when there is a schedule based at least according to FITT, the objectives of the elderly person are considered, and the practice is regular.

3.
Rev. méd. Maule ; 35(1): 8-10, oct. 2020.
Article in Spanish | LILACS | ID: biblio-1366362

ABSTRACT

The infection caused by the SARS-CoV-2 virus, recently described in Wuhan, China, has put numerous health systems around the world in check. Given its high contagiousness and the exponential growth of cases, it was declared a pandemic by the world health organization. Although the majority of those infected will present mild symptoms, a smaller percentage will present severe manifestations of the disease, such as acute respiratory distress syndrome, requiring ventilator support measures and stays in intensive care units. The main symptoms described in SARS-CoV-2 infection are fever, fatigue, dry cough and myalgia. Despite this, there is a not insignificant number of patients who present with atypical symptoms of the disease, some described are anosmia, ageusia, gastrointestinal symptoms like diarrhea, dermatological manifestations, among others. In these patients it is particularly where the diagnosis is made late, delaying isolation and prevention measures, thus increasing the risk of contagion within the population.


Subject(s)
Humans , Male , Adult , Pandemics , COVID-19 , Quarantine , Ageusia , COVID-19 Nucleic Acid Testing , Anosmia , Olfaction Disorders/complications
4.
J Bacteriol ; 187(17): 6031-8, 2005 Sep.
Article in English | MEDLINE | ID: mdl-16109944

ABSTRACT

In nitrogen-limiting conditions, approximately 10% of the vegetative cells in filaments of the cyanobacterium Anabaena (Nostoc) sp. strain PCC 7120 differentiate into nitrogen-fixing heterocysts. During the late stages of heterocyst differentiation, three DNA elements, each embedded within an open reading frame, are programmed to excise from the chromosome by site-specific recombination. The DNA elements are named after the genes that they interrupt: nifD, fdxN, and hupL. The nifD and fdxN elements each contain a gene, xisA or xisF, respectively, that encodes the site-specific recombinase required for programmed excision of the element. Here, we show that the xisC gene (alr0677), which is present at one end of the 9,435-bp hupL element, is required for excision of the hupL element. A strain in which the xisC gene was inactivated showed no detectable excision of the hupL element. hupL encodes the large subunit of uptake hydrogenase. The xisC mutant forms heterocysts and grows diazotrophically, but unlike the wild type, it evolved hydrogen gas under nitrogen-fixing conditions. Overexpression of xisC from a plasmid in a wild-type background caused a low level of hupL rearrangement even in nitrogen-replete conditions. Expression of xisC in Escherichia coli was sufficient to produce rearrangement of an artificial substrate plasmid bearing the hupL element recombination sites. Sequence analysis indicated that XisC is a divergent member of the phage integrase family of recombinases. Site-directed mutagenesis of xisC showed that the XisC recombinase has functional similarity to the phage integrase family.


Subject(s)
Anabaena/metabolism , Bacterial Proteins/genetics , Oxidoreductases/genetics , Recombinases/genetics , Anabaena/genetics , Base Sequence , Chromosomes, Bacterial/genetics , DNA, Bacterial/genetics , Gene Deletion , Genetic Complementation Test , Plasmids/genetics , Polymerase Chain Reaction , Restriction Mapping
5.
Rev. chil. pediatr ; 74(2): 171-178, mar.-abr. 2003. tab
Article in Spanish | LILACS | ID: lil-348476

ABSTRACT

Antecedentes: Existe un número importante de procedimientos en niños que requieren sedación y analgesia, la mayoría de los cuales son realizados en pabellón quirúrgico. Objetivos: Evaluar de manera prospectiva la eficacia y seguridad de la sedoanalgesia en niños sometidos a diferentes procedimientos invasivos realizados fuera de pabellón y revisar sus costos. Hipótesis: El uso de sedantes de corta duración permiten realizar procedimientos invasivos fuera de pabellón de manera segura y con ventajas costo efectividad. Pacientes y Métodos: Niños mayores de un mes, fuera de la Unidad de cuidados intensivos, sometidos a procedimientos invasivos. Como sedación se utilizó propofol, como agente único o asociado a otros sedoanalgésicos. Se registraron dosis utilizadas, efectos secundarios calidad de la sedación administrada, y se comparó costos y tiempo de hospitalización con los mismos procedimientos realizados en pabellón quirúrgico. Resultados: Se realizaron 51 procedimientos en igual número de pacientes. En 30/51 se utilizó solamente propofol; 21/51 recibieron además otros sedoanalgésicos. La dosis total promedio de propofol fue de 3,6 mg/kg, no hubo diferencias en la dosis con el grupo que recibió asociación de drogas. La mediana del tiempo de recuperación fue de 20 min con un rango entre 4-45 min. De acuerdo a una escala predefinida de 1 a 10, la calidad de la sedación fue calificada, al final de cada procedimiento, con una mediana de 10 (rango 7-10). En 13 pacientes se registraron 16 eventos no deseados, el más frecuente fue la depresión respiratoria (8 niños), todos transitorios y sin secuelas. Los costos asociados a los procedimientos fueron más de seis veces menores ($ 14 000) a los correspondientes si se hubiesen realizado en pabellón ($ 90 000). El tiempo total estimado para los procedimientos realizados en pabellón hubiese sido de 3 horas versus 40 minutos para aquellos realizados en la sala de procedimientos. Conclusión: En este estudio la sedación y analgesia administradas fuera de pabellón en procedimientos invasivos en niños, fue segura y eficaz, logrando disminuir costos y tiempos de hospitalización en relación con los mismos procedimientos realizados en pabellón quirúrgico. El uso de propofol representó una buena alternativa como sedoanalgesia en este grupo de pacientes


Subject(s)
Humans , Male , Female , Infant, Newborn , Infant , Analgesics/economics , Hypnotics and Sedatives/economics , Analgesics/administration & dosage , Hypnotics and Sedatives/administration & dosage , Length of Stay , Minimally Invasive Surgical Procedures/methods , Propofol , Prospective Studies , Treatment Outcome
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