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Izquierdo P, Sadohara R, Wiesinger J, Glahn R, Urrea C, Cichy K. Genome-wide association and genomic prediction for iron and zinc concentration and iron bioavailability in a collection of yellow dry beans. Front Genet 2024; 15:1330361. [PMID: 38380426 PMCID: PMC10876999 DOI: 10.3389/fgene.2024.1330361] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 01/03/2024] [Indexed: 02/22/2024] Open
Abstract
Dry bean is a nutrient-dense food targeted in biofortification programs to increase seed iron and zinc levels. The underlying assumption of breeding for higher mineral content is that enhanced iron and zinc levels will deliver health benefits to the consumers of these biofortified foods. This study characterized a diversity panel of 275 genotypes comprising the Yellow Bean Collection (YBC) for seed Fe and Zn concentration, Fe bioavailability (FeBio), and seed yield across 2 years in two field locations. The genetic architecture of each trait was elucidated via genome-wide association studies (GWAS) and the efficacy of genomic prediction (GP) was assessed. Moreover, 82 yellow breeding lines were evaluated for seed Fe and Zn concentrations as well as seed yield, serving as a prediction set for GP models. Large phenotypic variability was identified in all traits evaluated, and variations of up to 2.8 and 13.7-fold were observed for Fe concentration and FeBio, respectively. Prediction accuracies in the YBC ranged from a low of 0.12 for Fe concentration, to a high of 0.72 for FeBio, and an accuracy improvement of 0.03 was observed when a QTN, identified through GWAS, was used as a fixed effect for FeBio. This study provides evidence of the lack of correlation between FeBio estimated in vitro and Fe concentration and highlights the potential of GP in accurately predicting FeBio in yellow beans, offering a cost-effective alternative to the traditional assessment of using Caco2 cell methodologies.
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Affiliation(s)
- Paulo Izquierdo
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI, United States
| | - Rie Sadohara
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI, United States
| | - Jason Wiesinger
- USDA-ARS, Robert W. Holley Center for Agriculture and Health, Ithaca, NY, United States
| | - Raymond Glahn
- USDA-ARS, Robert W. Holley Center for Agriculture and Health, Ithaca, NY, United States
| | - Carlos Urrea
- Department of Agronomy and Horticulture, Panhandle Research and Extension Center, University of Nebraska-Lincoln, Scottsbluff, NE, United States
| | - Karen Cichy
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI, United States
- USDA-ARS, Sugarbeet and Bean Research Unit, East Lansing, MI, United States
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2
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Izquierdo P, Kelly JD, Beebe SE, Cichy K. Combination of meta-analysis of QTL and GWAS to uncover the genetic architecture of seed yield and seed yield components in common bean. Plant Genome 2023:e20328. [PMID: 37082832 DOI: 10.1002/tpg2.20328] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 02/08/2023] [Accepted: 03/01/2023] [Indexed: 05/03/2023]
Abstract
Increasing seed yield in common bean could help to improve food security and reduce malnutrition globally due to the high nutritional quality of this crop. However, the complex genetic architecture and prevalent genotype by environment interactions for seed yield makes increasing genetic gains challenging. The aim of this study was to identify the most consistent genomic regions related with seed yield components and phenology reported in the last 20 years in common bean. A meta-analysis of quantitative trait locus (QTL) for seed yield components and phenology (MQTL-YC) was performed for 394 QTL reported in 21 independent studies under sufficient water and drought conditions. In total, 58 MQTL-YC over different genetic backgrounds and environments were identified, reducing threefold on average the confidence interval (CI) compared with the CI for the initial QTL. Furthermore, 40 MQTL-YC identified were co-located with 210 SNP peak positions reported via genome-wide association (GWAS), guiding the identification of candidate genes. Comparative genomics among these MQTL-YC with MQTL-YC reported in soybean and pea allowed the identification of 14 orthologous MQTL-YC shared across species. The integration of MQTL-YC, GWAS, and comparative genomics used in this study is useful to uncover and refine the most consistent genomic regions related with seed yield components for their use in plant breeding.
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Affiliation(s)
- Paulo Izquierdo
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
| | - James D Kelly
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
| | - Stephen E Beebe
- Bean Program, Crops for Health and Nutrition Area, Alliance Bioversity International-CIAT, Cali, Colombia
| | - Karen Cichy
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
- USDA-ARS, Sugarbeet and Bean Research Unit, East Lansing, MI, USA
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Gallioli A, Territo A, Basile G, Diana P, Verri P, Sanguedolce F, Gaya J, Gavrilov P, Uleri A, Fontanet S, Izquierdo P, Huguet J, Algaba F, Palou J, Breda A. The implementation of systematic biopsies in the endoscopic management of upper tract urothelial cancer. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00551-1] [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: 02/12/2023]
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Basile G, Verri P, Fontanet S, Gallioli A, Izquierdo P, Uleri A, Gaya J, Sanguedolce F, Palou J, Breda A. Assessing post-operative morbidity after retrograde/anterograde ureteroscopy for upper tract urinary cancer management using the EAU quality criteria for standardized reporting. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00954-5] [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: 02/12/2023]
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Amongi W, Nkalubo ST, Ochwo-Ssemakula M, Badji A, Dramadri IO, Odongo TL, Nuwamanya E, Tukamuhabwe P, Izquierdo P, Cichy K, Kelly J, Mukankusi C. Phenotype based clustering, and diversity of common bean genotypes in seed iron concentration and cooking time. PLoS One 2023; 18:e0284976. [PMID: 37167229 PMCID: PMC10174564 DOI: 10.1371/journal.pone.0284976] [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: 01/20/2023] [Accepted: 04/12/2023] [Indexed: 05/13/2023] Open
Abstract
Common bean is the world's most important directly consumed legume food crop that is popular for calories, protein and micronutrients. It is a staple food in sub-Saharan Africa, and a significant source of iron for anemic people. However, several pests, soil and weather challenges still impede its production. Long cooking time, and high phytic acid and polyphenols that influence bioavailable iron also limit the health benefits. To inform population improvement strategies and selection decisions for resilient fast cooking and iron biofortified beans, the study determined diversity and population structure within 427 breeding lines, varieties, or landraces mostly from Alliance Uganda and Columbia. The genotypes were evaluated for days to flowering and physiological maturity, yield, seed iron (FESEED) and zinc (ZNSEED) and cooking time (COOKT). Data for all traits showed significant (P≤0.001) differences among the genotypes. Repeatability was moderate to high for most traits. Performance ranged from 52 to 87 ppm (FESEED), 23-38 ppm (ZNSEED), 36-361 minutes (COOKT), and 397-1299 kg/ha (yield). Minimal differences existed between the gene pools in the mean performance except in yield, where Mesoamerican beans were better by 117 kg/ha. The genotypes exhibited high genetic diversity and thus have a high potential for use in plant breeding. Improvement of FESEED and ZNSEED, COOKT and yield performance within some markets such as red and small white beans is possible. Hybridization across market classes especially for yellow beans is essential but this could be avoided by adding other elite lines to the population. Superior yielding and fast cooking, yellow and large white beans were specifically lacking. Adding Fe dense elite lines to the population is also recommended. The population was clustered into three groups that could be considered for specific breeding targets based on trait correlations.
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Affiliation(s)
- Winnyfred Amongi
- Department of Agricultural Production, College of Agricultural and Environmental Sciences, Makerere University, Kampala, Uganda
- Alliance of Bioversity and CIAT, National Agricultural Research Laboratories Kawanda, Kampala, Uganda
| | | | - Mildred Ochwo-Ssemakula
- Alliance of Bioversity and CIAT, National Agricultural Research Laboratories Kawanda, Kampala, Uganda
| | - Arfang Badji
- National Crops Resources Research Institute (NaCRRI-NARO), Kampala, Uganda
- Makerere University Regional Center for Crop Improvement (MaRCCI), Collage of Agriculture and Environmental Sciences, Makerere University, Kampala, Uganda
| | - Isaac Onziga Dramadri
- Department of Agricultural Production, College of Agricultural and Environmental Sciences, Makerere University, Kampala, Uganda
- Makerere University Regional Center for Crop Improvement (MaRCCI), Collage of Agriculture and Environmental Sciences, Makerere University, Kampala, Uganda
| | - Thomas Lapaka Odongo
- Department of Agricultural Production, College of Agricultural and Environmental Sciences, Makerere University, Kampala, Uganda
| | - Ephraim Nuwamanya
- Department of Agricultural Production, College of Agricultural and Environmental Sciences, Makerere University, Kampala, Uganda
| | - Phineas Tukamuhabwe
- Department of Agricultural Production, College of Agricultural and Environmental Sciences, Makerere University, Kampala, Uganda
| | - Paulo Izquierdo
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, Michigan, United States of America
| | - Karen Cichy
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, Michigan, United States of America
- USDA-ARS, Sugarbeet and Bean Research Unit, East Lansing, Michigan, United States of America
| | - James Kelly
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, Michigan, United States of America
| | - Clare Mukankusi
- Alliance of Bioversity and CIAT, National Agricultural Research Laboratories Kawanda, Kampala, Uganda
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Uleri A, Verri P, Gallioli A, Territo A, Baboudjian M, Bravo A, Izquierdo P, Gaya J, Rodriguez-Faba Ó, Breda A, Palou J. Robotic-assisted radical cystectomy with Hugo RAS: The first European case. EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)02253-4] [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: 11/06/2022] Open
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Raez L, Brice K, Tsai J, Drusbosky L, Dumais K, Lopez-Cohen A, Wietecha D, Daba H, Izquierdo P, Santos E, Powery H. EP16.02-018 Liquid Biopsies First to Make Treatment Decisions in Patients With Metastatic Non-small Cell Lung Cancer (NSCLC). J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.1049] [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: 11/27/2022]
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Sadohara R, Long Y, Izquierdo P, Urrea CA, Morris D, Cichy K. Seed coat color genetics and genotype × environment effects in yellow beans via machine-learning and genome-wide association. Plant Genome 2022; 15:e20173. [PMID: 34817119 DOI: 10.1002/tpg2.20173] [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] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Common bean (Phaseolus vulgaris L.) is consumed worldwide, with strong regional preferences for seed appearance characteristics. Colors of the seed coat, hilum ring, and corona are all important, along with susceptibility to postharvest darkening, which decreases seed value. This study aimed to characterize a collection of 295 yellow bean genotypes for seed appearance and postharvest darkening, evaluate genotype × environment (G × E) effects and map those traits via genome-wide association analysis. Yellow bean germplasm were grown for 2 yr in Michigan and Nebraska and seed were evaluated for L*a*b* color values, postharvest darkening, and hilum ring and corona colors. A model to exclude the hilum ring and corona of the seeds, black background, and light reflection was developed by using machine learning, allowing for targeted and efficient L*a*b* value extraction from the seed coat. The G × E effects were significant for the color values, and Michigan-grown seeds were darker than Nebraska-grown seeds. Single-nucleotide polymorphisms (SNPs) were associated with L* and hilum ring color on Pv10 near the J gene involved in mature seed coat color and hilum ring color. A SNP on Pv07 associated with L*, a*, postharvest darkening, and hilum ring and corona colors was near the P gene, the ground factor gene for seed coat color expression. The machine-learning-aided model used to extract color values from the seed coat, the wide variability in seed morphology traits, and the associated SNPs provide tools for future breeding and research efforts to meet consumers' expectations for bean seed appearance.
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Affiliation(s)
- Rie Sadohara
- Dep. of Plant, Soil and Microbial Sciences, Michigan State Univ., 1066 Bogue St., East Lansing, MI, 48824, USA
| | - Yunfei Long
- Dep. of Electrical and Computer Engineering, Michigan State Univ., 428 S Shaw Ln., East Lansing, MI, 48824, USA
| | - Paulo Izquierdo
- Dep. of Plant, Soil and Microbial Sciences, Michigan State Univ., 1066 Bogue St., East Lansing, MI, 48824, USA
| | - Carlos A Urrea
- Panhandle Research & Extension Center, Univ. of Nebraska, 4502 Ave. I, Scottsbluff, NE, 69361, USA
| | - Daniel Morris
- Dep. of Electrical and Computer Engineering, Michigan State Univ., 428 S Shaw Ln., East Lansing, MI, 48824, USA
| | - Karen Cichy
- Dep. of Plant, Soil and Microbial Sciences, Michigan State Univ., 1066 Bogue St., East Lansing, MI, 48824, USA
- USDA-ARS, Sugarbeet and Bean Research Unit, 1066 Bogue St., East Lansing, MI, 48824, USA
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Raez L, Botero A, Khan A, Izquierdo P, Castellon I. P01.12 Brain Necrosis in Patients With Metastatic Lung and Breast Cancer Successfully Treated With Bevacizumab. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.336] [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: 11/28/2022]
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Diaz S, Ariza-Suarez D, Izquierdo P, Lobaton JD, de la Hoz JF, Acevedo F, Duitama J, Guerrero AF, Cajiao C, Mayor V, Beebe SE, Raatz B. Genetic mapping for agronomic traits in a MAGIC population of common bean (Phaseolus vulgaris L.) under drought conditions. BMC Genomics 2020; 21:799. [PMID: 33198642 PMCID: PMC7670608 DOI: 10.1186/s12864-020-07213-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [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: 03/30/2020] [Accepted: 11/05/2020] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Common bean is an important staple crop in the tropics of Africa, Asia and the Americas. Particularly smallholder farmers rely on bean as a source for calories, protein and micronutrients. Drought is a major production constraint for common bean, a situation that will be aggravated with current climate change scenarios. In this context, new tools designed to understand the genetic basis governing the phenotypic responses to abiotic stress are required to improve transfer of desirable traits into cultivated beans. RESULTS A multiparent advanced generation intercross (MAGIC) population of common bean was generated from eight Mesoamerican breeding lines representing the phenotypic and genotypic diversity of the CIAT Mesoamerican breeding program. This population was assessed under drought conditions in two field trials for yield, 100 seed weight, iron and zinc accumulation, phenology and pod harvest index. Transgressive segregation was observed for most of these traits. Yield was positively correlated with yield components and pod harvest index (PHI), and negative correlations were found with phenology traits and micromineral contents. Founder haplotypes in the population were identified using Genotyping by Sequencing (GBS). No major population structure was observed in the population. Whole Genome Sequencing (WGS) data from the founder lines was used to impute genotyping data for GWAS. Genetic mapping was carried out with two methods, using association mapping with GWAS, and linkage mapping with haplotype-based interval screening. Thirteen high confidence QTL were identified using both methods and several QTL hotspots were found controlling multiple traits. A major QTL hotspot located on chromosome Pv01 for phenology traits and yield was identified. Further hotspots affecting several traits were observed on chromosomes Pv03 and Pv08. A major QTL for seed Fe content was contributed by MIB778, the founder line with highest micromineral accumulation. Based on imputed WGS data, candidate genes are reported for the identified major QTL, and sequence changes were identified that could cause the phenotypic variation. CONCLUSIONS This work demonstrates the importance of this common bean MAGIC population for genetic mapping of agronomic traits, to identify trait associations for molecular breeding tool design and as a new genetic resource for the bean research community.
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Affiliation(s)
- Santiago Diaz
- Bean Program, Agrobiodiversity Area, International Center for Tropical Agriculture (CIAT), Cali, Colombia
| | - Daniel Ariza-Suarez
- Bean Program, Agrobiodiversity Area, International Center for Tropical Agriculture (CIAT), Cali, Colombia
| | - Paulo Izquierdo
- Bean Program, Agrobiodiversity Area, International Center for Tropical Agriculture (CIAT), Cali, Colombia
- Present Address: Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
| | - Juan David Lobaton
- Bean Program, Agrobiodiversity Area, International Center for Tropical Agriculture (CIAT), Cali, Colombia
- Present Address: School of Environmental and Rural Sciences, University of New England, Armidale, SA, Australia
| | - Juan Fernando de la Hoz
- Bean Program, Agrobiodiversity Area, International Center for Tropical Agriculture (CIAT), Cali, Colombia
- Present Address: Bioinformatics Interdepartmental Ph.D. Program, University of California, Los Angeles, Los Angeles, CA, USA
| | - Fernando Acevedo
- Bean Program, Agrobiodiversity Area, International Center for Tropical Agriculture (CIAT), Cali, Colombia
- Departamento de Agronomía, Facultad de Ciencias Agrarias, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Jorge Duitama
- Bean Program, Agrobiodiversity Area, International Center for Tropical Agriculture (CIAT), Cali, Colombia
- Present Address: Systems and Computing Engineering Department, Universidad de los Andes, Bogotá, Colombia
| | - Alberto F Guerrero
- Bean Program, Agrobiodiversity Area, International Center for Tropical Agriculture (CIAT), Cali, Colombia
| | - Cesar Cajiao
- Bean Program, Agrobiodiversity Area, International Center for Tropical Agriculture (CIAT), Cali, Colombia
| | - Victor Mayor
- Bean Program, Agrobiodiversity Area, International Center for Tropical Agriculture (CIAT), Cali, Colombia
- Present Address: Progeny Breeding, Madrid, Colombia
| | - Stephen E Beebe
- Bean Program, Agrobiodiversity Area, International Center for Tropical Agriculture (CIAT), Cali, Colombia
| | - Bodo Raatz
- Bean Program, Agrobiodiversity Area, International Center for Tropical Agriculture (CIAT), Cali, Colombia.
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Jimenez-Sabado V, Casabella S, Izquierdo P, Tarifa C, Llach A, Colino H, Nolla-Colomer C, Ramirez O, Benitez R, Tauron M, Rodriguez-Font E, Cinca J, Hove-Madsen L. Treatment with beta-blockers normalizes RyR2 phosphorylation and calcium spark activity in atrial myocytes from patients with atrial fibrillation. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3691] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Atrial fibrillation has been associated with an increase in ryanodine receptor (RyR2) phosphorylation and local calcium release (calcium sparks). Carvedilol, a nonselective beta-adrenergic receptor blocker also inhibits the cardiac ryanodine receptor (RyR2), but it has been suggested that the enantiomer R-carvedilol only inhibits RyR2 activity and hence has the potential to inhibit calcium sparks without affecting RyR2 phosphorylation.
Purpose
This study aimed to determine the ability of the enantiomers R- and S-carvedilol to reverse RyR2 phosphorylation at s2808 and calcium sparks induced by the β2-adrenergic agonist fenoterol, in order to determine the relationship between RyR2 phosphorylation at s2808 and calcium spark frequency, and to assess the efficacy of R- and S-carvedilol.
Methods
Human right atrial myocytes were isolated and subjected to immunofluorescent labelling of total and s2808 phosphorylated RyR2, or loaded with fluo-4 and subjected to confocal calcium imaging. Beta-adrenergic receptors were first activated with 3μM fenoterol and then inhibited by different concentrations of carvedilol R- or S-enantiomers.
Results
Incubation of myocytes with fenoterol increased the s2808/RyR2 ratio from 0.32±0.03 to 0.66±0.05 (n=18, p<0.001). Incubation with 0.1, 0.3, 1 or 3μM R-carvedilol in the presence of fenoterol changed the s2808/RyR2 ratio to 0.64±0.05, 0.44±0.04, 0.34±0.07 and 0.28±0.05 (p<0.01) respectively. For comparison 3μM S-carvedilol reduced the s2808/RyR2 ratio to 0.23±0.06 in myocytes from 5 patients (p<0.01). Confocal calcium imaging revealed that fenoterol increased the spark density from 0.28±0.04 to 1.24±0.25 events/s/1000μm2 (n=9, p<0.01) and addition of 0.1, 0.3, or 1μM R-carvedilol changed the frequency to 1.32±0.52, 0.38±0.05, and 0.15±0.05 events/s/1000μm2 (p<0.01) respectively. Analysis of atrial myocytes from patients without atrial fibrillation revealed that the s2808/RyR2 ratio was similar in 25 patients treated with beta-blockers (0.39±0.04) and 57 that did not receive beta-blockers (0.44±0.03, p=0.33) while the s2808/RyR2 ratio was significantly smaller in 16 patients with atrial fibrillation receiving beta-blockers (0.43±0.08) than in 5 patients that did not (0.80±0.19, p<0.05).
Conclusions
R-carvedilol reverses the effects of beta-adrenergic stimulation on s2808 phosphorylation and calcium sparks in human atrial myocytes, and treatment with beta-blockers reduces excessive RyR2 phosphorylation at s2808 in patients with atrial fibrillation to levels observed in those without the arrhythmia, pointing to beta-adrenergic receptors as a target for controlling RyR2 phophorylation and activity in atrial fibrillation.
Funding Acknowledgement
Type of funding source: Public grant(s) – National budget only. Main funding source(s): Spanish Ministry of Science and Innovation & Spanish Ministry of Health and Consume
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Affiliation(s)
| | - S Casabella
- Biomedical Research Institute Barcelona IIBB-CSIC, Barcelona, Spain
| | - P Izquierdo
- Biomedical Research Institute Barcelona IIBB-CSIC, Barcelona, Spain
| | - C Tarifa
- Biomedical Research Institute Barcelona IIBB-CSIC, Barcelona, Spain
| | - A Llach
- Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - H Colino
- Biomedical Research Institute Barcelona IIBB-CSIC, Barcelona, Spain
| | | | - O Ramirez
- Biomedical Research Institute Barcelona IIBB-CSIC, Barcelona, Spain
| | - R Benitez
- Polytechnic University of Catalonia, Barcelona, Spain
| | - M Tauron
- Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | | | - J Cinca
- CIBERCV, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - L Hove-Madsen
- Biomedical Research Institute Barcelona IIBB-CSIC, Barcelona, Spain
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Nolla-Colomer C, Tarifa C, Llach A, Jimenez-Sabado V, Vallmitjana A, Casabella S, Colino H, Izquierdo P, Casellas S, Rodriguez-Font E, Cinca J, Chen S, Benitez R, Hove-Madsen L. Pathological phosphorylation of the ryanodine receptor at s2808 increases the number of individual clusters activated per calcium spark and the calcium released per cluster. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3689] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Atrial fibrillation (AF) has been associated with an increase in ryanodine receptor (RyR2) phosphorylation and local calcium release (sparks), but it is not known how calcium dynamics of individual RyR2 clusters affect spark dimensions and properties.
Purpose
This study aimed to test the hypothesis that pathological alterations in the phosphorylation of individual RyR2 clusters at s2808 facilitate the fusion of spontaneous calcium release events from neighboring RyR2 clusters.
Methods
Cardiomyocytes from mice with GFP-tagged RyR2 or human right atrial tissue were subjected to confocal calcium imaging or immunofluorescent labelling of total and s2808 phosphorylated RyR2. Calcium signals were measured at a frame rate of 240 Hz in a 0.5 x 0.5 μm region of interest (ROI) for each GFP-tagged RyR2 cluster and spontaneous calcium release events were detected using a custom-made algorithm.
Results
Calcium sparks recorded in 41 myocytes with GFP-tagged RyR2s was due to the spontaneous opening of a single RyR2 cluster in 91.2±2.2% of the cells and two neighbouring clusters in (6.2±1.6%) of the cells. Events with two clusters had bigger amplitude (0.14±0.01 vs. 0.10±0.01, p<0.05), were wider (1.43±0.03 vs. 1.13±0.04 μm, p<0.05), and lasted longer at half maximum (59.8±5.2 vs. 44.4±2.4 ms, p<0.01). Consequently, the calcium spark mass, measured as the time integral of the spark in each ROI increased from 9.2±1.6 for 1 cluster to 17.8±3.5 a.u. for 2 clusters (p<0.01). Interestingly, sparks lasted longer (79±5 vs. 61±4 ms, p<0.001) were wider (3.0±0.2 vs. 2.2±0.1 μm, p>0.001) and had bigger mass (31.5±3.3 vs. 21.9±3.3 a.u, p<0.01) in atrial myocytes from 21 patients with AF than in 27 without. Because phosphorylation of RyR2 clusters at s2808 (s2808/total RyR2) was higher in patients with than without AF (0.80±0.19 vs. 0.44±0.03, p<0.05), we tested how stimulation of RyR2 phosphorylation at s2808 with the β2-adrenergic agonist fenoterol (3μM) affected calcium release in individual RyR2 clusters. Fenoterol increased s2808 phosphoryaltion from 0.39±0.05 to 0.79±0.16 (p<0.05, n=9). It also increased the mass of sparks with 1 RyR2 cluster (from 9.2±1.1 to 16.0±2.3 a.u., p<0.01) and sparks with 2 clusters from 17.8±3.5 to 23.6±2.7 a.u. Moreover, it increased the fraction of sparks with 2 clusters from 6.2±1.6% to 19.3±3.3% (p<0.01) and sparks with 3 clusters reached 6.3±1.9% in the presence of fenoterol.
Conclusions
The calcium spark mass recorded in patients without AF is comparable to that recorded during activation of calcium release from one or two GFP-tagged RyR2 clusters. The larger mass and slower kinetics of sparks recorded in patients with AF is compatible with an increase in the calcium released from each RyR2 cluster and a 3-fold increase in sparks with 2 or 3 RyR2 clusters observed in GFP-tagged RyR2s when phosphorylation at s2808 is increased to levels observed in atrial fibrillation.
Funding Acknowledgement
Type of funding source: Public grant(s) – National budget only. Main funding source(s): Spanish Ministry of Science and Innovation; Generatlitat de Catalunya
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Affiliation(s)
| | - C Tarifa
- Polytechnic University of Catalonia, Barcelona, Spain
| | - A Llach
- Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | | | - A Vallmitjana
- Polytechnic University of Catalonia, Barcelona, Spain
| | - S Casabella
- Biomedical Research Institute Barcelona IIBB-CSIC, Barcelona, Spain
| | - H Colino
- Biomedical Research Institute Barcelona IIBB-CSIC, Barcelona, Spain
| | - P Izquierdo
- Biomedical Research Institute Barcelona IIBB-CSIC, Barcelona, Spain
| | - S Casellas
- Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | | | - J Cinca
- Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - S.R.W Chen
- Libin Cardiovascular Institute of Alberta, Calgary, Canada
| | - R Benitez
- Polytechnic University of Catalonia, Barcelona, Spain
| | - L Hove-Madsen
- Biomedical Research Institute Barcelona IIBB-CSIC, Barcelona, Spain
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Berry M, Izquierdo P, Jeffery H, Shaw S, Nchimbi-Msolla S, Cichy K. QTL analysis of cooking time and quality traits in dry bean (Phaseolus vulgaris L.). Theor Appl Genet 2020; 133:2291-2305. [PMID: 32377883 DOI: 10.1007/s00122-020-03598-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 04/13/2020] [Indexed: 06/11/2023]
Abstract
Three robust QTL for dry bean cooking time shortened cooking time 11-26 min and co-localized with QTL for increased cooked seed protein concentration. Cooking time is a major factor associated with consumer preference of dry beans (Phaseolus vulgaris L.). The genetic control of cooking time was investigated with a quantitative trait loci (QTL) study on a recombinant inbred line (RIL) population developed from TZ-27 (slow cooking) and TZ-37 (fast cooking). The RIL population of 146 lines was grown on research farms over 2 years in Arusha and Morogoro, Tanzania. Arusha is an important mid-altitude bean-growing region, with moderate temperatures and reliable rainfall, whereas the low altitude and high temperatures in Morogoro make it unfavorable for bean production. The population exhibited large variation for cooking time with a range of 22-98 min. On average, beans grown in Arusha cooked 15 min faster than those grown in Morogoro. A linkage map developed with 1951 SNP markers was used for QTL analysis. Ten QTL were identified for cooking time, three of which were found in multiple environments. RILs with all three QTL (CT3.1, CT6.1, and CT11.2) cooked on average 11 min faster in Arusha and 26 min faster in Morogoro than RILs with none. Seed attributes were related to cooking time such that seeds with greater seed mass and less seed coat percentage cooked faster. Cooked seed protein concentration ranged from 17.8 to 30.8% across the years and locations. All three of the most robust cooking time QTL co-localized with QTL for protein concentration, and TZ-37 always contributed faster cooking time and increased protein concentration.
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Affiliation(s)
- M Berry
- Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
| | - P Izquierdo
- Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
| | - H Jeffery
- Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
| | - S Shaw
- Sugarbeet and Bean Research Unit, USDA-ARS, Michigan State University, 1066 Bogue St. A366, East Lansing, MI, 48824, USA
| | | | - K Cichy
- Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA.
- Sugarbeet and Bean Research Unit, USDA-ARS, Michigan State University, 1066 Bogue St. A366, East Lansing, MI, 48824, USA.
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Raez L, Saravia D, Sumarriva D, Ruiz R, Izquierdo P, Cress D, Hunis B, Mas L, Lopes G, Kaen D. P2.16-15 Survival and Clinical Immunotherapy Outcomes in Hispanic Patients vs Non-Hispanic White Patients with Non-Small Cell Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1882] [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: 11/28/2022]
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Raez L, Saravia D, Munoz-Antonia T, Ruiz R, Cress D, Chiappori A, Hunis B, Sumarriva D, Powery H, Mas Lopez L, Lopes G, Izquierdo P, Antonia S. P2.15-23 Are there Ethnic Disparities in the Clinical Outcomes of Non-Small Cell Lung Cancer Hispanic Patients Treated with Immunotherapy? J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1465] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Saravia D, Raez L, Ruiz R, Munoz-Antonia T, Sumarriva D, Cress D, Hunis B, Chiappori A, Powery H, Izquierdo P, Mas L, Lopes G, Antonia S. PS4 Clinical Outcomes in Hispanic Patients Treated with Checkpoint Inhibitors. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.07.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Izquierdo P, Astudillo C, Blair MW, Iqbal AM, Raatz B, Cichy KA. Meta-QTL analysis of seed iron and zinc concentration and content in common bean (Phaseolus vulgaris L.). Theor Appl Genet 2018; 131:1645-1658. [PMID: 29752522 DOI: 10.1007/s00122-018-3104-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 05/02/2018] [Indexed: 05/03/2023]
Abstract
Twelve meta-QTL for seed Fe and Zn concentration and/or content were identified from 87 QTL originating from seven population grown in sixteen field trials. These meta-QTL include 2 specific to iron, 2 specific to zinc and 8 that co-localize for iron and zinc concentrations and/or content. Common bean (Phaseolus vulgaris L.) is the most important legume for human consumption worldwide and it is an important source of microelements, especially iron and zinc. Bean biofortification breeding programs develop new varieties with high levels of Fe and Zn targeted for countries with human micronutrient deficiencies. Biofortification efforts thus far have relied on phenotypic selection of raw seed mineral concentrations in advanced generations. While numerous quantitative trait loci (QTL) studies have been conducted to identify genomic regions associated with increased Fe and Zn concentration in seeds, these results have yet to be employed for marker-assisted breeding. The objective of this study was to conduct a meta-analysis from seven QTL studies in Andean and Middle American intra- and inter-gene pool populations to identify the regions in the genome that control the Fe and Zn levels in seeds. Two meta-QTL specific to Fe and two meta-QTL specific to Zn were identified. Additionally, eight Meta QTL that co-localized for Fe and Zn concentration and/or content were identified across seven chromosomes. The Fe and Zn shared meta-QTL could be useful candidates for marker-assisted breeding to simultaneously increase seed Fe and Zn. The physical positions for 12 individual meta-QTL were identified and within five of the meta-QTL, candidate genes were identified from six gene families that have been associated with transport of iron and zinc in plants.
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Affiliation(s)
- Paulo Izquierdo
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
| | - Carolina Astudillo
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
| | - Matthew W Blair
- Department of Agricultural and Environmental Sciences, Tennessee State University, Nashville, TN, USA
| | - Asif M Iqbal
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
| | - Bodo Raatz
- International Center for Tropical Agriculture, Cali, Colombia
| | - Karen A Cichy
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA.
- Sugarbeet and Bean Research Unit, USDA-ARS East Lansing, East Lansing, MI, USA.
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Perea C, De La Hoz JF, Cruz DF, Lobaton JD, Izquierdo P, Quintero JC, Raatz B, Duitama J. Bioinformatic analysis of genotype by sequencing (GBS) data with NGSEP. BMC Genomics 2016; 17 Suppl 5:498. [PMID: 27585926 PMCID: PMC5009557 DOI: 10.1186/s12864-016-2827-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [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] [Indexed: 12/22/2022] Open
Abstract
Background Therecent development and availability of different genotype by sequencing (GBS) protocols provided a cost-effective approach to perform high-resolution genomic analysis of entire populations in different species. The central component of all these protocols is the digestion of the initial DNA with known restriction enzymes, to generate sequencing fragments at predictable and reproducible sites. This allows to genotype thousands of genetic markers on populations with hundreds of individuals. Because GBS protocols achieve parallel genotyping through high throughput sequencing (HTS), every GBS protocol must include a bioinformatics pipeline for analysis of HTS data. Our bioinformatics group recently developed the Next Generation Sequencing Eclipse Plugin (NGSEP) for accurate, efficient, and user-friendly analysis of HTS data. Results Here we present the latest functionalities implemented in NGSEP in the context of the analysis of GBS data. We implemented a one step wizard to perform parallel read alignment, variants identification and genotyping from HTS reads sequenced from entire populations. We added different filters for variants, samples and genotype calls as well as calculation of summary statistics overall and per sample, and diversity statistics per site. NGSEP includes a module to translate genotype calls to some of the most widely used input formats for integration with several tools to perform downstream analyses such as population structure analysis, construction of genetic maps, genetic mapping of complex traits and phenotype prediction for genomic selection. We assessed the accuracy of NGSEP on two highly heterozygous F1 cassava populations and on an inbred common bean population, and we showed that NGSEP provides similar or better accuracy compared to other widely used software packages for variants detection such as GATK, Samtools and Tassel. Conclusions NGSEP is a powerful, accurate and efficient bioinformatics software tool for analysis of HTS data, and also one of the best bioinformatic packages to facilitate the analysis and to maximize the genomic variability information that can be obtained from GBS experiments for population genomics. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-2827-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Claudia Perea
- Agrobiodiversity Research Area, International Center for Tropical Agriculture (CIAT), Cali, 763537, Colombia
| | - Juan Fernando De La Hoz
- Agrobiodiversity Research Area, International Center for Tropical Agriculture (CIAT), Cali, 763537, Colombia
| | - Daniel Felipe Cruz
- Agrobiodiversity Research Area, International Center for Tropical Agriculture (CIAT), Cali, 763537, Colombia.,Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, 9052, Belgium
| | - Juan David Lobaton
- Agrobiodiversity Research Area, International Center for Tropical Agriculture (CIAT), Cali, 763537, Colombia
| | - Paulo Izquierdo
- Agrobiodiversity Research Area, International Center for Tropical Agriculture (CIAT), Cali, 763537, Colombia
| | - Juan Camilo Quintero
- Agrobiodiversity Research Area, International Center for Tropical Agriculture (CIAT), Cali, 763537, Colombia.,Gerencia de Procesos, Centro Médico Imbanaco, Cali, 760033, Colombia
| | - Bodo Raatz
- Agrobiodiversity Research Area, International Center for Tropical Agriculture (CIAT), Cali, 763537, Colombia
| | - Jorge Duitama
- Agrobiodiversity Research Area, International Center for Tropical Agriculture (CIAT), Cali, 763537, Colombia.
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Casarejos E, Alvarez-Pol H, Cortina-Gil D, Durán I, Izquierdo P, Yañez P, Vilán J. The mechanical design of the BARREL section of the detector CALIFA for R 3B-FAIR. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146611037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Casarejos E, Alvarez-Pol H, Cortina-Gil D, Durán I, Iglesias A, Izquierdo P, Yañez P, Vilán J. Design and construction of the structure of the DEMONSTRATOR of the CALIFA detector for R 3B-FAIR using carbon-fiber composites. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146611038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Fandiño J, Silva M, Izquierdo P, Candal A, Díaz I, Fernández C, Gesto C, Poncet M, Soto M, Triana G, Losada C, Mariño A. CBCT-guided RapidArc® for stereotactic ablative radiotherapy (SABR) in lung tumors. Rep Pract Oncol Radiother 2013. [DOI: 10.1016/j.rpor.2013.03.300] [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] Open
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22
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Fandiño J, Triana G, Gesto C, Díaz I, Candal A, Fernández C, Izquierdo P, Poncet M, Silva M, Soto M, Losada C, Mariño A. RapidArc® for head and neck cancer (200 patients experience). Rep Pract Oncol Radiother 2013. [DOI: 10.1016/j.rpor.2013.03.760] [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: 11/29/2022] Open
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Blair MW, Izquierdo P, Astudillo C, Grusak MA. A legume biofortification quandary: variability and genetic control of seed coat micronutrient accumulation in common beans. Front Plant Sci 2013; 4:275. [PMID: 23908660 PMCID: PMC3725406 DOI: 10.3389/fpls.2013.00275] [Citation(s) in RCA: 18] [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] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Accepted: 07/04/2013] [Indexed: 05/07/2023]
Abstract
Common beans (Phaseolus vulgaris L.), like many legumes, are rich in iron, zinc, and certain other microelements that are generally found to be in low concentrations in cereals, other seed crops, and root or tubers and therefore are good candidates for biofortification. But a quandary exists in common bean biofortification: namely that the distribution of iron has been found to be variable between the principal parts of seed; namely the cotyledonary tissue, embryo axis and seed coat. The seed coat represents ten or more percent of the seed weight and must be considered specifically as it accumulates much of the anti-nutrients such as tannins that effect mineral bioavailability. Meanwhile the cotyledons accumulate starch and phosphorus in the form of phytates. The goal of this study was to evaluate a population of progeny derived from an advanced backcross of a wild bean and a cultivated Andean bean for seed coat versus cotyledonary minerals to identify variability and predict inheritance of the minerals. We used wild common beans because of their higher seed mineral concentration compared to cultivars and greater proportion of seed coat to total seed weight. Results showed the most important gene for seed coat iron was on linkage group B04 but also identified other QTL for seed coat and cotyledonary iron and zinc on other linkage groups, including B11 which has been important in studies of whole seed. The importance of these results in terms of physiology, candidate genes and plant breeding are discussed.
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Affiliation(s)
- Matthew W. Blair
- Department of Plant Breeding and Genetics, Cornell UniversityIthaca, NY, USA
- *Correspondence: Matthew W. Blair, Department of Plant Breeding and Genetics, Cornell University Ithaca, 242 Emerson Hall, NY 14853, USA e-mail:
| | - Paulo Izquierdo
- CENICAÑA – Centro Nacional de Investigación en CañaCandelaria, Valle de Cauca, Colombia
| | | | - Michael A. Grusak
- Department of Pediatrics, USDA-ARS Children's Nutrition Research Center, Baylor College of MedicineHouston, TX, USA
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Blair MW, Izquierdo P. Use of the advanced backcross-QTL method to transfer seed mineral accumulation nutrition traits from wild to Andean cultivated common beans. Theor Appl Genet 2012; 125:1015-31. [PMID: 22718301 DOI: 10.1007/s00122-012-1891-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 04/27/2012] [Indexed: 05/03/2023]
Abstract
Iron deficiency anemia and zinc deficiency are major health concerns across the world and can be addressed by biofortification breeding of higher mineral concentration in staple crops, such as common bean. Wild common beans have for the most part had higher average seed mineral concentration than cultivars of this species but have small un-commercial seeds. A logical approach for the transfer of the seed mineral trait from wild beans to cultivated beans is through the advanced backcross breeding approach. The goal of this study was to analyze a population of 138 BC(2)F(3:5) introgression lines derived from the very high iron wild genotype G10022 backcrossed into the genetic background of the commercial-type variety 'Cerinza', a large-red seeded bush bean cultivar of the Andean genepool. In addition to measuring seed mineral accumulation traits and the quantitative trait loci (QTL) controlling these traits we were interested in simultaneously testing the adaptation of the introgression lines in two replicated yield trials. We found the cross to have high polymorphism and constructed an anchored microsatellite map for the population that was 1,554-cM long and covered all 11 linkage groups of the common bean genome. Through composite interval mapping (CIM) and single point analysis (SPA), we identified associations of markers and mineral traits on b01, b06, b07, b08, b10 and b11 for seed iron concentration, and markers on b01, b04 and b10 for seed zinc concentration. The b07 and b08 QTL aligned with previous QTL for iron concentration. A large number of QTL were found for seed weight (9 with CIM and 36 with SPA analysis) and correlations between seed size and mineral content affected the identification of iron and zinc contents' QTL on many linkage groups. Segregation distortion around domestication genes made some areas difficult to introgress. However, in conclusion, the advanced backcross program produced some introgression lines with high mineral accumulation traits using a wild donor parent.
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Affiliation(s)
- Matthew W Blair
- Universidad Nacional de Colombia, Km 12 via Chapinero, Palmira, Valle, Colombia.
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25
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Izquierdo P, Wiechers JW, Escribano E, García-Celma MJ, Tadros TF, Esquena J, Dederen JC, Solans C. A Study on the Influence of Emulsion Droplet Size on the Skin Penetration of Tetracaine. Skin Pharmacol Physiol 2007; 20:263-70. [PMID: 17641530 DOI: 10.1159/000106076] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [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: 02/19/2007] [Accepted: 04/27/2007] [Indexed: 11/19/2022]
Abstract
OBJECTIVES/AIMS The influence of emulsion droplet size on the skin penetration of a model drug, tetracaine, was studied. For this purpose, in vitro dermal and transdermal delivery of tetracaine from 6 emulsions (3 macro-emulsions with droplet sizes >1 microm and 3 nano-emulsions with droplet sizes <100 nm) were tested. METHODS Two approaches were used: in the first one, the composition of the emulsions was kept constant, while in the second one, the surfactant concentration in the aqueous phase was kept constant by varying the overall surfactant concentration. RESULTS The results from emulsions differing only in droplet size did not provide statistically significant evidence for the anticipated increase in transdermal or dermal delivery (after 24 h) when reducing emulsion droplet size. The same results were obtained when the surfactant concentration in the aqueous phase was kept constant, indicating that there is no influence of emulsion droplet size on the skin penetration of tetracaine within the droplet size range studied. CONCLUSION This is in contrast to what has been reported in various publications that claim penetration to increase with reducing droplet size. It should be noted that the results reported so far are based on emulsions that apart from droplet size also differed in composition and/or system components.
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Affiliation(s)
- P Izquierdo
- Departament de Tecnologia de Tensioactius, Institut d'Investigacions Químiques i Ambientals de Barcelona, CSIC, Barcelona, Spain
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Izquierdo P, Gutiérrez MC, Gómez-Hens A, Pérez-Bendito D. Simultaneous Determination of Cephradine and Cephalexin in Serum by Derivative Synchronous Fluorescence Spectroscopy. ANAL LETT 2006. [DOI: 10.1080/00032719008052459] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Letelier ME, Izquierdo P, Godoy L, Lepe AM, Faúndez M. Liver microsomal biotransformation of nitro-aryl drugs: mechanism for potential oxidative stress induction. J Appl Toxicol 2004; 24:519-25. [PMID: 15558828 DOI: 10.1002/jat.999] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Toxic effects of several nitro-aryl drugs are attributed to the nitro-reduction that may be suffered in vivo, a reaction that may be catalysed by different reductases. One of these enzymes is NADPH-cytochrome P450 reductase, which belongs to the cytochrome P450 oxidative system mainly localized in the endoplasmic reticulum of the hepatic cell. This system is responsible for the biotransformation of oxidative lipophilic compounds, so that oxidative and reductive metabolic pathways of lipophilic nitro-aryl drugs can take place simultaneously. Because of the affinity of nitro-aryl drugs (xenobiotics) for the endoplasmic reticulum, we propose this subcellular organelle as a good biological system for investigating the toxicity induced by the biotransformation of these or another compounds. In this work we used rat liver microsomes to assess the oxidative stress induced by nitro-aryl drug biotransformation. Incubation of microsomes of rat liver with nifurtimox and nitrofurantoin in the presence of NADPH induced lipoperoxidation, UDP-glucuronyltransferase activation and an increase in the basal microsomal oxygen consumption. Nitro-aryl-1,4-dihydropyridines did not elicit these prooxidant effects; furthermore, they inhibited lipoperoxidation and oxygen consumption induced by Fe3+/ascorbate. Nifurtimox and nitrofurantoin modified the maximum absorption of cytochrome P450 oxidase and inhibited p-nitroanisole O-demethylation, an oxidative reaction catalysed by the cytochrome P450 system, signifying that oxidation may proceed in a similar way to that described for nitro-aryl-1,4-dihydropyridines. Thus the balance between lipophilic nitro-aryl drug oxidation and reduction may be involved in the potential oxidative stress induced by biotransformation.
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Affiliation(s)
- M E Letelier
- Laboratorio de Farmacología, Departamento de Química Farmacológica y Toxicológica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Olivos 1007, Independencia, Santiago, Chile.
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Abstract
This review describes the principles of formation and stability of nano-emulsions. It starts with an introduction highlighting the main advantages of nano-emulsions over macroemulsions for personal care and cosmetic formulations. It also describes the main problems with lack of progress on nano-emulsions. The second section deals with the mechanism of emulsification and the dynamic light scattering technique for measurement of the droplet size of nano-emulsions. This is followed by a section on methods of emulsification and the role of surfactants. Three methods are described for nano-emulsion preparation, namely high energy emulsification (using homogenisers), low energy emulsification whereby water is added to an oil solution of the surfactant and the principle of the phase inversion temperature (PIT). A section is devoted to steric stabilisation and the role of the adsorbed layer thickness. The problem of Ostwald ripening (which is the main instability process of nano-emulsions) is described in some detail. The methods that can be applied to reduce Ostwald ripening are briefly described. This involves the addition of a second less soluble oil phase such as squalene and/or addition of a strongly adsorbed and water insoluble polymeric surfactant. The last part of the review gives some examples of nano-emulsions that are prepared by the PIT method as well as using high pressure homogeniser. A comparison of the two methods is given and the rate of Ostwald ripening is measured in both cases. The effect of changing the alkyl chain length and branching of the oil was investigated using decane, dodecane, tertadecane, hexadecane and isohexadecane. The branched oil isohexadcecane showed higher Ostwald ripening rate when compared with a linear chain oil with the same carbon number.
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Corrales E, Llorens S, Izquierdo P, Jiménez B, Moreno F. [Subcutaneous route in palliative care. Efficient alternative in drug administration in advanced oncologic patients]. Rev Enferm 2003; 26:12-3. [PMID: 14664115] [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] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Affiliation(s)
- E Corrales
- Servicio de Cuidados Paliativos de l'Institut Català d'Oncologia, Hospitalet de Llobregat, Barcelona
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Márquez Salas E, Benitez Payares B, Méndez Gil N, Rangel Matos L, Medrano I, Venencia I, Izquierdo P, Romero R, Castejón HV. [Nutritional characteristics of a cookie formulated with bovine blood plasma as a main source of protein]. Arch Latinoam Nutr 1998; 48:250-5. [PMID: 9951540] [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] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
The nutritional characteristics of a cookie formulated with bovine plasma as main protein source was evaluated. Bovine plasma was mixed with wheat flour, sugar or salt, condiments and vegetable oil. The mix was placed in trays and baking at 120 degrees C during 1 hour. Moisture, fat, protein, carbohydrate, metabolizable energy, ash, iron, essential amino acids, essential fatty acids, apparent digestibility, protein efficiency ratio, acceptability and tolerance of the final product were determined. Results indicated that 100 g of the cookie have 5 g of moisture, 16 g of fat, 16 g of protein, 61.4 g of carbohydrate, 408.2 Kcal of metabolizable energy, 1.59 g of ash, 1.9 mg of iron and 6.59 g of essential amino acids. Polyunsaturated fatty acids are in higher amount than saturated fatty acids. Results also indicated that 100 g of cookie provide at least 20% of the daily energy requirements, 24% of the iron and between 30 to 50% of the daily protein requirements for children at school age. Its digestibility and PER, tested in rats, were of 88.4% and 2.32 respectively. Acceptability and tolerance, both tested in children, were 97% and 100% respectively. The protein cookie could be included as a protein and energy supply in school meals.
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Sáiz Hervas E, Castilla Castellano V, Miquel Plaza J, Benito Blanco AM, Martín Llorens MM, Pastor de Blas M, Izquierdo P, Muñoz Jareño MA, Sierra A, Nieto MA, Moreno Collado AM, Fraguas C. [Impact of zidovudine treatment and the pneumocystis carinii prophylaxis in natural history of patients with HIV infection]. An Med Interna 1998; 15:132-7. [PMID: 9580410] [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] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Early use of prophylactic regimens against Pneumocystis carinii and zidovudine therapy, may have modified the natural history of patients with HIV-1 infection. We describe the incidence of opportunistic infections and analize the mortality rate in those patients to check the occurrence of any change in the above mentioned natural history. PATIENTS Clinical charts of patients with HIV-1 infection attending our hospital are reviewed, from november 1987 to june 1994. RESULTS We found 200 patients with AIDS, documenting 64 (32%) deaths and 69 (34.5%) patients lost to follow-up. Seven HIV-1 infected patients (3.5%) received primary prophylaxis against Pneumocystis carinii and 17 (8.5%) zidovudine therapy before developing AIDS. Patients with AIDS receiving zidovudine therapy had a higher survival (median 50 months) than those not receiving such therapy (median 17 months; p < 0.001). Ninety one patients with tuberculosis receiving zidovudine therapy had also a higher survival than those not receiving antirretroviral therapy (p < 0.01). Eighty six patients with Pneumocystis carinii pneumonia receiving zidovudine had also a higher survival (p < 0.001). Likewise, patients on zidovudine treatment had a lower reduction on CD4 lymphocyte count. CONCLUSIONS The spectrum of AIDS-defining illnesses is similar to the whole country. We have not found any difference in the incidence of opportunistic infections, but we observed a trend to reduction in the incidence rate of PCP. The introduction of zidovudine therapy seems to have a positive influence on the survival of AIDS patients. This advantage is highlighted in those patients more immunodeficients at first.
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Affiliation(s)
- E Sáiz Hervas
- Servicio de Medicina Interna, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid
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Ubeda J, Briones A, Izquierdo P, Palop L. Predominant Saccharomyces cerevisiae strains in the fermentation of Airén grape musts with SO2. Lebensm Wiss Technol 1995. [DOI: 10.1016/0023-6438(95)90005-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Izquierdo P, Gómez-Hens A, Pérez-Bendito D. Simultaneous Stopped-Flow Determination of Tetracycline and Doxycycline in Serum Based on Lanthanide-Sensitized Luminescence. ANAL LETT 1994. [DOI: 10.1080/00032719408005984] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Izquierdo P, Pav�n P, G�mez-Hens A, P�rez-Bendito D. Kinetic fluorimetric determination of aminoglycoside antibiotics by use of OPA and N-acetylcysteine as reagents. ACTA ACUST UNITED AC 1994. [DOI: 10.1007/bf00323112] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [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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Abstract
The stopped-flow mixing technique was used to develop a simple, fast kinetic method for the determination of clavulanic acid by reaction with imidazole. Whereas the conventional method requires about 12-15 min for equilibrium to be reached, kinetic measurements can be made within a few seconds. The calibration graph was linear over the range 1-40 microgram ml-1 of clavulanic acid and the detection limit achieved was 0.3 microgram ml-1. The precision and selectivity of the method are reported. The results obtained by applying the proposed method to the analysis of pharmaceutical and serum samples show how easily it can be adapted for routine analyses.
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Affiliation(s)
- P Izquierdo
- Department of Analytical Chemistry, Faculty of Sciences, University of Córdoba, Spain
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Dye TE, Izquierdo P. Abnormal venous valves: a cause of early obstruction of saphenous vein bypass grafts. Tex Heart Inst J 1983; 10:365-9. [PMID: 15226971 PMCID: PMC344366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
Factors other than technical error and poor run-off may account for occlusion or obstruction of aortocoronary vein bypass grafts in the early postoperative period. Four cases are presented in which graft obstruction was caused by venous valves. Discussion of the etiology of this problem and recommendations for its prevention are included.
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Affiliation(s)
- T E Dye
- Section of Cardiovascular Surgery, O'Connor Hospital, San Jose, California, USA
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Abstract
1. The subcellular distribution of malic enzyme in two different brain regions (frontal cortex and striatum) is studied in adult rats. 2. A bimodal distribution is found in both regions: 75% being localized in the mitochondrial fraction and the remaining 25% in the cytosol. 3. In the frontal cortex, free mitochondria is enriched with the enzyme, while, in striatum, free as well as synaptic mitochondria, presented the same activity. 4. Kinetic studies of the malic enzymes show two Km values when malate is used as substrate. A higher Km value for free mitochondria as compared with a lower one found for the cytosolic and synaptosomal mitochondria suggests the presence of two enzyme populations. 5. The following are common characteristics for the two enzyme populations: NADP dependence, use of either Mg2+ or Mn2+ as cofactor and hyperbolic malate saturation curves not affected by dicarboxylic acids.
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