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Carrillo P, González-Olalla JM, J Cabrerizo M, Villar-Argaiz M, Medina-Sánchez JM. Uneven response of phytoplankton-bacteria coupling under Saharan dust pulse and ultraviolet radiation in the south-western Mediterranean Sea. Sci Total Environ 2024; 927:172220. [PMID: 38588733 DOI: 10.1016/j.scitotenv.2024.172220] [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] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 03/21/2024] [Accepted: 04/02/2024] [Indexed: 04/10/2024]
Abstract
The microbial carbon (C) flux in the ocean is a key functional process governed by the excretion of organic carbon by phytoplankton (EOC) and heterotrophic bacterial carbon demand (BCD). Ultraviolet radiation (UVR) levels in upper mixed layers and increasing atmospheric dust deposition from arid regions may alter the degree of coupling in the phytoplankton-bacteria relationship (measured as BCD:EOC ratio) with consequences for the C-flux through these compartments in marine oligotrophic ecosystem. Firstly, we performed a field study across the south-western (SW) Mediterranean Sea to assess the degree of coupling (BCD:EOC) and how it may be related to metabolic balance (total primary production: community respiration; PPT:CR). Secondly, we conducted a microcosm experiment in two contrasting areas (heterotrophic nearshore and autotrophic open sea) to test the impact of UVR and dust interaction on microbial C flux. In the field study, we found that BCD was not satisfied by EOC (i.e., BCD:EOC >1; uncoupled phytoplankton-bacteria relationship). BCD:EOC ratio was negatively related to PPT:CR ratio across the SW Mediterranean Sea. A spatial pattern emerged, i.e. in autotrophic open sea stations uncoupling was less severe (BCD:EOC ranged 1-2), whereas heterotrophic nearshore stations uncoupling was more severe (BCD:EOC > 2). In the experimental study, in the seawater both enriched with dust and under UVR, BCD:EOC ratio decreased by stimulating autotrophic processes (particulate primary production (PPP) and EOC) in the heterotrophic nearshore area, whereas BCD:EOC increased by stimulating heterotrophic processes [heterotrophic bacterial production (HBP), bacterial growth efficiency (BGE), bacterial respiration (BR)] in the autotrophic open sea. Our results show that this spatial pattern could be reversed under future UVR × Dust scenario. Overall, the impact of greater dust deposition and higher UVR levels will alter the phytoplankton-bacteria C-flux with consequences for the productivity of both communities, their standing stocks, and ultimately, the ecosystem's metabolic balance at the sea surface.
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Affiliation(s)
- Presentación Carrillo
- Instituto Universitario de Investigación del Agua, Universidad de Granada, C/ Ramón y Cajal, nº4, 18071, Granada, Spain.
| | - Juan Manuel González-Olalla
- Instituto Universitario de Investigación del Agua, Universidad de Granada, C/ Ramón y Cajal, nº4, 18071, Granada, Spain.
| | - Marco J Cabrerizo
- Instituto Universitario de Investigación del Agua, Universidad de Granada, C/ Ramón y Cajal, nº4, 18071, Granada, Spain; Departamento de Ecología, Universidad de Granada, Campus Fuentenueva s/n, 18071 Granada, Spain.
| | - Manuel Villar-Argaiz
- Instituto Universitario de Investigación del Agua, Universidad de Granada, C/ Ramón y Cajal, nº4, 18071, Granada, Spain; Departamento de Ecología, Universidad de Granada, Campus Fuentenueva s/n, 18071 Granada, Spain.
| | - Juan Manuel Medina-Sánchez
- Instituto Universitario de Investigación del Agua, Universidad de Granada, C/ Ramón y Cajal, nº4, 18071, Granada, Spain; Departamento de Ecología, Universidad de Granada, Campus Fuentenueva s/n, 18071 Granada, Spain.
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Carrillo P, Bernal M, Téllez-Quijorna C, Marrero AD, Vidal I, Castilla L, Caro C, Domínguez A, García-Martín ML, Quesada AR, Medina MA, Martínez-Poveda B. The synthetic molecule stauprimide impairs cell growth and migration in triple-negative breast cancer. Biomed Pharmacother 2023; 158:114070. [PMID: 36526536 DOI: 10.1016/j.biopha.2022.114070] [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: 08/18/2022] [Revised: 11/30/2022] [Accepted: 12/02/2022] [Indexed: 12/15/2022] Open
Abstract
Stauprimide, a semi-synthetic derivative of staurosporine, is known mainly for its potent differentiation-enhancing properties in embryonic stem cells. Here, we studied the effects of stauprimide in cell growth and migration of triple-negative breast cancer cells in vitro, evaluating its potential antitumoral activity in an orthotopic mouse model of breast cancer in vivo. Our results from survival curves, EdU incorporation, cell cycle analysis and annexin-V detection in MDA-MB-231 cells indicated that stauprimide inhibited cell proliferation, arresting cell cycle in G2/M without induction of apoptosis. A decrease in the migratory capability of MDA-MB-231 was also assessed in response to stauprimide. In this work we pointed to a mechanism of action of stauprimide involving the modulation of ERK1/2, Akt and p38 MAPK signalling pathways, and the downregulation of MYC in MDA-MB-231 cells. In addition, orthotopic MDA-MB-231 xenograft and 4T1 syngeneic models suggested an effect of stauprimide in vivo, increasing the necrotic core of tumors and reducing metastasis in lung and liver of mice. Together, our results point to the promising role of stauprimide as a putative therapeutic agent in triple-negative breast cancer.
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Affiliation(s)
- P Carrillo
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - M Bernal
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - C Téllez-Quijorna
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain
| | - A D Marrero
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - I Vidal
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - L Castilla
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - C Caro
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - A Domínguez
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain
| | - M L García-Martín
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), Spain
| | - A R Quesada
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain; CIBER de Enfermedades Raras (CIBERER, Instituto de Salud Carlos III), Spain
| | - M A Medina
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain; CIBER de Enfermedades Raras (CIBERER, Instituto de Salud Carlos III), Spain
| | - B Martínez-Poveda
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, E-29071 Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/Severo Ochoa, 35, 29590, Málaga, Spain; CIBER de Enfermedades Cardiovasculares (CIBERCV, Instituto de Salud Carlos III, Madrid), Spain.
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Meler E, Martinez-Portilla RJ, Caradeux J, Mazarico E, Gil-Armas C, Boada D, Martinez J, Carrillo P, Camacho M, Figueras F. Severe smallness as predictor of adverse perinatal outcome in suspected late small-for-gestational-age fetuses: systematic review and meta-analysis. Ultrasound Obstet Gynecol 2022; 60:328-337. [PMID: 35748873 DOI: 10.1002/uog.24977] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 05/29/2022] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To investigate the performance of severe smallness in the prediction of adverse perinatal outcome among fetuses with suspected late-onset small-for-gestational age (SGA). METHODS A systematic search was performed to identify relevant studies in PubMed, Web of Science and Scopus. Late-onset SGA was defined as estimated fetal weight (EFW) or abdominal circumference (AC) < 10th percentile diagnosed at or after 32 weeks' gestation, while severe SGA was defined as EFW or AC < 3rd percentile or < 2 SD. Random-effects modeling was used to generate hierarchical summary receiver-operating-characteristics (HSROC) curves. The performance of severe SGA (as a presumptive diagnosis) in predicting adverse perinatal outcome among singleton pregnancies with suspected late-onset SGA was expressed as area under the HSROC curve (AUC), sensitivity, specificity and positive/negative likelihood ratios. The association between suspected severe SGA and adverse perinatal outcome was also assessed by random-effects modeling using the Mantel-Haenszel method and presented as odds ratio (OR). The non-exposed group was defined as non-severe SGA (EFW ≥ 3rd centile). RESULTS Twelve cohort studies were included in this systematic review and meta-analysis. The studies included a total of 3639 fetuses with suspected late-onset SGA, of which 1246 had suspected severe SGA. Significant associations were found between suspected severe SGA and composite adverse perinatal outcome (OR, 1.97 (95% CI, 1.33-2.92)), neonatal intensive care unit admission (OR, 2.87 (95% CI, 1.84-4.47)) and perinatal death (OR, 4.26 (95% CI, 1.07-16.93)). However, summary ROC curves showed limited performance of suspected severe SGA in predicting perinatal outcomes, with AUCs of 60.9%, 66.9%, 53.6%, 57.2%, 54.6% and 64.9% for composite adverse perinatal outcome, neonatal intensive care unit admission, neonatal acidosis, Cesarean section for intrapartum fetal compromise, low Apgar score and perinatal death, respectively. CONCLUSION Although suspected severe SGA was associated with a higher risk of perinatal complications, it performed poorly as a standalone parameter in predicting adverse perinatal outcome. © 2022 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- E Meler
- Fetal Medicine Research Center, BCNatal, Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), Institut Clínic de Ginecologia, Obstetrícia i Neonatologia, Universitat de Barcelona, Barcelona, Spain
| | - R J Martinez-Portilla
- Fetal Medicine Research Center, BCNatal, Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), Institut Clínic de Ginecologia, Obstetrícia i Neonatologia, Universitat de Barcelona, Barcelona, Spain
- Clinical Research Branch, National Institute of Perinatology, Mexico City, Mexico
| | - J Caradeux
- Fetal Medicine Unit, Clínica Santa María, Santiago, Chile
| | - E Mazarico
- Fetal Medicine Research Center, BCNatal, Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), Institut Clínic de Ginecologia, Obstetrícia i Neonatologia, Universitat de Barcelona, Barcelona, Spain
| | - C Gil-Armas
- Fetal Medicine Research Center, BCNatal, Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), Institut Clínic de Ginecologia, Obstetrícia i Neonatologia, Universitat de Barcelona, Barcelona, Spain
- National Maternal Perinatal Institute, Lima, Peru
| | - D Boada
- Fetal Medicine Research Center, BCNatal, Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), Institut Clínic de Ginecologia, Obstetrícia i Neonatologia, Universitat de Barcelona, Barcelona, Spain
| | - J Martinez
- Fetal Medicine Research Center, BCNatal, Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), Institut Clínic de Ginecologia, Obstetrícia i Neonatologia, Universitat de Barcelona, Barcelona, Spain
| | - P Carrillo
- Fetal Medicine Research Center, BCNatal, Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), Institut Clínic de Ginecologia, Obstetrícia i Neonatologia, Universitat de Barcelona, Barcelona, Spain
| | - M Camacho
- Fetal Medicine Research Center, BCNatal, Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), Institut Clínic de Ginecologia, Obstetrícia i Neonatologia, Universitat de Barcelona, Barcelona, Spain
| | - F Figueras
- Fetal Medicine Research Center, BCNatal, Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), Institut Clínic de Ginecologia, Obstetrícia i Neonatologia, Universitat de Barcelona, Barcelona, Spain
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Boutet M, Casals G, Valenzuela-Alcaraz B, García-Otero L, Crovetto F, Carrillo P, Borrás A, Cívico M, Manau D, Gratacós E, Crispi F. P-771 Subfertility versus in vitro fertilization procedures: unravelling the origins of fetal cardiac remodeling in assisted reproductive technologies. Hum Reprod 2022. [DOI: 10.1093/humrep/deac107.711] [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: 11/12/2022] Open
Abstract
Abstract
Study question
Do spontaneously conceived (SC) fetuses from subfertile couples present signs of cardiac remodeling as those observed after in vitro fertilization (IVF) treatments?
Summary answer
SC fetuses from subfertile couples do not associate cardiac remodeling, and their cardiac structure and function are similar to those of SC from fertile couples.
What is known already
Fetuses and children from IVF associate cardiac remodeling and suboptimal function, including dilated atria, more globular and thicker ventricles, reduced longitudinal motion and impaired relaxationin uteroand after birth. Fetal cardiac changes have been demonstrated both after fresh and frozen embryo transfer. The SC fetuses used as ‘controls’ in our previous publications were conceived by fertile couples thus making it difficult to separate the contribution of infertilityper sefrom the IVF procedures on cardiac programming. There are no previous cardiovascular studies investigating the independent effects of infertility in SC fetuses from subfertile couples (time-to-pregnancy (TTP) over 12 months).
Study design, size, duration
Prospective cohort study of 289 singleton pregnancies recruited from 2017 to 2021, including 96 SC pregnancies from fertile couples (TTP less than 12 months), 97 SC from subfertile couples (TTP over 12 months) and 96 from IVF after fresh ET. Fetal echocardiography was performed in all pregnancies. Epidemiological data and perinatal outcomes were collected in all pregnancies.
Participants/materials, setting, methods
IVF pregnancies from our centre were identified as eligible at pregnancy diagnosis. Eligible SC pregnancies from fertile and subfertile couples who attended our Maternal-Fetal Unit were invited to participate at third trimester, being matched to the IVF pregnancies by maternal age. Fetal echocardiography was performed at 29-34 weeks of pregnancy to assess cardiac structure and function. Echocardiographic comparisons were adjusted by nulliparity, birthweight centile, gestational age and estimated fetal weight at scan.
Main results and the role of chance
Parental age, ethnicity, body mass index and smoking exposure, median gestational age and estimated fetal weight were similar in all study groups. There were no significant differences in infertility duration or aetiology between the subfertile and the IVF populations (TTP: subfertile median 30 months [IQR 20-54] versus IVF: 47 [25-61]; p-value=0.052). While both fertile and subfertile SC groups presented similar fetal cardiac results, IVF fetuses showed larger atria (right atria-to-heart ratio: IVF mean 18.9% [SD 3.4] versus subfertile 17.8% [3.5] versus fertile 17.6% [3.3]; adjusted P-value<0.001), more globular ventricles (right ventricular sphericity index: IVF 1.56 [0.25] versus subfertile 1.72 [0.26] versus fertile 1.72 [0.26]; <0.001), and thicker myocardial walls (relative wall thickness: IVF 0.86 [0.22] versus subfertile 0.64 [0.13] versus fertile 0.64 [0.18]; <0.001). Whereas SC fetuses from fertile and subfertile couples had preserved cardiac function, IVF fetuses showed signs of suboptimal systolic and diastolic function with reduced tricuspid ring displacement (IVF 7.26 mm [1.07] versus subfertile 8.04 mm [1.18] versus fertile 7.89 mm [1.51]; <0.001) and increased left myocardial performance index (IVF 0.49 [0.08] versus subfertile 0.45 [0.09] versus fertile 0.45 [0.10]; <0.001). A sub-analysis including only unexplained infertility cases in subfertile SC and IVF groups showed similar results.
Limitations, reasons for caution
The fetal cardiac changes reported here are subclinical, with most cardiovascular parameters lying within normal ranges. Although echocardiographic changes are recognized as potential cardiovascular risk factors, their association with long-term cardiovascular disease remains to be proven.
Wider implications of the findings
Subfertility per se does not seem to be associated to fetal cardiac remodeling, which have been previously described in IVF fetuses. Future studies are warranted to further investigate the factors related to fetal cardiac changes associated to ART.
Trial registration number
Not a trial
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Affiliation(s)
- M.L Boutet
- Barcelona Center for Maternal-Fetal and Neonatal Medicine Hospital Clínic and Hospital Sant Joan de Déu, Universitat de Barcelona , Barcelona, Spain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer IDIBAPS, Universitat de Barcelona , Barcelona, Spain
| | - G Casals
- Institut d'Investigacions Biomèdiques August Pi i Sunyer IDIBAPS, Universitat de Barcelona , Barcelona, Spain
- Assisted Reproduction Unit- Hospital Clínic de Barcelona, Universitat de Barcelona , Barcelona, Spain
| | - B Valenzuela-Alcaraz
- Barcelona Center for Maternal-Fetal and Neonatal Medicine Hospital Clínic and Hospital Sant Joan de Déu, Universitat de Barcelona , Barcelona, Spain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer IDIBAPS, Universitat de Barcelona , Barcelona, Spain
| | - L García-Otero
- Barcelona Center for Maternal-Fetal and Neonatal Medicine Hospital Clínic and Hospital Sant Joan de Déu, Universitat de Barcelona , Barcelona, Spain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer IDIBAPS, Universitat de Barcelona , Barcelona, Spain
| | - F Crovetto
- Barcelona Center for Maternal-Fetal and Neonatal Medicine Hospital Clínic and Hospital Sant Joan de Déu, Universitat de Barcelona , Barcelona, Spain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer IDIBAPS, Universitat de Barcelona , Barcelona, Spain
- Centre for Biomedical Research on Rare Diseases CIBER-ER, Madrid , Madrid, Spain
| | - P Carrillo
- Barcelona Center for Maternal-Fetal and Neonatal Medicine Hospital Clínic and Hospital Sant Joan de Déu, Universitat de Barcelona , Barcelona, Spain
- Assisted Reproduction Unit- Hospital Clínic de Barcelona, Universitat de Barcelona , Barcelona, Spain
| | - A Borrás
- Assisted Reproduction Unit- Hospital Clínic de Barcelona, Universitat de Barcelona , Barcelona, Spain
| | - M.S Cívico
- Institut d'Investigacions Biomèdiques August Pi i Sunyer IDIBAPS, Universitat de Barcelona , Barcelona, Spain
- Assisted Reproduction Unit- Hospital Clínic de Barcelona, Universitat de Barcelona , Barcelona, Spain
| | - D Manau
- Institut d'Investigacions Biomèdiques August Pi i Sunyer IDIBAPS, Universitat de Barcelona , Barcelona, Spain
- Assisted Reproduction Unit- Hospital Clínic de Barcelona, Universitat de Barcelona , Barcelona, Spain
| | - E Gratacós
- Barcelona Center for Maternal-Fetal and Neonatal Medicine Hospital Clínic and Hospital Sant Joan de Déu, Universitat de Barcelona , Barcelona, Spain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer IDIBAPS, Universitat de Barcelona , Barcelona, Spain
- Centre for Biomedical Research on Rare Diseases CIBER-ER, Madrid , Madrid, Spain
| | - F Crispi
- Barcelona Center for Maternal-Fetal and Neonatal Medicine Hospital Clínic and Hospital Sant Joan de Déu, Universitat de Barcelona , Barcelona, Spain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer IDIBAPS, Universitat de Barcelona , Barcelona, Spain
- Centre for Biomedical Research on Rare Diseases CIBER-ER, Madrid , Madrid, Spain
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Cabrerizo MJ, Medina-Sánchez JM, González-Olalla JM, Sánchez-Gómez D, Carrillo P. Microbial plankton responses to multiple environmental drivers in marine ecosystems with different phosphorus limitation degrees. Sci Total Environ 2022; 816:151491. [PMID: 34752863 DOI: 10.1016/j.scitotenv.2021.151491] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 10/21/2021] [Accepted: 11/03/2021] [Indexed: 06/13/2023]
Abstract
Multiple drivers are threatening the functioning of the microbial food webs and trophic interactions. Our understanding about how temperature, CO2, nutrient inputs, and solar ultraviolet radiation (UVR) availability interact to alter ecosystem functioning is scarce because research has focused on single and double interactions. Moreover, the role that the degree of in situ nutrient limitation could play in the outcome of these interactions has been largely neglected, despite it is predominant in marine ecosystems. We address these uncertainties by combining remote-sensing analyses, and a collapsed experimental design with natural microbial communities from Mediterranean Sea and Atlantic Ocean exposed to temperature, nutrients, CO2, and UVR interactions. At the decade scale, we found that more intense and frequent (and longer lasting) Saharan dust inputs (and marine heatwaves) were only coupled with reduced phytoplankton biomass production. When microbial communities were concurrently exposed to future temperature, CO2, nutrient, and UVR conditions (i.e. the drivers studied over long-term scales), we found shifts from net autotrophy [primary production:respiration (PP:R) ratio > 1] towards a metabolic equilibrium (PP:R ratio ~ 1) or even a net heterotrophy (PP:R ratio < 1), as P-limitation degree was higher (i.e. Atlantic Ocean). These changes in the metabolic balance were coupled with a weakened phytoplankton-bacteria interaction (i.e. bacterial carbon demand exceeded phytoplankton carbon supply. Our work reveals that an accentuated in situ P limitation may promote reductions both in carbon uptake and fluxes between trophic levels in microbial plankton communities under global-change conditions. We show that considering long-term series can aid in identifying major local environmental drivers (i.e. temperature and nutrients in our case), easing the design of future global-change studies, but also that the abiotic environment to which microbial plankton communities are acclimated should be taken into account to avoid biased predictions concerning the effects of multiple interacting global-change drivers on marine ecosystems.
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Affiliation(s)
- Marco J Cabrerizo
- Departamento de Ecología y Biología Animal, Facultad de Ciencias del Mar, Universidad de Vigo, Campus Lagoas Marcosende s/n, 36310 Vigo, Spain; Centro de Investigación Mariña, Universidad de Vigo (CIM-UVigo), Illa de Toralla s/n, 36331 Vigo, Spain; Departamento de Ecología, Universidad de Granada, Campus Fuentenueva s/n, 18071 Granada, Spain.
| | - Juan Manuel Medina-Sánchez
- Departamento de Ecología, Universidad de Granada, Campus Fuentenueva s/n, 18071 Granada, Spain; Instituto Universitario de Investigación del Agua, C/Ramón y Cajal, n 4, 18071 Granada, Spain
| | | | - Daniel Sánchez-Gómez
- Instituto Universitario de Investigación del Agua, C/Ramón y Cajal, n 4, 18071 Granada, Spain
| | - Presentación Carrillo
- Instituto Universitario de Investigación del Agua, C/Ramón y Cajal, n 4, 18071 Granada, Spain
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González-Olalla JM, Medina-Sánchez JM, Carrillo P. Fluctuation at High Temperature Combined with Nutrients Alters the Thermal Dependence of Phytoplankton. Microb Ecol 2022; 83:555-567. [PMID: 34145482 DOI: 10.1007/s00248-021-01787-8] [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] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 06/01/2021] [Indexed: 06/12/2023]
Abstract
The Metabolic Theory of Ecology (MTE) predicts that the temperature increases exert a common effect on organisms stimulating metabolic rates, this being stronger for a heterotrophic than for an autotrophic metabolism. However, no available studies within the MTE framework have focused on organisms' response under fluctuation at high temperature interacting with factors such as nutrient availability, or how this interaction could affect the coexistence between mixotrophic and strict autotrophic phytoplankton. Hence, we assess how the phytoplankton metabolism and species composition are affected under scenarios of high temperature and fluctuation at high temperature, and how nutrients alter the direction and magnitude of such impact. For that, we use a mixed culture composed of two phytoplankton species: a strict autotrophic species and a mixotrophic species. Our results indicate that, in agreement with the MTE, only fluctuation at high temperature treatment registered a greater activation energy (Ea) value for respiration than for primary production and stimulated mixotrophic over strict autotrophic species abundance compared to control treatment. Remarkably, fluctuation at high temperature had a strong negative impact on the total abundance of the mixed-culture. The interaction between nutrient enrichment and fluctuation at high temperature increased abundance of the strict autotrophic species and overall species abundance, and led to Ea values that were higher in primary production than in respiration. Changes in community composition, enhanced by nutrient enrichment, could be behind this response, which can have implications in ecosystem functioning in a changing world.
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Affiliation(s)
- Juan Manuel González-Olalla
- University Institute of Water Research, University of Granada, C/Ramón y Cajal, 4, 18071, Granada, Spain
- Department of Ecology, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
| | - Juan Manuel Medina-Sánchez
- Department of Ecology, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain.
| | - Presentación Carrillo
- University Institute of Water Research, University of Granada, C/Ramón y Cajal, 4, 18071, Granada, Spain
- Department of Ecology, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
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González-Olalla JM, Medina-Sánchez JM, Norici A, Carrillo P. Regulation of Phagotrophy by Prey, Low Nutrients, and Low Light in the Mixotrophic Haptophyte Isochrysis galbana. Microb Ecol 2021; 82:981-993. [PMID: 33661311 DOI: 10.1007/s00248-021-01723-w] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 02/16/2021] [Indexed: 06/12/2023]
Abstract
Mixotrophy combines autotrophy and phagotrophy in the same cell. However, it is not known to what extent the phagotrophy influences metabolism, cell composition, and growth. In this work, we assess, on the one hand (first test), the role of phagotrophy on the elemental and biochemical composition, cell metabolism, and enzymes related to C, N, and S metabolism of Isochrysis galbana Parke, 1949. On the other hand, we study how a predicted increase of phagotrophy under environmental conditions of low nutrients (second test) and low light (third test) can affect its metabolism and growth. Our results for the first test revealed that bacterivory increased the phosphorous and iron content per cell, accelerating cell division and improving the cell fitness; in addition, the stimulation of some C and N enzymatic routes help to maintain, to some degree, compositional homeostasis. Under nutrient or light scarcity, I. galbana grew more slowly despite greater bacterial consumption, and the activities of key enzymes involved in C, N, and S metabolism changed according to a predominantly phototrophic strategy of nutrition in this alga. Contrary to recent studies, the stimulation of phagotrophy under low nutrient and low irradiance did not imply greater and more efficient C flux.
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Affiliation(s)
- Juan Manuel González-Olalla
- Laboratory of Algal and Plant Physiology, Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, via Brecce Bianche, 60131, Ancona, Italy.
- University Institute of Water research, University of Granada, C/Ramón y Cajal, 4, 18071, Granada, Spain.
| | - Juan Manuel Medina-Sánchez
- University Institute of Water research, University of Granada, C/Ramón y Cajal, 4, 18071, Granada, Spain
- Department of Ecology, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
| | - Alessandra Norici
- Laboratory of Algal and Plant Physiology, Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, via Brecce Bianche, 60131, Ancona, Italy
| | - Presentación Carrillo
- University Institute of Water research, University of Granada, C/Ramón y Cajal, 4, 18071, Granada, Spain
- Department of Ecology, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
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Boutet ML, Eixarch E, Droguett PA, Crovetto F, Peralta S, Carrillo P, Guimerà M, Manau D, Gratacós E, Crispi F, Casals G. Abstracts of the 31st World Congress on Ultrasound in Obstetrics and Gynecology, 15-17 October 2021, Virtual. Ultrasound Obstet Gynecol 2021; 58 Suppl 1:1-312. [PMID: 34647656 DOI: 10.1002/uog.23767] [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] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- M L Boutet
- BCNatal Fetal Medicine Research Center (Hospital Clínic and Hospital Sant Joan de Déu), Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - E Eixarch
- BCNatal Fetal Medicine Research Center (Hospital Clínic and Hospital Sant Joan de Déu), Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
- Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona, Spain
| | - P Ahumada Droguett
- BCNatal Fetal Medicine Research Center (Hospital Clínic and Hospital Sant Joan de Déu), Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - F Crovetto
- BCNatal Fetal Medicine Research Center (Hospital Clínic and Hospital Sant Joan de Déu), Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
- Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona, Spain
| | - S Peralta
- Assisted Reproduction Unit, Hospital Clínic of Barcelona, (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - P Carrillo
- Assisted Reproduction Unit, Hospital Clínic of Barcelona, (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - M Guimerà
- Assisted Reproduction Unit, Hospital Clínic of Barcelona, (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - D Manau
- Assisted Reproduction Unit, Hospital Clínic of Barcelona, (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - E Gratacós
- BCNatal Fetal Medicine Research Center (Hospital Clínic and Hospital Sant Joan de Déu), Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
- Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona, Spain
| | - F Crispi
- BCNatal Fetal Medicine Research Center (Hospital Clínic and Hospital Sant Joan de Déu), Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
- Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona, Spain
| | - G Casals
- Assisted Reproduction Unit, Hospital Clínic of Barcelona, (IDIBAPS), University of Barcelona, Barcelona, Spain
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Lares-Michel M, Housni FE, Aguilera Cervantes VG, Carrillo P, Michel Nava RM, Llanes Cañedo C. Eat Well to Fight Obesity… and Save Water: The Water Footprint of Different Diets and Caloric Intake and Its Relationship With Adiposity. Front Nutr 2021; 8:694775. [PMID: 34277688 PMCID: PMC8281344 DOI: 10.3389/fnut.2021.694775] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 04/13/2021] [Accepted: 06/04/2021] [Indexed: 12/12/2022] Open
Abstract
Water scarcity and excess adiposity are two of the main problems worldwide and in Mexico, which is the most obese country in the world and suffers from water scarcity. Food production represents 90% of a person's water footprint (WF), and healthy diets can lead to less WF than do unhealthy diets related to obesity. We calculated the WF of the diet and caloric intake of adults in Mexico and analyzed its relationship with adiposity. Also, the risk of water expenditure due to adiposity and adherence to dietary recommendations regarding WF of international healthy diets were examined. A Food Consumption Frequency Questionnaire (FCFQ) was applied to 395 adults. Body mass index (BMI), associated with adiposity indicators, was used as a reference for grouping a sample into adiposity levels. The WF was calculated according to the WF Assessment Method, considering correction factors and accounting for water involved in cooking and food washing. Our results showed that the Mexican diet spends 6,056 liters per person per day (L p-1d-1) and is 55% higher than international healthy diets WF. Consumption of beef, milk, fruits, chicken, and fatty cereals represented 56% of total WF. Strong relations appeared between hypercaloric diets and high WF. Diets of people with excess adiposity generated statistically higher WF with extra expenses of 729 L p-1d-1 compared with the normal adiposity population. Following nutritional recommendations offers a protective factor in water care, whereas not adhering to these represents a risk up to 93 times greater of water expenditure regarding international healthy diets. Therefore, both for the general population and to regulate obesity, adequate diets can help mitigate the problem of water scarcity.
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Affiliation(s)
- Mariana Lares-Michel
- Instituto de Investigaciones en Comportamiento Alimentario y Nutrición (IICAN), University Center of the South, University of Guadalajara, Ciudad Guzmán, Mexico
| | - Fatima Ezzahra Housni
- Instituto de Investigaciones en Comportamiento Alimentario y Nutrición (IICAN), University Center of the South, University of Guadalajara, Ciudad Guzmán, Mexico
| | - Virginia Gabriela Aguilera Cervantes
- Instituto de Investigaciones en Comportamiento Alimentario y Nutrición (IICAN), University Center of the South, University of Guadalajara, Ciudad Guzmán, Mexico
| | - Presentación Carrillo
- Instituto Universitario de Investigación del Agua, Universidad de Granada, Granada, Spain
| | - Rosa María Michel Nava
- Departamento de Sistemas y Computación, Tecnológico Nacional de México, Campus Ciudad Guzmán, Ciudad Guzmán, Mexico
| | - Claudia Llanes Cañedo
- Instituto de Investigaciones en Comportamiento Alimentario y Nutrición (IICAN), University Center of the South, University of Guadalajara, Ciudad Guzmán, Mexico
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Durán-Romero C, Medina-Sánchez JM, Carrillo P. Uncoupled phytoplankton-bacterioplankton relationship by multiple drivers interacting at different temporal scales in a high-mountain Mediterranean lake. Sci Rep 2020; 10:350. [PMID: 31941977 PMCID: PMC6962384 DOI: 10.1038/s41598-019-57269-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 12/19/2019] [Indexed: 01/22/2023] Open
Abstract
Global-change stressors act under different timing, implying complexity and uncertainty in the study of interactive effects of multiple factors on planktonic communities. We manipulated three types of stressors acting in different time frames in an in situ experiment: ultraviolet radiation (UVR); phosphorus (P) concentration; temperature (T) in an oligotrophic Mediterranean high-mountain lake. The aim was to examine how the sensitivity of phytoplankton and bacterioplankton to UVR and their trophic relationship change under nutrient acclimation and abrupt temperature shifts. Phytoplankton and bacteria showed a common pattern of metabolic response to UVR × P addition interaction, with an increase in their production rates, although evidencing an inhibitory UVR effect on primary production (PP) but stimulatory on bacterial production (HBP). An abrupt T shift in plankton acclimated to UVR and P addition decreased the values of PP, evidencing an inhibitory UVR effect, whereas warming increased HBP and eliminated the UVR effect. The weakening of commensalistic and predatory relationship between phyto- and bacterioplankton under all experimental conditions denotes the negative effects of present and future global-change conditions on planktonic food webs towards impairing C flux within the microbial loop.
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Cabrerizo MJ, Medina-Sánchez JM, Villar-Argaiz M, Carrillo P. Interplay between resistance and resilience governs the stability of a freshwater microbial food web under multiple stressors. Sci Total Environ 2019; 691:908-918. [PMID: 31326814 DOI: 10.1016/j.scitotenv.2019.07.173] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 07/09/2019] [Accepted: 07/11/2019] [Indexed: 06/10/2023]
Abstract
Energy (photosynthetically active [PAR] and ultraviolet [UVR] radiation) and matter (organic and inorganic nutrients) fluxes regulate the ecosystem's stability. However, the mechanisms underpinning the potential interplay between resistance and resilience to shifts in nutrient inputs and UVR are poorly understood. To assess how the UVR × nutrients interaction alters ecosystem stability, we exposed in situ a microbial food web from an oligotrophic ecosystem to: (1) two light (UVR + PAR and PAR), and (2) four nutrient (ambient concentrations, phosphorus [P], carbon [C] and C × P addition) treatments for three weeks. During this period, we quantified the community composition and biomass, sestonic P and C:P ratio, primary [PP] and bacterial [BP] production, community [CR] and bacterial [BR] respiration, excreted organic carbon [EOC], as well as the commensalistic phytoplankton-bacteria interaction (i.e. bacterial carbon demand [BCD]:EOC ratio) and the metabolic balance of the ecosystem (i.e. [PP:R] ratio). The stability of all response variables under the four environmental scenarios tested (i.e. UVR, UVR × C, UVR × P, and UVR × C × P) was quantified by means of the resistance and resilience indexes. The microbial community was dominated by phototrophs during the experimental period regardless of the treatment considered. The most complex scenario, i.e. UVR × C × P, decreased the resistance for all variables, except for BR and the PP:R ratio. Despite that PP:R ratio showed the highest resistance under such scenario, it was >1 in all environmental scenarios (i.e. net autotrophic), except under the UVR × C interaction, where, concomitant with increased resilience, the balance shifted towards net heterotrophy (PP:R < 1). Under the UVR × C × P scenario, the metabolic balance of the ecosystem proved strongly resistant due mainly to high resistance of bacterial respiration and a firm stability of the commensalistic interaction. Our results evidence that the high resilience of phototrophs (favoring their predominance over mixo- and heterotrophs) may lead to the maintenance of the autotrophic nature and carbon (C) sink capacity of the ecosystem.
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Affiliation(s)
- Marco J Cabrerizo
- Departamento de Ecología y Biología Animal, Facultad de Ciencias del Mar, Campus Lagoas Marcosende s/n, 36310 Vigo, Spain; Instituto Universitario de Investigación del Agua, Universidad de Granada, C/ Ramón y Cajal, 4, 18071 Granada, Spain.
| | - Juan Manuel Medina-Sánchez
- Instituto Universitario de Investigación del Agua, Universidad de Granada, C/ Ramón y Cajal, 4, 18071 Granada, Spain.
| | - Manuel Villar-Argaiz
- Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva s/n, 18071 Granada, Spain.
| | - Presentación Carrillo
- Instituto Universitario de Investigación del Agua, Universidad de Granada, C/ Ramón y Cajal, 4, 18071 Granada, Spain.
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12
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González-Olalla JM, Medina-Sánchez JM, Carrillo P. Mixotrophic trade-off under warming and UVR in a marine and a freshwater alga. J Phycol 2019; 55:1028-1040. [PMID: 31001833 DOI: 10.1111/jpy.12865] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Accepted: 03/15/2019] [Indexed: 06/09/2023]
Abstract
Mixotrophic protists combine phagotrophy and phototrophy within a single cell. Greater phagotrophic activity could reinforce the bypass of carbon (C) flux through the bacteria-mixotroph link and thus lead to a more efficient transfer of C and other nutrients to the top of the trophic web. Determining how foreseeable changes in temperature and UVR affect mixotrophic trade-offs in favor of one or the other nutritional strategy, along the mixotrophic gradient, is key to understanding the fate of carbon and mineral nutrients in the aquatic ecosystem. Our two main hypotheses were: (i) that increased warming and UVR will divert metabolism toward phagotrophy, and (ii) that the magnitude of this shift will vary according to the organism's position along the mixotrophic gradient. To test these hypotheses, we used two protists (Isochrysis galbana and Chromulina sp.) located in different positions on the mixotrophic gradient, subjecting them to the action of temperature and of UVR and their interaction. Our results showed that the joint action of these two factors increased the primary production:bacterivory ratio and stoichiometric values (N:P ratio) close to Redfield's ratio. Therefore, temperature and UVR shifted the metabolism of both organisms toward greater phototrophy regardless of the original position of the organism on the mixotrophic gradient. Weaker phagotrophic activity could cause a less efficient transfer of C to the top of trophic webs.
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Affiliation(s)
- Juan Manuel González-Olalla
- University Institute of Water Research, University of Granada, C/Ramón y Cajal, 4, Granada, 18071, Spain
- Department of Ecology, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, Granada, 18071, Spain
| | - Juan Manuel Medina-Sánchez
- University Institute of Water Research, University of Granada, C/Ramón y Cajal, 4, Granada, 18071, Spain
- Department of Ecology, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, Granada, 18071, Spain
| | - Presentación Carrillo
- University Institute of Water Research, University of Granada, C/Ramón y Cajal, 4, Granada, 18071, Spain
- Department of Ecology, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, Granada, 18071, Spain
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Cabrerizo MJ, González-Olalla JM, Hinojosa-López VJ, Peralta-Cornejo FJ, Carrillo P. A shifting balance: responses of mixotrophic marine algae to cooling and warming under UVR. New Phytol 2019; 221:1317-1327. [PMID: 30306559 DOI: 10.1111/nph.15470] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 09/03/2018] [Indexed: 06/08/2023]
Abstract
Mixotrophy is a dominant metabolic strategy in ecosystems worldwide. Shifts in temperature (T) and light (i.e. the ultraviolet portion of spectrum (UVR)) are key abiotic factors that modulate the conditions under which an organism is able to live. However, whether the interaction between both drivers alters mixotrophy in a global-change context remains unassessed. To determine the T × UVR effects on relative electron transport rates, nonphotochemical quenching, bacterivory, and bacterial production, we conducted an experiment with Isochrysis galbana populations grown mixotrophically, which were exposed to 5°C of cooling and warming with respect to the control (19°C) with (or without) UVR over light-dark cycles and different timescales. At the beginning of the experiment, cooling inhibited the relative electron transport and bacterivory rates, whereas warming depressed only bacterivory regardless of the radiation treatment. By the end of the experiment, warming and UVR conditions stimulated bacterivory. These reduced relative electron transport rates (c. 50% (warming) and > 70% (cooling)) were offset by increased (35%) cumulative bacterivory rates under warming and UVR conditions. We propose that mixotrophy constitutes an energy-saving and a compensatory mechanism to gain carbon (C) when photosynthesis is impaired, and highlight the need to consider the natural environmental changes affecting the populations when we test the impacts of interacting global-change drivers.
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Affiliation(s)
- Marco J Cabrerizo
- Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva s/n, Granada, 18071, España
- Instituto Universitario de Investigación del Agua, Universidad de Granada, C/Ramón y Cajal, 4, Granada, 18071, España
| | - Juan Manuel González-Olalla
- Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva s/n, Granada, 18071, España
- Instituto Universitario de Investigación del Agua, Universidad de Granada, C/Ramón y Cajal, 4, Granada, 18071, España
| | - Víctor J Hinojosa-López
- Instituto Universitario de Investigación del Agua, Universidad de Granada, C/Ramón y Cajal, 4, Granada, 18071, España
| | - Francisco J Peralta-Cornejo
- Instituto Universitario de Investigación del Agua, Universidad de Granada, C/Ramón y Cajal, 4, Granada, 18071, España
| | - Presentación Carrillo
- Instituto Universitario de Investigación del Agua, Universidad de Granada, C/Ramón y Cajal, 4, Granada, 18071, España
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Carrasco-García AA, Camacho MA, Pacheco P, Carrillo P, Coria-Avila GA, Paredes-Ramos P. Artificial vagino-cervical stimulation modifies the frequency of uterine contractions during the estrous cycle of the female rat. EB 2019. [DOI: 10.25009/eb.v10i25.2566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Las contracciones uterinas (CU) pueden participar en importantes procesos reproductivos, como el transporte de espermatozoides y el parto. La evidencia indica que las CU pueden ser inducidas por hormonas y estimulación vaginocervical (EVC) a través de vías neuroendocrinas, incluida la actividad de las glándulas pituitaria y ovarios. Evaluamos la frecuencia de CU después de la EVC en diferentes fases del ciclo estral (CE) en ratas hembras adultas. Treinta y seis ratas hembras fueron anestesiadas, y sus cuernos uterinos fueron expuestos a través de una incisión abdominal. La EVC incluyó intromisiones vaginocervicales (IVC) y distensión vaginal mediante la inserción de un tapón de silicón para imitar los efectos del tapón posteyaculatorio. El número de CU se midió: 1) antes y después de las IVC, 2) durante la distensión vaginal por el tapón de silicón, y después de que se retiró. Comparamos el efecto de la EVC en la cantidad de CU durante las diferentes etapas de la CE de ratas. Los resultados indicaron que la frecuencia de la CU basal fue mayor durante el proestro tardío y menor durante el diestro. Además, las intromisiones dieron como resultado una mayor actividad uterina. La EVC aumentó el número de contracciones durante todas las fases de la CE, excepto durante el diestro. Discutimos el papel de las hormonas y la estimulación sexual en la CU, y su posible implicación en los procesos reproductivos de las hembras.
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Villar-Argaiz M, Cabrerizo MJ, González-Olalla JM, Valiñas MS, Rajic S, Carrillo P. Growth impacts of Saharan dust, mineral nutrients, and CO 2 on a planktonic herbivore in southern Mediterranean lakes. Sci Total Environ 2018; 639:118-128. [PMID: 29778677 DOI: 10.1016/j.scitotenv.2018.05.041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 04/02/2018] [Accepted: 05/04/2018] [Indexed: 06/08/2023]
Abstract
Rising levels of CO2 can boost plant biomass but reduce its quality as a food source for herbivores. However, significant uncertainties remain as to the degree to which the effect is modulated by other environmental factors and the underlying processes causing these responses in nature. To address these questions, we carried out CO2-manipulation experiments using natural seston from three lakes under nutrient-enriched conditions (mimicking eutrophication and atmospheric dust-input processes) as a food source for the planktonic Daphnia pulicaria. Contrary to expectations, there were no single effects of rising CO2 on herbivorous growth. Instead, synergistic CO2 × nutrient interactions indicated that CO2 did not support higher zooplankton growth rates unless supplemented with dust or inorganic nutrients (nitrogen, N; phosphorus, P) in two of three studied lakes. The overall positive correlation between zooplankton growth and seston carbon (C), but not seston C:P, suggested that this was a food quantity-mediated response. In addition, we found that this correlation improved when the data were grouped according to the nutrient treatments, and that the response was largest for dust. The synergistic CO2 × nutrient effects reported here imply that the effects of rising CO2 levels on herbivorous growth may be strongly influenced by eutrophication processes and the increase in dust deposition predicted for the Mediterranean region.
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Affiliation(s)
- Manuel Villar-Argaiz
- Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain.
| | | | | | - Macarena S Valiñas
- Estación de Fotobiología Playa Unión and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Casilla de Correos no. 15, 9103 Rawson, Chubut, Argentina.
| | - Sanja Rajic
- Instituto del Agua, Universidad de Granada, 18071 Granada, Spain
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16
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González-Olalla JM, Medina-Sánchez JM, Lozano IL, Villar-Argaiz M, Carrillo P. Climate-driven shifts in algal-bacterial interaction of high-mountain lakes in two years spanning a decade. Sci Rep 2018; 8:10278. [PMID: 29980756 PMCID: PMC6035198 DOI: 10.1038/s41598-018-28543-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 06/22/2018] [Indexed: 01/02/2023] Open
Abstract
Algal-bacterial interactions include mutualism, commensalism, and predation. However, how multiple environmental conditions that regulate the strength and prevalence of a given interaction remains unclear. Here, we test the hypothesis that the prevailing algal-bacterial interaction shifted in two years (2005 versus 2015), due to increased temperature (T) and Saharan dust depositions in high-mountain lakes of Sierra Nevada (S Spain). Our results support the starting hypothesis that the nature of the prevailing algal-bacterial interaction shifted from a bacterivory control exerted by algae to commensalism, coinciding with a higher air and water T as well as the lower ratio sestonic nitrogen (N): phosphorous (P), related to greater aerosol inputs. Projected global change conditions in Mediterranean region could decline the functional diversity and alter the role of mixotrophy as a carbon (C) by-pass in the microbial food web, reducing the biomass-transfer efficiency up the web by increasing the number of trophic links.
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Affiliation(s)
| | | | - Ismael L Lozano
- Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, 18071, Granada, Spain
| | - Manuel Villar-Argaiz
- Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, 18071, Granada, Spain
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17
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Martinez E, Gónzalez del Alba A, Asensio V, Carrillo P, Garcías C, Azkárate A, Prada L, Terrasa J, Alemany R, Obrador-Hevia A. PO-326 Impact of miR-205–5 p and miR-425–5 p on Wnt and AR signalling pathways in castration resistant prostate cancertransition. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.356] [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: 11/03/2022] Open
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18
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Villar-Argaiz M, Medina-Sánchez JM, Biddanda BA, Carrillo P. Predominant Non-additive Effects of Multiple Stressors on Autotroph C:N:P Ratios Propagate in Freshwater and Marine Food Webs. Front Microbiol 2018; 9:69. [PMID: 29441051 PMCID: PMC5797581 DOI: 10.3389/fmicb.2018.00069] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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: 03/06/2017] [Accepted: 01/11/2018] [Indexed: 01/19/2023] Open
Abstract
A continuing challenge for scientists is to understand how multiple interactive stressor factors affect biological interactions, and subsequently, ecosystems–in ways not easily predicted by single factor studies. In this review, we have compiled and analyzed available research on how multiple stressor pairs composed of temperature (T), light (L), ultraviolet radiation (UVR), nutrients (Nut), carbon dioxide (CO2), dissolved organic carbon (DOC), and salinity (S) impact the stoichiometry of autotrophs which in turn shapes the nature of their ecological interactions within lower trophic levels in streams, lakes and oceans. Our analysis from 66 studies with 320 observations of 11 stressor pairs, demonstrated that non-additive responses predominate across aquatic ecosystems and their net interactive effect depends on the stressor pair at play. Across systems, there was a prevalence of antagonism in freshwater (60–67% vs. 47% in marine systems) compared to marine systems where synergism was more common (49% vs. 33–40% in freshwaters). While the lack of data impeded comparisons among all of the paired stressors, we found pronounced system differences for the L × Nut interactions. For this interaction, our data for C:P and N:P is consistent with the initial hypothesis that the interaction was primarily synergistic in the oceans, but not for C:N. Our study found a wide range of variability in the net effects of the interactions in freshwater systems, with some observations supporting antagonism, and others synergism. Our results suggest that the nature of the stressor pairs interactions on C:N:P ratios regulates the “continuum” commensalistic-competitive-predatory relationship between algae and bacteria and the food chain efficiency at the algae-herbivore interface. Overall, the scarce number of studies with even more fewer replications in each study that are available for freshwater systems have prevented a more detailed, insightful analysis. Our findings highlighting the preponderance of antagonistic and synergistic effects of stressor interactions in aquatic ecosystems—effects that play key roles in the functioning of feedback loops in the biosphere—also stress the need for further studies evaluating the interactive effects of multiple stressors in a rapidly changing world facing a confluence of tipping points.
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Affiliation(s)
- Manuel Villar-Argaiz
- Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, Granada, Spain
| | - Juan M Medina-Sánchez
- Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, Granada, Spain
| | - Bopaiah A Biddanda
- Annis Water Resources Institute, Grand Valley State University, Muskegon, MI, United States
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Tecamachaltzi-Silvaran MB, Barradas-Moctezuma M, Herrera-Covarrubias D, Carrillo P, Corona-Morales AA, Perez CA, García LI, Manzo J, Coria-Avila GA. Olfactory conditioned same-sex partner preference in female rats: Role of ovarian hormones. Horm Behav 2017; 96:13-20. [PMID: 28867385 DOI: 10.1016/j.yhbeh.2017.08.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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] [Received: 06/02/2017] [Revised: 07/09/2017] [Accepted: 08/29/2017] [Indexed: 11/22/2022]
Abstract
The dopamine D2-type receptor agonist quinpirole (QNP) facilitates the development of conditioned same-sex partner preference in males during cohabitation, but not in ovariectomized (OVX) females, primed with estradiol benzoate (EB) and progesterone (P). Herein we tested the effects of QNP on OVX, EB-only primed females. Females received a systemic injection (every four days) of either saline (Saline-conditioned) or QNP (QNP-conditioned) and then cohabited for 24h with lemon-scented stimulus females (CS+), during three trials. In test 1 (female-female) preference was QNP-free, and females chose between the CS+ female and a novel female. In test 2 (male-female) they chose between the CS+ female and a sexually experienced male. In test 1 Saline-conditioned females displayed more hops & darts towards the novel female, but QNP-conditioned females displayed more sexual solicitations towards the CS+ female. In test 2 Saline-conditioned females displayed a clear preference for the male, whereas QNP-conditioned females displayed what we considered a bisexual preference. We discuss the effect of dopamine and ovarian hormones on the development of olfactory conditioned same-sex preference in females.
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Affiliation(s)
| | | | | | - P Carrillo
- Instituto de Neuroetología, Universidad Veracruzana, Mexico
| | | | - C A Perez
- Centro de Investigaciones Cerebrales, Universidad Veracruzana, Mexico
| | - L I García
- Centro de Investigaciones Cerebrales, Universidad Veracruzana, Mexico
| | - J Manzo
- Centro de Investigaciones Cerebrales, Universidad Veracruzana, Mexico
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Castellano-Hinojosa A, Correa-Galeote D, Carrillo P, Bedmar EJ, Medina-Sánchez JM. Denitrification and Biodiversity of Denitrifiers in a High-Mountain Mediterranean Lake. Front Microbiol 2017; 8:1911. [PMID: 29056928 PMCID: PMC5635049 DOI: 10.3389/fmicb.2017.01911] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 04/07/2017] [Accepted: 09/19/2017] [Indexed: 11/13/2022] Open
Abstract
Wet deposition of reactive nitrogen (Nr) species is considered a main factor contributing to N inputs, of which nitrate ([Formula: see text]) is usually the major component in high-mountain lakes. The microbial group of denitrifiers are largely responsible for reduction of nitrate to molecular dinitrogen (N2) in terrestrial and aquatic ecosystems, but the role of denitrification in removal of contaminant nitrates in high-mountain lakes is not well understood. We have used the oligotrophic, high-altitude La Caldera lake in the Sierra Nevada range (Spain) as a model to study the role of denitrification in nitrate removal. Dissolved inorganic Nr concentration in the water column of la Caldera, mainly nitrate, decreased over the ice-free season which was not associated with growth of microbial plankton or variations in the ultraviolet radiation. Denitrification activity, estimated as nitrous oxide (N2O) production, was measured in the water column and in sediments of the lake, and had maximal values in the month of August. Relative abundance of denitrifying bacteria in sediments was studied by quantitative polymerase chain reaction of the 16S rRNA and the two phylogenetically distinct clades nosZI and nosZII genes encoding nitrous oxide reductases. Diversity of denitrifiers in sediments was assessed using a culture-dependent approach and after the construction of clone libraries employing the nosZI gene as a molecular marker. In addition to genera Polymorphum, Paracoccus, Azospirillum, Pseudomonas, Hyphomicrobium, Thauera, and Methylophaga, which were present in the clone libraries, Arthrobacter, Burkholderia, and Rhizobium were also detected in culture media that were not found in the clone libraries. Analysis of biological activities involved in the C, N, P, and S cycles from sediments revealed that nitrate was not a limiting nutrient in the lake, allowed N2O production and determined denitrifiers' community structure. All these results indicate that denitrification could be a major biochemical process responsible for the N losses that occur in La Caldera lake.
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Affiliation(s)
- Antonio Castellano-Hinojosa
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain.,Instituto Universitario de Investigación del Agua, Universidad de Granada, Granada, Spain
| | - David Correa-Galeote
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain
| | - Presentación Carrillo
- Instituto Universitario de Investigación del Agua, Universidad de Granada, Granada, Spain.,Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, Granada, Spain
| | - Eulogio J Bedmar
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain
| | - Juan M Medina-Sánchez
- Instituto Universitario de Investigación del Agua, Universidad de Granada, Granada, Spain.,Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, Granada, Spain
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Cordero A, Garcia-Acuna J, Cid B, Rodriguez-Manero M, Lopez-Palop R, Carrillo P, Trillo R, Bertomeu-Martinez V, Gonzalez-Juanatey J. P3302Radial approach reduces hospital mortality in acute coronary syndrome: a propensity score matched study. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3302] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Gunturiz-Beltran C, Lopez Palop R, Carrillo P, Cordero A, Frutos A, Garcia-Carrilero M, Juskova M, Ribes F, Alcantara N, Yepez F. P1397Elderly patients suffer a greater delay in reperfusion by primary percutaneous coronary intervention, mainly due to longer delay until health system contact. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1397] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Cordero A, Lopez-Palop R, Moreno-Arribas J, Yepez F, Ribes F, Juskova M, Gunturiz C, Carrillo P, Bertomeu-Gonzalez V, Garcia-Carrilero M, Marco A, Sanchez A, Bertomeu-Martinez V. P1514Predictive value of the INTERHEART-cholesterol score for long-term prognosis of patients with acute coronary syndrome. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1514] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Cordero A, Garcia-Acuna J, Rodriguez-Manero M, Lopez-Palop R, Cid B, Carrillo P, Agra R, Bertomeu-Martinez V, Gonzalez-Juanatey J. P2727Progressive decline in hospital mortality of acute coronary syndrome is mainly driven survival improvement in high-risk patients. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2727] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cordero A, Lopez-Palop R, Carrillo P, Frutos A, Garcia R, Ribes F, Yepes F, Juskova M, Garcia-Carrilero M, Gunturiz C, Bertomeu-Martinez V. P6078Antiplatelet pre-treatment before emergent revascularization is a major determinant of successful manual thrombectomy. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p6078] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Martinez A, Agra Bermejo R, Cordero A, Garcia Acuna J, Alvarez Rodriguez L, Abou-Jokh Casas C, Gomez Otero I, Rodriguez Manero M, Varela Roman A, Cid Alvarez B, Lopez Palop R, Carrillo P, Gonzalez Juanatey J. P3706Prognosis value of new ESC LVEF classification in acute coronary syndrome with and without heart failure. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3706] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cordero A, Lopez-Palop R, Carrillo P, Ribes F, Marco A, Sanchez A, Juskova M, Yepes F, Alcantara N, Moreno-Arribas J, Quiles J, Bertomeu-Martinez V. P6458Prevalent and incident malignancies in patients admitted for an acute coronary syndrome. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p6458] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cordero A, Lopez-Palop R, Carrillo P, Gunturiz C, Garcia-Carrilero M, Juskova M, Ribes F, Marco A, Sanchez A, Yepez F, Quiles J, Bertomeu-Martinez V. P6448Baseline, new onset and maintained anaemia prognostic value in patients with acute coronary syndrome. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p6448] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Lopez-Pineda A, Cordero A, Carratala-Munuera C, Orozco-Beltran D, Bertomeu-Gonzalez V, Quesada J, Gil-Guillen V, Frutos A, Lopez-Palop R, Carrillo P, Bertomeu-Martinez V. P1085Serum hyperuricemia determination improves risk prediction of GRACE score in people with acute coronary syndrome. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1085] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cabrerizo MJ, Carrillo P, Villafañe VE, Helbling EW. Differential impacts of global change variables on coastal South Atlantic phytoplankton: Role of seasonal variations. Mar Environ Res 2017; 125:63-72. [PMID: 28187324 DOI: 10.1016/j.marenvres.2017.01.005] [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] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 12/21/2016] [Accepted: 01/22/2017] [Indexed: 06/06/2023]
Abstract
Global change is associated to the increase in temperature (T), nutrient inputs (Nut) and solar radiation in the water column. To address their joint impact on the net community production [NCP], respiration [CR] and PSII performance (ΦPSII) of coastal phytoplankton communities from the South Atlantic Ocean over a seasonal succession, we performed a factorial design. For this, we used a 2 × 2 × 2 matrix set-up, with and without UVR, ambient and enriched nutrients, and in situ T and in situ T + 3 °C. The future scenario of global change exerted a dual impact, from an enhancement of NCP and ΦPSII during the pre-bloom to an inhibition of both processes towards the bloom period, when the in situ T and irradiances were lower and the community was dominated by diatoms. The increased inhibition of NCP and ΦPSII during the most productive stage of the annual succession could produce significant alterations of the CO2-sink capacity of coastal areas in the future.
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Affiliation(s)
- Marco J Cabrerizo
- Estación de Fotobiología Playa Unión, Casilla de Correos 15, 9103, Rawson, Chubut, Argentina; Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva s/n, 18071, Granada, Spain.
| | - Presentación Carrillo
- Instituto Universitario de Investigación del Agua, Universidad de Granada, C/ Ramón y Cajal, 4, 18071, Granada, Spain.
| | - Virginia E Villafañe
- Estación de Fotobiología Playa Unión, Casilla de Correos 15, 9103, Rawson, Chubut, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
| | - E Walter Helbling
- Estación de Fotobiología Playa Unión, Casilla de Correos 15, 9103, Rawson, Chubut, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
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Premaratne M, Yip B, Sefhore O, Sriamareswaran R, Yeap A, Lefkovits L, Carrillo P, Tong D, Layland J. Diabetes is an Independent Predictor of False Negative Stress Echocardiography. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.528] [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: 11/25/2022]
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Carrillo P, Medina-Sánchez JM, Herrera G, Durán C, Segovia M, Cortés D, Salles S, Korbee N, L. Figueroa F, Mercado JM. Interactive Effect of UVR and Phosphorus on the Coastal Phytoplankton Community of the Western Mediterranean Sea: Unravelling Eco-Physiological Mechanisms. PLoS One 2015; 10:e0142987. [PMID: 26599583 PMCID: PMC4658109 DOI: 10.1371/journal.pone.0142987] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 10/29/2015] [Indexed: 12/17/2022] Open
Abstract
Some of the most important effects of global change on coastal marine systems include increasing nutrient inputs and higher levels of ultraviolet radiation (UVR, 280-400 nm), which could affect primary producers, a key trophic link to the functioning of marine food webs. However, interactive effects of both factors on the phytoplankton community have not been assessed for the Mediterranean Sea. An in situ factorial experiment, with two levels of ultraviolet solar radiation (UVR+PAR vs. PAR) and nutrients (control vs. P-enriched), was performed to evaluate single and UVR×P effects on metabolic, enzymatic, stoichiometric and structural phytoplanktonic variables. While most phytoplankton variables were not affected by UVR, dissolved phosphatase (APAEX) and algal P content increased in the presence of UVR, which was interpreted as an acclimation mechanism of algae to oligotrophic marine waters. Synergistic UVR×P interactive effects were positive on photosynthetic variables (i.e., maximal electron transport rate, ETRmax), but negative on primary production and phytoplankton biomass because the pulse of P unmasked the inhibitory effect of UVR. This unmasking effect might be related to greater photodamage caused by an excess of electron flux after a P pulse (higher ETRmax) without an efficient release of carbon as the mechanism to dissipate the reducing power of photosynthetic electron transport.
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Affiliation(s)
- Presentación Carrillo
- Instituto del Agua, Universidad de Granada, Granada, Spain
- Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, Granada, Spain
| | - Juan M. Medina-Sánchez
- Instituto del Agua, Universidad de Granada, Granada, Spain
- Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, Granada, Spain
| | | | - Cristina Durán
- Instituto del Agua, Universidad de Granada, Granada, Spain
| | - María Segovia
- Departamento de Ecología, Facultad de Ciencias, Universidad de Málaga, Málaga, Spain
| | - Dolores Cortés
- Centro Oceanográfico de Málaga, Instituto Español de Oceanografía Fuengirola, Málaga, Spain
| | - Soluna Salles
- Centro Oceanográfico de Málaga, Instituto Español de Oceanografía Fuengirola, Málaga, Spain
| | - Nathalie Korbee
- Departamento de Ecología, Facultad de Ciencias, Universidad de Málaga, Málaga, Spain
| | - Félix L. Figueroa
- Departamento de Ecología, Facultad de Ciencias, Universidad de Málaga, Málaga, Spain
| | - Jesús M. Mercado
- Centro Oceanográfico de Málaga, Instituto Español de Oceanografía Fuengirola, Málaga, Spain
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López-Sáez MP, Carrillo P, Huertas AJ. Occupational asthma and dermatitis induced by eugenol in a cleaner. J Investig Allergol Clin Immunol 2015; 25:64-65. [PMID: 25898700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023] Open
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Zibek S, Hirth T, Rupp S, Carrillo P. Synthese von Mannosylerythritollipide von Pseudozyma-Spezies mit nachwachsenden Rohstoffen. CHEM-ING-TECH 2014. [DOI: 10.1002/cite.201450452] [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: 11/09/2022]
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Bullejos FJ, Carrillo P, Gorokhova E, Medina-Sánchez JM, Balseiro EG, Villar-Argaiz M. Shifts in food quality for herbivorous consumer growth: multiple golden means in the life history. Ecology 2014; 95:1272-84. [PMID: 25000759 DOI: 10.1890/13-0410.1] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Consumer growth can be affected by imbalances between the nutrient content of the consumer and its food resource. Although ontogenetic-driven changes in animal composition are well documented, their potential consequences for the organism's sensitivity to food quality constraints have remained elusive. Here we show that the potential growth response of the copepod Mixodiaptomus laciniatus (as %RNA and RNA:DNA ratio) to the natural gradient of seston carbon (C) : nutrient ratio is unimodal and stage specific. Solution of the equation given by the first derivative function provided the optimum C : nutrient ratio for maximum stage-specific growth, which increased during ontogeny. The peakedness of the function indicated that animal vulnerability to suboptimal food quality decreased as juveniles reached adulthood. Consistent with these results, a field experiment demonstrated that potential consumer growth responded to variations in seston C: phosphorus ratio, and that early life stages were particularly vulnerable to suboptimal food quality.
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Dorado-García I, Medina-Sánchez JM, Herrera G, Cabrerizo MJ, Carrillo P. Quantification of carbon and phosphorus co-limitation in bacterioplankton: new insights on an old topic. PLoS One 2014; 9:e99288. [PMID: 24918445 PMCID: PMC4053443 DOI: 10.1371/journal.pone.0099288] [Citation(s) in RCA: 16] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 05/13/2014] [Indexed: 11/30/2022] Open
Abstract
Because the nature of the main resource that limits bacterioplankton (e.g. organic carbon [C] or phosphorus [P]) has biogeochemical implications concerning organic C accumulation in freshwater ecosystems, empirical knowledge is needed concerning how bacteria respond to these two resources, available alone or together. We performed field experiments of resource manipulation (2×2 factorial design, with the addition of C, P, or both combined) in two Mediterranean freshwater ecosystems with contrasting trophic states (oligotrophy vs. eutrophy) and trophic natures (autotrophy vs. heterotrophy, measured as gross primary production:respiration ratio). Overall, the two resources synergistically co-limited bacterioplankton, i.e. the magnitude of the response of bacterial production and abundance to the two resources combined was higher than the additive response in both ecosystems. However, bacteria also responded positively to single P and C additions in the eutrophic ecosystem, but not to single C in the oligotrophic one, consistent with the value of the ratio between bacterial C demand and algal C supply. Accordingly, the trophic nature rather than the trophic state of the ecosystems proves to be a key feature determining the expected types of resource co-limitation of bacteria, as summarized in a proposed theoretical framework. The actual types of co-limitation shifted over time and partially deviated (a lesser degree of synergism) from the theoretical expectations, particularly in the eutrophic ecosystem. These deviations may be explained by extrinsic ecological forces to physiological limitations of bacteria, such as predation, whose role in our experiments is supported by the relationship between the dynamics of bacteria and bacterivores tested by SEMs (structural equation models). Our study, in line with the increasingly recognized role of freshwater ecosystems in the global C cycle, suggests that further attention should be focussed on the biotic interactions that modulate resource co-limitation of bacteria.
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Martínez-Sellés M, Gómez Doblas JJ, Carro Hevia A, García de la Villa B, Ferreira-González I, Alonso Tello A, Andión Ogando R, Ripoll Vera T, Arribas Jiménez A, Carrillo P, Rodríguez Pascual C, Casares i Romeva M, Borras X, Cornide L, López-Palop R. Prospective registry of symptomatic severe aortic stenosis in octogenarians: a need for intervention. J Intern Med 2014; 275:608-20. [PMID: 24320176 DOI: 10.1111/joim.12174] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To study the factors associated with choice of therapy and prognosis in octogenarians with severe symptomatic aortic stenosis (AS). STUDY DESIGN Prospective, observational, multicenter registry. Centralized follow-up included survival status and, if possible, mode of death and Katz index. SETTING Transnational registry in Spain. SUBJECTS We included 928 patients aged ≥80 years with severe symptomatic AS. INTERVENTIONS Aortic-valve replacement (AVR), transcatheter aortic-valve implantation (TAVI) or conservative therapy. MAIN OUTCOME MEASURES All-cause death. RESULTS Mean age was 84.2 ± 3.5 years, and only 49.0% were independent (Katz index A). The most frequent planned management was conservative therapy in 423 (46%) patients, followed by TAVI in 261 (28%) and AVR in 244 (26%). The main reason against recommending AVR in 684 patients was high surgical risk [322 (47.1%)], other medical motives [193 (28.2%)], patient refusal [134 (19.6%)] and family refusal in the case of incompetent patients [35 (5.1%)]. The mean time from treatment decision to AVR was 4.8 ± 4.6 months and to TAVI 2.1 ± 3.2 months, P < 0.001. During follow-up (11.2-38.9 months), 357 patients (38.5%) died. Survival rates at 6, 12, 18 and 24 months were 81.8%, 72.6%, 64.1% and 57.3%, respectively. Planned intervention, adjusted for multiple propensity score, was associated with lower mortality when compared with planned conservative treatment: TAVI Hazard ratio (HR) 0.68 (95% confidence interval [CI] 0.49-0.93; P = 0.016) and AVR HR 0.56 (95% CI 0.39-0.8; P = 0.002). CONCLUSION Octogenarians with symptomatic severe AS are frequently managed conservatively. Planned conservative management is associated with a poor prognosis.
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Affiliation(s)
- M Martínez-Sellés
- Servicio de Cardiología, Hospital General Universitario Gregorio Marañón y Universidad Europea de Madrid, Madrid, Spain
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Bullejos FJ, Carrillo P, Gorokhova E, Medina-Sánchez JM, Villar-Argaiz M. Nucleic acid content in crustacean zooplankton: bridging metabolic and stoichiometric predictions. PLoS One 2014; 9:e86493. [PMID: 24466118 PMCID: PMC3897710 DOI: 10.1371/journal.pone.0086493] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Accepted: 12/14/2013] [Indexed: 11/17/2022] Open
Abstract
Metabolic and stoichiometric theories of ecology have provided broad complementary principles to understand ecosystem processes across different levels of biological organization. We tested several of their cornerstone hypotheses by measuring the nucleic acid (NA) and phosphorus (P) content of crustacean zooplankton species in 22 high mountain lakes (Sierra Nevada and the Pyrenees mountains, Spain). The P-allocation hypothesis (PAH) proposes that the genome size is smaller in cladocerans than in copepods as a result of selection for fast growth towards P-allocation from DNA to RNA under P limitation. Consistent with the PAH, the RNA:DNA ratio was >8-fold higher in cladocerans than in copepods, although 'fast-growth' cladocerans did not always exhibit higher RNA and lower DNA contents in comparison to 'slow-growth' copepods. We also showed strong associations among growth rate, RNA, and total P content supporting the growth rate hypothesis, which predicts that fast-growing organisms have high P content because of the preferential allocation to P-rich ribosomal RNA. In addition, we found that ontogenetic variability in NA content of the copepod Mixodiaptomus laciniatus (intra- and interstage variability) was comparable to the interspecific variability across other zooplankton species. Further, according to the metabolic theory of ecology, temperature should enhance growth rate and hence RNA demands. RNA content in zooplankton was correlated with temperature, but the relationships were nutrient-dependent, with a positive correlation in nutrient-rich ecosystems and a negative one in those with scarce nutrients. Overall our results illustrate the mechanistic connections among organismal NA content, growth rate, nutrients and temperature, contributing to the conceptual unification of metabolic and stoichiometric theories.
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Affiliation(s)
| | | | - Elena Gorokhova
- Department of Applied Environmental Science, Stockholm University, Stockholm, Sweden
| | | | - Manuel Villar-Argaiz
- Department of Ecology, Faculty of Sciences, University of Granada, Granada, Spain
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Cordero A, Sirera D, Miralles B, Masia MD, Carrillo P, Bertomeu-Gonzalez V, Moreno-Arribas J, Lopez-Palop R, Bertomeu-Martinez V. The statins benefit in prognosis after an acute coronary syndrome is independent of baseline LDL-cholesterol levels. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht307.p690] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cordero A, Sirera D, Carrillo P, Lopez-Palop R, Bertomeu-Gonzalez V, Moreno-Arribas J, Miralles B, Masia MD, Bertomeu-Martinez V. Diagnostic and prognostic performance of the INTERHEART-cholesterol score in patients admitted for chest pain. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1554] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Domínguez O, Carrillo P, Giner M, Piquer M, Alvaro M, Jimenez-Feijoo R, Lozano J, Pascal M, Plaza A. Gad c 1 efficiency in the diagnosis of fish allergy in children. Clin Transl Allergy 2013. [PMCID: PMC3723504 DOI: 10.1186/2045-7022-3-s3-p54] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Consuegra-Sánchez L, López-Palop R, Cano P, Carrillo P, Picó F, Villegas M, Sanchis J, Kaski JC. Assessment of high on-treatment platelet reactivity in patients with ischemic heart disease: concordance between the Multiplate and VerifyNow assays. J Thromb Haemost 2013; 11:379-81. [PMID: 23253198 DOI: 10.1111/jth.12073] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Accepted: 11/12/2012] [Indexed: 11/29/2022]
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Korbee N, Carrillo P, Mata MT, Rosillo S, Medina-Sánchez JM, Figueroa FL. Effects of ultraviolet radiation and nutrients on the structure–function of phytoplankton in a high mountain lake. Photochem Photobiol Sci 2012; 11:1087-98. [DOI: 10.1039/c2pp05336e] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Martín-Santiago A, Bauzá A, del Pozo LJ, Carrillo P. [Abortive or minimal-growth hemangiomas. A review of 14 cases]. Actas Dermosifiliogr 2011; 103:246-50. [PMID: 22056260 DOI: 10.1016/j.ad.2011.03.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Revised: 03/08/2011] [Accepted: 03/14/2011] [Indexed: 11/16/2022] Open
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Medina-Sánchez JM, Carrillo P, Delgado-Molina JA, Bullejos FJ, Villar-Argaiz M. Patterns of resource limitation of bacteria along a trophic gradient in Mediterranean inland waters. FEMS Microbiol Ecol 2010; 74:554-65. [DOI: 10.1111/j.1574-6941.2010.00969.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Carrillo P, Villar-Argaiz M, Medina-Sánchez JM. Does microorganism stoichiometry predict microbial food web interactions after a phosphorus pulse? Microb Ecol 2008; 56:350-363. [PMID: 18165873 DOI: 10.1007/s00248-007-9353-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2006] [Revised: 11/23/2007] [Accepted: 11/29/2007] [Indexed: 05/25/2023]
Abstract
Knowledge of variations in microbial food web interactions resulting from atmospheric nutrient loads is crucial to improve our understanding of aquatic food web structure in pristine ecosystems. Three experiments mimicking atmospheric inputs at different nitrogen/phosphorus (N/P) ratios were performed in situ covering the seasonal biological succession of the pelagic zone in a high-mountain Spanish lake. In all experiments, abundance, biomass, algal cell biovolume, P-incorporation rates, P-cell quota, and N/P ratio of algae strongly responded to P-enrichment, whereas heterotrophic bacteria remained relatively unchanged. Ciliates were severely restricted when a strong algal exploitation of the available P (bloom growth or storage strategies) led to transient (mid-ice-free experiment) or chronic (late ice-free experiment) P-deficiencies in bacteria. In contrast, maximum development of ciliates was reached when bacteria remained P-rich (N/P < 20) and algae approached Redfield proportions (N/P approximately 16). Evidence of a higher P-incorporation rate supports the proposition that algae and bacteria shifted from a mainly commensalistic-mutualistic to a competitive relationship for the available P when bacterial P-deficiency increased, as reflected by their unbalanced N/P ratio (N/P > 20-24). Hence, the bacterial N/P ratio proved be a key factor to understand the algae-bacteria relationship and microbial food web development. This study not only demonstrates the interdependence of life history strategies, stoichiometric nutrient content, and growth but also supports the use of bacterial N/P thresholds for diagnosing ciliate development, a little-studied aspect worthy of further attention.
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Querques G, Forte R, Longo C, Carrillo P, Laculli C, Soubrane G, Delle Noci N. La micro-périmétrie dans la dégénérescence maculaire liée à l’âge. J Fr Ophtalmol 2008; 31:515-21. [DOI: 10.1016/s0181-5512(08)72469-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [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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Shelbourn MA, Bouchlaghem D, Anumba CJ, Carrillo P. Framework for effective collaborative working in construction. Proceedings of the Institution of Civil Engineers - Management, Procurement and Law 2007. [DOI: 10.1680/mpal.2007.160.4.149] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
The potential benefits of collaborative working in construction projects have yet to be fully realised in the sector. This is in part due to the misunderstanding of the use of the information and communication technologies (ICT) and tools associated with working collaboratively. There are, however, isolated pockets of experts that have realised that in order to fully embrace the potential of collaborative working in their businesses, the role of ICT has to be closely aligned with the people that use it, and should relate to the overall goals of the business. The aim of the Planning and Implementation of Effective Collaboration in Construction (PIECC) project is to develop a decision-making framework that enables organisations to fully integrate ICT and its associated people and business issues into their projects and individual businesses. This paper reports on the development processes used to develop the framework, and its evaluation and testing within the UK construction sector. The paper presents the different processes that should be followed to develop a joint collaboration strategy, and the results and implications of using the PIECC framework to manage collaborative working.
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Affiliation(s)
- M. A. Shelbourn
- School of Architecture, Design and the Built Environment, Nottingham Trent University UK
| | - D. Bouchlaghem
- Department of Civil and Building Engineering, Loughborough University UK
| | - C. J. Anumba
- Department of Architectural Engineering, The Pennsylvania State University, State College PA, USA
| | - P. Carrillo
- Department of Civil and Building Engineering, Loughborough University UK
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Talavera-Carbajal MR, Estañol-Vidal B, López-Lomelí MM, García-Ramos G, Corona V, Plascencia N, Domínguez JC, Facha-García MT, Valdivieso-Cárdenas GE, Carrillo P, Olivas E, Veláquez M. [Monitoring dermatomal somatosensory evoked potentials at the ERB point, the cervical spinal cord and the cerebral cortex in the diagnosis of cervical radiculopathy]. Rev Neurol 2003; 36:917-24. [PMID: 12766863] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
INTRODUCTION Recording at various levels of the somatosensory pathway is often used in somatosensory evoked potentials to mixed nerve stimulation (SEP), but not in dermatomal somatosensory evoked potentials (DSEP) in which only the cortical potential is usually recorded. The aim of our study was to compare the recordings of upper limb DSEP at Erb point, cervical cord, and subcortical and cortical levels with SEP recordings in healthy subjects and patients with cervical radiculopathy. PATIENTS AND METHODS 17 patients with clinical history, MRI and electromyography consistent with cervical radiculopathy and 17 healthy subjects were included. Median and ulnar nerves were stimulated at the wrist; and C6, C7 and C8 dermatomes at the 1st, 3rd and 5th fingers respectively. All the potentials obtained with SEP and DSEP were compared between controls and patients by t test for independent samples. We also used Pearson s correlation for height/latencies, weight/amplitude and age/peripheral nerve conduction velocity (PNCV). RESULTS DSEP potentials were of similar morphology of those observed in SEP but had longer latencies and smaller amplitudes. We found a positive correlation between height and latencies, and a negative association of weight with amplitude of peripheral potential, and age/PNCV. No difference between controls and the neurological intact segments of patients was found. 13 patient had DSEP altered while only 5 of them had altered SEP recorded. The most common finding was prolongation of the conduction time of the segment N9 N13 on DSEP recordings. CONCLUSION We found that it is possible to record and to identify all the potentials in DSEP as observed in the SEP. On cervical radiculopathy, DSEP with the present technique increase the sensitivity and give some additional and useful information regarding the extension and localization of the pathology. Besides, DSEP recording is a non invasive technique, non traumatic and well tolerated for our patients.
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Affiliation(s)
- M R Talavera-Carbajal
- Departamento de Neurología y Psiquiatría, Laboratorio de Neurofisiología Clínica, Instituto Nacional de Ciencias Médicas y de la Nutrición Salvador Zubirán, Tlalpan, México.
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Reveiz-Herault L, Cardona AF, Ospina EG, Carrillo P. [Effectiveness of flunarizine in the prophylaxis of migraine: a meta-analytical review of the literature]. Rev Neurol 2003; 36:907-12. [PMID: 12766861] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
BACKGROUND Migraine is a common and disabling health problem among young and middle aged adults. Flunarizine have been used as a prophylactic medication in its management for more than two decades. OBJECTIVE The aim of the study is to systematically review the evidence obtained from randomized controlled trials about the efficacy and security of flunarizine versus placebo for the prevention of migraine in adults. MATERIALS AND METHODS Electronic search were performed using the databases MEDLINE, EMBASE, Biosis, the Cochrane Library, Lilacs and others. Reference lists of retrieved studies, reviews and conference abstracts were used to found another articles. Additionally, the authors performed a handsearched in recognized journals related to migraine and neurological topics. Randomized, placebo controlled, double blind trials assessing the efficacy of flunarizine for preventing migraine were included. We evaluated the frequency of the attacks by comparing the mean frequency before and after the intervention for each group of treatment and then the two groups were compared. To evaluate the security of flunarizine we used included and excluded studies and open trials. RESULTS Nine studies were obtained but only four met the inclusion criteria. The fixed effects model reported a reduction in the frequency of attacks by using flunarizine. The monthly difference was 0.55 attacks (CI 95%= 0.215 0.895; p= 0.002). Somnolence was the most frequent adverse effect in 20.5% of the subjects (n= 1,987). CONCLUSIONS Based on a small number of trials, flunarizine, at a daily dose of 10 mg lightly reduces the frequency of migraine attacks.
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Affiliation(s)
- L Reveiz-Herault
- Servicio de Medicina Familiar, Instituto Nacional de Cancerología, Pontificia Universidad Javeriana, Bogotá, Colombia.
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