1
|
Acuña JJ, Hu J, Inostroza NG, Valenzuela T, Perez P, Epstein S, Sessitsch A, Zhang Q, Jorquera MA. Endophytic bacterial communities in ungerminated and germinated seeds of commercial vegetables. Sci Rep 2023; 13:19829. [PMID: 37963999 PMCID: PMC10645892 DOI: 10.1038/s41598-023-47099-4] [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: 07/26/2023] [Accepted: 11/09/2023] [Indexed: 11/16/2023] Open
Abstract
Chile is a prominent seed exporter globally, but the seed microbiome of vegetables (46% of seeds) and its role in the early stages of plant growth have remained largely unexplored. Here, we employed DNA metabarcoding analysis to investigate the composition and putative functions of endophytic bacterial communities in ungerminated and germinated seeds of the commercial vegetables Apiaceae (parsley and carrot), Asteraceae (lettuce), Brassicaceae (cabbage and broccoli), and Solanaceae (tomato). Bacterial quantification showed 104 to 108 copies of the 16S rRNA gene per gram of ungerminated and germinated seeds. Alpha diversity analysis (e.g., Chao1, Shannon, and Simpson indices) did not indicate significant differences (Kruskal-Wallis test) between ungerminated and germinated seeds, except for Solanaceae. However, beta diversity (PCoA) analysis showed distinctions (Adonis test) between ungerminated and germinated seeds, except Apiaceae. Pseudomonadota and Bacillota were identified as the dominant and specialist taxa in both ungerminated and germinated seed samples. Chemoheterotrophy and fermentation were predicted as the main microbial functional groups in the endophytic bacterial community. Notably, a considerable number of the 143 isolated endophytic strains displayed plant growth-promoting traits (10 to 64%) and biocontrol activity (74% to 82%) against plant pathogens (Xanthomonas and Pseudomonas). This study revealed the high variability in the abundance, diversity, composition, and functionality of endophytic bacteria between ungerminated and germinated seeds in globally commercialized vegetables. Furthermore, potential beneficial endophytic bacteria contained in their seed microbiomes that may contribute to the microbiome of the early stages, development, growth and progeny of vegetables were found.
Collapse
Affiliation(s)
- Jacquelinne J Acuña
- Laboratorio de Ecología Microbiana Aplicada (EMALAB), Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Ave. Francisco Salazar, 01145, Temuco, Chile
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN), Universidad de La Frontera, Ave. Francisco Salazar, 01145, Temuco, Chile
- Millennium Institute Center for Genome Regulation (MI-CGR), Valenzuela Puelma 10207, 7800003, Santiago, La Reina, Chile
| | - Jingming Hu
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Xiamen University, Xiamen, 361102, China
- College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China
| | - Nitza G Inostroza
- Laboratorio de Ecología Microbiana Aplicada (EMALAB), Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Ave. Francisco Salazar, 01145, Temuco, Chile
| | - Tamara Valenzuela
- Laboratorio de Ecología Microbiana Aplicada (EMALAB), Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Ave. Francisco Salazar, 01145, Temuco, Chile
- Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Ave. Francisco Salazar 01145, Temuco, Chile
| | - Pablo Perez
- Laboratorio de Ecología Microbiana Aplicada (EMALAB), Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Ave. Francisco Salazar, 01145, Temuco, Chile
- Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Ave. Francisco Salazar 01145, Temuco, Chile
| | - Slava Epstein
- College of Science, Northeastern University, 360 Huntington Ave., Boston, MA, 02115, USA
| | - Angela Sessitsch
- Health & Bioresources, AIT Austrian Institute of Technology, Konrad-Lorenz-Straße 24, 3430, Tulln, Austria
| | - Qian Zhang
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Xiamen University, Xiamen, 361102, China.
- College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China.
| | - Milko A Jorquera
- Laboratorio de Ecología Microbiana Aplicada (EMALAB), Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Ave. Francisco Salazar, 01145, Temuco, Chile.
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN), Universidad de La Frontera, Ave. Francisco Salazar, 01145, Temuco, Chile.
| |
Collapse
|
2
|
Mazumdar E, Valenzuela T. 650 “Promoting Adequate Consenting for the Risks of Peri-Operative COVID-19 Complications in Patients Undergoing Surgery During the Pandemic”. Br J Surg 2022. [PMCID: PMC9452077 DOI: 10.1093/bjs/znac269.086] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Introduction Patients with COVID-19 infection peri-operatively can suffer with significant cardiovascular and pulmonary complications, increasing mortality. Clinicians should discuss these risks with their patients as per the Royal College of Surgeons of England guidance (2020), so that patients can make informed decisions. Method Our aim was to identify whether the complications associated with COVID-19 in the peri-operative period was documented on the consent forms of both emergency and elective general surgical patients. To encourage clinicians to consent their patients, we devised a colourful poster, the ‘COVID-19 Consent Poster (CCP)’ which was placed next to the consent form on wards, outpatient clinics and the emergency department. Results A total of 49 procedures took place in the two-week period, of which 67% (n= 34) of patients were consented for the COVID-19 risk, and 33% (n= 15) were not. Following implementation of the CCP, data was recollected to identify whether practice had changed. During this time frame, 26 procedures took place out of which 50% (n=13) were not consented for the risks of COVID-19 complications. Conclusions Following implementation of the CCP, we saw initial rise in the number of consents, but this soon declined. We believe, this might be due to the rates of COVID-19 decreasing in the hospital and the community during the data collection period. Despite these figures, the importance of informed consent around peri-operative complications of COVID-19 remains with more of the population still getting infected with new variants emerging each year.
Collapse
Affiliation(s)
- E Mazumdar
- Royal Glamorgan Hospital, Cardiff, United Kingdom
| | - T Valenzuela
- Royal Glamorgan Hospital, Cardiff, United Kingdom
| |
Collapse
|
3
|
Duarte-Nass C, Rebolledo K, Valenzuela T, Kopp M, Jeison D, Rivas M, Azócar L, Torres-Aravena Á, Ciudad G. Application of microbe-induced carbonate precipitation for copper removal from copper-enriched waters: Challenges to future industrial application. J Environ Manage 2020; 256:109938. [PMID: 31989976 DOI: 10.1016/j.jenvman.2019.109938] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [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: 09/26/2019] [Revised: 11/12/2019] [Accepted: 11/26/2019] [Indexed: 06/10/2023]
Abstract
Copper contamination in watercourses is a recent issue in countries where mining operations are prevalent. In this study, the application of copper precipitation through microbe-induced carbonate precipitation (MICP) was analyzed using urea hydrolysis by bacteria to evaluate precipitated copper carbonates. This article demonstrates the application of a copper precipitation assay involving Sporosarcina pasteurii (in 0.5 mM Cu2+ and 333 mM urea) and analyzes the resultant low removal (10%). The analysis indicates that the low removal was a consequence of Cu2+ complexation with the ammonia resulting from the hydrolysis of urea. However, the results indicate that there should be a positive correlation between the initial urea concentration and the bacterial tolerance to copper. This identifies a challenge in the industrial application of the process, wherein a minimum consumption of urea represents an economic advantage. Therefore, it is necessary to design a sequential process that decouples bacterial growth and copper precipitation, thereby decreasing the urea requirement.
Collapse
Affiliation(s)
- Carla Duarte-Nass
- Doctorate in Engineering Sciences with Specialization in Bioprocesses, Universidad de La Frontera, Avenida Francisco Salazar #01145, Temuco, Chile; Departamento de Ingeniería Química, Universidad de La Frontera, Avenida Francisco Salazar #01145, Temuco, Chile
| | - Katherina Rebolledo
- Facultad de Ingeniería, Universidad Católica de Temuco, Avenida Rudecindo Ortega #02950, Temuco, Chile
| | - Tamara Valenzuela
- Departamento de Ciencias Químicas, Universidad de La Frontera, Avenida Francisco Salazar #01145, Temuco, Chile
| | - Matías Kopp
- Departamento de Ingeniería Química, Universidad de La Frontera, Avenida Francisco Salazar #01145, Temuco, Chile
| | - David Jeison
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Avenida Brasil #2085, Valparaíso, Chile
| | - Mariella Rivas
- Laboratorio de Biotecnología Algal y Sustentabilidad, Departamento de Biotecnología, Facultad de Ciencias del Mar y Recursos Biológicos, Universidad de Antofagasta, Avenida Angamos #601, Antofagasta, Chile
| | - Laura Azócar
- Departamento de Química Ambiental, Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Avenida Alonso de Ribera #2850, Concepción, Chile; Núcleo Milenio en Procesos Catalíticos hacia la Química Sustentable, Universidad de Concepción, Avenida Víctor Lamas #1290, Concepción, Chile
| | - Álvaro Torres-Aravena
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Avenida Brasil #2085, Valparaíso, Chile
| | - Gustavo Ciudad
- Departamento de Ingeniería Química, Universidad de La Frontera, Avenida Francisco Salazar #01145, Temuco, Chile; Instituto del Medio Ambiente (IMA), Universidad de La Frontera, Avenida Francisco Salazar #01145, Temuco, Chile.
| |
Collapse
|
4
|
Ruiz A, Sanhueza M, Gómez F, Tereucán G, Valenzuela T, García S, Cornejo P, Hermosín-Gutiérrez I. Changes in the content of anthocyanins, flavonols, and antioxidant activity in Fragaria ananassa var. Camarosa fruits under traditional and organic fertilization. J Sci Food Agric 2019; 99:2404-2410. [PMID: 30357837 DOI: 10.1002/jsfa.9447] [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: 03/31/2018] [Revised: 10/17/2018] [Accepted: 10/21/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Strawberries are consumed worldwide. In Chile, strawberry production has been established in Andisols, were phosphorus is scarce. Traditional fertilization (TF) and organic fertilization (OF) have both been established there. This study examined their impact on the polyphenolic content of strawberries. RESULTS Two anthocyanins were identified by high performance liquid chromatography with diode array detection coupled to mass spectrometry (HPLC-DAD-ESI-MS/MS). The average total anthocyanin concentrations were found to be 651 mg kg-1 fresh weight in 100% OF, which represents a 56% increase compared to fruits that were not fertilized. In the case of flavonols, only quercetin-rhamnoside was identified, and its concentration reached 14.6 mg kg-1 with 100% OF. The ascorbic acid concentration reached 0.54 g kg-1 in 50% TF (a 20% increase over fruits without fertilization, WF). The antioxidant activities slightly increased in the fruits subjected to TF and OF in comparison with WF treatment. CONCLUSION These results support a management strategy for obtaining the best quality and potential beneficial effects in health by increasing anthocyanins and other polyphenols under OF. © 2018 Society of Chemical Industry.
Collapse
Affiliation(s)
- Antonieta Ruiz
- Dpto. Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
- Centro de Investigación en Micorrizas y Sustentabilidad Agroambiental, CIMYSA, Universidad de La Frontera, Temuco, Chile
| | - Mario Sanhueza
- Dpto. Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - Francisca Gómez
- Dpto. Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - Gonzalo Tereucán
- Dpto. Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - Tamara Valenzuela
- Dpto. Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - Susana García
- Dpto. Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
- Centro de Investigación en Micorrizas y Sustentabilidad Agroambiental, CIMYSA, Universidad de La Frontera, Temuco, Chile
| | - Pablo Cornejo
- Dpto. Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
- Centro de Investigación en Micorrizas y Sustentabilidad Agroambiental, CIMYSA, Universidad de La Frontera, Temuco, Chile
| | - Isidro Hermosín-Gutiérrez
- Instituto Regional de Investigación Científica Aplicada, Universidad de Castilla-La Mancha, Ciudad Real, Spain
| |
Collapse
|
5
|
Valenzuela T, Fellows D, Zaben M, Shastin D, Leach P. P15 Resuming antiplatelet and anticoagulant therapy following isolated traumatic brain injury in adults: a national survey and review of literature. J Neurol Neurosurg Psychiatry 2019. [DOI: 10.1136/jnnp-2019-abn.93] [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: 11/03/2022]
Abstract
ObjectivesAntithrombotics use in the elderly is widespread and is seen as a risk factor for intracranial complications following TBI. Antithrombotics are commonly discontinued on admission, with little guidance on when or how to restart them. This study aims to establish current national practices with restarting antithrombotic medications following TBI and review available evidence identifying areas for further research.DesignAn online survey and a literature review.SubjectsSBNS members.MethodsA SBNS Academic Committee approved survey with five TBI scenarios dealing with different antithrombotics. Respondents were asked to indicate when they would restart the medications for each scenario and what drives their decision.ResultsPreliminary results included responses from 22 consultants. The most common practice was to restart antithrombotics after two weeks; however, less than 50% agreed on each individual option. About 50% had the same approach to everything and 1/3 believed single antiplatelet can be resumed earlier than dual antiplatelets. Other deciding factors included size of intracranial bleed, patient’s neurological recovery, and follow up imaging. Some advocated involving the physicians. Final results following a repeat dissemination of the survey will be presented at the meeting.ConclusionsThere is obvious discrepancy in how the problem of restarting antithombotics following TBI is approached nationally. Further research is needed to help decision making with this everyday clinical problem.
Collapse
|
6
|
Parada J, Valenzuela T, Gómez F, Tereucán G, García S, Cornejo P, Winterhalter P, Ruiz A. Effect of fertilization and arbuscular mycorrhizal fungal inoculation on antioxidant profiles and activities in Fragaria ananassa fruit. J Sci Food Agric 2019; 99:1397-1404. [PMID: 30120790 DOI: 10.1002/jsfa.9316] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [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: 06/24/2018] [Revised: 08/11/2018] [Accepted: 08/12/2018] [Indexed: 05/26/2023]
Abstract
BACKGROUND The main methods used to increase the yield and quality of strawberry fruit produced in acidic soils with low P availability include root colonization by arbuscular mycorrhizal (AM) fungi and adjusting the type of P supplementation by means of traditional (TF) or organic (OF) fertilization, and adjusting nutrient doses. In this study, the antioxidant properties of strawberry fruit were evaluated under different treatments of fertilization (TF or OF) and different doses of P supplied at planting (0, 50 or 100% of the agronomic recommendation) and in the presence or absence of AM fungus as a bioinoculant. RESULTS Fruits without fertilization treatments and with TF presented with higher anthocyanin concentrations. In general, higher values were obtained without AM colonization. However, spectrophotometric tests showed the highest activity and concentration in the AM-inoculated treatments. It is likely that phenolic compounds other than anthocyanins are present in the extracts. These other compounds could not be identified by the method used but could be detected by the Folin-Ciocalteu method. CONCLUSION This study provides information that allows for improvements in strawberry fruit quality by agronomic management, with a potential beneficial effect on the health of consumers. © 2018 Society of Chemical Industry.
Collapse
Affiliation(s)
- José Parada
- Departamento de Ciencias Químicas y Recursos Naturales, Scientific and Technological Bioresource Nucleus BIOREN-UFRO, Universidad de La Frontera, Temuco, Chile
| | - Tamara Valenzuela
- Departamento de Ciencias Químicas y Recursos Naturales, Scientific and Technological Bioresource Nucleus BIOREN-UFRO, Universidad de La Frontera, Temuco, Chile
| | - Francisca Gómez
- Departamento de Ciencias Químicas y Recursos Naturales, Scientific and Technological Bioresource Nucleus BIOREN-UFRO, Universidad de La Frontera, Temuco, Chile
| | - Gonzalo Tereucán
- Departamento de Ciencias Químicas y Recursos Naturales, Scientific and Technological Bioresource Nucleus BIOREN-UFRO, Universidad de La Frontera, Temuco, Chile
| | - Susana García
- Departamento de Ciencias Químicas y Recursos Naturales, Scientific and Technological Bioresource Nucleus BIOREN-UFRO, Universidad de La Frontera, Temuco, Chile
- Centro de Investigación en Micorrizas y Sustentabilidad Agroambiental, CIMYSA, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - Pablo Cornejo
- Departamento de Ciencias Químicas y Recursos Naturales, Scientific and Technological Bioresource Nucleus BIOREN-UFRO, Universidad de La Frontera, Temuco, Chile
- Centro de Investigación en Micorrizas y Sustentabilidad Agroambiental, CIMYSA, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | | | - Antonieta Ruiz
- Departamento de Ciencias Químicas y Recursos Naturales, Scientific and Technological Bioresource Nucleus BIOREN-UFRO, Universidad de La Frontera, Temuco, Chile
- Centro de Investigación en Micorrizas y Sustentabilidad Agroambiental, CIMYSA, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| |
Collapse
|
7
|
Madrazo I, Kopyov O, Ávila-Rodríguez MA, Ostrosky F, Carrasco H, Kopyov A, Avendaño-Estrada A, Jiménez F, Magallón E, Zamorano C, González G, Valenzuela T, Carrillo R, Palma F, Rivera R, Franco-Bourland RE, Guízar-Sahagún G. Transplantation of Human Neural Progenitor Cells (NPC) into Putamina of Parkinsonian Patients: A Case Series Study, Safety and Efficacy Four Years after Surgery. Cell Transplant 2018; 28:269-285. [PMID: 30574805 PMCID: PMC6425108 DOI: 10.1177/0963689718820271] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Individuals with Parkinson’s disease (PD) suffer from motor and mental disturbances due to degeneration of dopaminergic and non-dopaminergic neuronal systems. Although they provide temporary symptom relief, current treatments fail to control motor and non-motor alterations or to arrest disease progression. Aiming to explore safety and possible motor and neuropsychological benefits of a novel strategy to improve the PD condition, a case series study was designed for brain grafting of human neural progenitor cells (NPCs) to a group of eight patients with moderate PD. A NPC line, expressing Oct-4 and Sox-2, was manufactured and characterized. Using stereotactic surgery, NPC suspensions were bilaterally injected into patients’ dorsal putamina. Cyclosporine A was given for 10 days prior to surgery and continued for 1 month thereafter. Neurological, neuropsychological, and brain imaging evaluations were performed pre-operatively, 1, 2, and 4 years post-surgery. Seven of eight patients have completed 4-year follow-up. The procedure proved to be safe, with no immune responses against the transplant, and no adverse effects. One year after cell grafting, all but one of the seven patients completing the study showed various degrees of motor improvement, and five of them showed better response to medication. PET imaging showed a trend toward enhanced midbrain dopaminergic activity. By their 4-year evaluation, improvements somewhat decreased but remained better than at baseline. Neuropsychological changes were minor, if at all. The intervention appears to be safe. At 4 years post-transplantation we report that undifferentiated NPCs can be delivered safely by stereotaxis to both putamina of patients with PD without causing adverse effects. In 6/7 patients in OFF condition improvement in UPDRS III was observed. PET functional scans suggest enhanced putaminal dopaminergic neurotransmission that could correlate with improved motor function, and better response to L-DOPA. Patients’ neuropsychological scores were unaffected by grafting. Trial Registration: Fetal derived stem cells for Parkinson’s disease https://doi.org/10.1186/ISRCTN39104513Reg#ISRCTN39104513
Collapse
Affiliation(s)
- I Madrazo
- 1 Hospital General de México "Dr. Eduardo Liceaga", Mexico City, Mexico
| | - O Kopyov
- 2 Celavie Biosciences LLC, Oxnard, CA, USA
| | - M A Ávila-Rodríguez
- 3 Unidad Radiofarmacia-Ciclotron, Facultad de Medicina, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico
| | - F Ostrosky
- 4 Facultad de Psicología, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico
| | - H Carrasco
- 5 Hospital Central Militar, Mexico City, Mexico
| | - A Kopyov
- 2 Celavie Biosciences LLC, Oxnard, CA, USA
| | - A Avendaño-Estrada
- 3 Unidad Radiofarmacia-Ciclotron, Facultad de Medicina, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico
| | - F Jiménez
- 6 Hospital Angeles Pedregal, Mexico City, Mexico.,7 Neuroscience Center, Hospital Angeles Pedregal, Mexico City, Mexico
| | - E Magallón
- 6 Hospital Angeles Pedregal, Mexico City, Mexico.,7 Neuroscience Center, Hospital Angeles Pedregal, Mexico City, Mexico
| | - C Zamorano
- 6 Hospital Angeles Pedregal, Mexico City, Mexico.,7 Neuroscience Center, Hospital Angeles Pedregal, Mexico City, Mexico
| | - G González
- 4 Facultad de Psicología, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico
| | - T Valenzuela
- 6 Hospital Angeles Pedregal, Mexico City, Mexico.,7 Neuroscience Center, Hospital Angeles Pedregal, Mexico City, Mexico
| | - R Carrillo
- 6 Hospital Angeles Pedregal, Mexico City, Mexico
| | - F Palma
- 6 Hospital Angeles Pedregal, Mexico City, Mexico
| | - R Rivera
- 6 Hospital Angeles Pedregal, Mexico City, Mexico
| | - R E Franco-Bourland
- 8 Department of Biochemistry, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Mexico City, Mexico
| | - G Guízar-Sahagún
- 9 Centro Medico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| |
Collapse
|
8
|
Delbaere K, Valenzuela T, Woodbury A, Davies T, Yeong J, Steffens D, Miles L, Pickett L, Zijlstra GAR, Clemson L, Close JCT, Howard K, Lord SR. Evaluating the effectiveness of a home-based exercise programme delivered through a tablet computer for preventing falls in older community-dwelling people over 2 years: study protocol for the Standing Tall randomised controlled trial. BMJ Open 2015; 5:e009173. [PMID: 26493461 PMCID: PMC4620168 DOI: 10.1136/bmjopen-2015-009173] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
INTRODUCTION In order to prevent falls, older people should exercise for at least 2 h per week for 6 months, with a strong focus on balance exercises. This article describes the design of a randomised controlled trial to evaluate the effectiveness of a home-based exercise programme delivered through a tablet computer to prevent falls in older people. METHODS AND ANALYSIS Participants aged 70 years or older, living in the community in Sydney will be recruited and randomly allocated to an intervention or control group. The intervention consists of a tailored, home-based balance training delivered through a tablet computer. Intervention participants will be asked to complete 2 h of exercises per week for 2 years. Both groups will receive an education programme focused on health-related information relevant to older adults, delivered through the tablet computer via weekly fact sheets. Primary outcome measures include number of fallers and falls rate recorded in weekly fall diaries at 12 months. A sample size of 500 will be necessary to see an effect on falls rate. Secondary outcome measures include concern about falling, depressive symptoms, health-related quality of life and physical activity levels (in all 500 participants); and physiological fall risk, balance, functional mobility, gait, stepping and cognitive performance (in a subsample of 200 participants). Adherence, acceptability, usability and enjoyment will be recorded in intervention group participants over 2 years. Data will be analysed using the intention-to-treat principle. Secondary analyses are planned in people with greater adherence. Economic analyses will be assessed from a health and community care provider perspective. ETHICS AND DISSEMINATION Ethical approval was obtained from UNSW Ethics Committee in December 2014 (ref number HC#14/266). Outcomes will be disseminated through publication in peer-reviewed journals and presentations at international conferences. TRIAL REGISTRATION NUMBER Australian New Zealand Clinical Trials Registry (ACTRN)12615000138583.
Collapse
Affiliation(s)
- K Delbaere
- Neuroscience Research Australia, University of New South Wales, Sydney, New South Wales, Australia
| | - T Valenzuela
- Neuroscience Research Australia, University of New South Wales, Sydney, New South Wales, Australia
| | - A Woodbury
- Neuroscience Research Australia, University of New South Wales, Sydney, New South Wales, Australia
| | - T Davies
- Neuroscience Research Australia, University of New South Wales, Sydney, New South Wales, Australia
| | - J Yeong
- Neuroscience Research Australia, University of New South Wales, Sydney, New South Wales, Australia
| | - D Steffens
- Neuroscience Research Australia, University of New South Wales, Sydney, New South Wales, Australia
| | - L Miles
- Neuroscience Research Australia, University of New South Wales, Sydney, New South Wales, Australia
| | - L Pickett
- Neuroscience Research Australia, University of New South Wales, Sydney, New South Wales, Australia
| | - G A R Zijlstra
- Department of Health Services Research—Focusing on Chronic Care and Ageing, CAPHRI School for Public Health and Primary Care, Maastricht University, Maastricht, The Netherlands
| | - L Clemson
- Sydney School of Public Health, The University of Sydney, Sydney, New South Wales, Australia
- Ageing Work and Health Research Unit, Faculty of Health Sciences, The University of Sydney, Lidcombe, New South Wales, Australia
| | - J C T Close
- Neuroscience Research Australia, University of New South Wales, Sydney, New South Wales, Australia
- Prince of Wales Clinical School, Sydney, New South Wales, Australia
| | - K Howard
- Sydney School of Public Health, The University of Sydney, Sydney, New South Wales, Australia
- Institute for Choice UniSA, North Sydney, New South Wales, Australia
| | - S R Lord
- Neuroscience Research Australia, University of New South Wales, Sydney, New South Wales, Australia
| |
Collapse
|
9
|
Zbinden-Foncea H, Valenzuela T, Espíldora F, Peñailillo L, Willems PA. Muscular power as a function of load in elderly women. Comput Methods Biomech Biomed Engin 2014; 17 Suppl 1:92-3. [PMID: 25074180 DOI: 10.1080/10255842.2014.931157] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- H Zbinden-Foncea
- a Exercise Science Laboratory, Faculty of Medicine , Universidad Finis Terrae , Santiago , Chile
| | | | | | | | | |
Collapse
|
10
|
Müntinga H, Ahlers H, Krutzik M, Wenzlawski A, Arnold S, Becker D, Bongs K, Dittus H, Duncker H, Gaaloul N, Gherasim C, Giese E, Grzeschik C, Hänsch TW, Hellmig O, Herr W, Herrmann S, Kajari E, Kleinert S, Lämmerzahl C, Lewoczko-Adamczyk W, Malcolm J, Meyer N, Nolte R, Peters A, Popp M, Reichel J, Roura A, Rudolph J, Schiemangk M, Schneider M, Seidel ST, Sengstock K, Tamma V, Valenzuela T, Vogel A, Walser R, Wendrich T, Windpassinger P, Zeller W, van Zoest T, Ertmer W, Schleich WP, Rasel EM. Interferometry with Bose-Einstein condensates in microgravity. Phys Rev Lett 2013; 110:093602. [PMID: 23496709 DOI: 10.1103/physrevlett.110.093602] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Indexed: 06/01/2023]
Abstract
Atom interferometers covering macroscopic domains of space-time are a spectacular manifestation of the wave nature of matter. Because of their unique coherence properties, Bose-Einstein condensates are ideal sources for an atom interferometer in extended free fall. In this Letter we report on the realization of an asymmetric Mach-Zehnder interferometer operated with a Bose-Einstein condensate in microgravity. The resulting interference pattern is similar to the one in the far field of a double slit and shows a linear scaling with the time the wave packets expand. We employ delta-kick cooling in order to enhance the signal and extend our atom interferometer. Our experiments demonstrate the high potential of interferometers operated with quantum gases for probing the fundamental concepts of quantum mechanics and general relativity.
Collapse
Affiliation(s)
- H Müntinga
- ZARM, Universität Bremen, Am Fallturm, 28359 Bremen, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Latifi R, Weinstein RS, Porter JM, Ziemba M, Judkins D, Ridings D, Nassi R, Valenzuela T, Holcomb M, Leyva F. Telemedicine and telepresence for trauma and emergency care management. Scand J Surg 2008; 96:281-9. [PMID: 18265854 DOI: 10.1177/145749690709600404] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The use of telemedicine is long-standing, but only in recent years has it been applied to the specialities of trauma, emergency care, and surgery. Despite being relatively new, the concept of teletrauma, telepresence, and telesurgery is evolving and is being integrated into modern care of trauma and surgical patients. This paper will address the current applications of telemedicine and telepresence to trauma and emergency care as the new frontiers of telemedicine application. The University Medical Center and the Arizona Telemedicine Program (ATP) in Tucson, Arizona have two functional teletrauma and emergency telemedicine programs and one ad-hoc program, the mobile telemedicine program. The Southern Arizona Telemedicine and Telepresence (SATT) program is an inter-hospital telemedicine program, while the Tucson ER-link is a link between prehospital and emergency room system, and both are built upon a successful existing award winning ATP and the technical infrastructure of the city of Tucson. These two programs represent examples of integrated and collaborative community approaches to solving the lack of trauma and emergency care issue in the region. These networks will not only be used by trauma, but also by all other medical disciplines, and as such have become an example of innovation and dedication to trauma care. The first case of trauma managed over the telemedicine trauma program or "teletrauma" was that of an 18-month-old girl who was the only survival of a car crash with three fatalities. The success of this case and the pilot project of SATT that ensued led to the development of a regional teletrauma program serving close to 1.5 million people. The telepresence of the trauma surgeon, through teletrauma, has infused confidence among local doctors and communities and is being used to identify knowledge gaps of rural health care providers and the needs for instituting new outreach educational programs.
Collapse
Affiliation(s)
- R Latifi
- University of Arizona, Division of Trauma, Critical Care and Emergency Surgery, Arizona Telemedicine Program, Telesurgery and International Affairs, Telemedicine Services, The University Medical Center, Tucson, Arizona, USA.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Verdú J, Djekić S, Stahl S, Valenzuela T, Vogel M, Werth G, Beier T, Kluge HJ, Quint W. Electronic g factor of hydrogenlike oxygen 16O7+. Phys Rev Lett 2004; 92:093002. [PMID: 15089462 DOI: 10.1103/physrevlett.92.093002] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2003] [Indexed: 05/24/2023]
Abstract
We present an experimental value for the g factor of the electron bound in hydrogenlike oxygen, which is found to be g(expt)=2.000 047 025 4 (15)(44). The experiment was performed on a single 16O7+ ion stored in a Penning trap. For the first time, the expected line shape of the g-factor resonance is calculated which is essential for minimizing the systematic uncertainties. The measurement agrees within 1.1 sigma with the predicted theoretical value g(theory)=2.000 047 020 2 (6). It represents a stringent test of bound-state quantum electrodynamics to a 0.25% level. Assuming the validity of the underlying theory, a value for the electron mass is obtained: m(e)=0.000 548 579 909 6 (4) u. This value agrees with our earlier determination on and allows a combination of both values which is about 4 times more precise than the currently accepted one.
Collapse
Affiliation(s)
- J Verdú
- Institut für Physik, Johannes-Gutenberg-Universität, D-55099 Mainz, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Abstract
BACKGROUND Out-of-hospital cardiac arrest is frequent and has poor outcomes. Defibrillation by trained targeted nontraditional responders improves survival versus historical controls, but it is unclear whether such defibrillation is a good value for the money. Therefore, this study estimated the incremental cost effectiveness of defibrillation by targeted nontraditional responders in public settings by using decision analysis. METHODS AND RESULTS A Markov model evaluated the potential cost effectiveness of standard emergency medical services (EMS) versus targeted nontraditional responders. Standard EMS included first-responder defibrillation followed by advanced life support. Targeted nontraditional responders included standard EMS supplemented by defibrillation by trained lay responders. The analysis adopted a US societal perspective. Input data were derived from published or publicly available data. Future costs and effects were discounted at 3%. Monte Carlo simulation and sensitivity analyses assessed the robustness of results. Standard EMS had a median of 0.47 (interquartile range [IQR]=0.32 to 0.69) quality-adjusted life years and a median of 14 100 dollars (IQR=8600 dollars to 21 900 dollars) costs per arrest. Targeted nontraditional responders in casinos had an incremental cost of a median 56 700 dollars (IQR=44 100 dollars to 77 200 dollars) per additional quality-adjusted life year. The results were sensitive to changes in time to defibrillation, incidence of arrest, and number of devices required to implement rapid defibrillation. CONCLUSIONS Where cardiac arrest is frequent and response time intervals are short, rapid defibrillation by targeted nontraditional responders may be a good value for the money compared with standard EMS. The incidence of arrest should be considered when choosing locations to implement public access defibrillation.
Collapse
Affiliation(s)
- G Nichol
- F699 Clinical Epidemiology Program, Ottawa Health Research Institute, Ottawa Hospital, 1053 Carling Ave, Ottawa, Ontario K1Y 4E9, Canada
| | | | | | | | | | | |
Collapse
|
14
|
Verdú J, Beier T, Djekic S, Häffner H, Kluge HJ, Quint W, Valenzuela T, Werth G. Measurement of thegFactor of the Bound Electron in Hydrogen-like Oxygen16O7+. ACTA ACUST UNITED AC 2003. [DOI: 10.1023/b:hype.0000004230.56080.69] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
15
|
Affiliation(s)
- I Jacobs
- University of Western Australia, Nedlands, Australia.
| | | | | | | | | | | | | | | |
Collapse
|
16
|
Abstract
Optimal prehospital cardiovascular care may improve the morbidity and mortality associated with acute myocardial infarctions (AMIs) that begin in the community. Reducing the time delays from AMI symptom onset to intervention begins with maximizing effective patient education to reduce patient delay in recognizing symptoms and seeking assistance. Transportation delays can be minimized by appropriate use of 911 systems and improving technological 911 support. Patient triage to heart centers from the prehospital setting requires strict and comprehensive definition of the criteria for these centers by competent, unbiased clinical societies or governmental agencies. Prehospital 12-lead electrocardiograms and initiation of thrombolytic therapy can provide acute diagnosis and early treatment, thus facilitating faster processing and more directed in-hospital intervention. They also minimize over- and undertriage of patients to cardiac centers. Although evidence from investigational trials suggests that many of these procedures are effective, more research is required to ensure correct implementation and quality assurance at all emergency service levels.
Collapse
Affiliation(s)
- J H Brice
- University of North Carolina School of Medicine, Chapel Hill 27599-7594, USA.
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Cummins RO, Hazinski MF, Kerber RE, Kudenchuk P, Becker L, Nichol G, Malanga B, Aufderheide TP, Stapleton EM, Kern K, Ornato JP, Sanders A, Valenzuela T, Eisenberg M. Low-energy biphasic waveform defibrillation: evidence-based review applied to emergency cardiovascular care guidelines: a statement for healthcare professionals from the American Heart Association Committee on Emergency Cardiovascular Care and the Subcommittees on Basic Life Support, Advanced Cardiac Life Support, and Pediatric Resuscitation. Circulation 1998; 97:1654-67. [PMID: 9593576 DOI: 10.1161/01.cir.97.16.1654] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
18
|
Nichol G, Hallstrom AP, Ornato JP, Riegel B, Stiell IG, Valenzuela T, Wells GA, White RD, Weisfeldt ML. Potential cost-effectiveness of public access defibrillation in the United States. Circulation 1998; 97:1315-20. [PMID: 9570205 DOI: 10.1161/01.cir.97.13.1315] [Citation(s) in RCA: 94] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Approximately 360,000 Americans experience sudden cardiac arrest each year; current treatments are expensive and not very effective. Public access defibrillation (PAD) is a novel treatment for out-of-hospital sudden cardiac arrest that refers to use of automated external defibrillators by the lay public or by nonmedical personnel such as police. A clinical trial has been proposed to evaluate the effectiveness of public access defibrillation, but it is unclear whether such early defibrillation will offer sufficient value for money. Our objective was to estimate the potential cost-effectiveness of public access defibrillation by use of decision analysis. METHODS AND RESULTS A decision model compared the potential cost-effectiveness of standard emergency medical services (EMS) systems with that of EMS supplemented by PAD. We considered defibrillation by lay responders or police, using an analysis with a US health-care perspective. Input data were derived from published data or fiscal databases. Future costs and effects were discounted at 3%. Monte Carlo simulation was performed to estimate the variability in the costs and effects of each program. Sensitivity analyses assessed the robustness of the results to changes in input data. A standard EMS system had a median cost of $5900 per cardiac arrest patient (interquartile range, IQR, $3200 to $10,900) and yielded a median of 0.25 quality-adjusted life years (IQR, 0.20 to 0.30). PAD by lay responders had a median incremental cost of $44,000 per additional quality-adjusted life year (IQR, $29,000 to $68,900). PAD by police had a median incremental cost of $27,200 per additional quality-adjusted life year (IQR, $15,700 to $47,800). The results were sensitive to changes in the cost and relative survival benefit of PAD. CONCLUSIONS Although more expensive than standard EMS for sudden cardiac arrest, PAD may be economically attractive. The effectiveness and cost-effectiveness of PAD should be assessed in a randomized, controlled trial.
Collapse
Affiliation(s)
- G Nichol
- Loeb Medical Research Institute, University of Ottawa, Canada
| | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Valenzuela T, Nuñez M, Siles E, Villalobos M, Pedraza V, Gordon A, McMillan T, Ruiz de Almodóvar J. 836 P16 and P53 levels after different treatments in human tumor cells. Eur J Cancer 1995. [DOI: 10.1016/0959-8049(95)96085-r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
20
|
Goldberg J, Dietrich R, Chen JM, Mitwasi M, Valenzuela T, Criss E. A simulation model for evaluating a set of emergency vehicle base locations: development, validation, and usage. Socioecon Plann Sci 1990; 24:125-141. [PMID: 10108911 DOI: 10.1016/0038-0121(90)90017-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
This paper describes our experiences in developing a simulation model for evaluating a set of emergency response vehicle base locations. The project was undertaken jointly by the University of Arizona and the Tucson Fire Department. The issues of model development, data collection, model validation, and experimentation are discussed. The critical nature of the problem and the clients' lack of experience with mathematical models, made model validation the major step in gaining user acceptance. We show that looking solely at standard performance statistics such as the calls successfully serviced, may lead to the acceptance of an invalid model. We also show that the high level of detail used in many simulation models for evaluating base locations is unnecessary in the current case. An analysis evaluating two alternative sets of locations for the Tucson system is discussed.
Collapse
Affiliation(s)
- J Goldberg
- Arizona Health Sciences Center, University of Arizona, Tucson 85721
| | | | | | | | | | | |
Collapse
|
21
|
Butman SM, Valenzuela T. Chest pain: can we overemphasize that 'time is myocardium'? Ann Emerg Med 1989; 18:789-91. [PMID: 2500045 DOI: 10.1016/s0196-0644(89)80023-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
22
|
Abstract
Governmental regulation of emergency medical services and transportation differs from state to state. In Arizona, the Department of Health Services (ADHS) regulates the provision of ambulance service through a "certificate-of-necessity" (CON) process. Paramedic rescue services provided by municipalities are not, by statute, mandated to comply with these ADHS regulations. We review the way in which criteria for the determination of ambulance need were adopted by this state agency and the effects of their application in Tucson, Arizona. Approximately one million dollars and 5,500 unnecessary "code 3" (lights and siren activated) emergency vehicle trips were mandated by the ADHS need criteria, over a twelve-month period. We conclude that non-scientifically-derived regulatory criteria may conflict with prudent medical control of prehospital emergency medical services (EMS).
Collapse
Affiliation(s)
- T Valenzuela
- Arizona Health Sciences Center, University of Arizona, Tucson 85724
| | | | | | | | | |
Collapse
|
23
|
Abstract
A review of all railroad-related deaths and significant injuries that occurred in a medium-sized metropolitan area from January 1, 1979, to June 30, 1986, was conducted. Autopsy reports were obtained for each fatality, and pre-hospital data were retrieved for all railroad-related injuries resulting in emergency medical services dispatch. There were ten fatalities (24%) and 31 survivors. The average age was 31.2 years (range, 1 to 67). Thirty-seven (90%) were men. Eleven persons (27%) were intoxicated (average blood alcohol of 279 mg/dL; range, 140 to 460). Of the 30 survivors transported, hospital records were available for 24. Thirteen were hospitalized and ten underwent surgery. Six major amputations occurred among survivors. Six patients had an Injury Severity Score of more than 15. Three mechanisms of injury occurred: falls on or from a train (56%); pedestrians hit by a train (41%), which accounted for all fatalities; and a train-automobile accident. This is the first comprehensive review of all significant railroad-related injuries in a metropolitan area.
Collapse
Affiliation(s)
- D Spaite
- Department of Surgery, University of Arizona, College of Medicine, Tucson
| | | | | | | | | |
Collapse
|
24
|
Abstract
We performed a ten-week study to understand the feasibility of a fast track system within a teaching hospital setting. Our results show that 50% or fewer of patients entering an emergency department during evening and weekend day hours can be seen in Fast Track. Average turnaround time for all patients in the ED was 161 minutes. The average for all Fast Track patients was 94.5 minutes; if laboratory and/or radiographs were ordered the average was 121.5 minutes; with no laboratory/radiographs, 79.1 minutes. Urinalysis, strep screen, and complete blood count accounted for 80% of all laboratory work. Roentgenograms of the ankle, foot, and knee accounted for 80% of all radiographs. An evaluation questionnaire showed enhanced satisfaction with a reduction in the number of complaints from 79% to 22%. The Fast Track system failed when there was a predominance of acutely ill patients in the ED, as house officers were pulled to care for the acutely ill patients.
Collapse
Affiliation(s)
- H W Meislin
- Department of Surgery, Arizona Health Sciences Center, Tucson 85724
| | | | | | | |
Collapse
|