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Smith AF, Schmidt CM, Tabbaa A, Gutiérrez S, Simon P, Mighell MA, Frankle MA. Glenoid-based reference system to differentiate shoulder pathologies on plain radiographs. J Shoulder Elbow Surg 2024; 33:S111-S121. [PMID: 37777046 DOI: 10.1016/j.jse.2023.08.025] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 08/07/2023] [Accepted: 08/27/2023] [Indexed: 10/02/2023]
Abstract
BACKGROUND Shoulder radiographs are used for evaluation and the planning of treatment of various pathologies. Making a diagnosis of these pathologies on plain radiographs occurs by recognizing the relationship of the humeral head on the registry of the glenoid. Quantification of these changes in registry does not currently exist. We hypothesize that a geometric relationship of the humeral head and the glenoid exists that is defined on an anteroposterior Grashey view radiograph by the relationship of the best-fit circle of the humeral head relative to the best-fit circle of the glenoid such that relative measurements will define the normal shoulder and the pathologic shoulder. METHODS One hundred fifty-six shoulders were included: 53 normal shoulders, 51 with primary glenohumeral osteoarthritis (GHOA), and 52 with cuff tear arthropathy (CTA). Humeral head best-fit circle was used to define the circle of the humeral head (cHH). A glenoid best-fit circle (cG) was defined by the following rules: (1) best fit of the glenoid articular surface and (2) was limited by the acromion such that either (a) it reaches maximal interaction with the inferior surface of the acromion or (b) the perimeter of the circle is at the lateralmost point of the acromion. The relationship between cHH and cG is defined by measurement of cHH in horizontal and vertical planes relative to the glenoid circle reference. The horizontal displacement angle (HDA) measures the horizontal position of cHH relative to cG, representing the degree of medialization toward the glenoid. The vertical displacement angle (VDA) measures the vertical position of cHH relative to cG, representing the degree of superiorization toward the acromion. Angles were compared by diagnosis and sex. RESULTS The mean HDA was 61.0° (95% confidence interval [CI] 60.3°-61.7°) in normal shoulders, 79.9° (95% CI 76.9°-82.9°) in GHOA, and 63.4° (95% CI 61.7°-65.1°) in CTA (P < .001). The mean VDA was 43.1° (95% CI 42.2°-44.0°) in normal shoulders, 40.9° (95% CI 39.9°-42.0°) in GHOA, and 59.7° (95% CI 57.6°-61.7°) in CTA (P < .001). Interobserver reliability was 0.991 (95% CI 0.94-1.0) and intraobserver reliability was 0.998 (95% CI 0.99-1.0). The geometric relationship of cHH to the glenoid circle reference was plotted for each group. CONCLUSION A geometric relationship exists of the humeral head in reference to the glenoid circle. Together, the HDA and the VDA distinguish between a normal shoulder and those with GHOA or CTA. This suggests that this novel methodology may provide a preoperative planning tool that is easily accessible.
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Affiliation(s)
- Austin F Smith
- Florida Orthopaedic Institute, Shoulder & Elbow Department, Tampa, FL, USA; OrthoArizona, Phoenix, AZ, USA
| | - Christian M Schmidt
- Department of Orthopaedics and Sports Medicine, University of South Florida Morsani College of Medicine, Tampa, FL, USA
| | - Ameer Tabbaa
- Foundation for Orthopaedic Research and Education, Tampa, FL, USA
| | - Sergio Gutiérrez
- Foundation for Orthopaedic Research and Education, Tampa, FL, USA
| | - Peter Simon
- Foundation for Orthopaedic Research and Education, Tampa, FL, USA
| | - Mark A Mighell
- Florida Orthopaedic Institute, Shoulder & Elbow Department, Tampa, FL, USA; Department of Orthopaedics and Sports Medicine, University of South Florida Morsani College of Medicine, Tampa, FL, USA
| | - Mark A Frankle
- Florida Orthopaedic Institute, Shoulder & Elbow Department, Tampa, FL, USA; Department of Orthopaedics and Sports Medicine, University of South Florida Morsani College of Medicine, Tampa, FL, USA.
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Diaz MA, Hutchinson AJ, Ricchetti ET, Hsu JE, Garrigues GE, Gutiérrez S, Frankle MA. How to avoid baseplate failure: the effect of compression and reverse shoulder arthroplasty baseplate design on implant stability. J Shoulder Elbow Surg 2024; 33:389-398. [PMID: 37689101 DOI: 10.1016/j.jse.2023.07.043] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 07/10/2023] [Accepted: 07/29/2023] [Indexed: 09/11/2023]
Abstract
BACKGROUND Failure to achieve fixation of the glenoid baseplate will lead to clinical failure. The fixation of the baseplate to the scapula must be able to withstand sufficient shear forces to allow bony ingrowth. The importance of compression to neutralize the forces at the baseplate-bone interface has been assumed to be critical in limiting excessive micromotion. The purpose of this study is to determine the effect of compression on implant stability with different baseplate designs. METHODS Various baseplate designs (1-piece monolithic central screw [1P], 2-piece locking central screw [2PL], and 2-piece nonlocking center screw [2PNL]) were investigated at 3 different compressive forces (high [810 N], medium [640 N], and low [530 N]). Synthetic bone cylinders were instrumented, and peripheral screws were used in all models. The combination of 1 locking and 3 nonlocking peripheral screw fixation was selected as worst-case scenario. Dynamic testing protocol followed the ASTM F2028-17 standard. The baseplate micromotion at high compression was compared to low compression. Additionally, the baseplate micromotion for each design was compared at baseline (first 50 cycles) and at 10,000 cycles for the 3 different compressive forces where motion above 150 μm was defined as failure. RESULTS Baseplate micromotion was found to negatively correlate with compression (rpb = -0.83, P < .0001). At baseline, all baseplate designs were considered stable, regardless of compression. With high compression, average micromotion at the glenoid baseplate-bone interface remained below the 150-μm threshold for all baseplate designs at 10,000 cycles (1P: 50 ± 10 μm; 2PL: 78 ± 32 μm; 2PNL: 79 ± 8 μm; P = .060). With medium compression, average micromotion at 10,000 cycles for all 3 designs remained below the 150-μm threshold (1P: 88 ± 22 μm; 2PL: 132 ± 26 μm; 2PNL: 107 ± 39 μm). The 2PL design had the highest amount of micromotion (P = .013). With low compression, both 2-piece designs had an average micromotion above the 150-μm threshold whereas the 1-piece design did not (1P: 133 ± 35 μm; 2PL: 183 ± 21 μm; 2PNL: 166 ± 39 μm). The 2PL design had significantly higher micromotion when compared to 1P design (P = .041). DISCUSSION The stability of a central screw baseplate correlates with the amount of compression obtained and is affected by implant design. For the same amount of compression, more micromotion is observed in a 2-piece design than a 1-piece design.
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Affiliation(s)
- Miguel A Diaz
- Foundation for Orthopaedic Research & Education, Tampa, FL, USA
| | | | - Eric T Ricchetti
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, OH, USA
| | - Jason E Hsu
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, WA, USA
| | - Grant E Garrigues
- Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, IL, USA
| | | | - Mark A Frankle
- Department of Orthopaedics & Sports Medicine, University of South Florida, Tampa, FL, USA; Florida Orthopaedic Institute, Tampa, FL, USA.
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Cancino J, Soto F, Martinez S, Gutiérrez S. [Temporomandibular manifestation in patients with Ehlers-Danlos syndrome: a systematic review]. Rev Cient Odontol (Lima) 2023; 11:e164. [PMID: 38288000 PMCID: PMC10809962 DOI: 10.21142/2523-2754-1103-2023-164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Accepted: 07/17/2023] [Indexed: 01/31/2024] Open
Abstract
Introduction Ehlers-Danlos Syndrome (EDS) consists of a group of diseases that imply a disorder among individuals connective tissue due to an altered collagen production. Fibrocartilaginous structures, support ligaments, disc and retrodiscal from the temporomandibular joint are composed primarily of collagen. Objective Identify TMJ manifestations in patients with different types of EDS. Materials and Methods: a systematic review of the literature was performed on PubMed, Scopus and Web of Science databases. Observational studies and case series reports published either in spanish or panish were included up until January 2023. Results 12 articles met the inclusion criterial. The prevalence of temporomandibular disorders varies from 26.6% to 100%, being EDSh the most reported subtype, whereas disc displacement with or without reduction and joint hypermobility were the most reported joint disorders. Conclusion Temporomandibular pathologies are common in patients with EDS, especially in those with the EDSh subtype.
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Affiliation(s)
- Javiera Cancino
- Facultad de Odontología, Universidad Finis Terrae. Santiago, Chile. , Universidad Finis Terrae Facultad de Odontología Universidad Finis Terrae Santiago Chile
| | - Felipe Soto
- Escuela de Odontología, Universidad Mayor. Santiago, Chile. Universidad Mayor Escuela de Odontología Universidad Mayor Santiago Chile
| | - Sebastián Martinez
- Facultad de Odontología, Universidad del Desarrollo. Santiago, Chile. Universidad del Desarrollo Facultad de Odontología, Universidad del Desarrollo Santiago Chile
| | - Sergio Gutiérrez
- Facultad de Odontología, Universidad Finis Terrae. Santiago, Chile. , Universidad Finis Terrae Facultad de Odontología Universidad Finis Terrae Santiago Chile
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Gutiérrez S, Wellman GB, Lauersen KJ. Teaching an old ‘doc’ new tricks for algal biotechnology: Strategic filter use enables multi-scale fluorescent protein signal detection. Front Bioeng Biotechnol 2022; 10:979607. [PMID: 36213064 PMCID: PMC9540369 DOI: 10.3389/fbioe.2022.979607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 08/25/2022] [Indexed: 11/13/2022] Open
Abstract
Fluorescent proteins (FPs) are powerful reporters with a broad range of applications in gene expression and subcellular localization. High-throughput screening is often required to identify individual transformed cell lines in organisms that favor non-homologous-end-joining integration of transgenes into genomes, like in the model green microalga Chlamydomonas reinhardtii. Strategic transgene design, including genetic fusion of transgenes to FPs, and strain domestication have aided engineering efforts in this host but have not removed the need for screening large numbers of transformants to identify those with robust transgene expression levels. FPs facilitate transformant screening by providing a visual signal indicating transgene expression. However, limited combinations of FPs have been described in alga and inherent background fluorescence from cell pigments can hinder FP detection efforts depending on available infrastructure. Here, an updated set of algal nuclear genome-domesticated plasmid parts for seven FPs and six epitope tags were generated and tested in C. reinhardtii. Strategic filter selection was found to enable detection of up to five independent FPs signals from cyan to far-red separately from inherent chlorophyll fluorescence in live algae at the agar plate-level and also in protein electrophoresis gels. This work presents technical advances for algal engineering that can assist reporter detection efforts in other photosynthetic host cells or organisms with inherent background fluorescence.
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Gutiérrez S, Lauersen KJ. Gene Delivery Technologies with Applications in Microalgal Genetic Engineering. Biology (Basel) 2021; 10:265. [PMID: 33810286 PMCID: PMC8067306 DOI: 10.3390/biology10040265] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/18/2021] [Accepted: 03/24/2021] [Indexed: 12/28/2022]
Abstract
Microalgae and cyanobacteria are photosynthetic microbes that can be grown with the simple inputs of water, carbon dioxide, (sun)light, and trace elements. Their engineering holds the promise of tailored bio-molecule production using sustainable, environmentally friendly waste carbon inputs. Although algal engineering examples are beginning to show maturity, severe limitations remain in the transformation of multigene expression cassettes into model species and DNA delivery into non-model hosts. This review highlights common and emerging DNA delivery methods used for other organisms that may find future applications in algal engineering.
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Affiliation(s)
| | - Kyle J. Lauersen
- Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia;
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Fernández-Pérez S, Pérez-Andrés J, Gutiérrez S, Navasa N, Martínez-Blanco H, Ferrero MÁ, Vivas S, Vaquero L, Iglesias C, Casqueiro J, Rodríguez-Aparicio LB. The Human Digestive Tract Is Capable of Degrading Gluten from Birth. Int J Mol Sci 2020; 21:ijms21207696. [PMID: 33080976 PMCID: PMC7589136 DOI: 10.3390/ijms21207696] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/14/2020] [Accepted: 10/15/2020] [Indexed: 12/20/2022] Open
Abstract
The human gastrointestinal system has the capacity to metabolize dietary gluten. The capacity to degrade gliadin-derived peptide is present in humans from birth and increases during the first stages of life (up to 6–12 months of age). Fecal samples from 151 new-born and adult non-celiac disease (NCD) volunteers were collected, and glutenase and glianidase activities were evaluated. The capacity of total fecal proteins to metabolize 33-mer, 19-mer, and 13-mer gliadin peptides was also evaluated by high-performance liquid chromatography (HPLC). Feces from new-borns (meconium) showed glutenase and gliadinase activities, and peptidase activity against all three gliadin peptides. Maximal gluten degradative activity was observed in fecal samples from the youngest volunteers (0–12 months old). After the age of nine months, the gluten digestive capacity of gastrointestinal tract decreases and, from ±8 years old, individuals lose the ability to completely degrade toxic peptides. The gastrointestinal proteases involved in gluten digestion: elastase 2A, elastase 3B, and carboxipeptidase A1 are present from earlier stages of life. The human digestive tract contains the proteins capable of metabolizing gluten from birth, even before starting gluten intake. Humans are born with the ability to digest gluten and to completely degrade the potentially toxic gliadin-derived peptides (33-, 19-, and 13-mer).
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Affiliation(s)
- Silvia Fernández-Pérez
- Área de Bioquímica y Biología Molecular, Departamento de Biología Molecular, Facultad de Veterinaria, Universidad de León, 24071 León, Spain; (S.F.-P.); (S.G.); (N.N.); (H.M.-B.); (M.Á.F.)
- Instituto de Biología Molecular, Genómica y Proteómica (INBIOMIC), Universidad de León, 24071 León, Spain
| | - Jenifer Pérez-Andrés
- Área de Microbiología, Departamento de Biología Molecular, Facultad de Ciencias Biológicas y Ambientales, Universidad de León, 24071 León, Spain; (J.P.-A.); (J.C.)
- Instituto de Biología Molecular, Genómica y Proteómica (INBIOMIC), Universidad de León, 24071 León, Spain
| | - Sergio Gutiérrez
- Área de Bioquímica y Biología Molecular, Departamento de Biología Molecular, Facultad de Veterinaria, Universidad de León, 24071 León, Spain; (S.F.-P.); (S.G.); (N.N.); (H.M.-B.); (M.Á.F.)
- Instituto de Biología Molecular, Genómica y Proteómica (INBIOMIC), Universidad de León, 24071 León, Spain
| | - Nicolás Navasa
- Área de Bioquímica y Biología Molecular, Departamento de Biología Molecular, Facultad de Veterinaria, Universidad de León, 24071 León, Spain; (S.F.-P.); (S.G.); (N.N.); (H.M.-B.); (M.Á.F.)
- Instituto de Biología Molecular, Genómica y Proteómica (INBIOMIC), Universidad de León, 24071 León, Spain
| | - Honorina Martínez-Blanco
- Área de Bioquímica y Biología Molecular, Departamento de Biología Molecular, Facultad de Veterinaria, Universidad de León, 24071 León, Spain; (S.F.-P.); (S.G.); (N.N.); (H.M.-B.); (M.Á.F.)
- Instituto de Biología Molecular, Genómica y Proteómica (INBIOMIC), Universidad de León, 24071 León, Spain
| | - Miguel Ángel Ferrero
- Área de Bioquímica y Biología Molecular, Departamento de Biología Molecular, Facultad de Veterinaria, Universidad de León, 24071 León, Spain; (S.F.-P.); (S.G.); (N.N.); (H.M.-B.); (M.Á.F.)
- Instituto de Biología Molecular, Genómica y Proteómica (INBIOMIC), Universidad de León, 24071 León, Spain
| | - Santiago Vivas
- Servicio de Gastroenterología, Hospital Universitario de León, 24008 Léon, Spain; (S.V.); (L.V.); (C.I.)
- Instituto de Biomedicina (IBIOMED), Universidad de León, 24071 León, Spain
| | - Luis Vaquero
- Servicio de Gastroenterología, Hospital Universitario de León, 24008 Léon, Spain; (S.V.); (L.V.); (C.I.)
- Instituto de Biomedicina (IBIOMED), Universidad de León, 24071 León, Spain
| | - Cristina Iglesias
- Servicio de Gastroenterología, Hospital Universitario de León, 24008 Léon, Spain; (S.V.); (L.V.); (C.I.)
- Servicio de Pediatría, Hospital Universitario de León, 24008 Léon, Spain
| | - Javier Casqueiro
- Área de Microbiología, Departamento de Biología Molecular, Facultad de Ciencias Biológicas y Ambientales, Universidad de León, 24071 León, Spain; (J.P.-A.); (J.C.)
- Instituto de Biología Molecular, Genómica y Proteómica (INBIOMIC), Universidad de León, 24071 León, Spain
| | - Leandro B. Rodríguez-Aparicio
- Área de Bioquímica y Biología Molecular, Departamento de Biología Molecular, Facultad de Veterinaria, Universidad de León, 24071 León, Spain; (S.F.-P.); (S.G.); (N.N.); (H.M.-B.); (M.Á.F.)
- Instituto de Biología Molecular, Genómica y Proteómica (INBIOMIC), Universidad de León, 24071 León, Spain
- Correspondence: ; Tel.: +34-987-291227
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Navasa N, Ferrero MÁ, Rodríguez-Aparicio LB, Monteagudo-Mera A, Gutiérrez S, Martínez-Blanco H. The role of RcsA in the adaptation and survival of Escherichia coli K92. FEMS Microbiol Lett 2020; 366:5476499. [PMID: 31089698 DOI: 10.1093/femsle/fnz082] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 04/18/2019] [Indexed: 12/26/2022] Open
Abstract
The Rcs phosphorelay is a two-component signal transduction system that senses stressful environmental signals such as desiccation or low temperatures, which serve as natural inducers in bacteria. RcsA is an important coregulator in this system involved in some functions regulated by the Rcs system, including biofilm formation and capsule synthesis. In this sense, we previously showed that RcsA is necessary for colanic acid synthesis in Escherichia coli K92. Here, using an E. coli K92ΔrcsA mutant lacking rcsA gene we further characterize the implications of RcsA on E. coli K92 survival under osmotic and oxidative stressful conditions, and bacterial attachment and biofilm formation on both biotic and abiotic surfaces. Our results show that RcsA protects E. coli K92 against osmotic and, especially, oxidative stress at low temperatures. In addition, RcsA did not interfere in biofilm formation in any surface tested, including polystyrene, stainless steel, silicone, Teflon, aluminum and glass. By contrast, deletion of rcsA increased bacterial attachment to the caco-2 cells monolayer used as biotic surface.
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Affiliation(s)
- Nicolás Navasa
- Departamento de Biología Molecular, Área de Bioquímica y Biología Molecular, Universidad de León, Campus de Vegazana s/n, 24071 León, Spain
| | - Miguel Ángel Ferrero
- Departamento de Biología Molecular, Área de Bioquímica y Biología Molecular, Universidad de León, Campus de Vegazana s/n, 24071 León, Spain
| | - Leandro B Rodríguez-Aparicio
- Departamento de Biología Molecular, Área de Bioquímica y Biología Molecular, Universidad de León, Campus de Vegazana s/n, 24071 León, Spain
| | - Andrea Monteagudo-Mera
- Departamento de Biología Molecular, Área de Bioquímica y Biología Molecular, Universidad de León, Campus de Vegazana s/n, 24071 León, Spain
| | - Sergio Gutiérrez
- Departamento de Biología Molecular, Área de Bioquímica y Biología Molecular, Universidad de León, Campus de Vegazana s/n, 24071 León, Spain
| | - Honorina Martínez-Blanco
- Departamento de Biología Molecular, Área de Bioquímica y Biología Molecular, Universidad de León, Campus de Vegazana s/n, 24071 León, Spain
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Proctor RH, McCormick SP, Gutiérrez S. Genetic bases for variation in structure and biological activity of trichothecene toxins produced by diverse fungi. Appl Microbiol Biotechnol 2020; 104:5185-5199. [PMID: 32328680 DOI: 10.1007/s00253-020-10612-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [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: 02/28/2020] [Revised: 04/01/2020] [Accepted: 04/05/2020] [Indexed: 11/26/2022]
Abstract
Trichothecenes are sesquiterpene toxins produced by diverse but relatively few fungal species in at least three classes of Ascomycetes: Dothideomycetes, Eurotiomycetes, and Sordariomycetes. Approximately 200 structurally distinct trichothecene analogs have been described, but a given fungal species typically produces only a small subset of analogs. All trichothecenes share a core structure consisting of a four-ring nucleus known as 12,13-epoxytrichothec-9-ene. This structure can be substituted at various positions with hydroxyl, acyl, or keto groups to give rise to the diversity of trichothecene structures that has been described. Over the last 30 years, the genetic and biochemical pathways required for trichothecene biosynthesis in several species of the fungi Fusarium and Trichoderma have been elucidated. In addition, phylogenetic and functional analyses of trichothecene biosynthetic (TRI) genes from fungi in multiple genera have provided insights into how acquisition, loss, and changes in functions of TRI genes have given rise to the diversity of trichothecene structures. These analyses also suggest both divergence and convergence of TRI gene function during the evolutionary history of trichothecene biosynthesis. What has driven trichothecene structural diversification remains an unanswered question. However, insight into the role of trichothecenes in plant pathogenesis of Fusarium species and into plant glucosyltransferases that detoxify the toxins by glycosylating them point to a possible driver. Because the glucosyltransferases can have substrate specificity, changes in trichothecene structures produced by a fungus could allow it to evade detoxification by the plant enzymes. Thus, it is possible that advantages conferred by evading detoxification have contributed to trichothecene structural diversification. KEY POINTS : • TRI genes have evolved by diverse processes: loss, acquisition and changes in function. • Some TRI genes have acquired the same function by convergent evolution. • Some other TRI genes have evolved divergently to have different functions. • Some TRI genes were acquired or resulted from diversification in function of other genes. • Substrate specificity of plant glucosyltransferases could drive trichothecene diversity.
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Affiliation(s)
- R H Proctor
- United States Department of Agriculture, Mycotoxin Prevention and Applied Microbiology Research Unit, National Center for Agricultural Utilization Research, Peoria, IL, 61604-3902, USA.
| | - S P McCormick
- United States Department of Agriculture, Mycotoxin Prevention and Applied Microbiology Research Unit, National Center for Agricultural Utilization Research, Peoria, IL, 61604-3902, USA
| | - S Gutiérrez
- Area of Microbiology, University of León, Campus de Ponferrada, 24400, Ponferrada, Spain.
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Faraoni EY, Abeledo Machado AI, Pérez PA, Marcial López CA, Camilletti MA, Peña-Zanoni M, Rulli SB, Gutiérrez S, Díaz-Torga G. Activin-inhibitory action on lactotrophs is decreased in lactotroph hyperplasia. J Endocrinol 2020; 244:415-429. [PMID: 32395971 DOI: 10.1530/joe-19-0326] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/16/2019] [Indexed: 11/08/2022]
Abstract
Among all the hormone-secreting pituitary tumours, prolactinomas are the most frequently found in the clinic. Since dopamine is the primary inhibitor of lactotroph function, dopamine agonists represent the first-line therapy. However, a subset of patients exhibits resistance to these drugs, and therefore, alternative treatments are desired. As activins inhibit prolactin gene expression through the inhibition of Pit-1 involving the p38MAPK pathway, in the present work, we studied the local activin system as an alternative inhibitory system for lactotroph hyperplasia treatment. We used two different mouse models of prolactinoma: transgenic mice with overexpression of the human chorionic gonadotropin β-subunit (hCGβ) and mice lacking dopamine receptor type 2. In both models, females, but not males, develop lactotroph hyperplasia from the fourth month of life. We found reduced expression of pituitary activin subunits and activin receptors in hyperplastic pituitaries from both models compared with wild-type counterparts. Consequently, hyperplastic pituitaries presented a reduced activin-inhibitory action on prolactin secretion. Additionally, while female wild-type lactotrophs presented high levels of phospho-p38MAPK, it was lost in prolactinomas, concomitant with decreased activin expression, increased Pit-1 expression and tumour development. In contrast, male pituitaries express higher mRNA levels of activin subunits βA and βB, which would suggest a stronger activin inhibitory function on lactotrophs, protecting this sex from tumour development, despite genotype. The present results highlight the importance of the activin inhibitory action on lactotroph function and place the local activin system as a new target for the treatment of dopamine agonist-resistant prolactinomas.
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Affiliation(s)
- E Y Faraoni
- Instituto de Biología y Medicina Experimental (IBYME), CONICET, Buenos Aires, Argentina
| | - A I Abeledo Machado
- Instituto de Biología y Medicina Experimental (IBYME), CONICET, Buenos Aires, Argentina
| | - P A Pérez
- Centro de Microscopia Electrónica, Instituto de Investigaciones en Ciencias de la Salud (INICSA-CONICET), Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - C A Marcial López
- Instituto de Biología y Medicina Experimental (IBYME), CONICET, Buenos Aires, Argentina
| | - M A Camilletti
- Instituto de Biología y Medicina Experimental (IBYME), CONICET, Buenos Aires, Argentina
| | - M Peña-Zanoni
- Instituto de Biología y Medicina Experimental (IBYME), CONICET, Buenos Aires, Argentina
| | - S B Rulli
- Instituto de Biología y Medicina Experimental (IBYME), CONICET, Buenos Aires, Argentina
| | - S Gutiérrez
- Centro de Microscopia Electrónica, Instituto de Investigaciones en Ciencias de la Salud (INICSA-CONICET), Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - G Díaz-Torga
- Instituto de Biología y Medicina Experimental (IBYME), CONICET, Buenos Aires, Argentina
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Gutiérrez S. CORR Insights®: What Regions of the Distal Clavicle Have the Greatest Bone Mineral Density and Cortical Thickness? A Cadaveric Study. Clin Orthop Relat Res 2019; 477:2733-2734. [PMID: 31764343 PMCID: PMC6907306 DOI: 10.1097/corr.0000000000001021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 10/09/2019] [Indexed: 01/31/2023]
Affiliation(s)
- Sergio Gutiérrez
- S. Gutiérrez, Director, Innovation Department, Foundation for Orthopaedic Research and Education, Tampa, FL, USA
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Hernández-Gómez C, De La Cadena E, Mojica MF, Correa A, Perengüez M, Gutiérrez S, Pallares C, López C, Maria. Rojas Rojas M, Virginia Villegas M. 1581. Comparative In Vitro Activity of Ceftolozane/tazobactam and Comparator Agents Against Enterobacteriaceae and Pseudomonas Aeruginosa Clinical Isolates in Colombia. Open Forum Infect Dis 2019. [PMCID: PMC6809320 DOI: 10.1093/ofid/ofz360.1445] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Background Multidrug-resistant Enterobacteriaceae (Ent) and Pseudomonas aeruginosa (Pae) are involved in a considerable number of healthcare-associated infections, thus representing a therapeutic challenge. Ceftolozane–tazobactam (C/T) is a combination of a novel cephalosporin with a known β-lactamase inhibitor. Ceftolozane has high affinity for penicillin-binding proteins, improved outer membrane permeability, increased stability against efflux and enhanced stability against chromosomal AmpC β-lactamases compared with other β-lactam antibiotics. This agent is not active against carbapenemases. We evaluated the in vitro activity of C/T against clinical isolates of Ent and Pae collected from 2016- 2017 and compared it to the activity of broad-spectrum antimicrobial agents. Methods 1.644 Ent and Pae non-duplicate clinical isolates were collected in 13 medical centers located in 12 Colombian cities. Minimum inhibitory concentrations (MIC) were performed by broth microdilution and interpreted according to current CLSI guidelines. Isolates tested included 813 Escherichia coli (Eco), 441 Klebsiella pneumoniae (Kpn), 82 Enterobacter spp., (Enb); 60 Serratia marcescens (Sma) and 248 Pae. Comparator agents were ceftriaxone (CRO), cefotaxime (CTX), ceftazidime (CAZ), cefepime (FEP), piperacillin/tazobactam (TZP), ertapenem (ETP), imipenem (IMI), meropenem (MEM). Results Susceptibilities to C/T and comparators of 4 Ent species and Pae are shown in Table 1. Compared with other β-lactams such as CRO, CAZ, TZP, and FEP, C/T had considerably higher susceptibility rates against ESBL, non-carbapenem-resistant (CR) Eco and Kpn isolates. C/T MIC50/90 were: Eco (≤1/≤1); Kpn (≤1/128); Enb (≤1/64); Sma (≤1/≥256); Pae (≤1/≥256). In the case of P.aeruginosa despite the high resistance rates observed in the study, C/T had the best susceptibility, even higher than the carbapenems. Conclusion Overall, C/T demonstrated higher in vitro activity than currently available cephalosporins and TZP when tested against Ent and Pae. C/T provides an important treatment option against infections caused by non-carbapenemase producing Gram-negative pathogens. Further studies are warranted to identify an emerging mechanism of resistance in Colombia. ![]()
Disclosures All authors: No reported disclosures.
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Affiliation(s)
| | | | - Maria F Mojica
- Universidad El Bosque, Bogota, Distrito Capital de Bogota, Colombia
| | - Adriana Correa
- Universidad Santiago de Cali, Cali, Valle del Cauca, Colombia
| | - Marcela Perengüez
- Centro Internacional de Entrenamiento e Investigaciones Médicas, Cali, Valle del Cauca, Colombia
| | - Sergio Gutiérrez
- Centro Internacional de Entrenamiento e Investigaciones Médicas, Cali, Valle del Cauca, Colombia
| | | | - Catalina López
- MSD Colombia, Bogota, Distrito Capital de Bogota, Colombia
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González-Saldía RR, Pino-Maureira NL, Muñoz C, Soto L, Durán E, Barra MJ, Gutiérrez S, Díaz V, Saavedra A. Fecal pollution source tracking and thalassogenic diseases: The temporal-spatial concordance between maximum concentrations of human mitochondrial DNA in seawater and Hepatitis A outbreaks among a coastal population. Sci Total Environ 2019; 686:158-170. [PMID: 31176815 DOI: 10.1016/j.scitotenv.2019.05.415] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 05/13/2019] [Accepted: 05/27/2019] [Indexed: 05/25/2023]
Abstract
Fecal pollution source tracking (FST) studies the origin of fecal contamination and promotes action to eliminate it to improve human health and environmental sustainability. This work presents the temporal and spatial relations of human mitochondrial DNA (HmtDNA), fecal coliforms (FC) and live microbial biomass (ATP) in seawater during a hepatitis A outbreak among a human coastal population. The study area is approximately 100 km along the coastline of the Biobío Region in the southeastern Pacific (Humboldt Current System, Chile). Total data from the swash zone from summer 2015 to autumn 2016 show there were significant positive log-log correlations between FC and HmtDNA (R = 0.32) and ATP (R = 0.31). These correlations were highest during the austral spring of 2015 (R = 0.53 and 0.58 respectively), when HmtDNA also correlated significantly with ATP (R = 0.86). Maximum average values of the parameters measured in this season showed a temporal-spatial concordance with the peak in the number of hepatitis A cases among the nearby coastal population. FC correlated significantly with HmtDNA (R = 0.98) in the water column of the coastal zone close to Concepción Bay during the austral summer of 2016 and in the swash zone of the bay (R = 0.68) throughout the study period. Hepatitis A virus (HAV) has also been detected in organisms and seawater in Concepción Bay, which is consistent with the high incidence of hepatitis A among the coastal population. The concordance between human fecal pollution in the study area and a seasonal hepatitis A outbreak strongly suggests that HmtDNA and its relation with FC and ATP in the coastal zone of marine environments can be used as a proxy to evaluate the risk of outbreaks of thalassogenic diseases.
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Affiliation(s)
- R R González-Saldía
- Universidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Departamento de Oceanografía, Concepción 4070386, Chile; Universidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Doctorado en Ciencias con mención en Manejo de Recursos Acuáticos Renovables, Concepción 4070386, Chile; Universidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Centro de Investigación Oceanográfica COPAS Sur-Austral, Concepción 4070386, Chile; Universidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Ingeniería en Biotecnología Marina y Acuicultura, Concepción 4070386, Chile.
| | - N L Pino-Maureira
- Universidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Doctorado en Ciencias con mención en Manejo de Recursos Acuáticos Renovables, Concepción 4070386, Chile; Universidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Centro de Investigación Oceanográfica COPAS Sur-Austral, Concepción 4070386, Chile.
| | - Ch Muñoz
- Universidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Centro de Investigación Oceanográfica COPAS Sur-Austral, Concepción 4070386, Chile.
| | - L Soto
- Universidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Ingeniería en Biotecnología Marina y Acuicultura, Concepción 4070386, Chile.
| | - E Durán
- Universidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Ingeniería en Biotecnología Marina y Acuicultura, Concepción 4070386, Chile.
| | - M J Barra
- Universidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Centro de Investigación Oceanográfica COPAS Sur-Austral, Concepción 4070386, Chile.
| | - S Gutiérrez
- Universidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Centro de Investigación Oceanográfica COPAS Sur-Austral, Concepción 4070386, Chile.
| | - V Díaz
- Universidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Centro de Investigación Oceanográfica COPAS Sur-Austral, Concepción 4070386, Chile.
| | - A Saavedra
- Universidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Centro de Investigación Oceanográfica COPAS Sur-Austral, Concepción 4070386, Chile.
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Gutiérrez S, Correa A, Hernández-Gómez C, De La Cadena E, Pallares C, Villegas MV. Detection of carbapenemase-producing Pseudomonas aeruginosa: Evaluation of the carbapenem inactivation method (CIM). Enferm Infecc Microbiol Clin 2019; 37:648-651. [PMID: 30898368 DOI: 10.1016/j.eimc.2019.02.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 01/29/2019] [Accepted: 02/02/2019] [Indexed: 11/15/2022]
Abstract
INTRODUCTION The carbapenem inactivation method (CIM) is a cost-effective assay for detecting carbapenemases. However, its interpretation is unclear for Pseudomonas spp. We evaluate its accuracy when meropenem is changed to imipenem. METHODS We analyzed 266 P. aeruginosa isolates. The CIM method consists of: resuspend bacterial colonies (a full 10μL loop) in 400μL water, in which a 10μg disk of meropenem/imipenem is immersed. After 2h of incubation (35°C), remove the disk, place it onto a Mueller-Hinton agar plate previously inoculated with Escherichia coli (ATCC 25922), and incubate at 35 ̊C between 18-24 h. Interpretation criteria (mm of inhibition zone): ≤19mm, positive; ≥25mm negative; 20-24mm, undetermined. RESULTS Imipenem improves the sensitivity and specificity of CIM when compared to meropenem (99.4% and 98.9%, vs. 91.9% and 94.7%, respectively). CONCLUSIONS The accuracy of CIM for carbapenemase detection in P. aeruginosa is increased with the use of imipenem.
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Affiliation(s)
- Sergio Gutiérrez
- Bacterial Resistance and Hospital Epidemiology Unit, International Center for Medical Research and Training (CIDEIM), Cali, Colombia
| | - Adriana Correa
- Bacterial Resistance and Hospital Epidemiology Unit, International Center for Medical Research and Training (CIDEIM), Cali, Colombia; Universidad Santiago de Cali, Cali, Colombia
| | - Cristhian Hernández-Gómez
- Bacterial Resistance and Hospital Epidemiology Unit, International Center for Medical Research and Training (CIDEIM), Cali, Colombia; Grupo de Investigación en Resistencia Antimicrobiana y Epidemiología Hospitalaria - RAEH, Universidad El Bosque, Bogotá, Colombia
| | - Elsa De La Cadena
- Bacterial Resistance and Hospital Epidemiology Unit, International Center for Medical Research and Training (CIDEIM), Cali, Colombia; Grupo de Investigación en Resistencia Antimicrobiana y Epidemiología Hospitalaria - RAEH, Universidad El Bosque, Bogotá, Colombia
| | - Christian Pallares
- Bacterial Resistance and Hospital Epidemiology Unit, International Center for Medical Research and Training (CIDEIM), Cali, Colombia; Grupo de Investigación en Resistencia Antimicrobiana y Epidemiología Hospitalaria - RAEH, Universidad El Bosque, Bogotá, Colombia
| | - María Virginia Villegas
- Bacterial Resistance and Hospital Epidemiology Unit, International Center for Medical Research and Training (CIDEIM), Cali, Colombia; Grupo de Investigación en Resistencia Antimicrobiana y Epidemiología Hospitalaria - RAEH, Universidad El Bosque, Bogotá, Colombia.
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Aira JR, Simon P, Gutiérrez S, Santoni BG, Frankle MA. Morphometry of the human clavicle and intramedullary canal: A 3D, geometry-based quantification. J Orthop Res 2017; 35:2191-2202. [PMID: 28150886 DOI: 10.1002/jor.23533] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 01/23/2017] [Indexed: 02/04/2023]
Abstract
Midshaft clavicle fractures are a very common occurrence. The current treatment of choice involves internal fixation with superior or anterior clavicle plating, however their clinical success and particularly patient satisfaction are decreasing. The implementation of intramedullary devices is on the rise, but data describing the intramedullary canal parameters are lacking. The aim of this study is to quantify the geometry of the clavicle and its intramedullary canal, and to evaluate the effect of gender and anatomical side. This study used three-dimensional image-based models with novel and automated methods of standardization, normalization, and bone cross-section evaluation. The data obtained in this study present intramedullary canal, and clavicle diameter and center deviation parameterized as a function of clavicle length as well as its radius of curvature and true length. Results showed that both right-sided and female clavicles were shorter and thicker, but only females showed a statistically significant difference in size compared to males (p < 0.0001). The smallest clavicle and intramedullary canal diameters were seen at different clavicle lengths (45% and 52%), suggesting that the narrowest region of intramedullary canal cannot be appreciated based on external visualization of the clavicle alone. The narrowing of the intramedullary canal is of special interest because this is a potential limiting region for surgical planning and intramedullary device design. Furthermore, the location and value of maximum lateral curvature displacement is different in the intramedullary canal, implying there exists an eccentricity of the intramedullary canal center with respect to the clavicle center. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:2191-2202, 2017.
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Affiliation(s)
- Jazmine R Aira
- Department of Chemical & Biomedical Engineering, University of South Florida, Tampa, Florida
| | - Peter Simon
- Department of Chemical & Biomedical Engineering, University of South Florida, Tampa, Florida.,Phillip Spiegel Orthopaedic Research Laboratory, Foundation for Orthopaedic Research and Education, Tampa, Florida.,Department of Orthopaedics and Sport Medicine, University of South Florida, Tampa, Florida
| | - Sergio Gutiérrez
- Phillip Spiegel Orthopaedic Research Laboratory, Foundation for Orthopaedic Research and Education, Tampa, Florida.,Department of Orthopaedics and Sport Medicine, University of South Florida, Tampa, Florida
| | - Brandon G Santoni
- Phillip Spiegel Orthopaedic Research Laboratory, Foundation for Orthopaedic Research and Education, Tampa, Florida.,Department of Orthopaedics and Sport Medicine, University of South Florida, Tampa, Florida
| | - Mark A Frankle
- Department of Orthopaedics and Sport Medicine, University of South Florida, Tampa, Florida.,Florida Orthopaedic Institute, Shoulder and Elbow Service, 13020 N Telecom Pkwy, Tampa, Florida, 33637
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Carro-Huerga G, Mayo S, Rodríguez-González Á, Suárez Villanueva V, González-López Ó, Gutiérrez S, Casquero PA. In vitro effects of Trichoderma secondary metabolites on Phaeoacremonium aleophilum. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- G Carro-Huerga
- Research Group of Engineering and Sustainable Agriculture, Research Institute of Environment, Natural Resources and Biodiversity, Universidad de León, Leon, Spain
| | - S Mayo
- Research Group of Engineering and Sustainable Agriculture, Research Institute of Environment, Natural Resources and Biodiversity, Universidad de León, Leon, Spain
| | - Á Rodríguez-González
- Research Group of Engineering and Sustainable Agriculture, Research Institute of Environment, Natural Resources and Biodiversity, Universidad de León, Leon, Spain
| | - V Suárez Villanueva
- Research Group of Engineering and Sustainable Agriculture, Research Institute of Environment, Natural Resources and Biodiversity, Universidad de León, Leon, Spain
| | - Ó González-López
- Research Group of Engineering and Sustainable Agriculture, Research Institute of Environment, Natural Resources and Biodiversity, Universidad de León, Leon, Spain
| | - S Gutiérrez
- Research Group of Engineering and Sustainable Agriculture, Area of Microbiology, University School of Agricultural Engineers, Universidad de León, Ponferrada, Spain
| | - PA Casquero
- Research Group of Engineering and Sustainable Agriculture, Research Institute of Environment, Natural Resources and Biodiversity, Universidad de León, Leon, Spain
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Rodríguez-González Á, Suárez Villanueva V, Mayo S, Carro-Huerga G, González-López Ó, Gutiérrez S, Peláez H, Casquero PA. Control of Xylotrechus arvicola (Coleoptera: Cerambycidae) larvae population by inoculating Trichoderma spp. in vine wood. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Á Rodríguez-González
- Research Group of Engineering and Sustainable Agriculture, Research Institute of Environment, Natural Resources and Biodiversity, Universidad de León, Leon, Spain
| | - V Suárez Villanueva
- Research Group of Engineering and Sustainable Agriculture, Research Institute of Environment, Natural Resources and Biodiversity, Universidad de León, Leon, Spain
| | - S Mayo
- Research Group of Engineering and Sustainable Agriculture, Research Institute of Environment, Natural Resources and Biodiversity, Universidad de León, Leon, Spain
| | - G Carro-Huerga
- Research Group of Engineering and Sustainable Agriculture, Research Institute of Environment, Natural Resources and Biodiversity, Universidad de León, Leon, Spain
| | - Ó González-López
- Research Group of Engineering and Sustainable Agriculture, Research Institute of Environment, Natural Resources and Biodiversity, Universidad de León, Leon, Spain
| | - S Gutiérrez
- Area of Microbiology, University School of Agricultural Engineers, Universidad de León, Ponferrada Campus, Av. Astorga s/n, 24401, Ponferrada, Spain
| | - H Peláez
- Freelance, Vicente Aleixandre 24, 47008, Valladolid, Spain
| | - PA Casquero
- Research Group of Engineering and Sustainable Agriculture, Research Institute of Environment, Natural Resources and Biodiversity, Universidad de León, Leon, Spain
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Abstract
INTRODUCTION Enterobacteriaceae, Pseudomonas spp., and Acinetobacter spp. infections are major causes of morbidity and mortality, especially due to the emergence and spread of β-lactamases. Carbapenemases, which are β-lactamases with the capacity to hydrolyze or inactivate carbapenems, have become a serious concern as they have the largest hydrolytic spectrum and therefore limit the utility of most β-lactam antibiotics. Areas covered: Here, we present an update of the current status of carbapenemases in Latin America and the Caribbean. Expert commentary: The increased frequency of reports on carbapenemases in Latin America and the Caribbean shows that they have successfully spread and have even become endemic in some countries. Countries such as Brazil, Colombia, Argentina, and Mexico account for the majority of these reports. Early suspicion and detection along with implementation of antimicrobial stewardship programs in all healthcare settings are crucial for the control and prevention of carbapenemase-producing bacteria.
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Affiliation(s)
- Kevin Escandón-Vargas
- a Bacterial Resistance and Hospital Epidemiology Unit , International Center for Medical Research and Training (CIDEIM) , Cali , Colombia
| | - Sergio Reyes
- a Bacterial Resistance and Hospital Epidemiology Unit , International Center for Medical Research and Training (CIDEIM) , Cali , Colombia
| | - Sergio Gutiérrez
- a Bacterial Resistance and Hospital Epidemiology Unit , International Center for Medical Research and Training (CIDEIM) , Cali , Colombia
| | - María Virginia Villegas
- a Bacterial Resistance and Hospital Epidemiology Unit , International Center for Medical Research and Training (CIDEIM) , Cali , Colombia.,b Molecular Genetics and Antimicrobial Resistance Unit, International Center for Microbial Genomics , Universidad El Bosque , Bogotá , Colombia
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Ferrari A, Gutiérrez S, Sin G. Modeling a production scale milk drying process: parameter estimation, uncertainty and sensitivity analysis. Chem Eng Sci 2016. [DOI: 10.1016/j.ces.2016.06.019] [Citation(s) in RCA: 7] [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: 10/21/2022]
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Viveros ME, Areán C, Gutiérrez S, Vázquez S, Cardiel MH, Taboada A, Marín G, Solorio R, García N. Evaluation of clopidogrel response variability and identification of the CYP2C19 polymorphism in Mexican patients. Arch Cardiol Mex 2016; 86:297-304. [PMID: 26971130 DOI: 10.1016/j.acmx.2016.01.007] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 01/21/2016] [Accepted: 01/28/2016] [Indexed: 10/22/2022] Open
Abstract
OBJECTIVE Drug inhibition of platelet P2Y12 adenosine diphosphate receptor has reduced the incidence of adverse cardiovascular events after percutaneous coronary interventions. The analysis of the phosphorylation status of vasodilator-stimulated phosphoprotein by flow cytometry has shown a predictive value for adverse events and stent thrombosis. Polymorphisms of CYP2C19 in high risk patients may also relate to adverse cardiovascular events. METHODS Ninety patients were enrolled. Patients received a 600mg clopidogrel loading dose. Blood samples were obtained at the time of the procedure and 24h later, platelet reactivity was assessed by vasodilator-stimulated phosphoprotein phosphorylation measurement using flow cytometry. Low response to clopidogrel was defined as a platelet reactivity index≥50%. The presence of CYP2C19*2 was identified with the restriction enzyme SmaI. RESULTS Mean platelet reactivity index: 53.45±22.48% in the baseline sample and 57.14±23.08% at 24h (p=0.183); 40% of patients behaved as good responders, the rest behaved as non-responders with 38% of patients showing platelet reactivity indexes between 50-70% and 22% showing indexes above 70%. The CYP2C19*2 polymorphism was found in 17% of patients, with a 3.9% AA homozygous genotype carriers. CONCLUSION Response to the clopidogrel loading dose showed a wide variability among patients with 40% responding to the drug according to previously established cut-off values. Our results showed that 3.9% of patients show the AA genotype. To our knowledge, this is the first study involving clopidogrel response by flow citometry and genotype typification in Mexican Mestizo population.
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Affiliation(s)
- Martha Eva Viveros
- División de Estudios de Posgrado, Facultad de Ciencias Médicas y Biológicas Dr. Ignacio Chávez, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico.
| | - Carlos Areán
- Servicio de Cardiología Intervencionista, Hospital General Dr. Miguel Silva, Morelia, Michoacán, Mexico
| | - Sergio Gutiérrez
- División de Estudios de Posgrado, Facultad de Ciencias Médicas y Biológicas Dr. Ignacio Chávez, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
| | - Soledad Vázquez
- División de Estudios de Posgrado, Facultad de Ciencias Médicas y Biológicas Dr. Ignacio Chávez, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
| | - Mario Humberto Cardiel
- Unidad de Investigación Dr. Mario Alvizouri, Hospital General Dr. Miguel Silva, Morelia, Michoacán, Mexico
| | - Alejandra Taboada
- División de Estudios de Posgrado, Facultad de Ciencias Médicas y Biológicas Dr. Ignacio Chávez, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
| | - Gissela Marín
- División de Estudios de Posgrado, Facultad de Ciencias Médicas y Biológicas Dr. Ignacio Chávez, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
| | - Ruben Solorio
- Servicio de Cardiología Intervencionista, Hospital General Dr. Miguel Silva, Morelia, Michoacán, Mexico
| | - Nalley García
- División de Estudios de Posgrado, Facultad de Ciencias Médicas y Biológicas Dr. Ignacio Chávez, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
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Gutiérrez S, Martínez-Blanco H, Rodríguez-Aparicio LB, Ferrero MA. Effect of fermented broth from lactic acid bacteria on pathogenic bacteria proliferation. J Dairy Sci 2016; 99:2654-2665. [PMID: 26851857 DOI: 10.3168/jds.2015-10439] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 12/18/2015] [Indexed: 02/04/2023]
Abstract
In this study, the effect that 5 fermented broths of lactic acid bacteria (LAB) strains have on the viability or proliferation and adhesion of 7 potentially pathogenic microorganisms was tested. The fermented broth from Lactococcus lactis C660 had a growth inhibitory effect on Escherichia coli K92 that reached of 31%, 19% to Pseudomonas fluorescens, and 76% to Staphylococcus epidermidis. The growth of Staph. epidermidis was negatively affected to 90% by Lc. lactis 11454 broth, whereas the growth of P. fluorescens (25%) and both species of Staphylococcus (35% to Staphylococcus aureus and 76% to Staph. epidermidis) were inhibited when they were incubated in the presence of Lactobacillus casei 393 broth. Finally, the fermented broth of Lactobacillus rhamnosus showed an inhibitory effect on growth of E. coli K92, Listeria innocua, and Staph. epidermidis reached values of 12, 28, and 76%, respectively. Staphylococcus epidermidis was the most affected strain because the effect was detected from the early stages of growth and it was completely abolished. The results of bacterial adhesion revealed that broths from Lc. lactis strains, Lactobacillus paracasei, and Lb. rhamnosus caused a loss of E. coli K92 adhesion. Bacillus cereus showed a decreased of adhesion in the presence of the broths of Lc. lactis strains and Lb. paracasei. Listeria innocua adhesion inhibition was observed in the presence of Lb. paracasei broth, and the greatest inhibitory effect was registered when this pathogenic bacterium was incubated in presence of Lc. lactis 11454 broth. With respect to the 2 Pseudomonas, we observed a slight adhesion inhibition showed by Lactobacillus rhamnosus broth against Pseudomonas putida. These results confirm that the effect caused by the different LAB assayed is also broth- and species-specific and reveal that the broth from LAB tested can be used as functional bioactive compounds to regulate the adhesion and biofilm synthesis and ultimately lead to preventing food and clinical contamination and colonization of E. coli K92, B. cereus, and Ls. innocua.
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Affiliation(s)
- S Gutiérrez
- Departamento de Biología Molecular, Facultad de Veterinaria, Universidad de León, 24071 León, Spain
| | - H Martínez-Blanco
- Departamento de Biología Molecular, Facultad de Veterinaria, Universidad de León, 24071 León, Spain; Instituto de Biología Molecular, Genómica y Proteómica (INBIOMIC), Universidad de León, 24071 León, Spain
| | - L B Rodríguez-Aparicio
- Departamento de Biología Molecular, Facultad de Veterinaria, Universidad de León, 24071 León, Spain; Instituto de Biología Molecular, Genómica y Proteómica (INBIOMIC), Universidad de León, 24071 León, Spain
| | - M A Ferrero
- Departamento de Biología Molecular, Facultad de Veterinaria, Universidad de León, 24071 León, Spain; Instituto de Biología Molecular, Genómica y Proteómica (INBIOMIC), Universidad de León, 24071 León, Spain.
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Malmierca MG, McCormick SP, Cardoza RE, Monte E, Alexander NJ, Gutiérrez S. Trichodiene Production in a Trichoderma harzianum erg1-Silenced Strain Provides Evidence of the Importance of the Sterol Biosynthetic Pathway in Inducing Plant Defense-Related Gene Expression. Mol Plant Microbe Interact 2015; 28:1181-1197. [PMID: 26168138 DOI: 10.1094/mpmi-06-15-0127-r] [Citation(s) in RCA: 14] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Trichoderma species are often used as biocontrol agents against plant-pathogenic fungi. A complex molecular interaction occurs among the biocontrol agent, the antagonistic fungus, and the plant. Terpenes and sterols produced by the biocontrol fungus have been found to affect gene expression in both the antagonistic fungus and the plant. The terpene trichodiene (TD) elicits the expression of genes related to tomato defense and to Botrytis virulence. We show here that TD itself is able to induce the expression of Botrytis genes involved in the synthesis of botrydial (BOT) and also induces terpene gene expression in Trichoderma spp. The terpene ergosterol, in addition to its role as a structural component of the fungal cell membranes, acts as an elicitor of defense response in plants. In the present work, using a transformant of T. harzianum, which is silenced in the erg1 gene and accumulates high levels of squalene, we show that this ergosterol precursor also acts as an important elicitor molecule of tomato defense-related genes and induces Botrytis genes involved in BOT biosynthesis, in both cases, in a concentration-dependent manner. Our data emphasize the importance of a balance of squalene and ergosterol in fungal interactions as well as in the biocontrol activity of Trichoderma spp.
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Affiliation(s)
- M G Malmierca
- 1 Area of Microbiology, Universitary School of Agricultural Engineers, University of León, Campus de Ponferrada. Avda, Astorga s/n, 24400 Ponferrada, Spain
| | - S P McCormick
- 2 Bacterial Foodborne Pathogen and Mycology Unit, USDA/ARS, National Center for Agricultural Utilization Research, Peoria, IL 61604-3902, U.S.A
| | - R E Cardoza
- 1 Area of Microbiology, Universitary School of Agricultural Engineers, University of León, Campus de Ponferrada. Avda, Astorga s/n, 24400 Ponferrada, Spain
| | - E Monte
- 3 Spanish-Portuguese Centre of Agricultural Research (CIALE), Department of Microbiology and Genetics, University of Salamanca, 37185 Salamanca, Spain
| | - N J Alexander
- 2 Bacterial Foodborne Pathogen and Mycology Unit, USDA/ARS, National Center for Agricultural Utilization Research, Peoria, IL 61604-3902, U.S.A
| | - S Gutiérrez
- 1 Area of Microbiology, Universitary School of Agricultural Engineers, University of León, Campus de Ponferrada. Avda, Astorga s/n, 24400 Ponferrada, Spain
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22
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Astarita G, Gutiérrez S, Kogovsek N, Mormandi E, Otero P, Calabrese C, Alcaraz G, Vázquez A, Abalovich M. False positive in the measurement of thyroglobulin induced by rheumatoid factor. Clin Chim Acta 2015; 447:43-6. [PMID: 25979693 DOI: 10.1016/j.cca.2015.04.039] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 04/07/2015] [Accepted: 04/29/2015] [Indexed: 10/23/2022]
Abstract
BACKGROUND We report a case of interference in thyroglobulin (Tg) measurement in a woman with differentiated thyroid cancer and rheumatoid arthritis history. Due to discordant Tg in relation to TSH concentrations and negative images, we investigated possible interference in the measurement of Tg. METHODS During the follow-up we measured Tg by chemiluminescence (TgQL) using Immulite 2000 immunoassay system. To investigate possible interference in Tg measurement, we made serial dilutions, re-testing of Tg by an alternative method: electrochemiluminescence, Cobas 6000 analyzer (TgEQL), recovery test of Tg and polyethylene glycol (PEG) 6000 precipitation. RESULTS During the patient follow-up, the TgQL ranged between <0.3 and 16.1ng/ml. In the evaluated serum samples very high titers of rheumatoid factor (RF) were found. When RF titers were lowered post PEG precipitation, Tg QL concentrations became undetectable. CONCLUSION We describe an unusual case of interference in Tg assay due to RF. When disagreement among Tg concentrations, images and clinical features is observed, we suggest taking into account the evaluation of possible Tg interference to avoid unnecessary complementary exams and inappropriate treatment.
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Affiliation(s)
- G Astarita
- Endocrinology Division, Durand Hospital, Buenos Aires, Argentina..
| | - S Gutiérrez
- Endocrinology Division, Durand Hospital, Buenos Aires, Argentina
| | - N Kogovsek
- Endocrinology Division, Durand Hospital, Buenos Aires, Argentina
| | - E Mormandi
- Endocrinology Division, Durand Hospital, Buenos Aires, Argentina
| | - P Otero
- Endocrinology Division, Durand Hospital, Buenos Aires, Argentina
| | - C Calabrese
- Endocrinology Division, Durand Hospital, Buenos Aires, Argentina
| | - G Alcaraz
- Endocrinology Division, Durand Hospital, Buenos Aires, Argentina
| | - A Vázquez
- Endocrinology Division, Durand Hospital, Buenos Aires, Argentina
| | - M Abalovich
- Endocrinology Division, Durand Hospital, Buenos Aires, Argentina
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23
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Pedemonte JC, Vargas R, Castillo V, Hodali T, Gutiérrez S, Tapia G, Castillo I, Videla LA, Fernández V. A combined iron and thyroid hormone protocol suppresses ischemia–reperfusion injury in rat livers. RSC Adv 2015. [DOI: 10.1039/c4ra15863f] [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: 11/21/2022] Open
Abstract
Liver preconditioning (PC) against ischemia–reperfusion (IR) injury is attained by iron (Fe) or thyroid hormone (T3) administration.
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Affiliation(s)
- J. C. Pedemonte
- Program of Molecular and Clinical Pharmacology
- Institute of Biomedical Sciences
- Faculty of Medicine
- University of Chile
- Santiago
| | - R. Vargas
- Program of Molecular and Clinical Pharmacology
- Institute of Biomedical Sciences
- Faculty of Medicine
- University of Chile
- Santiago
| | - V. Castillo
- Program of Molecular and Clinical Pharmacology
- Institute of Biomedical Sciences
- Faculty of Medicine
- University of Chile
- Santiago
| | - T. Hodali
- Program of Molecular and Clinical Pharmacology
- Institute of Biomedical Sciences
- Faculty of Medicine
- University of Chile
- Santiago
| | - S. Gutiérrez
- Program of Molecular and Clinical Pharmacology
- Institute of Biomedical Sciences
- Faculty of Medicine
- University of Chile
- Santiago
| | - G. Tapia
- Program of Molecular and Clinical Pharmacology
- Institute of Biomedical Sciences
- Faculty of Medicine
- University of Chile
- Santiago
| | - I. Castillo
- School of Medicine
- Faculty of Medicine
- Catholic University of Talca
- Chile
| | - L. A. Videla
- Program of Molecular and Clinical Pharmacology
- Institute of Biomedical Sciences
- Faculty of Medicine
- University of Chile
- Santiago
| | - V. Fernández
- Program of Molecular and Clinical Pharmacology
- Institute of Biomedical Sciences
- Faculty of Medicine
- University of Chile
- Santiago
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24
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Cardoza R, Malmierca M, Gutiérrez S. Overexpression of erg1
gene in Trichoderma harzianum
CECT 2413: effect on the induction of tomato defence-related genes. J Appl Microbiol 2014; 117:812-23. [DOI: 10.1111/jam.12574] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 05/20/2014] [Accepted: 06/05/2014] [Indexed: 11/28/2022]
Affiliation(s)
- R.E. Cardoza
- Area of Microbiology; Universitary School of Agricultural Engineers; University of León; Ponferrada Spain
| | - M.G. Malmierca
- Area of Microbiology; Universitary School of Agricultural Engineers; University of León; Ponferrada Spain
| | - S. Gutiérrez
- Area of Microbiology; Universitary School of Agricultural Engineers; University of León; Ponferrada Spain
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25
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Cabezas AF, Gutiérrez S, Teusink MJ, Schwartz DG, Hartzler RU, Santoni BG, Frankle MA. Kinematic impact of size on the existing glenohumeral joint in patients undergoing reverse shoulder arthroplasty. Clin Biomech (Bristol, Avon) 2014; 29:622-8. [PMID: 24874642 DOI: 10.1016/j.clinbiomech.2014.04.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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] [Received: 01/10/2014] [Revised: 03/24/2014] [Accepted: 04/30/2014] [Indexed: 02/07/2023]
Abstract
BACKGROUND Glenohumeral relationships in reverse shoulder arthroplasty patients have not been previously reported. The purpose of this study was to quantify and compare the shoulder spatial relationships and moment arms. Measurements were used to define general size categories and determine if sizes scale linearly for all metrics. METHODS Ninety-two shoulders of patients undergoing primary reverse shoulder arthroplasty for functionally-deficient massive rotator cuff tear without bony deformity or deficiency were evaluated using three-dimensional CT reconstructions and computer-aided design software. Multiple glenohumeral relationships (including moment arm) were measured and evaluated for size stratification and linearity. Generalized linear modeling was used to investigate how predictive glenoid height, coronal humeral head diameter, and gender were of greater tuberosity positions. FINDINGS The 92 shoulders were grouped based on glenoid height: small (<33.4mm), medium (33.4-38.0mm), and large (>38.0mm). All relationships varied between groups. The humeral head size, glenoid width, lateral offset, and moment arm all independently increased linearly (r(2)≥0.92) but the rate of increase varied (slope range: 0.59-1.92). Glenoid height, coronal humeral head diameter and gender predicted the greater tuberosity position within mean 1.09mm (standard deviation (SD) 0.84mm) of actual position in 90% of the population. INTERPRETATION Distinct groups exist based on the size of the glenoid in shoulder arthroplasty patients. Shoulder modeling should account for size groups, sex, and non-uniform linear scaling of morphometric parameters. Prediction of the greater tuberosity offset can be made using sex and size parameters. Clinical implications include appropriate prosthetic size selection and avoiding large deviations in non-anatomic reconstructions.
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Affiliation(s)
- Andres F Cabezas
- Phillip Spiegel Orthopaedic Research Laboratory, Foundation for Orthopaedic Research and Education, Tampa, FL 33637, USA
| | - Sergio Gutiérrez
- Phillip Spiegel Orthopaedic Research Laboratory, Foundation for Orthopaedic Research and Education, Tampa, FL 33637, USA
| | - Matthew J Teusink
- University of Nebraska Medical Center, 981080 Nebraska Medical Center, Omaha, NE 68198, USA
| | - Daniel G Schwartz
- The Sports Medicine Clinic, 10330 Meridian Ave. N, Suite 300, Seattle, WA 98133, USA
| | - Robert U Hartzler
- Florida Orthopaedic Institute, 13020 N Telecom Pkwy, Tampa, FL 33637, USA
| | - Brandon G Santoni
- Phillip Spiegel Orthopaedic Research Laboratory, Foundation for Orthopaedic Research and Education, Tampa, FL 33637, USA
| | - Mark A Frankle
- Florida Orthopaedic Institute, 13020 N Telecom Pkwy, Tampa, FL 33637, USA.
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26
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de Luis DA, de la Fuente B, Izaola O, Aller R, Gutiérrez S, Morillo M. Double blind randomized clinical trial controlled by placebo with a fos enriched cookie on saciety and cardiovascular risk factors in obese patients. NUTR HOSP 2014; 28:78-85. [PMID: 23808433 DOI: 10.3305/nh.2013.28.1.6255] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
INTRODUCTION It is essential to determine which snack foods are most affective for appetite control. The objective of the current study was to assess the responses of two different cookies on satiety and cardiovascular risk factors. MATERIAL AND METHODS 38 patients were randomized: group I (FOS enriched cookie, n=19) and group II (control cookie, n=19). Previous and after 1 month , the subjects rated their feelings of satiety/hunger with a test meal of 5 cookies. RESULTS After the test meal, the basal area under curve of the first hunger/satiety score was higher with satiety cookie than with control cookie, the data after 1 month of treatment was higher with satiety cookie than with control cookie, too. The score was higher than the fasting level for 20 minutes with satiety cookie and for 40 minutes with the same cookie, too. In satiety group, these scores (20 min and 40 min) were higher than control group before and after 1 month of treatment. The results were in the same way with the 100 mm 5-point visual satiety scale. Cardiovascular risk factors and dietary intake remained unchanged after dietary intervention. CONCLUSION A FOS enriched cookie produced greater ratings of satiety than a control cookie, without effects on cardiovascular risk factors or dietary intakes.
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Affiliation(s)
- D A de Luis
- Facultad de Medicina y Unidad de Apoyo a la Investigación, Instituto de Endocrinología y Nutrición, Hospital Río Hortega, Universidad de Valladolid, Simancas, Valladolid.
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27
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Morán A, Gutiérrez S, Martínez-Blanco H, Ferrero MA, Monteagudo-Mera A, Rodríguez-Aparicio LB. Non-toxic plant metabolites regulate Staphylococcus viability and biofilm formation: a natural therapeutic strategy useful in the treatment and prevention of skin infections. Biofouling 2014; 30:1175-1182. [PMID: 25397362 DOI: 10.1080/08927014.2014.976207] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In the present study, the efficacy of generally recognised as safe (GRAS) antimicrobial plant metabolites in regulating the growth of Staphylococcus aureus and S. epidermidis was investigated. Thymol, carvacrol and eugenol showed the strongest antibacterial action against these microorganisms, at a subinhibitory concentration (SIC) of ≤ 50 μg ml(-1). Genistein, hydroquinone and resveratrol showed antimicrobial effects but with a wide concentration range (SIC = 50-1,000 μg ml(-1)), while catechin, gallic acid, protocatechuic acid, p-hydroxybenzoic acid and cranberry extract were the most biologically compatible molecules (SIC ≥ 1000 μg ml(-1)). Genistein, protocatechuic acid, cranberry extract, p-hydroxybenzoic acid and resveratrol also showed anti-biofilm activity against S. aureus, but not against S. epidermidis in which, surprisingly, these metabolites stimulated biofilm formation (between 35% and 1,200%). Binary combinations of cranberry extract and resveratrol with genistein, protocatechuic or p-hydroxibenzoic acid enhanced the stimulatory effect on S. epidermidis biofilm formation and maintained or even increased S. aureus anti-biofilm activity.
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Affiliation(s)
- A Morán
- a Departamento de Biología Molecular, Facultad de Veterinaria , Universidad de León , León , Spain
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28
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Pérez-Gallardo RV, Briones LS, Díaz-Pérez AL, Gutiérrez S, Rodríguez-Zavala JS, Campos-García J. Reactive oxygen species production induced by ethanol in Saccharomyces cerevisiae increases because of a dysfunctional mitochondrial iron-sulfur cluster assembly system. FEMS Yeast Res 2013; 13:804-19. [PMID: 24028658 DOI: 10.1111/1567-1364.12090] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 08/27/2013] [Accepted: 09/03/2013] [Indexed: 11/27/2022] Open
Abstract
Ethanol accumulation during fermentation contributes to the toxic effects in Saccharomyces cerevisiae, impairing its viability and fermentative capabilities. The iron-sulfur (Fe-S) cluster biogenesis is encoded by the ISC genes. Reactive oxygen species (ROS) generation is associated with iron release from Fe-S-containing enzymes. We evaluated ethanol toxicity, ROS generation, antioxidant response and mitochondrial integrity in S. cerevisiae ISC mutants. These mutants showed an impaired tolerance to ethanol. ROS generation increased substantially when ethanol accumulated at toxic concentrations under the fermentation process. At the cellular and mitochondrial levels, ROS were increased in yeast treated with ethanol and increased to a higher level in the ssq1∆, isa1∆, iba57∆ and grx5∆ mutants - hydrogen peroxide and superoxide were the main molecules detected. Additionally, ethanol treatment decreased GSH/GSSG ratio and increased catalase activity in the ISC mutants. Examination of cytochrome c integrity indicated that mitochondrial apoptosis was triggered following ethanol treatment. The findings indicate that the mechanism of ethanol toxicity occurs via ROS generation dependent on ISC assembly system functionality. In addition, mutations in the ISC genes in S. cerevisiae contribute to the increase in ROS concentration at the mitochondrial and cellular level, leading to depletion of the antioxidant responses and finally to mitochondrial apoptosis.
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Affiliation(s)
- Rocio V Pérez-Gallardo
- Lab de Biotecnología Microbiana, Instituto de Investigaciones Químico-Biológicas, Morelia, Michoacán, México
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29
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Nakamura K, Akanuma K, Chiba M, Kumai K, Oonuma J, Kasai M, Kato Y, Nakai M, Nakatsuka M, Gutiérrez S, Seki T, Meguro K. P3–153: Impaired risk cognition and post‐disaster coping behavior among the old‐old population in the community: The Tome Project—A preliminary study. Alzheimers Dement 2013. [DOI: 10.1016/j.jalz.2013.05.1225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Kei Nakamura
- Tohoku University Graduate School of Medicine Miyagi Japan
| | - Kyoko Akanuma
- Tohoku University Graduate School of Medicine Sendai Japan
| | - Masanori Chiba
- Tohoku University Graduate School of Medicine Miyagi Japan
| | - Keiichi Kumai
- Tohoku University Graduate School of Medicine Miyagi Japan
| | - Jiro Oonuma
- Tohoku University Graduate School of Medicine Miyagi Japan
| | - Mari Kasai
- Tohoku University Graduate School of Medicine Sendai Japan
| | - Yuriko Kato
- Tohoku University Graduate School of Medicine Sendai Japan
| | - Megumi Nakai
- Tohoku University Graduate School of Medicine Sendai Japan
| | | | | | - Takashi Seki
- Tohoku University Graduate School of Medicine Miyagi Japan
| | - Kenichi Meguro
- Tohoku University Graduate School of Medicine Sendai Japan
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30
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Virani NA, Cabezas A, Gutiérrez S, Santoni BG, Otto R, Frankle M. Reverse shoulder arthroplasty components and surgical techniques that restore glenohumeral motion. J Shoulder Elbow Surg 2013; 22:179-87. [PMID: 22621793 DOI: 10.1016/j.jse.2012.02.004] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 02/02/2012] [Accepted: 02/21/2012] [Indexed: 02/01/2023]
Abstract
BACKGROUND Modifications in reverse shoulder arthroplasty (RSA) have been made with the intent of maximizing motion, although there is little objective evidence outlining their benefit. This study investigated the RSA component combinations that impart the greatest effect on impingement-free glenohumeral motion. METHODS A previously validated virtual shoulder model was implanted with RSA components that varied by humeral implant type (inset/onset), glenosphere diameter (30, 36, and 42 mm), glenosphere placement (inferior/neutral), glenosphere center-of-rotation offset (0, 5, and 10 mm), humeral neck-shaft angle (130° and 150°), and humeral offset (zero, five, and ten mm). Motion was simulated in all technique combinations until the point of impingement in abduction, flexion/extension (F/E), and internal/external rotation (IR/ER). Regression analysis was used to rank combinations based on motion. RESULTS Of 216 possible study combinations, 126 constructs (58%) demonstrated no arm-at-side impingement and were included for analysis. Models with the largest motion in abduction, F/E, and IR/ER, respectively, were inset-42-inferior-10-150-zero (107°), inset-36-inferior-10-130-five (146°), and inset-42-inferior-10-130-ten (121°). Humeral neck-shaft angle, glenosphere center-of-rotation offset, glenosphere placement, and glenosphere diameter had a significant effect on motion in all planes tested. Of these variables, humeral neck-shaft angle was most predictive of a change in abduction and F/E motion, whereas glenosphere placement was most predictive of a change in IR/ER motion. CONCLUSION Higher glenosphere center-of-rotation offsets led to an increase in motion in all planes. To maximize motion in abduction, a valgus humeral component should be selected; to maximize F/E, a varus humeral component should be selected; and, to maximize IR/ER, the glenosphere should be placed inferiorly.
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Affiliation(s)
- Nazeem A Virani
- Phillip Spiegel Orthopaedic Research Laboratory, Foundation for Orthopedic Research and Education, Tampa, FL, USA
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31
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de Luis DA, de la Fuente B, Izaola O, Conde R, Gutiérrez S, Morillo M, Teba Torres C. Double blind randomized clinical trial controlled by placebo with an alpha linoleic acid and prebiotic enriched cookie on risk cardiovascular factor in obese patients. NUTR HOSP 2012; 26:827-33. [PMID: 22470031 DOI: 10.1590/s0212-16112011000400024] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Accepted: 11/28/2010] [Indexed: 11/21/2022] Open
Abstract
INTRODUCTION Inulin and FOS are prebiotics with potential benefit in cardiovascular risk factors. Alpha linolenic acid (ALA) is the metabolic precursor of the long chain n-3 fatty acid eicosapentaenoic acid (20: 5n-3), this fatty acid has anti-inflammatory properties. The aim of our study was to evaluate the response of the cardiovascular risk profile in obese patients after inclusion in the diet of an ALA, FOS and inulin enriched-cookie. MATERIAL AND METHODS 36 patients were randomized in both branches: group I (inulin, FOS and ALA enriched cookie) Gullon SL(®) and group II (control cookie). Previous and after 1 month of the treatment, a nutritional and biochemical study was realized. RESULTS 15 patients finished the procotol in each group. In group I, a significantly increase in soluble fiber (2.3 ± 0.8 g/day vs 7.7 ± 0.8 g/day: p < 0.05) and ALA (0.6 ± 0.5 g/day vs 3.8 ± 0.5 g/day; p < 0.05) intakes was detected. In this group a significant decrease of total cholesterol (238.1 ± 45.3 mg/dl vs 210.5 ± 38.1 mg/dl: p < 0.05), LDL cholesterol (153.6 ± 23.2 mg/dl vs 127.1 ± 27.9 mg/dl: p < 0.05) and C reactive protein (6.6 ± 1.4 mg/dl vs 4.4+7-1.8 mg/dl: p < 0.05) was reached in males. Anthropometric parameters did not change in both groups. The increase in soluble fiber and ALA dietary intakes did not produce any gastrointestinal adverse effect. CONCLUSION The increase of 2 grams per day of inulin, 3.1 grams per day of FOS and 3.2 grams per day of alpha linolenic (ALA) dietary intakes from an enriched-cookie, improved total cholesterol, LDL cholesterol and C reactive protein levels in obese males. As far as we know, this is the first study that has evaluated the effect on risk factors of an ALA enriched cookies.
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Affiliation(s)
- D A de Luis
- Instituto de Endocrinología y Nutrición, Facultad de Medicina y Unidad de Apoyo a la Investigación. Hospital Río Hortega, Universidad de Valladolid, Valladolid, España.
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32
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Galindo R, Dector A, Arriaga L, Gutiérrez S, Herrasti P. Maghemite as a catalyst for glucose oxidation in a microfluidic fuel cell. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2012.02.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Palumbo BT, Henderson ER, Edwards PK, Burris RB, Gutiérrez S, Raterman SJ. Initial experience of the Journey-Deuce bicompartmental knee prosthesis: a review of 36 cases. J Arthroplasty 2011; 26:40-5. [PMID: 21550763 DOI: 10.1016/j.arth.2011.03.026] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2011] [Accepted: 03/11/2011] [Indexed: 02/01/2023] Open
Abstract
We evaluated the effectiveness of a novel bicompartmental knee arthroplasty prosthesis for the treatment of degenerative disease affecting the medial and patellofemoral compartments. The study included 36 knees in 32 patients with a mean follow-up of 21 months. The mean Knee Society functional survey and Western Ontario McMaster Osteoarthritic Index Survey scores were 65.4 and 75.8, respectively. Thirty-one percent of patients were unsatisfied with the surgery, and 53% stated that they would not repeat the surgery. We report an overall survival rate of 86% with one catastrophically failed tibial baseplate. We conclude that this prosthesis provides inconsistent pain relief and unacceptable functional results for bicompartmental arthritis. Short-term survival of this prosthesis was unacceptably low, and therefore, we no longer implant it at our institution.
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Affiliation(s)
- Brian T Palumbo
- University of South Florida, Department of Orthopaedic Surgery, Tampa, Florida, USA
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34
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Gutiérrez S, Respaldiza N, Campano E, Martínez-Risquez MT, Calderón EJ, De La Horra C. Pneumocystis jirovecii colonization in chronic pulmonary disease. Parasite 2011; 18:121-6. [PMID: 21678787 PMCID: PMC3671413 DOI: 10.1051/parasite/2011182121] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [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: 11/28/2022] Open
Abstract
Pneumocystis jirovecii causes pneumonia in immunosuppressed individuals. However, it has been reported the detection of low levels of Pneumocystis DNA in patients without signs and symptoms of pneumonia, which likely represents colonization. Several studies performed in animals models and in humans have demonstrated that Pneumocystis induces a local and a systemic response in the host. Since P. jirovecii colonization has been found in patients with chronic pulmonary diseases it has been suggested that P. jirovecii may play a role in the physiopathology and progression of those diseases. In this report we revise P. jirovecii colonization in different chronic pulmonary diseases such us, chronic obstructive pulmonary disease, interstitial lung diseases, cystic fibrosis and lung cancer.
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Affiliation(s)
- S Gutiérrez
- Instituto de Biomedicina de Sevilla, Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Seville, Spain.
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35
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Gutiérrez S, Walker M, Willis M, Pupello DR, Frankle MA. Effects of tilt and glenosphere eccentricity on baseplate/bone interface forces in a computational model, validated by a mechanical model, of reverse shoulder arthroplasty. J Shoulder Elbow Surg 2011; 20:732-9. [PMID: 21288743 DOI: 10.1016/j.jse.2010.10.035] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2010] [Revised: 10/19/2010] [Accepted: 10/24/2010] [Indexed: 02/01/2023]
Abstract
HYPOTHESIS/BACKGROUND Reverse shoulder arthroplasty is being used with greater frequency for patients with severe rotator cuff deficiency. There are several commercially available reverse shoulder devices, each with different glenosphere options. The purpose of this study was to determine: (1) forces at the baseplate-bone interface in glenospheres with centers of rotation located concentrically and eccentrically to the center of the baseplate; and (2) if baseplate-bone forces can be optimized by altering tilt of the baseplate. METHODS A validated computer model was used to compare concentric glenospheres with neutral offset to eccentrically offset glenospheres (6 mm inferior or 6 mm lateral) in 3 baseplate tilts: 15° inferior, neutral, or 15° superior. A baseplate, simulated bone, screws, and humeral component were modeled, and forces underneath the baseplate were calculated as the arm was abducted through 90° of glenohumeral motion. RESULTS For lateral and concentric glenospheres, inferior tilt provides the most even distribution of forces (mean difference in force between superior and inferior portions of baseplate: 11.3 N and 24.7 N, respectively) and superior tilt provides the most uneven distribution of forces (109.3 N and 78.7 N, respectively). For inferior eccentric glenospheres, inferior tilt provides the most uneven distribution of forces (58.7 N) and neutral tilt provides the most even distribution of forces (27.7 N). CONCLUSION This is the first study to investigate force distribution under the baseplate in inferior eccentric glenospheres. Although inferior tilting of the baseplate is recommended for concentric and laterally offset glenospheres, this same recommendation may be detrimental to inferiorly offset glenospheres and warrants further investigation.
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Affiliation(s)
- Sergio Gutiérrez
- The Phillip Spiegel Orthopaedic Research Laboratory at the Foundation for Orthopaedic Research and Education, Tampa, FL, USA
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Cardoza RE, Malmierca MG, Hermosa MR, Alexander NJ, McCormick SP, Proctor RH, Tijerino AM, Rumbero A, Monte E, Gutiérrez S. Identification of loci and functional characterization of trichothecene biosynthesis genes in filamentous fungi of the genus Trichoderma. Appl Environ Microbiol 2011; 77:4867-77. [PMID: 21642405 PMCID: PMC3147405 DOI: 10.1128/aem.00595-11] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Accepted: 05/21/2011] [Indexed: 11/20/2022] Open
Abstract
Trichothecenes are mycotoxins produced by Trichoderma, Fusarium, and at least four other genera in the fungal order Hypocreales. Fusarium has a trichothecene biosynthetic gene (TRI) cluster that encodes transport and regulatory proteins as well as most enzymes required for the formation of the mycotoxins. However, little is known about trichothecene biosynthesis in the other genera. Here, we identify and characterize TRI gene orthologues (tri) in Trichoderma arundinaceum and Trichoderma brevicompactum. Our results indicate that both Trichoderma species have a tri cluster that consists of orthologues of seven genes present in the Fusarium TRI cluster. Organization of genes in the cluster is the same in the two Trichoderma species but differs from the organization in Fusarium. Sequence and functional analysis revealed that the gene (tri5) responsible for the first committed step in trichothecene biosynthesis is located outside the cluster in both Trichoderma species rather than inside the cluster as it is in Fusarium. Heterologous expression analysis revealed that two T. arundinaceum cluster genes (tri4 and tri11) differ in function from their Fusarium orthologues. The Tatri4-encoded enzyme catalyzes only three of the four oxygenation reactions catalyzed by the orthologous enzyme in Fusarium. The Tatri11-encoded enzyme catalyzes a completely different reaction (trichothecene C-4 hydroxylation) than the Fusarium orthologue (trichothecene C-15 hydroxylation). The results of this study indicate that although some characteristics of the tri/TRI cluster have been conserved during evolution of Trichoderma and Fusarium, the cluster has undergone marked changes, including gene loss and/or gain, gene rearrangement, and divergence of gene function.
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Affiliation(s)
- R. E. Cardoza
- Area of Microbiology, University School of Agricultural Engineers, University of León, Campus de Ponferrada, Avda. Astorga s/n, 24400 Ponferrada, Spain
| | - M. G. Malmierca
- Area of Microbiology, University School of Agricultural Engineers, University of León, Campus de Ponferrada, Avda. Astorga s/n, 24400 Ponferrada, Spain
| | - M. R. Hermosa
- Spanish-Portuguese Centre of Agricultural Research (CIALE), Departament of Microbiology and Genetics, University of Salamanca, Edificio Departamental Lab 208, Plaza Doctores de la Reina s/n, 37007 Salamanca, Spain
| | - N. J. Alexander
- Bacterial Foodborne Pathogen and Mycology Unit, USDA/ARS, National Center for Agricultural Utilization Research, Peoria, Illinois 61604-3902
| | - S. P. McCormick
- Bacterial Foodborne Pathogen and Mycology Unit, USDA/ARS, National Center for Agricultural Utilization Research, Peoria, Illinois 61604-3902
| | - R. H. Proctor
- Bacterial Foodborne Pathogen and Mycology Unit, USDA/ARS, National Center for Agricultural Utilization Research, Peoria, Illinois 61604-3902
| | - A. M. Tijerino
- Spanish-Portuguese Centre of Agricultural Research (CIALE), Departament of Microbiology and Genetics, University of Salamanca, Edificio Departamental Lab 208, Plaza Doctores de la Reina s/n, 37007 Salamanca, Spain
| | - A. Rumbero
- Departament of Organic Chemistry, Faculty of Science, Autonomous University of Madrid, Ciudad Universitaria de Cantoblanco, 28049 Madrid, Spain
| | - E. Monte
- Spanish-Portuguese Centre of Agricultural Research (CIALE), Departament of Microbiology and Genetics, University of Salamanca, Edificio Departamental Lab 208, Plaza Doctores de la Reina s/n, 37007 Salamanca, Spain
| | - S. Gutiérrez
- Area of Microbiology, University School of Agricultural Engineers, University of León, Campus de Ponferrada, Avda. Astorga s/n, 24400 Ponferrada, Spain
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Montero-Barrientos M, Hermosa R, Cardoza RE, Gutiérrez S, Monte E. Functional analysis of the Trichoderma harzianum nox1 gene, encoding an NADPH oxidase, relates production of reactive oxygen species to specific biocontrol activity against Pythium ultimum. Appl Environ Microbiol 2011; 77:3009-16. [PMID: 21421791 PMCID: PMC3126390 DOI: 10.1128/aem.02486-10] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Accepted: 03/04/2011] [Indexed: 12/25/2022] Open
Abstract
The synthesis of reactive oxygen species (ROS) is one of the first events following pathogenic interactions in eukaryotic cells, and NADPH oxidases are involved in the formation of such ROS. The nox1 gene of Trichoderma harzianum was cloned, and its role in antagonism against phytopathogens was analyzed in nox1-overexpressed transformants. The increased levels of nox1 expression in these transformants were accompanied by an increase in ROS production during their direct confrontation with Pythium ultimum. The transformants displayed an increased hydrolytic pattern, as determined by comparing protease, cellulase, and chitinase activities with those for the wild type. In confrontation assays against P. ultimum the nox1-overexpressed transformants were more effective than the wild type, but not in assays against Botrytis cinerea or Rhizoctonia solani. A transcriptomic analysis using a Trichoderma high-density oligonucleotide (HDO) microarray also showed that, compared to gene expression for the interaction of wild-type T. harzianum and P. ultimum, genes related to protease, cellulase, and chitinase activities were differentially upregulated in the interaction of a nox1-overexpressed transformant with this pathogen. Our results show that nox1 is involved in T. harzianum ROS production and antagonism against P. ultimum.
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Affiliation(s)
- M. Montero-Barrientos
- Spanish-Portuguese Center for Agricultural Research (CIALE), Department of Microbiology and Genetics, University of Salamanca, Campus of Villamayor, Río Duero 12, 37185 Salamanca, Spain
| | - R. Hermosa
- Spanish-Portuguese Center for Agricultural Research (CIALE), Department of Microbiology and Genetics, University of Salamanca, Campus of Villamayor, Río Duero 12, 37185 Salamanca, Spain
| | - R. E. Cardoza
- Area de Microbiología, Escuela Universitaria de Ciencias de la Salud, Universidad de León, Campus de Ponferrada, Avda. Astorga s/n, 24400 Ponferrada, Spain
| | - S. Gutiérrez
- Area de Microbiología, Escuela Universitaria de Ciencias de la Salud, Universidad de León, Campus de Ponferrada, Avda. Astorga s/n, 24400 Ponferrada, Spain
| | - E. Monte
- Spanish-Portuguese Center for Agricultural Research (CIALE), Department of Microbiology and Genetics, University of Salamanca, Campus of Villamayor, Río Duero 12, 37185 Salamanca, Spain
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Abstract
Langerhans cell histiocytosis (LCH) is a rare granulomatous disease of unknown etiology. We retrospectively reviewed data from four patients (3 males and 1 female), mean age 33.5 years old (range: 21-40), with histopathological diagnosis of LCH. All of them presented with symptoms suggestive of endocrine involvement. The main complaint was goiter in two patients and polyuria and polydipsia in three. Before the LCH diagnosis, two patients had unevaluated symptoms of diabetes insipidus (DI) and hypogonadism. The mean time from symptoms onset to diagnosis was 6.25 years (range: 2-13). Histopathological diagnosis was established by total thyroidectomy (TT) biopsy in two patients, skin lesion biopsy in one, and pituitary stalk biopsy in the other. In the two-first patients, surgery was indicated after the fine-needle aspiration biopsy (FNAB) showed a false positive result of differentiated thyroid carcinoma and immunohistochemistry was used for diagnosis confirmation. Three cases were treated with chemotherapy; one of them had already received radiation therapy on the hypothalamic-pituitary region, developing post-radiation hypopituitarism.
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Affiliation(s)
- M S García Gallo
- Endocrinology Division, Hospital Carlos G. Durand, Av Díaz Vélez 5040, Buenos Aires, C1405DCR, Argentina.
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Gutiérrez S, Petiti JP, Sosa LDV, Fozzatti L, De Paul AL, Masini-Repiso AM, Torres AI. 17β-oestradiol acts as a negative modulator of insulin-induced lactotroph cell proliferation through oestrogen receptor α, via nitric oxide/guanylyl cyclase/cGMP. Cell Prolif 2010; 43:505-14. [PMID: 20887556 DOI: 10.1111/j.1365-2184.2010.00700.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVES 17β-oestradiol interacts with growth factors to modulate lactotroph cell population. However, contribution of isoforms of the oestrogen receptor in these activities is not fully understood. In the present study, we have established participation of α and β oestrogen receptors in effects of 17β-oestradiol on lactotroph proliferation induced by insulin and shown involvement of the NO/sGC/cGMP pathway. MATERIALS AND METHODS Cell cultures were prepared from anterior pituitaries of female rats to evaluate lactotroph cell proliferation using bromodeoxyuridine (BrdUrd) detection, protein expression by western blotting and cGMP by enzyme immunoassay. RESULTS In serum-free conditions, 17β-oestradiol and α and β oestrogen receptor agonists (PPT and DPN) failed to increase numbers of lactotroph cells undergoing mitosis. Co-incubation of 17β-oestradiol/insulin and PPT/insulin significantly decreased lactotroph mitogenic activity promoted by insulin alone. Both ICI 182780 and NOS inhibitors (L-NMMA and L-NAME) induced reversal of the anti-proliferative effect promoted by 17β-oestradiol/insulin and PPT/insulin. Moreover, 17β-oestradiol, PPT and insulin increased sGC α1 protein expression and inhibited β1, whereas co-incubation of 17β-oestradiol/insulin or PPT/insulin induced increases of the two isoforms α1 and β1. 17β-oestradiol and insulin reduced cGMP production, while 17β-oestradiol/insulin co-incubation increased this cyclic nucleotide. CONCLUSIONS Our results suggest that 17β-oestradiol is capable of arresting lactotroph proliferation induced by insulin through ER α with participation of the signalling NO/sGC/cGMP pathway.
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Affiliation(s)
- S Gutiérrez
- Center of Electron Microscopy, Faculty of Medical Sciences, National University of Córdoba, Córdoba, Argentina.
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de Luis DA, de la Fuente B, Izaola O, Conde R, Gutiérrez S, Morillo M, Teba Torres C. [Randomized clinical trial with a inulin enriched cookie on risk cardiovascular factor in obese patients]. NUTR HOSP 2010; 25:53-59. [PMID: 20204256] [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] [Received: 10/05/2009] [Accepted: 10/06/2009] [Indexed: 05/28/2023] Open
Abstract
INTRODUCTION Inulin is a prebiotic with potential benefit in cardiovascular risk factors. The aim of our work is to evaluate in obese patients the effect of a inulin enriched cookie on cardiovascular risk factors. MATERIAL AND METHODS 34 patients were randomized in both branches: group I (inulin enriched cookie) Gullon SL(R) and group II (control cookie). Previous and after 1 month of the treatment, a nutritional and biochemical study was realized. RESULTS 15 patients finished the procotol in each group. In group I, an increase in soluble fiber intake (inulin) was detected. In this group a significant decrease of total cholesterol (223.1 +/- 45.3 mg/dl vs 208.8 +/- 33.1 mg/dl; p < 0.05) and LDL cholesterol (142.9 +/- 39.2 mg/dl vs 131.4 +/- 28.6 mg/dl; p < 0.05) was reached. A non significant improvement in insulin levels and HOMA was detected in inulin-enriched cookie group, too. Anthropometric parameters did not change in both groups. The increase in soluble fiber intake did not produce any gastrointestinal adverse effect. CONCLUSION The increase of fiber intake (3 g of inulin) from an enriched cookie reduced LDL cholesterol levels in obese patients.
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Affiliation(s)
- D A de Luis
- Instituto de Endocrinología y Nutrición, Facultad de Medicina, Universidad de Valladolid, Simancas, Valladolid, España.
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Gutiérrez S, Luo ZP, Levy J, Frankle MA. Arc of motion and socket depth in reverse shoulder implants. Clin Biomech (Bristol, Avon) 2009; 24:473-9. [PMID: 19346036 DOI: 10.1016/j.clinbiomech.2009.02.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2009] [Revised: 02/26/2009] [Accepted: 02/27/2009] [Indexed: 02/07/2023]
Abstract
BACKGROUND Reverse shoulder arthroplasty relies on its congruent ball/socket joint to restore shoulder function. For a simple ball/socket joint, as shown in total hip arthroplasty, range of motion decreases with the increase of articular constraint. We challenge here that this intuitive concept might not be held in reverse shoulder arthroplasty because of the effect of multiple concurrent factors. METHODS Abduction impingement-free arc of motion in reverse shoulder arthroplasty was examined with a virtual computer model. Six articular constraints, defined by normalized socket depths, were simulated. Four concurrent factors: glenosphere diameter, lateral offset of glenosphere from the glenoid surface, humeral neck-shaft angles, and locations of the glenosphere on the glenoid surface, were also studied, which composed a total of 81 combinations and 486 individual conditions. FINDINGS Three distinct classes of arc of motion relative to the articular constraint were revealed: I--arc of motion decreased with increased constraint (57%), II--arc of motion with a complex relationship to constraint (37%), and III--arc of motion increased with increased constraint (6%). INTERPRETATION Classes II and III were counter-intuitive which could be caused by impingement on the acromion associated primarily with superior positioning. Surgeons may need to be aware of it when the glenoid component has to be placed superiorly. The detailed motion/constraint relationship will further help engineers improve the design in reverse shoulder arthroplasty.
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Affiliation(s)
- Sergio Gutiérrez
- The Phillip Spiegel Orthopaedic Research Laboratory at the Foundation for Orthopaedic Research and Education (FORE), 13020 N. Telecom Parkway, Tampa, FL 33637, USA
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Gutiérrez S, Comiskey CA, Luo ZP, Pupello DR, Frankle MA. Range of impingement-free abduction and adduction deficit after reverse shoulder arthroplasty. Hierarchy of surgical and implant-design-related factors. J Bone Joint Surg Am 2008; 90:2606-15. [PMID: 19047705 DOI: 10.2106/jbjs.h.00012] [Citation(s) in RCA: 201] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Evaluations of functional outcomes of reverse shoulder arthroplasty have revealed variable improvements in the range of motion and high rates of scapular notching. The purpose of this study was to systematically examine the impact of surgical factors (location of the glenosphere on the glenoid and tilt angle of the glenosphere on the glenoid) and implant-related factors (implant size, center-of-rotation offset, and humeral neck-shaft angle) on impingement-free abduction motion. METHODS A computer model was developed to virtually simulate abduction/adduction motion and its dependence on five surgical and implant-related factors. Three conditions were tested for each factor, resulting in a total of 243 simulated combinations. The overall motion was determined from 0 degrees of abduction until maximum abduction, which would be limited by impingement of the humerosocket on the scapula. In those combinations in which 0 degrees of abduction could not be achieved, the adduction deficit was recorded. RESULTS The largest average increase in the range of impingement-free abduction motion resulted from a more lateral center-of-rotation offset: the average increase was 31.9 degrees with a change in the center-of-rotation offset from 0 to 10 mm, and this change resulted in an increase in abduction motion in eighty of the eighty-one combinations. The position of the glenosphere on the glenoid was associated with the second largest average increase in abduction motion (28.1 degrees when the glenosphere position was changed from superior to inferior, with the change resulting in an increase in seventy-one of the eighty-one combinations). These factors were followed by glenosphere tilt, humeral neck-shaft angle, and prosthetic size in terms of their effects on abduction motion. The largest effect in terms of avoiding an adduction deficit was provided by a humeral neck-shaft angle of 130 degrees (the deficit was avoided in forty-nine of the eighty-one combinations in which this angle was used), followed by an inferior glenosphere position on the glenoid (deficit avoided in forty-one combinations), a 10-mm lateral offset of the center of rotation, inferior tilt of the glenosphere, and a 42-mm-diameter prosthetic size. CONCLUSIONS An understanding of a hierarchy of prosthetic design and implantation factors may be important to maximize impingement-free abduction motion as well as to avoid inferior impingement.
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Affiliation(s)
- Sergio Gutiérrez
- Florida Orthopaedic Institute Research Foundation, 13020 North Telecom Parkway, Tampa, FL 33637, USA
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Isaguirre J, Gutiérrez S, Ongay R, Ravier RP. Endoscopic treatment of duodenal perforation following laparoscopic cholecystectomy. Endoscopy 2008; 40 Suppl 2:E138. [PMID: 18633873 DOI: 10.1055/s-2007-995731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- J Isaguirre
- Department of Gastroenterology and Digestive Endoscopy, Hospital Italiano, Mendoza, Argentina
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Abstract
Although clinical outcomes of the reverse shoulder replacement have noted improvements in pain and function, evaluation of these outcomes reveals concerns regarding progressive scapular notching and variability of functional improvements in range of motion. Therefore, an apparatus was designed to examine differences in abduction range of motion for seven configurations of reverse shoulder arthroplasty. An electronic goniometer was used to measure abduction range of motion, and digital video analysis was used to determine impingement points. Finally, a correlation analysis between range of motion and the effect of changing the center of rotation of the glenosphere was performed. As the center of rotation was moved more lateral from the glenoid, abduction range of motion increased. The greatest range of motion was 97 degrees +/- 0.9 degrees using a glenoid component with a center of rotation offset 10 mm +/- 0.4 mm from the glenoid. The smallest range of motion was 67 degrees +/- 1.8 degrees using a glenosphere with a center of rotation offset 0.5 mm +/- 0.1 mm from the glenoid surface. Range of motion always was limited by impingement points on the scapula. Inferiorly, adduction was limited by impingement on either the inferior scapular border or the glenoid. Superiorly, abduction was limited by impingement on the acromion. A positive linear correlation was found between abduction range of motion and center of rotation offset relative to the glenoid.
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Affiliation(s)
- Sergio Gutiérrez
- Musculoskeletal Research Foundation, Florida Orthopaedic Institute, Temple Terrace, FL 33637, USA.
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Gutiérrez S, Pardo B. Sequencing in Web-Based Education: Approaches, Standards and Future Trends. Evolution of Teaching and Learning Paradigms in Intelligent Environment 2007. [DOI: 10.1007/978-3-540-71974-8_5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Gutiérrez S, Greiwe RM, Frankle MA, Siegal S, Lee WE. Biomechanical comparison of component position and hardware failure in the reverse shoulder prosthesis. J Shoulder Elbow Surg 2006; 16:S9-S12. [PMID: 16990024 DOI: 10.1016/j.jse.2005.11.008] [Citation(s) in RCA: 133] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2005] [Accepted: 11/15/2005] [Indexed: 02/01/2023]
Abstract
There has been renewed interest in reverse shoulder arthroplasty for the treatment of glenohumeral arthritis with concomitant rotator cuff deficiency. Failure of the prosthesis at the glenoid attachment site remains a concern. The purpose of this study was to examine glenoid component stability with regard to the angle of implantation. This investigation entailed a biomechanical analysis to evaluate forces and micromotion in glenoid components attached to 12 polyurethane blocks at -15 degrees, 0 degrees, and +15 degrees of superior and inferior tilt. The 15 degrees inferior tilt had the most uniform compressive forces and the least amount of tensile forces and micromotion when compared with the 0 degrees and 15 degrees superiorly tilted baseplate. Our results suggest that implantation with an inferior tilt will reduce the incidence of mechanical failure of the glenoid component in a reverse shoulder prosthesis.
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Affiliation(s)
- Sergio Gutiérrez
- Musculoskeletal Research Foundation, Florida Orthopaedic Institute, Temple Terrace, FL 33637, USA
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Vizcaíno JA, Cardoza RE, Dubost L, Bodo B, Gutiérrez S, Monte E. Detection of peptaibols and partial cloning of a putative peptaibol synthetase gene fromT. harzianum CECT 2413. Folia Microbiol (Praha) 2006; 51:114-20. [PMID: 16821720 DOI: 10.1007/bf02932165] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [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: 11/28/2022]
Abstract
The characterization of 11- and 18-residue peptaibols (peptides synthesized by peptide synthetases) at Trichoderma harzianum CECT 2413 (a filamentous fungus) was performed. Using a heterologous probe from tex1, the only peptaibol synthetase cloned and characterized so far in Trichoderma species, was cloned; a region that comprised 11676 bp of a second peptide synthetase gene detected in these strain (called salps2) and sequenced. The deduced sequence of Salps2 (3891 amino acids) contained three complete and a fourth incomplete module of a peptide synthetase, in which the typical adenylation, thiolation and condensation domains were found, but also an additional dehydrogenase/reductase domain in the C-terminus of the last module. Based on sequence similarity and analysis of its modular structure, it is proposed that Salps2 is a peptaibol synthetase. Additionally, analysis of =4.4-kb sequence downstream of salps2 was done and the signature sequences of Salps2 were identified and compared with those of available sequences of the other Trichoderma peptaibol synthetases.
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Affiliation(s)
- J A Vizcaíno
- Spanish-Portuguese Center of Agricultural Research (CIALE), Department de Microbiology and Genetics, University of Salamanca, 37007 Salamanca, Spain.
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Soriano-Sarabia N, Abad MA, Vallejo A, Gutiérrez S, Leal M. Influence of hepatitis C and hepatitis G virus co-infection on viral and cellular dynamics in patients infected with human immunodeficiency virus following interruption of highly active anti-retroviral therapy. Clin Microbiol Infect 2006; 12:290-3. [PMID: 16451419 DOI: 10.1111/j.1198-743x.2005.01347.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 11/30/2022]
Abstract
This study describes the influence of hepatitis C virus (HCV) and hepatitis G virus (HGV) co-infection on CD4 cell count decline and plasma human immunodeficiency virus (HIV) viral load in HIV-infected patients during a 1-year period following interruption of highly active anti-retroviral therapy (HAART) guided by CD4 count. CD4 cell count decline and plasma HIV viral load did not differ between HIV mono-infected patients and those patients co-infected with HCV and HGV. HCV genotype 1 had no apparent influence on the cellular and viral dynamics in HIV-infected patients compared with other HCV genotypes, although the unbalanced groups make larger studies desirable.
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Affiliation(s)
- N Soriano-Sarabia
- Viral Hepatitis and AIDS Unit, Virgen del Rocío University Hospital, Seville, Spain
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Cardoza RE, Vizcaíno JA, Hermosa MR, Sousa S, González FJ, Llobell A, Monte E, Gutiérrez S. Cloning and characterization of the erg1 gene of Trichoderma harzianum: effect of the erg1 silencing on ergosterol biosynthesis and resistance to terbinafine. Fungal Genet Biol 2006. [PMID: 16466954 DOI: 10.1016/j.frb.2005.11.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Trichoderma species are commonly used as biocontrol agents of different plant-pathogenic fungi. Terpene compounds are involved in the biocontrol process due to their antifungal properties (e.g., ergokonins and viridins) but additionally their structural function in the cell membranes (ergosterol) is essential. We report here the characterization of the T. harzianum erg1 gene, encoding a squalene epoxidase, a key enzyme in the biosynthesis of triterpene derivatives such as ergosterol. In T. harzianum the partial silencing of the erg1 gene gave rise to transformants with a higher level of sensitivity to terbinafine, an antifungal compound that acts specifically over the squalene epoxidase activity. In addition, these silenced transformants produced lower levels of ergosterol than the wild type strain. Finally, the silencing of the erg1 gene resulted in an increase in the expression level of the erg7 gene that encodes the oxidosqualene lanosterol-cyclase, another enzyme of the terpene biosynthesis pathway.
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MESH Headings
- Antifungal Agents/pharmacology
- Cloning, Molecular
- DNA, Fungal/chemistry
- DNA, Fungal/genetics
- Drug Resistance, Fungal/genetics
- Ergosterol/biosynthesis
- Gene Expression Regulation, Fungal
- Gene Silencing
- Genetic Complementation Test
- Intramolecular Transferases/genetics
- Microbial Sensitivity Tests
- Molecular Sequence Data
- Naphthalenes/pharmacology
- Phylogeny
- RNA, Fungal/analysis
- RNA, Messenger/analysis
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
- Squalene Monooxygenase/genetics
- Squalene Monooxygenase/physiology
- Terbinafine
- Transcription, Genetic
- Trichoderma/drug effects
- Trichoderma/genetics
- Trichoderma/physiology
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Affiliation(s)
- R E Cardoza
- Spanish-Portuguese Center of Agricultural Research (CIALE), Departamento de Microbiología y Genética, Universidad de Salamanca, Edificio Departamental lab 208, Spain
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