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Barreto G, Loureiro LMR, Reis CEG, Saunders B. Effects of caffeine chewing gum supplementation on exercise performance: a systematic review and meta-analysis. Eur J Sport Sci 2022; 23:714-725. [PMID: 35239468 DOI: 10.1080/17461391.2022.2049885] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The aim of this systematic review with meta-analysis was to determine the effect of caffeine gum (Caff-gum) on exercise performance-related outcomes. Medline, EmBase, and SPORTSDiscus, and the register ClinicalTrials.gov were searched in March 2021, for studies assessing the effect of Caff-gum in placebo-controlled protocols involving healthy adults (i.e., with no chronic diseases or health conditions). Risk of bias was assessed using the RoB 2 tool. Random-effects meta-analyses using standardized mean differences (SMD) were performed to determine the effect of Caff-gum on exercise outcomes with several sub-analyses (training status, exercise type, timing and dose) for potential modifying factors. 14 studies were included, totaling 200 participants. There was a significant overall effect of Caff-gum compared to placebo (SMD = 0.21, 95%CI: 0.10-0.32; p = 0.001). Subgroup analysis showed improved performance for trained (SMD = 0.23, 95%CI: 0.08-0.37; p = 0.004), but not for untrained (SMD = 0.14, 95%CI: -0.02-0.29; p = 0.07) individuals. Caff-gum improved both endurance (SMD = 0.27, 95%CI: 0.12-0.42; p = 0.002) and strength/power (SMD = 0.20, 95%CI: 0.03-0.37; p = 0.03) performance outcomes. Caff-gum was ergogenic when consumed within 15 min prior to initiating exercise (SMD = 0.27, 95%CI: 0.07-0.4; p = 0.01), but not when provided >15 min prior (SMD=-0.48, 95%CI= -1.7-0.82; p = 0.25). There was no significant effect of Caff-gum with doses <3 mg/kg body mass (BM) (SMD = 0.20, 95%CI: -0.03-0.43; p = 0.07), but there was a significant effect when the dose was ≥3 mg/kg BM (SMD = 0.22, 95%CI: 0.07-0.37; p = 0.01). Caff-gum supplementation may be an effective ergogenic strategy for trained athletes involved in both endurance and strength/power exercise, using a recommended dose of ≥3 mg/kg BM consumed within 15 minutes before the exercise.
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Affiliation(s)
- G Barreto
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport; Rheumatology Division; Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo, SP, BR, University of São Paulo, SP, Brazil
| | - L M R Loureiro
- Faculty of Nutrition FANUT, Department of Food and Nutrition, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil
| | - C E G Reis
- Department of Nutrition, Universidade de Brasília, Brasília, DF, Brazil
| | - B Saunders
- Institute of Orthopaedics and Traumatology, Faculty of Medicine FMUSP, University of São Paulo, Brazil
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Parantainen J, Barreto G, Koivuniemi R, Kautiainen H, Nordström D, Moilanen E, Hämäläinen M, Leirisalo-Repo M, Nurmi K, Eklund KK. The biological activity of serum bacterial lipopolysaccharides associates with disease activity and likelihood of achieving remission in patients with rheumatoid arthritis. Arthritis Res Ther 2022; 24:256. [PMID: 36411473 PMCID: PMC9677706 DOI: 10.1186/s13075-022-02946-z] [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: 05/17/2022] [Accepted: 11/03/2022] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Dysbiotic intestinal and oral microbiota have been implicated in the pathogenesis of rheumatoid arthritis (RA), but the mechanisms how microbiota could impact disease activity have remained elusive. The aim of this study was to assess the association of the biological activity of serum lipopolysaccharides (LPS) with disease activity and likelihood of achieving remission in RA patients. METHODS We measured Toll-like receptor (TLR) 4-stimulating activity of sera of 58 RA patients with a reporter cell line engineered to produce secreted alkaline phosphatase in response to TLR4 stimulation. Levels of LPS-binding protein, CD14, and CD163 were determined by ELISA assays. RESULTS The patient serum-induced TLR4 activation (biological activity of LPS) was significantly associated with inflammatory parameters and body mass index at baseline and at 12 months and with disease activity (DAS28-CRP, p<0.001) at 12 months. Importantly, baseline LPS bioactivity correlated with disease activity (p=0.031) and, in 28 early RA patients, the likelihood of achieving remission at 12 months (p=0.009). The level of LPS bioactivity was similar at baseline and 12-month visits, suggesting that LPS bioactivity is an independent patient-related factor. Neutralization of LPS in serum by polymyxin B abrogated the TLR4 signaling, suggesting that LPS was the major contributor to TLR4 activation. CONCLUSION We describe a novel approach to study the biological activity of serum LPS and their impact in diseases. The results suggest that LPS contribute to the inflammatory burden and disease activity on patients with RA and that serum-induced TLR4 activation assays can serve as an independent prognostic factor. A graphical summary of the conclusions of the study.
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Affiliation(s)
- J. Parantainen
- grid.7737.40000 0004 0410 2071Translational Immunology Research Program, Faculty of Medicine, University of Helsinki, PL 4 (Yliopistonkatu 3), 00014 Helsinki, Finland
| | - G. Barreto
- grid.7737.40000 0004 0410 2071Translational Immunology Research Program, Faculty of Medicine, University of Helsinki, PL 4 (Yliopistonkatu 3), 00014 Helsinki, Finland ,Orton Orthopedic Hospital, Helsinki, Finland
| | - R. Koivuniemi
- grid.7737.40000 0004 0410 2071Department of Rheumatology, Inflammation Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland ,grid.413739.b0000 0004 0628 3152Kanta-Häme Central Hospital, Riihimäki, Finland
| | - H. Kautiainen
- grid.410705.70000 0004 0628 207XFolkhälsan Research Center, Helsinki, Finland; Unit of Primary Health Care, Kuopio University Hospital, Kuopio, Finland
| | - D. Nordström
- grid.15485.3d0000 0000 9950 5666Department of Internal medicine and rehabilitation, Helsinki University and Helsinki University Hospital, Helsinki, Finland
| | - E. Moilanen
- grid.502801.e0000 0001 2314 6254The Immunopharmacology Research Group, Faculty of Medicine and Health Technology, University of Tampere and Tampere University Hospital, Tampere, Finland
| | - M. Hämäläinen
- grid.502801.e0000 0001 2314 6254The Immunopharmacology Research Group, Faculty of Medicine and Health Technology, University of Tampere and Tampere University Hospital, Tampere, Finland
| | - M. Leirisalo-Repo
- grid.7737.40000 0004 0410 2071Department of Rheumatology, Inflammation Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - K. Nurmi
- grid.7737.40000 0004 0410 2071Translational Immunology Research Program, Faculty of Medicine, University of Helsinki, PL 4 (Yliopistonkatu 3), 00014 Helsinki, Finland
| | - K. K. Eklund
- grid.7737.40000 0004 0410 2071Translational Immunology Research Program, Faculty of Medicine, University of Helsinki, PL 4 (Yliopistonkatu 3), 00014 Helsinki, Finland ,Orton Orthopedic Hospital, Helsinki, Finland ,grid.7737.40000 0004 0410 2071Department of Rheumatology, Inflammation Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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Carvalho Gontijo C, Porras-Hurtado LG, Freire-Aradas A, Fondevila M, Santos C, Salas A, Henao J, Isaza C, Beltrán L, Nogueira Silbiger V, Castillo A, Ibarra A, Moreno Chavez F, Söchtig J, Ruiz Y, Barreto G, Rondon F, Zabala W, Borjas L, de Oliveira SF, Carracedo A, Lareu MV, Phillips C. Corrigendum to "PIMA: A population informative multiplex for the Americas" [Forensic Sci. Int.: Genet. 44 (2020) 102200]. Forensic Sci Int Genet 2020; 48:102320. [PMID: 32574992 DOI: 10.1016/j.fsigen.2020.102320] [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] [Accepted: 01/28/2020] [Indexed: 11/29/2022]
Affiliation(s)
- C Carvalho Gontijo
- Forensic Genetics Unit, University of Santiago de Compostela, Spain; Human Genetics Laboratory, Institute of Biological Sciences, University of Brasília, Brazil
| | - L G Porras-Hurtado
- Forensic Genetics Unit, University of Santiago de Compostela, Spain; Medical Genetics Laboratory, Human Molecular Genetics Research Group, Technology University of Pereira, Colombia
| | - A Freire-Aradas
- Forensic Genetics Unit, University of Santiago de Compostela, Spain
| | - M Fondevila
- Forensic Genetics Unit, University of Santiago de Compostela, Spain
| | - C Santos
- Forensic Genetics Unit, University of Santiago de Compostela, Spain
| | - A Salas
- Forensic Genetics Unit, University of Santiago de Compostela, Spain
| | - J Henao
- Medical Genetics Laboratory, Human Molecular Genetics Research Group, Technology University of Pereira, Colombia
| | - C Isaza
- Medical Genetics Laboratory, Human Molecular Genetics Research Group, Technology University of Pereira, Colombia
| | - L Beltrán
- Medical Genetics Laboratory, Human Molecular Genetics Research Group, Technology University of Pereira, Colombia; Health Science Faculty, Unidad Central del Valle del Cauca, Tulua, Colombia
| | - V Nogueira Silbiger
- Department of Clinical and Toxicological Analysis, Health Sciences Center, Federal University of Rio Grande do Norte, Brazil
| | - A Castillo
- Medical Genetic Laboratory, Industrial University of Santander (UIS), Colombia
| | - A Ibarra
- Medical Genetics Laboratory, University of Antioquia, Colombia
| | - F Moreno Chavez
- Servicio Médico Legal, Ministry of Justice and Human Rights of Chile, Santiago, Chile
| | - J Söchtig
- Forensic Genetics Unit, University of Santiago de Compostela, Spain
| | - Y Ruiz
- Forensic Genetics Unit, University of Santiago de Compostela, Spain
| | - G Barreto
- Human Molecular Genetics Research Group, University of Valle, Colombia
| | - F Rondon
- School of Biology, Industrial University of Santander (UIS), Colombia
| | - W Zabala
- Molecular Genetics Laboratory, Medical Genetics Unit, University of Zulia, Venezuela
| | - L Borjas
- Molecular Genetics Laboratory, Medical Genetics Unit, University of Zulia, Venezuela
| | - S F de Oliveira
- Human Genetics Laboratory, Institute of Biological Sciences, University of Brasília, Brazil.
| | - A Carracedo
- Forensic Genetics Unit, University of Santiago de Compostela, Spain; Grupo de Medicina Xenómica, CIBERER, University of Santiago de Compostela, Spain
| | - M V Lareu
- Forensic Genetics Unit, University of Santiago de Compostela, Spain
| | - C Phillips
- Forensic Genetics Unit, University of Santiago de Compostela, Spain.
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Kauppinen S, Fercher D, Barreto G, Morgese G, Benetti E, Saarakkala S, Nieminen H, Zenobi-Wong M, Finnilä MA. THU0059 INCREASING SURFACE LUBRICATION WITH POLY(2-METHYL-2-OXAZOLINE) HALTS DEGENERATIVE CHANGES IN THE CARTILAGE IN A COLLAGENASE INDUCED OSTEOARTHRITIS (CIOA) RAT MODEL. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.1673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Degenerative lesions of articular cartilage (AC) surface are related to disruption of the well-organized collagen network and allow proteoglycans to escape from the tissue. Ultimately, this leads to the development of osteoarthritis (OA). Targeted therapy for early AC lesions could provide an effective way to halt the OA development process.Objectives:This study aims to evaluate the effectiveness of an engineered surface lubricant; poly(2-methyl-2-oxazoline) (PMOXA)1to prevent the destruction of the AC surface. Our recently developed contrast-enhanced µCT (CEµCT) method was used to quantify AC surface erosion2.Methods:OA was induced in 12-18 week-old male Wistar rats (N=17) with an injection of 250 U Collagenase within 25 µL solution into the left hind limb. Both hind legs were treated with a second injection three days after the collagenase injection (CI). Three groups were formed by using either PMOXA (N=5), hyaluronic acid (HA; N=6), or saline (N=6) during the second injection. The animals were sacrificed after 45 days, and harvested knees were fixed in phosphate-buffered formalin for a week. Knees were stored in 70% ethanol, and tibia and femur were carefully dissected free of other tissue, stained with 1% phosphotungstic acid3, and scanned with a desktop µCT with 2.8µm pixel size. The medial and lateral AC surfaces were manually segmented from 3D projections using an in-house developed program (Matlab sofware). These surfaces were analyzed by iteratively fitting a reference surface (RS) to a median-filtered smoothed surface representing a perfectly smooth surface, capturing the realistic shape AC. An offset of 5 pixels (14 µm) was added between the RS and the original surface (OS). Two quantitative parameters were calculated from the data: Average of Maximum Void Depth (MVD) (depth of lesion) and Degeneration-% (area exceeding 20 µm MVD / whole area) *100). Estimates of mean differences from all groups against the CI+Saline -group were determined using a linear mixed model.Results:Boxplots from tested groups are shown in Fig. 1A and MVD results are visualized in Fig. 1B. Collagenase caused structural defects only on the medial and lateral tibial AC surfaces, which was seen as increased MVD and Degeneration-%. CI changes were not seen in PMOXA or HA treated groups. Furthermore, MVD and Degeneration% were lower in CI knees that were treated with PMOXA.Figure 1.A) Boxplots of Maximum Void Depth (MVD) and Degeneration-%. Lateral and medial side are analyzed separately for both tibias and femurs. Stars indicate if a group was statistically different from control group (CI+Saline).CI= red, no CI= blue. B) Representative visualizations for maximum void depth overlayed on top of the 3D AC surface.Conclusion:Our CEµCT analysis method was able to detect subtle changes of the AC surface in the medial and lateral tibial cartilage, caused by the CI. In contrast, the CI did not cause detectable changes in the AC of the femur, which indicates that in the CIOA model, the tibia is more susceptible to structural degradation. Our results show that early intervention with HA or PMOXA can halt the degenerative AC changes caused by CI. However, HA did not suppress the effects of CI in the medial tibia, which indicates that PMOXA could be more effective to prevent the development of OA.References:[1]Morgese G, et al. Hairy and slippery polyoxazoline-based copolymers on model and cartilage surfaces. Biomacromolecules 2018 19 (2), 680-690[2]Ylitalo T, et al. Quantifying Complex Micro-Topography of Degenerated Articular Cartilage Surface by Contrast-Enhanced Micro-Computed Tomography and Parametric Analyses. J Orthop Res. 2019 Apr;37(4):855-866.[3]Nieminen HJ, et al. Determining collagen distribution in articular cartilage using contrast-enhanced micro-computed tomography. Osteoarthritis Cartilage. 2015;23(9):1613–1621Disclosure of Interests:None declared
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Barreto G, Senturk B, Colombo L, Brück O, Neidenbach P, Salzmann G, Zenobi-Wong M, Rottmar M. Lumican is upregulated in osteoarthritis and contributes to TLR4-induced pro-inflammatory activation of cartilage degradation and macrophage polarization. Osteoarthritis Cartilage 2020; 28:92-101. [PMID: 31715293 DOI: 10.1016/j.joca.2019.10.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [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: 05/16/2019] [Revised: 10/24/2019] [Accepted: 10/31/2019] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Lumican (LUM) is a major extracellular matrix glycoprotein in adult articular cartilage and its expression is known to be upregulated upon cartilage degeneration. LUM is associated with the pathogen-associated molecular pattern (PAMP) activation of the TLR4 signalling cascade, with TLR4 being highly associated with inflammation in rheumatic diseases. However, the main role of the LUM structural molecule in osteoarthritis (OA) remains elusive. The aim of this study was, therefore, to understand the role of LUM during TLR4-mediated activation in OA. METHODS After measuring LUM levels in synovial fluid (SF) of OA patients and lipopolysaccharide (LPS)-induced TLR4 activation, the role of LUM in the expression of pro-inflammatory molecules and cartilage degradation was assessed in vitro and ex vivo in a cartilage explant model. Primary macrophage activation and polarization were studied upon LUM co-stimulation with LPS. RESULTS We demonstrate that LUM is not only significantly upregulated in SF from OA patients compared to healthy controls, but also that LUM increases lipopolysaccharide (LPS)-induced TLR4 activation. Furthermore, we show that a pathophysiological level of LUM augments the LPS-induced TLR4 activation and expression of downstream pro-inflammatory molecules, resulting in extensive cartilage degradation. LUM co-stimulation with LPS also provided a pro-inflammatory stimulus, upregulating primary macrophage activation and polarization towards the M1-like phenotype. CONCLUSIONS These findings strongly support the role of LUM as a mediator of PAMP-induced TLR4 activation of inflammation, cartilage degradation, and macrophage polarization in the OA joint and potentially other rheumatic diseases.
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Affiliation(s)
- G Barreto
- Tissue Engineering and Biofabrication, Department of Health Sciences and Technology (D-HEST), ETH Zürich, Zürich, Switzerland
| | - B Senturk
- Laboratory for Biointerfaces, Empa, Swiss Federal Laboratories for Materials Science and Technology, St. Gallen, Switzerland
| | - L Colombo
- Tissue Engineering and Biofabrication, Department of Health Sciences and Technology (D-HEST), ETH Zürich, Zürich, Switzerland
| | - O Brück
- Hematology Research Unit Helsinki, Department of Clinical Chemistry and Hematology, University of Helsinki, Translational Immunology Research Program, University of Helsinki and Helsinki University Hospital Comprehensive Cancer Center, Helsinki, Finland
| | - P Neidenbach
- Lower Extremity Orthopaedics, Musculoskeletal Center, Schulthess Clinic, Zurich, Switzerland
| | - G Salzmann
- Lower Extremity Orthopaedics, Musculoskeletal Center, Schulthess Clinic, Zurich, Switzerland
| | - M Zenobi-Wong
- Tissue Engineering and Biofabrication, Department of Health Sciences and Technology (D-HEST), ETH Zürich, Zürich, Switzerland.
| | - M Rottmar
- Laboratory for Biointerfaces, Empa, Swiss Federal Laboratories for Materials Science and Technology, St. Gallen, Switzerland.
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Carvalho Gontijo C, Porras-Hurtado LG, Freire-Aradas A, Fondevila M, Santos C, Salas A, Henao J, Isaza C, Beltrán L, Nogueira Silbiger V, Castillo A, Ibarra A, Moreno Chavez F, Söchtig J, Ruiz Y, Barreto G, Rondon F, Zabala W, Borjas L, de Oliveira SF, Carracedo A, Lareu MV, Phillips C. PIMA: A population informative multiplex for the Americas. Forensic Sci Int Genet 2019; 44:102200. [PMID: 31760353 DOI: 10.1016/j.fsigen.2019.102200] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 11/01/2019] [Indexed: 11/26/2022]
Abstract
We describe an ancestry-informative autosomal SNP multiplex designed to be a small-scale, flexible panel that can complement uniparental markers in assessing the American variability (i.e. pre-Colombian) found in contemporary indigenous American populations. This study centered on choosing SNPs with the specific characteristics of: 1) extreme allele frequency differences between indigenous Americans and the African, European and East Asian population groups that contribute to present-day population variation in the Americas; 2) high informativeness-for-assignment In values; and 3) well-spaced genomic distribution and chromosomal separation from existing small-scale forensic ancestry marker sets. The resulting capillary electrophoresis SNaPshot single base extension test was named: PIMA (Population Informative Multiplex for the Americas), comprising 26 autosomal SNPs, a single X-chromosome SNP plus the amelogenin sex marker adapted for SNaPshot. PIMA complements the established 34plex forensic ancestry panel to provide a powerful and simple tool for the analysis of American populations, including those with admixed histories, commonly encountered in America. Comparing the results obtained with the combined marker panels of PIMA and 34plex to SNP data from a much larger ancestry panel allowed us to gauge their relative efficiency. PIMA+34plex gives equivalent power to the 314-SNP 'LACE' genomic ancestry control panel, while requiring a much smaller genotyping effort. The ancestry profiles and genetic structure of 22 populations spread across the American continent were estimated using PIMA+34plex data, and those estimates were contrasted with information provided by uniparental markers (mtDNA and Y-chromosome loci) for a small set of admixed individuals from Venezuela. Our results indicate that an American genetic component is efficiently detected in contemporary American populations using a small set of ancestry informative SNPs, and these co-ancestry estimates are consistent with the known history and demography of the Americas. The small scale and high population differentiation power of PIMA, particularly when combined with 34plex, provides a practical and powerful tool for genetic studies of American populations as well as forensic DNA analyses.
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Affiliation(s)
- C Carvalho Gontijo
- Forensic Genetics Unit, University of Santiago de Compostela, Spain; Human Genetics Laboratory, Institute of Biological Sciences, University of Brasília, Brazil
| | - L G Porras-Hurtado
- Forensic Genetics Unit, University of Santiago de Compostela, Spain; Medical Genetics Laboratory, Human Molecular Genetics Research Group, Technology University of Pereira, Colombia
| | - A Freire-Aradas
- Forensic Genetics Unit, University of Santiago de Compostela, Spain
| | - M Fondevila
- Forensic Genetics Unit, University of Santiago de Compostela, Spain
| | - C Santos
- Forensic Genetics Unit, University of Santiago de Compostela, Spain
| | - A Salas
- Forensic Genetics Unit, University of Santiago de Compostela, Spain
| | - J Henao
- Medical Genetics Laboratory, Human Molecular Genetics Research Group, Technology University of Pereira, Colombia
| | - C Isaza
- Medical Genetics Laboratory, Human Molecular Genetics Research Group, Technology University of Pereira, Colombia
| | - L Beltrán
- Medical Genetics Laboratory, Human Molecular Genetics Research Group, Technology University of Pereira, Colombia; Health Science Faculty, Unidad Central del Valle del Cauca, Tulua, Colombia
| | - V Nogueira Silbiger
- Department of Clinical and Toxicological Analysis, Health Sciences Center, Federal University of Rio Grande do Norte, Brazil
| | - A Castillo
- Medical Genetic Laboratory, Industrial University of Santander (UIS), Colombia
| | - A Ibarra
- Medical Genetics Laboratory, University of Antioquia, Colombia
| | - F Moreno Chavez
- Servicio Médico Legal, Ministry of Justice and Human Rights of Chile, Santiago, Chile
| | - J Söchtig
- Forensic Genetics Unit, University of Santiago de Compostela, Spain
| | - Y Ruiz
- Forensic Genetics Unit, University of Santiago de Compostela, Spain
| | - G Barreto
- Human Molecular Genetics Research Group, University of Valle, Colombia
| | - F Rondon
- Department of Clinical and Toxicological Analysis, Health Sciences Center, Federal University of Rio Grande do Norte, Brazil; Human Molecular Genetics Research Group, University of Valle, Colombia
| | - W Zabala
- Molecular Genetics Laboratory, Medical Genetics Unit, University of Zulia, Venezuela
| | - L Borjas
- Molecular Genetics Laboratory, Medical Genetics Unit, University of Zulia, Venezuela
| | - S F de Oliveira
- Human Genetics Laboratory, Institute of Biological Sciences, University of Brasília, Brazil.
| | - A Carracedo
- Forensic Genetics Unit, University of Santiago de Compostela, Spain; Grupo de Medicina Xenómica, CIBERER, University of Santiago de Compostela, Spain
| | - M V Lareu
- Forensic Genetics Unit, University of Santiago de Compostela, Spain
| | - C Phillips
- Forensic Genetics Unit, University of Santiago de Compostela, Spain.
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Contreras G, Pardo V, Cely C, Borja E, Hurtado A, De La Cuesta C, Iqbal K, Lenz O, Asif A, Nahar N, Leclerq B, Leon C, Schulman I, Ramirez-Seijas F, Paredes A, Cepero A, Khan T, Pachon F, Tozman E, Barreto G, Hoffman D, Almeida Suarez M, Busse JC, Esquenazi M, Esquenazi A, Garcia Mayol L, Garcia Estrada H. Factors associated with poor outcomes in patients with lupus nephritis. Lupus 2016; 14:890-5. [PMID: 16335581 DOI: 10.1191/0961203305lu2238oa] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [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: 11/05/2022]
Abstract
The objective of this study was to identify the factors associated with important clinical outcomes in a case-control study of 213 patients with lupus nephritis. Included were 47% Hispanics, 44% African Americans and 9% Caucasians with a mean age of 28 years. Fifty-four (25%) patients reached the primary composite outcome of doubling serum creatinine, end-stage renal disease or death during a mean follow-up of 37 months. Thirty-four percent African Americans, 20% Hispanics and 10% Caucasians reached the primary composite outcome ( P < 0.05). Patients reaching the composite outcome had predominantly proliferative lupus nephritis (WHO classes: 30% III, 32% IV, 18% V and 5% II, P < 0.025) with higher activity index score (7 ± 6 versus 5 ± 5, P<0.05), chronicity index (CI) score (4 ± 3 versus 2 ± 2 unit, P<0.025), higher baseline mean arterial pressure (MAP) (111 ± 21 versus 102 ± 14 mmHg, P<0.025) and serum creatinine (1.9 ± 1.3 versus 1.3 ± 1.0 mg/dL, P<0.025), but lower baseline hematocrit (29 ± 6 versus 31 + 5%, P<0.025) and complement C3 (54 ± 26 versus 65 + 33 mg/dL, P<0.025) compared to controls. More patients reaching the composite outcome had nephrotic range proteinuria compared to controls (74% versus 56%, P<0.025). By multivariate analysis, CI (hazard ratio [95% CI] 1.18 [1.07-1.30] per point), MAP (HR 1.02 [1.00-1.03] per mmHg), and baseline serum creatinine (HR 1.26 [1.04-1.54] per mg/dL) were independently associated with the composite outcome. We concluded that hypertension and elevated serum creatinine at the time of the kidney biopsy as well as a high CI are associated with an increased the risk for chronic renal failure or death in patients with lupus nephritis.
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Affiliation(s)
- G Contreras
- Acute Dialysis Unit Jackson Memorial Hospital, University of Miami Miller School of Medicine, Miami, FL 33101, USA.
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Takakubo Y, Barreto G, Konttinen YT, Oki H, Takagi M. Role of innate immune sensors, TLRs, and NALP3 in rheumatoid arthritis and osteoarthritis. J Long Term Eff Med Implants 2015; 24:243-51. [PMID: 25747027 DOI: 10.1615/jlongtermeffmedimplants.2014011295] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Innate immune sensors, Toll-like receptors (TLRs), and nucleotide-binding oligomerization domain-like receptors (NLRs) participate in the induction of innate inflammatory and adaptive immune responses in rheumatoid arthritis (RA) and osteoarthritis (OA). Danger signals, e.g., heat-shock proteins (HSPs) and high mobility group box-1 protein (HMGB-1), internal ligands of TLRs, have been reported in the patients with RA and OA. In RA, TLR1-9 have been implicated in the pathogenesis. Although the precise role of each receptor is still unknown, immunohistochemical analyses of RA tissues after treatment of biologic disease modifying antirheumatic drugs showed phenotypic changes of immune cell types and residual expression of some TLRs. This suggests the potential for modulation of moderate/severe local joint inflammation, composed in particular of and possibly driven by the "auto-inflammatory" TLR+ cells, still responding to internal ligands derived from destroyed tissues. In OA, systematic profiling of TLR using a histological grading system recently showed that TLR+ cells are greater in number in the surface zone of grades 3 and 4 OA, but interestingly not grade 5. NACHT, LRR, and PYD domains-containing protein (NALP) 3 and related molecules have been also demonstrated both in RA and OA. In addition, a cross talk mechanism of TLR and NALP responsible for increasing joint inflammation has been suggested. Taken together, although OA is not basically an inflammatory disease, and is different from that of RA, pattern recognition receptors-signaling pathways, TLRs and NALP3 may play a role in the pathogenesis of both these conditions, probably as driving forces of progression. Precise and intensive analyses of both receptors, signal pathways, and cross talk mechanisms may provide a new therapeutic approach as molecular targets.
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Affiliation(s)
- Yuya Takakubo
- Department of Orthopaedic Surgery, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - G Barreto
- Department of Clinical Medicine, University of Helsinki and ORTON Orthopaedic Hospital of the Invalid Foundation, Helsinki, Finland
| | - Yrjo T Konttinen
- Department of Clinical Medicine, University of Helsinki and ORTON Orthopaedic Hospital of the Invalid Foundation, Helsinki, Finland
| | - H Oki
- Department of Orthopaedic Surgery, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Michiaki Takagi
- Department of Orthopaedic Surgery Yamagata University School of Medicine Yamagata, Japan
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10
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Cabrera-Fuentes HA, Ruiz-Meana M, Simsekyilmaz S, Kostin S, Inserte J, Saffarzadeh M, Galuska SP, Vijayan V, Barba I, Barreto G, Fischer S, Lochnit G, Ilinskaya ON, Baumgart-Vogt E, Böning A, Lecour S, Hausenloy DJ, Liehn EA, Garcia-Dorado D, Schlüter KD, Preissner KT. RNase1 prevents the damaging interplay between extracellular RNA and tumour necrosis factor-α in cardiac ischaemia/reperfusion injury. Thromb Haemost 2014; 112:1110-9. [PMID: 25354936 DOI: 10.1160/th14-08-0703] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [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: 08/26/2014] [Accepted: 09/20/2014] [Indexed: 12/15/2022]
Abstract
Despite optimal therapy, the morbidity and mortality of patients presenting with an acute myocardial infarction (MI) remain significant, and the initial mechanistic trigger of myocardial "ischaemia/reperfusion (I/R) injury" remains greatly unexplained. Here we show that factors released from the damaged cardiac tissue itself, in particular extracellular RNA (eRNA) and tumour-necrosis-factor α (TNF-α), may dictate I/R injury. In an experimental in vivo mouse model of myocardial I/R as well as in the isolated I/R Langendorff-perfused rat heart, cardiomyocyte death was induced by eRNA and TNF-α. Moreover, TNF-α promoted further eRNA release especially under hypoxia, feeding a vicious cell damaging cycle during I/R with the massive production of oxygen radicals, mitochondrial obstruction, decrease in antioxidant enzymes and decline of cardiomyocyte functions. The administration of RNase1 significantly decreased myocardial infarction in both experimental models. This regimen allowed the reduction in cytokine release, normalisation of antioxidant enzymes as well as preservation of cardiac tissue. Thus, RNase1 administration provides a novel therapeutic regimen to interfere with the adverse eRNA-TNF-α interplay and significantly reduces or prevents the pathological outcome of ischaemic heart disease.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - K T Preissner
- Klaus T. Preissner, PhD, Depart. Biochemistry, Medical School, Justus-Liebig-Universität, Friedrichstrasse 24, 35392 Giessen, Germany, Tel.: +49 641 994 7500; Fax: +49 641 994 7509, E-mail:
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11
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Korfei M, Skwarna S, Klymenko O, Henneke I, der Beck DV, Brand P, Mehta A, Oeztuerk N, Klepetko W, Fink L, Barreto G, Seeger W, Krämer O, Guenther A. Aberrante Expression und Aktivität von Histon-Deacetylasen (HDAC) in Idiopathic Pulmonary Fibrosis (IPF). Pneumologie 2014. [DOI: 10.1055/s-0033-1363115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Korfei M, Skwarna S, Klymenko O, Henneke I, der Beck DV, Brand P, Mehta A, Oeztuerk N, Klepetko W, Fink L, Barreto G, Seeger W, Krämer O, Guenther A. Inhibierung von pro-fibrotischen Signalwegen in Fibroblasten von Patienten mit sporadischer Idiopathischer Pulmonaler Fibrose (IPF) durch Histondeacetylase-Inhibitoren (HDACi). Pneumologie 2014. [DOI: 10.1055/s-0033-1363114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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13
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Grimaldi M, Romer I, de Apodaca MTG, Iturbe L, Catania ID, González J, Kolliker-Fres R, Barreto G, Capani F. Early changes in the synapses of the neostriatum induced by perinatal asphyxia. Nutr Neurosci 2012; 15:103-10. [PMID: 22732353 DOI: 10.1179/1476830511y.0000000026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Perinatal asphyxia (PA) is a medical condition associated with a high short-term morbimortality and different long-term neurological diseases. In previous work we have observed at 6 months post-synaptic densities (PSDs) alterations compatible with neurodegeneration highly correlated with the increment in the ubiquitination. Although alterations in the synaptic organization and function have been related with neuronal death after hypoxia, little is known about the synaptic changes in young animals exposed to PA. The main aim of this work is to study the PSDs changes in striatum of 30-day-old rats subjected to PA. Using two-dimensional electron microscopic analyses of synapses staining with ethanolic phosphotungstic acid we observed an increment of PSD thickness in severe hypoxic rats. These data are consistent with the western blot analysis that showed an increment in ubiquitination levels in the synapses of severe hypoxic rat. We did observe any alterations neither in synaptic structure nor in ubiquitinization in mild asphyctic rats. These data suggest that hypoxia might cause early misfolding and aggregation of synaptic proteins in severe anoxic animas that could induce long-term neurodegeneration.
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Affiliation(s)
- M Grimaldi
- Universidad Argentina John F Kennedy, Buenos Aires, Argentina
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14
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Konttinen YT, Sillat T, Barreto G, Ainola M, Nordström DCE. Editorial: Osteoarthritis as an autoinflammatory disease caused by chondrocyte-mediated inflammatory responses. ACTA ACUST UNITED AC 2012; 64:613-6. [DOI: 10.1002/art.33451] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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15
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Cabrera Fuentes H, Kalacheva N, Mukhametshina R, Zelenikhin P, Kolpakov A, Barreto G, Preissner K, Ilinskaya O. Binase penetration into alveolar epithelial cellsdoes not induce cell death. ACTA ACUST UNITED AC 2012; 58:272-80. [DOI: 10.18097/pbmc20125803272] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Microbial ribonucleases possess a broad spectra of biological activities, demonstrating stimulating properties at low concentrations and cytotoxicity and genotoxicity at high concentrations. The mechanisms of their penetration into the cells are not clear so far. This research is aimed to the study of Bacillus intermedius RNase (binase) penetration in alveolar lung epithelial cells - pneumocytes of type II. Using immunofluorescence we have shown for the first time have internalization of binase by primary non-differentiated pneumocytes АТII. The enzyme did not penetrate in pneumocytes MLE-12, which also derived from type II cells. However, binase was cytotoxic towards tumor MLE-12 cells, but not АТII cells. The obtained results testified the higher sensitivity of tumor cells towards binase compared with normal cells, and also showed that penetration of the enzyme into alveolar cells did not directly correlated with the cell death.
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Affiliation(s)
| | | | | | | | | | - G. Barreto
- Max-Planck-Institute for Heart and Lung Research
| | - K.T. Preissner
- Department of Biochemistry, Medical School, Justus-Liebig-University
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Saraceno G, Ayala M, Badorrey M, Holubiec M, Romero J, Galeano P, Barreto G, Giraldez-Alvárez L, Kölliker-fres R, Coirini H, Capani F. Effects of perinatal asphyxia on rat striatal cytoskeleton. Synapse 2011; 66:9-19. [DOI: 10.1002/syn.20978] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2011] [Accepted: 08/17/2011] [Indexed: 11/11/2022]
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17
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Neves M, Barreto G, Boobis L, Harris R, Roschel H, Tricoli V, Ugrinowitsch C, Negrão C, Gualano B. Incidence of adverse events associated with percutaneous muscular biopsy among healthy and diseased subjects. Scand J Med Sci Sports 2011; 22:175-8. [PMID: 21392121 DOI: 10.1111/j.1600-0838.2010.01264.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The development of the percutaneous muscle biopsy technique is recognized as one of the most important scientific contributions in advancing our understanding of skeletal muscle physiology. However, a concern that this procedure may be associated with adverse events still exists. We reported the incidence of adverse outcomes associated with percutaneous muscle biopsy in healthy and diseased subjects. Medical records of 274 volunteers (496 muscle biopsies) were reviewed. This included 168 healthy subjects (330 muscle biopsies) as well as 106 chronically ill patients (166 muscle biopsies). This latter group encompassed patients with type II diabetes (n=28), osteoarthritis (n=39), inclusion body myositis (n=4), polymyositis (n=4), and chronic heart failure (n=31). The most common occurrences were pain (1.27%), erythema (1.27%), and ecchymosis (1.27%). Panic episode, bleeding, and edema were also reported (0.21%, 0.42%, and 0.84%, respectively), while infection, hematoma, inflammation, denervation, numbness, atrophy, and abnormal scarring were not verified. The percent of incidents did not differ between healthy and ill individuals. In conclusion, the incidence of complications associated with percutaneous muscle biopsy is scarce and of minor clinical relevance. Additionally, the rate of adverse events is comparable between healthy and chronically ill subjects.
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Affiliation(s)
- M Neves
- Division of Rheumatology, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
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18
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Rayan DR, Matthews E, Rajakulendran S, Barreto G, Tan S, Dewar L, Burge J, Griggs R, Barohn R, Hanna M. P27 Genotype-phenotype correlation and longitudinal three year natural history study in the non-dystrophic myotonias in the UK. Neuromuscul Disord 2011. [DOI: 10.1016/s0960-8966(11)70046-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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19
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Choudhury R, Barreto G, Ganeshaguru K, Cirak S, Scoto M, Muntoni F, Guglieri M, Straub V, Bell G, Speed C, Bourke J, Bushby K, Quinlivan R, Jones R, Hunt A. P07 Translation related clinical trials in duchenne muscular dystrophy (DMD) in the UK. Neuromuscul Disord 2010. [DOI: 10.1016/s0960-8966(10)70022-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Abstract
Pancreatic cancer is a devastating disease with a dismal prognosis and early detection remains a challenge. On the background that inflammation is one of the key steps in the development of cancer, it is natural that chronic pancreatitis is considered as one of the etiological factors for the development of pancreatic cancer. However, the process of pancreatic carcinogenesis is a multifactorial phenomenon rather than a process that evolves solely via inflammation. This review attempts to put into perspective the association between different etiological forms of chronic pancreatitis and pancreatic cancer, and the diverse mechanisms operational in the process of pancreatic carcinogenesis. Furthermore, the clinical relevance of the current understanding of the relationship between chronic pancreatitis and pancreatic cancer, especially with regard to the pancreatic head mass of uncertain etiology, is discussed in this review.
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Affiliation(s)
- S V Shrikhande
- Department of Gastrointestinal Surgical Oncology, Tata Memorial Hospital, Mumbai, India.
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21
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Porras L, Phillips C, Fondevila M, Beltrán L, Ortiz T, Rondon F, Barreto G, Lareu MV, Henao J, Carracedo A. Genetic variability of the SNPforID 52-plex identification-SNP panel in Central West Colombia. Forensic Sci Int Genet 2009; 4:e9-10. [PMID: 19948327 DOI: 10.1016/j.fsigen.2008.12.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2008] [Accepted: 12/08/2008] [Indexed: 10/21/2022]
Abstract
A set of autosomal single nucleotide polymorphism (SNP) loci was analyzed using the 52-plex assay previously described by Sanchez et al. [J.J. Sanchez, C. Phillips, C. Borsting, K. Balogh, M. Bogus, M. Fondevila, C.D. Harrison, E. Musgrave-Brown, A. Salas, D. Syndercombe-Court, P.M. Schneider, A. Carracedo, N. Morling, A multiplex assay with 52 single nucleotide polymorphisms for human identification, Electrophoresis 27 (2006) 1713-1724] in 140 samples of unrelated individuals born in the Colombian regions of, Risaralda, Caldas, Quindio, Antioquia, Tolima and Valle, and 164 samples of unrelated individuals with declared Native American ancestry from Colombia. Allele frequencies and statistical parameters of forensic interest are presented for the 52 SNPs. All loci were in agreement with Hardy-Weinberg equilibrium while comparisons with population samples of Argentina, Portugal, Spain, Mozambique, and Taiwan revealed significant differences in allele frequency distributions.
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Affiliation(s)
- L Porras
- Medical Genetic Laboratory, Universidad Tecnológica de Pereira, Colombia
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22
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Shukla PJ, Barreto G, Kakade A, Shrikhande SV. Revision surgery for incidental gallbladder cancer: factors influencing operability and further evidence for T1b tumours. HPB (Oxford) 2008; 10:43-7. [PMID: 18695758 PMCID: PMC2504853 DOI: 10.1080/13651820701867794] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [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: 12/12/2007] [Indexed: 02/06/2023]
Abstract
BACKGROUND AND AIM There is a need to increase the available data on revision radical surgery for incidental gallbladder cancer and to determine factors influencing operability. We aimed to assess the impact of stage of disease (pT) and the type of primary surgery (laparoscopy versus open) on resectability rates. MATERIAL AND METHODS The data of 90 consecutive patients referred to the Tata Memorial Hospital between 1 January 2003 and 30 April 2007 for revision radical surgery for incidental gallbladder cancer were reviewed retrospectively. RESULTS Of the 90 patients who underwent revision surgery, accurate data on T-stage was available in 76, and of these 76 patients, 44 (57.8%) had prior laparoscopic simple cholecystectomy, while 32 (42.2%) had undergone open surgery. The median time interval between the two surgeries was 2 months (range 4 weeks to 11 months). By T-stage, 23 patients had T1b disease, while 33 and 20 patients had T2 and T3 disease, respectively. Successful revision surgery could be undertaken in 71% of patients (54/76) and 29.6% of these had residual disease confirmed by histopathological examination. CONCLUSIONS T-stage is an important factor in determining operability as confirmed by our study. As the T-stage of the disease increased, the chances of finding residual disease increased, while operability decreased. Furthermore, the case for revision surgery is strengthened because the incidence of lymph nodal disease is high even for pT1b cancers. The type of primary surgery does not affect operability in patients undergoing revision radical surgery for incidental gallbladder cancer.
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Affiliation(s)
- P. J. Shukla
- Department of Gastrointestinal Surgical Oncology, Tata Memorial HospitalMumbaiIndia
| | - G. Barreto
- Department of Gastrointestinal Surgical Oncology, Tata Memorial HospitalMumbaiIndia
| | - A. Kakade
- Clinical Research Secretariat, Tata Memorial HospitalMumbaiIndia
| | - S. V. Shrikhande
- Department of Gastrointestinal Surgical Oncology, Tata Memorial HospitalMumbaiIndia
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23
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Shukla PJ, Barreto G, Pandey D, Kanitkar G, Nadkarni MS, Neve R, Shrikhande SV. Modification in the technique of pancreaticoduodenectomy: supracolic division of jejunum to facilitate uncinate process dissection. Hepatogastroenterology 2007; 54:1728-1730. [PMID: 18019705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Pancreaticoduodenectomy remains the recommended procedure for periampullary and pancreatic head tumors. The dissection of the uncinate process from the superior mesenteric vessels is a key step in this surgery. We describe a modification in the existing practice of infracolic division of the jejunum in order to facilitate this step. In this modification, the duodenojejunal (DJ) flexure and the proximal jejunum are delivered into the supracolic compartment and then the jejunum is divided. This exposes the uncinate process completely and facilitates the separation from the Superior Mesenteric Artery (SMA) and the Superior Mesenteric Vein (SMV). We have successfully employed this modified technique for 33 resections since February 2004. This modification of dividing the jejunum in the supracolic compartment is based on sound anatomic and embryologic grounds. It helps in aligning the uncinate process with the jejunal mesentery thereby making the dissection of uncinate process from the superior mesenteric vessels safe and complete.
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Affiliation(s)
- P J Shukla
- Department of Gastrointestinal and Hepatopancreatobiliary Surgical Oncology, Tata Memorial Hospital, Mumbai, India.
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Barreto G, Neve R, Shrikhande SV, Shukla PJ. Role of circulating tumour cells in predicting recurrence after excision of primary colorectal carcinoma (Br J Surg 2007; 94: 96-105). Br J Surg 2007; 94:644; author reply 644-5. [PMID: 17443880 DOI: 10.1002/bjs.5871] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Shukla PJ, Barreto G, Shrikhande SV. Is it possible to retrospectively evaluate multivisceral resections for locally advanced colorectal cancer in a population? Natl Med J India 2007; 20:22-3. [PMID: 17557518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Affiliation(s)
- P J Shukla
- Department of Gastrointestinal Surgical Oncology Tata Memorial Hospital, Parel, Munbai.
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27
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Lutz M, Burke LJ, Barreto G, Goeman F, Greb H, Arnold R, Schultheiss H, Brehm A, Kouzarides T, Lobanenkov V, Renkawitz R. Transcriptional repression by the insulator protein CTCF involves histone deacetylases. Nucleic Acids Res 2000; 28:1707-13. [PMID: 10734189 PMCID: PMC102824 DOI: 10.1093/nar/28.8.1707] [Citation(s) in RCA: 113] [Impact Index Per Article: 4.7] [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: 11/13/2022] Open
Abstract
The highly conserved zinc-finger protein, CTCF, is a candidate tumor suppressor protein that binds to highly divergent DNA sequences. CTCF has been connected to multiple functions in chromatin organization and gene regulation including chromatin insulator activity and transcriptional enhancement and silencing. Here we show that CTCF harbors several autonomous repression domains. One of these domains, the zinc-finger cluster, silences transcription in all cell types tested and binds directly to the co-repressor SIN3A. Two distinct regions of SIN3A, the PAH3 domain and the extreme C-terminal region, bind independently to this zinc-finger cluster. Analysis of nuclear extract from HeLa cells revealed that CTCF is also capable of retaining functional histone deacetylase activity. Furthermore, the ability of regions of CTCF to retain deacetylase activity correlates with the ability to bind to SIN3A and to repress gene activity. We suggest that CTCF driven repression is mediated in part by the recruitment of histone deacetylase activity by SIN3A.
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Affiliation(s)
- M Lutz
- Genetisches Institut der Justus-Liebig-Universität, Heinrich-Buff-Ring 58-62, 35392 Giessen, Germany
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Abstract
CONTEXT Parapharyngeal space tumors comprise less than 0.5% of all head and neck neoplasms. The majority of these tumors are benign, but surgery is usually required to establish the diagnosis and treat the patients. We present 26 patients treated surgically for tumors arising in the parapharyngeal space (PPS) at the State University of Campinas Hospital--UNICAMP. CASES SERIES Of these, 17 (65.5%) had benign and 9 (34.6%) malignant neoplasms. The surgical and pathological data relevant to these cases are highlighted, observing any local recurrence, surgical complications and the five-year survival. Neurogenic tumors and soft tissue sarcomas were, respectively, the most frequent benign (35.3%) and malignant neoplasms (44.5%). Benign tumors accounted for the majority of the cases and involved minimal surgical morbidity with no recurrence during a median follow-up of five years. Malignant tumors had a high rate of recurrence and mortality. Surgery is the treatment of choice for PPS tumors. A knowledge of the anatomy of this site is essential for the safe performance of surgical procedures. Malignant neoplasms have a poor prognosis. Fine needle aspiration was helpful in diagnosis of all tumors.
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Affiliation(s)
- A J Tincani
- Department of Surgery, Faculdade de Ciências Médicas, Universidade Estadual de Campinas (UNICAMP), Brazil
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Colmenero F, Carrascosa A, Barreto G, Fernandez P, Carballo J. Chopping temperature effects on the characteristics and chilled storage of low- and high-fat pork Bologna sausages. Meat Sci 1996; 44:1-9. [DOI: 10.1016/s0309-1740(96)00090-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/1995] [Revised: 06/18/1996] [Accepted: 07/02/1996] [Indexed: 11/25/2022]
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30
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Barreto G, Carballo J, Fernández-Martin F, Jiménez Colmenero F. Thermal gelation of meat batters as a function of type and level of fat and protein content. Z Lebensm Unters Forsch 1996; 202:211-4. [PMID: 8721220 DOI: 10.1007/bf01263542] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The rheological behaviour of meat batters during heating was analysed as a function of protein level (10-16%), type (pork back or perirenal/peritoneal fat) and amount (10-22%) of fat used. Fat thermal behaviour was studied by differential scanning calorimetry and rheological properties of batters were assessed using non-destructive measurements (thermal scanning rigidity monitor). The higher the protein content, the higher were the rigidity values displayed by the batters, irrespective of fat type, although the magnitude of these values appeared to be dependent on the amount and characteristics of the fat. The lower the fat content, the lower were the rigidity values of the batters. This behaviour pattern was influenced by the amount of protein present. In general, samples containing perirenal/peritoneal fat exhibited lower rigidity values at high temperatures, whereas at less than 35-40 degrees C, the opposite appeared to be the case.
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Affiliation(s)
- G Barreto
- Instituto del Frío, Ciudad Universitaria, Mardrid, Spain
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Barreto G, Vago AR, Ginther C, Simpson AJ, Pena SD. Mitochondrial D-loop "signatures" produced by low-stringency single specific primer PCR constitute a simple comparative human identity test. Am J Hum Genet 1996; 58:609-16. [PMID: 8644720 PMCID: PMC1914581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
We have developed a technique called "LSSP-PCR" (low-stringency single specific primer PCR) that detects single or multiple mutations in DNA. A purified DNA fragment is submitted to PCR by using a single primer specific for one of the extremities of the fragment, under conditions of very low stringency. The primer hybridizes specifically to its complementary extremity and nonspecifically to multiple sites within the fragment, in a sequence-dependent manner. A complex set of reaction products is thus created that, when separated by electrophoresis, constitutes a unique "gene signature." We here report the application of LSSP-PCR to the detection of sequence variation in the control (D-loop) region of human mtDNA, which is known to differ significantly between unrelated individuals. We prepared human DNA samples from blood and amplified a 1024-bp portion of the mtDNA control region, using primers L15996 and H408. The amplified mtDNA fragments were then reamplified under LSSP-PCR conditions by using L15996 or H408 as drivers to produce complex signatures that always differed between unrelated individuals and yet were highly reproducible. In contrast, all mother-child pairs tested were identical, as expected from the matrilineal inheritance of mtDNA. Thus, the use of LSSP-PCR to produce D-loop signatures constitutes a powerful new technique for mtDNA-based comparative identity testing.
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Affiliation(s)
- G Barreto
- Departamento de Bioquímica, Universidade Federal de Mintas Gerias, Brazil
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32
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Colmenero F, Barreto G, Fernández P, Carballo J. Frozen storage of Bologna sausages as a function of fat content and of levels of added starch and egg white. Meat Sci 1996; 42:325-32. [DOI: 10.1016/0309-1740(94)00039-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/1995] [Revised: 07/10/1995] [Accepted: 07/17/1995] [Indexed: 10/18/2022]
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Carballo J, Mota N, Barreto G, Colmenero F. Binding properties and colour of Bologna sausage made with varying fat levels, protein levels and cooking temperatures. Meat Sci 1995; 41:301-13. [DOI: 10.1016/0309-1740(95)00001-2] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/1994] [Revised: 12/01/1994] [Accepted: 12/01/1994] [Indexed: 11/16/2022]
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Pena SD, Barreto G, Vago AR, De Marco L, Reinach FC, Dias Neto E, Simpson AJ. Sequence-specific "gene signatures" can be obtained by PCR with single specific primers at low stringency. Proc Natl Acad Sci U S A 1994; 91:1946-9. [PMID: 8127912 PMCID: PMC43281 DOI: 10.1073/pnas.91.5.1946] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Low-stringency single specific primer PCR (LSSP-PCR) is an extremely simple PCR-based technique that detects single or multiple mutations in gene-sized DNA fragments. A purified DNA fragment is subjected to PCR using high concentrations of a single specific oligonucleotide primer, large amounts of Taq polymerase, and a very low annealing temperature. Under these conditions the primer hybridizes specifically to its complementary region and nonspecifically to multiple sites within the fragment, in a sequence-dependent manner, producing a heterogeneous set of reaction products resolvable by electrophoresis. The complex banding pattern obtained is significantly altered by even a single-base change and thus constitutes a unique "gene signature." Therefore LSSP-PCR will have almost unlimited application in all fields of genetics and molecular medicine where rapid and sensitive detection of mutations and sequence variations is important. The usefulness of LSSP-PCR is illustrated by applications in the study of mutants of smooth muscle myosin light chain, analysis of a family with X-linked nephrogenic diabetes insipidus, and identity testing using human mitochondrial DNA.
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Affiliation(s)
- S D Pena
- Núcleo de Genética Médica de Minas Gerais (GENE/MG), Belo Horizonte, Brazil
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