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Ramaboli MC, Ocvirk S, Khan Mirzaei M, Eberhart BL, Valdivia-Garcia M, Metwaly A, Neuhaus K, Barker G, Ru J, Nesengani LT, Mahdi-Joest D, Wilson AS, Joni SK, Layman DC, Zheng J, Mandal R, Chen Q, Perez MR, Fortuin S, Gaunt B, Wishart D, Methé B, Haller D, Li JV, Deng L, Swart R, O'Keefe SJD. Diet changes due to urbanization in South Africa are linked to microbiome and metabolome signatures of Westernization and colorectal cancer. Nat Commun 2024; 15:3379. [PMID: 38643180 PMCID: PMC11032404 DOI: 10.1038/s41467-024-46265-0] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 02/15/2024] [Indexed: 04/22/2024] Open
Abstract
Transition from traditional high-fiber to Western diets in urbanizing communities of Sub-Saharan Africa is associated with increased risk of non-communicable diseases (NCD), exemplified by colorectal cancer (CRC) risk. To investigate how urbanization gives rise to microbial patterns that may be amenable by dietary intervention, we analyzed diet intake, fecal 16 S bacteriome, virome, and metabolome in a cross-sectional study in healthy rural and urban Xhosa people (South Africa). Urban Xhosa individuals had higher intakes of energy (urban: 3,578 ± 455; rural: 2,185 ± 179 kcal/d), fat and animal protein. This was associated with lower fecal bacteriome diversity and a shift from genera favoring degradation of complex carbohydrates (e.g., Prevotella) to taxa previously shown to be associated with bile acid metabolism and CRC. Urban Xhosa individuals had higher fecal levels of deoxycholic acid, shown to be associated with higher CRC risk, but similar short-chain fatty acid concentrations compared with rural individuals. Fecal virome composition was associated with distinct gut bacterial communities across urbanization, characterized by different dominant host bacteria (urban: Bacteriodota; rural: unassigned taxa) and variable correlation with fecal metabolites and dietary nutrients. Food and skin microbiota samples showed compositional differences along the urbanization gradient. Rural-urban dietary transition in South Africa is linked to major changes in the gut microbiome and metabolome. Further studies are needed to prove cause and identify whether restoration of specific components of the traditional diet will arrest the accelerating rise in NCDs in Sub-Saharan Africa.
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Affiliation(s)
- M C Ramaboli
- African Microbiome Institute, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - S Ocvirk
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
- Intestinal Microbiology Research Group, German Institute of Human Nutrition, Potsdam, Germany
- ZIEL - Institute for Food and Health, Technical University of Munich, Freising, Germany
| | - M Khan Mirzaei
- Institute of Virology, Helmholtz Centre Munich - German Research Centre for Environmental Health, Neuherberg, Germany
- Chair of Microbial Disease Prevention, School of Life Sciences, Technical University of Munich, Freising, Germany
| | - B L Eberhart
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - M Valdivia-Garcia
- Section of Nutrition, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, UK
| | - A Metwaly
- Chair of Nutrition and Immunology, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - K Neuhaus
- Core Facility Microbiome, ZIEL - Institute for Food and Health, Technical University of Munich, Freising, Germany
| | - G Barker
- Section of Nutrition, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, UK
| | - J Ru
- Institute of Virology, Helmholtz Centre Munich - German Research Centre for Environmental Health, Neuherberg, Germany
- Chair of Microbial Disease Prevention, School of Life Sciences, Technical University of Munich, Freising, Germany
| | - L T Nesengani
- Department of Agriculture and Animal Health, University of South Africa, Pretoria, South Africa
| | - D Mahdi-Joest
- Intestinal Microbiology Research Group, German Institute of Human Nutrition, Potsdam, Germany
| | - A S Wilson
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - S K Joni
- Department of Nutrition and Dietetics, School of Public Health, University of the Western Cape, Cape Town, South Africa
| | - D C Layman
- Department of Nutrition and Dietetics, School of Public Health, University of the Western Cape, Cape Town, South Africa
| | - J Zheng
- The Metabolomics Innovation Centre & Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - R Mandal
- The Metabolomics Innovation Centre & Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Q Chen
- Section of Nutrition, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, UK
| | - M R Perez
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - S Fortuin
- African Microbiome Institute, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - B Gaunt
- Zithulele Hospital, Mqanduli District, Mqanduli, Eastern Cape Province, South Africa
| | - D Wishart
- The Metabolomics Innovation Centre & Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - B Methé
- Center for Medicine and the Microbiome, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - D Haller
- ZIEL - Institute for Food and Health, Technical University of Munich, Freising, Germany
- Chair of Nutrition and Immunology, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - J V Li
- Section of Nutrition, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, UK
| | - L Deng
- Institute of Virology, Helmholtz Centre Munich - German Research Centre for Environmental Health, Neuherberg, Germany
- Chair of Microbial Disease Prevention, School of Life Sciences, Technical University of Munich, Freising, Germany
| | - R Swart
- Department of Nutrition and Dietetics, School of Public Health, University of the Western Cape, Cape Town, South Africa
| | - S J D O'Keefe
- African Microbiome Institute, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa.
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA.
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Bertoglio P, Ventura L, Aprile V, Cattoni MA, Nachira D, Lococo F, Rodriguez Perez M, Guerrera F, Minervini F, Gnetti L, Lenzini A, Franzi F, Querzoli G, Rindi G, Bellafiore S, Femia F, Bogina GS, Bacchin D, Kestenholz P, Ruffini E, Paci M, Margaritora S, Imperatori AS, Lucchi M, Ampollini L, Terzi AC. OUP accepted manuscript. Interact Cardiovasc Thorac Surg 2022; 35:6533422. [PMID: 35188192 PMCID: PMC9252107 DOI: 10.1093/icvts/ivac047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 12/08/2021] [Accepted: 12/17/2021] [Indexed: 11/14/2022] Open
Affiliation(s)
- Pietro Bertoglio
- Division of Thoracic Surgery, IRCCS Azienda Ospedaliero-Universitaria of Bologna, Bologna, Italy
- Corresponding author. Division of Thoracic Surgery, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Largo Nigrisoli 1, Bologna 40133, Italy. Tel: +39-516478362; e-mail: (P. Bertoglio)
| | - Luigi Ventura
- Division of Thoracic Surgery, University Hospital of Parma, Parma, Italy
| | - Vittorio Aprile
- Division of Thoracic Surgery, University Hospital of Pisa, Pisa, Italy
| | | | - Dania Nachira
- Department of General Thoracic Surgery, Fondazione Policlinico “A. Gemelli”-Catholic University of Sacred Heart, Rome, Italy
| | - Filippo Lococo
- Department of General Thoracic Surgery, Fondazione Policlinico “A. Gemelli”-Catholic University of Sacred Heart, Rome, Italy
| | | | | | - Fabrizio Minervini
- Division of Thoracic Surgery. Cantonal Hospital Lucerne, Lucerne, Switzerland
| | - Letizia Gnetti
- Division of Pathological Anatomy, University Hospital of Parma, Parma, Italy
| | | | - Francesca Franzi
- Division of Pathological Anatomy, University of Insubria, Varese, Italy
| | - Giulia Querzoli
- Division of Pathological Anatomy, IRCCS Sacro Cuore Don Calabria Hospital, Verona, Italy
| | - Guido Rindi
- Division of Pathological Anatomy, Fondazione Policlinico “A. Gemelli”-Catholic University of Sacred Heart, Rome, Italy
| | - Salvatore Bellafiore
- Division of Pathological Anatomy, Azienda USL di Reggio Emilia-IRCCS, Reggio Emilia, Italy
| | - Federico Femia
- Division of Thoracic Surgery, University of Torino, Torino, Italy
| | | | - Diana Bacchin
- Division of Thoracic Surgery, University Hospital of Pisa, Pisa, Italy
| | - Peter Kestenholz
- Division of Thoracic Surgery. Cantonal Hospital Lucerne, Lucerne, Switzerland
| | - Enrico Ruffini
- Division of Thoracic Surgery, University of Torino, Torino, Italy
| | - Massimiliano Paci
- Division of Thoracic Surgery, Azienda USL di Reggio Emilia-IRCCS, Reggio Emilia, Italy
| | - Stefano Margaritora
- Department of General Thoracic Surgery, Fondazione Policlinico “A. Gemelli”-Catholic University of Sacred Heart, Rome, Italy
| | | | - Marco Lucchi
- Division of Thoracic Surgery, University Hospital of Pisa, Pisa, Italy
| | - Luca Ampollini
- Division of Thoracic Surgery, University Hospital of Parma, Parma, Italy
| | - Alberto Claudio Terzi
- Division of Thoracic Surgery, IRCCS Sacro Cuore Don Calabria Hospital, Verona, Italy
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Bertoglio P, Ventura L, Aprile V, Cattoni MA, Nachira D, Lococo F, Rodriguez Perez M, Guerrera F, Minervini F, Gnetti L, Bacchin D, Franzi F, Querzoli G, Rindi G, Bellafiore S, Femia F, Viti A, Kestenholz P, Ruffini E, Paci M, Margaritora S, Imperatori AS, Lucchi M, Carbognani P, Terzi AC. Prognostic role of standard uptake value according to pathologic features of lung adenocarcinoma. Tumori 2021; 108:461-469. [PMID: 34039110 DOI: 10.1177/03008916211018515] [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: 11/16/2022]
Abstract
OBJECTIVE To evaluate the influence of lung adenocarcinoma second predominant pattern on the maximal standard uptake value (SUVmax) and its prognostic effect in different histologic groups. METHODS We retrospectively collected surgically resected pathologic stage I and II lung adenocarcinoma from nine European institutions. Only patients who underwent preoperative PET-CT and with available information regarding SUVmax of T (SUVmaxT) and N1 (SUVmaxN1) component were included. RESULTS We enrolled 344 patients with lung adenocarcinoma. SUVmaxT did not show any significant relation according to the second predominant pattern (p = 0.139); this relationship remained nonsignificant in patients with similar predominant pattern. SUVmaxT influenced the disease-free survival in the whole cohort (p = 0.002) and in low- and intermediate-grade predominant pattern groups (p = 0.040 and p = 0.008, respectively). In the high-grade predominant pattern cohort and in the pathologic N1 cases, SUVmaxT lost its prognostic power. SUVmaxN1 did not show any significant correlation with predominant and second predominant patterns and did not have any prognostic impact on DFS. CONCLUSIONS SUVmaxT is influenced only by the adenocarcinoma predominant pattern, but not by second predominant pattern. Concurrently, in high-grade predominant pattern and pN1 group the prognostic power of SUVmaxT becomes nonsignificant.
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Affiliation(s)
- Pietro Bertoglio
- Division of Thoracic Surgery, IRCCS Azienda Ospedaliero-Universitaria of Bologna, Bologna, Italy
| | - Luigi Ventura
- Division of Thoracic Surgery, University Hospital of Parma, Parma, Italy
| | - Vittorio Aprile
- Division of Thoracic Surgery, University Hospital of Pisa, Pisa, Italy
| | | | - Dania Nachira
- Department of General Thoracic Surgery, Fondazione Policlinico "A. Gemelli"-Catholic University of Sacred Heart, Rome, Italy
| | - Filippo Lococo
- Department of General Thoracic Surgery, Fondazione Policlinico "A. Gemelli"-Catholic University of Sacred Heart, Rome, Italy
| | | | | | - Fabrizio Minervini
- Division of Thoracic Surgery, Cantonal Hospital Lucerne, Lucerne, Switzerland
| | - Letizia Gnetti
- Division of Pathological Anatomy, University Hospital of Parma, Parma, Italy
| | - Diana Bacchin
- Division of Thoracic Surgery, University Hospital of Pisa, Pisa, Italy
| | - Francesca Franzi
- Division of Pathological Anatomy, University of Insubria, Varese, Italy
| | - Giulia Querzoli
- Division of Pathological Anatomy, IRCCS Sacro Cuore Don Calabria Hospital, Negrar Di Valpolicella, Verona, Italy
| | - Guido Rindi
- Division of Pathological Anatomy, Fondazione Policlinico "A.Gemelli"-Catholic University of Sacred Heart, Rome, Italy
| | - Salvatore Bellafiore
- Division of Pathological Anatomy, Azienda USL di Reggio Emilia-IRCCS, Reggio Emilia, Italy
| | - Federico Femia
- Division of Thoracic Surgery, University of Torino, Torino, Italy
| | - Andrea Viti
- Division of Thoracic Surgery, IRCCS Sacro Cuore Don Calabria Hospital, Negrar Di Valpolicella, Verona, Italy
| | - Peter Kestenholz
- Division of Thoracic Surgery, Cantonal Hospital Lucerne, Lucerne, Switzerland
| | - Enrico Ruffini
- Division of Thoracic Surgery, University of Torino, Torino, Italy
| | - Massimiliano Paci
- Division of Thoracic Surgery, Azienda USL di Reggio Emilia-IRCCS, Reggio Emilia, Italy
| | - Stefano Margaritora
- Department of General Thoracic Surgery, Fondazione Policlinico "A. Gemelli"-Catholic University of Sacred Heart, Rome, Italy
| | | | - Marco Lucchi
- Division of Thoracic Surgery, University Hospital of Pisa, Pisa, Italy
| | - Paolo Carbognani
- Division of Thoracic Surgery, University Hospital of Parma, Parma, Italy
| | - Alberto Claudio Terzi
- Division of Thoracic Surgery, IRCCS Sacro Cuore Don Calabria Hospital, Negrar Di Valpolicella, Verona, Italy
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Bertoglio P, Querzoli G, Ventura L, Aprile V, Cattoni MA, Nachira D, Lococo F, Rodriguez Perez M, Guerrera F, Minervini F, Gnetti L, Bacchin D, Franzi F, Rindi G, Bellafiore S, Femia F, Viti A, Bogina GS, Kestenholz P, Ruffini E, Paci M, Margaritora S, Imperatori AS, Lucchi M, Ampollini L, Terzi AC. Prognostic impact of lung adenocarcinoma second predominant pattern from a large European database. J Surg Oncol 2020; 123:560-569. [PMID: 33169397 DOI: 10.1002/jso.26292] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 09/16/2020] [Revised: 10/28/2020] [Accepted: 10/29/2020] [Indexed: 11/09/2022]
Abstract
BACKGROUND AND OBJECTIVES Adenocarcinoma patterns could be grouped based on clinical behaviors: low- (lepidic), intermediate- (papillary or acinar), and high-grade (micropapillary and solid). We analyzed the impact of the second predominant pattern (SPP) on disease-free survival (DFS). METHODS We retrospectively collected data of surgically resected stage I and II adenocarcinoma. SELECTION CRITERIA anatomical resection with lymphadenectomy and pathological N0. Pure adenocarcinomas and mucinous subtypes were excluded. Recurrence rate and factors affecting DFS were analyzed according to the SPP focusing on intermediate-grade predominant pattern adenocarcinomas. RESULTS Among 270 patients, 55% were male. The mean age was 68.3 years. SPP pattern appeared as follows: lepidic 43.0%, papillary 23.0%, solid 14.4%, acinar 11.9%, and micropapillary 7.8%. The recurrence rate was 21.5% and 5-year DFS was 71.1%. No difference in DFS was found according to SPP (p = .522). In patients with high-grade SPP, the percentage of SPP, age, and tumor size significantly influenced DFS (p = .016). In patients with lepidic SPP, size, male gender, and lymph-node sampling (p = .005; p = .014; p = .038, respectively) significantly influenced DFS. CONCLUSIONS The impact of SPP on DFS is not homogeneous in a subset of patients with the intermediate-grade predominant patterns. The influence of high-grade SPP on DFS is related to its proportion in the tumor.
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Affiliation(s)
- Pietro Bertoglio
- Division of Thoracic Surgery, IRCCS Sacro Cuore Don Calabria Hospital, Verona, Italy
| | - Giulia Querzoli
- Division of Pathological Anatomy, IRCCS Sacro Cuore Don Calabria Hospital, Verona, Italy
| | - Luigi Ventura
- Division of Thoracic Surgery, University Hospital of Parma, Parma, Italy
| | - Vittorio Aprile
- Division of Thoracic Surgery, University Hospital of Pisa, Pisa, Italy
| | - Maria A Cattoni
- Division of Thoracic Surgery, University of Insubria, Varese, Italy
| | - Dania Nachira
- Department of General Thoracic Surgery, Fondazione Policlinico "A.Gemelli" - Catholic, University of Sacred Heart, Rome, Italy
| | - Filippo Lococo
- Department of General Thoracic Surgery, Fondazione Policlinico "A.Gemelli" - Catholic, University of Sacred Heart, Rome, Italy
| | | | | | - Fabrizio Minervini
- Division of Thoracic Surgery, Cantonal Hospital Lucerne, Lucerne, Switzerland
| | - Letizia Gnetti
- Division of Pathological Anatomy, University Hospital of Parma, Parma, Italy
| | - Diana Bacchin
- Division of Thoracic Surgery, University Hospital of Pisa, Pisa, Italy
| | - Francesca Franzi
- Division of Pathological Anatomy, University of Insubria, Varese, Italy
| | - Guido Rindi
- Division of Pathological Anatomy, Fondazione Policlinico "A.Gemelli" - Catholic, University of Sacred Heart, Rome, Italy
| | - Salvatore Bellafiore
- Division of Pathological Anatomy, Azienda USL di Reggio Emilia-IRCCS, Reggio Emilia, Italy
| | - Federico Femia
- Division of Thoracic Surgery, University of Torino, Torino, Italy
| | - Andrea Viti
- Division of Thoracic Surgery, IRCCS Sacro Cuore Don Calabria Hospital, Verona, Italy
| | - Giuseppe S Bogina
- Division of Pathological Anatomy, IRCCS Sacro Cuore Don Calabria Hospital, Verona, Italy
| | - Peter Kestenholz
- Division of Thoracic Surgery, Cantonal Hospital Lucerne, Lucerne, Switzerland
| | - Enrico Ruffini
- Division of Thoracic Surgery, University of Torino, Torino, Italy
| | - Massimiliano Paci
- Division of Thoracic Surgery, Azienda USL di Reggio Emilia-IRCCS, Reggio Emilia, Italy
| | - Stefano Margaritora
- Department of General Thoracic Surgery, Fondazione Policlinico "A.Gemelli" - Catholic, University of Sacred Heart, Rome, Italy
| | | | - Marco Lucchi
- Division of Thoracic Surgery, University Hospital of Pisa, Pisa, Italy
| | - Luca Ampollini
- Division of Thoracic Surgery, University Hospital of Parma, Parma, Italy
| | - Alberto C Terzi
- Division of Thoracic Surgery, IRCCS Sacro Cuore Don Calabria Hospital, Verona, Italy
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Li X, Kang Y, Roife D, Lee Y, Pratt M, Perez MR, Dai B, Koay EJ, Fleming JB. Prolonged exposure to extracellular lumican restrains pancreatic adenocarcinoma growth. Oncogene 2017; 36:5432-5438. [PMID: 28534517 DOI: 10.1038/onc.2017.125] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 03/17/2017] [Accepted: 03/23/2017] [Indexed: 12/22/2022]
Abstract
We previously demonstrated that pancreatic stellate cells within pancreatic ductal adenocarcinoma (PDAC) stroma secrete lumican and its presence is associated with prolonged survival of patients with localized PDAC. Here, we observed that extracellular lumican decreases PDAC tumour cell growth in xenograft and syngeneic orthotopic animal models, and induces growth inhibition of low-passage human PDAC cells in a species-specific manner. PDAC cells grown in variant culture conditions and exposed to extracellular lumican display typical characterizations of cancer cell in a quiescent state, such as growth inhibition, apoptosis, G0/G1 arrest and chemoresistance. Importantly, extracellular lumican is associated with diminished ERK1/2 phosphorylation and increased p38 phosphorylation within PDAC cells. We further demonstrated that extracellular lumican physically binds with EGFR to trigger EGFR internalization and downregulation of EGFR and its downstream signal molecule ERK. Lumican enhances casitas B-lineage lymphoma expression, which stabilized the TGFβ Type II receptor sensitizing PDAC cells to TGFβ-mediated activation of p38 and SMAD signals. These provide a mechanism for the shift in signalling and phenotypic changes we observed after prolonged exposure to lumican. Together, our findings demonstrate that stromal lumican restrains PDAC cell growth through mediating cell entry into a quiescent state.
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Affiliation(s)
- X Li
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Y Kang
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - D Roife
- Department of General Surgery, The University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Y Lee
- Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - M Pratt
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - M R Perez
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - B Dai
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - E J Koay
- Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - J B Fleming
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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O'Neill SC, Perez MR, Hammond KE, Sheader EA, Negretti N. Direct and indirect modulation of rat cardiac sarcoplasmic reticulum function by n-3 polyunsaturated fatty acids. J Physiol 2002; 538:179-84. [PMID: 11773326 PMCID: PMC2290005 DOI: 10.1113/jphysiol.2001.013015] [Citation(s) in RCA: 22] [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] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Measurements were made of trans-sarcolemmal Ca(2+) fluxes and intracellular [Ca(2+)](i) in rat ventricular myocytes loaded with Indo-1 to determine how the n-3 polyunsaturated fatty acid eicosapentaenoic acid (EPA) suppresses spontaneous waves of Ca(2+) release. We report that in 10 microM EPA, the Ca(2+) efflux generated by individual waves increased by 11.3 +/- 4.9 % over control levels. However, wave-generated efflux per unit time fell overall by 19 +/- 5.3 %. On removal of EPA, wave frequency increased transiently such that Ca(2+) efflux was greater than normal and the cell lost 28.0 +/- 10.6 micromol l(-1) Ca(2+). This probably represents the loss of extra Ca(2+) accumulated by the sarcoplasmic reticulum (SR), while Ca(2+) release was inhibited. These results are evidence of inhibition of the SR Ca(2+)-release mechanism and reduced availability of Ca(2+) to the SR. From the relationship between average intracellular Ca(2+) and the frequency of spontaneous waves, we have calculated the relative contributions of these different mechanisms to the lower frequency of waves. In EPA, the frequency of spontaneous waves fell by 37.5 +/- 8.1 %, the majority of this (29.2 +/- 8.8 %) is due to inhibition of the Ca(2+)-release mechanism. In EPA, the rate of fall of Ca(2+) in the caffeine response (an indicator of surface membrane Ca(2+) efflux pathway activity) was not altered. We conclude, therefore, that the lower resting level of Ca(2+) observed in EPA is due to a lower influx of Ca(2+) across the surface membrane rather than increased activation of efflux pathways. How these effects might contribute to the anti-arrhythmic actions of EPA is discussed.
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Affiliation(s)
- S C O'Neill
- Department of Medicine, University of Manchester, Manchester M13 9PT, UK. stephen.c.o'
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Negretti N, Perez MR, Walker D, O'Neill SC. Inhibition of sarcoplasmic reticulum function by polyunsaturated fatty acids in intact, isolated myocytes from rat ventricular muscle. J Physiol 2000; 523 Pt 2:367-75. [PMID: 10699081 PMCID: PMC2269798 DOI: 10.1111/j.1469-7793.2000.t01-1-00367.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.9] [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] Open
Abstract
1. We have studied the effects of two polyunsaturated fatty acids (PUFAs), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) on spontaneous and electrically stimulated contractions in single, isolated ventricular myocytes from rat hearts. 2. The frequency of spontaneous waves of calcium release and contraction (induced by elevation of the bathing calcium concentration) is reduced in the presence of EPA. At the same time the resting level of intracellular calcium falls, the resting cell length increases and the amplitude of shortening decreases. All these effects are reversed on removal of EPA. 3. Imaging of the waves of calcium release shows that the amplitude and the rate of propagation of the wave is increased in EPA. Consistent with the increased amplitude, integration of the caffeine-induced Na+-Ca2+ exchange current (a measure of the sarcoplasmic reticulum (SR) calcium content) is increased by both EPA and DHA. 4. EPA has a maintained negative inotropic effect on voltage clamped myocytes. This seems to be entirely due to inhibition of the L-type calcium current. Smaller depolarising pulses in control conditions that elicit the same calcium current as in EPA also activate the same level of contraction. This is in spite of the increased SR calcium content in EPA. 5. It is concluded that PUFAs have two effects on the SR; they reduce the availability of calcium for uptake and they inhibit the release mechanism. Both of these effects should lower the frequency of spontaneous waves of calcium release. As spontaneous release of calcium can initiate arrhythmias, some of the anti-arrhythmic action of PUFAs must be exerted at the level of the SR.
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Affiliation(s)
- N Negretti
- Department of Medicine, University of Manchester, Manchester M13 9PT, UK
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8
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Del Pozo MA, Arias JR, Pinilla J, Labarga P, Alcoba M, Martinez de la Cruz FJ, Anton F, Carro JA, Perez MR, Echevarria S, Garrote E, Moreno-Otero R. Interferon alpha treatment of chronic hepatitis C in HIV-infected patients receiving zidovudine: efficacy, tolerance and response related factors. Hepatogastroenterology 1998; 45:1695-701. [PMID: 9840131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
BACKGROUND/AIMS In our area most of the human immunodeficiency virus (HIV) infected patients are intravenous drug users; HIV and hepatitis C virus infections often coexist in these patients. Due to the repercussions of both infections, we designed a trial to evaluate the efficacy, response-related factors and tolerance during an eight-month regime of recombinant interferon alpha-2b on hepatitis C virus infection. METHODOLOGY We included 79 patients in an open, prospective and multicentric trial with zidovudine and interferon alpha-2b. Response to interferon treatment was evaluated by biochemical and histopathological criteria. RESULTS A complete response (alanine aminotransferase normalization) was obtained in 57.4% of patients. The significant response-related factors were: degree of histopathological activity, CD4+ cell number and initial leukocyte number. CONCLUSIONS Recombinant interferon therapy seems to be effective for chronic hepatitis C in HIV infected patients; the best response was in those with active chronic hepatitis and CD4+ cell counts > or = 200/mm3. General tolerance was variable, although side effects were not different from those seen in non-HIV patients. The most common side effect was flu-like syndrome (constitutional manifestations), with no interference on treatment continuity; however, hematological toxicity prevents the indiscriminate use of interferon.
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Affiliation(s)
- M A Del Pozo
- Unit of Infectious Diseases, Hospital Clinico Universitario, Valladolid, Spain
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Cintron E, Quintero EC, Perez MR, Ramirez-de Arellano GA, Manich BV. Computed tomography, sonographic, and radiographic findings in adrenal myelolipoma. Urology 1984; 23:608-10. [PMID: 6730136 DOI: 10.1016/0090-4295(84)90085-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
We report on a patient with a large adrenal myelolipoma which was suspected pre-operatively on the basis of sonographic, computed tomography (CT), and radiographic findings.
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Grossman RI, Ring EJ, Oleaga JA, Freiman DB, Perez MR. Diagnosis of pyogenic hepatic abscesses by percutaneous transhepatic cholangiography. AJR Am J Roentgenol 1979; 132:919-20. [PMID: 108969 DOI: 10.2214/ajr.132.6.919] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Four of 83 patients undergoing percutaneous transhepatic cholangiography were demonstrated to have hepatic abscesses communicating with the biliary tract. The abscesses resulted from obstruction of the common bile duct. The etiologies of the obstructions were chronic pancreatitis, recurrent cholangiocarcinoma. Radiographic demonstration of suppurative cholangitis is associated with a very poor prognosis.
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Ring EJ, Freiman DB, Oleaga JA, Mackie JA, Perez MR, Schiff DP. Clinical applications of nonoperative T-tube replacement. Surg Gynecol Obstet 1979; 148:213-20. [PMID: 419424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
T tubes were successfully reintroduced through previously created drainage tracts in 17 consecutive attempts. The new tubes can re-establish bile flow in a variety of circumstances in avoiding reoperation.
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Perez MR, Oleaga JA, Freiman DB, McLean GL, Ring EJ. Removal of a distal common bile duct stone through percutaneous transhepatic catheterization. Arch Surg 1979; 114:107-9. [PMID: 758870 DOI: 10.1001/archsurg.1979.01370250109024] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A residual distal common bile duct stone was successfully advanced into the duodenum after percutaneous transhepatic catheterization of the biliary tract. Nonsurgical retrieval of retained biliary duct stones through surgically created T-tube tracts has been shown to be a practical procedure with high reported success rates. Reoperation has been necessary in cases where no drainage tube was introduced at surgery or when stones have formed after the fistula closed. Transhepatic catheterization techniques may provide a way to manipulate residual biliary tract stones when no other access is available.
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Plesner L, Leroy ES, Wang P, Perez MR, Esmann V. Purification of glycogen synthetase-D from human polymorphomuclear leukocytes. Biochim Biophys Acta 1972; 268:344-53. [PMID: 4623706 DOI: 10.1016/0005-2744(72)90329-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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