1
|
Chen A, Jandarov R, Zhou L, Calafat AM, Zhang G, Urbina EM, Sarac J, Augustin DH, Caric T, Bockor L, Petranovic MZ, Novokmet N, Missoni S, Rudan P, Deka R. Association of perfluoroalkyl substances exposure with cardiometabolic traits in an island population of the eastern Adriatic coast of Croatia. Sci Total Environ 2019; 683:29-36. [PMID: 31129329 PMCID: PMC6581612 DOI: 10.1016/j.scitotenv.2019.05.250] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 05/15/2019] [Accepted: 05/17/2019] [Indexed: 05/31/2023]
Abstract
BACKGROUND Exposure to perfluoroalkyl substances (PFAS), ubiquitous environmental contaminants, may be related to cardiometabolic diseases in adults. Studies in European populations to examine the association of PFAS exposure and comprehensive cardiometabolic traits and metabolic syndrome (MetS) are limited. METHODS In this pilot cross-sectional study of a well-characterized adult population of the island of Hvar, situated off the eastern Adriatic coast of Croatia, we measured PFAS concentrations in plasma samples collected during 2007-2008 and examined their cross-sectional associations with cardiometabolic traits and MetS after adjustment of covariates (n = 122). PFAS investigated in this study included perfluorooctane sulfonic acid (PFOS), perfluorooctanoic acid (PFOA), perfluorohexane sulfonic acid (PFHxS), and perfluorononanoic acid (PFNA). RESULTS The geometric mean (range) was 8.91 (2.36, 33.67) ng/mL for PFOS, 2.87 (1.03, 8.02) ng/mL for PFOA, 0.77 (0.25, 2.40) ng/mL for PFHxS, and 1.29 (0.48, 3.46) ng/mL for PFNA, with frequency of detection at 100%, 100%, 95.9%, and 100%, respectively. PFOS, PFOA, and PFNA concentrations were positively associated with the risk of MetS as defined by the Adult Treatment Panel III (ATP III) criteria, with estimated odds ratios and 95% confidence intervals at 1.89 (0.93, 3.86), 2.19 (0.88, 5.44), and 2.95 (1.12, 7.80), respectively, with only PFNA reaching statistical significance. PFNA concentrations were associated with increased risk of overweight or obesity. CONCLUSIONS Background exposure to PFOS, PFOA, and PFNA was marginally associated with increased risk of MetS in this small study, and these results should be confirmed with a larger sample size and longitudinal follow-up.
Collapse
Affiliation(s)
- Aimin Chen
- Division of Epidemiology, Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
| | - Roman Jandarov
- Division of Biostatistics and Bioinformatics, Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Li Zhou
- Division of Epidemiology, Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, USA; Department of Epidemiology, School of Public Health and Management, Chongqing Medical University, Chongqing, China
| | - Antonia M Calafat
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Ge Zhang
- Division of Human Genetics, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Elaine M Urbina
- Heart Institute, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Jelena Sarac
- Institute for Anthropological Research, Zagreb, Croatia
| | | | - Tonko Caric
- Institute for Anthropological Research, Zagreb, Croatia
| | - Luka Bockor
- Institute for Anthropological Research, Zagreb, Croatia
| | | | | | - Sasa Missoni
- Institute for Anthropological Research, Zagreb, Croatia; Josip Juraj Strossmayer University of Osijek, Faculty of Medicine, Osijek, Croatia
| | - Pavao Rudan
- Institute for Anthropological Research, Zagreb, Croatia; Croatian Academy of Sciences and Arts, Zagreb, Croatia
| | - Ranjan Deka
- Division of Epidemiology, Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
| |
Collapse
|
2
|
Somensi ML, Monteiro ANTR, Marx FR, Bockor L, Vieira MS, Kessler AM. Can the Fine Wheat Bran be a Betaine Source in Poultry Diets? Braz J Poult Sci 2019. [DOI: 10.1590/1806-9061-2018-0817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- ML Somensi
- Ministry of Education of Brazil, Brazil; Universidade Federal do Rio Grande do Sul, Brazil
| | | | - FR Marx
- Universidade Federal do Rio Grande do Sul, Brazil
| | - L Bockor
- Universidade Federal do Rio Grande do Sul, Brazil
| | - MS Vieira
- Universidade Federal do Rio Grande do Sul, Brazil
| | - AM Kessler
- Universidade Federal do Rio Grande do Sul, Brazil
| |
Collapse
|
3
|
Bockor L, Bortolussi G, Vodret S, Iaconcig A, Jašprová J, Zelenka J, Vitek L, Tiribelli C, Muro AF. Modulation of bilirubin neurotoxicity by the Abcb1 transporter in the Ugt1-/- lethal mouse model of neonatal hyperbilirubinemia. Hum Mol Genet 2017; 26:145-157. [PMID: 28025333 DOI: 10.1093/hmg/ddw375] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 10/27/2016] [Indexed: 01/20/2023] Open
Abstract
Moderate neonatal jaundice is the most common clinical condition during newborn life. However, a combination of factors may result in acute hyperbilirubinemia, placing infants at risk of developing bilirubin encephalopathy and death by kernicterus. While most risk factors are known, the mechanisms acting to reduce susceptibility to bilirubin neurotoxicity remain unclear. The presence of modifier genes modulating the risk of developing bilirubin-induced brain damage is increasingly being recognised. The Abcb1 and Abcc1 members of the ABC family of transporters have been suggested to have an active role in exporting unconjugated bilirubin from the central nervous system into plasma. However, their role in reducing the risk of developing neurological damage and death during neonatal development is still unknown.To this end, we mated Abcb1a/b-/- and Abcc1-/- strains with Ugt1-/- mice, which develop severe neonatal hyperbilirubinemia. While about 60% of Ugt1-/- mice survived after temporary phototherapy, all Abcb1a/b-/-/Ugt1-/- mice died before postnatal day 21, showing higher cerebellar levels of unconjugated bilirubin. Interestingly, Abcc1 role appeared to be less important.In the cerebellum of Ugt1-/- mice, hyperbilirubinemia induced the expression of Car and Pxr nuclear receptors, known regulators of genes involved in the genotoxic response.We demonstrated a critical role of Abcb1 in protecting the cerebellum from bilirubin toxicity during neonatal development, the most clinically relevant phase for human babies, providing further understanding of the mechanisms regulating bilirubin neurotoxicity in vivo. Pharmacological treatments aimed to increase Abcb1 and Abcc1 expression, could represent a therapeutic option to reduce the risk of bilirubin neurotoxicity.
Collapse
Affiliation(s)
- Luka Bockor
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
| | - Giulia Bortolussi
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
| | - Simone Vodret
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
| | - Alessandra Iaconcig
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
| | - Jana Jašprová
- Institute of Medical Biochemistry and Laboratory Medicine, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Jaroslav Zelenka
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technicka 3, 166 28 Prague, Czech Republic
| | - Libor Vitek
- Institute of Medical Biochemistry and Laboratory Medicine, First Faculty of Medicine, Charles University, Prague, Czech Republic.,Fourth Department of Internal Medicine, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Claudio Tiribelli
- Centro Studi Fegato, Fondazione Italiana Fegato, AREA Science Park, Campus Basovizza Trieste, Italy and
| | - Andrés F Muro
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
| |
Collapse
|
4
|
Vieira M, Ribeiro A, Kessler A, Chiba L, Bockor L. Performance and body composition of light and heavy early-weaning piglets subject to different dietary energy levels. Livest Sci 2015. [DOI: 10.1016/j.livsci.2015.06.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
5
|
Henn JD, Bockor L, Borille R, Coldebella A, Ribeiro AML, Kessler AM. Determination of the equation parameters of carbon flow curves and estimated carbon flow and CO2 emissions from broiler production. Poult Sci 2015; 94:2303-12. [PMID: 26188026 DOI: 10.3382/ps/pev178] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 09/05/2014] [Accepted: 06/05/2015] [Indexed: 11/20/2022] Open
Abstract
The objective of this study was to determine the equation parameters of carbon (i.e., C) flow curves and to estimate C flow and carbon dioxide (i.e., CO2) emissions from the production of 1- to 49-day-old broilers from different genetic strains. In total, 384 1-day-old chicks were used, distributed into 4 groups: high-performance males (Cobb-M) and females (Cobb-F), and intermediate-performance males (C44-M) and females (C44-F), with 6 replicates/treatment according to a completely randomized study design. Carbon intake and retention were calculated based on diet and body C composition, and expired C was stoichiometrically estimated as digestible C intake-C retention-C in the urine. Litter C emission was estimated as initial litter C+C in the excreta-final litter C. Carbon flow curves were determined fitting data by nonlinear regression using the Gompertz function. Expired CO2 was calculated based on expired C. The applied nonlinear model presented goodness-of-fit for all responses (R2>0.99). Carbon dioxide production was highly correlated with growth rate. At 42 d age, CO2 expiration (g/bird) was 3,384.4 for Cobb-M, 2,947.9 for Cobb-F, 2,512.5 for C44-M, and 2185.1 for C44-F. Age also significantly affected CO2 production: to achieve 2.0 kg BW, CO2 expiration (g/bird) was 1,794.3 for Cobb-M, 2,016.5 for Cobb-F, 2617.7 for C44-M, and 3,092.3 for C44-F. The obtained equations present high predictability to estimate individual CO2 emissions in strains of Cobb and C44 broilers of any weight, or age, reared between 1 and 49 d age.
Collapse
Affiliation(s)
- J D Henn
- Animal Science Department of Federal University of Rio Grande do Sul, Avenida Bento Gonçalves, 7712. ZIP: 91540-000 Porto Alegre, RS, Brazil Embrapa Swine and Poultry, BR 153, km 110, 89700-000, Concórdia, SC, Brazil
| | - L Bockor
- Animal Science Department of Federal University of Rio Grande do Sul, Avenida Bento Gonçalves, 7712. ZIP: 91540-000 Porto Alegre, RS, Brazil
| | - R Borille
- Animal Science Department of Federal University of Rio Grande do Sul, Avenida Bento Gonçalves, 7712. ZIP: 91540-000 Porto Alegre, RS, Brazil
| | - A Coldebella
- Embrapa Swine and Poultry, BR 153, km 110, 89700-000, Concórdia, SC, Brazil
| | - A M L Ribeiro
- Animal Science Department of Federal University of Rio Grande do Sul, Avenida Bento Gonçalves, 7712. ZIP: 91540-000 Porto Alegre, RS, Brazil
| | - A M Kessler
- Animal Science Department of Federal University of Rio Grande do Sul, Avenida Bento Gonçalves, 7712. ZIP: 91540-000 Porto Alegre, RS, Brazil
| |
Collapse
|
6
|
Butzen F, Vieira M, Kessler A, Aristimunha P, Marx F, Bockor L, Ribeiro A. Early feed restriction in broilers. II: Body composition and nutrient gain. J APPL POULTRY RES 2015. [DOI: 10.3382/japr/pfv026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
|
7
|
Porro F, Bortolussi G, Barzel A, Zentilin L, Vodret S, Bockor L, Kay MA, Muro AF. 688. AAV8-Mediated Liver Gene Targeting Without Nucleases Rescues Lethality in a Mouse Model of the Crigler-Najjar Syndrome. Mol Ther 2015. [DOI: 10.1016/s1525-0016(16)34297-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
8
|
Henn JD, Bockor L, Ribeiro AML, Coldebella A, Kessler ADM. Growth and deposition of body components of intermediate and high performance broilers. Rev Bras Cienc Avic 2014. [DOI: 10.1590/1516-635x1603319-328] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Affiliation(s)
- JD Henn
- UFRGS; Embrapa Suínos e Aves
| | | | | | | | | |
Collapse
|
9
|
Bortolussi G, Zentillin L, Vaníkova J, Bockor L, Bellarosa C, Mancarella A, Vianello E, Tiribelli C, Giacca M, Vitek L, Muro AF. Life-long correction of hyperbilirubinemia with a neonatal liver-specific AAV-mediated gene transfer in a lethal mouse model of Crigler-Najjar Syndrome. Hum Gene Ther 2014; 25:844-55. [PMID: 25072305 PMCID: PMC4175423 DOI: 10.1089/hum.2013.233] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Accepted: 07/21/2014] [Indexed: 12/21/2022] Open
Abstract
Null mutations in the UGT1A1 gene result in Crigler-Najjar syndrome type I (CNSI), characterized by severe hyperbilirubinemia and constant risk of developing neurological damage. Phototherapy treatment lowers plasma bilirubin levels, but its efficacy is limited and liver transplantation is required. To find alternative therapies, we applied AAV liver-specific gene therapy to a lethal mouse model of CNSI. We demonstrated that a single neonatal hUGT1A1 gene transfer was successful and the therapeutic effect lasted up to 17 months postinjection. The therapeutic effect was mediated by the presence of transcriptionally active double-stranded episomes. We also compared the efficacy of two different gene therapy approaches: liver versus skeletal muscle transgene expression. We observed that 5-8% of normal liver expression and activity levels were sufficient to significantly reduce bilirubin levels and maintain lifelong low plasma bilirubin concentration (3.1±1.5 mg/dl). In contrast, skeletal muscle was not able to efficiently lower bilirubin (6.4±2.0 mg/dl), despite 20-30% of hUgt1a1 expression levels, compared with normal liver. We propose that this remarkable difference in gene therapy efficacy could be related to the absence of the Mrp2 and Mrp3 transporters of conjugated bilirubin in muscle. Taken together, our data support the concept that liver is the best organ for efficient and long-term CNSI gene therapy, and suggest that the use of extra-hepatic tissues should be coupled to the presence of bilirubin transporters.
Collapse
Affiliation(s)
- Giulia Bortolussi
- International Centre for Genetic Engineering and Biotechnology, 34149 Trieste, Italy
| | - Lorena Zentillin
- International Centre for Genetic Engineering and Biotechnology, 34149 Trieste, Italy
| | - Jana Vaníkova
- Institute of Medical Biochemistry and Laboratory Medicine, First Faculty of Medicine, Charles University, 120 00 Prague, Czech Republic
| | - Luka Bockor
- International Centre for Genetic Engineering and Biotechnology, 34149 Trieste, Italy
| | - Cristina Bellarosa
- Centro Studi Fegato, Fondazione Italiana Fegato, AREA Science Park, Campus Basovizza, 34149 Trieste, Italy
| | - Antonio Mancarella
- Centro Studi Fegato, Fondazione Italiana Fegato, AREA Science Park, Campus Basovizza, 34149 Trieste, Italy
| | - Eleonora Vianello
- Centro Studi Fegato, Fondazione Italiana Fegato, AREA Science Park, Campus Basovizza, 34149 Trieste, Italy
| | - Claudio Tiribelli
- Centro Studi Fegato, Fondazione Italiana Fegato, AREA Science Park, Campus Basovizza, 34149 Trieste, Italy
- Department of Medical Science, University of Trieste, 34128 Trieste, Italy
| | - Mauro Giacca
- International Centre for Genetic Engineering and Biotechnology, 34149 Trieste, Italy
| | - Libor Vitek
- Institute of Medical Biochemistry and Laboratory Medicine, First Faculty of Medicine, Charles University, 120 00 Prague, Czech Republic
- Fourth Department of Internal Medicine, First Faculty of Medicine, Charles University, 120 00 Prague, Czech Republic
| | - Andrés F. Muro
- International Centre for Genetic Engineering and Biotechnology, 34149 Trieste, Italy
| |
Collapse
|
10
|
Porro F, Bockor L, De Caneva A, Bortolussi G, Muro AF. Generation of Ugt1-deficient murine liver cell lines using TALEN technology. PLoS One 2014; 9:e104816. [PMID: 25118822 PMCID: PMC4132024 DOI: 10.1371/journal.pone.0104816] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 07/17/2014] [Indexed: 12/22/2022] Open
Abstract
The Crigler-Najjar Syndrome Type I (CNSI) is a rare genetic disorder caused by mutations in the Ugt1a1 gene. It is characterized by unconjugated hyperbilirubinemia that may result in severe neurologic damage and death if untreated. To date, liver transplantation is the only curative treatment. With the aim of generating mutant cell lines of the Ugt1 gene, we utilized the TALEN technology to introduce site-specific mutations in Ugt1 exon 4. We report a fast and efficient method to perform gene knockout in tissue culture cells, based on the use of TALEN pairs targeting restriction enzyme (RE) sites in the region of interest. This strategy overcame the presence of allele-specific single nucleotide polymorphisms (SNPs) and pseudogenes, conditions that limit INDELs' detection by Surveyor. We obtained liver-derived murine N-Muli cell clones having INDELs with efficiency close to 40%, depending on the TALEN pair and RE target site. Sequencing of the target locus and WB analysis of the isolated cell clones showed a high proportion of biallelic mutations in cells treated with the most efficient TALEN pair. Ugt glucuronidation activity was reduced basal levels in the biallelic mutant clones. These mutant liver-derived cell lines could be a very useful tool to study biochemical aspects of Ugt1 enzyme activity in a more natural context, such as substrate specificity, requirement of specific co-factors, the study of inhibitors and other pharmacological aspects, and to correlate enzyme activity to the presence of specific mutations in the gene, by adding back to the mutant cell clones specific variants of the Ugt1 gene. In addition, since genome editing has recently emerged as a potential therapeutic approach to cure genetic diseases, the definition of the most efficient TALEN pair could be an important step towards setting up a platform to perform genome editing in CNSI.
Collapse
Affiliation(s)
- Fabiola Porro
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, TS, Italy
| | - Luka Bockor
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, TS, Italy
| | - Alessia De Caneva
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, TS, Italy
| | - Giulia Bortolussi
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, TS, Italy
| | - Andrés F. Muro
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, TS, Italy
| |
Collapse
|
11
|
Henn J, Bockor L, Vieira M, Ribeiro A, Kessler A, Albino L, Rostagno H, Crenshaw J, Campbell J, Rangel L. Inclusion of porcine spray-dried plasma in broiler diets. J APPL POULTRY RES 2013. [DOI: 10.3382/japr.2012-00613] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
12
|
Krás RV, Kessler ADM, Ribeiro AML, Henn JD, Bockor L, Sbrissia AF. Effect of dietary fiber, genetic strain and age on the digestive metabolism of broiler chickens. Rev Bras Cienc Avic 2013. [DOI: 10.1590/s1516-635x2013000200003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- RV Krás
- Universidade Federal do Rio Grande do Sul
| | | | | | - JD Henn
- Universidade Federal do Rio Grande do Sul
| | - L Bockor
- Universidade Federal do Rio Grande do Sul
| | - AF Sbrissia
- Universidade do Estado de Santa Catarina, SC
| |
Collapse
|
13
|
Krás RV, Kessler AM, Ribeiro AML, Henn JD, Santos IID, Halfen DP, Bockor L. Effect of dietary fiber and genetic strain on the performance and energy balance of broiler chickens. Rev Bras Cienc Avic 2013. [DOI: 10.1590/s1516-635x2013000100003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- RV Krás
- Universidade Federal do Rio Grande do Sul
| | - AM Kessler
- Universidade Federal do Rio Grande do Sul
| | | | - JDi Henn
- Universidade Federal do Rio Grande do Sul
| | | | - DP Halfen
- Universidade Federal do Rio Grande do Sul
| | - L Bockor
- Universidade Federal do Rio Grande do Sul
| |
Collapse
|
14
|
Moraes ML, Ribeiro AML, Kessler AM, Ledur VS, Fischer MM, Bockor L, Cibulski SP, Gava D. Effect of CLA on performance and immune response of weanling piglets1. J Anim Sci 2012; 90:2590-8. [DOI: 10.2527/jas.2011-4115] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- M. L. Moraes
- Departamento de Zootecnia, Universidade Federal do Rio Grande do Sul, CEP 91540-000, Porto Alegre, RS, Brazil
| | - A. M. L. Ribeiro
- Departamento de Zootecnia, Universidade Federal do Rio Grande do Sul, CEP 91540-000, Porto Alegre, RS, Brazil
| | - A. M. Kessler
- Departamento de Zootecnia, Universidade Federal do Rio Grande do Sul, CEP 91540-000, Porto Alegre, RS, Brazil
| | - V. S. Ledur
- Departamento de Zootecnia, Universidade Federal do Rio Grande do Sul, CEP 91540-000, Porto Alegre, RS, Brazil
| | - M. M. Fischer
- Departamento de Zootecnia, Universidade Federal do Rio Grande do Sul, CEP 91540-000, Porto Alegre, RS, Brazil
| | - L. Bockor
- Departamento de Zootecnia, Universidade Federal do Rio Grande do Sul, CEP 91540-000, Porto Alegre, RS, Brazil
| | - S. P. Cibulski
- Instituto de Pesquisas Veterinárias Desidério Finamor, Universidade Federal do Rio Grande do Sul, CEP 92990-000, Porto Alegre, RS, Brazil
| | - D. Gava
- Setor de Suínos, Universidade Federal do Rio Grande do Sul, CEP 91540-000, Porto Alegre, RS, Brazil
| |
Collapse
|
15
|
Bockor L, Dahlke F, Maiorka A, Castro OS, Oliveira EG, Krabbe EL, Warpechowski MB. COMPARAÇÃO DE MEDIDAS DA CAPACIDADE TAMPONANTE DE MATÉRIAS–PRIMAS E DIETAS UTILIZADAS PARA LEITÕES. AVS 2007. [DOI: 10.5380/avs.v12i3.10930] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Avaliou-se a capacidade tamponante(CT) de diferentes ingredientes e dietas para leitões,por meio de diferentes medidas: pH inicial (pHi),acidez ou alcalinidade tituláveis (AT) e CT. Foramutilizadas 32 amostras de diferentes ingredientes,pré-misturas e dietas, classificadas como aminoácidos,suplementos minerais, cereais e subprodutos,soja e subprodutos, ingredientes de origem animale dietas completas. O pHi foi mensurado em trêssoluções com 10 g de amostra diluídas em 90 ml deágua destilada e deionizada, nas quais foi adicionadoácido clorídrico, ou ácido fórmico ou um acidificantecomercial à base de ácido fórmico, para reduzir opH até 5,0, ou NaOH, quando o pHi foi menor que5,0. A AT foi definida como a quantidade de ácidoou base necessária para alterar o pH entre o pHie 5,0, expresso em mEq/100 g de matéria seca deamostra. A CT foi calculada dividindo-se os valoresde AT pelo intervalo de pH considerado, sendo osvalores obtidos com cada ácido considerados replicatasde cada amostra. Os resultados com cadamedida foram submetidos à ANOVA considerandoas classificações. A correlação entre o pHi e a CTfoi também avaliada. Os suplementos minerais e osaminoácidos apresentaram valores extremos emtodas as medidas, e foram separados em subgrupos.As classes soja, cereais e dietas mostraram valoressimilares de pHi, mas diferiram quanto às outras medidas(P<0,05). A CT demonstrou mais sensibilidadeque a AT. O pHi apresentou correlação inconsistentecom a CT, não sendo uma estimativa confiável destapropriedade físico-química.
Collapse
|