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Müller K, Toll LJ, Manzardo OA, Baumgartner J, Nickel E, Wenzel F, Klotz D. Holder Pasteurization: Comparison of Water-Bath and Dry-Tempering Devices. Front Pediatr 2022; 10:879853. [PMID: 35874591 PMCID: PMC9301034 DOI: 10.3389/fped.2022.879853] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 06/17/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Human milk (HM) for premature infants is frequently Holder pasteurized (heated at 62.5 ± 0.5°C for 30 min) despite its detrimental effects on heat-sensitive milk components. This tolerated compromise ensures HM's microbial safety while less detrimental methods like short-time HM treatments (HTST) are still being evaluated. Dry-tempering devices (DT-HoP) were recently introduced in clinical practice due to hygienic concerns about water-based Holder pasteurizers (WB-HoP). Evidence on the impact of such dry-tempering devices on HM quality is lacking. The aim of this study was to compare protein retention rates after DT-HoP, WB-HoP and HTST. METHODS We colorimetrically determined alkaline phosphatase activity (ALP), concentrations of secretory immunoglobulin A (sIgA), and lactoferrin (LF) before and after DT-HoP, WB-HoP and HTST. RESULTS ALP was below the detection limit after HoP, but retained 52.8 ± 13% activity after HTST (p < 0.01). Secretory IgA (WB-HoP = 73.2 ± 13.5% vs. DT-HoP = 57 ± 14%, p = 0.0018) and LF retention (WB-HoP=47 ± 40% vs. DT-HoP=25 ± 8%, p = 0.07) differed between the two HoP modes. Again, retention was better maintained after HTST compared to HoP (80.4 ± 23% sIgA and 70 ± 42% LF concentration, all p < 0.01). CONCLUSION Dry-tempering milk lowers even further the quality of HM when performing HoP compared to water-bath pasteurization, while HTST warrants continued evaluation for clinical application.
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Affiliation(s)
- Katharina Müller
- Department of Neonatology, Center for Pediatrics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Luisa J Toll
- Faculty of Medical and Life Sciences Furtwangen University, Furtwangen, Germany
| | - Olimpia A Manzardo
- Department of Neonatology, Center for Pediatrics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Jana Baumgartner
- Department of Neonatology, Center for Pediatrics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Erika Nickel
- Faculty of Medical and Life Sciences Furtwangen University, Furtwangen, Germany
| | - Folker Wenzel
- Faculty of Medical and Life Sciences Furtwangen University, Furtwangen, Germany
| | - Daniel Klotz
- Department of Neonatology, Center for Pediatrics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
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da Silva G, Costa Ramos LF, Dos Santos Seckler H, Mendonça Gomes F, Reis Cortines J, Ramos I, Dinis Anobom C, de Alcantara Machado E, Perpétua de Oliveira DM. Biochemical characterization of digestive membrane-associated alkaline phosphatase from the velvet bean caterpillar Anticarsia gemmatalis. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2019; 102:e21591. [PMID: 31257641 DOI: 10.1002/arch.21591] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In Brazil, the use of transgenic plants expressing the insect-toxic Bacillus thuringiensis endotoxin has been successfully used as pest control management since 2013 in transgenic soybean lineages against pest caterpillars such as Helicoverpa armigera. These toxins, endogenously expressed by the plants or sprayed over the crops, are ingested by the insect and bind to receptors in the midgut of these animals, resulting in disruption of digestion and lower insect survival rates. Here, we identified and characterized a membrane-associated alkaline phosphatase (ALP) in the midgut of Anticarsia gemmatalis, the main soybean defoliator pest in Brazil, and data suggested that it binds to Cry1Ac toxin in vitro. Our data showed a peak of ALP activity in homogenate samples of the midgut dissected from the 4th and 5th instars larvae. The brush border membrane vesicles obtained from the midgut of these larvae were used to purify a 60 kDa ALP, as detected by in-gel activity and in vitro biochemical characterization using pharmacological inhibitors and mass spectrometry. When Cry1Ac toxin was supplied to the diet, it was efficient in decreasing larval weight gain and survival. Indeed, in vitro incubation of Cry1Ac toxin with the purified ALP resulted in a 43% decrease in ALP specific activity and enzyme-linked immunosorbent assay showed that ALP interacts with Cry1Ac toxin in vitro, thus suggesting that ALP could function as a Cry toxin ligand. This is a first report characterizing an ALP in A. gemmatalis.
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Affiliation(s)
- Gabriela da Silva
- Laboratório de Bioquímica Estrutural de Proteínas, Departamento de Bioquímica, Centro de Ciências Matemáticas e da Natureza, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro CEP, Brazil
| | - Luís Felipe Costa Ramos
- Laboratório de Bioquímica Estrutural de Proteínas, Departamento de Bioquímica, Centro de Ciências Matemáticas e da Natureza, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro CEP, Brazil
| | - Henrique Dos Santos Seckler
- Laboratório de Bioquímica Estrutural de Proteínas, Departamento de Bioquímica, Centro de Ciências Matemáticas e da Natureza, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro CEP, Brazil
| | - Fabio Mendonça Gomes
- Laboratório de Bioquímica de Insetos e Parasitos, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro CEP, Brazil
| | - Juliana Reis Cortines
- Departamento de Virologia, Centro de Ciências da Saúde, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro CEP, Brazil
| | - Isabela Ramos
- Laboratório de Bioquímica de Insetos, Centro de Ciências da Saúde, Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro CEP, Brazil
| | - Cristiane Dinis Anobom
- Laboratório de Bioquímica Estrutural de Proteínas, Departamento de Bioquímica, Centro de Ciências Matemáticas e da Natureza, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro CEP, Brazil
| | - Ednildo de Alcantara Machado
- Laboratório de Bioquímica de Insetos e Parasitos, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro CEP, Brazil
| | - Danielle Maria Perpétua de Oliveira
- Laboratório de Bioquímica Estrutural de Proteínas, Departamento de Bioquímica, Centro de Ciências Matemáticas e da Natureza, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro CEP, Brazil
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Dumitrașcu L, Stănciuc N, Aprodu I, Ciuciu AM, Alexe P, Bahrim GE. Monitoring the heat-induced structural changes of alkaline phosphatase by molecular modeling, fluorescence spectroscopy and inactivation kinetics investigations. Journal of Food Science and Technology 2015; 52:6290-300. [PMID: 26396374 DOI: 10.1007/s13197-015-1719-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 12/29/2014] [Accepted: 01/02/2015] [Indexed: 11/25/2022]
Abstract
The heat induced conformational changes of calf alkaline phosphatase (ALP) were analyzed using different methods, based on fluorescence spectroscopy, molecular modeling and inactivation studies. Experimental studies were conducted in buffer solution in the temperature range between 25 and 70 °C. Molecular dynamic (MD) simulation provided details on thermally induced changes in ALP structure, highlighting that heating favored the hydrophobic exposure and important alteration of the catalytic site above 60 °C. Additional information to MD data were obtained by using different fluorescence spectroscopy methods, which revealed a complex mechanism of thermal denaturation. Therefore, the emissive properties indicated an unfolding of ALP at temperatures below 60 °C, whereas at higher temperatures, the polypeptides chains fold leading to a higher exposure of Trp residues. In order to establish a structure-function relationship, the results were correlated with inactivation studies of ALP in buffer at pH 9.0. The inactivation data were fitted using a first-order kinetic model, resulting in an activation energy value of 207.26 ± 21.68 kJ · mol(-1).
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Affiliation(s)
- Loredana Dumitrașcu
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Domneasca Street 111, Building E, Room 304, 800201 Galati, Romania
| | - Nicoleta Stănciuc
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Domneasca Street 111, Building E, Room 304, 800201 Galati, Romania
| | - Iuliana Aprodu
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Domneasca Street 111, Building E, Room 304, 800201 Galati, Romania
| | - Ana-Maria Ciuciu
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Domneasca Street 111, Building E, Room 304, 800201 Galati, Romania
| | - Petru Alexe
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Domneasca Street 111, Building E, Room 304, 800201 Galati, Romania
| | - Gabriela Elena Bahrim
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Domneasca Street 111, Building E, Room 304, 800201 Galati, Romania
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Dumitraşcu L, Stănciuc N, Stanciu S, Râpeanu G. Inactivation kinetics of alkaline phosphatase from different species of milk using quinolyl phosphate as a substrate. Food Sci Biotechnol 2014. [DOI: 10.1007/s10068-014-0242-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Conesa C, FitzGerald RJ. Total solids content and degree of hydrolysis influence proteolytic inactivation kinetics following whey protein hydrolysate manufacture. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:10135-10144. [PMID: 24047254 DOI: 10.1021/jf401837a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The kinetics and thermodynamics of the thermal inactivation of Corolase PP in two different whey protein concentrate (WPC) hydrolysates with degree of hydrolysis (DH) values of ~10 and 21%, and at different total solids (TS) levels (from 5 to 30% w/v), were studied. Inactivation studies were performed in the temperature range from 60 to 75 °C, and residual enzyme activity was quantified using the azocasein assay. The inactivation kinetics followed a first-order model. Analysis of the activation energy, thermodynamic parameters, and D and z values, demonstrated that the inactivation of Corolase PP was dependent on solution TS. The intestinal enzyme preparation was more heat sensitive at low TS. Moreover, it was also found that the enzyme was more heat sensitive in solutions at higher DH.
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Affiliation(s)
- Celia Conesa
- Department of Life Sciences, University of Limerick , Limerick, Ireland
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Thermal stability of bioactive enzymatic papers. Colloids Surf B Biointerfaces 2010; 75:239-46. [DOI: 10.1016/j.colsurfb.2009.08.042] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Revised: 08/25/2009] [Accepted: 08/26/2009] [Indexed: 11/18/2022]
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Marchand S, Merchiers M, Messens W, Coudijzer K, De Block J. Thermal inactivation kinetics of alkaline phosphatase in equine milk. Int Dairy J 2009. [DOI: 10.1016/j.idairyj.2009.05.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Atyaksheva LF, Tarasevich BN, Chukhrai ES, Poltorak OM. Thermal inactivation of alkali phosphatases under various conditions. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2009. [DOI: 10.1134/s0036024409020307] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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RIENER JOERG, NOCI FRANCESCO, CRONIN DENISA, MORGAN DESMONDJ, LYNG JAMESG. Effect of high intensity pulsed electric fields on enzymes and vitamins in bovine raw milk. INT J DAIRY TECHNOL 2009. [DOI: 10.1111/j.1471-0307.2008.00435.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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