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Zou Z, Bouchereau-De Pury C, Hewavitharana AK, Al-Shehri SS, Duley JA, Cowley DM, Koorts P, Shaw PN, Bansal N. A sensitive and high-throughput fluorescent method for determination of oxidase activities in human, bovine, goat and camel milk. Food Chem 2020; 336:127689. [PMID: 32763736 DOI: 10.1016/j.foodchem.2020.127689] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 07/20/2020] [Accepted: 07/26/2020] [Indexed: 01/16/2023]
Abstract
Milk oxidases are an integral part of milk immune system, and good indicators for milk thermal history. Current assay methods for milk oxidases are either insensitive, tedious or not cost-effective. In this study, a high-throughput fluorescence assay method for determination of xanthine oxidase (XO) and polyamine oxidase (PAO) activities in milk samples was developed. The hydrogen peroxide generated by XO catalysed oxidation of hypoxanthine, and PAO catalysed oxidation of spermine, was coupled to horseradish peroxidase conversion of Amplex® Red (1-(3,7-dihydroxyphenoxazin-10-yl)ethanone) to the fluorescent product resorufin. The assay was highly sensitive, with limits of detection of activity in milk being 3 × 10-7 and 7 × 10-7 U/mL for XO and PAO, respectively. Intra-run and inter-run results showed good assay repeatability and reproducibility. The assay was successfully applied to survey the XO and PAO activities in human, bovine, goat and camel milk samples, and it can be readily adapted for measurements of other oxidase activities.
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Affiliation(s)
- Zhengzheng Zou
- School of Agriculture and Food Sciences, The University of Queensland, St Lucia, QLD, Australia
| | - Claire Bouchereau-De Pury
- School of Agriculture and Food Sciences, The University of Queensland, St Lucia, QLD, Australia; Laïta, Brest Cedex, France
| | | | - Saad S Al-Shehri
- College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
| | - John A Duley
- School of Pharmacy, The University of Queensland, Woolloongabba, QLD, Australia
| | - David M Cowley
- Mater Research Institute, The University of Queensland, Woolloongabba, QLD, Australia
| | - Pieter Koorts
- Department of Neonatology, Royal Brisbane and Women's Hospital, Herston, QLD, Australia
| | - Paul N Shaw
- School of Pharmacy, The University of Queensland, Woolloongabba, QLD, Australia
| | - Nidhi Bansal
- School of Agriculture and Food Sciences, The University of Queensland, St Lucia, QLD, Australia; School of Pharmacy, The University of Queensland, Woolloongabba, QLD, Australia.
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2
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Moriya S, Iwasaki K, Samejima K, Takao K, Kohda K, Hiramatsu K, Kawakita M. A mass spectrometric method to determine activities of enzymes involved in polyamine catabolism. Anal Chim Acta 2012; 748:45-52. [PMID: 23021806 DOI: 10.1016/j.aca.2012.08.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Accepted: 08/20/2012] [Indexed: 11/23/2022]
Abstract
An analytical method for the determination of three polyamines (putrescine, spermidine, and spermine) and five acetylpolyamines [N(1)-acetylspermidine (N(1)AcSpd), N(8)-acetylspermidine (N(8)AcSpd), N(1)-acetylspermine, N(1),N(8)-diacetylspermidine, and N(1),N(12)-diacetylspermine] involved in the polyamine catabolic pathway has been developed using a hybrid tandem mass spectrometer. Heptafluorobutyryl (HFB) derivatives of these compounds and respective internal standards labeled with stable isotopes were analyzed simultaneously by TOF MS, based on peak areas appearing at appropriate m/z values. The isomers, N(1)AcSpd and N(8)AcSpd were determined from their fragment ions, the acetylamidopropyl and acetylamidobutyl groups, respectively, using MS/MS with (13)C(2)-N(1)AcSpd and (13)C(2)-N(8)AcSpd which have the (13)C(2)-acetyl group as an internal standard. The TOF MS method was successfully applied to measure the activity of enzymes involved in polyamine catabolic pathways, namely N(1)-acetylpolyamine oxidase (APAO), spermine oxidase (SMO), and spermidine/spermine N(1)-acetyltransferase (SSAT). The following natural substrates and products labeled with stable isotopes considering the application to biological samples were identified; for APAO, [4,9,12-(15)N(3)]-N(1)-acetylspermine and [1,4,8-(15)N(3)]spermidine ((15)N(3)-Spd), respectively; for SMO, [1,4,8,12-(15)N(4)]spermine and (15)N(3)-Spd, respectively; and for SSAT, (15)N(3)-Spd and [1,4,8-(15)N(3)]-N(1)-acetylspermidine, respectively.
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Affiliation(s)
- Shunsuke Moriya
- Department of Molecular Medicine, Tokyo Metropolitan Institute of Medical Science, 2-1-6 Kami-kitazawa, Tokyo 156-8506, Japan
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3
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Abstract
The most widely used methods for measuring polyamine enzyme activities are radioisotope methods that measure the radioactivity of compounds produced from radiolabeled substrate by the enzyme reaction. Several fluorescent polyamines have been developed for the measurement of the polyamine transport system (PTS) or transglutaminase. Although fluorophores in the fluorescent polyamines may affect the affinity of the polyamine moiety to the enzyme protein, the assays that use fluorescent substrate are sensitive and simple for common laboratory usage.In this chapter, the uses of dansyl polyamines with a simple high-performance liquid chromatography system for the measurement of the PTS and polyamine catabolic enzymes including spermidine/spermine N¹-acetyltransferase and N¹-acetylpolyamine oxidase are described.
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Affiliation(s)
- Koichi Takao
- Laboratory of Cellular Physiology, Department of Clinical Dietetics and Human Nutrition, Faculty of Pharmaceutical Sciences, Josai University, Sakado, Saitama, Japan
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Ohe M, Sasaki H, Niitsu M, Bagni N, Tassoni A, Matsuzaki S. Cadaverine turnover in soybean seedlings using 15N-labelled lysine and cadaverine. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2010; 48:591-5. [PMID: 20153659 DOI: 10.1016/j.plaphy.2010.01.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2009] [Revised: 01/18/2010] [Accepted: 01/20/2010] [Indexed: 05/12/2023]
Abstract
The synthesis and translocation of the diamine cadaverine during soybean (Glycine max L. Meer cv. Sakai) germination were studied using 15N-labelled lysine (the cadaverine precursor) and 15N-labelled cadaverine, both under light/dark (12 h/12 h) and total dark germinating conditions. 15N-cadaverine and non-labelled polyamines were simultaneously detected using ionspray ionization-mass spectrometry. Both 15N-cadaverine and 15N-lysine were taken up by soybean. 15N-lysine was transported to the shoot and root and converted into 15N-cadaverine, whereas relatively little 15N-cadaverine was formed from 15N-lysine in the cotyledon. The acropetal translocation of 15N-cadaverine from the cotyledon to the shoot seemed to predominate over basipetal transport to the root. Although no other 15N-derivatised polyamines were found, supplying exogenous 15N-lysine seemed to indirectly affect the metabolism of 14N putrescine, spermidine and spermine, while no significant effect was detected after supplying 15N-cadaverine.
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Affiliation(s)
- Masato Ohe
- Department of Biochemistry, Dokkyo University School of Medicine, Tochigi, Japan
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5
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Samejima K, Otani M, Murakami Y, Oka T, Kasai M, Tsumoto H, Kohda K. Electrospray ionization and time-of-flight mass spectrometric method for simultaneous determination of spermidine and spermine. Biol Pharm Bull 2007; 30:1943-6. [PMID: 17917267 DOI: 10.1248/bpb.30.1943] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A sensitive method for the determination of polyamines in mammalian cells was described using electrospray ionization and time-of-flight mass spectrometer. This method was 50-fold more sensitive than the previous method using ionspray ionization and quadrupole mass spectrometer. The method employed the partial purification and derivatization of polyamines, but allowed a measurement of multiple samples which contained picomol amounts of polyamines. Time required for data acquisition of one sample was approximately 2 min. The method was successfully applied for the determination of reduced spermidine and spermine contents in cultured cells under the inhibition of aminopropyltransferases. In addition, a new proper internal standard was proposed for the tracer experiment using (15)N-labeled polyamines.
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Affiliation(s)
- Keijiro Samejima
- Research Institute of Pharmaceutical Sciences, Musashino University, Tokyo, Japan.
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7
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Abstract
This review describes my work in the field of polyamine research for the last 35 years. My research started with developing the improved synthesis of decarboxylated S-adenosylmethionine and then moved to the purification of spermidine synthase from rat prostate. I also took considerable efforts to find the synthetic procedure for various polyamines with high yield in order to prepare (15)N-labeled polyamines. On the basis of these methodological work, I searched for the inhibitor of spermidine synthase and found trans-4-methylcyclohexylamine (MCHA), the most effective one at the present time. I also developed a new analytical method for polyamines using stable isotope and ionspray ionization mass spectrometry (IS-MS). Based on these studies I examined the role of polyamines in liver regeneration and found that oral administration of MCHA effectively changed the concentration of polyamines and inhibited the hepatic growth. I also found the close relationship between the concentration ratio of spermidine to spermine and the extent of liver regeneration. These results may shed new light on the control of cell growth by polyamine in vivo.
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Affiliation(s)
- Keijiro Samejima
- Faculty of Pharmaceutical Sciences, Josai University, Sakado City, Japan.
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8
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Ohe M, Kobayashi M, Niitsu M, Bagni N, Matsuzaki S. Analysis of polyamine metabolism in soybean seedlings using 15N-labelled putrescine. PHYTOCHEMISTRY 2005; 66:523-8. [PMID: 15721944 DOI: 10.1016/j.phytochem.2005.01.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2004] [Revised: 11/17/2004] [Indexed: 05/24/2023]
Abstract
The translocation and metabolism of polyamines during soybean germination were studied using 15N-labelled putrescine as a precursor. Both 15N-labelled and unlabelled polyamines were simultaneously detected using a novel application of ionspray ionization-mass spectrometry. 15N-putrescine was rapidly transported to the shoots and roots, where it was converted to spermidine and spermine. The main 15N-polyamine that accumulated in the root was 15N-spermine. It was found that there were differences in the way endogenous putrescine and exogenous 15N-putrescine were metabolized in soybean seedlings.
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Affiliation(s)
- Masato Ohe
- Department of Biochemistry, Dokkyo University School of Medicine, Mibu, Tochigi 321 0293, Japan.
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Kobayashi M, Watanabe T, Xu YJ, Tatemori M, Goda H, Niitsu M, Shirahata A, Samejima K. Control of Spermidine and Spermine Levels in Rat Tissues by trans-4-Methylcyclohexylamine, a Spermidine-Synthase Inhibitor. Biol Pharm Bull 2005; 28:569-73. [PMID: 15802788 DOI: 10.1248/bpb.28.569] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In rat tissues, a decrease in spermidine, accompanied by an increase in spermine was induced by the oral administration (once daily for either 1 week or 1 month) of trans-4-methylcyclohexylamine (4MCHA), a spermidine synthase inhibitor. This is similar to the changes observed in polyamine content when cell growth is arrested. The body-weight gain of the rats tended to decrease with increasing doses of 4MCHA. A decrease in spermidine, combined with a moderate increase in spermine, was observed dose-dependently in all of the tissues tested, with a relatively fast clearance of 4MCHA. Manipulating the polyamine content of tissues, by daily administration of 100 mumol 4MCHA for 1 week, made it possible to estimate the effects of simultaneously added spermidine or spermine on endogenous polyamine contents. The altered polyamine levels, obtained after daily administration for 1 week, were maintained during the extended 1-month period, with growth-dependent alteration. The results show it is possible to produce experimental rats with a higher spermine:spermidine ratio than control rats to investigate the physiological significance of spermidine downregulation and spermine upregulation in vivo.
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Affiliation(s)
- Masaki Kobayashi
- Faculty of Pharmaceutical Sciences, Josai University, Sakado, Japan
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Kobayashi M, Xu YJ, Samejima K, Goda H, Niitsu M, Takahashi M, Hashimoto Y. Fate of orally administered 15N-labeled polyamines in rats bearing solid tumors. Biol Pharm Bull 2003; 26:285-8. [PMID: 12612433 DOI: 10.1248/bpb.26.285] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We studied absorption, distribution, metabolism, and excretion of polyamines (putrescine, spermidine, and spermine) in the gastrointestinal tract using (15)N-labeled polyamines as tracers and ionspray ionization mass spectrometry (IS-MS). The relatively simple protocol using rats bearing solid tumors provided useful information. Three (15)N-labeled polyamines that were simultaneously administered were absorbed equally from gastrointestinal tract, and distributed within tissues at various concentrations. The uptake of (15)N-spermidine seemed preferential to that of (15)N-spermine since the concentrations of (15)N-spermidine in the liver and tumors were higher, whereas those of (15)N-spermine were higher in the kidney, probably due to the excretion of excess extracellular spermine. Most of the absorbed (15)N-putrescine seemed to be lost, suggesting blood and tissue diamine oxidase degradation. Concentrations of (15)N-spermidine and (15)N-spermine in the tumor were low. We also describe the findings from two rats that were administered with (15)N-spermine. The tissue concentrations of (15)N-spermine were unusually high, and significant levels of (15)N-spermidine were derived from (15)N-spermine in these animals.
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Affiliation(s)
- Masaki Kobayashi
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Josai University, Sakado, Saitama, Japan
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