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Etemadi F, Tabatabaei Naeini A, Aminlari M. Assessment of calcium, phosphorus, magnesium, vitamin D and PTH levels in sera of lame horses. Vet Med Sci 2023; 9:2070-2077. [PMID: 37466035 PMCID: PMC10508493 DOI: 10.1002/vms3.1198] [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: 02/10/2023] [Revised: 05/05/2023] [Accepted: 06/23/2023] [Indexed: 07/20/2023] Open
Abstract
BACKGROUND Minerals play vital roles in physiologic processes. Calcium, phosphorus and magnesium are common minerals. Secretion, absorption and homeostasis of these minerals are affected by associations between the active vitamin D and parathyroid hormone (PTH). OBJECTIVE The aim of this study was to assess concentrations of vitamin D, PTH and minerals, such as calcium, phosphorus and magnesium in horse sera, as well as associations of these values with lameness in horses. In the references, the reasons for lameness can be deficiency and imbalance of minerals, and clinical observations also confirm this and there is still not enough information regarding the relationship between mineral imbalance and lameness of horses. The prominent forms of lameness include navicular syndrome, back pain, splints, ring bone, side bone, non-infectious arthritis and bucked shins. Deficiency and inadequacy of calcium, phosphorous and magnesium have been regarded as predisposing and aggravating factors of the aforementioned diseases. MATERIALS AND METHODS This cross-sectional study was carried out on 60 horses, including 30 lame and 30 healthy adult horses, summer to fall 2021. Levels of calcium, phosphorus, magnesium, vitamin D and PTH were assessed in sera using automatic analyser, atomic absorption spectroscopy and commercially available kits. RESULTS The average level of calcium was higher healthy horses than lame horses in the two seasons (p < 0.001). The average level of inorganic phosphorus in horses was higher in summer than autumn (p < 0.001). The mean magnesium concentration in healthy horses was greater than lame horses in the two seasons (p < 0.01). In this study, the mean PTH concentration in healthy horses was lower in fall than summer (p < 0.05). CONCLUSION The low average levels of calcium and magnesium in lame horses in the two seasons indicate critical roles of calcium and magnesium in the normal function of the horse musculoskeletal system as well as prevention of lameness.
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Affiliation(s)
- Fatemeh Etemadi
- Department of Surgery and RadiologySchool of Veterinary MedicineShiraz UniversityShirazIran
| | | | - Mahmoud Aminlari
- Department of BiochemistrySchool of Veterinary MedicineShiraz UniversityShirazIran
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2
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Asl AR, Ashrafi M, Aminlari M, Taghavi S, Karimi B, Naini AT. The protective effect of pomegranate peel aqueous extract on selenite-induced cataract in rats. J Food Biochem 2022; 46:e14356. [PMID: 35894450 DOI: 10.1111/jfbc.14356] [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] [Received: 04/26/2022] [Revised: 06/20/2022] [Accepted: 07/14/2022] [Indexed: 11/27/2022]
Abstract
The present study was performed to evaluate the preventive effect of pomegranate peel extract on sodium-induced cataract in rats. Sprague-Dawley suckling male rats were divided into four groups: group C: rats received no treatment, group P: rats received pomegranate peel aqueous extract (PPE) orally, group Se: rats received an injection of sodium selenite, group Se + P: rats received PPE and sodium selenite concomitantly. After 4 weeks, rats were sacrificed, and their lenses were homogenized and evaluated for biochemical parameters and sodium dodecyl sulfate-polyacrylamide gel electrophoresis. In the Se group, developed cataract with significant lens opacity was observed. Other changes in enzymatic and non-enzymatic antioxidants, oxidative parameters, solubility of proteins, in NO and Ca levels and the electrophoresis pattern of proteins were observed in lenses of the Se group compared to control groups. After the preventive administration of PPE, most of these parameters were normalized due to antioxidant and anti-inflammatory activities of the extract. PRACTICAL APPLICATIONS: Cataract is one of the leading causes of vision impairment among the elderly, and surgery is the major therapeutic step taken to cure it. However, surgery has its limitations and complications. Therefore, prevention of cataract development, especially in high-risk individuals, can be better than cure. Pomegranate peel extract has a high potential to prevent cataract in these people.
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Affiliation(s)
- Arash Rakhshi Asl
- Department of Basic Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Mahboobeh Ashrafi
- Department of Basic Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Mahmoud Aminlari
- Department of Basic Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Saba Taghavi
- Department of Basic Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Behnaz Karimi
- Department of Basic Sciences, School of Veterinary Medicine, Shahrekord University, Shahrekord, Iran
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3
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Nasrpour S, Yousefi G, Niakosari M, Aminlari M. Nanoencapsulation of saffron crocin into chitosan/alginate interpolyelectrolyte complexes for oral delivery: A Taguchi approach to design optimization. J Food Sci 2022; 87:1148-1160. [PMID: 35150139 DOI: 10.1111/1750-3841.16052] [Citation(s) in RCA: 3] [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: 07/16/2021] [Revised: 11/22/2021] [Accepted: 12/22/2021] [Indexed: 12/18/2022]
Abstract
Crocin, as a nutraceutical component of saffron (Crocus sativus L.), possesses numerous therapeutic effects. In the current study, a crocin-loaded chitosan/alginate (CS/ALG) nanocarrier was developed for oral delivery. The influence of preparation variables including pH and the concentrations of CS, ALG, and calcium chloride (CaCl2 ) on encapsulation efficiency (EE%) and loading efficiency (LE%) of CS/ALG nanoparticles (NPs) was evaluated by L9 Taguchi orthogonal array (OA). The results showed that at 0.25% w/v CS, 0.1% w/v ALG, pH 4.5, and absence of CaCl2 , crocin was loaded into CS/ALG NPs with EE% and LE% of 91.5% and 27.4%, respectively. Ultrasonication reduced the particle sizes (PSs) up to 100 nm, and freeze-dried NPs reproduced the particles with average size of 90 nm. Scanning electron microscopy (SEM) was successfully used to characterize the structure and morphology of freeze-dried NPs, confirming very fine NPs having sizes less than 100 nm. Crocin loaded into NPs showed higher stability in simulated gastric pH 2 compared to free crocin (2.1% and 7.5% degradation at 60 min, respectively). Furthermore, a pH-dependent sustained crocin release was observed with faster release at pH 2. Overall, the very small PS along with high encapsulation efficiency and stability can enhance crocin oral bioavailability making CS/ALG nanovehicles promising as an effective delivery system. PRACTICAL APPLICATION: Crocin as a functional component of Saffron is not sufficiently stable in gastrointestinal tract and its absorption is not complete. Chitosan/Alginate nanoparticles can encapsulate it efficiently, protect it and enhance its absorption orally. The availability and simplicity of the materials and equipments employed in current research provide the possibility to industrial scale up of the Crocin nanoparticles.
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Affiliation(s)
- Samira Nasrpour
- Department of Food Science and Technology, College of Agriculture, Shiraz University, Shiraz, Iran
| | - Gholamhossein Yousefi
- Department of Pharmaceutics, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran.,Center for Nanotechnology in Drug Delivery, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mehrdad Niakosari
- Department of Food Science and Technology, College of Agriculture, Shiraz University, Shiraz, Iran
| | - Mahmoud Aminlari
- Department of Food Science and Technology, College of Agriculture, Shiraz University, Shiraz, Iran.,Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
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4
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Pashangeh S, Shekarforoush SS, Aminlari M, Hosseinzadeh S, Nizet V, Dahesh S, Rahmdel S. Inhibition of histamine accumulation by novel histamine-degrading species of Staphylococcus sp. isolated from goats and sheep milk. Food Sci Nutr 2022; 10:354-362. [PMID: 35154673 PMCID: PMC8825735 DOI: 10.1002/fsn3.2723] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 07/09/2021] [Accepted: 07/11/2021] [Indexed: 12/13/2022] Open
Abstract
Histamine is an active amine compound that occurs in various fermented foods that may cause adverse effects on the human health. Certain microorganisms are able to degrade histamine by an oxidative deamination reaction. Therefore, the present study aimed to quantify histamine-forming and/or -degrading activity of the isolates derived from milk of goat and sheep herds, in Iran, by the capillary zone electrophoresis (CZE) method; and we evaluated the molecular characteristics of staphylococcal isolates. Among 243 staphylococcal isolates, 29 histamine-degrading bacteria were identified. One of these isolates, identified as Staph. epidermidis, No. 605, exhibited the highest activity compared to others, degrading available histamine to 58.33% within 24 h. By polymerase chain reaction (PCR) analysis, the isolate, No. 605 that exhibited remarkable histamine-degrading activity lacked the genes encoding coagulase and DNase, nor did it harbor any of the five classical enterotoxin genes. This is the first report to show that seven Staphylococcus species, including Staph. chromogenes, Staph. aureus, Staph. haemolyticus, Staph. epidermidis, Staph. pseudintermedius, Staph. agnetis, and Staph. hyicus, were able to degrade histamine, which were hitherto not known to have this capacity. Therefore, histamine-degrading activity is a definite criterion to introduce fermenting organisms able to decrease histamine content in different food products.
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Affiliation(s)
- Safoora Pashangeh
- Department of Food Hygiene and Public HealthSchool of Veterinary MedicineShiraz UniversityShirazIran
| | | | - Mahmoud Aminlari
- Department of BiochemistrySchool of Veterinary MedicineShiraz UniversityShirazIran
| | - Saeid Hosseinzadeh
- Department of Food Hygiene and Public HealthSchool of Veterinary MedicineShiraz UniversityShirazIran
| | - Victor Nizet
- Department of PediatricsSkaggs School of Pharmacy and Pharmaceutical SciencesUniversity of California, San DiegoLa JollaCaliforniaUSA
| | - Samira Dahesh
- Department of PediatricsSkaggs School of Pharmacy and Pharmaceutical SciencesUniversity of California, San DiegoLa JollaCaliforniaUSA
| | - Samane Rahmdel
- Department of Food Hygiene and Public HealthSchool of Veterinary MedicineShiraz UniversityShirazIran
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Zarei Jelyani A, Tavakoli J, Lashkari H, Aminlari M. Different effect of chemical refining process on Baneh ( Pistacia atlantica var mutica) kernel oil: Regeneration of tocopherols. Food Sci Nutr 2021; 9:5557-5566. [PMID: 34646525 PMCID: PMC8498077 DOI: 10.1002/fsn3.2515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 11/12/2022] Open
Abstract
The present study was conducted to investigate the impact of refining process on the chemical properties (fatty acid composition and tocopherols, sterols, and polyphenolic contents), qualitative parameters (peroxide value, acid value, and p-anisidine value), and antioxidant activity (DPPH radical scavenging assay and FRAP test) of Baneh (Pistacia atlantica var mutica) kernel oil. The results revealed that the refining process had no significant effect on the fatty acid composition. A major finding of this research was the increase in the tocopherol and sterol content up to the bleaching stage followed by their decrease in the deodorizing phase. Some tocopherol and sterol compounds in crude oil were dimerized or attached to other compounds by ester bonding, which are released during some stages of the refining process and this factor is responsible for their increase. In fact, during this process, these compounds are regenerated. The occurrence of this phenomenon in the refining process improved the DPPH radical scavenging power of Baneh kernel oil up to the bleaching stage. Moreover, the content of phenolic compounds decreased after refining of Baneh kernel oil, and only in the deodorizing stage, an increase of these compounds was observed. In general, the results of this study showed that the refining process had a completely different effect on the antioxidant compounds (especially tocopherols) compared to other oils.
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Affiliation(s)
- Aniseh Zarei Jelyani
- Food Science and Technology DepartmentSarvestan BranchIslamic Azad UniversitySarvestanIran
| | - Javad Tavakoli
- Department of Food Science and TechnologyFaculty of AgricultureJahrom UniversityJahromIran
| | - Hannan Lashkari
- Department of Food Science and TechnologyZarin Dasht BranchIslamic Azad UniversityZarin DashtIran
| | - Mahmoud Aminlari
- Department of BiochemistrySchool of Veterinary MedicineShiraz UniversityShirazIran
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6
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Khorsandi A, Eskandari MH, Aminlari M, Shekarforoush SS, Golmakani MT. Shelf-life extension of vacuum packed emulsion-type sausage using combination of natural antimicrobials. Food Control 2019. [DOI: 10.1016/j.foodcont.2019.04.040] [Citation(s) in RCA: 7] [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: 10/26/2022]
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7
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Basaki M, Tabandeh MR, Aminlari M, Asasi K, Mohsenifard E, Abdi-Hachesoo B. Sequence and expression analysis of cardiac ryanodine receptor 2 in broilers that died from sudden death syndrome. Avian Pathol 2019; 48:444-453. [PMID: 31081346 DOI: 10.1080/03079457.2019.1618439] [Citation(s) in RCA: 2] [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] [Indexed: 01/09/2023]
Abstract
Sudden death syndrome (SDS) is a stress-related disease in broilers with no diagnostic clinical or necropsy findings. SDS is associated with ventricular tachycardia (VT) and ventricular fibrillation (VF); however, its pathogenesis is not precisely described at the molecular level. Dysfunction of ryanodine receptor 2 (RYR2), that controls rapid release of Ca2+ from the sarcoplasmic reticulum (SR) into the cytosol during muscle contraction, has been associated with VT and sudden cardiac death (SCD) in human patients with structurally normal heart, but there is no report describing abnormalities in RYR2 in diseased broilers. In order to advance our knowledge on the molecular mechanisms predisposing broilers to fatal arrhythmia, the present study was conducted to determine the occurrence of possible mutations and changes in the expression level of the chicken RYR2 gene (chRYR2) in broilers that died from SDS. An increase in mRNA expression level and nine novel point mutations in chRYR2 were found in relation to SDS. In conclusion, susceptibility to lethal cardiac arrhythmia in SDS may be associated with specific changes in intracellular Ca2+ cycling components such as RYR2 due to mutation and dysregulation. Finding the probable association of SDS with gene defects can be applied to select for chickens with lower susceptibility to SDS and decrease the poultry industry losses due to SDS mortality. RESEARCH HIGHLIGHTS Investigation of the occurrence of possible mutations and changes in the expression level of chicken RYR2 gene (chRYR2) in broilers that died from SDS. Increase in the mRNA expression level of chRYR2 in relation to SDS. Nine novel point mutations in chRYR2 of broilers that died from SDS. Possible connection between susceptibility to lethal cardiac arrhythmia in SDS and changes in intracellular Ca2+ cycling machinery, such as RYR2, due to mutation and dysregulation.
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Affiliation(s)
- M Basaki
- Department of Basic Sciences, School of Veterinary Medicine, University of Tabriz , Tabriz , Iran
| | - M R Tabandeh
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz , Ahvaz , Iran
| | - M Aminlari
- Department of Biochemistry, School of Veterinary Medicine, Shiraz University , Shiraz , Iran
| | - K Asasi
- Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University , Shiraz , Iran
| | - E Mohsenifard
- Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University , Shiraz , Iran
| | - B Abdi-Hachesoo
- Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University , Shiraz , Iran
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8
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Barghi M, Ashrafi M, Aminlari M, Namazi F, Nazifi S. The protective effect of Zataria multiflora Boiss essential oil on CCl 4 induced liver fibrosis in rats. Drug Chem Toxicol 2019; 44:229-237. [PMID: 30746963 DOI: 10.1080/01480545.2019.1571502] [Citation(s) in RCA: 2] [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] [Indexed: 12/13/2022]
Abstract
Activation of hepatic stellate cells by free radicals is an initial step in the development of liver fibrosis. Zataria multiflora Boiss (ZM) essential oil as a natural product has antioxidant activity and maybe a suitable candidate for treatment or prevention of the disease. Thus, this study aims to evaluate the protective effect of ZM oil in CCl4 induced liver fibrosis. Male rats were divided into 5 groups, group C: control rats; CO: vehicle control group; CE: rats that received essential oil (500 µl/kg); F: fibrosis group, rat were intraperitoneally injected with CCl4 (1 mL/kg); FE: fibrosis rats that received both CCl4 and ZM essential oil as mentioned above. At the end of the 11th week, serum samples and liver tissues were collected for the evaluation of fibrosis markers, liver enzymes, oxidative stress parameters and histopathological studies. The results showed a significant increase in the activity of serum AST, ALT, total bilirubin, TGF-β1, hyaluronan, and hydroxyproline levels in serum and liver tissues in F group. Also, an abnormality in lipid profile and the existence of oxidative stress was found in serum and liver tissues in F group compared to the control groups. Our study showed that ZM essential oil could ameliorate mentioned parameters. Histopathological examinations confirmed the results of biochemical evaluations.
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Affiliation(s)
- Maryam Barghi
- Department of Basic Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Mahboobeh Ashrafi
- Department of Basic Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Mahmoud Aminlari
- Department of Basic Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Fateme Namazi
- Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Saeed Nazifi
- Department of Clinical Studies, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
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9
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Khorsandi A, Ziaee E, Shad E, Razmjooei M, Eskandari MH, Aminlari M. Antibacterial Effect of Essential Oils against Spoilage Bacteria from Vacuum-Packed Cooked Cured Sausages. J Food Prot 2018; 81:1386-1393. [PMID: 30019960 DOI: 10.4315/0362-028x.jfp-17-474] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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: 01/23/2023]
Abstract
Nonfermented sausages, which have a pH of around 6.0, a low salt concentration, and high moisture with a water activity higher than 0.95, are highly perishable. In this study, culture-dependent techniques and 16S rDNA approaches were used to identify the presumptive spoilage lactic acid bacteria (LAB) in sliced vacuum-packed cooked sausage during storage at 4°C. The antibacterial properties of essential oils (EOs) from the medicinal plants Carum carvi, Cinnamomum zeylanicum, Curcuma longa, Citrus medica, and Eugenia caryophyllata against isolated LAB were also investigated. A total of 106 colonies were obtained on de Man Rogosa Sharpe medium after storage of sausages samples, and 16 isolates were identified from conventional morphological analysis of the bacterial populations. DNA extraction and 16S rDNA analysis indicated that Lactobacillus curvatus, Weissella viridescens, Leuconostoc mesenteroides, Enterococcus faecium, Lactobacillus reuteri, Lactobacillus dextrinicus, Lactobacillus sakei, and Pediococcus dextrinicus were the main spoilage LAB. The antibacterial properties of EOs against isolated LAB were indicated by inhibition zones on culture plates of 7.8 to 31 mm, depending on the susceptibility of the tested LAB strain. The MICs and MBCs of five EOs were determined. The most effective EO against the LAB was C. zeylanicum followed by C. carvi and C. medica, and the least effective EO was C. longa. The EO from C. zeylanicum had the highest antimicrobial activity (lowest MICs) against LAB, with EO MICs of 4.66 to 5.33 μL/mL. The most susceptible isolate was L. mesenteroides, with a MIC of 4.66 μL/mL for the C. zeylanicum EO. These data indicate that the EO from C. zeylanicum could be used as a natural preservative for vacuum-packed emulsion-type sausage.
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Affiliation(s)
- Azita Khorsandi
- 1 Department of Food Science and Technology, School of Agriculture, and
| | - Esmaeil Ziaee
- 1 Department of Food Science and Technology, School of Agriculture, and
| | - Ehsan Shad
- 1 Department of Food Science and Technology, School of Agriculture, and
| | - Maryam Razmjooei
- 1 Department of Food Science and Technology, School of Agriculture, and
| | | | - Mahmoud Aminlari
- 1 Department of Food Science and Technology, School of Agriculture, and.,2 Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Shiraz 7144165186, Iran
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10
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Mirzaei M, Mirdamadi S, Ehsani MR, Aminlari M. Production of antioxidant and ACE-inhibitory peptides from Kluyveromyces marxianus protein hydrolysates: Purification and molecular docking. J Food Drug Anal 2018; 26:696-705. [PMID: 29567240 PMCID: PMC9322238 DOI: 10.1016/j.jfda.2017.07.008] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 06/24/2017] [Accepted: 07/21/2017] [Indexed: 11/06/2022] Open
Abstract
Kluyveromyces marxianus protein hydrolysates were prepared by two different sonicated-enzymatic (trypsin and chymotrypsin) hydrolysis treatments to obtain antioxidant and ACE-inhibitory peptides. Trypsin and chymotrypsin hydrolysates obtained by 5 h, exhibited the highest antioxidant and ACE-inhibitory activities. After fractionation using ultra-filtration and reverse phase high performance liquid chromatography (RP-HPLC) techniques, two new peptides were identified. One fragment (LL-9, MW = 1180 Da) with the amino acid sequence of Leu-Pro-Glu-Ser-Val-His-Leu-Asp-Lys showed significant ACE inhibitory activity (IC50 = 22.88 μM) while another peptide fragment (VL-9, MW = 1118 Da) with the amino acid sequence of Val-Leu-Ser-Thr-Ser-Phe-Pro-Pro-Lys showed the highest antioxidant and ACE inhibitory properties (IC50 = 15.20 μM, 5568 μM TE/mg protein). The molecular docking studies revealed that the ACE inhibitory activities of VL-9 is due to interaction with the S2 (His513, His353, Glu281) and S’1 (Glu162) pockets of ACE and LL-9 can fit perfectly into the S1 (Thr345) and S2 (Tyr520, Lys511, Gln281) pockets of ACE.
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11
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Keramat M, Golmakani MT, Aminlari M, Shekarforoush SS. Improving Oxidative Stability of Virgin Olive Oil: Comparison of Zataria Multiflora Essential Oil with α-Tocopherol. Nutr Food Sci Res 2018. [DOI: 10.29252/nfsr.5.2.19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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12
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Koshani R, Aminlari M. Physicochemical and functional properties of ultrasonic-treated tragacanth hydrogels cross-linked to lysozyme. Int J Biol Macromol 2017; 103:948-956. [DOI: 10.1016/j.ijbiomac.2017.05.124] [Citation(s) in RCA: 10] [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] [Received: 07/17/2016] [Revised: 10/29/2016] [Accepted: 05/19/2017] [Indexed: 11/28/2022]
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13
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Forghani Z, Eskandari MH, Aminlari M, Shekarforoush SS. Effects of microbial transglutaminase on physicochemical properties, electrophoretic patterns and sensory attributes of veggie burger. J Food Sci Technol 2017; 54:2203-2213. [PMID: 28740276 DOI: 10.1007/s13197-017-2614-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 01/07/2017] [Accepted: 03/28/2017] [Indexed: 10/19/2022]
Abstract
The main objective of this study was to investigate the effects of microbial-transglutaminase (MTGase 0-0.75%)/sodium-caseinate (SC 0-2%) as crosslinker agents on proximate analysis, binding properties (expressible moisture and shrinkage), texture analysis, electrophoretic patterns, instrumental color, and sensory properties of veggie burgers. Addition of SC and MTGase positively affected shrinkage and expressible moisture. It also increased hardness, springiness, chewiness, and cutting-force of burgers. Presence of SC had no effects on cohesiveness of burgers. Total protein and ash of samples were increased by treatment with SC. The lightness (L*) of samples was significantly decreased by 0.75% MTGase. No significant influence of SC on samples color parameters was observed. The results indicated that distinct protein bands were not formed on the SDS-PAGE of burger samples and resulted in a smearing pattern on the gel. When soy-protein was incubated with MTGase, a progressive decrease in the intensity of the bands corresponding to the subunits 7S and 11S globulins was observed concomitant with disappearance of A3 and B3 bands. Electrophoresis pattern of gluten was slightly changed after MTGase treatment. There were significant differences in color, taste, appearance, mouth feel, and overall acceptability between treated and control samples. Results suggest that production of veggie burgers using MTGase alone or in combination with SC brings about covalent cross-linking between homologous and heterologous proteins to form high-molecular weight polymers, thereby improving the mechanical properties of veggie burgers and profoundly increases the acceptability of the end product.
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Affiliation(s)
- Zahra Forghani
- Department of Food Science and Technology, School of Agriculture, Shiraz University, Shiraz, Iran
| | - Mohammad Hadi Eskandari
- Department of Food Science and Technology, School of Agriculture, Shiraz University, Shiraz, Iran
| | - Mahmoud Aminlari
- Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
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14
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Borzooeian Z, Taslim ME, Borzooeian G, Ghasemi O, Aminlari M. Activity and stability analysis of covalent conjugated lysozyme-single walled carbon nanotubes: potential biomedical and industrial applications. RSC Adv 2017. [DOI: 10.1039/c7ra07189b] [Citation(s) in RCA: 10] [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: 12/31/2022] Open
Abstract
Analysis of covalent conjugated lysozyme-single walled carbon nanotubes.
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Affiliation(s)
- Z. Borzooeian
- Department of Mechanical and Industrial Engineering
- College of Engineering
- Northeastern University
- Boston
- USA
| | - M. E. Taslim
- Department of Mechanical and Industrial Engineering
- College of Engineering
- Northeastern University
- Boston
- USA
| | - G. Borzooeian
- Department of Biology
- Payame Noor University of Isfahan
- Iran
| | - O. Ghasemi
- Takeda Pharmaceuticals USA Inc
- Cambridge
- USA
| | - M. Aminlari
- Department of Biochemistry
- School of Veterinary Medicine
- Shiraz University
- Shiraz
- Iran
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Abstract
Arginase (EC 3.5.3.1), the final enzyme in the urea cycle, catalyses the hydrolysis of L-arginine to L-ornithine and urea. High activity of this enzyme in the liver indicates its primary role in ammonia detoxification. However, its wide tissue distribution suggests that this enzyme might perform other functions besides hepatic ureagenesis. Although the distribution and properties of arginase from many tissues of human, laboratory animals and some domestic animals have been studied, little is known about the pattern of distribution and physiological roles of this enzyme in the cat. The purpose of this study was to examine and compare the distribution of arginase in different tissues of the cat. A selection of tissue samples was assayed for arginase by the diacetyl monoxime method of determination of enzymatically formed urea. The protein content of tissues and enzymatic activities were calculated as units per gram tissue and units per milligram protein of the tissue. Results showed that the liver was the richest source of arginase followed by the oesophageal and tongue mucosal layers. Significant activity of this enzyme was found in the mucosa of the small intestine, kidney cortex, lung, testis and ovary. The results of this study will be discussed in terms of the involvement of arginase in several biochemical and physiological functions in this species.
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Affiliation(s)
- Mahmoud Aminlari
- Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Shiraz 71345, Iran.
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Abstract
The purpose of this study was to prepare protein-coated potato chips and evaluate type of proteins and storage time on the quality of final product. Potato slices were prepared, blanched, immersed in solutions of sodium caseinate, whey proteins concentrate (WPC), or egg white and deep-fried in a mixture of corn oil and commercial hydrogenated oil. Chips were packed and stored for different times. The results showed that sodium bisulphite in blanching solution improved binding of proteins to potato slices. Protein coating resulted in significantly lower oil uptake of potato chips. Coating potato chips with sodium caseinate, WPC and egg white proteins resulted in 14, 5 and 12% reduction in oil uptake, respectively. Water retention and protein content significantly increased in protein-coated chips. Peroxide values increased with storage time in all samples. Protein-coated chips had a decrease in peroxide value between 30 to 50%. Sensory evaluation of chips showed that at all storage time intervals, flavour of sodium caseinate-coated chips were more acceptable than non-coated, WPC or egg white protein-coated chips.
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Affiliation(s)
- M. Aminlari
- Department of Food Science and Technology, Agricultural School, Shiraz University, Shiraz, 71444, Iran,
| | - R. Ramezani
- Department of Food Science and Technology, Agricultural School, Shiraz University, Shiraz, 71444, Iran
| | - M. H. Khalili
- Department of Food Science and Technology, Agricultural School, Shiraz University, Shiraz, 71444, Iran
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Abstract
Enzymatic hydrolysis has been widely applied for production of protein hydrolysate from shrimp waste and for purification of chitin. In the present study, shrimp (P. semisulcatus) head waste was hydrolysed, using a commercial proteolytic enzyme, Alcalase. In order to improve protein extraction efficiency, certain chemicals such as sodium sulphite and Triton x-100 were used along with the enzyme. When Alcalase (12 AU/kg) used alone, the yield of protein extraction was 45.1% and by using Triton x-100 (0.01 g/kg) together with Alcalase, the yield was decreased to 39%, whereas the presence of sodium sulphite (200 mmol/L) with the enzyme or with the enzyme and Triton x-100 increased the level of protein extraction to 62% and 65.1%, respectively. The resulting protein powder contained sufficient amounts of essential amino acids to be used in feed formulations. By precipitating proteins from the resulting protein extract at pH 3.1, the residual sulphite in protein powder was decreased by 97% and thus the powder can be considered suitable for animal and/or aquaculture feed formulations.
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Affiliation(s)
- M. Mizani
- Departmentof Food Science and Technology, Science and Research Campus, Azad University, P.O. Box 14155-4933, Tehran, Iran
| | - M. Aminlari
- Departmentof Biochemistry, School of Veterinary Medicine, Shiraz University, Shiraz 71345, Iran
| | - M. Khodabandeh
- Biological Product Group, National Research Center for Genetic Engineering and Biotechnology, P.O. Box 14155-6343, Tehran, Iran
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Keramat M, Golmakani MT, Aminlari M, Shekarforoush SS. Comparative Effect of Bunium persicum and Rosmarinus officinalis Essential Oils and Their Synergy with Citric Acid on the Oxidation of Virgin Olive Oil. International Journal of Food Properties 2016. [DOI: 10.1080/10942912.2015.1126722] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Malihe Keramat
- Department of Food Science and Technology, School of Agriculture, Shiraz University, Shiraz, Islamic Republic of Iran
| | - Mohammad-Taghi Golmakani
- Department of Food Science and Technology, School of Agriculture, Shiraz University, Shiraz, Islamic Republic of Iran
| | - Mahmoud Aminlari
- Department of Basic Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Islamic Republic of Iran
| | - Seyed Shahram Shekarforoush
- Department of Food Hygiene and Public Health, School of Veterinary Medicine, Shiraz University, Shiraz, Islamic Republic of Iran
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Mirzaei M, Aminlari M, Hosseini E. Antioxidant, ACE-Inhibitory and Antimicrobial Activities of Kluyveromyces marxianus Protein Hydrolysates and Their Peptide Fractions. FFHD 2016. [DOI: 10.31989/ffhd.v6i7.250] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Background: There has been some evidence that proteins are potentially excellent source of antioxidants, antihypertensive and antimicrobial peptides and enzymatic hydrolysis is an effective method to release these peptides from protein molecules. The functional properties of protein hydrolysates depends on the protein substrate, the specificity of the enzymes, the conditions used during proteolysis, degree of hydrolysis, and the nature of peptides released including molecular weight, amino acid composition, and hydrophobicity.Context and purpose of this study: The biomass of Kluyveromyces marxianus was considered as a source of ACE inhibitory, antioxidant and antimicrobial peptides. Results: Autolysis and enzymatic hydrolysis were completed respectively, after 96 h and 5 h. Overall, trypsin (18.52% DH) and chymotrypsin (21.59% DH) treatments were successful in releasing antioxidant and ACE inhibitory peptides. Autolysate sample (39.51% DH) demonstrated a poor antioxidant and ACE inhibitory activity compared to trypsin and chymotrypsin hydrolysates. The chymotrypsin 3-5 kDa (301.6±22.81 μM TEAC/mg protein) and trypsin< 3 kDa (280.16±39.16) permeate peptide fractions showed the highest DPPH radical scavenging activity. The trypsin <3 kDa permeate peptide fraction showed the highest ABTS radical scavenging (1691.1±48.68 μMTE/mg protein) and ACE inhibitory (IC50=0.03±0.001 mg/ml) activities. The fraction (MW=5-10 kD) obtained after autolysis treatment showed antibacterial activity against St. aureus and Lis. monocytogenes in well diffusion screening. The minimum inhibitory concentration (MIC) value was 13.3 mg/ml against St. aureus and Lis. monocytogenes calculated by turbidimetric assay and it showed bactericidal activity against St. aureus at 21.3 mg/ml protein concentration. Conclusions: Taken together, the results of this study reveal that K. marxianus proteins contain specific peptides in their sequences which can be released by enzymatic hydrolysis and autolysis. Key words: Kluyveromyces marxianus; Antioxidant activity; ACE-inhibitory; Antimicrobial; Protein hydrolysate; Peptide
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Keramat M, Golmakani MT, Aminlari M, Shekarforoush S. Oxidative Stability of Virgin Olive Oil Supplemented withZataria multifloraBoiss. andRosmarinus officinalisL. Essential Oils During Accelerated Storage. J FOOD PROCESS PRES 2016. [DOI: 10.1111/jfpp.12951] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Malihe Keramat
- Department of Food Science and Technology, School of Agriculture; Shiraz University; Shiraz 71441-65186 Iran
| | - Mohammad-Taghi Golmakani
- Department of Food Science and Technology, School of Agriculture; Shiraz University; Shiraz 71441-65186 Iran
| | - Mahmoud Aminlari
- Department of Basic Sciences, School of Veterinary Medicine; Shiraz University; Shiraz Iran
| | - Shahram Shekarforoush
- Department of Hygiene and Food Quality Control, School of Veterinary Medicine; Shiraz University; Shiraz Iran
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Basaki M, Asasi K, Tabandeh MR, Aminlari M. Polymorphism identification and cardiac gene expression analysis of the calsequestrin 2 gene in broiler chickens with sudden death syndrome. Br Poult Sci 2016; 57:151-60. [DOI: 10.1080/00071668.2015.1099615] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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Esmaeilpour M, Ehsani MR, Aminlari M, Shekarforoush S, Hoseini E. Antimicrobial activity of peptides derived from enzymatic hydrolysis of goat milk caseins. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/s00580-016-2237-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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23
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Basiri S, Shekarforoush SS, Aminlari M, Akbari S. Corrigendum to “The effect of pomegranate peel extract (PPE) on the polyphenol oxidase (PPO) and quality of Pacific white shrimp (Litopenaeus vannamei) during refrigerated storage” [LWT – Food Sci and Technol 60 (2015) 1025–1033]. Lebensm Wiss Technol 2015. [DOI: 10.1016/j.lwt.2015.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Koshani R, Aminlari M, Niakosari M, Farahnaky A, Mesbahi G. Production and properties of tragacanthin-conjugated lysozyme as a new multifunctional biopolymer. Food Hydrocoll 2015. [DOI: 10.1016/j.foodhyd.2014.12.023] [Citation(s) in RCA: 19] [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] [Indexed: 10/24/2022]
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25
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Hashemi MM, Aminlari M, Moosavinasab M. Preparation of and studies on the functional properties and bactericidal activity of the lysozyme–xanthan gum conjugate. Lebensm Wiss Technol 2014. [DOI: 10.1016/j.lwt.2014.01.040] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Aminlari L, Hashemi MM, Aminlari M. Modified lysozymes as novel broad spectrum natural antimicrobial agents in foods. J Food Sci 2014; 79:R1077-90. [PMID: 24837015 DOI: 10.1111/1750-3841.12460] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [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: 12/20/2013] [Accepted: 03/15/2014] [Indexed: 11/27/2022]
Abstract
UNLABELLED In recent years much attention and interest have been directed toward application of natural antimicrobial agents in foods. Some naturally occurring proteins such as lactoperoxidase, lactoferrin, and lysozyme have received considerable attention and are being considered as potential antimicrobial agents in foods. Lysozyme kills bacteria by hydrolyzing the peptidoglycan layer of the cell wall of certain bacterial species, hence its application as a natural antimicrobial agent has been suggested. However, limitations in the action of lysozyme against only Gram-positive bacteria have prompted scientists to extend the antimicrobial effects of lysozyme by several types of chemical modifications. During the last 2 decades extensive research has been directed toward modification of lysozyme in order to improve its antimicrobial properties. This review will report on the latest information available on lysozyme modifications and examine the applicability of the modified lysozymes in controlling growth of Gram-positive and Gram-negative bacteria in foods. The results of modifications of lysozyme using its conjugation with different small molecule, polysaccharides, as well as modifications using proteolytic enzymes will be reviewed. These types of modifications have not only increased the functional properties of lysozyme (such as solubility and heat stability) but also extended the antimicrobial activity of lysozyme. Many examples will be given to show that modification can decrease the count of Gram-negative bacteria in bacterial culture and in foods by as much as 5 log CFU/mL and in some cases essentially eliminated Escherichia coli. In conclusion this review demonstrates that modified lysozymes are excellent natural food preservatives, which can be used in food industry. PRACTICAL APPLICATION The subject described in this review article can lead to the development of methods to produce new broad-spectrum natural antimicrobial agents, based on modification of chicken egg white lysozyme, which might potentially replace the currently used synthetic food preservatives.
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Affiliation(s)
- Ladan Aminlari
- Dept. of Food Hygiene and Public Health, School of Veterinary Medicine, Shiraz Univ, Shiraz, Iran
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Zarasvand SA, Kadivar M, Aminlari M, Shekarforoush SS. A comparative study of physico-chemical and functional properties, and ultrastructure of ostrich meat and beef during aging. CyTA - Journal of Food 2012. [DOI: 10.1080/19476337.2011.631221] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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28
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Farahnaky A, Allahdad Z, Aminlari M, Majzoobi M, Askari H, Ramezani R. Rheological behaviour of dextran sulfate solutions. International Journal of Food Engineering 2012. [DOI: 10.1515/1556-3758.2139] [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] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The purpose of this research was to study the rheological behaviour of dextran sulfate solutions under different conditions. A PC controlled rotational viscometer with a cone and plate geometry equipped with a temperature controlled unit was used to measure apparent viscosity of dextran solutions at different temperatures (25, 40 and 60 oC) and concentrations (2, 5, 10 and 20%). Viscosity tests of dextran sulfate solutions were performed at a range of shear rates (8-230 1/s) and the rheological data were fitted using the Power Law equation to get consistency and flow behaviour indices. The results indicated that all dextran sulfate solutions showed Newtonian flow behaviour. The viscosity of dextran sulfate solutions was significantly affected by temperature, e.g. the viscosity of a 5% solution at 25, 40 and 60 oC was 16.7, 12.7 and 10.7 mPa.s, respectively.
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Eskandari MH, Hosseini A, Alasvand Zarasvand S, Aminlari M. Cloning, Expression, Purification and Refolding of Caprine Prochymosin. FOOD BIOTECHNOL 2012. [DOI: 10.1080/08905436.2012.670829] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abbasvali M, Shekarforoush SS, Aminlari M, Ebrahimnejad H. Effects of medium-voltage electrical stimulation on postmortem changes in fat-tailed sheep. J Food Sci 2011; 77:S47-53. [PMID: 22122156 DOI: 10.1111/j.1750-3841.2011.02463.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Effects of different medium-voltage electrical stimulation (ES) and ageing on postmortem changes in longissimus dorsi muscle of the fat-tailed sheep were studied. Fifteen male animals were divided into 5 equal groups (n= 3) including: T₁ (control, without ES), T₂ (100 V/30 s), T₃ (100 V/60 s), T₄ (150 V/30 s), and T₅ (150 V/60 s) with fixed frequency of 50 Hz. Five minutes after sticking, the carcasses were stimulated in order of the treatments. After normal processing, they were kept at 6 °C for 14 d. ES accelerated the glycolytic rate resulting in a significant fast fall in pH (P < 0.05) during the 1st 6-h postmortem (PM) with a gradual decline until 24-h PM, and a simultaneous significant reduction in adenosine triphosphate (ATP) content (P < 0.05). There was a significant (P < 0.05) decline in the total calpain activity during the 1st 6-h PM. The muscles from ES carcasses had significantly (P < 0.05) lower water holding capacity (WHC) than those from nonstimulated ones. Ageing revealed a significant (P < 0.05) effect on the reduction of WHC. No significant difference was found for the mean value of the muscle color (L*, a*, and b*) in all treatment groups during ageing (P > 0.05). The results of free amino acid (FAA) content and myofibrillar fragmentation index (MFI) revealed a significant improvement of proteolysis and tenderness by ES and ageing (P < 0.05). In the present study, higher voltage/duration (150 V/60 s) showed greater effects and significantly accelerated glycolysis, pH decline, and ATP depletion and thus decreased the time for rigor completion and improved the tenderness.
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Affiliation(s)
- Maryam Abbasvali
- Department of Food Hygiene and Public Health, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
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Shahbazkia HR, Shareghi B, Aminlari M. Glycated Hemoglobin is an Indicator of Blood Glucose Status in Horses: Preliminary Study. J Equine Vet Sci 2010. [DOI: 10.1016/j.jevs.2009.11.007] [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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Shahbazkia HR, Aminlari M, Tavasoli A, Mohamadnia AR, Cravador A. Associations among milk production traits and glycosylated haemoglobin in dairy cattle; importance of lactose synthesis potential. Vet Res Commun 2009; 34:1-9. [DOI: 10.1007/s11259-009-9324-2] [Citation(s) in RCA: 10] [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] [Accepted: 10/02/2009] [Indexed: 11/29/2022]
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Abstract
The purpose of this research was to conjugate lysozyme with dextran sulfate (DS) under mild Maillard reaction conditions and to investigate the functional properties of the resulting conjugate. The covalent attachment of DS to lysozyme was confirmed by SDS-PAGE and cation-exchange chromatography. Lytic activity of the conjugated and uncongugated lysozyme toward Micrococcus lysodeikticus was 40 and 71% that of native lysozyme, respectively. The lysozyme-DS conjugate was highly soluble at alkaline pH values and different temperatures (25, 40, and 60 degrees C). Moreover, the modified lysozyme exhibited increased heat stability, with better emulsion activity and emulsion stability than those of unmodified proteins. Lysozyme-DS conjugate showed antibacterial activity and significantly inhibited growth of Staphylococcus aureus and Escherichia coli in a dose-dependent manner. Taken together, the result of this study demonstrated that conjugation might increase the applicability of lysozyme in different food products for improving functional properties.
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Affiliation(s)
- Zahra Alahdad
- Department of Food Science and Technology, School of Agriculture
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36
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Aminlari M, Shekarforoush S, Gheisari H, Golestan L. Effect of Actinidin on the Protein Solubility, Water Holding Capacity, Texture, Electrophoretic Pattern of Beef, and on the Quality Attributes of a Sausage Product. J Food Sci 2009; 74:C221-6. [DOI: 10.1111/j.1750-3841.2009.01087.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [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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Abstract
The enzyme rhodanese (EC 2.8.1.1) is an ubiquitous enzyme which is present in all living organisms, from bacteria to man. It is speculated that this enzyme plays a central role in cyanide detoxification. However, its wide tissue distribution suggests this enzyme might perform other functions beside cyanide detoxification. Although the distribution of rhodanese in different tissues of human and domestic animals has been studied, little is known about the pattern of distribution and physiological roles of this enzyme in the cat. The purpose of this investigation was to determine the enzyme levels and compare the distribution of this enzyme in different tissues of the cat. A selection of tissue samples was assayed for rhodanese activity. The protein content of tissue extracts and enzymatic activities were calculated as units per gram tissue and units per milligram protein of the tissue. Results showed that in terms of units per milligram protein of the tissue (specific activity of the enzyme), colon and rectum mucosal layers and testis were the richest sources of the enzyme followed by ovary, mucosal layer of jejunum and liver. With respect to units/gram tissue, liver followed by testis, colon and rectum mucosal layers, ovary and mucosa of jejunum exhibited highest activities. The results of this study will allow one to speculate on the involvement of rhodanese in several biochemical and physiological functions in different tissues and organs of this species.
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Affiliation(s)
- Homayon Reza Shahbazkia
- Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Shiraz 71345–1731, Iran
| | - Mahmoud Aminlari
- Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Shiraz 71345–1731, Iran
| | - Maryam Tavana
- Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Shiraz 71345–1731, Iran
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Amiri S, Ramezani R, Aminlari M. Antibacterial activity of dextran-conjugated lysozyme against Escherichia coli and Staphylococcus aureus in cheese curd. J Food Prot 2008; 71:411-5. [PMID: 18326197 DOI: 10.4315/0362-028x-71.2.411] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The purposes of this research were to glycosylate lysozyme with dextran under Maillard reaction conditions and assess the antimicrobial characteristics of the lysozyme-dextran conjugate in a culture medium and cheese curd. Solutions containing lysozyme and dextran were incubated at 60 degrees C and at 79% relative humidity. Gel permeation chromatography and sodium dodecyl sulfate-polyacrylamide gel electrophoresis were used to follow the glycosylation process. Under optimum conditions 3.7 mol of dextran were coupled to 1 mol of lysozyme. Lytic activity of the conjugate against the cell wall of Micrococcus luteus was about 62% of that of native lysozyme. Evaluation of the lysozyme-dextran conjugate against test microorganisms (Staphylococcus aureus and Escherichia coli) in culture media indicated a progressive increase in antimicrobial activity, with an increase in enzyme-conjugate concentration. The lysozyme-dextran conjugate was also effective against E. coli in a natural food system, as it reduced the bacterial count by 3 log in cheese curd after 40 days of storage. Unlike E. coli, the antimicrobial action of lysozyme against S. aureus was not improved by conjugation with dextran in both in vitro and in vivo tests. Antimicrobial activity of the lysozyme-dextran conjugate against gram-negative bacteria is probably related to the remaining lytic activity as well as the excellent surfactant properties of the lysozyme-dextran conjugate. These results might increase the applicability of lysozyme as a natural antimicrobial ingredient in different food products.
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Affiliation(s)
- S Amiri
- Department of Food Science and Technology, School of Agriculture, Shiraz University, Shiraz, 71345, Iran
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Abstract
Rhodanese (thiosulfate: cyanide sulfurtransferase, EC. 2.8.1.1) is a ubiquitous enzyme present in all living organisms, from bacteria to humans and plays a central role in cyanide detoxification. The purpose of this investigation is to determine and compare rhodanese activity in different tissues of adult male and female goats (Capra hircus). The results showed that the specific activity of rhodanese in different tissues was significantly different (P<0.05). The highest activity of rhodanese was in epithelium of rumen, followed by epithelia of reticulum and omasum and liver. No significant difference was observed when tissues of male and female goats were compared. The lowest specific activity of rhodanese was observed in spleen, urinary bladder, lymph node, ovary, skeletal muscle and pyloric muscle of abomasum. The results of this study may indicate the involvement of rhodanese in cyanide detoxification in goat tissues that have greater potential to be exposed to higher levels of cyanide.
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Affiliation(s)
- Saeed Nazifi
- Department of Clinical Studies, School of Veterinary Medicine, Shiraz University, Shiraz 71345, Iran.
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40
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41
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Aminlari M, Majzoobi M. Effect of Chemical Modification, pH Change, and Freezing on the Rheological, Solubility, and Electrophoretic Pattern of Wheat Flour Proteins. J Food Sci 2002. [DOI: 10.1111/j.1365-2621.2002.tb08766.x] [Citation(s) in RCA: 10] [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] [Indexed: 11/29/2022]
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Abstract
The enzyme rhodanese (thiosulfate/cyanide sulfurtransferase) is an ubiquitous enzyme and its activity is present in all living organisms from bacteria to man. Evidence has been accumulated to indicate that this enzyme plays a central role in cyanide detoxification. A comparison was made of rhodanese activity in different tissues of young male and adult male and female pig (Sus scrofa). The highest activity of rhodanese was in liver and kidney cortex of all animals. Among the remaining tissues examined, the kidney medulla and the stomach epithelium tended to have higher levels than other tissues, although this was not significant (P>0.05). The rhodanese activity of heart ventricle tissue of 6-month-old male animals was higher than 7-week-old male animals (P<0.05), and 6-month-old male animals had higher rhodanese activity in lung tissue, compared to 6-month-old female pigs (P<0.05). Medulla and spleen of younger male animals exhibited higher levels of activity (P<0.10) compared to older male pigs. The results of this study may indicate the involvement of rhodanese in cyanide detoxification in pig tissues, which have greater potential to be exposed to higher levels of cyanide.
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Affiliation(s)
- Mahmoud Aminlari
- Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Shiraz 71345, Iran
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Aminlari M, Gholami S, Vaseghi T, Azadi A, Karimi H. Distribution of rhodanese in different parts of the urogenital systems of sheep at pre- and post-natal stages. Comp Biochem Physiol B Biochem Mol Biol 2000; 127:369-74. [PMID: 11126767 DOI: 10.1016/s0305-0491(00)00275-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [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: 11/20/2022]
Abstract
The enzyme rhodanese (thiosulfate:cyanide sulfurtransferase) is a ubiquitous enzyme present in all living organisms, from bacteria to humans and plays a central role in cyanide detoxification. The purpose of this investigation is to determine and compare rhodanese activity in different parts of urogenital systems of male and female sheep fetuses at 2.5, 3, 3.5, 4, 4.5, and 5 months of age. The highest activity of rhodanese in male fetus was in kidney cortex, followed by medulla of the kidney. No significant difference was observed in other organs. In female fetus, the highest activity was in kidney cortex followed by oviduct and medulla of kidney. The enzyme activity of tissues increased with age. There was no significant difference (P > 0.05) between male and female fetuses in levels of rhodanese activity of different tissues except in urinary bladder at 2.5 and 3 months and in urethra at 4.5 months of age. The results of this study might indicate the involvement of rhodanese in cyanide detoxification in tissues which are more exposed to cyanide. On the other hand, rhodanese might perform other functions which are specific in these tissues.
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Affiliation(s)
- M Aminlari
- Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Iran.
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Aminlari M, Gholami S, Parhizgari G. Effect of developmental stage on the optic lens protens of animals. Pathophysiology 1998. [DOI: 10.1016/s0928-4680(98)81235-2] [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: 11/27/2022] Open
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Aminlari M, Gholami S, Vaseghi T, Azarafrooz A. Rhodanese (thiosulfate: cyanide sulfurtransferase) in the digestive tract of chicken at different stages of development. Poult Sci 1997; 76:318-20. [PMID: 9057213 DOI: 10.1093/ps/76.2.318] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [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: 02/03/2023] Open
Abstract
This study was undertaken to investigate the relationships between stage of embryonic development and early posthatch growth and the level of rhodanese (thiosulfate:cyanide sulfurtransferase) activity in different regions of the digestive tract and liver of chickens. The embryos were studied at 14, 17, and 20 d and chickens were 1, 2, and 3 wk old. All tissues studied contained rhodanese. The highest specific activity of rhodanese was present in the liver followed by the proventriculus (P < 0.05). The lowest level was in the esophagus. The level of rhodanese was found to increase with age in the proventriculus and duodenum. The highest rhodanese activity in 3-wk-old chickens was in the proventriculus followed by the liver. These results are discussed in terms of the role of different sections of the digestive tract of the chicken in cyanide metabolism.
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Affiliation(s)
- M Aminlari
- Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Iran
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Haghighat M, Moetamed A, Vaseghi T, Aminlari M. Isoprenaline induces biosynthesis of proline-rich proteins in the salivary glands of rat but not in sheep. Comp Biochem Physiol C Pharmacol Toxicol Endocrinol 1996; 115:165-8. [PMID: 9568364 DOI: 10.1016/s0742-8413(96)00119-3] [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] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Long-term treatment of rats with isoprenaline resulted in induction of proline-rich proteins (PRPs) in the salivary glands, which were subsequently purified by TCA solubility and column chromatography. When rats were removed from beta-agonist regimen, then these proteins were no longer observed. Treatment of sheep with isoprenaline did not reveal the induction of PRPs.
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Affiliation(s)
- M Haghighat
- Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Iran
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Abstract
In this study the level of rhodanese (thiosulfate:cyanide sulfurtransferase) activity in different regions of the digestive tract of chicken was determined and compared with that in the liver, heart, kidney, and lung. All tissues studied contained rhodanese. The highest specific activity of rhodanese was in the submucosal layer of proventriculus, followed by liver, heart, the mucosal layer of cecum, rectum, and kidney. The lowest level was present in lung. These results suggest that in the chicken part of the ingested cyanide is detoxified in the digestive tract, mainly by the proventriculus, and part of the absorbed cyanide is metabolized by hepatic rhodanese.
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Affiliation(s)
- M Aminlari
- Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
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Aminlari M, Vaseghi T, Sajedianfard MJ, Samsami M. Changes in arginase, aminotransferases and rhodanese in sera of domestic animals with experimentally induced liver necrosis. J Comp Pathol 1994; 110:1-9. [PMID: 8040368 DOI: 10.1016/s0021-9975(08)80265-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [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]
Abstract
Changes in the serum concentrations of aspartic aminotransferase (AST), alanine aminotransferase (ALT), rhodanese and arginase were measured in dogs, sheep and cattle with hepatic necrosis induced by the oral administration of carbon tetrachloride. A new method for arginase assay was based on the determination of remaining arginine (after its conversion to urea and ornithine) by its reaction with p-nitrophenyl glyoxal (PNPG). In all species studied the serum arginase increased 6-12 h after liver damage, reached a peak value in 48 h and returned to normal thereafter. Rhodanese activity did not change in dogs but rose significantly in sheep and, to a lesser extent, in cattle. AST increased strikingly in sheep as compared with dogs and cattle and remained high for > 5 days. In dogs ALT rose sharply and remained elevated for > 10 days. No change in ALT was seen in sheep or cattle. The determination of arginase by a simple procedure such as the PNPG method, in conjunction with AST or ALT assay, may be of value in assessing the stage of liver necrosis.
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Affiliation(s)
- M Aminlari
- Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Iran
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Aminlari M, Vaseghi T, Kargar MA. The cyanide-metabolizing enzyme rhodanese in different parts of the respiratory systems of sheep and dog. Toxicol Appl Pharmacol 1994; 124:67-71. [PMID: 8291063 DOI: 10.1006/taap.1994.1009] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [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: 01/29/2023]
Abstract
Studies on the rhodanese activity of respiratory systems of sheep and dog showed that a significant difference exists in the pattern of distribution of this enzyme in different parts of the respiratory system of both species. In sheep, larynx, trachea, bronchiole, and lung contain higher activity than nasal cavity and pharynx. In dog, significantly greater rhodanese activity was found in nasal cavity than in other parts of the respiratory system. In regions with high rhodanese activity the enzyme was more concentrated in the mucosa than in the underneath tissues. These results are discussed in terms of the possible role of rhodanese in cyanide metabolism in respiratory tract and the efficacy of this organ in inhaled cyanide detoxification in these species of animals.
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Affiliation(s)
- M Aminlari
- Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Iran
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Abstract
Arginase catalyzes the conversion of arginine to urea and ornithine in the liver of ureotelic animals. Higher activity of this enzyme is found in tumors as well as in the sera of patients with hepatic diseases. We have developed a simple colorimetric method for its determination. This is based on the determination of residual arginine, after its conversion with p-nitrophenyl glyoxal (PNPG) at pH 9.0 in the presence of sodium ascorbate. The reaction product obeys Beer's law in the range of 0.01-0.20 mmol/L arginine with an arginine-equivalent molar extinction coefficient of 0.65 x 10(4) M-1 cm-1. The decrease in absorbance in the presence of arginase correlates with the enzyme activity. Color development as well as termination of enzyme activity is achieved by addition of a single reagent, thereby obviating the use of many chemicals necessary in other methods. The sensitivity of this method is equivalent to those of currently available procedures but has the added advantages of greater convenience.
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Affiliation(s)
- M Aminlari
- Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Iran
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