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Ou C, Cheng W, Wang Z, Yao X, Yang S. Exogenous melatonin enhances Cd stress tolerance in Platycladus orientalis seedlings by improving mineral nutrient uptake and oxidative stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 252:114619. [PMID: 36753967 DOI: 10.1016/j.ecoenv.2023.114619] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 01/16/2023] [Accepted: 02/05/2023] [Indexed: 05/26/2023]
Abstract
The development of agriculture and industry has led to a gradual increase in the levels of cadmium (Cd) in the soil, which, due to its high mobility in soil, makes Cd deposition in plants a serious threat to the health of animals and humans. The important role of melatonin (MT) in regulating plant growth and adaptation to environmental stress has become a pertinent research topic, but the mechanisms of action of MT in Cd-stressed Platycladus orientalis seedlings are unclear. Here, we investigated the mitigation mechanism of exogenous MT application on P. orientalis seedlings under Cd stress. Cd stress significantly inhibited the growth of P. orientalis seedlings by disrupting photosynthetic pigments, mineral balance, osmotic balance, and oxidative balance. In contrast, the application of exogenous MT significantly increased the growth parameters of P. orientalis seedlings, reduced Cd accumulation and transfer in the seedlings, increased the content of iron, manganese, zinc, copper, chlorophyll, soluble protein, soluble sugar, and proline, reduced the content of glutathione, increased the activities of superoxide dismutase and peroxidase, and significantly enhanced the expression of antioxidant-related genes (POD, GST, and APX). It also effectively reduced the content of hydrogen peroxide and malondialdehyde to inhibit the production of reactive oxygen species, thus alleviating Cd-induced oxidative stress. In addition, MT significantly upregulated the expression of the ethanol dehydrogenase (ADH) gene, which is effective in removing the acetaldehyde produced by anaerobic respiration in seedlings under stress, thereby reducing the toxic effects on P. orientalis. The results showed that exogenous MT enhanced the tolerance of P. orientalis seedlings to Cd stress by regulating photosynthesis, mineral balance, osmotic balance, and the antioxidant system and that the optimal concentration of MT was 200 μmol·L-1.
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Affiliation(s)
- Chun Ou
- Engineering Technology Research Center of Anti-aging Chinese Herbal Medicine, School of Biology and Food Engineering, Fuyang Normal University, Fuyang, Anhui 236037, China
| | - Wenhui Cheng
- Engineering Technology Research Center of Anti-aging Chinese Herbal Medicine, School of Biology and Food Engineering, Fuyang Normal University, Fuyang, Anhui 236037, China
| | - Zelu Wang
- Engineering Technology Research Center of Anti-aging Chinese Herbal Medicine, School of Biology and Food Engineering, Fuyang Normal University, Fuyang, Anhui 236037, China
| | - Xiamei Yao
- School of Architecture and Urban Planning, Anhui Jianzhu University, Hefei, Anhui 230601, China.
| | - Shengmei Yang
- Engineering Technology Research Center of Anti-aging Chinese Herbal Medicine, School of Biology and Food Engineering, Fuyang Normal University, Fuyang, Anhui 236037, China
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Karmous I, Taheur FB, Zuverza-Mena N, Jebahi S, Vaidya S, Tlahig S, Mhadhbi M, Gorai M, Raouafi A, Debara M, Bouhamda T, Dimkpa CO. Phytosynthesis of Zinc Oxide Nanoparticles Using Ceratonia siliqua L. and Evidence of Antimicrobial Activity. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11223079. [PMID: 36432809 PMCID: PMC9695060 DOI: 10.3390/plants11223079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 10/20/2022] [Accepted: 10/31/2022] [Indexed: 06/01/2023]
Abstract
Carob (Ceratonia siliqua L.) is a tree crop cultivated extensively in the eastern Mediterranean regions but that has become naturalized in other regions as well. The present study focused on the green synthesis of zinc oxide nanoparticles (ZnONPs) from Carob and their evaluation for antimicrobial activity in bacteria and fungi. The synthesized ZnONPs showed strong antibacterial activity against Staphylococcus aureus ATCC 25 923 (92%). The NPs inhibited the growth of pathogenic yeast strains, including Candida albicans ATCC90028, Candida krusei ATCC6258, and Candida neoformans ATCC14116, by 90%, 91%, and 82%, respectively, compared to the control. Fungal inhibition zones with the ZnONPs were 88.67% and 90%, respectively, larger for Aspergillus flavus 15UA005 and Aspergillus fumigatus ATCC204305, compared to control fungal growth. This study provides novel information relevant for plant-based development of new and potentially antimicrobial ZnONPs based on extracts. In particular, the development and application of phytogenic nanoparticles enhances the biocompatibility of nano-scale materials, thereby allowing to tune effects to prevent adverse outcomes in non-target biological systems.
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Affiliation(s)
- Inès Karmous
- Institute of Applied Biology of Medenine, University of Gabes, Medenine 4100, Tunisia
- Plant Toxicology and Molecular Biology of Microorganisms, Faculty of Sciences of Bizerte, Jarzouna 7021, Tunisia
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington, New Haven, CT 06511, USA
| | - Fadia Ben Taheur
- Laboratory of Analysis, Treatment and Valorization of Environmental Pollutants and Products, Faculty of Pharmacy, University of Monastir, Street Ibn Sina, Monastir 5000, Tunisia
| | - Nubia Zuverza-Mena
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington, New Haven, CT 06511, USA
| | - Samira Jebahi
- Institute of Applied Biology of Medenine, University of Gabes, Medenine 4100, Tunisia
- Laboratory of Useful Materials, National Institute of Research and Physicochemical Analysis, Technopole Sidi Thabet, Ariana 2020, Tunisia
| | - Shital Vaidya
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington, New Haven, CT 06511, USA
| | - Samir Tlahig
- Institute of Applied Biology of Medenine, University of Gabes, Medenine 4100, Tunisia
- Arid Region Institute, Medenine 4100, Tunisia
| | - Mohsen Mhadhbi
- Laboratory of Useful Materials, National Institute of Research and Physicochemical Analysis, Technopole Sidi Thabet, Ariana 2020, Tunisia
| | - Mustapha Gorai
- Institute of Applied Biology of Medenine, University of Gabes, Medenine 4100, Tunisia
| | - Amel Raouafi
- National Center for Nuclear Science and Technology, Technopole Sidi Thabet, Ariana 2020, Tunisia
| | | | | | - Christian O. Dimkpa
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington, New Haven, CT 06511, USA
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3
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Karmous I, Tlahig S, Loumerem M, Lachiheb B, Bouhamda T, Mabrouk M, Debouba M, Chaoui A. Assessment of the risks of copper- and zinc oxide-based nanoparticles used in Vigna radiata L. culture on food quality, human nutrition and health. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2022; 44:4045-4061. [PMID: 34850307 DOI: 10.1007/s10653-021-01162-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 11/12/2021] [Indexed: 06/13/2023]
Abstract
The present article aims to assess the phytotoxic effects of copper and zinc oxide nanoparticles (Cu NPs, ZnO NPs) on mung bean (Vigna radiata L.) and their possible risk on food quality and safety. We also study the molecular mechanisms underlying the toxicity of nanosized Cu and ZnO. Seeds of mung bean were germinated under increasing concentrations of Cu NPs and ZnO NPs (10, 100, 1000, 2000 mg/L). We analyzed levels of free amino acids, total soluble sugars, minerals, polyphenols and antioxidant capacity. Our results showed that depending on the concentrations used of Cu NPs and ZnO NPs, the physiology of seed germination and embryo growth were modified. Both free metal ions and nanoparticles themselves may impact plant cellular and physiological processes. At 10 mg/L, an improvement of the nutritive properties, in terms of content in free amino acids, total soluble sugars, essential minerals, antioxidant polyphenols and flavonoids, was shown. However, higher concentrations (100-2000 mg/L) caused an alteration in the nutritional balance, which was revealed by the decrease in contents and quality of phenolic compounds, macronutrients (Na, Mg, Ca) and micronutrients (Cu, Fe, Mn, Zn, K). The overall effects of Cu and ZnO nanoparticles seem to interfere with the bioavailability of mineral and organic nutrients and alter the beneficial properties of the antioxidant phytochemicals, mineral compounds, phenolic acids and flavonoids. This may result in a potential hazard to human food and health, at some critical doses of nanofertilizers. This study may contribute in the guidelines to the safe use of nanofertilizers or nanosafety, for more health benefit and less potential risks.
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Affiliation(s)
- Inès Karmous
- Plant Toxicology and Molecular Biology of Microorganisms, Faculty of Sciences of Bizerta, Zarzouna, Tunisia.
- Biology and Environmental Department, Insitute of Applied Biology of Medenine (ISBAM), University of Gabes, Medenine, Tunisia.
| | - Samir Tlahig
- Biology and Environmental Department, Insitute of Applied Biology of Medenine (ISBAM), University of Gabes, Medenine, Tunisia
- Dry Land and Oases Cropping Laboratory, Arid Land Institute of Medenine (IRA), Medenine, Tunisia
| | - Mohamed Loumerem
- Dry Land and Oases Cropping Laboratory, Arid Land Institute of Medenine (IRA), Medenine, Tunisia
| | - Belgacem Lachiheb
- Dry Land and Oases Cropping Laboratory, Arid Land Institute of Medenine (IRA), Medenine, Tunisia
| | - Talel Bouhamda
- Dry Land and Oases Cropping Laboratory, Arid Land Institute of Medenine (IRA), Medenine, Tunisia
| | - Mahmoud Mabrouk
- Dry Land and Oases Cropping Laboratory, Arid Land Institute of Medenine (IRA), Medenine, Tunisia
| | - Mohamed Debouba
- Biology and Environmental Department, Insitute of Applied Biology of Medenine (ISBAM), University of Gabes, Medenine, Tunisia
| | - Abdelilah Chaoui
- Plant Toxicology and Molecular Biology of Microorganisms, Faculty of Sciences of Bizerta, Zarzouna, Tunisia
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Qian X, Nie L, Dai Z, Ma S. Determination of Free Amino Acids in Banlangen Granule and its Fractions by Solid Phase Extraction Combined with Ion-pair Hig-h Perfor mance Liquid Chromatography using a Corona-charged Aerosol Detector (SPE-HPLC-CAD). CURR PHARM ANAL 2021. [DOI: 10.2174/1573412916999200526120449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Banlangen granules are broad-spectrum effective antiviral drugs, and have a
large clinical demand in China. Free amino acid is one of the main antiviral active ingredients of Banlangen
granules. The pre-processing of samples by the existing pre-column derivatization reversed-
HPLC method is complicated. Therefore, the determination of free amino acids (AAs) by underivatized
ion-pair HPLC-CAD is advantageous for simplifying the preparation process and improving sensitivity.
Objective:
To better optimize AAs analysis methods, here a sensitive SPE-HPLC-CAD method with a
better resolution was established for the determination of underivatized AAs in Banlangen Granule for
the first time.
Method:
The analytes were separated only by HPLC using a Hypercarb column with gradient elution of solvent A (20
mM nonafluorovaleric Acid in water) and solvent B (0.3% trifluoroacetic acid in acetonitrile-0.3% trifluoroacetic acid
in water (1:9, v/v)) at a flow rate of 0.15 mL/min. N2 gas pressure and evaporation temperature of CAD were held at a
constant 58.6 psi and 60 ℃, respectively.
Results:
This method was linear over the respective concentration range of six amino acids. The precision, accuracy,
stability and recovery were satisfactory in all samples examined. And the method was successfully applied to
determination of free amino acids in Banlangen granules and its fractions. The total contents of six amino acids in 28
batches of Banlangen Granule were between 1.36 mg/g-11.62 mg/g.
Conclusion:
The proposed method could be a simple, accurate and sensitive alternative approach for the determination
of free AAs in Banlangen Granule.
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Affiliation(s)
- Xiuyu Qian
- Institute of Traditional Chinese Medicine, National Institutes for Food and Drug Control, Beijing 100050,China
| | - Lixing Nie
- Institute of Traditional Chinese Medicine, National Institutes for Food and Drug Control, Beijing 100050,China
| | - Zhong Dai
- Institute of Traditional Chinese Medicine, National Institutes for Food and Drug Control, Beijing 100050,China
| | - Shuangcheng Ma
- Institute of Traditional Chinese Medicine, National Institutes for Food and Drug Control, Beijing 100050,China
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5
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Tlahig S, Bellani L, Karmous I, Barbieri F, Loumerem M, Muccifora S. Response to Salinity in Legume Species: An Insight on the Effects of Salt Stress during Seed Germination and Seedling Growth. Chem Biodivers 2021; 18:e2000917. [PMID: 33586309 DOI: 10.1002/cbdv.202000917] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 02/11/2021] [Indexed: 12/21/2022]
Abstract
The process of soil salinization and the preponderance of saline water sources all over the world represent one of the most harmful abiotic stress to plant growth. This pointed to the importance of obtaining plants which are tolerant or resistant to salt, considering that projection of climate change for the coming years indicate an increase in temperature and rain scarcity. In the current study, the effect of NaCl was investigated on germinating seeds of Lathyrus sativus L., Vicia sativa L., Vigna radiata L. R.Wilczek and Vigna unguiculata L. Walp., by combining physiological, biochemical, biostatistical and ultrastructural analyses. Our results revealed that germination was not influenced by high NaCl concentrations, while seedling growth was affected even at low NaCl concentrations, probably due to an alteration in water uptake and in organic matter biosynthesis. Nevertheless, the synthesis of antioxidant enzymes, phenolic acids and flavonoids was registered in all species, which tended to cope with the increasing salt stress, allowing a response mechanism such as cytoplasm detoxification and cellular turgor maintenance. Besides, the ultrastructural analysis evidenced plasmolyzed cells close to cells with a normal ultrastructure with no appreciable differences among the species. This research deeply investigates the mechanism of salt-stress response focusing on species never tested before for their possible tolerance to salinity.
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Affiliation(s)
- Samir Tlahig
- Dry Land Farming and Oases Cropping Laboratory, Arid Land Institute of Medenine (IRA), Road El Jorf KM 22.5, 4119, Medenine, Tunisia.,Biology and Environmental Department, Institute of Applied Biology of Medenine (ISBAM), Road El Jorf KM 22.5, 4119, Medenine, Tunisia
| | - Lorenza Bellani
- Department of Life Sciences, University of Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Inès Karmous
- Biology and Environmental Department, Institute of Applied Biology of Medenine (ISBAM), Road El Jorf KM 22.5, 4119, Medenine, Tunisia.,Plant Toxicology and Molecular Biology of Microorganisms, Faculty of Sciences of Bizerta, 7021, Zarzouna, Tunisia
| | - Francesco Barbieri
- Department of Life Sciences, University of Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Mohamed Loumerem
- Dry Land Farming and Oases Cropping Laboratory, Arid Land Institute of Medenine (IRA), Road El Jorf KM 22.5, 4119, Medenine, Tunisia
| | - Simonetta Muccifora
- Department of Life Sciences, University of Siena, Via A. Moro 2, 53100, Siena, Italy
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6
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Bergen WG. Amino Acids in Beef Cattle Nutrition and Production. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1285:29-42. [PMID: 33770401 DOI: 10.1007/978-3-030-54462-1_3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Proteins have been recognized for a long time as an important dietary nutritional component for all animals. Most amino acids were isolated and characterized in the late nineteenth and early twentieth century. Initially dietary proteins were ranked high to low quality by growth and N balance studies. By the 1950s interest had shifted to studying the roles of individual amino acids in amino acid requirements by feeding studies with non-ruminants as rodents, poultry and pigs. The direct protein feeding approaches followed by measurements of nutritional outcomes were not possible however in ruminants (cattle and sheep). The development of measuring free amino acids by ion exchange chromatography enabled plasma amino acid analysis. It was thought that plasma amino acid profiles were useful in nutritional studies on proteins and amino acids. With non-ruminants, nutritional interpretations of plasma amino acid studies were possible. Unfortunately with beef cattle, protein/amino acid nutritional adequacy or requirements could not be routinely determined with plasma amino acid studies. In dairy cows, however, much valuable understanding was gained from amino acid studies. Concurrently, others studied amino acid transport in ruminant small intestines, the role of peptides in ruminant N metabolism, amino acid catabolism (in the animal) with emphasis on branched-chain amino acid catabolism. In addition, workable methodologies for studying protein turnover in ruminants were developed. By the 1990s, nutritionists could still not determine amino acid requirements with empirical experimental studies in beef cattle. Instead, computer software (expert systems) based on the accumulated knowledge in animal and ruminal amino acids, energy metabolism and protein production were realized and revised frequently. With these tools, the amino acid requirements, daily energy needs, ruminal and total gastrointestinal tract digestion and performance of growing beef cattle could be predicted.
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Affiliation(s)
- Werner G Bergen
- Department of Animal Sciences, Auburn University, Auburn, AL, USA.
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7
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Affiliation(s)
- Margaret Jones
- Research Laboratory, Arthur Guinness Son & Co. (Park Royal) Ltd., London N.W. 10, England
| | - J. B. Woof
- Research Laboratory, Arthur Guinness Son & Co. (Park Royal) Ltd., London N.W. 10, England
| | - John S. Pierce
- Research Laboratory, Arthur Guinness Son & Co. (Park Royal) Ltd., London N.W. 10, England
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8
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Zhao F, Wu T, Wang H, Ding L, Ahmed G, Li H, Tian W, Shen Y. Jugular arginine infusion relieves lipopolysaccharide-triggered inflammatory stress and improves immunity status of lactating dairy cows. J Dairy Sci 2018; 101:5961-5970. [DOI: 10.3168/jds.2017-13850] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 02/24/2018] [Indexed: 01/08/2023]
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9
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Gar C, Rottenkolber M, Prehn C, Adamski J, Seissler J, Lechner A. Serum and plasma amino acids as markers of prediabetes, insulin resistance, and incident diabetes. Crit Rev Clin Lab Sci 2017; 55:21-32. [PMID: 29239245 DOI: 10.1080/10408363.2017.1414143] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Presently, routine screening misses many cases of prediabetes and early type 2 diabetes (T2D). Therefore, better biomarkers are needed for a simple and early detection of abnormalities of glucose metabolism and prediction of future T2D. Possible candidates for this include plasma or serum amino acids because glucose and amino acid metabolism are closely connected. This review presents the available evidence of this connectivity and discusses its clinical implications. First, we examine the underlying physiological, pre-analytical, and analytical issues. Then, we summarize results of human studies that evaluate amino acid levels as markers for insulin resistance, prediabetes, and future incident T2D. Finally, we illustrate the interconnection of amino acid levels and metabolic syndrome with our own data from a deeply phenotyped human cohort. We also discuss how amino acids may contribute to the pathophysiology of T2D. We conclude that elevated branched-chain amino acids and reduced glycine are currently the most robust and consistent amino acid markers for prediabetes, insulin resistance, and future T2D. Yet, we are cautious regarding the clinical potential even of these parameters because their discriminatory power is insufficient and their levels depend not only on glycemia, but also on other components of the metabolic syndrome. The identification of more precise intermediates of amino acid metabolism or combinations with other biomarkers will, therefore, be necessary to obtain in order to develop laboratory tests that can improve T2D screening.
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Affiliation(s)
- C Gar
- a Diabetes Research Group , Medizinische Klinik und Poliklinik IV, Klinikum der Universität München , Munich , Germany.,b Clinical Cooperation Group Type 2 Diabetes , Helmholtz Zentrum München , Neuherberg , Germany.,c Deutsches Zentrum für Diabetesforschung (DZD) , Neuherberg , Germany
| | - M Rottenkolber
- a Diabetes Research Group , Medizinische Klinik und Poliklinik IV, Klinikum der Universität München , Munich , Germany.,b Clinical Cooperation Group Type 2 Diabetes , Helmholtz Zentrum München , Neuherberg , Germany.,c Deutsches Zentrum für Diabetesforschung (DZD) , Neuherberg , Germany
| | - C Prehn
- d Institute of Experimental Genetics, Genome Analysis Center , Helmholtz Zentrum München, German Research Center for Environmental Health , Neuherberg , Germany
| | - J Adamski
- c Deutsches Zentrum für Diabetesforschung (DZD) , Neuherberg , Germany.,d Institute of Experimental Genetics, Genome Analysis Center , Helmholtz Zentrum München, German Research Center for Environmental Health , Neuherberg , Germany.,e Lehrstuhl fu¨r Experimentelle Genetik , Technische Universität München , Freising , Germany
| | - J Seissler
- a Diabetes Research Group , Medizinische Klinik und Poliklinik IV, Klinikum der Universität München , Munich , Germany.,b Clinical Cooperation Group Type 2 Diabetes , Helmholtz Zentrum München , Neuherberg , Germany.,c Deutsches Zentrum für Diabetesforschung (DZD) , Neuherberg , Germany
| | - A Lechner
- a Diabetes Research Group , Medizinische Klinik und Poliklinik IV, Klinikum der Universität München , Munich , Germany.,b Clinical Cooperation Group Type 2 Diabetes , Helmholtz Zentrum München , Neuherberg , Germany.,c Deutsches Zentrum für Diabetesforschung (DZD) , Neuherberg , Germany
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10
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García-Jiménez A, Gómez-Merino FC, Tejeda-Sartorius O, Trejo-Téllez LI. Lanthanum Affects Bell Pepper Seedling Quality Depending on the Genotype and Time of Exposure by Differentially Modifying Plant Height, Stem Diameter and Concentrations of Chlorophylls, Sugars, Amino Acids, and Proteins. FRONTIERS IN PLANT SCIENCE 2017; 8:308. [PMID: 28344584 PMCID: PMC5344905 DOI: 10.3389/fpls.2017.00308] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 02/20/2017] [Indexed: 05/21/2023]
Abstract
Lanthanum (La) is considered a beneficial element, capable of inducing hormesis. Hormesis is a dose-response relationship phenomenon characterized by low-dose stimulation and high-dose inhibition. Herein we tested the effect of 0 and 10 μM La on growth and biomolecule concentrations of seedlings of four sweet bell pepper (Capsicum annuum L.) varieties, namely Sven, Sympathy, Yolo Wonder, and Zidenka. Seedling evaluations were performed 15 and 30 days after treatment applications (dat) under hydroponic greenhouse conditions. Seedling height was significantly increased by La, growing 20% taller in Yolo Wonder plants, in comparison to the control. Similarly, La significantly enhanced shoot diameter, with increases of 9 and 9.8% in measurements performed 15 and 30 dat, respectively, as compared to the control. Likewise, La-treated seedlings had a higher number of flower buds than the control. An increase in the number of leaves because of La application was observed in Yolo Wonder seedlings, both 15 and 30 dat, while leaf area was augmented in this variety only 30 dat. Nevertheless, La did not affect dry biomass accumulation. La effects on biomolecule concentration were differential over time. In all varieties, La stimulated the biosynthesis of chlorophyll a, b and total 15 dat, though 30 dat only the varieties Sympathy and Yolo Wonder showed enhanced concentrations of these molecules because of La. Total soluble sugars increased in La-treated seedlings 30 dat. Interestingly, while most varieties exposed to La showed a reduction in amino acid concentration 15 dat, the opposite trend was observed 30 dat. Importantly, in all varieties evaluated, La stimulated soluble protein concentration 30 dat. It is important to note that while chlorophyll concentrations increased in all varieties exposed to La, both 15 and 30 dat, those of soluble sugars and proteins consistently increased only 30 dat, but not 15 dat. Our results confirm that La may improve seedling quality by enhancing some growth parameters and biomolecule concentrations, depending on the genotype, and time of exposure.
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Affiliation(s)
| | | | - Olga Tejeda-Sartorius
- Laboratory of Plant Nutrition, Soil Science, Colegio de Postgraduados Campus MontecilloMontecillo, Mexico
| | - Libia I. Trejo-Téllez
- Laboratory of Plant Nutrition, Soil Science, Colegio de Postgraduados Campus MontecilloMontecillo, Mexico
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12
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Jain R, Jain A, Rawat N, Nair M, Gumashta R. Feather hydrolysate from Streptomyces sampsonii GS 1322: A potential low cost soil amendment. J Biosci Bioeng 2016; 121:672-677. [PMID: 26906933 DOI: 10.1016/j.jbiosc.2015.11.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 09/30/2015] [Accepted: 11/10/2015] [Indexed: 10/22/2022]
Abstract
Process parameters for obtaining hydrolysate from hen feathers, i.e., initial pH (5.0-9.0) and incubation period (1-6 day), were set and studied, using Streptomyces sampsonii GS 1322 in submerged and solid state conditions. Under submerged conditions, complete hydrolysis of feathers was observed on fifth day [initial pH 8.0, 28 ± 2°C, shaking (150 rpm)] with release of soluble protein (2985 μg ml(-1)) and amino acids (2407 μg ml(-1)). Cell free hydrolysate showed hydrolysis of casein (18 mm), gelatin (26 mm), collagen (31 mm), hemoglobin (23 mm) and Tween 80 (35 mm) while 445 U keratinase activity. Total soluble protein reached 5 mg ml(-1) in solid state conditions. During Pot experimentation using barren agriculture soil the effect of feather hydrolysate on wheat crop were recorded. Significant increase (p<0.01) in wheat seed germination was observed in treated soils as compared to untreated. Treatment significantly increased plant height from 30 to 60 days and 30-90 days (p<0.001). Treated soil showed an increase in total microbial count, proteolytic activity, phosphate solubilizing bacteria and ammonifying bacteria, whereas pathogenic fungi load was reduced. S. sampsonii GS 1322 can be used for bio-processing of poultry wastes yielding feather hydrolysate rich in proteins and amino acids for development of low-cost organic amendment to accelerate wheat crop growth in barren agricultural land.
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Affiliation(s)
- Richa Jain
- Molecular Biotechnology Laboratory, C.S.R.D., People's University, Bhopal, M.P., 462037, India.
| | - Aakanchha Jain
- Department of Pharmaceutical Sciences, Dr. Hari Singh Gour University, Sagar, M.P., India
| | - Neha Rawat
- Molecular Biotechnology Laboratory, C.S.R.D., People's University, Bhopal, M.P., 462037, India
| | - Meera Nair
- Stem Cell Technology Laboratory, C.S.R.D., People's University, Bhopal, M.P., 462037, India
| | - Raghvendra Gumashta
- Department of Community Medicine, P.C.M.S. & R.C., People's University, Bhopal, M.P., 462037, India
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13
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Park S, Sadanala KC, Kim EK. A Metabolomic Approach to Understanding the Metabolic Link between Obesity and Diabetes. Mol Cells 2015; 38:587-96. [PMID: 26072981 PMCID: PMC4507023 DOI: 10.14348/molcells.2015.0126] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 05/22/2015] [Accepted: 05/26/2015] [Indexed: 12/19/2022] Open
Abstract
Obesity and diabetes arise from an intricate interplay between both genetic and environmental factors. It is well recognized that obesity plays an important role in the development of insulin resistance and diabetes. Yet, the exact mechanism of the connection between obesity and diabetes is still not completely understood. Metabolomics is an analytical approach that aims to detect and quantify small metabolites. Recently, there has been an increased interest in the application of metabolomics to the identification of disease biomarkers, with a number of well-known biomarkers identified. Metabolomics is a potent approach to unravel the intricate relationships between metabolism, obesity and progression to diabetes and, at the same time, has potential as a clinical tool for risk evaluation and monitoring of disease. Moreover, metabolomics applications have revealed alterations in the levels of metabolites related to obesity-associated diabetes. This review focuses on the part that metabolomics has played in elucidating the roles of metabolites in the regulation of systemic metabolism relevant to obesity and diabetes. It also explains the possible metabolic relation and association between the two diseases. The metabolites with altered profiles in individual disorders and those that are specifically and similarly altered in both disorders are classified, categorized and summarized.
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Affiliation(s)
- Seokjae Park
- Department of Brain & Cognitive Sciences, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-873,
Korea
- Neurometabolomics Research Center, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-873,
Korea
| | - Krishna Chaitanya Sadanala
- Neurometabolomics Research Center, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-873,
Korea
| | - Eun-Kyoung Kim
- Department of Brain & Cognitive Sciences, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-873,
Korea
- Neurometabolomics Research Center, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-873,
Korea
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14
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Post-column labeling techniques in amino acid analysis by liquid chromatography. Anal Bioanal Chem 2013; 405:7957-92. [DOI: 10.1007/s00216-013-7127-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2013] [Revised: 06/04/2013] [Accepted: 06/06/2013] [Indexed: 10/26/2022]
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15
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Nitrogen dynamics in arctic tundra soils of varying age: differential responses to fertilization and warming. Oecologia 2013; 173:1575-86. [DOI: 10.1007/s00442-013-2733-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Accepted: 07/05/2013] [Indexed: 10/26/2022]
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16
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Prandini A, Sigolo S, Morlacchini M, Grilli E, Fiorentini L. Microencapsulated lysine and low-protein diets: effects on performance, carcass characteristics and nitrogen excretion in heavy growing-finishing pigs. J Anim Sci 2013; 91:4226-34. [PMID: 23893996 DOI: 10.2527/jas.2013-6412] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Two studies were conducted to assess the effects of dietary protein and Lys reduction on growth performance, carcass quality, N excretion, and plasma N profile in growing-finishing pigs from 35 to 180 kg. The growing trial was conducted with 72 gilts and 72 barrows with 6 pens per treatment and 6 gilts or 6 barrows per pen. Four diets with the same DE and NE were compared: 1) control diet, 2) diet with protein content reduced by 3% units compared with the control diet and supplemented with Lys HCl to match the requirements according to the 2012 NRC (FLys), 3) diet similar to FLys for protein level but supplemented with only 50% of the Lys HCl provided with FLys (-50% FLys), and 4) diet similar to FLys and -50% Flys for protein level with microencapsulated Lys added to supply 20% of the Lys provided by FLys (-80% MLys). Pigs fed the FLys diet performed in a similar manner and showed similar carcass characteristics to the control pigs. Pigs fed the -50% FLys diet had the lightest BW (P < 0.01) as well as the lightest carcass (P = 0.02) and trimmed thigh (P = 0.04) weights. Pigs fed the -80% MLys diet showed growth performance and carcass characteristics similar to the control pigs. The N balance study was conducted with 8 barrows arranged in a double replicated 4 × 4 Latin square design. The control pigs had greater (P < 0.01) N intake and urinary and total N excretion compared with pigs fed the low-protein diets. The reduction of the dietary protein concentration by 3% units decreased total N excretion by an average of 24.5% and the greatest reduction of total N excretion was obtained by the -80% MLys diet (26.12%) compared with the control diet throughout the trial. No effect of dietary treatment was observed on the plasma concentrations of ammonia, urea, and total AA in the 80-kg pigs. Decreased plasma ammonia (P < 0.01) and urea (P = 0.03) concentrations were detected in the 120-kg pigs fed the low-protein diets. The 160-kg pigs fed the -80% MLys pigs had less total AA, indispensable AA in particular (P < 0.01), than pigs fed the other diets and decreased ammonia (P < 0.01) and urea (P = 0.05) concentrations than the control pigs. The results showed that the use of microencapsulated Lys, compared with both Lys HCl and dietary protein-bound Lys, can save CP and synthetic AA in diet formulation and can reduce N excretion in manure without adversely affecting the growth performance and carcass quality of heavy growing-finishing pigs.
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Affiliation(s)
- A Prandini
- Feed and Food Science and Nutrition Institute, Agricultural Faculty, Catholic University, 29122 Piacenza, Italy.
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17
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Masuda A, Dohmae N. Examination of an absolute quantity of less than a hundred nanograms of proteins by amino acid analysis. Anal Bioanal Chem 2013; 405:8073-81. [PMID: 23719935 PMCID: PMC3777156 DOI: 10.1007/s00216-013-7056-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 03/14/2013] [Accepted: 05/08/2013] [Indexed: 11/28/2022]
Abstract
We developed an ultra-sensitive method of amino acid analysis (AAA) for the absolute quantification of less than 100 ng of proteins, in solution or on polyvinylidene difluoride (PVDF) membranes using an oxygen-free chamber for protein hydrolysis. We used a pre-label method with 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate for fluorescence detection, ion-pair chromatography with a reversed-phase column, and an ultra-high-pressure high-performance liquid chromatography. We optimized both handling- and instrument-dependent factors for accurate quantification and showed that the least amount of proteins to quantify was determined by handling accuracy rather than instrumental limit for quantification which was 0.6 fmol/amino acid. As a new evaluation method for the handling accuracy, we adopted the protein identification by the obtained amino acid compositions by AAA and the Swiss-Prot database search without the restriction of species. As a result, the least amount of starting material for AAA was 16 ng (0.24 pmol) for a solution of bovine serum albumin (BSA), 33 ng (0.50 pmol) for BSA on a PVDF membrane, and 44 ng (0.15 pmol) for thyroglobulin on a PVDF membrane. These results demonstrate that the ultra-sensitive AAA developed in this study is feasible for absolute quantification of biological significant protein. Specification of ultra-sensitive amino acid analysis ![]()
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Affiliation(s)
- Akiko Masuda
- Biomolecular Characterization Team, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198 Japan
| | - Naoshi Dohmae
- Biomolecular Characterization Team, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198 Japan
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Harris G, Merritt NR. BREWING INDUSTRY RESEARCH FOUNDATION. COMPARISON OF THE COURSE OF FERMENTATION IN A CONTINUOUS AND A BATCH BREWING PROCESS. JOURNAL OF THE INSTITUTE OF BREWING 2013. [DOI: 10.1002/j.2050-0416.1961.tb01827.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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19
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Jones M, Pierce JS. THE FATE OF AMINO ACIDS DURING MASHING AND HOP BOILING. JOURNAL OF THE INSTITUTE OF BREWING 2013. [DOI: 10.1002/j.2050-0416.1967.tb03051.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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20
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Kurosky A, Bars A. QUANTITATIVE GAS CHROMATOGRAPHIC ANALYSIS OF AMINO ACIDS IN BEER AND WORT. JOURNAL OF THE INSTITUTE OF BREWING 2013. [DOI: 10.1002/j.2050-0416.1968.tb03116.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Lamminmaki OA, Pierce JS. ACTIVITIES OF CERTAIN AMINOTRANSFERASES AND NADP-DEPENDENT GLUTAMIC ACID DEHYDROGENASE IN YEAST DURING FERMENTATION. JOURNAL OF THE INSTITUTE OF BREWING 2013. [DOI: 10.1002/j.2050-0416.1969.tb03241.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Bottomley RA, Powell ADG. PRELIMINARY OBSERVATIONS ON THE COMPOSITION OF SOME AUSTRALIAN BOTTLED BEERS. JOURNAL OF THE INSTITUTE OF BREWING 2013. [DOI: 10.1002/j.2050-0416.1958.tb01657.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Gibson RM, Large PJ, Anness BJ, Bamforth CW. THE IDENTITY OF AN INHIBITOR IN WORT OF DIMETHYL SULPHOXIDE REDUCTASE FROM YEAST. JOURNAL OF THE INSTITUTE OF BREWING 2013. [DOI: 10.1002/j.2050-0416.1983.tb04170.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Intestinal development and growth performance of early-weaned piglets fed a low-threonine diet. Animal 2012; 1:1134-42. [PMID: 22444859 DOI: 10.1017/s1751731107000560] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
High dietary threonine extraction by the digestive tract suggests that threonine contributes to maintain gut integrity. The aims of this study were to investigate the intestine development and the growth performance of early-weaned piglets pair-fed either a control well-balanced (C: 9.3 g threonine/kg diet) or a low-threonine diet (LT: 6.5 g threonine/kg diet) for 2 weeks. As expected, LT piglets presented lower plasma free threonine compared with C piglets (118 v. 356 ± 12 μmol/l, P < 0.001). Dietary threonine supply altered neither growth performance nor growth of the intestine and of the other portal-drained viscera (stomach, spleen and pancreas). Nevertheless, villus height was reduced in the ileum of the LT piglets compared with C piglets (446 v. 714 ± 74 μm, P < 0.05). This was also associated with a decrease in crypt width (P < 0.05) and villus height-to-crypt depth ratio (P < 0.05). Whereas maltase and lactase activities did not change between the two groups, aminopeptidase nitrogen activity was decreased in the ileum of LT piglets (269 v. 374 ± 27 IU/mg protein, P < 0.05). The number of mucin-containing goblet cells was not modified in the ileum and in the proximal part of the large intestine of the LT piglets compared with the C piglets. In conclusion, despite no alteration of intestinal growth, villus hypotrophy associated with a reduction of aminopeptidase nitrogen activity suggest an alteration of the structure of the ileum in early-weaned piglets fed a diet supplying inadequate dietary threonine.
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Nyhan W. On being a Doctor… “and describe a disease not previously reported, Lesch–Nyhan disease”. Rev Clin Esp 2012; 212:462-4. [DOI: 10.1016/j.rce.2011.12.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Su Y, Lam TK, He W, Pocai A, Bryan J, Aguilar-Bryan L, Gutiérrez-Juárez R. Hypothalamic leucine metabolism regulates liver glucose production. Diabetes 2012; 61:85-93. [PMID: 22187376 PMCID: PMC3237640 DOI: 10.2337/db11-0857] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Amino acids profoundly affect insulin action and glucose metabolism in mammals. Here, we investigated the role of the mediobasal hypothalamus (MBH), a key center involved in nutrient-dependent metabolic regulation. Specifically, we tested the novel hypothesis that the metabolism of leucine within the MBH couples the central sensing of leucine with the control of glucose production by the liver. We performed either central (MBH) or systemic infusions of leucine in Sprague-Dawley male rats during basal pancreatic insulin clamps in combination with various pharmacological and molecular interventions designed to modulate leucine metabolism in the MBH. We also examined the role of hypothalamic ATP-sensitive K(+) channels (K(ATP) channels) in the effects of leucine. Enhancing the metabolism of leucine acutely in the MBH lowered blood glucose through a biochemical network that was insensitive to rapamycin but strictly dependent on the hypothalamic metabolism of leucine to α-ketoisocaproic acid and, further, insensitive to acetyl- and malonyl-CoA. Functional K(ATP) channels were also required. Importantly, molecular attenuation of this central sensing mechanism in rats conferred susceptibility to developing hyperglycemia. We postulate that the metabolic sensing of leucine in the MBH is a previously unrecognized mechanism for the regulation of hepatic glucose production required to maintain glucose homeostasis.
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Affiliation(s)
- Ya Su
- Department of Medicine, Diabetes Research and Training Center, Albert Einstein College of Medicine, Bronx, New York
| | - Tony K.T. Lam
- Department of Medicine, Diabetes Research and Training Center, Albert Einstein College of Medicine, Bronx, New York
| | - Wu He
- Department of Medicine, Diabetes Research and Training Center, Albert Einstein College of Medicine, Bronx, New York
| | - Alessandro Pocai
- Department of Medicine, Diabetes Research and Training Center, Albert Einstein College of Medicine, Bronx, New York
| | - Joseph Bryan
- Pacific Northwest Research Institute, Seattle, Washington
| | | | - Roger Gutiérrez-Juárez
- Department of Medicine, Diabetes Research and Training Center, Albert Einstein College of Medicine, Bronx, New York
- Corresponding author: Roger Gutiérrez-Juárez,
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27
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Salinity regulates N-methylation of phosphatidylethanolamine in euryhaline crustaceans hepatopancreas and exchange of newly-formed phosphatidylcholine with hemolymph. J Comp Physiol B 2011; 181:731-40. [DOI: 10.1007/s00360-011-0562-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Revised: 02/15/2011] [Accepted: 02/19/2011] [Indexed: 10/18/2022]
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28
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Delcambe L. L'Iturine. II. Composition en Acides Aminés, Spectre Ultraviolet et Structure Cyclique. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19650740705] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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29
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van der Schaaf PC, Huisman THJ. The estimation of some different kinds of human haemoglobin. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19550740508] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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30
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Vandesande F. A New Synthesis of Oxytocin Using S-Carbobenzoxy-Cysteines and N-p-Methoxybenzyloxycarbonyl-Amino Acids as Intermediates. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19690780708] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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LUNDQUIST F, GALATIUS-JENSEN H. Quantitative Determination of Amino Acids by Combined Displacement — and Paper Chromatography. Scandinavian Journal of Clinical and Laboratory Investigation 2010; 12:342-52. [PMID: 14418938 DOI: 10.3109/00365516009062448] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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32
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de Noronha SMR, Corrêa SAA, Poletti EF, Lopes DD, da Silva CC, Sforça ML, Shimuta SI, Zanchin NIT, Nakaie CR, da Silva IDCG. Structural analysis of three peptides related to the transmambranic helix VI of AT1 receptor. Neuropeptides 2010; 44:115-8. [PMID: 20006383 DOI: 10.1016/j.npep.2009.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2009] [Revised: 11/11/2009] [Accepted: 11/12/2009] [Indexed: 10/20/2022]
Abstract
INTRODUCTION Angiotensin II (AII) is the main active product of the renin angiotensin system. Better known effects of AII are via AT1 receptor (AT1R). Expression of AT1R mutants (L265D and L262D) in CHO cells increased cAMP formation when compared to CHO cells expressing the wild type (WT) AT1R. Morphological transformation of CHO cells transfected with mutants correlated with their increased cAMP formation. DNA synthesis was inhibited in these cells too, indicating that cAMP promotes inhibitory effects on transfected CHO cells growth and causes their morphological change from a tumorigenic phenotype to a non-tumorigenic one. OBJECTIVES To assess the importance of leucine 262 and 265 in determining AT1R structure by means of a comparative structural analysis of two mutant peptides and of a wild-type fragment. METHODOLOGY Three peptides had their conformation compared by circular dichroism (CD): L262D(259-272), L265D(259-272) (mutants) and WT(260-277). RESULTS Secondary structures were: beta-turn for WT and L262D and random coil for L265D. CONCLUSIONS Strong correlation was found in the results of biochemical, cellular and structural approaches used to compare WT AT1R to mutant types. Random coil structure of the L265D mutant may be a key point to explain those changes observed in biochemical (binding and signal transduction) and proliferation assays (Correa et al., 2005). beta-Turn formation is an important step during early protein folding and this secondary simple structure is present in L262D and WT, but not in L265D. Therefore, leucine 265 seems to play a crucial role in determining an entirely functional AT1R.
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Affiliation(s)
- Samuel Marcos Ribeiro de Noronha
- Ginecologia Molecular/Ginecologia, UNIFESP-R. Pedro de Toledo, 791 - 4o. Andar, V. Clementino, CEP04039032 Sao Paulo, SP, Brazil.
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Xiao J, Koo H. Structural organization and dynamics of exopolysaccharide matrix and microcolonies formation by Streptococcus mutans in biofilms. J Appl Microbiol 2009; 108:2103-13. [PMID: 19941630 DOI: 10.1111/j.1365-2672.2009.04616.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS To investigate the structural organization and dynamics of exopolysaccharides (EPS) matrix and microcolonies formation by Streptococcus mutans during the biofilm development process. METHODS AND RESULTS Biofilms of Strep. mutans were formed on saliva-coated hydroxyapatite (sHA) discs in the presence of glucose or sucrose (alone or mixed with starch). At specific time points, biofilms were subjected to confocal fluorescence imaging and computational analysis. EPS matrix was steadily formed on sHA surface in the presence of sucrose during the first 8 h followed by a threefold biomass increase between 8 and 30 h of biofilm development. The initial formation and further development of three-dimensional microcolony structure occurred concomitantly with EPS matrix synthesis. Tridimensional renderings showed EPS closely associated with microcolonies throughout the biofilm development process forming four distinct domains (i) between sHA surface and microcolonies, (ii) within, (iii) covering and (iv) filling the spaces between microcolonies. The combination of starch and sucrose resulted in rapid formation of elevated amounts of EPS matrix and faster assembly of microcolonies by Strep. mutans, which altered their structural organization and susceptibility of the biofilm to acid killing (vs sucrose-grown biofilms; P < 0.05). CONCLUSIONS Our data indicate that EPS modulate the development, sequence of assembly and spatial distribution of microcolonies by Strep. mutans. SIGNIFICANCE AND IMPACT OF THE STUDY Simultaneous visualization and analysis of EPS matrix and microcolonies provide a more precise examination of the structural organization of biofilms than labelling bacteria alone, which could be a useful approach to elucidate the exact mechanisms by which Strep. mutans influences oral biofilm formation and possibly identify novel targets for effective antibiofilm therapies.
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Affiliation(s)
- J Xiao
- Eastman Department of Dentistry, University of Rochester, Rochester, NY 14642, USA
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Schiller K, Šimeček K, Oslage HJ. Mikrobiell produzierte Eiweißfuttermittel in der Tierernährung. ACTA ACUST UNITED AC 2009. [DOI: 10.1111/j.1439-0396.1972.tb00188.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Krampitz G. Vergleichende Untersuchungen zur Frage der Proteinhydrolyse im Hinblick auf die Herabsetzung des Zerstörungsgrades der Eiweißbausteine. ACTA ACUST UNITED AC 2009. [DOI: 10.1111/j.1439-0396.1960.tb00844.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Krampitz G, Wieneke J. Beiträge zur Aminosäuren-Bestimmung in biologischem Material: 7. Mitteilung. ACTA ACUST UNITED AC 2009. [DOI: 10.1111/j.1439-0396.1963.tb00710.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Krampitz G. Vergleichende Untersuchungen zur Frage der Proteinhydrolyse im Hinblick auf die Herabsetzung des Zerstörungsgrades der Eiweißbausteine. ACTA ACUST UNITED AC 2009. [DOI: 10.1111/j.1439-0396.1960.tb00850.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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38
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Giorgi A, Mingozzi M, Madeo M, Speranza G, Cocucci M. Effect of nitrogen starvation on the phenolic metabolism and antioxidant properties of yarrow (Achillea collina Becker ex Rchb.). Food Chem 2009. [DOI: 10.1016/j.foodchem.2008.09.039] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Hamard A, Sève B, Le Floc'h N. A moderate threonine deficiency differently affects protein metabolism in tissues of early-weaned piglets. Comp Biochem Physiol A Mol Integr Physiol 2009; 152:491-7. [DOI: 10.1016/j.cbpa.2008.12.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2008] [Revised: 12/04/2008] [Accepted: 12/04/2008] [Indexed: 10/21/2022]
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Zia-Ur-Rahman, Bukhari SA, Ahmad N, Akhtar N, Ijaz A, Yousaf MS, Haq IU. Dynamics of Follicular Fluid in One-humped Camel (Camelus dromedarius). Reprod Domest Anim 2008; 43:664-71. [DOI: 10.1111/j.1439-0531.2007.00967.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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CHRISTOPHE J, WODON C. Composition en acides aminés du tissu adipeux épididymaire du rat normal. ACTA ACUST UNITED AC 2008; 71:720-40. [PMID: 14097307 DOI: 10.3109/13813456309092193] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Doménech-Carbó MT. Novel analytical methods for characterising binding media and protective coatings in artworks. Anal Chim Acta 2008; 621:109-39. [PMID: 18573376 DOI: 10.1016/j.aca.2008.05.056] [Citation(s) in RCA: 115] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2008] [Revised: 05/15/2008] [Accepted: 05/15/2008] [Indexed: 11/19/2022]
Abstract
Since the first reported analytical studies and technical examinations of art and archaeological objects conducted in the late 18th century, analytical techniques and methods applied to the study of artworks have constantly grown. Among the materials composing the art object, organic compounds used as binding media or protective coatings have attracted the attention of the conservation profession given their noticeable ability for undergoing morphological and chemical changes on ageing. Thus, the aim of this paper is to review the most recent advances in the identification and determination of organic compounds present in art and art conservation materials. Immunofluorescence techniques have been proposed in recent decades as an alternative to the classical and simpler microchemical tests. Besides, a variety of instrumental techniques have also been improved in an attempt to enhance the sensitivity, repeatability and accuracy of the analytical results. Spectroscopic techniques, such as UV-vis, FTIR and Raman spectroscopy, have been coupled with light microscopes for these purposes. Synchrotron radiation FTIR microspectroscopy has also been successfully applied to the analysis of artworks. Mass spectrometry has also been increasingly used as a detector system coupled with a chromatographic device. Chromatographic methods have also improved in recent years. Paper and thin layer chromatographic techniques have been progressively replaced with gas chromatography (GC), pyrolysis-GC, high performance liquid chromatography and capillary electrophoresis. More complex proteomics hyphenated techniques, such as nano-liquid chromatography-nano-electrospray ionisation/collision quadrupole time-of-flight tandem mass spectrometry, have been recently applied to the identification and determination of proteinaceous binders. Microbeam analytical techniques have also been incorporated into the list of advanced instrumental techniques for art conservation purposes. Finally, a number of new instrumental techniques have been proposed as a suitable alternative to the conventional microscopy techniques for morphological studies.
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Affiliation(s)
- María Teresa Doménech-Carbó
- Institut de Restauració del Patrimoni, Universitat Politécnica de València, Camí de Vera s/n, 46022 València, Spain.
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DAVIES MG. Fully automated analysis of amino acids in foods by ion exchange chromatography. Int J Food Sci Technol 2007. [DOI: 10.1111/j.1365-2621.1974.tb01773.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Seguer J, Selve C, Infante M. NEW NON-IONIC SURFACTANTS FROM LYSINE AND THEIR PERFORMANCE. J DISPER SCI TECHNOL 2007. [DOI: 10.1080/01932699408943576] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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45
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SCHONHEYDER F, LYNGBYE J. Influence of partial starvation and of acute scurvy on the free amino acids in blood plasma and muscle in the guinea-pig. Br J Nutr 2007; 16:75-82. [PMID: 13909168 DOI: 10.1079/bjn19620008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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