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Kim DR, Martin S, Desai K. The effects of a comparatively higher dose of 1000 mg/kg/d of oral L- or D-arginine on the L-arginine metabolic pathways in male Sprague-Dawley rats. PLoS One 2023; 18:e0289476. [PMID: 37527267 PMCID: PMC10393177 DOI: 10.1371/journal.pone.0289476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 07/19/2023] [Indexed: 08/03/2023] Open
Abstract
Oral L-arginine supplements are popular mainly for their nitric oxide mediated vasodilation, but their physiological impact is not fully known. L-arginine is a substrate of several enzymes including arginase, nitric oxide synthase, arginine decarboxylase, and arginine: glycine amidinotransferase (AGAT). We have published a study on the physiological impact of oral L- and D-arginine at 500 mg/kg/day for 4 wks in male Sprague-Dawley rats. We investigated the effects of oral L-arginine and D-arginine at a higher dose of 1000 mg/kg/d for a longer treatment duration of 16 wks in 9-week-old male Sprague-Dawley rats. We measured the expression and activity of L-arginine metabolizing enzymes, and levels of their metabolites in the plasma and various organs. L-arginine did not affect the levels of L-arginine and L-lysine in the plasma and various organs. L-arginine decreased arginase protein expression in the upper small intestine, and arginase activity in the plasma. It also decreased AGAT protein expression in the liver, and creatinine levels in the urine. L-arginine altered arginine decarboxylase protein expression in the upper small intestine and liver, with increased total polyamines plasma levels. Endothelial nitric oxide synthase protein was increased with D-arginine, the presumed metabolically inert isomer, but not L-arginine. In conclusion, oral L-arginine and D-arginine at a higher dose and longer treatment duration significantly altered various enzymes and metabolites in the arginine metabolic pathways, which differed from alterations produced by a lower dose shorter duration treatment published earlier. Further studies with differing doses and duration would allow for a better understanding of oral L-arginine uses, and evidence based safe and effective dose range and duration.
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Affiliation(s)
- Dain Raina Kim
- Department of Anatomy, Physiology & Pharmacology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Sarah Martin
- Department of Anatomy, Physiology & Pharmacology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Kaushik Desai
- Department of Anatomy, Physiology & Pharmacology, University of Saskatchewan, Saskatoon, SK, Canada
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Wang Y, Li Z, Chen R. Simultaneous Determination of Metabolites Related to Arginine Metabolism in Rat plasma by Hydrophilic Interaction Chromatography-Tandem Mass Spectrometry. J Chromatogr Sci 2023; 61:203-210. [PMID: 35704851 DOI: 10.1093/chromsci/bmac047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 04/15/2022] [Accepted: 05/20/2022] [Indexed: 11/14/2022]
Abstract
Arginine and its metabolites play important roles in pain and analgesia. This study aimed to develop a comprehensive quantification method for amino acids and metabolites related to arginine metabolism in rat plasma by hydrophilic interaction chromatography-tandem mass spectrometry (HILIC-MS/MS). Rat plasma was diluted to reduce the matrix effect and deproteinized with acetonitrile. The analytes were separated on a Syncronis HILIC column with a gradient elution. MS analysis was performed in positive ion mode with an electrospray ionization source using multiple reaction monitoring technology. All calibration curves for the 10 analytes showed good linear regression (R2 > 0.99). The limits of detection (LODs) were in the range of 0.9-13.4 μg/L. The established method was validated for intra-day and inter-day precisions (relative standard deviation [RSDs] < 6.21%) and accuracy (average recovery ranged from 87.34% to 100.35% with the RSD values less than 11.41%). This method was successfully applied to characterize dynamic alterations in the plasma of rats with neuropathic pain and thus provide service to explore the mechanism of action between metabolite changes and clinical disease.
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Affiliation(s)
- Ying Wang
- School of Basic Medicine, Zunyi Medical University, Zunyi 563000, P. R. China
- Life Sciences Institute, Zunyi Medical University, Zunyi 563000, P. R. China
| | - ZhiRong Li
- School of Basic Medicine, Zunyi Medical University, Zunyi 563000, P. R. China
| | - RongXiang Chen
- School of Basic Medicine, Zunyi Medical University, Zunyi 563000, P. R. China
- Life Sciences Institute, Zunyi Medical University, Zunyi 563000, P. R. China
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Kido K, Koshinaka K, Iizawa H, Honda H, Hirota A, Nakamura T, Arikawa M, Ra SG, Kawanaka K. Egg White Protein Promotes Developmental Growth in Rodent Muscle Independently of Leucine Content. J Nutr 2022; 152:117-129. [PMID: 34610138 DOI: 10.1093/jn/nxab353] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 08/24/2021] [Accepted: 09/24/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Leucine has unique anabolic properties, serving as a nutrient signal that stimulates muscle protein synthesis. OBJECTIVE We tested whether the leucine concentration is the only factor determining protein quality for muscle development. METHODS We selected 3 dietary proteins: casein (CAS), egg white protein (EWP), and albumin (ALB), representing the leucine concentrations of ∼8.3%, 7.7%, and 6.7% of the total protein (wt:wt), respectively. In the chronic feeding experiment, these proteins were pair-fed to growing male Wistar rats [110-135 g body weight (BW)] for 14 d as a protein source, providing 10% of total energy intake, after which soleus and extensor digitorum longus (EDL) muscles were used to estimate muscle growth. In the acute administration experiment, we injected CAS, ALB, and EWP to rats by oral gavage (0.3 g protein/100 g BW), and after 1 or 3 h EDL muscle was excised for capillary electrophoresis-MS-based metabolomics. In another chronic feeding experiment, rats were pair-fed either CAS or a CAS diet supplemented with arginine to the same level as in the EWP diet for 14 d. RESULTS At the end of the 14-d feeding, soleus and EDL muscle weight was 20% and 17% higher, respectively, when rats were fed EWP as compared with CAS (P < 0.05). In addition, the 14-d EWP diet increased the expression of p70S6K by 117% compared with CAS (P < 0.05). These results suggest the possibility that some amino acids (excluding leucine), derived from EWP, promote muscle growth. Metabolomics analysis showed that muscle arginine concentration, following acute protein administration, appeared to match muscle growth over the 14-d feeding period. In addition, 14-d arginine supplementation to a CAS diet increased EDL muscle weight by 15% when compared with the plain CAS diet (P < 0.05). CONCLUSIONS EWP promotes rat developmental muscle growth compared with CAS, which can be partly explained by the arginine-rich EWP.
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Affiliation(s)
- Kohei Kido
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan.,Institute for Physical Activity, Fukuoka University, Fukuoka, Japan
| | - Keiichi Koshinaka
- Department of Health and Sports, Niigata University of Health and Welfare, Niigata, Japan
| | - Hiroki Iizawa
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan.,Institute for Physical Activity, Fukuoka University, Fukuoka, Japan
| | - Hiroki Honda
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan.,Institute for Physical Activity, Fukuoka University, Fukuoka, Japan
| | - Ayumu Hirota
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan.,Institute for Physical Activity, Fukuoka University, Fukuoka, Japan
| | - Taishi Nakamura
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan
| | - Miku Arikawa
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan
| | - Song-Gyu Ra
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan.,Institute for Physical Activity, Fukuoka University, Fukuoka, Japan.,Institute of Liberal Arts and Sciences, Tokushima University, Tokushima, Japan
| | - Kentaro Kawanaka
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan.,Institute for Physical Activity, Fukuoka University, Fukuoka, Japan
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Dan H, Haichao Z, Ziyang Y, Di Z, Shuihan Z. Protective effects of Fufang Ejiao Jiang against aplastic anemia assessed by network pharmacology and metabolomics strategy. DIGITAL CHINESE MEDICINE 2021. [DOI: 10.1016/j.dcmed.2021.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Liu Y, Shen T, Chen L, Zhou J, Wang C. Analogs of the Cathelicidin-Derived Antimicrobial Peptide PMAP-23 Exhibit Improved Stability and Antibacterial Activity. Probiotics Antimicrob Proteins 2021; 13:273-286. [PMID: 32666297 DOI: 10.1007/s12602-020-09686-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Antimicrobial peptides (AMPs) have gained interesting as a new type of antimicrobial agent. The cathelicidin-derived antimicrobial peptide PMAP-23 has broad-spectrum antibacterial activity, and to improve its antimicrobial activity, we used amino acid substitution at position 5 or 19 of PMAP-23 to design three analogs, named PMAP-23R (Leu5--Arg), PMAP-23I (Thr19--Ile), and PMAP-23RI (Leu5--Arg and Thr19--Ile). We found that the analog peptides exhibited higher stability and improved antibacterial activity compared with PMAP-23. Additionally, the analog peptides PMAP-23I and PMAP-23RI inhibited the growth of Shigella flexneri CICC 21534, whereas PMAP-23 and PMAP-23R exhibited no antibacterial activity against S. flexneri CICC 21534. Moreover, the peptide analogs showed negligible hemolysis and cytotoxicity. We also found that PMAP-23RI exerted impressive therapeutic effects on mice infected with Staphylococcus aureus ATCC 25923 and Salmonella enterica serovar Typhimurium SL1344. PMAP-23RI induced a greater reduction in pathological damage and a higher decrease in the bacterial gene copies in the lung and liver tissues and greatly reduced mouse mortality. In conclusion, the peptide analogs PMAP-23R, PMAP-23I, and PMAP-23RI enhanced the stability and antimicrobial activity of PMAP-23, but PMAP-23RI exhibits more promise as a new antimicrobial agent candidate for the treatment of bacterial infections.
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Affiliation(s)
- Yongqing Liu
- College of Animal Science and Technology, Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang, 471023, People's Republic of China
| | - Tengfei Shen
- College of Animal Science and Technology, Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang, 471023, People's Republic of China
| | - Liangliang Chen
- College of Animal Science and Technology, Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang, 471023, People's Republic of China
| | - Jiangfei Zhou
- College of Animal Science and Technology, Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang, 471023, People's Republic of China
| | - Chen Wang
- College of Animal Science and Technology, Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang, 471023, People's Republic of China.
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Boccanegra B, Verhaart IEC, Cappellari O, Vroom E, De Luca A. Safety issues and harmful pharmacological interactions of nutritional supplements in Duchenne muscular dystrophy: considerations for Standard of Care and emerging virus outbreaks. Pharmacol Res 2020; 158:104917. [PMID: 32485610 PMCID: PMC7261230 DOI: 10.1016/j.phrs.2020.104917] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 05/08/2020] [Accepted: 05/08/2020] [Indexed: 12/13/2022]
Abstract
At the moment, little treatment options are available for Duchenne muscular dystrophy (DMD). The absence of the dystrophin protein leads to a complex cascade of pathogenic events in myofibres, including chronic inflammation and oxidative stress as well as altered metabolism. The attention towards dietary supplements in DMD is rapidly increasing, with the aim to counteract pathology-related alteration in nutrient intake, the consequences of catabolic distress or to enhance the immunological response of patients as nowadays for the COVID-19 pandemic emergency. By definition, supplements do not exert therapeutic actions, although a great confusion may arise in daily life by the improper distinction between supplements and therapeutic compounds. For most supplements, little research has been done and little evidence is available concerning their effects in DMD as well as their preventing actions against infections. Often these are not prescribed by clinicians and patients/caregivers do not discuss the use with their clinical team. Then, little is known about the real extent of supplement use in DMD patients. It is mistakenly assumed that, since compounds are of natural origin, if a supplement is not effective, it will also do no harm. However, supplements can have serious side effects and also have harmful interactions, in terms of reducing efficacy or leading to toxicity, with other therapies. It is therefore pivotal to shed light on this unclear scenario for the sake of patients. This review discusses the supplements mostly used by DMD patients, focusing on their potential toxicity, due to a variety of mechanisms including pharmacodynamic or pharmacokinetic interactions and contaminations, as well as on reports of adverse events. This overview underlines the need for caution in uncontrolled use of dietary supplements in fragile populations such as DMD patients. A culture of appropriate use has to be implemented between clinicians and patients' groups.
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Affiliation(s)
- Brigida Boccanegra
- Unit of Pharmacology, Department of Pharmacy and Drug Sciences, University of Bari Aldo Moro, Bari, Italy
| | - Ingrid E C Verhaart
- Department of Human Genetics, Leiden University Medical Center, Leiden, the Netherlands; Duchenne Parent Project, the Netherlands
| | - Ornella Cappellari
- Unit of Pharmacology, Department of Pharmacy and Drug Sciences, University of Bari Aldo Moro, Bari, Italy
| | - Elizabeth Vroom
- Duchenne Parent Project, the Netherlands; World Duchenne Organisation (UPPMD), the Netherlands
| | - Annamaria De Luca
- Unit of Pharmacology, Department of Pharmacy and Drug Sciences, University of Bari Aldo Moro, Bari, Italy.
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Xu P, Pan C, Cui G, Wei C, Wang L, Li Y, Li X, Huang S. Enhancement of l-amino acid oxidase production by Bacillus subtilis HLZ-68 with oxygen-vector and asymmetric degradation of dl-arginine to d-arginine. BIOTECHNOL BIOTEC EQ 2020. [DOI: 10.1080/13102818.2020.1834454] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Affiliation(s)
- Peng Xu
- College of Life Science and Technology, Guangxi University, Nanning, China
| | - Changpei Pan
- Nanning Science and Technology Enterprise Incubation Base Co., Ltd., Nanning, China
| | - Gongcheng Cui
- College of Life Science and Technology, Guangxi University, Nanning, China
| | - ChunYan Wei
- College of Life Science and Technology, Guangxi University, Nanning, China
| | - Lijuan Wang
- College of Life Science and Technology, Guangxi University, Nanning, China
| | - Yanting Li
- College of Life Science and Technology, Guangxi University, Nanning, China
| | - Xiangping Li
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Shihai Huang
- College of Life Science and Technology, Guangxi University, Nanning, China
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