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Moulya KP, Manjunatha JG, Osman SM, Ataollahi N. A novel and efficient voltammetric sensor for the simultaneous determination of alizarin red S and tartrazine by using poly( leucine) functionalized carbon paste electrode. J Environ Sci Health A Tox Hazard Subst Environ Eng 2024; 59:103-112. [PMID: 38613456 DOI: 10.1080/10934529.2024.2339160] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 03/27/2024] [Indexed: 04/15/2024]
Abstract
In the current work, a rapid, selective, and sensitive technique was developed for the detection of Alizarin Red S (ARS) by applying poly leucine modified carbon paste electrode (PLMCPE). Electrochemical impedance spectroscopy (EIS) and Scanning electron microscopy (SEM) were utilized to study the surface morphology of unmodified carbon paste electrode (UMCPE) and PLMCPE. The active surface area for UMCPE and PLMCPE was found to be 0.0012 cm2 and 0.0026 cm2 respectively. The electrochemical response of ARS at UMCPE and PLMCPE was analyzed using cyclic voltammetry (CV) in the potential window of 0.4 to 1.0 V. The cyclic voltammogram obtained for varying the pH of 0.2 M phosphate buffer (PB) solution showed maximum current for the oxidation of ARS at pH 6.5. The electrochemical reaction of ARS was found to be irreversible and adsorption controlled. The effect of variation of concentration of ARS on the oxidation peak current was evaluated using CV and linear scan voltammetry (LSV). A linear relationship between the concentration variation and current was obtained in the linear range of 1.5 μM-3.5 μM and 0.2 μM-5.0 μM for CV and LSV respectively. The limit of detection (LOD) of 0.68 μM for the CV method and 0.29 μM for the LSV method was exhibited by the developed sensor. The simultaneous study of ARS along with tartrazine (TZ) showed good selectivity for ARS. The interferents of foreign molecules showed no effect on the selectivity of the electrode. The applicability of PLMCPE on real samples gave good recovery ranging from 97.46-101.2%; hence, the sensor can be utilized on real samples. The developed sensor has good stability and sensitivity.
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Affiliation(s)
- Karnayana Prasad Moulya
- Department of Chemistry, FMKMC College, Mangalore University Constituent College, Madikeri, Karnataka, India
| | - Jamballi G Manjunatha
- Department of Chemistry, FMKMC College, Mangalore University Constituent College, Madikeri, Karnataka, India
| | - Sameh M Osman
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Narges Ataollahi
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Trento, Italy
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Alves PKN, Schauer A, Augstein A, Prieto Jarabo ME, Männel A, Barthel P, Vahle B, Moriscot AS, Linke A, Adams V. Leucine Supplementation Prevents the Development of Skeletal Muscle Dysfunction in a Rat Model of HFpEF. Cells 2024; 13:502. [PMID: 38534346 PMCID: PMC10969777 DOI: 10.3390/cells13060502] [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: 01/08/2024] [Revised: 03/07/2024] [Accepted: 03/12/2024] [Indexed: 03/28/2024] Open
Abstract
Heart failure with preserved ejection fraction (HFpEF) is associated with exercise intolerance due to alterations in the skeletal muscle (SKM). Leucine supplementation is known to alter the anabolic/catabolic balance and to improve mitochondrial function. Thus, we investigated the effect of leucine supplementation in both a primary and a secondary prevention approach on SKM function and factors modulating muscle function in an established HFpEF rat model. Female ZSF1 obese rats were randomized to an untreated, a primary prevention, and a secondary prevention group. For primary prevention, leucine supplementation was started before the onset of HFpEF (8 weeks of age) and for secondary prevention, leucine supplementation was started after the onset of HFpEF (20 weeks of age). SKM function was assessed at an age of 32 weeks, and SKM tissue was collected for the assessment of mitochondrial function and histological and molecular analyses. Leucine supplementation prevented the development of SKM dysfunction whereas it could not reverse it. In the primary prevention group, mitochondrial function improved and higher expressions of mitofilin, Mfn-2, Fis1, and miCK were evident in SKM. The expression of UCP3 was reduced whereas the mitochondrial content and markers for catabolism (MuRF1, MAFBx), muscle cross-sectional area, and SKM mass did not change. Our data show that leucine supplementation prevented the development of skeletal muscle dysfunction in a rat model of HFpEF, which may be mediated by improving mitochondrial function through modulating energy transfer.
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Affiliation(s)
- Paula Ketilly Nascimento Alves
- Heart Center Dresden, Laboratory of Molecular and Experimental Cardiology, TU Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (M.-E.P.J.); (A.M.); (B.V.); (A.L.)
- Department of Anatomy, Institute of Biomedical Sciences, University of Sao Paulo, São Paulo 05508000, Brazil;
| | - Antje Schauer
- Heart Center Dresden, Laboratory of Molecular and Experimental Cardiology, TU Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (M.-E.P.J.); (A.M.); (B.V.); (A.L.)
| | - Antje Augstein
- Heart Center Dresden, Laboratory of Molecular and Experimental Cardiology, TU Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (M.-E.P.J.); (A.M.); (B.V.); (A.L.)
| | - Maria-Elisa Prieto Jarabo
- Heart Center Dresden, Laboratory of Molecular and Experimental Cardiology, TU Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (M.-E.P.J.); (A.M.); (B.V.); (A.L.)
| | - Anita Männel
- Heart Center Dresden, Laboratory of Molecular and Experimental Cardiology, TU Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (M.-E.P.J.); (A.M.); (B.V.); (A.L.)
| | - Peggy Barthel
- Heart Center Dresden, Laboratory of Molecular and Experimental Cardiology, TU Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (M.-E.P.J.); (A.M.); (B.V.); (A.L.)
| | - Beatrice Vahle
- Heart Center Dresden, Laboratory of Molecular and Experimental Cardiology, TU Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (M.-E.P.J.); (A.M.); (B.V.); (A.L.)
| | - Anselmo S. Moriscot
- Department of Anatomy, Institute of Biomedical Sciences, University of Sao Paulo, São Paulo 05508000, Brazil;
| | - Axel Linke
- Heart Center Dresden, Laboratory of Molecular and Experimental Cardiology, TU Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (M.-E.P.J.); (A.M.); (B.V.); (A.L.)
| | - Volker Adams
- Heart Center Dresden, Laboratory of Molecular and Experimental Cardiology, TU Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (M.-E.P.J.); (A.M.); (B.V.); (A.L.)
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Paulussen KJM, Askow AT, Deutz MT, McKenna CF, Garvey SM, Guice JL, Kesler RM, Barnes TM, Tinker KM, Paluska SA, Ulanov AV, Bauer LL, Dilger RN, Burd NA. Acute Microbial Protease Supplementation Increases Net Postprandial Plasma Amino Acid Concentrations After Pea Protein Ingestion in Healthy Adults: A Randomized, Double-Blind, Placebo-Controlled Trial. J Nutr 2024:S0022-3166(24)00158-5. [PMID: 38467279 DOI: 10.1016/j.tjnut.2024.03.009] [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: 06/20/2023] [Revised: 03/05/2024] [Accepted: 03/08/2024] [Indexed: 03/13/2024] Open
Abstract
BACKGROUND Digestibility is a primary factor in determining the quality of dietary protein. Microbial protease supplementation may be a strategy for improving protein digestion and subsequent postprandial plasma amino acid availability. OBJECTIVES To assess the effect of co-ingesting a microbial protease mixture with pea protein on postprandial plasma amino acid concentrations. DESIGN A mixture of 3 microbial protease preparations (P3) was tested for proteolytic efficacy in an in vitro static simulation of gastrointestinal digestion. Subsequently, in a randomized, double-blind, placebo-controlled crossover trial, 24 healthy adults (27 ± 4 y; 12 females, 12 males) ingested 25 g pea protein isolate (20 g protein, 2.2 g fat) with either P3 or maltodextrin placebo (PLA). Blood samples were collected at baseline and throughout a 0‒5 h postprandial period and both the early (0-2 h) iAUC and total (0-5 h) iAUC were examined. RESULTS Plasma glucose concentrations decreased in both conditions (P < 0.001), with higher concentrations after P3 ingestion compared with PLA (P < 0.001). Plasma insulin concentrations increased for both conditions (P < 0.001) with no difference between conditions (P = 0.331). Plasma total amino acid (TAA) concentrations increased over time (P < 0.001) with higher concentrations observed for P3 compared with PLA (P = 0.010) during the 0‒5 h period. There was a trend for elevated essential amino acid (EAA) concentrations for P3 compared with PLA (P = 0.099) during the 0‒5 h postprandial period but not for leucine (P = 0.282) or branched-chain amino acids (BCAA, P = 0.410). The early net exposure (0‒2 h iAUC) to amino acids (leucine, BCAA, EAA, and TAA) was higher for P3 compared with PLA (all, P < 0.05). CONCLUSIONS Microbial protease co-ingestion increases plasma TAA concentrations (0-5 h) and leucine, BCAA, EAA, and TAA availability in the early postprandial period (0‒2 h) compared with ingesting pea protein with placebo in healthy adults.
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Affiliation(s)
- Kevin J M Paulussen
- Department of Health and Kinesiology, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Andrew T Askow
- Department of Health and Kinesiology, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Max T Deutz
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Colleen F McKenna
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Sean M Garvey
- Department of Research and Development, BIO-CAT, Inc., Troy, VA, United States
| | - Justin L Guice
- Department of Research and Development, BIO-CAT, Inc., Troy, VA, United States
| | - Richard M Kesler
- Department of Health and Kinesiology, University of Illinois Urbana-Champaign, Urbana, IL, United States; Illinois Fire Service Institute, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Takeshi M Barnes
- Department of Health and Kinesiology, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Kelly M Tinker
- Department of Research and Development, BIO-CAT, Inc., Troy, VA, United States
| | - Scott A Paluska
- Department of Health and Kinesiology, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Alexander V Ulanov
- Roy J. Carver Biotechnology Center, University of Illinois Urbana-Champaign, Urbana, IL, States
| | - Laura L Bauer
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Ryan N Dilger
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States; Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States; Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Nicholas A Burd
- Department of Health and Kinesiology, University of Illinois Urbana-Champaign, Urbana, IL, United States; Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States.
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Rivera CN, Smith CE, Draper LV, Kee ME, Cook NE, McGovern MR, Watne RM, Wommack AJ, Vaughan RA. The BCKDH kinase inhibitor BT2 promotes BCAA disposal and mitochondrial proton leak in both insulin-sensitive and insulin-resistant C2C12 myotubes. J Cell Biochem 2024; 125:e30520. [PMID: 38226684 DOI: 10.1002/jcb.30520] [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: 05/27/2023] [Revised: 11/29/2023] [Accepted: 12/21/2023] [Indexed: 01/17/2024]
Abstract
Elevated circulating branched-chain amino acids (BCAAs) have been correlated with the severity of insulin resistance, leading to recent investigations that stimulate BCAA metabolism for the potential benefit of metabolic diseases. BT2 (3,6-dichlorobenzo[b]thiophene-2-carboxylic acid), an inhibitor of branched-chain ketoacid dehydrogenase kinase, promotes BCAA metabolism by enhancing BCKDH complex activity. The purpose of this report was to investigate the effects of BT2 on mitochondrial and glycolytic metabolism, insulin sensitivity, and de novo lipogenesis both with and without insulin resistance. C2C12 myotubes were treated with or without low or moderate levels of BT2 with or without insulin resistance. Western blot and quantitative real-time polymerase chain reaction were used to assess protein and gene expression, respectively. Mitochondrial, nuclei, and lipid content were measured using fluorescent staining and microscopy. Cell metabolism was assessed via oxygen consumption and extracellular acidification rate. Liquid chromatography-mass spectrometry was used to quantify BCAA media content. BT2 treatment consistently promoted mitochondrial uncoupling following 24-h treatment, which occurred largely independent of changes in expressional profiles associated with mitochondrial biogenesis, mitochondrial dynamics, BCAA catabolism, insulin sensitivity, or lipogenesis. Acute metabolic studies revealed a significant and dose-dependent effect of BT2 on mitochondrial proton leak, suggesting BT2 functions as a small-molecule uncoupler. Additionally, BT2 treatment consistently and dose-dependently reduced extracellular BCAA levels without altering expression of BCAA catabolic enzymes or pBCKDHa activation. BT2 appears to act as a small-molecule mitochondrial uncoupler that promotes BCAA utilization, though the interplay between these two observations requires further investigation.
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Affiliation(s)
- Caroline N Rivera
- Department of Health and Human Performance, High Point University, High Point, North Carolina, USA
| | - Carly E Smith
- Department of Health and Human Performance, High Point University, High Point, North Carolina, USA
| | - Lillian V Draper
- Department of Health and Human Performance, High Point University, High Point, North Carolina, USA
| | - Madison E Kee
- Department of Health and Human Performance, High Point University, High Point, North Carolina, USA
| | - Norah E Cook
- Department of Health and Human Performance, High Point University, High Point, North Carolina, USA
| | - Macey R McGovern
- Department of Health and Human Performance, High Point University, High Point, North Carolina, USA
| | - Rachel M Watne
- Department of Chemistry, High Point University, High Point, North Carolina, USA
| | - Andrew J Wommack
- Department of Chemistry, High Point University, High Point, North Carolina, USA
| | - Roger A Vaughan
- Department of Health and Human Performance, High Point University, High Point, North Carolina, USA
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McKenna CF, Askow AT, Paulussen KJM, Salvador AF, Fang HY, Ulanov AV, Li Z, Paluska SA, Beals JW, Jäger R, Purpura M, Burd NA. Postabsorptive and postprandial myofibrillar protein synthesis rates at rest and after resistance exercise in women with post-menopause. J Appl Physiol (1985) 2024. [PMID: 38385186 DOI: 10.1152/japplphysiol.00886.2023] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 02/12/2024] [Indexed: 02/23/2024] Open
Abstract
Feeding and resistance exercise stimulate myofibrillar protein synthesis rates (MPS) in healthy adults. This anabolic characterization of 'healthy adults' has been namely focused on males. Therefore, the purpose of this study was to examine the temporal responses of MPS and anabolic signaling to resistance exercise alone or combined with the ingestion of protein in post-menopausal females and compare postabsorptive rates with young females. Sixteen females (60 ± 7 y; BMI = 26 ± 12 kg·m-2) completed an acute bout of unilateral resistance exercise before consuming either: a fortified whey protein supplement (WHEY) or water. Participants received primed continuous infusions of L-[ring-13C6]phenylalanine with bilateral muscle biopsies before and after treatment ingestion at 2 h and 4 h in non-exercised and exercised legs. Resistance exercise transiently increased MPS above baseline at 0-2 h in the water condition (P = 0.007). Feeding after exercise resulted in a late phase (2-4 h) increase in MPS in the WHEY condition (P = 0.005). In both conditions, exercise did not enhance the cumulative (0-4 h) MPS response. In the non-exercised leg, MPS did not differ at 0-2 h, 2-4 h, or 0-4 h of the measurement periods (all, P > 0.05). Likewise, there were no changes in the phosphorylation of p70S6K, AMPKα, or total and phosphorylated yes-associated protein on Ser127. Post-absorptive MPS were lower in pre-menopausal vs. post-menopausal females (P = 0.023). We show that resistance exercise-induced changes in MPS are temporally regulated, but do not result in greater cumulative (0-4 h) MPS in post-menopausal women.
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Affiliation(s)
- Colleen F McKenna
- Division of Endocrinology, Metabolism, and Diabetes, University of Illinois Urbana-Champaign, Aurora, CO, United States
| | - Andrew T Askow
- Department of Kinesiology and Community Health, University of Illinois at Urbana Champaign, Urbana, IL, United States
| | - Kevin J M Paulussen
- Department of Kinesiology and Community Health, University of Illinois at Urbana Champaign, Urbana, IL, United States
| | - Amadeo F Salvador
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Hsin-Yu Fang
- Department of Kinesiology and Community Health, University of Illinois at Urbana Champaign, Urbana, IL, United States
| | - Alexander V Ulanov
- Roy J. Carver Biotechnology Center, University of Illinois at Urbana Champaign, Urbana, IL, United States
| | - Zhong Li
- Roy J. Carver Biotechnology Center, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Scott A Paluska
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Joseph W Beals
- Division of Nutritional Sciences, University of Illinois at Urbana Champaign, Urbana, IL, United States
| | - Ralf Jäger
- Increnovo LLC, Milwaukee, WI, United States
| | | | - Nicholas A Burd
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, Illinois, United States
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Huang TN, Shih YT, Yen TL, Hsueh YP. Vcp overexpression and leucine supplementation extend lifespan and ameliorate neuromuscular junction phenotypes of a SOD1G93A-ALS mouse model. Hum Mol Genet 2024:ddae022. [PMID: 38382647 DOI: 10.1093/hmg/ddae022] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 01/12/2024] [Accepted: 02/01/2024] [Indexed: 02/23/2024] Open
Abstract
Many genes with distinct molecular functions have been linked to genetically heterogeneous amyotrophic lateral sclerosis (ALS), including SuperOxide Dismutase 1 (SOD1) and Valosin-Containing Protein (VCP). SOD1 converts superoxide to oxygen and hydrogen peroxide. VCP acts as a chaperon to regulate protein degradation and synthesis and various other cellular responses. Although the functions of these two genes differ, in the current report we show that overexpression of wild-type VCP in mice enhances lifespan and maintains the size of neuromuscular junctions (NMJs) of both male and female SOD1G93A mice, a well-known ALS mouse model. Although VCP exerts multiple functions, its regulation of ER formation and consequent protein synthesis has been shown to play the most important role in controlling dendritic spine formation and social and memory behaviors. Given that SOD1 mutation results in protein accumulation and aggregation, it may direct VCP to the protein degradation pathway, thereby impairing protein synthesis. Since we previously showed that the protein synthesis defects caused by Vcp deficiency can be improved by leucine supplementation, to confirm the role of the VCP-protein synthesis pathway in SOD1-linked ALS, we applied leucine supplementation to SOD1G93A mice and, similar to Vcp overexpression, we found that it extends SOD1G93A mouse lifespan. In addition, the phenotypes of reduced muscle strength and fewer NMJs of SOD1G93A mice are also improved by leucine supplementation. These results support the existence of crosstalk between SOD1 and VCP and suggest a critical role for protein synthesis in ASL. Our study also implies a potential therapeutic treatment for ALS.
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Affiliation(s)
- Tzyy-Nan Huang
- Institute of Molecular Biology, Academia Sinica, 128 Sec 2, Academia Rd, Taipei, 11529, Taiwan, ROC
| | - Yu-Tzu Shih
- Institute of Molecular Biology, Academia Sinica, 128 Sec 2, Academia Rd, Taipei, 11529, Taiwan, ROC
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Tzu-Li Yen
- Institute of Molecular Biology, Academia Sinica, 128 Sec 2, Academia Rd, Taipei, 11529, Taiwan, ROC
| | - Yi-Ping Hsueh
- Institute of Molecular Biology, Academia Sinica, 128 Sec 2, Academia Rd, Taipei, 11529, Taiwan, ROC
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7
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Kaplan K, Levkovich SA, DeRowe Y, Gazit E, Laor Bar-Yosef D. Mind your marker: the effect of common auxotrophic markers on complex traits in yeast. FEBS J 2024. [PMID: 38383986 DOI: 10.1111/febs.17095] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 01/02/2024] [Accepted: 02/05/2024] [Indexed: 02/23/2024]
Abstract
Yeast cells are extensively used as a key model organism owing to their highly conserved genome, metabolic pathways, and cell biology processes. To assist in genetic engineering and analysis, laboratory yeast strains typically harbor auxotrophic selection markers. When uncompensated, auxotrophic markers cause significant phenotypic bias compared to prototrophic strains and have different combinatorial influences on the metabolic network. Here, we used BY4741, a laboratory strain commonly used as a "wild type" strain in yeast studies, to generate a set of revertant strains, containing all possible combinations of four common auxotrophic markers (leu2∆, ura3∆, his3∆1, met15∆). We examined the effect of the auxotrophic combinations on complex phenotypes such as resistance to rapamycin, acetic acid, and ethanol. Among the markers, we found that leucine auxotrophy most significantly affected the phenotype. We analyzed the phenotypic bias caused by auxotrophy at the genomic level using a prototrophic version of a genome-wide deletion library and a decreased mRNA perturbation (DAmP) library. Prototrophy was found to suppress rapamycin sensitivity in many mutants previously annotated for the phenotype, raising a possible need for reevaluation of the findings in a native metabolic context. These results reveal a significant phenotypic bias caused by common auxotrophic markers and support the use of prototrophic wild-type strains in yeast research.
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Affiliation(s)
- Keila Kaplan
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel
| | - Shon A Levkovich
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel
| | - Yasmin DeRowe
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel
| | - Ehud Gazit
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Israel
| | - Dana Laor Bar-Yosef
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel
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8
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Tauriainen MM, Csader S, Lankinen M, Lo KK, Chen C, Lahtinen O, El-Nezamy H, Laakso M, Schwab U. PNPLA3 Genotype and Dietary Fat Modify Concentrations of Plasma and Fecal Short Chain Fatty Acids and Plasma Branched-Chain Amino Acids. Nutrients 2024; 16:261. [PMID: 38257154 PMCID: PMC10819939 DOI: 10.3390/nu16020261] [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: 11/01/2023] [Revised: 12/11/2023] [Accepted: 12/25/2023] [Indexed: 01/24/2024] Open
Abstract
The GG genotype of the Patatin-like phosphatase domain-containing 3 (PNPLA3), dietary fat, short-chain fatty acids (SCFA) and branched-chain amino acids (BCAA) are linked with non-alcoholic fatty liver disease. We studied the impact of the quality of dietary fat on plasma (p) and fecal (f) SCFA and p-BCAA in men homozygous for the PNPLA3 rs738409 variant (I148M). Eighty-eight randomly assigned men (age 67.8 ± 4.3 years, body mass index 27.1 ± 2.5 kg/m2) participated in a 12-week diet intervention. The recommended diet (RD) group followed the National and Nordic nutrition recommendations for fat intake. The average diet (AD) group followed the average fat intake in Finland. The intervention resulted in a decrease in total p-SCFAs and iso-butyric acid in the RD group (p = 0.041 and p = 0.002). Valeric acid (p-VA) increased in participants with the GG genotype regardless of the diet (RD, 3.6 ± 0.6 to 7.0 ± 0.6 µmol/g, p = 0.005 and AD, 3.8 ± 0.3 to 9.7 ± 8.5 µmol/g, p = 0.015). Also, genotype relation to p-VA was seen statistically significantly in the RD group (CC: 3.7 ± 0.4 to 4.2 ± 1.7 µmol/g and GG: 3.6 ± 0.6 to 7.0 ± 0.6 µmol/g, p = 0.0026 for time and p = 0.004 for time and genotype). P-VA, unlike any other SCFA, correlated positively with plasma gamma-glutamyl transferase (r = 0.240, p = 0.025). Total p-BCAAs concentration changed in the AD group comparing PNPLA3 CC and GG genotypes (CC: 612 ± 184 to 532 ± 149 µmol/g and GG: 587 ± 182 to 590 ± 130 µmol/g, p = 0.015 for time). Valine decreased in the RD group (p = 0.009), and leucine decreased in the AD group (p = 0.043). RD decreased total fecal SCFA, acetic acid (f-AA), and butyric acid (f-BA) in those with CC genotype (p = 0.006, 0.013 and 0.005, respectively). Our results suggest that the PNPLA3 genotype modifies the effect of dietary fat modification for p-VA, total f-SCFA, f-AA and f-BA, and total p-BCAA.
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Affiliation(s)
- Milla-Maria Tauriainen
- Department of Medicine, Endoscopy Unit, Kuopio University Hospital, 70029 Kuopio, Finland
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, 70210 Kuopio, Finland (M.L.); (H.E.-N.); (U.S.)
| | - Susanne Csader
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, 70210 Kuopio, Finland (M.L.); (H.E.-N.); (U.S.)
| | - Maria Lankinen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, 70210 Kuopio, Finland (M.L.); (H.E.-N.); (U.S.)
| | - Kwun Kwan Lo
- School of Biological Sciences, University of Hong Kong, Pokfulam, Hong Kong, China; (K.K.L.); (C.C.)
| | - Congjia Chen
- School of Biological Sciences, University of Hong Kong, Pokfulam, Hong Kong, China; (K.K.L.); (C.C.)
| | - Olli Lahtinen
- Diagnostic Imaging Centre, Department of Clinical Radiology, Kuopio University Hospital, 70029 Kuopio, Finland;
| | - Hani El-Nezamy
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, 70210 Kuopio, Finland (M.L.); (H.E.-N.); (U.S.)
- School of Biological Sciences, University of Hong Kong, Pokfulam, Hong Kong, China; (K.K.L.); (C.C.)
| | - Markku Laakso
- Institute of Clinical Medicine, Internal Medicine, University of Eastern Finland, 70211 Kuopio, Finland;
- Department of Medicine, Kuopio University Hospital, 70029 Kuopio, Finland
| | - Ursula Schwab
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, 70210 Kuopio, Finland (M.L.); (H.E.-N.); (U.S.)
- Department of Medicine, Endocrinology and Clinical Nutrition, Kuopio University Hospital, 70029 Kuopio, Finland
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9
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Arjmand S, Biojone C, Wegener G. Modulation of Leucine Sensors to Mitigate Antipsychotics-Induced Metabolic Syndrome: A New Vista. ACS Pharmacol Transl Sci 2024; 7:294-297. [PMID: 38230284 PMCID: PMC10789118 DOI: 10.1021/acsptsci.3c00319] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Indexed: 01/18/2024]
Abstract
Second-generation antipsychotics (SGAs) are currently the mainstay in the pharmacotherapy of some psychiatric disorders, which have improved the quality of life of millions of patients globally. A broad spectrum of activity and diminished liabilities of extrapyramidal side effects have made SGAs better alternatives compared to first-generation antipsychotics. Nevertheless, they display a complex profile of activity by affecting an array of biological targets and, as a result, are associated with a constellation of metabolic abnormalities such as hyperglycemia, dyslipidemia, weight gain, and cardiovascular problems. The SGAs-induced metabolic syndrome's exact mechanism has remained nebulous, but some evidence points the finger at mTOR signaling. In this viewpoint, we propose potential strategies to prevent or alleviate the SGA-induced metabolic adverse effects by modulating the activity of the leucine sensors, Sestrins.
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Affiliation(s)
- Shokouh Arjmand
- Translational
Neuropsychiatry Unit, Department of Clinical Medicine, Aarhus University, Aarhus, 8200, Denmark
| | - Caroline Biojone
- Translational
Neuropsychiatry Unit, Department of Clinical Medicine, Aarhus University, Aarhus, 8200, Denmark
- Department
of Biomedicine, Aarhus University, Aarhus, 8200, Denmark
| | - Gregers Wegener
- Translational
Neuropsychiatry Unit, Department of Clinical Medicine, Aarhus University, Aarhus, 8200, Denmark
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10
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Soares JDP, Siqueira JM, Brito FDSB, Pimentel GD. A Randomized Controlled Trial on the Effects of Leucine-Supplement Combined with Nutritional Counseling on Body Composition in Mix Cancer Older Men. Nutrients 2024; 16:210. [PMID: 38257103 PMCID: PMC10818878 DOI: 10.3390/nu16020210] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/19/2023] [Accepted: 12/20/2023] [Indexed: 01/24/2024] Open
Abstract
BACKGROUND Malnutrition and metabolic alterations of cancer cachexia are often associated with negative weight loss and muscle mass wasting. In this sense, protein supplementation can be a strategy to help counteract the loss and/or maintenance of mass in these patients. The aim of this study was to evaluate the effect of leucine supplementation on body composition in outpatients with gastrointestinal tract cancer. METHODS It was a randomized, blinded, controlled, parallel trial, performed in male patients with a cancer diagnosis of the gastrointestinal tract and appendix organs undergoing chemotherapy. All the patients were allocated to one of the protocol groups: L-leucine supplement or the control group, during 8 weeks of intervention. We evaluated the body composition through bioelectrical impedance analysis, the cancer cachexia classification, and the diet intake before and after the intervention protocol. The intention-to-treat approach was performed to predict the missing values for all patients who provide any observation data. RESULTS The patients were an average age of 65.11 ± 7.50 years old. In the body composition analysis with patients who finished all the supplementation, we observed a significant gain in body weight (61.79.9 ± 9.02 versus 64.06 ± 9.45, p = 0.01), ASMM (7.64 ± 1.24 versus 7.81 ± 1.20, p = 0.02) in the Leucine group, whereas patients in the control did not present significant variation in these parameters. There was no significant intergroup difference. While in the analysis included the patients with intention-to-treat, we found a significant increase in body weight (p = 0.01), BMI (p = 0.01), FFM (p = 0.03), and ASMM (p = 0.01) in the Leucine group. No significant intergroup differences. These results also similar among cachectic patients. CONCLUSION A balanced diet enriched with free-Leucine supplementation was able to promotes gains in body weight and lean mass in older men diagnosticated with gastrointestinal and appendix organs of digestion cancer after 8 weeks. However, the fact that most men are non-cachectic or pre-cachectic is not clear if the increase in muscle mass was due to a high intake of leucine, since no difference between groups was detected. Moreover, we know that benefits on body composition are due to adequate calorie and macronutrients consumption and that balanced feeding according to nutrition Guidelines seems crucial and must be advised during the oncological treatment.
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Affiliation(s)
- Jéssika D. P. Soares
- Faculty of Nutrition, Federal University of Goias, Goiania 74605-080, Brazil; (J.D.P.S.)
| | - Jéssika M. Siqueira
- Faculty of Nutrition, Federal University of Goias, Goiania 74605-080, Brazil; (J.D.P.S.)
| | - Flávia dos S. B. Brito
- Institute of Nutrition, Estadual University of Rio de Janeiro, Rio de Janeiro 20550-900, Brazil;
| | - Gustavo D. Pimentel
- Faculty of Nutrition, Federal University of Goias, Goiania 74605-080, Brazil; (J.D.P.S.)
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11
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Yu H, Niu Y, Lei X, Xie C, Yan X. Multi-Omics Analysis Reveals Sphingomyelin Accumulation, Glycerolipids Loss, and Disorders of Lipid Metabolism Regulated by Leucine Deprivation in the Liver of Mice. Mol Nutr Food Res 2024; 68:e2300567. [PMID: 38059795 DOI: 10.1002/mnfr.202300567] [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: 08/07/2023] [Revised: 09/27/2023] [Indexed: 12/08/2023]
Abstract
SCOPE Branched-chain amino acids, especially leucine, have been reported to play a role in regulating lipid metabolism. This study aims to examine the effects of leucine deprivation on hepatic lipid metabolism. METHODS AND RESULTS C57BL/6 mice are fed with a chow diet (control group, n = 8) or a leucine-free diet (-Leu group, n = 8) for 7 days. Histology, lipidomics, targeted metabolomics, and transcriptomics are performed to analyze the liver tissue. Compared to control group, -Leu group exhibits a notably reduced liver weight, accompanied by hepatic injury, and disorders of lipid metabolism. The level of sphingomyelin (SM) is significantly increased in the liver of -Leu group, while the glycerolipids (GL) level is significantly decreased. The expression of sphingomyelin synthase 1 (SGMS1) is upregulated by leucine deprivation in a time-dependent manner, leading to hepatic SM accumulation. Moreover, leucine deprivation results in hepatic GL loss via suppressing fatty acid synthase (FASN) and acetyl-CoA carboxylase 1 (ACC1) expression. CONCLUSION The findings demonstrate that leucine deprivation results in abnormal lipid metabolism in the liver, mainly manifested as SM accumulation and GL loss. These results provide insights into the role of leucine in regulating lipid metabolism.
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Affiliation(s)
- Haonan Yu
- National Key Laboratory of Agricultural Microbiology, Frontiers Science Center for Animal Breeding and Sustainable Production, Hubei Hongshan Laboratory, College of Animal Sciences and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, 430070, China
- Hubei Provincial Engineering Laboratory for Pig Precision Feeding and Feed Safety Technology, Wuhan, Hubei, 430070, China
| | - Yaorong Niu
- National Key Laboratory of Agricultural Microbiology, Frontiers Science Center for Animal Breeding and Sustainable Production, Hubei Hongshan Laboratory, College of Animal Sciences and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, 430070, China
- Hubei Provincial Engineering Laboratory for Pig Precision Feeding and Feed Safety Technology, Wuhan, Hubei, 430070, China
| | - Xinyu Lei
- National Key Laboratory of Agricultural Microbiology, Frontiers Science Center for Animal Breeding and Sustainable Production, Hubei Hongshan Laboratory, College of Animal Sciences and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, 430070, China
- Hubei Provincial Engineering Laboratory for Pig Precision Feeding and Feed Safety Technology, Wuhan, Hubei, 430070, China
| | - Chunlin Xie
- National Key Laboratory of Livestock and Poultry Breeding, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangzhou, Guangdong, 510640, China
| | - Xianghua Yan
- National Key Laboratory of Agricultural Microbiology, Frontiers Science Center for Animal Breeding and Sustainable Production, Hubei Hongshan Laboratory, College of Animal Sciences and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, 430070, China
- Hubei Provincial Engineering Laboratory for Pig Precision Feeding and Feed Safety Technology, Wuhan, Hubei, 430070, China
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12
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Tessari P. Stepwise Discovery of Insulin Effects on Amino Acid and Protein Metabolism. Nutrients 2023; 16:119. [PMID: 38201949 PMCID: PMC10780923 DOI: 10.3390/nu16010119] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/10/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024] Open
Abstract
A clear effect of insulin deficiency and replacement on body/muscle mass was a landmark observation at the start of the insulin age. Since then, an enormous body of investigations has been produced on the pathophysiology of diabetes mellitus from a hormonal/metabolic point of view. Among them, the study of the effects of insulin on body growth and protein accretion occupies a central place and shows a stepwise, continuous, logical, and creative development. Using a metaphor, insulin may be viewed as a director orchestrating the music (i.e., the metabolic effects) played by the amino acids and proteins. As a hormone, insulin obviously does not provide either energy or substrates by itself. Rather, it tells cells how to produce and utilize them. Although the amino acids can be released and taken up by cells independently of insulin, the latter can powerfully modulate these movements. Insulin regulates (inhibits) protein degradation and, in some instances, stimulates protein synthesis. This review aims to provide a synthetic and historical view of the key steps taken from the discovery of insulin as an "anabolic hormone", to the in-depth analysis of its effects on amino acid metabolism and protein accretions, as well as of its interaction with nutrients.
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Affiliation(s)
- Paolo Tessari
- Department of Medicine, University of Padova, 35128 Padova, Italy
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13
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Rong Y, Darnell AM, Sapp KM, Vander Heiden MG, Spencer SL. Cells use multiple mechanisms for cell-cycle arrest upon withdrawal of individual amino acids. Cell Rep 2023; 42:113539. [PMID: 38070134 DOI: 10.1016/j.celrep.2023.113539] [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: 04/17/2023] [Revised: 09/29/2023] [Accepted: 11/17/2023] [Indexed: 12/30/2023] Open
Abstract
Amino acids are required for cell growth and proliferation, but it remains unclear when and how amino acid availability impinges on the proliferation-quiescence decision. Here, we used time-lapse microscopy and single-cell tracking of cyclin-dependent kinase 2 (CDK2) activity to assess the response of individual cells to withdrawal of single amino acids and found strikingly different cell-cycle effects depending on the amino acid. For example, upon leucine withdrawal, MCF10A cells complete two cell cycles and then enter a CDK2-low quiescence, whereas lysine withdrawal causes immediate cell-cycle stalling. Methionine withdrawal triggers a restriction point phenotype similar to serum starvation or Mek inhibition: upon methionine withdrawal, cells complete their current cell cycle and enter a CDK2-low quiescence after mitosis. Modulation of restriction point regulators p21/p27 or cyclin D1 enables short-term rescue of proliferation under methionine and leucine withdrawal, and to a lesser extent lysine withdrawal, revealing a checkpoint connecting nutrient signaling to cell-cycle entry.
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Affiliation(s)
- Yao Rong
- Department of Molecular, Cellular, and Developmental Biology and BioFrontiers Institute, University of Colorado Boulder, Boulder, CO 80303, USA
| | - Alicia M Darnell
- Koch Institute for Integrative Cancer Research, Cambridge, MA, USA; Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Kiera M Sapp
- Koch Institute for Integrative Cancer Research, Cambridge, MA, USA; Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Matthew G Vander Heiden
- Koch Institute for Integrative Cancer Research, Cambridge, MA, USA; Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Dana-Farber Cancer Institute, Boston, MA 02215, USA; Broad Institute, Cambridge, MA 02139, USA
| | - Sabrina L Spencer
- Department of Biochemistry and BioFrontiers Institute, University of Colorado Boulder, Boulder, CO 80303, USA.
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14
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Ueda H, Hirakawa Y, Miyano T, Nakayama Y, Hatanaka Y, Uchiyama H, Tozuka Y, Kadota K. Improvement in Inhalation Properties of Theophylline and Levofloxacin by Co-Amorphization and Enhancement in Its Stability by Addition of Amino Acid as a Third Component. Mol Pharm 2023; 20:6368-6379. [PMID: 37942959 DOI: 10.1021/acs.molpharmaceut.3c00756] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
Co-amorphous systems are amorphous formulations stabilized by the miscible dispersion of small molecules. This study aimed to design a stable co-amorphous system for the co-delivery of two drugs to the lungs as an inhaled formulation. Theophylline (THE) and levofloxacin (LEV) were used as model drugs for treating lung infection with inflammation. Leucine (LEU) or tryptophan (TRP) was employed as the third component to improve the inhalation properties. The co-amorphous system containing THE and LEV in an equal molar ratio was successfully prepared via spray drying where reduction of the particle size and change to the spherical morphology were observed. The addition of LEU or TRP at a one-tenth molar ratio to THE-LEV did not affect the formation of the co-amorphous system, but only TRP acted as an antiplasticizer. The Fourier transform infrared spectroscopy spectra revealed intermolecular interactions between THE and LEV in the co-amorphous system that were retained after the addition of LEU or TRP. The co-amorphous THE-LEV system exhibited better in vitro aerodynamic performance than a physical mixture of these compounds and permitted the simultaneous delivery of both drugs in various stages. The co-amorphous THE-LEV system crystallized at 40 °C, and this crystallization was not prevented by LEU. However, THE-LEV-TRP maintained its amorphous state for 1 month. Thus, TRP can act as a third component to improve the physical stability of the co-amorphous THE-LEV system, while maintaining the enhanced aerodynamic properties.
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Affiliation(s)
- Hiroshi Ueda
- Analysis and Evaluation Laboratory, Shionogi & Co., Ltd., Osaka 561-0825, Japan
| | - Yuya Hirakawa
- Analysis and Evaluation Laboratory, Shionogi & Co., Ltd., Osaka 561-0825, Japan
| | - Tetsuya Miyano
- Laboratory for Medicinal Chemistry Research, Shionogi & Co., Ltd., Osaka 561-0825, Japan
| | - Yuzuki Nakayama
- Department of Formulation Design and Pharmaceutical Technology, Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, Osaka 569-1094, Japan
| | - Yuta Hatanaka
- Department of Formulation Design and Pharmaceutical Technology, Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, Osaka 569-1094, Japan
| | - Hiromasa Uchiyama
- Department of Formulation Design and Pharmaceutical Technology, Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, Osaka 569-1094, Japan
| | - Yuichi Tozuka
- Department of Formulation Design and Pharmaceutical Technology, Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, Osaka 569-1094, Japan
| | - Kazunori Kadota
- Department of Formulation Design and Pharmaceutical Technology, Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, Osaka 569-1094, Japan
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15
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Lee K, Blanton C. The effect of branched-chain amino acid supplementation on cancer treatment. Nutr Health 2023; 29:621-635. [PMID: 36703299 DOI: 10.1177/02601060231153428] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Background: Anticancer therapies are associated with significant adverse side effects and few treatments that alleviate symptoms exist. Branched-chain amino acids (BCAAs) have been investigated as an intervention for reducing anticancer therapy side effects, although a review of the literature results has yet to be published. Aim: The current review summarizes evidence surrounding this topic and suggests both support and caution in using BCAAs as a treatment for patients receiving anticancer therapies. Methods: In this review, two literature searches were completed. Google Scholar, PubMed, EBSCOhost, and Cochrane databases were searched using the terms "branched-chain amino acids and cancer" and "BCAA and cancer." Results: Two bodies of evidence emerged: One supporting beneficial effects and the other showing adverse outcomes of BCAA supplementation in patients with cancer. Evidence of benefit was a decrease in malnourishment and unintentional weight loss during and after chemotherapy. Potential harms included the idea cancer cells may utilize BCAAs as a source of energy for growth. Conclusions: Supplementation of BCAAs in individuals with cancer should be implemented cautiously. Those who are severely malnourished due to anticancer therapy may benefit the most. BCAA supplementation may also be provided once cancer has been destroyed from the individual's body to aid with recovery.
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Affiliation(s)
- Kassidy Lee
- Department of Nutrition and Dietetics, Idaho State University, Pocatello, ID, USA
| | - Cynthia Blanton
- Department of Nutrition and Dietetics, Idaho State University, Pocatello, ID, USA
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16
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Alves PKN, Schauer A, Augstein A, Männel A, Barthel P, Joachim D, Friedrich J, Prieto ME, Moriscot AS, Linke A, Adams V. Leucine Supplementation Improves Diastolic Function in HFpEF by HDAC4 Inhibition. Cells 2023; 12:2561. [PMID: 37947639 PMCID: PMC10648219 DOI: 10.3390/cells12212561] [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: 09/20/2023] [Revised: 10/24/2023] [Accepted: 10/27/2023] [Indexed: 11/12/2023] Open
Abstract
Heart failure with preserved ejection fraction (HFpEF) is a complex syndrome associated with a high morbidity and mortality rate. Leucine supplementation has been demonstrated to attenuate cardiac dysfunction in animal models of cachexia and heart failure with reduced ejection fraction (HFrEF). So far, no data exist on leucine supplementation on cardiac function in HFpEF. Thus, the current study aimed to investigate the effect of leucine supplementation on myocardial function and key signaling pathways in an established HFpEF rat model. Female ZSF1 rats were randomized into three groups: Control (untreated lean rats), HFpEF (untreated obese rats), and HFpEF_Leu (obese rats receiving standard chow enriched with 3% leucine). Leucine supplementation started at 20 weeks of age after an established HFpEF was confirmed in obese rats. In all animals, cardiac function was assessed by echocardiography at baseline and throughout the experiment. At the age of 32 weeks, hemodynamics were measured invasively, and myocardial tissue was collected for assessment of mitochondrial function and for histological and molecular analyses. Leucine had already improved diastolic function after 4 weeks of treatment. This was accompanied by improved hemodynamics and reduced stiffness, as well as by reduced left ventricular fibrosis and hypertrophy. Cardiac mitochondrial respiratory function was improved by leucine without alteration of the cardiac mitochondrial content. Lastly, leucine supplementation suppressed the expression and nuclear localization of HDAC4 and was associated with Protein kinase A activation. Our data show that leucine supplementation improves diastolic function and decreases remodeling processes in a rat model of HFpEF. Beneficial effects were associated with HDAC4/TGF-β1/Collagenase downregulation and indicate a potential use in the treatment of HFpEF.
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Affiliation(s)
- Paula Ketilly Nascimento Alves
- Laboratory of Experimental and Molecular Cardiology, TU Dresden, Heart Center Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (A.M.); (P.B.); (D.J.); (J.F.); (A.L.)
- Department of Anatomy, Institute of Biomedical Sciences, University of Sao Paulo, São Paulo 05508000, Brazil;
| | - Antje Schauer
- Laboratory of Experimental and Molecular Cardiology, TU Dresden, Heart Center Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (A.M.); (P.B.); (D.J.); (J.F.); (A.L.)
| | - Antje Augstein
- Laboratory of Experimental and Molecular Cardiology, TU Dresden, Heart Center Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (A.M.); (P.B.); (D.J.); (J.F.); (A.L.)
| | - Anita Männel
- Laboratory of Experimental and Molecular Cardiology, TU Dresden, Heart Center Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (A.M.); (P.B.); (D.J.); (J.F.); (A.L.)
| | - Peggy Barthel
- Laboratory of Experimental and Molecular Cardiology, TU Dresden, Heart Center Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (A.M.); (P.B.); (D.J.); (J.F.); (A.L.)
| | - Dirk Joachim
- Laboratory of Experimental and Molecular Cardiology, TU Dresden, Heart Center Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (A.M.); (P.B.); (D.J.); (J.F.); (A.L.)
| | - Janet Friedrich
- Laboratory of Experimental and Molecular Cardiology, TU Dresden, Heart Center Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (A.M.); (P.B.); (D.J.); (J.F.); (A.L.)
| | - Maria-Elisa Prieto
- Laboratory of Experimental and Molecular Cardiology, TU Dresden, Heart Center Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (A.M.); (P.B.); (D.J.); (J.F.); (A.L.)
| | - Anselmo Sigari Moriscot
- Department of Anatomy, Institute of Biomedical Sciences, University of Sao Paulo, São Paulo 05508000, Brazil;
| | - Axel Linke
- Laboratory of Experimental and Molecular Cardiology, TU Dresden, Heart Center Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (A.M.); (P.B.); (D.J.); (J.F.); (A.L.)
| | - Volker Adams
- Laboratory of Experimental and Molecular Cardiology, TU Dresden, Heart Center Dresden, 01307 Dresden, Germany; (P.K.N.A.); (A.S.); (A.A.); (A.M.); (P.B.); (D.J.); (J.F.); (A.L.)
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17
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Zhu S, Xu R, Engel AL, Wang Y, McNeel R, Hurley JB, Chao JR, Du J. Proline provides a nitrogen source in the retinal pigment epithelium to synthesize and export amino acids for the neural retina. J Biol Chem 2023; 299:105275. [PMID: 37741457 PMCID: PMC10616405 DOI: 10.1016/j.jbc.2023.105275] [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: 04/19/2023] [Revised: 09/07/2023] [Accepted: 09/11/2023] [Indexed: 09/25/2023] Open
Abstract
It is known that metabolic defects in the retinal pigment epithelium (RPE) can cause degeneration of its neighboring photoreceptors in the retina, leading to retinal degenerative diseases such as age-related macular degeneration. However, how RPE metabolism supports the health of the neural retina remains unclear. The retina requires exogenous nitrogen sources for protein synthesis, neurotransmission, and energy metabolism. Using 15N tracing coupled with mass spectrometry, we found human RPE can utilize the nitrogen in proline to produce and export 13 amino acids, including glutamate, aspartate, glutamine, alanine, and serine. Similarly, we found this proline nitrogen utilization in the mouse RPE/choroid but not in the neural retina of explant cultures. Coculture of human RPE with the retina showed that the retina can take up the amino acids, especially glutamate, aspartate, and glutamine, generated from proline nitrogen in the RPE. Intravenous delivery of 15N proline in vivo demonstrated 15N-derived amino acids appear earlier in the RPE before the retina. We also found proline dehydrogenase, the key enzyme in proline catabolism is highly enriched in the RPE but not the retina. The deletion of proline dehydrogenase blocks proline nitrogen utilization in RPE and the import of proline nitrogen-derived amino acids in the retina. Our findings highlight the importance of RPE metabolism in supporting nitrogen sources for the retina, providing insight into understanding the mechanisms of the retinal metabolic ecosystem and RPE-initiated retinal degenerative diseases.
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Affiliation(s)
- Siyan Zhu
- Department of Ophthalmology and Visual Sciences, West Virginia University, Morgantown, West Virginia, USA; Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, West Virginia, USA; Department of Pharmaceutical and Pharmacological Sciences, West Virginia University, Morgantown, West Virginia, USA
| | - Rong Xu
- Department of Ophthalmology and Visual Sciences, West Virginia University, Morgantown, West Virginia, USA; Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, West Virginia, USA
| | - Abbi L Engel
- Department of Ophthalmology, University of Washington, Seattle, Washington, USA
| | - Yekai Wang
- Department of Ophthalmology and Visual Sciences, West Virginia University, Morgantown, West Virginia, USA; Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, West Virginia, USA
| | - Rachel McNeel
- Department of Ophthalmology and Visual Sciences, West Virginia University, Morgantown, West Virginia, USA; Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, West Virginia, USA
| | - James B Hurley
- Department of Ophthalmology, University of Washington, Seattle, Washington, USA; Department of Biochemistry, University of Washington, Seattle, Washington, USA
| | - Jennifer R Chao
- Department of Ophthalmology, University of Washington, Seattle, Washington, USA.
| | - Jianhai Du
- Department of Ophthalmology and Visual Sciences, West Virginia University, Morgantown, West Virginia, USA; Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, West Virginia, USA.
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18
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Li P, Wang W, Zhou R, Ding Y, Li X. The m 5 C methyltransferase NSUN2 promotes codon-dependent oncogenic translation by stabilising tRNA in anaplastic thyroid cancer. Clin Transl Med 2023; 13:e1466. [PMID: 37983928 PMCID: PMC10659772 DOI: 10.1002/ctm2.1466] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 04/20/2023] [Revised: 10/15/2023] [Accepted: 10/19/2023] [Indexed: 11/22/2023] Open
Abstract
BACKGROUND Translation dysregulation plays a crucial role in tumourigenesis and cancer progression. Oncogenic translation relies on the stability and availability of tRNAs for protein synthesis, making them potential targets for cancer therapy. METHODS This study performed immunohistochemistry analysis to assess NSUN2 levels in thyroid cancer. Furthermore, to elucidate the impact of NSUN2 on anaplastic thyroid cancer (ATC) malignancy, phenotypic assays were conducted. Drug inhibition and time-dependent plots were employed to analyse drug resistance. Liquid chromatography-mass spectrometry and bisulphite sequencing were used to investigate the m5 C methylation of tRNA at both global and single-base levels. Puromycin intake and high-frequency codon reporter assays verified the protein translation level. By combining mRNA and ribosome profiling, a series of downstream proteins and codon usage bias were identified. The acquired data were further validated by tRNA sequencing. RESULTS This study observed that the tRNA m5 C methyltransferase NSUN2 was up-regulated in ATC and is associated with dedifferentiation. Furthermore, NSUN2 knockdown repressed ATC formation, proliferation, invasion and migration both in vivo and in vitro. Moreover, NSUN2 repression enhanced the sensitivity of ATC to genotoxic drugs. Mechanically, NSUN2 catalyses tRNA structure-related m5 C modification, stabilising tRNA that maintains homeostasis and rapidly transports amino acids, particularly leucine. This stable tRNA has a substantially increased efficiency necessary to support a pro-cancer translation program including c-Myc, BCL2, RAB31, JUNB and TRAF2. Additionally, the NSUN2-mediated variations in m5C levels and different tRNA Leu iso-decoder families, partially contribute to a codon-dependent translation bias. Surprisingly, targeting NSUN2 disrupted the c-Myc to NSUN2 cycle in ATC. CONCLUSIONS This research revealed that a pro-tumour m5C methyltransferase, dynamic tRNA stability regulation and downstream oncogenes, c-Myc, elicits a codon-dependent oncogenic translation network that enhances ATC growth and formation. Furthermore, it provides new opportunities for targeting translation reprogramming in cancer cells.
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Affiliation(s)
- Peng Li
- Department of General SurgeryXiangya HospitalCentral South UniversityChangshaHunanChina
- National Clinical Research Center for Geriatric DisordersXiangya HospitalCentral South UniversityChangshaHunan ProvinceChina
- Department of Hepatobiliary SurgerySichuan Provincial People's HospitalSchool of MedicineUniversity of Electronic Science and Technology of ChinaChengduChina
| | - Wenlong Wang
- Department of General SurgeryXiangya HospitalCentral South UniversityChangshaHunanChina
- National Clinical Research Center for Geriatric DisordersXiangya HospitalCentral South UniversityChangshaHunan ProvinceChina
| | - Ruixin Zhou
- Department of General SurgeryXiangya HospitalCentral South UniversityChangshaHunanChina
| | - Ying Ding
- Department of General SurgeryXiangya HospitalCentral South UniversityChangshaHunanChina
| | - Xinying Li
- Department of General SurgeryXiangya HospitalCentral South UniversityChangshaHunanChina
- National Clinical Research Center for Geriatric DisordersXiangya HospitalCentral South UniversityChangshaHunan ProvinceChina
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19
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Huang J, Li J, Ning Y, Ren Y, Shao Y, Zhang H, Zong X, Shi H. Enhancement of PPARα-Inhibited Leucine Metabolism-Stimulated β-Casein Synthesis and Fatty Acid Synthesis in Primary Bovine Mammary Epithelial Cells. J Agric Food Chem 2023; 71:16184-16193. [PMID: 37853551 DOI: 10.1021/acs.jafc.3c00712] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
Leucine, a kind of branched-chain amino acid, plays a regulatory role in the milk production of mammalian mammary glands, but its regulatory functions and underlying molecular mechanisms remain unknown. This work showed that a leucine-enriched mixture (LEUem) supplementation increased the levels of milk protein and milk fat synthesis in primary bovine mammary epithelial cells (BMECs). RNA-seq of leucine-treated BMECs indicated alterations in lipid metabolism, translation, ribosomal structure and biogenesis, and inflammatory response signaling pathways. Meanwhile, the supplementation of leucine resulted in mTOR activation and increased the expression of BCKDHA, FASN, ACC, and SCD1. Interestingly, the expression of PPARα was independently correlated with the leucine-supplemented dose. PPARα activated by WY-14643 caused significant suppression of lipogenic genes expression. Furthermore, WY-14643 attenuated leucine-induced β-casein synthesis and enhanced the level of BCKDHA expression. Moreover, promoter analysis revealed a peroxisome-proliferator-response element (PPRE) site in the bovine BCKDHA promoter, and WY-14643 promoted the recruitment of PPARα onto the BCKDHA promoter. Together, the present data indicate that leucine promotes the synthesis of β-casein and fatty acid and that PPARα-involved leucine catabolism is the key target.
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Affiliation(s)
- Jiangtao Huang
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Jintao Li
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Yong Ning
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Yalun Ren
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Yuexin Shao
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Huawen Zhang
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Xueyang Zong
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Huaiping Shi
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
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20
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Alwaleedy S, Kabara KB, Karale RR, Kamble S, Al-Hamdani S, Kumbharkhane AC, Sarode AV. Water dynamics on the structural properties of some NSAID's with leucine in the picosecond region using time domain spectroscopy. J Biomol Struct Dyn 2023:1-18. [PMID: 37897192 DOI: 10.1080/07391102.2023.2273987] [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: 07/10/2023] [Accepted: 10/14/2023] [Indexed: 10/29/2023]
Abstract
Concentration-dependent dielectric response for non-steroidal anti-inflammatory drugs (NSAIDs): Aceclofenac (ACF) and Diclofenac (DCF) in the aqueous leucine solution have been reported at different concentrations and temperatures (298.15 K to 283.15 K). The time domain reflectometry technique in the frequency region of 1 GHz to 30 GHz was used for the present study. Complex permittivity (ε*), static dielectric constant (ε), dielectric relaxation time (τ), dipole moment (μ) and Kirkwood correlation factor (g) have been calculated and discussed in terms of the molecular interaction of water and the used drugs. To give more insights into the structural dynamics of drug-induced amino acids, the study includes molar enthalpy of activation (ΔH), entropy of activation (ΔS), and free energy of activation (ΔF). The overall study concludes that the drug (DCF) having a potent inhibitor of cyclooxygenase found a higher static dielectric constant (ε0) than that of the drug (ACF) having more carbon (C), hydrogen (H), and oxygen (O) in the chain, which is more efficient in controlling pain.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Suad Alwaleedy
- School of Physical Sciences, Swami Ramanand Teerth Marathwada University, Nanded, MS, India
- Department of Physics, Taiz University, Yemen
| | - Komal B Kabara
- School of Physical Sciences, Swami Ramanand Teerth Marathwada University, Nanded, MS, India
| | - Ravikant R Karale
- School of Physical Sciences, Swami Ramanand Teerth Marathwada University, Nanded, MS, India
| | - Savita Kamble
- School of Physical Sciences, Swami Ramanand Teerth Marathwada University, Nanded, MS, India
| | - Saeed Al-Hamdani
- School of Physical Sciences, Swami Ramanand Teerth Marathwada University, Nanded, MS, India
| | - Ashok C Kumbharkhane
- School of Physical Sciences, Swami Ramanand Teerth Marathwada University, Nanded, MS, India
| | - Arvind V Sarode
- School of Physical Sciences, Swami Ramanand Teerth Marathwada University, Nanded, MS, India
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21
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Park MK, Hong CP, Kim BS, Lee DY, Kim YS. Integrated-Omics Study on the Transcriptomic and Metabolic Changes of Bacillus licheniformis, a Main Microorganism of Fermented Soybeans, According to Alkaline pH and Osmotic Stress. J Agric Food Chem 2023; 71:14379-14389. [PMID: 37737871 DOI: 10.1021/acs.jafc.3c01900] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
Bacillus licheniformis has been widely utilized in the food industry as well as various agricultural industries. In particular, it is a main microorganism of fermented soybeans. In this study, the changes of the metabolome and transcriptome of B. licheniformis KACC15844, which had been isolated from fermented soybeans, were investigated depending on alkaline pH (BP) and a high salt concentration (BS) using an integrated-omics technology, focusing on leucine metabolism. Overall, carbohydrate (glycolysis, sugar transport, and overflow) and amino acid (proline, glycine betaine, and serine) metabolisms were strongly associated with BS, while fatty acid metabolism, malate utilization, and branched-chain amino acid-derived volatiles were closely related to BP, in both gene and metabolic expressions. In particular, in leucine metabolism, the formation of 3-methylbutanoic acid, which has strong cheesy odor notes, was markedly increased in BP compared to the other samples. This study provided information on how specific culture conditions can affect gene expressions and metabolite formations in B. licheniformis using an integrated-omics approach.
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Affiliation(s)
- Min Kyung Park
- Food Processing Research Group, Korean Food Research Institute, Wanju 55365, Republic of Korea
| | - Chang Pyo Hong
- Theragen Etex Bio Institute, Suwon-si 13488, Republic of Korea
| | - Byoung Sik Kim
- Department of Food Science and Biotechnology, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Do Yup Lee
- Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Young-Suk Kim
- Department of Food Science and Biotechnology, Ewha Womans University, Seoul 03760, Republic of Korea
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22
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Chi OZ, Liu X, Magsino J, Weiss HR. Leucine Reduced Blood-Brain Barrier Disruption and Infarct Size in Early Cerebral Ischemia-Reperfusion. Brain Sci 2023; 13:1372. [PMID: 37891741 PMCID: PMC10605042 DOI: 10.3390/brainsci13101372] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 09/22/2023] [Accepted: 09/25/2023] [Indexed: 10/29/2023] Open
Abstract
A disruption of the blood-brain barrier (BBB) is a crucial pathophysiological change that can impact the outcome of a stroke. Ribosomal protein S6 (S6) and protein kinase B (Akt) play significant roles in early cerebral ischemia-reperfusion injury. Studies have suggested that branched-chain amino acids (BCAAs) may have neuroprotective properties for spinal cord or brain injuries. Therefore, we conducted research to investigate if leucine, one of the BCAAs, could offer neuroprotection and alter BBB disruption, along with its effects on the phosphorylation of S6 and Akt during the early phase of cerebral ischemia-reperfusion, specifically within the thrombolytic therapy time window. In rats, ten min after left middle cerebral artery occlusion (MCAO), 5 µL of 20 mM L-leucine or normal saline was injected into the left lateral ventricle. After two hours of reperfusion following one hour of MCAO, we determined the transfer coefficient (Ki) of 14C-α-aminoisobutyric acid to assess the BBB disruption, infarct size, and phosphorylation of S6 and Akt. Ischemia-reperfusion increased the Ki (+143%, p < 0.001) and the intra-cerebroventricular injection of leucine lowered the Ki in the ischemic-reperfused cortex (-34%, p < 0.001). Leucine reduced the percentage of cortical infarct (-42%, p < 0.0001) out of the total cortical area. Ischemia-reperfusion alone significantly increased the phosphorylation of both S6 and Akt (p < 0.05). However, the administration of leucine had no further effect on the phosphorylation of S6 or Akt in the ischemic-reperfused cortex. This study suggests that an acute increase in leucine levels in the brain during early ischemia-reperfusion within a few hours of stroke may offer neuroprotection, possibly due to reduced BBB disruption being one of the major contributing factors. Leucine did not further increase the already elevated phosphorylation of S6 or Akt by ischemia-reperfusion under the current experimental conditions. Our data warrant further studies on the effects of leucine on neuronal survival and its mechanisms in the later stages of cerebral ischemia-reperfusion.
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Affiliation(s)
- Oak Z. Chi
- Department of Anesthesiology and Perioperative Medicine, Rutgers Robert Wood Johnson Medical School, 125 Paterson Street, Suite 3100, New Brunswick, NJ 08901-1977, USA;
| | - Xia Liu
- Department of Anesthesiology and Perioperative Medicine, Rutgers Robert Wood Johnson Medical School, 125 Paterson Street, Suite 3100, New Brunswick, NJ 08901-1977, USA;
| | - Jedrick Magsino
- Department of Biochemistry and Molecular Biology, Rutgers Robert Wood Johnson Medical School, 675 Hoes Lane West, Piscataway, NJ 08854-8021, USA;
| | - Harvey R. Weiss
- Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, 675 Hoes Lane West, Piscataway, NJ 08854-8021, USA;
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23
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Abstract
Amino acids are indispensable substrates for protein synthesis in all organisms and incorporated into diverse aspects of metabolic physiology and signaling. However, animals lack the ability to synthesize several of them and must acquire these essential amino acids from their diet or perhaps their associated microbial communities. The essential amino acids therefore occupy a unique position in the health of animals and their relationships with microbes. Here we review recent work connecting microbial production and metabolism of essential amino acids to host biology, and the reciprocal impacts of host metabolism of essential amino acids on their associated microbes. We focus on the roles of the branched-chain amino acids (valine, leucine, and isoleucine) and tryptophan on host-microbe communication in the intestine of humans and other vertebrates. We then conclude by highlighting research questions surrounding the less-understood aspects of microbial essential amino acid synthesis in animal hosts.
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Affiliation(s)
- Jessica R McCann
- Department of Molecular Genetics and Microbiology, Duke Microbiome Center, Duke University School of Medicine, Durham, North Carolina, USA; ,
| | - John F Rawls
- Department of Molecular Genetics and Microbiology, Duke Microbiome Center, Duke University School of Medicine, Durham, North Carolina, USA; ,
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24
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Tekwe CD, Luan Y, Meininger CJ, Bazer FW, Wu G. Dietary supplementation with L- leucine reduces nitric oxide synthesis by endothelial cells of rats. Exp Biol Med (Maywood) 2023; 248:1537-1549. [PMID: 37837386 PMCID: PMC10676130 DOI: 10.1177/15353702231199078] [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: 05/27/2023] [Accepted: 07/21/2023] [Indexed: 10/16/2023] Open
Abstract
This study tested the hypothesis that elevated L-leucine concentrations in plasma reduce nitric oxide (NO) synthesis by endothelial cells (ECs) and affect adiposity in obese rats. Beginning at four weeks of age, male Sprague-Dawley rats were fed a casein-based low-fat (LF) or high-fat (HF) diet for 15 weeks. Thereafter, rats in the LF and HF groups were assigned randomly into one of two subgroups (n = 8/subgroup) and received drinking water containing either 1.02% L-alanine (isonitrogenous control) or 1.5% L-leucine for 12 weeks. The energy expenditure of the rats was determined at weeks 0, 6, and 11 of the supplementation period. At the end of the study, an oral glucose tolerance test was performed on all the rats immediately before being euthanized for the collection of tissues. HF feeding reduced (P < 0.001) NO synthesis in ECs by 21% and whole-body insulin sensitivity by 19% but increased (P < 0.001) glutamine:fructose-6-phosphate transaminase (GFAT) activity in ECs by 42%. Oral administration of L-leucine decreased (P < 0.05) NO synthesis in ECs by 14%, increased (P < 0.05) GFAT activity in ECs by 35%, and reduced (P < 0.05) whole-body insulin sensitivity by 14% in rats fed the LF diet but had no effect (P > 0.05) on these variables in rats fed the HF diet. L-Leucine supplementation did not affect (P > 0.05) weight gain, tissue masses (including white adipose tissue, brown adipose tissue, and skeletal muscle), or antioxidative capacity (indicated by ratios of glutathione/glutathione disulfide) in LF- or HF-fed rats and did not worsen (P > 0.05) adiposity, whole-body insulin sensitivity, or metabolic profiles in the plasma of obese rats. These results indicate that high concentrations of L-leucine promote glucosamine synthesis and impair NO production by ECs, possibly contributing to an increased risk of cardiovascular disease in diet-induced obese rats.
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Affiliation(s)
- Carmen D Tekwe
- Department of Animal Science, Texas A&M University, College Station, TX 77843, USA
- Department of Epidemiology and Biostatistics, Texas A&M University, College Station, TX 77843, USA
- Department of Epidemiology and Biostatistics, School of Public Health, Indiana University, Bloomington, IN 47403, USA
| | - Yuanyuan Luan
- Department of Epidemiology and Biostatistics, Texas A&M University, College Station, TX 77843, USA
- Department of Epidemiology and Biostatistics, School of Public Health, Indiana University, Bloomington, IN 47403, USA
| | - Cynthia J Meininger
- Department of Medical Physiology, Texas A&M University, College Station, TX 77843, USA
| | - Fuller W Bazer
- Department of Animal Science, Texas A&M University, College Station, TX 77843, USA
| | - Guoyao Wu
- Department of Animal Science, Texas A&M University, College Station, TX 77843, USA
- Department of Medical Physiology, Texas A&M University, College Station, TX 77843, USA
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25
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Tangeraas T, Kristensen E, Mørkrid L, Elind E, Bliksrud YT, Eide L. Fasting and non-fasting plasma levels of monomethyl branched chain fatty acids: Implications for maple syrup urine disease. JIMD Rep 2023; 64:360-366. [PMID: 37701324 PMCID: PMC10494493 DOI: 10.1002/jmd2.12380] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 06/21/2023] [Accepted: 06/26/2023] [Indexed: 09/14/2023] Open
Abstract
The branched-chain amino acids (BCAA) leucine, valine, and isoleucine provide precursors for monomethyl branched-chain fatty acids (BCFA). Established reference ranges for BCFAs are lacking. In maple syrup urine disease (MSUD), a rare inborn error of BCAA metabolism, the endogen production is impaired and MSUD patients are treated with a low protein (low BCAA) diet. The protein restriction may affect the dietary intake of BCFA, depending on the dietary choices made. Patients with MSUD are prescribed a more or less protein-restricted diet depending on the severity of the disease. The combination of a protein-restricted diet and subsequent impaired endogenous synthesis may render MSUD patients sensitive to BCFA deficiency, with yet unknown implications. To investigate the possibility of lower circulatory BCFA levels in MSUD that favors dietary BCFA supplementation, we first established fasting-state reference ranges for selected BCFAs and saturated/unsaturated fatty acids in plasma. Then, the effect of fasting on BCFA levels was evaluated by comparing the distribution in a fasting versus a non-fasting cohort. To test the hypothesis that BCFA deficiency could contribute to MSUD pathophysiology, we recruited patients with intermittent, intermediate, and classical form of MSUD and analyzed the corresponding BCFA z-scores. None of the BCFA species had |z-scores| > 2 relative to the reference range. Our findings do not support the requirement of BCFA supplementation in MSUD patients. The origin of BCFAs is discussed. Impaired capacity to synthesize BCFA do not manifest as reduced plasma levels in MSUD, suggesting that endogenous synthesis is dispensable for plasma levels.
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Affiliation(s)
- Trine Tangeraas
- Department of Newborn ScreeningOslo University HospitalOsloNorway
| | - Erle Kristensen
- Department of Medical BiochemistryOslo University HospitalOsloNorway
| | - Lars Mørkrid
- Department of Medical BiochemistryOslo University HospitalOsloNorway
- Department of Medical BiochemistryUniversity of OsloOsloNorway
| | - Elisabeth Elind
- Department of Newborn ScreeningOslo University HospitalOsloNorway
| | | | - Lars Eide
- Department of Medical BiochemistryOslo University HospitalOsloNorway
- Department of Medical BiochemistryUniversity of OsloOsloNorway
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Becetti I, Lauze M, Lee H, Bredella MA, Misra M, Singhal V. Changes in Branched-Chain Amino Acids One Year after Sleeve Gastrectomy in Youth with Obesity and Their Association with Changes in Insulin Resistance. Nutrients 2023; 15:3801. [PMID: 37686833 PMCID: PMC10489782 DOI: 10.3390/nu15173801] [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: 08/11/2023] [Revised: 08/25/2023] [Accepted: 08/28/2023] [Indexed: 09/10/2023] Open
Abstract
Adults with obesity have a reduction in branched-chain amino acid (BCAA) levels following metabolic and bariatric surgery (MBS), which is hypothesized to contribute to the metabolic advantages of MBS. We examined this relationship in 62 youth 13-24 years old with severe obesity (47 female) over 12 months. Thirty had sleeve gastrectomy (SG) and 32 were non-surgical controls (NS). We measured fasting insulin, glucose, glycated hemoglobin (HbA1c), isoleucine, leucine, and valine concentrations, and post-prandial insulin and glucose, following a mixed meal tolerance test. Twenty-four-hour food recalls were collected. At baseline, groups did not differ in the intake or the serum levels of BCAAs, HbA1C, HOMA-IR, Matsuda index, insulinogenic index, or oral Disposition index (oDI). Over 12 months, SG vs. NS had greater reductions in serum BCAAs, and SG had significant reductions in BCAA intake. SG vs. NS had greater reductions in HbA1c and HOMA-IR, with increases in the Matsuda index and oDI. In SG, baseline leucine and total BCAA concentrations were negatively correlated with the baseline Matsuda index. Reductions in serum leucine were positively associated with the reductions in HOMA-IR over 12 months. These associations suggest a potential role of BCAA in regulating metabolic health. Reducing dietary intake and serum BCAA concentrations may reduce insulin resistance.
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Affiliation(s)
- Imen Becetti
- Division of Pediatric Endocrinology, Mass General for Children and Harvard Medical School, Boston, MA 02114, USA; (M.M.); (V.S.)
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Meghan Lauze
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Hang Lee
- Biostatistics Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Miriam A. Bredella
- Department of Radiology, Musculoskeletal Imaging and Interventions, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Madhusmita Misra
- Division of Pediatric Endocrinology, Mass General for Children and Harvard Medical School, Boston, MA 02114, USA; (M.M.); (V.S.)
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Vibha Singhal
- Division of Pediatric Endocrinology, Mass General for Children and Harvard Medical School, Boston, MA 02114, USA; (M.M.); (V.S.)
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
- Pediatric Program, MGH Weight Center, Massachusetts General Hospital, Boston, MA 02114, USA
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27
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Wang Y, Wu W, Zhang L, Jiang H, Mei L. Variations in amino acids caused by drought stress mediate the predisposition of Carya cathayensis to Botryosphaeria canker disease. J Exp Bot 2023; 74:4628-4641. [PMID: 37129574 DOI: 10.1093/jxb/erad161] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 04/28/2023] [Indexed: 05/03/2023]
Abstract
Abiotic stresses can affect the outcome of plant-pathogen interactions, mostly by predisposing the host plant to infection; however, the crosstalk between pathogens and plants related to such predisposition remains unclear. Here, we investigated the predisposition of Carya cathayensis to infection by the fungal pathogen Botryosphaeria dothidea (Bd) caused by drought in the host plant. High levels of drought stress resulted in a significant increase in plant susceptibility to Bd. Drought significantly induced the accumulation of H2O2 and the free amino acids Pro, Leu, and Ile, and in the phloem tissues of plants, and decreased the content of non-structural carbohydrates. In vitro assays showed that Bd was sensitive to H2O2; however, Pro played a protective role against exogenous H2O2. Leu, Ile, and Pro induced asexual reproduction of Bd. Our results provide the first analysis of how drought predisposes C. cathayensis to Botrysphaeria canker via amino acid accumulation in the host plant, and we propose a model that integrates the plant-pathogen interactions involved.
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Affiliation(s)
- Yongjun Wang
- College of Forestry and Biotechnology, Zhejiang A&F University, Hangzhou, 311300, Zhejiang, China
| | - Wenbin Wu
- College of Forestry and Biotechnology, Zhejiang A&F University, Hangzhou, 311300, Zhejiang, China
| | - Liqin Zhang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, Huzhou University, Huzhou, 313000, Zhejiang, China
| | - Hong Jiang
- College of Forestry and Biotechnology, Zhejiang A&F University, Hangzhou, 311300, Zhejiang, China
| | - Li Mei
- College of Forestry and Biotechnology, Zhejiang A&F University, Hangzhou, 311300, Zhejiang, China
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28
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Wilkinson K, Koscien CP, Monteyne AJ, Wall BT, Stephens FB. Association of postprandial postexercise muscle protein synthesis rates with dietary leucine: A systematic review. Physiol Rep 2023; 11:e15775. [PMID: 37537134 PMCID: PMC10400406 DOI: 10.14814/phy2.15775] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 06/20/2023] [Accepted: 07/05/2023] [Indexed: 08/05/2023] Open
Abstract
BACKGROUND Dietary protein ingestion augments post (resistance) exercise muscle protein synthesis (MPS) rates. It is thought that the dose of leucine ingested within the protein (leucine threshold hypothesis) and the subsequent plasma leucine variables (leucine trigger hypothesis; peak magnitude, rate of rise, and total availability) determine the magnitude of the postprandial postexercise MPS response. METHODS A quantitative systematic review was performed extracting data from studies that recruited healthy adults, applied a bout of resistance exercise, ingested a bolus of protein within an hour of exercise, and measured plasma leucine concentrations and MPS rates (delta change from basal). RESULTS Ingested leucine dose was associated with the magnitude of the MPS response in older, but not younger, adults over acute (0-2 h, r2 = 0.64, p = 0.02) and the entire postprandial (>2 h, r2 = 0.18, p = 0.01) period. However, no single plasma leucine variable possessed substantial predictive capacity over the magnitude of MPS rates in younger or older adults. CONCLUSION Our data provide support that leucine dose provides predictive capacity over postprandial postexercise MPS responses in older adults. However, no threshold in older adults and no plasma leucine variable was correlated with the magnitude of the postexercise anabolic response.
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Affiliation(s)
- Kiera Wilkinson
- Nutritional Physiology Research Group, Public Health and Sport Sciences, Faculty of Health and Life SciencesUniversity of ExeterExeterUK
| | - Christopher P. Koscien
- Nutritional Physiology Research Group, Public Health and Sport Sciences, Faculty of Health and Life SciencesUniversity of ExeterExeterUK
| | - Alistair J. Monteyne
- Nutritional Physiology Research Group, Public Health and Sport Sciences, Faculty of Health and Life SciencesUniversity of ExeterExeterUK
| | - Benjamin T. Wall
- Nutritional Physiology Research Group, Public Health and Sport Sciences, Faculty of Health and Life SciencesUniversity of ExeterExeterUK
| | - Francis B. Stephens
- Nutritional Physiology Research Group, Public Health and Sport Sciences, Faculty of Health and Life SciencesUniversity of ExeterExeterUK
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Forester SM, Jennings-Dobbs EM, Sathar SA, Layman DK. Perspective: Developing a Nutrient-Based Framework for Protein Quality. J Nutr 2023; 153:2137-2146. [PMID: 37301285 DOI: 10.1016/j.tjnut.2023.06.004] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 05/09/2023] [Accepted: 06/06/2023] [Indexed: 06/12/2023] Open
Abstract
The future of precision nutrition requires treating amino acids as essential nutrients. Currently, recognition of essential amino acid requirements is embedded within a generalized measure of protein quality known as the PDCAAS (Protein Digestibility-Corrected Amino Acid Score). Calculating the PDCAAS includes the FAO/WHO/UNU amino acid score, which is based on the limiting amino acid in a food, that is, the single amino acid with the lowest concentration compared to the reference standard. That "limiting" amino acid score is then multiplied by a bioavailability factor to obtain the PDCAAS, which ranks proteins from 0.0 (poor quality) to 1.0 (high quality). However, the PDCAAS has multiple limitations: it only allows for direct protein quality comparison between 2 proteins, and it is not scalable, transparent, or additive. We therefore propose that shifting the protein quality evaluation paradigm from the current generalized perspective to a precision nutrition focus treating amino acids as unique, metabolically active nutrients will be valuable for multiple areas of science and public health. We report the development and validation of the Essential Amino Acid 9 (EAA-9) score, an innovative, nutrient-based protein quality scoring framework. EAA-9 scores can be used to ensure that dietary recommendations for each essential amino acid are met. The EAA-9 scoring framework also offers the advantages of being additive and, perhaps most importantly, allows for personalization of essential amino acid needs based on age or metabolic conditions. Comparisons of the EAA-9 score with PDCAAS demonstrated the validity of the EAA-9 framework, and practical applications demonstrated that the EAA-9 framework is a powerful tool for precision nutrition applications.
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Affiliation(s)
| | | | | | - Donald K Layman
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL
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30
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Feng D, Yu Y, Liu K, Su Y, Fan T, Guo X, Li M. Effects of dietary leucine on growth, antioxidant capacity, immune response, and inflammation in juvenile yellow catfish Pelteobagrus fulvidraco. Front Physiol 2023; 14:1247410. [PMID: 37565136 PMCID: PMC10410258 DOI: 10.3389/fphys.2023.1247410] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 07/14/2023] [Indexed: 08/12/2023] Open
Abstract
The experiment was conducted to investigate the effects of dietary leucine on growth, antioxidant capacity, immune response, and inflammation in juvenile yellow catfish. Five diets were formulated to contain five dietary leucine levels: 12.00 (control), 19.00, 26.00, 33.00, and 40.00 g kg-1. Each diet was randomly assigned to triplicate groups of 30 juvenile fish (5.02 ± 0.15 g) twice daily to apparent satiation for 56 days. Weight gain rate, specific growth rate, and activities of liver superoxide dismutase, glutathione peroxidase, and serum lysozyme, as well as immunoglobulin M content, significantly increased with increase in dietary leucine levels up to 26.00 g kg-1, but those values decreased significantly with a further increase in dietary leucine. On the contrary, the lowest malondialdehyde content was found in 26.00 and 33.00 g kg-1 leucine groups. The expression levels of IGF 1 and MYF 5 genes in muscle were significantly upregulated with increase in dietary leucine levels up to 26.00 g kg-1, but the expression of MSTN level showed the opposite trend. The lowest expression levels of IL 8 and TNFɑ genes in the liver were found in 26.00 g kg-1 leucine groups. The quadratic regression analysis on weight gain, specific growth rate, and feed conversion ratio against dietary leucine levels indicated that the optimal dietary leucine requirement was estimated to be 26.84-27.00 g kg-1of the dry diet.
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Affiliation(s)
- Dexiang Feng
- School of Fisheries, Xinyang Agriculture and Forestry University, Xinyang, China
| | - Yangping Yu
- School of Marine Sciences, Ningbo University, Ningbo, China
| | - Kaifang Liu
- School of Fisheries, Xinyang Agriculture and Forestry University, Xinyang, China
| | - Yi Su
- School of Fisheries, Xinyang Agriculture and Forestry University, Xinyang, China
| | - Tianyu Fan
- School of Fisheries, Xinyang Agriculture and Forestry University, Xinyang, China
| | - Xusheng Guo
- School of Fisheries, Xinyang Agriculture and Forestry University, Xinyang, China
| | - Ming Li
- School of Marine Sciences, Ningbo University, Ningbo, China
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31
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Abstract
Sarcopenia is a syndrome characterized by a decline in muscular mass, strength, and function with advancing age. The risk of falls, fragility, hospitalization, and death is considerably increased in the senior population due to sarcopenia. Although there is no conclusive evidence for drug treatment, resistance training has been unanimously recognized as a first-line treatment for managing sarcopenia, and numerous studies have also pointed to the combination of nutritional supplementation and resistance training as a more effective intervention to improve quality of life for people with sarcopenia. People with both malnutrition and sarcopenia have a higher mortality rate, so identifying people at risk of malnutrition and intervening early is extremely important to avoid sarcopenia and its associated problems. This article provides important information for dietary interventions in sarcopenia by summarizing the discoveries and developments of nutritional supplements such as protein, leucine, β-hydroxy-β-methylbutyric acid, vitamin D, vitamin C, vitamin E, omega-3 fatty acids, creatine, inorganic nitrate, probiotics, minerals, collagen peptides, and polyphenols in the management of sarcopenia.
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Affiliation(s)
- Simin Liu
- General Practice Ward/International Medical Center Ward, General Practice Medical Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Lin Zhang
- General Practice Ward/International Medical Center Ward, General Practice Medical Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Shuangqing Li
- General Practice Ward/International Medical Center Ward, General Practice Medical Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- National Clinical Research Center for Geriatrics, Multimorbidity Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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32
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Elango R. Tolerable Upper Intake Level for Individual Amino Acids in Humans: A Narrative Review of Recent Clinical Studies. Adv Nutr 2023; 14:885-894. [PMID: 37062432 PMCID: PMC10334138 DOI: 10.1016/j.advnut.2023.04.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 04/18/2023] Open
Abstract
Individual amino acids are widely popular as supplements because of various perceived and real health benefits. However, currently, there are no recommendations set by national health agencies for tolerable upper intake levels (UL) for amino acids because of a lack of well-conducted human dose-response trials. In the past decade, under the initiative of the International Council on Amino Acid Science, a nonprofit organization, a series of UL human clinical studies were conducted. The goal of this narrative review is to summarize the studies on 6 essential amino acids (leucine, tryptophan, methionine, lysine, histidine, and phenylalanine), 2 nonessential amino acids (arginine and serine), and 2 nonproteinogenic amino acids (ornithine and citrulline) and provide the first set of ULs. A brief background of the concept of the DRI framework of UL, the concept of UL for amino acids, and a perspective of the results are also provided. The data suggest that in relatively healthy adult individuals, the tested amino acids are well tolerated, and ULs, or the no-observed-adverse-effect-level (NOAEL), lowest-observed-adverse-effect-level (LOAEL), can be determined. The ULs were for leucine-young (35 g/d), tryptophan (4.5 g/d), and leucine-elderly (30 g/d); NOAEL and LOAEL for methionine at 3.2 and 6.4 g/d, respectively; NOAEL for arginine (30 g/d); NOAEL and LOAEL for lysine at 6 and 7.5 g/d, respectively; NOAEL and LOAEL for histidine at 8 and 12 g/d, respectively; and NOAEL for phenylalanine (12 g/d), serine (12 g/d), ornithine (12 g/d) and citrulline (24 g/d). This first set of human UL data are hoped to help national and international agencies set safety standards for supplemental amino acids.
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Affiliation(s)
- Rajavel Elango
- Department of Pediatrics, University of British Columbia, British Columbia, Canada; British Columbia Children's Hospital Research Institute, British Columbia Children's Hospital, Vancouver, British Columbia, Canada; School of Population and Public Health, University of British Columbia, British Columbia, Canada.
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Boscarino G, Carducci C, Conti MG, Podagrosi M, Gigliello A, Di Chiara M, Bartolucci M, Brunelli R, Parisi P, Angeloni A, Terrin G. Early Energy Intake and Amino Acid Profile in Preterm Newborns: A Quasi-Experimental Study. Nutrients 2023; 15:2917. [PMID: 37447243 PMCID: PMC10343583 DOI: 10.3390/nu15132917] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 06/23/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023] Open
Abstract
(1) Background: An increased protein intake via parenteral nutrition (PN) in early life is associated with an improvement of the nitrogen balance in preterm newborns. However, the role of energy intake on amino acid (AA) utilization provided by PN remains to be defined. We investigated the effects of energy intake on blood AA levels and profiles. (2) Methods: Quasi-experimental study including preterm very low birth weight newborns who received an energy enhanced PN (Cohort A) or an energy standard PN (Cohort B), with a similar protein amount in the first week of life. Blood AA levels were measured between three and seven days of life (T0) and at fifteen days of life (T1) and compared between the two study cohorts. (3) Results: AA levels of 40 newborns from each group were analyzed. No difference was found for total essential and non-essential blood AA concentration at T0 between the two study cohorts. At T1, we found a significantly higher blood concentration of leucine, isoleucine and proline, and a significantly lower concentration of tyrosine in Cohort B. However, multivariate analysis did not confirm this result. (4) Conclusions: An enhanced PN protocol in terms of energy but not of protein did not influence AA levels and profiles. Considering the high risk of side effects, we suggest exercising caution when administering high energy intake via PN in the first week of life.
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Affiliation(s)
- Giovanni Boscarino
- Department of Maternal and Child Health, Policlinico Umberto I, Sapienza University of Rome, 00161 Rome, Italy (R.B.)
| | - Claudia Carducci
- Department of Experimental Medicine, Policlinico Umberto I, Sapienza University of Rome, 00185 Rome, Italy
| | - Maria Giulia Conti
- Department of Maternal and Child Health, Policlinico Umberto I, Sapienza University of Rome, 00161 Rome, Italy (R.B.)
| | - Maria Podagrosi
- Department of Maternal and Child Health, Policlinico Umberto I, Sapienza University of Rome, 00161 Rome, Italy (R.B.)
| | - Annamaria Gigliello
- Department of Experimental Medicine, Policlinico Umberto I, Sapienza University of Rome, 00185 Rome, Italy
| | - Maria Di Chiara
- Department of Maternal and Child Health, Policlinico Umberto I, Sapienza University of Rome, 00161 Rome, Italy (R.B.)
| | - Monica Bartolucci
- Department of Maternal and Child Health, Policlinico Umberto I, Sapienza University of Rome, 00161 Rome, Italy (R.B.)
| | - Roberto Brunelli
- Department of Maternal and Child Health, Policlinico Umberto I, Sapienza University of Rome, 00161 Rome, Italy (R.B.)
| | - Pasquale Parisi
- Department of Neuroscience, Mental Health and Sense Organs (NESMOS), Faculty of Medicine and Psychology, Sant Andrea Hospital University, Sapienza University of Rome, 00189 Rome, Italy
| | - Antonio Angeloni
- Department of Experimental Medicine, Policlinico Umberto I, Sapienza University of Rome, 00185 Rome, Italy
| | - Gianluca Terrin
- Department of Maternal and Child Health, Policlinico Umberto I, Sapienza University of Rome, 00161 Rome, Italy (R.B.)
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Jiménez-Alonso JJ, López-Lázaro M. Dietary Manipulation of Amino Acids for Cancer Therapy. Nutrients 2023; 15:2879. [PMID: 37447206 DOI: 10.3390/nu15132879] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/20/2023] [Accepted: 06/22/2023] [Indexed: 07/15/2023] Open
Abstract
Cancer cells cannot proliferate and survive unless they obtain sufficient levels of the 20 proteinogenic amino acids (AAs). Unlike normal cells, cancer cells have genetic and metabolic alterations that may limit their capacity to obtain adequate levels of the 20 AAs in challenging metabolic environments. However, since normal diets provide all AAs at relatively constant levels and ratios, these potentially lethal genetic and metabolic defects are eventually harmless to cancer cells. If we temporarily replace the normal diet of cancer patients with artificial diets in which the levels of specific AAs are manipulated, cancer cells may be unable to proliferate and survive. This article reviews in vivo studies that have evaluated the antitumor activity of diets restricted in or supplemented with the 20 proteinogenic AAs, individually and in combination. It also reviews our recent studies that show that manipulating the levels of several AAs simultaneously can lead to marked survival improvements in mice with metastatic cancers.
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Affiliation(s)
| | - Miguel López-Lázaro
- Department of Pharmacology, Faculty of Pharmacy, University of Seville, 41012 Sevilla, Spain
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35
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Li Y, Sarma AA, Lee IT, Tan FH, Abrams MJ, Condiotte ZJ, Heithe M, Raffiee M, Dabiri JO, Gold DA, Goentoro L. Response to comment on 'A conserved strategy for inducing appendage regeneration in moon jellyfish, Drosophila, and mice'. eLife 2023; 12:e85370. [PMID: 37347515 DOI: 10.7554/elife.85370] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 06/08/2023] [Indexed: 06/23/2023] Open
Abstract
Previously we reported evidence that a regenerative response in the appendages of moon jellyfish, fruit flies, and mice can be promoted by nutrient modulation (Abrams et al., 2021). Sustar and Tuthill subsequently reported that they had not been able to reproduce the induced regenerative response in flies (Sustar and Tuthill, 2023). Here we discuss that differences in the amputation method, treatment concentrations, age of the animals, and stress management explain why they did not observe a regenerative response in flies. Typically, 30-50% of treated flies showed response in our assay.
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Affiliation(s)
- Yutian Li
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States
| | - Anish A Sarma
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States
| | - Iris T Lee
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States
| | - Fayth Hui Tan
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States
| | - Michael J Abrams
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States
| | - Zevin J Condiotte
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States
| | - Martin Heithe
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States
| | - Misha Raffiee
- Graduate Aerospace Laboratories and Mechanical Engineering, California Institute of Technology, Pasadena, United States
| | - John O Dabiri
- Graduate Aerospace Laboratories and Mechanical Engineering, California Institute of Technology, Pasadena, United States
| | - David A Gold
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States
| | - Lea Goentoro
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States
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36
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Rivera CN, Smith CE, Draper LV, Ochoa GE, Watne RM, Wommack AJ, Vaughan RA. The Selective LAT1 Inhibitor JPH203 Enhances Mitochondrial Metabolism and Content in Insulin-Sensitive and Insulin-Resistant C2C12 Myotubes. Metabolites 2023; 13:766. [PMID: 37367923 DOI: 10.3390/metabo13060766] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/09/2023] [Accepted: 06/13/2023] [Indexed: 06/28/2023] Open
Abstract
Population data have shown an association between higher circulating branched-chain amino acids (BCAA) and the severity of insulin resistance in people with diabetes. While several studies have assessed BCAA metabolism as a potential target for regulation, less attention has been paid to the role of L-type amino acid transporter 1 (LAT1), the primary transporter of BCAA in skeletal muscle. The aim of this study was to assess the impact of JPH203 (JPH), a LAT1 inhibitor, on myotube metabolism in both insulin-sensitive and insulin-resistant myotubes. C2C12 myotubes were treated with or without 1 μM or 2 μM JPH for 24 h with or without insulin resistance. Western blot and qRT-PCR were used to assess protein content and gene expression, respectively. Mitochondrial and glycolytic metabolism were measured via Seahorse Assay, and fluorescent staining was used to measure mitochondrial content. BCAA media content was quantified using liquid chromatography-mass spectrometry. JPH at 1 μM (but not 2 μM) increased mitochondrial metabolism and content without inducing changes in mRNA expression of transcripts associated with mitochondrial biogenesis or mitochondrial dynamics. Along with increased mitochondrial function, 1μM treatment also reduced extracellular leucine and valine. JPH at 2 μM reduced pAkt signaling and increased extracellular accumulation of isoleucine without inducing changes in BCAA metabolic genes. Collectively, JPH may increase mitochondrial function independent of the mitochondrial biogenic transcription pathway; however, high doses may reduce insulin signaling.
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Affiliation(s)
- Caroline N Rivera
- Department of Exercise Science, High Point University, High Point, NC 27268, USA
| | - Carly E Smith
- Department of Exercise Science, High Point University, High Point, NC 27268, USA
| | - Lillian V Draper
- Department of Exercise Science, High Point University, High Point, NC 27268, USA
| | - Gabriela E Ochoa
- Department of Exercise Science, High Point University, High Point, NC 27268, USA
| | - Rachel M Watne
- Department of Chemistry, High Point University, High Point, NC 27268, USA
| | - Andrew J Wommack
- Department of Chemistry, High Point University, High Point, NC 27268, USA
| | - Roger A Vaughan
- Department of Exercise Science, High Point University, High Point, NC 27268, USA
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37
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Herrera-Martínez AD, León Idougourram S, Muñoz Jiménez C, Rodríguez-Alonso R, Alonso Echague R, Chica Palomino S, Sanz Sanz A, Manzano García G, Gálvez Moreno MÁ, Calañas Continente A, Molina Puertas MJ. Standard Hypercaloric, Hyperproteic vs. Leucine-Enriched Oral Supplements in Patients with Cancer-Induced Sarcopenia, a Randomized Clinical Trial. Nutrients 2023; 15:2726. [PMID: 37375630 DOI: 10.3390/nu15122726] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 05/31/2023] [Accepted: 06/08/2023] [Indexed: 06/29/2023] Open
Abstract
(1) Background: Malnutrition frequently affects patients with cancer, and it negatively impacts treatment tolerance, clinical outcomes and survival. Thus, appropriate nutritional screening and early nutrition support are extremely recommended. Currently, a significant number of oral supplements (OS) are commercially available; despite this, there is a lack of evidence for recommending specific OS, including leucine-enriched OS, for nutritional support in patients with cancer. (2) Aim: To compare the clinical evolution of patients with cancer (undergoing systemic treatment) that received standard hypercaloric, whey protein-based hyperproteic oral supplements vs. hypercaloric, hyperproteic leucine-enriched OS using a novel morphofunctional nutritional evaluation. (3) Patients and methods: This paper details an open-label, controlled clinical study in which patients were randomly assigned to receive nutritional treatment with whey protein-based hyperproteic oral supplements (control group) vs. hypercaloric, hyperproteic leucine-enriched OS (intervention group) during a twelve-week period. Forty-six patients were included; epidemiological, clinical, anthropometric, ultrasound (muscle echography of the rectus femoris muscle of the quadriceps and abdominal adipose tissue) and biochemical evaluation were performed. All patients received additional supplementation with vitamin D. (4) Results: Nutritional parameters (including bioimpedance, anthropometric, ultrasound and biochemical variables) of all included patients remained stable after the nutritional intervention. Extracellular mass tended to increase in the patients that received the leucine-enriched formula. Functionality (evaluated through the stand-up test) improved in both groups (p < 0.001). Prealbumin, transferrin levels and superficial adipose tissue increased in the control group (p < 0.05), while self-reported quality of life improved in all the evaluated patients (p < 0.001). (5) Conclusions: Nutritional support with hypercaloric, hyperproteic (with whey protein) OS and vitamin D supplementation were associated with the maintenance of body composition and improvements in functionality and in quality of life in the patients with cancer undergoing systemic treatment. No significant benefits were observed when a leucine-enriched formula was used.
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Affiliation(s)
- Aura D Herrera-Martínez
- Maimonides Institute for Biomedical Research of Cordoba (IMIBIC), 14004 Cordoba, Spain
- Endocrinology and Nutrition Service, Reina Sofia University Hospital, 14004 Cordoba, Spain
| | - Soraya León Idougourram
- Maimonides Institute for Biomedical Research of Cordoba (IMIBIC), 14004 Cordoba, Spain
- Endocrinology and Nutrition Service, Reina Sofia University Hospital, 14004 Cordoba, Spain
| | - Concepción Muñoz Jiménez
- Maimonides Institute for Biomedical Research of Cordoba (IMIBIC), 14004 Cordoba, Spain
- Endocrinology and Nutrition Service, Reina Sofia University Hospital, 14004 Cordoba, Spain
| | - Rosa Rodríguez-Alonso
- Maimonides Institute for Biomedical Research of Cordoba (IMIBIC), 14004 Cordoba, Spain
- Medical Oncology Service, Reina Sofia University Hospital, 14004 Cordoba, Spain
| | - Rosario Alonso Echague
- Maimonides Institute for Biomedical Research of Cordoba (IMIBIC), 14004 Cordoba, Spain
- General Surgery Service, Reina Sofia University Hospital, 14004 Cordoba, Spain
| | - Sonia Chica Palomino
- Maimonides Institute for Biomedical Research of Cordoba (IMIBIC), 14004 Cordoba, Spain
- Endocrinology and Nutrition Service, Reina Sofia University Hospital, 14004 Cordoba, Spain
| | - Ana Sanz Sanz
- Maimonides Institute for Biomedical Research of Cordoba (IMIBIC), 14004 Cordoba, Spain
- Endocrinology and Nutrition Service, Reina Sofia University Hospital, 14004 Cordoba, Spain
| | - Gregorio Manzano García
- Maimonides Institute for Biomedical Research of Cordoba (IMIBIC), 14004 Cordoba, Spain
- Endocrinology and Nutrition Service, Reina Sofia University Hospital, 14004 Cordoba, Spain
| | - María Ángeles Gálvez Moreno
- Maimonides Institute for Biomedical Research of Cordoba (IMIBIC), 14004 Cordoba, Spain
- Endocrinology and Nutrition Service, Reina Sofia University Hospital, 14004 Cordoba, Spain
| | - Alfonso Calañas Continente
- Maimonides Institute for Biomedical Research of Cordoba (IMIBIC), 14004 Cordoba, Spain
- Endocrinology and Nutrition Service, Reina Sofia University Hospital, 14004 Cordoba, Spain
| | - María José Molina Puertas
- Maimonides Institute for Biomedical Research of Cordoba (IMIBIC), 14004 Cordoba, Spain
- Endocrinology and Nutrition Service, Reina Sofia University Hospital, 14004 Cordoba, Spain
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38
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Ahmed S, Mansour M, Ishak RAH, Mortada ND. Customizable Resveratrol Spray-dried Micro-composites for Inhalation as a Promising Contender for Treatment of Idiopathic Pulmonary Fibrosis. Int J Pharm 2023:123117. [PMID: 37315636 DOI: 10.1016/j.ijpharm.2023.123117] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 05/11/2023] [Revised: 06/05/2023] [Accepted: 06/06/2023] [Indexed: 06/16/2023]
Abstract
The past decades have witnessed tremendous expansion in utilization of plant-derived medicines as resveratrol (RES) in treating several diseases like idiopathic pulmonary fibrosis (IPF). RES can exhibit its role in treating IPF via its outstanding antioxidant and anti-inflammatory activities. The goal of this work was to formulate RES-loaded spray-dried composite microparticles (SDCMs) suitable for pulmonary delivery via dry powder inhaler (DPI). They were prepared by spray drying of a previously prepared RES-loaded bovine serum albumin nanoparticles (BSA NPs) dispersion using different carriers. RES-loaded BSA NPs, prepared by the desolvation technique, acquired suitable particle size of 177.67±0.95 nm and entrapment efficiency of 98.7±0.35% with perfectly uniform size distribution and high stability. Considering the attributes of the pulmonary route, NPs were co-spray dried with compatible carriers viz. mannitol, dextran, trehalose, leucine, glycine, aspartic acid, and glutamic acid to fabricate SDCMs. All formulations showed suitable mass median aerodynamic diameter less than 5 µm; that is suitable for deep lung deposition. However, the best aerosolization behavior was attained from using leucine with fine particle fraction (FPF) of 75.74%, followed by glycine with FPF of 54.7%. Finally, a pharmacodynamic study was conducted on bleomycin-induced mice, and it strongly revealed the role of the optimized formulations in alleviating PF through suppressing the levels of hydroxyproline, tumor necrosis factor-α and matrix metalloproteinase-9 with obvious improvements in the treated lung histopathology. These findings indicate that in addition to leucine, the glycine amino acid, which is not commonly used yet, is very promising in the formulation of DPIs.
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Affiliation(s)
- Sara Ahmed
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Postal Code 11566, Cairo, Egypt
| | - Mai Mansour
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Postal Code 11566, Cairo, Egypt
| | - Rania A H Ishak
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Postal Code 11566, Cairo, Egypt.
| | - Nahed D Mortada
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Postal Code 11566, Cairo, Egypt
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39
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Ispoglou T, Ferentinos P, Prokopidis K, Blake C, Aldrich L, Elia A, Lees M, Hind K. Exploring the impact of exercise and essential amino acid plus cholecalciferol supplementation on physical fitness and body composition in multiple sclerosis: A case study. Clin Case Rep 2023; 11:e7548. [PMID: 37323260 PMCID: PMC10264925 DOI: 10.1002/ccr3.7548] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 05/24/2023] [Accepted: 05/31/2023] [Indexed: 06/17/2023] Open
Abstract
Key Clinical Message In MS patients, especially those frail or malnourished, combining home-based exercise twice weekly with essential amino acids and vitamin D may improve body composition, strength, and physical performance, enabling long-term functional improvements. Abstract Multiple sclerosis (MS) is associated with reduced bone and muscle strength and function. We aimed to investigate the effectiveness of a 24-week intervention in a 57-year-old frail female with MS. The participant completed a 2×/week exercise intervention and ingested 2×/day a supplement containing 7.5 g essential amino acids and 500 IU cholecalciferol. Body composition, 6-m gait speed (GS), handgrip strength (HGS), 30-sec arm-curl test (30ACT), 6-min walking test (6MWT), 30-sec chair-stand test (30CST), and plasma concentrations of 25-hydroxyvitamin D3 [25(OH)D3], insulin-like growth factor 1 (IGF-1), and amino acids were assessed at baseline, and at Weeks 12 and 24. Plasma 25(OH)D3 increased from 23.2 to 41.3 ng/mL and IGF-1 from 131.6 to 140.7 ng/mL from baseline to post-intervention. BMI, total lean tissue mass (LTM), fat mass, bone mineral content, and the sum of 17 amino acids increased by 3.8, 1.0, 3.5, 0.2, and 19%, respectively, at Week 24. There were clinically significant increases in regional LTM (6.9% arms and 6.3% legs) and large increases in GS (67.3%), dominant HGS (31.5%), non-dominant HGS (11.8%), dominant 30ACT (100%), non-dominant 30ACT (116.7%), 6MWT (125.6%), and 30CST (44.4%). The current intervention was effective in improving components of physical fitness and body composition in a female with MS.
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Affiliation(s)
| | | | | | - Cameron Blake
- Carnegie School of SportLeeds Beckett UniversityLeedsUK
| | - Luke Aldrich
- Carnegie School of SportLeeds Beckett UniversityLeedsUK
| | - Antonis Elia
- Division of Environmental PhysiologyRoyal Institute of TechnologyStockholmSweden
| | - Matthew Lees
- Faculty of Kinesiology and Physical EducationUniversity of TorontoTorontoOntarioCanada
| | - Karen Hind
- Wolfson Research Institute for Health and Well‐beingDurhamUK
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Sekine M, Koh I, Nakamoto K, Nosaka S, Tomono K, Sugimoto J, Kudo Y. Selective Inhibition of L-type Amino Acid Transporter 1 Suppresses Cell Proliferation in Ovarian Clear Cell Carcinoma. Anticancer Res 2023; 43:2509-2517. [PMID: 37247931 DOI: 10.21873/anticanres.16418] [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: 03/12/2023] [Revised: 03/26/2023] [Accepted: 03/27/2023] [Indexed: 05/31/2023]
Abstract
BACKGROUND/AIM Ovarian clear cell carcinoma (OCCC) is a histological type of ovarian cancer that is refractory to chemotherapy and has poor prognosis, which necessitates the development of novel treatment therapies. In this study, we focused on L-type amino acid transporter 1 (LAT1), which is involved in cancer growth, and investigated the effect of its selective inhibition on cell proliferation in OCCC. MATERIALS AND METHODS The inhibitory effect of nanvuranlat (JPH203), a LAT1 selective inhibitor, on the cellular uptake of [3H] leucine was evaluated using the OCCC cell line JHOC9, which expresses the LAT1 protein. In addition, the kinetics of cell proliferation and changes in phosphorylation of the mTOR pathway were analyzed. The correlation between LAT1 expression and progression-free survival (PFS) was evaluated using clinical specimens of OCCC. RESULTS Nanvuranlat inhibited [3H] leucine intracellular uptake and cell proliferation in a dose-dependent manner in JHOC9 cells. In addition, it suppressed the activity of the mTOR signaling pathway, which is thought to inhibit cancer cell proliferation. LAT1 expression was most frequent in OCCC among clinical specimens of epithelial ovarian cancer. A correlation between LAT1 expression and PFS was observed in OCCC. CONCLUSION LAT1 selective inhibition suppresses cell proliferation via the mTOR pathway by inhibiting leucine uptake in OCCC. This study illustrates the potential of using LAT1 selective inhibition as a treatment strategy for OCCC.
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Affiliation(s)
- Masaki Sekine
- Department of Obstetrics and Gynecology, Faculty of Medicine Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Iemasa Koh
- Department of Obstetrics and Gynecology, Faculty of Medicine Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kosuke Nakamoto
- Department of Obstetrics and Gynecology, Faculty of Medicine Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Suguru Nosaka
- Department of Obstetrics and Gynecology, Faculty of Medicine Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Katsuyuki Tomono
- Department of Obstetrics and Gynecology, Faculty of Medicine Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Jun Sugimoto
- Department of Obstetrics and Gynecology, Faculty of Medicine Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yoshiki Kudo
- Department of Obstetrics and Gynecology, Faculty of Medicine Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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Dijk FJ, Hofman Z, Luiking YC, Furber MJW, Roberts JD, van Helvoort A, van Dijk M. Muscle Protein Synthesis with a Hybrid Dairy and Plant-Based Protein Blend (P4) Is Equal to Whey Protein in a Murine Ageing Model after Fasting. Nutrients 2023; 15:nu15112569. [PMID: 37299532 DOI: 10.3390/nu15112569] [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: 05/03/2023] [Revised: 05/23/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023] Open
Abstract
P4, a specific combination of dairy proteins (whey and casein) and plant-based protein isolates (pea and soy), has been shown to provide a more balanced amino acid (AA) profile than its single constituent proteins; however, less is known about how this translates to muscle protein synthesis (MPS). The aim of this study was to investigate the effect of P4 compared to whey or casein against fasted control on MPS. C57BL/6J mice, aged 25 months, were fasted overnight, followed by oral gavage of either whey, P4, casein, or water as a fasted control. Thirty minutes after ingestion, puromycin (0.04 µmol∙g-1 bodyweight) was subcutaneously injected; 30-min thereafter, mice were sacrificed. MPS was measured by the SUnSET method, and signalling proteins were determined in the left-tibialis anterior (TA) muscle by the WES technique. AA composition was determined in plasma and right-TA muscle. Dried blood spots (DBS) were analysed for postprandial AA dynamics at 10, 20, 45, 60 min. MPS was 1.6-fold increased with whey (p = 0.006) and 1.5-fold with P4 compared to fasted (p = 0.008), while no change was seen with casein. This was confirmed by a significant increase of phosphorylated/total ratio of 4E-BP1 for both whey (p = 0.012) and P4 (p = 0.001). No changes were observed in p70S6K and mTOR phosphorylation/total ratio with whey or P4. Intramuscular leucine levels were lower for P4 (0.71 µmol∙g dry weight-1) compared to whey (0.97 µmol∙g dry weight-1) (p = 0.0007). Ten minutes postprandial, DBS showed significantly increased blood AA levels of BCAAs, histidine, lysine, threonine, arginine, and tyrosine for P4 versus fasted. In conclusion, a hybrid mix of dairy and plant-based proteins (P4) resulted in a MPS response that was similar to whey protein in aged mice after fasting. This suggests that other anabolic triggers beyond leucine or the well-balanced amino acid profile and bioavailability of the blend benefit stimulation of MPS.
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Affiliation(s)
| | - Zandrie Hofman
- Danone Nutricia Research, 3584 CT Utrecht, The Netherlands
| | | | | | - Justin D Roberts
- Danone Nutricia Research, 3584 CT Utrecht, The Netherlands
- Cambridge Centre for Sport and Exercise Sciences, Anglia Ruskin University, Cambridge CB1 1PT, UK
| | - Ardy van Helvoort
- Danone Nutricia Research, 3584 CT Utrecht, The Netherlands
- NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, 6211 LK Maastricht, The Netherlands
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Jackman SR, Wallis GA, Yu J, Philp A, Baar K, Tipton KD, Witard OC. Co-Ingestion of Branched-Chain Amino Acids and Carbohydrate Stimulates Myofibrillar Protein Synthesis Following Resistance Exercise in Trained Young Men. Int J Sport Nutr Exerc Metab 2023:1-9. [PMID: 37225168 DOI: 10.1123/ijsnem.2023-0015] [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: 01/28/2023] [Revised: 04/05/2023] [Accepted: 04/07/2023] [Indexed: 05/26/2023]
Abstract
Branched-chain amino acids (BCAA) and carbohydrate (CHO) are commonly recommended postexercise supplements. However, no study has examined the interaction of CHO and BCAA ingestion on myofibrillar protein synthesis (MyoPS) rates following exercise. We aimed to determine the response of MyoPS to the co-ingestion of BCAA and CHO following an acute bout of resistance exercise. Ten resistance-trained young men completed two trials in counterbalanced order, ingesting isocaloric drinks containing either 30.6-g CHO plus 5.6-g BCAA (B + C) or 34.7-g CHO alone following a bout of unilateral, leg resistance exercise. MyoPS was measured postexercise with a primed, constant infusion of L-[ring13C6] phenylalanine and collection of muscle biopsies pre- and 4 hr postdrink ingestion. Blood samples were collected at time points before and after drink ingestion. Serum insulin concentrations increased to a similar extent in both trials (p > .05), peaking at 30 min postdrink ingestion. Plasma leucine (514 ± 34 nmol/L), isoleucine (282 ± 23 nmol/L), and valine (687 ± 33 nmol/L) concentrations peaked at 0.5 hr postdrink in B + C and remained elevated for 3 hr during exercise recovery. MyoPS was ∼15% greater (95% confidence interval [-0.002, 0.028], p = .039, Cohen's d = 0.63) in B + C (0.128%/hr ± 0.011%/hr) than CHO alone (0.115%/hr ± 0.011%/hr) over the 4 hr postexercise period. Co-ingestion of BCAA and CHO augments the acute response of MyoPS to resistance exercise in trained young males.
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Affiliation(s)
- Sarah R Jackman
- Public Health and Sport Sciences, University of Exeter Medical School, Faculty of Health and Life Sciences, University of Exeter, Exeter,United Kingdom
| | - Gareth A Wallis
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham,United Kingdom
| | - Jinglei Yu
- School of Biosciences, University of Birmingham, Birmingham,United Kingdom
| | - Andrew Philp
- Centre for Healthy Ageing, Centenary Institute, Sydney, NSW,Australia
| | - Keith Baar
- Department of Neurobiology, Physiology and Behavior, University of California, Davis, CA,USA
| | - Kevin D Tipton
- Institute for Performance Nutrition, Edinburgh,Scotland
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool,United Kingdom
| | - Oliver C Witard
- Centre for Human and Applied Physiological Sciences, Faculty of Life Sciences and Medicine, King's College London, London,United Kingdom
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Nakajima H, Okada H, Kobayashi A, Takahashi F, Okamura T, Hashimoto Y, Nakanishi N, Senmaru T, Ushigome E, Hamaguchi M, Fukui M. Leucine and Glutamic Acid as a Biomarker of Sarcopenic Risk in Japanese People with Type 2 Diabetes. Nutrients 2023; 15:nu15102400. [PMID: 37242283 DOI: 10.3390/nu15102400] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 05/15/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023] Open
Abstract
This study aimed to identify the serum metabolites associated with sarcopenic risk in Japanese patients with type 2 diabetes, determine the effect of dietary protein intake on the serum metabolic profile, and examine its association with sarcopenia. Ninety-nine Japanese patients with type 2 diabetes were included, and sarcopenic risk was defined as low muscle mass or strength. Seventeen serum metabolites were quantified after gas chromatography-mass spectrometry analysis. The relationship between dietary protein intake and the metabolites concerning sarcopenia was analyzed, and the factors affecting sarcopenic risk were clarified. Twenty-seven patients were classified as being at risk of sarcopenia, the same as the general risk, which was associated with older age, a longer duration of the disease, and a lower body mass index. Low levels of leucine and glutamic acid were significantly associated with low muscle strength (p = 0.002 and p < 0.001, respectively), and leucine was also associated with muscle mass (p = 0.001). Lower levels of glutamic acid had higher odds of sarcopenic risk after being adjusted for age and HbA1c (adjusted OR 4.27, 95% CI 1.07-17.11, p = 0.041), but not for leucine. Leucine and glutamic acid can serve as useful biomarkers for sarcopenia, highlighting potential targets for its prevention.
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Affiliation(s)
- Hanako Nakajima
- Department of Endocrinology and Metabolism, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan
| | - Hiroshi Okada
- Department of Endocrinology and Metabolism, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan
| | - Ayaka Kobayashi
- Department of Endocrinology and Metabolism, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan
| | - Fuyuko Takahashi
- Nutrition Division, Saiseikai Suita Hospital, Osaka 564-0013, Japan
| | - Takuro Okamura
- Department of Endocrinology and Metabolism, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan
| | - Yoshitaka Hashimoto
- Department of Diabetes and Endocrinology, Matsushita Memorial Hospital, Osaka 570-8540, Japan
| | - Naoko Nakanishi
- Department of Endocrinology and Metabolism, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan
| | - Takafumi Senmaru
- Department of Endocrinology and Metabolism, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan
| | - Emi Ushigome
- Department of Endocrinology and Metabolism, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan
| | - Masahide Hamaguchi
- Department of Endocrinology and Metabolism, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan
| | - Michiaki Fukui
- Department of Endocrinology and Metabolism, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan
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Ford S, Ilgaz F, Hawker S, Cochrane B, Hill M, Ellerton C, MacDonald A. Amino Acid Analyses of Plant Foods Used in the Dietary Management of Inherited Amino Acid Disorders. Nutrients 2023; 15:nu15102387. [PMID: 37242270 DOI: 10.3390/nu15102387] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/09/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
A low amino acid (AA)/protein diet is the principal treatment for many inherited amino acid disorders (IMDs). Due to their low AA content, plant foods constitute an essential part of diet therapy. However, data on their AA composition are limited, which leads to an estimation of AA intake from protein content rather than an accurate calculation of true AA intake. This study describes the AA content of a total of 73 plant foods (fruits, n = 12; vegetables, n = 51; and other plant foods, n = 10), with the analysis commissioned by the UK National Society for Phenylketonuria (NSPKU) over 15 years. For all fruits and some vegetables (e.g., rocket, watercress and pea shoots), raw samples were used during analysis. All other vegetables were cooked prior to analysis to represent the usual condition of the food at the time of serving. AA analysis was performed with ion exchange chromatography. The median percentage of protein was 2.0% [0.6-5.4%] for the fruits and vegetables analysed (n = 56), although higher in vegetables than in fruits. Each of the five reported AAs (leucine, lysine, phenylalanine, tyrosine, and methionine) supplied 1-5% per g of protein content. From the heterogeneous range of plant foods analysed, the AA/protein ratios differed significantly (2-5% in fruits and 1-9% in vegetables). There was a strong correlation between the amounts of each of the five AAs in the plant foods, but only a small, moderate correlation between the protein and AA content. Overall, this study provides data on the AA content of several plant foods, which are suitable for patients treated with a low AA/protein diet, including many novel plant options. However, only a limited range of fruits and vegetables were analysed due to the high costs of analysis. Hence, more extensive studies with an increased number of plant foods prepared by different cooking methods and replicate samples are necessary, particularly to examine the relationship between the protein and AA content in depth.
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Affiliation(s)
- Suzanne Ford
- National Society for Phenylketonuria (NSPKU), Sheffield S12 9ET, UK
- Southmead Hospital North Bristol Trust, Bristol BS10 5NB, UK
| | - Fatma Ilgaz
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Hacettepe University, Ankara 06100, Turkey
| | | | - Barbara Cochrane
- NHS Greater Glasgow and Clyde, Royal Hospital for Children, Glasgow G51 4TF, UK
| | - Melanie Hill
- Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield S5 7AU, UK
| | - Charlotte Ellerton
- University College London Hospitals NHS Foundation Trust, London WC1N 3BG, UK
| | - Anita MacDonald
- Birmingham Children's Hospital, Steelhouse Lane, Birmingham B4 6NH, UK
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Wetzel TJ, Erfan SC, Figueroa LD, Wheeler LM, Ananieva EA. Crosstalk between arginine, glutamine, and the branched chain amino acid metabolism in the tumor microenvironment. Front Oncol 2023; 13:1186539. [PMID: 37274280 PMCID: PMC10235471 DOI: 10.3389/fonc.2023.1186539] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 05/03/2023] [Indexed: 06/06/2023] Open
Abstract
Arginine, glutamine, and the branched chain amino acids (BCAAs) are a focus of increased interest in the field of oncology due to their importance in the metabolic reprogramming of cancer cells. In the tumor microenvironment (TME), these amino acids serve to support the elevated biosynthetic and energy demands of cancer cells, while simultaneously maintaining the growth, homeostasis, and effector function of tumor-infiltrating immune cells. To escape immune destruction, cancer cells utilize a variety of mechanisms to suppress the cytotoxic activity of effector T cells, facilitating T cell exhaustion. One such mechanism is the ability of cancer cells to overexpress metabolic enzymes specializing in the catabolism of arginine, glutamine, and the BCAAs in the TME. The action of such enzymes supplies cancer cells with metabolic intermediates that feed into the TCA cycle, supporting energy generation, or providing precursors for purine, pyrimidine, and polyamine biosynthesis. Armed with substantial metabolic flexibility, cancer cells redirect amino acids from the TME for their own advantage and growth, while leaving the local infiltrating effector T cells deprived of essential nutrients. This review addresses the metabolic pressure that cancer cells exert over immune cells in the TME by up-regulating amino acid metabolism, while discussing opportunities for targeting amino acid metabolism for therapeutic intervention. Special emphasis is given to the crosstalk between arginine, glutamine, and BCAA metabolism in affording cancer cells with metabolic dominance in the TME.
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Jo A, Park H, Lee S, Lee KG. Improvement of Robusta coffee aroma with l- leucine powder. J Sci Food Agric 2023; 103:3501-3509. [PMID: 36740875 DOI: 10.1002/jsfa.12485] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 02/01/2023] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND l-Leucine powder (LP) was added to green Robusta coffee beans in order to reduce the difference in flavour between Robusta and Arabica coffee. l-Leucine was selected as an additive based on the Maillard reaction. The pre-treatment method conducted in this study was a short soaking (M1) or spraying procedure (M2), then LP was added at varying levels up to 3% (w/w, 30 g kg-1 ). All samples were roasted (240 °C for 15 min) and extracted using an espresso machine. Volatile compounds were analysed by solid-phase microextraction-gas chromatography-mass selective detection. RESULTS Thirty volatile compounds (six pyrroles, eight pyrazines, three phenols, nine furans, two ketones, two aldehydes) were analysed. In 15 coffee samples, the levels of total volatile compounds (based on peak area ratios) ranged from 8.9 (M1-1) to 15. Non-treated Robusta had higher levels of bitter aroma compounds than Arabica coffee, and Robusta coffee had lower levels of bitter aroma compounds when pre-treated with LP. The sum of bitter volatiles (phenols, pyrroles, pyrazines) was lowest in M1-5 (3% LP), M2-1 (1% LP; both dried at 50 °C for 15 min) and M2-7 (3% LP, dried at 70 °C for 15 min) compared with non-treated Robusta (P < 0.05). CONCLUSION From the results of this study it can be shown that pre-treatment with LP can improve the flavour of Robusta. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Ara Jo
- Department of Food Science and Biotechnology, Dongguk University-Seoul, Goyang-si, Republic of Korea
| | - Hyunbeen Park
- Department of Food Science and Biotechnology, Dongguk University-Seoul, Goyang-si, Republic of Korea
| | - Seongho Lee
- Department of Food Science and Biotechnology, Dongguk University-Seoul, Goyang-si, Republic of Korea
| | - Kwang-Geun Lee
- Department of Food Science and Biotechnology, Dongguk University-Seoul, Goyang-si, Republic of Korea
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Paulussen KJ, Barnes TM, Askow AT, Salvador AF, McKenna CF, Scaroni SE, Fliflet A, Ulanov AV, Li Z, West DW, Bauer LL, Paluska SA, Dilger RN, Moore DR, Boppart MD, Burd NA. Underpinning the Food Matrix Regulation of Postexercise Myofibrillar Protein Synthesis by Comparing Salmon Ingestion With the Sum of Its Isolated Nutrients in Healthy Young Adults. J Nutr 2023; 153:1359-1372. [PMID: 36870539 DOI: 10.1016/j.tjnut.2023.02.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/28/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
BACKGROUND Protein is most commonly consumed as whole foods as opposed to single nutrients. However, the food matrix regulation of the postprandial muscle protein synthetic response has received little attention. OBJECTIVES The purpose of this study was to assess the effects of eating salmon (SAL) and of ingesting the same nutrients as an isolated mixture of crystalline amino acids and fish oil (ISO) on the stimulation of postexercise myofibrillar protein synthesis (MPS) and whole-body leucine oxidation rates in healthy young adults. METHODS Ten recreationally active adults (24 ± 4 y; 5 men, 5 women) performed an acute bout of resistance exercise, followed by the ingestion of SAL or ISO in a crossover fashion. Blood, breath, and muscle biopsies were collected at rest and after exercise during primed continuous infusions of L-[ring-2H5]phenylalanine and L-[1-13C]leucine. All data are presented as means ± SD and/or mean differences (95% CIs). RESULTS Postprandial essential amino acid (EAA) concentrations peaked earlier (P = 0.024) in the ISO group than those in the SAL group. Postprandial leucine oxidation rates increased over time (P < 0.001) and peaked earlier in the ISO group (1.239 ± 0.321 nmol/kg/min; 63 ± 25 min) than those in the SAL group (1.230 ± 0.561 nmol/kg/min; 105 ± 20 min; P = 0.003). MPS rates for SAL (0.056 ± 0.022 %/h; P = 0.001) and ISO (0.046 ± 0.025 %/h; P = 0.025) were greater than the basal rates (0.020 ± 0.011 %/h) during the 0- to 5-h recovery period, with no differences between conditions (P = 0.308). CONCLUSION We showed that the postexercise ingestion of SAL or ISO stimulate postexercise MPS rates with no differences between the conditions. Thus, our results indicate that ingesting protein from SAL as a whole-food matrix is similarly anabolic to ISO in healthy young adults. This trial was registered at www. CLINICALTRIALS gov as NCT03870165.
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Affiliation(s)
- Kevin Jm Paulussen
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Takeshi M Barnes
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Andrew T Askow
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Amadeo F Salvador
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Colleen F McKenna
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Susannah E Scaroni
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Alexander Fliflet
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Alexander V Ulanov
- Roy J. Carver Biotechnology Center, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Zhong Li
- Roy J. Carver Biotechnology Center, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Daniel Wd West
- Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, Ontario, Canada; KITE Research, Toronto Rehabilitation Institute, University of Toronto, Toronto, Ontario, Canada
| | - Laura L Bauer
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Scott A Paluska
- Department of Family Medicine, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Ryan N Dilger
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States; Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States; Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Daniel R Moore
- Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, Ontario, Canada
| | - Marni D Boppart
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States; Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Nicholas A Burd
- Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Urbana, IL, United States; Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States.
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Jagadish A, Sclater K, Lapinski T, Adkins K, Selzer L. A Unique Presentation of 3-Methylcrotonyl-CoA Carboxylase Deficiency. Cureus 2023; 15:e39401. [PMID: 37362523 PMCID: PMC10287026 DOI: 10.7759/cureus.39401] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/09/2023] [Indexed: 06/28/2023] Open
Abstract
3-methylcrotonyl-CoA carboxylase deficiency is an autosomal recessive disorder resulting in impaired leucine metabolism. The condition is typically diagnosed with newborn screening; patients diagnosed at a later stage generally present with symptoms including metabolic disturbances, seizures, failure to thrive, or delayed development. We present the case of a child diagnosed at 12 months of age who was noted to have recurrent viral infections and nonspecific gastrointestinal symptoms of vomiting, hematochezia, and gaseous distention of the abdomen. Newborn screening did not reveal any abnormalities. Evaluation for underlying immunodeficiency was unremarkable; genetic testing revealed bi-allelic mutations in MCCC2, a known association of 3-methylcrotonyl-CoA carboxylase deficiency. It is important to consider genetic disorders when evaluating patients even if the newborn screening is unremarkable.
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Affiliation(s)
- Ashwin Jagadish
- Pediatrics, East Tennessee State University James H. Quillen College of Medicine, Johnson City, USA
| | - Kaitlin Sclater
- Pediatrics, East Tennessee State University James H. Quillen College of Medicine, Johnson City, USA
| | - Taylor Lapinski
- Pediatrics, East Tennessee State University James H. Quillen College of Medicine, Johnson City, USA
| | - Karen Adkins
- Pediatrics, East Tennessee State University James H. Quillen College of Medicine, Johnson City, USA
| | - Lauren Selzer
- Pediatrics, East Tennessee State University James H. Quillen College of Medicine, Johnson City, USA
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Zhu S, Xu R, Engel AL, Wang Y, McNeel R, Hurley JB, Chao JR, Du J. Proline provides a nitrogen source in the retinal pigment epithelium to synthesize and export amino acids for the neural retina. bioRxiv 2023:2023.04.18.537355. [PMID: 37131780 PMCID: PMC10153141 DOI: 10.1101/2023.04.18.537355] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
It is known that metabolic defects in the retinal pigment epithelium (RPE) can cause degeneration of its neighboring photoreceptors in the retina, leading to retinal degenerative diseases such as age-related macular degeneration. However, how RPE metabolism supports the health of the neural retina remains unclear. The retina requires exogenous nitrogen sources for protein synthesis, neurotransmission, and energy metabolism. Using 15N tracing coupled with mass spectrometry, we found human RPE can utilize the nitrogen in proline to produce and export 13 amino acids, including glutamate, aspartate, glutamine, alanine and serine. Similarly, we found this proline nitrogen utilization in the mouse RPE/choroid but not in the neural retina of explant cultures. Co-culture of human RPE with the retina showed that the retina can take up the amino acids, especially glutamate, aspartate and glutamine, generated from proline nitrogen in the RPE. Intravenous delivery of 15N proline in vivo demonstrated 15N-derived amino acids appear earlier in the RPE before the retina. We also found proline dehydrogenase (PRODH), the key enzyme in proline catabolism is highly enriched in the RPE but not the retina. The deletion of PRODH blocks proline nitrogen utilization in RPE and the import of proline nitrogen-derived amino acids in the retina. Our findings highlight the importance of RPE metabolism in supporting nitrogen sources for the retina, providing insight into understanding the mechanisms of the retinal metabolic ecosystem and RPE-initiated retinal degenerative diseases.
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Affiliation(s)
- Siyan Zhu
- Department of Ophthalmology and Visual Sciences, West Virginia University, Morgantown, WV 26506
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506
- Department of Pharmaceutical and Pharmacological Sciences, West Virginia University, Morgantown, WV 26506
| | - Rong Xu
- Department of Ophthalmology and Visual Sciences, West Virginia University, Morgantown, WV 26506
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506
| | - Abbi L. Engel
- Department of Ophthalmology, University of Washington, Seattle, WA 98109
| | - Yekai Wang
- Department of Ophthalmology and Visual Sciences, West Virginia University, Morgantown, WV 26506
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506
| | - Rachel McNeel
- Department of Ophthalmology and Visual Sciences, West Virginia University, Morgantown, WV 26506
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506
| | - James B. Hurley
- Department of Ophthalmology, University of Washington, Seattle, WA 98109
- Department of Biochemistry, University of Washington, Seattle, WA 98109
| | - Jennifer R. Chao
- Department of Ophthalmology, University of Washington, Seattle, WA 98109
| | - Jianhai Du
- Department of Ophthalmology and Visual Sciences, West Virginia University, Morgantown, WV 26506
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506
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Zhao J, Zhao Y, Liu H, Cao Q, Feng L, Zhang Z, Jiang W, Wu P, Liu Y, Luo W, Huang X, Jiang J. Dietary Leucine Improves Fish Intestinal Barrier Function by Increasing Humoral Immunity, Antioxidant Capacity, and Tight Junction. Int J Mol Sci 2023; 24. [PMID: 36902147 DOI: 10.3390/ijms24054716] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 02/13/2023] [Accepted: 02/24/2023] [Indexed: 03/05/2023] Open
Abstract
This study attempted to evaluate the possible impact and mechanism of leucine (Leu) on fish intestinal barrier function. One hundred and five hybrid Pelteobagrus vachelli ♀ × Leiocassis longirostris ♂ catfish were fed with six diets in graded levels of Leu 10.0 (control group), 15.0, 20.0, 25.0, 30.0, 35.0, and 40.0 g/kg diet for 56 days. Results showed that the intestinal activities of LZM, ACP, and AKP and contents of C3, C4, and IgM had positive linear and/or quadratic responses to dietary Leu levels. The mRNA expressions of itnl1, itnl2, c-LZM, g-LZM, and β-defensin increased linearly and/or quadratically (p < 0.05). The ROS, PC, and MDA contents had a negative linear and/or quadratic response, but GSH content and ASA, AHR, T-SOD, and GR activities had positive quadratic responses to dietary Leu levels (p < 0.05). No significant differences on the CAT and GPX activities were detected among treatments (p > 0.05). Increasing dietary Leu level linearly and/or quadratically increased the mRNA expressions of CuZnSOD, CAT, and GPX1α. The GST mRNA expression decreased linearly while the GCLC and Nrf2 mRNA expressions were not significantly affected by different dietary Leu levels. The Nrf2 protein level quadratically increased, whereas the Keap1 mRNA expression and protein level decreased quadratically (p < 0.05). The translational levels of ZO-1 and occludin increased linearly. No significant differences were indicated in Claudin-2 mRNA expression and protein level. The transcriptional levels of Beclin1, ULK1b, ATG5, ATG7, ATG9a, ATG4b, LC3b, and P62 and translational levels of ULK1, LC3Ⅱ/Ⅰ, and P62 linearly and quadratically decreased. The Beclin1 protein level was quadratically decreased with increasing dietary Leu levels. These results suggested that dietary Leu could improve fish intestinal barrier function by increasing humoral immunity, antioxidative capacities, and tight junction protein levels.
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