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Azarin K, Usatov A, Minkina T, Duplii N, Fedorenko A, Plotnikov A, Mandzhieva S, Kumar R, Yong JWH, Sehar S, Rajput VD. Evaluating the phytotoxicological effects of bulk and nano forms of zinc oxide on cellular respiration-related indices and differential gene expression in Hordeum vulgare L. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 282:116670. [PMID: 38981388 DOI: 10.1016/j.ecoenv.2024.116670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 06/26/2024] [Accepted: 06/28/2024] [Indexed: 07/11/2024]
Abstract
The increasing use of nanoparticles is driving the growth of research on their effects on living organisms. However, studies on the effects of nanoparticles on cellular respiration are still limited. The remodeling of cellular-respiration-related indices in plants induced by zinc oxide nanoparticles (nnZnO) and its bulk form (blZnO) was investigated for the first time. For this purpose, barley (Hordeum vulgare L.) seedlings were grown hydroponically for one week with the addition of test compounds at concentrations of 0, 0.3, 2, and 10 mg mL-1. The results showed that a low concentration (0.3 mg mL-1) of blZnO did not cause significant changes in the respiration efficiency, ATP content, and total reactive oxygen species (ROS) content in leaf tissues. Moreover, a dose of 0.3 mg mL-1 nnZnO increased respiration efficiency in both leaves (17 %) and roots (38 %). Under the influence of blZnO and nnZnO at medium (2 mg mL-1) and high (10 mg mL-1) concentrations, a dose-dependent decrease in respiration efficiency from 28 % to 87 % was observed. Moreover, the negative effect was greater under the influence of nnZnO. The gene transcription of the subunits of the mitochondria electron transport chain (ETC) changed mainly only under the influence of nnZnO in high concentration. Expression of the ATPase subunit gene, atp1, increased slightly (by 36 %) in leaf tissue under the influence of medium and high concentrations of test compounds, whereas in the root tissues, the atp1 mRNA level decreased significantly (1.6-2.9 times) in all treatments. A dramatic decrease (1.5-2.4 times) in ATP content was also detected in the roots. Against the background of overexpression of the AOX1d1 gene, an isoform of alternative oxidase (AOX), the total ROS content in leaves decreased (with the exception of 10 mg mL-1 nnZnO). However, in the roots, where the pressure of the stress factor is higher, there was a significant increase in ROS levels, with a maximum six-fold increase under 10 mg mL-1 nnZnO. A significant decrease in transcript levels of the pentose phosphate pathway and glycolytic enzymes was also shown in the root tissues compared to leaves. Thus, the disruption of oxidative phosphorylation leads to a decrease in ATP synthesis and an increase in ROS production; concomitantly reducing the efficiency of cellular respiration.
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Affiliation(s)
- Kirill Azarin
- Southern Federal University, Rostov-on-Don 344090, the Russian Federation
| | - Alexander Usatov
- Southern Federal University, Rostov-on-Don 344090, the Russian Federation
| | - Tatiana Minkina
- Southern Federal University, Rostov-on-Don 344090, the Russian Federation
| | - Nadezhda Duplii
- Southern Federal University, Rostov-on-Don 344090, the Russian Federation
| | - Aleksei Fedorenko
- Southern Federal University, Rostov-on-Don 344090, the Russian Federation
| | - Andrey Plotnikov
- Southern Federal University, Rostov-on-Don 344090, the Russian Federation
| | - Saglara Mandzhieva
- Southern Federal University, Rostov-on-Don 344090, the Russian Federation
| | - Rahul Kumar
- Chitkara Centre for Research and Development, Chitkara University, Himachal Pradesh 174103, India
| | - Jean Wan Hong Yong
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Alnarp 23456, Sweden.
| | - Shafaque Sehar
- Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China.
| | - Vishnu D Rajput
- Southern Federal University, Rostov-on-Don 344090, the Russian Federation.
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Joshi H, Harter K, Rohr L, Mishra SK, Chauhan PS. Elucidation of PGPR-responsive OsNAM2 regulates salt tolerance in Arabidopsis by AFP2 and SUS protein interaction. Microbiol Res 2024; 289:127890. [PMID: 39243685 DOI: 10.1016/j.micres.2024.127890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2024] [Revised: 08/12/2024] [Accepted: 08/28/2024] [Indexed: 09/09/2024]
Abstract
This study investigates the molecular mechanisms underlying salt stress responses in plants, focusing on the regulatory roles of OsNAM2, a gene influenced by the plant growth-promoting rhizobacterium Bacillus amyloliquefaciens (SN13). The study examines how SN13-modulated OsNAM2 enhances salt tolerance in Arabidopsis through physiological, biochemical, and molecular analyses. Overexpression of OsNAM2, especially with SN13 inoculation, improves germination, seedling growth, root length, and biomass under high NaCl concentrations compared to wild-type plants, indicating a synergistic effect. OsNAM2 overexpression enhances relative water content, reduces electrolyte leakage and malondialdehyde accumulation, and increases proline content, suggesting better membrane integrity and stress endurance. Furthermore, SN13 and OsNAM2 overexpression modulates essential metabolic genes involved in glycolysis, the pentose phosphate pathway, and the tricarboxylic acid cycle, facilitating metabolic adjustments crucial for salt stress adaptation. The interaction of OsNAM2 with SUS, facilitated by SN13, suggests enhanced sucrose metabolism efficiency, providing substrates for protective responses. Additionally, OsNAM2 plays a regulatory role in the ABA signaling pathway through significant protein-protein interactions like with AFP2. This study highlights the intricate interplay between SN13-responsive OsNAM2 and key signaling pathways, suggesting strategies for enhancing crop salt tolerance through targeted genetic and microbial interventions.
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Affiliation(s)
- Harshita Joshi
- Microbial Technologies Division, Council of Scientific and Industrial Research-National Botanical Research Institute (CSIR-NBRI), Rana Pratap Marg, Lucknow 226001, India; Department of Botany, University of Lucknow, Lucknow 226007, India
| | - Klaus Harter
- The Center for Plant Molecular Biology (ZMBP), University of Tübingen, Tübingen 72076, Germany
| | - Leander Rohr
- The Center for Plant Molecular Biology (ZMBP), University of Tübingen, Tübingen 72076, Germany
| | - Shashank Kumar Mishra
- Microbial Technologies Division, Council of Scientific and Industrial Research-National Botanical Research Institute (CSIR-NBRI), Rana Pratap Marg, Lucknow 226001, India
| | - Puneet Singh Chauhan
- Microbial Technologies Division, Council of Scientific and Industrial Research-National Botanical Research Institute (CSIR-NBRI), Rana Pratap Marg, Lucknow 226001, India.
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Gundogan K, Nellis MM, Ozer NT, Ergul SS, Sahin GG, Temel S, Yuksel RC, Teeny S, Alvarez JA, Sungur M, Jones DP, Ziegler TR. High-resolution plasma metabolomics and thiamine status in critically Ill adult patients. Metabolomics 2024; 20:83. [PMID: 39066851 PMCID: PMC11283406 DOI: 10.1007/s11306-024-02144-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Accepted: 06/24/2024] [Indexed: 07/30/2024]
Abstract
INTRODUCTION Thiamine (Vitamin B1) is an essential micronutrient and is classically considered a co-factor in energy metabolism. The association between thiamine status and whole-body metabolism in critical illness has not been studied. OBJECTIVES To determine association between whole blood thiamine pyrophosphate (TPP) concentrations and plasma metabolites and connected metabolic pathways using high resolution metabolomics (HRM) in critically ill patients. METHODS Cross-sectional study performed at Erciyes University Hospital, Kayseri, Turkey and Emory University, Atlanta, GA, USA. Participants were critically ill adults with an expected length of intensive care unit stay longer than 48 h and receiving chronic furosemide therapy. A total of 76 participants were included. Mean age was 69 years (range 33-92 years); 65% were female. Blood for TPP and metabolomics was obtained on the day of ICU admission. Whole blood TPP was measured by HPLC and plasma HRM was performed using liquid chromatography/mass spectrometry. Data was analyzed using regression analysis of TPP levels against all plasma metabolomic features in metabolome-wide association studies (MWAS). MWAS using the highest and lowest TPP concentration tertiles was performed as a secondary analysis. RESULTS Specific metabolic pathways associated with whole blood TPP levels in regression and tertile analysis included pentose phosphate, fructose and mannose, branched chain amino acid, arginine and proline, linoleate, and butanoate pathways. CONCLUSIONS Plasma HRM revealed that thiamine status, determined by whole blood TPP concentrations, was significantly associated with metabolites and metabolic pathways related to metabolism of energy, carbohydrates, amino acids, lipids, and the gut microbiome in adult critically ill patients.
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Affiliation(s)
- Kursat Gundogan
- Division of Intensive Care Medicine, Department of Internal Medicine, Erciyes University School of Medicine, Melikgazi, 38039, Kayseri, Turkey.
- Division of Clinical Nutrition, Erciyes University Health Sciences Institute, Kayseri, Turkey.
| | - Mary M Nellis
- Clinical Biomarkers Laboratory, Department of Medicine, Emory University, Atlanta, GA, 30322, USA
| | - Nurhayat T Ozer
- Division of Clinical Nutrition, Erciyes University Health Sciences Institute, Kayseri, Turkey
| | - Serap S Ergul
- Division of Clinical Nutrition, Erciyes University Health Sciences Institute, Kayseri, Turkey
| | - Gulsah G Sahin
- Division of Clinical Nutrition, Erciyes University Health Sciences Institute, Kayseri, Turkey
| | - Sahin Temel
- Division of Intensive Care Medicine, Department of Internal Medicine, Erciyes University School of Medicine, Melikgazi, 38039, Kayseri, Turkey
| | - Recep C Yuksel
- Division of Intensive Care Medicine, Department of Internal Medicine, Erciyes University School of Medicine, Melikgazi, 38039, Kayseri, Turkey
| | - Sami Teeny
- Clinical Biomarkers Laboratory, Department of Medicine, Emory University, Atlanta, GA, 30322, USA
| | - Jessica A Alvarez
- Division of Endocrinology, Metabolism, and Lipids, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA
- Department of Medicine, Emory Center for Clinical and Molecular Nutrition, Emory University School of Medicine, Atlanta, GA, USA
| | - Murat Sungur
- Division of Intensive Care Medicine, Department of Internal Medicine, Erciyes University School of Medicine, Melikgazi, 38039, Kayseri, Turkey
- Division of Clinical Nutrition, Erciyes University Health Sciences Institute, Kayseri, Turkey
| | - Dean P Jones
- Clinical Biomarkers Laboratory, Department of Medicine, Emory University, Atlanta, GA, 30322, USA
- Department of Medicine, Emory Center for Clinical and Molecular Nutrition, Emory University School of Medicine, Atlanta, GA, USA
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA
| | - Thomas R Ziegler
- Division of Endocrinology, Metabolism, and Lipids, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA
- Department of Medicine, Emory Center for Clinical and Molecular Nutrition, Emory University School of Medicine, Atlanta, GA, USA
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Mudambi S, Fitzgerald ME, Washington DL, Pera PJ, Huss WJ, Paragh G. Dual targeting of KDM1A and antioxidants is an effective anticancer strategy. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.12.597953. [PMID: 38915482 PMCID: PMC11195178 DOI: 10.1101/2024.06.12.597953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Lysine Specific Demethylase 1 (KDM1A / LSD1) regulates mitochondrial respiration and stabilizes HIF-1A (hypoxia-inducible factor 1A). HIF-1A modulates reactive oxygen species (ROS) levels by increasing cellular glucose uptake, glycolysis, and endogenous antioxidants. The role of KDM1A in cellular ROS response has not previously been described. We determined the role of KDM1A in regulating the ROS response and the utility of KDM1A inhibitors in combination with ROS-inducing cancer therapies. Our results show that KDM1A inhibition sensitized cells to oxidative stress and increased total cellular ROS, which was mitigated by treatment with the antioxidant N-acetyl cysteine. KDM1A inhibition decreased basal mitochondrial respiration and impaired induction of HIF-1A after ROS exposure. Overexpression of HIF-1A salvaged cells from KDM1A inhibition enhanced sensitivity to ROS. Thus we found that increased sensitivity of ROS after KDM1A inhibition was mediated by HIF-1A and depletion of endogenous glutathione. We also show that KDM1A-specific inhibitor bizine synergized with antioxidant-depleting therapies, buthionine sulfoximine, and auranofin in rhabdomyosarcoma cell lines (Rh28 and Rh30). In this study, we describe a novel role for KDM1A in regulating HIF-1A functions under oxidative stress and found that dual targeting of KDM1A and antioxidant systems may serve as an effective combination anticancer strategy.
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Affiliation(s)
- Shaila Mudambi
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, United States 14263
- Department of Dermatology, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, United States 14263
| | - Megan E Fitzgerald
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, United States 14263
- Department of Dermatology, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, United States 14263
| | - Deschana L Washington
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, United States 14263
| | - Paula J Pera
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, United States 14263
- Department of Dermatology, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, United States 14263
| | - Wendy J Huss
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, United States 14263
- Department of Dermatology, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, United States 14263
| | - Gyorgy Paragh
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, United States 14263
- Department of Dermatology, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, United States 14263
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Unnikrishnan P, Grzesik S, Trojańska M, Klimek B, Plesnar-Bielak A. 6Pgdh polymorphism in wild bulb mite populations: prevalence, environmental correlates and life history trade-offs. EXPERIMENTAL & APPLIED ACAROLOGY 2024; 93:115-132. [PMID: 38597987 PMCID: PMC11182828 DOI: 10.1007/s10493-024-00909-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 03/15/2024] [Indexed: 04/11/2024]
Abstract
Genetic polymorphism in key metabolic genes plays a pivotal role in shaping phenotypes and adapting to varying environments. Polymorphism in the metabolic gene 6-phosphogluconate dehydrogenase (6Pgdh) in bulb mites, Rhizoglyphus robini is characterized by two alleles, S and F, that differ by a single amino acid substitution and correlate with male reproductive fitness. The S-bearing males demonstrate a reproductive advantage. Although the S allele rapidly fixes in laboratory settings, the persistence of polymorphic populations in the wild is noteworthy. This study examines the prevalence and stability of 6Pgdh polymorphism in natural populations across Poland, investigating potential environmental influences and seasonal variations. We found widespread 6Pgdh polymorphism in natural populations, with allele frequencies varying across locations and sampling dates but without clear geographical or seasonal clines. This widespread polymorphism and spatio-temporal variability may be attributed to population demography and gene flow between local populations. We found some correlation between soil properties, particularly cation content (Na, K, Ca, and Mg) and 6Pgdh allele frequencies, showcasing the connection between mite physiology and soil characteristics and highlighting the presence of environment-dependent balancing selection. We conducted experimental fitness assays to determine whether the allele providing the advantage in male-male competition has antagonistic effects on life-history traits and if these effects are temperature-dependent. We found that temperature does not differentially influence development time or juvenile survival in different 6Pgdh genotypes. This study reveals the relationship between genetic variation, environmental factors, and reproductive fitness in natural bulb mite populations, shedding light on the dynamic mechanisms governing 6Pgdh polymorphism.
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Affiliation(s)
- Pranav Unnikrishnan
- Faculty of Biology, Institute of Environmental Sciences, Jagiellonian University, ul. Gronostajowa 7, 30-387, Kraków, Poland.
| | - Szymon Grzesik
- Faculty of Biology, Institute of Environmental Sciences, Jagiellonian University, ul. Gronostajowa 7, 30-387, Kraków, Poland
| | - Magdalena Trojańska
- Faculty of Biology, Institute of Environmental Sciences, Jagiellonian University, ul. Gronostajowa 7, 30-387, Kraków, Poland
- Department of Pathobiology, Institute of Microbiology, University of Veterinary Medicine, 1210, Vienna, Austria
| | - Beata Klimek
- Faculty of Biology, Institute of Environmental Sciences, Jagiellonian University, ul. Gronostajowa 7, 30-387, Kraków, Poland
| | - Agata Plesnar-Bielak
- Faculty of Biology, Institute of Environmental Sciences, Jagiellonian University, ul. Gronostajowa 7, 30-387, Kraków, Poland
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Xie CY, Su RR, Wu B, Sun ZY, Tang YQ. Response mechanisms of different Saccharomyces cerevisiae strains to succinic acid. BMC Microbiol 2024; 24:158. [PMID: 38720268 PMCID: PMC11077785 DOI: 10.1186/s12866-024-03314-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 04/25/2024] [Indexed: 05/12/2024] Open
Abstract
BACKGROUND The production of succinic acid (SA) from biomass has attracted worldwide interest. Saccharomyces cerevisiae is preferred for SA production due to its strong tolerance to low pH conditions, ease of genetic manipulation, and extensive application in industrial processes. However, when compared with bacterial producers, the SA titers and productivities achieved by engineered S. cerevisiae strains were relatively low. To develop efficient SA-producing strains, it's necessary to clearly understand how S. cerevisiae cells respond to SA. RESULTS In this study, we cultivated five S. cerevisiae strains with different genetic backgrounds under different concentrations of SA. Among them, KF7 and NBRC1958 demonstrated high tolerance to SA, whereas NBRC2018 displayed the least tolerance. Therefore, these three strains were chosen to study how S. cerevisiae responds to SA. Under a concentration of 20 g/L SA, only a few differentially expressed genes were observed in three strains. At the higher concentration of 60 g/L SA, the response mechanisms of the three strains diverged notably. For KF7, genes involved in the glyoxylate cycle were significantly downregulated, whereas genes involved in gluconeogenesis, the pentose phosphate pathway, protein folding, and meiosis were significantly upregulated. For NBRC1958, genes related to the biosynthesis of vitamin B6, thiamin, and purine were significantly downregulated, whereas genes related to protein folding, toxin efflux, and cell wall remodeling were significantly upregulated. For NBRC2018, there was a significant upregulation of genes connected to the pentose phosphate pathway, gluconeogenesis, fatty acid utilization, and protein folding, except for the small heat shock protein gene HSP26. Overexpression of HSP26 and HSP42 notably enhanced the cell growth of NBRC1958 both in the presence and absence of SA. CONCLUSIONS The inherent activities of small heat shock proteins, the levels of acetyl-CoA and the strains' potential capacity to consume SA all seem to affect the responses and tolerances of S. cerevisiae strains to SA. These factors should be taken into consideration when choosing host strains for SA production. This study provides a theoretical basis and identifies potential host strains for the development of robust and efficient SA-producing strains.
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Affiliation(s)
- Cai-Yun Xie
- College of Architecture and Environment, Sichuan University, No. 24 South Section 1 First Ring Road, Chengdu, 610065, Sichuan, China
- Sichuan Environmental Protection Key Laboratory of Organic Wastes Valorization, No. 24 South Section 1 First Ring Road, Chengdu, 610065, Sichuan, China
- Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education, No. 24 South Section 1 First Ring Road, Chengdu, 610065, Sichuan, China
| | - Ran-Ran Su
- College of Architecture and Environment, Sichuan University, No. 24 South Section 1 First Ring Road, Chengdu, 610065, Sichuan, China
- Sichuan Environmental Protection Key Laboratory of Organic Wastes Valorization, No. 24 South Section 1 First Ring Road, Chengdu, 610065, Sichuan, China
| | - Bo Wu
- Biogas Institute of Ministry of Agriculture, Renmin Rd. 4-13, Chengdu, 610041, Sichuan, China
| | - Zhao-Yong Sun
- College of Architecture and Environment, Sichuan University, No. 24 South Section 1 First Ring Road, Chengdu, 610065, Sichuan, China
- Sichuan Environmental Protection Key Laboratory of Organic Wastes Valorization, No. 24 South Section 1 First Ring Road, Chengdu, 610065, Sichuan, China
- Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education, No. 24 South Section 1 First Ring Road, Chengdu, 610065, Sichuan, China
| | - Yue-Qin Tang
- College of Architecture and Environment, Sichuan University, No. 24 South Section 1 First Ring Road, Chengdu, 610065, Sichuan, China.
- Sichuan Environmental Protection Key Laboratory of Organic Wastes Valorization, No. 24 South Section 1 First Ring Road, Chengdu, 610065, Sichuan, China.
- Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education, No. 24 South Section 1 First Ring Road, Chengdu, 610065, Sichuan, China.
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Hao S, Meng Q, Sun H, Yang X, Liu B, Zhang Y, Zhou H, Xu Z, Wang Y. Human papillomavirus type 16 E6 promotes cervical cancer proliferation by upregulating transketolase enzymatic activity through the activation of protein kinase B. Mol Carcinog 2024; 63:339-355. [PMID: 37988232 DOI: 10.1002/mc.23656] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 10/16/2023] [Accepted: 10/30/2023] [Indexed: 11/23/2023]
Abstract
Over 99% of precancerous cervical lesions are associated with human papillomavirus (HPV) infection, with HPV types 16 and 18 (especially type 16) found in over 70% of cervical cancer cases globally. E6, a critical HPV gene, triggers malignant proliferation by degrading p53; however, this mechanism alone cannot fully explain the oncogenic effects of HPV16 E6. Therefore, we aimed to investigate new targets of HPV oncogenic mechanisms. Our results revealed significant changes in nonoxidative pentose phosphate pathway (PPP) metabolites in HPV16-positive cells. However, the role of nonoxidative PPP in HPV-associated cell transformation and tumor development remained unexplored. In this study, we investigated the impact and mechanisms of HPV16 E6 on cervical cancer proliferation using the HPV-negative cervical cancer cell line (C33A). HPV16 E6 was found to promote cervical cancer cell proliferation both in vitro and in vivo, activating the nonoxidative PPP. Transketolase (TKT), a key enzyme in the nonoxidative PPP, is highly expressed in cervical cancer tissues and associated with poor prognosis. HPV16 E6 promotes cervical cancer cell proliferation by upregulating TKT activity through the activation of AKT. In addition, oxythiamine (OT), a TKT inhibitor, hindered tumor growth, with enhanced effects when combined with cisplatin (DDP). In conclusion, HPV16 E6 promotes cervical cancer proliferation by upregulating TKT activity through the activation of AKT. OT demonstrates the potential to inhibit HPV16-positive cervical cancer growth, and when combined with DDP, could further enhance the tumor-suppressive effect of DDP.
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Affiliation(s)
- Shiming Hao
- Key Laboratory of Pathobiology, Ministry of Education, Norman Bethune College of Medicine, Jilin University, Changchun, Jilin Province, China
| | - Qingfei Meng
- Key Laboratory of Pathobiology, Ministry of Education, Norman Bethune College of Medicine, Jilin University, Changchun, Jilin Province, China
| | - Huihui Sun
- Key Laboratory of Pathobiology, Ministry of Education, Norman Bethune College of Medicine, Jilin University, Changchun, Jilin Province, China
| | - Xiangzhe Yang
- Key Laboratory of Pathobiology, Ministry of Education, Norman Bethune College of Medicine, Jilin University, Changchun, Jilin Province, China
| | - Bin Liu
- Department of Urology, The First Hospital of Jilin University, Changchun, China
| | - Yanghe Zhang
- Key Laboratory of Pathobiology, Ministry of Education, Norman Bethune College of Medicine, Jilin University, Changchun, Jilin Province, China
| | - Honglan Zhou
- Department of Urology, The First Hospital of Jilin University, Changchun, China
| | - Zhixiang Xu
- Key Laboratory of Pathobiology, Ministry of Education, Norman Bethune College of Medicine, Jilin University, Changchun, Jilin Province, China
- Department of Urology, The First Hospital of Jilin University, Changchun, China
- Department of Medicine, School of Life Sciences, Henan University, Kaifeng, Henan Province, China
| | - Yishu Wang
- Key Laboratory of Pathobiology, Ministry of Education, Norman Bethune College of Medicine, Jilin University, Changchun, Jilin Province, China
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Cheng K, Li X, Tong M, Jong MC, Cai Z, Zheng H, Xiao B, Zhou J. Integrated metagenomic and metaproteomic analyses reveal bacterial micro-ecological mechanisms in coral bleaching. mSystems 2023; 8:e0050523. [PMID: 37882797 PMCID: PMC10734480 DOI: 10.1128/msystems.00505-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 09/18/2023] [Indexed: 10/27/2023] Open
Abstract
IMPORTANCE Coral reefs worldwide are facing rapid decline due to coral bleaching. However, knowledge of the physiological characteristics and molecular mechanisms of coral symbionts respond to stress is scarce. Here, metagenomic and metaproteomic approaches were utilized to shed light on the changes in the composition and functions of coral symbiotic bacteria during coral bleaching. The results demonstrated that coral bleaching significantly affected the composition of symbionts, with bacterial communities dominating in bleached corals. Through differential analyses of gene and protein expression, it becomes evident that symbionts experience functional disturbances in response to heat stress. These disturbances result in abnormal energy metabolism, which could potentially compromise the health and resilience of the symbionts. Furthermore, our findings highlighted the highly diverse microbial communities of coral symbionts, with beneficial bacteria providing critical services to corals in stress responses and pathogenic bacteria driving coral bleaching. This study provides comprehensive insights into the complex response mechanisms of coral symbionts under heat stress from the micro-ecological perspective and offers fundamental data for future monitoring of coral health.
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Affiliation(s)
- Keke Cheng
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Xinyang Li
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Mengmeng Tong
- Ocean College, Zhejiang University, Zhoushan, Zhejiang, China
| | - Mui-Choo Jong
- Institute of Environment and Ecology, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Zhonghua Cai
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Huina Zheng
- Shenzhen Institute of Guangdong Ocean University, Shenzhen, Guangdong, China
| | - Baohua Xiao
- Shenzhen Institute of Guangdong Ocean University, Shenzhen, Guangdong, China
| | - Jin Zhou
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
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Da Costa RT, Riggs LM, Solesio ME. Inorganic polyphosphate and the regulation of mitochondrial physiology. Biochem Soc Trans 2023; 51:2153-2161. [PMID: 37955101 PMCID: PMC10842919 DOI: 10.1042/bst20230735] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 10/30/2023] [Accepted: 10/30/2023] [Indexed: 11/14/2023]
Abstract
Inorganic polyphosphate (polyP) is an ancient polymer that is well-conserved throughout evolution. It is formed by multiple subunits of orthophosphates linked together by phosphoanhydride bonds. The presence of these bonds, which are structurally similar to those found in ATP, and the high abundance of polyP in mammalian mitochondria, suggest that polyP could be involved in the regulation of the physiology of the organelle, especially in the energy metabolism. In fact, the scientific literature shows an unequivocal role for polyP not only in directly regulating oxidative a phosphorylation; but also in the regulation of reactive oxygen species metabolism, mitochondrial free calcium homeostasis, and the formation and opening of mitochondrial permeability transitions pore. All these processes are closely interconnected with the status of mitochondrial bioenergetics and therefore play a crucial role in maintaining mitochondrial and cell physiology. In this invited review, we discuss the main scientific literature regarding the regulatory role of polyP in mammalian mitochondrial physiology, placing a particular emphasis on its impact on energy metabolism. Although the effects of polyP on the physiology of the organelle are evident; numerous aspects, particularly within mammalian cells, remain unclear and require further investigation. These aspects encompass, for example, advancing the development of more precise analytical methods, unraveling the mechanism responsible for sensing polyP levels, and understanding the exact molecular mechanism that underlies the effects of polyP on mitochondrial physiology. By increasing our understanding of the biology of this ancient and understudied polymer, we could unravel new pharmacological targets in diseases where mitochondrial dysfunction, including energy metabolism dysregulation, has been broadly described.
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Affiliation(s)
- Renata T Da Costa
- Department of Biology; and Center for Computational and Integrative Biology (CCIB), Rutgers University, Camden, NJ, U.S.A
| | - Lindsey M Riggs
- Department of Biology; and Center for Computational and Integrative Biology (CCIB), Rutgers University, Camden, NJ, U.S.A
| | - Maria E Solesio
- Department of Biology; and Center for Computational and Integrative Biology (CCIB), Rutgers University, Camden, NJ, U.S.A
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10
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Gundogan K, Nellis MM, Ozer NT, Ergul SS, Sahin GG, Temel S, Yuksel RC, Teeny S, Alvarez JA, Sungur M, Jones DP, Ziegler TR. High-Resolution Plasma Metabolomics and Thiamine Status in Critically Ill Adult Patients. RESEARCH SQUARE 2023:rs.3.rs-3597052. [PMID: 38014088 PMCID: PMC10680934 DOI: 10.21203/rs.3.rs-3597052/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
BACKGROUND AND AIM Thiamine (Vitamin B1) is an essential micronutrient and a co-factor for metabolic functions related to energy metabolism. We determined the association between whole blood thiamine pyrophosphate (TPP) concentrations and plasma metabolites using high resolution metabolomics in critically ill patients. Methods Cross-sectional study performed in Erciyes University Hospital, Kayseri, Turkey and Emory University, Atlanta, GA, USA. Participants were ≥ 18 years of age, with an expected length of ICU stay longer than 48 hours, receiving furosemide therapy for at least 6 months before ICU admission. Results Blood for TPP and metabolomics was obtained on the day of ICU admission. Whole blood TPP concentrations were measured using high-performance liquid chromatography (HPLC). Liquid chromatography/mass spectrometry was used for plasma high-resolution metabolomics. Data was analyzed using regression analysis of TPP levels against all plasma metabolomic features in metabolome-wide association studies. We also compared metabolomic features from patients in the highest TPP concentration tertile to patients in the lowest TPP tertile as a secondary analysis. We enrolled 76 participants with a median age of 69 (range, 62.5-79.5) years. Specific metabolic pathways associated with whole blood TPP levels, using both regression and tertile analysis, included pentose phosphate, fructose and mannose, branched chain amino acid, arginine and proline, linoleate, and butanoate pathways. Conclusions Plasma high-resolution metabolomics analysis showed that whole blood TPP concentrations are significantly associated with metabolites and metabolic pathways linked to the metabolism of energy, amino acids, lipids, and the gut microbiome in adult critically ill patients.
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Seregina TA, Petrushanko IY, Zaripov PI, Shakulov RS, A. Sklyarova S, Mitkevich VA, Makarov AA, Mironov AS. Activation of Purine Biosynthesis Suppresses the Sensitivity of E. coli gmhA Mutant to Antibiotics. Int J Mol Sci 2023; 24:16070. [PMID: 38003258 PMCID: PMC10671730 DOI: 10.3390/ijms242216070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/01/2023] [Accepted: 11/02/2023] [Indexed: 11/26/2023] Open
Abstract
Inactivation of enzymes responsible for biosynthesis of the cell wall component of ADP-glycero-manno-heptose causes the development of oxidative stress and sensitivity of bacteria to antibiotics of a hydrophobic nature. The metabolic precursor of ADP-heptose is sedoheptulose-7-phosphate (S7P), an intermediate of the non-oxidative branch of the pentose phosphate pathway (PPP), in which ribose-5-phosphate and NADPH are generated. Inactivation of the first stage of ADP-heptose synthesis (ΔgmhA) prevents the outflow of S7P from the PPP, and this mutant is characterized by a reduced biosynthesis of NADPH and of the Glu-Cys-Gly tripeptide, glutathione, molecules known to be involved in the resistance to oxidative stress. We found that the derepression of purine biosynthesis (∆purR) normalizes the metabolic equilibrium in PPP in ΔgmhA mutants, suppressing the negative effects of gmhA mutation likely via the over-expression of the glycine-serine pathway that is under the negative control of PurR and might be responsible for the enhanced synthesis of NADPH and glutathione. Consistently, the activity of the soxRS system, as well as the level of glutathionylation and oxidation of proteins, indicative of oxidative stress, were reduced in the double ΔgmhAΔpurR mutant compared to the ΔgmhA mutant.
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Uemura M, Maeshige N, Yamaguchi A, Ma X, Matsuda M, Nishimura Y, Hasunuma T, Inoue T, Yan J, Wang J, Kondo H, Fujino H. Electrical stimulation facilitates NADPH production in pentose phosphate pathway and exerts an anti-inflammatory effect in macrophages. Sci Rep 2023; 13:17819. [PMID: 37857669 PMCID: PMC10587116 DOI: 10.1038/s41598-023-44886-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 10/13/2023] [Indexed: 10/21/2023] Open
Abstract
Macrophages play an important role as effector cells in innate immune system. Meanwhile, macrophages activated in a pro-inflammatory direction alter intracellular metabolism and damage intact tissues by increasing reactive oxygen species (ROS). Electrical stimulation (ES), a predominant physical agent to control metabolism in cells and tissues, has been reported to exert anti-inflammatory effect on immune cells. However, the mechanism underlying the anti-inflammatory effects by ES is unknown. This study aimed to investigate the effect of ES on metabolism in glycolytic-tricarboxylic acid cycle (TCA) cycle and inflammatory responses in macrophages. ES was performed on bone marrow-derived macrophages and followed by a stimulation with LPS. The inflammatory cytokine expression levels were analyzed by real-time polymerase chain reaction and ELISA. ROS production was analyzed by CellRox Green Reagent and metabolites by capillary electrophoresis-mass spectrometry. As a result, ES significantly reduced proinflammatory cytokine expression levels and ROS generation compared to the LPS group and increased glucose-1-phosphate, a metabolite of glycogen. ES also increased intermediate metabolites of the pentose phosphate pathway (PPP); ribulose-5-phosphate, rebose-5 phosphate, and nicotinamide adenine dinucleotide phosphate, a key factor of cellular antioxidation systems, as well as α-Ketoglutarate, an anti-oxidative metabolite in the TCA cycle. Our findings imply that ES enhanced NADPH production with enhancement of PPP, and also decreased oxidative stress and inflammatory responses in macrophages.
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Affiliation(s)
- Mikiko Uemura
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Kobe, Hyogo, 654-0142, Japan
- Department of Rehabilitation, Faculty of Health Sciences, Kansai University of Welfare Sciences, Kashiwara, Japan
| | - Noriaki Maeshige
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Kobe, Hyogo, 654-0142, Japan.
| | - Atomu Yamaguchi
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Kobe, Hyogo, 654-0142, Japan
| | - Xiaoqi Ma
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Kobe, Hyogo, 654-0142, Japan
| | - Mami Matsuda
- Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
| | - Yuya Nishimura
- Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
| | - Tomohisa Hasunuma
- Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
- Engineering Biology Research Center, Kobe University, Kobe, Japan
| | - Taketo Inoue
- Department of Emergency, Disaster and Critical Care Medicine, Hyogo Medical University, Nishinomiya, Japan
| | - Jiawei Yan
- School of Life Sciences and Technology, ShanghaiTech University, Shanghai, China
| | - Ji Wang
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, China
| | - Hiroyo Kondo
- Department of Food Science and Nutrition, Nagoya Women's University, Nagoya, Japan
| | - Hidemi Fujino
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Kobe, Hyogo, 654-0142, Japan
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Moore CJ, Holstege CP, Papin JA. Metabolic modeling of sex-specific liver tissue suggests mechanism of differences in toxicological responses. PLoS Comput Biol 2023; 19:e1010927. [PMID: 37603574 PMCID: PMC10470949 DOI: 10.1371/journal.pcbi.1010927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 08/31/2023] [Accepted: 07/25/2023] [Indexed: 08/23/2023] Open
Abstract
Male subjects in animal and human studies are disproportionately used for toxicological testing. This discrepancy is evidenced in clinical medicine where females are more likely than males to experience liver-related adverse events in response to xenobiotics. While previous work has shown gene expression differences between the sexes, there is a lack of systems-level approaches to understand the direct clinical impact of these differences. Here, we integrate gene expression data with metabolic network models to characterize the impact of transcriptional changes of metabolic genes in the context of sex differences and drug treatment. We used Tasks Inferred from Differential Expression (TIDEs), a reaction-centric approach to analyzing differences in gene expression, to discover that several metabolic pathways exhibit sex differences including glycolysis, fatty acid metabolism, nucleotide metabolism, and xenobiotics metabolism. When TIDEs is used to compare expression differences in treated and untreated hepatocytes, we find several subsystems with differential expression overlap with the sex-altered pathways such as fatty acid metabolism, purine and pyrimidine metabolism, and xenobiotics metabolism. Finally, using sex-specific transcriptomic data, we create individual and averaged male and female liver models and find differences in the pentose phosphate pathway and other metabolic pathways. These results suggest potential sex differences in the contribution of the pentose phosphate pathway to oxidative stress, and we recommend further research into how these reactions respond to hepatotoxic pharmaceuticals.
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Affiliation(s)
- Connor J. Moore
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, United States of America
| | - Christopher P. Holstege
- Department of Emergency Medicine, Division of Medical Toxicology, University of Virginia, Charlottesville, Virginia, United States of America
| | - Jason A. Papin
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, United States of America
- Department of Biochemistry & Molecular Genetics, University of Virginia, Charlottesville, Virginia, United States of America
- Department of Medicine, Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia, United States of America
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14
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Shegay PV, Shatova OP, Zabolotneva AA, Shestopalov AV, Kaprin AD. Moonlight functions of glycolytic enzymes in cancer. Front Mol Biosci 2023; 10:1076138. [PMID: 37449059 PMCID: PMC10337784 DOI: 10.3389/fmolb.2023.1076138] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 06/19/2023] [Indexed: 07/18/2023] Open
Abstract
Since an extensive genome research has started, basic principle "one gene-one protein-one function" was significantly revised. Many proteins with more than one function were identified and characterized as "moonlighting" proteins, which activity depend not only on structural peculiarities but also on compartmentation and metabolic environment. It turned out that "housekeeping" glycolytic enzymes show important moonlight functions such as control of development, proliferation, apoptosis, migration, regulation of transcription and cell signaling. Glycolytic enzymes emerged very early in evolution and because of the limited content of genomes, they could be used as ancient regulators for intercellular and intracellular communication. The multifunctionality of the constitutively expressed enzymes began to serve cancer cell survival and growth. In the present review we discuss some moonlight functions of glycolytic enzymes that important for malignant transformation and tumor growth.
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Affiliation(s)
- Petr V. Shegay
- Federal State Budget Institution, National Medical Research Radiology Center of the Ministry of Healthcare of the Russian Federation, Moscow, Russia
| | - Olga P. Shatova
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, Pirogov Russian National Research Medical University, Moscow, Russia
- Biochemistry Department, Peoples’ Friendship University of Russia, Moscow, Russia
| | - Anastasia A. Zabolotneva
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, Pirogov Russian National Research Medical University, Moscow, Russia
- National Medical Research Centre for Endocrinology, Laboratory of Biochemistry of Signaling Pathways, Moscow, Russia
| | - Aleksandr V. Shestopalov
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, Pirogov Russian National Research Medical University, Moscow, Russia
- National Medical Research Centre for Endocrinology, Laboratory of Biochemistry of Signaling Pathways, Moscow, Russia
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Andrei D. Kaprin
- Federal State Budget Institution, National Medical Research Radiology Center of the Ministry of Healthcare of the Russian Federation, Moscow, Russia
- Biochemistry Department, Peoples’ Friendship University of Russia, Moscow, Russia
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Kim GD, Qiu D, Jessen HJ, Mayer A. Metabolic Consequences of Polyphosphate Synthesis and Imminent Phosphate Limitation. mBio 2023; 14:e0010223. [PMID: 37074217 PMCID: PMC10294617 DOI: 10.1128/mbio.00102-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 03/22/2023] [Indexed: 04/20/2023] Open
Abstract
Cells stabilize intracellular inorganic phosphate (Pi) to compromise between large biosynthetic needs and detrimental bioenergetic effects of Pi. Pi homeostasis in eukaryotes uses Syg1/Pho81/Xpr1 (SPX) domains, which are receptors for inositol pyrophosphates. We explored how polymerization and storage of Pi in acidocalcisome-like vacuoles supports Saccharomyces cerevisiae metabolism and how these cells recognize Pi scarcity. Whereas Pi starvation affects numerous metabolic pathways, beginning Pi scarcity affects few metabolites. These include inositol pyrophosphates and ATP, a low-affinity substrate for inositol pyrophosphate-synthesizing kinases. Declining ATP and inositol pyrophosphates may thus be indicators of impending Pi limitation. Actual Pi starvation triggers accumulation of the purine synthesis intermediate 5-aminoimidazole-4-carboxamide ribonucleotide (AICAR), which activates Pi-dependent transcription factors. Cells lacking inorganic polyphosphate show Pi starvation features already under Pi-replete conditions, suggesting that vacuolar polyphosphate supplies Pi for metabolism even when Pi is abundant. However, polyphosphate deficiency also generates unique metabolic changes that are not observed in starving wild-type cells. Polyphosphate in acidocalcisome-like vacuoles may hence be more than a global phosphate reserve and channel Pi to preferred cellular processes. IMPORTANCE Cells must strike a delicate balance between the high demand of inorganic phosphate (Pi) for synthesizing nucleic acids and phospholipids and its detrimental bioenergetic effects by reducing the free energy of nucleotide hydrolysis. The latter may stall metabolism. Therefore, microorganisms manage the import and export of phosphate, its conversion into osmotically inactive inorganic polyphosphates, and their storage in dedicated organelles (acidocalcisomes). Here, we provide novel insights into metabolic changes that yeast cells may use to signal declining phosphate availability in the cytosol and differentiate it from actual phosphate starvation. We also analyze the role of acidocalcisome-like organelles in phosphate homeostasis. This study uncovers an unexpected role of the polyphosphate pool in these organelles under phosphate-rich conditions, indicating that its metabolic roles go beyond that of a phosphate reserve for surviving starvation.
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Affiliation(s)
- Geun-Don Kim
- Department of Immunobiology, University of Lausanne, Epalinges, Switzerland
| | - Danye Qiu
- Institute of Organic Chemistry, University of Freiburg, Freiburg, Germany
| | | | - Andreas Mayer
- Department of Immunobiology, University of Lausanne, Epalinges, Switzerland
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Islamova R, Yanshin N, Zamyatkina E, Gulk E, Zuy E, Billig S, Birkemeyer C, Tarakhovskaya E. Metabolic Adjustment of High Intertidal Alga Pelvetia canaliculata to the Tidal Cycle Includes Oscillations of Soluble Carbohydrates, Phlorotannins, and Citric Acid Content. Int J Mol Sci 2023; 24:10626. [PMID: 37445801 PMCID: PMC10341635 DOI: 10.3390/ijms241310626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 06/17/2023] [Accepted: 06/22/2023] [Indexed: 07/15/2023] Open
Abstract
The brown alga Pelvetia canaliculata is one of the species successfully adapted to intertidal conditions. Inhabiting the high intertidal zone, Pelvetia spends most of its life exposed to air, where it is subjected to desiccation, light, and temperature stresses. However, the physiological and biochemical mechanisms allowing this alga to tolerate such extreme conditions are still largely unknown. The objective of our study is to compare the biochemical composition of Pelvetia during the different phases of the tidal cycle. To our knowledge, this study is the first attempt to draft a detailed biochemical network underneath the complex physiological processes, conferring the successful survival of this organism in the harsh conditions of the high intertidal zone of the polar seas. We considered the tide-induced changes in relative water content, stress markers, titratable acidity, pigment, and phlorotannin content, as well as the low molecular weight metabolite profiles (GC-MS-based approach) in Pelvetia thalli. Thallus desiccation was not accompanied by considerable increase in reactive oxygen species content. Metabolic adjustment of P. canaliculata to emersion included accumulation of soluble carbohydrates, various phenolic compounds, including intracellular phlorotannins, and fatty acids. Changes in titratable acidity accompanied by the oscillations of citric acid content imply that some processes related to the crassulacean acid metabolism (CAM) may be involved in Pelvetia adaptation to the tidal cycle.
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Affiliation(s)
- Renata Islamova
- Department of Plant Physiology and Biochemistry, Faculty of Biology, Saint Petersburg State University, Universitetskaya Nab., 7/9, 199034 Saint Petersburg, Russia; (R.I.)
| | - Nikolay Yanshin
- Department of Plant Physiology and Biochemistry, Faculty of Biology, Saint Petersburg State University, Universitetskaya Nab., 7/9, 199034 Saint Petersburg, Russia; (R.I.)
| | - Elizaveta Zamyatkina
- Department of Plant Physiology and Biochemistry, Faculty of Biology, Saint Petersburg State University, Universitetskaya Nab., 7/9, 199034 Saint Petersburg, Russia; (R.I.)
| | - Ekaterina Gulk
- Department of Plant Physiology and Biochemistry, Faculty of Biology, Saint Petersburg State University, Universitetskaya Nab., 7/9, 199034 Saint Petersburg, Russia; (R.I.)
| | - Ekaterina Zuy
- Department of Plant Physiology and Biochemistry, Faculty of Biology, Saint Petersburg State University, Universitetskaya Nab., 7/9, 199034 Saint Petersburg, Russia; (R.I.)
| | - Susan Billig
- Faculty of Chemistry and Mineralogy, Leipzig University, 04103 Leipzig, Germany (C.B.)
| | - Claudia Birkemeyer
- Faculty of Chemistry and Mineralogy, Leipzig University, 04103 Leipzig, Germany (C.B.)
- German Center for Integrative Biodiversity Research (iDiv) Halle-Leipzig-Jena, 04103 Leipzig, Germany
| | - Elena Tarakhovskaya
- Department of Plant Physiology and Biochemistry, Faculty of Biology, Saint Petersburg State University, Universitetskaya Nab., 7/9, 199034 Saint Petersburg, Russia; (R.I.)
- Vavilov Institute of General Genetics, Saint Petersburg Branch, Russian Academy of Science, Universitetskaya Nab., 7/9, 199034 Saint Petersburg, Russia
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Tan Y, Liu X, Yang Y, Li B, Yu F, Zhao W, Fu C, Yu X, Han Z, Cheng M. Metabolomics analysis reveals serum biomarkers in patients with diabetic sarcopenia. Front Endocrinol (Lausanne) 2023; 14:1119782. [PMID: 37033246 PMCID: PMC10073735 DOI: 10.3389/fendo.2023.1119782] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 03/08/2023] [Indexed: 04/11/2023] Open
Abstract
INTRODUCTION Diabetic sarcopenia (DS) is characterized by muscle atrophy, slower nerve conduction, reduced maximum tension generated by skeletal muscle contraction, and slower contraction rate. Hence, DS can cause limb movement degeneration, slow movement, reduced balance, reduced metabolic rate, falls, fractures, etc. Moreover, the relevant early biological metabolites and their pathophysiological mechanism have yet to be characterized. METHOD The current cross-sectional study employed serum metabolomics analysis to screen potential noninvasive biomarkers in patients with diabetic sarcopenia. A total of 280 diabetic patients were enrolled in the study (n = 39 sarcopenia [DS], n = 241 without sarcopenia [DM]). Ten patients were randomly selected from both groups. Non-targeted metabolomic analysis was performed by ultra-high-performance liquid chromatography-electrospray ionization tandem mass spectrometry. RESULTS A total of 632 differential metabolites were identified, including 82 that were significantly differentially abundant (P < 0.05, VIP > 1, FC > 1.2 or FC < 0.8). Compared with the DM group, the contents of pentadecanoic acid, 5'-methylthioadenosine (5'-MTA), N,N-dimethylarginine (asymmetric dimethylarginine, ADMA), and glutamine in the DS group were significantly increased, while that of isoxanthohumol was decreased. DISCUSSION Based on receiver operating characteristic curve analysis, pentadecanoic acid, 5'-MTA, ADMA, and glutamine may serve as potential biomarkers of DS. Moreover, ATP-binding cassette (ABC) transporters and the mammalian target of the rapamycin signaling pathway were found to potentially have important regulatory roles in the occurrence and development of DS (P < 0.05). Collectively, the differential metabolites identified in this study provide new insights into the underlying pathophysiology of DS and serve as a basis for therapeutic interventions.
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Affiliation(s)
- Yuwei Tan
- Department of Geriatric Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Jinan Clinical Research Center for Geriatric Medicine (202132001), Jinan, China
| | - Xiaosong Liu
- Department of Geriatric Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Jinan Clinical Research Center for Geriatric Medicine (202132001), Jinan, China
| | - Yinping Yang
- Department of Geriatric Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Jinan Clinical Research Center for Geriatric Medicine (202132001), Jinan, China
| | - Baoying Li
- Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Jinan Aixinzhuoer Medical Laboratory, Jinan, China
| | - Fei Yu
- Department of Geriatric Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Jinan Clinical Research Center for Geriatric Medicine (202132001), Jinan, China
| | - Wenqian Zhao
- Department of Geriatric Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Jinan Clinical Research Center for Geriatric Medicine (202132001), Jinan, China
| | - Chunli Fu
- Department of Geriatric Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Jinan Clinical Research Center for Geriatric Medicine (202132001), Jinan, China
| | - Xin Yu
- Department of Geriatric Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Jinan Clinical Research Center for Geriatric Medicine (202132001), Jinan, China
| | - Zhenxia Han
- Department of Geriatric Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Jinan Clinical Research Center for Geriatric Medicine (202132001), Jinan, China
| | - Mei Cheng
- Department of Geriatric Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Jinan Clinical Research Center for Geriatric Medicine (202132001), Jinan, China
- *Correspondence: Mei Cheng,
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Disorders of cancer metabolism: The therapeutic potential of cannabinoids. Biomed Pharmacother 2023; 157:113993. [PMID: 36379120 DOI: 10.1016/j.biopha.2022.113993] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/07/2022] [Accepted: 11/07/2022] [Indexed: 11/13/2022] Open
Abstract
Abnormal energy metabolism, as one of the important hallmarks of cancer, was induced by multiple carcinogenic factors and tumor-specific microenvironments. It comprises aerobic glycolysis, de novo lipid biosynthesis, and glutamine-dependent anaplerosis. Considering that metabolic reprogramming provides various nutrients for tumor survival and development, it has been considered a potential target for cancer therapy. Cannabinoids have been shown to exhibit a variety of anticancer activities by unclear mechanisms. This paper first reviews the recent progress of related signaling pathways (reactive oxygen species (ROS), AMP-activated protein kinase (AMPK), mitogen-activated protein kinases (MAPK), phosphoinositide 3-kinase (PI3K), hypoxia-inducible factor-1alpha (HIF-1α), and p53) mediating the reprogramming of cancer metabolism (including glucose metabolism, lipid metabolism, and amino acid metabolism). Then we comprehensively explore the latest discoveries and possible mechanisms of the anticancer effects of cannabinoids through the regulation of the above-mentioned related signaling pathways, to provide new targets and insights for cancer prevention and treatment.
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Montllor-Albalate C, Thompson AE, Kim H, Reddi AR. Measuring the Oxidation State and Enzymatic Activity of Glyceraldehyde Phosphate Dehydrogenase (GAPDH). Methods Mol Biol 2023; 2675:219-236. [PMID: 37258767 DOI: 10.1007/978-1-0716-3247-5_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Glyceraldehyde phosphate dehydrogenase (GAPDH) is a highly conserved, essential, and abundant enzyme that catalyzes a rate-determining step of glycolysis. GAPDH catalyzes the nicotinamide adenine dinucleotide (NAD+)- and inorganic phosphate-dependent oxidation and phosphorylation of glyceraldehyde phosphate (GAP) to form 1,3-bisphosphoglycerate (BPG). As part of its mechanism of action, GAPDH employs a redox-sensitive cysteine that serves as a nucleophile to form a covalent adduct with GAP in order to set-up subsequent oxidation and phosphorylation steps. As a result of the redox sensitivity of the active site cysteine residue, GAPDH is susceptible to oxidative inactivation by oxidants such as hydrogen peroxide (H2O2). Indeed, numerous studies have demonstrated that oxidative inactivation of GAPDH has important metabolic consequences for adaptation to life in air and oxidative stress since decreased GAPDH activity results in the rerouting of carbon flux away from glycolysis and toward the pentose phosphate pathway to produce the key cellular reductant and antioxidant, NADPH. Thus, the ability to probe GAPDH oxidation and activity provides an important snapshot of the intracellular redox environment and glycolytic flux. Herein, we describe methods to measure reduced and oxidized GAPDH using thiol alkylation assays as well as GAPDH enzymatic activity.
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Affiliation(s)
- Claudia Montllor-Albalate
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA
- Parker Petit Institute for Bioengineering and Biosciences, Atlanta, GA, USA
| | - Anna E Thompson
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA
- Parker Petit Institute for Bioengineering and Biosciences, Atlanta, GA, USA
| | - Hyojung Kim
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA
- Parker Petit Institute for Bioengineering and Biosciences, Atlanta, GA, USA
| | - Amit R Reddi
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA.
- Parker Petit Institute for Bioengineering and Biosciences, Atlanta, GA, USA.
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20
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Sigurdsson MI, Kobayashi H, Amrein K, Nakahira K, Rogers AJ, Pinilla-Vera M, Baron RM, Fredenburgh LE, Lasky-Su JA, Christopher KB. Circulating N-formylmethionine and metabolic shift in critical illness: a multicohort metabolomics study. Crit Care 2022; 26:321. [PMID: 36261854 PMCID: PMC9580206 DOI: 10.1186/s13054-022-04174-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 09/20/2022] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Cell stress promotes degradation of mitochondria which release danger-associated molecular patterns that are catabolized to N-formylmethionine. We hypothesized that in critically ill adults, the response to N-formylmethionine is associated with increases in metabolomic shift-related metabolites and increases in 28-day mortality. METHODS We performed metabolomics analyses on plasma from the 428-subject Correction of Vitamin D Deficiency in Critically Ill Patients trial (VITdAL-ICU) cohort and the 90-subject Brigham and Women's Hospital Registry of Critical Illness (RoCI) cohort. In the VITdAL-ICU cohort, we analyzed 983 metabolites at Intensive Care Unit (ICU) admission, day 3, and 7. In the RoCI cohort, we analyzed 411 metabolites at ICU admission. The association between N-formylmethionine and mortality was determined by adjusted logistic regression. The relationship between individual metabolites and N-formylmethionine abundance was assessed with false discovery rate correction via linear regression, linear mixed-effects, and Gaussian graphical models. RESULTS Patients with the top quartile of N-formylmethionine abundance at ICU admission had a significantly higher adjusted odds of 28-day mortality in the VITdAL-ICU (OR, 2.4; 95%CI 1.5-4.0; P = 0.001) and RoCI cohorts (OR, 5.1; 95%CI 1.4-18.7; P = 0.015). Adjusted linear regression shows that with increases in N-formylmethionine abundance at ICU admission, 55 metabolites have significant differences common to both the VITdAL-ICU and RoCI cohorts. With increased N-formylmethionine abundance, both cohorts had elevations in individual short-chain acylcarnitine, branched chain amino acid, kynurenine pathway, and pentose phosphate pathway metabolites. CONCLUSIONS The results indicate that circulating N-formylmethionine promotes a metabolic shift with heightened mortality that involves incomplete mitochondrial fatty acid oxidation, increased branched chain amino acid metabolism, and activation of the pentose phosphate pathway.
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Affiliation(s)
- Martin Ingi Sigurdsson
- Anesthesiology and Critical Care Medicine, Landspitali University Hospital, University of Iceland, Hringbraut 101, 101, Reykjavík, Iceland
- Faculty of Medicine, University of Iceland, Vatnsmyrarvegur 16, 101, Reykjavik, Iceland
| | - Hirotada Kobayashi
- Division of Renal Medicine, Brigham and Women's Hospital, 75 Francis Street, Boston, 02115, USA
| | - Karin Amrein
- Division of Endocrinology and Diabetology, Medical University of Graz, Auenbruggerplatz 15, 8036, Graz, Austria
| | - Kiichi Nakahira
- Nara Medical University, 840 Shijocho, Kashihara, Nara, 634-8521, Japan
- Weill Cornell Medicine, 1300 York Avenue, New York, 10065, USA
| | - Angela J Rogers
- Stanford University Medical Center, 300 Pasteur Dr. H3143, Stanford, 94305, USA
| | - Mayra Pinilla-Vera
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, 75 Francis Street, Boston, 02115, USA
| | - Rebecca M Baron
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, 75 Francis Street, Boston, 02115, USA
| | - Laura E Fredenburgh
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, 75 Francis Street, Boston, 02115, USA
| | - Jessica A Lasky-Su
- Channing Division of Network Medicine, Brigham and Women's Hospital, 181 Longwood Avenue, Boston, 02115, USA
| | - Kenneth B Christopher
- Division of Renal Medicine, Brigham and Women's Hospital, 75 Francis Street, Boston, 02115, USA.
- Channing Division of Network Medicine, Brigham and Women's Hospital, 181 Longwood Avenue, Boston, 02115, USA.
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21
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Shin HE, Won CW, Kim M. Metabolomic profiles to explore biomarkers of severe sarcopenia in older men: A pilot study. Exp Gerontol 2022; 167:111924. [PMID: 35963453 DOI: 10.1016/j.exger.2022.111924] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 07/19/2022] [Accepted: 08/07/2022] [Indexed: 11/04/2022]
Abstract
BACKGROUND The pathophysiology of sarcopenia is complex and multifactorial; however, it has not yet been fully elucidated. Identifying metabolomic profiles may help clarify the mechanisms underlying sarcopenia. OBJECTIVE This pilot study explored potential noninvasive biomarkers of severe sarcopenia through metabolomic analysis in community-dwelling older men. METHODS Twenty older men (mean age: 81.9 ± 2.8 years) were selected from the Korean Frailty and Aging Cohort Study. Participants with severe sarcopenia (n = 10) were compared with non-sarcopenic, age- and body mass index-matched controls (n = 10). Severe sarcopenia was defined as low muscle mass, low muscle strength, and low physical performance using the Asian Working Group for Sarcopenia 2019 criteria. Non-targeted metabolomic profiling of plasma metabolites was performed using capillary electrophoresis time-of-flight mass spectrometry and absolute quantification was performed in target metabolites. RESULTS Among 191 plasma metabolic peaks, the concentrations of 10 metabolites significantly differed between severe sarcopenia group and non-sarcopenic controls. The plasma concentrations of L-alanine, homocitrulline, N-acetylserine, gluconic acid, N-acetylalanine, proline, and sulfotyrosine were higher, while those of 4-methyl-2-oxovaleric acid, 3-methyl-2-oxovaleric acid, and tryptophan were lower in participants with severe sarcopenia than in non-sarcopenic controls (all, p < 0.05). Among the 53 metabolites quantified as target metabolites, L-alanine (area under the receiver operating characteristic curve [AUC] = 0.760; p = 0.049), gluconic acid (AUC = 0.800; p = 0.023), proline (AUC = 0.785; p = 0.031), and tryptophan (AUC = 0.800; p = 0.023) determined the presence of severe sarcopenia. CONCLUSIONS Plasma metabolomic analysis demonstrated that L-alanine, gluconic acid, proline, and tryptophan may be potential biomarkers of severe sarcopenia. The identified metabolites can provide new insights into the underlying pathophysiology of severe sarcopenia and serve as the basis for preventive interventions.
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Affiliation(s)
- Hyung Eun Shin
- Department of Biomedical Science and Technology, Graduate School, Kyung Hee University, Seoul 02447, South Korea
| | - Chang Won Won
- Elderly Frailty Research Center, Department of Family Medicine, College of Medicine, Kyung Hee University, Kyung Hee University Medical Center, Seoul 02447, South Korea.
| | - Miji Kim
- Department of Biomedical Science and Technology, College of Medicine, East-West Medical Research Institute, Kyung Hee University, Seoul 02447, South Korea.
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22
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Liu Y, Cui DX, Pan Y, Yu SH, Zheng LW, Wan M. Metabolic-epigenetic nexus in regulation of stem cell fate. World J Stem Cells 2022; 14:490-502. [PMID: 36157525 PMCID: PMC9350619 DOI: 10.4252/wjsc.v14.i7.490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 05/31/2022] [Accepted: 07/11/2022] [Indexed: 02/06/2023] Open
Abstract
Stem cell fate determination is one of the central questions in stem cell biology, and although its regulation has been studied at genomic and proteomic levels, a variety of biological activities in cells occur at the metabolic level. Metabolomics studies have established the metabolome during stem cell differentiation and have revealed the role of metabolites in stem cell fate determination. While metabolism is considered to play a biological regulatory role as an energy source, recent studies have suggested the nexus between metabolism and epigenetics because several metabolites function as cofactors and substrates in epigenetic mechanisms, including histone modification, DNA methylation, and microRNAs. Additionally, the epigenetic modification is sensitive to the dynamic metabolites and consequently leads to changes in transcription. The nexus between metabolism and epigenetics proposes a novel stem cell-based therapeutic strategy through manipulating metabolites. In the present review, we summarize the possible nexus between metabolic and epigenetic regulation in stem cell fate determination, and discuss the potential preventive and therapeutic strategies via targeting metabolites.
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Affiliation(s)
- Yi Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Di-Xin Cui
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Yue Pan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Si-Han Yu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Li-Wei Zheng
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Mian Wan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan Province, China
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23
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Wang Y, Chen J, Duan R, Gu R, Wang W, Wu J, Lian H, Hu Y, Yuan A. High-Z-Sensitized Radiotherapy Synergizes with the Intervention of the Pentose Phosphate Pathway for In Situ Tumor Vaccination. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2109726. [PMID: 35102614 DOI: 10.1002/adma.202109726] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/18/2022] [Indexed: 06/14/2023]
Abstract
In situ tumor vaccination is preliminarily pursued to strengthen antitumor immune response. Immunogenic tumor cell death spontaneously releases abundant antigens and adjuvants for activation of dendritic cells, providing a paragon opportunity for establishing efficient in situ vaccination. Herein, Phy@PLGdH nanosheets are constructed by integrating physcion (Phy, an inhibitor of the pentose phosphate pathway (PPP)) with layered gadolinium hydroxide (PLGdH) nanosheets to boost radiation-therapy (RT)-induced immunogenic cell death (ICD) for potent in situ tumor vaccination. It is first observed that sheet-like PLGdH can present superior X-ray deposition and tumor penetrability, exhibiting improved radiosensitization in vitro and in vivo. Moreover, the destruction of cellular nicotinamide adenine dinucleotide phosphate (NADPH) and nucleotide homeostasis by Phy-mediated PPP intervention can further amplify PLGdH-sensitized RT-mediated oxidative stress and DNA damage, which correspondingly results in effective ICD and enhance the immunogenicity of irradiated tumor cells. Consequently, Phy@PLGdH-sensitized RT successfully primes robust CD8+ -T-cell-dependent antitumor immunity to potentiate checkpoint blockade immunotherapies against primary and metastatic tumors.
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Affiliation(s)
- Yuxiang Wang
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Science, and Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing, 210093, China
| | - Jing Chen
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Science, and Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing, 210093, China
| | - Rumeng Duan
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Science, and Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing, 210093, China
| | - Rong Gu
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Science, and Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing, 210093, China
| | - Weiran Wang
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Science, and Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing, 210093, China
| | - Jinhui Wu
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Science, and Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing, 210093, China
| | - Huibo Lian
- Department of Urology, Zhejiang Provincial People's Hospital, Hangzhou, Zhejiang, 310014, China
| | - Yiqiao Hu
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Science, and Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing, 210093, China
| | - Ahu Yuan
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Science, and Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing, 210093, China
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24
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Hambardikar V, Guitart-Mampel M, Scoma ER, Urquiza P, Nagana GGA, Raftery D, Collins JA, Solesio ME. Enzymatic Depletion of Mitochondrial Inorganic Polyphosphate (polyP) Increases the Generation of Reactive Oxygen Species (ROS) and the Activity of the Pentose Phosphate Pathway (PPP) in Mammalian Cells. Antioxidants (Basel) 2022; 11:685. [PMID: 35453370 PMCID: PMC9029763 DOI: 10.3390/antiox11040685] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 03/21/2022] [Accepted: 03/23/2022] [Indexed: 01/27/2023] Open
Abstract
Inorganic polyphosphate (polyP) is an ancient biopolymer that is well preserved throughout evolution and present in all studied organisms. In mammals, it shows a high co-localization with mitochondria, and it has been demonstrated to be involved in the homeostasis of key processes within the organelle, including mitochondrial bioenergetics. However, the exact extent of the effects of polyP on the regulation of cellular bioenergetics, as well as the mechanisms explaining these effects, still remain poorly understood. Here, using HEK293 mammalian cells under Wild-type (Wt) and MitoPPX (cells enzymatically depleted of mitochondrial polyP) conditions, we show that depletion of polyP within mitochondria increased oxidative stress conditions. This is characterized by enhanced mitochondrial O2- and intracellular H2O2 levels, which may be a consequence of the dysregulation of oxidative phosphorylation (OXPHOS) that we have demonstrated in MitoPPX cells in our previous work. These findings were associated with an increase in basal peroxiredoxin-1 (Prx1), superoxide dismutase-2 (SOD2), and thioredoxin (Trx) antioxidant protein levels. Using 13C-NMR and immunoblotting, we assayed the status of glycolysis and the pentose phosphate pathway (PPP) in Wt and MitoPPX cells. Our results show that MitoPPX cells display a significant increase in the activity of the PPP and an increase in the protein levels of transaldolase (TAL), which is a crucial component of the non-oxidative phase of the PPP and is involved in the regulation of oxidative stress. In addition, we observed a trend towards increased glycolysis in MitoPPX cells, which corroborates our prior work. Here, for the first time, we show the crucial role played by mitochondrial polyP in the regulation of mammalian redox homeostasis. Moreover, we demonstrate a significant effect of mitochondrial polyP on the regulation of global cellular bioenergetics in these cells.
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Affiliation(s)
- Vedangi Hambardikar
- Department of Biology and Center for Computational and Integrative Biology (CCIB), College of Arts and Sciences, Rutgers University, Camden, NJ 08103, USA; (V.H.); (M.G.-M.); (E.R.S.); (P.U.)
| | - Mariona Guitart-Mampel
- Department of Biology and Center for Computational and Integrative Biology (CCIB), College of Arts and Sciences, Rutgers University, Camden, NJ 08103, USA; (V.H.); (M.G.-M.); (E.R.S.); (P.U.)
| | - Ernest R. Scoma
- Department of Biology and Center for Computational and Integrative Biology (CCIB), College of Arts and Sciences, Rutgers University, Camden, NJ 08103, USA; (V.H.); (M.G.-M.); (E.R.S.); (P.U.)
| | - Pedro Urquiza
- Department of Biology and Center for Computational and Integrative Biology (CCIB), College of Arts and Sciences, Rutgers University, Camden, NJ 08103, USA; (V.H.); (M.G.-M.); (E.R.S.); (P.U.)
| | - Gowda G. A. Nagana
- Mitochondrial and Metabolism Center, University of Washington, Seattle, WA 98109, USA; (G.G.A.N.); (D.R.)
| | - Daniel Raftery
- Mitochondrial and Metabolism Center, University of Washington, Seattle, WA 98109, USA; (G.G.A.N.); (D.R.)
| | - John A. Collins
- Department of Orthopedic Surgery, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA 19107, USA;
| | - Maria E. Solesio
- Department of Biology and Center for Computational and Integrative Biology (CCIB), College of Arts and Sciences, Rutgers University, Camden, NJ 08103, USA; (V.H.); (M.G.-M.); (E.R.S.); (P.U.)
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25
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Sod1 integrates oxygen availability to redox regulate NADPH production and the thiol redoxome. Proc Natl Acad Sci U S A 2022; 119:2023328119. [PMID: 34969852 PMCID: PMC8740578 DOI: 10.1073/pnas.2023328119] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/14/2021] [Indexed: 12/12/2022] Open
Abstract
Cu/Zn superoxide dismutase (Sod1) is a key antioxidant enzyme, and its importance is underscored by the fact that its ablation in cell and animal models results in oxidative stress; metabolic defects; and reductions in cell proliferation, viability, and lifespan. Curiously, Sod1 detoxifies superoxide radicals (O2•−) in a manner that produces an oxidant as byproduct, hydrogen peroxide (H2O2). While much is known about the necessity of scavenging O2•−, it is less clear what the physiological roles of Sod1-derived H2O2 are. We discovered that Sod1-derived H2O2 plays an important role in antioxidant defense by stimulating the production of NADPH, a vital cellular reductant required for reactive oxygen species scavenging enzymes, as well as redox regulating a large network of enzymes. Cu/Zn superoxide dismutase (Sod1) is a highly conserved and abundant antioxidant enzyme that detoxifies superoxide (O2•−) by catalyzing its conversion to dioxygen (O2) and hydrogen peroxide (H2O2). Using Saccharomyces cerevisiae and mammalian cells, we discovered that a major aspect of the antioxidant function of Sod1 is to integrate O2 availability to promote NADPH production. The mechanism involves Sod1-derived H2O2 oxidatively inactivating the glycolytic enzyme, GAPDH, which in turn reroutes carbohydrate flux to the oxidative phase of the pentose phosphate pathway (oxPPP) to generate NADPH. The aerobic oxidation of GAPDH is dependent on and rate-limited by Sod1. Thus, Sod1 senses O2 via O2•− to balance glycolytic and oxPPP flux, through control of GAPDH activity, for adaptation to life in air. Importantly, this mechanism for Sod1 antioxidant activity requires the bulk of cellular Sod1, unlike for its role in protection against O2•− toxicity, which only requires <1% of total Sod1. Using mass spectrometry, we identified proteome-wide targets of Sod1-dependent redox signaling, including numerous metabolic enzymes. Altogether, Sod1-derived H2O2 is important for antioxidant defense and a master regulator of metabolism and the thiol redoxome.
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Imai N, Nicholls HT, Alves-Bezerra M, Li Y, Ivanova AA, Ortlund EA, Cohen DE. Up-regulation of thioesterase superfamily member 2 in skeletal muscle promotes hepatic steatosis and insulin resistance in mice. Hepatology 2022; 75:154-169. [PMID: 34433228 PMCID: PMC9938941 DOI: 10.1002/hep.32122] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 07/15/2021] [Accepted: 07/26/2021] [Indexed: 01/04/2023]
Abstract
BACKGROUND AND AIMS Thioesterase superfamily member 2 (Them2) is highly expressed in liver and oxidative tissues, where it hydrolyzes long-chain fatty acyl-CoA esters to free fatty acids and CoA. Although mice globally lacking Them2 (Them2-/- ) are protected against diet-induced obesity, hepatic steatosis (HS), and insulin resistance (IR), liver-specific Them2-/- mice remain susceptible. The aim of this study was to test whether Them2 activity in extrahepatic oxidative tissues is a primary determinant of HS and IR. APPROACH AND RESULTS Upon observing IR and up-regulation of Them2 in skeletal, but not cardiac, muscle of high-fat-diet (HFD)-fed wild-type compared to Them2-/- mice, we created mice with Them2 specifically deleted in skeletal (S-Them2-/- ) and cardiac muscle (C-Them2-/- ), as well as in adipose tissue (A-Them2-/- ). When fed an HFD, S-Them2-/- , but not C-Them2-/- or A-Them2-/- , mice exhibited reduced weight gain and improved glucose homeostasis and insulin sensitivity. Reconstitution of Them2 expression in skeletal muscle of global Them2-/- mice, using adeno-associated virus, was sufficient to restore excess weight gain. Increased rates of fatty acid oxidation in skeletal muscle of S-Them2-/- mice contributed to protection from HFD-induced HS by increasing VLDL triglyceride secretion rates in response to greater demand. Increases in insulin sensitivity were further attributable to alterations in production of skeletal muscle metabolites, including short-chain fatty acids, branched-chain amino acids, and pentose phosphate pathway intermediates, as well as in expression of myokines that modulate insulin responsiveness. CONCLUSIONS These results reveal a key role for skeletal muscle Them2 in the pathogenesis of HS and IR and implicate it as a target in the management of NAFLD.
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Affiliation(s)
- Norihiro Imai
- Division of Gastroenterology and Hepatology, Joan & Sanford I. Weill Department of Medicine, Weill Cornell Medical College, NY 10021 USA
| | - Hayley T. Nicholls
- Division of Gastroenterology and Hepatology, Joan & Sanford I. Weill Department of Medicine, Weill Cornell Medical College, NY 10021 USA
| | - Michele Alves-Bezerra
- Division of Gastroenterology and Hepatology, Joan & Sanford I. Weill Department of Medicine, Weill Cornell Medical College, NY 10021 USA
| | - Yingxia Li
- Division of Gastroenterology and Hepatology, Joan & Sanford I. Weill Department of Medicine, Weill Cornell Medical College, NY 10021 USA
| | - Anna A. Ivanova
- Department of Biochemistry, Emory University, Atlanta, GA 30322 USA
| | - Eric A. Ortlund
- Department of Biochemistry, Emory University, Atlanta, GA 30322 USA
| | - David E. Cohen
- Division of Gastroenterology and Hepatology, Joan & Sanford I. Weill Department of Medicine, Weill Cornell Medical College, NY 10021 USA
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27
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Ramu D, Singh S. Potential molecular targets of Leishmania pathways in developing novel antileishmanials. Future Microbiol 2021; 17:41-57. [PMID: 34877877 DOI: 10.2217/fmb-2021-0094] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The illness known as leishmaniasis has not become a household name like malaria, although it stands as the second-largest parasitic disease, surpassed only by malaria. As no licensed vaccine is available, treatment for leishmaniasis mostly relies on chemotherapy. Inefficiency and drug resistance are the major impediments in current therapeutics. In this scenario, identification of novel molecular drug candidates is indispensable to develop robust antileishmanials. The exploration of structure-based drugs to target enzymes/molecules of Leishmania which differ structurally/functionally from their equivalents in mammalian hosts not only helps in developing a new class of antileishmanials, but also paves the way to understand Leishmania biology. This review provides a comprehensive overview on possible drug candidates relating to various Leishmania molecular pathways.
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Affiliation(s)
- Dandugudumula Ramu
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, Greater Noida, 201314, India
| | - Shailja Singh
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, 110067, India
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28
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Phan LM, Rezaeian AH. ATM: Main Features, Signaling Pathways, and Its Diverse Roles in DNA Damage Response, Tumor Suppression, and Cancer Development. Genes (Basel) 2021; 12:845. [PMID: 34070860 PMCID: PMC8228802 DOI: 10.3390/genes12060845] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 05/26/2021] [Accepted: 05/27/2021] [Indexed: 11/30/2022] Open
Abstract
ATM is among of the most critical initiators and coordinators of the DNA-damage response. ATM canonical and non-canonical signaling pathways involve hundreds of downstream targets that control many important cellular processes such as DNA damage repair, apoptosis, cell cycle arrest, metabolism, proliferation, oxidative sensing, among others. Of note, ATM is often considered a major tumor suppressor because of its ability to induce apoptosis and cell cycle arrest. However, in some advanced stage tumor cells, ATM signaling is increased and confers remarkable advantages for cancer cell survival, resistance to radiation and chemotherapy, biosynthesis, proliferation, and metastasis. This review focuses on addressing major characteristics, signaling pathways and especially the diverse roles of ATM in cellular homeostasis and cancer development.
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Affiliation(s)
- Liem Minh Phan
- Department of Molecular & Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Abdol-Hossein Rezaeian
- Department of Drug Discovery & Biomedical Sciences, College of Pharmacy, The University of South Carolina, Columbia, SC 29208, USA
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29
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Tumor resistance to ferroptosis driven by Stearoyl-CoA Desaturase-1 (SCD1) in cancer cells and Fatty Acid Biding Protein-4 (FABP4) in tumor microenvironment promote tumor recurrence. Redox Biol 2021; 43:102006. [PMID: 34030117 PMCID: PMC8163990 DOI: 10.1016/j.redox.2021.102006] [Citation(s) in RCA: 112] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/04/2021] [Accepted: 05/10/2021] [Indexed: 12/18/2022] Open
Abstract
Problem Tumor recurrence is a major clinical issue that represents the principal cause of cancer-related deaths, with few targetable common pathways. Mechanisms by which residual tumors persist and progress under a continuous shift between hypoxia-reoxygenation after neoadjuvent-therapy are unknown. In this study, we investigated the role of lipid metabolism and tumor redox balance in tumor recurrence. Methods Lipidomics, proteomics and mass spectrometry imaging approaches where applied to mouse tumor models of recurrence. Genetic and pharmacological inhibitions of lipid mediators in tumors were used in vivo and in functional assays in vitro. Results We found that stearoyl-CoA desaturase-1 (SCD1) expressed by cancer cells and fatty acid binding protein-4 (FABP4) produced by tumor endothelial cells (TECs) and adipocytes in the tumor microenvironment (TME) are essential for tumor relapse in response to tyrosine kinase inhibitors (TKI) and chemotherapy. SCD1 and FABP4 were also found upregulated in recurrent human breast cancer samples and correlated with worse prognosis of cancer patients with different types of tumors. Mechanistically, SCD1 leads to fatty acid (FA) desaturation and FABP4 derived from TEM enhances lipid droplet (LD) in cancer cells, which cooperatively protect from oxidative stress-induced ferroptosis. We revealed that lipid mobilization and desaturation elicit tumor intrinsic antioxidant and anti-ferroptotic resources for survival and regrowth in a harsh TME. Inhibition of lipid transport from TME by FABP4 inhibitor reduced tumor regrowth and by genetic — or by pharmacological — targeting SCD1 in vivo, tumor regrowth was abolished completely. Conclusion This finding unveils that it is worth taking advantage of tumor lipid addiction, as a tumor vulnerability to design novel treatment strategy to prevent cancer recurrence. Increased oxidative stress markers and lipid metabolism in residual tumors. Expression of SCD1 in cancer cells and FABP4 in the tumor microenvironment drive tumor recurrence. Fatty acid desaturation by SCD1 and lipid transport by FABP4 confer resistance to ROS and ferroptosis. Blocking SCD1 and FABP4 sensitized cancer cells to ROS-induced ferroptosis and reduced tumor recurrence.
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The Pentose Phosphate Pathway in Yeasts-More Than a Poor Cousin of Glycolysis. Biomolecules 2021; 11:biom11050725. [PMID: 34065948 PMCID: PMC8151747 DOI: 10.3390/biom11050725] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/04/2021] [Accepted: 05/10/2021] [Indexed: 01/14/2023] Open
Abstract
The pentose phosphate pathway (PPP) is a route that can work in parallel to glycolysis in glucose degradation in most living cells. It has a unidirectional oxidative part with glucose-6-phosphate dehydrogenase as a key enzyme generating NADPH, and a non-oxidative part involving the reversible transketolase and transaldolase reactions, which interchange PPP metabolites with glycolysis. While the oxidative branch is vital to cope with oxidative stress, the non-oxidative branch provides precursors for the synthesis of nucleic, fatty and aromatic amino acids. For glucose catabolism in the baker’s yeast Saccharomyces cerevisiae, where its components were first discovered and extensively studied, the PPP plays only a minor role. In contrast, PPP and glycolysis contribute almost equally to glucose degradation in other yeasts. We here summarize the data available for the PPP enzymes focusing on S. cerevisiae and Kluyveromyces lactis, and describe the phenotypes of gene deletions and the benefits of their overproduction and modification. Reference to other yeasts and to the importance of the PPP in their biotechnological and medical applications is briefly being included. We propose future studies on the PPP in K. lactis to be of special interest for basic science and as a host for the expression of human disease genes.
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Lai HL, Fan XX, Li RZ, Wang YW, Zhang J, Liu L, Neher E, Yao XJ, Leung ELH. Roles of Ion Fluxes, Metabolism, and Redox Balance in Cancer Therapy. Antioxid Redox Signal 2021; 34:1108-1127. [PMID: 33115253 DOI: 10.1089/ars.2020.8125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Recent Advances: The 2019 Nobel Prize awarded to the mechanisms for oxygen sensing and adaptation according to oxygen availability, highlighting the fundamental importance of gaseous molecules. Gaseous molecules, including reactive oxygen species (ROS), can interact with different cations generated during metabolic and redox dysregulation in cancer cells. Cross talk between calcium signaling and metabolic/redox pathways leads to network-based dyregulation in cancer. Significance: Recent discovery on using small molecules targeting the ion channels, redox signaling, and protein modification on metabolic enzymes can effectively inhibit cancer growth. Several FDA-approved drugs and clinical trials are ongoing to target the calcium channels, such as TRPV6 and TRPM8. Multiple small molecules from natural products target metablic and redox enzymes to exert an anticancer effect. Critical Issues: Small molecules targeting key ion channels, metabolic enzymes that control key aspects of metabolism, and redox proteins are promising, but their action mechanisms of the target are needed to be elucidated with advanced-omic technologies, which can give network-based and highly dimensioal data. In addition, small molecules that can directly modify the protein residues have emerged as a novel anticancer strategy. Future Directions: Advanced technology accelerates the detection of ions and metabolic and redox changes in clinical samples for diagnosis and informs the decision of cancer treatment. The improvement of ROS detection, ROS target identification, and computational-aid drug discovery also improves clincal outcome.Overall, network-based or holistic regulations of cancer via ion therapy and metabolic and redox intervention are promising as new anticancer strategies. Antioxid. Redox Signal. 34, 1108-1127.
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Affiliation(s)
- Huan-Ling Lai
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology, Macau (SAR), China
| | - Xing-Xing Fan
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology, Macau (SAR), China
| | - Run-Ze Li
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology, Macau (SAR), China
| | - Yu-Wei Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology, Macau (SAR), China
| | - Junmin Zhang
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology, Macau (SAR), China.,School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, China
| | - Liang Liu
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology, Macau (SAR), China
| | - Erwin Neher
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology, Macau (SAR), China.,Membrane Biophysics Emeritus Group, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Xiao-Jun Yao
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology, Macau (SAR), China
| | - Elaine Lai-Han Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology, Macau (SAR), China
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The pentose phosphate pathway in industrially relevant fungi: crucial insights for bioprocessing. Appl Microbiol Biotechnol 2021; 105:4017-4031. [PMID: 33950280 PMCID: PMC8140973 DOI: 10.1007/s00253-021-11314-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 03/04/2021] [Accepted: 04/20/2021] [Indexed: 11/12/2022]
Abstract
Abstract The pentose phosphate pathway (PPP) is one of the most targeted pathways in metabolic engineering. This pathway is the primary source of NADPH, and it contributes in fungi to the production of many compounds of interest such as polyols, biofuels, carotenoids, or antibiotics. However, the regulatory mechanisms of the PPP are still not fully known. This review provides an insight into the current comprehension of the PPP in fungi and the limitations of this current understanding. It highlights how this knowledge contributes to targeted engineering of the PPP and thus to better performance of industrially used fungal strains. Key points • Type of carbon and nitrogen source as well as oxidative stress influence the PPP. • A complex network of transcription factors regulates the PPP. • Improved understanding of the PPP will allow to increase yields of bioprocesses.
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Yoshikawa Y, Nasuno R, Takagi H. An NADPH-independent mechanism enhances oxidative and nitrosative stress tolerance in yeast cells lacking glucose-6-phosphate dehydrogenase activity. Yeast 2021; 38:414-423. [PMID: 33648021 DOI: 10.1002/yea.3558] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 02/19/2021] [Accepted: 02/24/2021] [Indexed: 12/17/2022] Open
Abstract
The reduced form of nicotinamide adenine dinucleotide phosphate (NADPH), which is required for various redox systems involving antioxidative stress enzymes, is thus important for stress tolerance mechanisms. Here, we analyzed the stress response of the NADPH-depleted cells of Saccharomyces cerevisiae. A cell viability assay showed that the NADPH depletion induced by disruption of the ZWF1 gene encoding glucose-6-phosphate dehydrogenase, which is the major determinant of the intracellular NADPH/NADP+ ratio, enhanced the tolerance of S. cerevisiae to both oxidative and nitrosative stresses. The subsequent analyses demonstrated that the antioxidative transcriptional factor Yap1 was activated and the cytosolic catalase Ctt1, whose expression is regulated by Yap1, was upregulated in zwf1Δ cells irrespective of the presence or absence of stress stimuli. Moreover, deletion of the YAP1 or CTT1 gene inhibited the increased stress tolerance of zwf1Δ cells, indicating that Ctt1 dominantly contributed to the higher stress tolerance of zwf1Δ cells. Our findings suggest that an NADPH-independent mechanism enhances oxidative and nitrosative stress tolerance in ZWF1-lacking yeast cells.
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Affiliation(s)
- Yuki Yoshikawa
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
| | - Ryo Nasuno
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
| | - Hiroshi Takagi
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
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Li Z, Tang X, Li J, He Y. Comparative proteomic and transcriptomic analysis reveals high pH-induced expression signatures of Chinese shrimp Fenneropenaeus chinensis. Funct Integr Genomics 2021; 21:299-311. [PMID: 33629199 DOI: 10.1007/s10142-021-00779-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 02/01/2021] [Accepted: 02/14/2021] [Indexed: 01/01/2023]
Abstract
pH has a great impact on the distribution, growth, behavior, and physiology in many aquatic animals. The comparison of proteomics between normal and high pH stress samples was successfully achieved using iTRAQ proteomic analysis to screen key response proteins and pathways. After high pH stress, 124 upregulated and 41 downregulated proteins were identified. The higher expression levels of proteins like citrate synthase, glutathione S-transferase, glutathione peroxidase, and cytochrome c oxidase are associated with oxidative stress and mitochondrial dysfunction. The upregulation of glucose-regulated protein 78 indicated that the endoplasmic reticulum stress is induced by high pH stress. There were significant upregulation expressions of V-type H+-ATPase, Na+, K+-ATPase, 14-3-3 protein, as well as ATP-binding cassette transmembrane transporters after high pH exposure, which indicating their important roles in response to high pH stress. The abundance of proteins involved in protein glycosylation, oxidative pentose phosphate pathway, protein export, and glutathione metabolism were found enriched in high pH group than in control group. Quantitative proteomic profiling and integrated analysis with transcriptomic data provide new insights into the mechanisms underlying the molecular response to high pH stress in Fenneropenaeus chinensis.
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Affiliation(s)
- Zhaoxia Li
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China
| | - Xiaoqi Tang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China
| | - Jian Li
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, People's Republic of China
- Function Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266200, People's Republic of China
| | - Yuying He
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, People's Republic of China.
- Function Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266200, People's Republic of China.
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Williams A, Chiles EN, Conetta D, Pathmanathan JS, Cleves PA, Putnam HM, Su X, Bhattacharya D. Metabolomic shifts associated with heat stress in coral holobionts. SCIENCE ADVANCES 2021; 7:eabd4210. [PMID: 33523848 PMCID: PMC7775768 DOI: 10.1126/sciadv.abd4210] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 11/06/2020] [Indexed: 05/26/2023]
Abstract
Understanding the response of the coral holobiont to environmental change is crucial to inform conservation efforts. The most pressing problem is "coral bleaching," usually precipitated by prolonged thermal stress. We used untargeted, polar metabolite profiling to investigate the physiological response of the coral species Montipora capitata and Pocillopora acuta to heat stress. Our goal was to identify diagnostic markers present early in the bleaching response. From the untargeted UHPLC-MS data, a variety of co-regulated dipeptides were found that have the highest differential accumulation in both species. The structures of four dipeptides were determined and showed differential accumulation in symbiotic and aposymbiotic (alga-free) populations of the sea anemone Aiptasia (Exaiptasia pallida), suggesting the deep evolutionary origins of these dipeptides and their involvement in symbiosis. These and other metabolites may be used as diagnostic markers for thermal stress in wild coral.
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Affiliation(s)
- Amanda Williams
- Microbial Biology Graduate Program, Rutgers University, New Brunswick, NJ 08901, USA
| | - Eric N Chiles
- Metabolomics Shared Resource, Rutgers Cancer Institute of New Jersey, Rutgers University, New Brunswick, NJ 08901, USA
| | - Dennis Conetta
- Department of Biological Sciences, University of Rhode Island, Kingston, RI 02881, USA
| | - Jananan S Pathmanathan
- Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, NJ 08901, USA
| | - Phillip A Cleves
- Department of Genetics, Stanford University, Stanford, CA 94305, USA
| | - Hollie M Putnam
- Department of Biological Sciences, University of Rhode Island, Kingston, RI 02881, USA
| | - Xiaoyang Su
- Metabolomics Shared Resource, Rutgers Cancer Institute of New Jersey, Rutgers University, New Brunswick, NJ 08901, USA.
- Division of Endocrinology, Department of Medicine, Robert Wood Johnson Medical School, Rutgers University, New Brunswick, NJ 08901, USA
| | - Debashish Bhattacharya
- Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, NJ 08901, USA.
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Sabadin GA, Salomon TB, Leite MS, Benfato MS, Oliveira PL, da Silva Vaz I. An insight into the functional role of antioxidant and detoxification enzymes in adult Rhipicephalus microplus female ticks. Parasitol Int 2020; 81:102274. [PMID: 33352319 DOI: 10.1016/j.parint.2020.102274] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 12/12/2020] [Accepted: 12/14/2020] [Indexed: 10/22/2022]
Abstract
Ticks have developed physiological adaptations to transport, store, metabolize and secrete toxic components from the diet and environment. Different classes of enzymes are involved in these processes, however, the role of several of them is not yet characterized in Rhipicephalus microplus. In this context, this work investigated the action of antioxidant and detoxification enzymes, as well as the levels of essential cellular reductants in R. microplus partially engorged females (PEF) and fully engorged females (FEF). Results demonstrated that enzymes transcriptional levels and enzymatic activity from ovary and fat body were higher in PEF than in FEF, except for ovary Glutathione peroxidase (GPx), which was the only enzyme showing highest activity in the FEF stage. These results indicated a higher demand for antioxidant potential in these organs at the initial feeding phase than during egg-laying. In midgut, however, there was more variability in the transcriptional levels and activity of the different enzymes between the PEF and FEF phases. Similar NADPH levels were found in PEF and FEF phases, suggesting a remarkable capacity to maintain a regular supply of reducing power, despite the developmental changes and large intake of heme and iron. However, reduced glutathione (GSH) levels were variable between PEF and FEF when distinct organs were compared. Taken together, our data suggest a higher demand for reducing potential in FEF ticks. The silencing of catalase (CAT) or thioredoxin reductase (TRx) genes in females did not impair feeding, egg-laying capacity, or larvae hatching. CAT-silenced ticks had increased ovary peroxidase activity, a possible compensatory antioxidant mechanism. Altogether, the results shed light on the complexity of the antioxidant and detoxification enzyme system in ticks and its involvement in different physiological mechanisms.
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Affiliation(s)
- Gabriela A Sabadin
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500 Porto Alegre, RS, Brazil
| | - Tiago B Salomon
- Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500 Porto Alegre, RS, Brazil
| | - Milane S Leite
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Mara S Benfato
- Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500 Porto Alegre, RS, Brazil
| | - Pedro L Oliveira
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil; Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular (INCT-EM), Brazil
| | - Itabajara da Silva Vaz
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500 Porto Alegre, RS, Brazil; Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular (INCT-EM), Brazil; Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9090 Porto Alegre, RS, Brazil.
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Zhang Y, Luo M, Cheng L, Lin Y, Chen Q, Sun B, Gu X, Wang Y, Li M, Luo Y, Wang X, Zhang Y, Tang H. Identification of the Cytosolic Glucose-6-Phosphate Dehydrogenase Gene from Strawberry Involved in Cold Stress Response. Int J Mol Sci 2020; 21:ijms21197322. [PMID: 33023038 PMCID: PMC7582851 DOI: 10.3390/ijms21197322] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/23/2020] [Accepted: 09/28/2020] [Indexed: 11/16/2022] Open
Abstract
Glucose-6-phosphate dehydrogenase (G6PDH) plays an important role in plant stress responses. Here, five FaG6PDH sequences were obtained in strawberry, designated as FaG6PDH-CY, FaG6PDH-P1, FaG6PDH-P1.1, FaG6PDH-P2 and FaG6PDH-P0, which were divided into cytosolic (CY) and plastidic (P) isoforms based on the bioinformatic analysis. The respective FaG6PDH genes had distinct expression patterns in all tissues and at different stages of fruit development. Notably, FaG6PDH-CY was the most highly expressed gene among five FaG6PDH members, indicating it encoded the major G6PDH isoform throughout the plant. FaG6PDH positively regulated cold tolerance in strawberry. Inhibition of its activity gave rise to greater cold-induced injury in plant. The FaG6PDH-CY transcript had a significant increase under cold stress, similar to the G6PDH enzyme activity, suggesting a principal participant in response to cold stress. Further study showed that the low-temperature responsiveness (LTR) element in FaG6PDH-CY promoter can promote the gene expression when plant encountered cold stimuli. Besides, FaG6PDH-CY was involved in regulating cold-induced activation of antioxidant enzyme genes (FaSOD, FaCAT, FaAPX and FaGR) and RBOH-dependent ROS generation. The elevated FaG6PDH-CY enhanced ROS-scavenging capability of antioxidant enzymes to suppress ROS excessive accumulation and relieved the oxidative damage, eventually improving the strawberry resistance to cold stress.
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Affiliation(s)
- Yunting Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (M.L.); (L.C.); (Y.L.); (Q.C.); (B.S.); (Y.W.); (M.L.); (Y.L.); (X.W.)
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Mengwen Luo
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (M.L.); (L.C.); (Y.L.); (Q.C.); (B.S.); (Y.W.); (M.L.); (Y.L.); (X.W.)
| | - Lijuan Cheng
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (M.L.); (L.C.); (Y.L.); (Q.C.); (B.S.); (Y.W.); (M.L.); (Y.L.); (X.W.)
| | - Yuanxiu Lin
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (M.L.); (L.C.); (Y.L.); (Q.C.); (B.S.); (Y.W.); (M.L.); (Y.L.); (X.W.)
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (M.L.); (L.C.); (Y.L.); (Q.C.); (B.S.); (Y.W.); (M.L.); (Y.L.); (X.W.)
| | - Bo Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (M.L.); (L.C.); (Y.L.); (Q.C.); (B.S.); (Y.W.); (M.L.); (Y.L.); (X.W.)
| | - Xianjie Gu
- Mianyang Academy of Agricultural Sciences, Mianyang 621000, China;
| | - Yan Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (M.L.); (L.C.); (Y.L.); (Q.C.); (B.S.); (Y.W.); (M.L.); (Y.L.); (X.W.)
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Mengyao Li
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (M.L.); (L.C.); (Y.L.); (Q.C.); (B.S.); (Y.W.); (M.L.); (Y.L.); (X.W.)
| | - Ya Luo
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (M.L.); (L.C.); (Y.L.); (Q.C.); (B.S.); (Y.W.); (M.L.); (Y.L.); (X.W.)
| | - Xiaorong Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (M.L.); (L.C.); (Y.L.); (Q.C.); (B.S.); (Y.W.); (M.L.); (Y.L.); (X.W.)
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Yong Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (M.L.); (L.C.); (Y.L.); (Q.C.); (B.S.); (Y.W.); (M.L.); (Y.L.); (X.W.)
- Correspondence: (Y.Z.); (H.T.)
| | - Haoru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (M.L.); (L.C.); (Y.L.); (Q.C.); (B.S.); (Y.W.); (M.L.); (Y.L.); (X.W.)
- Correspondence: (Y.Z.); (H.T.)
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Pascale RM, Calvisi DF, Simile MM, Feo CF, Feo F. The Warburg Effect 97 Years after Its Discovery. Cancers (Basel) 2020; 12:E2819. [PMID: 33008042 PMCID: PMC7599761 DOI: 10.3390/cancers12102819] [Citation(s) in RCA: 157] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 09/22/2020] [Indexed: 02/06/2023] Open
Abstract
The deregulation of the oxidative metabolism in cancer, as shown by the increased aerobic glycolysis and impaired oxidative phosphorylation (Warburg effect), is coordinated by genetic changes leading to the activation of oncogenes and the loss of oncosuppressor genes. The understanding of the metabolic deregulation of cancer cells is necessary to prevent and cure cancer. In this review, we illustrate and comment the principal metabolic and molecular variations of cancer cells, involved in their anomalous behavior, that include modifications of oxidative metabolism, the activation of oncogenes that promote glycolysis and a decrease of oxygen consumption in cancer cells, the genetic susceptibility to cancer, the molecular correlations involved in the metabolic deregulation in cancer, the defective cancer mitochondria, the relationships between the Warburg effect and tumor therapy, and recent studies that reevaluate the Warburg effect. Taken together, these observations indicate that the Warburg effect is an epiphenomenon of the transformation process essential for the development of malignancy.
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Affiliation(s)
- Rosa Maria Pascale
- Department of Medical, Surgery and Experimental Sciences, Division of Experimental Pathology and Oncology, University of Sassari, 07100 Sassari, Italy; (D.F.C.); (M.M.S.); (F.F.)
| | - Diego Francesco Calvisi
- Department of Medical, Surgery and Experimental Sciences, Division of Experimental Pathology and Oncology, University of Sassari, 07100 Sassari, Italy; (D.F.C.); (M.M.S.); (F.F.)
| | - Maria Maddalena Simile
- Department of Medical, Surgery and Experimental Sciences, Division of Experimental Pathology and Oncology, University of Sassari, 07100 Sassari, Italy; (D.F.C.); (M.M.S.); (F.F.)
| | - Claudio Francesco Feo
- Department of Clinical, Surgery and Experimental Sciences, Division of Surgery, University of Sassari, 07100 Sassari, Italy;
| | - Francesco Feo
- Department of Medical, Surgery and Experimental Sciences, Division of Experimental Pathology and Oncology, University of Sassari, 07100 Sassari, Italy; (D.F.C.); (M.M.S.); (F.F.)
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Durán-Soria S, Pott DM, Osorio S, Vallarino JG. Sugar Signaling During Fruit Ripening. FRONTIERS IN PLANT SCIENCE 2020; 11:564917. [PMID: 32983216 PMCID: PMC7485278 DOI: 10.3389/fpls.2020.564917] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 08/13/2020] [Indexed: 05/14/2023]
Abstract
Sugars play a key role in fruit quality, as they directly influence taste, and thus consumer acceptance. Carbohydrates are the main resources needed by the plant for carbon and energy supply and have been suggested to be involved in all the important developmental processes, including embryogenesis, seed germination, stress responses, and vegetative and reproductive growth. Recently, considerable progresses have been made in understanding regulation of fruit ripening mechanisms, based on the role of ethylene, auxins, abscisic acid, gibberellins, or jasmonic acid, in both climacteric and non-climacteric fruits. However, the role of sugar and its associated molecular network with hormones in the control of fruit development and ripening is still poorly understood. In this review, we focus on sugar signaling mechanisms described up to date in fruits, describing their involvement in ripening-associated processes, such as pigments accumulation, and their association with hormone transduction pathways, as well as their role in stress-related responses.
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Affiliation(s)
| | | | - Sonia Osorio
- Departamento de Biología Molecular y Bioquímica, Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora”, Universidad de Málaga – Consejo Superior de Investigaciones Científicas (IHSM-UMA-CSIC), Málaga, Spain
| | - José G. Vallarino
- Departamento de Biología Molecular y Bioquímica, Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora”, Universidad de Málaga – Consejo Superior de Investigaciones Científicas (IHSM-UMA-CSIC), Málaga, Spain
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40
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Chaput V, Martin A, Lejay L. Redox metabolism: the hidden player in carbon and nitrogen signaling? JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:3816-3826. [PMID: 32064525 DOI: 10.1093/jxb/eraa078] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 02/12/2020] [Indexed: 05/05/2023]
Abstract
While decades of research have considered redox metabolism as purely defensive, recent results show that reactive oxygen species (ROS) are necessary for growth and development. Close relationships have been found between the regulation of nitrogen metabolism and ROS in response to both carbon and nitrogen availability. Root nitrate uptake and nitrogen metabolism have been shown to be regulated by a signal from the oxidative pentose phosphate pathway (OPPP) in response to carbon signaling. As a major source of NADP(H), the OPPP is critical to maintaining redox balance under stress situations. Furthermore, recent results suggest that at least part of the regulation of the root nitrate transporter by nitrogen signaling is also linked to the redox status of the plant. This leads to the question of whether there is a more general role of redox metabolism in the regulation of nitrogen metabolism by carbon and nitrogen. This review highlights the role of the OPPP in carbon signaling and redox metabolism, and the interaction between redox and nitrogen metabolism. We discuss how redox metabolism could be an important player in the regulation of nitrogen metabolism in response to carbon/nitrogen interaction and the implications for plant adaptation to extreme environments and future crop development.
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Affiliation(s)
- Valentin Chaput
- BPMP, Univ Montpellier, CNRS, INRAE, Institut Agro, Montpellier, France
| | - Antoine Martin
- BPMP, Univ Montpellier, CNRS, INRAE, Institut Agro, Montpellier, France
| | - Laurence Lejay
- BPMP, Univ Montpellier, CNRS, INRAE, Institut Agro, Montpellier, France
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Elias Moreira AL, Milhomem Cruz-Leite VR, O'Hara Souza Silva L, Alves Parente AF, Bailão AM, Maria de Almeida Soares C, Parente-Rocha JA, Ruiz OH, Borges CL. Proteome characterization of Paracoccidioides lutzii conidia by using nanoUPLC-MS E. Fungal Biol 2020; 124:766-780. [PMID: 32883428 DOI: 10.1016/j.funbio.2020.05.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Revised: 04/27/2020] [Accepted: 05/22/2020] [Indexed: 12/30/2022]
Abstract
Fungi of the genus Paracoccidioides are the etiological agents of Paracoccidioidomycosis (PCM), the most prevalent mycosis in Latin America. Paracoccidioidomycosis infection is acquired by inhalation of Paracoccidioides conidia, which have first contact with the lungs and can subsequently spread to other organs/tissues. Until now, there have been no proteomic studies focusing on this infectious particle of Paracoccidioides. In order to identify the Paracoccidioides lutzii conidia proteome, conidia were produced and purified. Proteins were characterized by use of the nanoUPLC-MSE approach. The strategy allowed us to identify a total of 242 proteins in P. lutzii conidia. In the conidia proteome, proteins were classified in functional categories such as protein synthesis, energy production, metabolism, cellular defense/virulence processes, as well as other processes that can be important for conidia survival. Through this analysis, a pool of ribosomal proteins was identified, which may be important for the initial processes of dimorphic transition. In addition, molecules related to energetic and metabolic processes were identified, suggesting a possible basal metabolism during this form of resistance of the fungus. In addition, adhesins and virulence factors were identified in the P. lutzii conidia proteome. Our results demonstrate the potential role that these molecules can play during early cell-host interaction processes, as well as the way in which these molecules are involved in environmental survival during this form of propagation.
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Affiliation(s)
- André Luís Elias Moreira
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
| | | | - Lana O'Hara Souza Silva
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
| | | | - Alexandre Melo Bailão
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
| | - Célia Maria de Almeida Soares
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
| | - Juliana Alves Parente-Rocha
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
| | - Orville Hernandez Ruiz
- Unidad de Biología Celular y Molecular, Corporación para Investigaciones Biológicas (CIB), Medellín, Colombia; Grupo de Investigación MICROBA, Escuela de Microbiología, Universidad de Antioquia, Medellín, Colombia.
| | - Clayton Luiz Borges
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
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Jin M, Wang H, Liu H, Xia Y, Ruan S, Huang Y, Qiu J, Du S, Xu L. Oxidative stress response and proteomic analysis reveal the mechanisms of toxicity of imidazolium-based ionic liquids against Arabidopsis thaliana. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 260:114013. [PMID: 32000025 DOI: 10.1016/j.envpol.2020.114013] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 12/29/2019] [Accepted: 01/16/2020] [Indexed: 06/10/2023]
Abstract
Ionic liquids (ILs) are extensively used in various fields, posing a potential threat in the ecosystem because of their high stability, excellent solubility, and biological toxicity. In this study, the toxicity mechanism of three ILs, 1-octyl-3-methylimidazolium chloride ([C8MIM]Cl), 1-decyl-3-methylimidazolium chloride ([C10MIM]Cl), and 1-dodecyl-3-methylimidazolium chloride ([C12MIM]Cl) on Arabidopsis thaliana were revealed. Reactive oxygen species (ROS) level increased with higher concentration and longer carbon chain length of ILs, which led to the increase of malondialdehyde (MDA) content and antioxidase activity, including superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX) and peroxidase (POD) activities. SOD, CAT, and GPX activities decreased in high ILs concentration due to the excessive ROS. Differentially expressed protein was analyzed based on Gene ontology (GO) and KEGG pathways analysis. 70, 45, 84 up-regulated proteins, and 72, 104, 79 down-regulated proteins were identified in [C8MIM]Cl, [C10MIM]Cl, and [C12MIM]Cl treatment, respectively (fold change ≥ 1.5 with ≥95% confidence). Cellular aldehyde metabolic process, mitochondrial and mitochondrial respiratory chains, glutathione transferase and oxidoreductase activity were enriched as up-regulated proteins as the defense mechanism of A. thaliana to resist external stresses. Chloroplast, photosynthetic membrane and thylakoid, structural constituent of ribosome, and transmembrane transport were enriched as the down-regulated protein. Compared with the control, 8 and 14 KEGG pathways were identified forup-regulated and down-regulated proteins, respectively, in three IL treatments. Metabolic pathways, carbon metabolism, biosynthesis of amino acids, porphyrin and chlorophyll metabolism were significantly down-regulated. The GO terms annotation demonstrated the oxidative stress response and effects on photosynthesis of A. thaliana in ILs treatment from biological process, cellular component, and molecular function categories.
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Affiliation(s)
- Mingkang Jin
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, Zhejiang Province, China
| | - Huan Wang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, Zhejiang Province, China
| | - Huijun Liu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, Zhejiang Province, China; Instrumental Analysis Center of Zhejiang Gongshang University, Hangzhou, 310018, Zhejiang Province, China.
| | - Yilu Xia
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, Zhejiang Province, China
| | - Songlin Ruan
- Laboratory of Plant Molecular Biology & Proteomics, Institute of Biotechnology, Hangzhou Academy of Agricultural Sciences, Hangzhou, 310024, China
| | - Yuqing Huang
- Laboratory of Plant Molecular Biology & Proteomics, Institute of Biotechnology, Hangzhou Academy of Agricultural Sciences, Hangzhou, 310024, China
| | - Jieren Qiu
- Laboratory of Plant Molecular Biology & Proteomics, Institute of Biotechnology, Hangzhou Academy of Agricultural Sciences, Hangzhou, 310024, China
| | - Shaoting Du
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, Zhejiang Province, China; Instrumental Analysis Center of Zhejiang Gongshang University, Hangzhou, 310018, Zhejiang Province, China
| | - Linglin Xu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, Zhejiang Province, China
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Honarmand Ebrahimi K, Vowles J, Browne C, McCullagh J, James WS. ddhCTP produced by the radical-SAM activity of RSAD2 (viperin) inhibits the NAD + -dependent activity of enzymes to modulate metabolism. FEBS Lett 2020; 594:1631-1644. [PMID: 32232843 DOI: 10.1002/1873-3468.13778] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 03/15/2020] [Accepted: 03/16/2020] [Indexed: 01/04/2023]
Abstract
Radical S-adenosylmethionine (SAM) domain-containing protein 2 (RSAD2; viperin) is a key enzyme in innate immune responses that is highly expressed in response to viral infection and inflammatory stimuli in many cell types. Recently, it was found that RSAD2 catalyses transformation of cytidine triphosphate (CTP) to its analogue 3'-deoxy-3',4'-didehydro-CTP (ddhCTP). The cellular function of this metabolite is unknown. Here, we analysed the extra- and intracellular metabolite levels in human induced pluripotent stem cell (hiPSC)-derived macrophages using high-resolution LC-MS/MS. The results together with biochemical assays and molecular docking simulations revealed that ddhCTP inhibits the NAD+ -dependent activity of enzymes including that of the housekeeping enzyme glyceraldehyde 3-phosphate dehydrogenase (GAPDH). We propose that ddhCTP regulates cellular metabolism in response to inflammatory stimuli such as viral infection, pointing to a broader function of RSAD2 than previously thought.
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Affiliation(s)
| | - Jane Vowles
- Sir William Dunn School of Pathology, University of Oxford, UK
| | - Cathy Browne
- Sir William Dunn School of Pathology, University of Oxford, UK
| | | | - William S James
- Sir William Dunn School of Pathology, University of Oxford, UK
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Investigation of Heterologously Expressed Glucose-6-Phosphate Dehydrogenase Genes in a Yeast zwf1 Deletion. Microorganisms 2020; 8:microorganisms8040546. [PMID: 32283834 PMCID: PMC7232176 DOI: 10.3390/microorganisms8040546] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 04/03/2020] [Accepted: 04/08/2020] [Indexed: 12/31/2022] Open
Abstract
Glucose-6-phosphate dehydrogenase (G6PD) is a key enzyme of the oxidative part of the pentose phosphate pathway and serves as the major source of NADPH for metabolic reactions and oxidative stress response in pro- and eukaryotic cells. We here report on a strain of the model yeast Saccharomyces cerevisiae which lacks the G6PD-encoding ZWF1 gene and displays distinct growth retardation on rich and synthetic media, as well as a strongly reduced chronological lifespan. This strain was used as a recipient to introduce plasmid-encoded heterologous G6PD genes, synthesized in the yeast codon usage and expressed under the control of the native PFK2 promotor. Complementation of the hypersensitivity of the zwf1 mutant towards hydrogen peroxide to different degrees was observed for the genes from humans (HsG6PD1), the milk yeast Kluyveromyces lactis (KlZWF1), the bacteria Escherichia coli (EcZWF1) and Leuconostoc mesenteroides (LmZWF1), as well as the genes encoding three different plant G6PD isoforms from Arabidopsis thaliana (AtG6PD1, AtG6PD5, AtG6PD6). The plastidic AtG6PD1 isoform retained its redox-sensitive activity when produced in the yeast as a cytosolic enzyme, demonstrating the suitability of this host for determination of its physiological properties. Mutations precluding the formation of a disulfide bridge in AtG6PD1 abolished its redox-sensitivity but improved its capacity to complement the yeast zwf1 deletion. Given the importance of G6PD in human diseases and plant growth, this heterologous expression system offers a broad range of applications.
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Zhao Y, Cui Y, Huang S, Yu J, Wang X, Xin D, Li X, Liu Y, Dai Y, Qi Z, Chen Q. Genome-Wide Analysis of the Glucose-6-Phosphate Dehydrogenase Family in Soybean and Functional Identification of GmG6PDH2 Involvement in Salt Stress. FRONTIERS IN PLANT SCIENCE 2020; 11:214. [PMID: 32174950 PMCID: PMC7054389 DOI: 10.3389/fpls.2020.00214] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 02/12/2020] [Indexed: 05/31/2023]
Abstract
Glucose-6-phosphate dehydrogenase (G6PDH) is known as a critical enzyme responsible for nicotinamide adenine dinucleotide phosphate (NADPH) generation in the pentose phosphate pathway (PPP), and has an essential function in modulating redox homeostasis and stress responsiveness. In the present work, we characterized the nine members of the G6PDH gene family in soybean. Phylogenic analysis and transit peptide prediction showed that these soybean G6PDHs are divided into plastidic (P) and cytosolic (Cy) isoforms. The subcellular locations of five GmG6PDHs were further verified by confocal microscopy in Arabidopsis mesophyll protoplasts. The respective GmG6PDH genes had distinct expression patterns in various soybean tissues and at different times during seed development. Among them, the Cy-G6PDHs were strongly expressed in roots, developing seeds and nodules, while the transcripts of P-G6PDHs were mainly detected in green tissues. In addition, the activities and transcripts of GmG6PDHs were dramatically stimulated by different stress treatments, including salt, osmotic and alkali. Notably, the expression levels of a cytosolic isoform (GmG6PDH2) were extraordinarily high under salt stress and correlated well with the G6PDH enzyme activities, possibly implying a crucial factor for soybean responses to salinity. Enzymatic assay of recombinant GmG6PDH2 proteins expressed in Escherichia coli showed that the enzyme encoded by GmG6PDH2 had functional NADP+-dependent G6PDH activity. Further analysis indicated overexpression of GmG6PDH2 gene could significantly enhance the resistance of transgenic soybean to salt stress by coordinating with the redox states of ascorbic acid and glutathione pool to suppress reactive oxygen species generation. Together, these results indicate that GmG6PDH2 might be the major isoform for NADPH production in PPP, which is involved in the modulation of cellular AsA-GSH cycle to prevent the oxidative damage induced by high salinity.
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Affiliation(s)
- Ying Zhao
- College of Agriculture, Northeast Agricultural University, Harbin, China
| | - Yifan Cui
- College of Agriculture, Northeast Agricultural University, Harbin, China
| | - Shiyu Huang
- College of Agriculture, Northeast Agricultural University, Harbin, China
| | - Jingyao Yu
- College of Agriculture, Northeast Agricultural University, Harbin, China
| | - Xinyu Wang
- College of Agriculture, Northeast Agricultural University, Harbin, China
| | - Dawei Xin
- College of Agriculture, Northeast Agricultural University, Harbin, China
| | - Xin Li
- Key Lab of Maize Genetics and Breeding, Heilongjiang Academy of Agricultural Sciences, Harbin, China
| | - Yonghui Liu
- College of Agriculture, Northeast Agricultural University, Harbin, China
| | - Yuxin Dai
- College of Agriculture, Northeast Agricultural University, Harbin, China
| | - Zhaoming Qi
- College of Agriculture, Northeast Agricultural University, Harbin, China
| | - Qingshan Chen
- College of Agriculture, Northeast Agricultural University, Harbin, China
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46
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ABA and sucrose co-regulate strawberry fruit ripening and show inhibition of glycolysis. Mol Genet Genomics 2019; 295:421-438. [PMID: 31807909 DOI: 10.1007/s00438-019-01629-w] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 11/25/2019] [Indexed: 12/21/2022]
Abstract
Abscisic acid (ABA) and sucrose play an important role in strawberry fruit ripening, but how ABA and sucrose co-regulate this ripening progress remains unclear. The intention of this study was to examine the effect of ABA and sucrose on strawberry fruit ripening and to evaluate the ABA/sucrose interaction mechanism on the strawberry fruit ripening process. Here, we report that there is an acute synergistic effect between ABA and sucrose in accelerating strawberry fruit ripening. The time frame of fruit development and ripening was shortened after the application of ABA, sucrose, and ABA + sucrose, but most of the major quality parameters in treated-ripe fruit, including fruit weight, total soluble solids, anthocyanin, ascorbic acid, the total phenolic content, lightness (L*), chroma (C*), and hue angle (h°) values were not affected. Meanwhile, the endogenous ABA and sucrose levels, and the expression of ABA and sucrose signaling genes and ripening-related genes, such as NCED1, NCED2, SnRK2.2, SuSy, MYB5, CEL1, and CEL2, was all significantly enhanced by ABA or sucrose treatment alone, but in particular, by the ABA + sucrose treatment. Therefore, improving the ripening regulation efficiency is one synergetic action of ABA/sucrose. Another synergetic action of ABA/sucrose shows that a short inhibition of glycolysis occurs during accelerated strawberry ripening. ABA and sucrose can induce higher accumulation of H2O2, leading to a transient decrease in glycolysis. Conversely, lower endogenous H2O2 levels caused by reduced glutathione (GSH) treatment resulted in a transient increase in glycolysis while delaying strawberry fruit ripening. Collectively, this study demonstrates that the ABA/sucrose interaction affects the ripening regulation efficiency and shows inhibition of glycolysis.
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Critical Roles of the Pentose Phosphate Pathway and GLN3 in Isobutanol-Specific Tolerance in Yeast. Cell Syst 2019; 9:534-547.e5. [DOI: 10.1016/j.cels.2019.10.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 08/23/2019] [Accepted: 10/18/2019] [Indexed: 02/01/2023]
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48
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Li H, Tian S, Qin G. NADPH Oxidase Is Crucial for the Cellular Redox Homeostasis in Fungal Pathogen Botrytis cinerea. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2019; 32:1508-1516. [PMID: 31230563 DOI: 10.1094/mpmi-05-19-0124-r] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
During interactions, both plants and pathogens produce reactive oxygen species (ROS). Plants generate ROS for defense induction, while pathogens synthesize ROS for growth, sporulation, and virulence. NADPH oxidase (NOX) complex in the plasma membrane represents a main protein complex for ROS production in pathogens. Although NOX plays a crucial role in pathogenicity of pathogens, the underlying molecular mechanisms of NOX, especially the proteins regulated by NOX, remain largely unknown. Here, we applied an iodoacetyl tandem mass tag-based redox proteomic assay to investigate the protein redox dynamics in deletion mutant of bcnoxR, which encodes a regulatory subunit of NOX in the fungal pathogen Botrytis cinerea. In total, 214 unique peptidyl cysteine (Cys) thiols from 168 proteins were identified and quantified in both the wild type and ∆bcnoxR mutant. The Cys thiols in the ∆bcnoxR mutant were generally more oxidized than those in the wild type, suggesting that BcNoxR is essential for maintaining the equilibrium of the redox state in B. cinerea. Site-specific thiol oxidation analysis indicated that 142 peptides containing the oxidized thiols changed abundance significantly in the ∆bcnoxR mutant. Proteins containing these differential peptides are classified into various functional categories. Functional analysis revealed that one of these proteins, 6-phosphate dehydrogenase, played roles in oxidative stress response and pathogenesis of B. cinerea. These results provide insight into the potential target proteins and the ROS signal transduction pathway regulated by NOX.
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Affiliation(s)
- Hua Li
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shiping Tian
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Key Laboratory of Post-Harvest Handing of Fruits, Ministry of Agriculture of China, Hangzhou 310021, China
| | - Guozheng Qin
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- Key Laboratory of Post-Harvest Handing of Fruits, Ministry of Agriculture of China, Hangzhou 310021, China
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Michailidis M, Karagiannis E, Polychroniadou C, Tanou G, Karamanoli K, Molassiotis A. Metabolic features underlying the response of sweet cherry fruit to postharvest UV-C irradiation. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 144:49-57. [PMID: 31557639 DOI: 10.1016/j.plaphy.2019.09.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 09/17/2019] [Accepted: 09/18/2019] [Indexed: 06/10/2023]
Abstract
The impact of ultraviolet-C (UV-C) irradiation on sweet cherry fruit was studied. Following harvest, fruits (cv. Sweetheart) were exposed to different doses of UV-C (0, 1.2, 3.0 or 6.0 kJ m-2) and then cold stored (0 °C) for 10 days. Treatments with UV-C delayed most ripening features and reduced pitting symptoms, particularly following prolonged UV-C application. Also, application of the highest UV-C dose inhibited pectin degradation and delayed skin resistance to penetration. An activation of antioxidants capacity and bioactive compounds, such as flavonoids and phenolics was observed. Illumination with UV-C diminished respiration and altered metabolite profile in whole fruit and skin samples. Several amino acids (eg., threonine and aspartate), sugars, (eg., glucose and fructose) and alcohols (e.g., inositol and mannitol) were modulated by long-term UV-C treatment in whole cherry fruit. Various metabolites, including malate, galacturonate, oxoproline and glutamine were also modulated by UV-C skin tissue. These data enhance our understanding of UV-C function in fruit biology.
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Affiliation(s)
- Michail Michailidis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Evangelos Karagiannis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Chrysanthi Polychroniadou
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Georgia Tanou
- Institute of Soil and Water Resources, ELGO-DEMETER, Thessaloniki, 57001, Greece
| | - Katerina Karamanoli
- Laboratory of Agricultural Chemistry, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Athanassios Molassiotis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece.
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50
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Zhou G, Peng H, Wang YS, Li CL, Shen PF, Huang XM, Xie XB, Shi QS. Biological functions of nirS in Pseudomonas aeruginosa ATCC 9027 under aerobic conditions. J Ind Microbiol Biotechnol 2019; 46:1757-1768. [PMID: 31512096 DOI: 10.1007/s10295-019-02232-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Accepted: 08/23/2019] [Indexed: 01/10/2023]
Abstract
Through our previous study, we found an up-regulation in the expression of nitrite reductase (nirS) in the isothiazolone-resistant strain of Pseudomonas aeruginosa. However, the definitive molecular role of nirS in ascribing the resistance remained elusive. In the present study, the nirS gene was deleted from the chromosome of P. aeruginosa ATCC 9027 and the resulting phenotypic changes of ΔnirS were studied alongside the wild-type (WT) strain under aerobic conditions. The results demonstrated a decline in the formations of biofilms but not planktonic growth by ΔnirS as compared to WT, especially in the presence of benzisothiazolinone (BIT). Meanwhile, the deletion of nirS impaired swimming motility of P. aeruginosa under the stress of BIT. To assess the influence of nirS on the transcriptome of P. aeruginosa, RNA-seq experiments comparing the ΔnirS with WT were also performed. A total of 694 genes were found to be differentially expressed in ΔnirS, of which 192 were up-regulated, while 502 were down-regulated. In addition, these differently expressed genes were noted to significantly enrich the carbon metabolism along with glyoxylate and dicarboxylate metabolisms. Meanwhile, results from RT-PCR suggested the contribution of mexEF-oprN to the development of BIT resistance by ΔnirS. Further, c-di-GMP was less in ΔnirS than in WT, as revealed by HPLC. Taken together, our results confirm that nirS of P. aeruginosa ATCC 9027 plays a role in BIT resistance along with biofilm formation and further affects several metabolic patterns under aerobic conditions.
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Affiliation(s)
- Gang Zhou
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, Guangdong, People's Republic of China
| | - Hong Peng
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, Guangdong, People's Republic of China
| | - Ying-Si Wang
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, Guangdong, People's Republic of China
| | - Cai-Ling Li
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, Guangdong, People's Republic of China
| | - Peng-Fei Shen
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, Guangdong, People's Republic of China
| | - Xiao-Mo Huang
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, Guangdong, People's Republic of China
| | - Xiao-Bao Xie
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, Guangdong, People's Republic of China.
| | - Qing-Shan Shi
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, Guangdong, People's Republic of China.
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