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Grandal B, Evrevin C, Laas E, Jardin I, Rozette S, Laot L, Dumas E, Coussy F, Pierga JY, Brain E, Saule C, Stoppa-Lyonnet D, Frank S, Sénéchal C, Lae M, De Croze D, Bataillon G, Guerin J, Reyal F, Hamy AS. Impact of BRCA Mutation Status on Tumor Infiltrating Lymphocytes (TILs), Response to Treatment, and Prognosis in Breast Cancer Patients Treated with Neoadjuvant Chemotherapy. Cancers (Basel) 2020; 12:cancers12123681. [PMID: 33302444 PMCID: PMC7764707 DOI: 10.3390/cancers12123681] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 12/01/2020] [Accepted: 12/03/2020] [Indexed: 12/13/2022] Open
Abstract
INTRODUCTION Five to 10% of breast cancers (BCs) occur in a genetic predisposition context (mainly BRCA pathogenic variant). Nevertheless, little is known about immune tumor infiltration, response to neoadjuvant chemotherapy (NAC), pathologic complete response (pCR) and adverse events according to BRCA status. MATERIAL AND METHODS Out of 1199 invasive BC patients treated with NAC between 2002 and 2012, we identified 267 patients tested for a germline BRCA pathogenic variant. We evaluated pre-NAC and post-NAC immune infiltration (TILs). Response to chemotherapy was assessed by pCR rates. Association of clinical and pathological factors with TILs, pCR and survival was assessed by univariate and multivariate analyses. RESULTS Among 1199 BC patients: 46 were BRCA-deficient and 221 BRCA-proficient or wild type (WT). At NAC completion, pCR was observed in 84/266 (31%) patients and pCR rates were significantly higher in BRCA-deficient BC (p = 0.001), and this association remained statistically significant only in the luminal BC subtype (p = 0.006). The interaction test between BC subtype and BRCA status was nearly significant (Pinteraction = 0.056). Pre and post-NAC TILs were not significantly different between BRCA-deficient and BRCA-proficient carriers; however, in the luminal BC group, post-NAC TILs were significantly higher in BRCA-deficient BC. Survival analysis were not different between BRCA-carriers and non-carriers. CONCLUSIONS BRCA mutation status is associated with higher pCR rates and post-NAC TILs in patients with luminal BC. BRCA-carriers with luminal BCs may represent a subset of patients deriving higher benefit from NAC. Second line therapies, including immunotherapy after NAC, could be of interest in non-responders to NAC.
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Affiliation(s)
- Beatriz Grandal
- Department of Surgery, Institut Curie, University Paris, 75005 Paris, France; (B.G.); (C.E.); (E.L.); (I.J.); (S.R.); (L.L.)
- Residual Tumor & Response to Treatment Laboratory, RT2Lab, Translational Research Department, INSERM, U932 Immunity and Cancer, Institut Curie, 26 rue d’Ulm, 75005 Paris, France; (E.D.); (A.-S.H.)
| | - Clémence Evrevin
- Department of Surgery, Institut Curie, University Paris, 75005 Paris, France; (B.G.); (C.E.); (E.L.); (I.J.); (S.R.); (L.L.)
| | - Enora Laas
- Department of Surgery, Institut Curie, University Paris, 75005 Paris, France; (B.G.); (C.E.); (E.L.); (I.J.); (S.R.); (L.L.)
| | - Isabelle Jardin
- Department of Surgery, Institut Curie, University Paris, 75005 Paris, France; (B.G.); (C.E.); (E.L.); (I.J.); (S.R.); (L.L.)
| | - Sonia Rozette
- Department of Surgery, Institut Curie, University Paris, 75005 Paris, France; (B.G.); (C.E.); (E.L.); (I.J.); (S.R.); (L.L.)
| | - Lucie Laot
- Department of Surgery, Institut Curie, University Paris, 75005 Paris, France; (B.G.); (C.E.); (E.L.); (I.J.); (S.R.); (L.L.)
| | - Elise Dumas
- Residual Tumor & Response to Treatment Laboratory, RT2Lab, Translational Research Department, INSERM, U932 Immunity and Cancer, Institut Curie, 26 rue d’Ulm, 75005 Paris, France; (E.D.); (A.-S.H.)
| | - Florence Coussy
- Department of Oncology, Institut Curie, 26 rue d’Ulm, 75005 Paris, France; (F.C.); (J.-Y.P.)
| | - Jean-Yves Pierga
- Department of Oncology, Institut Curie, 26 rue d’Ulm, 75005 Paris, France; (F.C.); (J.-Y.P.)
| | - Etienne Brain
- Department of Oncology, Centre René Huguenin, Institut Curie, 35 rue Dailly, 92210 St Cloud, France;
| | - Claire Saule
- Department of Genetics, Institut Curie, 26 rue d’Ulm, 75005 Paris, France; (C.S.); (D.S.-L.); (S.F.)
| | - Dominique Stoppa-Lyonnet
- Department of Genetics, Institut Curie, 26 rue d’Ulm, 75005 Paris, France; (C.S.); (D.S.-L.); (S.F.)
| | - Sophie Frank
- Department of Genetics, Institut Curie, 26 rue d’Ulm, 75005 Paris, France; (C.S.); (D.S.-L.); (S.F.)
| | - Claire Sénéchal
- Department of Genetics, Institut Bergonié, 229 Cours de l’Argonne, 33000 Bordeaux, France;
| | - Marick Lae
- Department of Pathology, Centre René Huguenin, Institut Curie, 35 rue Dailly, 92210 St Cloud, France; (M.L.); (D.D.C.)
- Department of Pathology, Centre Henri Becquerel, INSERM U1245, UNIROUEN, University of Normandie, 76038 Rouen, France
| | - Diane De Croze
- Department of Pathology, Centre René Huguenin, Institut Curie, 35 rue Dailly, 92210 St Cloud, France; (M.L.); (D.D.C.)
| | | | - Julien Guerin
- Data Office, Institut Curie, 25 rue d’Ulm, 75005 Paris, France;
| | - Fabien Reyal
- Department of Surgery, Institut Curie, University Paris, 75005 Paris, France; (B.G.); (C.E.); (E.L.); (I.J.); (S.R.); (L.L.)
- Residual Tumor & Response to Treatment Laboratory, RT2Lab, Translational Research Department, INSERM, U932 Immunity and Cancer, Institut Curie, 26 rue d’Ulm, 75005 Paris, France; (E.D.); (A.-S.H.)
- Correspondence: ; Tel.: +33-144324660; Fax: +33-153104037
| | - Anne-Sophie Hamy
- Residual Tumor & Response to Treatment Laboratory, RT2Lab, Translational Research Department, INSERM, U932 Immunity and Cancer, Institut Curie, 26 rue d’Ulm, 75005 Paris, France; (E.D.); (A.-S.H.)
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152
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Meryk A, Grasse M, Balasco L, Kapferer W, Grubeck-Loebenstein B, Pangrazzi L. Antioxidants N-Acetylcysteine and Vitamin C Improve T Cell Commitment to Memory and Long-Term Maintenance of Immunological Memory in Old Mice. Antioxidants (Basel) 2020; 9:E1152. [PMID: 33228213 DOI: 10.3390/antiox9111152] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/16/2020] [Accepted: 11/18/2020] [Indexed: 12/17/2022] Open
Abstract
Aging is characterized by reduced immune responses, a process known as immunosenescence. Shortly after their generation, antigen-experienced adaptive immune cells, such as CD8+ and CD4+ T cells, migrate into the bone marrow (BM), in which they can be maintained for long periods of time within survival niches. Interestingly, we recently observed how oxidative stress may negatively support the maintenance of immunological memory in the BM in old age. To assess whether the generation and maintenance of immunological memory could be improved by scavenging oxygen radicals, we vaccinated 18-months (old) and 3-weeks (young) mice with alum-OVA, in the presence/absence of antioxidants vitamin C (Vc) and/or N-acetylcysteine (NAC). To monitor the phenotype of the immune cell population, blood was withdrawn at several time-points, and BM and spleen were harvested 91 days after the first alum-OVA dose. Only in old mice, memory T cell commitment was boosted with some antioxidant treatments. In addition, oxidative stress and the expression of pro-inflammatory molecules decreased in old mice. Finally, changes in the phenotype of dendritic cells, important regulators of T cell activation, were additionally observed. Taken together, our data show that the generation and maintenance of memory T cells in old age may be improved by targeting oxidative stress.
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153
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Devi N, Boya C, Chhabra M, Bansal D. N-acetyl-cysteine as adjuvant therapy in female infertility: a systematic review and meta-analysis. J Basic Clin Physiol Pharmacol 2020; 32:899-910. [PMID: 34592079 DOI: 10.1515/jbcpp-2020-0107] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 08/22/2020] [Indexed: 12/12/2022]
Abstract
OBJECTIVES The objective of this study is to explore the efficacy and safety of N-acetyl-cysteine (NAC) as adjuvant therapy in female infertility. CONTENT We performed a systematic literature search of PubMed, Cochrane Library, Embase, and Ovid databases through April 2019 for Randomized Controlled Trials (RCTs) evaluating the effectiveness and safety of NAC as adjuvant therapy in female infertility. The outcomes assessed were rates of ovulation, pregnancy, miscarriage and multiple pregnancy, presented as pooled odds ratio with 95% confidence interval (CI) using the random-effects model. Heterogeneity and inconsistency of the measurements were identified through Cochrane's Q statistic and I2 statistic. We also performed a sensitivity analysis, publication bias (using funnel plot and Begg's test), and subgroup analysis. SUMMARY Fifteen RCTs recruiting 2330 female receiving NAC were included. The pooled estimate showed the statistically insignificant improvement in outcomes; clinical pregnancy rate 1.55 (95% CI 0.98-2.47; I2=68%; p<0.01), ovulation rate 1.77 (95% CI 0.76-4.14; I2=90%; p<0.01), multiple pregnancy rate 0.83 (95% CI 0.34-1.99; I2=10%; p=0.31) and miscarriage rate 0.76 (95% CI= 0.37, 1.53; I2=0%; p=0.69) . NAC was found less efficacious and safe than metformin in all outcomes. Overall, NAC showed statistically insignificant (OR=0.98-2.47). OUTLOOK NAC can be an effective adjuvant in PCOS related and unexplained female infertility. The effect could be more profound in women with high BMI, insulin resistance, and oxidative stress. However, the findings need further confirmation in well-designed randomized controlled trials to examine clinical outcomes such as live birth rate in more extended follow-up periods.
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Affiliation(s)
- Nagita Devi
- Pharmacy Practice, National Institute of Pharmaceutical Education and Research, SAS Nagar, India
| | - Chandrasekhar Boya
- Pharmacy Practice, National Institute of Pharmaceutical Education and Research, SAS Nagar, India
| | - Manik Chhabra
- Pharmacy Practice, National Institute of Pharmaceutical Education and Research, SAS Nagar, India
| | - Dipika Bansal
- Pharmacy Practice, National Institute of Pharmaceutical Education and Research, SAS Nagar, India
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154
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Carrillo-Bermejo EA, Gamboa-Tuz SD, Pereira-Santana A, Keb-Llanes MA, Castaño E, Figueroa-Yañez LJ, Rodriguez-Zapata LC. The SoNAP gene from sugarcane (Saccharum officinarum) encodes a senescence-associated NAC transcription factor involved in response to osmotic and salt stress. J Plant Res 2020; 133:897-909. [PMID: 33094397 DOI: 10.1007/s10265-020-01230-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 10/08/2020] [Indexed: 06/11/2023]
Abstract
Climate change has caused serious problems related to the productivity of agricultural crops directly affecting human well-being. Plants have evolved to produce molecular mechanisms in response to environmental stresses, such as transcription factors (TFs), to cope with abiotic stress. The NAC proteins constitute a plant-specific family of TFs involved in plant development processes and tolerance to biotic and abiotic stress. Sugarcane is a perennial grass that accumulates a large amount of sucrose and is a crucial agro-industry crop in tropical regions. Our previous transcriptome analyses on sugarcane that were exposed to drought conditions revealed significant increases in the expression of several NAC TFs through all of the time-point stress conditions. In this work, we characterize all previously detected sugarcane NAC genes, utilizing phylogenetics and expression analyses. Furthermore, we characterized a sugarcane NAC gene orthologous to the senescence-associated genes AtNAP and OsNAP via transient expression in tobacco calluses, from Arabidopsis and rice respectively, thus we named it the SoNAP gene. Transient localization assays on onion epidermal cells confirmed the nuclear localization of the SoNAP. Expression analysis showed that the SoNAP gene was induced by high salinity, drought, and abscisic acid treatments. The overexpression of the SoNAP gene in tobacco calluses caused a senescence associated phenotype. Overall, our results indicated that the SoNAP gene from sugarcane is transcriptionally induced under abiotic stress conditions and conserved the predicted senescence-associated functions when it was overexpressed in a heterologous plant model. This work provides key insights about the senescence mechanisms related to abiotic stress and it provides a benchmark for future work on the improvement of this economically important crop.
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Affiliation(s)
| | - Samuel David Gamboa-Tuz
- Biotechnology Unit, Centro de Investigacion Cientifica de Yucatan, 97205, Mérida, Yucatan, Mexico
| | - Alejandro Pereira-Santana
- Industrial Biotechnology Unit, Centro de Investigacion y Asistencia en Tecnologia y Diseño del Estado de Jalisco, Zapopan, Jalisco, Mexico
- Direccion de Catedras, Consejo Nacional de Ciencia y Tecnologia, Ciudad de Mexico, Mexico
| | - Miguel A Keb-Llanes
- Biotechnology Unit, Centro de Investigacion Cientifica de Yucatan, 97205, Mérida, Yucatan, Mexico
| | - Enrique Castaño
- Plant Biochemistry and Molecular Biology Unit, Centro de Investigacion Cientifica de Yucatan, 97205, Mérida, Yucatán, Mexico
| | - Luis Joel Figueroa-Yañez
- Industrial Biotechnology Unit, Centro de Investigacion y Asistencia en Tecnologia y Diseño del Estado de Jalisco, Zapopan, Jalisco, Mexico.
| | - Luis C Rodriguez-Zapata
- Biotechnology Unit, Centro de Investigacion Cientifica de Yucatan, 97205, Mérida, Yucatan, Mexico.
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155
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El-Sheref EM, Aly AA, Alshammari MB, Brown AB, Abdel-Hafez SMN, Abdelzaher WY, Bräse S, Abdelhafez EMN. Design, Synthesis, Molecular Docking, Antiapoptotic and Caspase-3 Inhibition of New 1,2,3-Triazole/ Bis-2(1 H)-Quinolinone Hybrids. Molecules 2020; 25:E5057. [PMID: 33143331 PMCID: PMC7672604 DOI: 10.3390/molecules25215057] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 10/22/2020] [Accepted: 10/22/2020] [Indexed: 12/29/2022] Open
Abstract
A series of novel 1,2,3-triazoles hybridized with two quinolin-2-ones, was designed and synthesized through click reactions. The structures of the synthesized compounds were elucidated by NMR, IR, and mass spectra in addition to elemental analysis. The synthesized compounds were assessed for their antiapoptotic activity in testis, as testicular torsion is the main cause of male infertility. This effect was studied in light of decreasing tissue damage induced by I/R in the testis of rats using N-acetylcysteine (NAC) as an antiapoptotic reference. Compounds 6a-c were the most active antiapoptotic hybrids with significant measurements for malondialdehyde (MDA) and total antioxidant capacity (TAC) and the apoptotic biomarkers (testicular testosterone, TNFα, and caspase-3) in comparison to the reference. A preliminary mechanistic study was performed to improve the antiapoptotic activity through caspase-3 inhibition. A compound assigned as 6-methoxy-4-(4-(((2-oxo-1,2-dihydroquinolin-4-yl)oxy)methyl)-1H-1,2,3-triazol-1-yl)quinolin-2(1H)-one (6c) was selected as a representative of the most active hybrids in comparison to NAC. Assay of cytochrome C for 6c revealed an attenuation of cytochrome C level about 3.54 fold, comparable to NAC (4.13 fold). In caspases-3,8,9 assays, 6c was found to exhibit more potency and selectivity toward caspase-3 than other caspases. The testicular histopathological investigation was carried out on all targeted compounds 6a-g, indicating a significant improvement in the spermatogenesis process for compounds 6a-c if compared to the reference relative to the control. Finally, molecular docking studies were done at the caspase-3 active site to suggest possible binding modes. Hence, it could conceivably be hypothesized that compounds 6a-c could be considered good lead candidate compounds as antiapoptotic agents.
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Affiliation(s)
- Essmat M. El-Sheref
- Chemistry Department, Faculty of Science, Minia University, El-Minia 61519, Egypt;
| | - Ashraf A. Aly
- Chemistry Department, Faculty of Science, Minia University, El-Minia 61519, Egypt;
| | - Mohammed B. Alshammari
- College of Sciences and Humanities, Prince Sattam bin Abdulaziz University, Alkharj 11942, Saudi Arabia;
| | - Alan B. Brown
- Florida Institute of Technology, 150 W University Blvd, Melbourne, FL 32901, USA;
| | | | | | - Stefan Bräse
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
- Institute of Biological and Chemical Systems (IBCS-FMS), Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
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156
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Zhang Z, Lin YA, Kim SY, Su L, Liu J, Kannan RM, Kannan S. Systemic dendrimer-drug nanomedicines for long-term treatment of mild-moderate cerebral palsy in a rabbit model. J Neuroinflammation 2020; 17:319. [PMID: 33100217 PMCID: PMC7586697 DOI: 10.1186/s12974-020-01984-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 10/05/2020] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Neuroinflammation mediated by microglia plays a central role in the pathogenesis of perinatal/neonatal brain injury, including cerebral palsy (CP). Therapeutics mitigating neuroinflammation potentially provide an effective strategy to slow the disease progression and rescue normal brain development. Building on our prior results which showed that a generation-4 hydroxyl poly(amidoamine) (PAMAM) dendrimer could deliver drugs specifically to activated glia from systemic circulation, we evaluated the sustained efficacy of a generation-6 (G6) hydroxyl-terminated PAMAM dendrimer that showed a longer blood circulation time and increased brain accumulation. N-acetyl-L-cysteine (NAC), an antioxidant and anti-inflammatory agent that has high plasma protein binding properties and poor brain penetration, was conjugated to G6-PAMAM dendrimer-NAC (G6D-NAC). The efficacy of microglia-targeted G6D-NAC conjugate was evaluated in a clinically relevant rabbit model of CP, with a mild/moderate CP phenotype to provide a longer survival of untreated CP kits, enabling the assessment of sustained efficacy over 15 days of life. METHODS G6D-NAC was conjugated and characterized. Cytotoxicity and anti-inflammatory assays were performed in BV-2 microglial cells. The efficacy of G6D-NAC was evaluated in a rabbit model of CP. CP kits were randomly divided into 5 groups on postnatal day 1 (PND1) and received an intravenous injection of a single dose of PBS, or G6D-NAC (2 or 5 mg/kg), or NAC (2 or 5 mg/kg). Neurobehavioral tests, microglia morphology, and neuroinflammation were evaluated at postnatal day 5 (PND5) and day 15 (PND15). RESULTS A single dose of systemic 'long circulating' G6D-NAC showed a significant penetration across the impaired blood-brain-barrier (BBB), delivered NAC specifically to activated microglia, and significantly reduced microglia-mediated neuroinflammation in both the cortex and cerebellum white matter areas. Moreover, G6D-NAC treatment significantly improved neonatal rabbit survival rate and rescued motor function to nearly healthy control levels at least up to 15 days after birth (PND15), while CP kits treated with free NAC died before PND9. CONCLUSIONS Targeted delivery of therapeutics to activated microglia in neonatal brain injury can ameliorate pro-inflammatory microglial responses to injury, promote survival rate, and improve neurological outcomes that can be sustained for a long period. Appropriate manipulation of activated microglia enabled by G6D-NAC can impact the injury significantly beyond inflammation.
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Affiliation(s)
- Zhi Zhang
- Department of Anesthesiology and Critical Care, Johns Hopkins School of Medicine, Baltimore, MD, USA
- Present address: Department of Natural Sciences, University of Michigan-Dearborn, Dearborn, MI, USA
| | - Yi-An Lin
- Center for Nanomedicine, Wilmer Eye Institute, Johns Hopkins School of Medicine, 400 North Broadway, Baltimore, MD, 21287, USA
| | - Soo-Young Kim
- Center for Nanomedicine, Wilmer Eye Institute, Johns Hopkins School of Medicine, 400 North Broadway, Baltimore, MD, 21287, USA
| | - Lilly Su
- Department of Anesthesiology and Critical Care, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Jinhuan Liu
- Department of Anesthesiology and Critical Care, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Rangaramanujam M Kannan
- Center for Nanomedicine, Wilmer Eye Institute, Johns Hopkins School of Medicine, 400 North Broadway, Baltimore, MD, 21287, USA.
| | - Sujatha Kannan
- Department of Anesthesiology and Critical Care, Johns Hopkins School of Medicine, Baltimore, MD, USA.
- Department of Anesthesiology and Critical Care Medicine, Charlotte Bloomberg Children's Center 6318D, 1800 Orleans Street, Baltimore, MD, 21287, USA.
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157
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Balan DJ, Rajavel T, Das M, Sathya S, Jeyakumar M, Devi KP. Thymol induces mitochondrial pathway-mediated apoptosis via ROS generation, macromolecular damage and SOD diminution in A549 cells. Pharmacol Rep 2020; 73:240-254. [PMID: 33095436 DOI: 10.1007/s43440-020-00171-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 10/01/2020] [Accepted: 10/07/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND Thymol is a monoterpene phenol found in thyme species plants. The present study was carried out to investigate the effect of thymol and its molecular mechanism on non-small lung cancer (A549) cells. METHODS The cytotoxic effect of thymol on A549 cells was assessed via MTT assay. ROS production, macromolecular damage, apoptosis were determined using DCF-DA, PI, AO/EtBr stains, respectively. ROS-dependent effect of thymol was confirmed using NAC. The expression of caspase-9, Bcl-2, Bax and cell cycle profile was analyzed via western blot and FACS, respectively. RESULTS The antiproliferative effect of thymol on A549 cells was found to be both dose and time dependent with IC50 values of 112 μg/ml (745 μM) at 24 h. Thymol treatment favored apoptotic cell death and caused G0/G1 cell cycle arrest. It mediated cellular and nuclear morphological changes, phosphatidylserine translocation, and mitochondrial membrane depolarization. Additionally, upregulation of Bax, downregulation of Bcl-2, and apoptotic fragmented DNA were also observed. Thymol induced ROS by reducing the SOD level which was confirmed via in vitro and in silico analysis. Furthermore, the levels of lipid peroxides and protein carbonyl content were elevated in thymol-treated groups. Notably, N-acetyl cysteine pretreatment reversed the efficacy of thymol on A549 cells. Moreover, thymol-treated human PBMC cells did not show any significant cytotoxicity. CONCLUSION Overall, our results confirmed that thymol can act as a safe and potent therapeutic agent to treat NSCLC.
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Affiliation(s)
- Devasahayam Jaya Balan
- Department of Biotechnology, Alagappa University [Science Campus], Karaikudi, Tamil Nadu, 630 003, India
| | - Tamilselvam Rajavel
- Department of Biotechnology, Alagappa University [Science Campus], Karaikudi, Tamil Nadu, 630 003, India.,Department of Biochemistry and Molecular Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Mamali Das
- Department of Biotechnology, Alagappa University [Science Campus], Karaikudi, Tamil Nadu, 630 003, India
| | - Sethuraman Sathya
- Department of Biotechnology, Alagappa University [Science Campus], Karaikudi, Tamil Nadu, 630 003, India
| | - Mahalingam Jeyakumar
- Department of Biotechnology, Alagappa University [Science Campus], Karaikudi, Tamil Nadu, 630 003, India
| | - Kasi Pandima Devi
- Department of Biotechnology, Alagappa University [Science Campus], Karaikudi, Tamil Nadu, 630 003, India.
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158
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Bandini M, Pederzoli F, Madison R, Briganti A, Ross JS, Niegisch G, Yu EY, Bamias A, Agarwal N, Sridhar SS, Rosenberg JE, Bellmunt J, Pal SK, Galsky MD, Lucianò R, Gallina A, Salonia A, Montorsi F, Ali SM, Chung JH, Necchi A. Unfavorable Cancer-specific Survival After Neoadjuvant Chemotherapy and Radical Cystectomy in Patients With Bladder Cancer and Squamous Cell Variant: A Multi-institutional Study. Clin Genitourin Cancer 2020; 18:e543-e556. [PMID: 32144050 PMCID: PMC8491463 DOI: 10.1016/j.clgc.2020.01.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 01/13/2020] [Accepted: 01/30/2020] [Indexed: 01/19/2023]
Abstract
BACKGROUND Nonurothelial carcinoma (UC) malignancies have traditionally been considered to have a more aggressive clinical course, and little is known about their response to neoadjuvant therapy. We examined the effect of neoadjuvant chemotherapy (NAC) on a large population of patients with bladder cancer (BCa) with different histologic variants (HVs). PATIENTS AND METHODS We relied on a retrospective, multicenter database of 2858 patients with BCa who had undergone radical cystectomy with or without NAC from 1990 to 2017. Pure and mixed HVs were grouped into 6 categories: squamous cell carcinoma (SCC; n = 283; 45%), other subtypes (n = 95; 15%), micropapillary (n = 85; 14%), adenocarcinoma (n = 65; 10%), small cell (n = 54; 8.6%), and sarcomatous (n = 47; 7.6%). Kaplan-Meier and Cox regression analyses were used to examine cancer-specific survival (CSS) according to the HV, using pure UC as the reference. Logistic regression models were used to examine the odds of clinical-to-pathologic downstaging after NAC according to the HV. RESULTS Overall, we identified 2229 cases of pure UC and 629 cases of BCa with HVs at radical cystectomy. Of the 450 NAC-treated patients, only those patients with SCC (n = 44; 9.8%) had had worse CSS (median CSS, 33 vs. 116 months; P < .001) and higher mortality rates (hazard ratio, 2.1; P = .03) compared with those with pure UC (n = 328; 72.9%). The results of the analyses were also confirmed when the pure and mixed cases were considered separately. After adjusting for NAC, only SCC showed a lower rate of clinical-to-pathologic downstaging (odds ratio, 0.4; P = .03) compared with UC. CONCLUSIONS SCC was the HV exhibiting the lowest effect of NAC in terms of activity and CSS. Compared with pure UC, SCC seemed to be insensitive to traditional NAC regimens.
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Affiliation(s)
- Marco Bandini
- Urological Research Institute, Unit of Urology, IRCCS Ospedale San Raffaele, Vita-Salute San Raffaele University, Milan, Italy.
| | - Filippo Pederzoli
- Urological Research Institute, Unit of Urology, IRCCS Ospedale San Raffaele, Vita-Salute San Raffaele University, Milan, Italy
| | | | - Alberto Briganti
- Urological Research Institute, Unit of Urology, IRCCS Ospedale San Raffaele, Vita-Salute San Raffaele University, Milan, Italy
| | - Jeffrey S Ross
- Foundation Medicine, Cambridge, MA; Upstate Medical University, Syracuse, NY
| | - Günter Niegisch
- Department of Urology, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany
| | - Evan Y Yu
- Fred Hutchinson Cancer Research Center, University of Washington, Seattle, WA
| | | | - Neeraj Agarwal
- Huntsman Cancer Institute, University of Utah, Salt Lake, UT
| | - Srikala S Sridhar
- Cancer Clinical Research Unit, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | | | - Joaquim Bellmunt
- Bladder Cancer Center, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA
| | | | - Matthew D Galsky
- Tisch Cancer Institute, Mount Sinai School of Medicine, New York, NY
| | - Roberta Lucianò
- Department of Pathology, Ospedale San Raffaele, Milan, Italy
| | - Andrea Gallina
- Urological Research Institute, Unit of Urology, IRCCS Ospedale San Raffaele, Vita-Salute San Raffaele University, Milan, Italy
| | - Andrea Salonia
- Urological Research Institute, Unit of Urology, IRCCS Ospedale San Raffaele, Vita-Salute San Raffaele University, Milan, Italy
| | - Francesco Montorsi
- Urological Research Institute, Unit of Urology, IRCCS Ospedale San Raffaele, Vita-Salute San Raffaele University, Milan, Italy
| | | | | | - Andrea Necchi
- Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
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Abstract
COVID-19, a respiratory disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), continues to spread across the globe. Predisposing factors such as age, diabetes, cardiovascular disease, and lowered immune function increase the risk of disease severity. T cell exhaustion, high viral load, and high levels of TNF-ɑ, IL1β, IL6, IL10 have been associated with severe SARS-CoV-2. Cytokine and antigen overstimulation are potentially responsible for poor humoral response to the virus. Lower cellular redox status, which leads to pro-inflammatory states mediated by TNF-ɑ is also potentially implicated. In vivo, in vitro, and human clinical trials have demonstrated N-acetylcysteine (NAC) as an effective method of improving redox status, especially when under oxidative stress. In human clinical trials, NAC has been used to replenish glutathione stores and increase the proliferative response of T cells. NAC has also been shown to inhibit the NLRP3 inflammasome pathway (IL1β and IL18) in vitro, and decrease plasma TNF-ɑ in human clinical trials. Mediation of the viral load could occur through NAC's ability to increase cellular redox status via maximizing the rate limiting step of glutathione synthesis, and thereby potentially decreasing the effects of virally induced oxidative stress and cell death. We hypothesize that NAC could act as a potential therapeutic agent in the treatment of COVID-19 through a variety of potential mechanisms, including increasing glutathione, improving T cell response, and modulating inflammation. In this article, we present evidence to support the use of NAC as a potential therapeutic agent in the treatment of COVID-19.
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Affiliation(s)
- Francis L Poe
- Whole Systems Research Institute, 1020 SW Taylor St Ste. 340, Portland, OR 97239, United States.
| | - Joshua Corn
- Whole Systems Research Institute, 1020 SW Taylor St Ste. 340, Portland, OR 97239, United States
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160
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Teodorof-Diedrich C, Spector SA. Human Immunodeficiency Virus Type 1 and Methamphetamine-Mediated Mitochondrial Damage and Neuronal Degeneration in Human Neurons. J Virol 2020; 94:e00924-20. [PMID: 32796068 DOI: 10.1128/JVI.00924-20] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 07/30/2020] [Indexed: 12/12/2022] Open
Abstract
Methamphetamine, a potent psychostimulant, is a highly addictive drug commonly used by persons living with HIV (PLWH), and its use can result in cognitive impairment and memory deficits long after its use is discontinued. Although the mechanism(s) involved with persistent neurological deficits is not fully known, mitochondrial dysfunction is a key component in methamphetamine neuropathology. Specific mitochondrial autophagy (mitophagy) and mitochondrial fusion and fission are protective quality control mechanisms that can be dysregulated in HIV infection, and the use of methamphetamine can further negatively affect these protective cellular mechanisms. Here, we observed that treatment of human primary neurons (HPNs) with methamphetamine and HIV gp120 and Tat increase dynamin-related protein 1 (DRP1)-dependent mitochondrial fragmentation and neuronal degeneration. Methamphetamine and HIV proteins increased microtubule-associated protein 1 light chain 3 beta-II (LC3B-II) lipidation and induced sequestosome 1 (SQSTM1, p62) translocation to damaged mitochondria. Additionally, the combination inhibited autophagic flux, increased reactive oxygen species (ROS) production and mitochondrial damage, and reduced microtubule-associated protein 2 (MAP2) dendrites in human neurons. N-Acetylcysteine (NAC), a strong antioxidant and ROS scavenger, abrogated DRP1-dependent mitochondrial fragmentation and neurite degeneration. Thus, we show that methamphetamine combined with HIV proteins inhibits mitophagy and induces neuronal damage, and NAC reverses these deleterious effects on mitochondrial function.IMPORTANCE Human and animal studies show that HIV infection, combined with the long-term use of psychostimulants, increases neuronal stress and the occurrence of HIV-associated neurocognitive disorders (HAND). On the cellular level, mitochondrial function is critical for neuronal health. In this study, we show that in human primary neurons, the combination of HIV proteins and methamphetamine increases oxidative stress, DRP1-mediated mitochondrial fragmentation, and neuronal injury manifested by a reduction in neuronal network and connectivity. The use of NAC, a potent antioxidant, reversed the neurotoxic effects of HIV and methamphetamine, suggesting a novel approach to ameliorate the effects of HIV- and methamphetamine-associated cognitive deficits.
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161
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Muniroh M. Methylmercury-induced pro-inflammatory cytokines activation and its preventive strategy using anti-inflammation N-acetyl-l-cysteine: a mini-review. Rev Environ Health 2020; 35:233-238. [PMID: 32710722 DOI: 10.1515/reveh-2020-0026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 06/09/2020] [Indexed: 06/11/2023]
Abstract
The exposure of methylmercury (MeHg) has become a public health concern because of its neurotoxic effect. Various neurological symptoms were detected in Minamata disease patients, who got intoxicated by MeHg, including paresthesia, ataxia, gait disturbance, sensory disturbances, tremors, visual, and hearing impairments, indicating that MeHg could pass the blood-brain barrier (BBB) and cause impairment of neurons and other brain cells. Previous studies have reported some expected mechanisms of MeHg-induced neurotoxicity including the neuroinflammation pathway. It was characterized by the up-regulation of numerous pro-inflammatory cytokines expression. Therefore, the use of anti-inflammatories such as N-acetyl-l-cysteine (NAC) may act as a preventive compound to protect the brain from MeHg harmful effects. This mini-review will explain detailed information on MeHg-induced pro-inflammatory cytokines activation as well as possible preventive strategies using anti-inflammation NAC to protect brain cells, particularly in in vivo and in vitro studies.
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Affiliation(s)
- Muflihatul Muniroh
- Department of Physiology, Faculty of Medicine Diponegoro University, Semarang, Central Java, 50275, Indonesia
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162
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Mathew IE, Priyadarshini R, Mahto A, Jaiswal P, Parida SK, Agarwal P. SUPER STARCHY1/O NAC025 participates in rice grain filling. Plant Direct 2020; 4:e00249. [PMID: 32995698 PMCID: PMC7507516 DOI: 10.1002/pld3.249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 06/10/2020] [Accepted: 07/10/2020] [Indexed: 05/04/2023]
Abstract
NAC transcription factors (TFs) are known for their role in development and stress. This article attempts to functionally validate the role of rice SS1/ ONAC025 (LOC_Os11g31330) during seed development. The gene is seed-specific and its promoter directs reporter expression in the developing endosperm and embryo in rice transgenic plants. Furthermore, rice transgenic plants ectopically expressing SS1/ ONAC025 have a plantlet lethal phenotype with hampered vegetative growth, but increased tillers and an altered shoot apical meristem structure. The vegetative cells of these plantlets are filled with distinct starch granules. RNAseq analysis of two independent plantlets reveals the differential expression of reproductive and photosynthetic genes. A comparison with seed development transcriptome indicates differential regulation of many seed-related genes by SS1/ ONAC025. Genes involved in starch biosynthesis, especially amylopectin and those encoding seed storage proteins, and regulating seed size are also differentially expressed. In conjunction, SS1/ ONAC025 shows highest expression in japonica rice. As a TF, SS1/ ONAC025 is a transcriptional repressor localized to endoplasmic reticulum and nucleus. The article shows that SS1/ ONAC025 is a seed-specific gene promoting grain filling in rice, and negatively affecting vegetative growth.
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Affiliation(s)
| | | | - Arunima Mahto
- National Institute of Plant Genome ResearchNew DelhiIndia
| | - Priya Jaiswal
- National Institute of Plant Genome ResearchNew DelhiIndia
| | | | - Pinky Agarwal
- National Institute of Plant Genome ResearchNew DelhiIndia
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163
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Schloss J, Leach M, Brown D, Hannan N, Kendall-Reed P, Steel A. The effects of N-acetyl cysteine on acute viral respiratory infections in humans: A rapid review. Adv Integr Med 2020; 7:232-239. [PMID: 32837898 PMCID: PMC7398034 DOI: 10.1016/j.aimed.2020.07.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Current evidence suggests that N-Acetyl Cysteine (NAC) administration may help improve outcomes in people with acute respiratory distress syndrome and acute lung injury – conditions that closely resemble the signs and symptoms of COVID-19. Few mild and transient adverse events were reported in published randomised-controlled trials, indicating that NAC may be reasonably safe. These findings suggest that NAC may complement the management of COVID-19 infection, particularly when administered intravenously within an intensive care unit (ICU) environment. Verdict Current evidence suggests that N-Acetyl Cysteine (NAC) administration may help improve outcomes in people with acute respiratory distress syndrome (ARDS) and acute lung injury (ALI) – conditions that closely resemble the signs and symptoms of COVID-19. In this rapid review, NAC was predominately administered intravenously to patients with ARDS or ALI, who were at risk of or requiring mechanical ventilation, and were admitted to a hospital intensive care unit. Findings indicated that NAC administration may assist in improving markers of inflammation or oxidation, systemic oxygenation, the need for / duration of ventilation, rate of patient recovery and clinical improvement score. The effects of NAC on patient length of stay, CT/x-ray images, mortality rate and pulmonary complications were inconclusive. Few mild and transient adverse events were noted, indicating that NAC may be safe for use in acute respiratory distress syndrome or acute lung injury. Based on the evidence identified, and the similar symptomatic profiles of ARDS/ALI and COVID-19, the findings suggest that NAC may be used to complement the management of COVID-19 infection within an acute care setting. The safety and efficacy of orally administered NAC for the management of milder forms of COVID-19 infection within the community setting, remains uncertain. The current research evidence suggests NAC warrants further research for acute respiratory viral infections, including COVID-19.
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Affiliation(s)
- Janet Schloss
- Endeavour College of Natural Health, Brisbane,Queensland, Australia
| | - Matthew Leach
- National Centre for Naturopathic Medicine, Southern Cross University, Lismore, New South Wales, Australia
| | - Danielle Brown
- Endeavour College of Natural Health, Brisbane,Queensland, Australia.,Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, New South Wales, Australia
| | - Nicole Hannan
- School of Pharmacy and Pharmacology, Griffith University, Gold Coast, Queensland, Australia
| | | | - Amie Steel
- Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, New South Wales, Australia
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164
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Zong X, Yan Q, Wu F, Ma Q, Zhang J. Genome-Wide Analysis of the Role of NAC Family in Flower Development and Abiotic Stress Responses in Cleistogenes songorica. Genes (Basel) 2020; 11:E927. [PMID: 32806602 DOI: 10.3390/genes11080927] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/08/2020] [Accepted: 08/11/2020] [Indexed: 11/19/2022] Open
Abstract
Plant-specific NAC (NAM, ATAF, CUC) transcription factor (TF) family plays important roles in biological processes such as plant growth and response to stress. Nevertheless, no information is known about NAC TFs in Cleistogenes songorica, a prominent xerophyte desert grass in northwestern China. In this study, 162 NAC genes were found from the Cleistogenes songorica genome, among which 156 C. songoricaNAC (CsNAC) genes (96.3%) were mapped onto 20 chromosomes. The phylogenetic tree constructed by CsNAC and rice NAC TFs can be separated into 14 subfamilies. Syntenic and Ka/Ks analyses showed that CsNACs were primarily expanded by genomewide replication events, and purifying selection was the primary force driving the evolution of CsNAC family genes. The CsNAC gene expression profiles showed that 36 CsNAC genes showed differential expression between cleistogamous (CL) and chasmogamous (CH) flowers. One hundred and two CsNAC genes showed differential expression under heat, cold, drought, salt and ABA treatment. Twenty-three CsNAC genes were commonly differentially expressed both under stress responses and during dimorphic floret development. Gene Ontology (GO) annotation, coexpression network and qRT-PCR tests revealed that these CsNAC genes may simultaneously regulate dimorphic floret development and the response to stress. Our results may help to characterize the NAC transcription factors in C. songorica and provide new insights into the functional research and application of the NAC family in crop improvement, especially in dimorphic floret plants.
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165
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Desoky EAE, Sakr AM, Alhefnawy M, Omran M, Abdalla MMH, Shahin AS, Ali MM. Renal protective effect of N-acetylcysteine with stepwise ramping voltage against extracorporeal shock wave lithotripsy-induced renal injury: a prospective randomized trial. Int Urol Nephrol 2020; 52:2261-2267. [PMID: 32729099 DOI: 10.1007/s11255-020-02580-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 07/20/2020] [Indexed: 11/29/2022]
Abstract
PURPOSE To evaluate the role of combination of N-acetylcysteine with stepwise ramping voltage in renal protection against the ischemic, vascular and oxidative effects of extracorporeal shock wave lithotripsy. PATIENTS AND METHODS A prospective randomized trial on 164 adult patients scheduled for ESWL for single renal stones. Patients with radio-lucent stones, diabetes, hypertension, febrile UTI, and preoperative albuminuria were excluded from the study. Patients were randomized into one of four groups. Group A patients received maximal fixed voltage of ESWL. Group B patients received stepwise ramping voltage of ESWL. Group C patients received fixed maximal voltage with N-acetylcysteine (NAC) 600 mg/bid from 48 h before to 24 h after the procedure. Group D patients received gradual ramping voltage with NAC. Urinary β2-microglobulin, 24 h albumin and N-acetyl-β-D-glucosaminidase/creatinine ratio at 1 day and 5 days post-ESWL and the stone free rate at 2 weeks were measured. RESULTS Group D was the only group that showed no significant difference pre and post ESWL in urinary albumin, β2-microglobulin and N-acetyl-β-D-glucosaminidase/creatinine ratio. Post hoc analysis revealed no significant difference between group B and group C in albumin, β2-microglobulin N-acetyl-β-D-glucosaminidase/creatinine ratio, but both of them had significantly lower levels than group A and significantly higher levels than group D. There was no statistically significant difference between all groups in the stone free rate at 2 weeks. CONCLUSION N-acetylcysteine protects the kidney against ESWL-induced renal injuries especially if combined with stepwise ramping voltage.
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Affiliation(s)
- Esam A E Desoky
- Urology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Ahmed M Sakr
- Urology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Mohamed Alhefnawy
- Urology Department, Faculty of Medicine, Benha University, Benha, Egypt
| | - Mohamed Omran
- Urology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | | | - Ashraf S Shahin
- Urology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Maged M Ali
- Urology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt.
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166
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Aljohani W, Chan BPH, Yaghoobi M. Role of N-Acetylcysteine in the Treatment of Acute No nacetaminophen, Nonalcoholic and Nonviral Hepatitis: A Meta-analysis. J Can Assoc Gastroenterol 2020; 4:125-130. [PMID: 34056530 PMCID: PMC8158650 DOI: 10.1093/jcag/gwaa017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Introduction N-acetylcysteine (NAC) has been extensively investigated for the use in acetaminophen and alcoholic hepatitis and is indicated in acetaminophen overdose. Studies assessing the effect of NAC on other forms of acute hepatitis in adult patients are limited and therefore here we aimed at evaluating the effect of NAC on survival in nonacetaminophen, nonalcoholic and nonviral hepatitis in adults. Methods A comprehensive literature search up to September 2019 was completed for randomized controlled trials (RCTs) comparing NAC to placebo in the management of acute nonacetaminophen, nonalcoholic and nonviral hepatitis. Studies with insufficient data, non-RCT or nonprospective design, paediatric studies and studies with no comparator were excluded. Study selection, quality assessment and data extraction were independently performed by two co-authors. Primary outcome was survival. Secondary outcomes were an increase in infection rate. We used random model Mantel–Haenszel meta-analysis with Cochrane risk of bias to assess the quality of included studies. The recommendation was presented using the GRADE framework. Results Seven out of 42 retrieved studies were included. Study population included patients with post-liver transplant, postsurgical, hypoxia-induced, ischemic and other nonalcoholic hepatitis. There was no difference in overall survival between NAC and placebo (odds ratio [OR] 0.95 [0.55 to 1.62]) in seven studies including 1033 patients. Furthermore, there was no difference in the rate of infection between NAC and placebo (OR 0.87 [0.43 to 1.79]). Random model analysis was used to adjust the effect of statistically significant heterogeneity in both analyses (P = 0.02). Lack of blinding in one study was found as a possible source of heterogeneity. Conclusions NAC does not improve overall survival or the rate of infection in patients with acute nonacetaminophen, nonalcoholic and nonviral hepatitis as compared to placebo and should not be recommended in such setting which may even delay a transplant evaluation (level of evidence: 2a, GRADE of recommendation: B).
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Affiliation(s)
- Waleed Aljohani
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Brian Pak Ho Chan
- Division of Gastroenterology and Department of Health Research Methods, Evidence, and Impact (HEI), McMaster University, Hamilton, Ontario, Canada
| | - Mohammad Yaghoobi
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada.,Division of Gastroenterology and Department of Health Research Methods, Evidence, and Impact (HEI), McMaster University, Hamilton, Ontario, Canada.,Gastrointestinal Health Technology Assessment Group, The Farncombe Family Digestive Health Research Institute, Hamilton, Ontario, Canada
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167
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Nie G, Yang X, Yang Z, Zhong M, Zhu Y, Zhou J, Appiah C, Liao Z, Feng G, Zhang X. Genome-wide investigation of the NAC transcript factor family in perennial ryegrass (Lolium perenne L.) and expression analysis under various abiotic stressor. Genomics 2020; 112:4224-4231. [PMID: 32640275 DOI: 10.1016/j.ygeno.2020.06.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 06/13/2020] [Accepted: 06/22/2020] [Indexed: 12/27/2022]
Abstract
NAC is one of the largest family of plant-specific transcription factors, and it plays important roles in plant development and stress responses. The study identified 72 LpNACs genes from the perennial ryegrass genome database. Gene length, MW and pI of NAC family transcription factors varied, but the gene structure and motifs were relatively conserved in bioinformatics analysis. Phylogenetic analyses of perennial ryegrass, rice and Arabidopsis were performed to study the evolutionary and functional relationships in various species. The expression of LpNAC genes that respond to various abiotic stresses including high salinity, ABA, high temperature, polyethylene glycol (PEG) and heavy metal was comprehensively analyzed. The present study provides a basic understanding of the NAC gene family in perennial ryegrass for further abiotic stress studies and improvements in breeding.
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Affiliation(s)
- Gang Nie
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Xinying Yang
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Zhongfu Yang
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Minyi Zhong
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Yongqun Zhu
- Soil and Fertilizer Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
| | - Jie Zhou
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Charlotte Appiah
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Zongchao Liao
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Guangyan Feng
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Xinquan Zhang
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China.
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168
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Cleare LG, Li KL, Abuzeid WM, Nacharaju P, Friedman JM, Nosanchuk JD. NO Candida auris: Nitric Oxide in Nanotherapeutics to Combat Emerging Fungal Pathogen Candida auris. J Fungi (Basel) 2020; 6:E85. [PMID: 32545506 DOI: 10.3390/jof6020085] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 06/07/2020] [Accepted: 06/10/2020] [Indexed: 12/31/2022] Open
Abstract
Candida auris (C. auris) is an emerging pathogenic fungal species that is especially worrisome due to its high mortality rates and widespread antifungal resistance. Previous studies have demonstrated the efficacy of nitric oxide (NO) nanoparticles on Candida species, and, to our knowledge, this is the first study to investigate the antifungal effects of a NO-generating nanoparticle on C. auris. Six C. auris strains were incubated with a nanoparticle (NAC-SNO-np), which releases N-acetylcysteine S-nitrosothiol (NAC-SNO) and N-acetylcysteine (NAC), and generates NO, through colony forming unit (CFU) assays, and confocal laser scanning microscopy. NAC-SNO-np effectively eradicates planktonic and biofilm C. auris. Across all six strains, 10 mg/mL NAC-SNO-np significantly reduced the number of CFUs (p < 0.05) and demonstrated a >70% decrease in biofilm viability (p < 0.05). NAC-SNO-np effectively eradicates planktonic C. auris and significantly reduces C. auris biofilm formation. Hence, this novel NO-releasing nanoparticle shows promise as a future therapeutic.
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169
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Ju YL, Min Z, Yue XF, Zhang YL, Zhang JX, Zhang ZQ, Fang YL. Overexpression of grapevine Vv NAC08 enhances drought tolerance in transgenic Arabidopsis. Plant Physiol Biochem 2020; 151:214-222. [PMID: 32229406 DOI: 10.1016/j.plaphy.2020.03.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 03/05/2020] [Accepted: 03/20/2020] [Indexed: 06/10/2023]
Abstract
NAC [No apical meristem (NAM), Arabidopsis transcription activation factor (ATAF), Cup-shaped cotyledon (CUC)] transcription factors (TFs) play an important role in plant growth and response to various environmental stress. Drought stress is the primary factor limiting the growth and fruit quality of grapevines worldwide. However, the biological function of the NAC family members in grapevine is not clear. In this study, we reported that VvNAC08, a novel NAC transcription factor gene, was expressed after drought, salicylic acid (SA) and abscisic acid (ABA), jasmonic acid (JA) and melatonin (MT) treatments in grapevine. VvNAC08 was expressed in various tissues. The open reading frame (ORF) of VvNAC08 was 792 bp, encoding 263 amino acids. The VvNAC08 protein could bind to NACRS [CGTA/CACG] in yeast. When subjected to drought and dehydration stress, VvNAC08-overexpression (OE) Arabidopsis had a higher survival rate and a lower water loss rate than wild type (WT) plants. Under drought conditions, transgenic Arabidopsis overexpressing VvNAC08 had a lower malondialdehyde (MDA), H2O2 contents, but a higher peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT) activities as well as more proline content. Moreover, the expressions of marker genes, including ABI5, AREB1, COR15A, COR47, P5CS, RD22, and RD29A, were up-regulated in VvNAC08-overexpression lines when subjected to drought treatments. The results suggest that the transgenic Arabidopsis overexpressing VvNAC08 enhances resistance to drought while up-regulating the expressions of ABA- and stress-related genes.
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Affiliation(s)
- Yan-Lun Ju
- College of Enology, Northwest A & F University, Yangling, Shaanxi, 712100, China.
| | - Zhuo Min
- Department of Brewing Engineering, Moutai University, Renhuai, Guizhou, 564507, China.
| | - Xiao-Feng Yue
- College of Enology, Northwest A & F University, Yangling, Shaanxi, 712100, China.
| | - Yu-Lin Zhang
- College of Enology, Northwest A & F University, Yangling, Shaanxi, 712100, China.
| | - Jun-Xiang Zhang
- Ningxia Grape and Wine Research Institute, Ningxia University, Yinchuan, Ningxia, 750000, China.
| | - Zong-Qin Zhang
- College of Enology, Northwest A & F University, Yangling, Shaanxi, 712100, China; Heyang Viti-viniculture Station, Northwest A&F University, Yangling, Shaanxi, 712100, China.
| | - Yu-Lin Fang
- College of Enology, Northwest A & F University, Yangling, Shaanxi, 712100, China; Shaanxi Engineering Research Center for Viti-Viniculture, Yangling, Shaanxi, 712100, China.
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170
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Cui Y, Liu L, Xiao Y, Li X, Zhang J, Xie X, Tian J, Sen CK, He X, Hao H, Liu Z. N-acetylcysteine differentially regulates the populations of bone marrow and circulating endothelial progenitor cells in mice with limb ischemia. Eur J Pharmacol 2020; 881:173233. [PMID: 32492379 DOI: 10.1016/j.ejphar.2020.173233] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 05/21/2020] [Accepted: 05/29/2020] [Indexed: 12/20/2022]
Abstract
Endothelial progenitor cells (EPCs) are important to tissue repair and regeneration especially after ischemic injury, and very heterogeneous in phenotypes and biological features. Reactive oxygen species are involved in regulating EPC number and function. N-acetylcysteine (NAC) inhibits ischemia-induced reactive oxygen species formation and promotes ischemic limb recovery. This study was to evaluate the effect of NAC on EPC subpopulations in bone marrow (BM) and blood in mice with limb ischemia. Limb ischemia was induced by femoral artery ligation in male C57BL/6 mice with or without NAC treatment. EPC subpopulations, intracellular reactive oxygen species production, cell proliferation and apoptosis in BM and blood cells were analyzed at baseline, day 3 (acute ischemia) and 21 (chronic) after ligation. c-Kit+/CD31+, Sca-1+/Flk-1+, CD34+/CD133+, and CD34+/Flk-1+ were used to define EPC subpopulations. Limb blood flow, function, muscle structure, and capillary density were evaluated with laser Doppler perfusion imaging, treadmill test, and immunohistochemistry, respectively, at day 3, 7, 14 and 21 post ischemia. Reactive oxygen species production in circulating and BM mononuclear cells and EPCs populations were significantly increased in BM and blood in mice with acute and chronic ischemia. NAC treatment effectively blocked ischemia-induced reactive oxygen species production in circulating and BM mononuclear cells, and selectively increased EPC population in circulation, not BM, with preserved proliferation in mice with chronic ischemia, and enhanced limb blood flow and function recovery, while preventing acute ischemia-induced increase in BM and circulating EPCs. These data demonstrated that NAC selectively enhanced circulating EPC population in mice with chronic limb ischemia.
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171
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Alıcı H. Structural analyses and force fields comparison for NACore (68-78) and SubNACore (69-77) fibril segments of Parkinson's disease. J Mol Model 2020; 26:132. [PMID: 32394304 DOI: 10.1007/s00894-020-04379-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 04/07/2020] [Indexed: 10/24/2022]
Abstract
The α-synuclein fibrils are a pathological hallmark of Parkinson's disease (PD) and are abundant in the brains of PD patients. These amyloid fibrils can aggregate into distinct polymorphism under different physical conditions. Therefore, these different fibril polymorph formations should be considered in drug design studies targeting amyloid fibrils. Recently, the atomic structures of two small fibril segments of α-synuclein, named NACore (68-78) and SubNACore (69-77), have been crystallized. These segments are critical for cytotoxicity and fibril formation. Therefore, elucidation of interface interactions between pair sheets of the NACore and SubNACore is significant for the clarification of the mechanism of fibril formation in PD. In this context, molecular dynamics (MD) simulation technique is a convenient tool to investigate interface interactions of these segments at the atomic level. However, the accuracy of these simulations depends on the utilized force fields. Therefore, we have tested the dependence of interface interactions and stabilities of these small amyloid fibrils on various force fields. From the results of triple long (100 ns) MD simulations, we inferred for the stability investigations of the NACore and SubNACore that CHARMM27 and GROMOS53A6 are the most convenient force fields whereas AMBER99SB-ILDN is the most unfavorable one. Consequently, it is expected that our findings will guide the selection of the appropriate force field for simulations between these segments and possible inhibitors of this disease.
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Wu W, Wang MM, Gong H, Liu XF, Guo DL, Sun NJ, Huang JW, Zhu QG, Chen KS, Yin XR. High CO2/hypoxia-induced softening of persimmon fruit is modulated by DkERF8/16 and Dk NAC9 complexes. J Exp Bot 2020; 71:2690-2700. [PMID: 31926021 PMCID: PMC7210769 DOI: 10.1093/jxb/eraa009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 01/09/2020] [Indexed: 05/24/2023]
Abstract
Most persimmon (Diospyros kaki) cultivars are astringent and require post-harvest deastringency treatments such as 95% CO2 (high-CO2 treatment) to make them acceptable to consumers. High-CO2 treatment can, however, also induce excessive softening, which can be reduced by adding 1-methylcyclopropene (1-MCP). Previous studies have shown that genes encoding the ETHYLENE RESPONSE FACTORS (ERFs) DkERF8/16/19 can trans-activate xyloglucan endotransglycosylase/hydrolase (DkXTH9), which encodes the cell wall-degrading enzyme associated with persimmon fruit softening. In this study, RNA-seq data between three treatments were compared, namely high-CO2, high-CO2+1-MCP, and controls. A total of 227 differentially expressed genes, including 17 transcription factors, were predicted to be related to persimmon post-deastringency softening. Dual-luciferase assays indicated that DkNAC9 activated the DkEGase1 promoter 2.64-fold. Synergistic effects on transcription of DkEGase1 that involved DkNAC9 and the previously reported DkERF8/16 were identified. Electrophoretic mobility shift assay indicated that DkNAC9 could physically bind to the DkEGase1 promoter. Bimolecular fluorescence complementation and firefly luciferase complementation imaging assays indicated protein-protein interactions between DkNAC9 and DkERF8/16. Based on these findings, we conclude that DkNAC9 is a direct transcriptional activator of DkEGase1 that can co-operate with DkERF8/16 to enhance fruit post-deastringency softening.
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Affiliation(s)
- Wei Wu
- Department of Horticulture, Zhejiang University, Hangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Hangzhou, Zhejiang, China
| | - Miao-miao Wang
- College of Horticulture, Henan Agricultural University, Henan, China
| | - Hui Gong
- Department of Horticulture, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xiao-fen Liu
- Department of Horticulture, Zhejiang University, Hangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Hangzhou, Zhejiang, China
| | - Da-long Guo
- College of Forestry, Henan University of Science and Technology, Luoyang, Henan, China
| | - Ning-jing Sun
- College of Resources and Environment Sciences, Baoshan University, Baoshan, Yunnan, China
| | - Jing-wen Huang
- Department of Horticulture, Zhejiang University, Hangzhou, Zhejiang, China
| | - Qing-gang Zhu
- Department of Horticulture, Zhejiang University, Hangzhou, Zhejiang, China
| | - Kun-song Chen
- Department of Horticulture, Zhejiang University, Hangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Hangzhou, Zhejiang, China
| | - Xue-ren Yin
- Department of Horticulture, Zhejiang University, Hangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Integrative Biology of Horticultural Plants, Hangzhou, Zhejiang, China
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173
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Park H, Kim JE. Deletion of P2X7 Receptor Decreases Basal Glutathione Level by Changing Glutamate-Glutamine Cycle and Neutral Amino Acid Transporters. Cells 2020; 9:E995. [PMID: 32316268 DOI: 10.3390/cells9040995] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 04/07/2020] [Accepted: 04/14/2020] [Indexed: 12/24/2022] Open
Abstract
Glutathione (GSH) is an endogenous tripeptide antioxidant that consists of glutamate-cysteine-glycine. GSH content is limited by the availability of glutamate and cysteine. Furthermore, glutamine is involved in the regulation of GSH synthesis via the glutamate–glutamine cycle. P2X7 receptor (P2X7R) is one of the cation-permeable ATP ligand-gated ion channels, which is involved in neuronal excitability, neuroinflammation and astroglial functions. In addition, P2X7R activation decreases glutamate uptake and glutamine synthase (GS) expression/activity. In the present study, we found that P2X7R deletion decreased the basal GSH level without altering GSH synthetic enzyme expressions in the mouse hippocampus. P2X7R deletion also increased expressions of GS and ASCT2 (a glutamine:cysteine exchanger), but diminished the efficacy of N-acetylcysteine (NAC, a GSH precursor) in the GSH level. SIN-1 (500 μM, a generator nitric oxide, superoxide and peroxynitrite), which facilitates the cystine–cysteine shuttle mediated by xCT (a glutamate/cystein:cystine/NAC antiporter), did not affect basal GSH concentration in WT and P2X7R knockout (KO) mice. However, SIN-1 effectively reduced the efficacy of NAC in GSH synthesis in WT mice, but not in P2X7R KO mice. Therefore, our findings indicate that P2X7R may be involved in the maintenance of basal GSH levels by regulating the glutamate–glutamine cycle and neutral amino acid transports under physiological conditions, which may be the defense mechanism against oxidative stress during P2X7R activation.
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174
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Georgiou-Siafis SK, Samiotaki MK, Demopoulos VJ, Panayotou G, Tsiftsoglou AS. Formation of novel N-acetylcysteine-hemin adducts abrogates hemin-induced cytotoxicity and suppresses the NRF2-driven stress response in human pro-erythroid K562 cells. Eur J Pharmacol 2020; 880:173077. [PMID: 32222495 DOI: 10.1016/j.ejphar.2020.173077] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 03/17/2020] [Accepted: 03/19/2020] [Indexed: 01/28/2023]
Abstract
Heme (iron protoporphyrin IX), as the prosthetic group in hemoproteins, regulates vital cellular functions in human tissues. However, free heme released during hemolysis events promotes severe complications to millions of people worldwide. Over the years, thiols like glutathione (GSH) were known to antagonize heme toxicity. In this study, we have uncovered the underlying molecular mechanism by which N-acetylcysteine (NAC), a well-known thiol prevents hemin-induced cytotoxicity (HIC). Hemin-responsive human pro-erythroid K562 cells were employed to assess hemin intracellular accumulation and cytotoxicity at concentrations ≥50 μΜ, in cultures exposed only to hemin and/or both hemin and NAC. NAC inhibited the intracellular accumulation of hemin and prevented hemin-induced cell growth inhibition, cell death, oxidative stress, and accumulation of ubiquitinated proteins. Meanwhile, the activation of the NF-E2-related factor-2 (NRF2)-driven stress gene activation, a key element involved in HIC, was suppressed by NAC. A refined mechanism of the chemical reaction between NAC and hemin leading to adduct formation via a nucleophilic attack on hemin was uncovered for the first time by tandem mass spectrometry analysis (LC-MS/MS). Such thiol-hemin adducts acted as intermediates to mitigate HIC and to suppress hemin-induced NRF2-driven gene activation. Our findings support the concept that NAC-hemin adduct formation is the major novel molecular mechanism rather than the reactive oxygen species-scavenging capacity of thiols to protect cells from HIC. Our results imply that thiols and their derivatives can be of potential therapeutic value in hemolytic disorders.
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Affiliation(s)
- Sofia K Georgiou-Siafis
- Laboratory of Pharmacology Department of Pharmaceutical Sciences, School of Health Sciences, Aristotle University of Thessaloniki (A.U.Th), Thessaloniki, 54124, Greece
| | | | - Vassilis J Demopoulos
- Laboratory of Pharmaceutical Chemistry, Department of Pharmaceutical Sciences, School of Health Sciences, Aristotle University of Thessaloniki (A.U.Th), Thessaloniki, 54124, Greece
| | | | - Asterios S Tsiftsoglou
- Laboratory of Pharmacology Department of Pharmaceutical Sciences, School of Health Sciences, Aristotle University of Thessaloniki (A.U.Th), Thessaloniki, 54124, Greece.
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175
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Hao JN, Wang YH, Duan AQ, Liu JX, Feng K, Xiong AS. NAC Family Transcription Factors in Carrot: Genomic and Transcriptomic Analysis and Responses to Abiotic Stresses. DNA Cell Biol 2020; 39:816-827. [PMID: 32175765 DOI: 10.1089/dna.2019.5208] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Carrot is an annual or biennial herbaceous plant of the Apiaceae family. Carrot is an important vegetable, and its fresh taproot, which contains rich nutrients, is the main edible part. In the life cycle of carrot, NAC family transcription factors (TFs) are involved in almost all physiological processes. The function of NAC TFs in carrot remains unclear. In this study, 73 NAC family TF members in carrot were identified and characterized using transcriptome and genome databases. These members were divided into 14 subfamilies. Multiple sequence alignment was performed, and the conserved domains, common motifs, phylogenetic tree, and interaction network of DcNAC proteins were predicted and analyzed. Results showed that the same group of NAC proteins of carrot had high similarity. Eight DcNAC genes were selected to detect their expression profiles under abiotic stress treatments. The expression levels of the selected DcNAC genes significantly increased under treatments with low temperature, high temperature, drought, and salt stress. Results provide potentially useful information for further analysis of the roles of DcNAC transcription factors in carrot.
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Affiliation(s)
- Jian-Nan Hao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, China.,Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - Ya-Hui Wang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, China.,Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - Ao-Qi Duan
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, China.,Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - Jie-Xia Liu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, China.,Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - Kai Feng
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, China.,Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - Ai-Sheng Xiong
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, China.,Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing, China
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176
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Wu YY, Liu XF, Fu BL, Zhang QY, Tong Y, Wang J, Wang WQ, Grierson D, Yin XR. Methyl Jasmonate Enhances Ethylene Synthesis in Kiwifruit by Inducing NAC Genes That Activate ACS1. J Agric Food Chem 2020; 68:3267-3276. [PMID: 32101430 DOI: 10.1021/acs.jafc.9b07379] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cross-talk between various hormones is important in regulating many aspects of plant growth, development, and senescence, including fruit ripening. Here, exogenous ethylene (ETH, 100 μL/L, 12 h) rapidly accelerated 'Hayward' kiwifruit (Actinidia deliciosa) softening and ethylene production and was enhanced by supplementing with continuous treatment with methyl jasmonate (MeJA, 100 μM/L, 12 h) (ETH+MeJA). ETH+MeJA enhanced ACC synthase (ACS) activities and 1-aminocyclopropane-1-carboxylic acid (ACC) accumulation but not ACC oxidase (ACO) activity. Increased transcripts of ACS genes AdACS1 and AdACS2, ACS activity, and ethylene production were positively correlated. The abundance of AdACS1 was about 6-fold higher than AdACS2. RNA-seq identified 6 transcription factors among the 87 differentially expressed unigenes induced by ETH+MeJA. Dual-luciferase and electrophoretic mobility shift assays (EMSA) indicated that AdNAC2/3 physically interacted with and trans-activated the AdACS1 promoter 2.2- and 3.5-fold, respectively. Collectively, our results indicate that MeJA accelerates ethylene production in kiwifruit induced by exogenous ethylene, via a preferential activation of AdACS1 and AdACS2.
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Affiliation(s)
- Ying-Ying Wu
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
| | - Xiao-Fen Liu
- National Engineering Laboratory of Cold Chain Logistics Technology and Facility for Horticultural Produce, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
| | - Bei-Ling Fu
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
| | - Qiu-Yun Zhang
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
| | - Yang Tong
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
| | - Jian Wang
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
| | - Wen-Qiu Wang
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
| | - Donald Grierson
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
- Plant & Crop Sciences Division, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, U.K
| | - Xue-Ren Yin
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
- National Engineering Laboratory of Cold Chain Logistics Technology and Facility for Horticultural Produce, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
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177
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An X, Chen J, Jin G. Transcriptome profiling of kenaf ( Hibiscus cannabinus L.) under plumbic stress conditions implies the involvement of NAC transcription factors regulating reactive oxygen species-dependent programmed cell death. PeerJ 2020; 8:e8733. [PMID: 32195056 PMCID: PMC7069409 DOI: 10.7717/peerj.8733] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 02/11/2020] [Indexed: 12/23/2022] Open
Abstract
Heavy metal contamination of soils has become a serious global issue, and bioremediation has been proposed as a potential solution. Kenaf (Hibiscus cannabinus L.) is a fast growing, non-woody multipurpose annual plant that is suitable for removing excess heavy metals from soils. However, there has been relatively little research on the kenaf molecular mechanisms induced in response to an exposure to heavy metal stress. Thus, whole kenaf seedlings grown under control (normal) and stress (plumbic treatment) conditions were sampled for transcriptome sequencing. Unigenes generated through the de novo assembly of clean reads were functionally annotated based on seven databases. Transcription factor (TF)-coding genes were predicted and the physiological traits of the seedlings were analyzed. A total of 44.57 Gb high-quality sequencing data were obtained, which were assembled into 136,854 unigenes. These unigenes included 1,697 that were regarded as differentially expressed genes (DEGs). A GO enrichment analysis of the DEGs indicated that many of them are related to catalytic activities. Moreover, the DEGs appeared to suggest that numerous KEGG pathways are suppressed (e.g., the photosynthesis-involving pathways) or enhanced (like the flavonoid metabolism pathways) in response to Pb stress. Of the 2,066 predicted TF-coding genes, only 55 were differentially expressed between the control and stressed samples. Further analyses suggested that the plumbic stress treatment induced reactive oxygen species-dependent programmed cell death in the kenaf plants via a process that may be regulated by the differentially expressed NAC TF genes.
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Affiliation(s)
- Xia An
- Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Jie Chen
- Huazhong Agricultural University, Wuhan, China
| | - Guanrong Jin
- Zhejiang Academy of Agricultural Sciences, Hangzhou, China
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178
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Zhang A, Zhang Q, Li J, Gong H, Fan X, Yang Y, Liu X, Yin X. Transcriptome co-expression network analysis identifies key genes and regulators of ripening kiwifruit ester biosynthesis. BMC Plant Biol 2020; 20:103. [PMID: 32138665 PMCID: PMC7059668 DOI: 10.1186/s12870-020-2314-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 02/27/2020] [Indexed: 05/02/2023]
Abstract
BACKGROUND Aroma is an important organoleptic quality for fruit and has a large influence on consumer preference. Kiwifruit esters undergo rapid and substantial changes contributing to the flavor during fruit ripening. Part of enzymes and their coding genes have been indicated potential candidates for flavor-related esters synthesis. However, there still exist obvious gaps in the biosynthetic pathways of esters and the mechanisms regulating ester biosynthesis in kiwifruit remain unknown. RESULTS Using gas chromatography-mass spectrometry (GC-MS), volatile compounds of kiwifruit were quantified in response to ethylene (ETH, 100 μl/l, 24 h, 20 °C) and 1-methylcyclopropene (1-MCP, 1 μl/l, 24 h, 20 °C). The results indicated that esters showed the most substantial changes enhanced by ethylene and were inhibited by 1-MCP. Correlations between RNA-seq results and concentrations of esters, constructed using Weighted Gene Co-Expression Network Analysis (WGCNA) indicated that three structural genes (fatty acid desaturase, AdFAD1; aldehyde dehydrogenase, AdALDH2; alcohol acyltransferase, AdAT17) had similar expression patterns that paralled the changes in total ester content, and AdFAD1 transcripts exhibited the highest correlation. In order to search for potential regulators for ester biosynthesis, 14 previously reported ethylene-responsive transcription factors (TFs) were included in the correlation analysis with esters and their biosynthetic genes. Using dual-luciferase assay, the in vivo regulatory activities of TFs on ester biosynthetic gene promoters were investigated and the results indicated that AdNAC5 and AdDof4 (DNA binding with one finger) trans-activated and trans-suppressed the AdFAD1 promoter. CONCLUSIONS The present study advanced the molecular basis of ripening-related ester biosynthesis in kiwifruit by identifying three biosynthetic related genes AdFAD1, AdALDH2 and AdAT17 by transcriptome analysis, and highlighted the function of two TFs by transactivation studies.
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Affiliation(s)
- Aidi Zhang
- School of Food Engineering, Ludong University, Yantai, Shandong 264025 People’s Republic of China
- BioNanotechnology Institute, Ludong University, Yantai, Shandong 264025 People’s Republic of China
| | - Qiuyun Zhang
- College of Agriculture & Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058 People’s Republic of China
| | - Jianzhao Li
- School of Agriculture, Ludong University, Yantai, Shandong 264025 People’s Republic of China
| | - Hansheng Gong
- School of Food Engineering, Ludong University, Yantai, Shandong 264025 People’s Republic of China
- BioNanotechnology Institute, Ludong University, Yantai, Shandong 264025 People’s Republic of China
| | - Xinguang Fan
- School of Food Engineering, Ludong University, Yantai, Shandong 264025 People’s Republic of China
| | - Yanqing Yang
- School of Food Engineering, Ludong University, Yantai, Shandong 264025 People’s Republic of China
| | - Xiaofen Liu
- College of Agriculture & Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058 People’s Republic of China
| | - Xueren Yin
- College of Agriculture & Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou, 310058 People’s Republic of China
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179
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Hennet L, Berger A, Trabanco N, Ricciuti E, Dufayard JF, Bocs S, Bastianelli D, Bonnal L, Roques S, Rossini L, Luquet D, Terrier N, Pot D. Transcriptional Regulation of Sorghum Stem Composition: Key Players Identified Through Co-expression Gene Network and Comparative Genomics Analyses. Front Plant Sci 2020; 11:224. [PMID: 32194601 PMCID: PMC7064007 DOI: 10.3389/fpls.2020.00224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 02/12/2020] [Indexed: 06/10/2023]
Abstract
Most sorghum biomass accumulates in stem secondary cell walls (SCW). As sorghum stems are used as raw materials for various purposes such as feed, energy and fiber reinforced polymers, identifying the genes responsible for SCW establishment is highly important. Taking advantage of studies performed in model species, most of the structural genes contributing at the molecular level to the SCW biosynthesis in sorghum have been proposed while their regulatory factors have mostly not been determined. Validation of the role of several MYB and NAC transcription factors in SCW regulation in Arabidopsis and a few other species has been provided. In this study, we contributed to the recent efforts made in grasses to uncover the mechanisms underlying SCW establishment. We reported updated phylogenies of NAC and MYB in 9 different species and exploited findings from other species to highlight candidate regulators of SCW in sorghum. We acquired expression data during sorghum internode development and used co-expression analyses to determine groups of co-expressed genes that are likely to be involved in SCW establishment. We were able to identify two groups of co-expressed genes presenting multiple evidences of involvement in SCW building. Gene enrichment analysis of MYB and NAC genes provided evidence that while NAC SECONDARY WALL THICKENING PROMOTING FACTOR NST genes and SECONDARY WALL-ASSOCIATED NAC DOMAIN PROTEIN gene functions appear to be conserved in sorghum, NAC master regulators of SCW in sorghum may not be as tissue compartmentalized as in Arabidopsis. We showed that for every homolog of the key SCW MYB in Arabidopsis, a similar role is expected for sorghum. In addition, we unveiled sorghum MYB and NAC that have not been identified to date as being involved in cell wall regulation. Although specific validation of the MYB and NAC genes uncovered in this study is needed, we provide a network of sorghum genes involved in SCW both at the structural and regulatory levels.
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Affiliation(s)
- Lauriane Hennet
- CIRAD, UMR AGAP, Montpellier, France
- CIRAD, INRA, Montpellier SupAgro, University of Montpellier, Montpellier, France
| | - Angélique Berger
- CIRAD, UMR AGAP, Montpellier, France
- CIRAD, INRA, Montpellier SupAgro, University of Montpellier, Montpellier, France
| | - Noemi Trabanco
- Parco Tecnologico Padano, Lodi, Italy
- Centro de Biotecnología y Genómica de Plantas, UPM-INIA, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Madrid, Spain
| | - Emeline Ricciuti
- CIRAD, UMR AGAP, Montpellier, France
- CIRAD, INRA, Montpellier SupAgro, University of Montpellier, Montpellier, France
| | - Jean-François Dufayard
- CIRAD, UMR AGAP, Montpellier, France
- CIRAD, INRA, Montpellier SupAgro, University of Montpellier, Montpellier, France
| | - Stéphanie Bocs
- CIRAD, UMR AGAP, Montpellier, France
- CIRAD, INRA, Montpellier SupAgro, University of Montpellier, Montpellier, France
| | - Denis Bastianelli
- CIRAD, INRA, Montpellier SupAgro, University of Montpellier, Montpellier, France
- CIRAD, UMR SELMET, Montpellier, France
| | - Laurent Bonnal
- CIRAD, INRA, Montpellier SupAgro, University of Montpellier, Montpellier, France
- CIRAD, UMR SELMET, Montpellier, France
| | - Sandrine Roques
- CIRAD, UMR AGAP, Montpellier, France
- CIRAD, INRA, Montpellier SupAgro, University of Montpellier, Montpellier, France
| | - Laura Rossini
- Parco Tecnologico Padano, Lodi, Italy
- Department of Agricultural and Environmental Sciences - Production, Landscape, Agroenergy, Università degli Studi di Milano, Milan, Italy
| | - Delphine Luquet
- CIRAD, UMR AGAP, Montpellier, France
- CIRAD, INRA, Montpellier SupAgro, University of Montpellier, Montpellier, France
| | - Nancy Terrier
- AGAP, CIRAD, INRAE, Montpellier SupAgro, University of Montpellier, Montpellier, France
| | - David Pot
- CIRAD, UMR AGAP, Montpellier, France
- CIRAD, INRA, Montpellier SupAgro, University of Montpellier, Montpellier, France
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180
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Wang TT, Yang Y, Wei W, Lin CT, Ma LY. Identification and expression analyses of the NAC transcription factor family in Spartina alterniflora. Yi Chuan 2020; 42:194-211. [PMID: 32102776 DOI: 10.16288/j.yczz.19-250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
As a coastal halophyte, Spartina alterniflora has high salt tolerance. However, the mechanism at the molecular level has not been widely studied due to the absence of a reference genome. The proteins of NAC families are plant-specific transcription factors that regulate the growth, development and stress response in plants. To identify the NAC family and explore the relationship between NAC proteins and the growth, development and stress response of Spatina alterniflora, full-length transcriptome data of Spartina alterniflora by the third generation sequencing technology was used as reference sequences in this study to blast with the NAC protein sequences from Oryza sativa, Arabidopsis thaliana and Zea mays. Finally, 62 SaNAC proteins were found in Spartina alterniflora by deep analysis on conserved domains. Then we analyzed sequence alignment, evolution, motif prediction, homology comparison, subcellular localization, tissue and abiotic stress-induced gene differential expression profile on the NAC family members in Spartina alterniflora. As a result, all SaNAC proteins were found containing a conserved NAM domain and having certain evolutionary similarity with rice; two family proteins, SaNAC9 and SaNAC49, were expressed in the nucleus; moreover, SaNAC genes were identified to have distinct expressional profiles in different tissues and stress response of Spartina alterniflora. These results indicated the SaNAC transcription factor family not only had conserved functional domains but also played important role in the regulation of growth, development and abiotic stress response.
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Affiliation(s)
- Tao-Tao Wang
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Yong Yang
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Wei Wei
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Chen-Tao Lin
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Liu-Yin Ma
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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Akimoto M, Yamamoto Y, Watanabe S, Yamaga H, Yoshida K, Wakabayashi K, Tahara Y, Horie N, Fujimoto K, Kusakari K, Kamiya K, Kojima K, Kawakami T, Kojima H, Ono A, Kasahara T, Fujita M. Oxidation of a cysteine-derived nucleophilic reagent by dimethyl sulfoxide in the amino acid derivative reactivity assay. J Appl Toxicol 2020; 40:843-854. [PMID: 32052484 DOI: 10.1002/jat.3948] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 12/22/2019] [Accepted: 12/27/2019] [Indexed: 01/08/2023]
Abstract
The amino acid derivative reactivity assay (ADRA), which is an in chemico alternative to the use of animals in testing for skin sensitization potential, offers significant advantages over the direct peptide reactivity assay (DPRA) in that it utilizes nucleophilic reagents that are sensitive enough to be used with test chemical solutions prepared to concentrations of 1 mm, which is one-hundredth that of DPRA. ADRA testing of hydrophobic or other poorly soluble compounds requires that they be dissolved in a solvent consisting of dimethyl sulfoxide (DMSO) and acetonitrile. DMSO is known to promote dimerization by oxidizing thiols, which then form disulfide bonds. We investigated the extent to which DMSO oxidizes the cysteine-derived nucleophilic reagents used in both DPRA and ADRA and found that oxidation of both N-(2-(1-naphthyl)acetyl)-l-cysteine (NAC) and cysteine peptide increases as the concentration of DMSO increases, thereby lowering the concentration of the nucleophilic reagent. We also found that use of a solvent consisting of 5% DMSO in acetonitrile consistently lowered NAC concentrations by about 0.4 μm relative to the use of solvents containing no DMSO. We also tested nine sensitizers and four nonsensitizers having different sensitization potencies to compare NAC depletion with and without 5% DMSO and found that reactivity was about the same with either solvent. Based on the above, we conclude that the use of a solvent containing 5% DMSO has no effect on the accuracy of ADRA test results. We plan to review and propose revisions to OECD Test Guideline 442C based on the above investigation.
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Affiliation(s)
- Miyuki Akimoto
- Fujifilm Corporation, Safety Evaluation Center, Kanagawa, Japan
| | - Yusuke Yamamoto
- Fujifilm Corporation, Safety Evaluation Center, Kanagawa, Japan
| | - Shinichi Watanabe
- Lion Corporation, Safety Science Research Laboratory, Kanagawa, Japan
| | - Hiroaki Yamaga
- Lion Corporation, Safety Science Research Laboratory, Kanagawa, Japan
| | - Kousuke Yoshida
- Lion Corporation, Safety Science Research Laboratory, Kanagawa, Japan
| | | | - Yu Tahara
- Mitsui Chemicals, Inc. Chemical Safety Department, Chiba, Japan
| | - Nobuyuki Horie
- Sumitomo Chemical Co. Ltd. Environmental Health Science Laboratory, Osaka, Japan
| | - Keiichi Fujimoto
- Sumitomo Chemical Co. Ltd. Environmental Health Science Laboratory, Osaka, Japan
| | - Kei Kusakari
- Nissan Chemical Corporation, Biological Research Laboratories, Saitama, Japan
| | - Kohei Kamiya
- Nissan Chemical Corporation, Biological Research Laboratories, Saitama, Japan
| | - Kohichi Kojima
- Food and Drug Safety Center, Hatano Research Institute, Kanagawa, Japan
| | - Tsuyoshi Kawakami
- Division of Environmental Chemistry, National Institute of Health Sciences, Kanagawa, Japan
| | - Hajime Kojima
- Biological Safety Research Center, Division of Risk Assessment, National Institute of Health Sciences, Kanagawa, Japan
| | | | | | - Masaharu Fujita
- Fujifilm Corporation, Safety Evaluation Center, Kanagawa, Japan
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182
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Maiwall R, Kumar A, Bhadoria AS, Jindal A, Kumar G, Bhardwaj A, Maras JS, Sharma MK, Sharma BC, Sarin SK. Utility of N-acetylcysteine in ischemic hepatitis in cirrhotics with acute variceal bleed: a randomized controlled trial. Hepatol Int 2020; 14:577-586. [PMID: 32048131 DOI: 10.1007/s12072-020-10013-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 01/10/2020] [Indexed: 01/22/2023]
Abstract
BACKGROUND AND AIMS Ischemic hepatitis (IH) following acute variceal bleed (AVB) carries an ominous prognosis. N-Acetylcysteine (NAC), a potent anti-oxidant, may prevent IH by improving tissue oxygen delivery and improving hepatic hypoxia. METHODS Consecutive cirrhotics with AVB were prospectively randomized to receive either standard of care (SOC) plus NAC intravenously for 72 h(at 150 mg/kg/h for 1 h followed by 12.5 mg/kg/h for 4 h, followed by 6.25 mg/kg for 67 h) (Group A, n = 107) or SOC alone (Group B, n = 107). RESULTS Baseline characteristics were comparable. IH developed more frequently in Gr.B 25(23%) than A-15(14%); p = 0.08). Incidence of IH increased with severity of liver disease. Binary logistic regression analysis showed reduced incidence of IH in Gr.A than B [odds ratio (OR) 0.33, 0.11-0.93] patients after controlling for other significant factors. The incidence of acute kidney injury (AKI) was also reduced in Gr.A [OR 0.34, 0.15-0.75]. Development of IH was significantly associated with increased deaths due to liver failure at 6 weeks [subdistribution hazard ratio (SHR) 21.6, 7.4-62.8]. On multivariate competing risk analysis, significantly lower deaths due to liver failure (SHR 0.33, 0.11-0.97) were noted in Gr.A than B. CONCLUSIONS One in five patients with acute variceal bleed develops ischemic hepatitis which is associated with worse outcomes. NAC therapy averts deaths due to liver failure by preventing IH and reduces AKI and is, therefore, recommended for cirrhotics with acute variceal bleed. TRIAL REGISTRATION Clinicaltrials.gov no: NCT02015403.
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Affiliation(s)
- Rakhi Maiwall
- Department of Hepatology, Institute of Liver and Biliary Sciences, D-1, VasantKunj, New Delhi, 110070, India
| | - Awinash Kumar
- Department of Hepatology, Institute of Liver and Biliary Sciences, D-1, VasantKunj, New Delhi, 110070, India
| | - Ajeet Singh Bhadoria
- Department of Clinical Research, Institute of Liver and Biliary Sciences, New Delhi, India
| | - Ankur Jindal
- Department of Hepatology, Institute of Liver and Biliary Sciences, D-1, VasantKunj, New Delhi, 110070, India
| | - Guresh Kumar
- Department of Research, Institute of Liver and Biliary Sciences, New Delhi, India
| | - Ankit Bhardwaj
- Department of Clinical Research, Institute of Liver and Biliary Sciences, New Delhi, India
| | - Jaswinder Singh Maras
- Department of Molecular and Cellular Medicine, Institute of Liver and Biliary Sciences, New Delhi, India
| | - Manoj Kumar Sharma
- Department of Hepatology, Institute of Liver and Biliary Sciences, D-1, VasantKunj, New Delhi, 110070, India
| | - Barjesh Chandra Sharma
- Department of Hepatology, Institute of Liver and Biliary Sciences, D-1, VasantKunj, New Delhi, 110070, India
| | - Shiv Kumar Sarin
- Department of Hepatology, Institute of Liver and Biliary Sciences, D-1, VasantKunj, New Delhi, 110070, India.
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183
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Zalewska A, Szarmach I, Żendzian-Piotrowska M, Maciejczyk M. The Effect of N-Acetylcysteine on Respiratory Enzymes, ADP/ATP Ratio, Glutathione Metabolism, and Nitrosative Stress in the Salivary Gland Mitochondria of Insulin Resistant Rats. Nutrients 2020; 12:nu12020458. [PMID: 32059375 PMCID: PMC7071150 DOI: 10.3390/nu12020458] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/08/2020] [Accepted: 02/10/2020] [Indexed: 12/18/2022] Open
Abstract
This is the first study to assess the effect of N-acetylcysteine (NAC) on the mitochondrial respiratory system, as well as free radical production, glutathione metabolism, nitrosative stress, and apoptosis in the salivary gland mitochondria of rats with high-fat diet (HFD)-induced insulin resistance (IR). The study was conducted on male Wistar rats divided into four groups of 10 animals each: C (control, rats fed a standard diet containing 10.3% fat), C + NAC (rats fed a standard diet, receiving NAC intragastrically), HFD (rats fed a high-fat diet containing 59.8% fat), and HFD + NAC (rats fed HFD diet, receiving NAC intragastrically). We confirmed that 8 weeks of HFD induces systemic IR as well as disturbances in mitochondrial complexes of the parotid and submandibular glands of rats. NAC supplementation leads to a significant increase in the activity of complex I, II + III and cytochrome c oxidase (COX), and also reduces the ADP/ATP ratio compared to HFD rats. Furthermore, NAC reduces the hydrogen peroxide production/activity of pro-oxidant enzymes, increases the pool of mitochondrial glutathione, and prevents cytokine formation, apoptosis, and nitrosative damage to the mitochondria in both aforementioned salivary glands of HFD rats. To sum up, NAC supplementation enhances energy metabolism in the salivary glands of IR rats, and prevents inflammation, apoptosis, and nitrosative stress.
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Affiliation(s)
- Anna Zalewska
- Experimental Dentistry Laboratory, Medical University, 15-222 Bialystok, Poland
- Correspondence: (A.Z.); (M.M.)
| | - Izabela Szarmach
- Department of Orthodontics, Medical University, 15-222 Bialystok, Poland;
| | | | - Mateusz Maciejczyk
- Department of Hygiene, Epidemiology and Ergonomics, Medical University, 15-222 Bialystok, Poland;
- Correspondence: (A.Z.); (M.M.)
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184
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Wen CH, Hong SF, Hu SF, Lin SS, Chu FH. Lfo-miR164b and Lf NAC1 as autumn leaf senescence regulators in Formosan sweet gum (Liquidambar formosana Hance). Plant Sci 2020; 291:110325. [PMID: 31928688 DOI: 10.1016/j.plantsci.2019.110325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 06/18/2019] [Accepted: 10/25/2019] [Indexed: 06/10/2023]
Abstract
In this study, a microRNA microarray was used to investigate the microRNA profiles from young green leaves, and senescent red leaves and yellow leaves of Formosan sweet gum (Liquidambar formosana Hance). The conserved microRNA miR164 was highly expressed in green leaves compared to senescent leaves. The pri-microRNA of miR164 was identified and named lfo-miR164b based on its secondary structure. In Agrobacterium-mediated transient expression experiment, lfo-miR164b was confirmed to regulate the leaf senescence-associated gene LfNAC1 and LfNAC100. Transient overexpression of LfNAC1 induced the expression of leaf senescence genes in Nicotiana benthamiana. In addition, LfNAC1 activated the expression of proLfSGR::YFP, suggesting the regulatory role of LfNAC1 in leaf senescence. In summary, miR164 inhibits the expression of LfNAC1 in spring and summer, later on LfNAC1 actives leaf senescence-associated genes to cause leaf senescence following a gradual decline of miR164 as the seasons change. The "miR164-NAC" regulatory mechanism was confirmed in Formosan sweet gum autumn leaf senescence.
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Affiliation(s)
- Chi-Hsiang Wen
- School of Forestry and Resource Conservation, National Taiwan University, Taipei, Taiwan
| | - Syuan-Fei Hong
- Institute of Biotechnology, National Taiwan University, Taipei, Taiwan
| | - Sin-Fen Hu
- Institute of Biotechnology, National Taiwan University, Taipei, Taiwan
| | - Shih-Shun Lin
- Institute of Biotechnology, National Taiwan University, Taipei, Taiwan; Genome and Systems Biology Degree Program, National Taiwan University, Taipei, Taiwan; Agriculture Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
| | - Fang-Hua Chu
- School of Forestry and Resource Conservation, National Taiwan University, Taipei, Taiwan; Experimental Forest, National Taiwan University, Taiwan.
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185
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Devkar V, Thirumalaikumar VP, Xue GP, Vallarino JG, Turečková V, Strnad M, Fernie AR, Hoefgen R, Mueller-Roeber B, Balazadeh S. Multifaceted regulatory function of tomato SlTAF1 in the response to salinity stress. New Phytol 2020; 225:1681-1698. [PMID: 31597191 DOI: 10.1111/nph.16247] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Accepted: 09/29/2019] [Indexed: 05/11/2023]
Abstract
Salinity stress limits plant growth and has a major impact on agricultural productivity. Here, we identify NAC transcription factor SlTAF1 as a regulator of salt tolerance in cultivated tomato (Solanum lycopersicum). While overexpression of SlTAF1 improves salinity tolerance compared with wild-type, lowering SlTAF1 expression causes stronger salinity-induced damage. Under salt stress, shoots of SlTAF1 knockdown plants accumulate more toxic Na+ ions, while SlTAF1 overexpressors accumulate less ions, in accordance with an altered expression of the Na+ transporter genes SlHKT1;1 and SlHKT1;2. Furthermore, stomatal conductance and pore area are increased in SlTAF1 knockdown plants during salinity stress, but decreased in SlTAF1 overexpressors. We identified stress-related transcription factor, abscisic acid metabolism and defence-related genes as potential direct targets of SlTAF1, correlating it with reactive oxygen species scavenging capacity and changes in hormonal response. Salinity-induced changes in tricarboxylic acid cycle intermediates and amino acids are more pronounced in SlTAF1 knockdown than wild-type plants, but less so in SlTAF1 overexpressors. The osmoprotectant proline accumulates more in SlTAF1 overexpressors than knockdown plants. In summary, SlTAF1 controls the tomato's response to salinity stress by combating both osmotic stress and ion toxicity, highlighting this gene as a promising candidate for the future breeding of stress-tolerant crops.
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Affiliation(s)
- Vikas Devkar
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
- Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Straße 24-25, Haus 20, 14476, Potsdam-Golm, Germany
| | - Venkatesh P Thirumalaikumar
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
- Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Straße 24-25, Haus 20, 14476, Potsdam-Golm, Germany
| | - Gang-Ping Xue
- CSIRO Agriculture and Food, St Lucia, Qld, 4067, Australia
| | - José G Vallarino
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Veronika Turečková
- Laboratory of Growth Regulators, The Czech Academy of Sciences, Institute of Experimental Botany, Palacký University, Šlechtitelů 27, CZ-78371, Olomouc, Czech Republic
| | - Miroslav Strnad
- Laboratory of Growth Regulators, The Czech Academy of Sciences, Institute of Experimental Botany, Palacký University, Šlechtitelů 27, CZ-78371, Olomouc, Czech Republic
| | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Rainer Hoefgen
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Bernd Mueller-Roeber
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
- Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Straße 24-25, Haus 20, 14476, Potsdam-Golm, Germany
| | - Salma Balazadeh
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, the Netherlands
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186
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Fuertes-Martín R, Correig X, Vallvé JC, Amigó N. Title: Human Serum/Plasma Glycoprotein Analysis by 1H-NMR, an Emerging Method of Inflammatory Assessment. J Clin Med 2020; 9:E354. [PMID: 32012794 PMCID: PMC7073769 DOI: 10.3390/jcm9020354] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/13/2020] [Accepted: 01/17/2020] [Indexed: 12/17/2022] Open
Abstract
Several studies suggest that variations in the concentration of plasma glycoproteins can influence cellular changes in a large number of diseases. In recent years, proton nuclear magnetic resonance (1H-NMR) has played a major role as an analytical tool for serum and plasma samples. In recent years, there is an increasing interest in the characterization of glycoproteins through 1H-NMR in order to search for reliable and robust biomarkers of disease. The objective of this review was to examine the existing studies in the literature related to the study of glycoproteins from an analytical and clinical point of view. There are currently several techniques to characterize circulating glycoproteins in serum or plasma, but in this review, we focus on 1H-NMR due to its great robustness and recent interest in its translation to the clinical setting. In fact, there is already a marker in H-NMR representing the acetyl groups of the glycoproteins, GlycA, which has been increasingly studied in clinical studies. A broad search of the literature was performed showing a general consensus that GlycA is a robust marker of systemic inflammation. The results also suggested that GlycA better captures systemic inflammation even more than C-reactive protein (CRP), a widely used classical inflammatory marker. The applications reviewed here demonstrated that GlycA was potentially a key biomarker in a wide range of diseases such as cancer, metabolic diseases, cardiovascular risk, and chronic inflammatory diseases among others. The profiling of glycoproteins through 1H-NMR launches an encouraging new paradigm for its future incorporation in clinical diagnosis.
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Affiliation(s)
- Rocío Fuertes-Martín
- Biosfer Teslab SL, 43201 Reus, Spain; (R.F.-M.); (N.A.)
- Metabolomic s platform, IISPV, CIBERDEM, Rovira i Virgili University, 43007 Tarragona, Spain
| | - Xavier Correig
- Metabolomic s platform, IISPV, CIBERDEM, Rovira i Virgili University, 43007 Tarragona, Spain
| | - Joan-Carles Vallvé
- Metabolomic s platform, IISPV, CIBERDEM, Rovira i Virgili University, 43007 Tarragona, Spain
- Lipids and Arteriosclerosis Research Unit, Sant Joan de Reus University Hospital, 43201 Reus, Spain
| | - Núria Amigó
- Biosfer Teslab SL, 43201 Reus, Spain; (R.F.-M.); (N.A.)
- Metabolomic s platform, IISPV, CIBERDEM, Rovira i Virgili University, 43007 Tarragona, Spain
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187
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Li P, Wang X, Xu C, Liu C, Zheng C, Fulham MJ, Feng D, Wang L, Song S, Huang G. 18F-FDG PET/CT radiomic predictors of pathologic complete response (pCR) to neoadjuvant chemotherapy in breast cancer patients. Eur J Nucl Med Mol Imaging 2020; 47:1116-26. [PMID: 31982990 DOI: 10.1007/s00259-020-04684-3] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 01/03/2020] [Indexed: 12/17/2022]
Abstract
PURPOSE Pathologic complete response (pCR) to neoadjuvant chemotherapy (NAC) is commonly accepted as the gold standard to assess outcome after NAC in breast cancer patients. 18F-Fluorodeoxyglucose positron emission tomography/computed tomography (PET/CT) has unique value in tumor staging, predicting prognosis, and evaluating treatment response. Our aim was to determine if we could identify radiomic predictors from PET/CT in breast cancer patient therapeutic efficacy prior to NAC. METHODS This retrospective study included 100 breast cancer patients who received NAC; there were 2210 PET/CT radiomic features extracted. Unsupervised and supervised machine learning models were used to identify the prognostic radiomic predictors through the following: (1) selection of the significant (p < 0.05) imaging features from consensus clustering and the Wilcoxon signed-rank test; (2) selection of the most discriminative features via univariate random forest (Uni-RF) and the Pearson correlation matrix (PCM); and (3) determination of the most predictive features from a traversal feature selection (TFS) based on a multivariate random forest (RF). The prediction model was constructed with RF and then validated with 10-fold cross-validation for 30 times and then independently validated. The performance of the radiomic predictors was measured in terms of area under the curve (AUC), sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV). RESULTS The PET/CT radiomic predictors achieved a prediction accuracy of 0.857 (AUC = 0.844) on the training split set and 0.767 (AUC = 0.722) on the independent validation set. When age was incorporated, the accuracy for the split set increased to 0.857 (AUC = 0.958) and 0.8 (AUC = 0.73) for the independent validation set and both outperformed the clinical prediction model. We also found a close association between the radiomic features, receptor expression, and tumor T stage. CONCLUSION Radiomic predictors from pre-treatment PET/CT scans when combined with patient age were able to predict pCR after NAC. We suggest that these data will be valuable for patient management.
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188
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Kong XM, Zhou Q, Zhou X, Wei BD, Ji SJ. Transcription factor Ca NAC1 regulates low-temperature-induced phospholipid degradation in green bell pepper. J Exp Bot 2020; 71:1078-1091. [PMID: 31626291 DOI: 10.1093/jxb/erz463] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Accepted: 10/03/2019] [Indexed: 06/10/2023]
Abstract
Phospholipids constitute the main component of biomembranes. During low-temperature storage and transportation of harvested bell peppers (Capsicum annuum), chilling injury participates in their decay. A primary cause of this chilling injury is phospholipid degradation. In this study, three genes encoding phospholipase D (PLD) were identified from bell peppers and their activities were examined under cold stress. Low temperature (4 °C) induced strong accumulation of the CaPLDα4 transcript, suggesting that it is associated with the phenomenon of phospholipid degradation and destruction of cell membranes. Low temperature also significantly induced increased amounts of NAM-ATAF1/2-CUC2 (NAC) domain transcription factors. CaNAC1 was found to interact with the promoter of CaPLD4 in a yeast one-hybrid screen. Electrophoretic mobility shift and ß-glucuronidase reporter assays demonstrated that CaNAC1 binds to the CTGCAG motif in the CaPLDα4 promoter, thereby activating its transcription and controlling phospholipid degradation. The ubiquitination sites of the CaNAC1 protein were characterized by liquid chromatography-tandem mass spectrometry. We conclude that CaNAC1 is a transcriptional activator of CaPLDα4 and suggested that it participates in the degradation of membrane lipids in bell peppers when they are stored at low temperature.
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Affiliation(s)
- Xi-Man Kong
- Department of Food Science, Shenyang Agricultural University, Shenyang, PR China
| | - Qian Zhou
- Department of Food Science, Shenyang Agricultural University, Shenyang, PR China
| | - Xin Zhou
- Department of Food Science, Shenyang Agricultural University, Shenyang, PR China
| | - Bao-Dong Wei
- Department of Food Science, Shenyang Agricultural University, Shenyang, PR China
| | - Shu-Juan Ji
- Department of Food Science, Shenyang Agricultural University, Shenyang, PR China
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189
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Wong A, Heard K, Graudins A, Dart R, Sivilotti MLA. Adducts Post Acetaminophen Overdose Treated with a 12-Hour vs 20-Hour Acetylcysteine Infusion. J Med Toxicol 2020; 16:188-194. [PMID: 31939054 DOI: 10.1007/s13181-020-00757-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 11/28/2019] [Accepted: 01/04/2020] [Indexed: 10/25/2022] Open
Abstract
INTRODUCTION Acetaminophen protein adducts in the circulation are a specific biomarker of acetaminophen oxidation, and may be a more sensitive measure of impending hepatic injury following overdose than alanine transaminase (ALT). We performed an exploratory analytical substudy of adducts during a clinical trial (NACSTOP) of abbreviated (12-hour) versus control (20-hour) acetylcysteine to identify any signal of diminished antidotal effectiveness with shortened therapy. METHODS We measured adducts at 0, 12, and 20 hours from a convenience sample of subjects enrolled in the cluster-controlled NACSTOP trial evaluating a 12-hour ("abbreviated"; 200 mg/kg over 4 hours, 50 mg/kg over 8 hours) vs 20-hour acetylcysteine regimen ("control"; 200 mg/kg over 4 hours, 100 mg/kg over 16 hours). Adducts were assayed using high-performance liquid chromatography/mass spectrometry. RESULTS Median ALT 20 hours after the initiation of acetylcysteine was 12 U/L (IQR 8,14) in the abbreviated 12-hour regimen group (N = 8), compared with the control group 16 U/L (IQR 11,21; N = 21) (p = 0.46). Adduct concentrations were similarly low in both groups: abbreviated [(0.005 μmol/L, IQR (0,0.14)] and control [(0.005 μmol/L, IQR (0,0.05)] (p = 0.61). CONCLUSIONS There were minimal to no acetaminophen protein adducts detected. These findings further support discontinuing acetylcysteine when acetaminophen concentrations are low and liver function tests normal after 12 hours of treatment.
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Affiliation(s)
- Anselm Wong
- School of Clinical Sciences, Department of Medicine, Monash University, Melbourne, Victoria, Australia. .,Centre for Integrated Critical Care, University of Melbourne, Melbourne, Victoria, Australia. .,Victorian Poisons Information Centre and Austin Toxicology Service, Austin Hospital, Heidelberg, Victoria, 3084, Australia.
| | - Kennon Heard
- Rocky Mountain Poison and Drug Center, Denver Health and Hospitals, Denver, CO, USA.,Section of Medical Pharmacology and Toxicology, Department of Emergency Medicine, University of Colorado, Aurora, CO, USA
| | - Andis Graudins
- School of Clinical Sciences, Department of Medicine, Monash University, Melbourne, Victoria, Australia.,Monash Toxicology Service, Monash Health, School of Clinical Sciences, Department of Medicine, Monash University, Melbourne, Victoria, Australia
| | - Richard Dart
- Rocky Mountain Poison and Drug Center, Denver Health and Hospital Authority, Denver, CO, USA
| | - Marco L A Sivilotti
- Departments of Emergency Medicine, and of Biomedical & Molecular Sciences, Queen's University, Kingston, Ontario, Canada
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Yao W, Zhang D, Zhou B, Wang J, Li R, Jiang T. Over-expression of poplar NAC15 gene enhances wood formation in transgenic tobacco. BMC Plant Biol 2020; 20:12. [PMID: 31914923 PMCID: PMC6950812 DOI: 10.1186/s12870-019-2191-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 12/08/2019] [Indexed: 05/05/2023]
Abstract
BACKGROUND NAC (NAM/ATAF/CUC) is one of the largest plant-specific transcription factor (TF) families known to play significant roles in wood formation. Acting as master gene regulators, a few NAC genes can activate secondary wall biosynthesis during wood formation in woody plants. RESULTS In the present study, firstly, we screened 110 differentially expressed NAC genes in the leaves, stems, and roots of di-haploid Populus simonii×P. nigra by RNA-Seq. Then we identified a nucleus-targeted gene, NAC15 gene, which was one of the highly expressed genes in the stem among 110 NAC family members. Thirdly, we conducted expression pattern analysis of NAC15 gene, and observed NAC15 gene was most highly expressed in the xylem by RT-qPCR. Moreover, we transferred NAC15 gene into tobacco and obtained 12 transgenic lines overexpressing NAC15 gene (TLs). And the relative higher content of hemicellulose, cellulose and lignin was observed in the TLs compared to the control lines containing empty vector (CLs). It also showed darker staining in the culms of the TLs with phloroglucinol staining, compared to the CLs. Furthermore, the relative expression level of a few lignin- and cellulose-related genes was significantly higher in the TLs than that in the CLs. CONCLUSIONS The overall results indicated that NAC15 gene is highly expressed in the xylem of poplar and may be a potential candidate gene playing an important role in wood formation in transgenic tobacco.
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Affiliation(s)
- Wenjing Yao
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 51 Hexing Road, Harbin, 150040, China
- Co-Innovation Center for Sustainable Forestry in Southern China/Bamboo Research Institute, Nanjing Forestry University, 159 Longpan Road, Nanjing, 210037, China
| | - Dawei Zhang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 51 Hexing Road, Harbin, 150040, China
| | - Boru Zhou
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 51 Hexing Road, Harbin, 150040, China.
| | - Jianping Wang
- Department of Agronomy, University of Florida, 2033 Mowry Road, Gainesville, FL, 32610, USA
| | - Renhua Li
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 51 Hexing Road, Harbin, 150040, China
| | - Tingbo Jiang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 51 Hexing Road, Harbin, 150040, China.
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Tolosa LN, Zhang Z. The Role of Major Transcription Factors in Sola naceous Food Crops under Different Stress Conditions: Current and Future Perspectives. Plants (Basel) 2020; 9:plants9010056. [PMID: 31906447 PMCID: PMC7020414 DOI: 10.3390/plants9010056] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 12/09/2019] [Accepted: 12/21/2019] [Indexed: 01/08/2023]
Abstract
Plant growth, development, and productivity are adversely affected by environmental stresses such as drought (osmotic stress), soil salinity, cold, oxidative stress, irradiation, and diverse diseases. These impacts are of increasing concern in light of climate change. Noticeably, plants have developed their adaptive mechanism to respond to environmental stresses by transcriptional activation of stress-responsive genes. Among the known transcription factors, DoF, WRKY, MYB, NAC, bZIP, ERF, ARF and HSF are those widely associated with abiotic and biotic stress response in plants. Genome-wide identification and characterization analyses of these transcription factors have been almost completed in major solanaceous food crops, emphasizing these transcription factor families which have much potential for the improvement of yield, stress tolerance, reducing marginal land and increase the water use efficiency of solanaceous crops in arid and semi-arid areas where plant demand more water. Most importantly, transcription factors are proteins that play a key role in improving crop yield under water-deficient areas and a place where the severity of pathogen is very high to withstand the ongoing climate change. Therefore, this review highlights the role of major transcription factors in solanaceous crops, current and future perspectives in improving the crop traits towards abiotic and biotic stress tolerance and beyond. We have tried to accentuate the importance of using genome editing molecular technologies like CRISPR/Cas9, Virus-induced gene silencing and some other methods to improve the plant potential in giving yield under unfavorable environmental conditions.
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Affiliation(s)
- Lemessa Negasa Tolosa
- Key Laboratory of Agricultural Water Resources, Hebie Laboratory of Agricultural Water Saving, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Shijiazhuang 050021, China;
- University of Chinese Academy Sciences, Beijing 100049, China
- Innovation Academy for Seed Design, Chinese Academy of Sciences CAS, Beijing 100101, China
| | - Zhengbin Zhang
- Key Laboratory of Agricultural Water Resources, Hebie Laboratory of Agricultural Water Saving, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Shijiazhuang 050021, China;
- University of Chinese Academy Sciences, Beijing 100049, China
- Innovation Academy for Seed Design, Chinese Academy of Sciences CAS, Beijing 100101, China
- Correspondence:
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Ju YL, Yue XF, Min Z, Wang XH, Fang YL, Zhang JX. Vv NAC17, a novel stress-responsive grapevine (Vitis vinifera L.) NAC transcription factor, increases sensitivity to abscisic acid and enhances salinity, freezing, and drought tolerance in transgenic Arabidopsis. Plant Physiol Biochem 2020; 146:98-111. [PMID: 31734522 DOI: 10.1016/j.plaphy.2019.11.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 10/24/2019] [Accepted: 11/02/2019] [Indexed: 05/07/2023]
Abstract
Drought stress is the primary factor limiting the growth and fruit quality of grapevines worldwide. However, the biological function of the NAC [No apical meristem (NAM), Arabidopsis transcription activation factor (ATAF), Cup-shaped cotyledon (CUC)] transcription factor (TF) in grapevine is not clear. In this study, we reported that VvNAC17, a novel NAC transcription factor, was expressed in various tissues following drought, high temperature (45 °C), freezing (4 °C), salicylic acid (SA), and abscisic acid (ABA) treatments in grapevine. The VvNAC17 protein was localized in the nucleus of Arabidopsis thaliana protoplasts and demonstrated transcriptional activation activities at its C-terminus in yeast. The VvNAC17 gene was overexpressed in Arabidopsis thaliana. Under mannitol and salt stress, the germination rates of the VvNAC17-overexpression lines were higher than those of the wild-type plants, as were the root lengths. The VvNAC17-overexpression lines showed greater tolerance to freezing stress along with a higher survival rate. Following ABA treatment, the seed germination rate and the root length of the VvNAC17-overexpression lines were inhibited, and the stomatal opening and stomatal density were reduced. When subjected to drought and dehydration stress, the VvNAC17-overexpression lines showed improved survival and reduced water loss rates in comparison to the wild-type plants. Under drought conditions, the VvNAC17-overexpression lines had lower malondialdehyde and H2O2 contents, but higher peroxidase, superoxide dismutase, and catalase activities as well as higher proline content. Moreover, the expression of marker genes, including ABI5, AREB1, COR15A, COR47, P5CS, RD22, and RD29A, was up-regulated in the VvNAC17-overexpression lines when subjected to ABA and drought treatments. The results suggest that in transgenic Arabidopsis over-expression of VvNAC17 enhances resistance to drought while up-regulating the expression of ABA- and stress-related genes.
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Affiliation(s)
- Yan-Lun Ju
- College of Enology, Northwest A & F University, Yangling, Shaanxi, 712100, China.
| | - Xiao-Feng Yue
- College of Enology, Northwest A & F University, Yangling, Shaanxi, 712100, China.
| | - Zhuo Min
- Department of Brewing Engineering, Moutai University, Renhuai, Guizhou, 564507, China.
| | - Xian-Hang Wang
- College of Enology, Northwest A & F University, Yangling, Shaanxi, 712100, China.
| | - Yu-Lin Fang
- College of Enology, Northwest A & F University, Yangling, Shaanxi, 712100, China.
| | - Jun-Xiang Zhang
- Ningxia Grape and Wine Research Institute, Ningxia University, Yinchuan, Ningxia, 750000, China.
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Li X, Xie L, Zheng H, Cai M, Cheng Z, Bai Y, Li J, Gao J. Transcriptome profiling of postharvest shoots identifies PheNAP2- and PheNAP3-promoted shoot senescence. Tree Physiol 2019; 39:2027-2044. [PMID: 31595958 DOI: 10.1093/treephys/tpz100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 09/11/2018] [Accepted: 09/12/2019] [Indexed: 06/10/2023]
Abstract
The juvenile shoots of Phyllostachys edulis have been used as a food source for thousands of years, and it is recognized as a potential source of nutraceuticals. However, its rapid senescence restricts bamboo production and consumption, and the underlying molecular mechanisms of rapid shoot senescence remain largely unclear. In the present study, transcriptome profiling was employed to investigate the molecular regulation of postharvest senescence in shoots, along with physiological assays and anatomical dissections. Results revealed a distinct shift in expression postharvest, specifically transitions from cellular division and differentiation to the relocation of nutrients and programmed cell death. A number of regulatory and signaling factors were induced during postharvest senescence. Moreover, transcription factors, including NAM, ATAF and CUC (NAC) transcription factors, basic helix-loop-helix transcription factors, basic region/leucine zipper transcription factors, MYB transcription factors and WRKY transcription factors, were critical for shoot postharvest senescence, of which NACs were the most abundant. PheNAP2 and PheNAP3 were induced in postharvest shoots and found to promote leaf senescence in Arabidopsis by inducing the expression of AtSAG12 and AtSAG113. PheNAP2 and PheNAP3 could both restore the stay-green Arabidopsis nap to the wild-type phenotype either under normal growth condition or under abscisic acid treatment. Collectively, these results suggest that PheNAPs may promote shoot senescence. These findings provide a systematic view of shoot senescence and will inform future studies on the underlying molecular mechanisms responsible for shoot degradation during storage.
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Affiliation(s)
- Xiangyu Li
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry and Grassland Administration, Futong East Street NO.8, Chaoyang District, Beijing, 100102, People's Republic of China
| | - Lihua Xie
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry and Grassland Administration, Futong East Street NO.8, Chaoyang District, Beijing, 100102, People's Republic of China
| | - Huifang Zheng
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry and Grassland Administration, Futong East Street NO.8, Chaoyang District, Beijing, 100102, People's Republic of China
| | - Miaomiao Cai
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry and Grassland Administration, Futong East Street NO.8, Chaoyang District, Beijing, 100102, People's Republic of China
| | - Zhanchao Cheng
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry and Grassland Administration, Futong East Street NO.8, Chaoyang District, Beijing, 100102, People's Republic of China
| | - Yucong Bai
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry and Grassland Administration, Futong East Street NO.8, Chaoyang District, Beijing, 100102, People's Republic of China
| | - Juan Li
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry and Grassland Administration, Futong East Street NO.8, Chaoyang District, Beijing, 100102, People's Republic of China
| | - Jian Gao
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry and Grassland Administration, Futong East Street NO.8, Chaoyang District, Beijing, 100102, People's Republic of China
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Liu W, Zhao BG, Chao Q, Wang B, Zhang Q, Zhang C, Li S, Jin F, Yang D, Li X. Function analysis of Zm NAC33, a positive regulator in drought stress response in Arabidopsis. Plant Physiol Biochem 2019; 145:174-183. [PMID: 31704591 DOI: 10.1016/j.plaphy.2019.10.038] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 10/26/2019] [Accepted: 10/27/2019] [Indexed: 05/27/2023]
Abstract
Drought significantly affects plant growth and has devastating effects on crop production, NAC transcription factors respond to abiotic stresses by activating gene expression. In this study, a maize NAC transcription factor, ZmNAC33, was cloned and characterized its function in Arabidopsis. Transient transformation in Arabidopsis leaves mesophyll protoplasts and trans-activation assays in yeast showed that ZmNAC33 was localized in the nucleus and had transactivation activity. qRT-PCR analysis showed that ZmNAC33 in maize was induced by drought, high salinity and abscisic acid (ABA) stress. Promoter analysis identified multiple stress-related cis-acting elements in the promoter region of ZmNAC33. In ZmNAC33 transgenic Arabidopsis, germination rates were higher than in wild type plants under ABA and osmotic stress at the germination stage, and overexpression lines exhibited higher survival rates and higher antioxidant enzyme activities compared with wild type under drought stress. These results indicate that ZmNAC33 actes as a positive regulator in drought tolerance in plants.
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Affiliation(s)
- Wenping Liu
- Agronomy College of Northeast Agricultural University, Harbin, 150030, Heilongjiang, China; Crop Germplasm Resources Institute, Jilin Academy of Agricultural Sciences, Gongzhuling, 136100, China
| | - Biligen-Gaowa Zhao
- Key Laboratory of Photobiology, Photosynthesis Research Center, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Qing Chao
- Key Laboratory of Photobiology, Photosynthesis Research Center, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Baichen Wang
- Key Laboratory of Photobiology, Photosynthesis Research Center, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Qian Zhang
- Agronomy College of Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Chunxiao Zhang
- Crop Germplasm Resources Institute, Jilin Academy of Agricultural Sciences, Gongzhuling, 136100, China
| | - Shufang Li
- Crop Germplasm Resources Institute, Jilin Academy of Agricultural Sciences, Gongzhuling, 136100, China
| | - Fengxue Jin
- Crop Germplasm Resources Institute, Jilin Academy of Agricultural Sciences, Gongzhuling, 136100, China
| | - Deguang Yang
- Agronomy College of Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Xiaohui Li
- Crop Germplasm Resources Institute, Jilin Academy of Agricultural Sciences, Gongzhuling, 136100, China.
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195
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Li M, Cheng C, Zhang X, Zhou S, Wang C, Ma C, Yang S. PpNAC187 Enhances Lignin Synthesis in 'Whangkeumbae' Pear ( Pyrus pyrifolia) 'Hard-End' Fruit. Molecules 2019; 24:E4338. [PMID: 31783586 PMCID: PMC6930614 DOI: 10.3390/molecules24234338] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 11/23/2019] [Accepted: 11/25/2019] [Indexed: 11/16/2022] Open
Abstract
A disorder in pears that is known as 'hard-end' fruit affects the appearance, edible quality, and market value of pear fruit. RNA-Seq was carried out on the calyx end of 'Whangkeumbae' pear fruit with and without the hard-end symptom to explore the mechanism underlying the formation of hard-end. The results indicated that the genes in the phenylpropanoid pathway affecting lignification were up-regulated in hard-end fruit. An analysis of differentially expressed genes (DEGs) identified three NAC transcription factors, and RT-qPCR analysis of PpNAC138, PpNAC186, and PpNAC187 confirmed that PpNAC187 gene expression was correlated with the hard-end disorder in pear fruit. A transient increase in PpNAC187 was observed in the calyx end of 'Whangkeumbae' fruit when they began to exhibit hard-end symptom. Concomitantly, the higher level of PpCCR and PpCOMT transcripts was observed, which are the key genes in lignin biosynthesis. Notably, lignin content in the stem and leaf tissues of transgenic tobacco overexpressing PpNAC187 was significantly higher than in the control plants that were transformed with an empty vector. Furthermore, transgenic tobacco overexpressing PpNAC187 had a larger number of xylem vessel elements. The results of this study confirmed that PpNAC187 functions in inducing lignification in pear fruit during the development of the hard-end disorder.
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Affiliation(s)
- Mingtong Li
- College of Horticulture, Qingdao Agricultural University, No. 700 Changcheng Road, Chengyang, Qingdao 266109, China; (M.L.); (C.C.); (X.Z.); (C.W.); (C.M.)
| | - Chenxia Cheng
- College of Horticulture, Qingdao Agricultural University, No. 700 Changcheng Road, Chengyang, Qingdao 266109, China; (M.L.); (C.C.); (X.Z.); (C.W.); (C.M.)
| | - Xinfu Zhang
- College of Horticulture, Qingdao Agricultural University, No. 700 Changcheng Road, Chengyang, Qingdao 266109, China; (M.L.); (C.C.); (X.Z.); (C.W.); (C.M.)
| | - Suping Zhou
- Department of Agricultural and Environmental Sciences, College of Agriculture, Tennessee State University, 3500 John Merritt Blvd, Nashville, TN 37209, USA;
| | - Caihong Wang
- College of Horticulture, Qingdao Agricultural University, No. 700 Changcheng Road, Chengyang, Qingdao 266109, China; (M.L.); (C.C.); (X.Z.); (C.W.); (C.M.)
| | - Chunhui Ma
- College of Horticulture, Qingdao Agricultural University, No. 700 Changcheng Road, Chengyang, Qingdao 266109, China; (M.L.); (C.C.); (X.Z.); (C.W.); (C.M.)
| | - Shaolan Yang
- College of Horticulture, Qingdao Agricultural University, No. 700 Changcheng Road, Chengyang, Qingdao 266109, China; (M.L.); (C.C.); (X.Z.); (C.W.); (C.M.)
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Zhu X, Xue J, Gu X, Chen G, Cao F, Shan H, Wang D, Qiao X, Liu C, Zhang Y. Neoadjuvant Chemotherapy Plays an Adverse Role in the Prognosis of Grade 2 Breast Cancer. J Cancer 2019; 10:5661-5670. [PMID: 31737103 PMCID: PMC6843887 DOI: 10.7150/jca.33168] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 08/13/2019] [Indexed: 12/24/2022] Open
Abstract
Background: The role of neoadjuvant chemotherapy (NAC) in the prognosis of breast cancer among patients with grade 2 tumors remains unclear. As such, we aimed to explore the relationships between NAC and survival outcomes among patients with grade 2 breast cancer. Materials and Methods: We collected data on 726 breast cancer patients with grade 2 tumors and at least 5-years of follow-up from the date of diagnosis. We then conducted survival analyses to examine the association between NAC and disease-free survival (DFS) and overall survival (OS). The role of NAC in prognosis was further examined in subgroup analyses, with patients stratified according to molecular subtypes, histological grade, ER status, PR status, HER2 status and Ki67 index. We also determined the main sites of local recurrence, as well as these organs involved in distant metastasis among patients receiving NAC. Finally, we analyzed independent predictive factors for DFS and OS using Cox regression analyses. Results: Among patients who received NAC, the prevalence of pathologic complete response (pCR) was 9.87% (23/233), with 32.6% of patients (76/233) experiencing partial response. Survival analyses demonstrated that NAC had an overall adverse effect on DFS and OS. Subgroup analyses showed that patients who received NAC had shorter DFS in all molecular subgroups of breast cancer, with exception of triple negative breast cancer (TNBC) patients. NAC was also associated with shorter OS among patients with histological grade of 2 and a low Ki67 index. The main recurrence site was the chest well, while distant metastasis occurred in the bone, liver and lung. In Cox regression analyses, we found that NAC was an independent predictor for DFS, but not for OS. Conclusions: NAC may have an adverse effect on breast cancer prognosis among patients with grade 2 tumors. These patients need not receive NAC, except when the patient has a strong desire for breast conservation, and this is unlikely to be achieved in the absence of NAC.
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Affiliation(s)
- Xudong Zhu
- Department of Breast Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, 110004, China
| | - Jinqi Xue
- Department of Breast Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, 110004, China
| | - Xi Gu
- Department of Breast Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, 110004, China
| | - Guanglei Chen
- Department of Breast Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, 110004, China
| | - Fangning Cao
- Department of Breast Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, 110004, China
| | - Huilian Shan
- Department of Breast Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, 110004, China
| | - Dan Wang
- Department of Breast Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, 110004, China
| | - Xinbo Qiao
- Department of Breast Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, 110004, China
| | - Caigang Liu
- Department of Breast Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, 110004, China.,Yan'an Hospital of China Medical University, Yanan, Shanxi Province, 716000, China
| | - Yixiao Zhang
- Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, 110004, China
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Laschuk MJ, Head LK, Roumeliotis GA, Xuan L, Silverman HJ. The rule of thirds: Determining the ideal areolar proportions. JPRAS Open 2019; 23:55-59. [PMID: 32158906 PMCID: PMC7061663 DOI: 10.1016/j.jpra.2019.11.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 11/07/2019] [Indexed: 11/28/2022] Open
Abstract
Background Breast surgery often requires changing the diameter of the areola. Recommended areolar size is commonly based on population averages, or surgical judgement. An ideal areola size has not been previously been described. We hypothesized that the ideal areolar diameter would be proportional to two breast measurements not commonly altered during breast surgery: the nipple diameter and breast base width. Methods 'The Sun' newspaper (London, UK) publishes photographs of topless models which are selected based on the aesthetic appeal of their non-operated breasts. The publication's archive, from March 2014 to January 2017, was independently reviewed by three authors to identify photographs that presented a clear anterior view of the breast. The base width, nipple diameter and areolar diameter were measured independently by each reviewer. Measurements were pooled, and the mean was included for analysis. Ratios of the areolar diameter to the base width and the nipple diameter were calculated. Results The photographs of 58 models were eligible for inclusion. The average areolar diameter to base width was 0.29 (SD = 0.05). The average nipple to areolar diameter was 0.29 (SD = 0.06). Conclusions In aesthetically pleasing breasts, the areolar diameter is proportional to both the breast base width and nipple diameter. Breast base width is commonly measured preoperatively in aesthetic breast procedures, and is not typically modified. Breast base width can therefore be used to determine the ideal areolar size using the ratio of areola:base width ratio of 0.29 identified in this study.
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Affiliation(s)
- Matthew J Laschuk
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Faculty of Medicine, University of Ottawa, The Ottawa Hospital - Civic Campus, 1053 Carling Avenue Box 213, K1Y 4E9 Ottawa, ON, Canada
| | - Linden K Head
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Faculty of Medicine, University of Ottawa, The Ottawa Hospital - Civic Campus, 1053 Carling Avenue Box 213, K1Y 4E9 Ottawa, ON, Canada
| | | | - Lisa Xuan
- Faculty of Medicine, University of Ottawa, Canada
| | - Howard J Silverman
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Faculty of Medicine, University of Ottawa, The Ottawa Hospital - Civic Campus, 1053 Carling Avenue Box 213, K1Y 4E9 Ottawa, ON, Canada
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Petrioli R, Marrelli D, Roviello F, D'Ignazio A, Torre P, Chirra M, Savelli V, Ambrosio MR, Francini G, Calomino N, Farsi M, Vernillo R, Francini E. Pathological response and outcome after neoadjuvant chemotherapy with DOC (docetaxel, oxaliplatin, capecitabine) or EOF (epirubicin, oxaliplatin, 5-fluorouracil) for clinical T3-T4 non-metastatic gastric cancer. Surg Oncol 2019; 32:2-7. [PMID: 31670056 DOI: 10.1016/j.suronc.2019.10.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 08/29/2019] [Accepted: 10/02/2019] [Indexed: 02/07/2023]
Abstract
PURPOSE In this prospective observational study, we sought to compare the efficacy and safety of docetaxel + oxaliplatin + capecitabine (DOC) with epirubicin + oxaliplatin + 5-fluouracil (EOF) as neoadjuvant chemotherapy (NAC) for clinical T3 or T4 non-metastatic gastric cancer (GC) patients. METHODS The DOC NAC consisted of docetaxel 35 mg/m2 (days 1-8), oxaliplatin 85 mg/m2 (day 1), and capecitabine 750 mg/m2 twice daily (days 1-14), every 3 weeks. The EOF NAC consisted of intravenous (IV) epirubicin 50 mg/m2 combined with IV oxaliplatin 130 mg/m2 on day 1 and continuous infusion 5-fluouracil 750 mg/m2 on days 1-5, every 3 weeks. After 4 cycles of NAC or upon progression during chemotherapy, patients underwent gastrectomy with standard D2 or D3 lymphadenectomy. Pathological complete response rate per Becker tumor regression grading system was the primary endpoint and the secondary endpoints included progression-free survival (2-yr PFS) and 2-year overall survival (2-yr OS) and tolerability. RESULTS Overall, we identified 63 patients with T3-4 non-metastatic GC starting either NAC regimen between January 2010 and December 2017 at our Institution: 34 in the DOC group and 29 in EOF group. Thirty patients (88%) in the DOC group and 22 (76%) in the EOF group completed the 4 planned cycles of NAC. Fifty-seven patients received surgery. Results indicated no statistical significant differences between the two groups, and only a trend for some better data in favour of the DOC group. The R0 resection rate was 90.6% and 88.0% for the DOC and EOF cohorts, respectively. The pathological complete response rate was 6.2% in the DOC group and 4.0% in the EOF group. Becker 1-2 pathological response was found in 46.8% of the DOC cohort and 28.0% of the EOF cohort (p = .14). The 2-yr PFS rate was 54.1% for DOC vs. 41.4% for EOF (p = .14) and the 2-yr OS rate was 80.8% for DOC vs. 58.6% for EOF (p = .05). Neutropenia was the most common grade ≥3 toxicity and occurred in 8 (23.5%) patients of the DOC group and 10 (34.4%) patients of the EOF group (p = .33). CONCLUSIONS These findings seem to confirm the feasibility of NAC for clinically T3 and T4 non-metastatic GC and, despite no statistical significant difference was documented, suggest a trend for better activity and tolerability for the docetaxel-based regimen (DOC) compared to the epirubicin-based combination (EOF).
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Affiliation(s)
- Roberto Petrioli
- Medical Oncology Unit, Department of Medicine, Surgery and Neurosciences, University of Siena, Italy.
| | - Daniele Marrelli
- General Surgery and Surgical Oncology Department, University of Siena, Italy
| | - Franco Roviello
- General Surgery and Surgical Oncology Department, University of Siena, Italy
| | - Alessia D'Ignazio
- General Surgery and Surgical Oncology Department, University of Siena, Italy
| | - Pamela Torre
- Medical Oncology Unit, Department of Medicine, Surgery and Neurosciences, University of Siena, Italy
| | - Martina Chirra
- Medical Oncology Unit, Department of Medicine, Surgery and Neurosciences, University of Siena, Italy
| | - Vinno Savelli
- General Surgery and Surgical Oncology Department, University of Siena, Italy
| | | | - Guido Francini
- Medical Oncology Unit, Department of Medicine, Surgery and Neurosciences, University of Siena, Italy
| | - Natale Calomino
- Clinical Surgery, Department of Surgery and Bioengineering, University of Siena, Siena, Italy
| | - Marco Farsi
- Dept Medical Biotechnology, Section of Pathology, University of Siena, Italy
| | - Remo Vernillo
- Clinical Surgery and Surgical Endoscopy, University of Siena, Siena, Italy
| | - Edoardo Francini
- La Sapienza University, Rome, Italy; Oncology Unit, Misericordia Hospital, Grosseto, Italy
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199
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Timmermann L, Rosumeck N, Klein F, Pratschke J, Pelzer U, Bahra M, Malinka T. Neoadjuvant Chemotherapy Enhances Local Postoperative Histopathological Tumour Stage in Borderline Resectable Pancreatic Cancer - A Matched-Pair Analysis. Anticancer Res 2019; 39:5781-5787. [PMID: 31570482 DOI: 10.21873/anticanres.13781] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 09/14/2019] [Accepted: 09/17/2019] [Indexed: 11/10/2022]
Abstract
BACKGROUND Neoadjuvant chemotherapy (NAC) is established in the treatment of ductal pancreatic adenocarcinoma for downsizing borderline-resectable pancreatic cancer (BRPC) and may affect nodal positivity and rates of R0 resection. This study aimed to identify the impact of NAC on postoperative histopathological parameters with a prognostic relevance. PATIENTS AND METHODS A one-to-three matched-pair analysis, including an overall total of 132 patients (25% treated with NAC and subsequent resection and 75% undergoing upfront surgery) was performed. Influence of NAC on nodal positivity, lymphatic, vascular and perineural invasion, as well as resection stage and grading, was examined. Furthermore, perioperative complications, in-hospital stay, re-admission rates, mortality, as well as preoperative body mass index and American Association of Anesthesiologist classification scores, were evaluated. RESULTS Patients treated with NAC significantly less frequently had lymphatic tissue invasion (lymph node invasion: 51.5% vs. 72.7%; p=0.032, and lymphatic vessel invasion 9.4% vs. 55.3%; p=0.0004), whereas vascular and perineural invasion, as well as grading and resection state were not significantly different. Carbohydrate antigen 19-9 regression in correlation with nodal positivity also did not differ, and both groups showed comparable perioperative complication rates. Occurrence and severity of postoperative pancreatic fistula (18.2% vs. 24.3%; p=0.034) were significantly lower in patients who had undergone NAC. CONCLUSION NAC significantly affects postoperative histopathological tumour stage in BRPC and appears to be a safe treatment option without increased perioperative complications, re-admission, in-hospital stay, or mortality. Further studies are mandatory to underline the suitability of NAC for ductal pancreatic adenocarcinoma subgroups in order to guide clinicians in their daily decision-making comprehensively.
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Affiliation(s)
- Lea Timmermann
- Department of Surgery, Charité University of Medicine Berlin, corporate member of University of Berlin and Berlin Institute of Health, Berlin, Germany
| | - Nathalie Rosumeck
- Department of Hematology, Oncology and Tumor Immunology, Charité University of Medicine Berlin, corporate member of University of Berlin and Berlin Institute of Health, Berlin, Germany
| | - Fritz Klein
- Department of Surgery, Charité University of Medicine Berlin, corporate member of University of Berlin and Berlin Institute of Health, Berlin, Germany
| | - Johann Pratschke
- Department of Surgery, Charité University of Medicine Berlin, corporate member of University of Berlin and Berlin Institute of Health, Berlin, Germany
| | - Uwe Pelzer
- Department of Hematology, Oncology and Tumor Immunology, Charité University of Medicine Berlin, corporate member of University of Berlin and Berlin Institute of Health, Berlin, Germany
| | - Marcus Bahra
- Department of Surgery, Charité University of Medicine Berlin, corporate member of University of Berlin and Berlin Institute of Health, Berlin, Germany
| | - Thomas Malinka
- Department of Surgery, Charité University of Medicine Berlin, corporate member of University of Berlin and Berlin Institute of Health, Berlin, Germany
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200
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Perochon A, Kahla A, Vranić M, Jia J, Malla KB, Craze M, Wallington E, Doohan FM. A wheat NAC interacts with an orphan protein and enhances resistance to Fusarium head blight disease. Plant Biotechnol J 2019; 17:1892-1904. [PMID: 30821405 PMCID: PMC6737021 DOI: 10.1111/pbi.13105] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 02/19/2019] [Accepted: 02/21/2019] [Indexed: 05/05/2023]
Abstract
Taxonomically-restricted orphan genes play an important role in environmental adaptation, as recently demonstrated by the fact that the Pooideae-specific orphan TaFROG (Triticum aestivum Fusarium Resistance Orphan Gene) enhanced wheat resistance to the economically devastating Fusarium head blight (FHB) disease. Like most orphan genes, little is known about the cellular function of the encoded protein TaFROG, other than it interacts with the central stress regulator TaSnRK1α. Here, we functionally characterized a wheat (T. aestivum) NAC-like transcription factor TaNACL-D1 that interacts with TaFROG and investigated its' role in FHB using studies to assess motif analyses, yeast transactivation, protein-protein interaction, gene expression and the disease response of wheat lines overexpressing TaNACL-D1. TaNACL-D1 is a Poaceae-divergent NAC transcription factor that encodes a Triticeae-specific protein C-terminal region with transcriptional activity and a nuclear localisation signal. The TaNACL-D1/TaFROG interaction was detected in yeast and confirmed in planta, within the nucleus. Analysis of multi-protein interactions indicated that TaFROG could form simultaneously distinct protein complexes with TaNACL-D1 and TaSnRK1α in planta. TaNACL-D1 and TaFROG are co-expressed as an early response to both the causal fungal agent of FHB, Fusarium graminearum and its virulence factor deoxynivalenol (DON). Wheat lines overexpressing TaNACL-D1 were more resistant to FHB disease than wild type plants. Thus, we conclude that the orphan protein TaFROG interacts with TaNACL-D1, a NAC transcription factor that forms part of the disease response evolved within the Triticeae.
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Affiliation(s)
- Alexandre Perochon
- UCD School of Biology and Environmental Science and Earth InstituteCollege of ScienceUniversity College DublinBelfield, Dublin 4Ireland
| | - Amal Kahla
- UCD School of Biology and Environmental Science and Earth InstituteCollege of ScienceUniversity College DublinBelfield, Dublin 4Ireland
| | - Monika Vranić
- UCD School of Biology and Environmental Science and Earth InstituteCollege of ScienceUniversity College DublinBelfield, Dublin 4Ireland
| | - Jianguang Jia
- UCD School of Biology and Environmental Science and Earth InstituteCollege of ScienceUniversity College DublinBelfield, Dublin 4Ireland
| | - Keshav B. Malla
- UCD School of Biology and Environmental Science and Earth InstituteCollege of ScienceUniversity College DublinBelfield, Dublin 4Ireland
| | | | | | - Fiona M. Doohan
- UCD School of Biology and Environmental Science and Earth InstituteCollege of ScienceUniversity College DublinBelfield, Dublin 4Ireland
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