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Xu L, He J, Meng Y, Zheng Y, Lu B, Zhang J, Zhou Y. Enhancing drought resistance in Pinus tabuliformis seedlings through root symbiotic fungi inoculation. FRONTIERS IN PLANT SCIENCE 2024; 15:1446437. [PMID: 39228833 PMCID: PMC11368727 DOI: 10.3389/fpls.2024.1446437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2024] [Accepted: 08/01/2024] [Indexed: 09/05/2024]
Abstract
Background Drought constitutes a major abiotic stress factor adversely affecting plant growth and productivity. Plant-microbe symbiotic associations have evolved regulatory mechanisms to adapt to environmental stress conditions. However, the interactive effects of different fungi on host growth and stress tolerance under drought conditions remain unclear. Objective This study explored the effects of varying polyethylene glycol (PEG-6000) concentrations (0%, 15%, 25%, and 35%) on the growth and physiological responses of two ectomycorrhizal fungi (Suillus granulatus (Sg) and Pisolithus tinctorius (Pt)) and two dark septate endophytes (Pleotrichocladium opacum (Po) and Pseudopyrenochaeta sp. (Ps)) isolated from the root system of Pinus tabuliformis. Specifically, the study aimed to evaluate six inoculation treatments, including no inoculation (CK), single inoculations with Sg, Pt, Po, Ps, and a mixed inoculation (Sg: Pt : Po: Ps = 1:1:1:1), on the growth and physiological characteristics of P. tabuliformis seedlings under different water regimes: well-watered at 70% ± 5%, light drought at 50% ± 5%, and severe drought at 30% ± 5% of the maximum field water holding capacity. Results All four fungi exhibited the capacity to cope with drought stress by enhancing antioxidant activities and regulating osmotic balance. Upon successful root colonization, they increased plant height, shoot biomass, root biomass, total biomass, and mycorrhizal growth response in P. tabuliformis seedlings. Under drought stress conditions, fungal inoculation improved seedling drought resistance by increasing superoxide dismutase and catalase activities, free proline and soluble protein contents, and promoting nitrogen and phosphorus uptake. Notably, mixed inoculation treatments significantly enhanced antioxidant capacity, osmotic adjustment, and nutrient acquisition abilities, leading to superior growth promotion effects under drought stress compared to single inoculation treatments. Conclusion All four fungi tolerated PEG-induced drought stress, with increased antioxidant enzyme activities and osmotic adjustment substances and they promoted the growth and enhanced drought resistance of P. tabuliformis seedlings.
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Affiliation(s)
- Lingjie Xu
- Country College of Landscape Architecture and Tourism, Hebei Agricultural University, Baoding, China
| | - Jiadong He
- Earth and Life Institute, Université catholique de Louvain-UCLouvain, Louvain-la-Neuve, Belgium
| | - Yu Meng
- Country College of Landscape Architecture and Tourism, Hebei Agricultural University, Baoding, China
| | - Yanyan Zheng
- Country College of Landscape Architecture and Tourism, Hebei Agricultural University, Baoding, China
| | - Bin Lu
- Country College of Landscape Architecture and Tourism, Hebei Agricultural University, Baoding, China
| | - Jiawen Zhang
- Country College of Landscape Architecture and Tourism, Hebei Agricultural University, Baoding, China
| | - Yong Zhou
- Country College of Landscape Architecture and Tourism, Hebei Agricultural University, Baoding, China
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Valenzuela-Molina F, Bura FI, Vázquez-Borrego MC, Granados-Rodríguez M, Rufián-Andujar B, Rufián-Peña S, Casado-Adam Á, Sánchez-Hidalgo JM, Rodríguez-Ortiz L, Ortega-Salas R, Martínez-López A, Michán C, Alhama J, Arjona-Sánchez Á, Romero-Ruiz A. Intraoperative oxygen tension and redox homeostasis in Pseudomyxoma peritonei: A short case series. Front Oncol 2023; 13:1076500. [PMID: 36776312 PMCID: PMC9909963 DOI: 10.3389/fonc.2023.1076500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 01/11/2023] [Indexed: 01/28/2023] Open
Abstract
Introduction Pseudomyxoma peritonei (PMP) is a rare malignant disease characterized by a massive multifocal accumulation of mucin within the peritoneal cavity. The current treatment option is based on complete cytoreductive surgery combined with hyperthermic intraperitoneal chemotherapy. However, the recurrence is frequent with subsequent progression and death. To date, most of the studies published in PMP are related to histological and genomic analyses. Thus, the need for further studies unveiling the underlying PMP molecular mechanisms is urgent. In this regard, hypoxia and oxidative stress have been extensively related to tumoral pathologies, although their contribution to PMP has not been elucidated. Methods In this manuscript, we have evaluated, for the first time, the intratumoral real-time oxygen microtension (pO2mt) in the tumor (soft and hard mucin) and surrounding healthy tissue from five PMP patients during surgery. In addition, we measured hypoxia (Hypoxia Inducible Factor-1a; HIF-1α) and oxidative stress (catalase; CAT) markers in soft and hard mucin from the same five PMP patient samples and in five control samples. Results The results showed low intratumoral oxygen levels, which were associated with increased HIF-1α protein levels, suggesting the presence of a hypoxic environment in these tumors. We also found a significant reduction in CAT activity levels in soft and hard mucin compared with healthy tissue samples. Discussion In conclusion, our study provides the first evidence of low intratumoral oxygen levels in PMP patients associated with hypoxia and oxidative stress markers. However, further investigation is required to understand the potential role of oxidative stress in PMP in order to find new therapeutic strategies.
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Affiliation(s)
- Francisca Valenzuela-Molina
- Surgical Oncology Unit, Department of Surgery, Reina Sofia University Hospital, Cordoba, Spain,GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
| | - Florina I. Bura
- GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
| | - Mari C. Vázquez-Borrego
- GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain,*Correspondence: Álvaro Arjona Sánchez, ; Mari C. Vázquez Borrego,
| | - Melissa Granados-Rodríguez
- GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
| | - Blanca Rufián-Andujar
- Surgical Oncology Unit, Department of Surgery, Reina Sofia University Hospital, Cordoba, Spain,GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
| | - Sebastián Rufián-Peña
- Surgical Oncology Unit, Department of Surgery, Reina Sofia University Hospital, Cordoba, Spain,GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
| | - Ángela Casado-Adam
- Surgical Oncology Unit, Department of Surgery, Reina Sofia University Hospital, Cordoba, Spain,GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
| | - Juan Manuel Sánchez-Hidalgo
- Surgical Oncology Unit, Department of Surgery, Reina Sofia University Hospital, Cordoba, Spain,GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
| | - Lidia Rodríguez-Ortiz
- Surgical Oncology Unit, Department of Surgery, Reina Sofia University Hospital, Cordoba, Spain,GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
| | - Rosa Ortega-Salas
- GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain,Pathology Unit, Reina Sofia University Hospital, Cordoba, Spain
| | - Ana Martínez-López
- GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain,Pathology Unit, Reina Sofia University Hospital, Cordoba, Spain
| | - Carmen Michán
- GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
| | - José Alhama
- GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
| | - Álvaro Arjona-Sánchez
- Surgical Oncology Unit, Department of Surgery, Reina Sofia University Hospital, Cordoba, Spain,GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain,*Correspondence: Álvaro Arjona Sánchez, ; Mari C. Vázquez Borrego,
| | - Antonio Romero-Ruiz
- GE09 Research in peritoneal and retroperitoneal oncological surgery, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
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PLA2G7/PAF-AH as Potential Negative Regulator of the Wnt Signaling Pathway Mediates Protective Effects in BRCA1 Mutant Breast Cancer. Int J Mol Sci 2023; 24:ijms24010882. [PMID: 36614323 PMCID: PMC9821466 DOI: 10.3390/ijms24010882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 12/23/2022] [Accepted: 12/29/2022] [Indexed: 01/05/2023] Open
Abstract
Past studies have confirmed that aberrant activation of the Wnt/β-catenin signaling is associated with tumorigenesis and metastasis in breast cancer, while the role of platelet-activating factor acetylhydrolase (PLA2G7/PAF-AH) in this signaling pathway remains unclear. In this study, we analyze the functional impact of PAF-AH on BRCA1 mutant breast cancer and explore its relationship to the Wnt signaling pathway. By performing immunohistochemistry, PAF-AH expression and β-catenin expression were examined in both BRCA1 WT and BRCA1 mutant breast cancer specimens. The BRCA1 mutant breast cancer cell line HCC1937 was used for in vitro experiments to assess the impact of PAF-AH on cellular functions. The intracellular distribution of β-catenin depending on PLA2G7/PAF-AH expression was investigated by immunocytochemistry. Significantly higher nuclear expression levels of PAF-AH were found in BRCA1 mutant tissue specimens than in BRCA1 WT samples. Cell viability, proliferation, and the motility rate of HCC1937 were significantly enhanced after PLA2G7 silencing, which indicated a protective role of PAF-AH in breast cancer. Nuclear PAF-AH expressed correlatedly with membranous β-catenin. PLA2G7 silencing provoked the β-catenin translocation from the membrane to the nucleus and activated Wnt signaling downstream genes. Our data showed a protective effect of high PAF-AH expression in BRCA1 mutant breast cancer. PAF-AH may achieve its protective effect by negatively regulating the Wnt pathway. In conclusion, our research sheds new light on the regulatory pathways in BRCA1 mutant breast cancer.
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Chen M, Qiao Y, Quan X, Shi H, Duan Z. Physiological, biochemical and phytohormone responses of Elymus nutans to α-pinene-induced allelopathy. PeerJ 2022; 10:e14100. [PMID: 36196396 PMCID: PMC9527024 DOI: 10.7717/peerj.14100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 09/01/2022] [Indexed: 01/21/2023] Open
Abstract
The α-pinene is the main allelochemical of many weeds that inhibit the growth of Elymus nutans, an important forage and ecological restoration herbage. However, the response changes of α-pinene-induced allelopathy to E. nutans is still unclear. Here, we investigated the physiological, biochemical and phytohormone changes of E. nutans exposed to different α-pinene concentrations. The α-pinene-stress had no significant effect on height and fresh weight (FW) of seedlings. The water-soluble proteins, the soluble sugars and proline (Pro) strengthened seedlings immunity at 5 and 10 µL L-1 α-pinene. Superoxide dismutase (SOD) and ascorbate peroxidase (APX) increased at 5 µL L-1 α-pinene to resist stress. APX reduced the membrane lipid peroxidation quickly at 10 µL L-1 α-pinene. The high-activity of peroxidase (POD), APX along with the high level of GSH contributed to the cellular redox equilibrium at 15 µL L-1 α-pinene. The POD, glutathione reductase (GR) activity and glutathione (GSH) level remained stable at 20 µL L-1 α-pinene. The changes in antioxidant enzymes and antioxidants indicated that E. nutans was effective in counteracting the harmful effects generated by hydrogen peroxide (H2O2). The α-pinene caused severe phytotoxic effects in E. nutans seedlings at 15 and 20 µL L-1. Endogenous signal nitric oxide (NO) and cell membrane damage product Pro accumulated in leaves of E. nutans seedlings at 15 and 20 µL L-1 α-pinene, while lipid peroxidation product malondialdehyde (MDA) accumulated. The chlorophylls (Chls), chlorophyll a (Chl a), chlorophyll b (Chl b) content decreased, and biomass of seedlings was severely inhibited at 20 µL L-1 α-pinene. The α-pinene caused phytotoxic effects on E. nutans seedlings mainly through breaking the balance of the membrane system rather than with reactive oxygen species (ROS) productionat 15 and 20 µL L-1 α-pinene. Additionally, phytohormone levels were altered by α-pinene-stress. Abscisic acid (ABA) and indole acetic acid (IAA) of E. nutans seedlings were sensitive to α-pinene. As for the degree of α-pinene stress, salicylic acid (SA) and jasmonic acid (JA) played an important role in resisting allelopathic effects at 15 µL L-1 α-pinene. The ABA, Zeatin, SA, gibberellin 7 (GA7), JA and IAA levels increased at 20 µL L-1 α-pinene. The α-pinene had a greatest impact on ABA and IAA levels. Collectively, our results suggest that E. nutans seedlings were effective in counteracting the harmful effects at 5 and 10 µL L-1 α-pinene, and they were severely stressed at 15 and 20 µL L-1 α-pinene. Our findings provided references for understanding the allelopathic mechanism about allelochemicals to plants.
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Affiliation(s)
- Mengci Chen
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
| | - Youming Qiao
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
| | - Xiaolong Quan
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
| | - Huilan Shi
- College of Ecol-Environmental Engineering, Qinghai University, Xining, Qinghai, China
| | - Zhonghua Duan
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
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Tang N, Fan P, Chen L, Yu X, Wang W, Wang W, Ouyang F. The Effect of Early Life Exposure to Triclosan on Thyroid Follicles and Hormone Levels in Zebrafish. Front Endocrinol (Lausanne) 2022; 13:850231. [PMID: 35721760 PMCID: PMC9203717 DOI: 10.3389/fendo.2022.850231] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 05/02/2022] [Indexed: 11/24/2022] Open
Abstract
Triclosan (TCS) is an antimicrobial chemical widely used in personal care products. Most of the TCS component is discharged and enters the aquatic ecosystem after usage. TCS has a similar structure as thyroid hormones that are synthesized by thyroid follicular epithelial cells, thus TCS has a potential endocrine disrupting effect. It is still not clear how the different levels of the environmental TCS would affect early development in vivo. This study examines the effects of TCS on thyroid hormone secretion and the early development of zebrafish. The fertilized zebrafish eggs were exposed to TCS at 0 (control), 3, 30, 100, 300, and 900 ng/mL, and the hatching rate and the larvae mortality were inspected within the first 14 days. The total triiodothyronine (TT3), total thyroxine (TT4), free triiodothyronine (FT3), and free thyroxine (FT4) were measured at 7, 14, and 120 days post-fertilization (dpf). The histopathological examinations of thyroid follicles were conducted at 120 dpf. TCS exposure at 30-300 ng/mL reduced the hatching rate of larvae to 34.5% to 28.2 % in the first 48 hours and 93.8 .7 % to 86.8 % at 72 h. Extremely high TCS exposure (900 ng/mL) strongly inhibited the hatching rate, and all the larvae died within 1 day. Exposure to TCS from 3 to 300 ng/mL reduced the thyroid hormones production. The mean TT3 and FT3 levels of zebrafish decreased in 300 ng/mL TCS at 14 dpf (300 ng/mL TCS vs. control : TT3 , 0.19 ± 0.08 vs. 0.39 ± 0.06; FT3, 19.21 ± 3.13 vs. 28.53 ± 1.98 pg/mg), and the FT4 decreased at 120 dpf ( 0.09 ± 0.04 vs. 0.20 ± 0.14 pg/mg). At 120 dpf , in the 300 ng/mL TCS exposure group, the nuclear area and the height of thyroid follicular epithelial cells became greater, and the follicle cell layer got thicker. This happened along with follicle hyperplasia, nuclear hypertrophy, and angiogenesis in the thyroid. Our study demonstrated that early life exposure to high TCS levels reduces the rate and speed of embryos hatching, and induces the histopathological change of thyroid follicle, and decreases the TT3, FT3, and FT4 production in zebrafish.
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Affiliation(s)
- Ning Tang
- Ministry of Education and Shanghai Key Laboratory of Children’s Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Pianpian Fan
- Ministry of Education and Shanghai Key Laboratory of Children’s Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Li Chen
- Guangxi Key Laboratory of Tumor Immunology and Microenvironmental Regulation, Guilin Medical University, Guilin, China
| | - Xiaogang Yu
- Ministry of Education and Shanghai Key Laboratory of Children’s Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wenjuan Wang
- Ministry of Education and Shanghai Key Laboratory of Children’s Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Weiye Wang
- Ministry of Education and Shanghai Key Laboratory of Children’s Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Fengxiu Ouyang
- Ministry of Education and Shanghai Key Laboratory of Children’s Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- *Correspondence: Fengxiu Ouyang, ;
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Wu Y, Zhang S, Song W, Liu J, Chen X, Hu G, Zhou Y, Liu L, Wu J. Enhanced Catalytic Efficiency of L‐amino Acid Deaminase Achieved by a Shorter Hydride Transfer Distance. ChemCatChem 2021. [DOI: 10.1002/cctc.202101067] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Yaoyun Wu
- School of Pharmaceutical Science Jiangnan University Wuxi 214122 P. R. China
- State Key Laboratory of Food Science and Technology Jiangnan University Wuxi 214122 P. R. China
| | - Sheng Zhang
- Tianrui Chemical Co. Ltd Department of Chemistry Quzhou 324400 P. R. China
| | - Wei Song
- School of Pharmaceutical Science Jiangnan University Wuxi 214122 P. R. China
- State Key Laboratory of Food Science and Technology Jiangnan University Wuxi 214122 P. R. China
| | - Jia Liu
- State Key Laboratory of Food Science and Technology Jiangnan University Wuxi 214122 P. R. China
| | - Xiulai Chen
- State Key Laboratory of Food Science and Technology Jiangnan University Wuxi 214122 P. R. China
| | - Guipeng Hu
- School of Pharmaceutical Science Jiangnan University Wuxi 214122 P. R. China
- State Key Laboratory of Food Science and Technology Jiangnan University Wuxi 214122 P. R. China
| | - Yiwen Zhou
- School of Pharmaceutical Science Jiangnan University Wuxi 214122 P. R. China
| | - Liming Liu
- State Key Laboratory of Food Science and Technology Jiangnan University Wuxi 214122 P. R. China
| | - Jing Wu
- School of Pharmaceutical Science Jiangnan University Wuxi 214122 P. R. China
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Tang SY, Wei H, Yu CY. Peptide-functionalized delivery vehicles for enhanced cancer therapy. Int J Pharm 2021; 593:120141. [DOI: 10.1016/j.ijpharm.2020.120141] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 11/17/2020] [Accepted: 11/28/2020] [Indexed: 02/08/2023]
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Rather SA, Sharma SC, Mahmood A. Antibodies generated against dextransucrase exhibit potential anticariostatic properties in Streptococcus mutans. Appl Microbiol Biotechnol 2020; 104:1761-1772. [PMID: 31900558 PMCID: PMC7223241 DOI: 10.1007/s00253-019-10327-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 12/11/2019] [Accepted: 12/18/2019] [Indexed: 12/20/2022]
Abstract
Streptococcus mutans is a common principal causative agent of dental caries. In this communication, we describe that the antibodies raised against purified dextransucrase effectively inhibited the growth of S. mutans. The purified enzyme showed 58-fold enrichment, 17.5% yield and a specific activity of 3.96 units/mg protein. Purified IgG fraction of the antibody showed significant affinity with the antigenic protein. Immunotritation of the enzyme with dextransucrase antibody showed a gradual increase in inhibition of dextransucrase activity. The growth of S. mutans was also inhibited by 85% in the presence of 28 μg of IgG fraction of the antibody. Antibodies also impaired glucosyltransferase activity (72.8%) and biofilm formation by 92.6% in S. mutans. Western blot analysis revealed no cross reactivity with the various tissues of mice, rat, rabbit and humans. Dot blot analysis showed little reactivity with Lactobacillus acidophilus and Staphylococcus aureus and there was no reactivity with other bacterial strains like Enterococcus faecalis, Escherichia coli and Salmonella typhimurium. These findings suggest that antibody raised against dextransucrase exhibit inhibitory effects on the growth of S. mutans and biofilm formation with no reactivity with various mammalian tissues, thus it could be an effective anticariogenic agent.
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Affiliation(s)
- Shabeer Ahmad Rather
- Department of Biochemistry, Panjab University, Sector 14, Chandigarh, 160014, India
| | | | - Akhtar Mahmood
- Department of Biochemistry, Panjab University, Sector 14, Chandigarh, 160014, India.
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Azevedo FF, Moreira GV, Teixeira CJ, Pessoa AFM, Alves MJ, Liberti EA, Carvalho CRO, Araújo EP, Saad MJA, Lima MHM. Topical Insulin Modulates Inflammatory and Proliferative Phases of Burn-Wound Healing in Diabetes-Induced Rats. Biol Res Nurs 2019; 21:473-484. [PMID: 31337227 DOI: 10.1177/1099800419864443] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The healing time of burn wounds depends on surface area and depth of the burn and associated comorbidities. Diabetes mellitus (DM) causes delays in the healing process by extending the inflammatory phase. Treatment with topical insulin can improve the inflammatory phase, restore metabolic dysregulation, and modulate impaired cellular signaling in burn wounds. The objective of this study was to evaluate markers of the inflammatory and proliferative phases of second-degree burns after topical insulin treatment in diabetic rats. Type I DM was induced with streptozotocin in male Wistar rats. The animals' backs were shaved and subjected to thermal burning. Rats were randomized into two groups: control diabetic (DC) and insulin diabetic (DI). At Days 7 and 14 postburn, rats were euthanized, and wound-tissue sections were evaluated by hematoxylin and eosin, Weigert, and Verhöeff staining, immunohistochemistry-paraffin, and enzyme-linked immunosorbent assay. A significant increase in reepithelialization was seen on Days 7 and 14 in DI versus DC rats. On Day 7, interleukin (IL)-1β, IL-6, monocyte chemotactic protein (MCP)-1, and F4/80 expression were increased in DI versus DC rats. On Day 14, MCP-1 expression was decreased and F4/80 increased in DI versus DC rats. On Days 7 and 14, Ki-67, transforming growth factor-β1, vascular endothelial growth factor expression, and formation of elastic fibers were increased in DI versus DC rats. Topical insulin modulates burn-wound healing in diabetic animals by balancing inflammation and promoting angiogenesis and formation of elastic fibers.
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Affiliation(s)
| | - Gabriela Virgínia Moreira
- 2 Department of Physiology and Biophysiology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Caio Jordão Teixeira
- 3 Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas, Campinas, Sao Paulo, Brazil
| | - Ana Flávia Marçal Pessoa
- 4 Department of Cell Biology and Development, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Michele Joana Alves
- 4 Department of Cell Biology and Development, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Edson Aparecido Liberti
- 5 Department of Anatomy, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | | | | | - Mário José Abdala Saad
- 6 Department of Internal Medicine, Faculty of Medical Sciences, State University of Campinas, Campinas, Sao Paulo, Brazil
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Xin Y, Wang D, Huang M, Yu J, Fang L, Xiao S. Proteome analysis of differential protein expression in porcine alveolar macrophages regulated by porcine reproductive and respiratory syndrome virus nsp1β protein. Virus Genes 2018; 54:385-396. [PMID: 29508239 DOI: 10.1007/s11262-018-1547-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 03/01/2018] [Indexed: 11/27/2022]
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV), an acute infectious disease agent in swine, causes enormous economic losses to the global swine industry. PRRSV nonstructural protein 1β (nsp1β) plays a critical role in viral subgenomic mRNA synthesis and host immune regulation. However, the global changes of cellular gene expression in natural target cells regulated by the nsp1β have not yet been identified. Here, isobaric tags for relative and absolute quantification (iTRAQ) labeling coupled with liquid chromatography-tandem mass spectrometry were used to quantitatively identify cellular proteins in porcine alveolar macrophage (PAM) 3D4/21 cells transduced with recombinant lentivirus expressing PRRSV nsp1β that are differentially expressed compared with PAM 3D4/21 cells transduced with recombinant lentivirus expressing GFP. Of the 425 cellular proteins detected as differentially expressed, 186 were upregulated and 239 were downregulated. Based on the identities of the differentially expressed cellular proteins and the essential role of nsp1β in interferon (IFN) activation and inflammatory factor antagonism during PRRSV infection, we propose a potential mechanism in which nsp1β inhibits IFN induction and nuclear factor κB (NF-κB) signaling pathways. Our results suggest that mitochondrial antiviral signaling (MAVS) protein and translocases of outer membrane complex 70 (TOM70), involved in type I IFN induction, were downregulated, while protein phosphatase 1A (PPM1A), related to the inhibition of NF-κB pathway activation, was upregulated in nsp1β-overexpressed PAM 3D4/21 cells. These data provide valuable information for better understanding the potential biological function of nsp1β during PRRSV infection and the mechanism of virus escape from host immune surveillance of viral replication.
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Affiliation(s)
- Yinghao Xin
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, People's Republic of China
| | - Dang Wang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, People's Republic of China
| | - Meijin Huang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, People's Republic of China
| | - Jinjin Yu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, People's Republic of China
| | - Liurong Fang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, People's Republic of China
| | - Shaobo Xiao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.
- The Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, People's Republic of China.
- Laboratory of Animal Virology, College of Veterinary Medicine, Huazhong Agricultural University, 1 Shi-zi-shan Street, Wuhan, 430070, Hubei, People's Republic of China.
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