1
|
Lian T, Guan R, Zhou BR, Bai Y. Structural mechanism of synergistic targeting of the CX3CR1 nucleosome by PU.1 and C/EBPα. Nat Struct Mol Biol 2024; 31:633-643. [PMID: 38267599 DOI: 10.1038/s41594-023-01189-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 11/23/2023] [Indexed: 01/26/2024]
Abstract
Pioneer transcription factors are vital for cell fate changes. PU.1 and C/EBPα work together to regulate hematopoietic stem cell differentiation. However, how they recognize in vivo nucleosomal DNA targets remains elusive. Here we report the structures of the nucleosome containing the mouse genomic CX3CR1 enhancer DNA and its complexes with PU.1 alone and with both PU.1 and the C/EBPα DNA binding domain. Our structures reveal that PU.1 binds the DNA motif at the exit linker, shifting 17 bp of DNA into the core region through interactions with H2A, unwrapping ~20 bp of nucleosomal DNA. C/EBPα binding, aided by PU.1's repositioning, unwraps ~25 bp of entry DNA. The PU.1 Q218H mutation, linked to acute myeloid leukemia, disrupts PU.1-H2A interactions. PU.1 and C/EBPα jointly displace linker histone H1 and open the H1-condensed nucleosome array. Our study unveils how two pioneer factors can work cooperatively to open closed chromatin by altering DNA positioning in the nucleosome.
Collapse
Affiliation(s)
- Tengfei Lian
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA.
| | - Ruifang Guan
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Bing-Rui Zhou
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Yawen Bai
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA.
| |
Collapse
|
2
|
Ding Y, Shi Y, Guan R, Yan S, Liu H, Wang Z, Li J, Wang T, Cai W, Ma G. Evaluation and comparison of efficacy and safety of tirzepatide and semaglutide in patients with type 2 diabetes mellitus: A Bayesian network meta-analysis. Pharmacol Res 2024; 199:107031. [PMID: 38061595 DOI: 10.1016/j.phrs.2023.107031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 12/03/2023] [Accepted: 12/04/2023] [Indexed: 12/17/2023]
Abstract
BACKGROUND As new antidiabetic drugs, tirzepatide (Tir) and semaglutide (Sem) are progressively applied in clinical practice. However, their efficacy and safety profiles have not been comprehensively assessed. Therefore, a Bayesian network meta-analysis was used to evaluate and compare the efficacy and safety of Tir and Sem in treating type 2 diabetes mellitus (T2DM). METHODS PubMed, EMBASE, Web of Science, Cochrane Library and ClinicalTrials.gov were systematically searched from inception to April 3rd, 2023. Randomized clinical trials (RCTs) comparing the efficacy and safety of Tir and Sem with placebo or the other antidiabetic drugs in treating T2DM were included. The efficacy outcomes included changes in glycated hemoglobin (HbA1c), body weight (BW), body mass index (BMI), and the proportion of participants with HbA1c< 7 %. The safety outcome was the proportion of participants experiencing gastrointestinal adverse events (GIAEs). RESULTS A total of 38 studies involving 34,166 participants were included. Compared to 1 mg of subcutaneous Sem (Sem SC), 5 mg, 10 mg and 15 mg of Tir demonstrated superior efficacy in reducing HbA1c (mean difference (MD), [95 % CI], -0.22 [-0.40, -0.03] %, -0.42 [-0.60, -0.24] % and -0.53 [-0.71, -0.35] %, respectively) and BW (MD [95 % CI], -1.48 [-2.53, -0.43] kg, -4.00 [-5.05, -2.95] kg and -5.71 [-6.73, -4.68] kg, respectively). Conversely, 7 mg and 14 mg of oral Sem (Sem PO) displayed inferior efficacy in reducing HbA1c (MD [95 % CI], 0.47 [0.26, 0.68] % and 0.35 [0.16, 0.54] %, respectively) and BW (MD [95 % CI], 2.36 [1.24, 3.48] kg and 1.11 [0.10, 2.13] kg). However, 20 mg and 40 mg of Sem PO were non-inferior in reducing HbA1c (MD [95 % CI], 0.13 [-0.29, 0.55] % and 0.01 [-0.38, 0.40] %, respectively) and BW (MD [95 % CI], -0.41 [-2.71, 1.90] kg and -1.32 [-3.58, 0.92] kg). In terms of safety, compared to 1 mg of Sem SC, 5 mg, 10 mg and 15 mg of Tir did not significantly increase the incidence of GIAEs (odd ratio (OR) [95 % CI], 0.70 [0.42, 1.10], 0.87 [0.52, 1.36] and 0.99 [0.60, 1.54], respectively), while 7 mg of Sem PO showed a lower incidence of GIAEs (OR [95 % CI], 0.48 [0.25, 0.83]). Compared to insulin, 0.5 mg of Sem SC, 1 mg of Sem SC, 5 mg of Tir, 10 mg of Tir and 15 mg of Tir displayed better efficacy in lowering HbA1c (MD [95 % CI], -0.40 [-0.63, -0.18] %, -0.69 [-0.90, -0.48] %, -0.91 [-1.10, -0.72] %, -1.11 [-1.30, -0.92] % and -1.22 [-1.41, -1.03] %, respectively) and BW (MD [95 % CI], -5.34[-6.60, -4.09] kg, -6.70 [-7.90,-5.51] kg, -8.18 [-9.27, -7.10] kg, -10.70 [-11.79, -9.61] kg and -12.41 [-13.49,-11.33] kg, respectively). According to the surface under the cumulative ranking curve (SUCRA) value, among all the included interventions, 15 mg of Tir exhibited the most potent effect in reducing HbA1c (99.81 %) and BW (99.98 %), followed by 10 mg of Tir (96.83 % and 95.72 %), 5 mg of Tir (92.88 % and 86.04 %), 1 mg of Sem SC (85.85 % and 74.97 %), 40 mg of Sem PO (83.66 % and 84.31 %), 20 mg of Sem PO (76.98 % and 77.12 %), 300 mg of Can (49.93 % and 60.89 %), insulin (36.38 % and 0.22 %) and 100 mg of Sit (12.28 % and 18.51 %) respectively. Meanwhile, 5 mg, 10 mg, and 15 mg of Tir (48.32 %, 30.96 %, and 21.07 %, respectively), 0.5 mg and 1 mg of Sem SC (33.54 % and 24.77 %, respectively) significantly increased the incidence of GIAEs. CONCLUSION Both Tir and Sem demonstrated favorable antidiabetic effects and were particularly suitable for T2DM patients who were obese or overweight. Despite a high incidence of GIAEs, their safety profile was deemed acceptable. Tir was the best option among all the included interventions.
Collapse
Affiliation(s)
- Yanan Ding
- School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Yufei Shi
- School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Ruifang Guan
- School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Shiwei Yan
- School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Haiyang Liu
- School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Zihan Wang
- School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Jiyifan Li
- School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Tiandian Wang
- School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Weimin Cai
- School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Guo Ma
- School of Pharmacy, Fudan University, Shanghai 201203, PR China.
| |
Collapse
|
3
|
Zhu M, Guan R, Ma G. Efficacy and safety of teneligliptin in patients with type 2 diabetes mellitus: a Bayesian network meta-analysis. Front Endocrinol (Lausanne) 2023; 14:1282584. [PMID: 38189048 PMCID: PMC10766708 DOI: 10.3389/fendo.2023.1282584] [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] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 11/09/2023] [Indexed: 01/09/2024] Open
Abstract
Background As a popular antidiabetic drug, teneligliptin has been used for over 10 years, but its efficacy and safety have rarely been systematically evaluated. Therefore, a Bayesian network meta-analysis was conducted to evaluate the efficacy and safety of teneligliptin in patients with type 2 diabetes mellitus (T2DM). Methods We systematically searched PubMed, Web of Science, Embase, Cochrane Central Register of Controlled Trials, and ClinicalTrials.gov. Randomized controlled trials (RCTs) comparing teneligliptin with placebo or active comparators in T2DM patients for at least 12 weeks were included in the study. Data analysis was performed using R 4.2.3 and Stata 17.0 software. Each outcome was presented as a mean difference (MD) or an odds ratio (OR) along with 95% confidence interval (CI) and the surface under the cumulative ranking curve value (SUCRA). Results A total of 18 RCTs with 3,290 participants with T2DM were included in this study. Generally, compared to placebo, sitagliptin, vildagliptin, metformin, and bromocriptine, 20 mg of teneligliptin showed better efficacy in reducing HbA1c (MD [95% CI], -0.78 [-0.86 to -0.70], -0.08 [-0.36 to 0.19], -0.04 [-0.72 to 0.60], -0.12 [-0.65 to 0.42], and -0.50 [-0.74 to -0.26], respectively) and fasting plasma glucose (FPG) (MD [95% CI], -18.02 [-20.64 to -15.13], 1.17 [-9.39 to 11.70], -8.06 [-30.95 to 14.35], -2.75 [-18.89 to 13.01], and -34.23 [-45.93 to -22.96], respectively), and 40 mg of teneligliptin also showed better efficacy in reducing HbA1c (MD [95% CI], -0.84 [-1.03 to -0.65], -0.15 [-0.49 to 0.19], -0.10 [-0.81 to 0.57], -0.18 [-0.76 to 0.39], and -0.56 [-0.88 to -0.26], respectively) and FPG (MD [95% CI], -20.40 [-26.07 to -14.57], -1.20 [-13.21 to 10.38], -10.43 [-34.16 to 12.65], -5.13 [-22.21 to 11.66], and -36.61 [-49.33 to -24.01], respectively). Compared to placebo, 20 mg of teneligliptin showed no significant difference in incidences of hypoglycemia and gastrointestinal adverse events (OR [95% CI], 1.30 [0.70 to 2.19] and 1.48 [0.78 to 2.98], respectively), and 40 mg of teneligliptin showed no significant difference in incidence of hypoglycemia (OR [95% CI], 2.63 [0.46 to 8.10]). Generally, antidiabetic effect and hypoglycemia risk of teneligliptin gradually increased as its dose increased from 5 mg to 40 mg. Compared to 20 mg of teneligliptin, 40 mg of teneligliptin showed superior efficacy and no-inferior safety, which was considered as the best option in reducing HbA1c, FPG, and 2h PPG and increasing proportion of the patients achieving HbA1c < 7% (SUCRA, 85.51%, 84.24%, 79.06%, and 85.81%, respectively) among all the included interventions. Conclusion Compared to sitagliptin, vildagliptin, metformin, bromocriptine, and placebo, teneligliptin displayed favorable efficacy and acceptable safety in treating T2DM. Twenty milligrams or 40 mg per day was the optimal dosage regimen of teneligliptin. The results of this study will provide important evidence-based basis for rational use of teneligliptin and clinical decision-making of T2DM medication.
Collapse
Affiliation(s)
| | | | - Guo Ma
- Department of Clinical Pharmacy, School of Pharmacy, Fudan University, Shanghai, China
| |
Collapse
|
4
|
Li J, Zhu C, Liang J, Hu J, Liu H, Wang Z, Guan R, Chow J, Yan S, Li L, Ma F, Ma G. Cardiovascular benefits and safety of sotagliflozin in type 2 diabetes mellitus patients with heart failure or cardiovascular risk factors: a bayesian network meta-analysis. Front Pharmacol 2023; 14:1303694. [PMID: 38044937 PMCID: PMC10691547 DOI: 10.3389/fphar.2023.1303694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 11/06/2023] [Indexed: 12/05/2023] Open
Abstract
Background: As an antidiabetic agent, sotagliflozin was recently approved for heart failure (HF). However, its cardiovascular benefits in type 2 diabetic mellitus (T2DM) patients with HF or cardiovascular (CV) risk factors have not been systematically evaluated. The aim of this study is to evaluate the cardiovascular benefits and safety of sotagliflozin in T2DM patients with HF or CV risk factors using Bayesian network meta-analysis. Methods: Data were retrieved from PubMed, Embase, Web of Science, ClinicalTrials.gov, and Cochrane Library from their inception to 16 August 2023. Randomized controlled trials (RCTs) comparing sotagliflozin with a placebo, dapagliflozin, and empagliflozin in adult T2DM patients with HF or CV risks for at least 12 weeks were included in the study. Data analysis was conducted using R 4.2.3 and Stata 17.0. Cardiovascular efficacy outcomes included HF events (hospitalization or urgent visits for HF), MACE (deaths from CV causes, hospitalizations for HF, nonfatal myocardial infarctions, and strokes), cardiovascular death, the decrease in SBP, and weight loss. Safety outcomes are urinary tract infection, diarrhea, and diabetic ketoacidosis. Results: Eleven studies with 30,952 patients were included. Compared to dapagliflozin and empagliflozin, 200 mg of sotagliflozin showed the best effect in reducing HF events [OR (95% CI), 0.79 (0.66, 0.94) and 0.90 (0.63, 1.27)]. Compared to dapagliflozin, 200 mg of sotagliflozin [OR (95% CI), 0.76 (0.66, 0.87)] was superior in preventing MACE. Compared to empagliflozin, 200 mg of sotagliflozin [OR (95% CI), 1.46 (1.04, 2.05)] was inferior in preventing CV death. Sotagliflozin showed a poorer SBP decreasing effect than empagliflozin and dapagliflozin [MD (95% CI), 1.30 (0.03, 2.56) and 2.25 (0.35, 4.14), respectively]. There was no significant difference between sotagliflozin and other interventions in weight loss. Sotagliflozin exhibited no increased risk for diabetic ketoacidosis or urinary tract infection among all interventions, however, it showed a mild risk for diarrhea than placebo [OR (95% CI), 1.47 (1.28, 1.69)]. Conclusion: Sotagliflozin displayed moderate CV benefits and acceptable safety. Sotagliflozin can be one of the recommended options for T2DM patients with HF or CV risk factors, which will be important for evidence-based use of sotagliflozin as well as decision-making of T2DM medication.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Guo Ma
- Department of Clinical Pharmacy, School of Pharmacy, Fudan University, Shanghai, China
| |
Collapse
|
5
|
Lian T, Guan R, Zhou BR, Bai Y. The human LIN28B nucleosome is inherently pre-positioned for efficient binding of multiple OCT4s without H3 K27 acetylation. bioRxiv 2023:2023.10.06.559923. [PMID: 37986743 PMCID: PMC10659430 DOI: 10.1101/2023.10.06.559923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Pioneer transcription factors possess the unique ability to access DNA within tightly packed chromatin structures, playing pivotal roles in cell differentiation and reprogramming. However, their precise mechanism for recognizing nucleosomes has remained mystery. Recent structural and biochemical investigations into the binding interactions between the human pioneer factor OCT4 and the LIN28B nucleosome by Sinha et al.1 and Guan et al.2 have yielded conflicting results regarding nucleosome positioning, nucleosomal DNA unwrapping, binding cooperativity, and the role of N-terminal tail of OCT4. In this study, we undertook a comparative analysis of these two research efforts and delved into the factors contributing to the observed discrepancies. Our investigation unveiled that the utilization of human and Xenopus laevis core histones, along with a discrete two-step salt dialysis method, led to distinct positioning of DNA within reconstituted LIN28B nucleosomes. Additionally, our reanalysis of the electrophoretic mobility shift assay data showed that H3 K27 acetylation did not increase OCT4 binding to the internal sites of the nucleosome when normalized to input; instead, it promoted sample aggregation. Thus, the available experimental data support the notion that the human LIN28B nucleosome is pre-positioned for efficient binding with multiple OCT4s, and there is no compelling evidence for its regulation by histone modifications.
Collapse
Affiliation(s)
- Tengfei Lian
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ruifang Guan
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Bing-Rui Zhou
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Yawen Bai
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| |
Collapse
|
6
|
Gao Y, Fu X, Hu H, Li T, Yuan L, Zhang J, Wu Y, Wang M, Ke Y, Li X, Hu F, Zhang M, Sun L, Wen H, Guan R, Gao P, Chai W, Zhao Y, Hu D. Impact of shift work on dementia: a systematic review and dose-response meta-analysis. Public Health 2023; 223:80-86. [PMID: 37625271 DOI: 10.1016/j.puhe.2023.07.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/26/2023] [Accepted: 07/21/2023] [Indexed: 08/27/2023]
Abstract
OBJECTIVES Although shift work has been reported as having a link to dementia, evidence remains inconsistent, and a comprehensive dose-response meta-analysis of the association is still lacking. We therefore conducted this meta-analysis to explore the association between shift work and the risk of dementia. STUDY DESIGN Systematic review and dose-response meta-analysis. METHODS PubMed, Embase, and Web of Science databases were systematically searched. Fixed or random-effects models were used to estimate the summary relative risks (RRs) and 95% confidence intervals (95% CIs). Generalized least squares regression was used to estimate dose-response associations, and restricted cubic splines were used to examine possible linear or non-linear associations. RESULTS Five articles (10 studies) with 72,999 participants and 23,067 cases were eventually included in the meta-analysis. The summary RRs and 95% CIs of dementia risk with shift work and night shift work versus daytime work were 1.13 (95% CI: 1.05-1.21, I2 = 46.70%) and 1.13 (95% CI: 1.03-1.24, I2 = 9.20%), respectively. The risk of dementia increased by 1% (RR = 1.01, 95% CI: 1.01-1.02, I2 = 41.3%) with each 1-year increase in the duration of shift work. We found a non-linear dose-response association between the duration of shift work and the risk of dementia (Pnon-linearity = 0.006). Though the shape of the curve was steeper with the duration of shift work <7 years, the increase was more gradual after 7 years. CONCLUSION Our findings suggest that shift work may be a risk factor for future dementia and that controlling the length of shift work is a feasible measure that may contribute to prevent dementia.
Collapse
Affiliation(s)
- Y Gao
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - X Fu
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - H Hu
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - T Li
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - L Yuan
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - J Zhang
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - Y Wu
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - M Wang
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - Y Ke
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - X Li
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - F Hu
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Medical School, Shenzhen, Guangdong, 518060, People's Republic of China
| | - M Zhang
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Medical School, Shenzhen, Guangdong, 518060, People's Republic of China
| | - L Sun
- Department of Social Medicine and Health Management, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - H Wen
- Department of Clinical Medicine, Zhengzhou Shuqing Medical College, 6 Gongming Road, Erqi District, Zhengzhou, Henan, 450064, People's Republic of China
| | - R Guan
- Department of Famarcy, Shenzhen University General Hospital, Shenzhen, Guangdong, 518055, People's Republic of China
| | - P Gao
- Department of Neurology, Shenzhen University General Hospital, Shenzhen, Guangdong, 518055, People's Republic of China
| | - W Chai
- Department of Neurology, Shenzhen University General Hospital, Shenzhen, Guangdong, 518055, People's Republic of China
| | - Y Zhao
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - D Hu
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| |
Collapse
|
7
|
Lian T, Guan R, Zhou BR, Bai Y. Structural mechanism of synergistic targeting of the CX3CR1 nucleosome by PU.1 and C/EBPα. bioRxiv 2023:2023.08.25.554718. [PMID: 37790476 PMCID: PMC10542146 DOI: 10.1101/2023.08.25.554718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Pioneer transcription factors are vital for cell fate changes. PU.1 and C/EBPα work together to regulate hematopoietic stem cell differentiation. However, how they recognize in vivo nucleosomal DNA targets remain elusive. Here we report the structures of the nucleosome containing the mouse genomic CX3CR1 enhancer DNA and its complexes with PU.1 alone and with both PU.1 and the C/EBPα DNA binding domain. Our structures reveal that PU.1 binds the DNA motif at the exit linker, shifting 17 bp of DNA into the core region through interactions with H2A, unwrapping ~20 bp of nucleosomal DNA. C/EBPα binding, aided by PU.1's repositioning, unwraps ~25 bp entry DNA. The PU.1 Q218H mutation, linked to acute myeloid leukemia, disrupts PU.1-H2A interactions. PU.1 and C/EBPα jointly displace linker histone H1 and open the H1-condensed nucleosome array. Our study unveils how two pioneer factors can work cooperatively to open closed chromatin by altering DNA positioning in the nucleosome.
Collapse
Affiliation(s)
- Tengfei Lian
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
- These authors equally contributed to this work
| | - Ruifang Guan
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
- These authors equally contributed to this work
| | - Bing-Rui Zhou
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Yawen Bai
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| |
Collapse
|
8
|
Guan R, Lian T, Zhou BR, Wheeler D, Bai Y. Structural mechanism of LIN28B nucleosome targeting by OCT4. Mol Cell 2023; 83:1970-1982.e6. [PMID: 37327775 DOI: 10.1016/j.molcel.2023.05.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 03/31/2023] [Accepted: 05/19/2023] [Indexed: 06/18/2023]
Abstract
Pioneer transcription factors are essential for cell fate changes by targeting closed chromatin. OCT4 is a crucial pioneer factor that can induce cell reprogramming. However, the structural basis of how pioneer factors recognize the in vivo nucleosomal DNA targets is unknown. Here, we determine the high-resolution structures of the nucleosome containing human LIN28B DNA and its complexes with the OCT4 DNA binding region. Three OCT4s bind the pre-positioned nucleosome by recognizing non-canonical DNA sequences. Two use their POUS domains while the other uses the POUS-loop-POUHD region; POUHD serves as a wedge to unwrap ∼25 base pair DNA. Our analysis of previous genomic data and determination of the ESRRB-nucleosome-OCT4 structure confirmed the generality of these structural features. Moreover, biochemical studies suggest that multiple OCT4s cooperatively open the H1-condensed nucleosome array containing the LIN28B nucleosome. Thus, our study suggests a mechanism of how OCT4 can target the nucleosome and open closed chromatin.
Collapse
Affiliation(s)
- Ruifang Guan
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Tengfei Lian
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Bing-Rui Zhou
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - David Wheeler
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Yawen Bai
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
| |
Collapse
|
9
|
Li J, Du N, Guan R, Zhao S. Construction of a Chiral Fluorescent Probe for Tryptophan Enantiomers/Ascorbic Acid Identification. ACS Appl Mater Interfaces 2023; 15:23642-23652. [PMID: 37134180 DOI: 10.1021/acsami.3c02423] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Chiral recognition of amino acid enantiomers is critical in enhancing drug efficacy, detecting disease markers, and understanding physiological processes. Enantioselective fluorescent identification has gained attention among researchers due to its nontoxicity, easy synthesis, and biocompatibility. In this work, chiral fluorescent carbon dots (CCDs) were produced through a hydrothermal reaction followed by chiral modification. The fluorescent probe, Fe3+-CCDs (F-CCDs), was constructed by complexing Fe3+ with CCDs to differentiate between the enantiomers of tryptophan (Trp) and determine ascorbic acid (AA) through an "on-off-on" response. It is worth noting that l-Trp can greatly enhance the fluorescence of F-CCDs with a blue shift, whereas d-Trp does not have any effect on the fluorescence of F-CCDs. F-CCDs showed a low limit of detection (LOD) for l-Trp and l-AA, with an LOD of 3.98 and 6.28 μM, respectively. The chiral recognition mechanism of tryptophan enantiomers using F-CCDs was proposed based on the interaction force between the enantiomers and F-CCDs, as confirmed by UV-vis absorption spectroscopy and density functional theory calculations. The determination of l-AA by F-CCDs was also confirmed through the binding of l-AA to Fe3+ to release CCDs, as seen in UV-vis absorption spectra and time-resolved fluorescence decays. In addition, AND and OR gates were constructed based on the different responses of CCDs to Fe3+ and Fe3+-CCDs to l-Trp/d-Trp, demonstrating the significance of molecular-level logic gates in drug detection and clinical diagnosis.
Collapse
Affiliation(s)
- Jinqiu Li
- School of Materials Science & Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Ning Du
- School of Materials Science & Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Ruifang Guan
- School of Materials Science & Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Songfang Zhao
- School of Materials Science & Engineering, University of Jinan, Jinan, Shandong 250022, China
| |
Collapse
|
10
|
Li N, Dong X, Lv X, Li Y, Ma Q, Guan R, Xie Z. Liquid and solid-state tunable fluorescent carbon dots for trace water detection. Chem Commun (Camb) 2023; 59:4475-4478. [PMID: 36960801 DOI: 10.1039/d2cc06736f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
We synthesized a type of sulfur and nitrogen co-doped carbon dot, which can achieve tunable fluorescence both in solutions and solid matrices, that is dominated by the surface state. Moreover, it can be used to detect trace water in a variety of organic solvents, especially in acetone with a limit of detection as low as 0.042%.
Collapse
Affiliation(s)
- Nan Li
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China.
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Xuezhe Dong
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China.
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Xugui Lv
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China.
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Yunfei Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Qingyu Ma
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China.
| | - Ruifang Guan
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China.
| | - Zheng Xie
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| |
Collapse
|
11
|
Yang Q, Wu X, Pan Z, Guan R, Yang P, Liu Y, Yang X, Du W, Liang J, Hu J, Cai W, Ma G. Integration of pharmacodynamics, network pharmacology and metabolomics to elucidate effect and mechanism of Artemisia capillaris Thunb. in the treatment of jaundice. J Ethnopharmacol 2023; 303:115943. [PMID: 36414211 DOI: 10.1016/j.jep.2022.115943] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 11/10/2022] [Accepted: 11/11/2022] [Indexed: 06/16/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE As one of the most commonly used herbs, Artemisia capillaris Thunb. (ACT) display favorable effect in the treatment of jaundice. However, mechanism of ACT in the treatment of jaundice remains unclear at present, which limits its development and application. AIM OF THE STUDY To investigate effect and mechanism of Artemisia capillaris Thunb. (ACT) in the treatment of jaundice using pharmacodynamics, network pharmacology and metabolomics. METHODS Effect of ACT in treating jaundice was evaluated by biochemical assays and pathological observation using the α-naphthyl isothiocyanate (ANIT)-induced mice. Jaundice-relieving mechanism of ACT was investigated by integration of network pharmacology and metabolomics. RESULTS After the mice with jaundice were administrated ACT extract for 9 days, compared to that of the model group, serum D-BIL, T-BIL and ALP levels of the mice in the low, medium, high dose of ACT group decreased by 39.81%, 15.30% and 16.92%; 48.06%, 42.54% and 36.91%; 26.90%, 12.34% and 16.90%, respectively. The pathologic study indicated that ACT improved the symptoms of liver injury of the mice with jaundice. The network of herb (i.e., ACT)-components-targets-disease (i.e., jaundice) was established, which consisted of 17 components classified in flavonoids, chromones, organic acids, terpenoids, and 234 targets related to treatment of jaundice. Metabolomics analysis showed that, compared to that in the model group, level of 8 differential metabolites were upregulated and level of 29 differential metabolites were downregulated in the mice liver in the ACT group, respectively. The main metabolic pathways involved in treatment of jaundice by ACT were pantothenate and CoA biosynthesis, glutathione metabolism, biosynthesis of unsaturated fatty acids, primary bile acid biosynthesis in the liver, respectively. The integrated analysis of network pharmacology and metabolomics showed that 3α,7α,12α a-Trihydroxy-5β-cholanate, glycocholate, taurocholate, pantetheine 4'-phosphate, and d-4'-phosphopantothenate were the potential biomarkers for treatment of jaundice, and AKR1C4, ALDH2 and HSD11B were the potential drug targets in the treatment of jaundice by ACT. CONCLUSION The study based on metabolomics and network pharmacology indicated that ACT can display favorable jaundice-relieving effect by its multiple components regulating multiple biomarkers, multiple targets and multiple pathways, and may be a rational therapy for the treatment of jaundice.
Collapse
Affiliation(s)
- Qing Yang
- School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Xubo Wu
- Department of Surgery, Minhang Hospital, Fudan University, Shanghai, 201199, PR China
| | - Zhiyu Pan
- Department of Surgery, Minhang Hospital, Fudan University, Shanghai, 201199, PR China
| | - Ruifang Guan
- School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Ping Yang
- School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Ye Liu
- School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Xiaolei Yang
- School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Wandi Du
- School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Jingru Liang
- School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Jiarong Hu
- School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Weimin Cai
- School of Pharmacy, Fudan University, Shanghai, 201203, PR China
| | - Guo Ma
- School of Pharmacy, Fudan University, Shanghai, 201203, PR China.
| |
Collapse
|
12
|
Guan R, Lian T, Zhou BR, Bai Y. Structural mechanism of LIN28B nucleosome targeting by OCT4 for pluripotency. bioRxiv 2023:2023.01.03.522631. [PMID: 36789416 PMCID: PMC9928048 DOI: 10.1101/2023.01.03.522631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Pioneer transcription factors are essential for cell fate changes by targeting closed chromatin. OCT4 is a crucial pioneer factor that can induce cell reprogramming. However, the structural basis of how pioneer factors recognize the in vivo nucleosomal DNA targets is unknown. Here, we determine the high-resolution structures of the nucleosome containing human LIN28B DNA and its complexes with the OCT4 DNA binding region. Three OCT4s bind the pre-positioned nucleosome by recognizing non-canonical DNA motifs. Two use their POUS domains by forming extensive hydrogen bonds. The other uses the POUS-loop-POUHD region; POUHD serves as a wedge to unwrap ∼25 base pair DNA. Biochemical studies suggest that multiple OCT4s cooperatively open the H1-condensed nucleosome array containing the LIN28B nucleosome. Our study suggests a mechanism whereby OCT4s target the LIN28B nucleosome by forming multivalent interactions with nucleosomal motifs, unwrapping nucleosomal DNA, evicting H1, and cooperatively open closed chromatin to initiate cell reprogramming.
Collapse
Affiliation(s)
- Ruifang Guan
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.,These authors equally contributed to this work
| | - Tengfei Lian
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.,These authors equally contributed to this work
| | - Bing-Rui Zhou
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892
| | - Yawen Bai
- Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.,Correspondence:
| |
Collapse
|
13
|
Tang L, Li P, Han Y, Yang G, Xin H, Zhao S, Guan R, Liu Z, Cao D. A fluorescein-based fluorescent probe for real-time monitoring hypochlorite. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
14
|
Zhang H, Cao D, Cheng X, Guan R, Zhou C. Amide salt pyrolysis fabrication of graphene nanosheets with multi-excitation single color emission. J Colloid Interface Sci 2022; 627:671-680. [PMID: 35878459 DOI: 10.1016/j.jcis.2022.07.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 04/17/2022] [Revised: 06/26/2022] [Accepted: 07/01/2022] [Indexed: 01/31/2023]
Abstract
A novel and simple approach of using amide salt pyrolysis to produce photoluminescent (multi-excitation and single color emission) graphene nanosheets (GNs) with a thickness of <1 nm and a diameter of about 100-200 nm is described herein. It has characteristics of high water solubility, low toxicity, easy manufacturing, etc., and has potential application prospects in analytical chemistry and biomedicine.
Collapse
Affiliation(s)
- Hao Zhang
- Research Institute of Polymer Materials, School of Materials Science and Engineering, Shandong University, Jinan 250061, China
| | - Duxia Cao
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Xiao Cheng
- Research Institute of Polymer Materials, School of Materials Science and Engineering, Shandong University, Jinan 250061, China.
| | - Ruifang Guan
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China.
| | - Chuanjian Zhou
- Research Institute of Polymer Materials, School of Materials Science and Engineering, Shandong University, Jinan 250061, China.
| |
Collapse
|
15
|
Du N, Zhang H, Wang J, Dong X, Li J, Wang K, Guan R. Fluorescent silicon nanoparticle–based quantitative hemin assay. Anal Bioanal Chem 2022; 414:8223-8232. [DOI: 10.1007/s00216-022-04386-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/10/2022] [Accepted: 10/13/2022] [Indexed: 11/01/2022]
|
16
|
Guan R, Yang Q, Yang X, Du W, Li X, Ma G. Efficacy and safety of tirzepatide in patients with type 2 diabetes mellitus: A bayesian network meta-analysis. Front Pharmacol 2022; 13:998816. [PMID: 36313305 PMCID: PMC9613929 DOI: 10.3389/fphar.2022.998816] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 09/28/2022] [Indexed: 11/29/2022] Open
Abstract
Background: In light of clinical trials comparing different doses of tirzepatide with selective glucagon-like peptide-1 receptor agonist (GLP1-RA) or insulin analogue, a bayesian network meta-analysis was conducted to investigate the efficacy and safety of tirzepatide in patients with type 2 diabetes mellitus (T2DM). Methods: We systematically searched PubMed, Embase, Web of science, Cochrane Central Register of Controlled Trials, and ClinicalTrials.gov from their inception to 2 May 2022. Final included studies met the eligibility criteria and methodological quality recommendations. Data analysis was performed using Stata 15.1 software. Each outcome was presented as a mean difference or an odds ratio, and the surface under the cumulative ranking curve value (SCURA). Results: Ultimately, eight eligible RCTs involving 7245 patients were included. Generally speaking, compared with basal insulin (glargine or degludec); selective GLP1-RA (dulaglutide or semaglutide once weekly), 10 and 15 mg of tirzepatide exhibited better antidiabetic and weight-loss effect, especially, 15 mg of tirzepatide was dominant on reducing glycated hemoglobin (SCURA probability: 93.5%), body weight (99.7%), and fasting serum glucose (86.6%). As for safety, insulin caused less gastrointestinal events (93.5%), and there was no statistical difference between GLP1-RA and tirzepatide. Conclusion: Compare with insulin and GLP1-RA, tirzepatide display favorable efficacy and acceptable safety for T2DM patients. More well-designed RCTs are needed to evaluate its clinical performance with higher doses of GLP1-RA and determine its potential cardiovascular benefits.
Collapse
Affiliation(s)
- Ruifang Guan
- Department of Clinical Pharmacy, School of Pharmacy, Fudan University, Shanghai, China
- Department of Clinical Pharmacology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Qing Yang
- Department of Clinical Pharmacy, School of Pharmacy, Fudan University, Shanghai, China
| | - Xiaolei Yang
- Department of Clinical Pharmacy, School of Pharmacy, Fudan University, Shanghai, China
| | - Wandi Du
- Department of Clinical Pharmacy, School of Pharmacy, Fudan University, Shanghai, China
| | - Xuening Li
- Department of Clinical Pharmacology, Zhongshan Hospital, Fudan University, Shanghai, China
- *Correspondence: Xuening Li, ; Guo Ma,
| | - Guo Ma
- Department of Clinical Pharmacy, School of Pharmacy, Fudan University, Shanghai, China
- *Correspondence: Xuening Li, ; Guo Ma,
| |
Collapse
|
17
|
Guan R, Zeng K, Liu YQ, Liu CY, Li JW, Zhang B, Jiang HQ, Gao MN, Zhang LU, Li JF, Zhang Q, Yang MO, Yang Y. Potential role of circulating exosome miRNAs in left ventricular remodeling of patients with ST-segment elevation myocardial infarction. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Left ventricular remodeling (LVR) in patients with ST-segment elevation myocardial infarction (STEMI) may lead to poor prognosis in which circulating exosome miRNAs play a critical role. The aim of the present study is to identify specific exosome miRNAs for LVR in patients with STEMI.
Method
Plasma exosome miRNAs were assessed in 20 patients (90% male, mean age of 66.95±1.65 years) 3–6 months after STEMI and 24 healthy individuals (83% male, mean age of 33.2±0.93 years) by using qPCR. Of the 20 patients, 8 had post-STEMI LVR according to echocardiographic evaluation, and the others did not. Clinical biochemical data including total cholesterol, HDL-C, LDL-C, LDH and NT-pro-BNP were collected from the patients with STEMI at same time as exosome miRNAs assessment. Specific exosome miRNAs for LVR were identified by using qPCR. Correlations between the dysregulated exosome miRNAs and the clinical biochemical parameters in patients with STEMI were analyzed using spearman correlation test.
Results
Five exosome miRNAs including hsa-miR-181a-3p (p<0.05, fold change = 0.59), let-7d-3p (p=0.01, fold change = 0.51), hsa-miR-224-5p (p<0.01, fold change = 0.11), hsa-miR-23a-3p (p<0.01, fold change = 1.42) and miR-874-3p (p<0.01, fold change = 0.48) were dysregulated in the post-STEMI patients comparing with the healthy individuals. Among them, the exosome miR-181a-3p (p=0.01, fold change = 0.09) and let-7d-3p (p=0.01, fold change = 0.16) were significantly lower expressed in patients with LVR compared to those without (Figure 1). There was no significant difference in expression of the other three miRNAs between patients with and without LVR. Exosome hsa-miR-874-3p positively associated with LDH (p<0.01, r=0.50) in all the patients with STEMI. In vitro cell culture confirmed that the miR-874-3p mimics upregulated expression of apoptosis related gene BMF (p<0.05, fold change = 1.7) in cardiomyocyte. Exosome hsa-miR-23a-3p and hsa-miR-224-5p positively correlated with both HDL-C (p<0.01, r=0.61; p=0.02, r=0.50) and LDL-C (p=0.02, r=0.50; p<0.05, r=0.52) in all patients with STEMI. No correlation between the dysregulated exosome miRNAs and cholesterol or NT-ProBNP was observed (Figure 2).
Conclusions
Circulating exosome miR-181a-3p and let-7d-3p might play a potential role in LVR in patients 3–6 months after STEMI. Exosome hsa-miR-874-3p might be associated with cardiomyocyte injury. Hsa-miR-23a-3p and hsa-miR-224-5p demonstrated an activity in regulation of lipid metabolism and biosynthesis in patients with STEMI.
Funding Acknowledgement
Type of funding sources: Public hospital(s). Main funding source(s): This work was supported by grants from the 3×3 Clinical Scientist Fund of Sun Yat-sen Memorial Hospital
Collapse
Affiliation(s)
- R Guan
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - K Zeng
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - Y Q Liu
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - C Y Liu
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - J W Li
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - B Zhang
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - H Q Jiang
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - M N Gao
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - L U Zhang
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - J F Li
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - Q Zhang
- Sun Yat-sen University, School of Life Sciences , Guangzhou , China
| | - M O Yang
- Sun Yat-sen University, The 7th affiliated hospital, Shenzhen campus , Guangzhou , China
| | - Y Yang
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| |
Collapse
|
18
|
Zhang H, Qin L, Cao D, Guan R, Cheng X, Zhou C. Bioinspired fluorescent molecules realize super bright blue luminescence under sunlight. J Colloid Interface Sci 2022; 632:161-170. [DOI: 10.1016/j.jcis.2022.10.096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 10/12/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022]
|
19
|
Li P, Li R, Wang K, Liu Q, Ren B, Ding Y, Guan R, Cao D. A julolidine-chalcone-based fluorescent probe for detection of Al 3+ in real water sample and cell imaging. Spectrochim Acta A Mol Biomol Spectrosc 2022; 276:121213. [PMID: 35398807 DOI: 10.1016/j.saa.2022.121213] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [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: 01/29/2022] [Revised: 03/19/2022] [Accepted: 03/27/2022] [Indexed: 06/14/2023]
Abstract
A fluorescent probe 1 based on julolidine-chalcone derivative, which can specifically recognize aluminum ion with high selectivity and anti-interference, was developed. Probe 1 has good fluorescence stability and can detect Al3+ with turn-on fluorescence in a wide pH range of 4.0-9.0. The probe has good repeatability for the detection of Al3+ and fluorescence turn-on and off can be repeated with the alternate Al3+ and EDTA. The sensing mechanism is speculated that Al3+ will coordinate with hydroxyl oxygen and carbonyl oxygen on the probe through in situ 1H NMR and HRMS combing with Job's plot. The probe can also detect Al3+ in actual water samples and applied to monitor Al3+ in biological system.
Collapse
Affiliation(s)
- Panpan Li
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Runsen Li
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Kangnan Wang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, Shandong, China
| | - Qiuxin Liu
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Baosheng Ren
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Yanyu Ding
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Ruifang Guan
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Duxia Cao
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China.
| |
Collapse
|
20
|
Zhang H, Nie C, Cao D, Cheng X, Guan R. Constructing unconventional fluorescent molecules by imidazoline ring and its salt of carboxylic acid and their application. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
21
|
Dong X, Wang Y, Guan R, Ren J, Xie Z. Silane-Functionalized Carbon Dots and Their Polymerized Hybrids: From Optoelectronics to Biotherapy. Small 2021; 17:e2105273. [PMID: 34741428 DOI: 10.1002/smll.202105273] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Indexed: 06/13/2023]
Abstract
Nanomaterials usually manifest unique properties in solutions but will be undermined in the solid state. It is necessary to incorporate them into substrates or hybrid them with other functional materials for multiple devices and applications. Though there are a variety of methods to inherit their intrinsic properties like fluorescent and mechanical performance, most nanohybrid materials would lose their transparency irreversibly when construct solid-state devices. As a hot topic of nanomaterials in recent years, scientific works found a type of carbon dots using silane coupling agents as precursors that can overcome the shortcoming. These carbon dots, called silane-functionalized carbon dots (SiCDs), are catching increasing interest due to their versatility. Silane coupling agents endow SiCDs with the ability to disperse in solvents or polymerize with matrices by blending or covalent bonds without loss of transparency and decline of performance. The distinguishing features make SiCDs an ideal high transmittance, high doping concentration nanomaterial. The synergistic effect of SiCDs and hybridized sol-gel solid structures can not only hold the optical features of CDs but also enhance their original physical and chemical performance. This highlight focuses on the connection between SiCDs and organosilanes. Plus, preparation methods, applications, and prospective of SiCDs are mentioned.
Collapse
Affiliation(s)
- Xuezhe Dong
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Materials Science and Engineering, University of Jinan, Jinan, 250022, P. R. China
| | - Yunfeng Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China
| | - Ruifang Guan
- School of Materials Science and Engineering, University of Jinan, Jinan, 250022, P. R. China
| | - Junkai Ren
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Zheng Xie
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| |
Collapse
|
22
|
Ma Y, Zhang H, Wang K, Cao D, Wang M, Guan R, Zhou C. The bright fluorescence of non-aromatic molecules in aqueous solution originates from pH-induced CTE behavior. Spectrochim Acta A Mol Biomol Spectrosc 2021; 254:119604. [PMID: 33676346 DOI: 10.1016/j.saa.2021.119604] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 11/19/2020] [Revised: 01/22/2021] [Accepted: 02/05/2021] [Indexed: 06/12/2023]
Abstract
Non-aromatic fluorescent materials with inherent visible light emission have received widespread attention. In this work, a biomimetic fluorescent molecule CA-AEP with a dipeptide structure is introduced. CA-AEP will emit bright biomimetic fluorescence in aqueous solutions by adjusting the pH, which has never been reported. This unique luminescent characteristic can be rationalized by the clustering-triggered emission (CTE) mechanism. In addition, CA-AEP can be used to monitor the maximum dynamic pH in the alkaline range of aqueous systems. Finally, the cytotoxicity assay to A549 cells showed that CA-AEP was non-toxic. Therefore, this work provides a new type of luminogen, which has potential application prospects in the field of environmental monitoring and cell biology.
Collapse
Affiliation(s)
- Yunqian Ma
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Hao Zhang
- Research Institute of Polymer Materials, School of Materials Science and Engineering, Shandong University, Jinan 250061, China
| | - Kexin Wang
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Duxia Cao
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China
| | - Mingkai Wang
- School of Biological Science and Technology, University of Jinan, Jinan, Shandong 250022, China.
| | - Ruifang Guan
- School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China.
| | - Chuanjian Zhou
- Research Institute of Polymer Materials, School of Materials Science and Engineering, Shandong University, Jinan 250061, China.
| |
Collapse
|
23
|
Ma Y, Zhang H, Cao D, Chen Q, Guan R, Zhou C. Fluorescence resonance energy transfer fluorescent polymer dots without conventional chromophores: Synthesis, emission mechanism and applications as Cu2+ probe and fluorescent ink. Chemical Engineering Journal Advances 2020. [DOI: 10.1016/j.ceja.2020.100046] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
|
24
|
Li Z, Zhu Y, Gong X, Zhang Y, Xing M, Ma S, Guan R, Cao D, Liu Z. Bisulfite recognition properties of two benzothiazole inner salt compounds. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112739] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
25
|
Brose M, Smit J, Lin CC, Tori M, Bowles D, Worden F, Shen DY, Huang SM, Alevizaki M, Peeters R, Takahashi S, Rumyantsev P, Guan R, Babajanyan S, Ozgurdal K, Sugitani I, Pitoia F, Lamartina L. 1918P Final analysis of RIFTOS MKI, a global, non-interventional study assessing the use of multikinase inhibitors (MKIs) for the treatment of patients with asymptomatic radioactive iodine-refractory differentiated thyroid cancer (RAI-R DTC). Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1406] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
|
26
|
Kawchuk GN, Guan R, Keen C, Hauer B, Kondrak G. Using artificial intelligence algorithms to identify existing knowledge within the back pain literature. Eur Spine J 2020; 29:1917-1924. [PMID: 32445046 DOI: 10.1007/s00586-020-06447-y] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 04/16/2020] [Accepted: 05/02/2020] [Indexed: 11/27/2022]
Abstract
PURPOSE Artificial intelligence algorithms can now identify hidden data patterns within the scientific literature. In 2019, these algorithms identified a thermoelectric material within the pre-2009 chemistry literature; years before its discovery in 2012. This approach inspired us to apply this algorithm to the back pain literature as the cause of back pain remains unknown in 90% of cases. METHODS We created a subset of all PubMed abstracts containing "back" and "pain" and then trained the Word2vec algorithm to predict word proximity. We then identified word pairings having high vector proximities between three spinal domains: anatomy, pathology and treatment. We plotted both between-domain and within-domain proximities then used the highest proximity pairs as ground truths in analogy testing to identify known associations (e.g., Canal is to Stenosis as Multifidus is to ?) RESULTS: We found 50,038 abstracts resulting in 27,984 unique words and 108,252 instances of "back pain". Ground truth pairings ranged in proximity from 0.86 to 0.70. Plotting revealed unique proximity representations between the three spine domains. From analogy testing, we identified 13 known word associations (pars_interarticularis is to stress_reaction as nerve_root is to compression). CONCLUSIONS Artificial intelligence algorithms can successfully extract complex concepts from back pain literature. While use of AI algorithms to discover potentially unknown word associations requires future validation, our results provide investigators with a novel tool to generate new hypotheses regarding the origins of LBP and other spine related topics. To encourage use of these tools, we have created a free web-based app for investigator-driven queries.
Collapse
Affiliation(s)
- G N Kawchuk
- Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Canada.
| | - R Guan
- Department of Mechanical Engineering, Faculty of Engineering, University of Alberta, Edmonton, Canada
| | - C Keen
- Department of Mechanical Engineering, Faculty of Engineering, University of Alberta, Edmonton, Canada
| | - B Hauer
- Department of Computing Science, Faculty of Science, University of Alberta, Edmonton, Canada
| | - G Kondrak
- Department of Computing Science, Faculty of Science, University of Alberta, Edmonton, Canada
| |
Collapse
|
27
|
Chen Q, Wang H, Luan Q, Duan R, Cao X, Fang Y, Ma D, Guan R, Hu X. Synergetic effects of defects and acid sites of 2D-ZnO photocatalysts on the photocatalytic performance. J Hazard Mater 2020; 385:121527. [PMID: 31708287 DOI: 10.1016/j.jhazmat.2019.121527] [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] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 10/21/2019] [Accepted: 10/22/2019] [Indexed: 06/10/2023]
Abstract
Regulation of defects and surface acidic sites of photocatalysts is an efficient approach to improve the photocatalytic activity. Ultrathin 2D-ZnO photocatalysts were prepared to uncover the synergetic effects of defects and surface acidic sites on the photocatalytic activity. The reaction constant for photocatalytic degradation of MB upon ZnO-S is 2.26, 2.82, 12.2 times higher than that of SH-500, SO-500, and ZnO-R, respectively. The results revealed that the surface defects, hydroxyl group and chemisorbed water played pivotal roles in the generation of reactive oxygen species (ROS). Although the limited improvement of visible absorption was achieved after introduction of oxygen vacancy (VO), the overall photocatalytic activity decreased due to the reduced ROS production capacity shown by density functional theory (DFT) calculations. Hydroxyl radical is the key ROS in degradation of organics, and electron contributes a little bigger than hole in the generation of hydroxyl radical. Importantly, the decrease in surface acidic sites resulted in the decreased photocatalytic activity, proven by the dynamics of photoinduced carriers. This study reveals that the improved photocatalytic activity of 2D-ZnO photocatalysts can be attributed to the synergetic effects of surface defects and acidic sites rather than the enhanced visible absorption resulted from the VO introduction.
Collapse
Affiliation(s)
- Qifeng Chen
- School of Materials Science & Engineering, University of Jinan, Nanxinzhuang West Road 336, Jinan, Shandong, 250022, China.
| | - Hui Wang
- School of Materials Science & Engineering, University of Jinan, Nanxinzhuang West Road 336, Jinan, Shandong, 250022, China
| | - Qingrui Luan
- School of Materials Science & Engineering, University of Jinan, Nanxinzhuang West Road 336, Jinan, Shandong, 250022, China
| | - Ran Duan
- Ran Duan, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun North First Street 2, Beijing, 100190, China
| | - Xingzhong Cao
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Yanfen Fang
- College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang, 443002, China.
| | - Delong Ma
- School of Materials Science & Engineering, University of Jinan, Nanxinzhuang West Road 336, Jinan, Shandong, 250022, China
| | - Ruifang Guan
- School of Materials Science & Engineering, University of Jinan, Nanxinzhuang West Road 336, Jinan, Shandong, 250022, China
| | - Xun Hu
- School of Materials Science & Engineering, University of Jinan, Nanxinzhuang West Road 336, Jinan, Shandong, 250022, China.
| |
Collapse
|
28
|
Xu C, Guan R, Cao D, Liu K, Chen Q, Ding Y, Yan Y. Bioinspired non-aromatic compounds emitters displaying aggregation independent emission and recoverable photo-bleaching. Talanta 2020; 206:120232. [DOI: 10.1016/j.talanta.2019.120232] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 07/22/2019] [Accepted: 08/04/2019] [Indexed: 11/26/2022]
|
29
|
Guan R, Dong B, Xu C, Zhang H, Cao D, Lin W. A strategy to construct fluorescent non-aromatic small-molecules: hydrogen bonds contributing to the unexpected fluorescence. Chem Commun (Camb) 2020; 56:4424-4427. [DOI: 10.1039/c9cc09906a] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Propanedioyl dihydrazide (PDH), traditionally believed to be non-fluorescent, was first discovered to emit substantial fluorescence in both the solid state and solvents.
Collapse
Affiliation(s)
- Ruifang Guan
- School of Materials Science and Engineering
- Institute of Fluorescent Probes for Biological Imaging
- University of Jinan
- Jinan
- China
| | - Baoli Dong
- School of Materials Science and Engineering
- Institute of Fluorescent Probes for Biological Imaging
- University of Jinan
- Jinan
- China
| | - Cui Xu
- School of Materials Science and Engineering
- Institute of Fluorescent Probes for Biological Imaging
- University of Jinan
- Jinan
- China
| | - Hao Zhang
- School of Materials Science and Engineering
- Institute of Fluorescent Probes for Biological Imaging
- University of Jinan
- Jinan
- China
| | - Duxia Cao
- School of Materials Science and Engineering
- Institute of Fluorescent Probes for Biological Imaging
- University of Jinan
- Jinan
- China
| | - Weiying Lin
- School of Materials Science and Engineering
- Institute of Fluorescent Probes for Biological Imaging
- University of Jinan
- Jinan
- China
| |
Collapse
|
30
|
Guan R, Lin R, Jin R, Lu L, Liu X, Hu S, Sun L. Chitinase-like protein YKL-40 regulates human bronchial epithelial cells proliferation, apoptosis, and migration through TGF-β1/Smads pathway. Hum Exp Toxicol 2019; 39:451-463. [PMID: 31797699 DOI: 10.1177/0960327119891218] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In order to study the effects of chitinase-like protein YKL-40 on proliferation, apoptosis, and migration of human bronchial epithelial cell line (BEAS-2B), and the underlying mechanisms, we cultured BEAS-2B alone or with different concentrations of YKL-40. thiazolyl blue tetrazolium bromide (MTT) assay was used to examine the cell proliferation. Annexin V-fluorescein isothiocyanate isomer (FITC)/propidium iodide staining and scratch assay were performed to test the cell apoptosis and migration. The concentrations of transforming growth factor-β1 (TGF-β1), Smad3, Smad7, alpha-smooth muscle actin (α-SMA), interleukin-4 (IL-4), IL-6, and IL-8 in the cell culture supernatant were detected by enzyme-linked immunosorbent assay. The messenger RNA and protein levels of YKL-40, TGF-β1, Smad3, Smad7, and α-SMA were detected by reverse transcription polymerase chain reaction and Western blot. BEAS-2B cells cultured with different concentrations of YKL-40 showed significantly higher cell proliferation and migration and inflammatory cytokines compared with that of control group, while the cell apoptosis was significantly lower than that of control group (p < 0.05). In addition, BEAS-2B cells cultured with YKL-40 had increased TGF-β1, Smad3, Smad7, and α-SMA levels in the supernatant, compared with that of BEAS-2B cells cultured alone (p < 0.05). Furthermore, LY364947, as TGF-β1/Smads signaling pathway inhibitor, decreased cell proliferation and migration ability and enhanced cell apoptosis of BEAS-2B cells compared with control group (p < 0.05). However, YKL-40 administration reversed the effect of LY364947 on the biological behavior of BEAS-2B cells. YKL-40 could affect the biological behaviors of BEAS-2B cells, which might be related to the TGF-β1/Smads pathway.
Collapse
Affiliation(s)
- R Guan
- Department of Pediatrics, The Affiliated Hospital of Qingdao University, Qingdao, China.,Both the authors contributed equally to this work
| | - R Lin
- Department of Pediatrics, The Affiliated Hospital of Qingdao University, Qingdao, China.,Both the authors contributed equally to this work
| | - R Jin
- Department of Pediatrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - L Lu
- Department of Pediatrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - X Liu
- Department of Pediatrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - S Hu
- Department of Pediatrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - L Sun
- Department of Pediatrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| |
Collapse
|
31
|
Zhu Y, Wang K, Wu X, Sun Y, Gong X, Cao D, Guan R, Liu Z. A highly sensitive turn-on fluorescent probe for real-time detecting hypochlorite and its application in living cells. Talanta 2019; 209:120548. [PMID: 31892058 DOI: 10.1016/j.talanta.2019.120548] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [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: 07/04/2019] [Revised: 10/29/2019] [Accepted: 11/08/2019] [Indexed: 02/09/2023]
Abstract
It is very necessary to develop real-time, highly sensitive and selective fluorescent probes for hypochlorite (ClO-) in living cells owing to hypochlorite's important role in pathological and physiological processes and its short life. Herein, a pyrene Schiff's base derivative was successfully developed for real-time (within seconds), highly sensitive detecting ClO- with a low detection limit (5.7 nM) and wide pH range (4.0-11.0) based on nucleophilic addition and subsequent hydrolysis mechanism. The probe has aggregation-induced emission properties and emits yellow fluorescence (544 nm) in PBS solution, while it exhibits blue fluorescence in other organic solvents (426 nm (THF) - 460 nm (MeOH)). The probe can be used to response ClO- in A549 cells with low cytotoxicity, a good cell membranes penetration and good biocompatibility. Cell uptake experiment indicates that probe getting into the cells is energy-dependent and is not attributed to endocytosis. Moreover, the probe is successfully used in real water sample to detect ClO- and it can be expected to be applied to ClO- participated biological and pathological functions in biological systems.
Collapse
Affiliation(s)
- Yilin Zhu
- School of Materials Science and Engineering, University of Jinan, Jinan, 250022, Shandong, China
| | - Kangnan Wang
- School of Materials Science and Engineering, University of Jinan, Jinan, 250022, Shandong, China
| | - Xiangwen Wu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan, 250014, Shandong, China
| | - Yanan Sun
- Shandong Vocational College of Industry, Zibo, 256414, Shandong, China
| | - Xiangshuo Gong
- School of Materials Science and Engineering, University of Jinan, Jinan, 250022, Shandong, China
| | - Duxia Cao
- School of Materials Science and Engineering, University of Jinan, Jinan, 250022, Shandong, China.
| | - Ruifang Guan
- School of Materials Science and Engineering, University of Jinan, Jinan, 250022, Shandong, China.
| | - Zhiqiang Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250022, Shandong, China.
| |
Collapse
|
32
|
Zhang H, Dong X, Wang J, Guan R, Cao D, Chen Q. Fluorescence Emission of Polyethylenimine-Derived Polymer Dots and Its Application to Detect Copper and Hypochlorite Ions. ACS Appl Mater Interfaces 2019; 11:32489-32499. [PMID: 31393690 DOI: 10.1021/acsami.9b09545] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Polymer dots with nonconjugated groups that are facile to synthesize and environmentally friendly generally attract substantial interest. However, their fluorescence-emitting mechanisms are not clear. In this paper, nonconjugated polymer dots (N-PDs) are synthesized by amidation reaction between polyethylenimine (PEI) and citric acid (CA), then self-assemble into rice-like dots in aqueous phase with a high fluorescence quantum yield. Such nitrogen-containing nonconjugated compounds N-PDs are believed to be inherently fluorescent, and the reported reasons for fluorescence-emitting are discussed. Importantly, these N-PDs can be used as an excellent fluorescent probe to detect Cu2+ and ClO- in aqueous solutions. Cu2+ could combine with the PEI moiety of the N-PDs to form a copper amine complex and then quench the fluorescence by an internal filtration effect. ClO- could oxidize the hydroxyl groups on the surface of the N-PDs to form a positive charge, blocking electron transfer between the hydroxyl groups and the chromophore groups. Finally, the sensor was successfully applied to the detection of Cu2+ and ClO- in environmental water samples.
Collapse
Affiliation(s)
- Hao Zhang
- School of Materials Science and Engineering , University of Jinan , Jinan , Shandong 250022 , China
| | - Xuezhe Dong
- School of Materials Science and Engineering , University of Jinan , Jinan , Shandong 250022 , China
| | - Jiahui Wang
- School of Materials Science and Engineering , University of Jinan , Jinan , Shandong 250022 , China
| | - Ruifang Guan
- School of Materials Science and Engineering , University of Jinan , Jinan , Shandong 250022 , China
| | - Duxia Cao
- School of Materials Science and Engineering , University of Jinan , Jinan , Shandong 250022 , China
| | - Qifeng Chen
- School of Materials Science and Engineering , University of Jinan , Jinan , Shandong 250022 , China
| |
Collapse
|
33
|
Zhu Y, Gong X, Li Z, Zhao X, Liu Z, Cao D, Guan R. A simple turn-on ESIPT and PET-based fluorescent probe for detection of Al 3+ in real-water sample. Spectrochim Acta A Mol Biomol Spectrosc 2019; 219:202-205. [PMID: 31048249 DOI: 10.1016/j.saa.2019.04.058] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 04/21/2019] [Indexed: 06/09/2023]
Abstract
Aluminum is known as the most ubiquitous metal in earth's crust but its excessive exposure will cause damage to environment and health of the organism. Here, a turn-on Schiff base fluorescence probe STH based on excited state intramolecular proton transfer and photoelectron transfer processes for Al3+ detection with fast response rate (within minutes), low detection limit (4.26×10-8M), high selectivity and reasonable pH application range (5.0-8.0) was developed. Fluorescence titration experiments show that probe STH has an excellent linear relationship (R2=0.9694) with Al3+ concentration and could be applied to quantitatively recognize Al3+ in real-water samples. Based on Job's plot and in situ mass spectra, two STH molecules will complex with Al3+ to form 2:1 complexation with oxygen atoms of hydroxyl and carbonyl groups and nitrogen atom of CN bond participating in coordination.
Collapse
Affiliation(s)
- Yilin Zhu
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Xiangshuo Gong
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Zhipeng Li
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Xun Zhao
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Zhiqiang Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, Shandong, China
| | - Duxia Cao
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China.
| | - Ruifang Guan
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China.
| |
Collapse
|
34
|
Wang YM, Ma YQ, Bi SC, Ma XD, Guan R, Wang SH, Lu MQ, Shi FS, Hu SH. Therapeutic effect of ginsenoside Rg1 on mastitis experimentally induced by lipopolysaccharide in lactating goats. J Dairy Sci 2019; 102:2443-2452. [PMID: 30612791 DOI: 10.3168/jds.2018-15280] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 11/13/2018] [Indexed: 12/29/2022]
Abstract
Escherichia coli is a cause of subclinical and clinical mastitis in dairy cattle and goats, and sometimes causes severe clinical disease that may result in death of the animal. Previous investigation showed that ginsenoside Rg1 extracted from Panax ginseng C.A. Meyer (Araliaceae) has an anti-inflammatory effect on the sepsis induced by E. coli lipopolysaccharide via competitive binding to toll-like receptor 4. We hypothesized that intravenous injection of Rg1 had therapeutic effect on mastitis experimentally induced by intramammary infusion of lipopolysaccharide in lactating goats. In this study, 9 lactating goats were randomly assigned to 1 of the 3 groups: (1) lipopolysaccharide intramammary infusion + saline intravenous injection, (2) lipopolysaccharide intramammary infusion + Rg1 intravenous injection, and (3) saline intramammary administration + saline intravenous injection. Because no adverse clinical signs were observed after intramammary infusion of saline and intravenous injection of Rg1 in a preliminary experiment, and available qualified goats were limited in this study, this treatment was not included in this study. One udder half of each goat received intramammary infusion of lipopolysaccharide (50 μg/kg of body weight; groups 1 and 2) or saline solution (group 3), and the other half was infused with 2 mL of saline solution at h 0. Afterward, intravenous injections of saline solution (groups 1 and 3) or Rg1 (2.5 mg/kg of body weight; group 2) were administered at h 2 and 4 post-lipopolysaccharide challenge. Blood and milk samples were collected 3, 6, 9, 12, 15, 18, 21, 24, 48, and 72 h post-lipopolysaccharide challenge, and clinical signs were monitored hourly after lipopolysaccharide challenge within the first 10 h and at the same time points as blood samples. The results showed that Rg1 treatment downregulated rectal temperature, udder skin temperature, udder girth, milk somatic cell count, and N-acetyl-β-d-glucosaminidase and upregulated milk production, lactose, and recovered blood components, such as white blood cells, neutrophils, lymphocytes, total proteins, albumin, and globulin. Considering the positive therapeutic effect on lipopolysaccharide-induced mastitis in goats presented in this study as well as the anti-inflammatory activity found previously, the botanical Rg1 deserves further study as a therapeutic agent in the treatment of E. coli mastitis in dairy animals.
Collapse
Affiliation(s)
- Y M Wang
- Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Zhejiang 310058, China
| | - Y Q Ma
- Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Zhejiang 310058, China
| | - S C Bi
- Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Zhejiang 310058, China
| | - X D Ma
- Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Zhejiang 310058, China
| | - R Guan
- Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Zhejiang 310058, China
| | - S H Wang
- Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Zhejiang 310058, China
| | - M Q Lu
- Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Zhejiang 310058, China
| | - F S Shi
- Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Zhejiang 310058, China
| | - S H Hu
- Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Zhejiang 310058, China.
| |
Collapse
|
35
|
Xing M, Wang K, Wu X, Ma S, Cao D, Guan R, Liu Z. A coumarin chalcone ratiometric fluorescent probe for hydrazine based on deprotection, addition and subsequent cyclization mechanism. Chem Commun (Camb) 2019; 55:14980-14983. [DOI: 10.1039/c9cc08174g] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A coumarin chalcone derivative with a levulinic acid terminal group acts as a ratiometric fluorescent probe for hydrazine based on deprotection, addition and a subsequent cyclization reaction mechanism.
Collapse
Affiliation(s)
- Miaomiao Xing
- School of Materials Science and Engineering
- University of Jinan
- Jinan 250022
- China
| | - Kangnan Wang
- School of Materials Science and Engineering
- University of Jinan
- Jinan 250022
- China
| | - Xiangwen Wu
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Shuyue Ma
- School of Materials Science and Engineering
- University of Jinan
- Jinan 250022
- China
| | - Duxia Cao
- School of Materials Science and Engineering
- University of Jinan
- Jinan 250022
- China
| | - Ruifang Guan
- School of Materials Science and Engineering
- University of Jinan
- Jinan 250022
- China
| | - Zhiqiang Liu
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- China
| |
Collapse
|
36
|
Sun Y, Shan Y, Sun N, Li Z, Wu X, Guan R, Cao D, Zhao S, Zhao X. Cyanide and biothiols recognition properties of a coumarin chalcone compound as red fluorescent probe. Spectrochim Acta A Mol Biomol Spectrosc 2018; 205:514-519. [PMID: 30064116 DOI: 10.1016/j.saa.2018.07.071] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 04/26/2018] [Revised: 07/07/2018] [Accepted: 07/24/2018] [Indexed: 06/08/2023]
Abstract
A novel coumarin chalcone derivative 1 was designed, synthesized and characterized by nuclear magnetic resonance spectra and high resolution mass spectrum. The photophysical and recognition properties of the compound as red fluorescent probe for cyanide and biothiols including cysteine (Cys), homocysteine (Hcy) and glutathione (GSH) have been discussed systematically. Red fluorescence probe 1 was able to achieve rapid and selective identification for cyanide anion and biothiols in aqueous solutions with red fluorescence quench. In addition, the recognition mechanism of 1 was demonstrated by in situ 1H NMR. The compound has two potential nucleophilic sensing sites including carbon-carbon double bond and 4-position of coumarin. The results indicate that cyanide anions can be bonded to these two sites to afford 2:1 bonding product. But biothiols only are bonded to carbon-carbon double bond by Michael addition reaction. The bonding of both cyanide and biothiols to the probe disrupts intramolecular charge transfer and leads to fluorescence quench.
Collapse
Affiliation(s)
- Yatong Sun
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Yanyan Shan
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Ning Sun
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Zhipeng Li
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Xiangwen Wu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, Shandong, China
| | - Ruifang Guan
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Duxia Cao
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China.
| | - Songfang Zhao
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China.
| | - Xun Zhao
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| |
Collapse
|
37
|
Wang H, Chen Q, Luan Q, Duan R, Guan R, Cao X, Hu X. Photocatalytic Properties Dependent on the Interfacial Defects of Intergrains within TiO
2
Mesocrystals. Chemistry 2018; 24:17105-17116. [PMID: 30203868 DOI: 10.1002/chem.201803516] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 09/03/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Hui Wang
- School of Material Science & EngineeringUniversity of Jinan No.336, West Road of Nanxinzhuang Jinan Shandong 250022 P.R. China
| | - Qifeng Chen
- School of Material Science & EngineeringUniversity of Jinan No.336, West Road of Nanxinzhuang Jinan Shandong 250022 P.R. China
| | - Qingrui Luan
- School of Material Science & EngineeringUniversity of Jinan No.336, West Road of Nanxinzhuang Jinan Shandong 250022 P.R. China
| | - Ran Duan
- Institute of ChemistryChinese Academy of Sciences Zhongguancun North First Street No. 2 Beijing 100190 P.R. China
| | - Ruifang Guan
- School of Material Science & EngineeringUniversity of Jinan No.336, West Road of Nanxinzhuang Jinan Shandong 250022 P.R. China
| | - Xingzhong Cao
- The Institute of High Energy PhysicsChinese Academy of Sciences 19B Yuquan Lu, Shijingshan District Beijing 100049 P.R. China
| | - Xun Hu
- School of Material Science & EngineeringUniversity of Jinan No.336, West Road of Nanxinzhuang Jinan Shandong 250022 P.R. China
| |
Collapse
|
38
|
Li M, Lei H, Xu Y, Li H, Yang B, Yu C, Yuan Y, Fang D, Xin Z, Guan R. Exosomes derived from mesenchymal stem cells exert therapeutic effect in a rat model of cavernous nerves injury. Andrology 2018; 6:927-935. [PMID: 30009463 DOI: 10.1111/andr.12519] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 04/25/2018] [Accepted: 06/05/2018] [Indexed: 01/08/2023]
Affiliation(s)
- M. Li
- Molecular Biology Laboratory of Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - H. Lei
- Department of Urology; Beijing Chao-Yang Hospital; Capital Medical University; Beijing China
| | - Y. Xu
- Department of Urology; First Hospital Affiliated to Chinese; PLA General Hospital; Beijing China
| | - H. Li
- Molecular Biology Laboratory of Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - B. Yang
- Molecular Biology Laboratory of Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - C. Yu
- Department of Urology; General Hospital of Ningxia Medical University; Ningxia Medical University; Ningxia China
| | - Y. Yuan
- Molecular Biology Laboratory of Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - D. Fang
- Molecular Biology Laboratory of Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - Z. Xin
- Molecular Biology Laboratory of Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - R. Guan
- Molecular Biology Laboratory of Andrology Center; Peking University First Hospital; Peking University; Beijing China
| |
Collapse
|
39
|
Abstract
Large-scale knowledge bases, as the foundations for promoting the development of artificial intelligence, have attracted increasing attention in recent years. These knowledge bases contain billions of facts in triple format; yet, they suffer from sparse relations between entities. Researchers proposed the path ranking algorithm (PRA) to solve this fatal problem. To improve the scalability of knowledge inference, PRA exploits random walks to find Horn clauses with chain structures to predict new relations given existing facts. This method can be regarded as a statistical classification issue for statistical relational learning (SRL). However, large-scale knowledge base completion demands superior accuracy and scalability. In this paper, we propose the path feature learning model (PFLM) to achieve this urgent task. More precisely, we define a two-stage model: the first stage aims to learn path features from the existing knowledge base and extra parsed corpus; the second stage uses these path features to predict new relations. The experimental results demonstrate that the PFLM can learn meaningful features and can achieve significant and consistent improvements compared with previous work.
Collapse
Affiliation(s)
- X. Lin
- Key Laboratory for Symbol Computation and Knowledge Engineering of National Education Ministry, College of Computer Science and Technology, Jilin University, Changchun 130012, China
| | - Y. Liang
- Key Laboratory for Symbol Computation and Knowledge Engineering of National Education Ministry, College of Computer Science and Technology, Jilin University, Changchun 130012, China; Zhuhai Laboratory of Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education, Zhuhai College of Jilin University, Zhuhai 519041, China
| | - L. Wang
- School of Management Science and Information Engineering, Jilin Province Key Laboratory of Internet Finance, Jilin University of Finance and Economics, Changchun 130117, China
| | - X. Wang
- Key Laboratory for Symbol Computation and Knowledge Engineering of National Education Ministry, College of Computer Science and Technology, Jilin University, Changchun 130012, China
| | - M. Yang
- MidSouth Bioinformatics Center and Joint Bioinformatics Ph.D. Program, University of Arkansas at Little Rock and University of Arkansas for Medical Sciences, 2801 S. University Avenue, Little Rock, Arkansas 72204, USA
| | | |
Collapse
|
40
|
Sun Y, Sun Y, Zhao S, Cao D, Guan R, Liu Z, Yu X, Zhao X. Efficient Solution- and Solid-State Fluorescence for a Series of 7-Diethylaminocoumarin Amide Compounds. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700555] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yatong Sun
- School of Material Science and Engineering; University of Jinan; Shandong 250022 P. R. China
| | - Yunhui Sun
- School of Material Science and Engineering; University of Jinan; Shandong 250022 P. R. China
| | - Songfang Zhao
- School of Material Science and Engineering; University of Jinan; Shandong 250022 P. R. China
| | - Duxia Cao
- School of Material Science and Engineering; University of Jinan; Shandong 250022 P. R. China
| | - Ruifang Guan
- School of Material Science and Engineering; University of Jinan; Shandong 250022 P. R. China
| | - Zhiqiang Liu
- State Key Laboratory of Crystal Materials; Shandong University; Shandong 250100 P. R. China
| | - Xueying Yu
- School of Material Science and Engineering; University of Jinan; Shandong 250022 P. R. China
| | - Xun Zhao
- School of Material Science and Engineering; University of Jinan; Shandong 250022 P. R. China
| |
Collapse
|
41
|
Cao YN, Zhou F, Song NX, Fang Y, Guan R. [Modulation of umbilical cord blood mesenchymal stem cells on Treg cells in the patients with aplastic anemia]. Zhonghua Yi Xue Za Zhi 2017; 97:2678-2681. [PMID: 28910956 DOI: 10.3760/cma.j.issn.0376-2491.2017.34.008] [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: 11/05/2022]
Abstract
Objective: To research the modulation of Umbilical cord blood mesenchymal stem cells on the number and function of Treg cells in the patients with aplastic anemia, as well as the expression of LFA-1 on Treg cells. Methods: A total of 20 newly diagnosed NSAA patients were collected from May 2015 to Jun 2016 in Department of Hematopathy, General Hospital of Jinan Military, and 10 healthy volunteers were recruited as controls. Separation of the patients and controls with peripheral blood mononuclear cells were divided into two groups, including PBMCs culture alone, PBMCs co-culture with UC-MSCs, application of flow cytometry detect respectively the proportion of the Treg cells and the expression of LFA-1 on Treg cells under different culture conditions. The Treg cells and CD4(+) CD25(-)T lymphocyte were separated by magnetic cell sorting (MACS) system, CFSE label CD4(+) CD25(-)T lymphocyte, comparing the inhibitive function of Treg cells on CD4(+) CD25(-)T lymphocyte with or without co-culture with UC-MSCs. Results: The intensity of fluorescence expression of LFA-1 on T lymphocyte in aplastic anemia increased obviously((71.4±10.1)vs(52.5±8.7) , P=0.002), but the LFA-1 expressed on Treg cells had no significant difference(P=0.199). After co-cultured with UC-MSCs, the proportion of LFA-1 on Treg cells in aplastic anemia reduced greatly ((20.96±1.76)% vs(44.26±1.19)%, P=0.012), at the same time, UC-MSCs increased the proportion of Treg cells obviously ((5.33±1.14)%vs(1.94±0.65)%, P=0.003), but the effect of Treg cells on the mean frquency of dividing CD4(+) CD25(-)T lymphocyte had no significant difference with or without co-culture with UC-MSCs(P=0.290). Conclusions: The intensity of fluorescence expression of LFA-1 on lymphocyte in aplastic anemia increases obviously, indicating the possible pathogenesis of AA. UC-MSCs inhibit the expression of LFA-1 on Treg cells and enhance the proportion of Treg cells, but UC-MSCs doesn't directly improve the immunosuppression of single Treg cells.
Collapse
Affiliation(s)
- Y N Cao
- Department of Hematopathy, General Hospital of Jinan Military, Jinan 250031, China
| | | | | | | | | |
Collapse
|
42
|
Xu Y, Yang Q, Cao D, Liu Z, Zhao S, Guan R, Wang Y, Wu Q, Yu X. A novel silicon-oxygen aurone derivative assisted by graphene oxide as fluorescence chemosensor for fluoride anions. Spectrochim Acta A Mol Biomol Spectrosc 2017; 182:37-41. [PMID: 28391072 DOI: 10.1016/j.saa.2017.03.073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 03/24/2017] [Accepted: 03/31/2017] [Indexed: 06/07/2023]
Abstract
A novel silicon-oxygen aurone derivative TBDPSA was synthesized and used for the detection of fluoride anions in aqueous solution based on a specifically F--triggered silicon-oxygen cleavage. Even though the compound has shown high selectivity, obvious absorption and fluorescence response for fluoride anions in aqueous solution, but it also is suffered from many limits, such as low detection sensitivity and long response time. Here the compound was successfully assembled on the graphene oxide (GO) surface by π-π stacking. GO improves recognition sensitivity and shortens response time of TBDPSA for fluoride anions by taking advantage of the nanocarrier GO. Compared with TBDPSA, the response time of GO/TBDPSA is shortened greatly from 1h to <5s and the detection limit is lowered about four times with fluorescence as detected signal. Generally speaking, GO is an excellent promoter for accelerate recognition.
Collapse
Affiliation(s)
- Yongxiao Xu
- School of Material Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Qinghua Yang
- School of Material Science and Engineering, Shandong University, Jinan 250061, Shandong, China
| | - Duxia Cao
- School of Material Science and Engineering, University of Jinan, Jinan 250022, Shandong, China.
| | - Zhiqiang Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, Shandong, China
| | - Songfang Zhao
- School of Material Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Ruifang Guan
- School of Material Science and Engineering, University of Jinan, Jinan 250022, Shandong, China.
| | - Yibing Wang
- School of Material Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Qianqian Wu
- School of Material Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| | - Xueying Yu
- School of Material Science and Engineering, University of Jinan, Jinan 250022, Shandong, China
| |
Collapse
|
43
|
Guan R, Zhang L, Su QP, Mickolajczyk KJ, Chen GY, Hancock WO, Sun Y, Zhao Y, Chen Z. Crystal structure of Zen4 in the apo state reveals a missing conformation of kinesin. Nat Commun 2017; 8:14951. [PMID: 28393873 PMCID: PMC5394238 DOI: 10.1038/ncomms14951] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 02/15/2017] [Indexed: 12/25/2022] Open
Abstract
Kinesins hydrolyse ATP to transport intracellular cargoes along microtubules. Kinesin neck linker (NL) functions as the central mechano-chemical coupling element by changing its conformation through the ATPase cycle. Here we report the crystal structure of kinesin-6 Zen4 in a nucleotide-free, apo state, with the NL initial segment (NIS) adopting a backward-docked conformation and the preceding α6 helix partially melted. Single-molecule fluorescence resonance energy transfer (smFRET) analyses indicate the NIS of kinesin-1 undergoes similar conformational changes under tension in the two-head bound (2HB) state, whereas it is largely disordered without tension. The backward-docked structure of NIS is essential for motility of the motor. Our findings reveal a key missing conformation of kinesins, which provides the structural basis of the stable 2HB state and offers a tension-based rationale for an optimal NL length to ensure processivity of the motor.
Collapse
Affiliation(s)
- Ruifang Guan
- MOE Key Laboratory of Protein Science, Tsinghua University, Beijing 100084, China.,School of Life Science, Tsinghua University, Beijing 100084, China
| | - Lei Zhang
- National Laboratory of Biomacromolecules, Institute of Biophysics, Beijing 100101, China
| | - Qian Peter Su
- State Key Laboratory of Membrane Biology, Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, China
| | - Keith J Mickolajczyk
- Department of Biomedical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Geng-Yuan Chen
- Department of Biomedical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - William O Hancock
- Department of Biomedical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Yujie Sun
- State Key Laboratory of Membrane Biology, Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, Peking University, Beijing 100871, China
| | - Yongfang Zhao
- National Laboratory of Biomacromolecules, Institute of Biophysics, Beijing 100101, China
| | - Zhucheng Chen
- MOE Key Laboratory of Protein Science, Tsinghua University, Beijing 100084, China.,School of Life Science, Tsinghua University, Beijing 100084, China
| |
Collapse
|
44
|
Xu Y, Wang Y, Zhao S, Guan R, Cao D, Wu Q, Yu X, Sun Y. A novel fluorescence chemodosimeter for fluoride anions in aqueous solution based on siloxane-aurone moiety. INORG CHEM COMMUN 2017. [DOI: 10.1016/j.inoche.2017.03.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
45
|
Xu Y, Xin H, Wu Y, Guan R, Lei H, Fu X, Xin Z, Yang Y. Effect of icariin in combination with daily sildenafil on penile atrophy and erectile dysfunction in a rat model of bilateral cavernous nerves injury. Andrology 2017; 5:598-605. [PMID: 28296277 DOI: 10.1111/andr.12341] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 12/19/2016] [Accepted: 01/24/2017] [Indexed: 12/25/2022]
Affiliation(s)
- Y. Xu
- Wound Healing and Cell Biology Laboratory; Institute of Basic Medical Science; Chinese PLA General Hospital; Beijing China
| | - H. Xin
- Department of Ophthalmology; Beijing ChaoYang Hospital; Capital Medical University; Beijing China
| | - Y. Wu
- Department of Urology; First Hospital Affiliated to Chinese PLA General Hospital; Beijing China
| | - R. Guan
- Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - H. Lei
- Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - X. Fu
- Wound Healing and Cell Biology Laboratory; Institute of Basic Medical Science; Chinese PLA General Hospital; Beijing China
| | - Z. Xin
- Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - Y. Yang
- Department of Urology; First Hospital Affiliated to Chinese PLA General Hospital; Beijing China
| |
Collapse
|
46
|
Yu X, Wang K, Cao D, Wu Q, Guan R, Xu Y, Sun Y, Liu Z. Simple benzothiazole chemosensor for detection of cyanide anions via nucleophilic addition. Chem Heterocycl Compd (N Y) 2017. [DOI: 10.1007/s10593-017-2019-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|
47
|
Ma L, Yuan Z, Huang Z, Jin J, Cao D, Guan R, Chen Q, Sun X. Reversible regulating of crystal structures based on isomerization of phenylhydrazones. Chem Commun (Camb) 2017; 53:12630-12633. [DOI: 10.1039/c7cc06374a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reversible crystal transformation for phenylhydrazones1between the orthorhombic microporous1-Ecrystal and monoclinic herringbone1-Zcrystal induced by light and heating respectively.
Collapse
Affiliation(s)
- Lulu Ma
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P. R. China
| | - Zexing Yuan
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P. R. China
| | - Zhenguo Huang
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P. R. China
| | - Jingyi Jin
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P. R. China
| | - Duxia Cao
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P. R. China
| | - Ruifang Guan
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P. R. China
| | - Qifeng Chen
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P. R. China
| | - Xuan Sun
- Key Laboratory of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| |
Collapse
|
48
|
Hui Y, Yang B, Lei H, Guan R, Xin Z. 148 Therapeutic Effects of Adipose-Derived Stem Cells-Based Micro-Tissues on Erectile Dysfunction in Streptozotocin-Induced Diabetic Rats. J Sex Med 2017. [DOI: 10.1016/j.jsxm.2016.11.097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
49
|
Li M, Yang B, Guan R, Lei H, Xin Z. 394 Therapeutic Potential of Adipose-Derived Stem Cells-Based Micro-Tissues in a Rat Model of Stress Urinary Incontinence. J Sex Med 2017. [DOI: 10.1016/j.jsxm.2016.11.273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
50
|
Wang K, Feng W, Wang Y, Cao D, Guan R, Yu X, Wu Q. A coumarin derivative with benzothiazole Schiff's base structure as chemosensor for cyanide and copper ions. INORG CHEM COMMUN 2016. [DOI: 10.1016/j.inoche.2016.07.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|