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Feng K, Di Y, Han M, Yan W, Guo Y, Huai X, Wang Y. A photoelectrochemical aptasensor based on double Z-scheme α-Fe 2O 3/MoS 2/Bi 2S 3 ternary heterojunction for sensitive detection of circulating tumor cells. Front Bioeng Biotechnol 2024; 12:1372688. [PMID: 38515622 PMCID: PMC10956413 DOI: 10.3389/fbioe.2024.1372688] [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: 01/18/2024] [Accepted: 02/19/2024] [Indexed: 03/23/2024] Open
Abstract
A novel photoelectrochemical (PEC) aptasensor based on a dual Z-scheme α-Fe2O3/MoS2/Bi2S3 ternary heterojunction for the ultrasensitive detection of circulating tumor cells (CTCs) was developed. The α-Fe2O3/MoS2/Bi2S3 nanocomposite was prepared via a step-by-step route, and the photoproduced electron/hole transfer path was speculated by conducting trapping experiments of reactive species. α-Fe2O3/MoS2/Bi2S3-modified electrodes exhibited greatly enhanced photocurrent under visible light due to the double Z-scheme charge transfer process, which met the requirement of the PEC sensor for detecting larger targets. After the aptamer was conjugated on the photoelectrode through chitosan (CS) and glutaraldehyde (GA), when MCF-7 cells were presented and captured, the photocurrent of the PEC biosensing system decreased due to steric hindrance. The current intensity had a linear relationship with the logarithm of MCF-7 cell concentration ranging from 10 to 1×105 cells mL-1, with a low detection limit of 3 cell mL-1 (S/N = 3). The dual Z-scheme α-Fe2O3/MoS2/Bi2S3 ternary heterojunction-modified PEC aptasensor exhibited high sensitivity and excellent specificity and stability. Additionally, MCF-7 cells in human serum were determined by this PEC aptasensor, exhibiting great potential as a promising tool for clinical detection.
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Affiliation(s)
- Kai Feng
- The First Hospital of Qinhuangdao, Qinhuangdao, China
| | - Ya Di
- The First Hospital of Qinhuangdao, Qinhuangdao, China
| | - Meng Han
- The First Hospital of Qinhuangdao, Qinhuangdao, China
| | - Weitao Yan
- The First Hospital of Qinhuangdao, Qinhuangdao, China
| | - Yulin Guo
- The First Hospital of Qinhuangdao, Qinhuangdao, China
| | - Xiangqian Huai
- College of Food Science and Technology, Hebei Agricultural University, Baoding, China
| | - Yimin Wang
- The First Hospital of Qinhuangdao, Qinhuangdao, China
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Feng K, Di Y, Han M, Yan W, Wang Y. SORBS1 inhibits epithelial to mesenchymal transition (EMT) of breast cancer cells by regulating PI3K/AKT signaling and macrophage phenotypic polarization. Aging (Albany NY) 2024; 16:4789-4810. [PMID: 38451194 DOI: 10.18632/aging.205632] [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: 09/11/2023] [Accepted: 01/23/2024] [Indexed: 03/08/2024]
Abstract
This study aimed to explore the regulatory role of SORBS1 in macrophage polarization and the PI3K/AKT signaling pathway, as well as analyze its mechanism in epithelial-mesenchymal transition (EMT) of breast cancer cells. We established SORBS1-overexpressing and knockout cell lines and verified the effects of SORBS1 on cell viability, invasion, and migration by phenotyping experiments and assaying the expression of associated proteins. Furthermore, we established a breast cancer cell and macrophage co-culture system to validate the effect of SORBS1 expression on macrophage polarization and killing of breast cancer cells. Bioinformatics analysis showed that SORBS1 was lowly expressed in breast cancer (BRCA) samples and highly expressed in healthy tissues. Decreased SORBS1 expression was associated with poor prognosis, and the PI3K/AKT signaling pathway was the most significantly enriched pathway. In vitro experiments showed that high expression of SORBS1 inhibited the migration of breast cancer cells, as well as the PI3K/AKT signaling pathway, and blocked EMT of these cells. In addition, SORBS1 induced macrophage polarization to the M1-type and enhanced the killing effect on breast cancer cells in the co-culture system. In conclusion, we successfully verified that SORBS1 inhibits the invasion and migration of breast cancer cells, induces macrophage M1-type polarization, and blocks EMT of breast cancer cells, and it may act by regulating the PI3K/AKT signaling pathway.
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Affiliation(s)
- Kai Feng
- Department of Surgical, Hebei Medical University, Shijiazhuang 050011, Hebei, China
- Breast Surgery, The First Hospital of Qinhuangdao, Qinhuangdao 066600, Hebei, China
| | - Ya Di
- Department of Oncology, The First Hospital of Qinhuangdao, Qinhuangdao 066600, Hebei, China
| | - Meng Han
- Breast Surgery, The First Hospital of Qinhuangdao, Qinhuangdao 066600, Hebei, China
| | - Weitao Yan
- Breast Surgery, The First Hospital of Qinhuangdao, Qinhuangdao 066600, Hebei, China
| | - Yimin Wang
- Department of Surgical, Hebei Medical University, Shijiazhuang 050011, Hebei, China
- Department of General Surgery, The First Hospital of Qinhuangdao, Qinhuangdao 066600, Hebei, China
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Di Y, Li H, He C, Peng H. En-bloc transurethral resection vs. conventional transurethral resection for primary non-muscle invasive bladder cancer: A meta-analysis. Actas Urol Esp 2023; 47:309-316. [PMID: 36319557 DOI: 10.1016/j.acuroe.2022.08.012] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 04/28/2022] [Indexed: 06/05/2023]
Abstract
INTRODUCTION We performed a meta-analysis to evaluate the effect of en-bloc transurethral resection vs. conventional transurethral resection for primary non-muscle invasive bladder cancer. METHODS A systematic literature search up to January 2022 was done and 28 studies included 3714 primary non-muscle invasive bladder cancer subjects at the start of the study; 1870 of them were en-bloc transurethral resection, and 1844 were conventional transurethral resection for primary non-muscle invasive bladder cancer. We calculated the odds-ratio (OR) and mean-difference (MD) with 95% confidence-intervals (CIs) to evaluate the effect of en-bloc transurethral resection compared with conventional transurethral resection for primary non-muscle invasive bladder cancer by the dichotomous or continuous methods with random or fixed-effects models. RESULTS En-bloc transurethral resection had significantly lower twenty-four-month recurrence (OR: 0.63; 95%CI: 0.50-0.78; p < 0.001), catheterization-time (MD: -0.66; 95%CI: -1.02-[-0.29]; p < 0.001), length of hospital stay (MD: -0.95; 95%CI: -1.55-[-0.34]; p = 0.002), postoperative bladder irrigation duration (MD: -6.06; 95%CI: -9.45-[-2.67]; p < 0.001), obturator nerve reflex (OR: 0.08; 95%CI: 0.02-0.34; p = 0.03), and bladder perforation (OR: 0.14; 95%CI: 0.06-0.36: p < 0.001) and no significant difference in the 12-month-recurrence (OR: 0.79; 95%CI: 0.61-1.04; p = 0.09), the operation time (MD: 0.67; 95%CI: -1.92 to 3.25; p = 0.61), and urethral stricture (OR: 0.46; 95%CI: 0.14-1.47; p = 0.0.19) compared with conventional transurethral resection for primary non-muscle invasive bladder cancer subjects. CONCLUSIONS En-bloc transurethral resection had a significantly lower twenty-four-month recurrence, catheterization time, length of hospital stay, postoperative bladder irrigation duration, obturator nerve reflex, bladder perforation, and no significant difference in the twelve-month recurrence, operation time, and urethral stricture compared with conventional transurethral resection for primary non-muscle invasive bladder cancer subjects. Further studies are required.
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Affiliation(s)
- Y Di
- Department of Urology, Hongqi Hospital Affiliated to Mudanjiang Medical University, Heilongjiang, China
| | - H Li
- Department of Urology, Hongqi Hospital Affiliated to Mudanjiang Medical University, Heilongjiang, China
| | - C He
- Department of Urology, Hongqi Hospital Affiliated to Mudanjiang Medical University, Heilongjiang, China
| | - H Peng
- Department of Urology, The Fourth Hospital of Changsha, Hunan, China.
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Di Y, Zheng J, Zhao Y, Yang Z, Xie C, Yu J, Zheng Y, Gao L. Colorimetric/photothermal dual-mode sensing detection of ascorbic acid based on a Ag[i] ion/3,3',5,5'-tetramethylbenzidine (TMB) system. RSC Adv 2022; 12:36012-36017. [PMID: 36545108 PMCID: PMC9753968 DOI: 10.1039/d2ra06770f] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 12/03/2022] [Indexed: 12/23/2022] Open
Abstract
In this work, a novel strategy of colorimetric and photothermal dual-mode sensing determination of ascorbic acid (AA) based on a Ag+/3,3',5,5'-tetramethylbenzidine (TMB) system was developed. In this sensing system, Ag+ could oxidize TMB with a distinct color change from colorless to blue color, strong absorbance at 652 nm and a photothermal effect under 808 nm laser irradiation due to the formation of oxidized TMB (oxTMB). When AA was present, oxTMB was reduced accompanied by a change from blue to colorless, and a decrease in absorption peak intensity and the photothermal effect. AA concentration showed a negative linear correlation with the value of both the absorbance intensity at 652 nm and temperature in the range of 0.2-10 μM (A = -0.03C + 0.343 (R 2, 0.9887; LOD, 50 nM); ΔT = -0.57C + 8.453 (R 2, 0.997; LOD, 7.8 nM)). Based on this, a sensing approach for detection of AA was proposed with dual-mode and without the complicated synthesis of nanomaterials. The photothermal effect and colorimetric signal provided a dual-mode detection strategy for AA, overcoming the limitations of any single mode. This colorimetric and photothermal dual-mode detection has great potential in the detection of AA in clinical pharmaceuticals and the construction of portable and highly sensitive sensors.
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Affiliation(s)
- Ya Di
- The First Hospital in Qinhuangdao Affiliated to Hebei Medical UniversityQinhuangdao 066004China
| | - Jiyao Zheng
- The First Hospital in Qinhuangdao Affiliated to Hebei Medical UniversityQinhuangdao 066004China
| | - Yunwang Zhao
- The First Hospital in Qinhuangdao Affiliated to Hebei Medical UniversityQinhuangdao 066004China
| | - Zikai Yang
- The First Hospital in Qinhuangdao Affiliated to Hebei Medical UniversityQinhuangdao 066004China
| | - Changshun Xie
- The First Hospital in Qinhuangdao Affiliated to Hebei Medical UniversityQinhuangdao 066004China
| | - Jiahan Yu
- The First Hospital in Qinhuangdao Affiliated to Hebei Medical UniversityQinhuangdao 066004China
| | - Yue Zheng
- The First Hospital in Qinhuangdao Affiliated to Hebei Medical UniversityQinhuangdao 066004China
| | - Liming Gao
- The First Hospital in Qinhuangdao Affiliated to Hebei Medical UniversityQinhuangdao 066004China
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He W, Di Y, Jiang N, Liu Z, Chen Y. Graphene-Oxide Seeds Nucleate Strong and Tough Hydrogel-Based Artificial Spider Silk. ACTA PHYS-CHIM SIN 2022. [DOI: 10.3866/pku.whxb202204059] [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: 11/11/2022]
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Zheng Y, He S, Jin P, Gao Y, Di Y, Gao L, Wang J. Construction of multifunctional carboxymethyl cellulose nanohydrogel carriers based on near-infrared DNA-templated quantum dots for tumor theranostics. RSC Adv 2022; 12:31869-31877. [PMID: 36380926 PMCID: PMC9639241 DOI: 10.1039/d2ra05424h] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 10/24/2022] [Indexed: 11/09/2022] Open
Abstract
Multifunctional therapeutic platforms with targeted delivery, fast diagnosis, and efficient therapy could effectively reduce side effects and improve treatment in the clinical therapy of tumors. Near-infrared DNA-templated CdTeSe quantum dots (DNA-CdTeSe QDs) were developed as building blocks to construct a multifunctional carboxymethyl cellulose (CMC)-based nanohydrogel as a nanocarrier to address the challenges of serious side effects and precise treatment in cancer theranostics, including active tumor targeting, fluorescence tracking, controlled drug release, chemotherapy and gene regulation. Single-stranded DNA containing the complementarity sequence of miRNA and cystine, as co-crosslinkers, initiated hybridization between the DNA-CdTeSe QD-modified CMC chain with the anti-nucleolin aptamer DNA (AS1411)-modified CMC chain to form the hydrogels. DOX, as a model drug, was successfully incorporated into the hydrogels. The synthesized multifunctional hydrogel nanocarriers with an average diameter of 150 nm could be taken up through targeting and achieved the controlled release of DOX by triggering both glutathione (GSH) and miRNA in the tumor microenvironment. The CdTeSe QDs trapped in nanohydrogels acted as fluorophores for bioimaging in the diagnosis and treatment process. The proposed multifunctional delivery system provided a potential platform for tumor imaging and precise therapy. Multifunctional carboxymethyl cellulose nanohydrogel carriers for tumor theranostics.![]()
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Affiliation(s)
- Yue Zheng
- The First Hospital in Qinhuangdao Affiliated to Hebei Medical University, Qinhuangdao, China
| | - Shengquan He
- Hebei Key Laboratory of Applied Chemistry, Nano-biotechnology Key Lab of Hebei Province, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, China
| | - Penghui Jin
- Hebei Key Laboratory of Applied Chemistry, Nano-biotechnology Key Lab of Hebei Province, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, China
| | - Yabiao Gao
- Hebei Key Laboratory of Applied Chemistry, Nano-biotechnology Key Lab of Hebei Province, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, China
| | - Ya Di
- The First Hospital in Qinhuangdao Affiliated to Hebei Medical University, Qinhuangdao, China
| | - Liming Gao
- The First Hospital in Qinhuangdao Affiliated to Hebei Medical University, Qinhuangdao, China
| | - Jidong Wang
- Hebei Key Laboratory of Applied Chemistry, Nano-biotechnology Key Lab of Hebei Province, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, China
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Bi N, Hu X, Zhao K, Yang Y, Zhang L, E M, Cao J, Ge H, Zhu X, Zhao L, Di Y, Jiang W, Ran J, Zhang H, Zhang T, Shen W, Deng C, Hu C, Chen M, Wang L. P64.04 Hypo-Fractionated Versus Conventionally Fractionated Radiotherapy for Patients with LS-SCLC: An Open-Label, Randomized, Phase 3 Trial. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.675] [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: 11/29/2022]
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Zheng L, Xu H, Di Y, Chen L, Liu J, Kang L, Gao L. ELK4 promotes the development of gastric cancer by inducing M2 polarization of macrophages through regulation of the KDM5A-PJA2-KSR1 axis. J Transl Med 2021; 19:342. [PMID: 34372882 PMCID: PMC8353876 DOI: 10.1186/s12967-021-02915-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Accepted: 05/27/2021] [Indexed: 02/09/2023] Open
Abstract
Background We tried to elaborate the molecular mechanism of ETS-like transcription factor 4 (ELK4) affecting gastric cancer (GC) progression through M2 polarization of macrophages mediated by lysine-specific demethylase 5A (KDM5A)-Praja2 (PJA2)-kinase suppressor of ras 1 (KSR1) axis. Methods GC expression dataset was obtained from GEO database, and the downstream regulatory mechanism of ELK4 was predicted. Tumor-associated macrophages (TAMs) were isolated from GC tissues. The interaction among ELK4, KDM5A, PJA2 and KSR1 was analyzed by dual luciferase reporter gene, ChIP and Co-IP assays. The stability of KSR1 protein was detected by cycloheximide (CHX) treatment. After TAMs were co-cultured with HGC-27 cells, HGC-27 cell biological processes were assessed through gain- and loss-of function assays. Tumorigenicity was detected by tumorigenicity test in nude mice. Results In GC and TAMs, ELK4, KDM5A and KSR1 were highly expressed, while PJA2 was lowly expressed. M2 polarization of macrophages promoted the development of GC. ELK4 activated KDM5A by transcription and promoted macrophage M2 polarization. KDM5A inhibited the expression of PJA2 by removing H3K4me3 of PJA2 promoter, which promoted M2 polarization of macrophages. PJA2 reduced KSR1 by ubiquitination. ELK4 promoted the proliferative, migrative and invasive potentials of GC cells as well as the growth of GC xenografts by regulating KSR1. Conclusion ELK4 may reduce the PJA2-dependent inhibition of KSR1 by transcriptional activation of KDM5A to promote M2 polarization of macrophages, thus promoting the development of GC. Supplementary Information The online version contains supplementary material available at 10.1186/s12967-021-02915-1.
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Affiliation(s)
- Lei Zheng
- Department of Oncology, The First Hospital of Qinhuangdao, No. 258, Wenhua Road, Qinhuangdao, 066000, Hebei Province, People's Republic of China
| | - Hongmei Xu
- Department of Oncology, The First Hospital of Qinhuangdao, No. 258, Wenhua Road, Qinhuangdao, 066000, Hebei Province, People's Republic of China
| | - Ya Di
- Department of Oncology, The First Hospital of Qinhuangdao, No. 258, Wenhua Road, Qinhuangdao, 066000, Hebei Province, People's Republic of China
| | - Lanlan Chen
- Department of Oncology, The First Hospital of Qinhuangdao, No. 258, Wenhua Road, Qinhuangdao, 066000, Hebei Province, People's Republic of China
| | - Jiao Liu
- Department of Oncology, The First Hospital of Qinhuangdao, No. 258, Wenhua Road, Qinhuangdao, 066000, Hebei Province, People's Republic of China
| | - Liying Kang
- Department of Oncology, Tianjin Wuqing District People's Hospital, Tianjin, 301700, People's Republic of China
| | - Liming Gao
- Department of Oncology, The First Hospital of Qinhuangdao, No. 258, Wenhua Road, Qinhuangdao, 066000, Hebei Province, People's Republic of China.
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Ding X, Zhao L, Liu G, Zheng W, Shen J, Lee A, Di Y, Deraniyagala R, Stevens C, Li X, Tang S. PD-0902 Do we need a precise proton machine-specific delivery sequence to assess the interplay effect? Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)07181-4] [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: 11/29/2022]
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Ding X, Chang S, Liu G, Zhao L, Zheng W, Qin A, Di Y, Li X. PO-1842 Introduce a new rotational robust optimized Spot-scanning Proton Arc (SPArc) framework. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)08293-1] [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: 11/30/2022]
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Di Y, Zhao C, Bai Y, Wang D, Zhang F, Xu C, Xi C. Effects of blood pathological changes before TAI on pregnancy of dairy cows with anestrus and estrus. ARQ BRAS MED VET ZOO 2021. [DOI: 10.1590/1678-4162-12058] [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: 11/22/2022] Open
Abstract
ABSTRACT The objective of this study was to investigate the influence of plasma pathological changes before timed artificial insemination (TAI) on pregnancy of cows. The contents of estrogen (E2), progesterone (P4), glucose (Glu), selenium (Se), brain-derived neurotrophic factor (BDNF), and histamine (HIS) in plasma of 48 Holstein cows were measured before TAI. According to the estrus detection, the cows were divided into estrus (E) and anestrus (A) groups. After pregnancy testing at 28 d after TAI, two groups of E and A were divided into positive pregnancy of E group (EP+), negative pregnancy of E group (EP-), positive pregnancy of A group (AP+), and negative pregnancy of A group (AP-). The contents of E2, P4, Glu, Se, BDNF and hIS significantly differed among the four groups (P<0.01). The ROC analysis was used to determine the risk of negative pregnancy test (-) after TAI was increased when plasma E2 was less than 46.45 pmol/L in cows before TAI. The changes in E2, P4,hIS, Glu, and BDNF in the blood of natural estrus and natural anestrus cows affected the pregnancy after TAI. the level of E2 in plasma may be used to assess the risk of negative pregnancy after TAI.
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Affiliation(s)
- Y. Di
- Heilongjiang Bayi Agricultural University, China
| | - C. Zhao
- Heilongjiang Bayi Agricultural University, China
| | - Y. Bai
- Heilongjiang Bayi Agricultural University, China
| | - D. Wang
- Heilongjiang Bayi Agricultural University, China
| | - F. Zhang
- Heilongjiang Bayi Agricultural University, China
| | - C. Xu
- Heilongjiang Bayi Agricultural University, China
| | - C. Xi
- Heilongjiang Bayi Agricultural University, China; Heilongjiang Provincial Technology Innovation Center for Bovine Disease Control and Prevention, China
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Di Y, Wang P, Li C, Xu S, Tian Q, Wu T, Tian Y, Gao L. Design, Bioanalytical, and Biomedical Applications of Aptamer-Based Hydrogels. Front Med (Lausanne) 2020; 7:456. [PMID: 33195288 PMCID: PMC7642814 DOI: 10.3389/fmed.2020.00456] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 07/09/2020] [Indexed: 01/13/2023] Open
Abstract
Aptamers are special types of single-stranded DNA generated by a process called systematic evolution of ligands by exponential enrichment (SELEX). Due to significant advances in the chemical synthesis and biotechnological production, aptamers have gained considerable attention as versatile building blocks for the next generation of soft materials. Hydrogels are high water-retainable materials with a three-dimensional (3D) polymeric network. Aptamers, as a vital element, have greatly expanded the applications of hydrogels. Due to their biocompatibility, selective binding, and molecular recognition, aptamer-based hydrogels can be utilized for bioanalytical and biomedical applications. In this review, we focus on the latest strategies of aptamer-based hydrogels in bioanalytical and biomedical applications. We begin this review with an overview of the underlying design principles for the construction of aptamer-based hydrogels. Next, we will discuss some bioanalytical and biomedical applications of aptamer-based hydrogel including biosensing, target capture and release, logic devices, gene and cancer therapy. Finally, the recent progress of aptamer-based hydrogels is discussed, along with challenges and future perspectives.
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Affiliation(s)
- Ya Di
- Department of Respiratory Medicine, The First Hospital of Qinhuangdao, Qinhuangdao, China
| | - Ping Wang
- Department of Respiratory Medicine, Chinese People's Liberation Army General Hospital, Beijing, China
| | - Chunyan Li
- Department of Respiratory Medicine, Chinese People's Liberation Army General Hospital, Beijing, China
| | - Shufeng Xu
- Department of Respiratory Medicine, The First Hospital of Qinhuangdao, Qinhuangdao, China
| | - Qi Tian
- Department of Respiratory Medicine, The First Hospital of Qinhuangdao, Qinhuangdao, China
| | - Tong Wu
- Department of Respiratory Medicine, The First Hospital of Qinhuangdao, Qinhuangdao, China
| | - Yaling Tian
- Department of Respiratory Medicine, The First Hospital of Qinhuangdao, Qinhuangdao, China
| | - Liming Gao
- Department of Respiratory Medicine, The First Hospital of Qinhuangdao, Qinhuangdao, China
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Di Y, Guo LB, Ye JJ, Xu HY. [Retinal toxicity study of intravitreal ganciclovir in albino rabbit]. Zhonghua Yan Ke Za Zhi 2020; 56:279-285. [PMID: 32306620 DOI: 10.3760/cma.j.cn112142-20190506-00254] [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 elevated the retinal toxicity of intravitreal ganciclovir in albino rabbit eyes. Methods: Experimental study. Twenty-four New Zealand albino rabbits (forty-eight eyes) were divided into four groups by random. Three groups were prepared for ganciclovir experiment, named A, B, C. Each group received intravitreal injection ganciclovir dose at 400 μg/0.05 ml, 2 mg/0.05 ml and 5 mg/0.05 ml respectively. The other group named D served as a control accepted intravitreal injection 0.9% normal saline 0.1 ml. Before and after 1, 2 and 4 weeks, flicker full field electroretina gram (ERG) was recorded. After 1, 2 and 4 weeks light and electron microscopic tests were recorded for further toxicity study. Results: There was significant difference in amplitude of maximal combined response a wave in one week(χ(2)=8.319, P=0.04), and pairwise comparison the 5 mg group (140.50 μV) was significantly lower than the control group (165.00 μV) (χ(2)=-2.830, P=0.028). Maximal combined response b wave in four weeks(χ(2)=-10.626, P=0.014), and pairwise comparison the 5 mg group (261.50 μV) was significantly lower than the control group (398.00 μV) (χ(2)=-2.973, P=0.018). 30 Hz flicker response in one, two and four weeks(χ(2)=17.589, 8.225, 8.997, P=0.001, 0.042, 0.02), and pairwise comparison the 5 mg group (71.3μV, 106.00μV, 63.60μV) was significantly lower than the control group (118.50μV, 129.00μV, 116.50μV) (χ(2)=-4.142, -2.826, -2.713, P=0.000, 0.028, 0.040). There was no histologic retinal toxicity evidence of group 400 μg and control group observed by light microscopy in any stage of the study. Histologic changes of group 2 mg four week later, group 5 mg two and four week later include inner nuclear layer loose arranged, nuclear of ganglia were widened and outer plexiform layer stained less in four week later. By electron microscopic observation, the ultrastructure of retina changed to different degrees and became worse in each experimental group with significant mitochondrial swelling and hydropic changes were seen in the inner segments of photoreceptors, loosely arranged and disordered in the outer segment of photoreceptors four weeks later. Conclusions: The retinal function and morphology were normal in group 400 μg. Group 2 mg and 5 mg had retinal toxicity, and 5 mg was more severe. Therefore, the clinical application of ganciclovir in the treatment of acute retinal necrosis (ARN) should select the minimum effective dose to avoid the occurrence of retinal toxicity. (Chin J Ophthalmol, 2020, 56:279-285).
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Affiliation(s)
- Y Di
- Department of Ophthalmology, Peking Union Medical Academy of Medical Sciences, Beijing 100730, China
| | - L B Guo
- Department of Ophthalmology, Beijing Tsinghua Changgung Hospital, Beijing 102218, China
| | - J J Ye
- Department of Ophthalmology, Peking Union Medical Academy of Medical Sciences, Beijing 100730, China
| | - H Y Xu
- Department of Ophthalmology, Peking Union Medical Academy of Medical Sciences, Beijing 100730, China
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Di Y, Lu K, Tian Y, Liu Y, Zhao Y, Zheng Y. Preparation and growth mechanism of CdS quantum dots in octadecene/glycerol two-phase systems. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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Di Y, Ye JJ, Li DH. [The relationship between optical coherence tomography performance and visual acuity of acute retinal necrosis]. Zhonghua Yan Ke Za Zhi 2019; 54:369-374. [PMID: 29747369 DOI: 10.3760/cma.j.issn.0412-4081.2018.05.011] [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 analyze the relationship between optical coherence tomography(OCT) performance and visual acuity of patients with acute retinal necrosis (ARN). Methods: Retrospective analysis was performed on the patients diagnosed with ARN at the ophthalmology department of Peking union hospital during October 2011 and May 2016. Fourteen patients (15 eyes), 9 males and 5 females, whose anterior and posterior inflammation disappeared and the retinal necrosis lesion in the fundus of the eye subsided were included. The mean age was (41.6±12.2) years. All patients underwent careful examinations including best corrected visual acuity (BCVA), slit-lamp microscope, indirect ophthalmoscope, color fundus picture, fundus fluorescein angiography (FFA) and OCT (results of their last consultations). Results: BCVA: 8 eyes were increased, 2 eyes were unchanged and 5 eyes were decreased at the last visit; light perception (LP) 1 eye, finger count (FC) 1 eye, 3 eyes of 0.01 to 0.1, 6 eyes of 0.15 to 0.25. The inflammatory reaction in the anterior segment of 14 eyes disappeared, while the inflammatory reaction of the remaining 1 eye was relieved. The fundus lesions of all 15 eyes disappeared. According to OCT results: five eyes (5/15) exhibited normal macula area, among the 5 eyes, 4 eyes are of 0.15 to 0.25 visual acuity, and 1 eye is of 0.5 visual acuity;macular epiretinal membrane is present in three eyes (3/15), of which the visual acuity is 0.02, 0.25 and 0.3 respectively macula edema is present in three eyes (3/15), among the 3 eyes, 1 eye (visual acuity of 0.01)showed thickening of neurosensory retina, cystoid change of fovea and several fluid dark areas, the other 2 eyes (visual acuity of 0.02 and 0.5 respectively) showed small diffuse fluid dark area in the neurosensory retina;atrophy of neurosensory retina and absence of IS/OS was found in four eyes (4/15), among the 4 eyes, the visual acuity of 3 is below 0.01, and the other 1 eye is of 0.08 visual acuity. Conclusions: The OCT performance of stationary phase of ARN tends to be positively correlated with the visual acuity of patients. The prognosis of visual acuity of the patients whose OCT results showed atrophy of neurosensory retina and absence of IS/OS is poor. (Chin J Ophthalmol, 2018, 54: 369-374).
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Affiliation(s)
- Y Di
- Department of Ophthalmology, Peking Union Medical Academy of Medical Sciences, Beijing 100730, China
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Di Y, Ye JJ. [Research progress on the diagnosis and treatment of acute retinal necrosis]. Zhonghua Yan Ke Za Zhi 2019; 54:306-311. [PMID: 29747360 DOI: 10.3760/cma.j.issn.0412-4081.2018.04.017] [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
Acute retinal necrosis is an uncommon but devastating and potentially blinding ophthalmopathy featured with unfavorable prognosis as the lesions tend to develop rapidly in a circumferential way in few days. Therefore timely diagnosis and early treatment are of great significance. The polymerase chain reaction test on intraocular fluid can improve specificity and sensitivity of the etiological detection for acute retinal necrosis. Etiology results included in the diagnostic criteria is favorable for etiological diagnosis. Current treatment for acute retinal necrosis is generally based on systemic antiviral therapy, and supported by hormone and antithrombotic drugs, while surgical treatment should be considered when the disease progresses. This article reviews the research progress on the diagnosis and treatment of acute retinal necrosis in an effort to improve the diagnosis and treatment performance of acute retinal necrosis. (Chin J Ophthalmol, 2018, 54: 306-311).
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Affiliation(s)
- Y Di
- Department of ophthalmology, Peking Union Medical Academy of Medical Sciences, Beijing 100730, China
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Abstract
Sympathetic ophthalmia (SO) is a rare, bilateral, non-necrotizing, granulomatous uveitis that usually occurs after open ocular injury or intraocular surgery. The pathophysiology is not clearly understood, but generally SO is an immediate hypersensitivity mediated by T lymphocytes which are related to ocular tissue antigens. The main histopathological features are granulation tissues composed of lymphocytes, macrophages and multinucleated giant cells. The clinical manifestations are different from person to person, which might be mild or severe. Although it could be presented with anterior uveitis, intermediate uveitis and posterior uveitis, panuveitis is the most common sign. The ophthalmic examinations, such as fundus fluorescein angiography, optical coherence tomography and B-scan, could be used to observe the patients' conditions and monitor the therapeutic effect. The main treatment of SO is medical therapy with corticosteroids, immunomodulators and biomodulators. Topical drug administration, including intravitreal injection of triamcinolone acetonide and implantation of a fluocinolone acetonide implant, can be considered. There is controversy about whether enucleation or evisceration is more appropriate and when the procedure should be done. The prognosis of SO could be poor. SO is liable to deteriorate and may lead to blindness. This article reviews the etiology, mechanisms, histopathology, clinical characteristics, diagnosis and treatment of SO. (Chin J Ophthalmol, 2017, 53:778-782).
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Affiliation(s)
- Y Di
- Department of Ophthalmology, Peking Union Medical Academy of Medical Sciences, Beijing 100730, China
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Zheng Y, Zhao Y, Di Y, He L, Liao S, Li D, Liu X. In vitro selection of DNA aptamers for the development of chemiluminescence aptasensor for neuron-specific enolase (NSE) detection. RSC Adv 2019; 9:15513-15520. [PMID: 35514829 PMCID: PMC9064317 DOI: 10.1039/c9ra00785g] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 05/09/2019] [Indexed: 12/02/2022] Open
Abstract
Neuron-specific enolase (NSE) is one of the most commonly used serum tumor biomarker in clinical practice for small cell lung cancer screening, early diagnosis, evaluation of therapeutic efficacy and prognosis. In this study, we obtained DNA aptamers with great affinity and selectivity to NSE via subtractive SELEX approach. After 10 rounds, three candidate aptamers were successfully selected and identified. Their affinities were measured by surface plasmon resonance. Apt-5 aptamer with high binding affinity and good specificity were obtained, which had the dissociation constant (K D) values of 12.26 nM. In addition, electrophoretic mobility shift assay (EMSA) experiment also further indicated that the Apt-5 had a highly specific affinity to NSE without binding to HSA. The circular dichroism (CD) analysis revealed that the three aptamers formed stable B-form, stem-loop conformations. The selected aptamers were used to construct a chemiluminescence (CL) aptasensor biosensing platform to detect NSE from actual serum samples. Experimental results confirmed that the CL immunosensing platform had good sensitivity with detection limits of 1-100 ng mL-1. The results demonstrated that our obtained the Apt-5 aptsensor was highly specific in the detection of NSE in serum samples. The detection limit was 0.1 ng mL-1, which was lower than the 0.25 ng mL-1 limit of the ELISA used at the hospital. Moreover, the aptasensor can contribute to better detection of small cell lung cancer (SCLC).
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Affiliation(s)
- Yue Zheng
- The First Hospital of Qinhuangdao Affiliated to Hebei Medical University Qinhuangdao 066000 China +86-0335-590-8121
| | - Yunwang Zhao
- The First Hospital of Qinhuangdao Affiliated to Hebei Medical University Qinhuangdao 066000 China +86-0335-590-8121
| | - Ya Di
- The First Hospital of Qinhuangdao Affiliated to Hebei Medical University Qinhuangdao 066000 China +86-0335-590-8121
| | - Lei He
- College of Environment & Chemical Engineering, Yanshan University Qinhuangdao 066004 China
| | - Shiqi Liao
- College of Life Sciences, Lanzhou University Lanzhou 730000 China
| | - Dongdong Li
- College of Life Sciences, Lanzhou University Lanzhou 730000 China
| | - Xiaofei Liu
- Key Laboratory of Polymer Material of Gansu Province, Institute of Polymer, Northwest Normal University Lanzhou 730070 China
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Zhou HY, Di Y, Ye JJ, Xu HY. [The ocular manifestations of human immunodeficiency virus and syphilis coinfection]. Zhonghua Yan Ke Za Zhi 2019; 55:267-272. [PMID: 30982288 DOI: 10.3760/cma.j.issn.0412-4081.2019.04.008] [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 investigate the ocular manifestations of human immunodeficiency virus (HIV) and syphilis coinfection. Methods: A retrospective analysis of the ocular manifestations was carried out in 27 patients (54 eyes) diagnosed as syphilis and HIV coinfection by the Department of Infectious Medicine in Peking Union Medical College Hospital during the years of 2006-2017. The research included 26 males and 1 female, aging from 24 to 76 years old, with a mean age of 40.40±12.94 years old. Ocular anterior segments were examined with slit-lamp microscope. Fundus examinations were conducted with papillary dilation, fundus photography. Results: At the first visit, there were 2 eyes without light perception, 4 eyes with light perception, 1 eye with hand movement, 1 eye with finger counting, 2 eyes with 0.01-0.09 eyesight, 8 eyes with 0.1-0.2 eyesight, 12 eyes with 0.25-0.4 eyesight, 15 eyes with 0.5-0.9 eyesight, 9 eyes with 1.0-1.5 eyesight. Among the 27 patients (54 eyes) coinfected with HIV and syphilis, keratic precipitates were identified in 20 eyes, aqueous flare positive in 20 eyes, float positive in 15 eyes, and iris posterior synechias in 7 eyes. Nineteen eyes were diagnosed as syphilis uveitis, including 2 eyes with syphilis anterior uveitis and 17 eyes with syphilis panuveitis, among which, vitreous inflammatory opacity was observed in all 19 eyes, disk atrophy in 2 eyes, optic edema in 1 eye, vitreous hemorrhage in 1 eye, retinal detachment in 2 eyes, retinal hemorrhage and white vein in 1 eye. In addition, 8 eyes were diagnosed as HIV retinopathy, all manifested as cotton-wool spot. Among the 8 eyes, 4 were diagnosed as cytomegalovirus retinitis, 3 showed retinal yellow-white lesions, and 1 was in late phase which showed retinal pigmentation. The incidence of both HIV and syphilis coinfection patients and male homosexuality population increased. The most common ocular manifestation of HIV and syphilis coinfection was syphilis panuveitis. Six patients first visited the Department of Ophthalmology, and were then diagnosed as HIV and syphilis coinfection. Conclusions: The ocular manifestations of HIV and syphilis coinfection are diversified, which can be manifested as fundus necrotic lesions as well as anterior and posterior inflammatory. For HIV positive patients, syphilis serologic test should be routinely performed. The same, syphilis positive patients should be tested for HIV serum antibodies, in order to improve the diagnosis level of HIV/syphilis coinfection and give timely etiological treatment, which is of vital importance for saving visual acuity. (Chin J Ophthalmol, 2019, 55:267-272).
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Affiliation(s)
- H Y Zhou
- Department of Ophthalmology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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Gao LM, Zheng Y, Wang P, Zheng L, Zhang WL, Di Y, Chen LL, Yin XB, Tian Q, Shi SS, Xu SF. Tumor-suppressive effects of microRNA-181d-5p on non-small-cell lung cancer through the CDKN3-mediated Akt signaling pathway in vivo and in vitro. Am J Physiol Lung Cell Mol Physiol 2019; 316:L918-L933. [PMID: 30628487 DOI: 10.1152/ajplung.00334.2018] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The involvement of several microRNAs (miRs) in the initiation and development of tumors through the suppression of the target gene expression has been highlighted. The aberrant expression of miR-181d-5p and cyclin-dependent kinase inhibitor 3 (CDKN3) in non-small-cell lung cancer (NSCLC) was then screened by microarray analysis. In the present study, we performed a series of in vivo and in vitro experiments for the purpose of investigating their roles in NSCLC and the underlying mechanism. There was a high expression of CDKN3, whereas miR-181d-5p was downregulated in NSCLC. Quantitative RT-PCR, Western blot analysis, and dual-luciferase reporter gene assay further identified that CDKN3 could be negatively regulated by miR-181d-5p. Moreover, the upregulation of miR-181d-5p or silencing of CDKN3 could inactivate the Akt signaling pathway. A549 with the lowest miR-181d-5p and H1975 with the highest CDKN3 among the five NSCLC cell lines (H1299, A549, H1975, NCI-H157, and GLC-82) were adopted for in vitro experiments, in which expression of miR-181d-5p and CDKN3 was altered by transfection of miR-181d-5p mimic/inhibitor or siRNA-targeting CDKN3. Afterwards, cell proliferation, apoptosis, invasion, migration, and angiogenesis, as well as epithelial-mesenchymal transition (EMT), were evaluated, and tumorigenicity was assessed. In addition, an elevation in miR-181d-5p or depletion in CDKN3 led to significant reductions in proliferation, invasion, migration, angiogenesis, EMT, and tumorigenicity of NSCLC cells, coupling with increased cell apoptosis. In conclusion, this study highlights the tumor-suppressive effects of miR-181d-5p on NSCLC via Akt signaling pathway inactivation by suppressing CDKN3, thus providing a promising therapeutic strategy for the treatment of NSCLC.
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Affiliation(s)
- Li-Ming Gao
- Department of Oncology, the First Hospital of Qinhuangdao , Qinhuangdao , People's Republic of China
| | - Yue Zheng
- Department of Gastroenterology, the First Hospital of Qinhuangdao , Qinhuangdao , People's Republic of China
| | - Ping Wang
- Department of Respiratory, Chinese PLA General Hospital , Beijing , People's Republic of China
| | - Lei Zheng
- Department of Oncology, the First Hospital of Qinhuangdao , Qinhuangdao , People's Republic of China
| | - Wen-Li Zhang
- Department of Imaging, the First Hospital of Qinhuangdao , Qinhuangdao , People's Republic of China
| | - Ya Di
- Department of Oncology, the First Hospital of Qinhuangdao , Qinhuangdao , People's Republic of China
| | - Lan-Lan Chen
- Department of Oncology, the First Hospital of Qinhuangdao , Qinhuangdao , People's Republic of China
| | - Xiao-Bo Yin
- Department of Respiratory, the First Hospital of Qinhuangdao , Qinhuangdao , People's Republic of China
| | - Qi Tian
- Department of Respiratory, the First Hospital of Qinhuangdao , Qinhuangdao , People's Republic of China
| | - Shan-Shan Shi
- Department of Respiratory, the First Hospital of Qinhuangdao , Qinhuangdao , People's Republic of China
| | - Shu-Feng Xu
- Department of Respiratory, the First Hospital of Qinhuangdao , Qinhuangdao , People's Republic of China
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Zheng Y, Zhao Y, Di Y, Xiu C, He L, Liao S, Li D, Huang B. DNA aptamers from whole-serum SELEX as new diagnostic agents against gastric cancer. RSC Adv 2019; 9:950-957. [PMID: 35517584 PMCID: PMC9059574 DOI: 10.1039/c8ra08642g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 10/19/2018] [Accepted: 12/10/2018] [Indexed: 12/20/2022] Open
Abstract
Gastric cancer is still among the leading causes of cancer deaths worldwide. Despite the improvements in diagnostic methods, the status of early detection has not been achieved so far. Early diagnosis of gastric cancer may significantly improve the cure rate of patients. Therefore, a new diagnostic method is needed. In this study, subtractive SELEX was performed to screen gastric cancer serum-specific DNA aptamers by using gastric cancer serum and normal serum as the target and negative serum, respectively. Four highly specific aptamers generated for gastric cancer serum, Seq-3, Seq-6, Seq-19 and Seq-54, were developed using whole-serum subtractive SELEX technology with Kd of 128 ± 26.3 nM, 149 ± 23.6 nM, 232 ± 44.2 nM, 202 ± 25.6 nM, respectively. These generated aptamers showed higher specificities toward their target serum by differentiating normal serum but closely related other cancer serums. The selected four high affinity DNA aptamers were further applied to the development based on qPCR method for the early detection of gastric cancer. In addition, we performed MALDI-TOF MS followed by secondary peptide sequencing MS analysis for the identification of the aptamer binding proteins. Among these potential biomarkers, APOA1, APOA4, PARD3, Importin subunit alpha-1 showed a relatively high score probability. Therefore, these four ssDNA aptamers generated in our study could be a promising molecular probe for gastric cancer diagnosis. Gastric cancer is still among the leading causes of cancer deaths worldwide.![]()
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Affiliation(s)
- Yue Zheng
- The First Hospital of Qinhuangdao
- Qinhuangdao
- China
| | - Yunwang Zhao
- The First Hospital of Qinhuangdao
- Qinhuangdao
- China
| | - Ya Di
- The First Hospital of Qinhuangdao
- Qinhuangdao
- China
| | - Chenlin Xiu
- Central Pharmaceutical Research Institute
- Shijiazhuang Pharmaceutical Group
- Shijiazhuang
- China
| | - Lei He
- College of Environment &Chemical Engineering
- Yanshan University
- Qinhuangdao
- China
| | - Shiqi Liao
- College of Life Sciences
- Lanzhou University
- Lanzhou
- China
| | - Dongdong Li
- College of Life Sciences
- Lanzhou University
- Lanzhou
- China
| | - Baihai Huang
- College of Environment &Chemical Engineering
- Yanshan University
- Qinhuangdao
- China
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Zheng Y, Wang X, He S, Gao Z, Di Y, Lu K, Li K, Wang J. Aptamer-DNA concatamer-quantum dots based electrochemical biosensing strategy for green and ultrasensitive detection of tumor cells via mercury-free anodic stripping voltammetry. Biosens Bioelectron 2018; 126:261-268. [PMID: 30445301 DOI: 10.1016/j.bios.2018.09.076] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 09/20/2018] [Accepted: 09/20/2018] [Indexed: 01/04/2023]
Abstract
A electrochemical biosensing strategy was developed for green and ultrasensitive detection of tumor cells by combining aptamer-DNA concatamer-CdTe quantum dots (QDs) signal amplification probe with mercury-free anodic stripping voltammetry (ASV). First, aptamer-DNA concatamer- CdTe QDs probes were designed by DNA hybridization and covalent assembling, which contained specific recognition of aptamer and signal amplification incorporating the DNA concatamer with QDs. Meanwhile, the capture electrode, glassy carbon electrode (GCE)/Graphene oxide (GO)/Polyaniline (PANI) / Glutaraldehyde (GA) / concanavalin A (Con A) was fabricated by a layer-by-layer assembling technique. K562 cells, as model cancer cells were detected to demonstrate the feasibility of this sensing strategy. Then, novel composite, graphene (GR)- Poly diallyldimethylammonium chloride (PDDA)/L-Cysteine (L- Cys), was explored in ASV which replaced mercury electrodes using for determination of tumor cells. The proposed electrochemical biosensor showed high sensitivity with the detection limit of 60 cells mL-1. More importantly, this novel design of signal amplification probes and the exploration of new composites in mercury-free ASV analysis would provide a promising method for ultrasensitive biosensor preparation and green electrochemical detection of tumor cells.
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Affiliation(s)
- Yue Zheng
- The First Hospital in Qinhuangdao Affiliated to Hebei Medical University, Qinhuangdao 066004, China.
| | - Xiaoyu Wang
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Shengquan He
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Zehua Gao
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Ya Di
- The First Hospital in Qinhuangdao Affiliated to Hebei Medical University, Qinhuangdao 066004, China
| | - Kunling Lu
- The First Hospital in Qinhuangdao Affiliated to Hebei Medical University, Qinhuangdao 066004, China
| | - Kun Li
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Jidong Wang
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
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Ding X, Li X, Zhou J, Stevens C, Sura K, Chinnaiyan P, Grills I, Di Y, Kabolizadeh P. PO-0916: Explore the future of of proton hypo-fractionation treatment - Spot-scanning Proton Arc therapy. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)31226-x] [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: 11/26/2022]
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Yu L, Di Y, Xin L, Ren Y, Liu X, Sun X, Zhang W, Yao Z, Yang J. SND1 acts as a novel gene transcription activator recognizing the conserved Motif domains of Smad promoters, inducing TGFβ1 response and breast cancer metastasis. Oncogene 2017; 36:3903-3914. [DOI: 10.1038/onc.2017.30] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 12/29/2016] [Accepted: 12/30/2016] [Indexed: 02/06/2023]
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Abstract
Optical coherence tomography angiography (OCTA) is a new technology of angiography in recent years. It has advantages of the optical coherence tomography (OCT), moreover, it can hierarchically observe the vascular morphology of the retina and choroid. By using the pseudo-color, abnormal vascular structure can be distinguished from normal vascular structure of the retina. With the fusion of the OCTA image and the regular OCT image, the structure and blood flow information can be obtained at the same time. This technology provides another method of examination for clinical ophthalmology, especially for the diagnosis of retinal diseases. This review will analyze and summarize the operating principle of OCTA, its application in ophthalmology, as well as its advantages and limitations. (Chin J Ophthalmol, 2017, 53: 65-72).
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Affiliation(s)
- Y Di
- Department of ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
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Di Y, Meng Q, Yang H, Li K, Cao L, Shi M, Fu Z, Di H. Antitumor activity of tanshinone and its nanoparticles on U14 cervical carcinoma-bearing mice. Nanobiomedicine (Rij) 2016; 3:1849543516673446. [PMID: 29942389 PMCID: PMC5998259 DOI: 10.1177/1849543516673446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Accepted: 09/14/2016] [Indexed: 11/16/2022] Open
Abstract
In this study, tanshinone was extracted from Salvia miltiorrhiza. To improve the utilization and the dissolution of the drug, the tanshinone extractions were prepared at a pharmaceutical nanoscale and in the nanometer range of 100–200 nm. Then, the rate of tumor inhibition and the activity of antioxidant system and the thymus/spleen indices were investigated to find the antitumor effect of nanoparticles of tanshinone in cervical carcinoma-bearing mice. Our data suggest that tanshinone inhibits cervical tumor growth and the rates of tumor inhibition of all drug groups were more than 45%. The highest rate was 70.88% in the high dose of nanoscale tanshinone group. The activities of superoxide dismutase were higher in drug groups than in the model control group, and the concentrations of malondialdehyde were significantly lower. These findings suggested that tanshinone enhance the superoxide dismutase activity of the mice and decrease the malondialdehyde content. It may be one of the mechanisms of antitumor effect of tanshinone. The thymus index and spleen index were higher than normal control or model control. These data suggested that tanshinone also enhanced the immune system of mice.
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Affiliation(s)
- Ya Di
- Oncology department, The First Hospital of Qinhuangdao, Qinhuangdao, People's Republic of China
| | - Qingjie Meng
- Oncology department, Fengrun Hospital of Tangshan, Tangshan, People's Republic of China
| | - Hongwei Yang
- Oncology department, Lulong County Hospital of Qinhuangdao, Qinhuangdao, People's Republic of China
| | - Kun Li
- Department of Biological Engineering, College of Environment and Chemical Engineering, Yanshan University, Qinhuangdao, People's Republic of China
| | - Liyan Cao
- Oncology department, The First Hospital of Qinhuangdao, Qinhuangdao, People's Republic of China
| | - Ming Shi
- Department of Biological Engineering, College of Environment and Chemical Engineering, Yanshan University, Qinhuangdao, People's Republic of China
| | - Zhanzhao Fu
- Oncology department, The First Hospital of Qinhuangdao, Qinhuangdao, People's Republic of China
| | - Hao Di
- School of economics, Nankai University, Weijin Road, Tianjin, People's Republic of China.,Research department, Zhongde Securities, Beijing, People's Republic of China
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Liu X, Ren G, Xia T, Di Y, Chang D. Dosimetric Predictors for Gastrointestinal Toxicity in Pancreatic Cancer After Hypofractionated Radiation Therapy. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.929] [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: 10/22/2022]
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28
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Yang F, Di Y, Jin C, Zhong L, Fu DL. Education and imaging. Gastroenterology: Juxtapapillary diverticulum perforation after endoscopic retrograde cholangiopancreatography. J Gastroenterol Hepatol 2015; 30:651. [PMID: 25776958 DOI: 10.1111/jgh.12854] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- F Yang
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
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Li L, Tanaree D, Di Y, Estill C, Duringer J, Blythe L, Galen A, Livesay S, Craig A. Bovine hepatic differential gene expression in response to perennial ryegrass staggers. WORLD MYCOTOXIN J 2015. [DOI: 10.3920/wmj2014.1749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
>‘Perennial ryegrass staggers’ is a neurological condition characterised by muscular tremors and ataxia in livestock that ingest the indole diterpene lolitrem B from endophyte-infected perennial ryegrass. While the neurotoxic mechanism of action of ryegrass staggers has been defined, little is known about metabolic and other molecular processes that lolitrem B may affect in livestock. The objective of this study was to characterise differential gene expression in the liver of animals fed lolitrem B-containing feed over an extended period of time. Eighteen steers were fed one of three rations (n=6/group) containing lolitrem B (247, 1,554 or 2,256 μg/kg (dry matter basis)) over 64 days in a double-blind study. Microarray and confirmatory qPCR were performed to evaluate the hepatic gene expression profile from biopsies taken on days 0 and 64. Widespread perturbation of gene expression was observed in all groups receiving lolitrem B, with a total of 152 differential genes identified (false discovery rate ≤0.05). This suggests that chronic exposure to lolitrem B, even at levels below the current threshold of toxicity (2,000 μg/kg lolitrem B), can perturb many genes, biological processes and pathways. Gene ontology and Kyoto Encyclopedia of Genes and Genomes pathway analyses indicated that many of these genes were categorised under lipid/steroid biosynthesis/metabolism and oxidation-reduction. Specifically, genes involved in the biosynthesis pathway of ceramide, a sphingolipid molecule (ACSS2, LASS6 and SCD) and changes in neurosignaling through alteration of nitric oxide synthase activity (ARG1 and GPX4) were up-regulated. Future work should focus on the overall balance between ceramide and its metabolites and antioxidants/oxidants in a variety of body matrices in animals with perennial ryegrass staggers, to determine how these compounds contribute to the overall etiology of this disease.
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Affiliation(s)
- L. Li
- Department of Environmental and Molecular Toxicology, Oregon State University (OSU), Oak Creek Building, Corvallis, OR 97331, USA
| | - D.D. Tanaree
- Department of Microbiology, OSU, 139 Oak Creek Building, Corvallis, OR 97331, USA
| | - Y. Di
- Department of Statistics, OSU, 44 Kidder Hall, Corvallis, OR 97331, USA
| | - C.T. Estill
- College of Veterinary Medicine, OSU, 105 Magruder Hall, Corvallis, OR 97331, USA
| | - J.M. Duringer
- Department of Environmental and Molecular Toxicology, Oregon State University (OSU), Oak Creek Building, Corvallis, OR 97331, USA
| | - L.L. Blythe
- College of Veterinary Medicine, OSU, 105 Magruder Hall, Corvallis, OR 97331, USA
| | - A. Galen
- College of Veterinary Medicine, OSU, 105 Magruder Hall, Corvallis, OR 97331, USA
| | - S. Livesay
- College of Veterinary Medicine, OSU, 105 Magruder Hall, Corvallis, OR 97331, USA
| | - A.M. Craig
- College of Veterinary Medicine, OSU, 105 Magruder Hall, Corvallis, OR 97331, USA
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Peng Y, Fu ZZ, Guo CS, Zhang YX, Di Y, Jiang B, Li QW. Effects and Mechanism of Baicalin on Apoptosis of Cervical Cancer HeLa Cells I n -v itro. Iran J Pharm Res 2015; 14:251-61. [PMID: 25561931 PMCID: PMC4277638] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The objective of this study was to observe the apoptosis-inducing effect and mechanism of baicalin on human cervical cancer HeLa cells. The inhibitory effect of baicalin on the growth of HeLa cells was measured by MTT assay, and cell proliferation and migration was analyzed by cell scratch assay. Morphological changes of apoptotic cells were viewed by the light microscope and electron microscope, and cell growth arrest was confirmed by flow cytometry. Moreover, Western blot was used for investigating the expression of apoptosis related proteins; spectrophotometry was used to examine Caspase-3 activation. Our results showed that baicalin could inhibit the proliferation of HeLa Cells via induction of apoptosis in a time and dose-dependent manner (P<0.01). Apoptotic signaling induced by baicalin was characterized by up-regulating Bax, Fas, FasL and Caspase-8 protein expression, and down-regulating of Bcl-2 protein expression. These results indicated that baicalin-induced apoptosis involved activation Caspase-3 in HeLa cells through the intracellular mitochondrial pathway and the surface death receptor pathway.
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Affiliation(s)
- Yong Peng
- Department of Biomedical Engineering, College of Electrical Engineering, Yanshan University, Qinhuangdao, 066004, China. ,Department of Biological Engineering, College of Environment, Chemical Engineering, Yanshan University, Qinhuangdao, 066004, China.
| | - Zhan-zhao Fu
- The First Hospital of Qinhuangdao Town, Qinhuangdao, 066100, China
| | - Cong-Shan Guo
- Department of Biomedical Engineering, College of Electrical Engineering, Yanshan University, Qinhuangdao, 066004, China.
| | - Yan-Xia Zhang
- Department of Biomedical Engineering, College of Electrical Engineering, Yanshan University, Qinhuangdao, 066004, China.
| | - Ya Di
- The First Hospital of Qinhuangdao Town, Qinhuangdao, 066100, China
| | - Bin Jiang
- Department of Biomedical Engineering, College of Electrical Engineering, Yanshan University, Qinhuangdao, 066004, China.
| | - Qing-Wang Li
- Department of Biological Engineering, College of Environment, Chemical Engineering, Yanshan University, Qinhuangdao, 066004, China. ,Department of Animal Science, Northwest Agriculture and Forestry University, Yangling, 712100, China. ,
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Zhang JH, Di Y, Wu LY, He YL, Zhao T, Huang X, Ding XF, Wu KW, Fan M, Zhu LL. 5-HMF prevents against oxidative injury via APE/Ref-1. Free Radic Res 2014; 49:86-94. [DOI: 10.3109/10715762.2014.981260] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Peng Y, Guo CS, Li PX, Fu ZZ, Gao LM, Di Y, Ju YK, Tian R, Xue JJ. Immune and Anti-oxidant Functions of Ethanol Extracts of Scutellaria baicalensis Georgi in Mice Bearing U14 Cervical Cancers. Asian Pac J Cancer Prev 2014; 15:4129-33. [DOI: 10.7314/apjcp.2014.15.10.4129] [Citation(s) in RCA: 15] [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: 11/10/2022] Open
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33
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Di Y, Seymour L, Fisher K. Activity of a group B oncolytic adenovirus (ColoAd1) in whole human blood. Gene Ther 2014; 21:440-3. [PMID: 24553347 DOI: 10.1038/gt.2014.2] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Revised: 11/11/2013] [Accepted: 11/28/2013] [Indexed: 01/02/2023]
Abstract
Intravenous (i.v.) delivery of therapeutic viruses to human patients exposes virus particles to the potentially neutralising environment of the human bloodstream, where many components of the innate and adaptive immune system provide a formidable barrier to virus infection of target cells. Here we assess the haemocompatibility of ColoAd1, an oncolytic adenovirus currently undergoing clinical assessment for treatment of disseminated cancer by i.v. delivery. Compared with the commonly used serotype Ad5, ColoAd1 (which has a capsid derived from Ad11p) showed only minor inhibition of oncolytic activity by pooled human serum or washed human blood cells, with the amount of ColoAd1 required to kill cancer cells in vitro (the IC50) increasing <10-fold. However, some virus-blood interactions are concentration- and context-dependent, requiring study in whole, undiluted, human blood. ColoAd1 showed <50-fold increases in the IC50 in whole blood from most donors, whereas the activity of Ad5 was ablated. Extrapolating these findings to the clinical situation indicates that ColoAd1 would 'breakthrough' neutralisation in some patients receiving as few as 10(10) ColoAd1 particles i.v., and in most patients receiving doses of 10(12) or above, well within the achievable dose range.
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Affiliation(s)
- Y Di
- Department of Oncology, ORCRB, Roosevelt Drive, University of Oxford, Oxford, UK
| | - L Seymour
- Department of Oncology, ORCRB, Roosevelt Drive, University of Oxford, Oxford, UK
| | - K Fisher
- Department of Oncology, ORCRB, Roosevelt Drive, University of Oxford, Oxford, UK
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Yuan Z, Yan T, Zheng W, Zuo C, Li H, Bian X, Zhang B, Li C, Cao Z, Xian L, Di Y, Liu F. Electrolytic partitioning of uranium and plutonium based on a new type of electrolytic mixer-settler. RADIOCHIM ACTA 2013. [DOI: 10.1524/ract.2013.2061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Summary
The design of a new type of electroreduction mixer-settler for the partitioning of uranium and plutonium during the Purex process, which is featured with E-shaped cathodes and U-shaped anodes in settling chamber, is described and the operational results achieved using this equipment are presented. The results show that this new type of mixer-settler has excellent separation performances. The flow rate of organic feed solution is 3 mL/min and the flow ratio of feed solution (1BF) to aqueous back extraction stream (1BX) and to organic wash stream (1BS) is 4/1/1. For an organic feed of 84 g/L uranium and 1.40 ⁓ 2.64 g/L plutonium, both the separation factor of plutonium from uranium and that of uranium from plutonium are apparently higher than 104
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Affiliation(s)
- Z. Yuan
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - T. Yan
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - W. Zheng
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - C. Zuo
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - H. Li
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - X. Bian
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - B. Zhang
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - C. Li
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - Z. Cao
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - L. Xian
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - Y. Di
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - F. Liu
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
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Jiang X, Liang J, Di Y. Automatic Adaptive Inverse Planning Optimization for Head-and-Neck Cancer Radiation Therapy. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.2053] [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: 10/27/2022]
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Affiliation(s)
- W Chen
- Department of Neurology, Shanghai Ninth People's Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Zheng B, Di Y. Individual Target Margin for Stereotactic Body Radiation Therapy of Lung Cancer. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1486] [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: 10/15/2022]
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38
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Shushu Z, Jizheng M, Xiangjian C, Hengfang W, Di Y, Jinan Z. e0198 Activity of calcineurin NFAT signalling pathway involving in remodelling in cTnI R146W mice. Heart 2010. [DOI: 10.1136/hrt.2010.208967.198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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39
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Di Y, Zhiping B, Peng J, Bing L, Xiangjian C, Jindan X, Chunrong G, Jinan Z. e0683 Clinical significance of autoantibodies against cardiac troponin I in patients with myocardial infarction and chronic heart failure. Heart 2010. [DOI: 10.1136/hrt.2010.208967.683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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40
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Yan TH, Zheng WF, Zuo C, Xian L, Zhang Y, Bian XY, Li RX, Di Y. The reduction of Np(VI) and Np(V) by tit dihydroxyurea and its application to the U/Np separation in the PUREX process. RADIOCHIM ACTA 2010. [DOI: 10.1524/ract.2010.1677] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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41
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Yang F, Long J, Di Y, Fu DL, Jin C, Ni QX, Zhu HG. A giant cystic lesion in the epigastric region. Pancreatic malignant gastrointestinal stromal tumour (GIST). Gut 2008; 57:1494, 1636. [PMID: 18941004 DOI: 10.1136/gut.2008.159392] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- F Yang
- Department of Surgery, Huashan Hospital, 12 Central Urumqi Road, Shanghai Medical College, Fudan University, Shanghai 200040, China
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Abstract
A number of trait-model-free tests have been proposed for linkage detection between a genomic region and a trait. These tests involve testing the dependence in segregation between a trait and marker alleles by assigning a score to every possible identity-by-descent configuration of the pedigree members without modeling the trait, and then averaging the scores over all such configurations compatible with the observed marker genotypes and genealogical relationship of the pedigree members. In this paper we propose a permutation test as an alternative to the existing exact trait-model-free tests for linkage detection. The proposed test is computationally efficient and is applicable on complex multigeneration pedigree structures. In this paper, we have compared the performance of the permutation test with two other exact trait-model-free tests for linkage detection on simulated datasets. We have demonstrated that the proposed permutation test is fully robust against mispecification of marker allele frequencies and has very good power for linkage detection. The permutation test is implemented in the program lm_ibdtests within the framework of MORGAN 2.8 (http://www.stat.washington.edu/thompson/Genepi/MORGAN/Morgan.shtml).
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Affiliation(s)
- S Basu
- Division of Biostatistics, University of Minnesota, USA.
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43
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Yang X, Feng Y, Tian G, Du Y, Ge X, Di Y, Zhang Y, Sun B, Xiao FS. Design and Size Control of Uniform Zeolite Nanocrystals Synthesized in Adjustable Confined Voids Formed by Recyclable Monodisperse Polymer Spheres. Angew Chem Int Ed Engl 2006; 45:5729. [PMID: 16948173 DOI: 10.1002/anie.200690120] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- X Yang
- Department of Chemistry & Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China
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Zhang J, Yuan H, Wen T, Xu F, Di Y, Huo K, Li YY. Cloning of the KcURA3 gene and development of a transformation system for Kluyveromyces cicerisporus. Appl Microbiol Biotechnol 2003; 62:387-91. [PMID: 12679853 DOI: 10.1007/s00253-003-1304-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [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: 11/29/2002] [Revised: 02/25/2003] [Accepted: 03/06/2003] [Indexed: 11/27/2022]
Abstract
KcURA3 was cloned from Kluyveromyces cicerisporus CBS4857 by complementation of the ura3 mutation in Saccharomyces cerevisiae. KcURA3 encodes a 267-amino-acid protein with 80% sequence identity to that of S. cerevisiae. An ura3 mutant strain from K. cicerisporus CBS4857, named Y179U, was obtained by selection on 5-fluoroorotic acid plates. Sequence analysis of this mutated gene revealed that it contained a point mutation at nucleotide position +277. Two vectors, pUK1 and pUKD, bearing KcURA3 were constructed. Either the lithium acetate method or electroporation could be used to transform pUK1 and pUKD intoY179U. The transformation efficiency using electroporation was higher than that using the lithium acetate method.
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Affiliation(s)
- J Zhang
- Institute of Genetics, State Key Laboratory of Genetic Engineering, Fudan University, School of Life Sciences, 200433 Shanghai, PR China
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Ma L, Zhao B, Di Y. [Treatment of neovascular glaucoma by anterior retinal cryotherapy and trabeculectomy]. Zhonghua Yan Ke Za Zhi 1996; 32:118-22. [PMID: 9206228] [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] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE To investigate the efficacy of anterior retinal cryotherapy (ARC) for treatment of neovascular glaucoma (NVG). METHODS 12 eyes (11 patients) with open angle NVG were treated by ARC only, 22 eyes (22 patients) with closed angle NVG were treated by ARC combined with trabeculectomy, and 32 eyes (31 patients) with closed angle NVG were treated by either ARC or cyclocryotherapy as controls. The follow-up period were 6-26 months. RESULTS Iris new vessels (INV) regressed or disappeared with normal intraocular pressure (IOP) in 92% (11/12) of the eyes with open angle NVG treated simply by ARC. In comparison with closed angle NVG treated by the same method, there was a significant difference in IOP (P < 0.05). The combination of ARC and trabeculectomy showed markedly better results than either ARC or cyclocryotherapy for treatment of closed angle NVG (P < 0.01). In the eyes with closed angle NVG, INV regressed or disappeared with normal IOP in 86% (19/22), 90% (18/20) achieved a marked relief from pain and the visual acuity was better or unchanged in 67% (8/12) that was significantly different from the eyes treated by cyclocryotherapy (P < 0.05). CONCLUSION The results indicate that ARC is suitable for treatment of NVG at early stage, and ARC combined with trabeculectomy, at later stage.
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Affiliation(s)
- L Ma
- Department of Ophthalmology, Beijing Hospital
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46
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Zhang SY, Zou LH, Gao YQ, Di Y, Wang XD. National epidemiological survey of blindness and low vision in China. Chin Med J (Engl) 1992; 105:603-8. [PMID: 1451568] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
According to the National Sample Survey of Blindness and Low Vision, the prevalence of blindness in China was 0.43%, resulting chiefly from cataract (41.06%), corneal diseases (15.38%), trachoma (10.87%), and glaucoma (8.80%); and the prevalence of low vision in China was 0.58%, of which the main causes were cataract (49.83%), ametropia/amblyopia (14.98%), trachoma (9.55%), corneal diseases (8.48%), chorioretinal diseases (6.27%), etc. Among children under 14 years of age, the leading cause of blindness and low vision was heredity (48.46%). Among elderly of 60 years and over, the leading cause of blindness and low vision was cataract (73.13%).
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Affiliation(s)
- S Y Zhang
- Beijing Institute of Ophthalmology, Beijing Tongren Hospital
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