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Li H, Zhang W, Jiang X, Wang H, Wang Q, Wang J, Jia X, Qin B, You S. Development of an Enzymatic Process for the Synthesis of the Key Intermediate of Telotristat Ethyl. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001110] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Feng M, Fang F, Fang T, Jiao H, You S, Wang X, Zhao W. Sox13 promotes hepatocellular carcinoma metastasis by transcriptionally activating Twist1. J Transl Med 2020; 100:1400-1410. [PMID: 32461589 DOI: 10.1038/s41374-020-0445-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 05/14/2020] [Accepted: 05/14/2020] [Indexed: 12/13/2022] Open
Abstract
SRY (sex-determining region Y)-box 13 (Sox13), a member of group D of the SRY-related high mobility group (HMG) box (Sox) family, is a critical regulator of embryonic development and cartilage formation. Few studies have investigated the role of Sox13 in tumorigenesis. The present study reveals the clinical significance and biological function of Sox13 in hepatocellular carcinoma (HCC). First, the expression of Sox13 in HCC samples was evaluated by qRT-PCR and western blotting, and its association with clinicopathological features and prognosis was determined. We found that Sox13 expression was higher in tumor tissue than in paired nontumor tissue. The upregulation of Sox13 was associated with poor differentiation, metastasis, recurrence and poor overall, and tumor-free survival of HCC patients. The function of Sox13 on HCC cell migration and invasion was then assessed by Transwell assay, and the results demonstrated that Sox13 promoted HCC cell invasion, migration, and epithelial-to-mesenchymal transition (EMT). Notably, the invasion, migration, and EMT of HCC cells induced by Sox13 overexpression could be abolished by Twist1 depletion, and Sox13 was positively correlated with Twist1 at both the mRNA and protein levels. Mechanistically, we revealed that Sox13 activated Twist1 transcription and consequently upregulated Twist1 expression. Furthermore, Sox13 formed a heterodimer with Sox5, and this heterodimer functionally cooperated to enhance the transcriptional activity of Twist1. Our findings suggest that Sox13 serves as an oncogene in HCC, and might be a novel prognostic and therapeutic candidate.
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Tian H, Liu T, You S, Zhang F. [Rapid determination of trace ciprofloxacin residue in milk samples using molecularly imprinted membrane extraction-high performance liquid chromatography-tandem mass spectrometry]. Se Pu 2020; 38:775-781. [PMID: 34213284 DOI: 10.3724/sp.j.1123.2020.02017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023] Open
Abstract
An enrofloxacin (ENR) molecularly imprinted membrane (MIM) was prepared with a polyvinylidenedifluoride (PVDF) membrane as the carrier, ENR as the dummy template molecule, α-methacrylic acid (MAA) as the functional monomer, ethylene glycol dimethacrylate (EGDMA) as the cross-linker, and a chloroform-methanol mixture solvent as the porogen. The MIM showed excellent selectivity, high adsorption capacity, and high adsorption rate for ciprofloxacin. Additionally, a method combining molecularly imprinted membrane extraction (MIME) and high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was developed and validated for the selective analysis of trace ciprofloxacin residue in milk samples. The sample pretreatment involved only a single step of protein precipitation. Ciprofloxacin showed good linearity in mass concentration range of 0.1-200 μg/L with a high correlation coefficient (r2>0.9996). The limit of detection (LOD, S/N=3) and limit of quantification (LOQ, S/N=10) were 0.02 μg/L and 0.1 μg/L, respectively. The relative standard deviations (RSDs) of interday and intraday precisions ranged from 3.3% to 7.9%. The ciprofloxacin recovery was in the range of 92.6%-119.1%. The results showed that the proposed method is simple and fast, with high accuracy and sensitivity, thus being suitable for the rapid detection of trace ciprofloxacin residue in milk samples.
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Norris J, Simpson B, Parry M, Allen C, Ball R, Freeman A, Kelly D, Kim H, Kirkham A, You S, Kasivisvanathan V, Whitaker H, Emberton M. mpMRI-visible prostate cancer is enriched with genomic hallmarks of poor prognosis: A bioinformatic analysis. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33723-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Zhao Y, Yu YQ, You S, Zhang CM, Wu L, Zhao W, Wang XM. Long Non-Coding RNA MALAT1 as a Detection and Diagnostic Molecular Marker in Various Human Cancers: A Pooled Analysis Based on 3255 Subjects. Onco Targets Ther 2020; 13:5807-5817. [PMID: 32606791 PMCID: PMC7311208 DOI: 10.2147/ott.s250796] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 05/20/2020] [Indexed: 12/12/2022] Open
Abstract
Purpose Accumulating studies have explored the potential diagnostic value of lncRNA MALAT1 in various cancers. However, there are still inconsistent results in diagnostic accuracy and reliability in individual studies. The aim of this pooled study was to summarize the overall diagnostic capacity of lncRNA MALAT1 in cancer detection and diagnosis. Methods Eligible studies satisfying the inclusion criteria were screened and selected from the online database. All statistical analyses were performed using Stata 14.0. Results A total of 17 eligible studies were included in this pooled analysis, with 1777 cases and 1478 controls. The overall results were shown as follows: sensitivity, 0.74 (95% CI=0.65-0.81), specificity, 0.79 (95% CI=0.73-0.84), positive likelihood ratio (PLR), 3.48 (95% CI=2.79-4.32), negative likelihood, 0.33 (95% CI=0.25-0.44), diagnostic score, 2.34 (95% CI=1.99-2.69), diagnostic odds ratio, 10.41 (95% CI=7.33-14.78) and area under the curve, 0.83 (95% CI=0.80-0.86). Deeks' funnel plot asymmetry test (p = 0.66) suggested no potential publication bias. Conclusion All these results indicate that lncRNA MALAT1 achieves a relatively moderate accuracy in cancer detection and diagnosis, and could serve as a diagnostic biomarker for cancers.
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Lin C, Dong J, Wei Z, Cheng KK, Li J, You S, Liu Y, Wang X, Chen Z. 1H NMR-Based Metabolic Profiles Delineate the Anticancer Effect of Vitamin C and Oxaliplatin on Hepatocellular Carcinoma Cells. J Proteome Res 2020; 19:781-793. [PMID: 31916767 DOI: 10.1021/acs.jproteome.9b00635] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Hepatocellular carcinoma (HCC) is a leading cause of cancer death worldwide. Because of its high recurrence rate and heterogeneity, effective treatment for advanced stage of HCC is currently lacking. There are accumulating evidences showing the therapeutic potential of pharmacologic vitamin C (VC) on HCC. However, the metabolic basis underlying the anticancer property of VC remains to be elucidated. In this study, we used a high-resolution proton nuclear magnetic resonance-based metabolomics technique to assess the global metabolic changes in HCC cells following VC treatment. In addition, the HCC cells were also treated with oxaliplatin (OXA) to explore the potential synergistic effect induced by the combined VC and OXA treatment. The current metabolomics data suggested different mechanisms of OXA and VC in modulating cell growth and metabolism. In general, VC treatment led to inhibition of energy metabolism via NAD+ depletion and amino acid deprivation. On the other hand, OXA caused significant perturbation in phospholipid biosynthesis and phosphatidylcholine biosynthesis pathways. The current results highlighted glutathione metabolism, and pathways related to succinate and choline may play central roles in conferring the combined effect between OXA and VC. Taken together, this study provided metabolic evidence of VC and OXA in treating HCC and may contribute toward the potential application of combined VC and OXA as complementary HCC therapies.
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Sun J, Kim H, You S, Choi Y, Min Y, Park K. MA10.03 Quantitative Computed Tomography (CT) Based Texture Analysis; Could We Predict the Future Growth of the Pure Ground Glass Nodules? J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zhao Y, You S, Yu YQ, Zhang S, Li PT, Ye YH, Zhao WX, Li J, Li Q, Jiao H, Chi XQ, Wang XM. Decreased nuclear expression of FTO in human primary hepatocellular carcinoma is associated with poor prognosis. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2019; 12:3376-3383. [PMID: 31934180 PMCID: PMC6949847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 04/23/2019] [Indexed: 06/10/2023]
Abstract
Fat mass and obesity-associated protein (FTO) has been well known for a pivotal role in regulation of fat mass, adipogenesis and body weight. In recent years, increasing studies revealed a strong association between FTO and various types of cancer. Its role in human hepatocellular carcinoma, however, remains unclear. We aimed at investigating the expression pattern and clinical significance of FTO in hepatocellular carcinoma. We found that FTO mRNA levels were significantly lower in hepatocellular carcinoma tissues. Immunohistochemical analysis showed the expression of FTO was reduced in the nuclei in hepatocellular carcinoma, and was associated with AFP level (P < 0.001), tumor size (P < 0.001), metastasis (P = 0.025) and vascular invasion (P < 0.001). Patients with decreased FTO expression had a shorter overall and tumor-free survival time (P = 0.004 and P = 0.006) than those with normal FTO expression. Cox's proportional hazard regression model revealed that reduced expression of FTO was a risk factor associated with the prognosis of HCC patients (P = 0.022). These results indicated that decreased FTO expression is correlated with clinicopathological factors, implying that FTO could be a vital predictor of poor outcome in HCC patients and serves as a novel biomarker for HCC.
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Li J, You S, Zhang S, Hu Q, Wang F, Chi X, Zhao W, Xie C, Zhang C, Yu Y, Liu J, Zhao Y, Liu P, Zhang Y, Wei X, Li Q, Wang X, Yin Z. Elevated N-methyltransferase expression induced by hepatic stellate cells contributes to the metastasis of hepatocellular carcinoma via regulation of the CD44v3 isoform. Mol Oncol 2019; 13:1993-2009. [PMID: 31294922 PMCID: PMC6717763 DOI: 10.1002/1878-0261.12544] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 06/17/2019] [Accepted: 07/10/2019] [Indexed: 12/31/2022] Open
Abstract
The cross‐talk between hepatic stellate cells (HSCs) and hepatic carcinoma cells contributes to hepatocellular carcinoma (HCC) progression, but the underlying mechanism is largely unknown. We report here that activated HSCs induce upregulation of nicotinamide N‐methyltransferase (NNMT), which is known to regulate multiple metabolic pathways in hepatoma cells of the liver. High levels of NNMT in HCC tissues were positively correlated with vascular invasion, increased serum HBV‐DNA levels, and distant metastasis. In addition, functional assays showed that NNMT promoted HCC cell invasion and metastasis by altering the histone H3 methylation on 27 methylation pattern and transcriptionally activating cluster of differentiation 44 (CD44). NNMT‐mediated N6‐methyladenosine modification of CD44 mRNA resulted in the formation of a CD44v3 splice variant, while its product 1‐methyl‐nicotinamide stabilized CD44 protein by preventing ubiquitin‐mediated degradation. Finally, NNMT was also shown to be a target of statins that inhibited metastasis of hepatoma cells. Taken together, our study shows for the first time that the NNMT/CD44v3 axis regulates HCC metastasis and presents NNMT as a promising prognostic biomarker and therapeutic target for HCC.
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Kim S, You S, Cha J, Lee J. Feasibility of modulated electro-hyperthermia as a concomitant boost to preoperative radiotherapy in locally advanced rectal cancer: A phase 2 trial. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Wu X, Zhang W, Li H, You S, Shi J, Zhang C, Shi R, Huang Z, Cao Y, Zhang X. Plasma C-type lectin-like receptor 2 as a predictor of death and vascular events in patients with acute ischemic stroke. Eur J Neurol 2019; 26:1334-1340. [PMID: 31081579 DOI: 10.1111/ene.13984] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 05/06/2019] [Indexed: 01/07/2023]
Abstract
BACKGROUND AND PURPOSE C-type lectin-like receptor 2 (CLEC-2) has prominent involvement in platelet activation, which is increased in coronary heart disease and acute ischaemic stroke (AIS) and is associated with stroke progression and stroke prognosis. Here, the aim was to examine the prognostic value of CLEC-2 in death and vascular event recurrence in AIS patients. METHODS In all, 352 patients with AIS were studied prospectively. All patients were followed up for 1 year. Death for all vascular events and a combination of death and vascular diseases (recurrent stroke, myocardial infarction, hospitalized and treated angina, hospitalized and treated peripheral arterial disease) were recorded. RESULTS During 1 year of follow-up, 46 patients (14.2%) experienced death or combined end-points (23 death and 46 combined end-points). Plasma CLEC-2 (pCLEC-2) was significantly associated with an increased risk of death and combined events of death and vascular diseases after adjusting for age, sex, history of hypertension, diabetes mellitus and coronary artery disease, and National Institutes of Health Stroke Scale scores. Each 1 SD higher log-transformed pCLEC-2 was associated with a 4.27-fold (hazard ratio 4.27, 95% confidence interval 1.71-10.65) increased risk for death and a 2.42-fold increased risk for combined end-points (hazard ratio 2.42, 95% confidence interval 1.52-3.86). The optimal cut-off point of pCLEC-2 for predicting death was 184.38 pg/ml. CONCLUSIONS Higher pCLEC-2 levels at admission were associated with increased risk of death and combined events of death and vascular diseases in patients with AIS, which indicated that pCLEC-2 is an important prognostic factor for AIS.
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Zhu Q, Wang J, Yin Z, Xie F, Chen R, You S, Jiang C, Li S, Li Y, Zha X. Dual tracing modality of indocyanine green and methylene blue is an alternative option for sentinel lymph node biopsy. Breast 2019. [DOI: 10.1016/s0960-9776(19)30408-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Chen R, Wang J, Yin Z, Xie F, Zhu Q, You S, Jiang C, Li Y, Li S, Zha X. Factors analysis for choosing mastectomy in patients eligible for breast conserving surgery. Breast 2019. [DOI: 10.1016/s0960-9776(19)30405-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Guo J, Zhang R, Ouyang J, Zhang F, Qin F, Liu G, Zhang W, Li H, Ji X, Jia X, Qin B, You S. Stereodivergent Synthesis of Carveol and Dihydrocarveol through Ketoreductases/Ene‐Reductases Catalyzed Asymmetric Reduction. ChemCatChem 2018. [DOI: 10.1002/cctc.201801391] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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You S, Wang F, Hu Q, Li P, Zhang C, Yu Y, Zhang Y, Li Q, Bao Q, Liu P, Li J. Abnormal expression of YEATS4 associates with poor prognosis and promotes cell proliferation of hepatic carcinoma cell by regulation the TCEA1/DDX3 axis. Am J Cancer Res 2018; 8:2076-2087. [PMID: 30416857 PMCID: PMC6220140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 09/14/2018] [Indexed: 06/09/2023] Open
Abstract
YEATS domain containing 4 (YEATS4) is usually amplified and functions as an oncogene in several malignancies, such as colorectum, ovarian, breast and lung. However, the biological role of YEATS4 in hepatocellular carcinoma (HCC) has not yet been discussed. Herein, we found that YEATS4 was significantly upregulated in HCC compared to para-cancerous tissues, and was associated with poor prognosis, large tumor size, poor differentiation and distant metastasis. In addition, YEATS4 promoted HCC cell proliferation and colony formation by binding to and increasing the transcriptional activity of the TCEA1 promoter. Concurrently, upregulation of TCEA1 increased the stability of the DDX3 protein, a member of the DEAD box RNA helicase family, and augmented the proliferative and colony forming ability of HCC cells. Furthermore, YEATS4 accelerated tumor growth in vivo in a xenograft HCC model. Taken together, our study provides evidence for the first time on the potential role of the YEATS4/TCEA1/DDX3 axis in regulating HCC progression, and presents YEATS4 as a promising therapeutic target and prognosis maker for HCC.
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Park Y, Woo, M C, Moon H, Moon B, You S. P05.33 Extra-articular tenosynovial giant cell tumor of diffuse type in the temporal area with brain parenchymal invasion. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy139.359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Bai Y, Lee S, You S. Breastfeeding Among Korean Immigrant Mothers: Before vs. After Childbirth. J Acad Nutr Diet 2018. [DOI: 10.1016/j.jand.2018.06.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Tan B, Caillon P, You S, Adouard C, Pou P, Pou D, Bailly F, Jean K, Zoulim F. Screening of viral hepatitis and HIV among migrants from Southeast Asia. Rev Epidemiol Sante Publique 2018. [DOI: 10.1016/j.respe.2018.05.330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Qin F, Qin B, Zhang W, Liu Y, Su X, Zhu T, Ouyang J, Guo J, Li Y, Zhang F, Tang J, Jia X, You S. Discovery of a Switch Between Prelog and Anti-Prelog Reduction toward Halogen-Substituted Acetophenones in Short-Chain Dehydrogenase/Reductases. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00807] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Shi J, Peng H, You S, Liu Y, Xu J, Xu Y, Liu H, Shi R, Cao Y, Liu CF. Increase in neutrophils after recombinant tissue plasminogen activator thrombolysis predicts poor functional outcome of ischaemic stroke: a longitudinal study. Eur J Neurol 2018; 25:687-e45. [PMID: 29341345 DOI: 10.1111/ene.13575] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 01/11/2018] [Indexed: 12/30/2022]
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Li Y, Qin B, Li X, Tang J, Chen Y, Zhou L, You S. Selective Oxidations of Cyperenoic Acid by Slightly Reshaping the Binding Pocket of Cytochrome P450 BM3. ChemCatChem 2018. [DOI: 10.1002/cctc.201701088] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zhou Y, Zhang G, Wang F, Wang J, Ding Y, Li X, Shi C, Li J, Shih C, You S. Developing a novel dual PI3K–mTOR inhibitor from the prodrug of a metabolite. Onco Targets Ther 2017; 10:5077-5087. [PMID: 29118584 PMCID: PMC5659256 DOI: 10.2147/ott.s142492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
This study presents a process of developing a novel PI3K–mTOR inhibitor through the prodrug of a metabolite. The lead compound (compound 1) was identified with similar efficacy as that of NVP-BEZ235 in a tumor xenograft model, but the exposure of compound 1 was much lower than that of NVP-BEZ235. After reanalysis of the blood sample, a major metabolite (compound 2) was identified. Compound 2 exerted similar in vitro activity as compound 1, which indicated that compound 2 was an active metabolite and that the in vivo efficacy in the animal model came from compound 2 instead of compound 1. However, compound 1 was metabolized into compound 2 predominantly in the liver microsomes of mouse, but not in the liver microsomes of rat, dog, or human. In order to translate the efficacy in the animal model into clinical development or predict the pharmacokinetic/pharmacodynamic parameters in the clinical study using a preclinical model, we developed the metabolite (compound 2) instead of compound 1. Due to the low bioavailability of compound 2, its prodrug (compound 3) was designed and synthesized to improve the solubility. The prodrug was quickly converted to compound 2 through both intravenous and oral administrations. Because the prodrug (compound 3) did not improve the oral exposure of compound 2, developing compound 3 as an intravenous drug was considered by our team, and the latest results will be reported in the future.
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Chen H, Zhao Z, Liu L, Kong W, Lin Y, You S, Bai W, Xiao Y, Zheng H, Jiang L, Li J, Zhou J, Tao D, Wan J. Genetic analysis of a hybrid sterility gene that causes both pollen and embryo sac sterility in hybrids between Oryza sativa L. and Oryza longistaminata. Heredity (Edinb) 2017; 119:166-173. [PMID: 28657614 DOI: 10.1038/hdy.2017.32] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 05/09/2017] [Accepted: 05/11/2017] [Indexed: 12/19/2022] Open
Abstract
Oryza longistaminata originates from African wild rice and contains valuable traits conferring tolerance to biotic and abiotic stress. However, interspecific crosses between O. longistaminata and Oryza sativa cultivars are hindered by reproductive barriers. To dissect the mechanism of interspecific hybrid sterility, we developed a near-isogenic line (NIL) using indica variety RD23 as the recipient parent and O. longistaminata as the donor parent. Both pollen and embryo sac semi-sterility were observed in F1 hybrids between RD23 and NIL. Cytological analysis demonstrated that pollen abortion in F1 hybrids occurred at the early bi-nucleate stage due to a failure of the first mitosis in microspores. Partial embryo sacs in the F1 hybrids were defective during the functional megaspore formation stage. Most notably, nearly half of the male or female gametes were aborted in heterozygotes S40iS40l, regardless of their genotypes. Thus, S40 was indicated as a one-locus sporophytic sterility gene controlling both male and female fertility in hybrids between RD23 and O. longistaminata. A population of 16 802 plants derived from the hybrid RD23/NIL-S40 was developed to fine-map S40. Finally, the S40 locus was delimited to an 80-kb region on the short arm of chromosome 1 in terms with reference sequences of cv. 93-11. Eight open reading frames (ORFs) were localized in this region. On the basis of gene expression and genomic sequence analysis, ORF5 and ORF8 were identified as candidate genes for the S40 locus. These results are helpful in cloning the S40 gene and marker-assisted transferring of the corresponding neutral allele in rice breeding programs.
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Zhang ZH, Chen Y, Yan XJ, Sun Y, Yang XM, Cai XY, You S. Synthesis and evaluation of novel urea and amide derivatives of 2-amino-4-phenylthiazole as potential antibacterial agents. Med Chem Res 2017. [DOI: 10.1007/s00044-017-1910-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Chen Y, Tian JL, Wu JS, Sun TM, Zhou LN, Song SJ, You S. Biotransfomation of cyperenoic acid by Cunninghamella elegans AS 3.2028 and the potent anti-angiogenic activities of its metabolites. Fitoterapia 2017; 118:32-37. [DOI: 10.1016/j.fitote.2017.02.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 02/12/2017] [Accepted: 02/14/2017] [Indexed: 10/20/2022]
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