16 results on '"Qianqian Tang"'
Search Results
2. Transcriptional memory and response to adverse temperatures in plants
- Author
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Fei Yan, Zeng Tao, Qianqian Tang, and Wei Xie
- Subjects
Transcription, Genetic ,Acclimatization ,Climate Change ,Arabidopsis ,Plant Development ,Review ,General Biochemistry, Genetics and Molecular Biology ,Gene Expression Regulation, Plant ,Plant defense against herbivory ,Cold acclimation ,Arabidopsis thaliana ,Epigenetics ,General Pharmacology, Toxicology and Pharmaceutics ,General Veterinary ,biology ,fungi ,Temperature ,food and beverages ,General Medicine ,Vernalization ,biology.organism_classification ,Plant development ,Neuroscience ,Reprogramming ,Temperature response ,Heat-Shock Response - Abstract
Temperature is one of the major environmental signals controlling plant development, geographical distribution, and seasonal behavior. Plants perceive adverse temperatures, such as high, low, and freezing temperatures, as stressful signals that can cause physiological defects and even death. As sessile organisms, plants have evolved sophisticated mechanisms to adapt to recurring stressful environments through changing gene expression or transcriptional reprogramming. Transcriptional memory refers to the ability of primed plants to remember previously experienced stress and acquire enhanced tolerance to similar or different stresses. Epigenetic modifications mediate transcriptional memory and play a key role in adapting to adverse temperatures. Understanding the mechanisms of the formation, maintenance, and resetting of stress-induced transcriptional memory will not only enable us to understand why there is a trade-off between plant defense and growth, but also provide a theoretical basis for generating stress-tolerant crops optimized for future climate change. In this review, we summarize recent advances in dissecting the mechanisms of plant transcriptional memory in response to adverse temperatures, based mainly on studies of the model plant Arabidopsis thaliana. We also discuss remaining questions that are important for further understanding the mechanisms of transcriptional memory during the adverse temperature response.
- Published
- 2021
3. Preparation of polyether amine-bridged lignosulfonate for utilization as a nano dye dispersant
- Author
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Qianqian Tang, Qing Chen, Mingsong Zhou, and Dongjie Yang
- Subjects
Structural Biology ,Surface Properties ,Quartz Crystal Microbalance Techniques ,General Medicine ,Adsorption ,Amines ,Coloring Agents ,Microscopy, Atomic Force ,Molecular Biology ,Biochemistry - Abstract
The long-term stability of nano disperse dye slurry is a problem in industry. In this work, high molecular-weight polyether amine-bridged lignosulfonates (PEABLs) were prepared to improve the adsorption strength of dispersants on dye surfaces, and thus the stability of nano disperse dyes. Specifically, the molecular simulation software was firstly used to analyze the adsorption of PEABL on dye surfaces. Then, PEABLs with different molecular weights were synthesized and characterized by adjusting the addition of polyether amine. Next, nano disperse dyes were prepared using PEABLs and the optimum grinding conditions were explored and obtained. Finally, PEABL3 was determined to the optimum dispersant, having a smallest particle size (168 nm) and highest stability, comparable to the commercial Reax 85A dispersant and basically satisfying the demand of nano disperse dyes required in digital transfer printing technology. Quartz crystal microbalance (QCM), atomic force microscopy (AFM) and zeta potential results showed as the molecular weight of PEABL increased, the adsorption amount, adsorbed layer rigidity, adsorption force and absolute zeta potential value all firstly increased due to the enhanced hydrophobic interaction, and then decreased due to the formation of complicated three-dimensional network structures caused by the crosslink of lignosulfonate molecules. A maximum was observed for PEABL3.
- Published
- 2022
4. Preparation of a new gel-type lignin-based cationic adsorption resin for efficient removal of Ca2+ from aqueous solutions
- Author
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Qianqian Tang, Hao Wu, Mingsong Zhou, and Dongjie Yang
- Subjects
Structural Biology ,General Medicine ,Molecular Biology ,Biochemistry - Published
- 2023
5. Preparation of nano disperse dyes using sulfomethylated lignin: Effects of sulfonic group contents
- Author
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Qianqian Tang, Qing Chen, Mingsong Zhou, and Dongjie Yang
- Subjects
Structural Biology ,General Medicine ,Molecular Biology ,Biochemistry - Published
- 2023
6. Electrospun nanofibers promote wound healing: theories, techniques, and perspectives
- Author
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Yue Cheng, Liyuan Zhang, Miao Jin, Chen Gao, Juan Wang, Runhuai Yang, Qianqian Tang, Zhongrong Chen, and Gang Zhao
- Subjects
Nanofibers ,Biomedical Engineering ,Pain relief ,Nanotechnology ,02 engineering and technology ,03 medical and health sciences ,Tissue engineering ,Electrospun nanofibers ,Humans ,Medicine ,General Materials Science ,030304 developmental biology ,Wound Healing ,0303 health sciences ,Tissue Engineering ,business.industry ,Biomaterial ,General Chemistry ,General Medicine ,021001 nanoscience & nanotechnology ,Alternative treatment ,Electrospinning ,Anti-Bacterial Agents ,Nanofiber ,0210 nano-technology ,business ,Wound healing - Abstract
At present, the clinical strategies for treating chronic wounds are limited, especially when it comes to pain relief and rapid wound healing. Therefore, there is an urgent need to develop alternative treatment methods. This paper provides a systematic review on recent researches on how electrospun nanofiber scaffolds promote wound healing and how the electrospinning technology has been used for fabricating multi-dimensional, multi-pore and multi-functional nanofiber scaffolds that have greatly promoted the development of wound healing dressings. First, we provide a review on the four stages of wound healing, which is followed by a discussion on the evolvement of the electrospinning technology, what is involved in electrospinning devices, and factors affecting the electrospinning process. Finally, we present the possible mechanisms of electrospun nanofibers to promote wound healing, the classification of electrospun polymers, cell infiltration favoring fiber scaffolds, antibacterial fiber scaffolds, and future multi-functional scaffolds. Although nanofiber scaffolds have made great progress as a type of multi-functional biomaterial, major challenges still remain for commercializing them in a way that fully meets the needs of patients.
- Published
- 2021
7. Chlorobisphenol A activated kisspeptin/GPR54-GnRH neuroendocrine signals through ERα and GPER pathway in neuronal GT1-7 cells
- Author
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Bingli Lei, Lanbing Xu, Yaoyao Huang, Yun Liu, Mengjie Yu, and Qianqian Tang
- Subjects
Kisspeptins ,endocrine system ,Health, Toxicology and Mutagenesis ,Kisspeptin/GPR54-GnRH neuroendocrine system ,Public Health, Environmental and Occupational Health ,Estrogen Receptor alpha ,G protein-coupled estrogen receptor ,Estrogens ,General Medicine ,Molecular mechanisms ,Pollution ,Environmental pollution ,Cell Line ,Chlorobisphenol A ,Gonadotropin-Releasing Hormone ,Environmental sciences ,Phosphatidylinositol 3-Kinases ,TD172-193.5 ,GT1–7 neuronal cells ,GE1-350 ,hormones, hormone substitutes, and hormone antagonists - Abstract
Chlorobisphenol A (ClxBPA) is a kind of novel estrogenic compounds. The present study aims to investigate the effects of three ClxBPA compounds on the kisspeptin/G protein-coupled receptor 54 (GPR54, also named KissR1)-gonadotropin-releasing hormone (GnRH) (KGG) system in neuronal GT1–7 cells with mechanistic insights by estrogen receptor signaling pathways. The study demonstrated that low-concentration ClxBPA induced the cell proliferation, promoted GnRH secretion, upregulated the expression of KGG neuroendocrine signal-related proteins (KissR1, GnRH1 and kisspeptin) and genes including Kiss1, GnRH1, KissR1, luteinizing hormone receptor (Lhr) and follicle-stimulating hormone receptor (Fshr) in GT1–7 cells. Additionally, ClxBPA activated nuclear estrogen receptor alpha (ERα) and member estrogen receptor G protein-coupled estrogen receptor (GPER)-regulated phosphatidylinositol-3-kinase/protein kinase B (PI3K/Akt) and extracellular signal-regulated kinase (Erk1/2) signaling pathways. Pretreatment of GT1–7 cells with GPER inhibitor G15 and ERα inhibitor ICI reduced the expression of KissR1, GnRH1 and kisspeptin proteins, attenuated mRNA levels of Kiss1, GnRH1, KissR1, Fshr and Lhr genes, and decreased ClxBPA-induced GT1–7 cell proliferation. The results suggested that ClxBPA activated the KGG neuroendocrine signals and induced the proliferation of GT1–7 cells via ERα and GPER signaling pathways. This study provides a new perspective to explore the neuroendocrine toxicity mechanism of ClxBPA. Capsule: ClxBPA activated KGG neuroendocrine signaling pathway via ERα and GPER and induced the proliferation of GT1–7 cells.
- Published
- 2022
8. The proliferation effects of fluoxetine and amitriptyline on human breast cancer cells and the underlying molecular mechanisms
- Author
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Lanbing Xu, Wei Peng, Bingli Lei, Qianqian Tang, Xiaolan Zhang, and Chenglian Feng
- Subjects
MAPK/ERK pathway ,Cell Survival ,MAP Kinase Signaling System ,Health, Toxicology and Mutagenesis ,Amitriptyline ,Breast Neoplasms ,010501 environmental sciences ,Toxicology ,01 natural sciences ,Receptors, G-Protein-Coupled ,03 medical and health sciences ,Cell Line, Tumor ,Fluoxetine ,Humans ,Protein kinase B ,PI3K/AKT/mTOR pathway ,030304 developmental biology ,0105 earth and related environmental sciences ,Cell Proliferation ,Pharmacology ,0303 health sciences ,Chemistry ,Cell growth ,Estrogen Receptor alpha ,Estrogens ,General Medicine ,Antidepressive Agents ,Receptors, Estrogen ,SKBR3 ,Cancer cell ,Cancer research ,Phosphorylation ,Female ,GPER ,Proto-Oncogene Proteins c-akt - Abstract
Some studies have suggested possible estrogen actions for antidepressants such as fluoxetine. However, the specific molecular mechanisms remain unclear. In this study, the molecular mechanism of fluoxetine-induced the proliferation of breast cancer SKBR3 and MCF-7 cells was evaluated by detecting ERα and GPR30-mediated ERK and PI3K/AKT signals. We found that low concentrations of fluoxetine upregulated the expression of GPR30, ERα, CyclinD1, and C-MYC proteins, as well as elevated the phosphorylation of ERK and AKT. The phosphorylation of ERK and AKT decreased when the cells were pretreated with ERα inhibitor ICI, GPR30 inhibitor G15, and PI3K inhibitor WM prior to fluoxetine exposure. The addition of these inhibitors also attenuated the fluoxetine-induced cell proliferation. These findings indicated that fluoxetine activated the PI3K/AKT and ERK signaling cascades via GPR30 to derive the cell proliferation. It suggests that fluoxetine has the potential to exert estrogen actions via GPR30.
- Published
- 2020
9. Insight into the mechanism of tetrachlorobisphenol A (TCBPA)-induced proliferation of breast cancer cells by GPER-mediated signaling pathways
- Author
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Bingli Lei, Su Sun, Qianqian Tang, Yaoyao Huang, Lanbing Xu, and Xiaolan Zhang
- Subjects
010504 meteorology & atmospheric sciences ,Health, Toxicology and Mutagenesis ,Estrogen receptor ,Breast Neoplasms ,010501 environmental sciences ,Toxicology ,01 natural sciences ,Receptors, G-Protein-Coupled ,Wortmannin ,chemistry.chemical_compound ,Phosphatidylinositol 3-Kinases ,Cell Line, Tumor ,Humans ,Protein kinase B ,PI3K/AKT/mTOR pathway ,0105 earth and related environmental sciences ,Cell Proliferation ,Estrogen Receptor alpha ,Estrogens ,General Medicine ,Pollution ,Cell biology ,chemistry ,Receptors, Estrogen ,Cancer cell ,MCF-7 Cells ,Signal transduction ,Estrogen receptor alpha ,GPER ,Chlorophenols - Abstract
Tetrachlorobisphenol A (TCBPA), a chlorinated derivative of bisphenol A, is an endocrine disruptor based on interaction with nuclear estrogen receptor alpha (ERα). However, there is only limited data on the mechanisms through which TCBPA-associated estrogenic activity is related to the membrane G protein-coupled estrogen receptor (GPER) pathway. In this study, three human breast cancer cell lines-MCF-7, SKBR3, and MDA-MB-231 cells were used to evaluate whether, as well as how, TCBPA at concentration range of 0.001–50 μM affect cell proliferation. The role of GPER signaling in TCBPA-induced cell proliferation was studied by analyzing the protein expression and mRNA levels of relevant signal targets. The results showed that low concentrations of TCBPA significantly induced the proliferation of MCF-7, SKBR3, and MDA-MB-231 cells, with MCF-7 cells being the most sensitive to TCBPA exposure. Low-concentration TCBPA also upregulated the expression of GPER, CyclinD1, c-Myc, and c-Fos proteins, as well as increased the phosphorylation of extracellular signal-regulated-kinase 1/2 (Erk1/2) and protein kinase B (Akt). Additionally, the mRNA levels of genes associated with estrogen signaling pathways also increased upon exposure to TCBPA. However, the phosphorylation of Erk1/2 and Akt decreased when the cells were treated with GPER inhibitor G15 and phosphatidylinositide 3-kinase (PI3K) inhibitor wortmannin (WM) prior to TCBPA exposure. Besides, the increased proliferation of breast cancer cells induced by TCBPA were also inhibited. In ERα-positive MCF-7 cells, TCBPA also upregulated ERα expression, and ERα was found to interact with GPER-mediated signaling. The results indicate that GPER activates the PI3K/Akt and Erk1/2 signal cascades to drive the cell proliferation observed for low concentrations of TCBPA. The presented results suggest a new mechanism by which TCBPA exerts estrogenic action in breast cancer cells, namely, GPER signaling in an ERα-independent manner, and also highlights the potential risks to human health of the usage of TCBPA.
- Published
- 2020
10. Peiminine serves as an adriamycin chemosensitizer in gastric cancer by modulating the EGFR/FAK pathway
- Author
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Tingyu Li, Lanjing Ma, Yongzhan Nie, Meiling Ding, Qianqian Tang, Gu Zhengyi, and Wang Yunfei
- Subjects
0301 basic medicine ,Cancer Research ,Protein Array Analysis ,Chemosensitizer ,Mice, Nude ,Apoptosis ,Mice ,03 medical and health sciences ,0302 clinical medicine ,Cyclin D1 ,Nude mouse ,Stomach Neoplasms ,Biomarkers, Tumor ,Tumor Cells, Cultured ,Animals ,Humans ,Medicine ,MTT assay ,Cell Proliferation ,Mice, Inbred BALB C ,Antibiotics, Antineoplastic ,Oncogene ,biology ,business.industry ,Cell growth ,General Medicine ,Cell cycle ,biology.organism_classification ,Xenograft Model Antitumor Assays ,ErbB Receptors ,Gene Expression Regulation, Neoplastic ,030104 developmental biology ,Oncology ,Doxorubicin ,Drug Resistance, Neoplasm ,Focal Adhesion Kinase 1 ,030220 oncology & carcinogenesis ,Cancer research ,Female ,business ,Cevanes ,Signal Transduction - Abstract
Gastric cancer (GC) is one of the most common malignancies of the digestive tract. Adriamycin (ADR) has been widely utilized in various chemotherapy regimens for treating GC, yet its long-term application may increase drug resistance resulting in treatment failure. Increasing evidence shows that bioactive natural products can be used as chemotherapeutic sensitizers that can significantly improve chemotherapy sensitivity. Peiminine (PMI) is a biologically active component extracted from Fritillaria walujewii Regel. Thus, in the present study, we aimed to investigate whether peiminine (PMI) alters the chemosensitivity of GC to adriamycin (ADR). GC cells were treated with ADR with or without PMI. MTT assay, flow cytometry and a nude mouse tumor xenograft model of SGC7901 cells were used to evaluate the chemosensitization activity of PMI combined with ADR. Western blotting was used to examine the expression of cyclin D1 and cleaved PARP. The RayBio® Human RTK phosphorylation antibody array kit was used to test the differential protein expression. Compared with the ADR group, PMI combined with ADR significantly suppressed cell proliferation and induced cell apoptosis in vitro. The growth curve and tumor weight of the tumor xenografts were significantly decreased in mice treated with the combination of PMI and ADR. However, the organs showed no obvious abnormality after treatment with PMI plus ADR. The expression of cyclin D1 was decreased and the level of cleaved PARP was increased after treatment with PMI and ADR. The expression of p-EGFR and p-FAK was downregulated in cells treated with PMI and ADR, and the validation of p-EGFR and p-FAK was in accordance with the result of the phosphorylation antibody array kit. PMI may serve as a new chemosensitizer by inhibiting the proliferation and inducing the apoptosis to enhance the chemotherapeutic drug sensitivity of ADR in GC.
- Published
- 2018
11. Polymorphism of insulin-like growth factor 1 gene and its association with litter size in Small Tail Han sheep
- Author
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B. Y. Zhang, Qianqian Tang, Ning Li, Pingqing Wang, L. Fang, J. N. He, R. Di, G. L. Cao, D. W. Huang, M. X. Chu, and T. Feng
- Subjects
endocrine system ,Candidate gene ,Genotype ,Litter Size ,5' Flanking Region ,Molecular Sequence Data ,5' flanking region ,Biology ,Exon ,Gene Frequency ,Polymorphism (computer science) ,Genetics ,Animals ,Insulin-Like Growth Factor I ,Molecular Biology ,Gene ,Allele frequency ,Genetic Association Studies ,Polymorphism, Single-Stranded Conformational ,Sheep ,Base Sequence ,Sequence Analysis, DNA ,General Medicine ,Molecular biology ,Female ,Restriction fragment length polymorphism ,Polymorphism, Restriction Fragment Length ,hormones, hormone substitutes, and hormone antagonists ,Microsatellite Repeats - Abstract
The insulin-like growth factor 1 (IGF1) gene was studied as a candidate gene for high prolificacy in sheep. Polymorphisms of 5' regulatory region and all four exons of IGF1 gene were detected in Small Tail Han (n = 277), Hu (n = 58), Texel (n = 48) and Dorset (n = 46) sheep by PCR-RFLP and PCR-SSCP analysis. A microsatellite polymorphic site and a restriction fragment length polymorphism were shown in the 5' regulatory region of IGF1 gene. The ewes with genotype 123/123 bp had 0.81 (P0.05) or 1.03 (P0.01) lambs more than those with genotype 125/125 bp or 125/127 bp, the ewes with genotype 123/125 bp had 0.46 (P0.05) or 0.68 (P0.01) lambs more than those with genotype 125/125 bp or 125/127 bp. In addition, there were two mutations (C1511G and A1513G) in 5' regulatory region of IGF1 gene. The ewes with genotype BB or AB had 0.96 (P0.05) or 0.38 (P0.05) lambs more than those with genotype AA, but there were no significant differences between BB and AB genotypes (P0.05) in Small Tail Han sheep. These results preliminarily indicated that these polymorphisms of IGF1 gene could be used in molecular marker-assisted selection for sheep breeding programs.
- Published
- 2012
12. Polymorphisms of caprine POU1F1 gene and their association with litter size in Jining Grey goats
- Author
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L. Fang, G. L. Cao, R. Di, T. Feng, Ning Li, M. X. Chu, and Qianqian Tang
- Subjects
China ,Linkage disequilibrium ,Genotype ,Litter Size ,DNA Mutational Analysis ,Molecular Sequence Data ,Locus (genetics) ,Single-nucleotide polymorphism ,Breeding ,Biology ,Polymerase Chain Reaction ,Polymorphism, Single Nucleotide ,Animal science ,Gene Frequency ,Genetic linkage ,Genetics ,Animals ,Cashmere goat ,Allele ,Molecular Biology ,Alleles ,Genetic Association Studies ,Base Sequence ,Goats ,General Medicine ,Haplotypes ,Genetic Loci ,Boer goat ,Female ,Transcription Factor Pit-1 ,Polymorphism, Restriction Fragment Length - Abstract
Seven pairs of primers were designed to amplify 5' promoter region, six exons and partial introns and to detect the polymorphisms of POU1F1 gene in five goat breeds with different prolificacy. The results showed that six mutations were identified in caprine POU1F1 gene including C256T in exon 3, C53T and T123G in intron 3, and G682T (A228S), T723G and C837T in exon 6. The former four mutations were novel SNPs in goat POU1F1 gene. The 53 and 123 loci were in complete linkage disequilibrium in five caprine breeds. Regarding the 256 locus, the Jining Grey goat does with genotype CT had 0.66 kids more than those with genotype CC (P 0.05), while does with genotype GT had 0.63 (P 0.05) kids more than those with genotype GG at the 682 locus. The present study preliminarily showed an association between allele T at the 256 and 682 loci of POU1F1 gene and high litter size in Jining Grey goats. Totally 16 haplotypes and 50 genotypes were identified at the above six loci in POU1F1 gene of five goat breeds. Three common haplotypes (hap2, hap3 and hap4) were identified in five goat breeds joined. Four specific haplotypes (hap7, hap9, hap11 and hap13) were detected in Jining Grey goats. The predominant haplotype was hap1 (35.29% and 48.25%) in both Jining Grey and Guizhou White goats, while hap4 (50%) in Boer goats, and hap2 (42.86% and 38.75%) in both Wendeng Dairy and Liaoning Cashmere goats. The most frequent genotypes at six loci in the above five goat breeds were hap1/hap2 (14.38%) and hap1/hap4 (14.38%), hap1/hap2 (38.60%), hap4/hap4 (40.91%), hap2/hap4 (26.53%), hap2/hap5 (20.00%), respectively. The Jining Grey goat does with nine genotypes analyzed of POU1F1 gene showed no obvious difference in litter size.
- Published
- 2011
13. Polymorphisms of KiSS-1 and GPR54 genes and their relationships with litter size in sheep
- Author
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Chao-Ting Xiao, Mingxing Chu, Li Fang, T. Feng, Kui Li, Yuehui Ma, G. L. Cao, Yan Fu, D. W. Huang, Ning Li, R. Di, and Qianqian Tang
- Subjects
Candidate gene ,Genotype ,Litter Size ,Sequence analysis ,Molecular Sequence Data ,Mutation, Missense ,Single-nucleotide polymorphism ,Biology ,Polymerase Chain Reaction ,Polymorphism, Single Nucleotide ,Receptors, G-Protein-Coupled ,Exon ,Species Specificity ,Polymorphism (computer science) ,Genetics ,Animals ,Molecular Biology ,Gene ,Genetic Association Studies ,Polymorphism, Single-Stranded Conformational ,DNA Primers ,Kisspeptins ,Sheep ,Base Sequence ,Sequence Analysis, DNA ,General Medicine ,Molecular biology ,Genotype frequency ,Fertility ,Linear Models - Abstract
The KiSS-1 and GPR54 genes were studied as candidate genes for the prolificacy in sheep. Four pairs of primers were designed to detect single nucleotide polymorphisms of exon 1 of KiSS-1 gene and exon 1, exon 2 and partial exon 5 of GPR54 gene in high fecundity breeds (Small Tail Han and Hu sheep) and low fecundity breeds (Dorset, Texel and Corriedale sheep) by PCR-SSCP. Polymorphisms in exon 1 of KiSS-1 gene were detected in prolific Small Tail Han sheep (AA, AB and BB genotypes) and Hu sheep (AA and CC genotypes), no polymorphism was found in low fecundity sheep breeds (only AA genotype). Polymorphisms in exon 2 of GPR54 gene were detected in prolific Hu sheep (DD and EE genotypes) and no polymorphism was found in prolific Small Tail Han sheep and low fecundity sheep breeds (only DD genotype). No polymorphism was detected in exon 1 and partial exon 5 of GPR54 gene in five sheep breeds. The polymorphic genotypes were sequenced. While compared the BB genotype with the AA genotype, one nucleotide mutation (G1035A) was detected, which resulted in amino acid change, Val25Met. Five nucleotide mutations were detected from AA to CC genotype (C981T, C996T, T997C, C1034G, C1039T), and among them four caused amino acid changes, that is, Arg7Trp, Phe12Leu, Asn24Lys, Ala26Val. While compared the EE genotype with the DD genotype, two nucleotide mutations (T2360C, A2411C) were detected, which gave rise to amino acid changes, Met90Thr and Asp107Ala, respectively. Genotype frequencies of AA, BB and AB were 0.62, 0.05 and 0.33 in Small Tail Han sheep, respectively. The Small Tail Han sheep ewes with genotype BB or AB had 0.88 (P0.05) or 0.51 (P0.05) lambs more than those with genotype AA; the Small Tail Han sheep ewes with genotype BB had 0.37 (P0.05) lambs more than those with genotype AB. These results preliminarily indicated that the KiSS-1 gene may have some association with prolificacy in sheep.
- Published
- 2011
14. Polymorphisms of coding region of BMPR-IB gene and their relationship with litter size in sheep
- Author
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Lihua Jia, L. Fang, Yuehui Ma, M. X. Chu, Yingjie Zhang, T. Feng, Kui Li, R. Di, Mei Jin, Hong-Quan Chen, G. L. Cao, and Qianqian Tang
- Subjects
Genetics ,Candidate gene ,Sheep ,Litter Size ,Single-nucleotide polymorphism ,Single-strand conformation polymorphism ,General Medicine ,Breeding ,Biology ,Polymorphism, Single Nucleotide ,Molecular biology ,Major gene ,Breed ,law.invention ,Open Reading Frames ,Gene Frequency ,Genetic marker ,law ,Animals ,Coding region ,Least-Squares Analysis ,Molecular Biology ,Bone Morphogenetic Protein Receptors, Type I ,Polymerase chain reaction - Abstract
The bone morphogenetic protein receptor IB (BMPR-IB) was studied as a candidate gene for the prolificacy of sheep. Nine pairs of primers (P1-P9) were designed to detect single nucleotide polymorphisms (SNPs) of exons 1-4 and 6-10 of the BMPR-IB gene in both high (Small Tail Han and Hu sheep) and low prolificacy breeds (Texel and Chinese Merino sheep) by polymerase chain reaction (PCR)-single strand conformation polymorphism (SSCP). Only the products amplified by primers P2, P5, P6, P7, P8 and P9 displayed polymorphisms. The present study identified 22 SNPs in partial coding regions of ovine BMPR-IB, in which 20 SNPs were reported for the first time. In total of the 22 mutations, 18 DNA variations were originated from the Hu breed, three were found in the Small Tail Han breed (two of them were found in other sheep breeds), three in the Chinese Merino breed, and none in the Texel breed. These results preliminarily demonstrated that BMPR-IB is a major gene affecting the hyperprolificacy in Small Tail Han and Hu sheep, and could be used as a molecular genetic marker for early auxiliary selection for hyperprolificacy in sheep.
- Published
- 2010
15. Trace determination of dichlorvos in environmental samples by room temperature ionic liquid-based dispersive liquid-phase microextraction combined with HPLC
- Author
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Qianqian Tang, Songhui Wang, and Bingren Xiang
- Subjects
Liquid Phase Microextraction ,Rain ,Analytical chemistry ,Disperser ,Sodium Chloride ,High-performance liquid chromatography ,Analytical Chemistry ,chemistry.chemical_compound ,Furans ,Tetrahydrofuran ,Chromatography, High Pressure Liquid ,Detection limit ,Chromatography ,Drinking Water ,Extraction (chemistry) ,Imidazoles ,Pesticide Residues ,Reproducibility of Results ,General Medicine ,Hydrogen-Ion Concentration ,Solvent ,chemistry ,Ionic liquid ,Dichlorvos ,Enrichment factor ,Water Pollutants, Chemical - Abstract
Using 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM] [PF6]) room temperature ionic liquid (RTIL) as extraction solvent, tetrahydrofuran (THF) as disperser solvent, the organophosphorus pesticide dichlorvos in water was determined by dispersive liquid‐ liquid microextraction (DLLME) combined with high-performance liquid chromatography. Factors affecting RTIL‐DLLME (type of disperser solvent, amount of RTIL, volume of disperser solvent, percentage of NaCl and volume and pH of water sample) were optimized by the single-factor method, obtaining the most favorable results when using 65 mL of [BMIM][PF6] and 260 mL of THF to extract the compound from an 8-mL water sample at pH 5.0 containing 25% (w/v) of NaCl. Under these optimum conditions, an enrichment factor of 215-fold was obtained. The calibration curves were linear in the concentration range of 2‐1,000 mg/L. The limit of detection calculated at a signal-to-noise ratio of 3 was 0.2 mg/L. The relative standard deviations (RSD) for six replicate experiments at 20, 100 and 200 mg/L concentration levels were 1.8%, 1.3% and 1.3 %, respectively. Then the proposed method was applied to the analysis of three different water sample sources (tap, farm and rain water) and the relative recoveries and RSD of spiked water samples were 95.6‐102.4% and 0.6‐3.1%, respectively, at three different concentration levels of 20, 100 and 200 mg/L.
- Published
- 2012
16. Polymorphism of 5' regulatory region of ovine FSHR gene and its association with litter size in Small Tail Han sheep
- Author
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Kui Li, D. W. Huang, G. L. Cao, Y. Li, R. Di, Qianqian Tang, Xin Guo, C. J. Feng, T. Feng, Yuehui Ma, L. Fang, and M. X. Chu
- Subjects
Litter (animal) ,Tail ,China ,DNA, Complementary ,Genotype ,Litter Size ,Molecular Sequence Data ,Single-nucleotide polymorphism ,Biology ,Breeding ,Regulatory Sequences, Nucleic Acid ,Polymerase Chain Reaction ,Polymorphism, Single Nucleotide ,Gene Frequency ,Polymorphism (computer science) ,Genetics ,Animals ,Least-Squares Analysis ,Corriedale ,Molecular Biology ,Gene ,Allele frequency ,Genetic Association Studies ,Polymorphism, Single-Stranded Conformational ,Sheep, Domestic ,Base Sequence ,General Medicine ,Sequence Analysis, DNA ,Molecular biology ,Receptors, FSH ,Primer (molecular biology) - Abstract
Single nucleotide polymorphisms of 5' regulatory region of follicle-stimulating hormone receptor (FSHR) gene were detected in two high prolificacy sheep breeds (Small Tail Han and Hu sheep) and two low prolificacy sheep breeds (Corriedale and Chinese Merino sheep) by polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP). The results indicated that there were three genotypes (AA, AB and BB) detected by primer 1 in Hu sheep while only one genotype (AA) in other three sheep breeds, and frequencies of AA, AB and BB genotypes in Hu sheep were 0.700, 0.225 and 0.075, respectively. There were three genotypes (EE, EF and EG) detected by primer 3 in Small Tail Han sheep while only EE genotype occurred in other three sheep breeds, and frequencies of EE, EF and EG genotypes in Small Tail Han sheep were 0.775, 0.200 and 0.025, respectively. No polymorphism was detected in four sheep breeds by primer 2 and primer 4. The sequencing results showed that there were two nucleotide mutations (g. -681T>C and g. -629C>T) in genotype BB compared with AA for primer 1. As for primer 3, two mutations (g. -197G>A and g. -98T>C) in genotype EF compared with EE and two mutations (g. -200G>A and g. -197G>A) in genotype EG compared with EE. The heterozygous ewes with EG or EF had 0.89 (P
- Published
- 2011
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