Characterization of Gonadotropin-Releasing Hormone Analogs Based on a Sensitive Cellular Luciferase Reporter Gene Assay

1997 ◽  
Vol 251 (1) ◽  
pp. 17-23 ◽  
Author(s):  
Thomas Beckers ◽  
Helmut Reiländer ◽  
Peter Hilgard
Keyword(s):  
Reporter Gene ◽  
Reporter Gene Assay ◽  
Gonadotropin Releasing Hormone ◽  
Luciferase Reporter ◽  
Luciferase Reporter Gene ◽  
Luciferase Reporter Gene Assay ◽  
Releasing Hormone ◽  
Gene Assay ◽  
Hormone Analogs

scholarly journals Identification of Alkaloids from Corydalis yanhusuo W. T. Wang as Dopamine D1 Receptor Antagonists by Using CRE-Luciferase Reporter Gene Assay

Molecules ◽  
2018 ◽  
Vol 23 (10) ◽  
pp. 2585 ◽  
Author(s):  
Lehao Wu ◽  
Weiyue Zhang ◽  
Xin Qiu ◽  
Chaoran Wang ◽  
Yanfang Liu ◽  
...  
Keyword(s):  
Dopamine Receptors ◽  
Reporter Gene ◽  
Reporter Gene Assay ◽  
D1 Receptor ◽  
Assay System ◽  
Luciferase Reporter ◽  
Luciferase Reporter Gene ◽  
Luciferase Reporter Gene Assay ◽  
Antagonistic Effects ◽  
Gene Assay

Corydalis yanhusuo W. T. Wang (C. yanhusuo) has been traditionally used for drug addiction and pain relief in China. In our previous study, we showed that the extract of C. yanhusuo blocks dopamine receptors, demonstrating that its pharmacological activities are mostly due to the antagonistic effects of some of its components at dopamine receptors. As part of our ongoing project on C. yanhusuo, the aim of the present study is to establish a high-throughput and low-cost screening assay system and test the abilities of the isolated alkaloids from C. yanhusuo to inhibit dopamine-induced dopamine D1 receptor activity. By using our established cyclic adenosine monophosphate (cAMP)-response element (CRE)-luciferase reporter gene assay system, we identified eight alkaloids from C. yanhusuo with D1 receptor antagonistic activities. We next validated the activities of these compounds using fluorometric imaging plate reader (FLIPR) assay by measuring the intracellular Ca2+ change. Six out of eight compounds, including tetrahydropalmatine, corydaline, 13-methyldehydrocorydalmine, dehydrocorybubine, dehydrocorydaline, and columbamine, can be confirmed for their inhibitory activities. The dopamine-receptor-antagonistic effects of four compounds, including 13-methyldehydrocorydalmine, dehydrocorydaline, columbamine, and corydaline, are reported for the first time. The present study provides an important pharmacological basis to support the traditional use of C. yanhusuo in China.

scholarly journals Circ_0000005 Facilitates Proliferation, Apoptosis, Migration and Invasion of Acute Myeloid Leukemia Cells via Modulating miR-139-5p/Tspan3 Axis

2020 ◽  
Author(s):  
Juan Tong ◽  
Huilan Liu ◽  
Changcheng Zheng ◽  
Xiaoyu Zhu ◽  
Xiang Wan ◽  
...  
Keyword(s):  
Western Blot ◽  
Cell Lines ◽  
Reporter Gene ◽  
Reporter Gene Assay ◽  
Luciferase Reporter ◽  
Regulatory Function ◽  
Luciferase Reporter Gene ◽  
Luciferase Reporter Gene Assay ◽  
Qrt Pcr ◽  
Gene Assay

Abstract Background: Accumulating circular RNAs (circRNAs) are reported to be abnormally expressed in diverse cancers, hematologic malignancies included. This study aimed to investigate the biological function and underlying mechanisms of circ_0000005 in acute myeloid leukemia (AML).Materials and methods: Bone marrow samples were enrolled from AML patients with normal samples as controls. Circ_0000005, miR-139-5p and tetraspanin 3 (Tspan3) were detected by qRT-PCR and Western blot, respectively. AML cell lines (KG1 and HL60) were used as cell models. CCK-8, Transwell and flow cytometry assays were adopted to study the biological functions of circ_0000005 on AML cells in vitro. The interrelation between circ_0000005 and miR-139-5p was detected by bioinformatics, qRT-PCR, luciferase reporter gene assay, RNA pull-down assay, and RNA-binding protein immunoprecipitation (RIP) assays. Ultimately, Western blot, qRT-PCR, luciferase reporter gene assay were adopted to corroborate the interrelation between miR-139-5p and its target Tspan3. Results: Circ_0000005 was demonstrably elevated in both AML clinical samples and cell lines. Circ_0000005 overexpression promoted the viability, migration and invasion of AML cells, and repressed the apoptosis of AML cells, while silencing circ_0000005 showed opposite biological effects. Circ_0000005 interacted with miR-139-5p and repressed its expression, and Tspan3 was proved to be negatively regulated by miR-139-5p. Circ_0000005 could promote the expression of Tspan3 via repressing miR-139-5p, and the oncogenic functions of circ_0000005 were dependent on its regulatory function on miR-139-5p/Tspan3 axis.Conclusion: Circ_0000005 facilitates the malignant phenotypes of AML cells via miR-139-5p/Tspan3 axis. Circ_0000005 may serve as a potential therapeutic target in AML.

Circular RNA CCDC66 Regulates Osteoarthritis Progression by Targeting miR-3622b-5p

Gerontology ◽  
2022 ◽  
pp. 1-11
Author(s):  
Chengyuan Zhang ◽  
Ye Lu ◽  
Feng Yuan ◽  
Shilin Jiang
Keyword(s):  
Reporter Gene ◽  
Bioinformatics Analysis ◽  
Reporter Gene Assay ◽  
Luciferase Reporter ◽  
Chondrocyte Apoptosis ◽  
Luciferase Reporter Gene ◽  
Luciferase Reporter Gene Assay ◽  
Tnf Α ◽  
Gene Assay ◽  
Sirt3 Expression

<b><i>Objective:</i></b> CircCCDC66 is involved in cancer progression, but its role in osteoarthritis (OA) remains unknown. This study was carried out to explore the biological role of circCCDC66 in OA and its underlying mechanism. <b><i>Methods:</i></b> The expression levels of miR-3622b-5p and circCCDC66 in OA cartilage tissues were detected by qRT-PCR. Cell Counting Kit-8 (CCK8) and flow cytometry were used to detect the chondrocyte viability and apoptosis. The expression of chondrocyte inflammatory factors (IL-6 and TNF-α) was measured by ELISA. The target genes of circCCDC66 and miR-3622b-5p were analyzed by bioinformatics analysis and luciferase reporter gene assay. The relationship between circCCDC66 and miR-3622b-5p was analyzed by bioinformatics analysis and luciferase reporter gene assay. <b><i>Results:</i></b> It was found that circCCDC66 expression in OA cartilage tissues was upregulated. CircCCDC66 overexpression inhibited proliferation and promoted apoptosis of chondrocytes and increased IL-6 and TNF-α levels in chondrocytes. miR-3622b-5p was predicted to be a downstream target gene of circCCDC66, and circCCDC66 overexpression inhibited miR-3622b-5p expression in chondrocytes. Moreover, miR-3622b-5p expression was downregulated in OA cartilage tissues. miR-3622b-5p overexpression increased chondrocyte proliferation, inhibited chondrocyte apoptosis, and enhanced the expression of IL-6 and TNF-α in chondrocytes. In addition, circCCDC66 overexpression enhanced SIRT3 expression in chondrocytes, while miR-3622b-5p overexpression inhibited SIRT3 expression in chondrocytes. <b><i>Conclusion:</i></b> CircCCDC66 promoted OA chondrocyte apoptosis by regulating the miR-3622b-5p/SIRT3 axis. CircCCDC66 may be a new therapeutic target of OA.

scholarly journals Comparative oxidative stress elicited by nanosilver in stable HSPA1A promoter-driven luciferase reporter HepG2 and A549 cells

2016 ◽  
Vol 5 (5) ◽  
pp. 1298-1305 ◽  
Author(s):  
Lili Xin ◽  
Jianshu Wang ◽  
Guoqiang Fan ◽  
Bizhong Che ◽  
Kaiming Cheng ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Reporter Gene ◽  
A549 Cells ◽  
Reporter Gene Assay ◽  
Luciferase Reporter ◽  
Luciferase Reporter Gene ◽  
Luciferase Reporter Gene Assay ◽  
Gene Assay

HSPA1A promoter-driven luciferase reporter gene assay provides a novel tool for predictive screening of the oxidative stress elicited by nanosilver.

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