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Total 442 results found since Jan 2013.
TBX3 deficiency accelerates apoptosis in cardiomyoblasts through regulation of P21 expression
In conclusion, we demonstrated that TBX3 deficiency accelerated apoptosis via directly regulating P21 expression in senescent cardiomyoblasts.
Source: Life Sciences - November 6, 2019 Category: Biology Source Type: research
Elevated levels of 15-lipoxygenase-1 contribute to the abnormal phenotypes of osteoblasts in human osteoarthritis
In conclusion, our results suggested that the expression of 15-LOX-1 on osteoblasts from the subchondral bone increased in OA. 15-LOX-1 inhibited autophagy by activated mTORC1, which in turn upregulated the markers of abnormal osteoblast phenotypes RUNX2, COL1, and OCN.
Source: Life Sciences - November 6, 2019 Category: Biology Source Type: research
Network-based analysis of prostate cancer cell lines reveals novel marker gene candidates associated with radioresistance and patient relapse
by Michael Seifert, Claudia Peitzsch, Ielizaveta Gorodetska, Caroline B örner, Barbara Klink, Anna Dubrovska
Radiation therapy is an important and effective treatment option for prostate cancer, but high-risk patients are prone to relapse due to radioresistance of cancer cells. Molecular mechanisms that contribute to radioresistance are not fully understood. Novel computational strategies are needed to i dentify radioresistance driver genes from hundreds of gene copy number alterations. We developed a network-based approach based on lasso regression in combination with network propagation for the analysis of prostate can...
Source: PLoS Computational Biology - November 3, 2019 Category: Biology Authors: Michael Seifert Source Type: research
The nuclear transcription factor FoxG1 affects the sensitivity of mimetic aging hair cells to inflammation by regulating autophagy pathways
In this study, we first found that FoxG1 expression and autophagy both increased gradually in the low concentration lipopolysaccharide (LPS)-induced inflammation model, while after high concentration of LPS treatment both FoxG1 expression and autophagy levels decreased as the concentration of LPS increased. We then used siRNA to downregulate Foxg1 expression in hair cell-like OC-1 cells and found that cell death and apoptosis were significantly increased after LPS injury. Furthermore, we used d-galactose (D-gal) to create an aging model with hair cell-like OC-1 cells and cochlear explant cultures in vitro and found tha...
Source: Redox Biology - October 29, 2019 Category: Biology Source Type: research
Abnormal thyroid hormone receptor signaling in osteoarthritic osteoblasts regulates microangiogenesis in subchondral bone
Publication date: Available online 22 October 2019Source: Life SciencesAuthor(s): Li Lei, Meng Li, Yiqun Pang, Jun Wang, Yunpeng Wan, Chen Zhu, Yin ZongshengAbstractAimsPrevious study indicated that the increase of local bio-availability of 3′3′5-triiodothyronine (T3) influenced osteoarthritis (OA) initiation. We aimed to investigate the role of thyroid hormone receptors (THRs) signaling in OA osteoblasts.Materials and methodsTHRs expression in OA was detected by immunohistochemistry, immunofluorescence, RT-qPCR and western blotting. These effects on the expression of angiogenesis-related factors were examined after TH...
Source: Life Sciences - October 23, 2019 Category: Biology Source Type: research
Acetyl-11-keto-β-boswellic acid regulates the repair of rat sciatic nerve injury by promoting the proliferation of Schwann cells
This study aimed to study the effects of acetyl-11-keto-β-boswellic acid (AKBA) on the regeneration of injured peripheral nerves and the ability of the extracellular signal-regulated kinase（ERK） signaling pathway to regulate the proliferation of Schwann cells and the formation of myelin.Main methodsA sciatic nerve crush injury model rats were randomly divided into the model control, low-, medium-, and high-dose AKBA groups. The repair of myelin damage was observed through Luxol Fast Blue staining and the expression of neurofilament-200 (NF200) protein was detected through immunohistochemical tests. The relative expres...
Source: Life Sciences - October 11, 2019 Category: Biology Source Type: research
Regulation of mitochondrial cristae remodelling by acetylcholine alleviates palmitate-induced cardiomyocyte hypertrophy.
This study investigated the role of cristae remodelling in palmitate (PA)-induced neonatal rat cardiomyocyte hypertrophy and explored the beneficial effects of ACh. We found loose, fragmented and even lysed cristae in PA-treated neonatal cardiomyocytes along with declines in mitochondrial network and complex expression and overproduction of mitochondrial reactive oxygen species (ROS); these changes ultimately resulted in increased myocardial size. Overexpression of mitofilin by adenoviral infection partly improved cristae shape, mitochondrial network, and ATP content and attenuated cell hypertrophy. Interestingly, siRNA-me...
Source: Free Radical Biology and Medicine - September 21, 2019 Category: Biology Authors: Xue RQ, Zhao M, Wu Q, Yang S, Cui YL, Yu XJ, Liu JK, Zang WJ Tags: Free Radic Biol Med Source Type: research
LncRNA RHPN1-AS1 promoted cell proliferation, invasion and migration in cervical cancer via the modulation of miR-299-3p/FGF2 axis
In conclusion, our results revealed that RHPN1-AS1 promoted cervical cancer progression via targeting miR-299-3p/FGF2 axis. Our data suggested that RHPN1-AS1/miR-299-3p/FGF2 axis may be a promising target for cervical cancer treatment.
Source: Life Sciences - September 14, 2019 Category: Biology Source Type: research
Depletion of CPEB1 protects against oxidized LDL-induced endothelial apoptosis and inflammation though SIRT1/LOX-1 signalling pathway
Publication date: Available online 12 September 2019Source: Life SciencesAuthor(s): Kaicheng Xu, Xiwen liu, Guanghao Ren, Dexin Yin, Suli Guo, Yue ZhaoAbstractAtherosclerosis (AS) is a chronic inflammatory disease that results from Oxidized low-density lipoprotein (Ox-LDL) induced endothelial dysfunction. Cytoplasmic polyadenylation element binding protein 1 (CPEB1) is closely related to the development of epithelial cells, but the role of CPEB1 in AS remains unknown. The RNA and protein levels of CPEB1 expression are increased by Ox-LDL exposure, which is abrogated by c-Jun amino-terminal kinase (JNK) inhibitor SP600125. ...
Source: Life Sciences - September 13, 2019 Category: Biology Source Type: research
Proteomics evaluation of MDA-MB-231 breast cancer cells in response to RNAi-induced silencing of hPTTG
This study aims to evaluate cell proliferation and the downstream expression pattern of hPTTG1 gene at the mRNA and protein levels after specific down-regulation of hPTTG1 by siRNA.Main methodsThe human breast cancer MDA-MB-231 cell line was transfected with siRNA against hPTTG1. The mRNA and protein expression levels were examined by Real-time PCR and Western blot, respectively. The cell proliferation was assayed by MTS. To investigate the pattern of protein expression, total cellular protein was analyzed by 2D gel electrophoresis and mass spectroscopy. Subsequently, the possible biological consequences were determined by...
Source: Life Sciences - September 13, 2019 Category: Biology Source Type: research
Circular RNA 4099 aggravates hydrogen peroxide-induced injury by down-regulating microRNA-706 in L02 cells
This study aimed to explore the roles and regulatory mechanisms of the circRNA-4099 in L02 cell line.Main methodsCells were induced with H2O2 dilutions and transfected with circRNA-4099 overproduction vectoer and the specific siRNA (si-circRNA-4099), as well as microRNA-706 (miR-706) mimic or the corresponding controls. Cell viability was detected with the CCK-8. The apoptotic rate was determined by the annexin v-FITC/PI with flow cytometer. The expression of circRNA-4099 or miR-706 was quantified depending on qRT-PCR. The reactive oxygen species (ROS) level was examined through ROS assay. The relative proteins were indivi...
Source: Life Sciences - September 1, 2019 Category: Biology Source Type: research
Downregulation of hsa_circ_0007534 restricts the proliferation and invasion of cervical cancer through regulating miR-498/BMI-1 signaling
Publication date: Available online 21 August 2019Source: Life SciencesAuthor(s): Xuan Rong, Wei Gao, Xiaomei Yang, Junjun GuoAbstractAimsHsa_circ_0007534 has been reported to be a novel cancer-related circRNA affecting multiple cancers. However, little is known about the role of hsa_circ_0007534 in cervical cancer specifically. In the current study, we aimed to explore the expression and function of hsa_circ_0007534 in cervical cancer.Main methodsThe expression of circRNA, miRNA and mRNA was measured using real-time quantitative polymerase chain reactions. Protein expression was assessed by Western blot. Knockdown of has_c...
Source: Life Sciences - August 22, 2019 Category: Biology Source Type: research
Functional characterization of seven-band grouper immunoglobulin like cell adhesion molecule, Nectin4 as a cellular receptor for nervous necrosis virus
Publication date: October 2019Source: Fish & Shellfish Immunology, Volume 93Author(s): Rahul Krishnan, Syed Shariq Nazir Qadiri, Myung-Joo OhAbstractNectin-4/PVRL4 belonging to the family of immunoglobulin-like cell adhesion molecules was identified as a potential cellular receptor for several animal viruses. Here we show that nervous necrosis virus that causes viral nervous necrosis in teleosts uses the same receptor in its life cycle. Transfection of SSN-1 cell lines with an expression vector encoding Nectin-4 rendered them to be more susceptible to NNV. Immunofluorescence microscopy on Nectin-4 expressing cells reveal...
Source: Fish and Shellfish Immunology - August 20, 2019 Category: Biology Source Type: research
Klotho improves diabetic cardiomyopathy by suppressing the NLRP3 inflammasome pathway
Publication date: Available online 15 August 2019Source: Life SciencesAuthor(s): Xuelian Li, Zhiyang Li, Bingong Li, Xianjie Zhu, Xingjun LaiAbstractAimsNLRP3 inflammasome activation is essential for the development and prognosis of diabetic cardiomyopathy (DCM). The anti-aging protein Klotho is suggested to modulate tissue inflammatory responses. The aim of the present study was to examine the protective effects of Klotho on DCM.Main methodsA streptozotocin-induced diabetes mouse model was established to assess the effects of Klotho in vivo, which was administered for 12 weeks. The characteristics of type 1 DCM were eva...
Source: Life Sciences - August 18, 2019 Category: Biology Source Type: research
Zinc supplementation alleviates OTA-induced oxidative stress and apoptosis in MDCK cells by up-regulating metallothioneins
Publication date: Available online 5 August 2019Source: Life SciencesAuthor(s): Hu Li, Rahmani Mohammad Malyar, Nianhui Zhai, Hong Wang, Kai Liu, Dandan Liu, Cuiling Pan, Fang Gan, Kehe Huang, Jinfeng Miao, Xingxiang ChenAbstractAimsThe present study was to investigate the protective effects of Zn supplementation in OTA-induced apoptosis of Madin-Darby canine kidney (MDCK) epithelial cells and explore the potential mechanisms. Aiming to provides a new insight into the treatment strategy of OTA-induced nephrotoxicity by nutritional regulation.Main methodsInitially, through MTT and LDH assay revealed that Zn supplementation ...
Source: Life Sciences - August 18, 2019 Category: Biology Source Type: research
