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Hongfang Guo, Rajwali Khan, Sayed Haidar Abbas Raza, Yue Ning, Dawei Wei, Sen Wu, Seyed Mahdi Hosseini, Irfan Ullah, Matthew D Garcia, Linsen Zan
The Krüppel-like factors (KLF) family plays an important role in adipogenesis, which is subject to internal hierarchical regulation. KLF3 is a member of KLF family, mainly responsible for adipocyte differentiation and fat deposition. However, the transcriptional regulation of bovine KLF3 gene and its relationship with KLF15 gene remains unclear during bovine adipogenesis. Here, we report that the expression pattern of KLF3 and KLF15 genes during bovine adipogenesis, when KLF15 gene was overexpressed through adenoviral vector (Ad-KLF15) in bovine adipocytes the expression level of KLF3 gene was increased, similarly when KLF15 was down regulated through siRNA the expression level of KLF3 was also reduced...
March 15, 2018: Gene
Leila Mousazadeh, Effat Alizadeh, Nosratollah Zarghami, Shahryar Hashemzadeh, Sedigheh Fekri Aval, Leili Hasanifard, Roya Herizchi
BACK GROUND: Adipose tissue derived mesenchymal stem cells (ASCs) have unique potential for regenerative cell therapies. However, during ex-vivo cultivation, they undergo considerable quality loss regarding their phenotypic properties, stemness genes expression and differentiation potential. Recent studies reported that the loss of stemness properties of MSCs is a result of chromatin histone deacetylations through in-vitro cultivation. The present work aimed to study the effect of Trapoxin A (TPX) as a histone deacetylase inhibitor (HDACi) on overall stemness properties of ASCs...
February 26, 2018: Drug Research
Chavali Kavyasudha, Dannie Macrin, K N ArulJothi, Joel P Joseph, M K Harishankar, Arikketh Devi
In an adult human body, somatic stem cells are present in small amounts in almost all organs with the function of general maintenance and prevention of premature aging. But, these stem cells are not pluripotent and are unable to regenerate large cellular loss caused by infarctions or fractures especially in cells with limited replicative ability such as neurons and cardiomyocytes. These limitations gave rise to the idea of inducing pluripotency to adult somatic cells and thereby restoring their regeneration, replication and plasticity...
February 27, 2018: Advances in Experimental Medicine and Biology
Aline F Ferreira, George A Calin, Virgínia Picanço-Castro, Simone Kashima, Dimas T Covas, Fabiola A de Castro
Although hematopoietic stem cell (HSC) therapy for hematological diseases can lead to a good outcome from the clinical point of view, the limited number of ideal donors, the comorbidity of patients and the increasing number of elderly patients may limit the application of this therapy. HSCs can be generated from induced pluripotent stem cells (iPSCs), which requires the understanding of the bone marrow and liver niches components and function in vivo iPSCs have been extensively applied in several studies involving disease models, drug screening and cellular replacement therapies...
February 21, 2018: Journal of Cell Science
Xin Men, Jun Ma, Tong Wu, Junyi Pu, Shaojia Wen, Jianfeng Shen, Xun Wang, Yamin Wang, Chao Chen, Penggao Dai
Tamoxifen (TAM) resistance is an important clinical problem in the treatment of breast cancer. In order to identify the mechanism of TAM resistance for estrogen receptor (ER)-positive breast cancer, we screened the transcriptome using RNA-seq and compared the gene expression profiles between the MCF-7 mamma carcinoma cell line and the TAM-resistant cell line TAMR/MCF-7, 52 significant differential expression genes (DEGs) were identified including SLIT2, ROBO, LHX, KLF, VEGFC, BAMBI, LAMA1, FLT4, PNMT, DHRS2, MAOA and ALDH...
January 9, 2018: Oncotarget
Katyana Kaline Silva Ferreira, Enéas Ricardo de Morais Gomes, José Luiz de Lima Filho, Carlos Henrique Madeiros Castelletti, Danyelly Bruneska Gondim Martins
Kruppel-like Factors (KLF) are responsible for regulating many genes involved in physiological and pathological processes. They are characterized by three conserved zinc-fingers in the DNA-binding domain, wherein mutations could affect the binding efficiency and transcription regulation. This study aimed to perform bioinformatics analysis to determine the most deleterious non-synonymous variants in KLFs involved in cardiac development and diseases, and their effects over the protein structure and stability...
January 31, 2018: Gene
Soudabe Yousefi, Jafar Soleimanirad, Kobra Hamdi, Laya Farzadi, Aalie Ghasemzadeh, Masoumeh Kazemi, Mahdi Mahdipour, Reza Rahbarghazi, Mohammad Nouri
This study aimed to develop an appropriate medium for preservation of multipotentiality in human granulosa cells. To compare the possible effect of different media supplemented with follicular fluid or fetal bovine serum, granulosa cells were cultured in vitro over a period of 14 days. Stemness feature and any alteration in the cell phenotype were monitored using colony count assay and flow cytometry analysis by monitoring the expression of Oct3/4 and GATA-4 factors. Transcript expression level of Sox-2, Klf-4, and Nanog were investigated using quantitative real-time PCR analysis...
February 2, 2018: Biologicals: Journal of the International Association of Biological Standardization
Chih-Ying Lin, Lih-Yuan Lin
Zinc finger (ZF) motifs on proteins are frequently recognized as a structure for DNA binding. Accumulated reports indicate that ZF motifs contain nuclear localization signal (NLS) to facilitate the transport of ZF proteins into nucleus. We investigated the critical factors that facilitate the nuclear transport of triple C2H2 ZF proteins. Three conserved basic residues (hot spots) were identified among the ZF sequences of triple C2H2 ZF proteins that reportedly have NLS function. Additional basic residues can be found on the α-helix of the ZFs...
2018: PloS One
Charlotte Flüh, Guranda Chitadze, Vivian Adamski, Kirsten Hattermann, Michael Synowitz, Dieter Kabelitz, Janka Held-Feindt
Glioblastoma multiforme (GBM) is a highly malignant brain tumor. Tumor stem cells have a major influence on tumor malignancy, and immunological escape mechanisms, involving the Natural Killer Group 2, member D (NKG2D) receptor-ligand-system, are key elements in tumor immuno-surveillance. We analyzed the expression profile and localization of NKG2D ligands (NKG2DL) and embryonic and neural stem cell markers in solid human GBM and stem-like cells isolated from glioma cell lines by qRT-PCR and immunohistochemistry, including quantitative analysis...
January 22, 2018: Histochemistry and Cell Biology
Lihua Gao, Hongmei Qiu, Jian Liu, Yuzhen Ma, Jia Feng, Li Qian, Jianguo Zhang, Yifei Liu, Tingting Bian
Lung adenocarcinoma (LADC)is a general form of non-small cell lung cancer that represents a significant threat to public health worldwide. The 5-year-survival rate for LADC is currently below 15%. The transcription factor KLF15, also called kidney-enriched KLF (KKLF), has been proven to play a role in inhibiting proliferation and diversification of carcinoma cells, including those of the endometrium, pancreas and breast, but the involvement of KLF15 in LADC has not previously been studied. In this study, we compared the in vitro expression of KLF15 in human LADC tissues and adjacent normal lung tissues...
December 15, 2017: Oncotarget
Cody J Wehrkamp, Sathish Kumar Natarajan, Ashley M Mohr, Mary Anne Phillippi, Justin L Mott
MicroRNA dysregulation is a common feature of cancer and due to the promiscuity of microRNA binding this can result in a wide array of genes whose expression is altered. miR-106b is an oncomiR overexpressed in cholangiocarcinoma and its upregulation in this and other cancers often leads to repression of anti-tumorigenic targets. The goal of this study was to identify the miR-106b-regulated gene landscape in cholangiocarcinoma cells using a genome-wide, unbiased mRNA analysis. Through RNA-Seq we found 112 mRNAs significantly repressed by miR-106b...
December 29, 2017: RNA Biology
Yachao Zhang, Jieqiong Yang, Shijian Lv, Dong-Qin Zhao, Zi-Jiang Chen, Wei-Ping Li, Cong Zhang
Preeclampsia (PE) is a pregnancy-induced disorder characterized by hypertension and proteinuria after 20 weeks of gestation, affecting 5-7% of pregnancies worldwide. So far, the etiology of PE remains poorly understood. Abnormal decidualization is thought to contribute to the development of PE. SP1 belongs to the Sp/KLF superfamily and can recruit P300 to regulate the transcription of several genes. SP1 is also very important for decidualization as it enhances the expression of tissue factor. In this study, we investigated the expression of SP1 and P300 in deciduae and their relationship with PE...
February 2018: Journal of Molecular Endocrinology
Yamin Zhang, Jing Zhu, Yaozhang Dai, Liuzhong Wang, Rui Liu
Skin fibroblasts and tumor fibroblasts were extracted from a 64-year old male patient clinically diagnosed with laryngeal carcinoma. Control and tumor specific induced pluripotent stem cells were reprogrammed with 5 reprogramming factors, Klf-4, c-Myc, Oct-4, Sox-2, and Lin-28, using the messenger RNA reprogramming system. The transgene-free iPSC lines showed pluripotency, confirmed by immunofluorescence staining. The iPSC lines also showed normal karyotype, and could form embryoid bodies in vitro and differentiate into the 3 germ layers in vivo...
December 2017: Stem Cell Research
Chunmei Wang, Liang Li, Qiuhui Duan, Qingqing Wang, Jinlian Chen
Krüppel-like factors (KLFs) are a large family of DNA-binding transcriptional regulators that affect basic cellular processes such as growth, survival, migration and differentiation and serve a complicated function in cancers. KLF2, one member of the KLF family, is dysregulated in many tumors. However, the specific role of KLF2 in human gastric tumorigenesis is unknown. Here we show that the expression of KLF2 protein was lower in gastric tumors when compared with adjacent normal tissue. Moreover, downregulated KLF2 expression in primary gastric tumor was closely correlated with patients' survival...
November 21, 2017: Oncotarget
Su Yu, Feng Wang, Xiao Tan, Guo-Li Gao, Wei-Juan Pan, Yi Luan, Xin Ge
FBW7, a key component of SCFFBW7 E3 ubiquitin ligase, targets various proteins for degradation via the conserved Cdc4 phosphodegron (CPD) in substrates. In this study, we report that KLF10 is degraded by FBW7 via a conserved CPD. Through systematic analysis of the degradation of KLF transcription factors by FBW7, we identified KLF10 as a novel degradation target of FBW7. Ectopic expression of FBW7 markedly promoted the degradation of KLF10 while knockdown of endogenous FBW7 increased the protein levels of KLF10...
January 8, 2018: Biochemical and Biophysical Research Communications
Eljo Y van Battum, Marieke G Verhagen, Vamshidhar R Vangoor, Yuki Fujita, Alwin A H A Derijck, Eoghan O'Duibhir, Giuliano Giuliani, Thijs de Gunst, Youri Adolfs, Daphne Lelieveld, David Egan, Roel Q J Schaapveld, Toshihide Yamashita, R Jeroen Pasterkamp
During embryonic development, axons extend over long distances to establish functional connections. In contrast, axon regeneration in the adult mammalian CNS is limited in part by a reduced intrinsic capacity for axon growth. Therefore, insight into the intrinsic control of axon growth may provide new avenues for enhancing CNS regeneration. Here, we performed one of the first miRNome-wide functional miRNA screens to identify miRNAs with robust effects on axon growth. High-content screening identified miR-135a and miR-135b as potent stimulators of axon growth and cortical neuron migration in vitro and in vivo in male and female mice...
January 17, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Xiangchen Gu, Dechao Xu, Lili Fu, Yi Wang, Changlin Mei, Xiang Gao
BACKGROUND/AIMS: Angiotensin II (Ang II) has been regarded as an important profibrogenic cytokine in renal fibrosis. Krüppel-like factor 15 (KLF15) has been identified as an important negative transcription factor in renal fibrosis. However, little is known about the role of KLF15 in Ang II-induced renal fibrosis. METHODS: In this study, we randomized mice into a control group, Ang II group or Ang II plus losartan group. KLF15 expression was examined with real-time PCR and immunofluorescence in these groups...
2017: Kidney & Blood Pressure Research
Zaraq Khan, Ye Zheng, Tiffanny L Jones, Abigail A Delaney, Luiz F Correa, Chandra C Shenoy, Khashayarsha Khazaie, Gaurang S Daftary
Increased toxicant exposure and resultant environmentally-induced diseases are a tradeoff of industrial productivity. Dioxin (TCDD: 2,3,7,8 tetrachlorodibenzo-p-dioxin), a ubiquitous by-product is associated with a spectrum of diseases including endometriosis, a common, chronic disease in women. TCDD activates cytochrome p450 (CYP) metabolic enzymes, which alters organ function to cause disease. In contrast, the transcription factor, Krüppel-Like Factor (KLF) 11 represses these enzymes via epigenetic mechanisms...
November 17, 2017: Endocrinology
Daniel Marrero-Rodríguez, Hugo Arreola-De la Cruz, Keiko Taniguchi-Ponciano, Laura Gomez-Virgilio, Victor Huerta-Padilla, Gustavo Ponce-Navarrete, Sergio Andonegui-Elguera, Florinda Jimenez-Vega, Pablo Romero-Morelos, Miriam Rodriguez-Esquivel, Marco Meraz-Rios, Ma Del Pilar Figueroa-Corona, Alberto Monroy, Oscar Pérez-González, Mauricio Salcedo
BACKGROUND AND AIMS: Krüppel Like Factors (KLF) refers to a family of seventeen members of transcription factors. Involved in several cellular processes. As other cancer types, Cervical Cancer (CC) presents molecular deregulations in transcription factors, but especially Human Papilloma Virus (HPV) sequences. Here in this work we analyzed the mRNA expression of all KLF family members in CC-derived cell lines and CC tissues. METHODS: The cell lines used were HeLa, INBL, RoVa, C4-I, Ms751, ViPa, CaLo, SiHa, CaSki, C33a and ViBo and the non-tumorigenic HaCaT...
May 2017: Archives of Medical Research
Eric Koesema, Thomas Kodadek
The orexins and their cognate G-protein coupled receptors have been widely studied due to their associations with various behaviors and cellular processes. However, the detailed downstream signaling cascades that mediate these effects are not completely understood. We report the generation of a neuronal model cell line that stably expresses the OX1 orexin receptor (OX1) and an RNA-Seq analysis of changes in gene expression seen upon receptor activation. Upon treatment with orexin, several families of related transcription factors are transcriptionally regulated, including the early growth response genes (Egr), the Kruppel-like factors (Klf), and the Nr4a subgroup of nuclear hormone receptors...
2017: PloS One
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