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https://www.readbyqxmd.com/read/28942831/effect-of-tetramethylpyrazine-combined-with-cisplatin-on-vegf-klf4-and-adamts1-in-lewis-lung-cancer-mice
#1
Jian-Hua Tang, He-Min Zhang, Zhi-Hua Zhang, Xiu-Long Zhang
OBJECTIVE: To further explore the function of combine use of tetramethylpyrazine (TMP) and cisplatin (DDP) in lung carcinoma. METHODS: We used the combination drug to treat Lewis lung cancer mice, investigated the expression level of vascular endothelial growth factor (VEGF), Kruppel-like factor 4 (KLF4) and A disintegrin and metalloproteinase with thrombospondin motifs 1 (ADAMTS1) and to further explore the inhibitory effects and potential mechanism of TMP combined with DDP on tumor angiogenesis...
August 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28938633/mir-543-promotes-colorectal-cancer-proliferation-and-metastasis-by-targeting-klf4
#2
Fangbing Zhai, Chunhong Cao, Liang Zhang, Jianhua Zhang
Till now, miR-543 expression has been demonstrated to be involved in the development of some cancers. However, reports about its expression and mechanism in colorectal cancer (CRC) were conflicting [1, 2]. Here, we investigated clinical implications of miR-543 and mechanisms underlying miR-543-mediated CRC development. In this study, real-time quantitative PCR (qRT-PCR) validated miR-543 was highly expressed in CRC samples and cell lines. MiR-543 was closely associated with tumor size, TNM stage and metastasis...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28925366/establishment-of-a-human-ipsc-line-iishdoi001-a-from-a-patient-with-mcardle-disease
#3
María Del Carmen Ortuño-Costela, Nathalie Rodríguez-Mancera, Marta García-López, Francisco Zurita-Díaz, Ana Moreno-Izquierdo, Alejandro Lucía, Miguel Ángel Martín, Rafael Garesse, M Esther Gallardo
Human iPSC line IISHDOi001-A was generated from fibroblasts of a patient with McArdle disease harbouring the mutation, c.148C>T; p.Arg50Ter, in the PYGM gene. Reprogramming factors Oct3/4, Sox2, Klf4, and c-Myc were delivered using Sendai virus.
August 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28925364/generation-and-characterization-of-a-human-ipsc-line-from-a-patient-with-propionic-acidemia-due-to-defects-in-the-pcca-gene
#4
Esmeralda Alonso-Barroso, Sandra Brasil, Álvaro Briso-Montiano, Rosa Navarrete, Celia Pérez-Cerdá, Magdalena Ugarte, Belén Pérez, Lourdes R Desviat, Eva Richard
Human induced pluripotent stem cell (iPSC) line was generated from fibroblasts of a patient with propionic acidemia carrying mutations in the PCCA gene: c.1899+4_1899+7delAGTA; p.(Cys616_Val633del) and c.1430--?_1643+?del; p.(Gly477Glufs*9). Reprogramming factors OCT3/4, SOX2, KLF4 and c-MYC were delivered using a non-integrative method based on the Sendai virus. Once established, iPSCs have shown full pluripotency, differentiation capacity and genetic stability.
August 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28920957/klf4-dependent-perivascular-cell-plasticity-mediates-pre-metastatic-niche-formation-and-metastasis
#5
Meera Murgai, Wei Ju, Matthew Eason, Jessica Kline, Daniel W Beury, Sabina Kaczanowska, Markku M Miettinen, Michael Kruhlak, Haiyan Lei, Jack F Shern, Olga A Cherepanova, Gary K Owens, Rosandra N Kaplan
A deeper understanding of the metastatic process is required for the development of new therapies that improve patient survival. Metastatic tumor cell growth and survival in distant organs is facilitated by the formation of a pre-metastatic niche that is composed of hematopoietic cells, stromal cells and extracellular matrix (ECM). Perivascular cells, including vascular smooth muscle cells (vSMCs) and pericytes, are involved in new vessel formation and in promoting stem cell maintenance and proliferation. Given the well-described plasticity of perivascular cells, we hypothesized that perivascular cells similarly regulate tumor cell fate at metastatic sites...
September 18, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28920531/role-of-kr%C3%A3-ppel-like-factor-4-in-the-maintenance-of-chemoresistance-of-anaplastic-thyroid-cancer
#6
Su In Lee, Dae Kyoung Kim, Eun Jin Seo, Eun Jung Choi, Yang Woo Kwon, Il Ho Jang, Jin Choon Lee, Hyun Yul Kim, Minho Shong, Jae Ho Kim, Seong-Jang Kim
BACKGROUND: Anaplastic thyroid cancer (ATC) has a very poor prognosis due to its aggressive nature and resistance to conventional treatment. Radiotherapy and chemotherapy are not fully effective because of the undifferentiated phenotype and enhanced drug resistance of ATC. The objective of this study was to evaluate the involvement of Krüppel-like factor 4 (KLF4), a stemness-associated transcription factor, in the undifferentiated phenotype and drug resistance of ATC. METHODS: ATC cells were compared with papillary thyroid cancer cells in drug resistance and gene expression...
September 16, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28916725/characterization-of-enhancers-and-the-role-of-the-transcription-factor-klf7-in-regulating-corneal-epithelial-differentiation
#7
Rachel Herndon Klein, William Hu, Ghaidaa Kashgari, Ziguang Lin, Tuyen Nguyen, Michael Doan, Bogi Andersen
During tissue development, transcription factors bind regulatory DNA regions called enhancers, often located at great distances from the genes they regulate, to control gene expression. The enhancer landscape during embryonic stem cell differentiation has been well characterized. By contrast, little is known about the shared and unique enhancer regulatory mechanisms in different ectodermally derived epithelial cells. Here, we use ChIP-seq to identify domains enriched for histone marks H3K4me3, H3K4me1, and H3K27ac, and define for the first time the super enhancers and typical enhancers active in primary human corneal epithelial cells...
September 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28910443/spatiotemporally-controlled-ablation-of-klf5-results-in-dysregulated-epithelial-homeostasis-in-adult-mouse-corneas
#8
Chelsea L Loughner, Anil Tiwari, Doreswamy Kenchegowda, Sudha Swamynathan, Shivalingappa K Swamynathan
Purpose: Corneal epithelial (CE) homeostasis requires coordination between proliferation and differentiation. Here we examine the role of cell proliferation regulator Krüppel-like factor 5 (Klf5) in adult mouse CE homeostasis. Methods: Klf5 was ablated in a spatiotemporally restricted manner by inducing Cre expression in 8-week-old ternary transgenic Klf5LoxP/LoxP/Krt12rtTA/rtTA/Tet-O-Cre (Klf5Δ/ΔCE) mouse CE by administering doxycycline via chow. Normal chow-fed ternary transgenic siblings served as controls...
September 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28901666/clinicopathological-and-molecular-characteristics-of-pediatric-meningiomas
#9
Sudha Battu, Anupam Kumar, Pankaj Pathak, Suvendu Purkait, Linchi Dhawan, Mehar C Sharma, Ashish Suri, Manmohan Singh, Chitra Sarkar, Vaishali Suri
Molecular and clinical characteristics of pediatric meningiomas are poorly defined. Therefore, we analyzed clinical, morphological and molecular profiles of pediatric meningiomas. Forty pediatric meningiomas from January 2002 to June 2015 were studied. 1p36, 14q32 and 22q-deletion were assessed by fluorescent in situ hybridization and mutations of most relevant exons of AKT, SMO, KLF4, TRAF and pTERT using sequencing. Expression of GAB1, stathmin, progesterone receptor (PR), p53 along with MIB-1 LI was examined using immunohistochemistry...
September 13, 2017: Neuropathology: Official Journal of the Japanese Society of Neuropathology
https://www.readbyqxmd.com/read/28898112/functional-odontoblastic-like-cells-derived-from-human-ipscs
#10
H Xie, N Dubey, W Shim, C J A Ramachandra, K S Min, T Cao, V Rosa
The induced pluripotent stem cells (iPSCs) have an intrinsic capability for indefinite self-renewal and large-scale expansion and can differentiate into all types of cells. Here, we tested the potential of iPSCs from dental pulp stem cells (DPSCs) to differentiate into functional odontoblasts. DPSCs were reprogrammed into iPSCs via electroporation of reprogramming factors OCT-4, SOX2, KLF4, LIN28, and L-MYC. The iPSCs presented overexpression of the reprogramming genes and high protein expressions of alkaline phosphatase, OCT4, and TRA-1-60 in vitro and generated tissues from 3 germ layers in vivo...
September 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28893694/altered-expression-of-microrna-15a-and-kruppel-like-factor-4-in-cerebrospinal-fluid-and-plasma-after-aneurysmal-subarachnoid-hemorrhage
#11
Yuichiro Kikkawa, Takeshi Ogura, Hiroyuki Nakajima, Toshiki Ikeda, Ririko Takeda, Hiroaki Neki, Shinya Kohyama, Fumitaka Yamane, Ryota Kurogi, Toshiyuki Amano, Akira Nakamizo, Masahiro Mizoguchi, Hiroki Kurita
BACKGROUND: Cerebral vasospasm (CVS) is a major determinant of prognosis in patients with subarachnoid hemorrhage (SAH). Alteration in the vascular phenotype contributes to development of CVS. However, little is known about the role of microRNAs (miRNAs) in the phenotypic alteration after SAH. We investigated the expression profile of miRNAs and the chronological changes in the expression of microRNA-15a (miR-15a) and Kruppel-like factor 4 (KLF4), a potent regulator of vascular phenotype modulation that modulates the expression of miR-15a, in the plasma and cerebrospinal fluid (CSF) of SAH patients...
September 8, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28889080/reprogramming-of-rabbit-induced-pluripotent-stem-cells-toward-epiblast-and-chimeric-competency-using-kr%C3%A3-ppel-like-factors
#12
Yann Tapponnier, Marielle Afanassieff, Irène Aksoy, Maxime Aubry, Anaïs Moulin, Lucas Medjani, Wilhelm Bouchereau, Chloé Mayère, Pierre Osteil, Jazmine Nurse-Francis, Ioannis Oikonomakos, Thierry Joly, Luc Jouneau, Catherine Archilla, Barbara Schmaltz-Panneau, Nathalie Peynot, Harmonie Barasc, Alain Pinton, Jérome Lecardonnel, Elen Gocza, Nathalie Beaujean, Véronique Duranthon, Pierre Savatier
Rabbit induced pluripotent stem cells (rbiPSCs) possess the characteristic features of primed pluripotency as defined in rodents and primates. In the present study, we reprogrammed rbiPSCs using human Krüppel-like factors (KLFs) 2 and 4 and cultured them in a medium supplemented with fetal calf serum and leukemia inhibitory factor. These cells (designated rbEKA) were propagated by enzymatic dissociation for at least 30 passages, during which they maintained a normal karyotype. This new culturing protocol resulted in transcriptional and epigenetic reconfiguration, as substantiated by the expression of transcription factors and the presence of histone modifications associated with naïve pluripotency...
September 5, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28888043/sirt1-deacetylates-klf4-to-activate-claudin-5-transcription-in-ovarian-cancer-cells
#13
Xinjian Zhang, Junliang Chen, Lina Sun, Yong Xu
Malignant cancers are distinguished from more benign forms of cancers by enhanced ability to disseminate. A number of factors aid the migration and invasion of malignant cancer cells. Epithelial-to-mesenchymal transition (EMT), which greatly facilitates the dissemination of cancer cells, is characterized by the loss of epithelial markers and the acquisition of mesenchymal markers thereby rendering the cells more migratory and invasive. We have previously shown that the class III lysine deacetylase SIRT1 plays a critical role curbing the metastasis of ovarian cancer cells partly by blocking EMT...
September 9, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28882480/short-term-administration-of-nicotinamide-mononucleotide-preserves-cardiac-mitochondrial-homeostasis-and-prevents-heart-failure
#14
Rongli Zhang, Yuyan Shen, Lin Zhou, Panjamaporn Sangwung, Hisashi Fujioka, Lilei Zhang, Xudong Liao
Heart failure is associated with mitochondrial dysfunction so that restoring or improving mitochondrial health is of therapeutic importance. Recently, reduction in NAD(+) levels and NAD(+)-mediated deacetylase activity has been recognized as negative regulators of mitochondrial function. Using a cardiac specific KLF4 deficient mouse line that is sensitive to stress, we found mitochondrial protein hyperacetylation coupled with reduced Sirt3 and NAD(+) levels in the heart before stress, suggesting that the KLF4-deficient heart is predisposed to NAD(+)-associated defects...
September 5, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28867182/deficiency-of-klf4-compromises-the-lung-function-in-an-acute-mouse-model-of-allergic-asthma
#15
Jeanette A Nimpong, Wintana Gebregziabher, Udai P Singh, Prakash Nagarkatti, Mitzi Nagarkatti, Johnie Hodge, Chunming Liu, Daping Fan, Walden Ai
Asthma is a chronic inflammatory disease of the airways and the mechanisms are not fully understood. Myeloid-derived suppressor cells (MDSCs) are a heterogeneous group of monocytes, granulocyte and myeloid cells at early stage of differentiation. They possess phenotypic plasticity and regulate airway inflammation. We recently reported that Kruppel-like factor 4 (KLF4) regulates MDSC differentiation into fibrocytes, emerging effectors in chronic inflammation. However, the role of KLF4 in asthma is not known...
August 31, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28863999/isolation-and-characterization-of-the-trophectoderm-from-the-arabian-camel-camelus-dromedarius
#16
Islam M Saadeldin, Ayman Abdel-Aziz Swelum, Mona Elsafadi, Abdullah F Moumen, Faisal A Alzahrani, Amer Mahmood, Musaad Alfayez, Abdullah N Alowaimer
We isolated and characterized trophoblast from in vivo-derived camel embryos and compared with embryonic stem-like cells. Camel embryos were flushed on day 8 post-insemination and used to derive trophectoderm and embryonic stem-like cells under feeder-free culture conditions using a basement membrane matrix. Embryos were evaluated for the expression of POU5F1, MYC, KLF4, SOX2, CDX2, and KRT8 mRNA transcripts by relative quantitative polymerase chain reaction. Camel embryos grew and expanded to ∼4.5 mm and maintained their vesicular shape in vitro for 21 days post-insemination...
September 2017: Placenta
https://www.readbyqxmd.com/read/28856432/kruppel-like-factor-4-regulates-matrix-metalloproteinase-and-aggrecanase-gene-expression-in-chondrocytes
#17
Junji Fujikawa, Yuto Takeuchi, Satoshi Kanazawa, Ahmed G Nomir, Akiyoshi Kito, Eman Elkhashab, Amr M Ghaleb, Vincent W Yang, Shigehisa Akiyama, Ichijiro Morisaki, Takashi Yamashiro, Satoshi Wakisaka, Makoto Abe
Kruppel-like factor 4 (KLF4) is a zinc finger transcription factor that plays crucial roles during the development and maintenance of multiple organs. We and others have previously shown that KLF4 is involved in bone modeling and remodeling but roles played by KLF4 during skeletogenesis are still not fully understood. Here, we show that KLF4 is expressed in the epiphyseal growth plate and articular chondrocytes. Most articular chondrocytes expressed KLF4 in embryos but it localized only in a subset of superficial zone cells in postnatal mice...
August 31, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28853082/reprogramming-of-human-retinal-pigment-epithelial-cells-under-the-effect-of-bfgf-in-vitro
#18
E V Shafei, A M Kurinov, A V Kuznetsova, M A Aleksandrova
We studied the effect of bFGF on human retinal pigment epithelial cells in vitro In ARPE-19 cells, enhanced expression of KLF4 mRNA and reduced expression of PAX6, MITF, and OTX2 mRNA specific for retinal pigment epithelium were observed after bFGF application. The expression of KLF4 mRNA peaked in 72 h after bFGF application and then sharply decreased, which was accompanied by a 3-fold increase in TUBB3 mRNA expression (neuronal marker). Immunocytochemical analysis showed that in the presence of bFGF, some cells retained epithelial properties and showed positive staining for connexin-43, while others had long axon-like processes and demonstrated positive staining for βIII-tubulin, which attests to their neuronal transdifferentiation...
August 29, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28851732/interferon-regulatory-factor-4-inhibits-neointima-formation-by-engaging-klf4-signaling
#19
Wen-Lin Cheng, Zhi-Gang She, Juan-Juan Qin, Jun-Hong Guo, Fu-Han Gong, Peng Zhang, Chun Fang, Song Tian, Xue-Yong Zhu, Jun Gong, Zhi-Hua Wang, Zan Huang, Hongliang Li
Background -The mechanisms underlying neointima formation remain unclear. Interferon regulatory factors (IRFs), which are key innate immune regulators, play important roles in cardiometabolic diseases. However, the function of IRF4 in arterial restenosis is unknown. Methods -IRF4 expression was first detected in human and mouse restenotic arteries. Then, the effects of IRF4 on neointima formation were evaluated using universal IRF4-deficient mouse and rat carotid artery injury models. We performed immunostaining to identify IRF4-expressing cells in the lesions...
August 29, 2017: Circulation
https://www.readbyqxmd.com/read/28846095/zscan10-expression-corrects-the-genomic-instability-of-ipscs-from-aged-donors
#20
Maria Skamagki, Cristina Correia, Percy Yeung, Timour Baslan, Samuel Beck, Cheng Zhang, Christian A Ross, Lam Dang, Zhong Liu, Simona Giunta, Tzu-Pei Chang, Joye Wang, Aparna Ananthanarayanan, Martina Bohndorf, Benedikt Bosbach, James Adjaye, Hironori Funabiki, Jonghwan Kim, Scott Lowe, James J Collins, Chi-Wei Lu, Hu Li, Rui Zhao, Kitai Kim
Induced pluripotent stem cells (iPSCs), which are used to produce transplantable tissues, may particularly benefit older patients, who are more likely to suffer from degenerative diseases. However, iPSCs generated from aged donors (A-iPSCs) exhibit higher genomic instability, defects in apoptosis and a blunted DNA damage response compared with iPSCs generated from younger donors. We demonstrated that A-iPSCs exhibit excessive glutathione-mediated reactive oxygen species (ROS) scavenging activity, which blocks the DNA damage response and apoptosis and permits survival of cells with genomic instability...
September 2017: Nature Cell Biology
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