keyword
MENU ▼
Read by QxMD icon Read
search

Cre/loxp

keyword
https://www.readbyqxmd.com/read/28722653/directing-visceral-white-adipocyte-precursors-to-a-thermogenic-adipocyte-fate-improves-insulin-sensitivity-in-obese-mice
#1
Chelsea Hepler, Mengle Shao, Jonathan Y Xia, Alexandra L Ghaben, Mackenzie J Pearson, Lavanya Vishvanath, Ankit X Sharma, Thomas S Morley, William L Holland, Rana K Gupta
Visceral adiposity confers significant risk for developing metabolic disease in obesity whereas preferential expansion of subcutaneous white adipose tissue (WAT) appears protective. Unlike subcutaneous WAT, visceral WAT is resistant to adopting a protective thermogenic phenotype characterized by the accumulation of Ucp1(+) beige/BRITE adipocytes (termed "browning"). In this study, we investigated the physiological consequences of browning murine visceral WAT by selective genetic ablation of Zfp423, a transcriptional suppressor of the adipocyte thermogenic program...
July 19, 2017: ELife
https://www.readbyqxmd.com/read/28715425/elimination-of-huntingtin-in-the-adult-mouse-leads-to-progressive-behavioral-deficits-bilateral-thalamic-calcification-and-altered-brain-iron-homeostasis
#2
Paula Dietrich, Irudayam Maria Johnson, Shanta Alli, Ioannis Dragatsis
Huntington's Disease (HD) is an autosomal dominant progressive neurodegenerative disorder characterized by cognitive, behavioral and motor dysfunctions. HD is caused by a CAG repeat expansion in exon 1 of the HD gene that is translated into an expanded polyglutamine tract in the encoded protein, huntingtin (HTT). While the most significant neuropathology of HD occurs in the striatum, other brain regions are also affected and play an important role in HD pathology. To date there is no cure for HD, and recently strategies aiming at silencing HTT expression have been initiated as possible therapeutics for HD...
July 17, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28707700/deleting-the-arntl-clock-gene-in-the-granular-layer-of-the-mouse-cerebellum-impact-on-the-molecular-circadian-clockwork
#3
Tenna Bering, Mikkel Bloss Carstensen, Martin Fredensborg Rath
The suprachiasmatic nucleus houses the central circadian clock and is characterized by the timely regulated expression of clock genes. However, neurons of the cerebellar cortex also contain a circadian oscillator with circadian expression of clock genes being controlled by the suprachiasmatic nucleus. It has been suggested that the cerebellar circadian oscillator is involved in food anticipation, but direct molecular evidence of the role of the circadian oscillator of the cerebellar cortex is currently unavailable...
July 14, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28705795/selective-deletion-of-leptin-signaling-in-endothelial-cells-enhances-neointima-formation-and-phenocopies-the-vascular-effects-of-diet-induced-obesity-in-mice
#4
Astrid Hubert, Magdalena L Bochenek, Eva Schütz, Rajinikanth Gogiraju, Thomas Münzel, Katrin Schäfer
OBJECTIVE: Obesity is associated with elevated circulating leptin levels and hypothalamic leptin resistance. Leptin receptors (LepRs) are expressed on endothelial cells, and leptin promotes neointima formation in a receptor-dependent manner. Our aim was to examine the importance of endothelial LepR (End.LepR) signaling during vascular remodeling and to determine whether the cardiovascular consequences of obesity are because of hyperleptinemia or endothelial leptin resistance. APPROACH AND RESULTS: Mice with loxP-flanked LepR alleles were mated with mice expressing Cre recombinase controlled by the inducible endothelial receptor tyrosine kinase promoter...
July 13, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28702330/neonatal-glp1r-activation-limits-adult-adiposity-by-durably-altering-hypothalamic-architecture
#5
Andrea V Rozo, Daniella A Babu, PoMan A Suen, David N Groff, Randy J Seeley, Rebecca A Simmons, Patrick Seale, Rexford S Ahima, Doris A Stoffers
OBJECTIVE: Adult obesity risk is influenced by alterations to fetal and neonatal environments. Modifying neonatal gut or neurohormone signaling pathways can have negative metabolic consequences in adulthood. Here we characterize the effect of neonatal activation of glucagon like peptide-1 (GLP-1) receptor (GLP1R) signaling on adult adiposity and metabolism. METHODS: Wild type C57BL/6 mice were injected with 1 nmol/kg Exendin-4 (Ex-4), a GLP1R agonist, for 6 consecutive days after birth...
July 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28701517/mesangial-cell-mammalian-target-of-rapamycin-complex-1-activation-results-in-mesangial-expansion
#6
Kojiro Nagai, Tatsuya Tominaga, Sayo Ueda, Eriko Shibata, Masanori Tamaki, Motokazu Matsuura, Seiji Kishi, Taichi Murakami, Tatsumi Moriya, Hideharu Abe, Toshio Doi
Human glomerular diseases can be caused by several different diseases, many of which include mesangial expansion and/or proliferation followed by glomerulosclerosis. However, molecular mechanisms underlying the pathologic mesangial changes remain poorly understood. Here, we investigated the role of the mammalian target of rapamycin complex 1 (mTORC1)-S6 kinase pathway in mesangial expansion and/or proliferation by ablating an upstream negative regulator, tuberous sclerosis complex 1 (TSC1), using tamoxifen-induced Foxd1-Cre mice [Foxd1ER(+) TSC1 mice]...
July 12, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28701310/deletion-of-%C3%AE-1-integrin-in-collecting-duct-principal-cells-leads-to-tubular-injury-and-renal-medullary-fibrosis
#7
Fahmy A Mamuya, Dongping Xie, Lei Lei, Ming Huang, Kenji Tsuji, Diane E Capen, Baoxue Yang, Ralph Weissleder, Teodor G Păunescu, Hua Jenny Lu
The renal collecting duct (CD) contains two major cell types, intercalated (ICs) and principal cells (PCs). A previous report showed that deletion of β-1 integrin in the entire renal CD causes defective CD morphogenesis resulting in kidney dysfunction. However, subsequent deletion of β-1 integrin specifically in ICs, and PCs respectively did not cause any morphological defects in the CDs. The discrepancy between these studies prompts us to reinvestigate the role of β-1 integrin in CD cells, specifically in the PCs...
July 12, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28696215/a-model-for-epigenetic-inhibition-via-transvection-in-the-mouse
#8
Juan D Rodriguez, Dexter A Myrick, Ilaria Falciatori, Michael A Christopher, Teresa W Lee, Gregory J Hannon, David J Katz
Transvection is broadly defined as the ability of one locus to affect its homologous locus in trans Although it was first discovered in the 1950s, there are only two known cases in mammals. Here, we report another instance of mammalian transvection induced by the Cre/LoxP system, which is widely used for conditional gene targeting in the mouse. We attempted to use the germline expressed Vasa-Cre transgene to engineer a mouse mutation, but observe a dramatic reduction of LoxP recombination in mice that inherit an already deleted LoxP allele in trans A similar phenomenon has previously been observed with another Cre that is expressed during meiosis, Sycp-1-Cre This second example of LoxP inhibition in trans reinforces the conclusion that certain meiotically expressed Cre alleles can initiate transvection in mammals...
July 10, 2017: Genetics
https://www.readbyqxmd.com/read/28694461/endothelial-hey2-deletion-reduces-endothelial-to-mesenchymal-transition-and-mitigates-radiation-proctitis-in-mice
#9
Elodie Mintet, Jérémy Lavigne, Vincent Paget, Georges Tarlet, Valérie Buard, Olivier Guipaud, Jean-Christophe Sabourin, Maria-Luisa Iruela-Arispe, Fabien Milliat, Agnès François
The current study evaluated the role of Hey2 transcription factor in radiation-induced endothelial-to-mesenchymal transition (EndoMT) and its impact on radiation-induced tissue damage in mice. Phenotypic modifications of irradiated, Hey2 siRNA- and Hey2 vector plasmid-transfected human umbilical vein endothelial cells (HUVECs) resembling EndoMT were monitored by qPCR, immunocytochemistry and western blots. Subsequently, in mice, a Cre-LoxP strategy for inactivation of Hey2 specifically in the endothelium was used to study the biological consequences...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28691752/mineral-trioxide-aggregate-improves-healing-response-of-periodontal-tissue-to-injury-in-mice
#10
I Vidovic Zdrilic, I O de Azevedo Queiroz, B G Matthews, J E Gomes-Filho, M Mina, I Kalajzic
BACKGROUND AND OBJECTIVE: Mineral trioxide aggregate (MTA) is a biomaterial used in endodontic procedures as it exerts beneficial effects on regenerative processes. In this study, we evaluate the effect of MTA on healing of periodontal ligament (PDL) and surrounding tissue, following injury, in a transgenic mouse model and on the differentiation of murine mesenchymal progenitor cells in vitro. MATERIAL AND METHODS: We used an inducible Cre-loxP in vivo fate mapping approach to examine the effects of MTA on the contributions of descendants of cells expressing the αSMA-CreERT2 transgene (SMA9(+) ) to the PDL and alveolar bone after experimental injury to the root furcation on the maxillary first molars...
July 10, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28690291/geminin-deletion-in-pre-meiotic-dna-replication-stage-causes-spermatogenesis-defect-and-infertility
#11
Yue Yuan, Xue-Shan Ma, Qiu-Xia Liang, Zhao-Yang Xu, Lin Huang, Tie-Gang Meng, Fei Lin, Heide Schatten, Zhen-Bo Wang, Qing-Yuan Sun
Geminin plays a critical role in cell cycle regulation by regulating DNA replication and serves as a transcriptional molecular switch that directs cell fate decisions. Spermatogonia lacking Geminin disappear during the initial wave of mitotic proliferation, while geminin is not required for meiotic progression of spermatocytes. It is unclear whether geminin plays a role in pre-meiotic DNA replication in later-stage spermatogonia and their subsequent differentiation. Here, we selectively disrupted Geminin in the male germline using the Stra8-Cre/loxP conditional knockout system...
July 9, 2017: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/28689051/projection-targets-of-medial-frontal-d1dr-expressing-neurons
#12
Sang-Woo Han, Young-Cho Kim, Nandakumar S Narayanan
Prefrontal neurons expressing D1-type dopamine receptors (D1DRs) have been implicated in a variety of cognitive processes including working memory and timing. Although D1DRs are most strongly expressed on layer V/VI projection neurons, it is unknown which brain areas are specifically targeted by these projections. Here we selectively marked D1DR neurons using cre-loxP techniques with AAV carrying mCherry fluorescent protein, and traced projection targets of D1DR+ neurons in the mouse medial frontal cortex (MFC)...
July 5, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28684271/ablating-erbb4-in-pv-neurons-attenuates-synaptic-and-cognitive-deficits-in-an-animal-model-of-alzheimer-s-disease
#13
Heng Zhang, Ling Zhang, Dongming Zhou, Xiao He, Dongpi Wang, Hongyu Pan, Xiaoqin Zhang, Yufei Mei, Qi Qian, Tingting Zheng, Frank E Jones, Binggui Sun
Accumulation of amyloid β (Aβ) induces neuronal, synaptic, and cognitive deficits in patients and animal models of Alzheimer's disease (AD). The underlying mechanisms, however, remain to be fully elucidated. In the present study, we found that Aβ interacted with ErbB4, a member of the receptor tyrosine kinase family and mainly expressed in GABAergic interneurons. Deleting ErbB4 in parvalbumin-expressing neurons (PV neurons) significantly attenuated oligomeric Aβ-induced suppression of long term potentiation (LTP)...
July 4, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28662917/accumulative-scfv-fc-antibody-gene-integration-into-the-hprt-chromosomal-locus-of-chinese-hamster-ovary-cells
#14
Xue Wang, Yoshinori Kawabe, Risa Kato, Takeshi Hada, Akira Ito, Yoshimasa Yamana, Masako Kondo, Masamichi Kamihira
We have previously developed an accumulative site-specific gene integration system (AGIS) using Cre-recombinase and mutated loxP sites. AGIS enables repeated transgene integration into a predetermined chromosomal site in mammalian cells. However, the process of establishing cells with multiple integrated copies of the transgene is still time-consuming. In the present study, we describe an improved version of AGIS that facilitates and accelerates the establishment of high-producer Chinese hamster ovary (CHO) cells...
June 26, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28658635/adipose-derived-stem-cell-sheets-functionalized-by-hybrid-baculovirus-for-prolonged-gdnf-expression-and-improved-nerve-regeneration
#15
Mu-Nung Hsu, Han-Tsung Liao, Kuei-Chang Li, Hwei-Hsien Chen, Tzu-Chen Yen, Pavel Makarevich, Yelena Parfyonova, Yu-Chen Hu
Peripheral nerve regeneration requires coordinated functions of supporting cells (e.g. Schwann cells) and neurotrophic factors such as glial cell line-derived neurotrophic factor (GDNF), but nerve regeneration is usually far from complete. Here we constructed a Cre/loxP-based hybrid baculovirus (BV) vector which enabled intracellular formation of episomal DNA minicircle for effective transduction of rat adipose-derived stem cells (ASCs) and prolonged expression of functional GDNF capable of recruiting Schwann cells...
May 3, 2017: Biomaterials
https://www.readbyqxmd.com/read/28643905/diverse-contribution-of-col2a1-expressing-cells-to-the-craniofacial-skeletal-cell-lineages
#16
N Sakagami, W Ono, N Ono
OBJECTIVES: Craniofacial skeletal development requires deliberate coordination of two distinct mechanisms of endochondral and intramembranous ossification. Col2a1-expressing cells encompass growth-associated skeletal progenitors in endochondral bones of the limb. The objective of this study was to determine the contribution of Col2a1-expressing cells to the craniofacial skeletal cell lineages. We hypothesize that Col2a1-expressing progenitors significantly contribute to various modes of ossification associated with the craniofacial development...
June 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28639573/a-transcriptomic-analysis-of-physiological-significance-of-hypoxia-inducible-factor-1%C3%AE-in-myogenesis-and-carbohydrate-metabolism-of-genioglossus-in-mice
#17
Tong Hao, Yue-Hua Liu, Yuan-Yuan Li, Yun Lu, Hong-Yi Xu
BACKGROUND: Chronic intermittent hypoxia is the most remarkable feature of obstructive sleep apnea/hypopnea syndrome and it can induce the change of hypoxia-inducible factor-1α (HIF-1α) expression and contractile properties in the genioglossus. To clarify the role of HIF-1α in contractile properties of the genioglossus, this study generated and compared high-throughput RNA-sequencing data from genioglossus between HIF-1α conditional knockout (KO) mice and littermate wild-type (WT) mice...
July 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28634346/generating-conditional-gene-knockouts-in-plasmodium-a-toolkit-to-produce-stable-dicre-recombinase-expressing-parasite-lines-using-crispr-cas9
#18
Ellen Knuepfer, Marta Napiorkowska, Christiaan van Ooij, Anthony A Holder
Successful establishment of CRISPR/Cas9 genome editing technology in Plasmodium spp. has provided a powerful tool to transform Plasmodium falciparum into a genetically more tractable organism. Conditional gene regulation approaches are required to study the function of gene products critical for growth and erythrocyte invasion of blood stage parasites. Here we employ CRISPR/Cas9 to facilitate use of the dimerisable Cre-recombinase (DiCre) that is frequently used to mediate the excision and loss of loxP-flanked DNA sequences in a rapamycin controlled manner...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28624213/crispr-cas9-loxp-mediated-gene-editing-as-a-novel-site-specific-genetic-manipulation-tool
#19
Fayu Yang, Changbao Liu, Ding Chen, Mengjun Tu, Haihua Xie, Huihui Sun, Xianglian Ge, Lianchao Tang, Jin Li, Jiayong Zheng, Zongming Song, Jia Qu, Feng Gu
Cre-loxP, as one of the site-specific genetic manipulation tools, offers a method to study the spatial and temporal regulation of gene expression/inactivation in order to decipher gene function. CRISPR/Cas9-mediated targeted genome engineering technologies are sparking a new revolution in biological research. Whether the traditional site-specific genetic manipulation tool and CRISPR/Cas9 could be combined to create a novel genetic tool for highly specific gene editing is not clear. Here, we successfully generated a CRISPR/Cas9-loxP system to perform gene editing in human cells, providing the proof of principle that these two technologies can be used together for the first time...
June 16, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28611493/construction-selection-and-immunogenicity-of-recombinant-fowlpox-candidate-vaccine-co-expressing-hiv-1-gag-and-gp145
#20
Yilong Zhu, Yan Guo, Shouwen Du, Cunxia Liu, Maopeng Wang, Dayong Ren, Fei Zhao, Yanfang Zhang, Wenchao Sun, Yiquan Li, Tingting Cao, Yingyue Jiang, Bin Xing, Bing Bai, Chang Li, Ningyi Jin
An HIV candidate vaccine for the Chinese population was designed by constructing a recombinant fowlpox virus expressing HIV-1 gag and HIV gp145 proteins via homologous recombination and plaque screening using enhanced green fluorescent protein (EGFP) as the reporter gene. EGFP in the recombinant was then knocked out with the Cre/Loxp system yielding rFPVHg-Hp, which was identified at the genomic, transcriptional and translational levels. The immunogenicity of rFPVHg-Hp was analyzed by measuring levels of HIV-specific antibodies and IFN-γ-secreting splenocytes by enzyme-linked immunosorbent assay and IFN enzyme-linked immune spot test in the BALB/c mouse model...
June 2017: Indian Journal of Microbiology
keyword
keyword
70363
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"