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We performed gene expression profiles of human bronchoalveolar epithelial cells (HBEC) transduced with GFP labeled murine focal adhesion kinase (PMX-Purom-GFP-mFAK) or GFP control empty vector counterpart (PMX-Purom-GFP-empty)

ABSTRACT: The goal if this project was to determine the cellular pathways affected by FAK protein overexpression downstream of oncogenic KRAS and RHOA in normal lung epithelium. In addition, we aim to characterize the potential downstream modulators of cell growth and migration upon FAK hyperactivation. We identified pathways in DNA damage, cell growth, apoptosis and cytoskeleton remodeling pertaining to tissue differentiation and carcinogenesis signature respectively.

ORGANISM(S): Homo sapiens

PROVIDER: GSE72470 | GEO | 2016/01/01

SECONDARY ACCESSION(S): PRJNA294109

REPOSITORIES: GEO

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We performed gene expression profiles of human bronchoalveolar epithelial cells (HBEC) transduced with GFP labeled murine focal adhesion kinase (PMX-Purom-GFP-mFAK) or GFP control empty vector counterpart (PMX-Purom-GFP-empty)

Project description:The goal if this project was to determine the cellular pathways affected by FAK protein overexpression downstream of oncogenic KRAS and RHOA in normal lung epithelium. In addition, we aim to characterize the potential downstream modulators of cell growth and migration upon FAK hyperactivation. We identified pathways in DNA damage, cell growth, apoptosis and cytoskeleton remodeling pertaining to tissue differentiation and carcinogenesis signature respectively. For this study, two duplicate samples were analyzed in triplicate arrays for a total of 6 data poinst per condition. The groups compared were PMX-Purom-GFP-mFAK against PMX-Purom-GFP-emty.

2016-07-03 | E-GEOD-72470 | biostudies-arrayexpress

Gene expression profiles of human bronchoalveolar epithelial cells (HBEC) transduced with GFP labeled murine focal adhesion kinase (PMX-Purom-GFP-mFAK) or in combination with SUMO ligase Pias1

2016-02-02 | GSE73280 | GEO

Live imaging of GFP-labeled proteins in Drosophila oocytes.

Project description:The Drosophila oocyte has been established as a versatile system for investigating fundamental questions such as cytoskeletal function, cell organization, and organelle structure and function. The availability of various GFP-tagged proteins means that many cellular processes can be monitored in living cells over the course of minutes or hours, and using this technique, processes such as RNP transport, epithelial morphogenesis, and tissue remodeling have been described in great detail in Drosophila oocytes. The ability to perform video imaging combined with a rich repertoire of mutants allows an enormous variety of genes and processes to be examined in incredible detail. One such example is the process of ooplasmic streaming, which initiates at mid-oogenesis. This vigorous movement of cytoplasmic vesicles is microtubule and kinesin-dependent and provides a useful system for investigating cytoskeleton function at these stages. Here I present a protocol for time lapse imaging of living oocytes using virtually any confocal microscopy setup.

| S-EPMC3641710 | biostudies-other

FAK activity sustains intrinsic and acquired ovarian cancer resistance to platinum chemotherapy [KMF parental, KMF clone KT13 (FAK-/-), KT13 + GFP-FAK, KT13 + GFP-FAK R454, and KT13 + deltaGSK beta-catenin]

Project description:Gene copy number changes, cancer stem cell (CSC) increases, and platinum chemotherapy resistance contribute to poor prognosis in patients with recurrent high grade serous ovarian cancer (HGSOC). CSC phenotypes involving Wnt-b-catenin and aldehyde dehydrogenase activities, platinum resistance, and tumor initiating frequency are here associated with spontaneous genetic gains, including genes encoding KRAS, MYC and FAK, in a new murine model of ovarian cancer (KMF). Noncanonical FAK signaling was sufficient to sustain human and KMF tumorsphere proliferation, CSC survival, and platinum resistance. Increased FAK tyrosine phosphorylation occurred in HGSOC patient tumors surviving neo-adjuvant platinum and paclitaxel chemotherapy and platinum resistant tumorspheres acquired FAK dependence for growth. Importantly, combining a pharmacologic FAK inhibitor with platinum overcame chemoresistance and triggered apoptosis in vitro and in vivo. Knockout, rescue, genomic and transcriptomic analyses collectively identified more than 400 genes regulated along a FAK/b-catenin/Myc axis impacting stemness and DNA repair in HGSOC, with 66 genes gained in a majority of Cancer Genome Atlas samples. Together, these results support combinatorial testing of FAK inhibitors for the treatment of recurrent ovarian cancer.

2019-07-01 | GSE129098 | GEO

The structures of a naturally empty cowpea mosaic virus particle and its genome-containing counterpart by cryo-electron microscopy.

Project description:Cowpea mosaic virus (CPMV) is a picorna-like plant virus. As well as an intrinsic interest in CPMV as a plant pathogen, CPMV is of major interest in biotechnology applications such as nanotechnology. Here, we report high resolution cryo electron microscopy (cryo-EM) maps of wild type CPMV containing RNA-2, and of naturally-formed empty CPMV capsids. The resolution of these structures is sufficient to visualise large amino acids. We have refined an atomic model for each map and identified an essential amino acid involved in genome encapsidation. This work has furthered our knowledge of Picornavirales genome encapsidation and will assist further work in the development of CPMV as a biotechnological tool.

| S-EPMC5428714 | biostudies-literature

In vivo analysis of interactions between GFP-labeled microfilaments and plastid stromules.

Project description:BackgroundPlastid stromules are stroma-filled tubules that extend from the surface of plastids in higher plants and allow the exchange of protein molecules between plastids. These structures are highly dynamic; stromules change both their shape and position in the cytoplasm very rapidly. Previous studies with microfilament inhibitors indicated that stromule shape and movement are dependent on the actin cytoskeleton. To learn more about the nature of the interactions of stromules and the cytoskeleton, we imaged fluorescently-labeled microfilaments and plastids.ResultsWe have used Arabidopsis thaliana plants expressing green fluorescent protein fused to the human actin-binding protein talin to observe microfilaments and their relationship to stromules in vivo. Microfilaments were observed in close contact with stromules and plastid bodies of hypocotyl epidermis. Time-lapse confocal microscopy revealed that microfilament rearrangements were associated with changes in plastid and stromule morphology and position. We also observed close interactions between mitochondria and stromules in double-labeled cells.ConclusionOur results indicate a correlation between the rearrangement of microfilaments and changes in the shape and position of plastids and stromules. Stromules interact with microfilaments that may also be utilized by mitochondria and other organelles. The interaction of microfilaments and plastids is likely to be mediated by actin-binding proteins on the plastid envelope membrane.

| S-EPMC356911 | biostudies-literature

Development and characterization of selective FAK inhibitors and PROTACs with in vivo activity

Project description:Focal adhesion kinase (FAK) is an attractive drug target due to its overexpression in cancer. FAK functions as a non-receptor tyrosine kinase and scaffolding protein, coordinating several downstream signaling effectors and cellular processes. While drug discovery efforts have largely focused on targeting FAK kinase activity, FAK inhibitors have failed to show efficacy as single agents in clinical trials. Here, using structure-guided design, we report the development of a selective FAK inhibitor (BSJ-04-175) and degrader (BSJ-04-146) to evaluate the consequences and advantages of abolishing all FAK activity in cancer models. BSJ-04-146 achieves rapid and potent FAK degradation with high proteome-wide specificity in cancer cells and induces remarkably durable degradation in tumor-bearing mice. Compared to kinase inhibition, targeted degradation of FAK exhibits pronounced improved activity on downstream signaling and cancer cell viability and migration. Together, BSJ-04-175 and BSJ-04-146 are valuable chemical tools to dissect the specific consequences of targeting FAK through small molecule inhibition or degradation.

2023-04-26 | PXD039254 | Pride

Development and characterization of selective FAK inhibitors and PROTACs with in vivo activity

2023-04-26 | PXD039215 | Pride

Transcription profiling of mouse cranial neural crest cells of E11.5 wild type and FAK mutants (valle-affy-mouse-480721)

Project description:Cranial neural crest cells (NCC) give rise to the majority of the cartilage, bone, connective tissue, and sensory ganglia in the head, and also participate in the remodeling of the cardiac outflow tract and pharyngeal arch arteries during cardiovascular development. Our preliminary results show that targeted deletion of focal adhesion kinase (FAK) in murine NCC results in cardiovascular and craniofacial alterations, resembling human congenital heart diseases The objective of this project is to elucidate the underlying mechanisms by which FAK mediates NCC function during development. Compare gene expression in cranial neural crest cells of E11.5 wild type and FAK mutants. FAK is a tyrosine kinase that transduces integrin and growth factor signaling pathways. Abnormal growth factor signaling leads to cardiovascular malformations caused by deficient cardiac NCC function. However, a direct role for FAK in NCC morphogenesis has not been demonstrated. We will test the hypothesis that FAK is a downstream target of essential growth factor signaling in cranial neural crest cells during development. 1) Generate E11.5 mouse embryos that are either control (FAK+/flox) or NCC specific FAK knockout (Wnt1Cre;FAKflox/flox). 2) Determine genotype by PCR. 3) Dissect head and torax from the different genotypes. 4) Obtain NCC from dissected tissue by magnetic cell sorting using p75 antibody. 5) Prepare total RNA from speciments. We will pool the NCC from 3 different embryos of the same genotype, and send total RNA to TGEN for probe preparation, hybridization and array result analysis.

2008-06-11 | E-GEOD-11149 | biostudies-arrayexpress

Preclinical Evaluation of the Copper-64 Labeled GRPR-Antagonist RM26 in Comparison with the Cobalt-55 Labeled Counterpart for PET-Imaging of Prostate Cancer.

Project description:Gastrin-releasing peptide receptor (GRPR) is overexpressed in the majority of prostate cancers. This study aimed to investigate the potential of 64Cu (radionuclide for late time-point PET-imaging) for imaging of GRPR expression using NOTA-PEG2-RM26 and NODAGA-PEG2-RM26. Methods: NOTA/NODAGA-PEG2-RM26 were labeled with 64Cu and evaluated in GRPR-expressing PC-3 cells. Biodistribution of [64Cu]Cu-NOTA/NODAGA-PEG2-RM26 was studied in PC-3 xenografted mice and compared to the biodistribution of [57Co]Co-NOTA/NODAGA-PEG2-RM26 at 3 and 24 h p.i. Preclinical PET/CT imaging was performed in tumor-bearing mice. NOTA/NODAGA-PEG2-RM26 were stably labeled with 64Cu with quantitative yields. In vitro, binding of [64Cu]Cu-NOTA/NODAGA-PEG2-RM26 was rapid and GRPR-specific with slow internalization. In vivo, [64Cu]Cu-NOTA/NODAGA-PEG2-RM26 bound specifically to GRPR-expressing tumors with fast clearance from blood and normal organs and displayed generally comparable biodistribution profiles to [57Co]Co-NOTA/NODAGA-PEG2-RM26; tumor uptake exceeded normal tissue uptake 3 h p.i.. Tumor-to-organ ratios did not increase significantly with time. [64Cu]Cu-NOTA-PEG2-RM26 had a significantly higher liver and pancreas uptake compared to other agents. 57Co-labeled radioconjugates showed overall higher tumor-to-non-tumor ratios, compared to the 64Cu-labeled counterparts. [64Cu]Cu-NOTA/NODAGA-PEG2-RM26 was able to visualize GRPR-expression in a murine PC model using PET. However, [55/57Co]Co-NOTA/NODAGA-PEG2-RM26 provided better in vivo stability and overall higher tumor-to-non-tumor ratios compared with the 64Cu-labeled conjugates.

| S-EPMC7766840 | biostudies-literature

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