384 research outputs found
miR-9 Acts as an OncomiR in Prostate Cancer through Multiple Pathways That Drive Tumour Progression and Metastasis
Identification of dysregulated microRNAs (miRNAs) in prostate cancer is critical not only for diagnosis, but also differentiation between the aggressive and indolent forms of the disease. miR-9 was identified as an oncomiR through both miRNA panel RT-qPCR as well as high-throughput sequencing analysis of the human P69 prostate cell line as compared to its highly tumorigenic and metastatic subline M12, and found to be consistently upregulated in other prostate cell lines including DU-145 and PC3. While miR-9 has been characterized as dysregulated either as an oncomiR or tumour suppressor in a variety of other cancers including breast, ovarian, and nasopharyngeal carcinomas, it has not been previously evaluated and proven as an oncomiR in prostate cancer. miR-9 was confirmed an oncomiR when found to be overexpressed in tumour tissue as compared to adjacent benign glandular epithelium through laser-capture microdissection of radical prostatectomy biopsies. Inhibition of miR-9 resulted in reduced migratory and invasive potential of the M12 cell line, and reduced tumour growth and metastases in male athymic nude mice. Analysis showed that miR-9 targets e-cadherin and suppressor of cytokine signalling 5 (SOCS5), but not NF-ĸB mRNA. Expression of these proteins was shown to be affected by modulation in expression of miR-9
Dual Action of miR-125b As a Tumor Suppressor and OncomiR-22 Promotes Prostate Cancer Tumorigenesis
MicroRNAs (miRs) are a novel class of small RNA molecules, the dysregulation of which can contribute to cancer. A combinatorial approach was used to identify miRs that promote prostate cancer progression in a unique set of prostate cancer cell lines, which originate from the parental p69 cell line and extend to a highly tumorigenic/metastatic M12 subline. Together, these cell lines are thought to mimic prostate cancer progression in vivo. Previous network analysis and miR arrays suggested that the loss of hsa-miR-125b together with the overexpression of hsa-miR-22 could contribute to prostate tumorigenesis. The dysregulation of these two miRs was confirmed in human prostate tumor samples as compared to adjacent benign glandular epithelium collected through laser capture microdissection from radical prostatectomies. In fact, alterations in hsa-miR-125b expression appeared to be an early event in tumorigenesis. Reverse phase microarray proteomic analysis revealed ErbB2/3 and downstream members of the PI3K/AKT and MAPK/ERK pathways as well as PTEN to be protein targets differentially expressed in the M12 tumor cell compared to its parental p69 cell. Relevant luciferase+3’-UTR expression studies confirmed a direct interaction between hsa-miR-125b and ErbB2 and between hsa-miR-22 and PTEN. Restoration of hsa-miR-125b or inhibition of hsa-miR-22 expression via an antagomiR resulted in an alteration of M12 tumor cell behavior in vitro. Thus, the dual action of hsa-miR-125b as a tumor suppressor and hsa-miR-22 as an oncomiR contributed to prostate tumorigenesis by modulations in PI3K/AKT and MAPK/ERK signaling pathways, key pathways known to influence prostate cancer progression
The Pennsylvania Dutchman Vol. 8, No. 3
● The Dutch Touch in Iron ● The Pennsylvania Dutch Village ● Five June Days ● On an Amish Farm ● Traveling Pennsylvanians ● The Trail of the Stone Arched Bridges in Berks County ● Displaced Dutchmen Crave Shoo-flies ● Florence Starr Taylor ● Pennsylvania Dutch Pioneers ● Zinzendorf and Moravian Research ● Sheep in Dutchlandhttps://digitalcommons.ursinus.edu/dutchmanmag/1010/thumbnail.jp
The Dutchman Vol. 7, No. 4
● Pennsylvania Gaudyware ● Pennsylvania Dutch Canada ● Giant Cider Press ● Pennsylvania Dutch Needlework ● The Pennsylvania German in Fiction ● Conewago Chapel ● Love Feasts ● Pennsylvania Dutch Pioneers ● The Zehn-uhr Schtickhttps://digitalcommons.ursinus.edu/dutchmanmag/1007/thumbnail.jp
Streptomyces polyketides mediate bacteria–fungi interactions across soil environments
Although the interaction between prokaryotic and eukaryotic microorganisms is crucial for the functioning of ecosystems, information about the processes driving microbial interactions within communities remains scarce. Here we show that arginine-derived polyketides (arginoketides) produced by Streptomyces species mediate cross-kingdom microbial interactions with fungi of the genera Aspergillus and Penicillium, and trigger the production of natural products. Arginoketides can be cyclic or linear, and a prominent example is azalomycin F produced by Streptomyces iranensis, which induces the cryptic orsellinic acid gene cluster in Aspergillus nidulans. Bacteria that synthesize arginoketides and fungi that decode and respond to this signal were co-isolated from the same soil sample. Genome analyses and a literature search indicate that arginoketide producers are found worldwide. Because, in addition to their direct impact, arginoketides induce a secondary wave of fungal natural products, they probably contribute to the wider structure and functioning of entire soil microbial communities
Volcanic SO2 by UV-TIR satellite retrievals: validation by using ground-based network at Mt. Etna
Mt. Etna volcano in Italy is one of the most active degassing volcanoes worldwide, emitting a mean of 1.7 Mt/year of Sulphur Dioxide (SO2) in quiescent periods. In this work, SO2 measurements retrieved by Moderate Resolution Imaging Spectroradiometer (MODIS), hyper-spectral Infrared Atmospheric Sounding Interferometer (IASI) and the second Global Ozone Monitoring Experiment (GOME-2) data are compared with the ground-based data from the FLux Automatic MEasurement monitoring network (FLAME). Among the eighteen lava fountain episodes occurring at Mt. Etna in 2011, the 10 April
paroxysmal event has been selected as a case-study for the simultaneous observation of the SO2 cloud by satellite and ground-based sensors. For each data-set two retrieval techniques were adopted and the
measurements of SO2 mass and flux with their respective uncertainty were obtained. With respect to the FLAME SO2 mass of 4.5 Gg, MODIS, IASI and GOME-2 differ by about 10%, 15% and 30%, respectively. The SO2 flux correlation coefficient between MODIS and FLAME is 0.84. All the retrievals within the respective errors are in agreement with the ground-based measurements supporting the validity of these space measurements
A Peer-reviewed Newspaper About_ Machine Feeling
On the ability of technologies to capture and structure feelings and experiences that are active, in flux, and situated in the present.
Publication resulting from research workshop at CRASSH, University of Cambridge, organised in collaboration with CRASSH, University of Cambridge and transmediale festival for art and digital culture, Berlin
The Pennsylvania Dutchman Vol. 8, No. 1
● The Summer House ● Drinks in Dutchland ● Yesteryear in Dutchland ● Moshey and Bellyguts ● Rise of Interest in Dutch Antiques ● Diaper Lore ● Lititz ● Witchcraft in Cow and Horse ● Dorothy Kalbach ● Plain Dutch and Gay Dutch ● Dialect Folksay ● Pennsylvania Dutch Pioneers ● About the Authors ● What\u27s New in Dutchlandhttps://digitalcommons.ursinus.edu/dutchmanmag/1008/thumbnail.jp
Merged SAGE II, Ozone_cci and OMPS ozone profile dataset and evaluation of ozone trends in the stratosphere
In this paper, we present a merged dataset of ozone profiles from
several satellite instruments: SAGE II on ERBS, GOMOS, SCIAMACHY and
MIPAS on Envisat, OSIRIS on Odin, ACE-FTS on SCISAT, and OMPS on
Suomi-NPP. The merged dataset is created in the framework of the
European Space Agency Climate Change Initiative (Ozone_cci) with
the aim of analyzing stratospheric ozone trends. For the merged
dataset, we used the latest versions of the original ozone
datasets. The datasets from the individual instruments have been
extensively validated and intercompared; only those datasets which
are in good agreement, and do not exhibit significant drifts with
respect to collocated ground-based observations and with respect to
each other, are used for merging. The long-term SAGE–CCI–OMPS
dataset is created by computation and merging of deseasonalized
anomalies from individual instruments.
The merged SAGE–CCI–OMPS dataset consists of deseasonalized
anomalies of ozone in 10° latitude bands from 90° S
to 90° N and from 10 to 50 km in steps of
1 km covering the period from October 1984 to
July 2016. This newly created dataset is used for evaluating ozone
trends in the stratosphere through multiple linear
regression. Negative ozone trends in the upper stratosphere are
observed before 1997 and positive trends are found after 1997. The
upper stratospheric trends are statistically significant at
midlatitudes and indicate ozone recovery, as expected from the
decrease of stratospheric halogens that started in the middle of the
1990s and stratospheric cooling
- …