keyword
MENU ▼
Read by QxMD icon Read
search

signal peptidase

keyword
https://www.readbyqxmd.com/read/28094469/immunohistochemical-assessment-of-glucagon-like-peptide-1-receptor-glp-1r-expression-in-the-pancreas-of-patients-with-type-2-diabetes
#1
Rikke Kaae Kirk, Charles Pyke, Matthias G von Herrath, Jane Preuss Hasselby, Lars Pedersen, Pia Gottrup Mortensen, Lotte Bjerre Knudsen, Ken Coppieters
Glucagon-like peptide-1 (GLP-1) is an incretin hormone which stimulates insulin release and inhibits glucagon secretion from the pancreas in a glucose-dependent manner. Incretin-based therapies, consisting of GLP-1 receptor (GLP-1R) agonists and dipeptidyl peptidase-4 (DPP-4) inhibitors, are used for the treatment of T2D. Immunohistochemical studies for GLP-1R expression have previously been hampered by the use of unspecific polyclonal antibodies. This study used a new monoclonal antibody to assess GLP-1R expression in pancreatic tissue from 23 patients with T2D, including 7 with a DPP-4 inhibitor and 1 with a GLP-1R agonist treatment history...
January 17, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28088521/signal-peptidase-i-processed-secretory-signal-sequences-selection-for-and-against-specific-amino-acids-at-the-second-position-of-mature-protein
#2
Yaramah M Zalucki, Michael P Jennings
Signal peptides direct proteins from the cytoplasm to the periplasm. These N-terminal peptides are cleaved upon entry to the periplasm by either signal peptidase I, or signal peptidase II for lipoproteins. Signal peptidase I is a serine protease that has either a serine-lysine or serine-histidine catalytic dyad present in the active site. The recognition site for signal peptide cleavage by signal peptidase I has been defined primarily by an Ala-X-Ala motif at the C-terminal end of the signal peptide, one amino acid away from the cleavage site...
January 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28065853/sitagliptin-inhibit-human-lymphocytes-proliferation-and-th1-th17-differentiation-in-vitro
#3
Marcelo Maia Pinheiro, Caroline Lais Stoppa, Claudete Justina Valduga, Cristina Eunice Okuyama, Renata Gorjão, Regina Mara Silva Pereira, Susana Nogueira Diniz
Dipeptidyl peptidase-4 (DPP-4) inhibitors are a new class of anti-diabetic agents that are widely used in clinical practice to improve glycemic control in patients with type 2 diabetes. DPP-4 is also known as lymphocyte cell surface protein, CD26, and plays an important role in T-cell immunity. Recent studies suggest that DPP-4 inhibitors improve beta-cell function and attenuate autoimmunity in type 1 diabetic mouse models. To investigate the direct effect of DPP4 in immune response, human peripheral blood mononuclear cells (PBMC) from healthy volunteers were obtained by Ficoll gradient and cultivated in the absence (control) or presence of phytohemagglutinin (PHA), or stimulated with PHA and treated with sitagliptin...
January 5, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28065271/signal-peptidase-enzymology-and-substrate-specificity-profiling
#4
R E Dalbey, D Pei, Ö D Ekici
Signal peptidases are membrane proteases that play crucial roles in the protein transport pathway of bacteria. They cleave off the signal peptide from precursor proteins that are membrane inserted by the SecYEG or Tat translocons. Signal peptide cleavage releases the translocated protein from the inner membrane allowing the protein to be exported to the periplasm, outer membrane, or secreted into the medium. Signal peptidases are very important proteins to study. They are unique serine proteases with a Ser-Lys dyad, catalyze cleavage at the membrane surface, and are promising potential antibacterial drug targets...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28065261/expression-purification-and-enzymatic-characterization-of-intramembrane-proteases
#5
R Zhou, Y Shi, G Yang
Intramembrane proteases catalyze peptide bond hydrolysis in the lipid bilayer and play a key role in numerous cellular processes. These integral membrane enzymes consist of four classes: site-2 protease (S2P), rhomboid serine protease, Rce1-type glutamyl protease, and aspartyl protease exemplified by presenilin and signal peptide peptidase (SPP). Structural elucidation of these enzymes is important for mechanistic understanding of their functions, particularly their roles in cell signaling and debilitating diseases such as Parkinson's disease and Alzheimer's disease...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28060822/transcriptome-sequencing-reveals-large-scale-changes-in-axenic-aedes-aegypti-larvae
#6
Kevin J Vogel, Luca Valzania, Kerri L Coon, Mark R Brown, Michael R Strand
Mosquitoes host communities of microbes in their digestive tract that consist primarily of bacteria. We previously reported that Aedes aegypti larvae colonized by a native community of bacteria and gnotobiotic larvae colonized by only Escherichia coli develop very similarly into adults, whereas axenic larvae never molt and die as first instars. In this study, we extended these findings by first comparing the growth and abundance of bacteria in conventional, gnotobiotic, and axenic larvae during the first instar...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28060721/dppiv-promotes-endometrial-carcinoma-cell-proliferation-invasion-and-tumorigenesis
#7
Xiaoqing Yang, Xinhua Zhang, Rongrong Wu, Qicheng Huang, Yao Jiang, Jianbing Qin, Feng Yao, Guohua Jin, Yuquan Zhang
Dipeptidyl peptidase IV (DPPIV), also known as CD26, is a 110-kDa cell surface glycoprotein expressed in various tissues. DPPIV reportedly plays a direct role in the progression of several human malignancies. DPPIV specific inhibitors are employed as antidiabetics and could potentially be repurposed to enhance anti-tumor immunotherapies. In the present study, we investigated the correlation between DPPIV expression and tumor progression in endometrial carcinoma (EC). DPPIV overexpression altered cell morphology and stimulated cell proliferation, invasion and tumorigenesis in vitro and in vivo...
January 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28038943/design-synthesis-and-in-vitro-biological-evaluation-of-oligopeptides-targeting-e-coli-type-i-signal-peptidase-lepb
#8
Maria De Rosa, Lu Lu, Edouard Zamaratski, Natalia Szałaj, Sha Cao, Henrik Wadensten, Lena Lenhammar, Johan Gising, Annette K Roos, Douglas L Huseby, Rolf Larsson, Per E Andrén, Diarmaid Hughes, Peter Brandt, Sherry L Mowbray, Anders Karlén
Type I signal peptidases are potential targets for the development of new antibacterial agents. Here we report finding potent inhibitors of E. coli type I signal peptidase (LepB), by optimizing a previously reported hit compound, decanoyl-PTANA-CHO, through modifications at the N- and C-termini. Good improvements of inhibitory potency were obtained, with IC50s in the low nanomolar range. The best inhibitors also showed good antimicrobial activity, with MICs in the low μg/mL range for several bacterial species...
December 7, 2016: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28011482/galectin-3-is-implicated-in-tumor-progression-and-resistance-to-anti-androgen-drug-through-regulation-of-androgen-receptor-signaling-in-prostate-cancer
#9
Tsogt-Ochir Dondoo, Tomoharu Fukumori, Kei Daizumoto, Tomoya Fukawa, Miho Kohzuki, Minoru Kowada, Yoshito Kusuhara, Hidehisa Mori, Hiroyoshi Nakatsuji, Masayuki Takahashi, Hiro-Omi Kanayama
BACKGROUND: Castration-resistant prostate cancer (CRPC)-related deaths are increasing worldwide. Therefore, clarification of the mechanisms of hormone-related tumor progression and resistance to anti-androgen drugs is useful in order to develop strategies for appropriate treatment of CRPC. Galectin-3 has been shown to be correlated with tumor progression in a variety of cancer types through the regulation of tumor proliferation, angiogenesis, and apoptosis. MATERIALS AND METHODS: We examined tumor cell invasion and migration using the xCELLigence system...
January 2017: Anticancer Research
https://www.readbyqxmd.com/read/27989861/identification-and-activity-of-a-paralog-of-cathepsin-s-from-yellow-catfish-pelteobagrus-fulvidraco-involved-in-immune-response
#10
Yun Wang, Xin Liu, Shuai Lv, Jinnan Ren, Fei Ke
Cathepsin S, a papain-like cysteine peptidase, is an important regulator and signaling molecule with diverse biological actions in addition to immune presentation. However, our understanding of its structure and properties remains limited. Herein, a full-length cathepsin Sa from yellow catfish was cloned and named PfCTSSa. It contained 1366 bp, including a 981 bp ORF flanked by a 123 bp 5'-untranslated region (UTR) and a 262 bp 3'-UTR. This ORF encoded a 36.5 kD cysteine protease with the deduced amino acid sequence having a 76% sequence identity with Ictalurus punctatus ctssa...
December 15, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27983922/overexpression-of-protease-serine-8-inhibits-glioma-cell-proliferation-migration-and-invasion-via-suppressing-the-akt-mtor-signaling-pathway
#11
Hu-Yin Yang, Da-Zhao Fang, Xiao-Bo Hui, Dai Liu
Protease serine 8 (PRSS8), a serine peptidase, has a widespread expression in normal epidermal cells. Recently, many researchers demonstrated down-regulation of PRSS8 in cancer tissues as well as its tumor-suppression role in cancer development. However, the biological functions of PRSS8 in glioma remain unclear. In the current study, we demonstrated decreased expression of PRSS8 in glioma tissues and cell lines. PRSS8 up-regulation inhibited glioma cell proliferation, migration and invasion. In addition, the xenograft experiments showed that PRSS8 overexpression suppressed glioma cell growth in vivo...
November 24, 2016: Oncology Research
https://www.readbyqxmd.com/read/27959403/bcl11b-regulates-enamel-matrix-protein-expression-and-dental-epithelial-cell-differentiation-during-rat-tooth-development
#12
Ziyue Li, Guoqing Chen, Yaling Yang, Weihua Guo, Weidong Tian
Amelogenesis, beginning with thickened epithelial aggregation and ending with highly mineralized enamel formation, is a process mediated by a complex signaling network that involves several molecules, including growth and transcription factors. During early tooth development, the transcription factor B‑cell CLL/lymphoma 11B (Bcl11b) participates in dental epithelial cell proliferation and differentiation. However, whether it affects the postnatal regulation of enamel matrix protein expression and ameloblast differentiation remains unclear...
January 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27938351/modular-assembly-of-synthetic-proteins-that-span-the-plasma-membrane-in-mammalian-cells
#13
Anam Qudrat, Kevin Truong
BACKGROUND: To achieve synthetic control over how a cell responds to other cells or the extracellular environment, it is important to reliably engineer proteins that can traffic and span the plasma membrane. Using a modular approach to assemble proteins, we identified the minimum necessary components required to engineer such membrane-spanning proteins with predictable orientation in mammalian cells. RESULTS: While a transmembrane domain (TM) fused to the N-terminus of a protein is sufficient to traffic it to the endoplasmic reticulum (ER), an additional signal peptidase cleavage site downstream of this TM enhanced sorting out of the ER...
December 9, 2016: BMC Biotechnology
https://www.readbyqxmd.com/read/27936133/polyglycine-acts-as-a-rejection-signal-for-protein-transport-at-the-chloroplast-envelope
#14
Joshua K Endow, Agostinho Gomes Rocha, Amy J Baldwin, Rebecca L Roston, Toshio Yamaguchi, Hironari Kamikubo, Kentaro Inoue
PolyGly is present in many proteins in various organisms. One example is found in a transmembrane β-barrel protein, translocon at the outer-envelope-membrane of chloroplasts 75 (Toc75). Toc75 requires its N-terminal extension (t75) for proper localization. t75 comprises signals for chloroplast import (n75) and envelope sorting (c75) in tandem. n75 and c75 are removed by stromal processing peptidase and plastidic type I signal peptidase 1, respectively. PolyGly is present within c75 and its deletion or substitution causes mistargeting of Toc75 to the stroma...
2016: PloS One
https://www.readbyqxmd.com/read/27933087/revisiting-vitis-vinifera-subtilase-gene-family-a-possible-role-in-grapevine-resistance-against-plasmopara-viticola
#15
Joana Figueiredo, Gonçalo J Costa, Marisa Maia, Octávio S Paulo, Rui Malhó, Marta Sousa Silva, Andreia Figueiredo
Subtilisin-like proteases, also known as subtilases, are a very diverse family of serine peptidases present in many organisms. In grapevine, there are hints of the involvement of subtilases in defense mechanisms, but their role is not yet understood. The first characterization of the subtilase gene family was performed in 2014. However, simultaneously, the grapevine genome was re-annotated and several sequences were re-annotated or retrieved. We have performed a re-characterization of this family in grapevine and identified 82 genes coding for 97 putative proteins, as result of alternative splicing...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27932244/transcriptional-response-to-mitochondrial-protease-immp2l-knockdown-in-human-primary-astrocytes
#16
Akira Gokoolparsadh, Zhiming Fang, Nady Braidy, Peijie Lin, Christopher J Pardy, Valsamma Eapen, Raymond Clarke, Irina Voineagu
IMMP2L encodes the inner membrane peptidase subunit 2, a mitochondrial protease involved in cleaving the space-sorting signals of mitochondrial membrane proteins. IMMP2L has been implicated in Tourette syndrome, but how its dysfunction contributes to the neurodevelopmental phenotype remains unclear. Here we show that IMMP2L transcription requires Topoisomerase I in human primary astrocytes, and characterize the downstream effects of IMMP2L knockdown on gene expression. We demonstrate that IMMP2L knockdown leads to dysregulation of genes involved in central nervous system development...
January 22, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27922176/dipeptidyl-peptidase-4-inhibitor-sitagliptin-reduces-inflammation-fibrosis-and-preserves-diastolic-function-in-a-rat-model-of-heart-failure-with-preserved-ejection-fraction
#17
Grazia Esposito, Donato Cappetta, Rosa Russo, Alessia Rivellino, Loreta Pia Ciuffreda, Fiorentina Roviezzo, Elena Piegari, L Liberato Berrino, Francesco Rossi, Antonella De Angelis, Konrad Urbanek
BACKGROUND AND PURPOSE: Heart failure with preserved ejection fraction (HFpEF) is a systemic syndrome driven by co-morbidities and its pathophysiology is poorly understood. Several studies suggesting that dipeptidyl peptidase 4 (DPP4) might be involved in the pathophysiology of heart failure prompted experimental and clinical investigations of DPP4 inhibitors on cardiovascular system. The aim of our study was to determine whether DPP4 inhibitor sitagliptin (SITA) affects the progression of HFpEF independently from the effects on glycaemia...
December 6, 2016: British Journal of Pharmacology
https://www.readbyqxmd.com/read/27908864/identification-of-candidate-genes-in-osteoporosis-by-integrated-microarray-analysis
#18
J J Li, B Q Wang, Q Fei, Y Yang, D Li
OBJECTIVES: In order to screen the altered gene expression profile in peripheral blood mononuclear cells of patients with osteoporosis, we performed an integrated analysis of the online microarray studies of osteoporosis. METHODS: We searched the Gene Expression Omnibus (GEO) database for microarray studies of peripheral blood mononuclear cells in patients with osteoporosis. Subsequently, we integrated gene expression data sets from multiple microarray studies to obtain differentially expressed genes (DEGs) between patients with osteoporosis and normal controls...
December 2016: Bone & Joint Research
https://www.readbyqxmd.com/read/27899793/bacterial-proteases-untapped-antimicrobial-drug-targets
#19
REVIEW
Elizabeth Culp, Gerard D Wright
Bacterial proteases are an extensive collection of enzymes that have vital roles in cell viability, stress response and pathogenicity. Although their perturbation clearly offers the potential for antimicrobial drug development, both as traditional antibiotics and anti-virulence drugs, they are not yet the target of any clinically used therapeutics. Here we describe the potential for and recent progress in the development of compounds targeting bacterial proteases with a focus on AAA+ family proteolytic complexes and signal peptidases (SPs)...
November 30, 2016: Journal of Antibiotics
https://www.readbyqxmd.com/read/27887857/a-potential-contribution-of-dipeptidyl-peptidase-4-by-the-mediation-of-monocyte-differentiation-in-the-development-and-progression-of-abdominal-aortic-aneurysms
#20
Hsin-Ying Lu, Chun-Yao Huang, Chun-Ming Shih, Yi-Wen Lin, Chein-Sung Tsai, Feng-Yen Lin, Chun-Che Shih
OBJECTIVE: Abdominal aortic aneurysms (AAAs) are characterized by the destruction of elastin and collagen in the media and adventitia. Dipeptidyl peptidase-4 (DPP-4, an adipokine known as CD26) influences cell signaling, cell-matrix interactions, and the regulation of the functional activity of incretins in metabolic and inflammatory disorders. Although the role of DPP-4 in AAA evolution has been demonstrated, the underlying mechanisms of DPP-4-regulated AAA development remains unknown...
November 22, 2016: Journal of Vascular Surgery
keyword
keyword
115016
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"