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https://www.readbyqxmd.com/read/28747502/permissivity-of-dpp4-orthologs-to-mers-coronavirus-is-governed-by-glycosylation-and-other-complex-determinants
#1
Kayla M Peck, Trevor Scobey, Jesica Swanstrom, Kara L Jensen, Christina L Burch, Ralph S Baric, Mark T Heise
Middle East respiratory syndrome coronavirus (MERS-CoV) utilizes dipeptidyl peptidase 4 (DPP4) as an entry receptor. While bat, camel, and human DPP4 support MERS-CoV infection, several DPP4 orthologs, including mouse, ferret, hamster, and guinea pig, do not. Previous work revealed that glycosylation of mouse DPP4 plays a role in blocking MERS-CoV infection. Here, we test whether glycosylation also acts as a determinant of permissivity for ferret, hamster, and guinea pig DPP4. We find that while glycosylation plays an important role in these orthologs, additional sequence and structural determinants impact their ability to act as functional receptors for MERS-CoV...
July 26, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28747063/dpp4-inhibitors-can-be-a-drug-of-choice-for-type-3-diabetes-a-mini-review
#2
Nehru Sai Suresh Chalichem, Chaitanya Gonugunta, Praveen Thaggikuppe Krishnamurthy, Basavan Duraiswamy
As well known to the scientific community, Alzheimer's disease (AD) is an irreversible neurodegenerative disease that ends up with impairment of memory and cognition due to neuronal and synapse loss. Patient's quality of life can be enhanced by targeting neurogenesis as a therapeutic paradigm. Moreover, several research evidences support the concept that AD is a type of metabolic disorder mediated by impairment in brain insulin responsiveness and energy metabolism. Growing evidence suggests that endogenous peptides such as glucagon-like peptide-1 (GLP-1) and stromal-derived factor-1α (SDF-1α) provide neuroprotection across a range of experimental models of AD...
January 1, 2017: American Journal of Alzheimer's Disease and Other Dementias
https://www.readbyqxmd.com/read/28736981/ketoacidosis-and-sglt2-inhibitor-treatment-analysis-of-faers-data
#3
Jenny E Blau, Sri Harsha Tella, Simeon I Taylor, Kristina I Rother
BACKGROUND: Regulatory agencies have concluded that sodium glucose cotransporter 2 (SGLT2) inhibitors lead to ketoacidosis, but published literature on this point remains controversial. METHODS: We searched the FDA Adverse Event Reporting System (FAERS) for reports of acidosis in patients treated with canagliflozin, dapagliflozin, or empagliflozin (from the date of each drug's FDA approval until May 15, 2015). We compared the number of SGLT2 inhibitor-related reports to reports of acidosis in patients treated with the two most commonly used DPP4 inhibitors: sitagliptin and saxagliptin...
July 24, 2017: Diabetes/metabolism Research and Reviews
https://www.readbyqxmd.com/read/28733630/plasma-dipeptidyl-peptidase-4-activity-is-associated-with-left-ventricular-systolic-function-in-patients-with-st-segment-elevation-myocardial-infarction
#4
Jing Wei Li, Yun Dai Chen, Yu Qi Liu, Jin Da Wang, Wei Ren Chen, Ying Qian Zhang, Qiang Ma
Plasma dipeptidyl-peptidase-4 activity (DPP4a) is inversely associated with left ventricular function in patients with heart failure (HF) or diabetes. However, the association between DPP4a and left ventricular function in ST-segment elevation myocardial infarction (STEMI) patients has not been reported. We studied this association in 584 consecutive STEMI patients at a tertiary referral center from July 2014 to October 2015. DPP4a and plasma N-terminal prohormone of B-type natriuretic peptide (NT-proBNP) levels were quantified by enzymatic assays...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28715446/active-subfractions-of-abelmoschus-esculentus-substantially-prevent-free-fatty-acid-induced-%C3%AE-cell-apoptosis-via-inhibiting-dipeptidyl-peptidase-4
#5
Chien-Ning Huang, Chau-Jong Wang, Yi-Ju Lee, Chiung-Huei Peng
Lipotoxicity plays an important role in exacerbating type 2 diabetes mellitus (T2DM) and leads to apoptosis of β cells. Recently dipeptidyl peptidase-4 (DPP-4) inhibitors have emerged as a useful tool in the treatment of T2DM. DPP-4 degrades type 1 glucagon-like peptide (GLP-1), and GLP-1 receptor (GLP-1R) signaling has been shown to protect β cells by modulating AMPK/mTOR, PI3K, and Bax. The anti-hyperglycemic effect of Abelmoschus esculentus (AE) is well known, however its mucilage makes it difficult to further examine this effect...
2017: PloS One
https://www.readbyqxmd.com/read/28711492/species-specific-real-time-rt-pcr-analysis-of-expression-of-stromal-cell-genes-in-a-tumor-xenotransplantation-model-in-mice
#6
Evzen Krepela, Petr Busek, Marek Hilser, Zdislava Vanickova, Aleksi Sedo
Human tumor xenografts in mice together with the species-specific analysis of expressed genes allow to study the molecular processes driving tumor growth and progression in vivo and help to develop and evaluate anticancer therapies. In the present work, we designed and validated species-specific real-time RT-PCR assays for discrimination and quantitation of expression of human and mouse transcripts in cancer and stromal cells including dipeptidyl peptidase (DPP) 4, DPP8, DPP9, fibroblast activation protein (FAP) and CXC chemokine receptor 4 in mixed human-mouse biological samples...
July 12, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28710180/dipeptidyl-peptidase-4-regulates-hematopoietic-stem-cell-activation-in-response-to-chronic-stress
#7
Enbo Zhu, Lina Hu, Hongxian Wu, Limei Piao, Guangxian Zhao, Aiko Inoue, Weon Kim, Chenglin Yu, Wenhu Xu, Yasuko K Bando, Xiang Li, Yanna Lei, Chang-Ning Hao, Kyosuke Takeshita, Woo-Shik Kim, Kenji Okumura, Toyoaki Murohara, Masafumi Kuzuya, Xian Wu Cheng
BACKGROUND: DPP4 (Dipeptidyl peptidase-4)-GLP-1 (glucagon-like peptide-1) and its receptor (GLP-1R) axis has been involved in several intracellular signaling pathways. The Adrβ3 (β3-adrenergic receptor)/CXCL12 (C-X-C motif chemokine 12) signal was required for the hematopoiesis. We investigated the novel molecular requirements between DPP4-GLP-1/GLP-1 and Adrβ3/CXCL12 signals in bone marrow (BM) hematopoietic stem cell (HSC) activation in response to chronic stress. METHODS AND RESULTS: Male 8-week-old mice were subjected to 4-week intermittent restrain stress and orally treated with vehicle or the DPP4 inhibitor anagliptin (30 mg/kg per day)...
July 14, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28699892/dpp-4-enzyme-deficiency-protects-kidney-from-acute-ischemia-reperfusion-injury-role-for-remote-intermittent-bowel-ischemia-reperfusion-preconditioning
#8
Yen-Ta Chen, Christopher Glenn Wallace, Chih-Chao Yang, Chih-Hung Chen, Kuan-Hung Chen, Pei-Hsun Sung, Yung-Lung Chen, Han-Tan Chai, Sheng-Ying Chung, Sarah Chua, Fan-Yen Lee, Sheung-Fat Ko, Mel S Lee, Hon-Kan Yip
We analyzed the effects of acute ischemia-reperfusion (KIR) injury on the status of kidney function and architecture in dipeptidyl peptidase4-difficient (DPP4D) rats and the effect of remote small bowel ischemia-reperfusion (BIR) preconditioning. DPP4-deficient (DPP4D) and normal Fischer344 (F344) rats were divided into 6 groups: (1) sham-F344, (2) sham-DPP4D, (3) KIR-F344 (4) KIR-DPP4D, (5) DPP4D-KIR-extendin-9-39 and (6) BIR-KIR-F344. Blood creatinine and urea nitrogen levels and the urinary protein-to-creatinine ratio was higher in KIR-F344 rats than BIR-KIR-F344 or KIR-DPP4D rats 72 h after acute KIR...
July 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28680862/sglt2-inhibitors-as-add-on-therapy-in-type-2-diabetes-a-real-world-study
#9
Héctor Eloy Tamez-Perez, Enrique Delgadillo-Esteban, David Soni-Duque, Mayra Ivonne Hernández-Coria, Alejandra Lorena Tamez-Peña
BACKGROUND: Type 2 diabetes mellitus (T2DM) is a progressive chronic disease associated with severe microvascular and macrovascular complications. Our aim is to assess the real world effectiveness of SGT" inhibitors in achieving metabolic therapeutic goals. METHODS: A retrospective, observational study. Inclusion criteria for patients were a previous diagnosis of type 2 diabetes mellitus, age > 18 years, patients receiving either dapagliflozin 10 mg and/or canagliflozin 300 mg...
2017: Journal of Diabetes and Metabolic Disorders
https://www.readbyqxmd.com/read/28678446/mda-mb-231-and-8701bc-breast-cancer-lines-promote-the-migration-and-invasiveness-of-ecv304-cells-on-2d-and-3d-type-i-collagen-matrix
#10
S Saladino, M Salamone, G Ghersi
Tumor angiogenesis is a multiphasic process, having the extracellular matrix remodeling as critical step. Different classes of proteolytic enzymes in matrix digestion/remodeling are involved. The role of lytic enzymes and their activation mode have not been completely elucidated. Herein, the crosstalk between endothelia and tumor cells, by realization of bi- and three-dimensional endothelial and breast cancer cells co-cultures, were studied in vitro. Particularly, the effects of two tumor conditioned media (TCM) were assessed about endothelial proliferation, migration and invasiveness...
July 5, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28659588/the-dual-dpp4-inhibitor-and-gpr119-agonist-hbk001-regulates-glycemic-control-and-beta-cell-function-ex-and-in-vivo
#11
Yi Huan, Qian Jiang, Gang Li, Guoliang Bai, Tian Zhou, Shuainan Liu, Caina Li, Quan Liu, Sujuan Sun, Miaomiao Yang, Nan Guo, Xing Wang, Shusen Wang, Yaojuan Liu, Guanqiao Wang, Haihong Huang, Zhufang Shen
Glucagon like peptide-1 (GLP-1) plays a vital role in glucose homeostasis and sustaining β-cell function. Currently there are two major methods to enhance endogenous GLP-1 activity; inhibiting dipeptidyl peptidase-4 (DPP4) or activating G protein-coupled receptor 119 (GPR119). Here we describe and validate a novel dual-target compound, HBK001, which can both inhibit DPP4 and activate GPR119 ex and in vivo. We show that HBK001 can promote glucose-stimulated insulin secretion in mouse and human primary islets...
June 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28637594/association-of-plasma-dipeptidyl-peptidase-4-activity-with-non-alcoholic-fatty-liver-disease-in-nondiabetic-chinese-population
#12
Tianpeng Zheng, Bo Chen, Liuxue Yang, Xueping Hu, Xiaoxi Zhang, Hongbo Liu, Linyuan Qin
OBJECTIVE: The pathogenesis of non-alcoholic fatty liver disease (NAFLD) is attributed to a "multi-hits hypothesis" involving insulin resistance, oxidative stress and inflammation. Dipeptidyl peptidase-4 (DPP4) was identified as a novel adipokine capable of enhancing the"multi-hits". Hence, we investigated the association between plasma DPP4 activity and NAFLD in nondiabetic Chinese population. DESIGN AND METHODS: We performed a cross-sectional study using data from 1105 subjects (36-79years) in Guilin between 2015 and 2016...
April 27, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28630069/degradation-of-incretins-and-modulation-of-blood-glucose-levels-by-periodontopathic-bacterial-dipeptidyl-peptidase-4
#13
Yuko Ohara-Nemoto, Manami Nakasato, Yu Shimoyama, Tomomi T Baba, Takeshi Kobayakawa, Toshio Ono, Takashi Yaegashi, Shigenobu Kimura, Takayuki K Nemoto
Severe periodontitis is known to aggravate diabetes mellitus, though molecular events related to that link have not been fully elucidated. Porphyromonas gingivalis, a major pathogen of periodontitis, expresses dipeptidyl peptidase 4 (DPP4), which is involved in regulation of blood glucose levels by cleaving incretins in humans. We examined the enzymatic characteristics of DPP4 from P. gingivalis as well as two other periodontopathic bacteria, Tannerella forsythia and Prevotella intermedia, and determined whether it is capable of regulating blood glucose levels...
June 19, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28623314/comparative-transcriptomic-and-proteomic-analyses-provide-insights-into-the-key-genes-involved-in-high-altitude-adaptation-in-the-tibetan-pig
#14
Bo Zhang, Yangzom Chamba, Peng Shang, Zhixiu Wang, Jun Ma, Liyuang Wang, Hao Zhang
Tibetan pigs that inhabit the Tibetan Plateau exhibit striking phenotypic and physiological differences from lowland pigs, and have adapted well to extreme conditions. However, the mechanisms involved in regulating gene expression at high altitude in these animals are not fully understood. In this study, we obtained transcriptomic and proteomic data from the heart tissues of Tibetan and Yorkshire pigs raised in the highlands (TH and YH) and lowlands (TL and YL) via RNA-seq and iTRAQ (isobaric tags for relative and absolute quantitation) analyses, respectively...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28620698/potential-disease-biomarkers-dipeptidyl-peptidase-4-and-fibroblast-activation-protein
#15
REVIEW
Roger Yazbeck, Simone E Jaenisch, Catherine A Abbott
The importance of the dipeptidyl peptidase 4 (DPP4) gene family in regulating critical biochemical pathways continues to emerge. The two most well-studied members of the family, DPP4 and fibroblast activation protein (FAP), have been investigated both as therapeutic targets for disease and as diagnostic biomarkers. The interest in DPP4 and FAP as potential disease biomarkers has been driven primarily by observations of altered expression profiles in inflammatory diseases and cancer. Furthermore, the stability and persistence of soluble DPP4 and FAP in the serum make them attractive candidate serology markers...
June 16, 2017: Protoplasma
https://www.readbyqxmd.com/read/28619058/the-regulatory-role-of-dpp4-in-atherosclerotic-disease
#16
REVIEW
Lihua Duan, Xiaoquan Rao, Chang Xia, Sanjay Rajagopalan, Jixin Zhong
The increasing prevalence of atherosclerosis has become a worldwide health concern. Although significant progress has been made in the understanding of atherosclerosis pathogenesis, the underlying mechanisms are not fully understood. Recent studies suggest dipeptidyl peptidase-4 (DPP4), a regulator of inflammation and metabolism, may be involved in the development of atherosclerotic diseases. There has been increasing clinical and pre-clinical evidence showing DPP4-incretin axis is involved in cardiovascular disease...
June 15, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28615725/transcriptome-analysis-reveals-similarities-between-human-blood-cd3-cd56-bright-cells-and-mouse-cd127-innate-lymphoid-cells
#17
David S J Allan, Ana Sofia Cerdeira, Anuisa Ranjan, Christina L Kirkham, Oscar A Aguilar, Miho Tanaka, Richard W Childs, Cynthia E Dunbar, Jack L Strominger, Hernan D Kopcow, James R Carlyle
For many years, human peripheral blood natural killer (NK) cells have been divided into functionally distinct CD3(-) CD56(bright) CD16(-) and CD3(-) CD56(dim) CD16(+) subsets. Recently, several groups of innate lymphoid cells (ILC), distinct from NK cells in development and function, have been defined in mouse. A signature of genes present in mouse ILC except NK cells, defined by Immunological Genome Project studies, is significantly over-represented in human CD56(bright) cells, by gene set enrichment analysis...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28587613/prognostic-value-of-plasma-dpp4-activity-in-st-elevation-myocardial-infarction
#18
Jing-Wei Li, Yun-Dai Chen, Wei-Ren Chen, Qi You, Bo Li, Hao Zhou, Ying Zhang, Tian-Wen Han
BACKGROUND: Dipeptidyl peptidase-4 (DPP4) regulates blood glucose levels and inflammation, and it is also implicated in the pathophysiological process of myocardial infarction (MI). Plasma DPP4 activity (DPP4a) may provide prognostic information regarding outcomes for ST-segment elevation MI (STEMI) patients. METHODS: Blood samples were obtained from 625 consecutively admitted, percutaneous coronary intervention-treated STEMI patients with a mean age of 57 years old...
June 6, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28585374/svmdlf-a-novel-r-based-web-application-for-prediction-of-dipeptidyl-peptidase-4-inhibitors
#19
Sharat Chandra, Jyotsana Pandey, Akhilesh K Tamrakar, Mohammad Imran Siddiqi
Dipeptidyl peptidase 4 (DPP4) is a well-known target for the antidiabetic drugs. However, currently available DPP4 inhibitor screening assays are costly and labor-intensive. It is important to create a robust in-silico method to predict the activity of DPP4 inhibitor for the new lead finding. Here, we introduce a R based web application SVMDLF (SVM based DPP4 Lead Finder) to predict the inhibitor of DPP4; based on support vector machine (SVM) model, predictions of which are confirmed by in-vitro biological evaluation...
June 6, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28575350/dipeptidyl-peptidase-iv-as-a-prognostic-marker-and-therapeutic-target-in-papillary-thyroid-carcinoma
#20
Jie-Jen Lee, Tao-Yeuan Wang, Chien-Liang Liu, Ming-Nan Chien, Ming-Jen Chen, Yi-Chiung Hsu, Ching-Hsiang Leung, Shih-Ping Cheng
Context: Dipeptidyl peptidase IV (DPP4) is overexpressed in thyroid cancer and certain malignancies. Furthermore, DPP4 has been identified as a discriminatory marker for thyroid cancer. However, it remains unclear whether DPP4 expression plays a prognostic role. Objective: The aim of this study was to investigate the expression and function of DPP4 in thyroid cancer and the mechanisms involved. Design: We determined the expression of DPP4 by immunohistochemistry in tissue microarrays of thyroid tumors...
May 26, 2017: Journal of Clinical Endocrinology and Metabolism
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