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https://www.readbyqxmd.com/read/28211523/pedf-mediates-pathological-neovascularization-by-regulating-macrophage-recruitment-and-polarization-in-the-mouse-model-of-oxygen-induced-retinopathy
#1
Sha Gao, Changwei Li, Yanji Zhu, Yanuo Wang, Ailing Sui, Yisheng Zhong, Bing Xie, Xi Shen
Macrophages have been demonstrated to play a proangiogenic role in retinal pathological vascular growth. Pigment epithelium-derived factor (PEDF) works as a powerful endogenous angiogenesis inhibitor, but its role in macrophage recruitment and polarization is largely unknown. To explore the underlying mechanisms, we first evaluated macrophage polarization in the retinas of the oxygen-induced retinopathy (OIR) mouse model. Compared to that in normal controls, M1- and M2-like macrophages were all abundantly increased in the retinas of OIR mice...
February 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28197761/the-pigment-epithelium-derived-factor-pedf-an-important-potential-therapeutic-agent-for-infantile-hemangioma
#2
Ming Li, Yanru Chen, Zhihui Guo, Yide Xie, Yakuan Zhou, Chenghong Jiang, Xiaosong Chen
In previous studies, the expression and the role of proangiogenic factors in infantile hemangiomas have been well studied. However, the role of angiogenic inhibitors has been revealed rarely. The expression of PEDF, as the strongest and safe endogenous inhibitor, is still unrecognized until the current study. In order to investigate the expression and significance of the pigment epithelium-derived factor (PEDF) in the proliferating and regressing phases of infantile hemangiomas, the expression of PEDF, VEGF, Ki-67, and CD34 protein in hemangioma tissues was examined with immunohistochemical polymer HRP method in 42 cases during the proliferative phase, 40 cases during the regressing phase, and 11 cases of non-involuting congenital hemangiomas (NICHs)...
February 14, 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28191465/pedf-is-associated-with-the-termination-of-chondrocyte-phenotype-and-catabolism-of-cartilage-tissue
#3
P Klinger, S Lukassen, F Ferrazzi, A B Ekici, T Hotfiel, B Swoboda, T Aigner, K Gelse
Objective. To investigate the expression and target genes of pigment epithelium-derived factor (PEDF) in cartilage and chondrocytes, respectively. Methods. We analyzed the expression pattern of PEDF in different human cartilaginous tissues including articular cartilage, osteophytic cartilage, and fetal epiphyseal and growth plate cartilage, by immunohistochemistry and quantitative real-time (qRT) PCR. Transcriptome analysis after stimulation of human articular chondrocytes with rhPEDF was performed by RNA sequencing (RNA-Seq) and confirmed by qRT-PCR...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28187313/il-20-contributes-to-low-grade-inflammation-and-weight-gain-in-the-psammomys-obesus
#4
Helena Cucak, Lise Høj Thomsen, Alexander Rosendahl
The metabolic syndrome has been demonstrated in gene deficient animals, e.g. db/db mice, to include a systemic inflammation leading to insulin resistance, obesity and type 2 diabetes (T2D). To determine the importance of inflammation in obesity and diabetes, in a normal non-genetically modified species, an intervention study with neutralizing anti-IL-20 antibodies was conducted in the spontaneous T2D model Psammomys obesus. All IL-20 receptor chains were expressed on protein level in the Psammomys obesus. Neutralization of IL-20 did not modulate blood glucose, HbA1c, insulin levels or lymphocyte numbers after five weeks treatment although a trend to reduced weight gain rate was observed upon anti-IL-20 treatment...
February 7, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28173817/pigment-epithelium-derived-factor-alleviates-endothelial-injury-by-inhibiting-wnt-%C3%AE-catenin-pathway
#5
Shouyuan Ma, Shutong Yao, Hua Tian, Peng Jiao, Nana Yang, Ping Zhu, Shucun Qin
BACKGROUND: Oxidized low-density lipoprotein (ox-LDL) can induce endothelial injury and plays a vital role in the procession and development of atherosclerosis. Little is known regarding whether Wnt/β-catenin pathway is involved in ox-LDL-induced endothelial injury or whether it further promotes atherosclerosis via increased oxidative stress. This study aimed to investigate the role of Wnt/β-catenin pathway in ox-LDL-induced vascular endothelial injury and determine whether pigment epithelium-derived factor (PEDF) could alleviate ox-LDL-induced endothelial injury by inhibiting Wnt/β-catenin pathway...
February 7, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28167820/pigment-epithelium-derived-factor-attenuates-myocardial-fibrosis-via-inhibiting-endothelial-to-mesenchymal-transition-in-rats-with-acute-myocardial-infarction
#6
Hao Zhang, Hongliang Hui, Zhimin Li, Jiajun Pan, Xia Jiang, Tengteng Wei, Huazhu Cui, Lei Li, Xulong Yuan, Teng Sun, Zhiwei Liu, Zhongming Zhang, Hongyan Dong
Endothelial mesenchymal transition (EndMT) plays a critical role in the pathogenesis and progression of interstitial and perivascular fibrosis after acute myocardial infarction (AMI). Pigment epithelium-derived factor (PEDF) is shown to be a new therapeutic target owing to its protective role in cardiovascular disease. In this study, we tested the hypothesis that PEDF is an endogenous inhibitor of EndMT and represented a novel mechanism for its protective effects against overactive cardiac fibrosis after AMI...
February 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28122882/effects-of-microrna-200b-on-the-development-of-diabetic-retinopathy-by-targeting-vegfa-gene
#7
En-Hui Li, Qin-Zhu Huang, Gao-Chun Li, Zhen-Yang Xiang, Xin Zhang
This study explored the effect of microRNA-200b (miR-200b) on the development of diabetic retinopathy (DR) by targeting VEGFA gene. The study populations consisted of 255 DR patients (case group) and 253 healthy people (control group), while the expressions of miR-200b and VEGFA mRNA were detected by quantitative real-time polymerase chain reaction (qRT-PCR). Bioinformatics software and dual-luciferase reporter assay were used to confirm VEGFA as a target gene of miR-200b. Also, a total of 70 Wistar male rats were selected and randomly assigned into blank, normal control (NC), miR-200b mimics, miR-200b inhibitors, miR-200b inhibitors + siVEGFA and siVEGFA groups (n = 10/group) respectively...
January 25, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28122611/pigment-epithelium-derived-factor-pedf-mediates-cartilage-matrix-loss-in-an-age-dependent-manner-under-inflammatory-conditions
#8
Daisy S Nakamura, Judith M Hollander, Tomoya Uchimura, Heber C Nielsen, Li Zeng
BACKGROUND: Inflammation is a major cause of cartilage destruction and leads to the imbalance of metabolic activities in the arthritic joint. Pigment epithelium-derived factor (PEDF) has been reported to have both pro- and anti-inflammatory activities in various cell types and to be upregulated in the arthritic joint, but its role in joint destruction is unclear. Our aim was to investigate the role of PEDF in cartilage degeneration under inflammatory conditions. METHODS: PEDF was ectopically expressed in primary human articular chondrocytes, and catabolic gene expression and protein secretion in response to the pro-inflammatory cytokine interleukin 1 beta (IL-1β) were evaluated...
January 25, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28111231/pigment-epithelium-derived-factor-improves-tnf%C3%AE-induced-hepatic-steatosis-in-grass-carp-ctenopharyngodon-idella
#9
Zhou Yang, Jian Sun, Hong Ji, Xiao-Chen Shi, Yang Li, Zhen-Yu Du, Li-Qiao Chen
Pro-inflammatory cytokines, such as tumor necrosis factor alpha (TNFα), may contribute to hepatic steatosis in the situation of excess lipid accumulation in farmed fish. Pigment epithelium-derived factor (PEDF) is an endogenous anti-inflammatory factor and promotes lipolysis. Accordingly, we isolated PEDF from grass carp and investigated its role in TNFα-induced hepatic steatosis. Sequence analysis showed that PEDF gene, which possesses 8 exons and 7 introns, encodes a protein with 409 amino acids. PEDF was a critical determinant of the transcriptional response to nutrient availability in grass carp...
January 19, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28106169/inhibition-of-nucks-facilitates-corneal-recovery-following-alkali-burn
#10
Ming-Wai Poon, Dan Jiang, Peng Qin, Yuelin Zhang, Beiying Qiu, Sumit Chanda, Vinay Tergaonkar, Qing Li, Ian Y Wong, Zhendong Yu, Hung-Fat Tse, David S H Wong, Qizhou Lian
Corneal wound healing involves a complex cascade of cytokine-controlled cellular events, including inflammatory and angiogenesis responses that are regulated by transcriptional chromatin remodeling. Nuclear Ubiquitous Casein and cyclin-dependent Kinase Substrate (NUCKS) is a key chromatin modifier and transcriptional regulator of metabolic signaling. In this study, we investigated the role of NUCKS in corneal wound healing by comparing its effects on corneal alkali burn in NUCKS knockout (NKO) and NUCKS wild-type (NWT) mice...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28105231/pigment-epithelium-derived-factor-has-a-role-in-the-progression-of-papillary-thyroid-carcinoma-by-affecting-the-hif1%C3%AE-vegf-signaling-pathway
#11
Yichen Lv, Yu Sun, Tiefeng Shi, Chenlei Shi, Huadong Qin, Zhaozhu Li
The progression mechanism of papillary thyroid carcinoma (PTC) remains largely unknown. Accumulating evidence has suggested that various targets of pigment epithelium-derived factor (PEDF) are able to inhibit cancer progression. The aim of the present study was to examine PEDF expression in PTC patients and to investigate its relationship with aggressive clinicopathological features, as well as to explore whether PEDF affects the progression of PTC via the hypoxia-inducible factor 1α (HIF1α)-vascular endothelial growth factor (VEGF) pathway...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28091556/vegf-b-promotes-recovery-of-corneal-innervations-and-trophic-functions-in-diabetic-mice
#12
Guohu Di, Xiaowen Zhao, Xia Qi, Songmei Zhang, Lu Feng, Weiyun Shi, Qingjun Zhou
Vascular endothelial growth factor (VEGF)-B possesses the capacity of promoting injured peripheral nerve regeneration and restore their sensory and trophic functions. However, the contribution and mechanism of VEGF-B in diabetic peripheral neuropathy remains unclear. In the present study, we investigated the expression and role of VEGF-B in diabetic corneal neuropathy by using type 1 diabetic mice and cultured trigeminal ganglion (TG) neurons. Hyperglycemia attenuated the endogenous expression of VEGF-B in regenerated diabetic corneal epithelium, but not that of VEGF receptors in diabetic TG neurons and axons...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28074058/intracellular-atp-in-balance-of-pro-and-anti-inflammatory-cytokines-in-adipose-tissue-with-and-without-tissue-expansion
#13
J H Lee, Y Zhang, Z Zhao, X Ye, X Zhang, H Wang, J Ye
OBJECTIVES: To understand the mechanism of white fat expansion in the presence of inflammation, we examined the balance of pro- and anti-inflammatory cytokines in epididymal fat during weight gain in DIO mice. METHODS: The pro- and anti-inflammatory cytokines were examined in white fat of diet-induced obese mice and lean mice. The mechanism of gene expression was investigated with a focus on intracellular ATP (iATP). ATP activity was tested in cellular and non-cellular systems in activation of serine kinases (IKKβ, JNK and ERK)...
January 11, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/27988246/identification-of-neuronal-and-angiogenic-growth-factors-in-an-in-vitro-blood-brain-barrier-model-system-relevance-in-barrier-integrity-and-tight-junction-formation-and-complexity
#14
Christian Freese, Sanshiro Hanada, Petra Fallier-Becker, C James Kirkpatrick, Ronald E Unger
We previously demonstrated that the co-cultivation of endothelial cells with neural cells resulted in an improved integrity of the in vitro blood-brain barrier (BBB), and that this model could be useful to evaluate the transport properties of potential central nervous system disease drugs through the microvascular brain endothelial. In this study we have used real-time PCR, fluorescent microscopy, protein arrays and enzyme-linked immunosorbent assays to determine which neural- and endothelial cell-derived factors are produced in the co-culture and improve the integrity of the BBB...
December 15, 2016: Microvascular Research
https://www.readbyqxmd.com/read/27973457/pedf-inhibits-the-activation-of-nlrp3-inflammasome-in-hypoxia-cardiomyocytes-through-pedf-receptor-phospholipase-a2
#15
Zhongxin Zhou, Zhu Wang, Qiuhua Guan, Fan Qiu, Yufeng Li, Zhiwei Liu, Hao Zhang, Hongyan Dong, Zhongming Zhang
The nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3) inflammasome has been linked to sterile inflammation, which is involved in ischemic injury in myocardial cells. Pigment epithelium-derived factor (PEDF) is a multifunctional secreted glycoprotein with many biological activities, such as anti-inflammatory, antioxidant and anti-angiogenic properties. However, it is not known whether and how PEDF acts to regulate the activation of the NLRP3 inflammasome in cardiomyocytes. In the present study, we used the neonatal cardiomyocytes models of ischemia-like conditions to evaluate the mitochondrial fission and the activation of the NLRP3 inflammasome...
December 12, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27936049/clinicopathological-features-and-prognosis-of-papillary-thyroid-microcarcinoma-for-surgery-and-relationships-with-the-brafv600e-mutational-status-and-expression-of-angiogenic-factors
#16
Chenlei Shi, Yong Guo, Yichen Lv, Abiyasi Nanding, Tiefeng Shi, Huadong Qin, Jianjun He
OBJECTIVE: To investigate the clinicopathological characteristics of papillary thyroid microcarcinoma (PTMC) for surgery by comparing the difference between PTMC and larger papillary thyroid carcinoma (LPTC). METHODS: We analyzed the differences in the clinicopathological characteristics, prognosis, B-type RAF kinase (BRAF)V600E mutational status and expression of angiogenic factors, including pigment epithelium-derived factor (PEDF), Vascular Endothelial Growth Factor (VEGF), and hypoxia-inducible factor alpha subunit (HIF-1α), between PTMC and LPTC by retrospectively reviewing the records of 251 patients with papillary thyroid carcinoma, 169 with PTMC, and 82 with LPTC (diameter >1 cm)...
2016: PloS One
https://www.readbyqxmd.com/read/27931509/transplantation-of-human-urine-derived-stem-cells-transfected-with-pigment-epithelium-derived-factor-to-protect-erectile-function-in-a-rat-model-of-cavernous-nerve-injury
#17
Qiyun Yang, Xin Chen, Tao Zheng, Dayu Han, Heng Zhang, Yanan Shi, Jun Bian, Xiangzhou Sun, Kai Xia, Xiaoyan Liang, Guihua Liu, Yuanyuan Zhang, Chunhua Deng
The aim of this study was to investigate whether intracavernous injection of urine-derived stem cells (USCs) or USCs genetically modified with pigment epithelium-derived factor (PEDF) could protect the erectile function and cavernous structure in a bilateral cavernous nerve injury-induced erectile dysfunction (CNIED) rat model. USCs were cultured from the urine of six healthy male donors. Seventy-five rats were randomly divided into five groups (n=15 per group): sham, bilateral cavernous nerve (CN) crush injury (BCNI), USC, USCGFP+, and USCGFP/PEDF+ groups...
November 2016: Cell Transplantation
https://www.readbyqxmd.com/read/27914705/pigment-epithelium-derived-factor-a-noninhibitory-serine-protease-inhibitor-is-renoprotective-by-inhibiting-the-wnt-pathway
#18
Xuemin He, Rui Cheng, Kyoungmin Park, Siribhinya Benyajati, Gennadiy Moiseyev, Chengyi Sun, Lorin E Olson, Yanhui Yang, Bonnie K Eby, Kai Lau, Jian-Xing Ma
Pigment epithelium-derived factor (PEDF) expression is downregulated in the kidneys of diabetic rats, and delivery of PEDF suppressed renal fibrotic factors in these animals. PEDF has multiple functions including anti-angiogenic, anti-inflammatory and antifibrotic activities. Since the mechanism underlying its antifibrotic effect remains unclear, we studied this in several murine models of renal disease. Renal PEDF levels were significantly reduced in genetic models of type 1 and type 2 diabetes (Akita and db/db, respectively), negatively correlating with Wnt signaling activity in the kidneys...
March 2017: Kidney International
https://www.readbyqxmd.com/read/27855634/identification-of-novel-targets-of-diabetic-nephropathy-and-pedf-peptide-treatment-using-rna-seq
#19
Ana Rubin, Anna C Salzberg, Yuka Imamura, Anzor Grivitishvilli, Joyce Tombran-Tink
BACKGROUND: Diabetic nephropathy (DN) is a major complication of type1 and type 2 diabetes. Understanding how diabetes regulate transcriptome dynamics in DN is important for understanding the biology of the disease and for guiding development of new treatments. RESULTS: We analyzed the kidney transcriptome of a DN mouse model, D2.B6-Ins2 (Akita) /MatbJ, before/after treatment with P78-PEDF. Age, weight, and gender-matched mice and wild-type (wt) littermates were treated at 6 weeks (early treatment) or 12 weeks (late treatment) of age for the duration of 6 weeks...
November 17, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27820950/the-ingenious-interactions-between-macrophages-and-functionally-plastic-retinal-pigment-epithelium-cells
#20
Takahiro Yamawaki, Eiko Ito, Atsushi Mukai, Morio Ueno, Jun Yamada, Chie Sotozono, Shigeru Kinoshita, Junji Hamuro
Purpose: The purpose of this study was to clarify the interactions between macrophages (MPs) and RPE cells in coculture systems to investigate the functional plasticity of RPE cells. Methods: Adherent peritoneal cells or murine MP cell line Raw 264.7 was cocultured with primary RPE cells taken from C57BL/6 mice, with or without lipopolysaccharide (LPS) or TNF-α stimulation. The cytokine levels of the culture supernatants (CSs) were then analyzed with the Bio-Plex murine 23-Plex Panel Assay Kit (Bio-Rad Laboratories)...
November 1, 2016: Investigative Ophthalmology & Visual Science
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