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https://www.readbyqxmd.com/read/27796462/novel-mutations-in-serpinf1-result-in-rare-osteogenesis-imperfecta-type-vi
#1
Jian-Yi Wang, Yi Liu, Li-Jie Song, Fang Lv, Xiao-Jie Xu, A San, Jian Wang, Huan-Ming Yang, Zi-Ying Yang, Yan Jiang, Ou Wang, Wei-Bo Xia, Xiao-Ping Xing, Mei Li
Osteogenesis imperfecta (OI) is a group of inherited disorders characterized by recurrent fragile fractures. Serpin peptidase inhibitor, clade F, member 1 (SERPINF1) is known to cause a distinct, extremely rare autosomal recessive form of type VI OI. Here we report, for the first time, the detection of SERPINF1 mutations in Chinese OI patients. We designed a novel targeted next-generation sequencing panel of OI-related genes to identify pathogenic mutations, which were confirmed with Sanger sequencing and by co-segregation analysis...
October 28, 2016: Calcified Tissue International
https://www.readbyqxmd.com/read/27706701/analysis-of-fkbp10-serpinh1-and-serpinf1-genes-in-patients-with-osteogenesis-imperfecta
#2
C Barbirato, M Trancozo, M R G O Rebouças, V Sipolatti, V R R Nunes, F Paula
Osteogenesis imperfecta (OI) is a heterogeneous disorder that causes fragility, deformity, and fractures in bones. A large number of genes that are associated with the disease have been identified in the last decade; this makes the genetic diagnosis of OI more difficult. To improve our knowledge of the genetic mutation profile in OI we used single-stranded conformation polymorphism screening and automated sequencing to investigate the SERPINH1, FKBP10, and SERPINF1 genes, which are related to recessive OI, in 23 unrelated Brazilian patients...
September 2, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27579219/pigment-epithelium-derived-factor-pedf-normalizes-matrix-defects-in-ipscs-derived-from-osteogenesis-imperfecta-type-vi
#3
Glenn S Belinsky, Leanne Ward, Chuhan Chung
Osteogenesis imperfecta (OI) Type VI is characterized by a defect in bone mineralization, which results in multiple fractures early in life. Null mutations in the PEDF gene, Serpinf1, are the cause of OI VI. Whether PEDF restoration in a murine model of OI Type VI could improve bone mass and function was previously unknown. In Belinsky et al, we provided evidence that PEDF delivery enhanced bone mass and improved parameters of bone function in vivo. Further, we demonstrated that PEDF temporally inhibits Wnt signaling to enhance osteoblast differentiation...
2016: Rare Diseases
https://www.readbyqxmd.com/read/27530920/pigment-epithelium-derived-factor-upregulates-expression-of-vascular-endothelial-growth-factor-by-human-mesenchymal-stem-cells-possible-role-in-pedf-regulated-matrix-mineralization
#4
Feng Li, Gillian B Armstrong, Joyce Tombran-Tink, Christopher Niyibizi
Pigment epithelium-derived factor (PEDF) encoded by serpinf1 is a potent antiangiogenic factor found in a wide variety of fetal and adult tissues. Several reports have shown that lack of PEDF leads to osteogenesis imperfecta (OI) type VI whose hallmark is a defect in mineralization that leads to excessive osteoid build up that fails to mineralize. Because PEDF is antiangiogenic factor it would pose serious consequences on bone development and healing of fractures. To understand possible mechanisms by which PEDF plays a role in bone development and regulation of matrix mineralization, we determined the effects of exogenous PEDF on vascular endothelial growth factor (VEGF) expression by human mesenchymal stem cells (hMSCs) and mechanisms of its regulation by PEDF...
September 23, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27515936/heterogeneity-of-metastatic-melanoma-%C3%A2-correlation-of-mitf-with-its-transcriptional-targets-mlsn1-pedf-hmb-45-and-mart-1
#5
Sarvenaz Zand, Elizabeth Buzney, Lyn M Duncan, Soheil S Dadras
OBJECTIVES: Histologic and molecular heterogeneity is well recognized in malignant melanoma; however, the diversity of expression of new and classic melanoma markers has not been correlated in serial sections of metastases. METHODS: We examined and correlated the expression of microphthalmia transcription factor (MITF) with its transcriptional targets, including melastatin (MLSN1/TRPM1), pigment epithelium-derived factor (SERPINF1/PEDF), SILV/PMEL17/GP100 (human melanoma black 45 [HMB-45]), and melanoma antigen recognized by T cells 1 (MART-1)/MLANA, in 13 melanoma metastases in lymph nodes of 13 patients...
September 2016: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/27509835/dna-sequence-analysis-in-598-individuals-with-a-clinical-diagnosis-of-osteogenesis-imperfecta-diagnostic-yield-and-mutation-spectrum
#6
G Bardai, P Moffatt, F H Glorieux, F Rauch
: We detected disease-causing mutations in 585 of 598 individuals (98 %) with typical features of osteogenesis imperfecta (OI). In mild OI, only collagen type I encoding genes were involved. In moderate to severe OI, mutations in 12 different genes were found; 11 % of these patients had mutations in recessive genes. INTRODUCTION: OI is usually caused by mutations in COL1A1 or COL1A2, the genes encoding collagen type I alpha chains, but mutations in at least 16 other genes have also been associated with OI...
August 11, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/27462403/adipocyte-nuclei-captured-from-vat-and-sat
#7
Suresh Ambati, Ping Yu, Elizabeth C McKinney, Muthugapatti K Kandasamy, Diane Hartzell, Clifton A Baile, Richard B Meagher
BACKGROUND: Obesity-related comorbidities are thought to result from the reprogramming of the epigenome in numerous tissues and cell types, and in particular, mature adipocytes within visceral and subcutaneous adipose tissue, VAT and SAT. The cell-type specific chromatin remodeling of mature adipocytes within VAT and SAT is poorly understood, in part, because of the difficulties of isolating and manipulating large fragile mature adipocyte cells from adipose tissues. METHODS: We constructed MA-INTACT (Mature Adipocyte-Isolation of Nuclei TAgged in specific Cell Types) mice using the adiponectin (ADIPOQ) promoter (ADNp) to tag the surface of mature adipocyte nuclei with a reporter protein...
2016: BMC Obesity
https://www.readbyqxmd.com/read/27127101/pigment-epithelium-derived-factor-restoration-increases-bone-mass-and-improves-bone-plasticity-in-a-model-of-osteogenesis-imperfecta-type-vi-via-wnt3a-blockade
#8
Glenn S Belinsky, Bharath Sreekumar, Jillian W Andrejecsk, W Mark Saltzman, Jingjing Gong, Raimund I Herzog, Samantha Lin, Valerie Horsley, Thomas O Carpenter, Chuhan Chung
Null mutations in for pigment epithelium-derived factor (PEDF), the protein product of the SERPINF1 gene, are the cause of osteogenesis imperfecta (OI) type VI. The PEDF-knockout (KO) mouse captures crucial elements of the human disease, including diminished bone mineralization and propensity to fracture. Our group and others have demonstrated that PEDF directs human mesenchymal stem cell (hMSC) commitment to the osteoblast lineage and modulates Wnt/β-catenin signaling, a major regulator of bone development; however, the ability of PEDF to restore bone mass in a mouse model of OI type VI has not been determined...
August 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/27056980/mutations-and-altered-expression-of-serpinf1-in-patients-with-familial-otosclerosis
#9
Joanna L Ziff, Michael Crompton, Harry R F Powell, Jeremy A Lavy, Christopher P Aldren, Karen P Steel, Shakeel R Saeed, Sally J Dawson
Otosclerosis is a relatively common heterogenous condition, characterized by abnormal bone remodelling in the otic capsule leading to fixation of the stapedial footplate and an associated conductive hearing loss. Although familial linkage and candidate gene association studies have been performed in recent years, little progress has been made in identifying disease-causing genes. Here, we used whole-exome sequencing in four families exhibiting dominantly inherited otosclerosis to identify 23 candidate variants (reduced to 9 after segregation analysis) for further investigation in a secondary cohort of 84 familial cases...
April 7, 2016: Human Molecular Genetics
https://www.readbyqxmd.com/read/27049463/quantitative-proteomic-analysis-of-mice-corneal-tissues-reveals-angiogenesis-related-proteins-involved-in-corneal-neovascularization
#10
Minqian Shen, Yimin Tao, Yifan Feng, Xing Liu, Fei Yuan, Hu Zhou
Corneal neovascularization (CNV) was induced in Balb/c mice by alkali burns in the central area of the cornea with a diameter of 2.5mm. After fourteen days, the cornea from one eye was collected for histological staining for CNV examination, while the cornea from the other eye of the same mouse was harvested for proteomic analysis. The label-free quantitative proteomic approach was applied to analyze five normal corneal tissues (normal group mice n=5) and five corresponding neovascularized corneal tissues (model group mice n=5)...
July 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/26924529/mutations-in-subunits-of-the-activating-signal-cointegrator-1-complex-are-associated-with-prenatal-spinal-muscular-atrophy-and-congenital-bone-fractures
#11
Ellen Knierim, Hiromi Hirata, Nicole I Wolf, Susanne Morales-Gonzalez, Gudrun Schottmann, Yu Tanaka, Sabine Rudnik-Schöneborn, Mickael Orgeur, Klaus Zerres, Stefanie Vogt, Anne van Riesen, Esther Gill, Franziska Seifert, Angelika Zwirner, Janbernd Kirschner, Hans Hilmar Goebel, Christoph Hübner, Sigmar Stricker, David Meierhofer, Werner Stenzel, Markus Schuelke
Transcriptional signal cointegrators associate with transcription factors or nuclear receptors and coregulate tissue-specific gene transcription. We report on recessive loss-of-function mutations in two genes (TRIP4 and ASCC1) that encode subunits of the nuclear activating signal cointegrator 1 (ASC-1) complex. We used autozygosity mapping and whole-exome sequencing to search for pathogenic mutations in four families. Affected individuals presented with prenatal-onset spinal muscular atrophy (SMA), multiple congenital contractures (arthrogryposis multiplex congenita), respiratory distress, and congenital bone fractures...
March 3, 2016: American Journal of Human Genetics
https://www.readbyqxmd.com/read/26921338/melanoma-cells-block-pedf-production-in-fibroblasts-to-induce-the-tumor-promoting-phenotype-of-cancer-associated-fibroblasts
#12
Nkechiyere G Nwani, Maria L Deguiz, Benilde Jimenez, Elena Vinokour, Oleksii Dubrovskyi, Andrey Ugolkov, Andrew P Mazar, Olga V Volpert
Loss of pigment epithelium-derived factor (PEDF, SERPINF1) in cancer cells is associated with poor prognosis and metastasis, but the contribution of stromal PEDF to cancer evolution is poorly understood. Therefore, we investigated the role of fibroblast-derived PEDF in melanoma progression. We demonstrate that normal dermal fibroblasts expressing high PEDF levels attenuated melanoma growth and angiogenesis in vivo, whereas PEDF-depleted fibroblasts exerted tumor-promoting effects. Accordingly, mice with global PEDF knockout were more susceptible to melanoma metastasis...
April 15, 2016: Cancer Research
https://www.readbyqxmd.com/read/26815784/osteogenesis-imperfecta-type-vi-in-individuals-from-northern-canada
#13
Leanne Ward, Ghalib Bardai, Pierre Moffatt, Hadil Al-Jallad, Pamela Trejo, Francis H Glorieux, Frank Rauch
Osteogenesis imperfecta (OI) type VI is a recessively inherited form of OI that is caused by mutations in SERPINF1, the gene coding for pigment-epithelium derived factor (PEDF). Here, we report on two apparently unrelated children with OI type VI who had the same unusual homozygous variant in intron 6 of SERPINF1 (c.787-10C>G). This variant created a novel splice site that led to the in-frame addition of three amino acids to PEDF (p.Lys262_Ile263insLeuSerGln). Western blotting showed that skin fibroblasts with this mutation produced PEDF but failed to secrete it...
June 2016: Calcified Tissue International
https://www.readbyqxmd.com/read/26791873/screening-for-potential-serum-biomarkers-in-rat-mesangial-proliferative-nephritis
#14
Yang Lu, Xiaoniao Chen, Zhong Yin, Shuying Zhu, Di Wu, Xiangmei Chen
Mesangial proliferative nephritis (MesPGN) is a common kidney disease worldwide. The main feature of the disease is mesangial cell proliferation-induced injury to kidney function. In this study, we explored serum biomarkers for kidney function injury in anti-Thy1 nephritis. We found that mesangial proliferation were increased on days 5 and 7, and recovered by day 14 in anti-Thy1 nephritis. 24-h urine protein, the ratio of urine protein to urine creatine, serum creatine, and blood urea nitrogen, were increased at days 5 and 7 in the model...
March 2016: Proteomics
https://www.readbyqxmd.com/read/26479384/relationships-between-circulating-urea-concentrations-and-endometrial-function-in-postpartum-dairy-cows
#15
Zhangrui Cheng, Chike F Oguejiofor, Theerawat Swangchan-Uthai, Susan Carr, D Claire Wathes
Both high and low circulating urea concentrations, a product of protein metabolism, are associated with decreased fertility in dairy cows through poorly defined mechanisms. The rate of involution and the endometrial ability to mount an adequate innate immune response after calving are both critical for subsequent fertility. Study 1 used microarray analysis to identify genes whose endometrial expression 2 weeks postpartum correlated significantly with the mean plasma urea per cow, ranging from 3.2 to 6.6 mmol/L...
August 14, 2015: Animals: An Open Access Journal From MDPI
https://www.readbyqxmd.com/read/26277786/expression-profiling-of-angiogenesis-related-genes-in-brain-metastases-of-lung-cancer-and-melanoma
#16
Aysegül Ilhan-Mutlu, Christian Siehs, Anna Sophie Berghoff, Gerda Ricken, Georg Widhalm, Ludwig Wagner, Matthias Preusser
Brain metastases (BM) are the most common brain tumors of adults and are associated with fatal prognosis. Formation of new blood vessels, named angiogenesis, was proposed to be the main hallmark of the growth of BM. Previous preclinical evidence revealed that angiogenic blockage might be considered for treatment; however, there were varying responses. In this study, we aimed to characterize the expression pattern of angiogenesis-related genes in BM of lung cancer and melanoma, which might be of importance for the different responses against anti-angiogenic treatment...
January 2016: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/25868797/the-effect-of-serpinf1-in-frame-mutations-in-osteogenesis-imperfecta-type-vi
#17
Hadil Al-Jallad, Telma Palomo, Peter Roughley, Francis H Glorieux, Marc D McKee, Pierre Moffatt, Frank Rauch
Osteogenesis imperfecta type VI is caused by mutations in SERPINF1, which codes for pigment-epithelium derived factor (PEDF). Most of the reported SERPINF1 mutations lead to premature termination codons, but three in-frame insertion or deletion mutations have also been reported. It is not clear how such in-frame mutations lead to OI type VI. In the present study we therefore investigated how SERPINF1 in-frame mutations affect the intracellular localization and secretion of PEDF. Skin fibroblasts affected by SERPINF1 in-frame mutations transcribed SERPINF1 at slightly reduced levels but secretion of PEDF was markedly diminished...
July 2015: Bone
https://www.readbyqxmd.com/read/25565926/novel-deletion-of-serpinf1-causes-autosomal-recessive-osteogenesis-imperfecta-type-vi-in-two-brazilian-families
#18
Renata Moldenhauer Minillo, Nara Sobreira, Maria de Fatima de Faria Soares, Julie Jurgens, Hua Ling, Kurt N Hetrick, Kimberly F Doheny, David Valle, Decio Brunoni, Ana B Alvarez Perez
Autosomal recessive osteogenesis imperfecta (OI) accounts for 10% of all OI cases, and, currently, mutations in 10 genes (CRTAP, LEPRE1, PPIB, SERPINH1, FKBP10, SERPINF1, SP7, BMP1, TMEM38B, and WNT1) are known to be responsible for this form of the disease. PEDF is a secreted glycoprotein of the serpin superfamily that maintains bone homeostasis and regulates osteoid mineralization, and it is encoded by SERPINF1, currently associated with OI type VI (MIM 172860). Here, we report a consanguineous Brazilian family in which multiple individuals from at least 4 generations are affected with a severe form of OI, and we also report an unrelated individual from the same small city in Brazil with a similar but more severe phenotype...
December 2014: Molecular Syndromology
https://www.readbyqxmd.com/read/25450603/mutations-in-patients-with-osteogenesis-imperfecta-from-consanguineous-indian-families
#19
Joshi Stephen, Katta Mohan Girisha, Ashwin Dalal, Anju Shukla, Hitesh Shah, Priyanka Srivastava, Uwe Kornak, Shubha R Phadke
Osteogenesis imperfecta (OI) is a spectrum of genetic disorders with decreased bone density and bone fragility. Most of the cases of OI are inherited in autosomal dominant fashion with mutations in COL1A1 or COL1A2 genes. Over last few years, twelve genes for autosomal recessive OI have been identified. In this study we have evaluated seven patients with OI from consanguineous Indian families. Homozygosity mapping using SNP microarray was done and selected candidate genes were sequenced. Candidate genes were identified in four out of seven patients studied...
January 2015: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/25447045/a-novel-role-for-microphthalmia-associated-transcription-factor-regulated-pigment-epithelium-derived-factor-during-melanoma-progression
#20
Soheil S Dadras, Richard J Lin, Gita Razavi, Akinori Kawakami, Jinyan Du, Erez Feige, Daniel A Milner, Massimo F Loda, Scott R Granter, Michael Detmar, Hans R Widlund, Martin A Horstmann, David E Fisher
Microphthalmia-associated transcription factor (MITF) acts via pigment epithelium-derived factor (PEDF), an antiangiogenic protein, to regulate retinal pigment epithelium migration. PEDF expression and/or regulation during melanoma development have not been investigated previously. Using immunohistochemistry, we determined expression of PEDF in common and dysplastic melanocytic nevi, melanoma in situ, invasive melanoma, and metastatic melanoma (n = 102). PEDF expression was consistently decreased in invasive and metastatic melanoma, compared with nevi and melanoma in situ (P < 0...
January 2015: American Journal of Pathology
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