TY  - JOUR
A1  - van Koolwijk, Leonieke M. E.
A1  - Ramdas, Wishal D.
A1  - Ikram, M. Kamran
A1  - Jansonius, Nomdo M.
A1  - Pasutto, Francesca
A1  - Hys, Pirro G.
A1  - Macgregor, Stuart
A1  - Janssen, Sarah F.
A1  - Hewitt, Alex W.
A1  - Viswanathan, Ananth C.
A1  - ten Brink, Jacoline B.
A1  - Hosseini, S. Mohsen
A1  - Amin, Najaf
A1  - Despriet, Dominiek D. G.
A1  - Willemse-Assink, Jacqueline J. M.
A1  - Kramer, Rogier
A1  - Rivadeneira, Fernando
A1  - Struchalin, Maksim
A1  - Aulchenko, Yurii S.
A1  - Weisschuh, Nicole
A1  - Zenkel, Matthias
A1  - Mardin, Christian Y.
A1  - Gramer, Eugen
A1  - Welge-Lüssen, Ulrich
A1  - Montgomery, Grant W.
A1  - Carbonaro, Francis
A1  - Young, Terri L.
A1  - Bellenguez, Céline
A1  - McGuffin, Peter
A1  - Foster, Paul J.
A1  - Topouzis, Fotis
A1  - Mitchell, Paul
A1  - Wang, Jie Jin
A1  - Wong, Tien Y.
A1  - Czudowska, Monika A.
A1  - Hofman, Albert
A1  - Uitterlinden, Andre G.
A1  - Wolfs, Roger C. W.
A1  - de Jong, Paulus T. V. M.
A1  - Oostra, Ben A.
A1  - Paterson, Andrew D.
A1  - Mackey, David A.
A1  - Bergen, Arthur A. B.
A1  - Reis, Andre
A1  - Hammond, Christopher J.
A1  - Vingerling, Johannes R.
A1  - Lemij, Hans G.
A1  - Klaver, Caroline C. W.
A1  - van Duijn, Cornelia M.
T1  - Common Genetic Determinants of Intraocular Pressure and Primary Open-Angle Glaucoma
JF  - PLoS Genetics
N2  - Intraocular pressure (IOP) is a highly heritable risk factor for primary open-angle glaucoma and is the only target for current glaucoma therapy. The genetic factors which determine IOP are largely unknown. We performed a genome-wide association study for IOP in 11,972 participants from 4 independent population-based studies in The Netherlands. We replicated our findings in 7,482 participants from 4 additional cohorts from the UK, Australia, Canada, and the Wellcome Trust Case-Control Consortium 2/Blue Mountains Eye Study. IOP was significantly associated with rs11656696, located in GAS7 at 17p13.1 (p = 1.4 x 10\(^{-8}\)), and with rs7555523, located in TMCO1 at 1q24.1 (p = 1.6 x 10\(^{-8}\)). In a meta-analysis of 4 case-control studies (total N = 1,432 glaucoma cases), both variants also showed evidence for association with glaucoma (p = 2.4 x 10\(^{-2}\) for rs11656696 and p = 9.1 x 10\(^{-4}\) for rs7555523). GAS7 and TMCO1 are highly expressed in the ciliary body and trabecular meshwork as well as in the lamina cribrosa, optic nerve, and retina. Both genes functionally interact with known glaucoma disease genes. These data suggest that we have identified two clinically relevant genes involved in IOP regulation.
KW  - expression
KW  - goldmann applanation tonometer
KW  - central corneal thickness
KW  - genome-wide scan
KW  - beaver-dam eye
KW  - to-disc ratio
KW  - onset
KW  - association
KW  - identification
KW  - population
Y1  - 2012
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-131378
VL  - 8
IS  - 5
ER  - 
TY  - JOUR
A1  - van Dinther, Maarten
A1  - Zhang, Juan
A1  - Weidauer, Stella E.
A1  - Boschert, Verena
A1  - Muth, Eva-Maria
A1  - Knappik, Achim
A1  - de Gorter, David J. J.
A1  - van Kasteren, Puck B.
A1  - Frisch, Christian
A1  - Müller, Thomas D.
A1  - ten Dijke, Peter
T1  - Anti-Sclerostin Antibody Inhibits Internalization of Sclerostin and Sclerostin-Mediated Antagonism of Wnt/LRP6 Signaling
JF  - PLoS ONE
N2  - Sclerosteosis is a rare high bone mass disease that is caused by inactivating mutations in the SOST gene. Its gene product, Sclerostin, is a key negative regulator of bone formation and might therefore serve as a target for the anabolic treatment of osteoporosis. The exact molecular mechanism by which Sclerostin exerts its antagonistic effects on Wnt signaling in bone forming osteoblasts remains unclear. Here we show that Wnt3a-induced transcriptional responses and induction of alkaline phosphatase activity, an early marker of osteoblast differentiation, require the Wnt co-receptors LRP5 and LRP6. Unlike Dickkopf1 (DKK1), Sclerostin does not inhibit Wnt-3a-induced phosphorylation of LRP5 at serine 1503 or LRP6 at serine 1490. Affinity labeling of cell surface proteins with \([^{125} I]\) Sclerostin identified LRP6 as the main specific Sclerostin receptor in multiple mesenchymal cell lines. When cells were challenged with Sclerostin fused to recombinant green fluorescent protein (GFP) this was internalized, likely via a Clathrin-dependent process, and subsequently degraded in a temperature and proteasome-dependent manner. Ectopic expression of LRP6 greatly enhanced binding and cellular uptake of Sclerostin-GFP, which was reduced by the addition of an excess of non-GFP-fused Sclerostin. Finally, an anti-Sclerostin antibody inhibited the internalization of Sclerostin-GFP and binding of Sclerostin to LRP6. Moreover, this antibody attenuated the antagonistic activity of Sclerostin on canonical Wnt-induced responses.
KW  - gene
KW  - rat model
KW  - Dickkopf proteins
KW  - postmenopausal osteoporosis
KW  - increases bone-formation
KW  - WNT
KW  - LRP6
KW  - density
KW  - receptor
KW  - ligand
Y1  - 2013
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-130981
VL  - 8
IS  - 4
ER  - 
TY  - JOUR
A1  - Boschert, Verena
A1  - van Dinther, Maarten
A1  - Weidauer, Stella
A1  - van Pee, Katharina
A1  - Muth, Eva-Maria
A1  - ten Dijke, Peter
A1  - Mueller, Thomas D.
T1  - Mutational Analysis of Sclerostin Shows Importance of the Flexible Loop and the Cystine-Knot for Wnt-Signaling Inhibition
JF  - PLoS ONE
N2  - The cystine-knot containing protein Sclerostin is an important negative regulator of bone growth and therefore represents a promising therapeutic target. It exerts its biological task by inhibiting the Wnt (wingless and int1) signaling pathway, which participates in bone formation by promoting the differentiation of mesenchymal stem cells to osteoblasts. The core structure of Sclerostin consists of three loops with the first and third loop (Finger 1 and Finger 2) forming a structured \(\beta\)-sheet and the second loop being unstructured and highly flexible. Biochemical data showed that the flexible loop is important for binding of Sclerostin to Wnt co-receptors of the low-density lipoprotein related-protein family (LRP), by interacting with the Wnt co-receptors LRP5 or -6 it inhibits Wnt signaling. To further examine the structural requirements for Wnt inhibition, we performed an extensive mutational study within all three loops of the Sclerostin core domain involving single and multiple mutations as well as truncation of important regions. By this approach we could confirm the importance of the second loop and especially of amino acids Asn92 and Ile94 for binding to LRP6. Based on a Sclerostin variant found in a Turkish family suffering from Sclerosteosis we generated a Sclerostin mutant with cysteines 84 and 142 exchanged thereby removing the third disulfide bond of the cystine-knot. This mutant binds to LRP6 with reduced binding affinity and also exhibits a strongly reduced inhibitory activity against Wnt1 thereby showing that also elements outside the flexible loop are important for inhibition of Wnt by Sclerostin. Additionally, we examined the effect of the mutations on the inhibition of two different Wnt proteins, Wnt3a and Wnt1. We could detect clear differences in the inhibition of these proteins, suggesting that the mechanism by which Sclerostin antagonizes Wnt1 and Wnt3a is fundamentally different.
KW  - Wnt signaling cascade
KW  - binding analysis
KW  - osteoblasts
KW  - sequence motif analysis
KW  - biological locomotion
KW  - signal inhibition
KW  - cell binding assay
KW  - luciferase
Y1  - 2013
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-129862
VL  - 8
IS  - 11
ER  - 
TY  - JOUR
A1  - Prantl, Thomas
A1  - Zeck, Timo
A1  - Bauer, Andre
A1  - Ten, Peter
A1  - Prantl, Dominik
A1  - Yahya, Ala Eddine Ben
A1  - Ifflaender, Lukas
A1  - Dmitrienko, Alexandra
A1  - Krupitzer, Christian
A1  - Kounev, Samuel
T1  - A Survey on Secure Group Communication Schemes With Focus on IoT Communication
JF  - IEEE Access
N2  - A key feature for Internet of Things (IoT) is to control what content is available to each user. To handle this access management, encryption schemes can be used. Due to the diverse usage of encryption schemes, there are various realizations of 1-to-1, 1-to-n, and n-to-n schemes in the literature. This multitude of encryption methods with a wide variety of properties presents developers with the challenge of selecting the optimal method for a particular use case, which is further complicated by the fact that there is no overview of existing encryption schemes. To fill this gap, we envision a cryptography encyclopedia providing such an overview of existing encryption schemes. In this survey paper, we take a first step towards such an encyclopedia by creating a sub-encyclopedia for secure group communication (SGC) schemes, which belong to the n-to-n category. We extensively surveyed the state-of-the-art and classified 47 different schemes. More precisely, we provide (i) a comprehensive overview of the relevant security features, (ii) a set of relevant performance metrics, (iii) a classification for secure group communication schemes, and (iv) workflow descriptions of the 47 schemes. Moreover, we perform a detailed performance and security evaluation of the 47 secure group communication schemes. Based on this evaluation, we create a guideline for the selection of secure group communication schemes.
KW  - Internet of Things
KW  - encryption
KW  - secure group communication
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-300257
VL  - 10
SP  - 99944
EP  - 99962
ER  -