TY  - THES
A1  - Alexander, Nadine
T1  - Ortsgerichtete simultane Differenzierung von Stammzellen auf proteinmodifizierten Bruschit-Oberflächen
T1  - Site-directed simultaneous differentiation of stem cells on protein-modified bruschite surfaces
N2  - Damit die Knochenregeneration lege artis abläuft ist ein sensibles und komplexes Zusammenspiel einer Reihe von Faktoren notwendig. Neben bestimmten Zelltypen, die für die Knochenregeneration essentiell sind, sind auch eine Reihe von Wachstumsfaktoren notwendig um die Kommunikation zwischen den Zellverbänden zu gewährleisten und die einzelnen Entwicklungsstadien zu steuern und zu regulieren. 
Zur Untersuchung der Möglichkeit, sowohl die Osteokonduktion als auch Vaskularisation eines Scaffolds zu initiieren, wurden in der vorliegenden Arbeit verschiedene Untersuchungsmethoden eingesetzt. Damit wurden adulte humane mesenchymale Stammzellen untersucht, die zur Differenzierung mit den Wachstumsfaktoren bone morphogenetic protein 2 (BMP 2) und/oder vascular endothelial grwoth factor (VEGF) inkubiert und auf Glas- oder Bruschitoberflächen kultiviert wurden. Die Experimente wurden mittels immunologischer Methoden wie Immunfluoreszenz (IF) und Westernblot (WB), sowie über Rasterelektronenmikroskopie (REM) analysiert. Es konnte mit diesen Methoden gezeigt werden, dass die humanen mesenchymalen Stammzellen (hMSC) auf den verschiedenen Substraten adhärierten und proliferierten. Darüber hinaus konnte in der Arbeit nachgewiesen werden, dass unter diesen bestimmten Bedingungen sowohl knöcherne als auch vaskuläre Zellbildung angeregt werden kann. So konnte sowohl auf Glas als auch auf Bruschit mittels IF und REM zum Teil aus hMSC differenzierte Osteoblasten detektiert werden. Diese zeigten die für Osteoblasten typischen Zellfortsätze, mit denen die Osteoblasten mit den Nachbarzellen in Kontakt stehen. Die beginnende Differenzierung zu Osteoblasten bzw. Endothelzellen konnte auch durch Detektion spezfischer Marker, wie z.B. alkalische Phosphatase und PECAM mittels WB gezeigt werden. Jedoch war die in dieser Arbeit zur Untersuchung der ortsgerichteten Differenzierung auf Bruschitsubstrat eingesetzte Methodik nicht geeignet, eindeutige Aussagen zu treffen. Daher müssen zur Untersuchung dieses Vorganges alternative Methoden entwickelt und optimiert werden. 
Bei der vorliegenden Arbeit handelt es sich um eine reine in vitro Studie. Dennoch könnten diese Ergebnisse Hinweise auf das Verhalten von hMSC unter Stimulation mit osteogenen und endothelialen Wachstumsfaktoren in vivo im Tierversuch oder im Menschen liefern. 
Allerdings wird es bei der Übertragung auf eine kombiniertes in vitro- in vivo Vorgehen hinauslaufen, da das ungerichtete Wachstum von Gewebsformationen eine Hürde für in vivo Studien darstellt.
N2  - For bone regeneration a sensitive and complex interaction of a number of factors, like vascular endothelial growth factor (VEGF) and bone morphogentic proteins (BMP2) is necessary. To investigate the possibility of bone osteoconduction and bone vascularization of a scaffold, various methods have been used in this in vitro study. Therefore adult human mesenchymal stem cells were incubated for differentiation with BMP 2 and VEGF and cultured on glass or bruschite surfaces. The experiments were analyzed by different methods such as immunofluorescence, western blotting and scanning electron microscopy. It could be shown, that the human mesenchymal stem cells adhered and proliferated on the different substrates. The differentiation to osteoblasts or endothelial cells was detected by specific markers, like alkaline phosphatase and PECAM. Nevertheless, these results may provide evidence for the behavior of hMSC stimulated by osteogenic and endothelial growth factors in future for in vivo animal or human studies.
KW  - Bruschit
KW  - mesenchymale Stammzellen
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-174481
ER  - 
TY  - JOUR
A1  - Couch, Fergus J.
A1  - Wang, Xianshu
A1  - McGuffog, Lesley
A1  - Lee, Andrew
A1  - Olswold, Curtis
A1  - Kuchenbaecker, Karoline B.
A1  - Soucy, Penny
A1  - Fredericksen, Zachary
A1  - Barrowdale, Daniel
A1  - Dennis, Joe
A1  - Gaudet, Mia M.
A1  - Dicks, Ed
A1  - Kosel, Matthew
A1  - Healey, Sue
A1  - Sinilnikova, Olga M.
A1  - Lee, Adam
A1  - Bacot, Françios
A1  - Vincent, Daniel
A1  - Hogervorst, Frans B. L.
A1  - Peock, Susan
A1  - Stoppa-Lyonnet, Dominique
A1  - Jakubowska, Anna
A1  - Radice, Paolo
A1  - Schmutzler, Rita Katharina
A1  - Domchek, Susan M.
A1  - Piedmonte, Marion
A1  - Singer, Christian F.
A1  - Friedman, Eitan
A1  - Thomassen, Mads
A1  - Hansen, Thomas V. O.
A1  - Neuhausen, Susan L.
A1  - Szabo, Csilla I.
A1  - Blanco, Ingnacio
A1  - Greene, Mark H.
A1  - Karlan, Beth Y.
A1  - Garber, Judy
A1  - Phelan, Catherine M.
A1  - Weitzel, Jeffrey N.
A1  - Montagna, Marco
A1  - Olah, Edith
A1  - Andrulis, Irene L.
A1  - Godwin, Andrew K.
A1  - Yannoukakos, Drakoulis
A1  - Goldgar, David E.
A1  - Caldes, Trinidad
A1  - Nevanlinna, Heli
A1  - Osorio, Ana
A1  - Terry, Mary Beth
A1  - Daly, Mary B.
A1  - van Rensburg, Elisabeth J.
A1  - Hamann, Ute
A1  - Ramus, Susan J.
A1  - Toland, Amanda Ewart
A1  - Caligo, Maria A.
A1  - Olopade, Olufunmilayo I.
A1  - Tung, Nadine
A1  - Claes, Kathleen
A1  - Beattie, Mary S.
A1  - Southey, Melissa C.
A1  - Imyanitov, Evgeny N.
A1  - Tischkowitz, Marc
A1  - Janavicius, Ramunas
A1  - John, Esther M.
A1  - Kwong, Ava
A1  - Diez, Orland
A1  - Kwong, Ava
A1  - Balmaña, Judith
A1  - Barkardottir, Rosa B.
A1  - Arun, Banu K.
A1  - Rennert, Gad
A1  - Teo, Soo-Hwang
A1  - Ganz, Patricia A.
A1  - Campbell, Ian
A1  - van der Hout, Annemarie H.
A1  - van Deurzen, Carolien H. M.
A1  - Seynaeve, Caroline
A1  - Garcia, Encarna B. Gómez
A1  - van Leeuwen, Flora E.
A1  - Meijers-Heijboer, Hanne E. J.
A1  - Gille, Johannes J. P.
A1  - Ausems, Magreet G. E. M.
A1  - Blok, Marinus J.
A1  - Ligtenberg, Marjolinjin J. L.
A1  - Rookus, Matti A.
A1  - Devilee, Peter
A1  - Verhoef, Senno
A1  - van Os, Theo A. M.
A1  - Wijnen, Juul T.
A1  - Frost, Debra
A1  - Ellis, Steve
A1  - Fineberg, Elena
A1  - Platte, Radke
A1  - Evans, D. Gareth
A1  - Izatt, Luise
A1  - Eeles, Rosalind A.
A1  - Adlard, Julian
A1  - Eccles, Diana M.
A1  - Cook, Jackie
A1  - Brewer, Carole
A1  - Douglas, Fiona
A1  - Hodgson, Shirley
A1  - Morrison, Patrick J.
A1  - Side, Lucy E.
A1  - Donaldson, Alan
A1  - Houghton, Catherine
A1  - Rogers, Mark T.
A1  - Dorkins, Huw
A1  - Eason, Jacqueline
A1  - Gregory, Helen
A1  - McCann, Emma
A1  - Murray, Alex
A1  - Calender, Alain
A1  - Hardouin, Agnès
A1  - Berthet, Pascaline
A1  - Delnatte, Capucine
A1  - Nogues, Catherine
A1  - Lasset, Christine
A1  - Houdayer, Claude
A1  - Leroux,, Dominique
A1  - Rouleau, Etienne
A1  - Prieur, Fabienne
A1  - Damiola, Francesca
A1  - Sobol, Hagay
A1  - Coupier, Isabelle
A1  - Venat-Bouvet, Laurence
A1  - Castera, Laurent
A1  - Gauthier-Villars, Marion
A1  - Léoné, Mélanie
A1  - Pujol, Pascal
A1  - Mazoyer, Sylvie
A1  - Bignon, Yves-Jean
A1  - Zlowocka-Perlowska, Elzbieta
A1  - Gronwald, Jacek
A1  - Lubinski,, Jan
A1  - Durda, Katarzyna
A1  - Jaworska, Katarzyna
A1  - Huzarski, Tomasz
A1  - Spurdle, Amanda B.
A1  - Viel, Alessandra
A1  - Peissel, Bernhard
A1  - Bonanni, Bernardo
A1  - Melloni, Guilia
A1  - Ottini, Laura
A1  - Papi, Laura
A1  - Varesco, Liliana
A1  - Tibiletti, Maria Grazia
A1  - Peterlongo, Paolo
A1  - Volorio, Sara
A1  - Manoukian, Siranoush
A1  - Pensotti, Valeria
A1  - Arnold, Norbert
A1  - Engel, Christoph
A1  - Deissler, Helmut
A1  - Gadzicki, Dorothea
A1  - Gehrig, Andrea
A1  - Kast, Karin
A1  - Rhiem, Kerstin
A1  - Meindl, Alfons
A1  - Niederacher, Dieter
A1  - Ditsch, Nina
A1  - Plendl, Hansjoerg
A1  - Preisler-Adams, Sabine
A1  - Engert, Stefanie
A1  - Sutter, Christian
A1  - Varon-Mateeva, Raymenda
A1  - Wappenschmidt, Barbara
A1  - Weber, Bernhard H. F.
A1  - Arver, Brita
A1  - Stenmark-Askmalm, Marie
A1  - Loman, Niklas
A1  - Rosenquist, Richard
A1  - Einbeigi, Zakaria
A1  - Nathanson, Katherine L.
A1  - Rebbeck, Timothy R.
A1  - Blank, Stephanie V.
A1  - Cohn, David E.
A1  - Rodriguez, Gustavo C.
A1  - Small, Laurie
A1  - Friedlander, Michael
A1  - Bae-Jump, Victoria L.
A1  - Fink-Retter, Anneliese
A1  - Rappaport, Christine
A1  - Gschwantler-Kaulich, Daphne
A1  - Pfeiler, Georg
A1  - Tea, Muy-Kheng
A1  - Lindor, Noralane M.
A1  - Kaufman, Bella
A1  - Paluch, Shani Shimon
A1  - Laitman, Yael
A1  - Skytte, Anne-Bine
A1  - Gerdes, Anne-Marie
A1  - Pedersen, Inge Sokilde
A1  - Moeller, Sanne Traasdahl
A1  - Kruse, Torben A.
A1  - Jensen, Uffe Birk
A1  - Vijai, Joseph
A1  - Sarrel, Kara
A1  - Robson, Mark
A1  - Kauff, Noah
A1  - Mulligan, Anna Marie
A1  - Glendon, Gord
A1  - Ozcelik, Hilmi
A1  - Ejlertsen, Bent
A1  - Nielsen, Finn C.
A1  - Jønson, Lars
A1  - Andersen, Mette K.
A1  - Ding, Yuan Chun
A1  - Steele, Linda
A1  - Foretova, Lenka
A1  - Teulé, Alex
A1  - Lazaro, Conxi
A1  - Brunet, Joan
A1  - Pujana, Miquel Angel
A1  - Mai, Phuong L.
A1  - Loud, Jennifer T.
A1  - Walsh, Christine
A1  - Lester, Jenny
A1  - Orsulic, Sandra
A1  - Narod, Steven A.
A1  - Herzog, Josef
A1  - Sand, Sharon R.
A1  - Tognazzo, Silvia
A1  - Agata, Simona
A1  - Vaszko, Tibor
A1  - Weaver, Joellen
A1  - Stravropoulou, Alexandra V.
A1  - Buys, Saundra S.
A1  - Romero, Atocha
A1  - de la Hoya, Miguel
A1  - Aittomäki, Kristiina
A1  - Muranen, Taru A.
A1  - Duran, Mercedes
A1  - Chung, Wendy K.
A1  - Lasa, Adriana
A1  - Dorfling, Cecilia M.
A1  - Miron, Alexander
A1  - Benitez, Javier
A1  - Senter, Leigha
A1  - Huo, Dezheng
A1  - Chan, Salina B.
A1  - Sokolenko, Anna P.
A1  - Chiquette, Jocelyne
A1  - Tihomirova, Laima
A1  - Friebel, Tara M.
A1  - Agnarsson, Bjarne A.
A1  - Lu, Karen H.
A1  - Lejbkowicz, Flavio
A1  - James, Paul A.
A1  - Hall, Per
A1  - Dunning, Alison M.
A1  - Tessier, Daniel
A1  - Cunningham, Julie
A1  - Slager, Susan L.
A1  - Chen, Wang
A1  - Hart, Steven
A1  - Stevens, Kristen
A1  - Simard, Jacques
A1  - Pastinen, Tomi
A1  - Pankratz, Vernon S.
A1  - Offit, Kenneth
A1  - Easton, Douglas F.
A1  - Chenevix-Trench, Georgia
A1  - Antoniou, Antonis C.
T1  - Genome-Wide Association Study in BRCA1 Mutation Carriers Identifies Novel Loci Associated with Breast and Ovarian Cancer Risk
JF  - PLOS Genetics
N2  - BRCA1-associated breast and ovarian cancer risks can be modified by common genetic variants. To identify further cancer risk-modifying loci, we performed a multi-stage GWAS of 11,705 BRCA1 carriers (of whom 5,920 were diagnosed with breast and 1,839 were diagnosed with ovarian cancer), with a further replication in an additional sample of 2,646 BRCA1 carriers. We identified a novel breast cancer risk modifier locus at 1q32 for BRCA1 carriers (rs2290854, P = 2.7 x 10(-8), HR = 1.14, 95% CI: 1.09-1.20). In addition, we identified two novel ovarian cancer risk modifier loci: 17q21.31 (rs17631303, P = 1.4 x 10(-8), HR = 1.27, 95% CI: 1.17-1.38) and 4q32.3 (rs4691139, P = 3.4 x 10(-8), HR = 1.20, 95% CI: 1.17-1.38). The 4q32.3 locus was not associated with ovarian cancer risk in the general population or BRCA2 carriers, suggesting a BRCA1-specific association. The 17q21.31 locus was also associated with ovarian cancer risk in 8,211 BRCA2 carriers (P = 2 x 10(-4)). These loci may lead to an improved understanding of the etiology of breast and ovarian tumors in BRCA1 carriers. Based on the joint distribution of the known BRCA1 breast cancer risk-modifying loci, we estimated that the breast cancer lifetime risks for the 5% of BRCA1 carriers at lowest risk are 28%-50% compared to 81%-100% for the 5% at highest risk. Similarly, based on the known ovarian cancer risk-modifying loci, the 5% of BRCA1 carriers at lowest risk have an estimated lifetime risk of developing ovarian cancer of 28% or lower, whereas the 5% at highest risk will have a risk of 63% or higher. Such differences in risk may have important implications for risk prediction and clinical management for BRCA1 carriers.
KW  - common variants
KW  - susceptibility alleles
KW  - genetic variants
KW  - modifiers
KW  - ZNF365
KW  - investigators
KW  - population
KW  - consortium
KW  - selection
KW  - subtypes
Y1  - 2013
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-127947
SN  - 1553-7404
VL  - 9
IS  - 3
ER  - 
TY  - JOUR
A1  - Egenolf, Nadine
A1  - Altenschildesche, Caren Meyer zu
A1  - Kreß, Luisa
A1  - Eggermann, Katja
A1  - Namer, Barbara
A1  - Gross, Franziska
A1  - Klitsch, Alexander
A1  - Malzacher, Tobias
A1  - Kampik, Daniel
A1  - Malik, Rayaz A.
A1  - Kurth, Ingo
A1  - Sommer, Claudia
A1  - Üçeyler, Nurcan
T1  - Diagnosing small fiber neuropathy in clinical practice: a deep phenotyping study
JF  - Therapeutic Advances in Neurological Disorders
N2  - Background and aims:
Small fiber neuropathy (SFN) is increasingly suspected in patients with pain of uncertain origin, and making the diagnosis remains a challenge lacking a diagnostic gold standard.
	
Methods:
In this case–control study, we prospectively recruited 86 patients with a medical history and clinical phenotype suggestive of SFN. Patients underwent neurological examination, quantitative sensory testing (QST), and distal and proximal skin punch biopsy, and were tested for pain-associated gene loci. Fifty-five of these patients additionally underwent pain-related evoked potentials (PREP), corneal confocal microscopy (CCM), and a quantitative sudomotor axon reflex test (QSART).
	
	
Results:
Abnormal distal intraepidermal nerve fiber density (IENFD) (60/86, 70%) and neurological examination (53/86, 62%) most frequently reflected small fiber disease. Adding CCM and/or PREP further increased the number of patients with small fiber impairment to 47/55 (85%). Genetic testing revealed potentially pathogenic gene variants in 14/86 (16%) index patients. QST, QSART, and proximal IENFD were of lower impact.
	
Conclusion:
We propose to diagnose SFN primarily based on the results of neurological examination and distal IENFD, with more detailed phenotyping in specialized centers.
KW  - algorithm
KW  - diagnosis
KW  - neurological examination
KW  - skin punch biopsy
KW  - small fiber neuropathy
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-232019
SN  - 1756-2864
VL  - 14
ER  - 
TY  - JOUR
A1  - Evdokimov, Dimitar
A1  - Frank, Johanna
A1  - Klitsch, Alexander
A1  - Unterecker, Stefan
A1  - Warrings, Bodo
A1  - Serra, Jordi
A1  - Papagianni, Aikaterini
A1  - Saffer, Nadine
A1  - Meyer zu Altenschildesche, Caren
A1  - Kampik, Daniel
A1  - Malik, Rayaz A.
A1  - Sommer, Claudia
A1  - Üceyler, Nurcan
T1  - Reduction of skin innervation is associated with a severe fibromyalgia phenotype
JF  - Annals of Neurology
N2  - Objective: To assess patterns and impact of small nerve fiber dysfunction and pathology in patients with fibromyalgia syndrome (FMS).

Methods: One hundred seventeen women with FMS underwent neurological examination, questionnaire assessment, neurophysiology assessment, and small fiber tests: skin punch biopsy, corneal confocal microscopy, microneurography, quantitative sensory testing including C-tactile afferents, and pain-related evoked potentials. Data were compared with those of women with major depressive disorder and chronic widespread pain (MD-P) and healthy women.

Results: Intraepidermal nerve fiber density (IENFD) was reduced at different biopsy sites in 63% of FMS patients (MDP: 10%, controls: 18%; p < 0.001 for each). We found 4 patterns of skin innervation in FMS: normal, distally reduced, proximally reduced, and both distally and proximally reduced (p < 0.01 for each compared to controls). Microneurography revealed initial activity-dependent acceleration of conduction velocity upon low frequencies of stimulation in 1A fibers, besides 1B fiber spontaneous activity and mechanical sensitization in FMS patients. FMS patients had elevated warm detection thresholds (p < 0.01), impaired C-tactile afferents (p < 0.05), and reduced amplitudes (p < 0.001) of pain-related evoked potentials compared to controls. Compared to FMS patients with normal skin innervation, those with generalized IENFD reduction had higher pain intensity and impairment due to pain, higher disease burden, more stabbing pain and paresthesias, and more anxiety (p < 0.05 for each). FMS patients with generalized IENFD reduction also had lower corneal nerve fiber density (p < 0.01) and length (p < 0.05).

Interpretation: The extent of small fiber pathology is related to symptom severity in FMS. This knowledge may have implications for the diagnostic classification and treatment of patients with FMS.
KW  - fibromyalgia
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-206168
VL  - 86
IS  - 4
ER  - 
TY  - JOUR
A1  - Klitsch, Alexander
A1  - Evdokimov, Dimitar
A1  - Frank, Johanna
A1  - Thomas, Dominique
A1  - Saffer, Nadine
A1  - Meyer zu Altenschildesche, Caren
A1  - Sisignano, Marco
A1  - Kampik, Daniel
A1  - Malik, Rayaz A.
A1  - Sommer, Claudia
A1  - Üçeyler, Nurcan
T1  - Reduced association between dendritic cells and corneal sub‐basal nerve fibers in patients with fibromyalgia syndrome
JF  - Journal of the Peripheral Nervous System
N2  - In our study, we aimed at investigating corneal langerhans cells (LC) in patients with fibromyalgia syndrome (FMS) and small fiber neuropathy (SFN) as potential contributors to corneal small fiber pathology. We enrolled women with FMS (n = 134) and SFN (n = 41) who underwent neurological examination, neurophysiology, prostaglandin analysis in tear fluid, and corneal confocal microscopy (CCM). Data were compared with those of 60 age‐matched female controls. After screening for dry eye disease, corneal LC were counted and sub‐classified as dendritic (dLC) and non‐dendritic (ndLC) cells with or without nerve fiber association. We further analyzed corneal nerve fiber density (CNFD), length (CNFL), and branch density (CNBD). Neurological examination indicated deficits of small fiber function in patients with SFN. Nerve conduction studies were normal in all participants. Dry eye disease was more prevalent in FMS (17%) and SFN (28%) patients than in controls (5%). Tear fluid prostaglandin levels did not differ between FMS patients and controls. While corneal LC density in FMS and SFN patients was not different from controls, there were fewer dLC in association with nerve fibers in FMS and SFN patients than in controls (P < .01 each). Compared to controls, CNFL was lower in FMS and SFN patients (P < .05 each), CNFD was lower only in FMS patients (P < .05), and CNBD was lower only in SFN patients (P < .001). There was no difference in any CCM parameter between patients with and without dry eyes. Our data indicate changes in corneal innervation and LC distribution in FMS and SFN, potentially based on altered LC signaling.
KW  - corneal confocal microscopy
KW  - fibromyalgia syndrome
KW  - Langerhans cells
KW  - pain
KW  - small fiber neuropathy
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-214150
VL  - 25
IS  - 1
ER  -