A
Alexander Quaas
Researcher at University of Hamburg
Publications - 149
Citations - 3979
Alexander Quaas is an academic researcher from University of Hamburg. The author has contributed to research in topics: Medicine & Internal medicine. The author has an hindex of 28, co-authored 106 publications receiving 2943 citations.
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Journal ArticleDOI
Matrix Stiffness Modulates Proliferation, Chemotherapeutic Response and Dormancy in Hepatocellular Carcinoma Cells
Joerg Schrader,Joerg Schrader,Timothy T. Gordon-Walker,Rebecca L. Aucott,Marielle Van Deemter,Alexander Quaas,Shaun V. Walsh,Daniel Benten,Stuart J. Forbes,Rebecca G. Wells,John P. Iredale +10 more
TL;DR: increasing matrix stiffness promotes proliferation and chemotherapeutic resistance, whereas a soft environment induces reversible cellular dormancy and stem cell characteristics in HCC, which has implications for both the treatment of primary HCC and the prevention of tumor outgrowth from disseminated tumor cells.
Journal ArticleDOI
Impaired intrahepatic hepatitis B virus productivity contributes to low viremia in most HBeAg-negative patients.
Tassilo Volz,Marc Lütgehetmann,Paul Wachtler,Anna Jacob,Alexander Quaas,John M. Murray,Maura Dandri,Joerg Petersen +7 more
TL;DR: Analysis of HBV RNA transcripts showed that impaired virion productivity in HBeAg-negative individuals was due to lower steady-state levels of pregenomic RNA produced per cccDNA, which can arise without emergence of H beAg variants and without affecting HBsAg production.
Journal ArticleDOI
Frequent homogeneous HER-2 amplification in primary and metastatic adenocarcinoma of the esophagus.
Uta Reichelt,Peer Duesedau,Maria C. Tsourlakis,Alexander Quaas,Björn C Link,Paulus G. Schurr,Jussuf T. Kaifi,Stephanie J. Gros,Emre F. Yekebas,Andreas H. Marx,Ronald Simon,Jakob R. Izbicki,Guido Sauter +12 more
TL;DR: It is concluded that esophageal adenocarcinomas belong to those cancer types with relevant frequency high-level Her-2 gene amplification clinical trials or individual case studies investigating the response of metastatic HER-2-positive esophagal cancers to Herceptin® should be undertaken.
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Infliximab as a rescue treatment in difficult-to-treat autoimmune hepatitis
Christina Weiler-Normann,Christoph Schramm,Alexander Quaas,C Wiegard,C Glaubke,N Pannicke,Sina Möller,Ansgar W. Lohse +7 more
TL;DR: Infliximab may be considered as rescue therapy in patients with difficult-to-treat autoimmune hepatitis, albeit treatment may be associated with infectious complications.
Journal ArticleDOI
FOXP3+ regulatory T cells in autoimmune hepatitis are fully functional and not reduced in frequency
Moritz Peiseler,Marcial Sebode,Björn Franke,Frederike Wortmann,Dorothee Schwinge,Alexander Quaas,Udo Baron,Sven Olek,C Wiegard,Ansgar W. Lohse,Christina Weiler-Normann,Christoph Schramm,Johannes Herkel +12 more
TL;DR: The frequency and function of circulating Treg cells is not impaired inAIH, and analysis of FOXP3+ Treg in liver histology revealed that the intrahepatic Treg frequency was higher in AIH patients than in NASH patients and correlated with the inflammatory activity of the liver.