@article{WeissenbergerWeissenbergerWagenbrenneretal.2020,
  author    = {Weissenberger, Manuel and Weissenberger, Manuela H. and Wagenbrenner, Mike and Heinz, Tizian and Reboredo, Jenny and Holzapfel, Boris M. and Rudert, Maximilian and Groll, J{\"u}rgen and Evans, Christopher H. and Steinert, Andre F.},
  title     = {Different types of cartilage neotissue fabricated from collagen hydrogels and mesenchymal stromal cells via SOX9, TGFB1 or BMP2 gene transfer},
  series = {PLoS One},
  volume    = {15},
  journal   = {PLoS One},
  number    = {8},
  doi       = {10.1371/journal.pone.0237479},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-230494},
  year      = {2020},
  abstract  = {Objective As native cartilage consists of different phenotypical zones, this study aims to fabricate different types of neocartilage constructs from collagen hydrogels and human mesenchymal stromal cells (MSCs) genetically modified to express different chondrogenic factors. Design Human MSCs derived from bone-marrow of osteoarthritis (OA) hips were genetically modified using adenoviral vectors encoding sex-determining region Y-type high-mobility-group-box (SOX)9,transforming growth factor beta (TGFB) 1or bone morphogenetic protein (BMP) 2cDNA, placed in type I collagen hydrogels and maintained in serum-free chondrogenic media for three weeks. Control constructs contained unmodified MSCs or MSCs expressing GFP. The respective constructs were analyzed histologically, immunohistochemically, biochemically, and by qRT-PCR for chondrogenesis and hypertrophy. Results Chondrogenesis in MSCs was consistently and strongly induced in collagen I hydrogels by the transgenesSOX9,TGFB1andBMP2as evidenced by positive staining for proteoglycans, chondroitin-4-sulfate (CS4) and collagen (COL) type II, increased levels of glycosaminoglycan (GAG) synthesis, and expression of mRNAs associated with chondrogenesis. The control groups were entirely non-chondrogenic. The levels of hypertrophy, as judged by expression of alkaline phosphatase (ALP) and COL X on both the protein and mRNA levels revealed different stages of hypertrophy within the chondrogenic groups (BMP2>TGFB1>SOX9). Conclusions Different types of neocartilage with varying levels of hypertrophy could be generated from human MSCs in collagen hydrogels by transfer of genes encoding the chondrogenic factorsSOX9,TGFB1andBMP2. This technology may be harnessed for regeneration of specific zones of native cartilage upon damage.},
  language  = {en}
}
@article{SteinertWeissenbergerKunzetal.2012,
  author    = {Steinert, Andre F. and Weissenberger, Manuel and Kunz, Manuela and Gilbert, Fabian and Ghivizzani, Steven C. and Goebel, Sascha and Jakob, Franz and N{\"o}th, Ulrich and Rudert, Maximilian},
  title     = {Indian hedgehog gene transfer is a chondrogenic inducer of human mesenchymal stem cells},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-75425},
  year      = {2012},
  abstract  = {Introduction: To date, no single most-appropriate factor or delivery method has been identified for the purpose of mesenchymal stem cell (MSC)-based treatment of cartilage injury. Therefore, in this study we tested whether gene delivery of the growth factor Indian hedgehog (IHH) was able to induce chondrogenesis in human primary MSCs, and whether it was possible by such an approach to modulate the appearance of chondrogenic hypertrophy in pellet cultures in vitro. Methods: First-generation adenoviral vectors encoding the cDNA of the human IHH gene were created by cre-lox recombination and used alone or in combination with adenoviral vectors, bone morphogenetic protein-2 (Ad.BMP- 2), or transforming growth factor beta-1 (Ad.TGF-b1) to transduce human bone-marrow derived MSCs at 5 × 102 infectious particles/cell. Thereafter, 3 × 105 cells were seeded into aggregates and cultured for 3 weeks in serumfree medium, with untransduced or marker gene transduced cultures as controls. Transgene expressions were determined by ELISA, and aggregates were analysed histologically, immunohistochemically, biochemically and by RT-PCR for chondrogenesis and hypertrophy. Results: IHH, TGF-b1 and BMP-2 genes were equipotent inducers of chondrogenesis in primary MSCs, as evidenced by strong staining for proteoglycans, collagen type II, increased levels of glycosaminoglycan synthesis, and expression of mRNAs associated with chondrogenesis. IHH-modified aggregates, alone or in combination, also showed a tendency to progress towards hypertrophy, as judged by the expression of alkaline phosphatase and stainings for collagen type X and Annexin 5. Conclusion: As this study provides evidence for chondrogenic induction of MSC aggregates in vitro via IHH gene delivery, this technology may be efficiently employed for generating cartilaginous repair tissues in vivo.},
  subject      = {Medizin},
  language  = {en}
}
@phdthesis{WeissenbergergebKunz2023,
  author    = {Weissenberger [geb. Kunz], Manuela-Hermina},
  title     = {Adenoviraler Gentransfer von SOX9 zur chondrogenen Differenzierung von humanen mesenchymalen Stammzellen},
  doi       = {10.25972/OPUS-32122},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-321221},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2023},
  abstract  = {Der adenovirale SOX9-Gentransfer induziert nach 3-w{\"o}chiger in vitro Pelletkultur die chondrogene Differenzierung humaner mesenchymaler Stammzellen in Pelletkultur wirksamer als der TGFB1 Gentransfer mit geringerer Chondrozytenhypertrophie. Eine solche Technologie k{\"o}nnte zuk{\"u}nftig in vivo die Bildung von stabilerem hyalinem Knorpelregeneratgewebe erm{\"o}glichen.},
  subject      = {Hyaliner Knorpel},
  language  = {de}
}
@article{SeilerEbertRudertetal.2022,
  author    = {Seiler, Jonas and Ebert, Regina and Rudert, Maximilian and Herrmann, Marietta and Leich, Ellen and Weißenberger, Manuela and Horas, Konstantin},
  title     = {Bone metastases of diverse primary origin frequently express the VDR (vitamin D receptor) and CYP24A1},
  series = {Journal of Clinical Medicine},
  volume    = {11},
  journal   = {Journal of Clinical Medicine},
  number    = {21},
  issn      = {2077-0383},
  doi       = {10.3390/jcm11216537},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-297377},
  year      = {2022},
  abstract  = {Active vitamin D (1,25(OH)2D3) is known to exert direct anti-cancer actions on various malignant tissues through binding to the vitamin D receptor (VDR). These effects have been demonstrated in breast, prostate, renal and thyroid cancers, which all have a high propensity to metastasise to bone. In addition, there is evidence that vitamin D catabolism via 24-hydroxylase (CYP24A1) is altered in tumour cells, thus, reducing local active vitamin D levels in cancer cells. The aim of this study was to assess VDR and CYP24A1 expression in various types of bone metastases by using immunohistochemistry. Overall, a high total VDR protein expression was detected in 59\% of cases (39/66). There was a non-significant trend of high-grade tumours towards the low nuclear VDR expression (p = 0.07). Notably, patients with further distant metastases had a reduced nuclear VDR expression (p = 0.03). Furthermore, a high CYP24A1 expression was detected in 59\% (39/66) of bone metastases. There was a significant positive correlation between nuclear VDR and CYP24A1 expression (p = 0.001). Collectively, the VDR and CYP24A1 were widely expressed in a multitude of bone metastases, pointing to a potential role of vitamin D signalling in cancer progression. This is of high clinical relevance, as vitamin D deficiency is frequent in patients with bone metastases.},
  language  = {en}
}