@article{LiedtkeHofmannJakobetal.2020, author = {Liedtke, Daniel and Hofmann, Christine and Jakob, Franz and Klopocki, Eva and Graser, Stephanie}, title = {Tissue-Nonspecific Alkaline Phosphatase—A Gatekeeper of Physiological Conditions in Health and a Modulator of Biological Environments in Disease}, series = {Biomolecules}, volume = {10}, journal = {Biomolecules}, number = {12}, publisher = {MDPI}, issn = {2218-273X}, doi = {10.3390/biom10121648}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-220096}, year = {2020}, abstract = {Tissue-nonspecific alkaline phosphatase (TNAP) is a ubiquitously expressed enzyme that is best known for its role during mineralization processes in bones and skeleton. The enzyme metabolizes phosphate compounds like inorganic pyrophosphate and pyridoxal-5′-phosphate to provide, among others, inorganic phosphate for the mineralization and transportable vitamin B6 molecules. Patients with inherited loss of function mutations in the ALPL gene and consequently altered TNAP activity are suffering from the rare metabolic disease hypophosphatasia (HPP). This systemic disease is mainly characterized by impaired bone and dental mineralization but may also be accompanied by neurological symptoms, like anxiety disorders, seizures, and depression. HPP characteristically affects all ages and shows a wide range of clinical symptoms and disease severity, which results in the classification into different clinical subtypes. This review describes the molecular function of TNAP during the mineralization of bones and teeth, further discusses the current knowledge on the enzyme's role in the nervous system and in sensory perception. An additional focus is set on the molecular role of TNAP in health and on functional observations reported in common laboratory vertebrate disease models, like rodents and zebrafish.}, language = {en} } @article{ManukjanWiegeringReindletal.2020, author = {Manukjan, Georgi and Wiegering, Verena and Reindl, Tobias and Strauß, Gabriele and Klopocki, Eva and Schulze, Harald and Andres, Oliver}, title = {Novel variants in FERMT3 and RASGRP2 - Genetic linkage in Glanzmann-like bleeding disorders}, series = {Pediatric Blood \& Cancer}, volume = {67}, journal = {Pediatric Blood \& Cancer}, number = {2}, doi = {10.1002/pbc.28078}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-208129}, pages = {e28078}, year = {2020}, abstract = {Defects of platelet intracellular signaling can result in severe platelet dysfunction. Several mutations in each of the linked genes FERMT3 and RASGRP2 on chromosome 11 causing a Glanzmann-like bleeding phenotype have been identified so far. We report on novel variants in two unrelated pediatric patients with severe bleeding diathesis—one with leukocyte adhesion deficiency type III due to a homozygous frameshift in FERMT3 and the other with homozygous variants in both, FERMT3 and RASGRP2 . We focus on the challenging genetic and functional variant assessment and aim to accentuate the risk of obtaining misleading results due to the phenomenon of genetic linkage.}, language = {en} }