Publications by authors named "Katharina JanSSen"

To better understand and model neurological, in particular neurodegenerative diseases, human induced pluripotent stem cells (hiPSCs) offer a great source for generation of neural cells. We provide a protocol for the differentiation of hiPSc-derived astrocytes in vitro. This protocol not only is chemically defined, that is, it does not use serum, but also allows for the expansion of astrocyte progenitor cells and mature astrocytes.

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Reproducibility in molecular and cellular studies is fundamental to scientific discovery. To establish the reproducibility of a well-defined long-term neuronal differentiation protocol, we repeated the cellular and molecular comparison of the same two iPSC lines across five distinct laboratories. Despite uncovering acceptable variability within individual laboratories, we detect poor cross-site reproducibility of the differential gene expression signature between these two lines.

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From time to time, severe or fatal injuries caused by small caliber air rifle projectiles are seen. In forensic sciences, the theoretical wounding potential of these weapons and projectiles is widely known. Usually, shots against the skull were reported and, in these cases, penetrating the eyes or thin bone layers of the temporal region.

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If a case of physical child abuse is suspected in Germany, the general feeling is often that "it does not matter whether you make a report or not" because, generally, no conviction is made anyway. This study investigates the juridical analysis of complaint cases of physical child abuse [criminal complaint parag. 225 StGB (German penal code) with filial victim].

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Purpose: We investigated the potential value of maternal serum copeptin, midregional proatrial natriuretic peptide (MR-proANP) and Procalcitonin (PCT) levels at 11-13 weeks' gestation in the prediction of preeclampsia (PE) in a case-control study.

Materials And Methods: Maternal serum concentration of copeptin, MR-proANP and PCT were measured at 11-13 weeks' gestation in cases of PE (n = 35) and controls (n = 100). The PE group was divided into early-onset PE (EO-PE) and late-onset PE (LO-PE).

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A broad spectrum of diseases is characterized by myelin abnormalities and/or oligodendrocyte pathology. In most, if not all, of these diseases, early activation of microglia occurs. Our knowledge regarding the factors triggering early microglia activation is, however, incomplete.

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A broad spectrum of diseases is characterized by myelin abnormalities, oligodendrocyte pathology, and concomitant glia activation, among multiple sclerosis (MS). Our knowledge regarding the factors triggering gliosis and demyelination is scanty. Chemokines are pivotal for microglia and astrocyte activation and orchestrate critical steps during the formation of central nervous system (CNS) demyelinating lesions.

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In recent years, increasing attention has been paid to the issue of (fatal) child abuse and neglect, largely due to the media attention garnered by some headline-grabbing cases. If media statements are to be believed, such cases may be an increasing phenomenon. With these published accounts in mind, publicly available statistics should be analysed with respect to the question of whether reliable statements can be formulated based on these figures.

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Article Synopsis
  • Proton magnetic resonance spectroscopy (1H-MRS) is used to gather metabolic information to aid in diagnosing conditions like multiple sclerosis (MS), focusing on N-Acetylaspartate (NAA) as a biomarker for neurodegeneration.
  • Loss of oligodendrocytes in MS patients may lead to an accumulation of NAA, which could mask true levels of neurodegeneration, yet the current study shows that NAA levels remain stable despite oligodendrocyte loss.
  • This research supports the idea that NAA quantification is reliable for assessing neurodegeneration in MS, suggesting a need for further studies to explore alternative pathways for NAA metabolism in the absence of aspartoacylase (ASPA).
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We report a case of a 19-year-old woman who developed a persistent uterine hemorrhage after spontaneous delivery of a healthy child. Emergency laparotomy was indicated and then begun under stable circulatory conditions. Cardiac arrest occurred during the course of massive manual compression and packing of the uterus.

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Using a repetitive-sequence-based (rep)-PCR (DiversiLab), we have molecularly typed Acinetobacter nosocomial bloodstream isolates (Acinetobacter baumannii [n = 187], Acinetobacter pittii [n = 23], and Acinetobacter nosocomialis [n = 61]) obtained from patients hospitalized in U.S. hospitals over a 10-year period (1995-2004) during a nationwide surveillance study (Surveillance and Control of Pathogens of Epidemiological Importance [SCOPE]).

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