Alexandra Doehring

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INTRODUCTION The importance of dopamine D2 receptors (DRD2) for central nervous dopaminergic signalling makes variants in the DRD2 gene potential modulators of the risk or course of various behavioural, psychiatric or neurologic diseases (e.g. addiction, schizophrenia, Parkinson's disease). We developed Pyrosequencing genetic screening assays for single(More)
AIM KCNJ6 coding for potassium inwardly rectifying channels (Kir3.2, GIRK2) is important for opioid receptor transmission. The KCNJ6 rs2070995 AA genotype has been associated with increased opioid analgesic requirements in Japanese. We analyzed its consequences for other opioid effects. METHODS Genotyping was done in 85 methadone-substituted former heroin(More)
BACKGROUND AND AIMS Chronic infection with the hepatitis B virus (HBV) is a major health issue worldwide. Recently, single nucleotide polymorphisms (SNPs) within the human leukocyte antigen (HLA)-DP locus were identified to be associated with HBV infection in Asian populations. Most significant associations were observed for the A alleles of HLA-DPA1 rs3077(More)
Physical activity has been shown to enhance circulating brain-derived neurotrophic factor (BDNF) in animals and humans. However, the exact time course and sex-specific modulation of peripheral BDNF in response to exercise are still poorly understood. We examined the kinetics of BDNF serum concentrations in response to perceived high-intensity and(More)
Environmentally caused changes in chromosomes that do not alter the DNA sequence but cause phenotypic changes by altering gene transcription are summarized as epigenetics. A major epigenetic mechanism is methylation or demethylation at CpG-rich DNA islands. DNA methylation triggered by drugs has largely unexplored therapeutic consequences. Here we report(More)
Pain is a major symptom in 70% of patients with advanced cancer. We analyzed data of 251 cancer patients (142 men and 109 women aged 29-89 years, Karnofsky status 10-90, 65.7+/-13.9) for association of a reduced-function haplotype in the GTP cyclohydrolase 1 (GCH1) gene with cancer pain therapy. The interval between cancer diagnosis and opioid therapy(More)
Activation of codeine by O-demethylation into morphine is a prerequisite for its analgesic effects and severe toxicity. Identifying patients in whom morphine is formed either at extremely low or at extremely high amounts may improve efficacy and safety of codeine therapy. To assess how well this identification is possible, we compared the performance of(More)
The human olfactory bulb displays high morphologic dynamics changing its volume with olfactory function, which has been explained by active neurogenetic processes. Discussion continues whether the human olfactory bulb hosts a continuous turnover of neurons. We analyzed the transcriptome via RNA quantification of adult human olfactory bulbs and intersected(More)
BACKGROUND Various effects on pain have been reported with respect to their statistical significance, but a standardized measure of effect size has been rarely added. Such a measure would ease comparison of the magnitude of the effects across studies, for example the effect of gender on heat pain with the effect of a genetic variant on pressure pain. (More)
BACKGROUND TRPA1 ion channels are involved in nociception and are also excited by pungent odorous substances. Based on reported associations of TRPA1 genetics with increased sensitivity to thermal pain stimuli, we therefore hypothesized that this association also exists for increased olfactory sensitivity. METHODS Olfactory function and nociception was(More)