Medical records of 158 patients with bipolar depression were analysed for the incidence of a switch from depression to maniform
states (mania and hypomania). Relation to psychopharmacological treatment was investigated. Thirty-nine (25%) patients of
the total sample had switched to a maniform state during the treatment period in the hospital. Among that group the phenomenon
occurred in 23 patients (15%) as a hypomania and in 16 patients (10%) as a mania. Patients with a switch were significantly
more often treated with tricyclic antidepressants (TCA) than patients without switch (79.5% vs 51.3%). Mood stabilising medication
might reduce the risk for switching, especially in patients treated with TCA; however, it seems not totally sufficient, since
59% of the switched patients received mood stabilisers. The switch phenomenon was not associated with sociodemographic or
clinical data.
Received: 23 September 1998 / Accepted: 28 September 1998 相似文献
In activated murine B lymphocytes, immunoglobulin class switch recombination occurs as a highly regulated process which is targeted to distinct switch regions. Here we present first evidence that in human B lymphocytes, switch recombination is targeted to distinct switch regions as well. In a panel of clonally unrelated IgG1-expressing human B cells, immortalized by Epstein-Barr virus (EBV) transformation, seven out of nine cells show switch recombination between Sμ and Sγ1 on both alleles, the active and inactive one. The remaining cells show no switch recombination on the inactive IgH locus. The very strong correlation of switch recombination on both alleles of IgG1-expressing cells proves that class switch recombination to IgG1 is not random but directed in human B lymphocytes. 相似文献
Molecular analysis of circular excision products and composite genomic switch regions has demonstrated that in mice, immunoglobulin (Ig) isotype switching from IgM to IgE often proceeds sequentially via IgG1. Based on analysis of Ig production in cell cultures, it has been suggested that human B cells may switch to IgE via IgG4, whereas limited molecular data from in vitro switched B cells suggest a direct IgM to IgE switch program. To obtain a quantitative assessment of direct versus sequential IgE switching in humans, we have analyzed the nucleotide sequences of 29 composite Sμ/S? switch regions from freshly isolated human B lymphocytes from patients with atopic dermatitis and from B lymphocytes induced to switch to IgE synthesis in vitro. The data show that in these B cells IgE isotype switching progressed directly from IgM to IgE. We conclude that, in contrast to the murine IgM/IgE switch program, the IgM to IgE switch in B lymphocytes from patients with atopic dermatitis as well as in vitro stimulated B cells from healthy donors preferentially proceeds via direct Sμ to S? switch recombination. 相似文献
The Japanese Respiratory Society 2017 guidelines strongly recommend switching from intravenous (IV) to oral antibiotics in patients with community-acquired pneumonia (CAP), following improvement in clinical symptoms and laboratory findings. Here, we retrospectively investigated the real-world, nationwide treatment and switching patterns for hospitalized patients with CAP in Japan using administrative data from 372 Japanese Diagnosis Procedure Combination hospitals from April 2010 to December 2018. Hospitalizations for CAP (patient age ≥20 years) with an A-DROP classification for CAP severity and IV antibiotics initiated on the admission date were included. Overall, 210,314 hospitalizations (moderate CAP: 61.7%) in 183,607 patients were analyzed. The median (interquartile range [IQR]) age at admission was 79 (70–86) years. Penicillin (51.9%) and cephalosporin (38.9%) were the most common IV antibiotic classes used and the median (IQR) duration of IV use was 8 (6–11) days. Switching to oral antibiotics during a hospitalization occurred in 30.1% (n = 63,311) of patients after a median (IQR) of 7 (5–10) days of IV treatment. The most frequently used oral antibiotic classes after a switch were fluoroquinolone (45.9%) and penicillin (24.8%). The switch rate was higher among hospitalizations with milder CAP, in respiratory medicine ward and in larger hospitals. The overall switch rates did not change over the study period. The findings from this analysis suggest that early switch from IV to oral antibiotics was not widely implemented during the 8 years of the study period. Further observation will be needed to see the potential impact of the guidelines update in 2017 in Japan. 相似文献
Introduction: Since 2006, biosimilars have been available in several countries worldwide, thus allowing for potential savings in pharmaceutical expenditure. However, there have been numerous debates about the interchangeability of biosimilars and reference products based on concerns of immunogenicity by switching between biological products, which may cause lack of effect and toxicity.
Areas covered: The authors provide the reader with an overview of the different positions of regulatory authorities on the interchangeability and automatic substitution of biosimilars and reference products. Presently, the FDA allows automatic substitution without prescriber intervention if the biosimilar is interchangeable with reference products, while the European Medicines Agency delegate to each single EU member state.
Expert opinion: Different approaches in defining interchangeability and automatic substitution call for harmonization to increase confidence of healthcare professionals and patients about the clinical impact of switching. Networks of electronic healthcare records and administrative databases, potentially linkable to clinical charts and registries may rapidly assess frequency and benefit-risk profile of different switching patterns in routine care at different levels, thus integrating and strengthening pre-marketing evidence. 相似文献
Activation-induced cytidine deaminase (AID) produces DNA breaks in immunoglobulin genes during antibody diversification. Double-stranded breaks (DSB) in the switch region mediate class switch recombination, and contribute to gene conversion and somatic hypermutation in the variable regions. However, the relative extent to which AID induces DSB in these regions or between these and other actively expressed sequences is unknown. Here, we exploited an enhancer-trap plasmid that identifies DSB in actively expressed loci to investigate the frequency and position of AID-induced vector integration events in mouse hybridoma cells. Compared to control cells, wild-type AID stimulates plasmid integration into the genome by as much as 29-fold. Southern and digestion-circularization PCR analysis revealed non-uniformity in the integration sites, with biases of 30- and 116-fold for the immunoglobulin kappa light chain and mu heavy chain genes, respectively. Further, within the immunoglobulin mu gene, 73% of vector integrations map to the mu switch region, an enhancement of five- and 12-fold compared to the adjacent heavy chain variable and mu gene constant regions, respectively. Thus, among potential highly transcribed genes in mouse hybridoma cells, the immunoglobulin heavy and light chain genes are important AID targets, with the immunoglobulin mu switch region being preferred compared to other genomic sites. 相似文献
Ultrasonic studies were performed on normal fetuses ranging from 36 to 40 weeks gestational age in an attempt to visualize anatomical details of the fetal heart. We were able to visualize cardiac structures hitherto thought to be unidentifiable. Two-dimensional B-scan exposures of sections showed transverse and longitudinal sections of the fetal heart, including the cardiac septa and inlet and outlet sites of the large vessels. To attempt to elucidate the dynamics of the fetal heart, the motility patterns of the cardiac structures were examined by time-motion mode scanning and the patterns obtained were compared to those observed in the postnatal heart. The reliability of the theories advanced and the further prospects are discussed. 相似文献