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1.
Addict Sci Clin Pract ; 19(1): 35, 2024 May 06.
Article in English | MEDLINE | ID: mdl-38711152

ABSTRACT

BACKGROUND: As the return to alcohol use in individuals with alcohol use disorder (AUD) is common during treatment and recovery, it is important that abstinence motivation is maintained after such critical incidences. Our study aims to explore how individuals with AUD participating in an app-based intervention with telephone coaching after inpatient treatment perceived their abstinence motivation after the return to alcohol use, whether their app use behavior was affected and to identify helpful factors to maintain abstinence motivation. METHODS: Using a mixed-methods approach, ten participants from the intervention group of the randomized controlled trial SmartAssistEntz who returned to alcohol use and recorded this in the app Appstinence, a smartphone application with telephone coaching designed for individuals with AUD, were interviewed about their experiences. The interviews were recorded, transcribed and coded using qualitative content analysis. App use behavior was additionally examined by using log data. RESULTS: Of the ten interviewees, seven reported their abstinence motivation increased after the return to alcohol use. Reasons included the reminder of negative consequences of drinking, the desire to regain control of their situation as well as the perceived support provided by the app. App data showed that app use remained stable after the return to alcohol use with an average of 58.70 days of active app use (SD = 25.96, Mdn = 58.50, range = 24-96, IQR = 44.25) after the return to alcohol use which was also indicated by the participants' reported use behavior. CONCLUSIONS: The findings of the study tentatively suggest that the app can provide support to individuals after the return to alcohol use to maintain and increase motivation after the incidence. Future research should (1) focus on specifically enhancing identification of high risk situations and reach during such critical incidences, (2) actively integrate the experience of the return to alcohol use into app-based interventions to better support individuals in achieving their personal AUD behavior change goals, and (3) investigate what type of support individuals might need who drop out of the study and intervention and discontinue app use altogether. TRIAL REGISTRATION: The primary evaluation study is registered in the German Clinical Trials Register (DRKS, registration number DRKS00017700) and received approval of the ethical committee of the Friedrich-Alexander University Erlangen-Nuremberg (193_19 B).


Subject(s)
Aftercare , Alcohol Abstinence , Alcoholism , Mobile Applications , Motivation , Humans , Female , Male , Alcoholism/therapy , Alcoholism/rehabilitation , Alcoholism/psychology , Adult , Middle Aged , Alcohol Abstinence/psychology , Aftercare/methods , Smartphone , Qualitative Research
2.
Rheumatol Int ; 43(7): 1363-1367, 2023 07.
Article in English | MEDLINE | ID: mdl-36988675

ABSTRACT

This study provides insight in behavior and perspective of rheumatic patients during the first COVID-19 wave. Especially, we analyzed the patients' fear of COVID-19 and unauthorized change of immunosuppressive medication in consequence of their fear. We hereby provide data from 877 patients with valuable insights into the patients' point of view. We retrospectively interviewed patients of our rheumatic university outpatient clinic. This way, we collected information about the patients' personal point of view. Data like the rheumatic diagnosis and immunosuppressive medication was extracted from the health records. Statistical analysis was conducted using IBM® SPSS® Statistics (version 26). A total of 877 patients were included into our study. We could show that fear of COVID-19 was clearly present in rheumatic patients. Higher fear levels seem to be associated with comorbidity burden. Unauthorized change of immunosuppressive medication was rare in our study (5%). In our study we provide novel insight into patients' point of view and behavior of rheumatic patients. Unauthorized change of immunosuppressive medication was rare (5%) as seen in other studies. The low rate of unauthorized change and high rate of compliance is reassuring since good disease control appears to be prognostically important in the progression of COVID-19 disease. Therefore, as the pandemic continues, treatment decisions should be made in close consultation between patient and practitioner to improve adherence and reduce morbidity and mortality.


Subject(s)
COVID-19 , Rheumatic Diseases , Humans , Immunosuppressive Agents/adverse effects , Cross-Sectional Studies , Pandemics , SARS-CoV-2 , Retrospective Studies , Rheumatic Diseases/drug therapy , Rheumatic Diseases/epidemiology
3.
Pediatr Rheumatol Online J ; 20(1): 121, 2022 Dec 27.
Article in English | MEDLINE | ID: mdl-36575486

ABSTRACT

BACKGROUND: A significant number of patients in pediatric rheumatology suffer from ongoing disease activity into adulthood and thus need to be transferred into adult care. Transition as a structured individual process of preparation and patient empowerment can reduce risks of adverse long-term outcomes. The aim of this study was to measure long-term transition outcomes such as health-related quality of life (HR-QoL), patient satisfaction, and continuity of care in former patients of the interdisciplinary Tuebingen Transition Program (TTP). METHODS: In an iterative team process, a standardized questionnaire was developed including the EQ-5D-5L to measure HR-QoL, visual analogue scales to measure various items of patient satisfaction, further questions on continuity of care and physical activity and physician global assessment (PGA) to determine disease activity. HR-QoL and physical activity were compared to data from the average German population. Data was analyzed descriptively, and a logistic regression analysis was performed to identify possible predictive factors for negative outcomes. RESULTS: Response rate was 28.8% (85/295), 70.6% were female and median age was 24.1 years. 70.6% were diagnosed with juvenile idiopathic arthritis (JIA). Overall, HR-QoL was high (79.8 on the EQ VAS), yet lower than in the average population. The study cohort was more physically active than the respective average age groups. Mean patient satisfaction with pediatric care (8.4; standard deviation (SD) 1.7) and with the transition program (7.9; SD 2.6) was higher than with adult care (7.7; SD 2.2). 76.5% of participants received regular rheumatologic care after transfer. After excluding all participants in remission, the drop-out rate was 4.7%. A low PGA at the time of transfer was associated with higher HR-QoL and patient satisfaction after transfer. CONCLUSIONS: HR-QoL of adult patients after successful transfer to adult rheumatology is reduced compared to the general population but physical activity and achievement of clinical remission could help to prevent negative long-term outcomes. Patient satisfaction and self-management of TTP patients were generally high, whereas youth-specific issues and their impact on the disease mandate greater attention. Treatment discontinuation rates were low and mostly due to remission. Further studies should focus on the identification of early predictors of long-term outcome to improve the process and outcome of transition.


Subject(s)
Arthritis, Juvenile , Rheumatology , Transition to Adult Care , Adult , Adolescent , Child , Humans , Female , Young Adult , Male , Quality of Life , Retrospective Studies , Arthritis, Juvenile/therapy
4.
J Clin Med ; 11(18)2022 Sep 13.
Article in English | MEDLINE | ID: mdl-36143006

ABSTRACT

Background: The purpose of this trial was to evaluate the effectiveness and safety of the IL-6 receptor antibody Tocilizumab (TCZ) in the treatment of Familial Mediterranean Fever (FMF). Methods: This was a randomized, double-blinded, placebo-controlled phase II trial in adult patients with active FMF and an inadequate response or intolerance to colchicine (crFMF). The physician's global assessment of disease activity (PGA), based on a five-point scale for six symptoms, was used as a clinical score, which had to be >2 at screening, together with elevated c-reactive protein (CRP) or erythrocyte sedimentation rate (ESR) and serum amyloid A (SAA) levels, to be eligible for inclusion. Patients were randomized 1:1 to either receive monthly TCZ or a placebo over a period of 24 weeks. The primary endpoint was the number of patients achieving an adequate response to treatment at week 16, defined as a PGA of ≤2 and normalized ESR or CRP and normalized SAA. Results: We randomized 25 patients with a median age of 31 years. At week 16, an adequate treatment response was achieved by two patients in the TCZ and none of the patients in the placebo arm (p = 0.089). SAA levels normalized with TCZ, but not with the placebo (p = 0.015). Conclusion: In this first randomized, placebo-controlled study in patients with active crFMF, more patients in the TCZ arm experienced a response to treatment in comparison to those receiving the placebo. As the prevention of amyloidosis is a major treatment goal in FMF, the normalization of SAA in TCZ-treated patients is essential. These findings have to be confirmed in a larger trial.

6.
Internet Interv ; 28: 100517, 2022 Apr.
Article in English | MEDLINE | ID: mdl-35251940

ABSTRACT

BACKGROUND: Alcohol use disorder, a prevalent and disabling mental health problem, is often characterized by a chronic disease course. While effective inpatient and aftercare treatment options exist, the transferal of treatment success into everyday life is challenging and many patients remain without further assistance. App-based interventions with human guidance have great potential to support individuals after inpatient treatment, yet evidence on their efficacy remains scarce. OBJECTIVES: To develop an app-based intervention with human guidance and evaluate its usability, efficacy, and cost-effectiveness. METHODS: Individuals with alcohol use disorder (DSM-5), aged 18 or higher, without history of schizophrenia, undergoing inpatient alcohol use disorder treatment (N = 356) were recruited in eight medical centres in Bavaria, Germany, between December 2019 and August 2021. Participants were randomized in a 1:1 ratio to either receive access to treatment as usual plus an app-based intervention with human guidance (intervention group) or access to treatment as usual plus app-based intervention after the active study phase (waitlist control/TAU group). Telephone-based assessments are conducted by diagnostic interviewers three and six weeks as well as three and six months after randomization. The primary outcome is the relapse risk during the six months after randomization assessed via the Timeline Follow-Back Interview. Secondary outcomes include intervention usage, uptake of aftercare treatments, AUD-related psychopathology, general psychopathology, and quality of life. DISCUSSION: This study will provide further insights into the use of app-based interventions with human guidance as maintenance treatment in individuals with AUD. If shown to be efficacious, the intervention may improve AUD treatment by assisting individuals in maintaining inpatient treatment success after returning into their home setting. Due to the ubiquitous use of smartphones, the intervention has the potential to become part of routine AUD care in Germany and countries with similar healthcare systems.

7.
Subst Use Misuse ; 57(4): 649-655, 2022.
Article in English | MEDLINE | ID: mdl-35142599

ABSTRACT

There is evidence that craving mediates the relationship between Impulsive Personality Traits (IPTs) and relapse during the treatment of an Alcohol Use Disorder (AUD). To provide tailored interventions, a deeper understanding of the relation between IPTs and craving, namely mediating processes, is important. Based on previous literature, we proposed that lower emotion regulation competencies mediate the relation between attentional as well as non-planning IPTs and craving. To investigate these interrelations, we used data from the baseline assessment (n = 320) of the SmartAssistEntz project (pre-registered in the German Clinical Trials Register [DRKS00017700]). Inpatients with a primary AUD diagnosis were interviewed using standardized self-report measures (IPTs: BIS-15, emotion regulation competencies: ERSQ, craving: OCDS-G short version) during their withdrawal treatment. Indirect effects were calculated using the SPSS macro PROCESS v3.5. Attentional as well as non-planning, but not motor, IPTs were associated with craving. Emotion regulation competencies mediated the relationship between attentional as well as non-planning IPTs and craving. Given their mediating role in the present study, it is interesting to investigate if addressing emotion regulation competencies can mitigate the negative influences of attentional and non-planning IPTs. The direct effect of attentional IPTs implicates alternate mediating processes, which should also be investigated in future research.


Subject(s)
Alcoholism , Emotional Regulation , Substance Withdrawal Syndrome , Alcoholism/psychology , Alcoholism/therapy , Craving , Humans , Impulsive Behavior
8.
J Clin Psychol ; 78(7): 1451-1462, 2022 07.
Article in English | MEDLINE | ID: mdl-35045188

ABSTRACT

OBJECTIVES: Impulsivity is related to a higher risk of relapse in alcohol use disorders. However, besides drinking behavior, other recovery outcomes like physical and mental health-related quality of life are at least as important. The present study aimed to fill a research gap regarding the association of different impulsivity facets with health-related quality of life and well-being in alcohol use disorder. METHODS: Individuals with a primary alcohol use disorder diagnosis (n = 167) were interviewed with standardized self-report measures at the progressed stage of their withdrawal treatment and 6 weeks thereafter. Multiple regression models were calculated to examine the association of impulsivity, craving, and drinking patterns with health-related quality of life and well-being 6 weeks after withdrawal treatment, as well as the predictive role of impulsivity assessed during withdrawal for these two outcomes. RESULTS: Craving was associated with health-related quality of life and well-being 6 weeks after withdrawal. Likewise, non-planning and attentional impulsivity were associated with well-being 6 weeks after withdrawal. Motor impulsivity during withdrawal treatment predicted health-related quality of life 6 weeks thereafter. CONCLUSION: Impulsivity seems to be negatively related to health-related quality of life and well-being in the first weeks after alcohol withdrawal treatment, probably to a higher extent than drinking patterns, but differentiating between its facets seems to be important. These findings emphasize the importance of treatment approaches aiming at reduced impulsivity in the early recovery process.


Subject(s)
Alcoholism , Substance Withdrawal Syndrome , Alcohol Drinking , Alcoholism/therapy , Humans , Impulsive Behavior , Quality of Life
9.
Wien Med Wochenschr ; 172(15-16): 379-382, 2022 Nov.
Article in English | MEDLINE | ID: mdl-34731365

ABSTRACT

We here report on a 60-year-old woman with familial Mediterranean fever (FMF) who developed cognitive impairment 16 years after initial diagnosis. On MRI, a new extensive white matter lesion in the right frontal lobe with mild local mass effect but without contrast enhancement was detectable and classified as a tumefactive lesion. Additional MR spectroscopy showed markedly increased choline levels accompanied by a significant lactate peak, highly suggestive of a low-florid demyelinating process. Although diffuse central nervous system (CNS) lesions have been described in single FMF cases, tumefactive lesions have not been observed in FMF patients without concomitant multiple sclerosis. In summary, this case highlights rare differential diagnoses of atypical, inflammatory CNS lesions and the clinical utility of MR spectroscopy.


Subject(s)
Familial Mediterranean Fever , Multiple Sclerosis , Female , Humans , Middle Aged , Familial Mediterranean Fever/diagnosis , Familial Mediterranean Fever/complications , Multiple Sclerosis/diagnosis , Multiple Sclerosis/complications , Multiple Sclerosis/pathology , Magnetic Resonance Spectroscopy/methods , Magnetic Resonance Imaging/methods , Lactic Acid , Choline
10.
Rheumatol Int ; 42(1): 121-126, 2022 01.
Article in English | MEDLINE | ID: mdl-34581839

ABSTRACT

Behçet's disease (BD) can affect the genital system and is more common in Middle Eastern countries and Asia but also occurs in Caucasian people. Aim of this study was to evaluate the prevalence of sexual dysfunction (SD) and depression in patients with BD compared to a healthy control group (HCG). In addition, differences with regard to depression and patients' origin were evaluated. This prospective, monocentric study included 106 consecutive patients from our specialized BD outpatient clinic. Patients were asked to fill out the paper based standardized and validated questionnaires International Index of Erectile Function (IIEF), the Female Sexual Function Index (FSFI) and the Beck Depression Inventory (BDI). In addition, 206 healthy controls were asked to fill out the questionnaires. 106 patients with BD were evaluated and 206 participants in the HCG. The mean age in BD group was 40.5 years as compared to 44.4 years in the HCG. Half of the patients had Middle Eastern and half Caucasian origin. SD was found in 24.5% of all subjects. Only 6.9% of male patients showed signs of SD, while half of the women's group was suffering from SD. The prevalence for SD was significantly higher in women with Middle Eastern ethnic origin compared to women with Caucasian origin (75 vs. 33.3%, p = 0.024). Erectile Dysfunction occurred in 55% of all male patients which was not statistical different from the HCG. Genital ulcers affected 73.6% of all patients. Depression was found in 36.7% of all subjects as compared to 6.25% in the HCG (p < 0.001). Both, SD and depression correlated positively in males (p = 0.017) and females (p = 0.013). SD and depression are very common problems in BD and should be addressed by the treating physician. Both manifestations are intensifying each other. Depression especially is more prevalent compared to the healthy population.


Subject(s)
Behcet Syndrome/epidemiology , Depression/epidemiology , Sexual Dysfunction, Physiological/epidemiology , Adult , Behcet Syndrome/physiopathology , Case-Control Studies , Female , Humans , Male , Prospective Studies , Sexual Dysfunction, Physiological/etiology , Surveys and Questionnaires
11.
Clin Exp Rheumatol ; 39 Suppl 131(4): 52-56, 2021.
Article in English | MEDLINE | ID: mdl-34251327

ABSTRACT

OBJECTIVES: Women are more frequently affected by connective tissue diseases like systemic sclerosis (SSc). Therefore, few studies exist on male-specific complaints. This study aimed to investigate the prevalence and associated factors of erectile dysfunction (ED) in SSc compared with other connective tissue diseases (CTD) and healthy controls. METHODS: 64 patients were analysed and compared with 123 age-matched HC. The 15-item International Index for Erectile Function (IIEF) questionnaire was used to assess sexual function. The prevalence of depression was quantified by using the validated Beck Depression Inventory (BDI). RESULTS: Mean age was 52.3 years (SD 10.75) for SSc, 52.9 years (SD 11.01) for patients with other CTD and 52.6 (SD 12.37) for HC. Mean IIEF-15 score was 13.6 for SSc, 11.7 for other CTD and 23.6 for HC. ED was significantly more frequent in patients with SSc (55.0%) and other CTD (54.4%) than in HC (12.7%) (p<0.001) and correlated with diseases severity. The mean BDI score was 10.8 for SSc/CTD and 5.4 for HC (p<0.001). With 36.6%, SSc patients suffered more often from a depression than patients with other CTD (17.4%) and HC (6.3%). We found a significant correlation between the IIEF-15 and depression classified by BDI (r= -0.527; p<0.001). CONCLUSIONS: This is the first study to show increased prevalence of ED, especially severe ED, in men with SSc compared to other CTD and age-matched HC. Physicians should be aware of this influence on sexual health and its correlation to depression and disease severity.


Subject(s)
Erectile Dysfunction , Scleroderma, Systemic , Erectile Dysfunction/diagnosis , Erectile Dysfunction/epidemiology , Healthy Volunteers , Humans , Male , Middle Aged , Prevalence , Scleroderma, Systemic/diagnosis , Scleroderma, Systemic/epidemiology , Surveys and Questionnaires
12.
Curr Rheumatol Rep ; 23(9): 72, 2021 07 14.
Article in English | MEDLINE | ID: mdl-34259944

ABSTRACT

PURPOSE OF THE REVIEW: Elevated levels of anti-phospholipid (aPL) antibodies are the most important criterion in the diagnosis of anti-phospholipid syndrome (APS) and are usually responsible for promoting the risk of thrombotic complications. Now, in the course of the global coronavirus disease 2019 (COVID-19) pandemic, measurable aPL antibodies have also been detected in a noticeable number of patients showing a variety ranging from studies with only isolated positive tests to cohorts with very high positivity. Thus, the question arises as to whether these two different clinical pictures may be linked. RECENT FINDINGS: The ambivalent results showed a frequent occurrence of the investigated aPL antibodies in COVID-19 patients to an individually varying degree. While some question a substantial correlation according to their results, a number of studies raise questions about the significance of a correlation of aPL antibodies in COVID-19 patients. Within the scope of this review, these have now been described and compared with each other. Ultimately, it is necessary to conduct further studies that specifically test aPL antibodies in a larger context in order to make subsequent important statements about the role of APS in COVID-19 and to further strengthen the significance of the described comparisons.


Subject(s)
Antibodies, Antiphospholipid/immunology , COVID-19/immunology , Antibodies, Anticardiolipin/immunology , Humans , Immunoglobulin G/immunology , Immunoglobulin M/immunology , Lupus Coagulation Inhibitor/immunology , SARS-CoV-2 , beta 2-Glycoprotein I/immunology
14.
J Cell Mol Med ; 24(21): 12491-12503, 2020 11.
Article in English | MEDLINE | ID: mdl-32954656

ABSTRACT

Thrombocyte formation from megakaryocyte and their progenitor cells is tightly regulated by thrombopoietin (TPO) and its receptor c-MPL, thereby maintaining physiological functionality and numbers of circulating platelets. In patients, dysfunction of this regulation could cause thrombocytopenia or myeloproliferative syndromes. Since regulation of this pathway is still not completely understood, we investigated the role of the ubiquitin ligase c-Cbl which was previously shown to negatively regulated c-MPL signalling. We developed a new conditional mouse model using c-Cblfl/fl Pf4Cre mice and demonstrated that platelet-specific knockout of c-Cbl led to severe microthrombocytosis and impaired uptake of TPO and c-MPL receptor internalization. Furthermore, we characterized a constitutive STAT5 activation c-Cbl KO platelets. This study identified c-Cbl as a potential player in causing megakaryocytic and thrombocytic disorders.


Subject(s)
Endocytosis , Proto-Oncogene Proteins c-cbl/metabolism , Receptors, Thrombopoietin/metabolism , Animals , Integrases/metabolism , Lymphocytosis , Megakaryocytes/metabolism , Mice, Inbred C57BL , Mice, Knockout , Protein Transport , Signal Transduction , Thrombocytosis , Thrombopoiesis , Thrombopoietin/metabolism
15.
Clin Exp Rheumatol ; 38 Suppl 125(3): 59-64, 2020.
Article in English | MEDLINE | ID: mdl-32301433

ABSTRACT

OBJECTIVES: To assess and compare sexual dysfunction (SDF) in female patients with systemic sclerosis (SSc) or systemic lupus erythematosus (SLE), to correlate sexual function with disease characteristics and depression, and to evaluate a short questionnaire (Qualisex) as a screening test. METHODS: Female patients with systemic sclerosis or systemic lupus erythematosus in two German tertiary university hospitals were evaluated in a prospective study. A self-designed questionnaire, the Female Sexual Function Index (FSFI), the Qualisex, and the Beck's depression inventory were used. RESULTS: 171 female patients were included into the study (83 with SSc, and 88 with SLE). 62.6% (52 of 83) of SSc patients and 67.0% (59 of 88) of SLE patients were sexually active. Only 9.6% of SSc patients and 14.8% of SLE patients had ever discussed sexual problems with their physician. Significantly more SSc patients would wish to discuss sexuality with their physician more intensively (37.3% vs. 28.4% in SLE patients, p=0.011). Among the 51 sexually active and evaluable SSc patients a mean FSFI of 25.53 (±5.06) was found, with a FSFI value defining sexual dysfunction (SDF) (<26.55) in 49% of patients, which did not differ significantly compared to SLE patients (n=59, mean FSFI 26.92 (±5.17), SDF in 45.8%). The Qualisex correlated significantly with the FSFI, and both Qualisex and FSFI correlated with depressiveness. CONCLUSIONS: Sexual dysfunction (SDF) is a frequent problem in female patients with SSc and SLE. Addressing sexual issues during medical consultation is an unmet need. The Qualisex constitutes a short questionnaire, which is suitable for addressing concerns on sexuality.


Subject(s)
Lupus Erythematosus, Systemic , Scleroderma, Systemic , Female , Humans , Prospective Studies , Sexual Behavior , Surveys and Questionnaires
16.
Eur J Contracept Reprod Health Care ; 25(1): 72-75, 2020 Feb.
Article in English | MEDLINE | ID: mdl-31852274

ABSTRACT

Objective: The aim of the study was to investigate the relationship between premature ovarian failure and autoimmune disease.Methods: This interdisciplinary prospective study included 52 consecutively recruited women with premature ovarian failure, aged 18-40 years. Diagnosis of premature ovarian failure was defined as amenorrhoea lasting more than 4 months and anti-Müllerian hormone levels below the age-appropriate range. Women with an abnormal karyotype or Fragile X syndrome were excluded from the study. All participants were screened by a rheumatologist for the presence of underlying autoimmune disease.Results: The average age at first diagnosis of premature ovarian failure was 29.5 years; 92.3% of participants (n = 48) presented with a secondary amenorrhoea, while only 7.7% (n = 4) had primary amenorrhoea. Of all 52 participants, 40.4% (n = 21) had at least one confirmed autoimmune disease, including Hashimoto's disease, systemic lupus erythematosus, rheumatoid arthritis, psoriasis, Crohn's disease, polyglandular autoimmune syndrome and coeliac disease. Response rates for hormonal stimulation therapy were low and the presence of autoimmune disease was associated with poor infertility treatment outcome.Conclusions: We found a high prevalence of autoimmune disease in women with premature ovarian failure. Screening for autoimmune diseases should be offered to all women with premature ovarian failure.


Subject(s)
Autoimmune Diseases/epidemiology , Primary Ovarian Insufficiency/immunology , Adolescent , Adult , Autoimmune Diseases/complications , Female , Humans , Prevalence , Prospective Studies , Young Adult
17.
Soc Cogn Affect Neurosci ; 14(9): 1017-1025, 2019 09 30.
Article in English | MEDLINE | ID: mdl-31680173

ABSTRACT

In-ethnicity bias, as one of the in-group biases, is widespread in different cultures, interfering with cross-ethnicity communication. Recent studies have revealed that an in-ethnicity bias can be reduced by an in-team bias caused by the membership in a mixed-ethnicity team. However, the neural correlates of different in-group biases are still not clear, especially regarding possible cultural differences. A total of 44 participants (20 Chinese and 24 Germans) were recruited and completed a social categorization fMRI-task, categorizing faces according to their ethnicity and a learned team membership. Our behavioral results revealed both in-ethnicity and in-team bias in German participants, but not in Chinese participants. Our imaging results, however, showed both biases across all participants, as reflected in increased dorsal medial frontal cortex (MFC) activation for in-ethnicity, as well as in-team categorizations, while activation in ventral MFC was higher for in-ethnicity faces in Chinese participants than in the German participants. Our results highlight the importance of the dorsal MFC for in-group categorization across cultures and suggest that cultures might modulate in-group biases.


Subject(s)
Ethnicity/psychology , Facial Recognition/physiology , Recognition, Psychology/physiology , Adult , Asian People , Bias , Face , Female , Group Processes , Humans , Magnetic Resonance Imaging , Male , Racial Groups , Young Adult
18.
Nat Commun ; 8(1): 755, 2017 10 02.
Article in English | MEDLINE | ID: mdl-28970470

ABSTRACT

Chronic lymphocytic leukaemia (CLL) is a clonal disorder of mature B cells. Most patients are characterised by an indolent disease course and an anergic phenotype of their leukaemia cells, which refers to a state of unresponsiveness to B cell receptor stimulation. Up to 10% of CLL patients transform from an indolent subtype to an aggressive form of B cell lymphoma over time (Richter´s syndrome) and show a significantly worse treatment outcome. Here we show that B cell-specific ablation of Nfat2 leads to the loss of the anergic phenotype culminating in a significantly compromised life expectancy and transformation to aggressive disease. We further define a gene expression signature of anergic CLL cells consisting of several NFAT2-dependent genes including Cbl-b, Grail, Egr2 and Lck. In summary, this study identifies NFAT2 as a crucial regulator of the anergic phenotype in CLL.NFAT2 is a transcription factor that has been linked with chronic lymphocytic leukaemia (CLL), but its functions in CLL manifestation are still unclear. Here the authors show, by analysing mouse CLL models and characterising biopsies from CLL patients, that NFAT2 is an important regulator for the anergic phenotype of CLL.


Subject(s)
Clonal Anergy/genetics , Leukemia, Lymphocytic, Chronic, B-Cell/genetics , NFATC Transcription Factors/genetics , Adaptor Proteins, Signal Transducing , Animals , Early Growth Response Protein 2 , Gene Expression Regulation, Neoplastic , Humans , Lymphocyte Specific Protein Tyrosine Kinase p56(lck) , Mice , Phenotype , Proto-Oncogene Proteins c-cbl , Ubiquitin-Protein Ligases
19.
Exp Hematol ; 42(6): 477-86.e4, 2014 Jun.
Article in English | MEDLINE | ID: mdl-24607955

ABSTRACT

Thrombopoietin (TPO) is the primary regulator of platelet production, affecting cell survival, proliferation, and differentiation through binding to and stimulation of the cell surface receptor the cellular myeloproliferative leukemia virus oncogene (c-Mpl). Activating mutations in c-Mpl constitutively stimulate downstream signaling pathways, leading to aberrant hematopoiesis, and contribute to development of myeloproliferative neoplasms. Several studies have mapped the tyrosine residues within the cytoplasmic domain of c-Mpl that mediate these cellular signals; however, secondary signaling pathways are incompletely understood. In this study, we focused on c-Mpl tyrosine 591 (Y591). We found Y591 of wild-type c-Mpl to be phosphorylated in the presence of TPO. Additionally, eliminating Y591 phosphorylation by mutation to Phe resulted in decreased total receptor phosphorylation. Using a Src homology 2/phosphotyrosine-binding (SH2/PTB) domain binding microarray, we identified novel c-Mpl binding partners for phosphorylated Y591, including Src homology region 2 domain-containing phosphatase-1 (SHP-1), spleen tyrosine kinase (SYK) and Bruton's tyrosine kinase (BTK). The functional significance of binding partners was determined through small interfering RNA treatment of Ba/F3-Mpl cells, confirming that the increase in pERK1/2 resulting from removal of Y591 may be mediated by spleen tyrosine kinase. These findings identify a novel negative regulatory pathway that controls TPO-mediated signaling, advancing our understanding of the mechanisms required for successful maintenance of hematopoietic stem cells and megakaryocyte development.


Subject(s)
Receptors, Thrombopoietin/metabolism , Signal Transduction/genetics , Thrombopoietin/physiology , Tyrosine/metabolism , Amino Acid Sequence , Blotting, Western , Cell Line , Extracellular Signal-Regulated MAP Kinases/metabolism , Humans , Molecular Sequence Data , Phosphorylation , Receptors, Thrombopoietin/genetics
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