Sexual differences and the composition/function of the gut microbiome are not considered the most important players in the drug metabolism field; however, from the recent data it is obvious that they may significantly affect the response of the patient to therapy. Here, we evaluated the effect of microbial colonization and sex differences on mRNA expression and the enzymatic activity of hepatic cytochromes P450 (CYPs) in germ-free (GF) mice, lacking the intestinal flora, and control specific-pathogen-free (SPF) mice. We observed a significant increase in the expression of Cyp3a11 in female SPF mice compared to the male group. However, the sex differences were erased in GF mice, and the expression of Cyp3a11 was about the same in both sexes. We have also found higher Cyp2c38 gene expression in female mice compared to male mice in both the SPF and GF groups. Moreover, these changes were confirmed at the level of enzymatic activity, where the female mice exhibit higher levels of functional CYP2C than males in both groups. Interestingly, we observed the same trend as with CYP3A enzymes: a diminished difference between the sexes in GF mice. The presented data indicate that the mouse gut microbiome plays an important role in sustaining sexual dimorphism in terms of hepatic gene expression and metabolism.

The British Journal of Haematology publishes original research papers in clinical, laboratory and experimental haematology. The Journal also features annotations, reviews, short reports, images in haematology and Letters to the Editor.

Background: Dementia is a serious problem in old age, that impacts an individual’s ability to function and may threaten personal dignity. Given the variable features of the illness and the diversity of life experiences, many factors may contribute to the perception of dignity by men and women with dementia. The purpose of the study was to explore the factors that contribute to dignity and its domains in men and women with dementia. Methods: This cross-sectional study involved 316 community-dwelling patients with early-stage dementia (aged ≥ 60) (PwD). We assessed the participants’ sociodemographic and social involvement characteristics, health-related variables (pain, depression, physical performance, visual and hearing impairments), attitude to aging, and self-sufficiency in the activities of daily living (ADL). These factors were investigated as independent variables for the perception of dignity and of its domains in men and women. Results: Multivariate regression analysis showed that PwD experienced minor dignity problems in the early stages of dementia. In both men and women higher rates of depression, negative attitudes to aging, and pain were associated with reductions in the perception of dignity. In men, but not in women visual impairment had a negative effect on overall dignity, and on the associated domains of ‘Loss of Autonomy’ and ‘Loss of Confidence’. In women, lowered self-sufficiency in ADL contributed to reduced self-perception of dignity and in the associated domains of ‘Loss of Purpose of Life’, ‘Loss of Autonomy’, and ‘Loss of Confidence’. Sociodemographic and social involvement characteristics, hearing impairment, and physical performance did not influence the participants’ self-perception of dignity. Conclusion: The results suggested that several common factors (depression, attitudes to aging, and pain) contribute to the perception of dignity in both men and women. Other factors, visual impairments in men, and self-sufficiency in ADL in women, appear to be more gender specific. These differences might relate to their specific gender roles and experiences. The self-perception of dignity in PwD can be helped by supporting the individual, to the extent that their illness allows, in maintaining activities that are important to their gender roles, and that preserve their gender identity. Trial registration: NCT04443621.

(1) Background: The aim of this study was to compare the cytotoxicity of selected resin-modified materials used in direct contact with the dental pulp (TheraCal LC, TheraCal PT, and ApaCal ART) with calcium silicate cement (Biodentine). (2) Methods: The mouse fibroblast Balb/3T3 cell line and the extracts of tested materials in four concentrations were used for the testing. An MTT assay was performed in three independent experiments with six replicates for each concentration of tested material. The cell viability (%) and cytotoxicity were expressed (cytotoxic effect is considered in cases where the cell viability is lower than 70%). The mean of the cell viability and the standard deviation were expressed for each material at all concentrations. ANOVA and Dunnet’s post hoc tests were used for the statistical analysis. All of these tests were performed at the 0.05 significance level. (3) Results: At all concentrations, the cell viability was statistically significantly lower (p ≤ 0.002) for all tested materials compared to Biodentine. ApaCal ART showed a high level of cytotoxicity at all concentrations (cell viability lower than 47.71%, p < 0.0001). The same result was found for TheraCal LC at concentrations of 100%, 50% and 25% and TheraCal PT at concentrations of 100% and 50%. TheraCal LC at a 10% concentration (cell viability 68.18%) and TheraCal PT at a 25% concentration (cell viability 60.63%) indicated potential cytotoxicity. TheraCal PT at a 10% concentration was not found to be cytotoxic (cell viability 79.18%, p = 0.095). (4) Conclusion: The resin-modified calcium silicate and calcium phosphate materials showed higher cytotoxic potential, so they should be used with caution when in direct contact with the dental pulp.

The importance of serum levels of selected biological parameters in the diagnosis, staging and prognosis of multiple myeloma