Human mesenchymal stem cells (hMSC) are frequently used in tissue engineering. Due to their strong tumor tropism, hMSC seem to be a promising vehicle for anticancer drugs. However, interactions between hMSC and cancer are ambiguous. Particularly the cytokines and growth factors seem to play an important role in cancer progression and metastasis. The present study evaluated the effects of hMSC on head and neck squamous cell carcinoma (HNSCC) cell lines (FaDu and HLaC78) in vitro. hMSC released several cytokines and growth factors. FaDu and HLaC78 showed a significant enhancement of cell proliferation after cultivation with hMSC-conditioned medium as compared to control. This proliferation improvement was inhibited by the addition of anti-IL-6. The western blot showed an activation of Erk1/2 in FaDu and HLaC78 by hMSC-conditioned medium. HNSCC cell lines expressed EGFR. The current study confirms the importance of cytokines secreted by hMSC in cancer biology. Especially IL-6 seems to play a key role in cancer progression. Thus, the use of hMSC as a carrier for cancer therapy must be discussed critically. Future studies should evaluate the possibility of generating genetically engineered hMSC with, for example, the absence of IL-6 secretion.

Background The onset of mental illness such as depression and anxiety disorders in pregnancy and postpartum period is common. The coronavirus induced disease 2019 (COVID-19) pandemic and the resulting public policy responses represent an exceptional situation worldwide and there are hints for adverse psychosocial impact, hence, the study of psychological effects of the pandemic in women during hospitalization for delivery and in the postpartum period is highly relevant. Methods Patients who gave birth during the first wave of the COVID-19 pandemic in Germany (March to June 2020) at the Department of Obstetrics and Gynecology, University of Würzburg, Germany, were recruited at hospital admission for delivery. Biosamples were collected for analysis of SARS-CoV-2 infection and various stress hormones and interleukin-6 (IL-6). In addition to sociodemographic and medical obstetric data, survey questionnaires in relation to concerns about and fear of COVID-19, depression, stress, anxiety, loneliness, maternal self-efficacy and the mother–child bonding were administered at T1 (delivery stay) and T2 (3–6 months postpartum). Results In total, all 94 recruited patients had a moderate concern of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) at T1 with a significant rise at T2. This concern correlated with low to low-medium general psychosocial stress levels and stress symptoms, and the women showed a significant increase of active coping from T1 to T2. Anxiety levels were low and the Edinburgh Postnatal Depression Scale showed a medium score of 5 with a significant (T1), but only week correlation with the concerns about SARS-CoV-2. In contrast to the overall good maternal bonding without correlation to SARS-CoV-2 concern, the maternal self-efficiency correlated negatively with the obstetric impairment caused by the COVID-19 pandemic. Conclusion Obstetric patients` concerns regarding SARS-CoV-2 and the accompanying pandemic increased during the course of the pandemic correlating positively with stress and depression. Of note is the increase in active coping over time and the overall good mother–child-bonding. Maternal self-efficacy was affected in part by the restrictions of the pandemic. Clinical trial registration DRKS00022506

Human mesenchymal stem cells (hMSC) are multipotent cells with the ability to differentiate into a range of different cell types, including fat, bone, cartilage or muscle. A pro-tumorigenic effect of hMSC has been previously reported as part of the tumor stroma. In addition, studies have previously revealed the influence of hematopoietic and lymphoid tumors on hMSC differentiation to support their own growth. However, this possible phenomenon has not been explored in solid malignancies. Therefore, the aim of the present study was to investigate the effects of head and neck squamous cell carcinoma (HNSCC) lines Cal27 and HLaC78 on the induction of osteogenic and adipogenic differentiation in hMSCs. Native hMSCs were co-cultured with Cal27 and HLaC78 cells for 3 weeks. Subsequently, hMSC differentiation was assessed using reverse transcription-PCR and using Oil Red O and von Kossa staining. Furthermore, the effects of differentiated hMSCs on Cal27 and HLaC78 were examined. For this purpose, hMSCs differentiated into the adipogenic (adipo-hMSC) and osteogenic (osteo-hMSC) lineages were co-cultured with Cal27 and HLaC78. Cell viability, cytokine secretion and activation of STAT3 signaling were measured by cell counting, dot blot assay (42 cytokines with focus on IL-6) and western blotting (STAT3, phosphorylated STAT3, β-actin), respectively. Co-culturing hMSCs with Cal27 and HLaC78 cells resulted in both adipogenic and osteogenic differentiation. In addition, the viability of Cal27 and HLaC78 cells was found to be increased after co-cultivation with adipo-hMSCs, compared with that of cells co-cultured with osteo-hMSC. According to western blotting results, Cal27 cells incubated with adipo-hMSCs exhibited increased STAT3 activation, compared with that in cells co-cultured with native hMSCs and osteo-hMSCs. IL-6 concentration in the media of Cal27 and HLaC78 after co-cultivation with respectively incubation with conditioned media of hMSCs, adipo-hMSCs and osteo-hMSCs were also found to be increased compared with that in the media of Cal27 and HLaC78 cells incubated with DMEM. To conclude, HNSCC cell lines Cal27 and HLaC78 induced hMSC differentiation towards the adipogenic and osteogenic lineages in vitro. Furthermore, a proliferative effect of adipo-hMSCs on Cal27 and HLaC78 cells was revealed with STAT3 activation as a possible mechanism. These results warrant further investigation of the interaction between HNSCC cells and hMSCs, with focus on the mechanism underlying the differentiation of hMSCs.

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BackgroundThe onset of mental illness such as depression and anxiety disorders in pregnancy and postpartum period is common. The coronavirus induced disease 2019 (COVID-19) pandemic and the resulting public policy responses represent an exceptional situation worldwide and there are hints for adverse psychosocial impact, hence, the study of psychological effects of the pandemic in women during hospitalization for delivery and in the postpartum period is highly relevant. MethodsPatients who gave birth during the first wave of the Corona pandemic in Germany (March to June 2020) at the Department of Obstetrics and Gynecology, University of Würzburg, Germany, were recruited at hospital admission for delivery. Biosamples were collected for analysis of SARS-CoV-2 infection and various stress hormones and interleukin-6 (IL-6). In addition to sociodemographic and medical obstetric data, survey questionnaires in relation to concerns about and fear of COVID-19, depression, stress, anxiety, loneliness, maternal self-efficacy and the mother-child bonding were administered at T1 (delivery stay) and T2 (3-6 month postpartum).ResultsIn total, all 94 recruited patients had a moderate concern of severe acute respiratory syndrome coronavirus 2 (SARS-CoV2) at T1 with a significant rise at T2. This concern correlated with low to low-medium general psychosocial stress levels and stress symptoms, and the women showed a significant increase of active coping from T1 to T2. Anxiety levels were low and the Edinburgh Postnatal Depression Scale showed a medium score of 5 with a significant (T1), but only week correlation with the concerns about SARS-CoV-2. In contrast to the overall good maternal bonding without correlation to SARS-CoV-2 concern, the maternal self-efficiency correlated negatively with the obstetric impairment caused by the COVID-19 pandemic. ConclusionObstetrical patients` concerns regarding SARS-CoV-2 and the accompanying pandemic increased during the course of the pandemic correlating positively with stress and depression. Of note is the increase in active coping over time and the overall good mother-child-bonding. Maternal self-efficacy was affected in part by the restrictions of the pandemic.Clinical trial registration: DRKS00022506