Disclosing Child Sexual Abuse to a Health Professional: A Metasynthesis.

Objective: Sexual abuse is a major public health problem. Its disclosure to a health professional could help to reduce its impact on survivors' lives. The objective of this metasynthesis, combining a systematic review and an analysis of the qualitative studies, was to explore the qualitative literature concerning the experience of a survivor disclosing sexual violence experienced in childhood to a health professional, from the perspective of both. Methods and Data Sources: We used four databases and two journals (Medline, PsycINFO, EMBASE, and SSCI, and the Journal of Sexual Abuse and Child Abuse and Neglect) to identify studies concerning this disclosure of sexual abuse to healthcare professionals from the point of view of the survivors and the health professionals. After assessing the methodological quality of the articles with the "Critical Appraisal Skills Program (CASP)," we conducted a thematic analysis of the data extracted during the review. Results: This review includes 20 articles, covering the data of 612 participants: 291 who were adults at the time of the study but abused in childhood, 152 minors, 14 parents of adolescents, and 155 healthcare professionals. Two themes emerged from the analysis: (1) the disclosure as experienced by the professionals, and (2) the disclosure as experienced by the survivors. Conclusion: Our results show that survivors had a diachronic approach to the experience of disclosure. They suggest a change over time in how survivors experience disclosure: relief and release were seen only among the adult participants, at a distance from - long after - the disclosure. This study made it possible to identify new perspectives for research in the field of child psychiatry and to formulate concrete clinical proposals, in particular, by applying the principle of patient experts to involve now-adult survivors in training and increase the awareness of the healthcare professionals concerned.

Obstacles and facilitators of therapeutic alliance among adolescents with anorexia nervosa, their parents and their psychiatrists: A qualitative study.

BACKGROUND: Therapeutic alliance is one of the most important aspects of treatment of adolescents with anorexia nervosa. Little is known about the facilitators and obstacles of its process in this situation. We aimed to explore the experience of therapeutic alliance in inpatient treatment among adolescents with anorexia nervosa, their parents and their psychiatrists. METHODS: This qualitative study, using semi-structured interviews, took place in France. Data collection by purposive sampling continued until we reached theoretical sufficiency. Data analysis was thematic. RESULTS: Forty-one participants were included, 15 teenaged girls, 18 parents and 8 psychiatrists. Analysis showed two themes: (1) what facilitates an alliance in treatment - with four facilitators: (a) human qualities, (b) an active role in the treatment, (c) taking time and (d) taking care of the entire family and (2) what impedes an alliance in treatment with four obstacles: (a) being too close or too distant, (b) focusing on weight, (c) control and constraints and (d) psychiatrization. CONCLUSION: Collaborative work between paediatricians and psychiatrists could facilitate therapeutic alliance with parents. Definition of therapeutic alliance in this situation should be enlarged to include the adolescent-parent relationship. It is necessary to construct specific items to integrate these specific aspects to existing scales.

Glutathione peroxidase 3, a new retinoid target gene, is crucial for human skeletal muscle precursor cell survival.

Protection of satellite cells from cytotoxic damages is crucial to ensure efficient adult skeletal muscle regeneration and to improve therapeutic efficacy of cell transplantation in degenerative skeletal muscle diseases. It is therefore important to identify and characterize molecules and their target genes that control the viability of muscle stem cells. Recently, we demonstrated that high aldehyde dehydrogenase activity is associated with increased viability of human myoblasts. In addition to its detoxifying activity, aldehyde dehydrogenase can also catalyze the irreversible oxidation of vitamin A to retinoic acid; therefore, we examined whether retinoic acid is important for myoblast viability. We showed that when exposed to oxidative stress induced by hydrogen peroxide, adherent human myoblasts entered apoptosis and lost their capacity for adhesion. Pre-treatment with retinoic acid reduced the cytotoxic damage ex vivo and enhanced myoblast survival in transplantation assays. The effects of retinoic acid were maintained in dystrophic myoblasts derived from facioscapulohumeral patients. RT-qPCR analysis of antioxidant gene expression revealed glutathione peroxidase 3 (Gpx3), a gene encoding an antioxidant enzyme, as a potential retinoic acid target gene in human myoblasts. Knockdown of Gpx3 using short interfering RNA induced elevation in reactive oxygen species and cell death. The anti-cytotoxic effects of retinoic acid were impaired in GPx3-inactivated myoblasts, which indicates that GPx3 regulates the antioxidative effects of retinoic acid. Therefore, retinoid status and GPx3 levels may have important implications for the viability of human muscle stem cells.

Myostatin up-regulation is associated with the skeletal muscle response to hypoxic stimuli.

Myostatin and hypoxia signalling pathways are able to induce skeletal muscle atrophy, but whether a relationship between these two pathways exists is currently unknown. Here, we tested the hypothesis that a potential mechanism for hypoxia effect on skeletal muscle may be through regulation of myostatin. We reported an induction of myostatin expression in muscles of rats exposed to chronic hypoxia. Interestingly, we also demonstrated increased skeletal muscle myostatin protein expression in skeletal muscle of hypoxemic patients with severe chronic obstructive pulmonary disease (COPD). Parallel studies in human skeletal muscle cell cultures showed that induction of myostatin expression in myotubes treated with hypoxia-mimicking agent such as cobalt chloride (CoCl(2)) is associated with myotube atrophy. Furthermore, we demonstrated that inhibition of myostatin by means of genetic deletion of myostatin or treatment with blocking antimyostatin antibodies inhibits the CoCl(2)-induced atrophy in muscle cells. Finally, addition of recombinant myostatin restored the CoCl(2)-induced atrophy in myostatin deficient myotubes. These results strongly suggest that myostatin can play an essential role in the adaptation of skeletal muscle to hypoxic environment.

Aldehyde dehydrogenase activity promotes survival of human muscle precursor cells.

Aldehyde dehydrogenases (ALDH) are a family of enzymes that efficiently detoxify aldehydic products generated by reactive oxygen species and might therefore participate in cell survival. Because ALDH activity has been used to identify normal and malignant cells with stem cell properties, we asked whether human myogenic precursor cells (myoblasts) could be identified and isolated based on their levels of ALDH activity. Human muscle explant-derived cells were incubated with ALDEFLUOR, a fluorescent substrate for ALDH, and we determined by flow cytometry the level of enzyme activity. We found that ALDH activity positively correlated with the myoblast-CD56(+) fraction in those cells, but, we also observed heterogeneity of ALDH activity levels within CD56-purified myoblasts. Using lentiviral mediated expression of shRNA we demonstrated that ALDH activity was associated with expression of Aldh1a1 protein. Surprisingly, ALDH activity and Aldh1a1 expression levels were very low in mouse, rat, rabbit and non-human primate myoblasts. Using different approaches, from pharmacological inhibition of ALDH activity by diethylaminobenzaldehyde, an inhibitor of class I ALDH, to cell fractionation by flow cytometry using the ALDEFLUOR assay, we characterized human myoblasts expressing low or high levels of ALDH. We correlated high ALDH activity ex vivo to resistance to hydrogen peroxide (H(2) O(2) )-induced cytotoxic effect and in vivo to improved cell viability when human myoblasts were transplanted into host muscle of immune deficient scid mice. Therefore detection of ALDH activity, as a purification strategy, could allow non-toxic and efficient isolation of a fraction of human myoblasts resistant to cytotoxic damage.