ABSTRACT
Physiology and metabolism are often sexually dimorphic, but the underlying mechanisms remain incompletely understood. Here, we use the intestine of Drosophila melanogaster to investigate how gut-derived signals contribute to sex differences in whole-body physiology. We find that carbohydrate handling is male-biased in a specific portion of the intestine. In contrast to known sexual dimorphisms in invertebrates, the sex differences in intestinal carbohydrate metabolism are extrinsically controlled by the adjacent male gonad, which activates JAK-STAT signaling in enterocytes within this intestinal portion. Sex reversal experiments establish roles for this male-biased intestinal metabolic state in controlling food intake and sperm production through gut-derived citrate. Our work uncovers a male gonad-gut axis coupling diet and sperm production, revealing that metabolic communication across organs is physiologically important. The instructive role of citrate in inter-organ communication might be significant in more biological contexts than previously recognized.
Subject(s)
Carbohydrate Metabolism/physiology , Drosophila melanogaster/metabolism , Eating/physiology , Intestinal Mucosa/metabolism , Sex Characteristics , Sperm Maturation/physiology , Animals , Citric Acid/metabolism , Drosophila Proteins/metabolism , Female , Gene Expression , Janus Kinases/metabolism , Male , RNA-Seq , STAT Transcription Factors/metabolism , Signal Transduction , Sugars/metabolism , Testis/metabolismABSTRACT
INTRODUCTION: Although many studies on the short- and long-term effects of hormonal treatment (HT) in trans people focus on objective changes such as body composition or bone density, few studies have evaluated self-reported effects of HT. AIM: To evaluate self-reported symptoms during the first year of HT in trans people. METHODS: This study is part of the European Network for the Investigation of Gender Incongruence, a multicenter prospective cohort study. For this study, 205 trans women and 193 trans men from the gender clinics of Amsterdam, Ghent, and Florence, who were >18 years of age and started hormonal treatment were included. Questionnaires, self-developed based on the Menopause Rating scale and clinical experiences, were completed, and changes in symptom scores were analyzed using linear mixed models. MAIN OUTCOME MEASURES: Self-reported psycho vegetative symptoms, as well as physical, cognitive, emotional, sexual and genital complaints, and pain were evaluated at baseline and after 3, 6, and 12 months of HT using a 4-point Likert scale (no, mild, moderate, or severe complaints). RESULTS: In trans men, with a median age of 23, transient increases were reported in night sweats, weight gain, and clitoral pain. Persistent increases were reported for hot flashes, balding, voice instability, acne, and increase in sexual desire, whereas emotional instability, fear, and menses decreased. For trans women, with a median age of 29, hot flashes, night sweats, fatigue, weight gain, changes in olfactory sense, brittle nails, emotional instability, mood swings, and breast tenderness increased persistently during 12 months of HT, whereas a decrease was observed for balding and sexual desire. Sleeping difficulties decreased temporarily. No changes were observed in palpitations, dizziness, abdominal complaints, anxiety, panic attacks, cognition, and pain, except for clitoral and breast pain. CLINICAL IMPLICATIONS: Knowledge on the occurrence of these self-reported, subjective effects and their course over time may help physicians informing trans people starting with and during HT. STRENGTHS & LIMITATIONS: This study was performed in a large cohort of trans people. The follow-up period was limited to 12 months. CONCLUSION: Changes in self-reported symptoms were mentioned in all investigated areas, except cognition. Most symptoms were as expected and even desired, whereas others may be considered unpleasant by some trans people. van Dijk D, Dekker MJHJ, Conemans EB, et al. Explorative Prospective Evaluation of Short-Term Subjective Effects of Hormonal Treatment in Trans People-Results from the European Network for the Investigation of Gender Incongruence. J Sex Med 2019;16:1297-1309.
Subject(s)
Gender Dysphoria/drug therapy , Hormones/therapeutic use , Transsexualism , Adult , Anxiety/epidemiology , Cohort Studies , Emotions , Female , Gender Dysphoria/psychology , Humans , Male , Prospective Studies , Self Report , Surveys and Questionnaires , Treatment Outcome , Young AdultABSTRACT
Despite a relatively permissive abortion law, women in the Netherlands encounter difficulties in accessing abortion care. Little is known about their experiences. This study explores women's experiences with (online) abortion services and relevant health professionals' experiences delivering care, with the goal of identifying key barriers encountered by abortion-seekers in the Netherlands. An exploratory qualitative research design with a constructivist approach and an abbreviated grounded theory method was used. Interviews with 20 women who had had an abortion and 14 health professionals who provide abortion care, and 200 emails of women seeking abortion care through the non-governmental organisation Women on Web, were coded inductively and deductively (using the Candidacy Framework) thereby generating themes. Abortion-seekers faced barriers including: (i) burden of taboo, (ii) vulnerability (emotional, financial, and social), (iii) health professional evaluation and (iv) disempowerment and distress. The overarching theme was women's lack of autonomy in access to abortion care. The key barriers to abortion access in the Netherlands are the institutionalisation of taboo in abortion law and care, complex candidacy regulations, lack of permeability for certain marginalised groups, and women's inability to speak openly about abortion. To increase the permeability of abortion care, and thereby women's autonomy, legislators and policy-makers must trust women to make their own reproductive decisions and avoid actions that stigmatise abortion and hinder access to care, while actively developing systemic support for vulnerable groups.