Autistic Characteristics in a Nationally Representative Clinical Sample of Adolescents Seeking Medical Gender-Affirming Treatment in Norway.

PURPOSE: Several studies have reported on the intersection of autism and gender incongruence (GI) in clinical populations. This study aims to investigate autistic characteristics and registered autism spectrum diagnoses (ASD) in a clinical cohort of 83 adolescents referred to the National Gender Team for Children and Adolescents in Norway during 2020. METHODS: Parents completed the Social Responsiveness Scale (SRS). Background information and registered psychiatric diagnoses were extracted from patient files. RESULTS: The results showed that 25% of the participants scored within the clinical range on the SRS: 27.4% of adolescents who were assigned female at birth (AFAB) and 19.0% of adolescents who were assigned male at birth (AMAB). AFAB had significantly higher scores on SRS Total Scale and the Social Motivation and Autistic Mannerisms subscales compared to the female norm group. AMAB had higher scores on the Social Motivation subscale and lower scores on the Social Awareness subscale, compared to the male norm population. Information from patient files revealed that 67.5% had one or more registered psychiatric diagnosis. 9.6% had received an ASD diagnosis, all AFAB. 18.1% had received an attention deficit hyperactivity disorder (ADHD) diagnosis. The most common psychiatric diagnoses were depression (25.3%) and anxiety disorders (18.1%). Further, 44.6% had a history of self-harm, and 15.7% had a history of a suicide attempt. CONCLUSION: The results showed an overrepresentation of ASD diagnoses and autistic characteristics measured by SRS for AFAB. There was an overrepresentation of psychiatric diagnoses for both the AFAB and the AMAB group in this study sample. Implications for treatment and future research are discussed.

Chest Wall Contouring in Transgender Men: A 20-Year Experience from a National Center.

Several western countries have experienced a drastic increase of referrals to specialist gender services of transgender and gender-diverse people. Chest wall contouring is an important element in treatment of gender dysphoria. National data concerning this group have yet to be investigated. The aim of this study was to examine and evaluate the techniques and surgical outcome of chest wall contouring from the last 20 years from a single center in Norway. Methods: This study is a retrospective review of all female-to-male patients who underwent chest wall contouring surgery at Oslo University Hospital between 2000 and 2020. Statistical analysis with comparison of techniques and evaluation of development over time was examined. Results: In total, 333 patients underwent bilateral chest wall contouring, 209 (62.8%) with inframammary incision with free nipple graft (IM), and 124 (37.2%) with periareolar technique (PA). In 20 years, the average age decreased from 31 (19-68) to 24.9 years (17-61). Average body mass index was significantly lower in the PA-group than in the IM-group. Complication rate was 20.7%, with postoperative bleeding being the most frequent (9.6%). Revision surgery was required in 24.9% of the cases; periareolar technique required significantly more procedures. Conclusions: The number of patients referred and operated on has increased drastically over a 20-year period. When comparing the techniques, the outcome concerning complications and revisions is at an acceptable level. Postoperative bleeding and revision surgery occur more often with the periareolar technique. There remains a knowledge gap concerning quality of life and satisfaction after surgery within this patient group.

Understanding sexual health concerns among adolescents and young adults with differences of sex development: a qualitative study.

PURPOSE: Differences of sex development (DSD) are congenital conditions that involve variations in individuals' sex chromosomes, genes, external and/or internal genitalia, hormones, and/or secondary sex characteristics. This study sought to elucidate the experiences of adolescents and young adults living with DSD by focusing on their experiences of intimacy and sexual health. METHODS: An interpretative phenomenological research design was adopted. Semi-structured qualitative interviews were conducted with 11 Norwegian adolescents and young adults aged 16-26 years who had five different DSD conditions. The interview findings were analysed by means of a reflexive thematic analysis. RESULTS: The participants reported feeling different, both in terms of how their body functioned and how their body looked. Lack of knowledge increased this feeling of differentness. Moreover, lack of everyday language with which to talk about intimacy and sexual concerns resulted in the participants feeling stigma. Anticipating stigmatization and lacking everyday language complicated the participants' communication regarding their DSD and sexual health. CONCLUSIONS: The sexual experiences of adolescents and young adults with DSD are diverse. Fear of stigmatization and lack of everyday language complicate communication with healthcare professionals and others. Understanding their unique needs is crucial to helping individuals achieve good sexual health.

Sexual well-being and penile appearance in adolescents operated for distal hypospadias in childhood.

BACKGROUND: The importance of patient-reported outcomes (PRO) in hypospadias is increasing. However, more knowledge is needed concerning genital self-perception on appearance and function in adolescents. The complication rates for distal hypospadias is different from that for severe hypospadias, and expected outcomes related to sexual well-being and cosmetics may also differ. OBJECTIVE: To investigate 16-year-olds' self-reported outcomes on penile appearance, sexual well-being, and voiding function in distal hypospadias, and compare with that of healthy male adolescents and a surgeon's view. STUDY DESIGN: Sixteen-year-old patients operated for distal hypospadias were included in this cross-sectional study and compared to a group of healthy adolescents. The assessment tools included the adolescents' self-perception on genital appearance and function measured by Pediatric Penile Perception Score (PPPS) and their responses to a structured interview. We also included information on clinical data from the electronic medical records, together with a physical examination and an uroflowmetry. RESULTS: Seventy patients and 61 healthy adolescents participated. Patients and the comparison group reported no differences on sexual well-being. The patients were satisfied with penile appearance, however their overall PPPS was significantly lower (8.9), compared to the comparison group (9.6, p = 0.03). Thirty-nine percent of patients had complications leading to re-interventions and reported lower scores on genital self-perception on appearance and function compared to those who had not re-interventions. Voiding function was normal. The surgeon's score on appearance was comparable to the patients' score. DISCUSSION: A key finding in our study is the patients' high satisfaction on sexual well-being, which was similar to healthy adolescents. The patients were also satisfied with penile appearance but scored significantly lower than the comparison group. Surgeons and patients had comparable scores on appearance; however, they seemed to emphasize different aspects of appearance. Our results on penile appearance and sexual well-being are comparable to those of other studies on distal hypospadias. In our study, re-interventions were associated with more negative genital self-perception on appearance and function, similar to findings in other studies. CONCLUSION: Our results show overall positive satisfaction on sexual well-being, voiding function and penile appearance despite less satisfaction on penile appearance when compared with the comparison group. Satisfaction was reported to be good also in patients experiencing re-interventions.

A 15-20-year follow-up of mental health, psychosocial functioning and quality of life in a single center sample of individuals with differences in sex development.

Background: The aim of the study was to present metal health, psychosocial functioning and quality of life (QoL) of children and adolescents with a difference in sex development (DSD) from their first visit in the newly established multidisciplinary team in 2002-2004 in Norway. A secondary aim was to explore mental health, psychosocial functioning and QoL in the same cohort patient's as for today and finally explore any childhood predictors for these outcomes in adulthood. Methods: The first part of the study took place in 2002-2004 in a mixed cohort of children and adolescents born with a DSD in 1982-2002, compared to a healthy comparison group. This part involved semi-structured interviews and self-reported and proxy-reported questionnaires. The second part of the study is a longitudinal study of the same participants 15-20 years later (2018-2020). Results: The participants at baseline of the study consisted of 33 patients; 24 assigned females (congenital adrenal hyperplasia, androgen insensitivity syndrome, gonadal dysgenesis and ovotesticular DSD) and nine assigned males; all with a hypospadias diagnosis. Significant differences were found for behavioral and emotional problems between groups, 46, XX females with significant higher total scores on YSR (49.43 + 24.17, p = .047); 46, XY females (21.00 + 12.04, p = .032); and higher internalizing problems scores (YSR) in 46, XX females (16.57 + 9.74), compared with the 46, XY females (5.60 + 5.32, p = .047). A positive association between QoL of the participants in adulthood and PedsQL' social function (r = .657, p = .020) and psychosocial function in childhood (r = .596, p = .041) was found. Conclusions: In summary, this study demonstrated that adolescents assigned females with DSD might have more psychiatric problems and a poorer degree of psychosocial functioning compared to a healthy comparison group. As we do find an association with these problems in adolescence and later adult QoL, it is of great importance to respond to these behaviors in early life.

'It was Supposed to be a Secret': a study of disclosure and stigma as experienced by adults with differences of sex development.

Background: Differences of sex development (DSD) are a group of congenital conditions that involve variations in sex chromosomes, genes, external and/or internal genitalia, hormones, and secondary sex characteristics. The present study sought to highlight the everyday challenges faced by adults with DSD as well as to understand how issues such as disclosure, information sharing, and stigma affect their daily life. Method: We applied an interpretative phenomenological study design to explore the first-person perspectives. Semi-structured qualitative interviews of 15 adults aged 30-70 years living in Norway with five different DSD conditions (Turner syndrome, Klinefelter syndrome, congenital adrenal hyperplasia, Mayer-Rokitansky-Küster-Hauser syndrome and hypospadias) were analyzed using reflexive thematic analysis. Results: Living with DSD, indicated doing a balancing act between hiding and/or exposing what participants perceived differed from others bodies. Communication regarding sensitive topics proved to be important. The participants were doing invisible work to manage the balance between concealing and revealing their feeling of differentness, a work effort that was not necessarily perceivable to others but still affected everyday life of the participants. Furthermore, the participants' experiences of disclosure changed over time, as those who were diagnosed during childhood found that disclosure became easier with advancing age. However, being diagnosed as an adult seemed to increase the feeling of difference and complicate disclosure. Conclusion: Individuals with DSD should receive adequate information and have someone to practice disclosure towards, which could possibly strengthen the psychosocial aspects of living with their condition. The results emphasize the need to help individuals with DSD achieve a balance between disclosure and self-protection, overcome stigma, and determine when and how information about their DSD should be provided to others.

Negotiating Gender in Everyday Life: Toward a Conceptual Model of Gender Dysphoria in Adolescents.

A growing number of adolescents are seeking medical care to alleviate gender dysphoria (GD). This qualitative study explored the subjective experiences of GD among help-seeking transgender and gender nonconforming (TGNC) youth in order to develop a more nuanced conceptualization of the phenomenon. Fifteen life-mode interviews were conducted with newly referred youth between the ages of 13 and 19. All participants were assigned female at birth. The data were analyzed using thematic analysis. The participants targeted five major themes that characterize GD: (1) Bodily sensations were constant reminders of GD throughout the day, (2) emotional memories from the past of being different and outside triggered GD, (3) the process of coming out was a transformative experience that changed how the participants understood themselves, (4) GD both increased and decreased in relation to others, (5) everyday life required careful negotiation to feel whole without developing new forms of GD. Based on the results, we suggest a more conceptually nuanced model of GD, one which accounts for how bodily sensations and emotional memories from the past were sources that elicited GD. The sources were mediated through the process of coming out and relating to others, and this resulted in the negotiation of GD today. The conceptual model suggested in the present study could ideally shed light on preexisting knowledge on TGNC youth struggling with GD. In addition, an improved understanding of GD could ideally help clinicians when addressing individual treatment needs.

High satisfaction on genital self-perception and sexual function in healthy Norwegian male adolescents.

BACKGROUND: Genital self-perception and self-reported outcome on sexual function represent important information in studies focusing on male adolescents born with a genital malformation. Normal data from an age-matched control group are essential for comparison and more knowledge is needed concerning age after puberty and before entering adulthood. OBJECTIVE: To investigate the self-reported outcome on genital perception and sexual outcome of healthy male adolescents aged 16 and 17 years. STUDY DESIGN: Sixty-one individuals were included in this cross-sectional study. The assessment tools included the adolescents' self-report on genital perception and sexual function measured by the Pediatric Penile Perception Score (PPPS) and their responses to a semi-structured interview. In addition, we added information on mental health and psychosocial functioning measured by the Strengths and Difficulties Questionnaire, and health-related quality of life (HRQoL) measured by the Pediatric Quality of Life Inventory. Body satisfaction and self-esteem were also measured by the Global Self-Worth and Physical Appearance subscales of the revised version of the Self-Perception Profile for Adolescents (SPPA). RESULTS: Of the 73 individuals invited, a total of 61 participated. The adolescents reported high satisfaction on genital self-perception and sexual function with a score close to 10 on the overall PPPS score (maximum overall score is 12). Participants who were dissatisfied with their genitals reported penile length, alongside foreskin, as their main concern. More than 90% reported satisfaction on sexual function, concerning erection, masturbation, ejaculation, and orgasm. Results showed a higher score on body satisfaction, self-esteem, mental health and psychosocial functioning and a lower score on HRQoL compared to the normative Norwegian data. The small numbers of individuals that scored more negatively on genital self-perception and sexual function also scored more negatively in all items studied. DISCUSSION: A key finding in our study was their high satisfaction on the overall PPPS score and reported sexual function. The results are comparable to other studies related to healthy male adolescents and the sample studied deviate little from a representative Norwegian sample. A comparison group of age-matched adolescents from the normative population is important to determine long-term outcomes on genital appearance and sexual function of patients born with a genital malformation and operated on in early childhood. Limitations of this study are the small sample-size and the lack of information on non-participants. CONCLUSIONS: Our results show generally positive genital self-perception and sexual function in a healthy group of Norwegian male adolescents, aged 16 and 17.

Sexual Orientation in Individuals With Congenital Adrenal Hyperplasia: A Systematic Review.

Congenital adrenal hyperplasia (CAH) is a genetic condition of the steroidogenic enzymes in the adrenal cortex normally leading to variable degrees of cortisol and aldosterone deficiency as well as androgen excess. Exposure to androgens prenatally might lead to ambiguous genitalia. The fetal brain develops in traditional male direction through a direct action of androgens on the developing nerve cells, or in the traditional female direction in the absence of androgens. This may indicate that sexual development, including sexual orientation, are programmed into our brain structures prenatally. The objective of this study was to perform a systematic review of the literature, investigating sexual orientation in individuals with CAH. The study also aimed at identifying which measures are used to define sexual orientation across studies. The review is based on articles identified through a comprehensive search of the OVIDMedline, PsycINFO, CINAHL, and Web of Science databases published up to May 2019. All peer-reviewed articles investigating sexual orientation in people with CAH were included. Quantitative, qualitative, and mixed methods were considered, as well as self-, parent-, and third-party reports, and no age or language restrictions were enforced on publications. The present review included 30 studies investigating sexual orientation in patients with CAH assigned female at birth (46, XX) (n = 927) or assigned male at birth (46, XY and 46, XX) (n = 274). Results indicate that assigned females at birth (46, XX) with CAH had a greater likelihood to not have an exclusively heterosexual orientation than females from the general population, whereas no assigned males at birth (46, XY or 46, XX) with CAH identified themselves as non-heterosexual. There was a wide diversity in measures used and a preference for unvalidated and self-constructed interviews. Hence, the results need to be interpreted with caution. Methodological weaknesses might have led to non-heterosexual orientation being overestimated or underestimated. The methodological challenges identified by this review should be further investigated in future studies.

Time trends in referrals to child and adolescent gender identity services: a study in four Nordic countries and in the UK.

Purpose: To explore whether the increase observed in referrals to child and adolescent gender identity services (GIDSs) has been similar in four Nordic countries and in the UK.Materials and methods: Numbers of referrals per year in 2011-2017 were obtained from all GIDS in Denmark, Finland, Norway, Sweden and the UK and related to population aged <18.Results: A similar pattern of increase in referral rates was observed across countries, resulting in comparable population adjusted rates in 2017. In children, male:female birth sex ratio was even; in adolescents, a preponderance of females (birth sex) was observed, particularly in Finland.Conclusions: The demand for GIDSs has evolved similarly across Nordic countries and the UK. The reasons for the increase are not known but increased awareness of gender identity issues, service availability, destigmatization as well as social and media influences may play a role.

Low Circulating Levels of Mitochondrial and High Levels of Nuclear DNA Predict Mortality in Chronic Heart Failure.

BACKGROUND: Mitochondrial DNA (mtDNA) and possibly nuclear DNA (nDNA) are released as danger-associated molecular patterns during cardiac stress, and may activate several innate immune receptors. The purpose of this study was to investigate the regulation of these danger-associated molecular patterns during human heart failure (HF). METHODS AND RESULTS: Plasma levels of mtDNA and nDNA from HF patients (n = 84) were analyzed by reverse transcriptase-polymerase chain reaction and compared with controls (n = 72). Increased levels of mtDNA were found in New York Heart Association (NYHA) I-II and NYHA III-IV. There was evidence of increased nDNA in NYHA III-IV compared with controls and NYHA I-II. Kaplan-Meier analysis revealed higher mortality in patients with high nDNA levels, whereas high levels of mtDNA were associated with survival. CONCLUSIONS: Plasma levels of mtDNA and nDNA are elevated in human HF associated with increased and decreased mortality, respectively. This study may suggest a rationale for exploring interventions within inflammatory signaling pathways activated by nucleic acids as novel targets in treatment of HF.

Lumican is increased in experimental and clinical heart failure, and its production by cardiac fibroblasts is induced by mechanical and proinflammatory stimuli.

During progression to heart failure (HF), myocardial extracellular matrix (ECM) alterations and tissue inflammation are central. Lumican is an ECM-localized proteoglycan associated with inflammatory conditions and known to bind collagens. We hypothesized that lumican plays a role in the dynamic alterations in cardiac ECM during development of HF. Thus, we examined left ventricular cardiac lumican in a mouse model of pressure overload and in HF patients, and investigated expression, regulation and effects of increased lumican in cardiac fibroblasts. After 4 weeks of aortic banding, mice were divided into groups of hypertrophy (AB) and HF (ABHF) based on lung weight and left atrial diameter. Sham-operated mice were used as controls. Accordingly, cardiac lumican mRNA and protein levels were increased in mice with ABHF. Similarly, cardiac biopsies from patients with end-stage HF revealed increased lumican mRNA and protein levels compared with control hearts. In vitro, mechanical stretch and the proinflammatory cytokine interleukin-1ß increased lumican mRNA as well as secreted lumican protein from cardiac fibroblasts. Stimulation with recombinant glycosylated lumican increased collagen type I alpha 2, lysyl oxidase and transforming growth factor-ß1 mRNA, which was attenuated by costimulation with an inhibitor of the proinflammatory transcription factor NFκB. Furthermore, lumican increased the levels of the dimeric form of collagen type I, decreased the activity of the collagen-degrading enzyme matrix metalloproteinase-9 and increased the phosphorylation of fibrosis-inducing SMAD3. In conclusion, cardiac lumican is increased in experimental and clinical HF. Inflammation and mechanical stimuli induce lumican production by cardiac fibroblasts and increased lumican altered molecules important for cardiac remodeling and fibrosis in cardiac fibroblasts, indicating a role in HF development.

Decorin, lumican, and their GAG chain-synthesizing enzymes are regulated in myocardial remodeling and reverse remodeling in the mouse.

On the basis of the role of small, leucine-rich proteoglycans (SLRPs) in fibrogenesis and inflammation, we hypothesized that they could be involved in cardiac remodeling and reverse remodeling as occurs during aortic stenosis and after aortic valve replacement. Thus, in a well-characterized aortic banding-debanding mouse model, we examined the SLRPs decorin and lumican and enzymes responsible for synthesis of their glycosaminoglycan (GAG) chains. Four weeks after banding of the ascending aorta, mice were subjected to a debanding operation (DB) and were subsequently followed for 3 or 14 days. Sham-operated mice served as controls. Western blotting revealed a 2.5-fold increase in the protein levels of glycosylated decorin in mice with left ventricular pressure overload after aortic banding (AB) with a gradual decrease after DB. Interestingly, protein levels of three key enzymes responsible for decorin GAG chain synthesis were also increased after AB, two of them gradually declining after DB. The inflammatory chemokine (C-X-C motif) ligand 16 (CXCL16) was increased after AB but was not significantly altered following DB. In cardiac fibroblasts CXCL16 increased the expression of the GAG-synthesizing enzyme chondroitin polymerizing factor (CHPF). The protein levels of lumican core protein with N-linked oligosaccharides increased by sevenfold after AB and decreased again 14 days after DB. Lumican with keratan sulfate chains was not regulated. In conclusion, this study shows alterations in glycosylated decorin and lumican core protein that might be implicated in myocardial remodeling and reverse remodeling, with a potential important role for CS/DS GAG chain-synthesizing enzymes.

Chemokines regulate small leucine-rich proteoglycans in the extracellular matrix of the pressure-overloaded right ventricle.

Chemokines have been suggested to play a role during development of left ventricular failure, but little is known about their role during right ventricular (RV) remodeling and dysfunction. We have previously shown that the chemokine (C-X-C motif) ligand 13 (CXCL13) regulates small leucine-rich proteoglycans (SLRPs). We hypothesized that chemokines are upregulated in the pressure-overloaded RV, and that they regulate SLRPs. Mice with RV pressure overload following pulmonary banding (PB) had a significant increase in RV weight and an increase in liver weight after 1 wk. Microarray analysis (Affymetrix) of RV tissue from mice with PB revealed that CXCL10, CXCL6, chemokine (C-X3-C motif) ligand 1 (CX3CL1), chemokine (C-C motif) ligand 5 (CCL5), CXCL16, and CCL2 were the most upregulated chemokines. Stimulation of cardiac fibroblasts with these same chemokines showed that CXCL16 increased the expression of the four SLRPs: decorin, lumican, biglycan, and fibromodulin. CCL5 increased the same SLRPs, except decorin, whereas CX3CL1 increased the expression of decorin and lumican. CXCL16, CX3CL1, and CCL5 were also shown to increase the levels of glycosylated decorin and lumican in the medium after stimulation of fibroblasts. In the pressure-overloaded RV tissue, Western blotting revealed an increase in the total protein level of lumican and a glycosylated form of decorin with a higher molecular weight compared with control mice. Both mice with PB and patients with pulmonary stenosis had significantly increased circulating levels of CXCL16 compared with healthy controls measured by enzyme immunoassay. In conclusion, we have found that chemokines are upregulated in the pressure-overloaded RV and that CXCL16, CX3CL1, and CCL5 regulate expression and posttranslational modifications of SLRPs in cardiac fibroblasts. In the pressure-overloaded RV, protein levels of lumican were increased, and a glycosylated form of decorin with a high molecular weight appeared.

Lack of chemokine signaling through CXCR5 causes increased mortality, ventricular dilatation and deranged matrix during cardiac pressure overload.

RATIONALE: Inflammatory mechanisms have been suggested to play a role in the development of heart failure (HF), but a role for chemokines is largely unknown. Based on their role in inflammation and matrix remodeling in other tissues, we hypothesized that CXCL13 and CXCR5 could be involved in cardiac remodeling during HF. OBJECTIVE: We sought to analyze the role of the chemokine CXCL13 and its receptor CXCR5 in cardiac pathophysiology leading to HF. METHODS AND RESULTS: Mice harboring a systemic knockout of the CXCR5 (CXCR5(-/-)) displayed increased mortality during a follow-up of 80 days after aortic banding (AB). Following three weeks of AB, CXCR5(-/-) developed significant left ventricular (LV) dilatation compared to wild type (WT) mice. Microarray analysis revealed altered expression of several small leucine-rich proteoglycans (SLRPs) that bind to collagen and modulate fibril assembly. Protein levels of fibromodulin, decorin and lumican (all SLRPs) were significantly reduced in AB CXCR5(-/-) compared to AB WT mice. Electron microscopy revealed loosely packed extracellular matrix with individual collagen fibers and small networks of proteoglycans in AB CXCR5(-/-) mice. Addition of CXCL13 to cultured cardiac fibroblasts enhanced the expression of SLRPs. In patients with HF, we observed increased myocardial levels of CXCR5 and SLRPs, which was reversed following LV assist device treatment. CONCLUSIONS: Lack of CXCR5 leads to LV dilatation and increased mortality during pressure overload, possibly via lack of an increase in SLRPs. This study demonstrates a critical role of the chemokine CXCL13 and CXCR5 in survival and maintaining of cardiac structure upon pressure overload, by regulating proteoglycans essential for correct collagen assembly.

Efficacy and Safety of Percutaneous Epiphysiodesis Operation around the Knee to Reduce Adult Height in Extremely Tall Adolescent Girls and Boys.

Objective. The aim was to determine efficacy and safety of a surgical method to reduce adult height in extremely tall adolescents. Methods. Data for all girls (n = 12) and boys (n = 9) in our center subjected to bilateral percutaneous epiphysiodesis around the knee who had reached final height were included. Final height predictions were based on hand and wrist X-rays before surgery. Results. When compared to prediction, adult height was reduced by 4.1 ± 0.7 cm in treated girls (P < .001) and 6.4 ± 0.7 cm in treated boys (P < .001) corresponding to a 33.6 ± 3.4% and 33.6 ± 4.2% reduction of remaining growth, respectively. Besides mild to moderate postoperative pain reported in 9 operated individuals, no other side effects were reported. Postoperative X-rays confirmed growth plate closure and absence of leg angulations. Conclusions. Bilateral epiphysiodesis is an effective and safe method to reduce adult height in extremely tall girls and boys.

Circulating cytokine levels in mice with heart failure are etiology dependent.

OBJECTIVES: The aim of this study was to examine whether alterations in circulating cytokine levels are dependent on the etiology of myocardial hypertrophy and heart failure (HF). BACKGROUND: Several heart diseases are associated with altered levels of circulating cytokines. Cytokines are regarded as possible therapeutic targets or biomarkers, but such approaches are currently not in clinical use. If alterations in circulating cytokines are etiology dependent, this should be taken into consideration when using cytokines as disease markers and therapeutic targets. METHODS: The serum levels of 25 cytokines were quantified with Luminex and/or ELISA in four murine models of heart disease: banding of the ascending aorta (AB) or the pulmonary artery (PB), myocardial infarction (MI), and a cardiomyopathy model with inducible cardiomyocyte-specific knockout of the sarco(endo)plasmatic reticulum Ca2+-ATPase (SERCA2KO). RESULTS: No increase in circulating cytokine levels were found in mice 1 wk after AB, although substantial myocardial hypertrophy was present. After 1 wk of MI, only interleukin (IL)-18 was increased. In the SERCA2KO mice with HF, circulating levels of IL-1alpha, IL-2, IL-3, IL-6, IL-9, IL-10, IL-12p40, eotaxin, granulocyte-colony stimulating factor (G-CSF), interferon-gamma, monocyte chemoattractant protein-1, macrophage inflammatory protein-1beta were increased, and in mice with PB, IL-1alpha, IL-6, G-CSF, and monokine induced by gamma-interferon showed elevated levels. CONCLUSIONS: Serum levels of cytokines in mice with HF vary depending on the etiology. Increased serum levels of several cytokines were found in models with increased right ventricular afterload, suggesting that the cytokine responses result primarily from systemic congestion.

Increased production of CXCL16 in experimental and clinical heart failure: a possible role in extracellular matrix remodeling.

BACKGROUND: Inflammation has been implicated in the pathogenesis of heart failure (HF), but knowledge about the production and role of inflammatory actors remains incomplete. On the basis of its role in vascular inflammation, vascular proliferation, and matrix degradation, we hypothesized a role for the chemokine CXCL16 in the pathogenesis of myocardial remodeling and development of HF. METHODS AND RESULTS: Our main findings were (1) patients with chronic HF (n=188) had increased plasma levels of CXCL16, which correlated with disease severity. (2) Left ventricular tissue from patients with end-stage HF (n=8) showed enhanced CXCL16 levels compared with nonfailing left ventricular (n=6) as assessed by Western blotting. (3) In mice with postmyocardial infarction HF, expression of CXCL16, as assessed by real-time RT-PCR, was increased in the infarcted and the noninfarcted areas of left ventricular 3 and 7 days after coronary ligation, indicating early onset of CXCL16 production. Furthermore, mice exposed to aortic banding had enhanced CXCL16 expression in left ventricular, indicating that CXCL16 expression is not related to ischemia alone. (4) In vitro, CXCL16 promoted proliferation and impaired collagen synthesis in myocardial fibroblasts, and in cardiomyocytes and myocardial fibroblasts, CXCL16 increased matrix metalloproteinase activity, primarily reflecting increased matrix metalloproteinase-2 levels. (5) By using specific inhibitors, we showed that the effect of CXCL16 on fibroblasts involved activation of Jun N-terminal kinase. CONCLUSIONS: We show enhanced myocardial CXCL16 expression in experimental and clinical HF. The effect of CXCL16 on cardiomyocytes and fibroblasts suggests a role for CXCL16 in matrix remodeling and ultimately in the development of HF.

Cytokine expression profiling of the myocardium reveals a role for CX3CL1 (fractalkine) in heart failure.

Several lines of evidence suggest that inflammatory processes mediated by cytokines are involved in the pathogenesis of heart failure (HF). However, the regulation of cytokine expression and the role of cytokines during HF development are not well understood. To address this issue, we have examined alterations in gene expression during HF progression by microarray technology in non-infarcted left ventricular (LV) murine tissue at various time points after myocardial infarction (MI). The highest number of regulated genes was found five days after MI. In total, we identified 14 regulated genes encoding cytokines with no previous association to HF. The strongest up-regulation was found for the chemokine fractalkine (CX3CL1). In human failing hearts we detected a 3-fold increase in CX3CL1 protein production, and both cardiomyocytes and fibrous tissue revealed immunoreactivity for CX3CL1 and its specific receptor CX3CR1. We also found that the circulating level of CX3CL1 was increased in patients with chronic HF in accordance with disease severity (1.6-fold in NYHA II, 2.2-fold in NYHA III and 2.9-fold in NYHA IV). In vitro experiments demonstrated that CX3CL1 production could be induced by inflammatory cytokines known to be highly expressed in HF. CX3CL1 itself induced the expression of markers of cardiac hypertrophy and protein phosphatases in neonatal cardiomyocytes. Given the increased CX3CL1 production in both an experimental HF model and in patients with chronic HF as well as its direct effects on cardiomyocytes, we suggest a role for CX3CL1 and its receptor CX3CR1 in the pathogenesis of HF.