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1.
J Cell Sci ; 131(17)2018 09 07.
Artigo em Inglês | MEDLINE | ID: mdl-30111581

RESUMO

Maintenance and activation of the limited supply of primordial follicles in the ovary are important determinants of reproductive lifespan. Currently, the molecular programme that maintains the primordial phenotype and the early events associated with follicle activation are not well defined. Here, we have systematically analysed these events using microscopy and detailed image analysis. Using the immature mouse ovary as a model, we demonstrate that the onset of granulosa cell (GC) proliferation results in increased packing density on the oocyte surface and consequent GC cuboidalization. These events precede oocyte growth and nuclear translocation of FOXO3a, a transcription factor important in follicle activation. Immunolabelling of the TGFß signalling mediators and transcription factors SMAD2/3 revealed a striking expression pattern specific to GCs of small follicles. SMAD2/3 were expressed in the nuclei of primordial GCs but were mostly excluded in early growing follicles. In activated follicles, GC nuclei lacking SMAD2/3 generally expressed Ki67. These findings suggest that the first phenotypic changes during follicle activation are observed in GCs, and that TGFß signalling is fundamental for regulating GC arrest and the onset of proliferation.


Assuntos
Núcleo Celular/metabolismo , Células da Granulosa/metabolismo , Folículo Ovariano/metabolismo , Ovário/metabolismo , Proteína Smad2/metabolismo , Proteína Smad3/metabolismo , Animais , Núcleo Celular/genética , Proliferação de Células , Feminino , Proteína Forkhead Box O3/genética , Proteína Forkhead Box O3/metabolismo , Células da Granulosa/citologia , Camundongos , Camundongos Endogâmicos C57BL , Oócitos/citologia , Oócitos/metabolismo , Folículo Ovariano/crescimento & desenvolvimento , Ovário/crescimento & desenvolvimento , Transporte Proteico , Transdução de Sinais , Proteína Smad2/genética , Proteína Smad3/genética , Fator de Crescimento Transformador beta1/metabolismo
2.
Int J Mol Sci ; 22(1)2020 Dec 29.
Artigo em Inglês | MEDLINE | ID: mdl-33383677

RESUMO

Polycystic ovary syndrome (PCOS) is a common endocrinopathy that is associated with an adverse metabolic profile including reduced postprandial thermogenesis. Although abnormalities in adipose tissue function have been widely reported in women with PCOS, less is known about direct effects of androgen on white and, particularly, brown adipocytes. The purpose of this study was to investigate the effect of the nonaromatizable androgen dihydrotestosterone (DHT) on (1) lipid accumulation and expression of adipogenic markers in immortalized mouse brown adipose cell lines (IMBATs), (2) mitochondrial respiration in IMBATs, (3) mitochondrial DNA content and gene expression, (4) expression of brown adipose tissue (BAT) markers and thermogenic activation. In addition, we profiled the relative levels of 38 adipokines secreted from BAT explants and looked at androgen effects on adipokine gene expression in both IMBATs and immortalized mouse white adipose (IMWATs) cell lines. Androgen treatment inhibited IMBAT differentiation in a dose-dependent manner, reduced markers of adipogenesis, and attenuated the ß-adrenoceptor-stimulated increase in uncoupling protein-1 (UCP1) expression. In explants of mouse interscapular BAT, androgen reduced expression of UCP1, peroxisome proliferator-activated receptor-γ coactivator-1 (PCG-1) and Cidea. Significantly, as well as affecting genes involved in thermogenesis in BAT, androgen treatment reduced mitochondrial respiration in IMBATs, as measured by the Seahorse XF method. The results of this study suggest a role for excess androgen in inhibiting brown adipogenesis, attenuating the activation of thermogenesis and reducing mitochondrial respiration in BAT. Together, these data provide a plausible molecular mechanism that may contribute to reduced postprandial thermogenesis and the tendency to obesity in women with PCOS.


Assuntos
Adipócitos Marrons/metabolismo , Androgênios/metabolismo , Respiração Celular , Mitocôndrias/metabolismo , Adipócitos Marrons/citologia , Adipócitos Marrons/efeitos dos fármacos , Adipogenia/genética , Adipocinas/genética , Adipocinas/metabolismo , Androgênios/farmacologia , Animais , Diferenciação Celular/genética , Respiração Celular/efeitos dos fármacos , Suscetibilidade a Doenças , Metabolismo Energético , Feminino , Expressão Gênica , Redes e Vias Metabólicas , Camundongos , Mitocôndrias/efeitos dos fármacos , Síndrome do Ovário Policístico/etiologia , Síndrome do Ovário Policístico/metabolismo , Receptores Androgênicos/metabolismo , Termogênese/genética
3.
Reproduction ; 156(1): F1-F10, 2018 07.
Artigo em Inglês | MEDLINE | ID: mdl-29459401

RESUMO

Low-dose, step-up gonadotropin is the treatment of choice for women with polycystic ovary syndrome (PCOS) who have not conceived after anti-oestrogen treatment and as an effective alternative to pulsatile GnRH in women with hypogonadotropic hypogonadism (HH). There has been, however, no large-scale, comparative study between the two groups using low-dose gonadotropins. Here, we performed a retrospective, comparative analysis, in a single clinic database, of efficacy and safety of induction of ovulation using low-dose gonadotropins in 364 women with PCOS and 80 women with HH. The rate of ovulation was high in both PCOS (83%) and HH (84%) but mono-follicular, ovulatory cycles were more prevalent in PCOS than in HH (77% vs 53%, P < 0.0001) and the proportion of cycles that were abandoned was higher in HH than in PCOS (25% vs 15%, P < 0.0001). The median threshold dose of gonadotropin required to induce ovulation was 75 IU/day in PCOS and 113 IU/day in HH (P < 0.001) and the range of doses was greater in HH women. Forty-nine percent of women with PCOS and 65% of those with HH conceived (more than 90% within 6 cycles of treatment) and had at least one pregnancy. Multiple pregnancies (all twins) occurred in only 4% of women with PCOS and 5% of those with HH. These findings emphasise the efficacy and safety of low-dose gonadotropin treatment for both clomiphene-resistant women with PCOS and those with HH. These results highlight the importance of choosing the more physiological approach of gonadotropin induction of ovulation in both groups as the most appropriate treatment, in preference to IVF.


Assuntos
Anovulação/tratamento farmacológico , Fármacos para a Fertilidade Feminina/uso terapêutico , Fertilização in vitro/métodos , Indução da Ovulação/métodos , Síndrome do Ovário Policístico/complicações , Adulto , Anovulação/etiologia , Feminino , Humanos , Gravidez
4.
J Ment Health ; 27(3): 257-262, 2018 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-29707996

RESUMO

BACKGROUND: The average age of onset of psychosis coincides with the age of college enrollment. Little is known about the impact of educational engagement on DUP in a college-aged population. AIMS: To determine DUP, and the impact of educational engagement, for college-aged participants of the RAISE study (n = 404). METHOD: We conducted secondary data analyses on the publicly available RAISE dataset. Subsamples were analyzed to determine the impact of age and educational engagement on DUP. RESULTS: DUP was significantly shorter (p < 0.02) for participants who were college-aged (18-22 years, n = 44) and engaged in post-secondary education (median = 12 weeks, mean = 29 weeks) compared with participants who were college-aged and not engaged in higher education (n = 92, median = 29 weeks, mean = 44 weeks). CONCLUSIONS: Educational engagement appears to be associated with a shorter DUP. This may be partially explained by the presence of on-site wellness centers in college settings. However, even among young people who engaged in post-secondary education DUP was still at, or beyond, the upper limit of WHO recommendations in this group. Future research exploring how colleges could improve their capacity to detect and refer at risk students for treatment at an earlier stage is recommended.


Assuntos
Transtornos Psicóticos/epidemiologia , Transtornos Psicóticos/psicologia , Estudantes/psicologia , Adolescente , Adulto , Idade de Início , Bases de Dados Factuais , Humanos , Universidades , Adulto Jovem
5.
Mol Hum Reprod ; 20(4): 293-308, 2014 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-24270394

RESUMO

In mammals, members of the transforming growth factor-beta (TGF-ß) superfamily are known to have key roles in the regulation of follicular growth and development. The aim of the study was to evaluate the expression of TGF-ß superfamily growth factors, their receptors, downstream SMAD signalling molecules and TGF-ß/bone morphogenetic protein (BMP) antagonists during early human folliculogenesis. Human pre-antral follicles were enzymatically isolated from surplus ovarian tissue obtained from women having ovarian cortical tissue frozen for fertility preservation. A total of 348 human pre-antral follicles, ranging from 40 to 200 µm in diameter, were isolated from ovarian tissue obtained from 15 women, aged 24-34 years. Isolated pre-antral follicles were grouped according to diameter in five size-matched populations spanning the primordial, primary and secondary stage follicles and analysed by whole-genome microarray analysis. Selected proteins/genes were analysed by immunocytochemistry and quantitative RT-PCR. TGF-ß superfamily genes with overall highest mRNA expressions levels included growth differentiation factors 9 (GDF9), BMP15, BMP6, BMP-receptor-2 (BMPR2), anti-Müllerian hormone receptor 2 (AMHR2), TGFßR3, inhibin-α (INHA) and intracellular SMAD3 and SMAD4. Moreover, genes which were differentially expressed from the primordial to the late secondary stage follicles included GDF9, BMP15, AMH, INHBB, TGFßR3, SMAD4 and antagonists Follistatin (FST) and GREM1. Collectively, these data indicate that the active TGF-ß superfamily pathways in early human folliculogenesis consist of primarily GDF9 combined with possible synergistic effects of BMP15 through the BMPR2 and intracellular activation of SMAD3 and SMAD4, and that AMH and INHBB are engaged in intrafollicular events from the onset of follicular growth. Moreover, the presence of multiple TGF-ß/BMP antagonists imply that certain growth factors are subjected to local regulation on different levels that address another important level of intraovarian regulation of follicle development in humans.


Assuntos
Folistatina/genética , Peptídeos e Proteínas de Sinalização Intercelular/genética , Folículo Ovariano/metabolismo , Receptores de Fatores de Crescimento Transformadores beta/genética , Proteínas Smad/genética , Fator de Crescimento Transformador beta/genética , Adulto , Proteína Morfogenética Óssea 15/genética , Proteína Morfogenética Óssea 15/metabolismo , Receptores de Proteínas Morfogenéticas Ósseas Tipo II/genética , Receptores de Proteínas Morfogenéticas Ósseas Tipo II/metabolismo , Feminino , Folistatina/metabolismo , Perfilação da Expressão Gênica , Regulação da Expressão Gênica no Desenvolvimento , Genoma Humano , Estudo de Associação Genômica Ampla , Fator 9 de Diferenciação de Crescimento/genética , Fator 9 de Diferenciação de Crescimento/metabolismo , Humanos , Peptídeos e Proteínas de Sinalização Intercelular/metabolismo , Análise de Sequência com Séries de Oligonucleotídeos , Folículo Ovariano/citologia , Folículo Ovariano/crescimento & desenvolvimento , Receptores de Fatores de Crescimento Transformadores beta/metabolismo , Transdução de Sinais , Proteínas Smad/metabolismo , Fator de Crescimento Transformador beta/metabolismo
6.
Artigo em Inglês | MEDLINE | ID: mdl-38436415

RESUMO

CONTEXT: IGF signalling is known to affect human ovarian follicular function during growth and development. However, the role of the IGF system is unknown during the ovulatory peak, which is characterized by profound changes in granulosa cell (GCs) mitosis and function. OBJECTIVE: How is the IGF system expressed and regulated during the midcycle surge in women? DESIGN: Follicular fluid (FF) and granulosa cells (GCs) were collected during the ovulatory peak from two specific time-points. One sample was obtained before oocyte pick up (OPU): before ovulation trigger (OT) (T = 0 h) or at 12, 17, or 32 h after OT, and one sample was obtained at OPU 36 h after OT. SETTING: University hospital. PATIENTS/PARTICIPANTS: Fifty women undergoing ovarian stimulation were included. MAIN OUTCOME MEASURE: Gene expression profiles were assessed by microarray analysis of GCs. IGF-related proteins in the FF were assessed by using immunoassays or by determination of activity with a proteinase assay. RESULTS: Expression of proteins promoting IGF activity (i.e., IGF2, PAPPA, and IRS1) together with proliferation markers were downregulated on a transcriptional level in GCs after OT, whereas proteins inhibiting the IGF signal (i.e., IGFBPs, IGF2R, and STC1) were upregulated. STC1 gene expression and protein levels were greatly upregulated after OT with a parallel steep downregulation of PAPP-A proteolytic activity. CONCLUSIONS: These data suggest that downregulation of IGF signalling mediated by increased STC1 expression is instrumental for the sudden cessation in GC proliferation and onset of differentiation during the ovulatory peak.

7.
Annu Rev Clin Psychol ; 9: 435-63, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23297786

RESUMO

Several important paradigm shifts have occurred in the field of schizophrenia treatment, including an increased focus on early detection, the development of preemptive interventions, and the view of schizophrenia as a neurodevelopmental disease characterized by decreased efficiency and abnormal connectivity in cortical and subcortical neural networks. In this review, we briefly describe some of the neural impairments that contribute to the development of schizophrenia, with an emphasis on the impact of stress and trauma on cognitively vulnerable neural systems. We then present current data on two behavioral interventions that target these critical risk factors and that aim to preempt the onset of schizophrenia in vulnerable individuals or improve the clinical course in recent-onset schizophrenia: cognitive therapy and computerized cognitive training.


Assuntos
Terapia Cognitivo-Comportamental/métodos , Plasticidade Neuronal/fisiologia , Sintomas Prodrômicos , Psicologia do Esquizofrênico , Humanos , Esquizofrenia/etiologia , Esquizofrenia/fisiopatologia , Esquizofrenia/terapia
8.
Front Behav Neurosci ; 17: 1128586, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37234406

RESUMO

During development, early-life stress (ELS) impairs cognition, learning, and emotional regulation, in part by disrupting neural circuitry in regions underlying these higher-order functions. In addition, our recent work indicates that ELS also alters simple sensory perception: ELS impaired auditory perception and neural encoding of short gaps in sounds, which are essential for vocal communication. The combination of higher-order and basic sensory disruption suggests that ELS is likely to affect both the perception and interpretation of communication signals. We tested this hypothesis by measuring behavioral responses to conspecific vocalizations (those emitted by other gerbils) in ELS and untreated Mongolian gerbils. Because stress effects often differ by sex, we separately examined females and males. To induce ELS, pups were intermittently maternally separated and restrained from post-natal days (P) 9-24, a time window when the auditory cortex is most sensitive to external disruption. We measured the approach responses of juvenile (P31-32) gerbils to two types of conspecific vocalizations: an alarm call, which is emitted to alert other gerbils of a potential threat, and the prosocial contact call, which is emitted near familiar gerbils, especially after separation. Control males, Control females, and ELS females approached a speaker emitting pre-recorded alarm calls, while ELS males avoided this source, suggesting that ELS affects the response to alarm calls in male gerbils. During playback of the pre-recorded contact call, Control females and ELS males avoided the sound source, while Control males neither approached nor avoided, and ELS females approached the sound. These differences cannot be accounted for by changes in locomotion or baseline arousal. However, ELS gerbils slept more during playback, suggesting that ELS may reduce arousal during vocalization playback. Further, male gerbils made more errors than females on a measure of working memory, but the sex difference of cognition in this context may stem from novelty aversion rather than impaired memory. These data indicate that ELS influences behavioral responses to ethologically relevant communication sounds in a sex-specific manner, and are among the first to demonstrate an altered response to auditory stimuli following ELS. Such changes may arise from differences in auditory perception, cognition, or a combination of factors, and suggest that ELS may affect auditory communication in human adolescents.

9.
Psychol Serv ; 2023 Dec 21.
Artigo em Inglês | MEDLINE | ID: mdl-38127500

RESUMO

Coordinated specialty care (CSC) is the dominant model for early psychosis care in the United States, representing a proactive recovery-oriented approach to serious mental illness in its early stages. CSC involves broad multidisciplinary support for participants, including from psychologists in some CSC teams, encompassing educational and vocational support, medication management, psychotherapy, case management, peer support, and family interventions. CSC programs have proliferated in the last 20 years, leading to a quality-access dialectic, where increasing access to treatment simultaneously prompts concerns about care quality, particularly in the context of staffing shortages and funding limits. Evidence-based psychosocial treatment, including psychotherapy, is an integral part of CSC, yet workforce training deficits, workforce turnover, and CSC financing pose threats to intervention fidelity and thus CSC participants' ability to access high-quality care. We propose an enhanced role for psychologists as a way of resolving the quality-access dialectic in the area of psychosocial treatment, specifically evidence-based therapy. We describe the potential of psychologists' skills in clinical supervision, formulation, evidence-based interventions and measurement-based care, drawing on practice examples. After considering possible limitations, we outline implementation models, for example, drawing on Early Psychosis Intervention Network and Project Extension for Community Healthcare Outcomes. We conclude with four recommendations: Psychologists should be placed in CSC team or network-leadership roles; psychological expertise should be made available to CSC teams for training, consultation, and technical assistance; psychological expertise should be used to address CSC implementation challenges; and research is needed to demonstrate psychologists' value to stakeholders. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

10.
J Psychiatr Res ; 161: 213-217, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36934603

RESUMO

Excess synaptic pruning during neurodevelopment has emerged as one of the leading hypotheses on the causal mechanism for schizophrenia. It proposes that excess synaptic elimination occurs during development before the formal onset of illness. Accordingly, synaptic deficits may be observable at all stages of illnesses, including in the early phases. The availability of [11C]UCB-J, the first-in-human in vivo synaptic marker, represents an opportunity for testing this hypothesis with a relatively high level of precision. The first two published [11C]UCB-J schizophrenia studies have documented significant, widespread reductions in binding in chronic patients. The present study tested the hypothesis that reductions are present in early-course patients. 18 subjects completed [11C]UCB-J PET scans, (nine with schizophrenia, average duration of illness of 3.36 years, and nine demographically-matched healthy individuals). We compared binding levels, quantified as non-displaceable specific binding (BPND), in a set of a priori-specified brain regions of interest (ROIs). Eight ROIs (left and right hippocampus, right superior temporal and Heschl's gyrus, left and right putamen, and right caudal and rostral middle frontal gyrus) showed large reductions meeting Bonferroni corrected significant levels, p < 0.0036. Exploratory, atlas-wide analyses confirmed widespread reductions in schizophrenia. We also observed significant positive correlations between binding levels and cognitive performance and a negative correlation with the severity of delusions. These results largely replicate findings from chronic patients, indicating that extensive [11C]UCB-J binding deficits are reliable and reproducible. Moreover, these results add to the growing evidence that excess synaptic pruning is a major disease mechanism for schizophrenia.


Assuntos
Esquizofrenia , Humanos , Esquizofrenia/diagnóstico por imagem , Lobo Temporal/metabolismo , Hipocampo/diagnóstico por imagem , Hipocampo/metabolismo , Encéfalo/diagnóstico por imagem , Encéfalo/metabolismo , Lobo Frontal/metabolismo , Tomografia por Emissão de Pósitrons/métodos , Glicoproteínas de Membrana , Proteínas do Tecido Nervoso/metabolismo
11.
Biol Reprod ; 86(5): 153, 1-14, 2012 May.
Artigo em Inglês | MEDLINE | ID: mdl-22321830

RESUMO

In the ovary, initiation of follicle growth is marked by cuboidalization of flattened granulosa cells (GCs). The regulation and cell biology of this shape change remains poorly understood. We propose that characterization of intercellular junctions and associated proteins is key to identifying as yet unknown regulators of this important transition. As GCs are conventionally described as epithelial cells, this study used mouse ovaries and isolated follicles to investigate epithelial junctional complexes (tight junctions [TJ], adherens junctions [AJ], and desmosomes) and associated molecules, as well as classic epithelial markers, by quantitative PCR and immunofluorescence. These junctions were further characterized using ultrastructural, calcium depletion and biotin tracer studies. Junctions observed by transmission electron microscopy between GCs and between GCs and oocyte were identified as AJs by expression of N-cadherin and nectin 2 and by the lack of TJ and desmosome-associated proteins. Follicles were also permeable to biotin, confirming a lack of functional TJs. Surprisingly, GCs lacked all epithelial markers analyzed, including E-cadherin, cytokeratin 8, and zonula occludens (ZO)-1alpha+. Furthermore, vimentin was expressed by GCs, suggesting a more mesenchymal phenotype. Under calcium-free conditions, small follicles maintained oocyte-GC contact, confirming the importance of calcium-independent nectin at this stage. However, in primary and multilayered follicles, lack of calcium resulted in loss of contact between GCs and oocyte, showing that nectin alone cannot maintain attachment between these two cell types. Lack of classic markers suggests that GCs are not epithelial. Identification of AJs during GC cuboidalization highlights the importance of AJs in regulating initiation of follicle growth.


Assuntos
Moléculas de Adesão Celular/fisiologia , Conexinas/fisiologia , Folículo Ovariano/fisiologia , Junções Aderentes/fisiologia , Junções Aderentes/ultraestrutura , Animais , Cálcio/fisiologia , Moléculas de Adesão Celular/ultraestrutura , Conexinas/ultraestrutura , Células Epiteliais/fisiologia , Células Epiteliais/ultraestrutura , Feminino , Junções Comunicantes/fisiologia , Junções Comunicantes/ultraestrutura , Camundongos , Folículo Ovariano/ultraestrutura , Junções Íntimas/fisiologia , Junções Íntimas/ultraestrutura
12.
Br J Sociol ; 63(3): 513-32, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-22950466

RESUMO

This paper looks beyond the debates that focus on the objectification of the female body to examine the question as to why strip clubs have proliferated and found a permanent place in the night-time economy in the UK. Using empirical qualitative and quantitative data from the largest study into the strip industry in the UK to date, we challenge the common assumption that 'demand' is responsible for the rise in erotic dance. Instead, we argue that the proliferation of strip clubs is largely due to the internal economic structures of the industry which have developed partly in response to the financial crisis beginning in 2008. First, we argue that clubs profit from individual dancers through an exploitative system of fees and fines, rendering a strip club business a low cost investment with high returns and little risk to club owners. Second, we note that the last decade has seen diversification of the industry accompanied by deskilling and devaluing of dancing and dancers' labour. Third, we demonstrate that despite the negative effects of these changes on workers, there has been an expansion of the industry as the ability to make profit, even during a financial crisis was ensured through the transferral of risk to workers. Overall, we suggest that far from proliferating as a response to demand, the industry has maintained its market presence due to its ability to establish highly financially exploitation employment relationships with dancers at a time of economic fragility.


Assuntos
Comércio/economia , Mercantilização , Dança , Profissionais do Sexo , Adolescente , Adulto , Atitude , Comércio/organização & administração , Custos e Análise de Custo , Inglaterra , Feminino , Regulamentação Governamental , Humanos , Pessoa de Meia-Idade , Gestão de Recursos Humanos , Profissionais do Sexo/psicologia
13.
Endocrinology ; 163(12)2022 10 23.
Artigo em Inglês | MEDLINE | ID: mdl-36201606

RESUMO

Follicle-stimulating hormone (FSH) is a key endocrine regulator of ovarian function. FSH is secreted as 2 macroglycosylation variants: partially glycosylated FSH (FSH21/18) and fully glycosylated FSH (FSH24). FSH21/18 is more potent than FSH24 at binding to and activating the FSH receptor (R). The ratio of FSH21/18:FSH24 has been shown to change with age, with FSH21/18 predominant at reproductive prime, and FSH24 predominant during perimenopause/menopause. How these FSH glycosylation variants modulate ovarian follicle functions remains largely unknown. The aim of this study was to investigate the effect of FSH glycosylation variants of pre-antral follicle function. Pre-antral follicles were isolated from 3- to 5-week-old C57BL/6 mice and treated ±10 ng/mL FSH21/18, FSH24, a ratio of 80:20 FSH21/18:FSH24 (to mimic reproductive prime), 50:50 FSH21/18:FSH24 (perimenopause), or 20:80 FSH21/18:FSH24 (menopause) for up to 96 hours. FSH21/18 and 80:20 FSH21/18:FSH24 increased follicle growth, in comparison with control, contrasting with FSH24 and 20:80 FSH21/18:FSH24. Survival rates were decreased in follicles treated with FSH24 or 20:80 FSH21/18:FSH24, with follicles undergoing basement membrane rupture and oocyte extrusion, increased Caspase3 gene and protein expression, and decreased markers of cell proliferation in FSH24 or 20:80 FSH21/18:FSH24-treated follicles. Moreover, this correlated with differential regulation of key genes modulating follicular functions. Pharmacological inhibitors of key FSH signal pathways suggests FSH21/18 and FSH24 initiate different FSHR signal pathway activation, which may determine their differential effects on follicle growth and survival. These data suggest that the nature of FSH glycosylation modulates the follicular cellular environment to regulate follicle growth and survival and may underpin the increasing ovarian resistance to FSH observed during aging.


Assuntos
Hormônio Foliculoestimulante , Receptores do FSH , Feminino , Camundongos , Animais , Hormônio Foliculoestimulante/metabolismo , Receptores do FSH/genética , Receptores do FSH/metabolismo , Glicosilação , Camundongos Endogâmicos C57BL , Folículo Ovariano/metabolismo
14.
J Clin Endocrinol Metab ; 107(8): e3374-e3383, 2022 07 14.
Artigo em Inglês | MEDLINE | ID: mdl-35511085

RESUMO

CONTEXT: The oocyte-secreted factors growth differentiation factor 9 (GDF9) and bone morphogenetic protein 15 (BMP15) play essential roles in follicle development and oocyte maturation, and aberrant regulation might contribute to the pathogenesis of polycystic ovary syndrome. OBJECTIVE: Are there measurable differences in concentrations of GDF9, BMP15, and the GDF9/BMP15 heterodimer in small antral follicle fluids from women with and without polycystic ovaries (PCO)? DESIGN AND SETTING: Follicle fluids (n = 356) were collected from 4- to 11-mm follicles in unstimulated ovaries of 87 women undergoing ovarian tissue cryopreservation for fertility preservation. PATIENTS: Twenty-seven women with PCO were identified and 60 women without PCO-like characteristics (non-PCO women) were matched according to age and follicle size. MAIN OUTCOME MEASURES: Intrafollicular concentrations of GDF9, BMP15, GDF9/BMP15 heterodimer, anti-Mullerian hormone (AMH), inhibin-A and -B, total inhibin, activin-B and -AB, and follistatin were measured using enzyme-linked immunosorbent assays. RESULTS: The detectability of GDF9, BMP15, and the GDF9/BMP15 heterodimer were 100%, 94.4%, and 91.5%, respectively, and concentrations were significantly negatively correlated with increasing follicle size (P < 0.0001). GDF9 was significantly higher in women with PCO (PCO: 4230 ±â€…189 pg/mL [mean ±â€…SEM], n = 188; non-PCO: 3498 ±â€…199 pg/mL, n = 168; P < 0.03), whereas BMP15 was lower in women with PCO (PCO: 431 ±â€…40 pg/mL, n = 125; non-PCO: 573 ±â€…55 pg/mL, n = 109; P = 0.10), leading to a significantly higher GDF9:BMP15 ratio in women with PCO (P < 0.01). Significant positive associations between BMP15 and AMH, activins, and inhibins in non-PCO women switched to negative associations in women with PCO. CONCLUSIONS: Intrafollicular concentrations of GDF9 and BMP15 varied inversely in women with PCO reflecting an aberrant endocrine environment. An increased GDF9:BMP15 ratio may be a new biomarker for PCO.


Assuntos
Proteína Morfogenética Óssea 15 , Líquido Folicular , Fator 9 de Diferenciação de Crescimento , Oócitos , Síndrome do Ovário Policístico , Hormônio Antimülleriano/análise , Hormônio Antimülleriano/metabolismo , Biomarcadores/análise , Biomarcadores/metabolismo , Proteína Morfogenética Óssea 15/análise , Proteína Morfogenética Óssea 15/metabolismo , Feminino , Líquido Folicular/química , Fator 9 de Diferenciação de Crescimento/análise , Fator 9 de Diferenciação de Crescimento/metabolismo , Humanos , Inibinas/metabolismo , Oócitos/metabolismo , Síndrome do Ovário Policístico/diagnóstico , Síndrome do Ovário Policístico/metabolismo , Fator de Crescimento Transformador beta/metabolismo
15.
Nat Cell Biol ; 4 Suppl: s14-8, 2002 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-12479609

RESUMO

By conventional assessments, in vitro fertilization (IVF) is one of the safest medical treatments. But producing new life brings immense responsibilities. Recently, there have been disquieting reports of foetal abnormality after these treatments and here we evaluate the potential risks associated with intracytoplasmic sperm injection (ICSI), embryo freezing and pre-implantation genetic diagnosis. In our opinion, before translating new techniques into practice, more research, particularly in animals,is desirable. In addition, better child follow-up and a fresh approach to regulation are also needed.


Assuntos
Fertilização in vitro , Injeções de Esperma Intracitoplásmicas , Aberrações Cromossômicas , Anormalidades Congênitas/etiologia , Feminino , Humanos , Masculino , Modelos Biológicos , Gravidez , Resultado da Gravidez , Risco
16.
Addict Sci Clin Pract ; 16(1): 34, 2021 05 25.
Artigo em Inglês | MEDLINE | ID: mdl-34034821

RESUMO

BACKGROUND: Obtaining timely access to addiction medicine treatment for patients with substance use disorders is challenging and patients often have to navigate complex referral pathways. This randomized controlled trial examines the effect of providing an expedited pathway to addiction medicine treatment on initial treatment engagement and health care utilization. METHODS: Individuals with possible alcohol or opioid use disorder were recruited from three residential withdrawal management services (WMS). Subjects randomized to the Delayed Intervention (DI) group were given contact information for a nearby addiction medicine clinic; those randomized to the Rapid Intervention (RI) group were given an appointment at the clinic within 2 days and were accompanied to their first appointment. RESULTS: Of the 174 individuals who were screened, 106 were randomized to either the DI or RI group. The two groups were similar in demographics, housing status, and substance use in the last 30 days. In the 6-month period following randomization, 85% of the RI group attended at least one clinic appointment, compared to only 29% in the DI group (p < 0.0001). The RI group had a mean of 6.39 ED visits per subject in the 12 months after randomization, while the DI group had a mean of 13.02 ED visits per subject in the same 12-month period (p = 0.0469). Other health utilization measures did not differ between the two groups. CONCLUSION: Providing immediate facilitated access to an addiction medicine service resulted in greater initial engagement and reduced emergency department visits at 6 months. Trial registration This trial is registered at the National Institutes of Health (ClinicalTrials.gov) under identifier #NCT01934751.


Assuntos
Medicina do Vício , Comportamento Aditivo , Transtornos Relacionados ao Uso de Opioides , Serviço Hospitalar de Emergência , Humanos , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico , Transtornos Relacionados ao Uso de Opioides/epidemiologia , Encaminhamento e Consulta
17.
Psychiatr Serv ; 72(11): 1254-1260, 2021 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-34015942

RESUMO

OBJECTIVE: Psychosis Recovery by Enabling Adult Carers at Home (Psychosis REACH) is a training for families of individuals with psychosis that consists of recovery-oriented psychosis psychoeducation, caregiver self-care, and skills training informed by cognitive-behavioral therapy for psychosis (CBTp). The authors assessed the effects of a 1-day and a 4-day training on the natural supports (i.e., family and other caregivers) of individuals with psychotic disorders. METHODS: Attendees of a 1-day (N=168) and a 4-day (N=29) Psychosis REACH training were surveyed at three timepoints: pretraining, posttraining, and 4-month follow-up. Longitudinal changes across the full sample were evaluated by paired-sample t tests or a one-way repeated-measures analysis of variance (ANOVA). Two-way mixed ANOVAs were conducted with training condition, time, and the training condition × time interactions entered into the model. RESULTS: Reductions were noted in self-perceived depression, anxiety, negative aspects of the caregiving experience, and expressed emotion. Trainees also showed more prosocial attitudes toward psychosis immediately and at 4 months after the training. CONCLUSIONS: This evaluation of the launch of Psychosis REACH in the United States suggests that the training can improve the mental health, attitudinal, and relational outcomes of family and caregivers of individuals with psychosis. Given the dearth of CBTp and family interventions for psychosis in mental health services in the United States, short-term, intensive training that supplements clinical services has intuitive appeal as a means of surmounting the barriers that have plagued family interventions.


Assuntos
Terapia Cognitivo-Comportamental , Serviços de Saúde Mental , Transtornos Psicóticos , Adulto , Cuidadores , Emoções Manifestas , Família , Humanos , Transtornos Psicóticos/terapia
18.
Psychol Serv ; 18(2): 164-169, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-32658514

RESUMO

Individual psychotherapy is routinely offered within coordinated specialty care services for early psychosis. In the United States, 2 primary models have been implemented: cognitive-behavioral therapy for psychosis and individualized resiliency training. However, coordinated specialty care services have typically chosen between these approaches, thus limiting access to the unique aspects of each of the models, missing opportunities related to workforce development, and reducing consumer choice. Opportunities exist for integration of these 2 models. This brief report provides an overview of individualized resiliency training and cognitive-behavioral therapy for psychosis. In addition, elements of synergy between the 2 models are identified and opportunities for an integrated approach highlighted. Further study of the core elements of an integrated approach is required, and guidance for clinicians to support clinical decision making is needed. (PsycInfo Database Record (c) 2021 APA, all rights reserved).


Assuntos
Terapia Cognitivo-Comportamental , Transtornos Psicóticos , Prática Clínica Baseada em Evidências , Humanos , Psicoterapia , Transtornos Psicóticos/terapia , Estados Unidos
19.
Early Interv Psychiatry ; 15(3): 697-704, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-32583602

RESUMO

OBJECTIVE: Cognitive behavioural therapy (CBT) has demonstrated efficacy for treating of psychotic symptoms and is recommended as an evidence-based practice (EBP) in early psychosis services. Despite this recommendation, there is limited information about the feasibility of training community clinicians, working in an early psychosis service, to competence in the delivery of this intervention. METHOD: Fifty clinicians working in an early psychosis service across five programs in Northern California were trained in CBT for psychosis (CBTp) between 2010 and 2014. Following the training, clinicians attended weekly group consultation and submitted taped sessions for review. Tapes were rated for competency using the Cognitive Therapy Scale-Revised (CTS-R). Clinicians who achieved competence were engaged in a train-the-trainer model to support ongoing sustainability of the training program. RESULTS: Data from 40 clinicians were reviewed for achievement of competence. Over the training period 18 clinicians achieved competence while 20 clinicians left the service before achieving competence and 12 were still in the process of achieving competence at the point of data analysis. It took on average 54 weeks (range 17-130 weeks) and an average of six tape reviews (range 3-18) to train clinicians to competency. CONCLUSIONS: Community clinicians working in an early psychosis program can be trained to competence in CBTp following an initial didactic period and ongoing weekly group consultation, although staff turnover hindered implementation. Challenges and opportunities for future implementation in community sites are presented in the context of further expansion of early psychosis services in the United States.


Assuntos
Terapia Cognitivo-Comportamental , Transtornos Psicóticos , Prática Clínica Baseada em Evidências , Estudos de Viabilidade , Humanos , Transtornos Psicóticos/diagnóstico , Transtornos Psicóticos/terapia , Encaminhamento e Consulta
20.
Biomaterials ; 277: 121099, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34537501

RESUMO

Follicle development in the ovary must be tightly regulated to ensure cyclical release of oocytes (ovulation). Disruption of this process is a common cause of infertility, for example via polycystic ovary syndrome (PCOS) and premature ovarian insufficiency (POI). Recent ex vivo studies suggest that follicle growth is mechanically regulated, however, crucially, the actual mechanical properties of the follicle microenvironment have remained unknown. Here we use atomic force microscopy (AFM) spherical probe indentation to map and quantify the mechanical microenvironment in the mouse ovary, at high resolution and across the entire width of the intact (bisected) ovarian interior. Averaging over the entire organ, we find the ovary to be a fairly soft tissue comparable to fat or kidney (mean Young's Modulus 3.3±2.5 kPa). This average, however, conceals substantial spatial variations, with the overall range of tissue stiffnesses from c. 0.5-10 kPa, challenging the concept that a single Young's Modulus can effectively summarize this complex organ. Considering the internal architecture of the ovary, we find that stiffness is low at the edge and centre which are dominated by stromal tissue, and highest in an intermediate zone that is dominated by large developmentally-advanced follicles, confirmed by comparison with immunohistology images. These results suggest that large follicles are mechanically dominant structures in the ovary, contrasting with previous expectations that collagen-rich stroma would dominate. Extending our study to the highest resolutions (c. 5 µm) showed substantial mechanical variations within the larger zones, even over very short (sub-100 µm) lengths, and especially within the stiffer regions of the ovary. Taken together, our results provide a new, physiologically accurate, framework for ovarian biomechanics and follicle tissue engineering.


Assuntos
Folículo Ovariano , Ovário , Animais , Colágeno , Módulo de Elasticidade , Feminino , Camundongos , Microscopia de Força Atômica
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