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[This corrects the article DOI: 10.3389/fphys.2018.01273.].
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Integrins are heterodimers anchoring cells to the surrounding extracellular matrix (ECM), an active and complex process mediating a series of inside-out and outside-in stimuli regulating cellular turn-over, tissue growth and architecture. Itgb1 is the main subunit of the renal integrins and it is critical for renal development. This study aims to investigate the role of Itgb1 in the adult renal epithelial cells by knocking down Itgb1 in PAX8 expressing cells. Itgb1-Pax8 cKO mice develop a progressively worsening proteinuria and renal abnormalities leading to severe renal failure and hypertension. This phenotype is also associated with severe dysfunction of distal nephron and polyuria. To further investigate whether distal nephron involvement was primarily related to Itgb1 suppression or secondary to renal failure, an Itgb1-AQP2 cKO mouse model was generated. These mice lack Itgb1 expression in AQP2 expressing cells. They do not show any developmental alteration, but 1 month old mice are resistant to dDAVP administration and finally, at 2 months of age, they develop overt polyuria. This phenotype is due to primary collecting duct (CD) cells anoikis. The entire architecture of the outer medulla is altered, with loss of the typical organization pattern of vascular and tubular bundles alternation. Indeed, even though not primarily affected by genetic ablation, the TAL is secondarily affected in this model. It is sufficient to suppress Itgb1 expression in the CD in order to stimulate proliferation and then disappearance of neighboring TAL cells. This study shows that cell to cell interaction through the ECM is critical for architecture and function maintenance of the outer medulla and that Itgb1 is crucial for this process.
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The aim of the present study was to evaluate in a non-clinical sample of undergraduate women, the relationships between alexithymia, body checking and body image, identifying predictive factors associated with the possible risk of developing an Eating Disorder (ED). The Toronto Alexithymia Scale (TAS-20), Body Checking Questionnaire (BCQ), Eating Attitudes Test (EAT-26), Body Shape Questionnaire (BSQ), Interaction Anxiousness Scale (IAS), Rosenberg Self-Esteem Scale (RSES) and the Beck Depression Inventory (BDI) were completed by 254 undergraduate females. We found that alexithymics had more consistent body checking behaviors and higher body dissatisfaction than nonalexithymics. In addition, alexithymics also reported a higher potential risk for ED (higher scores on EAT-26) when compared to nonalexithymics. Difficulty in identifying and describing feelings subscales of TAS-20, Overall appearance and Specific Body Parts subscales of BCQ as well as lower self-esteem was associated with higher ED risk in a linear regression analysis. Thus, a combination of alexithymia, low self-esteem, body checking behaviors and body dissatisfaction may be a risk factor for symptoms of ED at least in a non-clinical sample of university women.
Asunto(s)
Síntomas Afectivos/psicología , Atención , Imagen Corporal , Trastornos de Alimentación y de la Ingestión de Alimentos/psicología , Adolescente , Adulto , Síntomas Afectivos/diagnóstico , Índice de Masa Corporal , Depresión/diagnóstico , Depresión/psicología , Trastornos de Alimentación y de la Ingestión de Alimentos/diagnóstico , Femenino , Humanos , Inventario de Personalidad/estadística & datos numéricos , Trastornos Fóbicos/diagnóstico , Trastornos Fóbicos/psicología , Psicometría , Factores de Riesgo , Autoimagen , Estadística como Asunto , Estudiantes/psicología , Encuestas y CuestionariosRESUMEN
BACKGROUND: To evaluate alexithymia and body image in women with Premenstrual Dysphoric Disorder and test whether alexithymic traits influence severity of Premenstrual Dysphoric Disorder or body distress. METHODS: Sixty-four consecutive women with a DSM-IV diagnosis of Premenstrual Dysphoric Disorder and age range of 18-45 were recruited. Alexithymia was measured with the Italian version 20-items Toronto Alexithymia Scale. Severity of premenstrual mood symptoms was measured through the use of Visual Analogue Scales. Body concerns were assessed with the Body Uneasiness Test, Body Shape Questionnaire and Body Attitude Test. Additional measures were Rosenberg Self-Esteem Scale and Sheehan Disability Scale. RESULTS: Prevalence of alexithymia in our sample was 31.3% (n=20). Alexithymics showed higher scores on all rating scales (p range 0.001-< 0.001). Difficulty in Identifying Feelings and Difficulty in Describing Feelings subscales of Toronto Alexithymia Scale were predictors of severity of Premenstrual Dysphoric Disorder in the multiple linear regression analysis. CONCLUSIONS: Alexithymia was associated with more severe Premenstrual Dysphoric Disorder. Alexithymic women with Premenstrual Dysphoric Disorder exhibited significantly poorer appearance evaluation and body satisfaction than non-alexithymic women.