Exosomes define a local and systemic communication network in healthy pancreas and pancreatic ductal adenocarcinoma.

Pancreatic ductal adenocarcinoma (PDAC), a lethal disease, requires a grasp of its biology for effective therapies. Exosomes, implicated in cancer, are poorly understood in living systems. Here we use the genetically engineered mouse model (ExoBow) to map the spatiotemporal distribution of exosomes from healthy and PDAC pancreas in vivo to determine their biological significance. We show that, within the PDAC microenvironment, cancer cells establish preferential communication routes through exosomes with cancer associated fibroblasts and endothelial cells. The latter being a conserved event in the healthy pancreas. Inhibiting exosomes secretion in both scenarios enhances angiogenesis, underscoring their contribution to vascularization and to cancer. Inter-organ communication is significantly increased in PDAC with specific organs as most frequent targets of exosomes communication occurring in health with the thymus, bone-marrow, brain, and intestines, and in PDAC with the kidneys, lungs and thymus. In sum, we find that exosomes mediate an organized intra- and inter- pancreas communication network with modulatory effects in vivo.

Decoding the Biology of Exosomes in Metastasis.

Metastasis is the leading cause of cancer mortality. Cancer cells must adapt to colonize and thrive at the metastatic site. The modulation of the receptive organ microenvironment is a key event in the adaptation process and is partially accomplished at a distance by the primary tumor. Exosomes, a subclass of extracellular vesicles (EVs), are distal mediators of communication that carry genetic and molecular information to neighboring and distant cells. Cancer exosomes have been involved in restructuring metastatic sites to support cancer cell colonization. In this article, we discuss the role of exosomes in the metastatic process.

Living with CHD: quality of life (QOL) in early adult life.

AIMS: The aim of this study was to assess the quality of life, psychiatric morbidity, and the psychosocial adjustment of adolescents and young adults with CHD, and determine which variables play a role in buffering stress and promoting resilience and which ones have a detrimental effect; and to investigate the situation on school performance and failures, social and family support, physical limitations, and body image of these patients. METHODS: The study enrolled 137 CHD patients (79 male), with age ranging from 12 to 26 years old (M=17.60±3.450 years). The patients were interviewed regarding social support, family educational style, self-image, demographic information, and physical limitations. They responded to questions in a standardised psychiatric interview (SADS-L) and completed self-reported questionnaires for the assessment of quality of life (WHOQOL-BREF) and psychosocial adjustment (YSR/ASR). RESULTS: We found a 19.7% lifetime prevalence of psychopathology in our patients (27.6% in female and 13.9% in male). Of them, 48% had retentions in school (M=1.61 year±0.82). The perception of quality of life in CHD patients is better compared with the Portuguese population in the social relationships and environmental dimensions. However, it is worse in complex forms of CHD than in moderate-to-mild ones, in cyanotic versus acyanotic patients, in moderate-to-severe versus mild residual lesions, in patients submitted versus those not submitted to surgery, in patients with versus without physical limitations, and patients who have need for medication versus those who do not. Social support is very important in improving quality of life of patients in all dimensions as well as academic performance. CONCLUSIONS: Female patients and patients with poor academic performance and poor social support have worse psychosocial adjustment and perception of quality of life.

[Long term psychosocial outcomes of congenital heart disease in adolescents and young adults].

OBJECTIVE: Congenital heart disease (CHD) is a chronic illness with a high frequency in the worldwide population, and is normally diagnosed at birth or in uterus. Because of better conditions in diagnosis and early medical and surgical treatment, patients have survival rates of 90% and go further and further in life, facing different challenges in life cycle. In this study, we tested the effects of different demographic, clinical and psychosocial variables on the perception of quality of life (QOL), on psychosocial adjustment (PSA) and psychiatric morbidity (PM) of adolescents and young adults with CHD. We aimed to evaluate QOL, PM and PSA of adolescents and young adults with CHD and to determine which variables (demographic, clinical, and psychosocial) play a role in buffering stress and promoting resilience and which ones have a detrimental effect. METHODS: The study enrolled 150 CHD patients (87 males and 63 females), 12 to 26 years (17.45±3.373 years). The participants were interviewed regarding social support, family educational style, self-image, demographic information and physical limitations. They responded to questions in a standardized psychiatric interview (SADS-L) and completed self-reports questionnaires for assessment of QOL (WHOQOL-BREF) and PSA (YSR/ASR). RESULTS: We found a 18.7% lifetime prevalence of psychopathology in our participants (25.4% in females and 13.8% in males). 57.1% had retentions in school (1.53±0.804 year). The perception of QOL of CHD patients is better compared to the Portuguese population in the social relationships, environmental, physical and general dimensions. However, it is worse in female CHD patients and patients with poor academic performance and social support as well as in patients with complex or cyanotic CHD, moderate-to-severe residual lesions and physical limitations, and undergoing surgery. All of these variables, except presence of cyanosis, are also associated to a worse PSA. CONCLUSIONS: Female patients and patients with poor academic performance and poor social support refer worse PSA and QOL.

Long term psychosocial outcomes of congenital heart disease (CHD) in adolescents and young adults.

BACKGROUND: Congenital heart disease (CHD) is a chronic illness with a high frequency in the worldwide population, and is normally diagnosed at birth or in uterus. Because of better conditions in diagnosis and early medical and surgical treatment, patients have survival rates of 90% and go further and further in life, facing different challenges in life cycle. In this study, we tested the effects of different demographic, clinical and psychosocial variables on the perception of quality of life (QOL), on psychosocial adjustment (PSA) and psychiatric morbidity (PM) of adolescents and young adults with CHD. OBJECTIVES: We aimed to evaluate QOL, PM and PSA of adolescents and young adults with CHD and to determine which variables (demographic, clinical, and psychosocial) play a role in buffering stress and promoting resilience and which ones have a detrimental effect. METHODS: The study enrolled 150 CHD patients (87 males and 63 females), 12 to 26 years (M: 17.45±3.373 years). The participants were interviewed regarding social support, family educational style, self-image, demographic information and physical limitations. They responded to questions in a standardized psychiatric interview (SADS-L) and completed self-reports questionnaires for assessment of QOL (WHOQOL-BREF) and PSA (YSR/ASR). RESULTS: We found an 18.7% lifetime prevalence of psychopathology in our participants (25.4% in females and 13.8% in males). 57.1% had retentions in school (M: 1.53±0.804 year). The perception of QOL of CHD patients is better compared to the Portuguese population in the Social Relationships, Environmental, Physical and General Dimensions. However, it is worse in complex forms of CHD, in cyanotic patients, in moderate-to-severe residual lesions, in patients submitted to surgery and in patients with physical limitations. All of these variables, except presence of cyanosis, are also associated to a worse PSA. Social Support is very important in improving QOL of patients in all dimensions as well as academic performance. CONCLUSIONS: Female patients and patients with poor academic performance and poor social support refer worse PSA and QOL.