Osteosarcoma is the most common primary malignant bone tumor, mainly affecting children, young adults, and the elderly. It is an aggressive cancer with a poor prognosis, exhibiting low survival rates ...even with standard treatment. Recently, circular RNA molecules capable of influencing gene expression through various functions, with their main role being acting as microRNA sponges and reducing their intracellular expression, have been identified. Recent studies have linked circular RNAs to osteosarcoma development and progression. Therefore, the present study aimed to investigate the alteration in circular RNA expression during osteosarcoma development and progression.
An integrative literature review was conducted from September 10th to November 12th, 2021, using the following databases: PubMed/MEDLINE, SCOPUS, Web of Science, OVID, and EMBASE. 129 full articles were included in the review. The obtained data were organized using a standardized data collection instrument, which included the following information: altered expression profile of circular RNAs, associated cancer hallmarks, clinical-pathological relationships of circular RNAs, and perspectives on the studied circular RNAs.
A total of 94 distinct circular RNAs were identified, predominantly showing an increased expression pattern. Approximately 91% of the studies that aimed to identify the mechanisms of action of circular RNAs highlighted the function of circular RNAs as microRNA sponges. The most associated cancer hallmarks with the identified circular RNAs were proliferative signaling induction, invasion and metastasis, and resistance to cell death. The altered expression of these circular RNAs generally correlated with a worse prognosis for patients, as evidenced by clinical features such as shorter survival, advanced Enneking and/or TNM stage, higher incidence of metastasis, larger tumor size, and increased chemoresistance.
These findings indicate the significance of circular RNA molecules in osteosarcoma carcinogenesis, suggesting their potential as new prognostic and/or diagnostic biomarkers, as well as alternative therapeutic targets in the fight against osteosarcoma.
The establishment of physical training programs for people living with HIV/AIDS (PLWHA) has several benefits. The study aimed to analyze the effect of resistance training using prediction of ...intensity by subjective perception of effort (SPE) on body composition, muscle strength, and TCD4+ lymphocyte levels in PLWHA. This a randomized controlled trial study. Participants (11 men and 8 women), were divided in two groups: exercise group (EG) and control group (CG). The EG was submitted to 12 weeks of a resistance-training program based in the prediction of intensity by SPE. Body mass percentages were evaluated using tetrapolar bioelectrical impedance and skinfold methods. We used Flow Cytometry to quantify CD4+ T lymphocytes. Patients showed significant changes in Body Fat Percentage (Δ%=-6.23%), Lean Body Mass (Δ%=2.45%), and CD4T lymphocytes levels (Δ%=15.77%). They also showed significant increase in muscular strength presented in the test for one repetition maximum in all the evaluated exercises. Our data suggest that exercising program prescribed by SPE is capable of improving immune function, body composition, and muscular strength in PLWHA.
Full text
Available for:
IZUM, KILJ, NUK, PILJ, PNG, SAZU, UL, UM, UPUK
Chagas disease causes an important impact on cardiorespiratory system, functional and working capacity of the patient. Performing a functional assessment on these individuals becomes essential, since ...the impact of physical limitation is an important factor that is related with other life domains, such as risk of cardiovascular events in a brief period and risk of death. The goal of this work was to perform a literature review to present the evaluative and prognostic value of main valid respiratory and functional tests in patients with Chagas disease, as well as their applicability and reproducibility. A literature search was performed from 1981 to 2020 in Scielo, Pubmed/Medline, Science Direct, Scopus and Web of Science databases. Only complete studies published in English, Portuguese or Spanish were analyzed which specifically discussed the respiratory and functional tests used in patients with Chagas disease. In total, 544 articles were retrieved of which 35 were eligible. The main functional tests approached were Cardiopulmonary Exercise Testing, Incremental Exercise Testing and Six-Minute Walk Test. Several studies show themselves as useful markers for predicting quality of life, mortality and functional impairment, in addition to other patients’ characteristics. Several tests can be used to assess the respiratory and functional impact to patients’ health, as well as its relationship with important domains of their lives.
KEY WORDS: Chagas disease; Chagas cardiomyopathy; exercise test; respiratory function tests; prognosis.
The aim of the present study was to compare pulmonary function among patients with different clinical forms and scores for risk of death and stroke. Patients were recruited from the Chagas Disease ...Ambulatory Service at the University of Rio Grande do Norte State (Mossoro, Brazil). The evaluation of pulmonary function was performed through spirometry techniques using a digital spirometer, and information about the clinical forms (cardiac, cardiodigestive, digestive and undetermined) and scores for risk of death (Rassi's risk-of-death score) and stroke was subsequently collected. Upon completion of the evaluation, comparisons of the values obtained between the groups for different clinical forms, risk stratification of stroke and Rassi's risk-of-death were made. The study cohort consisted of 72 patients. Individuals with a low risk of death had significantly higher values in the Tiffeneau index and individuals with a low risk of stroke presented with higher percentage values for forced vital capacity and forced expiratory volume in 1 sec. In addition, individuals with heart disease had worse percentage values for FVC and FEV.sub.1. In conclusion, the results showed that spirometry was an effective analytical technique and was associated with clinical forms, and death and stroke risk scores, in patients with Chagas disease, adding an important prognostic tool to those currently available.
Full text
Available for:
IZUM, KILJ, NUK, PILJ, PNG, SAZU, UL, UM, UPUK
In addition to respiratory failure, another important outcome presented by patients hospitalized with coronavirus disease 2019 (COVID-19) is renal failure, which is related to increased severity of ...infection and a greater risk of mortality. Severity is often represented by the need for respiratory and/or life support, which can range from oxygen therapy to invasive mechanical ventilation. This study aimed to determine the association between the degree of renal and inflammatory impairment in patients with the need for advanced respiratory support and mortality. Included in the present study were 79 critically ill patients with COVID-19 on different days, who required a nasal cannula and/or orotracheal intubation. Data from laboratory tests, arterial blood gases and information on their clinical evolution were collected. The results obtained showed that the biochemical markers of renal function, as well as the inflammatory markers and the partial pressure of carbon dioxide, were significantly increased in patients who succumbed to the infection. Similarly, these markers were higher amongst patients who required increased respiratory assistance.
Full text
Available for:
IZUM, KILJ, NUK, PILJ, PNG, SAZU, UL, UM, UPUK
PDF
