Objective To analyze the clinical feature of thalassemia with pulmonary hypertension and investigate the influence of pulmonary hypertension on thalassemia.Methods From June 2007 to July 2011,clinical data of 19 patients with thalassemia complicated with pulmonary hypertension in TEDA International Cardiovascular Hospital of Tianjin Medical University and Affilated Hospital of Guilin Medical College were analyzed retrospectively.Twenty-two cases of thalassemia without pulmonary hypertension were as a control group,and follow-up time was set as 4 months to 24 months.Observed indicators included age,hemoglobin(Hb),lactate dehydrogenase (LDH),serum ferritin (SF),tricuspid regurgitation velocity (TRV) and left ventricular ejection fraction (LVEF).Results SF and TRV of the case group[(693.6 ± 234.6)μg/L and (2.6 ± 0.1)m/s] were significantly higher than those of the control [(209.5 ± 100.1) μg/L and (2.1 ± 0.3)m/s,all P ＜ 0.05]; but the differences between case and control group in Hb[(90.8 ± 10.7)g/L vs (89.3 ± 10.5)g/L],LDH[(320.9 ± 103.7)U/L vs (355.8 ± 140.3)U/L] and LVEF[(66.2 ± 7.1)％ vs (64.2 ± 4.7)％] were not statistically significant (all P ＞ 0.05).Logrank analysis showed that the prognosis was poor in patients with thalassemia complicated with pulmonary hypertension (x2 =4.95,P ＜ 0.05).Multiple regression analysis indicated that age and serum ferritin remained as predisposing risk factors for tricuspid regurgitation velocity,and serum ferritin had a greater impact on the velocity.Conclusion In patients with thalassemia complicated with pulmonary hypertension,the prognosis is poor; age and SF may be factors involved in the development of pulmonary hypertension.

BACKGROUND:Effects of different oxygen partial pressures on cytokine secretion of human adipose-derived stem cells have been differently reported. These differences may be caused by varying oxygen partial pressures.
OBJECTIVE:To investigate the influence of different oxygen partial pressures on cytokines secreted from human adipose-derived stem cells.
METHODS:Human adipose-derived stem cells were cultured in vitro and identified by its immunophenotype. Human adipose-derived stem cells were divided into five groups and cultured under different oxygen partial pressure conditions (1%, 3%, 5%, 10%, 21%) for 24 hours, respectively. With quantitative real-time PCR and enzyme linked immunosorbent assay, the secretion of cytokines, vascular endothelial growth factor, hepatocyte growth factor, nerve growth factor, keratinocyte growth factor, from human adipose-derived stem cells were analyzed on the gene and protein levels.
RESULTS AND CONCLUSION:Human adipose-derived stem cells were positive for CD71, CD73, CD90, CD105 and negative for CD34, CD45, CD54, HLA-DR. From the aspect of gene level, hypoxia (1%, 3%O 2 ) promoted the expression of vascular endothelial growth factor and nerve growth factor from human adipose-derived stem cells (P<0.01), and significantly elevated the expression of hepatocyte growth factor (P<0.05);however, there was no significant influence on keratinocyte growth factor under hypoxia (P>0.05). Based on the protein level, protein secretion of hepatocyte growth factor and vascular endothelial growth factor from human adipose-derived stem cells was increased under hypoxia (P<0.01), but no changes occurred in nerve growth factor and keratinocyte growth factor. After cultured under hypoxic environment, human adipose-derived stem cells were promoted to express gene vascular endothelial growth factor, hepatocyte growth factor and nerve growth factor, as wel as to secrete protein keratinocyte growth factor and vascular endothelial growth factor.

BACKGROUND: Our former studies have shown that bone marrow mesenchymal stem cells (BMMSCs) can be induced differentiation to vascular smooth muscle-like cells (VSMLCs) and vascular endothelium-like cells (VELCs), which are compatible with collagen-embedded polyglycolic acid scaffolds. OBJECTIVE: To investigate the possibility of constructing small diameter tissue-engineered blood vessels via subcutaneous implantation. METHODS: The cells-scaffold complex was produced by separately seeding VSMLCs and VELCs derived from BMMSCs on polyglycolic acid collagen scaffolds. The two layers were separated by ECMgel. The cells-scaffold complex was subcutaneous implanted into small diameter tissue-engineered blood vessels.RESULTS AND CONCLUSION: Histological analysis of the small diameter tissue-engineered blood vessel walls revealed a typical artery structure, which was similar to natural vessels. The tissue-engineered blood vessels were not broken down under a force of 26.6 kPa. Eight weeks after implantation, the Brdu-labeled seed cells were found in the three layers of the vessel walls. The results revealed that the subcutaneous tissue was a good bioreactor to construct small diameter tissue-engineered blood vessels.

Objective:To explore the effect of evidence-based nursing best practice in postoperative pain management of neurosurgery patients.Methods:From January to June 2019, a cluster sampling method was used to select 146 neurosurgery patients from Huashan Hospital, Fudan University as the control group. We examined the patient's postoperative pain management status, and applied evidence-based nursing methods to obtain best practice evidence. From July to December 2019, the clinical evidence practice application model of the Australia Joanna Briggs Institute (JBI) Evidence-Based Health Care Center was used to apply evidence to postoperative pain management in neurosurgery patients. From January to June 2020, a cluster sampling method was used to select 146 neurosurgery patients as the observation group for re-examination after the application of evidence. The Modified American Pain Society Patient Outcome Questionnaire (APS-POQ-Modified) was used to investigate the postoperative pain perception beliefs and postoperative pain degree of the two groups of patients. The qualification rate of 146 pain nursing records before and after the application of the evidence was checked and the differences were compared.Results:The scores of 7 items regarding pain perception beliefs in control group were (3.45±1.42) , (3.21±1.21) , (3.58±1.53) , (3.37±1.26) , (3.63±1.34) , (3.55±1.06) , (3.45±1.35) , and those of observation group were (2.44±1.31) , (2.35±1.21) , (2.34±1.35) , (3.06±1.17) , (2.57±1.25) , (3.05±1.02) , (3.12±1.42) , the differences between the two groups were statistically significant ( t=6.346, 6.057, 7.350, 2.166, 6.994, 4.108, 2.027; P<0.05) . In control group, the current pain degree score was (2.34±0.89) , the most severe pain degree score within 24 hours after operation was (4.44±1.17) , and the average pain degree score within 24 hours after operation was (3.21±0.75) , and the scores in observation group were (1.98±0.96) , (3.54±1.10) , (2.46±0.70) , and the differences were statistically significant ( t=3.355, 6.731, 8.808; P<0.01) . The qualification rate of pain nursing record sheet before and after the application of the evidence was 67.12% (98/146) and 82.88% (121/146) respectively, the difference was statistically significant (χ 2=9.662, P=0.002) . Conclusions:The evidence-based nursing best practice can improve neurosurgery patients' pain perception beliefs, reduce the degree of postoperative pain of patients, and increase the qualification rate of nurses' pain nursing records.

Objective To investigate the detailed molecular mechanism of matrix stiffness regulating cell drug resistance. Methods Polyacrylamide hydrogels of soft substrate (10 kPa), hard substrate (38 kPa) and rigid substrate (57 kPa) with different matrix stiffness were configured to simulate the physical matrix stiffness at different stages of breast cancer in vivo. Results The cell proliferation rate of the hard substrate was significantly higher than that of the soft and rigid substrates. The intracellular endocytosis was significantly lower on the hard substrate. The YAP nucleus translocation increased significantly on the hard substrate, compared with the soft and the rigid substrates, indicating that YAP was a key molecule involved in drug resistance of tumor cells. Conclusions Matrix stiffness could regulate the drug resistance of breast cancer cells through YAP activation. This study not only provides a new direction for elucidating the mechanism of drug resistance, but also lays a new foundation for the drug delivery system of breast cancer treatment.