Exosomes Derived from Human Amniotic Mesenchymal Stem Cells Facilitate Diabetic Wound Healing by Angiogenesis and Enrich Multiple lncRNAs

BACKGROUND@#Diabetic wound healing remains a major challenge due to the impaired functionality of angiogenesis by persistent hyperglycemia. Mesenchymal stem cell exosomes are appropriate candidates for regulating the formation of angiogenesis in tissue repair and regeneration. Here, we explored the effects of exosomes derived from human amniotic mesenchymal stem cell (hAMSC-Exos) on the biological activities of human umbilical vein endothelial cells (HUVECs) treated with high glucose and on diabetic wound healing and investigate lncRNAs related to angiogenesis in hAMSC-Exos. @*METHODS@#hAMSCs and hAMSC-Exos were isolated and identified by flow cytometry or western blot. A series of functional assays such as cell counting kit-8, scratching, transwell and tube formation assays were performed to evaluate the potential effect of hAMSC-Exos on high glucose-treated HUVECs. The effect of hAMSC-Exos on diabetic wound healing were tested by measuring wound closure rates and immunohistochemical staining of CD31. Subsequently, the lncRNAs profiles in hAMSC-Exos and hAMSCs were examined to screen the lncRNAs related to angiogenesis. @*RESULTS@#The isolated hAMSC-Exos had a size range of 30–150 nm and were positive for CD9, CD63 and CD81. The hAMSC-Exos facilitate the functional properties of high glucose-treated HUVECs including the proliferation, migration and the angiogenic activities as well as wound closure and angiogenesis in diabetic wound. hAMSC-Exos were enriched lncRNAs that related to angiogenesis, including PANTR1, H19, OIP5-AS1 and NR2F1-AS1. @*CONCLUSION@#Our findings demonstrated hAMSC-Exos facilitate diabetic wound healing by angiogenesis and contain several exosomal lncRNAs related to angiogenesis, which may represent a promising strategy for diabetic wound healing.

The clinical significance of procalcitonin and hypersensitive c-reactive protein test in ;early newborn infection / 中国医学装备

Objective:To discuss the clinical significance of procalcitonin(PCT) and hypersensitive c-reactive protein(hs-CRP) test in early newborn infection. Methods:Sixty cases of our hospital treatment confirmed infection early newborn children were selected from June 2007 to July 2007,according to the condition was divided into severe infection group and local infection group, at the same time, 30 cases of our new pediatric infection in early neonatal were chosen as control group, to collect the moderate amount of peripheral blood of three groups before and after the treatment, detected and analyzed the levels of PCT and hs-CRP in the serum, Used Pearson correlation analysis to analysis the correlation of PCT and hs-CRP in the serum. Results: Severe infection group serum PCT, hs CRP levels and positive rate higher than that of local infection group, local infection group of PCT, hs CRP levels and positive rate is higher than the control group, the difference was statistically significant; Infection group before treated with serum PCT and hs-CRP levels and positive rate were higher than after treated(x2=7.248, x2=6.934; P<0.05); Pearson correlation analysis show that, according to the results of PCT and hs-CRP were positively correlated (r=0.533, P<0.533). Conclusion:Procalcitonin and hypersensitive c-reactive protein plays an important role in the infections of early neonatal children, PCT and hs-CRP were positively correlated, it can be used as an important index of early diagnosis of early neonatal infectious diseases.

Dynamic change of PCT,hs-CRP and WBC count in neonatal infection and its clinical significance / 国际检验医学杂志

Objective To investigate the dynamic change of procalcitonin (PCT ) and hypersensitive C‐reactive protein (hs‐CRP) in neonatal infection and its clinical significance .Methods 176 neonates with infection in our hospital from August 2013 to July 2014 were selected and treated by the routine therapy of anti‐infection ,oxygen inhalation ,etc .,and divided into the improvement group(89 cases) ,non‐change group(48 cases) and deterioration group(39 cases) according to the curative effect after 20 d therapy . Serum PCT and hs‐CRP levels were detected before treatment(T0) ,on 5 d(T1) ,10 d(T2) ,15 d(T3) and 20 d(T4) of treatment by adopting the enzyme linked immunosorbent assay(ELISA) .Results The PCT ,hs‐CRP levels and WBC count before treatment had no significant difference among 3 groups(P>0 .05);the PCT and hs‐CRP levels after treatment in the improvement group showed the significantly declining trend ,which reached the lowest at T4 (P0 .05) .In terms of WBC count ,the WBC count in all the cases showed a rising first and then decreasing trend ,the WBC count at T4 in the improvement group was lower than before treatment(P0 .05);the Spearman analysis results after treatment showed that the serum PCT ,hs‐CRP levels and WBC count were negatively correlated with efficacy (r1 = -0 .764 ,P1 <0 .05;r2 = -0 .724 ,P2 <0 .05 ;r3 = -0 .573 ,P3 <0 .05) .Conclu‐sion PCT and hs‐CRP can effectively reflect the therapeutic effect of neonatal infection ,and is closely correlated with the patient′s own immune status ,which can be taken as one of reference indicators for formulating the treatment scheme and evaluating progno‐sis ,and is worth for further clinical promotion .