Efficacy of apheresis platelet transfusion in 310 patients with haematological diseases / 中国输血杂志

【Objective】 To observe the effect of platelet transfusion in inpatients with haematological diseases, analyze the possible causes of platelet transfusion refractoriness (PTR), in order to further improve the efficacy of platelet transfusion. 【Methods】 A total of 310 patients with blood disease in our hospital from August 2020 to November 2021 who received platelet transfusion were retrospectively analyzed. Possible influencing factors of platelet transfusion, including gender, age, platelet preservation time, number of platelet transfusions, complication and red blood cell product transfusion were analyzed. 【Results】 Patients were divided into effective group and refractory group according to percentage platelet recovery (PPR) and corrected count increment (CCI). PTR was defined as PPR <20% or CCI <5 000 after two consecutive transfusions in 24 h or clinical bleeding symptoms or tendency not significantly controlled. Statistical differences were noticed between the two groups in terms of gender, pretransfusion white blood cell count, anemia, and whether antibiotics were used (P<0.05). The type of disease, gender, anemia and number of comorbidities were associated with PTR. The incidence of PTR was the highest in patients with myelodysplastic syndrome, and the incidence of PTR was higher in men than in women. Transfusion units of suspended red blood cells and the number of comorbidities were negatively correlated with the transfusion efficacy (P<0.05). 【Conclusion】 Possible influencing factors of platelet transfusion included the level of white blood cells before transfusion, use of antibiotics, anemia and transfusion of red blood cells, number of comorbidities, and type of disease, while no significant differences were found in age, hemolysis, hypersplenism, platelet preservation time, and number of platelet transfusions on transfusion efficacy.

Application effectiveness of PDCA in emergency blood management / 中国输血杂志

【Objective】 To explore the effectiveness of PDCA (Plan-Do-Check-Act Cycle Management) in clinical emergency blood management. 【Methods】 The data of emergency blood-using cases from January 2021 to June 2022 in each clinical department of our hospital were collected to observe the blood matching time, blood retrieving time, and emergency bloodusing rate. They were divided into PDCA experimental group (Experimental group, July to December 2021, n=287), pre-PDCA experimental group (Control group 1, January to June 2021, n=516) and post-PDCA experimental cessation group (Control group 2, January to June 2022, n=277). Subgroup analysis was performed according to different departments, which were Internal Medicine Department, Surgery Depatment, and ICU. The situation of non-emergency blood use occupying emergency lanes in the pre-implementation period was continuously improved using PDCA, and the differences in blood matching time, blood retrieving time, and emergency blood-using rate among the three groups were compared and analyzed by Kruskal-Wallis test and chi-square test. 【Results】 The blood matching time and blood retrieving time (M, min) in the experimental group, control group 1 and control group 2 were 19.00 vs 45.50 vs 23.00 and 22.00 vs 44.00 vs 25.00, respectively (P< 0.05), and were 19.00 vs 47.00 vs 24.00 and 23.00 vs 56.00 vs 30. 50 in Internal Medicine Department, 18.00 vs 57.50 vs 14.00 and 32.00 vs 41.00 vs 24.00 in Surgery Department, 20.00 vs 42.00 vs 23.00 and 16.50 vs 34.00 vs 12.50 in ICU (P<0.05). The rate of emergency blood use in the experimental group, control group 1, and control group 2 were 6.9%(287/4 141) vs 11.0%(516/4 689) vs 6.8%(277/4 089), respectively (P< 0.05), and were 6.3%(175/2 769) vs 11.8% (297/2 512) vs 6.7% (186/2 789) in Internal Medicine Department, 5.9%(24/405) vs 3.6 %(44/1 213) vs 7.4% (37/501) in Surgery Department, and 9.1% (88/967) vs 18% (175/973) vs 6.8%(54/799) in ICU (P<0.05). 【Conclusion】 The adoption of PDCA in Blood Transfusion Department can effectively shorten the blood matching time and blood retrieving time for clinical emergencies and improve the success rate of emergency blood transfusion.

Cardioprotection of orientin against myocardial ischemia reperfusion injury through induction of autophagy / 中国药理学通报

Aim To investigate the role of autophagy in the cardioprotection by orientin and the relative molec-ular mechanisms in cell apoptosis and autophay. Meth-ods The isolated ischemia reperfusion ( I/R ) heart model was built firstly. The Experiments were divided into seven groups:control group, I/R group, different concentrations of orientin-treated group ( 1. 0 mg · kg-1 ,2. 0 mg· kg-1 ,4. 0 mg · kg-1 ) , autophagy in-hibitor group and resveratrol group. Hemodynamic in-dex were recorded by PowerLab, the activities of myo-cardial enzymes were detected through Biochemical an-alyzer, the ultrastructure changes and autophagosomes in myocardial cells were detected by electron microsco-py, the apoptosis was detected by TUNEL, and LC3 and Beclin1 protein levels of left ventricle were meas-ured by Western blot. Results Orientin at middle and high concentrations(2 and 4 mg·kg-1 ) induced auto-phagy shown by increased the number of autophago-somes, LC3-Ⅱ/LC3-Ⅰ ratio and Beclin 1 expression after ischemia-reperfusion. The induction of autophagy by orientin was correlated with enhanced cardiac func-tion and decreased apoptosis. But wortmannin, a kind of autophagy inhibitor, significantly attenuated the ori-entin-induced autophagy and increased apoptosis. Con-clusion The cardioprotection of orientin against myo-cardial ischemia reperfusion injury may be mediated through the inhibition of apoptosis and induction of au-tophagy.

On mitochondrial quality control regulated by Bcl-2 family / 中国药理学通报

Mitochondrial quality control is the important mecha-nism that regulates the morphology,quantity and quality of mito-chondrial in cell to maintain cellular homeostasis and thus,cell survival and health.It has been revealed that members of Bcl-2 family are linked to mitochondrial function and integrity.Bcl-2 family proteins are the key regulators of mitochondrial quality control,participating in the signaling pathways regulating the crosstalk between mitophagy and apoptosis,as well as mitochon-drial fission and fusion.This paper mainly reviews their impact on mitochondrial quality and the major signaling pathways regula-ted by Bcl-2 family proteins.

Research progress on SIRT1-FoxO-autophagy pathway / 中国药理学通报

FoxO as an important transcription factors,can be deacetylated by SIRT1 (a sort of deacetylases),SIRT1-FoxO-au-tophagy pathway is likely to play a vital role in some diseases,e. g.diabetes,aging,obesity,cancer,cardiovascular diseases and muscle atrophy,etcetera.This paper aims to analy transcription-al regulation mechanism of FoxO,and reviews the progress of SIRT1-FoxO-autophagy pathway.

Adenosine alleviates hypoxia-induced rat right ventricular hypertrophy through the NHE-1/CaN signal pathway / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the effect of adenosine and its agonist on hypoxia-induced right ventricular hypertrophy (RVH) and explore the underlying mechanism.</p><p><b>METHODS</b>Fifty-six rats were randomly divided into normoxia group, hypoxia group, and treated hypoxia groups (with different treatments with adenosine, A1 receptor agonist CPA, A2 receptor agonist NECA, CPA plus A1 receptor inhibitor DPCPX, or NECA plus A2B receptor inhibitor MRS1754). The rats except for those in normoxia group were exposed to normobaric chronic hypoxia (9.5%-10.5% oxygen) for 21 days, and the corresponding treatments were administered since the 7th day of hypoxia till day 21 via implantable capsule with a pressure pump. After the treatments, the right ventricles were then removed and weighed for evaluation of hypertrophy, and the expressions of NHE-1 and CnAβ mRNA in the myocardial tissue were detected using RT-PCR.</p><p><b>RESULTS</b>After a 21-day hypoxia, the rats showed significantly increased RV/(LV+S) ratio (0.369∓0.033) and RV/BW ratio (0.75∓0.095) compared to those in normoxia group (0.271∓0.010 and 0.59∓0.039, respectively; P<0.001), adenosine treatment group (0.281∓0.022 and 0.65∓0.077, respectively; P<0.001, P=0.025), hypoxia with CPA group (0.313∓0.021 and 0.66∓0.067, respectively P<0.001), and hypoxia with NECA group(0.333∓0.019, and 0.68∓0.074, respectively P<0.001). The NHE-1 and CnAβ mRNA levels in hypoxia group were significantly higher than those in normoxia group, adenosine treatment group, hypoxia with CPA group, and hypoxia with NECA group(P<0.001).</p><p><b>CONCLUSION</b>Adenosine and its agonist can inhibit hypoxia-induced RVH in rats through the NHE-1/CaN signal pathway.</p>

Protective effects of resveratrol on neonatal rat cardiomyocyte lesion induced by hypoxia / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the effects of resveratrol (Res) on neonatal rat cardiomyocyte lesion induced by hypoxia.</p><p><b>METHOD</b>The cardiomyocyte of neonatal rats were cultured in vitro and the model of cardiomyocyte hypoxia was established. The cardiomyocyte vitalities were determined by MTT assay, the HIF-1alpha expression levels in myocardial cells was detected by immunohistochemical, the activities of peroxidase (GSH-Px) and lactate dehydrogenase (LDH) were measured as well.</p><p><b>RESULT</b>After the administration of hypoxia for 24 hours, the HIF-1alpha expression in myocardial cells was significantly increased. The LDH level in the culture medium was increased from (93.07 +/- 15.84) U x L(-1) to (750.77 +/- 181.51) U x L(-1) (P < 0.01). The intracellular GSH-Px activity was decreased from (46.96 +/- 8.36) U x mL(-1) to (27.13 +/- 4.76) U x mL(-1) (P < 0.05). Res 25, 50 and 75 micromol x L(-1) could dose-dependently inhibit the raising of the HIF-1alpha expression in myocardial cells induced by hypoxia. The LDH activities were decreased dose-dependently to (486.17 +/- 69.97), (189.43 +/- 32.07), (155.34 +/- 29.57) U x L(-1), respectively (P <0.05 or P <0.01). The GSH-Px activities were increased dose-dependently (33.55 +/- 6.34), (37.67 +/- 6.73), (41.44 +/- 7.91) U x mL(-1) (P < 0.05 or P < 0.01).</p><p><b>CONCLUSION</b>Res has a protective effect on neonatal rat cardiomyocyte lesion induced by hypoxia.</p>

Effects of Resveratrol on Neonatal Rat Cardiomyocyte Apoptosis Induced by Hypoxia / 医学研究杂志

Objective To investigate the effect of resveratrol(Res) on neonatal rat cardiomyocyte lesion induced by hypoxia. Methods The cardiomyocytes of neonatal rats were cultured in vitro and the model of cardiomyocytes hypoxia was established. The cardiomyocyte vitalities were determined by MTT assay. The cardiomyocyte apoptosis was detected by Hoechst33258 fluorescent staining. The levels of total antioxidant capacity(T-AOC) and glutathione peroxidase(GSH-Px) were measured as well. Results After the administration of hypoxia for 8, 12, 16 and 24 hours, the cardiomyocyte inhibitory was(22.13?3.22)%, (29.75?0.34)%, (37.43?6.42)% and (45.47?7.32)%, respectively. After the administration of hypoxia for 24 hours, the typical morphologic changes of apoptosis in cardiomyocytes were showed.The intracellular GSH-Px activity decreased from(46.96?8.36)U/ml to(27.13?4.76)U/ml (P

Inhibition of Smilax Glabra Roxb on VCAM-1 Expression Induced by IL-1 of Human Vascular Endothelial Cells / 中国中医药信息杂志

Objective To investigate the protective effect of Smilax Glabra Roxb on the expression of vascular cell adhesion molecule-1 (VCAM-1) induced by IL-1 in human vascular endothelial cells (HUVECs). Methods Take human umbilical vascular endothelial cells as study subject, use immunofluorescence staining, serum pharmacology of the traditional Chinese medicine and flow cytometer. The level of VCAM-1 is represented by the mean fluorescence intensity. Results IL-1 increases the expression of VCAM-1, the expression of VCAM-1 in group of serum containing drugs is lower than control group. Conclusion Smilax Glabra Roxb can inhibit the effect of IL-1 induced increase of VCAM-1 expression in HUVECs.

Effect of Ca~(2+) channel blocker on the levels of myocardial calcineurin A?mRNA in right ventricle and plasma NO,nitric oxide synthase and endothelin-1 in rats with chronic hypoxia / 中国医师杂志

Objective Many studies showed that Ca~(2+) channel blocker could prevent and treat right ventricular hypertrophy(RVH) induced by chronic hypoxia.To further identify the mechanism,we investigated the effect of Ca~(2+) channel blocker on the levels of myocardial calcineurin A?mRNA(CnA?)in RV and plasma nitric oxide(NO),NO synthase and endothelin-1(ET-1) in rats with chronic hypoxia.Methods 30 rats were divided into three groups by randomized block design: treatment group with Amlodipine Besylate ablets [(30 mg?kg~(-1)?d~(-1)),administered via gavage],chronic hypoxia group,and control group.The rats in treatment group and chronic hypoxia group were exposed to normobaric chronic hypoxia [(10.0?0.5)% O_2 ] for 21 days.On the 21st day of experiment,all rats were sacrificed and the hearts were collected for measuring the weight.Blood samples were also drawn from the ventricles for measuring plasma NO,iNOS and ET-1 levels.CnA?mRNA levels in RV were measured by RT-PCR.Results ⑴The RV/(LV+S)、RV/BW ratios were significantly higher in chronic hypoxia group than those of control group and treatment group(P

Blockade of L-type Ca~(2+) channels suppresses activation of calcineurin and development of right ventricle cardiac hypertrophy induced by chronic hypoxia / 中国病理生理杂志

AIM: To study the role of calcineurin in the progression of right ventricle cardiac hypertrophy in the chronic hypoxia rats and examine the effect of Ca 2+ channel blockers on the activation of calcineurin. METHODS: Sixty rats were divided into three groups: treatment group with amlodipine besylate ablets, chronic hypoxia group, normal control group with normal oxygen. The rats in treatment group and chronic hypoxia group were exposed to normobaric chronic hypoxia(10?0 5)% O 2 for 21 days. All hearts were removed immediately after dissection for further investigation. RESULTS: (1)The RV/(LV+S),RV/BW were significantly higher in hypoxia group than that of control group and treatment group( P