Effect of propyl gallate on activity of cyclooxygenase 1 and 2 in mice??s peritoneal macrophages

Objective: To investigate the effect of Red Peony 801 (propyl gallate,PrG) on cyclooxygenase (COX) activity in murine peritoneal macrophages.Methods: A screening model for COX inhibitors in vitro based on murine peritoneal macrophages was used. COX-1 activity was reflected by the level of 6-ketoprostaglandin F_1α(6-keto-PGF_1α) in supernatants of cultured macrophages which were stimulated with calcium ionophore A23187 for a short-term, while COX-2 activity was reflected by the level of prostaglandin E₂ (PGE₂) in supernatants of cultured macrophages which were stimulated with lipopolysaccharide (LPS) for a long-term.Results: PrG did not affect A23187-induced, COX-1-derived 6-keto-PGF_1α synthesis at the concentrations of 1 × 10^-6, 5 × 10^-6 mol/L (P>0.05), but enhanced 6-keto-PGF_1α synthesis at the concentrations of 1 × 10^-6, 5 × 10^-7, 1 × 10^-7 mol/L (P<0.01) in vitro, and showed a good dose-dependent manner. It inhibited LPS-induced, COX-2-derived PGE₂ synthesis at the concentrations of 1 × 10^-6, 1 × 10^-6 mol/L (P< 0.05).Conclusion: Within the range of 1 × 10^-5 to 1 × 10^-7 mol/L, PrG activated COX-1 at lower concentrations and inhibited COX-2 at higher concentrations in murine peritoneal macrophages. This work is supported by the National Natural Science Foundation (item number: 90209054)     

Effects of ligustrazine controlled release capsule in chronic pulmonary heart disease

Summary Before and after oral administration of ligustrazine controlled release capsule, pulmonary hemodynamics, right cardiac function, arterial blood gas and TXB₂/6-keto-PGF_1α were studied in 16 patients with advanced cor pulmonale. The decrease of pulmonary arterial pressure and pulmonary vascular resistance, increase of cardiac output, improvement of right cardiac function and arterial blood gas were demonstrated after one course of treatment. The mechanism of these effects may be related to improvement of imbalance of TXB₂/6-keto-PGF_1α. These results were in agreement with those of intravenous administration of ligustrazine, but no adverse reactions were found.     

Studies on IUD-induced menorrhagia and increased synthesis of prostacyclin in endometrium

Summary 43 samples of endometrium from IUD-users with excessive uterine bleeding (MBL>80 ml), normal menstrual blood loss (MBL< 80 ml) and non-IUD-users with normal menstrual blood loss (< 80 ml) have been studied. Concentration of 6-keto-PGF_1α, a metabolite of prostacyclin (PGI₂), was determined by radioimmunoassay. It was found that the concentration of 6-keto-PGF_1α of patients with IUD-induced excessive uterine bleeding was significantly higher than that of IUD-users with MBL less than 80 ml (P<0.05) and of non-IUD-users (P<0.01). But the difference between IUD-users with normal menstruation and the control was of no statistical significance (P>0.05). The results also indicated a positive correlation between the amount of MBL and 6-keto-PGF_1α concentration in endometrium of IUD-users (r = 0.439;P<0.05). The measurements of both tissue plasminogen. activator (t-PA) and 6-keto-PGI_1α concentrations from samples of 28 cases showed a weak positive correlation between t-PA and 6-keto-PGF_1α (r = 0.459;P<0.05). Further study is necessary to evaluate the significance of this result. In summary, our studies prove that the increased 6-keto-PGF_1α is an important factor contributing to excessive uterine bleeding in IUD-users.     

Clinical implication of the changes of cAMP,TXA<Subscript>2</Subscript> and PGI<Subscript>2</Subscript> in CSF of asphyxiated newborns

Summary To evaluate the changes of 3′, 5′-cyclic adenosine monophosphate (cAMP), thromboxane A₂(TXA₂) and prostacyclin (PGI₂) in cerebrospinal fluid (CSF) in the asphyxiated newborn and explore their roles in hypoxic-ischamic brain damage (HIBD). Thirty-six full term newborns were divided into 3 groups, including 12 with moderate-severe hypoxic-ischaemic encephalopathy (HIE), 13 with mild HIE, 11 without HIE (control group). The levels of cAMP, TXB₂ (TXA₂ metabolite) and 6-keto-PGF_1α (PGI₂ metabolite) in CSF and plasma were measured 36–72 h after birth by RIA, and the concentrations were expressed as nM/L (cAMP), ng/L(TXB₂ and 6-keto-PGF_1α). The infants were followed-up at 6 and 12 month of age and Mental Development Index (MDI) and Psychomotor Development Index (PDI) were measured using Bayley Scales of Infant Development (BSID). The CSF cAMP level in moderate-severe HIE group was 8.60±2.40, significantly lower than that of the mild HIE group (14.83±2.84) and the control group (24.43±2.39) (for bothP<0.01). The levels of TXB₂ and 6-keto-PGF_1α in CFS in the moderate-severe HIE group (206.06±29.74, 168.47±23.02, respectively) were significantly higher than in the mild HIE group (83.37±28.57, 131.42±16.57, respectively,P<0.01) and the control group (41.77±21.58, 86.23±13.05, respectively,P<0.01). The level changes of cAMP, TXB₂ and 6-keto-PGF_1α in plasma in all groups were similar to those in CSF, but no significant difference was found between mild HIE group and the control group (P>0.05). The follow-up results showed that MDI and PDI of the moderate-severe HIE group were the lowest (84.79±13.34, 83.50±13.28, respectively), followed by mild HIE group (102.19±7.02, 99.94±9.08, respectively), with the control group being the highest (116.63±12.08, 116.69±10.87, respectively). Univariate analysis showed some significant difference (the moderate-severe HIE group vs. the mild HIE group or the control group,P<0.01; the mild HIE group vs. the control groupP<0.05). The results suggested that the concentration of cAMP, TXA₂ and T/K ratio in CSF after neonatal asphyxia might be sensitive markers in evaluating the severity of brain damage in early stage and predicting the future outcome. LIU Hanchu, male, born in 1959, Associate Professor     

Effect of buyang huanwu decoction on plasma thromboxane b2, 6-keto-prostaglandin f1α, endothelin and calcitonin gene related peptide in primary nephrotic syndrome patients

Objective: To explore the mechanism of Buyang Huanwu Decoction (BYHWD) in treating primary nephrotic syndrome (PNS).Methods: Based on the treatment of prednisone acetate and cytoxan, two groups of PNS patients were treated with aspirin and persantin (western medicine group, WM, 35 patients) and BYHWD plus WM (TCM-WM group, 35 patients) respectively. The effect on anticoagulation was observed and compared. Plasma levels of thromboxane B₂ (TXB₂ ), 6-keto-prostaglandin F_1α (6-K-PGF_1α), endothelin (ET), calcitonin gene related peptide (CGRP) were determined before and after treatment, at the reducing dose and shifting to maintenance dose of prednisone. The therapeutic effect of the two groups were also observed. Another group of 30 healthy subjects was established for control.Results: The differences of TXB₂, 6-K-PGF_1α, ET and CGRP between patients and healthy subjects were very significant before treatment (P < 0. 001). The above-mentioned 4 parameters improved synchronously with the clinical improvement in the therapeutic course and they were better in the TCM-WM group than those in the WM group (P < 0.001 ), and the complete remission rate of the former group was also higher than that of the latter (62.9 % vs 37.1 %, χ² = 4.63, P < 0.05).Conclusion: BHD could improve the therapeutic effect in treating PNS through the mechanism of improving TXB₂, 6-K-PGF_1α, ET and CGRP levels.     

Glioma prostaglandin levels correlate with brain edema

Summary The present study was designed to prospectively investigated the prostaglandin (PG) levels and extent of peritumoral edema in 30 cases of glioma by using methods of radioimmunoassay and imaging. Both TXB₂ and 6-keto-PGF₁₀ levels in all glioma groups went up over that in the control group. TXB₂ level and ratio of TXB₂/6-keto-PGF₁₀ were markedly increased with the extent of tumor malignancy. Water concentration in anaplastic astrocytoma and glioblastoma were significantly elevated. Difference in TXB₂ level and TXB₂/6-keto-PGF₁₀ ratio among three edema grades were statistically significant. TXB₂ level and ratio of TXB₂/6-keto-PGF₁₀ were closely correlated with water concentration (r₁ = 0. 53, r₂ = 0. 72,P <0. 01). Our findings suggested that the metabolism of PG in glioma were in the state of disorder, and that the imbalance between PGI₂ and TXA₂ may be one of factors which affect the formation of peritumoral edema.     

Clinical observation on treatment of pediatric intractable nephropathy with modified Taohong Siwu decoction ()

Objective: To observe the clinical effect of Modified Taohong Siwu Decoction (MTSD) in treating pediatric intractable nephropathy (PIN).Methods: Ninety-five patients with PIN were divided into 2 groups at random. The 60 patients in the treated group were treated with MTSD and the 35 patients in the control group were treated with heparin. The clinical therapeutic effect and levels of thromboxane B₂(TXB₂) and 6-keto-prostacyclin F_la(6-keto-PGF_la) before and after treatment were observed. Results: The total effective rate in the treated group was 81.7%, which was similar to that in the control group (80.0%,P > 0.05). The levels of TXB₂ and TXB₂/6-keto-PGF_la ratio were higher in both groups of the patients as compared with those of the healthy control (P<0.01). After treatment, the two criteria were significantly improved in the two treated groups, as compared with those before treatment, the difference was significant (P<0.01), while in comparison between the MTSD treated group and the control group, no significant difference was found (P >0. 05).Conclusion: MTSD has good effect in treating PIN, it could improve the metabolic unbalance of thromboxane and prostacyclin.     

Effect of tongbiling on the synoviocyte function in adjuvant arthritis rats

Objective: To study the effect of Tongbiling (TBL) on the proliferation of synovial fibroblast and interleukin-1 (IL-1), tumor necrosis factor-α (TNF-α) and prostaglandin E₂(PGE₂) secreted by synoviocytes in adjuvant arthritis (AA) rats.Methods: Synovial fibroblast was derived from culture of tissue piece. The effect of primary synoviocyte culture supernatants on the fibroblast proliferation were assayed and IL-1, TNF-α bioactivity and PGE₂ content of supernatants of cultured synoviocytes were measured.Results: TBL could significantly inhibit the synovial fibroblast proliferation (P < 0.001), and down-regulate IL-1, TNF-α and PGE₂ productions (P < 0. 001); indomethacin could obviously promote the synovial fibroblast proliferation (P < 0.001). It significantly inhibited PGE₂ production, but further up-regulated IL-1 and TNF-α secreted by synoviocytes (P<0.01).Conclusion: The therapeutical effect of TBL on AA might be associated with its down-regulating the secretory function of synoviocyte, then restoring the abnormal proliferation of fibroblast to normal levels. This program was supported by the Nature Science Foundation of Guangdong Province (No. 960550)     

Clinical study on the treatment of premature ejaculation by Uighur medicine Gu-jing-mai-si-ha Tablet (固精麦斯哈片)

Objective:To observe the effect of Uighur medicine Gu-jing-mai-si-ha Tablet (固精麦斯哈片,GJMSHT) for treatment of premature ejaculation (PE) and to explore part of its mechanism. Methods:The condition of patients was scored by related questionnaire,and the intravaginal ejaculation latency time (IELT) was observed before and after GJMSHT treatment,with the blood levels of nitric oxide (NO) and prostaglandin F_(2α)(PGF_(2α)) detected in PE patients as well.The results were compared with those in the control group.Results:After treatment,the scores of PE and IELT,as well as the levels of NO and PGF_(2α) all increased significantly compared to those before treatment in the treated group (P<0.01),while in the control group,all the parameters were insignificantly changed (P>0.05). Therefore,the difference of these parameters between the two groups after treatment all showed statistical significance (P<0.01).Conclusion:GJMSHT could treat PE effectively,its mechanism is possibly by strengthening the coordination of the related smooth muscles through increasing the blood levels of NO and PGF(2α),and the endurance of patients to the cavitary effect of prostatico-urethral pressure,thus postponing the arrival of urgent ejaculatory feeling.     

Relation of TXA2 and PGI2 to the difference in hypoxic pulmonary vasoconstriction between different strains of rats

TXB₂ and 6-keto-PGF₁ α levels in arterial and venous plasma of Wistar and Hilltop rats during hypoxia were measured to investigate the roles of TXA₂ and PGI₂ in hypoxic pulmonary vasoconstriction (HPV) and responsiveness difference of pulmonary vessels to hypoxia between different strains of rats. The results showed that PGI₂ might play an important role in maintaining the low resistance in pulmonary circulation of these two strains of rats. Increased TXA₂ during hypoxia may partially mediate HPV in Wistar rats, while augmented PGI₂ during hypoxia may modulate HPV in Wistar rats. This might be the important mechanism responsible for more intensive responsiveness of pulmonary vessels to hypoxia in Hilltop rats than in Wistar rats.     

Experimental study of Yishou Tiaozhi tablet() on inhibiting hyperlipemia and atherosclerosis) on inhibiting hyperlipemia and atherosclerosis

Objective: To observe the effect of Yishou Tiaozhi tablet(YSTZT) on lipid metabolism and aortic intimal atherosclerotic plaque coverage in rabbit model of experimental hyperlipemia and atherosclerosis.Methods: Thirty-two rabbits were randomly divided into four groups, Group A, B, C and D, 8 in each group. Forage with cholesterol and lipid plus 1.59 g/kg of YSTZT was fed to Group A every day; for Group B, 22.54 mg/kg gypenoside tablet was added to forage with cholesterol and lipid; for Group C, hyperlipid forage was given and for Group D, only ordinary forage was given. Biochemical parameters were measured and pathomorpho-logical examinations were carried out 6 weeks later.Results: (1) YSTZT obviously lowered the levels of serum total cholesterol(TC), triglyceride(TG), atherosclerotic index(AI), apoprotein(ApoB), lipoprotein [Lp(a)], oxygen-low density lipoprotein cholesterol (ox-LDL), hydroxyproline(HYP), plasma Ca²⁺, thromboxane B₂ (TXB₂), and increased the levels of serum high-density lipoprotein cholesterol(HDL-C), apoprotein A₁ (Apo A₁), ApoA₁/ApoB, plasma 6-keto-PGF_lα (P < 0.01). (2) Pathomorphological examination showed that in Group A aortic intimal atherosclerotic plaque area and arterial intima thickness were obviously reduced, smooth muscle cell hyperplasia and elastic fibers were not seen.Conclusion: YSTZT can inhibit experimental hyperlipemia and atherogenesis. It is an ideal and effective medicine in preventing and treating hyperlipemia and atherosclerosis.     

Changes of TXA_2 and PGI_2 during Postoperative Hypertensive Crisis in Patients with Hypertensive Intracerebral Hemorrhage

In order to explore the changes and the roles of TXA2 and PGI2 during postoperative hypertensive crisis in patients with hypertensive intracerebral hemorrhage, 31 cases subject to crani-otomy were divided into three groups: group A, 9 patients with postoperative hypertensive crisis; group B, 13 patients without postoperative hypertensive crisis; and group C, 9 patients without his-tory of hypertension and hypertensive intracerebral hemorrhage. TXA2, TXB2, 6-keto-PGF1α and PGI2 were measured after operation in the three groups respectively. The postoperative blood pres-sure in group A, including SBP and DBP, was elevated more obviously than that in the other two groups. TXA2 and PGI2 in group A were significantly higher than those in other two groups (P<0.01). Moreover, the ratio of TXB2 to 6-keto-PGF1α in group A was significantly higher than that in other two groups (P<0.05). The increase of TXA2 and the relative inadequacy of prostacyclin, especially 6-keto-PGF1α, may play roles in the postoperative hypertensive crisis. And the increased value of TXB2 to 6-keto-PGF1α could provide the basis for diagnosis of postoperative hypertensive crisis.     

Therapeutic mechanism of Santeng Dingtong recipe on monosodium urate crystal-induced rabbit arthritis

Objective: To study the therapeutic mechanism of Santeng Dingtong recipe (STDT) on monosodium urate crystal (MSU) induced rabbit arthritis.Methods: Forty-two rabbits were randomly divided into six groups, 7 in each group. Group 1 received 0.9% saline 2.5 ml/kg per day by gastrogavage (ig) for 10 days; Group 2, 3 and 4 received STDT 0.125 g/kg, 1.0 g/kg and 8.0 g/kg per day respectively by ig for 10 days; Group 5 received colchicine 4.5 mg/kg per day by ig for 4 days; and Group 6 was untreated. MSU crystals 10 mg /500 μl containing polymyxin B 10 u/ml was injected into the knee joints of Group 1–5 to make rabbit arthritis models. Leukocytes in synovial lavage fluids was then counted and differentiated; pathological injury of synovial membranes was observed under HE staining; interleukin-1 beta (IL-l_β), tumor necrosis factor alpha (TNF_α) and leukotriene B4 (LTB₄) content in synovial lavage fluids were determined by ELISA.Results: MSU caused a rapid leukocyte infiltration and increased production of IL-l_β, TNF_α and LTB₄ 2 hrs after intra-articular injection. STDT inhibited neutrophil infiltration in synovial fluids dose-dependently, protected the synovial membrane against pathological injury and reduced the production of IL-l_β, TNF_α and LTB₄; while colchicine did not decrease the level of TNF_α, but significantly inhibited neutrophil infiltration in synovial fluid and reduced the production of IL-11_β and LTB₄.Conclusion: STDT exerts an anti-inflammatory effect in rabbit model of acute MSU arthritis, its mechanism being probably due to the decrease of IL-1_β, TNF_α and LTB₄ synthesis. This program was supported by the National New Drugs Foundation (No.98-35-N-13)     

Effects of cigarette smoking on the function of metabolizing arachidonic acid and angiotensin I in the isolated perfused rat lungs

Summary The effects of acute and chronic cigarette smoking on the metabolism of exogenous arachidonic acid (AA) and angiotensin I (AI) in perfused isolated rat lungs were studied. The results showed that acute cigarette smoking did not alter the contents of 6-keto-PGF_1α (the stable metabolite of PGI₂) and TXB₂ (the stable metabolite of TXA₂) in the effluent and the increment of pulmonary artery pressure (†P_pa) caused by AA. The conversion of A I into A II was significantly increased (P<0.01), while the †P_{p a}, induced by A I injection was obviously decreased as compared with controls (P<0.05). After cigarette smoke exposure for 30 days, the †P_{p a} caused by AA or A I did, not differ from that of controls, but the contents of 6-ketoPGF_1α and A II increased more markedly than those in non-smoking rats,(P< 0.05). It is suggested that acute and chronic cigarette smoking in rats can promote the lung function of converting A I into A II, chronic smoking can increase the lung function of metabolizing AA into PGI₂.     

烟酸对大鼠急性坏死性胰腺炎合并肺损伤的防治作用

采用牛磺胆酸钠诱发大鼠急性坏死性胰腺炎并发肺损伤模型,用放射免疫分析法动态测定大鼠血浆TXB₂、6-keto-PGF_1α质量浓度变化,并观察烟酸的防治作用.结果显示,急性坏死性胰腺炎组血浆TXB₂质量浓度升高,TXB₂/6-keto-PGF_1α显着升高,应用烟酸能明显降低TXB₂质量浓度,TXB₂/6-keto-PGF_1α比值显着降低,也降低了肺系数,改善肺组织病理形态变化.提示TXB₂、PGI₂平衡改变可能是急性坏死性胰腺炎并发肺损伤的病理机制之一,烟酸具有防治急性坏死性胰腺炎并发肺损伤的作用.     

Inhibitory effects of chlorpheniramine and astemizolum on contraction of isolated rat and rabbit uteri induced by oxytocin and PGF2α

Summary The contraction of isolated rat and rabbit uteri induced by oxytocin and PGF_2α was markedly inhibited by chlorpheniramine (Chl) and astemizolum (Ast), both of which also decreased the resting tension of uteri, and their spontaneous contraction. The inhibitory effects of both drugs were dose-dependent. At high concentrations, Chl 7.4× 10^-4 mol/L and Ast 10^-4 mol/L could counteract the contraction of the uteri induced by Oxy and PGF_2α, and their spontaneous contraction as well. They decreased the resting tension to the lower level. The mechanism of their non-special relaxed action on uteri could not be completely explained only by their H₁-receptor blocking action. Whether they act by blocking calcium channel or by inhibiting calmodulin (CaM) remains to be further explored.     

All-trans retinoic acid diminishes collagen production in a hepatic stellate cell line via suppression of active protein-1 and c-Jun N-terminal kinase signal

Following acute and chronic liver injury,hepatic stellate cells (HSCs) become activated to undergo a phenotypic transformation into myofibroblast-like cells and lose their retinol content,but the mechanisms of retinoid loss and its potential roles in HSCs activation and liver fibrosis are not understood.The influence of retinoids on HSCs and hepatic fibrosis remains controversial.The purpose of this study was to evaluate the effects of all-trans retinoid acid (ATRA) on cell proliferation,mRNA expression of collagen genes [procollagen α1 (Ⅰ),procollagen α1 (Ⅲ)],profibrogenic genes (TGF-β 1,CTGF,MMP-2,TIMP-1,TIMP-2,PAI-1),fibrolytic genes (MMP-3,MMP-13) and the upstream element (JNK and AP-1) in the rat hepatic stellate cell line (CFSC-2G).Cell proliferation was evaluated by measuring BrdU incorporation.The mRNA expression levels of collagen genes [procollagen α1 (Ⅰ),procollagen α1 (Ⅲ)],profibrogenic genes (TGF-β 1,CTGF,MMP-2,TIMP-1,TIMP-2,PAI-1),and fibrolytic genes (MMP-3,MMP-13) were quantitatively detected by using real-time PCR.The mRNA expression of JNK and AP-1 was quantified by RT-PCR.The results showed that ATRA inhibited HSCs proliferation and diminished the mRNA expression of collagen genes [procollagen α1 (Ⅰ),procollagen α1 (Ⅲ)] and profibrogenic genes (TGF-β 1,CTGF,MMP-2,TIMP-1,TIMP-2,PAI-1),and significantly stimulated the mRNA expression of MMP-3 and MMP-13 in HSCs by suppressing the mRNA expression of JNK and AP-1.These findings suggested that ATRA could inhibit proliferation and collagen production of HSCs via the suppression of active protein-1 and c-Jun N-terminal kinase signal,then decrease the mRNAs expression of profibrogenic genes (TGF-β 1,CTGF,MMP-2,TIMP-1,TIMP-2,PAI-1),and significantly induce the mRNA expression of MMP-3 and MMP-13.     

Effect of IL-Iβ and TNF-α on the expression of monocyte chemotactic protein-1 in endometriotic cells

Summary To investigate the clinical significance of monocyte chemotactic protein-1 (MCP-1) produced by endometriotic tissues, the endometriotic tissues were taken from 15 patients with endometriosis. MCP-1 mRNA and MCP-1 protein were determined by dot blot analysis and enzyme linked immunosorbent assay (ELISA) in endometriotic cells cultured with or without interleukin-1β (IL-lβ, 2 μg/L), tumor necrosis factor-α (TNF-α, 20 g/L). After exposure to IL-1β or TNF-α, the expression of MCP-1 mRNA in the endometriotic cells (8.635 ±0.826, 7.031 ±0.970, respectively) were significantly higher than that in the control group (4.482±0.435, P<0.05); The expression of MCP-1 protein in IL-lβ and TNF-α group was 4.52±0.09 μg/L,2.87±0.27 μg/L, respectively, which were significantly higher than 1.74±0.16 μg/L in control (P<0.01). The results suggested that IL-l\ and TNF-α could up-regulate the expression of MCP-1 in endometriotic cells, which might be related to the development of endometriosis.     

Impact of luteinized unruptured follicles on endometrial receptivity

This study examined the impact of luteinized unruptured follicle (LUF) on endometrial receptivity. The menstrual cycle of 17 LUF patients (LUF group) and 13 ovulatory women (control group) was monitored by measuring LH level in urine and by ultrasonic examination. An endometrial biopsy at the sixth to tenth day after LH surge was taken in all the patients. The expressions of endometrial ER, PR and integrin ανβ3 were immunohistochemically determined. At the same time, the serum levels of E2 and P were detected by chemiluminescence. The results exhibited that (1) The mean serum P level in LUF group (7.32±2.56 ng/mL) was significantly lower than that in control group (11.17±3.17 ng/mL) (P<0.01). But there was no significant difference in the mean serum E2 levels between LUF group (179.35±81.60 pg/mL) and the control group (198.58±75.23 pg/mL) (P>0.05); (2) The mean expression intensities of ER, PR in endometrium of LUF group (183.86±2.43, 167.94±3.04) were significantly higher than those in control group (109.35±6.31, 105.98±4.07) (P<0.01); (3) The mean expression intensities of integrin ανβ3 in endomtrium of LUF patients (114.90±11.38) were significantly lower than those in control group (191.34±1.82) (P<0.01); (4) The change profile of integrin ανβ3 expression in the endometrium of LUF patients was in positive relation with serum P level (r=0.77, P<0.01), but bore no significant relationship with serum E2 level (r=0.01, P>0.05). It was concluded that the depression of serum P levels in LUF patients was closely related to the failure of the down-regulation of ER and PR, and the low expressions of integrin ανβ3 also suggested that the delayed implantation and the impaired endometrial receptivity had impact on embryonic implantation.     

先心病合并重度肺动脉高压围术期白细胞相关体液因素在肺损伤中的作用

为探讨白细胞相关体液因素在先天性心脏病(简称先心病)合并重度肺动脉高压围术期肺损伤中的作用机制,对31例先心病室间隔缺损(非肺动脉高压16例,重度肺动脉高压15例)行直视修补术患者的围术期肺动脉压、全肺阻力、血栓素B₂(TXB₂)、6-酮-前列腺素F₁α(6-keto-PGF₁α)、丙二醛(MDA)、白介素-8(IL-8)以及动脉血白细胞计数的变化进行了分组研究。结果显示,围术期TXB₂、6-keto-PGF₁α与TXB₂的比值(P/T)、MDA、IL-8、动脉血白细胞以及中性粒细胞计数的变化与围术期肺动脉压、全肺阻力的改变密切相关。提示在先心病合并重度肺动脉高压患者的围术期,白细胞引起的体液因素改变可以造成肺动脉高压患者的肺损伤,并影响其血流动力学。