Classification system of sacroiliac joint dislocation with ipsilateral sacral wing fracture and its validity examination and clinical application evaluation / 中华创伤杂志

Objective:To establish the classification system of sacroiliac joint dislocation with ipsilateral sacral wing fracture (SJDISWF), examine its reliability and evaluate the clinical application.Methods:A multi-center retrospective case series study was conducted to analyze the clinical data of 20 SJDISWF patients admitted to Third Affiliated Hospital of Southern Medical University, Honghui Hospital Affiliated to Xi′an Jiaotong University and Third Hospital of Hebei Medical University from January 2016 to December 2019. There were 8 males and 12 females, aged from 13-58 years［(34.7±13.2)years］. Based on the direction of sacral displacement, SJDISWF was divided into 3 types. Type I: the sacroiliac joint dislocated and the ipsilateral sacral wing fracture fragment was anteriorly prolapsed; Type II: the sacroiliac joint dislocated, the ipsilateral sacral wing fracture fragment was compressed or crushed, the anterior sacral foramen may fractured; Type III: the sacroiliac joint dislocated and the ipsilateral sacral wing fracture end was inserted into the sacral canal, causing an intra-sacral canal occupation. The reliability of the classification was performed based on the assessment results of two phases in four observers at 4-week intervals. Treatments were utilized based on the types I, II, III fractures, including anterior approach for open reduction and internal fixation, closed reduction and internal fixation or posterior approach for open reduction and internal fixation respectively. Postoperative fracture healing time was recorded. Quality of fracture reduction was graded according to Matta′s criteria. Majeed functional score was recorded at postoperative 3 months, 6 months and the final follow-up. Complications were detected as well.Results:The overall Kappa value of inter-observer reliability was 0.890. The overall Kappa value of intra-observer reliability was 0.854. There were 12 patients with type I, 7 with type II and 1 with type III. All patients went through the procedure uneventfully and were followed up for 6-36 months［(20.0±8.7)months］. All patients achieved clinical healing in 8-14 weeks［(10.2±1.7)weeks］. According to the Matta′s criteria for fracture reduction, the outcome was excellent or good in 83% (10/12) for type I, 71% (5/7) for type II and 0% (0/1) for type III, with the overall excellent rate of 75%. Majeed functional score was (74.6±5.2)points at postoperative 3 months and (84.4±5.8)points at postoperative 6 months ( P<0.01). According to Majeed functional score, the outcome was excellent or good in 75% (9/12) for type I, 100% (7/7) for type II and 0% (0/1) for type III at the final follow-up, with the overall excellent rate of 80%. There were no complications such as lateral femoral cutaneous nerve or sciatic nerve injury, lower extremity deep vein thrombosis, sacroiliac joint pain, failure of internal fixation or loss of fracture reduction during the follow-up. Conclusions:The SJDISWF classification has high reliability. The classification-oriented treatment strategy has achieved a relatively satisfactory restoration and functional recovery, indicating that the classification plays a certain role in guiding treatment selection for SJDISWF.

Effect comparison of lateral-rectus approach and ilioinguinal approach in the treatment of toddlers with Torode-Zieg type IV pelvic fracture / 中华创伤杂志

Objective:To compare the clinical efficacy of lateral-rectus approach and ilioinguinal approach in the treatment of Torode-Zieg type IV pelvic fracture in toddlers.Methods:A retrospective cohort study was used to analyze the clinical data of 12 toddlers with Torode-Zieg type IV pelvic fracture admitted to Affiliated Hospital of Youjiang Medical College for Nationalities and Third Affiliated Hospital of Southern Medical University from June 2012 to June 2019. There were 6 males and 6 females, aged 13-36 months [(23.9±7.4)months]. Treatment via ilioinguinal approach was performed for 5 patients (ilioinguinal group), and via lateral-rectus approach for 7 patients (lateral-rectus group). Operation duration, intraoperative blood loss and postoperative complications were compared between the two groups. At the last follow-up, pelvic function was evaluated by Majeed function score, and fracture reduction was evaluated according to Mears-Velyvis radiological evaluation criterion.Results:All patients were followed for 24-72 months [(46.0±18.5)months]. In ilioinguinal group and lateral-rectus group, the operation time was (295.0±95.3)minutes and (165.1±52.2)minutes, respectively ( P<0.05), and the intraoperative blood loss was (190.0±65.2)ml and (225.7±92.0)ml, respectively ( P>0.05). In ilioinguinal group, the development of bilateral iliac wings was asymmetric in 3 patients. In lateral-rectus group, fracture-dislocation of epiphyseal plate together with abnormal development of iliac wing occurred in 1 patient, but had no effects on the function of lower limbs. According to Majeed function score at the last follow-up, the pelvic function in ilioinguinal approach group was rated as excellent in 1 patient, good in 2, fair in 1 and poor in 1, with the excellent and good rate of 60%, while the pelvic function in lateral-rectus group was excellent in 4 patients, good in 1, fair in 2 and poor in none, with the excellent and good rate of 71% ( P>0.05). According to Mears-Velyvis radiological evaluation criterion at the last follow-up, the fracture reduction in ilioinguinal group was rated as satisfied in 3 patients and dissatisfied in 2 patients, with the satisfaction rate of 60%, while the fracture reduction in lateral-rectus group was satisfied in 7 patients and dissatisfied in none, with the satisfaction rate of 100% ( P>0.05). Conclusions:For Torode-Zieg type IV pelvic fracture in toddles, both surgical approaches can complete the reduction and fixation. However, the lateral-rectus approach has shorter operation time and less damage to the epiphyseal structure around the pelvis than the ilioinguinal approach.

New lobane-type diterpenoids from the Xisha soft coral Sinularia polydactyla / 中国天然药物

Lobane-type diterpenoids are not frequently discovered from marine soft corals. In this paper, three new lobane type diterpenes, 13-methoxyloba-8,10,15(16),17(18)-tetraene (1), 8,10,13(15)Z,16E-lobatetraene (2) and 19-hydroxy-lobatetraene (3), and a new natural compound, 17,18-epoxyloba-16-acetoxy-8,10,13(15)-trien (4), co-occurring with a known related diterpenoid, 18-methoxyloba-8,10,13(15),16(17)-tetraene (5), were isolated from the South China Sea soft coral Sinularia polydactyla. The structures of new compounds were determined by extensive spectroscopic analysis and by comparison with those reported in the literature. In bioassay, all the isolates were inactive on antibacterial, PTP1B inhibitory, and immunological activities. This study increased the chemical diversity of marine diterpenoids.

Effect of hybrid intensity modulated radiotherapy on the immune function of patients with locally advanced breast cancer surgery and efficacy observation / 肿瘤研究与临床

Objective:To investigate the effect of hybrid intensity modulated radiotherapy (Hy-IMRT) on immune function in patients with locally advanced breast cancer surgery and the treatment efficacy.Methods:A total of 94 patients with locally advanced breast cancer who underwent modified radical mastectomy for breast cancer and required postoperative radiotherapy in Changzhou Cancer Hospital in Jiangsu Province from January 2015 to January 2017 were selected. The patients were divided into Hy-IMRT group (observation group, 47 cases) and three-dimensional conformal radiotherapy (3DCRT) group (control group, 47 cases) according to the random number table method. The dose and related radiophysical parameters of the respective target areas of the two groups, adverse reactions during and after radiotherapy, cytokines and T lymphocyte subsets before and after radiotherapy, 3-year local recurrence rate, distant metastasis rate and mortality were observed and compared between the two groups.Results:The dose obtained by 95% (D 95%) [(4 945.6±36.1) Gy vs. (4 754.0±35.6) Gy] and target area conformity (CI) of the target volume (0.7±0.1 vs. 0.5±0.1) in the observation group were greater than those in the control group, and the differences were statistically significant (both P<0.05); the target volume of 110% of the prescription dose (V 110%) [(1.6±0.5) cm 3 vs. (8.4±1.2) cm 3], the target volume of more than 105% of the prescription dose (V 105%) [(19.3±3.5) cm 3 vs. (26.6±5.6) cm 3] and the heterogeneity index (HI) (1.1±0.1 vs. 1.3±0.1) in the observation group were all smaller than those of the control group, and the differences were statistically significant (all P < 0.05). The incidence of acute skin adverse reactions [53.2% (25/47) vs. 74.5% (35/47)] and the incidence of bone marrow suppression [40.4% (19/47) vs. 70.2% (33/47)] in the observation group were lower than those in the control group, and the differences were statistically significant (both P < 0.05). There were no significant differences in levels of interleukin 6 (IL-6), tumor necrosis factor alpha (TNF-α), CD4 +, CD8 +, and CD4 +/CD8 + between the two groups before radiotherapy (all P > 0.05). At the end of radiotherapy, the levels of IL-6, TNF-α and CD8 + were higher in both groups than before radiotherapy (all P < 0.05), and CD4 + and CD4 +/CD8 + were lower than before radiotherapy (both P < 0.05). The levels of IL-6, TNF-α and CD8 + in the observation group were lower than those in the control group, while the CD4 + and CD4 +/CD8 + were higher than those in the control group (all P < 0.05). The 3-year local recurrence rate [34.04% (16/47) vs. 42.55% (20/47)], distant metastasis rate [25.53% (12/47) vs. 38.30% (18/47)] and mortality rate [14.89% (7/47) vs. 19.15% (9/47)] in the observation group were lower than those in the control group, but the differences were not statistically significant (all P > 0.05). Conclusion:Compared with 3DCRT, the Hy-IMRT has less effect on the immune function of locally advanced breast cancer patients after modified radical resection, and the incidences of acute skin reaction and bone marrow adverse reaction are low.

Meta-analysis of Banmao Capsules in adjuvant treatment for non-small cell lung cancer / 中国中药杂志

To systemically evaluate the efficacy and safety of Banmao Capsules in the adjuvant treatment for non-small cell lung cancer(NSCLC). All of randomized controlled trials(RCT) about Banmao Capsules in adjuvant treatment for non-small cell lung cancer were retrieved in PubMed, EMbase, Cochrane Library, CNKI, VIP, CBM, WanFang database from database inception to August 2019. Two researchers extracted data and assessed literature quality separately, and made a Meta-analysis by RevMan 5.3 software. Thirteen trials involving 1 148 patients, including 595 in treatment group and 553 in control group, were enrolled in the review. The Meta-analysis showed that compared with conventional treatment, adjuvant treatment of NSCLC with Banmao Capsules can enhance the objective tumor response rate(RR=1.43,95%CI[1.30,1.58],P<0.01), and the disease control rate(RR=1.16,95%CI[1.11,1.22],P<0.01); improve the quality of life(RR=1.56,95%CI[1.27,1.92],P<0.01); reduce the incidence of myelosuppression(RR=0.41,95%CI[0.26,0.66],P<0.01), gastrointestinal reactions(RR=0.46,95%CI[0.33,0.65],P<0.01), liver and kidney dysfunction(RR=0.44,95%CI[0.29,0.66],P<0.01). The results showed that in the treatment of NSCLC, Banmao Capsules can increase the short-term efficacy, improve the quality of life of patients, and reduce the side effects of platinum-based chemotherapy drugs. More high-quality and large-scale randomized controlled trials are required in the future.

Characterization of inthomycin biosynthetic gene cluster revealing new insights into carboxamide formation / 中国天然药物

Inthomycins are polyketide antibiotics which contain a terminal carboxamide group and a triene chain. Inthomycin B (1) and its two new analogues 2 and 3 were isolated from the crude extract of Streptomyces pactum L8. Identification of the gene cluster for inthomycin biosynthesis as well as the N-labeled glycine incorporation into inthomycins are described. Combined with the gene deletion of the rare P450 domain in the NRPS module, a formation mechanism of carboxamide moiety in inthomycins was proposed via an oxidative release of the assembly chain assisted by the P450 domain.

Meta-analysis of Cinobufacini Injection combined with platinum-contained first-line chemotherapy in treatment of non-small cell lung cancer / 中国中药杂志

To systemically evaluate the efficacy and safety of Cinobufacini Injection in combination with platinum-contained first-line chemotherapy for treatment of non-small cell lung cancer(NSCLC). The randomized controlled trials(RCT) about the Cinobufacini in combination with platinum-contained first-line chemotherapy(versus chemotherapy alone) were collected through PubMed,Cochrane library,CNKI,VIP,CBM,and Wan Fang Database from database inception to December 2018. Two researchers extracted data and assessed the literature quality separately,and made a Meta-analysis by using Rev Man 5. 3 software. Twenty-seven RCTs were included in the present review,involving 2 125 patients,1 082 in treatment group and 1 043 in control group. The Meta-analysis results showed that as compared with chemotherapy alone,the combination of Cinobufacini and platinum-contained first-line chemotherapy could enhance one year survival rate(RR = 1. 34,95%CI[1. 17,1. 55],P< 0. 01),two year survival rate(RR = 1. 84,95% CI[1. 31,2. 59],P<0. 01),objective tumor response rate(RR = 1. 47,95%CI[1. 33,1. 63],P<0. 01); improve the quality of life for patients(RR =1. 54,95%CI[1. 37,1. 72],P < 0. 01); and reduce the incidences of WBC toxicity(RR = 0. 63,95% CI[0. 49,0. 80],P < 0. 01),platelet toxicity(RR = 0. 54,95%CI[0. 35,0. 84],P<0. 01),gastrointestinal reactions(RR = 0. 60,95%CI[0. 45,0. 80],P<0. 05),pain(RR = 1. 68,95% CI[1. 38,2. 03],P< 0. 01),and hair loss reaction(RR = 0. 76,95% CI[0. 59,0. 98],P < 0. 05). The results showed that for the treatment of NSCLC,the addition of cinofacini to conventional platinum-contained chemotherapy can increase the long-term and short-term efficacy of chemotherapy,improve the quality of life for patients,and reduce the side effects of platinumbased chemotherapy drugs. However,more high quality and large-scale randomized controlled trials are required to verify this conclusion in the future.

Antibacterial sorbicillin and diketopiperazines from the endogenous fungus Penicillium sp. GD6 associated Chinese mangrove Bruguiera gymnorrhiza / 中国天然药物

One new sorbicillin derivative, 2-deoxy-sohirnone C (1), one new diketopiperazine alkaloid, 5S-hydroxynorvaline-S-Ile (2), and two naturally occurring diketopiperazines, 3S-hydroxylcyclo(S-Pro-S-Phe) (3) and cyclo(S-Phe-S-Gln) (4), together with three known compounds were isolated from the Chinese mangrove endophytic fungus Penicillium sp. GD6. Their structures were determined on the basis of extensive spectroscopic analyses and by comparison with literature data. The absolute configuration of 3-hydroxyl moiety in 3 was determined by Mosher's method, while the absolute stereochemistry of 2 and 4 was established by comparison with the CD spectra of natural and synthesized diketopiperazines. Compound 1 showed moderate antibacterial activity against Methicillin-resistant Staphylococcus aureus with a MIC value of 80 μg·mL.

Pathological features and survival of triple positive breast cancer in 271 cases / 中国现代普通外科进展

Objective:To explore pathological features and survival of triple positive breast cancer (TPBC).Methods:The clinical data of 271 cases of triple positive breast cancer from January 2010 to January 2017 in Suqian area were collected,compared with 283 cases of Luminal B I (HER2 negative).The clinical pathological features and survival were analyzed.Results:Among 271 cases of triple positive breast cancer,there were 89 cases (32.84％) of distant recurrence and metastasis in 2 years,and 137 cases (50.55％) of distant recurrence in 5 years.Among 283 cases of Luminal B I,there were 32 cases (11.31 ％) of distant recurrence and metastasis in 2 years.and 52 cases (18.37％) of distant recurrence in 5 years.There were significantly differences(P＜0.05).1 year Disease-free survival (DFS)and Overall survival (OS) of all patients were 100％,Among 271 cases of triple positive breast cancer,2-year DFS and OS were 64.94 ％,85.24％ respectively.3-year DFS and OS were 54.98 ％,69.74％ respectively,5-year DFS and OS were 43.54％,47.23％ respectively.Among 283 cases of Luminal B I,2-year DFS and OS were 86.22 ％,95.76％ respectively.3-year DFS and OS were 81.98 ％,80.92％ respectively,5-year DFS and OS were 76.33％,67.49％ respectively.There were significantly differences(P＜0.05).Conclusion:TPBC has the characteristics of poor biological behavior,large mass,pathological grade of grade Ⅲ,vascular or nerve infiltration,axillary lymph node metastasis,high proliferation index and high tumor load,and early distant recurrence,low DFS and OS.We Should choose individualized,targeted treatment programs,based on patient's hormone receptor and Ki67 expression,so as to benefit patients of TPBC.

Antibacterial sorbicillin and diketopiperazines from the endogenous fungus Penicillium sp. GD6 associated Chinese mangrove Bruguiera gymnorrhiza / 中国天然药物

One new sorbicillin derivative, 2-deoxy-sohirnone C (1), one new diketopiperazine alkaloid, 5S-hydroxynorvaline-S-Ile (2), and two naturally occurring diketopiperazines, 3S-hydroxylcyclo(S-Pro-S-Phe) (3) and cyclo(S-Phe-S-Gln) (4), together with three known compounds were isolated from the Chinese mangrove endophytic fungus Penicillium sp. GD6. Their structures were determined on the basis of extensive spectroscopic analyses and by comparison with literature data. The absolute configuration of 3-hydroxyl moiety in 3 was determined by Mosher's method, while the absolute stereochemistry of 2 and 4 was established by comparison with the CD spectra of natural and synthesized diketopiperazines. Compound 1 showed moderate antibacterial activity against Methicillin-resistant Staphylococcus aureus with a MIC value of 80 μg·mL.

Application of internal iliac artery embolization and presetting abdominal aorta balloon for complicated pelvic frac-tures / 中华骨科杂志

Objective To evaluate the clinical outcome of bleeding control by preoperative embolization of internal iliac artery with DSA and intra?operative presetting abdominal aorta balloon, combine with the operation techniques of exposure, reduc?tion and internal fixation of pelvic fracture through lateral?rectus approach. Methods From March 2012 to May 2015, 7 patients with type C3 pelvic fractures admitted to our department from March 2012 to May 2015, treated with preoperative embolization of internal iliac artery under digital subtraction angiography 2 h before surgery and presetting abdominal aorta balloon were retrospec?tively reviewed. There were 3 males and 4 females, with an average age of 34 years (range, 16 to 61 years). According to AO classi?fication, all 7 cases belonged to type C3 (3.2:5 cases;C3.3:2 cases), including 5 cases with limb fracture, 2 cases with craniocere?bral trauma, 4 cases with pulmonary contusion, 2 cases with injury of abdominsal organs. Time from injury to operation was 19 days on average (10 to 33 days). Patients received damage control surgery treatment including bleeding control and temporary ex?ternal fixation, and ipsilateral tractions with heavy weight, intensive care and corrections of general situation before operation. The fracture model was manufactured by 3D printing and fracture reduction was simulated on computer preoperatively. Embolization of internal iliac artery was performed in the side of severe displaced sacroiliac joint with DSA 2 hours preoperatively. Reduction was performed to stabilize anterior-posterior pelvic ring and acetabular fractures via the intraoperative lateral?rectus approach. And 2 cases were performed by temporary balloon occlusion of abdominal aorta (≤60 min) for bleeding control in reduction of in the side of sacroiliac joint fractures. Results All the 7 cases had undergone the operations successfully, and the operating time was from 135-320 min with blood loss from 440-3 350 ml. According to Matta radiological evaluation postoperatively, reduction of pelvic fracture was rated as anatomic in 5 cases, satisfactory in 2, without complications. All 7 cases were complicated with lumbosacral plexus injury or lumbosacral trunk injury at different degrees (M0 2 cases, M1 2 cases, M2 2 cases, M3 1 case). According to the BMRC scoring system, 5 cases had well recovered and the other 2 cases had no improvement after three months (M4 2 cases, M5 3 cases). Conclusion Surgical management of pelvic fracture through preoperative internal iliac artery embolization and intra?oper?ative occlusion of abdominal aorta could effective control bleeding and achieve favorable conditions for reduction. Lateral?rectus approach can provide adequate exposure of the anterior and posterior ring, and this approach could also provide excellent visual control of reduction and fixation.

Application of three-dimensional printing personalized acetabular wing-plate in treatment of complex acetabular fractures via lateral-rectus approach / 中华外科杂志

Objective@#To investigate reduction and fixation of complex acetabular fractures using three-dimensional (3D) printing technique and personalized acetabular wing-plate via lateral-rectus approach.@*Methods@#From March to July 2016, 8 patients with complex acetabular fractures were surgically managed through 3D printing personalized acetabular wing-plate via lateral-rectus approach at Department of Orthopedics, the Third Affiliated Hospital of Southern Medical University. There were 4 male patients and 4 female patients, with an average age of 57 years (ranging from 31 to 76 years). According to Letournel-Judet classification, there were 2 anterior+ posterior hemitransverse fractures and 6 both-column fractures, without posterior wall fracture or contralateral pelvic fracture. The CT data files of acetabular fracture were imported into the computer and 3D printing technique was used to print the fractures models after reduction by digital orthopedic technique. The acetabular wing-plate was designed and printed with titanium. All fractures were treated via the lateral-rectus approach in a horizontal position after general anesthesia. The anterior column and the quadrilateral surface fractures were fixed by 3D printing personalized acetabular wing-plate, and the posterior column fractures were reduction and fixed by antegrade lag screws under direct vision.@*Results@#All the 8 cases underwent the operation successfully. Postoperative X-ray and CT examination showed excellent or good reduction of anterior and posterior column, without any operation complications. Only 1 case with 75 years old was found screw loosening in the pubic bone with osteoporosis after 1 month′s follow-up, who didn′t accept any treatment because the patient didn′t feel discomfort. According to the Matta radiological evaluation, the reduction of the acetabular fracture was rated as excellent in 3 cases, good in 4 cases and fair in 1 case. All patients were followed up for 3 to 6 months and all patients had achieved bone union. According to the modified Merle D′Aubigné and Postel scoring system, 5 cases were excellent, 2 cases were good, 1 case was fair.@*Conclusions@#Surgical management of complex acetabular fracture via lateral-rectus approach combine with 3D printing personalized acetabular wing-plate can effectively improve reduction quality and fixation effect. It will be truly accurate, personalized and minimally invasive.

Value of 64-slice spiral CT functional imaging techniques for diagnosis of acute kidney injury in rabbits / 实用放射学杂志

Objective To quantitatively assess renal hemodynamic changes in hypertensive acute kidney injury in rabbits induced by L-NAME using 64-slice spiral CT functional imaging techniques,and to explore the application of these techniques in evaluation of early kidney functional changes.Methods Fourteen female New Zealand white rabbits were randomly divided into normal control group (n=6)and L-NAME group (n=8).The control group was injected NaCl solution and the L-NAME group was injected the same amount of L-NAME solution to make hypertensive acute kidney injury model.64-slice spiral CT and SPECT were scanned af-ter injection.Blood samples were collected before and after injecting NaCl and L-NAME solution to detect serum creatinine (Cr).Cr level and CT perfusion parameters of the two groups were analyzed and compared with the pathology results.GFRCT detected by con-trast-enhanced CT and GFRSPECT detected by SPECT were analyzed by the rank correlation test.Results Renal blood volume,blood flow,permeability surface,time to peak,and peak value had statistically significant differences between the control and L-NAME group (P <0.05).GFRCT and GFRSPECT had obvious correlation.GFRCT of L-NAME group was obviously lower than that of the con-trol group.The kidneys of L-NAME group showed obviously injured under both light microscope and microscope.Conclusion 64-slice spiral CT functional imaging techniques can dynamically observe and quantitatively assess early hypertensive kidney dysfunc-tion,especially unilateral renal blood flow abnormalities.It is an effective examination in quantitatively assessing kidney function.

Osteogenic Differentiation Potential of Bone Marrow Mesenchymal Stem Cells in Patients with Myelodysplastic Syndromes / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To investigate the osteogenic differentiation potential of bone marrow mesenchymal stem cells (BMMSC) in patients with myelodysplastic syndromes (MDS) and to explore the role of BMMSC osteogenic differentiation in the pathogenesis of MDS.</p><p><b>METHODS</b>BMMSC were isolated from bone marrow of patients with MDS and healthy donors, then expanded in vitro. The expression of transcription factor gene RUNX2, Osterix and osteogenic differentiation markers (ALP, BSP, OPN, OCN) were measured by real-time PCR, the alkaline phosphatase(ALP) activity was assessed at 3, 7, 10 days after osteogenic differentiation. Mineralization analysis was performed at day 21 of osteogenic induction.</p><p><b>RESULTS</b>The expression level of RUNX2 and Osterix were significantly decreased in BMMSC from lower-risk MDS patients compared with normal controls (P<0.05). After osteogenic induction, low-risk MDS showed lower alkaline phosphatase activity at day 3 (P<0.05), less intense alizarin red S staining at day 21 (P<0.05), and lower gene expression of osteogenic differentiation markers (P<0.05), however, these expressions in higher-risk MDS were normal.</p><p><b>CONCLUTION</b>BMMSC from low-risk MDS have abnormalities in osteogenic differentiation, it may contribute to the ineffective hamatopoiesis of MDS.</p>

Clinical significance of microRNA-130b in osteosarcoma and in cell growth and invasion

Objective: To investigate clinical significance of microRNA-130b (miR-130b) in osteosarcoma and its role in cell growth and invasion. Methods: miR-130b expression was detected in 68 samples of surgically resected osteosarcoma and matched normal tumor-adjacent tissues by qRT-PCR. The expression of miR-130b was altered by corresponding vectors in osteosarcoma cells, and then Western blot was used to detect the expression of PPARγ. BrdU cell proliferation and Transwell assays were performed to determine cell proliferation and invasion. Results: The expression of miR-130b in osteosarcoma tissues was significantly higher than that in normal tumor-adjacent tissues. Its expression in patients with metastasis was significantly higher than that in those without metastases. miR-130b expression in tumor tissues was significantly associated with tumor size, clinical stage and distant metastasis. And its expression was significantly correlated with overall survival and disease free survival. miR-130b overexpression obviously repressed the expression of PPARγ, and resulted in significant increase of Saos-2 cell proliferation and invasion. On the contrast, repressing miR-130b expression with its inhibitor significantly increased PPARγ expression, and inhibited MG-63 cell proliferation and invasion. Conclusions: The high-expression of miR-130b is correlated with the adverse clinicopathological features and poor prognosis in osteosarcoma. miR-130b may regulate proliferation and invasion of osteosarcoma cells by targeting PPARγ, suggesting miR-130b may play a key role in the progression of osteosarcoma.

Quantitative analysis of renal injury using CEUS in hypertensive rabbits model induced by L-NAME / 天津医药

Objective To assess the value of contrast-enhanced ultrasound (CEUS) on quantitative analysis of re?nal cortex perfusion in hypertensive rabbits model. Methods Hypertensive rabbit modal (n=10) were established by inject?ing N-nitro-L-arginin methylester (L-NAME). CEUS and Cystatin C (CysC) serum level analysis were performed at differ?ent time points:before and the 2nd, 4th, 6th and 8th week after injecting L-NAME. Time-intensity curve and area under curve (AUC) were analyzed quantatively while correlation of AUC and CysC were also analyzed. Results Serum level of Cys C in?creased significantly at the 6th week after L-NAME administration which is earlier than the increase of serum levels of Scr and BUN. AUC decreased at first then increased after L-NAME administration. Upon addition of L-NAME, rise time (RT) and peak intensity (PI) decreased while mean transit time (MTT), time from peak to one half (HPT) and time to peak (TTP) in?creased. Our study confirmed a positive correlation between AUC and Cys C (r=0.950, P<0.001). Conclusion Setting up rabbits model by L-NAME is convenient and reproducible, which is an useful tool in experimental study of preclinical and clinical phase of hypertensive renal injury. CEUS combining with CysC serum level analysis is considered as an effective technology for evaluating renal function in hypertensive patients.

Clinical significance of microRNA-130b in osteosarcoma and in cell growth and invasion

OBJECTIVE@#To investigate clinical significance of microRNA-130b (miR-130b) in osteosarcoma and its role in cell growth and invasion.@*METHODS@#miR-130b expression was detected in 68 samples of surgically resected osteosarcoma and matched normal tumor-adjacent tissues by qRT-PCR. The expression of miR-130b was altered by corresponding vectors in osteosarcoma cells, and then Western blot was used to detect the expression of PPARγ. BrdU cell proliferation and Transwell assays were performed to determine cell proliferation and invasion.@*RESULTS@#The expression of miR-130b in osteosarcoma tissues was significantly higher than that in normal tumor-adjacent tissues. Its expression in patients with metastasis was significantly higher than that in those without metastases. miR-130b expression in tumor tissues was significantly associated with tumor size, clinical stage and distant metastasis. And its expression was significantly correlated with overall survival and disease free survival. miR-130b overexpression obviously repressed the expression of PPARγ, and resulted in significant increase of Saos-2 cell proliferation and invasion. On the contrast, repressing miR-130b expression with its inhibitor significantly increased PPARγ expression, and inhibited MG-63 cell proliferation and invasion.@*CONCLUSIONS@#The high-expression of miR-130b is correlated with the adverse clinicopathological features and poor prognosis in osteosarcoma. miR-130b may regulate proliferation and invasion of osteosarcoma cells by targeting PPARγ, suggesting miR-130b may play a key role in the progression of osteosarcoma.

mRNA expression of notch ligand-delta-like-1 and jagged-1 in mesenchymal stem cells of MDS patients / 中国实验血液学杂志

This study was aimed to investigated the mRNA expression levels of Notch ligands- Delta-like-1 and Jagged-1 in bone marrow mesenchymal stem cells of patients with myelodysplastic syndrome (MDS), and to explore their relation with onset of MDS. Bone marrow mesenchymal stem cells of 38 patients with MDS and 16 normal subjects as control were collected to detect mRNA expression of Delta-like-1 and Jagged-1 by using real-time quantitative polymerase chain reaction. The results showed that the expression levels of Delta-like-1 and Jagged-1 in mesenchymal stem cells of MDS patients were significantly higher than that in normal controls (P < 0.05). According to WHO criteria, the mRNA expression of Delta-like-1 in RA/RAS, RCMD and RAEB groups were significantly higher than that in normal controls (P < 0.05), the mRNA expression of Jagged-1 in RAEB group was also significantly higher than that in normal controls (P < 0.05). The mRNA expression of Delta-like-1 was significantly correlated with the proportion of blasts in the bone marrow of MDS patients (r = 0.502, P < 0.05). The expression levels of Delta-like-1 and Jagged-1 in MDS patients with abnormal karyotypes were significantly higher than those in MDS patients with normal karyotypes (P < 0.05). The mRNA expression of Delta-like-1 in higher risk group according to International Prognostic Scoring System was significantly higher than that in lower risk group (P < 0.05), there was no significant difference in Jagged-1 expression levels between higher risk group and lower risk group (P > 0.05). It is concluded that the changes of Delta-like-1 and Jagged-1 expression level in MSC may play a role in the pathogenesis of myelodysplastic syndrome.

Iron chelation therapy and its influence on the alleviation of EPO resistance in MDS patients / 中国实验血液学杂志

This study was aimed to investigate the changes of erythropoietin (EPO), hemoglobin(Hb) and recombinant EPO (rEPO) levels in MDS patients receiving iron chelation therapy, and to explore the relationship between EPO and serum ferritin(SF). A total of 172 MDS patients and 30 healthy controls were studied. The levels of SF, EPO, serum iron (SI), total iron binding capacity (TIBC), C-reaction protein (CRP) and Hb were measured respectively, the level of SF was adjusted according to the changes of CRP. Among them, there were 34 cases of low-risk (SF>1 000 mg/L) receiving deferoxamine therapy, whose changes of SF, EPO, SI, TIBC, Hb levels were detected and compared before and after treatment. Besides, the difference in the incidence of EPO resistance in iron overload group and non-iron overload group was assessed before and after therapy, and 58 cases of low-risk and EPO<1 000 U/L MDS patients were given rEPO therapy. The results showed that the level of EPO in non-iron overload group was higher than that in the normal control group (997.44 ± 473.48 vs 467.27 ± 238.49, P < 0.05). Obviously, the level of EPO in iron overload group was higher than that in non-iron overload group and control group (3257.59 ± 697.19 vs 997.44 ± 473.48, P = 0.012, 3257.59 ± 697.19 vs 467.27 ± 238.49, P = 0.002). Otherwise, the incidence of EPO resistance in iron overload group was higher than that in non-iron overload group (18/35 vs 2/23, P = 0.001), and the level of EPO and SF was positively related to each other in iron overload group (r = 0.310,P = 0.036). After receiving iron chelation therapy, the levels of SF, SI, TIBC and EPO in iron overload group were significantly lower than that before therapy (3942.38 ± 641.82 vs 2266.35 ± 367.31, P = 0.028;48.61 ± 10.65 vs 28.52 ± 12.61, P = 0.034;59.84 ± 12.62 vs 33.76 ± 15.43, P = 0.045;3808.01 ± 750.22 vs 1954.78 ± 473.18, P = 0.042). Moreover, the level of Hb increased (35 ± 18 vs 57 ± 21, P = 0.046) and the EPO resistance in some patients was decreased. It is concluded that iron chelation therapy can improve the efficacy of EPO to alleviate EPO resistance in patients wtih anemic MDS, decrease the pathological level of EPO, enhance Hb levels and reduce the dependency on blood transfusion.

Application of Auto-regressive Linear Model in Understanding the Effect of Climate on Malaria Vectors Dynamics in the Three Gorges Reservoir / 生物医学与环境科学（英文）

It is important to understand the dynamics of malaria vectors in implementing malaria control strategies. Six villages were selected from different sections in the Three Gorges Reservoir for exploring the relationship between the climatic factors and its malaria vector density from 1997 to 2007 using the auto-regressive linear model regression method. The result indicated that both temperature and precipitation were better modeled as quadratic rather than linearly related to the density of Anopheles sinensis.