Objective To investigate the sequence variations of mitochondrial D-loop region in chronic glomerular nephritis patients and family members and their possible associations with chronic glomerular nephritis.Methods 20 patients with chronic glomerular nephritis and 48 unaffected pedigree members,as well as 122 cases of normal control were recruited.mtDNA extracted from peripheral blood were examined by PCR-based assay for D-loop sequence variations,followed by sequencing analysis.Results Compared with the normal control and standard sequence,a total of 61 sequence variants were detected,among these,three high variations were found,and the base variation rate of patients with chronic glomerular nephritis(CGN)and unaffected pedigree members(UAPM)(0.88%,0.72%)significantly increased compared with the control group(0.61%).The distibutional difference of base variation rate in the experimental groups were significantly higher than those in the control group(x2=21.220,7.964,all P<0.05).Especially in microsatellite variation in D310 region,the mutation frequency and base variation rate in patients with CGN were 100.00% and 30.00%,respectively,which of UAPM were 81.30% and 17.95%,respectively,while those in the normal control group were 53.30% and 6.05%,respectively.Among them,the patients with CGN compared with the control group had statistically significant differences(x2=15.610,150.047,all P<0.05).Likewise,UAPM also had statistically significant difference compared with the control group(x2=11.347,66.188,all P<0.05).Conclusion D-Loop of mitochondrial genome mutations may be related to the development of chronic glomerular nephritis.

Objective To observe the clinical efficacy of peritoneal dialysis in the treatment of acute renal failure in children with burns ,and to summarize the experience of treatment .Methods The clinical data of 9 children with burns complicated with acute renal failure who received peritoneal dialysis were retrospectively analyzed . Results On the basis of rehydration and anti -infective therapy , 9 patients underwent continuous bed peritoneal dialysis(CAPD) treatment.The average duration of peritoneal dialysis was 11 days.The average hospital stay was 33 days.The levels of blood urea nitrogen and creatinine were (17.69 ±6.01)mmol/L,(412.21 ±188.74)μmol/L at 5 days after peritoneal dialysis,and the levels of blood urea nitrogen and creatinine were (35.24 ±8.35)mmol/L, (801.23 ±298.15)μmol/L before the peritoneal dialysis,the differences were statistically significant (t =5.12, 3.31,all P<0.01).The levels of blood urea nitrogen and creatinine were (9.76 ±3.37) mmol/L,(168.48 ± 112.25)μmol/L at 10 days after peritoneal dialysis,there were significant improvements compared with 5 days after peritoneal dialysis(t=3.45,3.33,all P<0.01).The symptoms of uremia disappeared or improved obviously ,and the complications of peritoneal dialysis were not obvious .Conclusion Pediatric burns with acute renal failure with dialysis indications preferred peritoneal dialysis treatment ,in the course of treatment should take into account the ade-quacy of dialysis and children with the development of individualized programs .

Objective To prepare rat models of liver stagnation syndrome constipation-type irritable bowel syndrome(IBS-C)using single and multi-factor modeling method with different indicators,to provide ideal experimental animal models of IBS-C.Methods Forty-two SD rats were divided randomly into blank(Normal),cold-water gavage(Cold),restraint(Restrain),tail-clamping(Tail),cold-water gavage + restraint(C + R),and cold-water gavage + tail-clamping groups(C + T).Body weight,food intake,water intake,and survival status,as well as open-field behavior,fecal Bristol score,visceral sensitivity,and small intestine propulsion were observed in each group during the modeling period.Pathological changes in the rat colon were observed by hematoxylin and eosin staining,and the serum and colon contents of 5-hydroxytryptamine(5-HT)and vasoactive intestinal peptide(VIP)were determined by enzyme-linked immunosorbent assay.Results The body weight in each group decreased after modeling(P<0.05,P<0.01),the food and water intakes decreased,and serum 5-HT levels increased.The number of fecal particles and Bristol score decreased while the colon 5-HT content increased in the Cold group(P<0.05,P<0.01);the total distance and average speed of the restraint group in the open field decreased(P<0.01);the preference for sugar water in the Tail group decreased(P<0.01);the preference for sugar water,total open-field distance,small intestine propulsion rate,defecation particles,and Bristol score all decreased,while the colon 5-HT content increased and the VIP content decreased in the C + T group(P<0.05,P<0.01);and the total distance,average speed,and VIP content in the colon decreased in the C + R group(P<0.05).Except for the Tail group,all the model groups showed visceral hypersensitivity(P<0.05,P<0.01)compared to the blank group at various pressure values on days 7 and 14 of modeling.Pathological observations showed no significant inflammatory cell infiltration or pathological changes in any of the model groups.Conclusions The combination of ice-water gastric lavage and tail clamping can be used to establish a rat model of liver depression syndrome in IBS-C.This may be the best of the five tested method,and the resulting model may lay the foundation for further systematic and in-depth research into the mechanism of traditional Chinese medicine in preventing and treating IBS-C.

OBJECTIVE: To explore the genetic mechanism underlying a case with para-Bombay phenotype. METHODS: The ABO and Lewis phenotype were identified with serological methods. The coding regions of exons 6 and 7 of the ABO and FUT1 genes were amplified with PCR and directly sequenced. Haploid sequence analysis was carried out on the variant sites of the FUT1 gene. RESULTS: Serological analysis confirmed that the proband has a rare para-Bombay phenotype. Direct sequencing revealed that he was a B.01/O.01.02 heterozygote for the ABO gene, and had heterozygous deletion for the 768 and 881-882 sites of the FUT1 gene. Further haploid analysis showed that the c.881_882delTT deletion has occurred in one haploid while c.768delC was present in the other haploid. The proband was therefore determined as a FUT1*01N.13/01N.20 heterozygote, which have resulted in frameshift in polypeptide chain p.Phe294Cysfs*40 and p.Val257Phefs*23, respectively. CONCLUSION A rare bi-allelic heterozygous deletion of para-Bombay phenotype has been identified in a blood donor. The c.881_882delTT and c.768delC deletions may decrease the activity of α-1,2-fucosyltransferase.
Animals ; Male ; ABO Blood-Group System/genetics* ; Alleles ; Fucosyltransferases/genetics* ; Genotype ; Heterozygote ; Mutation ; Phenotype ; Humans

[ ABSTRACT] AIM:To investigate the effects of Chaihu Shugan powder ( CSP) on lipid metabolism and the pro-teins involved in adenosine 5’-monophosphate-activated protein kinase (AMPK)/sirtuin 1 (SIRT1) pathway in the liver tissues of the rats with non-alcoholic fatty liver disease (NAFLD).METHODS: Sprague-Dawley rats were randomly di-vided into normal control ( NC) group, with HFD ( HFD) group and CSP group.The NAFLD models were established by feeding with HFD for 16 weeks in the rats.The rats in CSP group were intragastrically administered with CSP extracts (9.6 g· kg-1 · d-1 ) , and blood and liver samples were collected 16 weeks later.Serum and liver levels of total cholesterol ( TC) and triglyceride ( TG) , and serum levels of alanine aminotransferase ( ALT) and aspartate aminotransferase ( AST) were measured using an automatic biochemical analyzer.The histological changes of liver tissues were observed with HE staining, while the lipid deposition was observed with Oil Red O staining.The ultrastructural changes of the liver tissues were observed under transmission electron microscope.Moreover, the protein levels of AMPK, phosphorylated AMPK (pAMPK), SIRT1 and uncoupling protein 2 (UCP2) in the liver were detected by Western blot.RESULTS:The results of HE staining, Oil Red O staining and electron microscopy demonstrated that NAFLD rat model was successfully estab-lished.Compared with NC group, the serum and liver levels of TC and TG, and serum level of AST in model group were markedly elevated ( P<0.01) .Moreover, the protein levels of pAMPK and SIRT1 in HFD group were markedly reduced (P<0.01), whereas UCP2 level was elevated (P<0.01).Furthermore, liver levels of TC and TG, and serum level of AST in GSP group were markedly reduced as compared with HFD group ( P<0.05 ) .The protein levels of pAMPK and SIRT1 were elevated ( P<0.05 ) , whereas the UCP2 level was reduced as compared with HFD group ( P<0.01 ) .The protein level of AMPK between the 3 groups had no significant difference.CONCLUSION: CSP attenuates hepatic lipid disorder and hepatic lipid deposition in NAFLD rats induced by feeding with HFD for 16 weeks, which is associated with the activation of AMPK/SIRT1 pathway.

Objective:To compare the efficacy of open surgery and arthroscopic assisted surgery in treatment of knee dislocations.Methods:A retrospective case-control study was conducted to analyze the clinical data of 80 patients with knee dislocations admitted to Second Hospital of Lanzhou University from May 2013 to September 2019, including 59 males and 21 females, aged 18-66 years [(42.5±11.6)years]. Open multiple ligament reconstruction was performed in 49 patients (open group) and arthroscopic assisted multiple ligament reconstruction was performed in 31 patients (arthroscopic group). The postoperative hospitalization days, incidence of complications, time needed for recovery of knee range of motion (>0°, >90°, >120°), and time to complete weight-bearing were compared between the two groups. The Lysholm score, international knee documentation committee (IKDC) subjective knee form, Tegner activity level, score of the MOS item short-form health survey (SF-36), patient satisfaction and knee range of motion were compared between the two groups at the last follow-up.Results:All the patients were followed up for 1.2-7.4 years [(3.8±1.5)years]. There was no significant difference in postoperative hospitalization days or incidence of complications between the two groups ( P>0.05). No significant difference was found in time needed for recovery of knee range of motion (>0°, >120°) or time to complete weight-bearing ( P>0.05). The time needed for recovery of knee range of motion (>90°) was 90(60, 90)days in open group and 60(30, 90)days in arthroscopic group ( P<0.05). At the last follow-up, there was no significant difference in Lysholm score, IKDC subjective score, Tegner activity level, SF-36 score, or patient satisfaction between the two groups ( P>0.05). At the last follow-up, the knee range of motion was 120°(90°, 130°) in open group and 135°(120°, 140°) in arthroscopic group ( P<0.05). Conclusion:For treatment of knee dislocations, open surgery and arthroscopic assisted surgery have similar results in the long-term effect, while arthroscopic assisted surgery has benefits in early rehabilitation and ultimately better knee range of motion.

Objective To analyze the influence of drainage volume on prognosis of acute hydrocephalus(AHC)after aneurysmal subarachnoid hemorrhage(aSAH)by continuous lumbar drainage.Methods A retrospective trial was conducted on 82 AHC patients after aSAH admitted to the First Affiliated Hospital of Chongqing Medical University between January 2017 and January 2022.In 6 months after discharge,modified Rankin Scale(mRS)score was used to evaluate the prognostic outcomes.Univariate and multivariate logistic regression analyses were performed on demographic factors,severity of subarachnoid hemorrhage(SAH)at admission,medical history,cerebral vasospasm,and lumbar drainage data.Then a nomogram prediction model was constructed.Results Univariate analysis found that World Federation of Neurosurgical Societies(WFNS)score,Hunt-Hess grade,modified Fisher grade,time for continuous lumbar drainage,shunt dependence,cerebral vasospasm,and drainage volume were factors affecting the prognosis of the patients.Then logistic regression analysis revealed that high WFNS score(OR:3.25,95％CI:1.11～9.48),high modified Fisher grade(OR:3.66,95％CI:1.08～12.35),shunt dependence(OR:15.56,95％CI:1.22～198.57),and cerebral vasospasm(OR:22.24,95％CI:3.08～160.68)were independent predictors for mRS score,while volume of continuous lumbar drainage(OR:0.57,95％CI:0.40～0.82)was an independent protective factor.ROC curve analysis indicated a good predictive performance of the model(AUC=0.898,95％CI:0.935～0.861).Internal validation through Bootstrap method demonstrated excellent discriminatory ability of the model(C-index=0.950,95％CI:0.904～0.996;adjusted C-index:0.934).Conclusion Increased volume of lumbar drainage is an independent protective factor for poor prognosis following aSAH and can improve the prognosis of SAH patients.

Objective: To explore the biological effects of electromagnetic pulse (EMP) with different high intensities on condylar cartilage in rats. Methods: SD rats were randomly divided into a sham group (Sham) and an irradiation group (EMP1: 500 kV/m, 10 Hz; EMP2: 270 kV/m, 10 Hz). Then, they were sacrificed at 1 h, 3 h, 12 h, 24 h and 3 d after irradiation. The degree of cartilage degeneration was evaluated by HE, safranine O-fast green, type Ⅱ collagen immunohistochemistry and TUNEL staining. Immunohistochemistry and western blot were performed to detect the expression of the matrix degradation factors: matrix metalloproteinase-13 (MMP-13), a disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS-5) and the apoptosis key factor cleaved-cysteinyl aspartate specific proteinase (cleaved-Caspase3) in condylar cartilage. Results : HE staining showed that, compared with the Sham group, a small amount of exfoliation was found on the fibrous surface layer of the cartilage after irradiation in the EMP1 and EMP2 groups. Compared with the Sham group, the percentage of safranine O-fast green-positive area decreased significantly at 12 h and 24 h (both P<0.01) in the EMP1 group and 12 h and 24 h in the EMP2 group (both P<0.05); the percentage of type Ⅱ collagen-positive area decreased significantly at 3 h and 12 h (P<0.05, P<0.001) in the EMP1 group. In addition, the number of TUNEL-positive apoptotic cells increased significantly at 1 h, 3 h, 12 h, and 24 h in the EMP1 group and 1 h, 3 h, and 12 h in the EMP2 group (P<0.05). Moreover, at different timepoints (except at 3 d) in the EMP1 group and EMP2 group, the percentage of MMP-13, ADAMTS-5- and cleaved Caspase3-positive chondrocytes and their protein levels in condylar cartilage increased significantly after irradiation (P<0.05). Conclusion EMP with a certain degree of high-intensity can induce early transient damage to condylar cartilage. This effect is dose-and time-dependent.