Aim To research into the effect of quercetin on coronary artery(CA) damage in diabetic rats and its relationship with Kv1.5.Methods Thirty male rats were randomly divided into blank control group, diabetes group and diabetes group + quercetin group.The effects of quercetin on heart coronary flow (CF) in diabetes rat were observed by CF measurement;the effects of quercetin on CA tension in diabetes rat were detected by CA tension measurement.To investigate the mechanism of quercetin improving CA lesions caused by diabetes, Kv currents of CA VSMC in rats were recorded using whole cell patch clamp, and Kv1.5 mRNA of CA VSMC was determined.Results Compared with normal group, CF of diabetic rats dropped significantly, and CF could increase with the supplement of quercetin in rat diet;the maximum contraction amplitude of CA in response to the contraction of KCl could be reduced with supplement of quercetin in diabetic rat dietary;compared with diabetes group, the contraction of CA from diabetes + quercetin to 4-AP significantly decreased;compared with blank control group, CA VSMC Kv currents of diabetes group had a significant decrease(P<0.05), and dietary supplement of quercetin could improve the above changes;RT-PCR results indicated that the expression of Kv1.5 mRNA on rat CA was the highest in control group, then in diabetes group and the lowest in diabetes+quercetin group.Conclusion Quercetin has protective effect on coronary muscle damage caused by diabetes, which maybe related to Kv1.5 channel.

Objective To investigate the regulating effect of heat reinforcing acupuncture manipulation on body energy metabolism enzymes in rheumatoid arthritis (RA) and preliminarily explain the mechanism of heat-producing action of heat reinforcing acupuncture manipulation. Method Forty chinchilla rabbits were randomized into normal, model, equal reinforcement and reduction, twirling reinforcement, and heat reinforcing acupuncture manipulation groups. A model of cold syndrome-type RA was made by ovalbumin induction and exposure to low temperature in the other four groups not including the normal group. From two days after successful model making, the normal and model groups were grabbed and fastened (bound) by the same way as for the acupuncture groups, 30 min once daily. The equal reinforcement and reduction group received even reinforcing-reducing method;the twirling reinforcement group, twirling reinforcement method;the heat reinforcing group, heat reinforcing acupuncture manipulation. The needle was manipulated for 1 min and retained for 30 min once daily, for a total of seven days. The RA rabbit knee joint circumference was measured and the inflammation score was recorded according to synovial histopathological sections before and after treatment. After the completion of intervention, the rabbits were sacrificed and the articular synovium was rapidly separated for frozen sections. Articular synovium lactate dehydrogenase (LDH), succinate dehydrogenase (SDH) and cytochrome oxidase (CCO) activities were measured by histochemical staining. Result After acupuncture intervention, the RA rabbit knee joint circumference was shortened in all the equal reinforcement and reduction, twirling reinforcement, and heat reinforcing acupuncture manipulation groups, but the shortening effect on the RA rabbit knee joint circumference was better in the heat reinforcing acupuncture manipulation group than in the equal reinforcement and reduction and twirling reinforcement method groups (P<0.05);the inflammation score recorded according to the RA rabbit synovial histopathological sections was also decreased more in the heat reinforcing acupuncture manipulation group than in the equal reinforcement and reduction and twirling reinforcement method groups (P<0.05). Synovial LDH integral optical density, total positive area and area percentage were significantly higher in the model group than in the normal group (P<0.05), and significantly lower in the equal reinforcement and reduction, twirling reinforcement, and heat reinforcing acupuncture manipulation groups than in the model group(P<0.05) and also in the heat reinforcing acupuncture manipulation group than in the equal reinforcement and reduction and twirling reinforcement method groups (P<0.05). Rabbit synovial SDH and CCO activities were significantly higher in the model group than in the normal group (P<0.05). Rabbit synovial SDH and CCO integral optical density, total positive area and area percentage were significantly higher in the equal reinforcement and reduction, twirling reinforcement, and heat reinforcing acupuncture manipulation groups than in the model group (P<0.05) and also in the heat reinforcing acupuncture manipulation group than in the equal reinforcement and reduction and twirling reinforcement method groups (P<0.05). Conclusion Heat reinforcing acupuncture manipulation has a definite therapeutic effect on RA and can increase SDH and CCO activities to enhance aerobic metabolism and produce more local energy in a rabbit model of RA. That may be the mechanism by which heat reinforcing acupuncture manipulation produces heat.

Objectives To analyze the diagnosis and management of steroid-resistant nephrotic syndrome (SRNS) accompanied with irreversible leukoencephalopathy in children. Methods The clinical, laboratory and imaging data were retrospectively analyzed in a SRNS child accompanied with irreversible leukoencephalopathy. A literature review was performed. Results After clinical diagnosis of SRNS, glucocorticoid, immunosuppressant, and hemodialysis were administrated for 10 months. During the course of treatment, the seizures, visual problems, and hypertension were repeatedly occured. The cranial MRI showed bilateral occipital parietal lobe hyperintensity and right frontotemporal lobe hyperintensity on T2-weighted imaging and bilateral occipital parietal lobe hypointensity on T2-Flair imaging, which indicated that encephalomalacia was accompanied with gliosis. Conclusions A variety of reasons may induce leukoencephalopathy in children. The accompanied irreversible leu-koencephalopathy should be strongly considered in management of SRNS.

Purple urine bag syndrome (PUBS) is a rare phenomenon characterized by purple discoloration of the urinary catheter bag following long-term urinary catheterization.Bacterial strains such as as Klebsiella pneumoniae,Escherichia coli,Morganella morganii,Proteus mirabilis,and Streptococcus agalactiae have been found to be associated with PUBS.Although case series have been reported worldwide,only three PUBS cases have been discribed in Chinese literature,and all of them were associated with Escherichia coli.This article reports the first Klebsiella pneumoniae-associated PUBS case in China.

Objective:To investigate the clinicopathological characteristics of dedifferentiated endometrial carcinoma/undifferentiated endometrial carcinoma (DDEC/UDEC) with loss of expression of SMARCA4.Methods:A total of 10 cases with loss of expression of SMARCA4 were diagnosed at Fujian Cancer Hospital between January 2019 and December 2023. A retrospective analysis was conducted on the clinical characteristics, morphology, immunophenotype, molecular classification, and prognosis.Results:(1) Clinical characteristics: among 10 cases of DDEC/UDEC with loss of expression of SMARCA4, the patients′ age ranged from 48 to 65 years, with a median age of 56 years.Five cases were classified as International Federation of Gynecology and Obstetrics (FIGO) stages Ⅰ-Ⅱ, while the remaining five were categorized as stages Ⅲ-Ⅳ. (2) Pathological features: tumor cells exhibited poor cell adhesion, with common intravascular tumor emboli (8/10), occasional vacuolated nuclei (6/10), rhabdoid cells (4/10), and starry sky phenomenon formed by tissue cell phagocytosis apoptosis bodies or fragments (4/10). Six cases (6/10) showed loss of mismatch repair (MMR) protein expression, two cases (2/10) exhibited p53 mutant expression, and five cases (5/10) tested positive for programmed cell death ligand 1 (PD-L1). (3) Molecular subtyping: molecular subtyping revealed POLEmut in 1 case (1/10), mismatch repair deficient (MMR-d) in 5 cases (5/10), p53 abn in 1 case (1/10), and no specific molecular profile (NSMP) in 3 cases (3/10). (4) Prognosis: the follow-up period ranged from 7 to 42 months, with a median of 20 months. Five patients succumbed to the tumor, whereas the remaining five exhibited no recurrence during subsequent postoperative evaluations. The 2-year progression-free survival rates and overall survival rates were 58.3% and 52.5%, respectively.Conclusions:Loss of expression of SMARCA4 occurs in approximately 1/5 of DDEC/UDEC, which presents with an aggressive clinical course and a poor prognosis. About half of them show MMR protein loss expression and PD-L1 positive expression, suggesting that there might be benefit from treatment with immune checkpoint inhibitors.