Purpose:To evaluate the efficacy and toxicity of combination of MabThera and CEOP regimen in the treatment of aggressive B-cell lymphoma. Methods:21 patients diagnosed as aggressive B-cell lymphoma with median age of 48 years old (from 15 to 68 years old),received the treatment of MabThera plus CEOP regimen. This treatment consisted of MabThera 375 mg/m2 intravenously infusion on day 1,cyclophosphamide 750 mg/m 2 ,epirubicin 60 mg/m 2 ,vincristine 2 mg on day3 ,prednisone 40 mg/m 2 orally taken on day 3～7. Results:In all 21 patients,16 (76.2%) complete response and 3 (14.2%) partial response were observed. Thus,the overall response rate was 90.5%. Moreover,of the remaining patients,1(4.8%) achieved stable disease and 1(4.8%) had progressive disease. In the 19 responsive patients,the follow-up duration were from 2 to 15 months. One case of thyroid lymphoma experienced recurrence after 14 months with complete response. Until now,the other responses have been maintained. Only one dose of MabThera infusion related-toxicity was observed in all who received 87 cycles. The hematological toxicities were mainly leucopenia and neutropenia. 5( 23.8% ) experienced 3-4 grade neutropenia. Only 1 patient developed neutropenia fever. The other non-hematological toxicities were 1-2 grade except grade 3 alopecia. Conclusions:The combination of MabThera and CEOP regimen had high efficacy with mild toxicity in the treatment of aggressive B-cell lymphoma,hopefully may become the standard treatment.

Purpose:To investigate the efficacy and adverse effects of irinotecan, a novel and potent inhibitor of topoisomerase Ⅰ, for second line treatment of advanced colorectal cancer.Methods:14 patients who previously failed with fluorouracil treatment received single drug irinotecan 300 mg/m 2 intravenously every 3 weeks . All patients had received adjuvant therapy containing fluorouracil. Two patients had received pelvic radiotherapy.Results:Nine patients had received three cycles and five patients completed six cycles . Ten cases had stable disease, and four with progressive disease were observed among the 14 patients. The common treatment related adverse events were cholinergic syndrome (92.9%) ,delayed diarrhea (78.6%) and neutropenia (78.6%) . Grade Ⅲ side effects occurred in several patients: two nausea/ vomiting , two delayed diarrhea and one neutropenia / leucytopenia . Only one patient developed grade Ⅳ diarrhea.Conclusions: Irinotecan is an active drug in the treatment of advanced colorectal cancer with acceptable toxicity.

Objective To analyze the social and family factors influencing rehabilitation of mental retarded children.Methods 237 children diagnosed as mental retardation in 2004 in Beijing were researched with Self-designed Questionnaires and data were analyzed by Cross-tabs and Logistic Regression statistical method.Results The analysis showed that the degree of disabilities (P<0.001), education received (P<0.05), and the attitude from community to these children (P<0.05), were factors influencing rehabilitation of mental retarded children.Conclusion The degree of disabilities is the most important influencing factor to rehabilitation of mental retarded children; the mild or moderate mental cases can get good rehabilitation in a better community and family environment. The attitude to these children from community can make a great help to the rehabilitation.

Objective To investigate the needs of rehabilitations in persons with mental retardation in Beijing.Methods 738 persons with mental retardation surveyed in the Second China National Sample Survey on Disability were involved,their rehabilitation condition and requisition were evaluated.Results 63.69% of them needed rehabilitation in community and family,73.31% needed rehabilitation training,their needs on medical service were met,needs on rehabilitation training were above provided service,needs on assistance articles and utensils were low,and needs on employment were high.Conclusion The case management system for persons with mental retardation should be built to meet their rehabilitation requisitions on different age and grade with various approaches.

Background and purpose:Although there is still no standard ifrst line chemotherapy regimen for metastatic gastric cancer (MGC), the doublet and triplet regimens containing platinum and lfuorouracil were most popular worldwidely. The ECF regimen is the classical and one of the most popular treatment choices in this setting, while the marrow suppression, the renal toxicity and poor compliance inhibits its usage. In order to improve its efifcacy and tolerability, this study conducted 2 phaseⅡ trials by modified ECF regimen, the EOF5 regimen (substituting cisplatin with oxaliplatin, shortening the continuous infusion period to 120 h), to treat patients with MGC since 2004. This paper reported the comprehensive results of the 2 studies.Methods:All the patients who enrolled in our previous2 phaseⅡ trials and received EOF5 as ifrst line treatment entered this study. Each patient received the treatment of epirubicin 50 mg/m2 iv d1, oxaliplatin 130 mg/m2 iv gtt d1 and 5-FU 375-425 mg/m2·d-1 civ 120 h, and repeated every 3 weeks. Efifcacy was analyzed every 6 weeks.Results:A total number of 178 patients (all were metastatic patients but 2 advanced patients with unresectable lesions) were included into this study. One hundred and seventy patients were evaluable, and 7 patients (3.9%) achieved complete response (CR), 76 patients (42.7%) achieved partial response (PR), 46.6% patients achieved overall response rate (ORR, CR+PR), and the cases of stable disease (SD) and progressive disease (PD) were 69 (38.8%) and 18 (10.1%), respectively. The median progress free survival (PFS) and overall survival (OS) were 6.0 months (95%CI: 5.2-6.8) and 12.6 months (95%CI: 8.9-16.3), 1-year and 2-year survival rate were 50.9% and 28.0%, respectively. Grade 3, 4 toxicity including: leucopenia (23.0), neutropenia (38.8%), anemia (6.5%), thrombocytopenia (23.5%), nausea/vomiting (14.1%), and peripheral neuropathy toxicity (1.2%). Among 75 patients who received second line treatment, the median survival from second line treatment was 8.0 months (95%CI: 4.8-11.2).Conclusion:EOF5 regimen is a highly effective regimen with moderate and manageable toxicity, and it providesa suitable alternative for the ifrst-line treatment of MGC.

Objective To introduce and enhance an experimental technique for intraventricular drug delivery via an implantable osmotic pump.Methods Eight-week-old male SD rats were selected and the requisite equipment and reagents were prepared.The osmotic pump was assembled and brought to operational status before conducting the implantation surgery.Following anesthesia,the rats underwent skin preparation and the upper surface of the skull was surgically exposed.A point directly above the ventricle was located using a brain stereotaxic apparatus,and a small hole was drilled at that location with a high-speed cranial drill.The pump body was then implanted subcutaneously in the neck and the needle was inserted into the drilled hole,and secured with dental cement.Once solidified,the needle base was removed,the subcutaneous soft tissue and scalp were sutured in layers,and the animal was returned to its cage for rearing in isolation.Results The osmotic pump was successfully implanted subcutaneously in the rat's neck,the needle was securely fixed to the skull,and the catheter interface remained intact.The rats were sacrificed and the brain tissue was removed.Examination of the extracted brain tissue revealed no significant hematoma around the puncture site or needle tract,and the presence of blue dye in the ventricular and adjacent tissues indicated successful drug delivery to the ventricle.Conclusions The introduction of a brain stereotaxic apparatus to aid localization,coupled with enhancements to the operational procedure,may improve the accuracy and safety of the implantation process resulting in a high success rate for intraventricular drug administration.

Rabdosia serra(R.serra),an important component of Chinese herbal tea,has traditionally been used to treat hepatitis,jaundice,cholecystitis,and colitis.However,the chemical composition of R.serra and its effect against colitis remain unclear.In this study,the chemical composition of the water extract of R.serra was analyzed using ultra performance liquid chromatography coupled with a hybrid linear ion trap quadrupole-orbitrap mass spectrometer(UPLC-LTQ-Orbitrap-MS).A total of 46 compounds,comprising ent-kaurane diterpenoids,flavonoids,phenolic acids,and steroids,were identified in the water extract of R.serra,and the extract could significantly alleviate dextran sulfate sodium salt-induced colitis by improving colon length,upregulating anti-inflammatory factors,downregulating proinflammatory fac-tors,and restoring the balance of T helper 17/T regulatory cells.R.serra also preserved intestinal barrier function by increasing the level of tight junction proteins(zonula occludens 1 and occludin)in mouse colonic tissue.In addition,R.serra modulated the gut microbiota composition by increasing bacterial richness and diversity,increasing the abundance of beneficial bacteria(Muribaculaceae,Bacteroides,Lactobacillus,and Prevotellaceae_UCG-O01),and decreasing the abundance of pathogenic bacteria(Turi-cibacter,Eubacterium_fissicatena_group,and Eubacterium_xylanophilum_group).Gut microbiota depletion by antibiotics further confirmed that R.serra alleviated colitis in a microbiota-dependent manner.Overall,our findings provide chemical and biological evidence for the potential application of R.serra in the management of colitis.

Objective:To report the results of national surveillance on the distribution and antimicrobial resistance profile of clinical Gram-negative bacteria isolates from bloodstream infections in China in 2022.Methods:The clinical isolates of Gram-negative bacteria from blood cultures in member hospitals of national bloodstream infection Bacterial Resistant Investigation Collaborative System（BRICS）were collected during January 2022 to December 2022. Antibiotic susceptibility tests were conducted by agar dilution or broth dilution methods recommended by Clinical and Laboratory Standards Institute（CLSI）. WHONET 5.6 and SPSS 25.0 software were used to analyze the data.Results:During the study period，9 035 strains of Gram-negative bacteria were collected from 51 hospitals，of which 7 895（87.4%）were Enterobacteriaceae and 1 140（12.6%）were non-fermenting bacteria. The top 5 bacterial species were Escherichia coli（ n=4 510，49.9%）， Klebsiella pneumoniae（ n=2 340，25.9%）， Pseudomonas aeruginosa（ n=534，5.9%）， Acinetobacter baumannii complex（ n=405，4.5%）and Enterobacter cloacae（ n=327，3.6%）. The ESBLs-producing rates in Escherichia coli， Klebsiella pneumoniae and Proteus spp. were 47.1%（2 095/4 452），21.0%（427/2 033）and 41.1%（58/141），respectively. The prevalence of carbapenem-resistant Escherichia coli（CREC）and carbapenem-resistant Klebsiella pneumoniae（CRKP）were 1.3%（58/4 510）and 13.1%（307/2 340）；62.1%（36/58）and 9.8%（30/307）of CREC and CRKP were resistant to ceftazidime/avibactam combination，respectively. The prevalence of carbapenem-resistant Acinetobacter baumannii（CRAB）complex was 59.5%（241/405），while less than 5% of Acinetobacter baumannii complex was resistant to tigecycline and polymyxin B. The prevalence of carbapenem-resistant Pseudomonas aeruginosa（CRPA）was 18.4%（98/534）. There were differences in the composition ratio of Gram-negative bacteria in bloodstream infections and the prevalence of main Gram-negative bacteria resistance among different regions，with statistically significant differences in the prevalence of CRKP and CRPA（ χ2=20.489 and 20.252， P<0.001）. The prevalence of CREC，CRKP，CRPA，CRAB，ESBLs-producing Escherichia coli and Klebsiella pneumoniae were higher in provinicial hospitals than those in municipal hospitals（ χ2=11.953，81.183，10.404，5.915，12.415 and 6.459， P<0.01 or <0.05），while the prevalence of CRPA was higher in economically developed regions（per capita GDP ≥ 92 059 Yuan）than that in economically less-developed regions（per capita GDP <92 059 Yuan）（ χ2=6.240， P=0.012）. Conclusions:The proportion of Gram-negative bacteria in bloodstream infections shows an increasing trend，and Escherichia coli is ranked in the top，while the trend of CRKP decreases continuously with time. Decreasing trends are noted in ESBLs-producing Escherichia coli and Klebsiella pneumoniae. Low prevalence of carbapenem resistance in Escherichia coli and high prevalence in CRAB complex have been observed. The composition ratio and antibacterial spectrum of bloodstream infections in different regions of China are slightly different，and the proportion of main drug resistant bacteria in provincial hospitals is higher than those in municipal hospitals.

Objective:To investigate the distribution and antimicrobial resistance profile of clinical bacteria isolated from blood culture in China.Methods:The clinical bacterial strains isolated from blood culture from member hospitals of Blood Bacterial Resistant Investigation Collaborative System (BRICS) were collected during January 2018 to December 2019. Antibiotic susceptibility tests were conducted with agar dilution or broth dilution methods recommended by US Clinical and Laboratory Standards Institute (CLSI). WHONET 5.6 was used to analyze data.Results:During the study period, 14 778 bacterial strains were collected from 50 hospitals, of which 4 117 (27.9%) were Gram-positive bacteria and 10 661(72.1%) were Gram-negative bacteria. The top 10 bacterial species were Escherichia coli (37.2%), Klebsiella pneumoniae (17.0%), Staphylococcus aureus (9.7%), coagulase-negative Staphylococci (8.7%), Pseudomonas aeruginosa (3.7%), Enterococcus faecium (3.4%), Acinetobacter baumannii(3.4%), Enterobacter cloacae (2.9%), Streptococci(2.8%) and Enterococcus faecalis (2.3%). The the prevalence of methicillin-resistant S. aureus (MRSA) and methicillin-resistant coagulase-negative Staphylococcus were 27.4% (394/1 438) and 70.4% (905/1 285), respectively. No glycopeptide-resistant Staphylococcus was detected. More than 95% of S. aureus were sensitive to amikacin, rifampicin and SMZco. The resistance rate of E. faecium to vancomycin was 0.4% (2/504), and no vancomycin-resistant E. faecalis was detected. The ESBLs-producing rates in no carbapenem-resistance E. coli, carbapenem sensitive K. pneumoniae and Proteus were 50.4% (2 731/5 415), 24.6% (493/2001) and 35.2% (31/88), respectively. The prevalence of carbapenem-resistance in E. coli and K. pneumoniae were 1.5% (85/5 500), 20.6% (518/2 519), respectively. 8.3% (27/325) of carbapenem-resistance K. pneumoniae was resistant to ceftazidime/avibactam combination. The resistance rates of A. baumannii to polymyxin and tigecycline were 2.8% (14/501) and 3.4% (17/501) respectively, and that of P. aeruginosa to carbapenem were 18.9% (103/546). Conclusions:The surveillance results from 2018 to 2019 showed that the main pathogens of bloodstream infection in China were gram-negative bacteria, while E. coli was the most common pathogen, and ESBLs-producing strains were in majority; the MRSA incidence is getting lower in China; carbapenem-resistant E. coli keeps at a low level, while carbapenem-resistant K. pneumoniae is on the rise obviously.

Objective:To investigate the bacterial composition and antimicrobial resistance profile of clinical isolates from bloodstream infections in China.Methods:The clinical bacterial strains isolated from blood culture were collected during January 2020 to December 2020 in member hospitals of Blood Bacterial Resistant Investigation Collaborative System (BRICS). Antibiotic susceptibility tests were conducted by agar dilution or broth dilution methods recommended by Clinical Laboratory Standards Institute(CLSI, USA). WHONET 5.6 was used to analyze data.Results:During the study period, 10 043 bacterial strains were collected from 54 hospitals, of which 2 664 (26.5%) were Gram-positive bacteria and 7 379 (73.5%) were Gram-negative bacteria. The top 10 bacterial species were Escherichia coli (38.6%), Klebsiella pneumoniae (18.4%), Staphylococcus aureus (9.9%), coagulase-negative Staphylococci (7.5%), Pseudomonas aeruginosa (3.9%), Enterococcus faecium (3.3%), Enterobacter cloacae (2.8%), Enterococcus faecalis (2.6%), Acinetobacter baumannii (2.4%) and Klebsiella spp (1.8%). The prevalence of methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-resistant coagulase-negative Staphylococcus aureus were 27.6% and 74.4%, respectively. No glycopeptide- and daptomycin-resistant Staphylococci were detected. More than 95% of Staphylococcus aureus were sensitive to rifampicin and SMZco. No vancomycin-resistant Enterococci strains were detected. Extended spectrum β-lactamase (ESBL) producing Escherichia coli, Klebsiella pneumoniae and Proteus mirabilis were 48.4%, 23.6% and 36.1%, respectively. The prevalence rates of carbapenem-resistance in Escherichia coli and Klebsiella pneumoniae were 2.3% and 16.1%, respectively; 9.6% of carbapenem-resistant Klebsiella pneumoniae strains were resistant to ceftazidime/avibactam combination. The prevalence rate of carbapenem-resistance in Acinetobacter baumannii was 60.0%, while polymyxin and tigecycline showed good activity against Acinetobacter baumannii. The prevalence rate of carbapenem-resistance of Pseudomonas aeruginosa was 23.2%. Conclusions:The surveillance results in 2020 showed that the main pathogens of bloodstream infection in China were gram-negative bacteria, while Escherichia coli was the most common pathogen, and ESBL-producing strains declined while carbapenem-resistant Klebsiella pneumoniae kept on high level. The proportion and the prevalence of carbapenem-resistant Pseudomonas aeruginosa were on the rise slowly. On the other side, the MRSA incidence got lower in China, while the overall prevalence of vancomycin-resistant Enterococci was low.