OBJECTIVETo examine the growth-inhibitory, apoptosis- and necrosis-inducing effects of realgar nano-particles (RNP) in human chronic myelogenous leukemia cell line K562 and acute myeloid leukemia cell line HL-60, and to find out the chemical species with efficacy.

METHODA "solvent-relay" strategy was used for the preparation of RNP suspension. Cell viability was determined by MTT assay. Cell apoptosis and necrosis were characterized with Annexin V-PI double staining in association with flow cytometry and with morphological examination with Hoechst 33258 staining. Parallel experiments with arsenous acid (H3AsO3), the dominant form of arsenic trioxide in the solution, were conducted for comparison.

RESULTThe mean diameter of RNP was 159.0 nm. RNP showed growth-inhibitory effect on both cell lines. The double staining test indicated that RNP induced both apoptosis and necrosis, and this was further confirmed by morphological examination.

CONCLUSIONRNP induced both apoptosis and necrosis in leukemia cell lines K562 and HL-60. Thioarsenite species with both As-O and As-S bonds may be the active intermediates in the RNP.

Antineoplastic Agents ; administration & dosage ; pharmacology ; Apoptosis ; drug effects ; Arsenicals ; administration & dosage ; pharmacology ; Cell Proliferation ; drug effects ; HL-60 Cells ; pathology ; Humans ; K562 Cells ; pathology ; Materia Medica ; administration & dosage ; pharmacology ; Nanotechnology ; Necrosis ; Particle Size ; Sulfides ; administration & dosage ; pharmacology

OBJECTIVEAs a new technique of biomedical imaging, the optical in vivo imaging has been used in many research fields of biological processes, such as analyzing gene expression pattern, observing action of drug target. For extending its application field, this technique is initially used to investigate the effect of acupuncture in this study.

METHODSSeven SPF mice were randomly divided into an acupuncture group (4 cases) and a control group (3 cases). Fluorescent labeling Cy7 (Tf-Cy7) and Doxorubicin (Dox) were injected into the caudal vein of the nude mice, respectively. With the.stabilized distribution of Tf-Cy7 and Dox in vivo, "Yaoyangguan" (GV 3) point was acupunctured in the acupuncture group. The animals in the control group were not acupunctured. Then, the fluorescent irradiance of Tf-Cy7 and Dox was displayed by the optical in vivo imaging, the effect of acupuncture was analyzed.

RESULTS(1) After acupuncture, the fluorescent intensity of Tf-Cy7 started to decrease in the blood-brain barrier and heart, but tended to increase in the liver and spleen, in which the highest intensity of Tf-Cy7 was demonstrated at 50 min during the acupuncture. It was obviously different from that of the control group. (2) The fluorescent intensity of Dox tended to increase in the brain and lung after 20 min of acupuncture, and reached the highest concentration at 30 min.

CONCLUSIONAcupuncture can influence the action of Tf-Cy7 targeting and distribution of Dox, which is clearly showed with the optical in vivo imaging. Thus, this technique provides a new approach for the acupuncture and meridian research.

Acupuncture ; Animals ; Blood-Brain Barrier ; physiology ; Female ; Heart ; physiology ; Liver ; physiology ; Male ; Mice ; Mice, Nude ; Molecular Imaging ; methods ; Pilot Projects ; Random Allocation ; Research Design ; Specific Pathogen-Free Organisms

The aim of this study was to investigate the regulation of 5-aza-CdR on transcription of SHP-1 gene and effects on the proliferation and apoptosis of K562 cells. Methylation-specific PCR (MSP) was used to detect CpG island methylation in SHP-1 promoter. MTT and flow cytometry were used to detect the growth and apoptosis of K562 cells after treatment with different concentration of 5-aza-CdR. The expressions of SHP-1 mRNA and protein were determined by FQ-PCR and Western blot. The expression of p-JAK2 was assayed by Western blot. The result showed that methylation of SHP-1 gene promoter was detected in K562 cells, and the SHP-1 mRNA and protein were expressed again in K562 cells after treatment with 5-aza-CdR, meanwhile the expression of phosphorylated P-JAK2 was down-regulated; 5-aza-CdR significantly inhibited the cell growth in dose and time dependent manners. AG490 inhibited the cell proliferation. 5-aza-CdR increased the apoptosis rate of K562 cells also in dose- and time-dependent manners. The apoptosis rates of K562 cells treated with 5-aza-CdR for 1, 3 and 5 days were 9.3%, 24.2% and 37.7% respectively. After treatment with 2 micromol/L 5-aza-CdR for 24 hours, cells in G(0)/G(1) phase increased gradually, cells in G(2)/M phase decreased gradually, cells were arrested in G(0)/G(1) phase. The cell ratios in G(2)/M phase at 1, 3 and 5 days after treatment with 5-aza-CdR were 30.7%, 23.45 and 19.3% respectively. It is concluded that the 5-aza-CdR, inhibitor of specific methylation transferase, can re-express the silent SHP-1 gene in K562 cells, inhibits the proliferation of leukemia cells and induces cell apoptosis by activating JAK/STAT pathway.
Apoptosis ; drug effects ; Azacitidine ; analogs & derivatives ; pharmacology ; Cell Proliferation ; drug effects ; DNA Methylation ; drug effects ; Gene Expression Regulation, Leukemic ; drug effects ; Humans ; K562 Cells ; Protein Tyrosine Phosphatase, Non-Receptor Type 6 ; genetics ; metabolism

Human thioredoxin reductase (TrxR) system is associated with cancer cell growth and anti-apoptosis process. Effects of 1,2-[bis(1,2-benzisoselenazolone-3(2H)-ketone)]ethane (BBSKE), a novel TrxR inhibitor, were investigated on human leukemia cell lines HL-60 and K562. BBSKE treatment induced cell growth inhibition and apoptosis in both cell lines. Apoptosis induced by BBSKE is through Bcl-2/Bax and caspase-3 pathways. Ehrlich's ascites carcinoma-bearing mice were used to investigate the anti-tumor effect of BBSKE in vivo. Tumor-bearing mice treated with BBSKE showed an increase of life span with a comparable effect to cyclophosphamide (CTX). These results suggest a potential usage of BBSKE as a therapeutic agent against non-solid tumors.
Apoptosis ; drug effects ; Bridged Bicyclo Compounds, Heterocyclic ; pharmacology ; Cell Proliferation ; drug effects ; Enzyme Inhibitors ; pharmacology ; HL-60 Cells ; Humans ; K562 Cells ; Organoselenium Compounds ; pharmacology ; Proto-Oncogene Proteins c-bcl-2 ; physiology ; Thioredoxin-Disulfide Reductase ; antagonists & inhibitors ; bcl-2-Associated X Protein ; physiology

Objective To investigate the environmental contamination related to first patient with carbapenem-re-sistant Acinetobacter baumannii(CRAB)infection and the infection status of relevant patients in a newly established intensive care unit(ICU)of a hospital in Tibetan area,and analyze the transmission risk.Methods From the ad-mission in ICU of a patients who was first detected CRAB on November 15,2021 to the 60th day of hospitalization,all patients who stayed in ICU for＞48 hours were performed active screening on CRAB.On the 30th day and 60th day of the admission to the ICU of the first CRAB-infected patient,environment specimens were taken respectively 2 hours after high-frequency diagnostic and therapeutic activities but before disinfection,and after disinfection but before medical activities.CRAB was cultured with chromogenic culture medium.Results Among the 13 patients who were actively screened,1 case was CRAB positive,he was transferred from the ICU of a tertiary hospital to the ICU of this hospital on November 19th.On the 40th day of admission to the ICU,he had fever,increased frequency for sputum suction,and CRAB was detected.The drug sensitivity spectrum was similar to that of the first case,and he also stayed in the adjacent bed of the first case.64 environmental specimens were taken,and 9 were positive for CRAB,with a positive rate of 14.06％,8 sampling points such as the washbasin,door handle and bed rail were positive for CRAB after high-frequency diagnostic and therapeutic activities.After routine disinfection,CRAB was detected from the sink of the washbasin.Conclusion For the prevention and control of CRAB in the basic-level ICU in ethnic areas,it is feasible to conduct risk assessment on admitted patients and adopt bundled prevention and con-trol measures for high-risk patients upon admission.Attention should be paid to the contaminated areas(such as washbasin,door handle,and bed rail)as well as the effectiveness of disinfection of sink of washbasin.

Objective To analysis the change of hip joint in healthy infants by ultrasound,and establish the normal reference value of the developmental dysplasia of the hip(DDH). Methods A total of 8 000 healthy infants from 0 to 24 weeks were collected from the Multi-center study of 10 children′s medical centers. Among them,3 855 infants(2 065 females and 1 790 males) with complete data and follow-up were included in this study. All subjects were divided into 6 groups ( ＜4,4～7,8～11,12～15,16～19 and≥20 weeks group). α angle,femoral head length and width,femoral head coverage ratio by acetabulum ( FHC) were measured in the coronal view on the neutral position;distance from pubis to femoral head ( P-H) and distance from ischium to femoral head ( I-H ) were measured in the transverse view on neutral position;distance from femoral head topubis ( H-P) was measured in the posterolateraltransverse view on the flexion position. The results of each group changes with age were analysised. Results ① The α angle of healthy infants from 0 to 20 weeks were increased with age,the difference among the groups were statistically significant( P ＜0.05),but there was no significant difference between 16～19 and ≥20 weeks group( P ＞0.05). ②The femoral head length and width of all age groups were increased with age,the difference among all the groups was statistically significant( all P ＜0.05). ③ FHC from 0 to 20 weeks were increased with age,the difference among the groups were statistically significant( P ＜0.05) except between 16～19 and ≥20 weeks group( P ＞0.05). ④ The P-H and I-H in all age groups showed no statistically significant ( all P＞0.05). ⑤The H-P of all age groups were increased with age,the difference between the groups were statistically significant(all P ＜0.05).Conclusions The development of hip joints have the certain regular developmental pattern in healthy infants less than 5 months of birth and are relatively constant after birth more than 5 months. The ultrasound normal reference value of the hip joints can be used for the early diagnosis of the DDH.

Objective:To compare the aortic remodeling of the Fabulous stent system and standard thoracic aortic endovascular repair (TEVAR) on distal aorta type B aortic dissection (TBAD). Methods:The prospective data collected between Dec 2017 and Oct 2019 from 134 patients with type B aortic dissection (TBAD) who underwent treatment with the "Fabulous" stent system, and retrospective data from 159 TBAD patients receiving standard TEVAR from corresponding multicenter. By using propensity score matching analysis, we compared the prognosis and aortic remodeling outcomes in patients undergoing Fabulous and standard TEVAR treatments during a 1-year postoperative follow-up.Results:In this study, 62 patients in Fabulous group and 62 patients in standard TEVAR were included.There were no significant statistical differences in baseline characteristics between the two groups. In terms of aortic remodeling in bare stent region, Fabulous group had better change trends of diameter of true lumen [10.6 (4.4, 14.5) mm vs. 4.7 (0.9, 10.7) mm, P=0.001] and false lumen [-24.2 (-30.5, -4.9) mm vs. 0.7 (-11.8, 2.3) mm, P<0.001] than those in the standard TEVAR group. The rate of complete false lumen thrombosis was also higher in the Fabulous group (62.9% vs. 37.1%, P=0.042). Conclusion:The Fabulous stent system, when compared to standard TEVAR surgery, demonstrates good aortic remodeling outcomes in the distal aorta.

To investigate the chemical constituents of the endophytic fungus Penicillium sp. FJ-1 of Ceriops tagal, the chemical constituents were isolated by column chromatography on silica gel and Sephadex LH-20. Their structures were elucidated on the basis of spectroscopic analysis. Their antibacterial activity was tested by paper disco diffusion method. Two compounds were isolated and identified as 7-hydroxy-deoxytalaroflavone (1), and deoxytalaroflavone (2). Compound 1 is a new compound, and compounds 1 and 2 showed weak activity against Staphylococcus aureus and methicillin-resistant Staphylococcus aureus.
Anti-Bacterial Agents ; chemistry ; isolation & purification ; pharmacology ; Flavones ; chemistry ; isolation & purification ; pharmacology ; Methicillin-Resistant Staphylococcus aureus ; drug effects ; Molecular Structure ; Penicillium ; chemistry ; isolation & purification ; Rhizophoraceae ; microbiology ; Staphylococcus aureus ; drug effects

Objective To analyze the status of quality indicators(QI) on specimen acceptability and establish preliminary qual ity specification.Methods Web based External Quality Assessment system was used to collect data of laboratories partici pated in "Medical quality control indicators in clinical laboratory" from 2015 to 2017,including once in 2015 and 2017 and twice in 2016.Rate and sigma scales were used to evaluate incorrect sample type,incorrect sample container,incorrect fill level and anticoagulant sample clotted.The 25th percentile (P25) and 75th percentile (P75) of the distribution of each QI were employed to establish the high,medium and low specification.Results 5 346,7 593,5 950 and 6 874 laboratories sub mitted the survey results respectively.The P50 of biochemistry (except incorrect fill level),immunology and microbiology reach to 6σ.The P50 of clinical laboratory is 4 to 6σ except for incorrect sample container.There is no significant change of the continuous survey results.Based on results in 2017 to establish the quality specification,the P25 and P75 of the four QIs is 0 and 0.084 4 ％,0 and 0.047 6 ％,0 and 0.114 2 ％,0 and 0.078 4 ％,respectively.Conclusion According to the results of the survey,most laboratories had a faire performance in biochemistry,immunology and microbiology,and clinical laboratory needs to be strengthened.Laboratories should strengthen the laboratory information system construction to ensure the actual and reliable data collection,and make a long time monitoring to achieve a better quality.

AIM: To study the chemical constituents from the fermentation of the endophytic fungus HP-1 of Chinese eaglewood. METHODS: The chemical constituents were isolated by column chromatography on silica gel and Sephadex LH-20, and their structures were elucidated on the basis of spectroscopic analysis. RESULTS: Four compounds were isolated and identified as 3α, 3β, 10β-trimethyl-decahydroazuleno[6, 7]furan-8, 9, 14-triol (1), 4-hydroxyphenylacetic acid (2), 4-hydroxyphenethyl alcohol (3), and 5-hydroxymethyl-2-furancarboxaldehyde (4). CONCLUSION Compound 1 was a new compound. Compound 2 showed antibacterial activity against Staphylococcus aureus.
Anti-Bacterial Agents ; chemistry ; isolation & purification ; pharmacology ; Endophytes ; chemistry ; Fungi ; chemistry ; Phenylacetates ; chemistry ; isolation & purification ; pharmacology ; Sesquiterpenes ; chemistry ; isolation & purification ; Thymelaeaceae ; microbiology ; Wood ; microbiology