Taking application of some isolation and purification technologies, such as solvent extraction, preliminary solvent isolation, column chromatographies over silica gel and Sephadex LH-20 gel and preparative HPLC, 10 compounds were obtained from Gynura nepalensis cultivated in the suburban area of Beijing. Their structures were identified by spectroscopic methods and comparison with literature as (3R) -3-hydroxy-β-ionone (1), (3S,5R, 6S, 7E) -5, 6-epoxy-3-hydroxy-7-megastigmen-9-one (2), (+) -boscialin (3), 3, 6-trans-3-hydroxy-α-ionone (4), 3, 6-cis-3-hydroxy-α-ionone (5), 3, 4-cis-3, 4-dihydroxy-β-ionone (6), ethyl caffeate (7), loliolide (8), 1H-indole-3-carbaldehyde (9), and 3-(hydroxyacetyl)indole (10), respectively. All compounds were isolated from the title plant for the first time, and with compounds 1, 2, 4-7, 9 and 10 being isolated from Gynura species for the first time. Structurally, the above compounds 1-6 belong to C13 nor-sesquiterpenoids, sharing the same carbon skeleton of megastigmane. According to this study, they are one of major kinds of chemical constituents of Gynura nepalensis and have important reference value for the investigation on phytotaxonomy of this species.
Asteraceae ; chemistry ; Caffeic Acids ; chemistry ; Cyclohexanones ; Drugs, Chinese Herbal ; chemistry ; Glucosides ; Indoles ; chemistry ; Mass Spectrometry ; Molecular Structure ; Norisoprenoids ; chemistry

Objective To observe the effects of genistein on PCNA expression and cell cycle in fibroblasts derived from human hypertrophic scar in order to explore the mechanism of its inhibition on hypertrophic scar (HS) fibroblast proliferation. Methods The human hypertrophic scar fibroblasts were cultured in vitro. Genistein with various concentrations (25, 50, 100 μmol/L) was co-cultured in the medium for 48 hours. The expression of PCNA was detected with immunocytochemical staining method and the cell cycle was measured with flow cytometry. Results Genistein could significantly decrease PCNA expression in HS fibroblasts, especially when its concentration at 50 μmol/L or 100 μmol/L. The cell percentage of G0～G1 phase decreased with drug′s concentration, and G2～M percentage increased conversely, implying the suspension of mitosis. In 100 μmol/L group, most cells blocked at S phase and a hypodiploid apoptosis peak could be observed ahead of G1 phase. Conclusion Genistein can inhibit the proliferation of human hypertrophic scar by blocking cell division as well as decreasing DNA synthesis.

Objective To study the antigenicity of human thyrotropin receptor(hTSHR)amino terminus (amino acid 29～280)and its association with Graves' disease.Methods Total thyroid RNA was prepared from human normal thyroid tissue.RNA was then reversely transcripted and cDNA was subjected to PCR amplification.PCR product was cloned into pcDNA3.1 and the recombinant plasmid was named pcDNA3.1/hTSHR188～940bp. Balb/c mice were immunized with peDNA3.1/hTSHR188～940bp. The levels of serum thyroxin,anti-TSHR antibody(TRAb)and thyroid stimulating antibody(TSAb)were measured,and the pathological changes of thyroid tissue were also observed.Results A 753 bp fragment encoding hTSHR ectodomain amino end was obtained after PCR amplification.Confirmed by Hind Ⅲ restriction enzyme digestion and DNA sequencing,pcDNA3.1/hTSHR188～940bphad been constructed successfully,with the correct sequence and direction of hTSHR188～940bp.In the Balb/c mice treated with pcDNA3.1/hTSHR188～940bp,elevated TRAb in week 6(0.148±0.018)were observed compared with those at week o(0.106±0.006,P＜0.01),and kept a higher level till week 10(0.134±0.011,P＜0.01).T4 and TSAb index values were significantly increased in week 10.Serum T4 concentration increased from(41.02±7.97)μg/L in week 0 to(62.20±12.77)μg/L in week 10(P＜0.01);TSAb index values rose from 0.864±0.076 at week 0 to 1.392±0.615(P＜0.01).Thyroid pathological examination showed that proliferated thyroid follicular epithelial cells and foll icular eapacity increased.Inflammatory cells were occasionally found.Conclusions There are antigen epitopes in hTSHR ectodomain amino acid 29～280,which can stimulate the production of TSAb.And the latter induces hyperthyroidism and Graves' disease like manifestations.It suggests that hTSHR ectodomain amino acid 29～280 is closely associated with Graves' disease,and maybe one of important etiological factors leading to the disease.

BACKGROUND: High mobility group box 1 protein (HMGB1) is a highly conserved, ubiquitous protein in the nuclei and cytoplasm of nearly all cell types. HMGB1 is secreted into the extracellular milieu and acts as a proinflammatory cytokine. In this article we reviewed briefly the cellular immune response mediated by HMGB1 in inflammation and sepsis. METHODS: This systemic review is mainly based on our own work and other related reports. RESULTS: HMGB1 can actively affect the immune functions of many types of cells including T lymphocytes, regulatory T cells (Tregs), dendritic cells (DCs), macrophages, and natural killer cells (NK cells). Various cellular responses can be mediated by HMGB1 which binds to cell-surface receptors [e.g., the receptor for advanced glycation end products (RAGE), Toll-like receptor (TLR)2, and TLR4]. Anti-HMGB1 treatment, such as anti-HMGB1 polyclonal or monoclonal antibodies, inhibitors (e.g., ethyl pyruvate) and antagonists (e.g., A box), can protect against sepsis lethality and give a wider window for the treatment opportunity. CONCLUSION: HMGB1 is an attractive target for the development of new therapeutic strategies in the treatment of patients with septic complications.

OBJECTIVETo observe the influence of high mobility group box-1 protein (HMGB1) derived from spleen on the phenotype of regulatory T lymphocytes (Treg) and HMGB1-mediated immune function in severely scalded rats after delayed resuscitation.

METHODSOne hundred and four Wistar rats were divided into normal control group (NC, n = 8), sham scald group (SS, n = 32), scald group (S, n = 32), and ethyl pyruvate (EP) treatment group (EPT, n = 32) according to the random comparison table. Rats in the latter 2 groups were subjected to 30%TBSA full-thickness scald, which were intraperitoneally injected with Ringer solution or EP solution at post scald hour (PSH) 6 (delayed antishock treatment) and administered with 4 mL Ringer solution or EP solution per 12 hours after PSH 12 till PSH 48. Rats in SS group were treated the same as that of S group except for sham scald with 37 degrees C water. Injured rats were sacrificed at post scald day (PSD) 1, 3, 5, 7 (rats in NC group were also sacrificed), and CD4(+)CD25(+)Treg were isolated from spleen with magnetic-activated cell sorting method. The content of HMGB1 in spleen and IL-2 level in supernatant were determined with ELISA. The expression of cytotoxic T lymphocyte-associated antigen 4 (CTLA-4) on Treg was determined with flow cytometry, and the proliferation activity of T lymphocytes was also detected (recorded as absorbance value). Data were processed with analysis of variance among groups and independent samples t test.

RESULTS(1) Compared with that of rats in SS group and EPT group, the expression of splenic HMGB1 in S group increased significantly on PSD 1 through PSD 7 [peaked on PSD 1: (46.7 +/- 8.3) ng/mg protein]. (2) Compared with that in SS group, the expression of CTLA-4 in S group was enhanced significantly on PSD 1 through PSD 5 (with t value respectively 10.459, 12.051, 4.029, P < 0.05 or P < 0.01); while that in EPT group decreased significantly on PSD 1 through PSD 7 as compared with that from S group (with t value respectively 2.796, 9.913, 9.581, 10.022, P < 0.05 or P < 0.01). (3) Compared with that of rats in SS group, the proliferation activity of T lymphocytes in S group was markedly suppressed on PSD 1 through PSD 7 (nadir on PSD1: 0.167 +/- 0.059), and release of IL-2 was decreased significantly [nadir on PSD 5: (44 +/- 24) pg/mL]. T lymphocytes proliferation activity was restored and excretion of IL-2 increased in EPT group as compared respectively with that of S group at each time point.

CONCLUSIONSThe release of HMGB1 may stimulate splenic Treg to mature, thereby induce suppression of proliferation activity of T lymphocytes and immune function. EP can ameliorate immune dysfunction in animals with delayed resuscitation through inhibiting the synthesis and release of HMGB1.

Animals ; Antigens, CD ; metabolism ; Burns ; immunology ; CTLA-4 Antigen ; Cell Proliferation ; HMGB1 Protein ; metabolism ; Interleukin-2 ; metabolism ; Male ; Pyruvates ; pharmacology ; Rats ; Rats, Wistar ; Spleen ; cytology ; immunology ; T-Lymphocytes, Regulatory ; cytology ; immunology

OBJECTIVETo study the effects of Volatile Oil of Radix Angelicae Sinensis (VOA) on experimental asthma in rat model based on abnormal immune functions of Treg cells.

METHODSAfter grouping, the asthmatic rats were developed through injecting OVA and AI(OH)3 for sensitization and then administering OVA aerosol for challenge, and the respiratory functions, asthmatic behaviors, IL-10 levels in bronchoalveolar lavage fluid (BALF) (ELISA) and Foxp3 expression (immunohistochemistry) in lung of asthmatic rats were observed.

RESULTSVOA at the doses of 40-160 mg/kg could improve the respiratory functions and the asthmatic behaviors, and upgrade IL-10 levels in BALF and Foxp3 expression in lung of asthmatic rats.

CONCLUSIONVOA has some effects of anti-asthma and one of the mechanisms is to improving the lower immune functions of Treg cells.

Angelica sinensis ; chemistry ; Animals ; Asthma ; drug therapy ; Bronchoalveolar Lavage Fluid ; chemistry ; Disease Models, Animal ; Forkhead Transcription Factors ; metabolism ; Interleukin-10 ; chemistry ; Lung ; metabolism ; Oils, Volatile ; pharmacology ; Plant Oils ; pharmacology ; Rats ; T-Lymphocytes, Regulatory ; cytology

Objective　To explore the risk factors and causes affecting the operative mortality in esophagectomy patients with esophageal can cer. Methods　1400 cases with a curative esophagectomy for neopl asm of esophagus hospitalized from Mar,1973 to June, 2000 were reviewed. There w ere 31 died within 30 d or during hospitalization after esophagectomy as a group , and 1 369 survival cases, after operation, as another group. Sixteen factors t hat may influence the operational mortality were selected. A multi-variate anal ysis of these individual variables was performed by the computer′s logistic reg ression model. Results　The operative mortality was 2.2%(31/1400 ). The causes of death included respiratory complication 17 cases (including res piratory failure caused by pneumonia or atelectasis), 15 cases, and adult respir atory distress syndrome (ARDS) 2 cases, the mortality was 54.8% in the death gro up), anastomotic leak 11 cases (34.5%), Chylothorax 2 cases (6.5%) and postopera tive digestive tract hemorrhage 1 case (3.2%). The results showed that the major risk factors that affected operative mortality in cases with esophageal cancer were history of long-herm heavy smoking, duration of operation and the year of operational (P<0.05). Conclusion　To minimize operative mort ality of esophagectomy, some means must be noticed, including the reinforcemen t of the perioperative care, the improvement of anastomotic methods and surgical skill, reduing operative time as p ossible, disposing pulmonary complications in time and using respirator if neces sary.

Objective To synthesize and analyze sodium 18F-fluoroacetate (FAC) and its precursor ethyl O-mesylglycolate (EOMG). Methods EOMG was synthesized using modified method. Its chemical purity was checked by HPLC and its structure was elucidated on the basis of spectral analyses. Final product of 18F-FAC was synthesized based on general nucleophilic reactions module Explora GN using EOMG as a precursor. Liquid chromatography Explora LC was applied to get rid of its chemical impurities.Then HPLC and radio-thin layer chromatography were used to assay its radiochemical purity, chemical purity and specific activity. Results EOMG was synthesized and identified. Its yield was 70% and its chemical purity was 97.0% (calculated by chromatographic peak area). The radiochemical purity of 18F-FAC was more than 98%, and its specific activity was 236. 5 MBq/μmol. Conclusion This synthetic method for 18F-FAC and its precursor can be defined as effective and highly quality-controlled.

OBJECTIVETo compare the short-term curative effect of clozapine (CZ) and its combination with electroacupuncture (EA) in treating schizophrenia.

METHODSNinety schizophrenia patients were randomly divided into two groups equally: the EA group treated with combination of CZ (200 - 300 mg/d in mean) and EA, and the CZ group treated with CZ alone. The effects of treatment were evaluated with PANSS, CGI and TESS before and at the 2th, 4th, 6th and 8th weekend of the treatment.

RESULTSThe initiation of effect in the two groups was the same, the total effective rate was 75% in the EA group and 73% in the CZ group. However, somatic complaint was lower and compliance was higher in the EA group than that in the CZ group respectively.

CONCLUSIONWith the effect equal to CZ, combination of CZ and EA shows higher compliance in treating schizophrenia, which would be beneficial in the later stage treatment for consolidation.

Acupuncture Therapy ; Adolescent ; Adult ; Clozapine ; adverse effects ; therapeutic use ; Combined Modality Therapy ; Electroacupuncture ; Female ; Humans ; Male ; Middle Aged ; Schizophrenia ; therapy

Adult ; Charcot-Marie-Tooth Disease ; diagnosis ; diagnostic imaging ; surgery ; Humans ; Male ; Radiography ; Treatment Outcome