Aroma formation and transformation during sealed yellowing process of Pingyang yellow tea.

Yellow tea, a unique type of tea in China which is characterized with yellow color, has gained increasing popularity due to its pleasant taste. However, transformation of aroma compounds during sealed yellowing has been poorly understood. Results of sensory evaluation exhibited that yellowing time was the key factor for flavor and fragrance formation. A total of 52 volatile components during sealed yellowing process of Pingyang yellow soup were further collected and analyzed. The results demonstrated that the sealed yellowing process significantly increased the ratio of alcohol and aldehyde compounds in the aroma volatiles of yellow tea, which were primarily composed of geraniol, linalool, phenylacetaldehyde, linalool oxide and cis-3-hexenol, and their proportion increased with the prolongation of sealed yellowing. Mechanistic speculation revealed that the sealed yellowing process promoted release of alcoholic aroma compounds from their glycoside precursors and enhanced Strecker and oxidative degradation. This study revealed the transformation mechanism of aroma profile during the sealed yellowing process, which would facilitate processing of yellow tea.

Protective effect of serum containing ginseng and Moutan Cortex on HUVEC injured by H_2O_2 / 中国中药杂志

This study aimed to investigate the effect of serum containing ginseng and Moutan Cortex on human umbilical vein endothelial cells(HUVEC) injured with hydrogen peroxide(H_2O_2). HUVEC injured with H_2O_2 were divided into 6 groups, namely blank group, model group, ginsenoside(TGG) group, total glucosides of Moutan Cortex(TGM) group, paeonol(P) group and TGG+TGM+P group. After 24 hours of co-culture with H_2O_2, the activities of succinate dehydrogenase(SDH) and Ca~(2+)-Mg~(2+)-ATP were detected by microenzyme labeling. The apoptosis rate, intracellular Ca~(2+) concentration, reactive oxygen species(ROS) and mitochondrial membrane potential(JC-1) were detected by flow cytometry. The expressions of mitochondrial apoptosis pathway-related proteins Bax, Bcl-2, cytochrome C, caspase-3 and caspase-9 were detected by Western blot. The results showed that H_2O_2 could significantly damage HUVEC, decrease the activity of SDH and Ca~(2+)-Mg~(2+)-ATP(P<0.01), while could increase the apoptosis+necrosis rate, JC-1 decline rate, ROS increase rate and Ca~(2+) concentration increase rate(P<0.01). Serum containing ginseng and Moutan Cortex could increase the activities of SDH and Ca~(2+)-Mg~(2+)-ATP to different degrees, decrease the apoptosis+necrosis rate, JC-1 decline rate, ROS increase rate and Ca~(2+) concentration increase rate(P<0.05 or P<0.01), and down-regulate the protein expressions of Bax, caspase-3, caspase-9, cytochrome C, and up-regulate the protein expression of Bcl-2. The results showed that serum containing ginseng and Moutan Cortex has a protective effect on vascular endothelial cell injury induced by ROS, and its mechanism may be related to the improvement of mitochondrial function and the inhibition of the activation of mitochondrial apoptosis pathway.

Role of BET Bromodomain in Hematopoietic Differentiation from hESCs / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To explore the role of bromodomain and extra terminal (BET) bromodomain in hematopoietic differentiation from human enbryonic stem cells (hESC).</p><p><b>METHODS</b>The effect of BET hematopoietic inhibitor I-BET151 on hematopoietic differentiation from hESC was detected by using a monolayer hematopoietic defferentiation model, immunofluorescence, flow cytometry and real-time PCR; moreover the role of I-BET151 in process of hematopoietic differentiation was explored by adding I-BET151 in different differentiation stages.</p><p><b>RESULTS</b>The analysis results of immunofluorescence, flow cytometry and real-time PCR showed that I-BET 151 significantly inhibited the generation of CD43 positive hematopoietic stem and progenitor cells (HSPCs). It was found that the addition of I-BET 151 in different stages, including APLNR lateral plate mesoderm production, CD34CD31 hemogenic endothelium (HEP) generation and endothelial-to-hematopoietic transition, significantly suppressed the generation of CD43 positive hematopoietic progenitor cells.</p><p><b>CONCLUSION</b>I-BET 151 inhibites hematopoietic differentiation from hESCs at several stages, suggesting that the BET bromodomain plays important roles in multiple stages of hematopoietic differentiation from hESCs.</p>

DMSO Promotes Hematopoietic Differentiation of Human Embryonic Stem Cells in vitro / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To explore the role of dimethyl sulfoxide (DMSO) in the hematopoietic differentiation of human embryonic stem cells (hESCs).</p><p><b>METHODS</b>The role of DMSO in hematopoietic differentiation of hESC was investigated by using a established stepwise hematopoietic differentiation system from hESC, immunofluorescouse assay and flow cytometry. Furthermore, the window phase of DMSO action was explored by adding it to the different stage of hematopoietic differentiation.</p><p><b>RESULTS</b>Immunofluorescence and flow cytometry analysis showed that DMSO significantly promoted the generation of CD43hematopoietic progenitor cells (HPC). The flow cytometry demonstrated that DMSO profoundly promoted the generation of APLNRlateral plate mesoderm cells and CD31CD34hemogenic endothelium progenitors (HEP). The addition of DMSO in the window phase of lateral plate mesoderm cell generation could markedly improve the generation of hematopoietic progenitor cells.</p><p><b>CONCLUSION</b>DMSO promotes hematopoietic differentiation of hESC through enhancing the generation of APLNR positive lateral plate mesoderm cells. The addition of DMSO in the window phase of lateral plate mesoderm cell generation can significantly improve the generation of hematopoietic progenitor cells.</p>

Effects of electroacupuncture on proteasomes of substantia nigra in rats with Parkinson's disease / 中国针灸

<p><b>OBJECTIVE</b>To explore the effects and action mechanism of electroacupuncture (EA) on Parkinson's disease (PD).</p><p><b>METHODS</b>Forty-eight healthy male SD rats were randomly divided into a normal group, a sham operation group, a model group and an EA group, 12 rats in each one. Rats in the model group and EA group were treated with subcutaneous injection of rotenone (1mg/kg, dissolved in dimethyl sulfoxide and 0. 9 % normal saline) on neck and back for 40 days to establish rat model. Rats in the sham operation group were treated with injection of identical dose of dimethyl sulfoxide and 0. 9 %o normal saline at identical location which did not contain rotenone. After model establishment, rats in the EA group were treated with EA at "Fengfu" (GV 16) and "Taichong" (LR 3) with continuous wave (2 Hz, 1 mA), which was given 20 min per time, once a day for consecutive 28 days. Rats in the remaining groups were treated with fixation and immobilization without any other intervention. The rats behavioristics changes were observed and scored; immunohisto-chemistry was adopted to test the expression of tyrosine hydroxylase (TH); fluorescence spectrometry was used to detect the activities of 20 S β1, β2, β5; western blot method was applied to measure the expression of 20S proteasome and its a subunit.</p><p><b>RESULTS</b>Compared with the normal group and sham operation group, there was significant change of behavioristics in the model group, and TH positive neuron counting was obviously reduced; after treatment, the behavioristics score in the EA group was lower than that in the model group (P<0. 05), and TH positive neuron counting was significantly increased (P<0. 05). Compared with the normal group and sham operation group, the activities of 20 S β1, β2, β5 in model group were significantly reduced (all P<0. 01), and those in the EA group were higher than those in the model group (P<0. 01). Compared with the normal group and sham operation group, the expression of 20S proteasome and its a subunit was reduced in the model group, and that in the EA group was higher than that in the model group (P<0. 05).</p><p><b>CONCLUSION</b>EA could improve the loss of dopaminergic neurons induced by rotenone to prevent and treat PD, which is likely to be related with protecting the activity and expression of proteasomes in substantia nigra.</p>

Effects of glucose concentration fluctuation on function of cultured bovine arterial endothelial cells / 中华心血管病杂志

<p><b>OBJECTIVE</b>To explore the effects of glucose concentration fluctuation on function of cultured bovine arterial endothelial cells and underlying mechanism.</p><p><b>METHODS</b>The thoracic aorta of newborn calf was used for primary endothelial cells culture. Cells were divided into 3 groups and cultured for 48 h: control group (C, 5.5 mmol/L), constant high glucose group (HG, 30 mmol/L) and glucose fluctuation (GF, three circles of 2 h 30 mmol/L followed by 3 h 5.5 mmol/L, 30 mmol/L overnight, repeat the whole procedure on the following day) groups. The membranes fluidity of endothelial cells was detected by fluorescence polarization method. The contents of sorbierite, aldose reductase (AR), sorbitol dehydrogenase (SDH) and advanced glycation end products (AGEs) were measured. RAGE, eNOS and ET-1 mRNA expressions were detected by semi-quantitative RT-PCR.</p><p><b>RESULTS</b>The membranes fluidity of endothelial cells in HG or GF group were significantly decreased compared with the control group (all P < 0.01) and significantly lower in GF group than those in HG group (all P < 0.01). Sorbierite, AR and AGEs concentrations were significantly higher in HG and GF groups than those in control group (all P < 0.01) and AR and AGEs concentrations were significantly higher in GF group than that in HG group (all P < 0.01). SDH of endothelial cells in HG or GF group were decreased compared with the control group and lower in GF group than in HG group (all P < 0.05). In addition, the mRNA levels of RAGE, eNOS and ET-1 were significantly upregulated compared with the control group (all P < 0.01).</p><p><b>CONCLUSIONS</b>Glucose concentration fluctuation can result in more severe bovine arterial endothelial cells dysfunction than high glucose via activating polyols metabolic pathways, upregulating the expression of AGEs, eNOS and ET-1. Therefore, glucose concentration fluctuation might play a crucial role on macrovascular complications of diabetes.</p>

Effect on content of serum inflammatory cytokines of patients with ankylosing spondylitis in early stage treated by long snake moxibustion at Governor Vessel and functional exercise / 中国针灸

<p><b>OBJECTIVE</b>To explore the clinical effect and mechanism of long snake moxibustion combined with functional exercise for treatment of ankylosing spondylitis in early stage.</p><p><b>METHODS</b>Seventy-eight cases of ankylosing spondylitis in early stage were randomly divided into an observation group and a control group, 39 cases in each group. The observation group was treated with long snake moxibustion from Dazhui (GV 14) to Yaoshu (GV 2) combined with functional exercise; the control group was treated with oral administration of Sulfasalazine. The effects of the two groups were observed, and contents of erythrocyte sedimentation rate (ESR), tumor necrosis factor alpha (TNF-alpha), intercellular adhesion molecule-1 (ICAM-1) were tested before and after treatment.</p><p><b>RESULTS</b>The total effective rate of 89.7% (35/39) in the observation group, was superior to that of 76.9% (30/39) in the control group (P<0.05). The contents of ESR, TNF-alpha, and ICAM-1 showed downtrend after treatment in the both groups (P<0.05, P<0.01), and the observation group decreased more obviously (all P<0.01).</p><p><b>CONCLUSION</b>Long snake moxibustion at Governor Vessel combined with functional exercise for treatment of ankylosing spondylitis in early stage, can significantly improve clinical symptoms, decrease the level of serum inflammatory cytokines, and the effect is superior to that of Sulfasalazine oral administration.</p>

Risk factors of intrahepatic cholangiocarcinoma: a case-control study / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To explore the potential risk factors of intrahepatic cholangiocarcinoma (ICC) in China.</p><p><b>METHOD</b>A case-control study including 317 patients with pathologically confirmed ICC and 634 healthy individuals was conducted. The cases and controls were matched in age, sex and inhabitancy. Data were statistically analyzed by Chi-square test and conditional logistic regression.</p><p><b>RESULTS</b>Univariate analysis showed significant difference in HBsAg seropositivity, liver cirrhosis, hepatolithiasis, choledocholithiasis and schistosomiasis between ICC patients and healthy controls (P < 0.05). Multivariate analysis confirmed that HBsAg seropositivity, liver cirrhosis, hepatolithiasis and hepatic schistosomiasis were associated with ICC, and their adjusted odds ratio (95% confidence interval) were 10.265 (6.676-15.783), 13.101 (5.265-32.604), 18.242 (3.580-92.958), 18.435 (1.930-176.082), 15.102 (4.607-49.499) and 11.820 (3.522-39.668), respectively. The incidence of hepatic cyst, cholecystolithiasis, hepatic hemangioma, fatty liver, diabetes mellitus, smoking and drinking were not significantly different between ICC patients and controls.</p><p><b>CONCLUSIONS</b>The HBV infection, liver cirrhosis, hepatolithiasis and hepatic schistosomiasis may be the risk factors for ICC in China.</p>

Development and clinical application of male human papillomavirus genotyping by membrane DNA chip / 中华男科学杂志

<p><b>OBJECTIVE</b>To develop a new method for the detection of male human papillomavirus (HPV) genotypes and to investigate its clinical application value.</p><p><b>METHODS</b>With computer assistance and based on the classical common primers MY09/11, modified PGMY09/11 with 23 HPV subtypes for PCR and Genbank data on HPV, we designed probes for the simultaneous detection of 18 high-risk subtypes (HPV-16, 18, 31, 33, 35, 39, 45, 51, 52, 53, 56, 58, 59, 66, 68, 73, 83 and MM4) and 5 low-risk subtypes (HPV-6, 11, 42, 43 and 44) and fixed them to the special membrane to make a DNA chip. A total of 112 male urethral samples were collected with swabs and studied for the clinical value. Meanwhile the single subtypes of HPV positive were sequenced and the standard samples detected for their sensitivity.</p><p><b>RESULTS</b>Of the total number, 25 samples were found to be HPV positive, 13 single HPV infection and 12 multiple infection. Nine HPV gene subtypes were noted in the samples: 6, 11, 16, 18, 33, 35, 43, 56 and 73, with sensitivity up to 10 copies of HPV DNA.</p><p><b>CONCLUSION</b>Human papillomavirus genotyping by the membrane DNA chip is applicable to the diagnosis of male HPV infection as well as to the related epidemic and etiological investigation.</p>

Studies on the properties and co-immobilization of manganese peroxidase / 生物工程学报

White-rot fungus manganese peroxidase (MnP) oxidizes a wide range of substrates, rendering it an interesting enzyme for potential applications. The stability of MnP can be improved by immobilization. With sodium alginate, gelatin, or chitosan as a carrier, and glutaraldehyde as the crosslinking agent, MnP was co-immobilized using the embed-crosslinked method and the adsorb-crosslinked method. The immobilization conditions and the partial properties of the three immobilized enzymes were investigated. When compared with the free enzyme, the optimum pH values and the temperatures of the three immobilized MnPs carried by alginate, gelatin, and chitosan were respectively shifted from 7.0 to 5.0, 5.0, 3.0 and from 35 degrees C to 75 degrees C , 55 degrees , 75 degrees C . The thermostabilities of the three immobilized MnPs were considerably better than that of the native enzyme. The chitosan-decreased by less than 5% even after repeated use for 6 - 9 times. The ability of decolorizing azo dyes in static and shaky situation by gelatin-immobilized MnP approached to the free enzyme, and there was no loss of enzyme activity during 2 repeated batch reactions.

Primary early-stage intestinal and colonic non-Hodgkin's lymphoma: clinical features, management, and outcome of 37 patients.

AIM: To analyze the clinical features, management, and outcome of treatment of patients with primary intestinal and colonic non-Hodgkin's lymphoma (PICL). METHODS: A retrospective study was performed in 37 patients with early-stage PICL who were treated in our hospital from 1958 to 1998. Their clinical features, management, and outcome were assessed. Prognostic factors for survival were analyzed by univariate analysis using the Kaplan-Meier product-limit method and log-rank test. RESULTS: Twenty-five patients presented with Ann Arbor stage I PICL and 12 with Ann Arbor stage II PICL. Thirty-five patients underwent surgery (including 31 with complete resection), 22 received postoperative chemotherapy or radiotherapy or both. Two patients with rectal tumors underwent biopsy and chemotherapy with or without radiotherapy. The 5- and 10-year overall survival (OS) rates were 51.9% and 44.5%. The corresponding disease-free survival (DFS) rates were 42.4% and 37.7%. In univariate analysis, multiple-modality treatment was associated with a better DFS rate compared to single treatment (P = 0.001). While age, tumor size, tumor site, stage, histology, or extent of surgery were not associated with OS and DFS, use of adjuvant chemotherapy significantly improved DFS (P = 0.031) for the 31 patients who underwent complete resection. Additional radiotherapy combined with chemo-therapy led to a longer survival than chemotherapy alone in six patients with gross residual disease after surgery or biopsy. CONCLUSION: Combined surgery and chemotherapy is recommended for treatment of patients with PICL. Additional radiotherapy is needed to improve the outcome of patients who have gross residual disease after surgery.

The role of endogenous opioid peptides in paraventricular nucleus of hypothalamus in the antagonism to myocardial ischemia by electroacupuncture at acupoint "Neiguan" (PC 6) / 中国针灸

<p><b>OBJECTIVE</b>To explore the mechanism of electroacupuncture at "Neiguan" (PC 6) antagonizing myocardial ischemia injury.</p><p><b>METHODS</b>Forty rabbits were randomly divided into 4 groups, model control group, naloxone control group, electroacupuncture plus cerebral spinal fluid group, and electroacupuncture plus naloxone group, 10 rabbits in each group. The effects of electroacupuncture at "Neiguan" (PC 6) after injection of naloxone into the paraventricular nucleus (PVN) of the hypothalamus on myocardial ultrastructure, II lead ECG and transmembrane potentials of the ischemic myocardial cell in the rabbit of myocardial ischemia were investigated.</p><p><b>RESULTS</b>The injection of naloxone into PVN has no effect on myocardial functions in the normal rabbit and a little effect on ischemic myocardial functions, but at 60 min after myocardial ischemia, this has a certain protective action on myocardial functions (P < 0.05); electroacupuncture at "Neiguan" has obvious protective action on ischemic myocardium, which can be reduced by injection of naloxone into PVN (P < 0.05), but can not be blocked.</p><p><b>CONCLUSION</b>(1) PVN plays an important role in the process of antagonizing myocardial ischemia by electroacupuncture at "Neiguan"; (2) endogenous opioid pepetides in PVN are involved in the acupuncture effect of antagonizing myocardial ischemia; (3) other transmitters in PVN and other nucleus groups in the center also can produce obvious effects in the antagonism to myocardial ischemia by electroacupuncture at "Neiguan".</p>

[Clinical features, treatment and prognosis of 136 patients with primary non-Hodgkin's lymphoma of the nasopharynx].

OBJECTIVE: To investigate the clinical characteristics, international prognostic index and treatment of primary non-Hodgkin's lymphoma (NHL) of the nasopharynx. METHODS: From January 1983 to December 1997, 136 patients with previously untreated NHL of the nasopharynx were retrospectively reviewed. All patients were confirmed pathologically and classified by Working Formulation system. There were 18 patients with high-grade, 77 intermediate, 2 low-grade and 39 unclassifiable lymphoma. According to Ann Arbor classification, 25 patients had stage I, 91 stage II, 12 stage III and 8 stage IV lesions. Primary therapy was radiotherapy alone in 13 patients and radiotherapy combined with chemotherapy in 12 patients with stage I disease. In 88 patients with stage II, radiotherapy alone was given to 31 patients, and a combination of radiotherapy and chemotherapy to 57 patients. Chemotherapy was primary treatment for advanced stage III/IV diseases. RESULTS: The overall survival rate (OS), cancer specific survival rate (CSS) and disease-free survival rate (DFS) at 5 and 10 years for all patients were 56.2%, 61.2%, 51.1% and 48.3%, 58.0%, 46.5%, respectively. As for international prognostic index (IPI), the 5-year CSS was 70.9% for 0 risk factor, 44.9% for 1 risk factor, 30.0% for 2 or 3 risk factors, respectively (P = 0.004). For stage I patients, the 5-year CSS was 83.1% for RT alone and 82.2% for combined modality therapy, respectively (P = 0.779). For patients with stage II, the 5-year CSS was 46.0% for radiotherapy alone and 70.9% for combined modality therapy. There was significant difference between them (P = 0.04). Multivariate analysis by Cox regression showed that Ann Arbor stage, B symptom and IPI were independent prognostic factors. CONCLUSION: International prognostic index is an important prognostic factor for Non-Hodgkin's lymphoma of the nasopharynx and the combined modality therapy may be optimal for the stage II patients.

The Application of Furosemide in MRU with Low Field Magnet / 实用放射学杂志

Objective To evaluate the value of furosemide in magnetic resonance urography(MRU) with low field magnet.Methods The routine MRU and MRU after administration of intravein of furosemide were performed with heavily T_2 weighted fast spin echo pulse sequence in 32 cases with urethral diseases.Then three-dimensional(3D) reconstruction for post procedure processing with a maximum-intensity projection(MIP)algorithm was done.Results On routine MRU,there were no image of collecting systems of kidney in 5 cases,and poor images of parenchyma and collecting systems of kidney in 18 cases after using furosemide before MRU,MRU provided high resolution images of parenchyma and collecting systems of kidney in all cases,and images were much clear,the localized diagnosis was accurate.Conclusion MRU using furosemide before scanning can display the parenchyma and collecting systems of kidney distinctively,so furosemide can be regarded as a routine method used before MRU with low field magnet.

X-ray Diagnosis of Osteogenesis Imperfecta:A Report of 10 Cases and Literature Review / 实用放射学杂志

Objective To discuss the X-ray appearances of osteogenesis imperfecta.Methods The clinical and radiological manifestations of osteogenesis imperfecta in 10 child-patients were studied retrospectively.Results ①The change of osseous density:generalized osteoporosis with abnormal fragility of bone;②According to the abnormal contour of limbs bone,the patterns of lesions(10 cases) were categorized to four subtypes including long and thin type(3 cases),stumpy type(3 cases),pocketed and swelled lesions(2 cases) and blended appearances(2 cases);③Among the 10 cases,the lesions complicated by arthropathy were seen in 5 cases;④complicated by abnormal spines in 5 cases,pelvis deformity in 3 cases,chest deformity in 4 cases.Conclusion Radiological manifestations have certain clinical value in the diagnosis and typing of osteogenesis imperfecta.