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OBJECTIVE@#The barks, leaves, and branches of Cinnamomum cassia have been historically used as a traditional Chinese medicine, spice, and food preservative, in which phenylpropanoids are responsible compounds. However phenylpropanoid biosynthesis pathways are not clear in C. cassia. We elucidated the pathways by descriptive analyses of differentially expressed genes related to phenylpropanoid biosynthesis as well as to identify various phenylpropanoid metabolites.@*METHODS@#Chemical analysis, metabolome sequencing, and transcriptome sequencing were performed to investigate the molecular mechanisms underlying the difference of active components content in the barks, branches and leaves of C. cassia.@*RESULTS@#Metabolomic analysis revealed that small amounts of flavonoids, coumarine, and cinnamaldehyde accumulated in both leaves and branches. Transcriptome analysis showed that genes associated with phenylpropanoid and flavonoid biosynthesis were downregulated in the leaves and branches relative to the barks. The observed differences in essential oil content among the three tissues may be attributable to the differential expression of genes involved in the phenylpropanoid and flavonoid metabolic pathways.@*CONCLUSION@#This study identified the key genes in the phenylpropanoid pathway controling the flavonoid, coumarine, and cinnamaldehyde contents in the barks, branches and leaves by comparing the transcriptome and metabolome. These findings may be valuable in assessing phenylpropanoid and flavonoid metabolites and identifying specific candidate genes that are related to the synthesis of phenylpropanoids and flavonoids in C. cassia.
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Objective To investigate the prevalence and related risk factors of anxiety symptoms in elderly patients from one community health service center in Shanghai.Methods Patients aged 60 to 85 years visiting Kongjiang Community Health Service Center from August to December of 2016 were included in the survey.The patients were evaluated with Generalized Anxiety Disorder Scale-7 (GAD-7),Sociodemographic and Health-related Variables Questionnaire,Mental Health Knowledge Scale and Lubben Social Network Scale-6 (LSNS-6).Results Total 2 006 questionnaires were distributed and 1 981 valid questionnaires were returned with a recovery rate of 98.75％.The overall GAD-7 score was 0 (0,2),and 13.5％ (267/1 981) participants had positive anxiety symptoms.Multivariate logistic analysis showed that 6 variables were related to anxiety symptoms,including educational background,exercise frequency,percentage of medical costs over total household expenses,life satisfaction,the amount of chronic somatic disease,mental health knowledge awareness (P ＜ 0.05).Conclusion The prevalence of anxiety symptoms in the study population is relatively high.Anxiety symptoms are associated with multiple factors,to which the attentions should be paid.
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Objective@#To evaluate the reliability and validity of the Chinese version of the Short Form of Quality of Life Enjoyment and Satisfaction Questionnaire (Q-LES-Q-SF) for elderly patients.@*Methods@#The quality of life of 400 elderly outpatients from Kongjiang community health service center were evaluated by using the Chinese version of Q-LES-Q-SF. The reliability of the Chinese version of Q-LES-Q-SF was tested by the internal consistency reliability (Cronbach′s α coefficient) and the half confidence; the validity was tested by structural validity, convergence validity and distinguish validity and calibration validity.@*Results@#The Cronbach′s α coefficient of the internal consistency was 0.956; the Spearman-Brown coefficient of the half confidence was 0.894; the Guttman Split-half coefficient of odd even fold half confidence was 0.894. The exploratory factor analysis showed that there were 2 dimensions: the psychological dimension (Q2-8 items) and the physiological dimension (Q1, Q10-14). The confirmatory factor analysis showed that each psychological dimension factor load of Q2-8 was >0.50; each physiological dimension factor load of Q1, Q10-14 was >0.50. In distinguish validity, there was item with Z> 1.96 (P<0.05), showing that each item had a good distinction between different dimensions. In convergence validity, physiological and psychological dimensions of GFI were all >9.5, RMSEA were all <0.05. In calibration validity, the physiological and psychological dimensions of Q-LES-Q-SF had a good correlation with the corresponding dimensions of the SF-12 (P<0.05), and Pearson correlation value was 0.317 and 0.237, respectively.@*Conclusion@#The Chinese version of Q-LES-Q-SF has a good reliability and validity for elderly patients.
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BACKGROUND:The ankle joint is capable of flexion and extension, including plantar flexion and dorsiflexion, to act as a support and a lever. An ankle injury, often accompanied by fracture and ligament injury, seriously threatens the ankle joint function. Previous diagnosis of ankle injury mainly relied on clinical signs and X-ray examination. However, X-ray examination is not accurate enough for ankle injury diagnosis because it cannot clearly diagnose damage to the surrounding ligaments, tendons and other soft tissues except for obvious fractures. Mutlisequence and multiplanar MRI is currently the optimal noninvasive method for high-resolution determination of soft tissue deformations, but little has been reported on the diagnostic accuracy of ankle ligament and tendon injury. OBJECTIVE:To observe the diagnostic value of MRI for ligament and tendon injury of the ankle in its normal position, and during complete plantar flexion and dorsiflexion. METHODS:It is a single-center, prospective, diagnostic trial that wil be completed at the First Hospital of Hebei Medical University, China. Sixty cases were recruited, including 30 cases of normal ankle joint and 30 cases of ankle ligament and tendon injury. MRI scans of the ankle joint in normal position, complete plantar flexion and complete dorsiflexion were performed in al the cases, and the multi-position MRI results were compared. The primary outcome measure is the sensitivity of MRI to ligament and tendon injury of the ankle during complete plantar flexion. The secondary outcomes include the specificity, positive predictive value, negative predictive value, positive likelihood ratio, and negative likelihood ratio of MRI to ligament and tendon injury of the ankle during the complete plantar position as wel as rate of correct diagnosis;specificity and sensitivity, positive predictive value, negative predictive value, positive likelihood ratio, and negative likelihood ratio in normal position or during the complete dorsiflexion as wel as rate of correct diagnosis;the morphology of the ankle on the multi-position MRI. This study design was registered at ClinicalTrial.gov (03049423) on February 8, 2017. This study protocol has been approved by the Medical Ethics Committee of Qinghai University Affiliated Hospital of China (approval No. 2015076) and wil be performed in accordance with the guidelines of the Declaration of Helsinki, formulated by the World Medical Association. Signed informed consent regarding trial procedure and treatment was obtained from each volunteer. DISCUSSION:This study aims to determine the rate of correct diagnosis of ankle ligament and tendon injury using the MRI, to clarify the diagnostic value of MRI for ankle ligament and tendon injury, and to provide a quantitative MRI diagnostic standard for developing a reasonable surgical treatment.
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Objective To study the changes of gonadotropin releasing hormone agonist (GnRH-a) in pinopodes during luteal phase and to explore the possible mechanism of GnRH-a in luteal phase support of assisted reproductive technology (ART).Methods Totally 40 primary infertility women who were treated with ART due to male factors were enrolled,according to the order of the group they were randomly divided into experimental group and control group.On the 7th day after ovulation,the experimental group received a subcutaneous injection of 0.1 mg of GnRH-a,while the control group received a subcutaneous injection of placebo only (0.9％ salinc 2 ml),3 days later they came to the clinic again.Serum estradiol and progesterone levels were measured before and after treatment in each group.Pinopodes were collected for electron microscopic examination.Levels of ER and PR were detected by western blot.Results (1) There was no significant difference between the experimental group and the control group in the estrogen level before and after the treatment (all P＞0.05).The level of progesterone in the experimental group after treatment [(66.8± 14.9) nmol/L] was significantly higher than that before treatment(P＜0.05);also significantly higher than the same period of the control group (P＜0.05).(2) There was no significant difference in the expression of ER protein in the experimental group before and after treatment (P＞0.05).The expression of PR in the experimental group after treatment was significantly lower than that before treatment (P＜0.05);also lower than the same period of the control group (P＜0.05).(3) Expression amount of pinopodes in the experimental group after treatment was significantly higher than that before treatment [65％ (13/20) versus 25％ (5/20),P＜ 0.05],and the development trend was more mature [the percentage of maturation:75％ (15/20) versus 35％ (7/ 20),P＜0.05].Expression amount of pinopodes after treatment and the percentage of maturation in the experimental group were significantly higher than those in the same period of control group (P＜0.05).Conclusion GnRH-a in luteal phase support may play a role through the corpus luteum,which may promote the secretion of progesterone,downregulation of PR expression,promote the growth of pinopodes,and improve the endometrial receptivity.
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BACKGROUND:Animal death is a main influential factor for experimental results in establishment of animal models of steroid-induced necrosis of femoral head. OBJECTIVE:To observe models of femoral head necrosis established using lipopolysaccharide and dexamethasone so as to elevate success rate of model induction. METHODS:A total of 48 New Zealand white rabbits were equal y and randomly divided into model group, gentamicin group, gentamicin+lansoprazole group and control group. The first three groups were injected with lipopolysaccharide for 2 consecutive days via the ear vein, and then they were injected with dexamethasone via intramuscular injection in the buttocks for 3 consecutive days to establish models of femoral head necrosis. The rabbits of gentamicin group, gentamicin+lansoprazole group were intragastrical y administered gentamicin for 7 consecutive days after success model induction. Simultaneously, gentamicin+lansoprazole group received intramuscular injection with lansoprazole. Rabbits in the control group were only injected with saline. RESULTS AND CONCLUSION:Models were successful y established in the model, gentamicin, gentamicin+lansoprazole groups. Their conditions were best in the gentamicin+lansoprazole group. Mortalities in above-mentioned groups were 33.3%, 25%and 8.3%, respectively. Significant differences in the number of dead rabbits were detected in the model, gentamicin, gentamicin+lansoprazole and control groups (P<0.05). Results indicated that the combined use of gentamicin and lansoprazole can elevate survival rate of experimental animals during the establishment of rabbit models of steroid-induced necrosis of femoral head.
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BACKGROUND:To construct a normal animal model of femoral head necrosis contributes to the research of the pathogenesis of femoral head necrosis, which can provide theoretical basis for the prevention and treatment of femoral head necrosis. OBJECTIVE:To research the experimental effect of lipopolysaccharide combined with dexamethasone injection in the induction of rabbit femoral head necrosis. METHODS:Thirty-six New Zealand white rabbits were randomly divided into model group (n=21) and control group (n=15). The rabbits in the model group were injected with 10μg/kg lipopolysaccharide daily and continuous for 2 days, and then injected with 25 mg/kg dexamethasone daily for 3 days continuously. The rabbits in the control group were injected with the normal saline at the same volume. RESULTS AND CONCLUSION:After 4 weeks, the X-ray film of the rabbit in the model group showed the joint gaps were widened, the density was increased, the articular subchondral bone mineral density was increased, the femoral head was flat, trabecular bone was fuzzy, the boundaries between subchondral bone and cancel ous bone was unclear, and the patchy high-density areas were observed in the femoral head with shortened femoral neck. The bone mineral density of partial femoral head was measured with dual-energy X-ray absorptiometry, and found that the bone mineral density of femoral head and the bone mineral content of the model group were significantly lower than those of the control group (P<0.05). Histological section observation showed that the bone cel lacuna was empty and shal ow, fat cel s were increased and vascular thrombosis was observed, meanwhile, the osteonecrosis rate and lacunae rate of the survival animals were significantly higher than those in the control group. Dexamethasone combined with lipopolysaccharide can effectively construct the model of steroid-induced avascular necrosis of the femoral head.
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BACKGROUND: Previous studies has explored the effects of nerve growth factor (NGF) on cultured rabbit Schwann cells as well as preparation of acellular nerve allografts, in addition, the neural complex was prepared in vitro.OBJECTIVE: To investigate the effect of acellular nerve allografts on the functional recovery and reconstruction of the nerve-muscle structure of the sciatic nerve defect in rabbits.DESIGN, TIME AND SETTING: The randomized controlled animal experiment was performed at the Center Laboratory of Third Hospital of Hebei Medical University from March 2006 to June 2007.MATERIALS: Totally 37 healthy, adult, New Zealand, white rabbits were selected. One rabbit was prepared for extracted nerve bridge, and the others were randomly divided into the experimental and control groups, with 18 animals in each group.METHODS: The double sides of sciatic nerve were removed, divested surrounding tissues, and cut into 3 cm segments, then placed in TdtonX-100 solution for 12 hours, washing with distilled water. The procedure was repeated, and TritonX-100 totally used for 96 hours. Then the extracted nerve bridge was conserved in Hank's solution at temperature of 4 ℃. The concentration of 2~(nd) passage Schwann cell was regulated to 1 ×10~(11)/L, and injected to extracted nerve bridge, followed by DMEM culture, to obtain neural complex. Rabbits in the experimental group were prepared a 20 m defects above knee joints, and the recellularized neural complex were transplanted into the defective sciatic nerve. Rabbits in the control group were prepared by transplanting extracted nerve bridge without Schwann cells.MAIN OUTCOME MEASURES: The elcosis and healing of feet were observed at weeks 4, 8, and 16 after operation, meantime,the recovery of axon of distal end peroneal nerves, myelin sheath, tibialis anterior, as well as motor end plate were detected by electromyogram, light microscope and transmission electron microscope.RESULTS: At weeks 4, 8 and 16 after operation, the rejection was not found in the operating field. The experimental group was better than the control group in healing of ulcers, the number of nerve fibres, the ultramicrostructure of medullary sheaths, the regeneration nerve, the structure of the motor end plate and muscle. At 4 weeks after operation, no nerve conduction was found in 2 groups, but at weeks 8 and 16 after operation, the experimental group was better than the control group in wet weight of tibialis anterior muscle and nerve conduction velocity (P < 0.05).CONCLUSION: The recellularized neural complex can significantly promote the reconstruction of the nerve-muscle structure and functional recovery of injured sciatic nerve.
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In this paper,we summarize the teaching ideas,methods,and means for the course "Theory and Experiment of Molecular Biology" in which we teach students in an architecture-network-application way,exploring the education reform for the basic medical science.
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This paper presents how to practically cultivate students' creative ability,scientific thinking and exploration ability in the molecular biology experiment course.
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AIM: To study on antisense oligoncleotides as inhibitor of human acute promyelocytic leukemia (HL-60) proliferation and C-myc protein expression. METHODS: Oligonucleotides with different lengths (18-21 mer) complementary to the definite regions of C-myc mRNA, modified groups (with S replaced O in internucleotide phosphate linkage) and unmodified ones (with natural internucleotide phosphate linkage) were designed and synthesized. These olignucleotides were tested for their activity on HL-60 cell and also for their toxicity on normal lymphatic cells of human. RESULTS: It was found that two of the oligonucleotides complementary to 5′-44-61 and 5′-556-576 the regions of C-myc mRNA exhibited great inhibitory effects (59.5 % and 62.7 %) on growth of HL-60 cells for a definite time. And no toxicity of the two antisense oligonucleotides was found on normal lymphatic cells of human. CONCLUSION: The sequence of antisense oligonucleotides complementary to 5′-44-61 of C-myc mRNA was designed newly by us may be turned into inhibitory medicine of HL-60 cells.
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Objective To report the first case of cutaneous type adult T-cell leukemia/lymphoma(cATLL) in China. Methods The skin lesion was examined by histopathology and direct immunofluorescence (DIF), and the immunophenotype was also studied. ELISA and Western blot were used to test the serum antibodies to HTLV-Ⅰ, and HTLV-Ⅰproviral DNA of lymphoid cells was detected by PCR. Results The patient had polymorphic skin lesions including papules, plaques, and bullae with tense or flaccid walls. Histopathogical examination showed subepidermal bullae, and there were small-to-medium-sized atypical lymphoid cell infiltrations in the dermal papilla in the bottom, and border of the bulla. CD45+ and CD45RO+ staining, and negative DIF were observed in the atypical lymphoid cells. The serum antibodies to HTLV-Ⅰ, and proviral DNA of HTLV-Ⅰin the blood lymphoid cells were detected. The patient died with a disease course of one year and ten months. Conclusion ATLL is not extremely rare in China, and cATLL may also exist.
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Objective To report a case of lymphomatoid papulosis(LyP)followed by mycosis fun-goides(MF)during his27years course and determine whether these diseases are clonally related.Methods Characteristics of clinicopathology and immunophenotype of skin tissues of different phases of the patients were compared.Simultaneously,clonal T-cell receptor gene rearrangement of skin lesion tissues and blood specimens were detected by means of polymerase chain reaction and Southern blot analysis.Results A dis-tinct clinical and pathological feature was shown in this case of LyP followed by MF.The proliferating lym-phocytes in LyP and MF were mature T helper lymphocytes,and with same T-cell clone.Conclusion LyP followed by MF displays a same T-cell clone.The clonal T-cell is irrelevant to the biological behavior of these diseases.