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A total of 937 prion protein gene (PRNP) sequences belonging to 83 species in 56 genera of 26 families were analyzed in order to investigate its evolution and differentiation among species. The length of PRNP coding sequence for all species analyzed varied from 567 to 825 bp, which was mainly because of insertion or deletion in the repeat region within and among the species. TGA and TAG are the main stop codons in the PRNP gene. Bos taurus had the smallest variation in terms of average number of nucleotide differences (0.811), nucleotide diversity (0.0011), and nonsynonymous nucleotide diversity (0.0002) among all the ruminants. The reconstructed phylogenetic tree of PRNP of families and species was basically consistent with the taxonomy of National Center for Biotechnology Information except for Felidae (Felis catus), which was initially clustered with Moschidae rather than Mustelidae or Canidae.
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Evolução Molecular , Príons/genética , Animais , Códon de Terminação , Biologia Computacional , Variação Genética , Humanos , Filogenia , Especificidade da EspécieRESUMO
Objective:To evaluate the role of nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3) in sepsis-associated encephalopathy (SAE) and the relationship with pyroptosis in microglia of mice.Methods:Twenty-four SPF healthy male C57BL/6J mice, aged 6-8 weeks, weighing 18-22 g, were divided into 3 groups ( n=6 each) using a random number table method: sham operation group (Sham group), SAE group and SAE plus an NLRP3 inhibitor MCC950 group (SAE+ MCC950 group). The mouse model of SAE was prepared by cecal ligation and puncture after anesthesia. MCC950 20 mg/kg was intraperitoneally injected at 1 h after developing the model in SAE+ MCC950 group, and the equal volume of normal saline was given instead in the other groups. Open field tests were conducted at 1 day after developing the model to record the number of rearing and time spent in the central area. Novel object recognition tests were conducted at 2-3 days after developing the model to record the recognition index. After the behavioral experiment on 3 day after developing the model, mice were sacrificed and hippocampal tissues were collected for determination of the expression of NLRP3 (by Western blot), count of cells co-expressing NLRP3 and microglia-specific ionized calcium-binding adaptor molecule 1 (Iba-1) (by immunofluorescence), activity of caspase-1, and contents of interleukin-1beta(IL-1β) and IL-18 (by enzyme-linked immunosorbent assay). Results:Compared with Sham group, the number of rearing was significantly reduced, the time spent in the central area was shortened, the recognition index was decreased, the expression of NLRP3 was up-regulated, the count of NLRP3 + -Iba-1 + cells was increased, and the activity of caspase-1 and contents of IL-1β and IL-18 were increased in SAE and SAE+ MCC950 groups ( P<0.05). Compared with SAE group, the number of rearing was significantly increased, the time spent in the central area was prolonged, the recognition index was increased, the expression of NLRP3 was down-regulated, the count of NLRP3 + -Iba-1 + cells was decreased, and the activity of caspase-1 and contents of IL-1β and IL-18 were decreased in SAE+ MCC950 group ( P<0.05). Conclusions:NLRP3 is involved in the development of SAE, which may be related to the mediation in microglial pyroptosis in mice.
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Objective:To study the current status of research in the field of iodine nutrition for pregnant women and to detect the hot spots and future trends in the field of iodine nutrition for pregnant women.Methods:Using "pregnant women" and "iodine" as search terms, we searched the literature related to iodine nutrition in pregnant women from January 2000 to December 2021 in China Knowledge Network (CNKI) database, Wanfang database and Chinese Medical Journal Full Text Database. CiteSpace 6.2.2.0 software was used to sort out the publication status, core authors and research hotspots of the papers.Results:A total of 879 valid papers were included, with an overall number of publications increasing trend from 2000 - 2021 and a decline after 2017. Among the 879 papers, 29 first authors were core authors (M≈3), and 109 papers were published, accounting for 12.40% of the total literature; several research groups with relatively stable collaborative relationships had been formed, with the larger collaborative team of Chen Zupei and Zhang Wanqi at Tianjin Medical University. Keyword co-occurrence analysis showed that pregnant women, urinary iodine, and iodine nutrition were high-frequency keywords; keywords with mediated centrality > 0.07 were pregnant women (0.48), pregnancy (0.40), urinary iodine (0.37), iodine deficiency disorders (0.25), iodine nutrition (0.20), thyroid (0.12), thyroxine (0.10), infants and children (0.09). The analysis of the emergent words showed that the evolution of iodine nutrition research themes in pregnant women was broadly based on studies of iodine nutrition monitoring results in key populations such as newborns and infants from 2000 - 2011, studies such as the range of thyroxine reference values during pregnancy from 2012 - 2016, and changes in iodine nutrition status of pregnant women and children after adjustment of iodized salt concentration from 2017 - 2021. The clustering results showed that a total of 355 keywords were aggregated to yield 10 clusters, and the average profile value of clusters (Silhouette) > 0.8, which was a reasonable clustering result; the study topics can be divided into three major categories, iodine nutrition and goiter monitoring results in key populations, thyroid hormones and pregnancy outcomes during pregnancy, and studies on thyroid-related diseases.Conclusions:Iodine plays an important role in the health of pregnant women and their offspring, and changes in the iodine nutrition status of pregnant women should be closely monitored. In response to the new trends of change that are currently present, multidisciplinary cooperation should be developed to respond to social concerns and jointly promote the maintenance of iodine nutrition in pregnant women at appropriate levels.
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Objective:To evaluate the effects and adverse reactions of external skin care products containing oltides and bio-polysaccharides on epidermaligopep barrier function of sensitive skin.Methods:From December 2019 to July 2020, there were 30 sensitive skin volunteers diagnosed and treated in the dermatology clinic of Beijing Tongren Hospital, including 3 males and 27 females, aged 18-57 years, with an average of 34 years, and the course of disease was 1-10 years, with an average of 5.75 years. They were treated once with products containing oligopeptides and biopolysaccharides on the day of enrollment. Before treatment, 1 week and 4 weeks after treatment, we observed and evaluated through VISIA analysis; skin physiological index measurement, subjective and objective improvement assessment, and product safety were evaluated through questionnaire surveys.Results:The VISIA data showed that the red zone was significantly lower than the baseline, and the data at the 4th week and before treatment were significantly improved ( P<0.05). On skin physiology, the test showed that after treatment, the difference between two follow-up visits and the water content before was statistically significant ( P<0.05). TEWL value after 4 weeks of treatment was significantly improved as compared with the baseline ( P<0.05). During the entire study process, no adverse reactions related to the product occurred. Conclusions:This skin care product containing oligopeptides and biopolysaccharides can increase the water content of the sensitive skin, reduce the water loss through the skin, and improve the skin barrier function. Meanwhile, no server adverse reaction is detected through the whole experiment.
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Objective:To evaluate the effect of electroacupuncture (EA) on Golgi apparatus stress in the rats with endotoxin-induced acute lung injury (ALI).Methods:Twenty clean-grade male Sprague-Dawley rats, aged 2 months, weighing 160-185 g, were divided into 4 groups ( n=5 each) according to a random number table method: control group (C group), endotoxin group (LPS group), EA plus endotoxin group (EA+ LPS group), and sham EA plus endotoxin group (SEA+ LPS group).The model of endotoxin-induced ALI was developed by intravenous injection of lipopolysaccharide (LPS) 5 mg/kg in anesthetized animals.Bilateral Zusanli (ST36) and Neiguan (PC6) acupoints were stimulated with an electric stimulator for 30 min once a day at 1-4 days before and during model preparation in group EA+ LPS.In group SEA+ LPS, acupuncture needles were inserted to the surface of ST36 and PC6 acupoints with no current stimulation, and the other parameters were the same as those previously described in group EA+ LPS.Blood samples were collected from the abdominal aorta at 6 h after development of the model for measurement of concentrations of tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) in serum by enzyme-linked immunosorbent assay.The animals were sacrificed and lungs were removed for microscopic examination of the pathological changes of lung tissues (with a light microscope) and morphological changes of Golgi apparatus (with a transmission electron microscope) and for determination of wet to dry lung weight (W/D) ratio, cell apoptosis index (by TUNEL), activity of superoxide dismutase (SOD) (by WST-1 method), content of malondialdehyde (MDA) (by TBA method), and expression of Golgi matrix protein 130 (GM130), Golgin-84 and Golgi phosphoprotein 3 (GOLPH3) protein and mRNA in lung tissues (by Western blot or real-time polymerase chain reaction). Results:Compared with group C, the lung injury score, W/D ratio, cell apoptosis index, serum IL-6 and TNF-α concentrations and MDA content were significantly increased, SOD activity was decreased, the expression of GM130 and Golgin-84 protein and mRNA was down-regulated, the expression of GOLPH3 protein and mRNA was up-regulated ( P<0.05), and Golgi apparatus was swollen and vacuolated in the other three groups.Compared with group LPS, lung injury score, W/D ratio, cell apoptosis index, serum IL-6 and TNF-α concentrations and MDA content were significantly decreased, SOD activity was increased, the expression of GM130 and Golgin-84 protein and mRNA was up-regulated, the expression of GOLPH3 protein and mRNA was down-regulated ( P<0.05), and swelling and vacuolization of Golgi apparatus were reduced in group EA+ LPS, and no significant change was found in the parameters mentioned above in group SEA+ LPS ( P>0.05). Conclusions:The mechanism by which EA reduces endotoxin-induced ALI may be related to inhibition of Golgi apparatus stress in lung tissues of rats.
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Objective:To evaluate the relationship between changes in Golgi apparatus morphological structure and endotoxin-induced acute lung injury (ALI) in mice.Methods:Twenty healthy male C57BL/6J mice, weighing 18-20 g, aged 6-8 weeks, were divided into 2 groups ( n=10 each) using a random number table method: sham operation group (group Sham) and endotoxin-induced ALI group (group ALI). Lipopolysaccharide (LPS) 10 mg/kg was injected intravenously in group ALI, while the equal volume of normal saline 0.5 ml was given instead in group Sham.The animals were sacrificed at 12 h after LPS injection and the lung tissues were taken for detection of the content of reactive oxygen species (ROS) and wet to dry weight ratio (W/D ratio), for observation of the pathological changes (using HE staining) and Golgi apparatus morphological structure (with a transmission electron microscope) and for determination of expression of Golgi matrix protein 130 (GM130), Golgin97 and mannosidase alpha class II member 1 (MAN2A1) and its mRNA (by Western blot and quantitative polymerase chain reaction). Results:Compared with group Sham, ROS content and the W/D ratio in lung tissues were significantly increased, GM130, MAN2A1, Golgin97 protein and its mRNA expression were down-regulate ( P<0.01), the pathological changes of lung tissues were accentuated, the Golgi cisternae was swollen, and Golgi fragments were dispersed in the cytoplasm in group ALI. Conclusion:The mechanism of endotoxin-induced ALI may be related to the changes in Golgi apparatus morphological structure.
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Objective:To evaluate the role of nicotinamide adenine dinucleotide (NAD + )-mediated deacetylation activity of silent information regulator 1 (SIRT1) in endotoxin-induced acute lung injury (ALI) in mice. Methods:Twenty-five SPF clean-grade healthy male C57BL/6 mice including 10 wild-type (WT) and 15 NMNAT1 conditional-knockout (KO) mice, aged 6-8 weeks, weighing 20-25 g, were selected.The WT mice were divided into 2 groups ( n=5 each) using a random number table method: control group (group WT+ C) and ALI group (group WT+ ALI). The KO mice were divided into 3 groups ( n=5 each) using a random number table method: control group (group KO+ C), ALI group (group KO+ ALI) and ALI plus NAD + precursor substances nicotinamide mononucleotide (NMN) group (KO+ LPS+ NMN group). ALI was produced with lipopolysaccharide (LPS) 15 mg/kg injected intravenously.NMN 500 mg/kg was intraperitoneally injected at 1 h before injection of LPS in KO+ ALI+ NMN group, while the equal volume of normal saline was given instead in control group.Blood samples were collected from the abdominal aorta at 12 h after LPS or normal saline injection for blood gas analysis, and the animals were then sacrificed and the lung tissues were removed for microscopic examination of pathologic changes which were scored and for determination of wet/dry weight ratio (W/D ratio), and interleukin-6 (IL-6), IL-1β and tumor necrosis factor-alpha (TNF-α) contents (by enzyme-linked immunosorbent assay)and content of NAD + (using a spectrophotometer) and levels of SIRT1, acetylated nuclear factor kappaB (Ac-NF-κB), acetylated p53 (Ac-p53), acetylated FoxO1 (Ac-FoxO1) and acetylated PGC1α (Ac-PGC1α) (by Western blot). Results:Compared with group C, pH value and PaO 2 were significantly decreased, the PaCO 2, W/D ratio, lung injury score, contents of IL-6, IL-1β, TNF-α and NAD + were increased, expression of SIRT1 was up-regulated, and expression of Ac-NF-κB, Ac-p53, Ac-FoxO1 and Ac-PGC1α was down-regulated in group ALI ( P<0.05). Compared with group WT+ ALI, pH value and PaO 2 were significantly decreased, the PaCO 2, W/D ratio, lung injury score, contents of IL-6, IL-1β and TNF-α were increased, NAD + content was decreased, expression of SIRT1 was down-regulated, and expression of Ac-NF-κB, Ac-p53, Ac-FoxO1 and Ac-PGC1α was up-regulated in group KO+ ALI ( P<0.05). Compared with group KO+ ALI, pH value and PaO 2 were significantly increased, the PaCO 2, W/D ratio, lung injury score, contents of IL-6, IL-1β and TNF-α were decreased, NAD + content was increased, expression of SIRT1 was up-regulated, and expression of Ac-NF-κB, Ac-p53, Ac-FoxO1 and Ac-PGC1α was down-regulated in group KO+ ALI+ NMN ( P<0.05). Conclusion:The enhanced NAD + -mediated deacetylation activity of SIRT1 is involved in the endogenous protective mechanism in mice with endotoxin-induced ALI.
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Objective:To explore the relationship between carcinoembryonic antigen (CEA) and metabolic syndrome (MetS) in females.Methods:The study involved 11337 women who visited the health check-up system in Health Management Center of a general hospital in Shandong province between January 2014 and December 2015. By grouping CEA by quartiles, logistic regression models were used to analyze the relationship between CEA and MetS and its components.Results:The prevalence of MetS was 16.4 %, and abnormal levels of CEA accounted for 7.1% of patients with MetS which exceeded the general physical examination population (3.2%). The level of CEA increased with the increase of the number of metabolic components. The multivariate logistic regression analysis showed that people with high levels of carcinoembryonic antigen were at higher risk for metabolic syndrome( χ2=18.374, P<0.01). Compared with the level of CEA in Q1, CEA levels in Q2, Q3, and Q4 were statistically related to MetS. The OR values were 1.25(95% CI 1.03-1.52), 1.25(95% CI 1.03-1.51) and 1.42(95% CI 1.17-1.72), respectively. Conclusion:For females, the study suggests that there is a relationship between CEA and MetS. The increased CEA level in patients with MetS should be carefully explained in clinical practice.
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Objective To understand the changing trend of dementia disease burden attributed to high BMI in China from 1990-2019, and to provide a basis for the development of dementia prevention and control strategies. Methods Using data from the Global Burden of Disease Study 2019(GBD2019),the changes in disease burden were analyzed using indicators such as deaths, disability adjusted life years (DALYs), years lived with disability (YLDs), years of life lost (YLLs) and their standardized rates. The differences between sexes and age groups were compared. Joinpoint regression model was used to analyze the trend of changes in the disease burden of dementia attributable to high BMI in China. Results From 1990 to 2019, the burden of dementia disease attributed to high BMI continued to increase, with 20,300 more deaths, 404,200 more DALYs, and more than a four-fold increase in both mortality and DALYs rates. The overall burden of disease was greater for women than for men, but the rate of increase in the burden of disease was higher for men than for women. The disease burden in the age group of 80 and over was significantly higher than in other age groups. Conclusion Attention should be paid to people with high BMI, especially for the prevention and control of dementia risk in older age groups with high BMI. Active countermeasures should be taken to control the occurrence of dementia.
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Objective To evaluate the role of heme oxygenase-1 (HO-1) on lipopolysaccharide (LPS)-induced activation of NOD-like receptor pyrin domain-containing 3 (NLRP3) inflammasomes in alveolar macrophages of rats.Methods NR8383 cells of rat alveolar macrophages cultured in vitro were seeded in 96-well plates at a density of 4× 104 cells/ml and divided into 4 groups (n =48 each) using a random number table method:control group (group C),group LPS (group L),LPS+HO-1 siRNA group (group L+HO-1 siRNA),and LPS+Con siRNA group (group L+Con siRNA).The cells were cultured in normal culture atmosphere in group C.NR8383 cells were stimulated with 10 μg/ml LPS in L,L+HO-1 siRNA and L+Con siRNA groups.Cells were transfected with HO-1 siRNA at 48 h before stimulation with LPS in group L+HO-1 siRNA and with Con siRNA at 48 h before stimulation with LPS in group L+Con siRNA.The ceils were collected and incubated for 24 h after stimulation with LPS for measurement of the cell viability,expression of HO-1 and NLRP3 mRNA (by real-time polymerase chain reaction),expression of HO-1,NLRP3,apoptosis-associated speck-like protein containing a caspase recruitment domain (ASC)and caspase-1 (by Western blot),and concentrations of interleukin-1beta (IL-1β) and interleukin-18 (IL-18) in the supernatant (by enzyme-linked immunosorbent assay).Results Compared with group C,the cell viability was significantly decreased,the expression of HO-1 and NLRP3 protein and mRNA,ASC and caspase-1 was up-regulated,and the IL-1β and IL-18 concentrations were increased in L,L+HO-1 siRNA and L+Con siRNA groups (P<0.05).Compared with group L,the cell viability was significantly decreased,the expression of HO-1 protein and mRNA was down-regulated,and the expression of NLRP3 protein and mRNA,ASC and caspase-1 was up-regulated,and the IL-1β and IL-18 concentrations were increased in group L+HO-1 siRNA (P<0.05),and no significant change was found in the parameters mentioned above in group L+Con siRNA (P>0.05).Conclusion HO-1 is involved in LPS-induced activation of NLRP3 inflammasomes in alveolar macrophages of rats.
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Objective@#To evaluate the role of heme oxygenase-1 (HO-1) on lipopolysaccharide (LPS)-induced activation of NOD-like receptor pyrin domain-containing 3 (NLRP3) inflammasomes in alveolar macrophages of rats.@*Methods@#NR8383 cells of rat alveolar macrophages cultured in vitro were seeded in 96-well plates at a density of 4×104 cells/ml and divided into 4 groups (n=48 each) using a random number table method: control group (group C), group LPS (group L), LPS+ HO-1 siRNA group (group L+ HO-1 siRNA), and LPS+ Con siRNA group (group L+ Con siRNA). The cells were cultured in normal culture atmosphere in group C. NR8383 cells were stimulated with 10 μg/ml LPS in L, L+ HO-1 siRNA and L+ Con siRNA groups.Cells were transfected with HO-1 siRNA at 48 h before stimulation with LPS in group L+ HO-1 siRNA and with Con siRNA at 48 h before stimulation with LPS in group L+ Con siRNA.The cells were collected and incubated for 24 h after stimulation with LPS for measurement of the cell viability, expression of HO-1 and NLRP3 mRNA (by real-time polymerase chain reaction), expression of HO-1, NLRP3, apoptosis-associated speck-like protein containing a caspase recruitment domain (ASC) and caspase-1 (by Western blot), and concentrations of interleukin-1beta (IL-1β) and interleukin-18 (IL-18) in the supernatant (by enzyme-linked immunosorbent assay).@*Results@#Compared with group C, the cell viability was significantly decreased, the expression of HO-1 and NLRP3 protein and mRNA, ASC and caspase-1 was up-regulated, and the IL-1β and IL-18 concentrations were increased in L, L+ HO-1 siRNA and L+ Con siRNA groups (P<0.05). Compared with group L, the cell viability was significantly decreased, the expression of HO-1 protein and mRNA was down-regulated, and the expression of NLRP3 protein and mRNA, ASC and caspase-1 was up-regulated, and the IL-1β and IL-18 concentrations were increased in group L+ HO-1 siRNA (P<0.05), and no significant change was found in the parameters mentioned above in group L+ Con siRNA (P>0.05).@*Conclusion@#HO-1 is involved in LPS-induced activation of NLRP3 inflammasomes in alveolar macrophages of rats.
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Objective To investigate the effect of ultrasound debridement combined with vacuum sealing drainage on the treatment of diabetic foot ulcer and the potential mechanism. Methods Eighty-one patients with diabetic ulcer were randomly divided into two groups:ultrasound debridement combined with vacuum sealing drain-age as the experimental group,routine debridement combined with vacuum sealing drainage as the control group. The clinical curative effect,the reduction rate of the wound,the rate of blastocyst and the rate of bacterial clear-ance and blood flow were detected.Results The clinical curative effect in the experimental group was significantly better than that in the control group(P < 0.05). The rates of wound reduction and granulation were significantly higher than those in the control group(P<0.05).After 14-day treatment,the blood perfusion in the experimental group was significantly higher than that in the control group(P<0.05),and the expression of HIF-1α and VEGF in the ulcer tissue was significantly higher than that in the control group(P<0.05).Conclusions Ultrasound de-bridement combined with vacuum sealing drainage can improve the clinical efficacy,wound reduction rate,granu-lation coverage rate and bacterial clearance rate,and increase ulcer tissue blood flow. The potential mechanism is related with the increases of HIF-1α and VEGF in ulcer tissue.
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Objective To evaluate the role of protein kinase Cα (PKCα)/heme oxygenase-1 (HO-1) signaling pathway in endotoxin-induced damage to alveolar macrophages and the relationship with mitofusin-1 (Mfn1) in rats.Methods Rat alveolar macrophages NR8383 cells cultured in vitro were seeded in 96-well plates at a density of 1 × 104 cells/ml.NR8383 cells were divided into 5 groups (n =15 each)using a random number table:control group (group C),endotoxin challenge model group (group E),PKCα inhibitor Go6976 group (group G),PKCα agonist PMA group (group P) and dimethyl sulfoxide group (group D).NR8383 cells were stimulated with 10 μg/ml lipopolysaccharide (LPS) to establish the model of endotoxin challenge in alveolar macrophages.In G,P and D groups,cells were pretreated with 5 μmol/L Go6976,100 nmol/L PMA and 0.1% dimethyl sulfoxide,respectively,for 30 min starting from 30 min before stimulation with LPS,and 10 μg/ml LPS was then given.The cells were collected after 24 h of incubation for measurement of malondialdehyde (MDA) and reactive oxygen species (ROS) contents,superoxide dismutase (SOD) activity and expression of PKCα,HO-1 and Mfn1 protein and mRNA (by fluorescent quantitative polymerase chain reaction or Western blot).Results Compared with group C,MDA and ROS contents were significantly increased,the SOD activity was decreased,the expression of PKCα and HO-1 protein and mRNA was up-regulated,and the expression of Mfn1 protein and mRNA was downregulated in E,G,P and D groups (P<0.05).Compared with group E,MDA and ROS contents were significantly increased,the SOD activity was decreased,and the expression of PKCα,HO-1 and Mfn1 protein and mRNA was down-regulated in group G,MDA and ROS contents were significantly decreased,the SOD activity was increased,and the expression of PKCα,HO-1 and Mfn1 protein and mRNA was upregulated in group P (P<0.05),and no significant change was found in the parameters mentioned above in group D (P>0.05).Conclusion Promotion of Mfn1 expression following PKCα/HO-1 signaling pathway activation is the endogenous protective mechanism of endotoxin-induced damage to alveolar macrophages of rats.
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The dynamism and health of the mitochondrial network are regulated by fission and fusion proteins , which help to maintain organelle vitality and the physiological state of the cell .Recently, accumulated evidence has demon-strated that the changes of mitochondrial dynamics have a great effect on inflammation in a variety of diseases .To the con-trary , inflammatory mediators regulate mitochondrial dynamics at the same time .The aim of this reviews is to summarize the relationship between them and to provide new clinical reference for preventing and curing diseases .
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Although efficient nonsurgical transfer of embryos in mice would provide many advantages over a surgical method, the low success rate of nonsurgical transfer has hampered its acceptance and use. Here, a plastic catheter was used to mimic embryo transfer process and then the transfer efficiency was evaluated by intrauterine trypan blue dye dispersion. Also 3.5-day blastocysts from natural pregnant mice were transferred through cervix into uterine horns. The results show that 70.9% of CD-1 mouse 3.5-day blastocysts transferred into unilateral uterine horns of pseudopregnant 2.5-day recipients can be developed to live newborns, and an efficient mouse nonsurgical embryo transfer technique was established. The technique was simple, rapid, inexpensive, unlikely to get contaminated, ethical and do not need specialized apparatus, and can completely replace surgical embryo transfer techniques. Moreover, the mouse nonsurgical embryo transfer technique provides a research model for human and other large animal embryo transfer.
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Animais , Feminino , Camundongos , Gravidez , Blastocisto , Transferência Embrionária , MétodosRESUMO
<p><b>OBJECTIVE</b>To establish the transformation system of mulberry, and test its ability of quercetin biosynthesis.</p><p><b>METHOD</b>Hairy roots of mulberry were obtained through infecting etiolated seedlings with Agrobacterium tumefaciens strain C58C1. The culture condition of hairy roots was optimized. The transformation of T-DNA was examined by PCR assay and quercetin content was determined by HPLC.</p><p><b>RESULT</b>When infecting stem cutting of etiolated seedlings via C58C1 strain, the optimal transformation conditions were as follows: 10 minutes' infection, two-days pre-culture and co-culture, additional hydroxylacetosyringone (As) 100 mg x L(-1). The PCR examination result showed that rolB and rolC genes could be inserted into the hairy roots of mulberry. Hairy roots appeared in 10 days after infecting, the frequency of stems explants was up to 92% after 30 days culturing. After 50 days culturing in 1/2MS + 0.05 mg x L(-1) IBA liquid medium, the content of quercetin increased by 8. 5-fold.</p><p><b>CONCLUSION</b>Hairy root culture system of Moraceae plants was established successfully for the first time. In addition, it also provides a foundation for further industrial production of active compounds such as quercetin.</p>
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Agrobacterium tumefaciens , Genética , Metabolismo , Células Cultivadas , DNA Bacteriano , Genética , Marcação de Genes , Métodos , Vetores Genéticos , Genética , Metabolismo , Morus , Genética , Metabolismo , Microbiologia , Quercetina , Transformação GenéticaRESUMO
Objective To study the migration capability of mouse preimplantation embryos in uteri.Methods Total(1?045) embryos from CD-1 mouse including fertilized oocytes,2-cell embryos,morula,blastocysts,tetraploid embryos and parthenogenetic embryos were transferred unilaterally(right uterus or oviduct) into pseudopregnant CD-1 recipient females. Results Forty-five pregnant recipients were obtained.Among 45 recipients,implanted embryos,the scope from 5 to 20,were found at right uterine horn in each pregnant recipient,but only 6 implanted embryos in left uterine horn of 6 pregnant recipients.Conclusion Mouse preimplantion embryos barely migrate and move in between two uterine horns,embryos transferred unilaterally also can not implante equaly in left and right uterine horns.
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Objective:Comprehensive evaluation on the puerperal women's health status,and probing those influencing factors on their quality of life. Methods:513 puerperal women received the survey on health status including physical, psychological and social function dimensions by relevant items of Quality of Life designed by WHO and related factors were analyzed by stepwise regression.Results:The QOL of puerperal women were lower than general women aged between 18-49 years old in three dimensions(91.44?4.05/97.84?3.66,u=25.95,82.42?7.02/89.81?8.50,u=17.53,88.87?4.99/98.12?4.59,u=29.47,均P
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Objective: To explore the related factors of quality of life(QOL) among rural elderly population in Shandong Province and explore the relationship among these factors.Methods: In this cross-sectional study,a sample of 451 elderly peple(aged from 60 to 92,without hearing or mental problems) was selected by a stratified cluster random sampling method.The 36-item Short Form Health Survey(SF-36) was used to measure QOL,and the AMOS 5.0 was used to carry out path analysis.Results: The QOL average score of all subjects was(78.5?15.4);QOL scores of males was higher than that of females [(81.2?13.0) vs.(77.5?16.3),P=0.003].There was a significant decrease of the QOL score with increasing age [60-69 years,(82.2?13.3);70-79 years,(77.0?16.0);≥ 80 years,(71.4?16.4);P
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@#Objective To evaluate the efficacy of comprehensive rehabilitation on cervical syndrome(CS).Methods 112 patients with CS were randomly divided into two groups.The cases in comprehensive rehabilitation group(n=56) were treated with traction,ultrashort wave and massage,while those in the control group(n=56) were treated with traction only.Results The efficient rate of comprehensive group were 91.1% 3 weeks after treatment,and the symptom scores improved significantly compared with the control group(P<0.01).Conclusion The comprehensive rehabilitation is efficient on cervical syndrome with few side-effects and complication.