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The development of speech is a process by which the neural network structure of brain perceives, decodes, represents, and outputs input signals. At the cortical level, the classic model of speech processing proposed two pathways leading from the auditory system: the ventral stream and the dorsal stream.The ventral stream, which involved structures in the superior and middle portions of the temporal lobe, was involved in processing speech signals for perception and comprehension (speech recognition). The dorsal stream, which involved structures in the posterior frontal lobe and the posterior dorsal-most aspect of the temporal lobe and parietal operculum, had an auditory-motor integration function and was essential for speech production. However, the importance of auditory processing in central auditory nervous system(CANS) from the vestibulocochlear nerve to the auditory cortex for speech development had not been clarified.This review aims to discuss the roles and related mechanisms of the CANS in speech recognition and generation from the perspective of cognitive neuroscience, so as to provide new ideas for clinical monitoring and long-term prediction of auditory processing and speech development, and for diagnosis and treatment of clinical speech-related diseases.
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Alzheimer's disease (AD) is a neurodegenerative disease of the central nervous system that starts slowly and progressively leads to cognitive impairment.Clusterin,as an apolipoprotein,is usually widely expressed in mammalian brain tissue.In previous studies,below theories have been demonstrated:clusterin influences the aggregation,clearance and neurotoxicity of β-amyloid;compared to healthy people,AD patients show higher clusterin level in plasma and cerebrospinal fluid;the polymorphisms of clusterin gene encoding clusterin can enhance the incidence risk of AD.In addition,regulating the expression of clusterin in AD animals model has certain therapeutic effect on AD.Further investigating intrinsic relationship between clusterin and AD will help clarify the pathogenesis and establish a new therapeutic target of AD thus contributing to the prevention of Alzheimer's disease.
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Objective To investigate the effect of Nourishing Yin and Nonifying Yang sequential therapy (NYNYST )com-bined with western medicine on expression levels of Smad2 ,Smad3 ,Smad7 mRNA in rats with diminished ovarian reserve (DOR).Methods Totally 40 female rats were randomly divided into 5 groups ,the normal control group ,the model group ,the western medicine group ,the NYNYST group and the combination group(western medicine combined with NYNYST ) ,8 in each group. The DOR model was established through orally administering tripterygium pill for continuous 2 weeks. The normal con-trol group and the model group were administered with saline for 10 days. The western medicine group was treated with hor-mone replacement therapy(HRT ) and ovarian stimulation. The NYNYST group was administered with Nourishing Yin herbs in proestrus and Nonifying Yang herbs in late estrus and the combination group was administered with combination of Chinese herb and western drugs for 10 days ,with the same dose in the former two groups.Serum levels of FSH ,LH ,E2 ,anti-Müllerian hormone(AMH) ,Transforming growth factor beta 1(TGF-β1)and Inhibin B(INHB)were measured by ELISA.Changes of Smad2 ,Smad3 ,Smad7 mRNA in ovaries were detected by real-time PCR.Results Compared with the model group ,the serum levels of FSH ,LH were decreased significantly in western medicine group ,NYNYST group and combination group(P＜0.01) , the serum levels of E2 ,AMH ,TGF-β1 and INHB increased in the rats of the treatment group(P＜0.05 ,P＜0.01) ,and efficacy of the combination group was significantly superior to that of the western medicine group (P＜0.01 ,P＜0.05);compared with the model group ,Smad2 mRNA increased significantly in NYNYST group and combination group ,Smad3 mRNA increased sig- nificantly in combination group(P＜0.01) ,the efficacy of combination group was superior to that of the western medicine group (P＜0.05);compared with the model group ,Smad7 mRNA of treatment groups was decreased significantly (P＜0.01).Conclu-sion NYTYST combined with western medicine can improve the function of ovaries by up-regulating the expression of Smad2 , Smad3 mRNA and down-regulating the expression of Smad7 mRNA in DOR rats.
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To explore the influence for combination of nourishing yin and tonifying yang sequential therapy (NYTYST) with Western medicine in treating anovulatory infertility rats with diminished ovarian reserve (DOR) based on TGF-β1/Smads signaling pathway. Methods: A total of 40 female rats were randomly divided into 5 groups, a normal control group, a model group, a Western medicine group, a NYTYST group and a combination group (n=8 in each group). The DOR model was established through orally taking tripterygium pill for continuous 2 weeks. The normal control group and the model group were treated with saline for 10 days. The Western medicine group was treated with hormone replacement therapy (HRT) and ovarian stimulation. The NYTYST group was treated with nourishing yin herbs in proestrus and tonifying yang herbs in late estrus and the combination group was treated with Chinese herb and Western drugs for 10 days. HE staining was used to observe histopathologic changes in ovary. Expression levels of transforming growth factor β1 receptor (TGF-β1R) in rats ovarian were detected by immunohistochemistry. Expression levels of Smad2, Smad3 and Smad7 protein in rat ovarian were detected by Western blot. Results: Compared with the control group, the numbers of developing follicles, mature follicles and corpus luteum were decreased , while atrefic follicles were increased significantly in the model group (P<0.01); the levels of TGF-β1R, Smad2 and Smad3 were decreased significantly, while Smad7 was increased significantly (P<0.01). Compared with the model group, the numbers of developing follicles, mature follicles and corpus luteum, Smad2 and Smad3 expression were increased, while atrefic follicles and Smad7 were decreased significantly in the treatment group (P<0.05 or P<0.01). The numbers of developing follicles and corpus luteum in the combination group was superior to the Western medicine group (P<0.05). Compared with the Western medicine group, the levels of TGF-β1R, Smad2 and Smad3 were increased significantly, while Smad7 was decreased significantly in the combination group (P<0.05 or P<0.01). Conclusion: NYTYST combined with Western medicine can improve the function of ovaries reserve by up-regulation of TGF-β1R, Smad2 and Smad3 while down-regulation of Smad7 in DOR rats.
Subject(s)
Animals , Female , Rats , Drugs, Chinese Herbal , Therapeutic Uses , Gene Expression Regulation , Infertility , Therapeutics , Medicine, Chinese Traditional , Ovarian Reserve , Signal Transduction , Smad2 Protein , Genetics , Metabolism , Smad3 Protein , Genetics , Metabolism , Transforming Growth Factor beta1 , Genetics , MetabolismABSTRACT
Aquaporin 4 (AQP4) is the most abundant aquaporin type in the brain.It is mainly expressed in the perivascular end feet of astrocytes.A large number of studies have shown that AQP4 is involved in the formation and elimination of brain edema in intracerebral hemorrhage,and plays important roles in the maintenance of the integrity of blood-brain barrier,secondary neuroinflammation,and apoptosis after intracerebral hemorrhage.More and more studies focus on the roles and mechanisms of AQP4 in intracerebral hemorrhage,however,the results are not completely consistent.This article reviews the roles and mechanisms of AQP4 in intracerebral hemorrhage
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Cerebral smal vessel disease (CSVD) can be divided into sporadic and hereditary CSVD. The exact pathogenesis of sporadic CSVD is unknow n. Genetic factors may also play an important role, except for environmental and vascular risk factors. As a complicated disease, sporadic CSVD has the characteristics of multigenetic susceptibility. Therefore, investigating the related genetic factors may contribute to understanding the pathogenesis of sporadic CSVD. This article review s the advances in research on the genetics of sporadic CSVD.
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To observe the clinical therapeutic effect of the subluxation of the small joints of the cervical vertebrae by acupuncture plus Tuina, 178 subjects were divided randomly into acupuncture group, Tuina group and acupuncture plus Tuina group to receive the corresponding treatment. The cure rate in acupuncture plus Tuina was 68.8%, which is higher than that in acupuncture group (27.8%) and that in Tuina group(28.6%), and the statistical management showed significant differences. Acupuncture combined with Tuina could enhance the therapeutic effect in the treatment of the subluxation of the small joints of the cervical vertebrae.
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Objective To establish and stabilize a new HLA-B locus typing strategy, reference strand mediated conformation analysis(RSCA)system and to conform its advantages.Methods Of 27 hematopoitic stem cell transplant patients and 63 potential donors DNA samples were extracted from peripheral blood cells and HLA-B loci were both typed by RSCA and PCR-SSP methods. The (ambi)-(guous) results were identified by using DNA sequencing. Results Among 90 samples, 87/90 ((96.7) %) cases could be designated definitely, but one of them was disagreement with the SSP result which was confirmed by sequencing, and 67/90 ((74.4) %) cases could be typed to allelic level. 1/90 ((1.1) %) case could not be identified by RSCA for its bad PCR results. Only one allele of each 2 samples could be designated and the other could not be identified by RSCA, which were further confirmed by sequencing method, and the results confessed which were known as alleles, but there were no corresponding data in RSCA database. Twenty samples were randomly selected to identify the replication rate of RSCA, and the results demonstrated that the replication rate was 100 %. Among PCR-SSP typing results, about 10 % samples might be typed for 1-3 times to confirm their types. Conclusion RSCA had some advantages such as high resolution, high sensitivity, high accuracy, high replication, finding new alleles, large scale and low cost, and was especially suitable for unrelated donor-recipient (screening).
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Objective To clone CD34 extracellular region encoding cDNA and to construct its eukaryon expression vector to explore the feasibility of its monoclonal antibody preparation by gene immunization. Methods Total RNA was extracted from KG-1a cell lines. CD34 extracellular region encoding genes were amplified by RT-PCR method and then confirmed by enzymatic lysis and DNA sequencing, and its eukaryon expression vector was constructed as pcDNA3.1-CD34. Twelve BABL/c mice aged 4-6 weeks were selected and randomly divided into 3 groups. Before immunization, 50?l 25% saccharin solution was injected into mouse musculus quadriceps femoris. Fifteen minutes later, blank control PBS, PBS diluted empty vector pcDNA3.1(50?g), or PBS diluted pcDNA3.1-CD34 was injected into the same site of the above three groups, respectively. Immunization was taken every two weeks for a total of three times. The antibody was detected regularly by FACS using tail blood from immunized mice. Results The results demonstrated that the length of CD34 cDNA was 886bp which was identical to the theoretical value and its sequence was confirmed by DNA sequencing which was identical to the registered sequence. The accuracy of CD34 expression vector recombination was confirmed by restriction enzymatic lysis. Hind III and EcoRI restriction enzymatic lysis sites were introduced into 5 and 3 terminals of amplified cDNA sequence, respectively. Terminate code TGA was also introduced into CD34 extracellular encoding cDNA. The expression vector possessing target genes was named as pcDNA3.1-CD34. FACS detection indicated that only 1/4(25%) immunized mice had a lower titer CD34 antibody in their tail vein serum 2-6 weeks after immunization, and the others did not show no antibody production. Conclusion The eukaryon expression vector pcDNA3.1-CD34, which express CD34 extracellular region, has been constructed. The feasibility of CD34 McAb preparation can primarily be confirmed by gene immunization.
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AIM: To obtain the high expression of recombinant human stem cell factor - thrombopoitin (SCF-TPO) fusion gene and predict its structure property. METHODS: Tour primers were designed according to known sequence of TPO and SCF to amplify the functional amino acid domain of TPO and SCF by RT- PCR, respectively from fetus hepatocytes. The expression plasmid pET32a/SCF- TPO was constructed by VOE gene fusion technique and expressed in BL21(DE3)plysS. The fusion protein property, such as second structure, flexibility, and hydrophilicity were predicted by DS Gene and Protscale software. RESULTS: The expression vector, pET32a/SCF - TPO was constructed and the high expression of the SCF/TPO fusion protein was obtained, with the expression amount of up to 40% of the total cellular protein. DS Genel .5 and Protscale predict no new antigenicity in fusion protein, and the second structure and ioelectric point have no changes except four amino acids change in first structure. There are high flexibility and low hydrophilieity in the linker peptide. CONCLUSION: High expression of SCF- TPO fusion protein has been obtained and protein prediction shows that the fusion protein design is reasonable, which lay foundation for further study of biological fundation of SCF - TPO fusion protein.
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The MHC molecules were first discovered as major histocompatibility antigens. When their essential biological function as antigen-binding molecules and informers for T cells was unveiled, an explanation of why MHC also acts as major histocompatibility antigens was provided. When the antigen-binding cleft of MHC molecules was firstly clarified more than 10 years ago, the study of MHC structure and function has stepped into a prosperous new era, and many achievements have in this area have been achieved. This paper summarized the exciting progress in study on MHC structure and function in recent years.
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Objective:Identification of some biochemical and physical properties for a new recombinant B7-2-PE40KDEL exotoxin fusion protein.Methods:12%SDS-PAGE separating and gel imaging analyzing,peptide mass fingerprinting,Western blot and MTT assasying were used respectively for identification of the protein.Results:Molecular weight of the recombinant B7-2-PE40KDEL was 72 628,5% of the difference to its theoretical value 69 561.The result of Western blot indicated that the purified recombinant B7-2-PE40KDEL could specifically bind with mAb anti-human B7-2 and the antibody against PEA,while the negative control did not.The recombinant B7-2-PE40KDEL digested with trypsin and then detected by MOLTI-TOF-MS.It was shown that the detected 15 peptides lied in the extracellular part of B7-2 and the truncated Pseudomonas extoxin PE40KDEL.Searching in the peptident data bank of Expasy website,we did not find any known proteins which was accordant with the above terms.The cytotoxic activity of the recombinant toxin with MTT method showed that the B7-2-PE40KDEL selectively killed Jurkat cell line which expressesed CD28 receptor well and had no killing effect on the Raji cell line unexpressing CD28 receptor.Conclusion:Recombinant B7-2-PE40KDEL exotoxin fusion protein we construct proves to be a new one with targeted killing bioactivity to B7:CD28 system.