Aminoacyl-tRNA synthetases (AARSs) catalyze aminoacylation of their tRNAs for protein biosynthesis. As belong to one of the most ancient and conserved enzyme family their additional functions in mammalian cells were focused recently. Mutations in tyrosyl-tRNA synthetase, glycyl-tRNA synthetase and alanyl-tRNA synthetase from patients and mice models were identified to cause two subtypes of Charcot-Marie-Tooth disease and cerebellar Purkinje cell loss, respectively. These mutations affect different functions of the three enzymes including aminoacylation, editing and unknown functions. These results combined AARSs with neurodegeneration and gave new sights into neuropathy.

Breast tumor is the most common malignant tumor in female,its incidence is increasing in recent years.With magnetic resonance equipment,image acquisition and processing technology is improved,perfusion imaging studies gradually become the focus of study.The author reviewed MRI perfusion imaging and its application in breast tumors.

[Objective] The better optimization of traditional Chinese medicine for the treatment of respiratory syncytial virus, in the past five years is re-viewed in this paper, also the related domestic experimental research results, and according to the pathogenesis of RSV, it further summarizes the current domestic research for the main direction of the disease. [Methods] The article from the two aspects of compound Chinese medicine and traditional Chinese medicine monomer, according to the pathogenesis of respiratory syncytial virus section, discusses the experiment in vivo and in vitro related rich research results. [Results] It is found by inducing and summarizing, whether individual or compound traditional Chinese medicine, for respiratory syncytial virus re-search has made great achievement, but with experimental study limited to suppress the virus more value-added; replication and inhibiting inflammatory infiltrates the two big aspects, lacking of deeper side of molecular biology research, making the traditional Chinese medicine in the treatment of respiratory syncytial virus research appear too single, not a broader recognition by the industry. [Conclusion] We need to be sure the safety of traditional Chinese medicine for the treatment of respiratory syncytial virus and curative effect, but at the same time must recognize that because of the complexity of its com-position and design of experiment of traditional Chinese medicine, the irrationality of the existence of many factors, it makes progress with many problems, so we must be aware of their own insufficiency, more in-depth explore its mechanism of action, with al kinds of research direction in the future for us.

Purpose To investigate the CT features of different pneumocystis pneumonia (PCP) types in AIDS as well as the relationship between different PCP types and CD4+ T lymphocyte count,in order to deepen the understanding and improve the diagnosis and treatment of PCP.Materials and Methods The CT examination data of 102 AIDS patients with PCP were retrospectively analyzed,the CT findings were divided into 6 types,and CD4+ T lymphocyte count of the 6 PCP types was statistically analyzed.Results ① The CT findings of PCP were divided into the following 6 types:transparent ground-glass type (42 cases,41.2％),muddy ground-glass type (17 cases,16.7％),solid variant (11 cases,10.8％),cystic variant (6 cases,5.9％),interstitial type (19 cases,18.6％),and mixed type (7 cases,6.9％).② The CD4+ T lymphocyte count of different PCP types was analyzed,and the difference was statistically significant (F=2.672,P＜0.05).Further pairwise comparison showed that the CD4+T lymphocyte count of transparent ground-glass type was higher than that of solid variant and cystic variant (P＜0.05),and there was no significant difference between the other groups (P＞0.05).Conclusion CT findings of AIDS with PCP have certain characteristics,and it is helpful to deepen the understanding of PCP through imaging classification.There is a certain correlation between different PCP types and CD4+T lymphocyte count,and it is helpful to improve the diagnosis and treatment of PCP by analyzing the correlation.

Objective To analyze retrospectively the result of nonspecific mastitis diagnosed by mammography and color Doppler's ultrasonic, and to improve the diagnosis accuracy of nonspecific mastitis as well as the ability to identify with breast cancer.Methods 31 cases of nonspecific mastitiswere examined by mammography and color Doppler's ultrasonic.All cases were punctured by biopsy or surgery, and confirmed by pathology.Results The coincidence rates between mammography and color Doppler's ultrasonic with pathology were 64.5% and 67.7% respectively.The coincidence rate between the combined mammography and color Doppler's ultrasonic with pathology were 87.1%.There was no statistically significant difference between the two separate inspection methods (P>0.05).Conclusion Mammography and color Doppler's ultrasonic have their own advantages in the diagnosis of nonspecific mastitis, and are easy to be confused with breast cancer.Combining mammography with ultrasonography can improve the accuracy of unspecific mastitis diagnosis and the ability to identify breast cancer.

Objective To evaluate the method of plasmodium DNA template extraction from dried blood on filter paper . Methods Collectedand tested 47 blood samples of suspected imported malaria patients ,the DNA was extracted and tested by using conventional procedures and PCR ,then count and analyze test results of matched design .Results The Kappa value was 0 .492 when compared filter paper dried blood spots with thick and thin blood smear test results ,and the Kappa value was 0 .686 when com‐pared with whole blood sample .Using the results of thick and thin blood smear and whole blood samples as the gold standard to e‐valuate the sensitivity and specificity of filter paper dried blood spot method respectively ,the sensitivity was 75 .0% ,71 .4% and specificity was 78 .9% ,100 .0% .Conclusion Collected blood samples using filter paper can′t get good results in PCR test ,still needs further research .

Ample evidences have showed that the failure of early regeneration of the central nervous system(CNS) in adult mammals is mainly due to the growth inhibitory factor.Efforts have been made to promote neuron regeneration and neurological function recovery by damaging myelin and removing myelin-associated inhibitors.At present,the Nogo protein associated drugs and gene therapy have become a novel effective way to promote axon regeneration after CNS injury;here we reviews the recent progress on the related issues.

Proteasome pathway is another major pathway of protein degradation in addition to lysosome in eukaryotic cell ,which involved a number of physiological functions regulation in cell .Prokaryotic ubiquitin-like protein was found in My-cobacterium tuberculosis in 2008 .With the effect of co-factor Dop ,PafA and Mpa ,Pup can mark a variety of protein ubiquitina-tion followed by importing them into proteasomal degradation .The target protein of Pup-proteasome system like FabD ,PanB , Ino1 ,Icl ,SodA ,and MtrA are involved with metabolism ,signal transduction pathways ,virulence factors ,pathogenicity and the persistence of bacteria in the host cell .Proteasome inhibitor make the function of proteasome restricted and the accumula-tion of Pup’s labeled substrate result in changes in the expression of gene indirectly ,which impacted the ability of resistance to outside pressure and the pathogenicity of Mycobacterium tuberculosis . The finding Pup-proteasome system reveals a novel mechanism of protein degradation in prokaryotes ,which is expected to become a new target of treatment of anti-TB drugs . Here ,we summarize the progress on the Pup-proteasome system in Mycobacterium tuberculosis .

Objective To observe the effects and mechanism of ischemic postconditioning(IPo) on alleviating injuries of small intestine and remote organs induced by intestinal ischemia-reperfusion (IR).Methods A total of 48 rabbits were divided randomly into three groups(n =16 in each):the Sham group,the IR group and the IPo group.After 2 hours of reperfusion,arterial and venous blood and tissues of intestine,liver and lung were harvested.The levels of TNF-α,IL-1β,IL-6 and IL-10 in arterial blood and levels of ALT,AST,BUN,Cr,LDH,CK-MB activity and endotoxin in venous blood were tested.MDA, CAT,SOD and MPO levels in serum,small intestine,liver and lung were also measured.HE staining was performed for observation of injured intestinal mucosa.Bacterial translocation rate was calculated after bac-teria culture.Results Compared with the IR group,MDA and MPO levels in serum,small intestine,liver and lung decreased in the IPo group,while CAT and SOD levels increased obviously.Compared with the IR group,ALT,AST,LDH,CK-MB and BUN levels in the venous blood,and TNF-α,IL-1β,IL-6 and endotox-in levels in arterial blood were all decreased.IL-10 increased and the intestinal mucosal injury score de-creased obviously.Conclusion Ischemic post conditioning can decrease the damage of intestinal mucosa, reduce endotoxin translocation,promote activation of anti-inflammatory cytokines,inhibit excessive release of inflammatory mediators,enhance the antioxidant capacity of intestine and remote organs,reduce injuries to the small intestine and remote organs.

Objective: Pemetrexed (PEM) is a multi-targeted chemotherapeutic agent for antifolate drugs. PEM has become the standard agent for the second-line treatment of advanced non-small cell lung cancer (NSCLC). This study aims to review and analyze the clinical efficacy and adverse reactions of PEM combined with carboplatin with respect to NSCLC treatment. Methods: A total of 40 patients suffering from NSCLC were selected and confirmed by pathology. On the first day of treatment, the conventional 500 mg/m2 dose of pemetrexed disodium was infused intravenously. On the second day, a combined therapy with carboplatin was conducted based on the conventional dose for a 21-day cycle with at least two cycles for each patient. The therapeutic efficacy and adverse reactions were evaluated and were compared with the proposed regimen of gemcitabine (GEM) combined with carboplatin. Results: After two cycles of the treatment, the curative effects of the PEM and GEM groups were 50% and 45%, respectively. The main adverse reactions are bone marrow suppression and gastrointestinal reactions. The incidence rates of bone marrow suppression, gastrointestinal reactions, amisulpride/AST, urea nitrogen, rash, and hair loss were obviously lower in the PEM group than in the GEM group. Statistically significant differences in adverse reaction were found between the two groups (P<0.05). Conclusion: The use of the combination regimen of PEM with carboplatin showed significantly more clinical effects and less adverse reactions for NSCLC treatment.