长足大竹象信息素结合蛋白CbuqPBP2互作蛋白的筛选与验证

【目的】筛选长足大竹象(Cyrtotrachelus buqueti)信息素结合蛋白CbuqPBP2的互作蛋白,为实现利用信息物质对长足大竹象种群持续控制提供参考。【方法】利用GST pull-down联合质谱技术,对长足大竹象信息素结合蛋白CbuqPBP2的互作蛋白进行筛选、鉴定和分析,并采用酵母双杂交试验验证了CbuqPBP2与信息素结合蛋白CbuqPBP1的特异性互作。【结果】GST pull-down共筛选出45个与长足大竹象信息素结合蛋白CbuqPBP2特异性结合的候选互作蛋白,包括CbuqPBP1、ND2、CYTB。这些互作蛋白主要参与细胞过程、定位、代谢过程、应激反应以及生物调控等多个生物学过程。使用酵母双杂交体系,构建了pGADT7-PBP1重组猎物质粒与pGBKT7-PBP2重组诱饵质粒,通过诱饵质粒毒性检测和自激活检测,表明重组诱饵质粒对Y2HGold酵母菌无毒性作用。共转化验证结果显示,诱饵质粒pGBKT7-PBP2共转化酵母菌株能够在TDO培养基上生长。【结论】CbuqPBP2和CbuqPBP1之间有相互作用,不同信息素结合蛋白间的互作对深入理解长足大竹象嗅觉感受机制提供了新的思路。

妊娠晚期感染B族链球菌孕妇早产的危险因素及其pbp2x基因突变分析

目的 分析某院感染B族链球菌(GBS)孕妇发生早产的危险因素及观察早产孕妇感染GBS的pbp2x基因突变情况。方法 选取2022年1月至2023年5月在该院分娩且感染GBS的孕妇199例,根据早产与否分为观察组(41例)和对照组(158例)。采用二分类logistic回归模型和受试者操作特征(ROC)曲线分析感染GBS的孕妇发生早产的危险因素;对早产孕妇的GBS样本进行pbp2x基因一代测序分析。结果 199例感染GBS孕妇中发生早产41例,发生率为20.6%。Logistic回归分析显示,年龄[比值比(OR)=1.151,P=0.004)]和口服葡萄糖耐量试验(OGTT)异常项数(OR=2.995,P<0.001)是感染GBS孕妇发生早产的独立危险因素。两危险因素联合预测早产的曲线下面积(AUC)为0.783,最佳敏感度为75.6%,特异度为69.0%,较单项危险因素预测价值高。pbp2x基因测序发现3个错义突变(1129G>A、1148T>G、1528A>G),未发现影响GBS对青霉素敏感性的基因突变。结论 年龄和OGTT异常项数是感染GBS孕妇发生早产的危险因素,两者联合预测的效能优于单项,早产孕妇感染的GBS中尚未发现影响青霉素敏感性的pbp2x基因突变。

异源表达盐单胞属(Halomonas)周质磷酸盐结合蛋白基因PBP降低转基因烟草砷积累研究

为探讨PBP基因在异源烟草中的生物学功能,筛选出低砷(As)积累亲本烟草种质。以转PBP基因烟草T2代种子和野生型烟草(Nicotiana tabacum K326)种子为材料,利用Real-time PCR分析外源PBP的时空表达模式,测定As胁迫下转基因烟株抗氧化酶(AOEs)活性变化及分析转基因烟草株系中As积累差异。AOEs活性测定表明,As胁迫第5天时CK植株中SOD和POD酶活性达到极值,分别为80.25 U/g和152.02 U/g,显著高于转基因植株;在胁迫后期(3~5 d)CK植株中H2O2和MDA含量也显著高于转基因植株。另外,在第7天和14天时转基因植株中As含量比CK植株均显著降低。离子转运蛋白基因表达分析表明,As胁迫不仅诱导转基因植株PBP基因表达显著上调,而且也引起转基因和CK植株中HAK1和PHT4等通道蛋白基因的显著上调,且CK植株中HAK1和PHT4的平均表达水平为转基因植株的1.5倍和3.75倍。外源PBP基因导入可有效降低转基因烟草对As的积累。

Genetic pathways in cerebral palsy:a review of the implications for precision diagnosis and understanding disease mechanisms

Ce rebral palsy is a diagnostic term utilized to describe a group of permanent disorders affecting movement and posture.Patients with cerebral palsy are often only capable of limited activity,resulting from non-progressive disturbances in the fetal or neonatal brain.These disturbances severely impact the child’s daily life and impose a substantial economic burden on the family.Although cerebral palsy encompasses various brain injuries leading to similar clinical outcomes,the unde rstanding of its etiological pathways remains incomplete owing to its complexity and heterogeneity.This review aims to summarize the current knowledge on the genetic factors influencing cerebral palsy development.It is now widely acknowledged that genetic mutations and alterations play a pivotal role in cerebral palsy development,which can be further influenced by environmental fa ctors.Des pite continuous research endeavors,the underlying fa ctors contributing to cerebral palsy remain are still elusive.However,significant progress has been made in genetic research that has markedly enhanced our comprehension of the genetic factors underlying cerebral palsy development.Moreove r,these genetic factors have been categorized based on the identified gene mutations in patients through clinical genotyping,including thrombosis,angiogenesis,mitochondrial and oxidative phosphorylation function,neuronal migration,and cellular autophagy.Furthermore,exploring targeted genotypes holds potential for precision treatment.In conclusion,advancements in genetic research have substantially improved our understanding of the genetic causes underlying cerebral palsy.These breakthroughs have the potential to pave the way for new treatments and therapies,consequently shaping the future of cerebral palsy research and its clinical management.The investigation of cerebral palsy genetics holds the potential to significantly advance treatments and management strategies.By elucidating the underlying cellular mechanisms,we can develop to rgeted interventions to optimize outcomes.A continued collaboration between researchers and clinicians is imperative to comprehensively unravel the intricate genetic etiology of cerebral palsy.

Allogeneic mesenchymal stem cells may be a viable treatment modality in cerebral palsy

BACKGROUND Cerebral palsy(CP)describes a group of disorders affecting movement,balance,and posture.Disturbances in motor functions constitute the main body of CP symptoms.These symptoms surface in early childhood and patients are affected for the rest of their lives.Currently,treatment involves various pharmacotherapies for different types of CP,including antiepileptics for epilepsy and Botox A for focal spasticity.However,none of these methods can provide full symptom relief.This has prompted researchers to look for new treatment modalities,one of which is mesenchymal stem cell therapy(MSCT).Despite being a promising tool and offering a wide array of possibilities,mesenchymal stem cells(MSCs)still need to be investigated for their efficacy and safety.AIM To analyze the efficacy and safety of MSCT in CP patients.METHODS Our sample consists of four CP patients who cannot stand or walk without external support.All of these cases received allogeneic MSCT six times as 1×106/kg intrathecally,intravenously,and intramuscularly using umbilical cord-derived MSCs(UC-MSC).We monitored and assessed the patients pre-and post-treatment using the Wee Functional Independence Measure(WeeFIM),Gross Motor Function Classification System(GMFCS),and Manual Ability Classification Scale(MACS)instruments.We utilized the Modified Ashworth Scale(MAS)to measure spasticity.RESULTS We found significant improvements in MAS scores after the intervention on both sides.Two months:Rightχ^(2)=4000,P=0.046,leftχ^(2)=4000,P=0.046;four months:Rightχ^(2)=4000,P=0.046,leftχ^(2)=4000,P=0.046;12 months:Rightχ^(2)=4000,P=0.046,leftχ^(2)=4000,P=0.046.However,there was no significant difference in motor functions based on WeeFIM results(P>0.05).GMFCS and MACS scores differed significantly at 12 months after the intervention(P=0.046,P=0.046).Finally,there was no significant change in cognitive functions(P>0.05).CONCLUSION In light of our findings,we believe that UC-MSC therapy has a positive effect on spasticity,and it partially improves motor functions.

Effect of VOJTA Therapy on Gross Motor Function in Children with Cerebral Palsy

Objective: To investigate the effect of VOJTA therapy on gross motor function in children with cerebral palsy. Methods: The 86 children with cerebral palsy were all from the First People’s Hospital of Jingzhou City from January 2023-December 2023, and were divided into the control group and the study group with 43 cases according to the principle of voluntariness. Results: In terms of total effective rate of treatment, the gross motor function scale-88 (GMFM-88) was used to evaluate the effective rate before and after treatment, and the effective rate of the study group was higher than that of the control group, and the difference was statistically significant, and the scores of gross motor items of GMFM-88 were better than those of the control group after treatment, and the difference was statistically significant (P 0.05). Conclusion: The application of VOJTA therapy in the treatment of children with cerebral palsy can not only promote the rehabilitation of gross motor function, but also help to improve the treatment effect, and the earlier the treatment, the better.

穿心莲内酯对耐甲氧西林金黄色葡萄球菌关键耐药蛋白PBP2a的抑制作用

本试验旨在为探究穿心莲内酯(andrographolide, AP)对耐甲氧西林金黄色葡萄球菌(methicillin-resistant Staphylococcus aureus,MRSA)关键耐药蛋白青霉素结合蛋白2a(penicillin binding protein 2a, PBP2a)的抑制作用。采用实时荧光定量PCR检测AP对PBP2a编码基因mecA的转录影响,通过在线软件SWISS-MODEL等对蛋白质结构进行分析,经PyMOL以及AutoDock Tools软件进行分子对接来探究AP与PBP2a结合的可能机制,运用动力学模拟来验证AP与PBP2a蛋白结合的可靠性,进一步原核表达PBP2a并制备其多克隆抗体,通过蛋白质免疫印迹检测AP作用下MRSA中PBP2a蛋白含量的变化。结果显示:64μg/mL的AP即可显著下调mecA的转录水平,AP与PBP2a蛋白的GLU170、GLU239和THR238之间可以形成稳定的氢键作用力;成功表达并纯化获得38 kDa的PBP2a蛋白转肽酶区,且制备出的多克隆抗体可以与PBP2a蛋白特异性结合;随着AP浓度的升高,PBP2a的表达量逐渐降低。总之,本研究分子模拟提示AP对PBP2a蛋白存在抑制潜力,试验结果表明AP可以通过抑制mecA的转录进而抑制PBP2a表达,从而揭示了AP使MRSA对β-内酰胺类抗生素增敏的可能机制。

Role of targeted neuromodulation in the treatment of congenital unilateral lower lip palsy:A clinical case report

Congenital unilateral lower lip palsy(CULLP),or congenital hypoplasia of the depressor anguli oris muscle,also known as asymmetric crying facies,is a rare condition that results in asymmetry of the lower lip during smiling,laughing,and crying.Although the etiology is unknown,weakness of the depressor labii inferioris(DLI)muscle is implicated as a contributing factor.Currently,no well-established treatment options are available.This case report describes an 18-year-old male patient diagnosed with CULLP.Physical examination revealed a symmetric face at rest,but asymmetry when smiling and opening the mouth.Following the administration of lidocaine into the affected DLI muscle,the patient’s smile and lower lip symmetry were immediately restored without any adverse effects.Subsequently,administration of botulinum toxin for neuromodulation of the DLI muscle led to a significant improvement in symmetry and oral function within 2 weeks,which was sustained at 1 month and 3 months post-treatment.No adverse effects were reported,and both patients and families expressed high satisfaction with the outcomes.This case highlights the potential use of neuromodulation as a minimally invasive and effective treatment for CULLP.

Femoral nerve palsy following Girdlestone resection arthroplasty:An observational cadaveric study

BACKGROUND When patients with a failed hip arthroplasty are unsuitable for reimplantation,Girdlestone resection arthroplasty(GRA)is a viable treatment option.We report on a patient who was treated with a GRA due to a periprosthetic infection.We discovered partial paralysis of the quadriceps muscle in this patient.We investigated the femoral nerve anatomy,particularly the nerve entry points,to better understand this phenomenon.AIM To reveal the femoral nerve anatomy with respect to severe proximal migration after GRA.METHODS Eight cadaveric hemipelves were investigated.The branches of the femoral nerve were dissected and traced distally.The GRA was performed by the direct anterior approach.Axial stress to the lower extremity was applied,and the relative movement of the femur was recorded.The femoral nerve and its entry points were assessed.RESULTS GRA led to a 3.8 cm shift of the femur in vertical direction,a 1.8 cm shift in the dorsal direction,and a 2.3 cm shift in the lateral direction.A 36.5°external shift was observed.This caused stress to the lateral division of the femoral nerve.We observed migration of the femoral nerve entry point at the following locations:(1)Vastus medialis(5.3 mm);(2)The medial part of the vastus intermedius(5.4 mm);(3)The lateral part of the vastus intermedius(16.3 mm);(4)Rectus femoris(23.1 mm);(5)Tensor vastus intermedius(30.8 mm);and(6)Vastus lateralis(28.8 mm).CONCLUSION Migration of the femur after GRA altered the anatomy of the femoral nerve.Stress occurred at the lateral nerve division leading to poor functional results.

Etiological Analysis of 248 Cases of Oculomotor Nerve Palsy

Objective:To explore the main causes of oculomotor nerve palsy,providing a reference for clinical diagnosis and treatment.Methods:A total of 248 patients with oculomotor nerve palsy treated in the hospital from January 2016 to January 2018 were selected,and their causes and treatments were summarized.Results:This study found that the main causes of oculomotor nerve palsy were intracranial aneurysms,brain stem lesions,and brain inflammation.A few cases were due to viral infections and congenital oculomotor nerve palsy,while some patients had unknown causes.After treatment in our hospital,most patients experienced relief,although 12 patients died.Conclusion:The etiology of oculomotor nerve palsy is complex,and choosing appropriate drugs during treatment is challenging.Timely identification of the cause is an effective method for treatment.

Mothers’challenges and experiences of children with cerebral palsy:a qualitative meta-synthesis

Objective:To examine what challenges and experiences a mother faces in caring for children with cerebral palsy(CP).As the main caregiver of children with CP,mothers are under multiple pressures.Even though mothers’challenges and experiences of children with CP will affect their quality of life and the rehabilitation of the children,little is known about their challenges and experiences during the whole care.Methods:A qualitative meta-synthesis was conducted to extract and analyze qualitative research from the PubMed,CINAHL,PsycINFO,Web of Science,Ovid and MEDLINE databases.Thirteen articles were selected and analyzed using thematic syntheses.Results:From 2522 screened abstracts,84 texts were reviewed,and 13 studies met the inclusion criteria.Mothers’challenges and experiences of children with CP include 4 themes,both positive and negative.Conclusions:The mothers of children with CP suffer from physical burden,as well as psychological pressure,in the care experience;social and healthcare support are their main challenges.Interventions to help them face the difficulties and adapt to the role of caregivers as soon as possible should target multiple aspects in order to maximize effectiveness,to promote the healthy growth of children with CP.

An overview of acupuncture for the treatment of limb spasticity in cerebral palsy-A mini review

Cerebral palsy is a common chronic disabling disease in children with special needs,and rehabilitation for cerebral palsy is characterized by a long period,multiple methods and limited efficacy.Due to the limited motor function of cerebral palsy patients,the quality of life of patients is reduced,and their ability to participate in society is reduced,so the improvement of patients’motor function has become an important goal of cerebral palsy rehabilitation.The motor function of cerebral palsy has become an important goal of cerebral palsy rehabilitation.Limb spasticity is one of the main clinical signs of cerebral palsy patients,and the more severe the limb spasticity is,the greater the impact on the patient's motor function,so improving limb spasticity in patients with cerebral palsy is particularly important.Acupuncture,as a Chinese medicine treatment method,has been widely used in the clinical treatment of cerebral palsy in China,and has shown certain efficacy.To promote the clinical application of acupuncture technique in cerebral palsy limb spasticity,this paper analyses and summarizes the relevant literature on acupuncture treatment of cerebral palsy limb spasticity summarizes the current status of the clinical application of acupuncture in cerebral palsy limb spasticity,and provides clinical references for the reasonable application of acupuncture in cerebral palsy limb spasticity.

The effect of breaking sitting time with physical activity breaks on cognitive performance in young people with cerebral palsy:an exposure response cross-over feasibility design

Objectives To assess the feasibility of methods and estimate the potential effect of interrupting sedentary behaviour,with intermittent or continuous physical activity breaks,on cognitive performance in young people with Cerebral Palsy.Methods A randomised three-arm exposure response cross-over design with process evaluation.Participants were recruited throughout the Thames Valley,UK between 01/11/2018 to 31/03/2020.The three 2 h activity exposure visits included:(i)sitting only(controls),(ii)sitting plus 20 min of moderate-to-vigorous activity burst,or(iii)4×5 min of moderate-to-vigorous activity bursts,during a 2.5 h sedentary session.Measures of feasibility were sought.Cognitive performance outcomes(using the Eriksen Flanker task and Forward and Backward Digit Span)were delivered before and after the 2 h testing period.Results 36 participants were randomised(age 13.2±2.7,Gross-Motor Functional Classification System 1–3).Study retention was 83%across all three interventions and overall missing data for measures was 4%.A small intervention effect was found in reaction time in the 4×5 min physical activity exposure session compared to the sedentary control condition(0.42;95%CI 0.40 to 0.79).There were two research-related minor adverse effects,an allergic reaction to the FreeStyle Libre and feeling faint and vomiting after consumption of glucose solution.Both events were resolved and participants continued with the study.Conclusions The study design and intervention implementing short bursts of physical activity was feasible and indicated a potential effect on reaction time as a measure of cognitive performance in young people with cerebral palsy.

A Case Report on Treating Progressive Supranuclear Palsy with a Combination of Chinese and Western Medicine

A case of progressive supranuclear palsy in a 66-year-old woman is presented.The patient complained of“progressive stiffness of both lower limbs for five years,accompanied by choking and coughing for more than 1 year,”and was diagnosed with paralysis in traditional Chinese medicine(TCM),which was characterized by a deficiency of liver and kidney,and phlegm and blood stasis blocking the collaterals.Western medicine diagnosed it as progressive supranuclear palsy.The patient was diagnosed with“Parkinson’s disease”several times in the past and was given“polybasic hydrazide”and“amantadine hydrochloride tablets,”etc.The patient did not have significant symptomatic relief,so she sought further treatment with a combination of traditional Chinese and Western medicine.Based on the concept of deficiency and excess,this disease is categorized as a paralytic disease in Chinese medicine,and the onset of the disease is closely related to the deficiency of the body after a long period of illness,with wind,phlegm,blood stasis,and deficiency as the main pathogenetic mechanism.The treatment is based on the combination of disease and evidence,with traditional Chinese medicine and acupuncture as the main treatments,supplemented by intermediate-frequency pulsed electrical stimulation,transcranial repetitive magnetic stimulation,medicated canisters,wax therapy,traditional Chinese medicine guasha,and acupoint injections.Western medicine is based on symptomatic treatment,and the patient’s symptoms were relieved significantly after the combination of Chinese and Western medicine.

基于Bouc-Wen前馈及模糊PID反馈的三层MFC-PBP并联变形翼大位移控制

三层预压缩压电宏纤维复合材料双晶片(MFC-PBP)并联变形翼存在较强的迟滞非线性,严重影响变形控制精度。为了实现对其的精确变形控制,本文提出了以Bouc-Wen逆模型为前馈补偿,以模糊PID作为反馈控制器的三层MFC-PBP并联变形翼的大位移跟踪控制策略。首先,利用遗传算法对Bouc-Wen模型进行参数识别,构建前馈模型并对变形翼进行开环控制;其次,加入模糊PID反馈控制器,得到可以自适应改变PID参数的闭环控制。变形跟踪控制试验结果表明,BoucWen前馈控制的相对误差(RE)约为13.5%,将Bouc-Wen前馈模型与模糊PID结合后控制的相对误差在4%以内,提高了变形控制精度。

Clinical Study on Improving Articulation Clarity in Spastic Cerebral Palsy with 120 Cases of Oral-Facial Acupressure Combined with Oral Placement Therapy

Objective:To observe the efficacy of oral-facial acupressure combined with oral placement therapy(OPT)in improving articulation clarity in 120 children with spastic cerebral palsy,and to explore effective therapeutic solutions for speech disorders associated with spastic cerebral palsy.Methods:A total of 120 children with spastic cerebral palsy and speech disorders,meeting the inclusion criteria,were randomly assigned into two groups:60 cases in the treatment group and 60 cases in the control group.The treatment group received orofacial acupressure combined with OPT,while the control group received only OPT.The Oral Motor Function Assessment Scale(OMFAS),developed by the China Rehabilitation Research Centre(CRRC),was used to evaluate the treatment outcomes before and after the intervention.Results:After the treatment,both the treatment and control groups showed improved mobility of the mandible,lips,and tongue.However,the treatment group exhibited significantly better improvement than the control group,with the difference between the two groups being statistically significant(P<0.05).Conclusion:Oral-facial acupressure combined with OPT can effectively improve articulation clarity in children with spastic cerebral palsy.This combined therapy is recommended for clinical promotion and application.

家蚕蛹和成虫期GOBP/PBP亚家族基因簇基因定位与表达分析

昆虫的气味结合蛋白(odorant binding proteins,OBPs)在昆虫与外界环境化学信息交流过程中起着重要作用,对昆虫觅食、求偶、繁殖具有重要意义。普通气味结合蛋白/性信息素结合蛋白(general odorant binding protein/pheromone binding protein,GOBP/PBP)是鳞翅目昆虫OBP家族的一个重要单系群。为进一步明确家蚕Bombyx moriGOBP/PBP基因的结构、表达及功能,本研究利用染色体定位及半定量表达分析方法对其进行了分析。染色体定位分析显示,这些基因以基因簇的形式存在于第19染色体的nscaf3052上,基因结构相似,转录方向一致,表明这些基因可能由同源基因复制产生,并具有类似功能。对家蚕蛹和成虫不同发育阶段的雌、雄虫多种组织中进行表达分析发现,这些基因的表达在不同发育时期和不同组织间差异明显(P<0.05),相对表达量均以触角中为最高,其他非嗅觉组织中也多有表达,性别间差异不大,说明了该基因簇基因除了具有嗅觉相关的功能外,很可能具有其他尚未被发现的功能。

DnaJ类分子伴侣PBP基因的原核表达及兔抗PBP抗体的制备

目的:在原核系统中表达DnaJ类分子伴侣感光受体外周蛋白结合蛋白(PBP)基因,并制备兔抗PBP的抗体鉴定其特性。方法:应用RTPCR从人胎脑组织总RNA中扩增PBPcDNA。测序后将其克隆到表达载体pET28a中,并在大肠杆菌中以IPTG诱导表达。表达产物经NiNTA亲和层析柱纯化后,用SDSPAGE进行鉴定。以所获纯化的PBP免疫新西兰白兔,制备兔抗PBP抗体。抗体的效价及特异性用Westernblot进行测定和分析。结果:扩增和克隆出了720bp的PBP基因。构建的重组质粒pET28aPBP在大肠杆菌中得到高表达,诱导表达的蛋白存在于包涵体和细菌裂解上清中,纯化的PBP经SDSPAGE鉴定呈单一条带。以纯化的PBP免疫兔,制备了兔抗PBP抗体。Westernblot鉴定证实,该抗体可与原核表达的PBP特异性结合,抗体效价为1∶1600。结论:在原核细胞中表达了具有生物学活性的PBP,并以其为免疫原制备了兔抗PBP的抗体,为进一步研究PBP的结构与生物学活性奠定了基础。

布氏杆菌PBP_(39)蛋白抗原表达及免疫效果的研究

目的 获得纯化的布氏杆菌PBP3 9重组蛋白抗原,观察PBP3 9重组蛋白的免疫原性。方法 扩增不同种布氏杆菌PBP3 9基因,测序、连接表达载体PET3 2a ,诱导表达,柱纯化PBP3 9重组蛋白抗原,免疫BALB/c小鼠,ELISA检测抗体及抗体亚型。结果 我国牛、羊、猪布氏杆菌PBP3 9基因与国外已报道的PBP3 9编码基因不完全相同。在蛋白N端5 8位碱基后多一G ,造成移码突变。故在85、86、87位编码终止子TCA。而在13 4、13 5、13 6位的ATG又编码了新的起始密码。布氏杆菌PBP3 9蛋白在大肠杆菌高效表达,表达量达40 % ,纯化重组蛋白抗原免疫BALB/c小鼠,产生了较高水平的特异性抗体免疫应答,抗体亚型主要是IgG1。结论 我国牛、羊、猪布氏杆菌PBP3 9编码抗原蛋白同国外已报道的不完全相同,纯化的PBP3 9重组蛋白抗原可诱导高水平的抗体反应,为筛选布氏杆菌病新型疫苗保护性抗原分子奠定了基础。

浙江地区青霉素耐药肺炎链球菌PBPs基因及氨基酸序列研究

为阐明浙江地区青霉素耐药肺炎链球菌(PRSP)的青霉素结合蛋白(PBPs)的基因和氨基酸序列的变异特点,对温州医学院自2000年11月～2004年1月收集的26份肺炎链球菌进行分离、鉴定及青霉素药敏实验,并对每株链球菌的PBP1A、PBP2B、PBP2X基因进行PCR扩增和直接测序,通过序列比对与生物信息学分析.结果表明,研究中的PBP1A的主要突变位点是保守基序KTG之后的4个连续氨基酸替换Thr574Ala、Ser575Thr、Gln576Gly、Phe577Tyr和保守序列STMK内的氨基酸替换Thr371Ser;PBP2B的主要突变位点是保守序列SSN之后的氨基酸替换Thr451Ala;PBP2X的主要突变位点是保守基序STMK内的氨基酸替换Thr338Ala.以上突变类型以及菌株的青霉素耐药水平与文献报道相符.研究检测的PRSP的PBPs基因中暂未发现本地区特有的(新的)基因突变,也未检测出文献报道的某些与青霉素抗性相关的氨基酸替换.