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A pilot survey on antimicrobial activity and diversity of soil-derived actinobacteria from different depths in Gudzhirganskoe saline lake in Eastern Siberia

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Journal of Oceanology and Limnology 2023年第4期41卷 1307-1320页

作者： Qin yANG Puyu GUO elena y.abidueva elena V.LAVRENTyEVA Irina M.LISEVICH Ilya A.OSTERMAN Petr V.SERGIEV Shaowei LIU Chunmei XUE Chenghang SUN Department of Microbial Chemistry Institute of Medicinal BiotechnologyChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100050China Beijing Key Laboratory of Antimicrobial Agents Institute of Medicinal BiotechnologyChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100050China College of Life Sciences Jiamusi UniversityJiamusi 154000China Institute of General and Experimental Biology Siberian BranchRussian Academy of SciencesUlan-Ude 670047Russia Center of Life Sciences Skolkovo Institute of Science and TechnologyMoscow 101135Russia Department of Chemistry A.N.Belozersky Institute of Physico-Chemical BiologyLomonosov Moscow State UniversityMoscow 101135Russia

To explore pharmaceutical actinobacteria from salty environments in Siberia,8 soil samples were collected from different depths of Gudzhirganskoe saline lake,the Republic of Buryatia,***,635 actinobacterial strains affiliated with 21 genera in 12 families of 7 orders were obtained by culture-dependent *** predominant genus was Streptomyces(74.5%),followed by Microbacterium(4.9%),Agromyces(3.5%),Nocardiopsis(3.0%),and Kitasatospora(2.5%).Seven strains showed relatively low 16 S rRNA similarities(y described ***-seven strains were selected as representatives to evaluate their antimicrobial activities and underlying mechanisms by paper-disk diffusion method and a double fluorescent protein reporter system(pDualrep 2),*** sp.S 6 b 3-1 was highlighted due to its strong inhibitory activities against Gram-positive bacteria and underlying antibacterial mechanism by inducing the SOS response in the reporter ***-1,(R)-6-[1-(benzoyloxy)ethyl]-phenazine-1-carboxylic acid,an analogue of saphenamycin was finally isolated from the culture broth of Streptomyces *** study preliminarily explored the actinobacterial diversity of soil samples collected in the highly alkaline and saline lake Gudzhirganskoe by culture-dependent approach and their capacity to produce antibiotics for the first time,which revealed that it deserves to make more efforts to discover new actinobacterial species and potential new antibiotics from the saline lake in Eastern Siberia.

关键词： Gudzhirganskoe saline lake actinobacteria diversity antimicrobial activities phenazine antibiotic

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西伯利亚Gudzhirganskoe盐湖土壤放线菌多样性、新颖性及抗菌活性研究

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中国抗生素杂志 2023年第4期48卷 403-412页

作者：杨芹郭普宇 elena y.abidueva 刘少伟李飞娜薛春梅孙承航中国医学科学院北京协和医学院医药生物技术研究所微生物化学研究室北京100050 佳木斯大学生命科学学院佳木斯154000 俄罗斯科学院西伯利亚分院实验与普通生物研究所俄罗斯670047 国家儿童医学中心国家呼吸系统疾病临床医学研究中心教育部儿科重大疾病研究重点实验室首都医科大学附属北京儿童医院北京市儿科研究所儿童呼吸道感染性疾病研究北京市重点实验室呼吸疾病研究室北京100045 中国医学科学院北京协和医学院医药生物技术研究所国家卫健委抗生素生物工程重点实验室北京100050

目的探究西伯利亚Gudzhirganskoe盐湖土壤放线菌多样性、新颖性和活性菌株的次级代谢产物,为放线菌新物种和新抗生素的发现储备菌种资源。方法采用10种分离培养基,利用稀释涂布法进行放线菌的分离纯化;通过PCR扩增和测序,比对16S rRNA... 详细信息

目的探究西伯利亚Gudzhirganskoe盐湖土壤放线菌多样性、新颖性和活性菌株的次级代谢产物,为放线菌新物种和新抗生素的发现储备菌种资源。方法采用10种分离培养基,利用稀释涂布法进行放线菌的分离纯化;通过PCR扩增和测序,比对16S rRNA序列进行放线菌多样性和新颖性分析;采用纸片扩散法对潜在放线菌新物种发酵液的酯相萃取物、水相和菌体相进行抗菌活性筛选;采用反相柱层析、葡聚糖凝胶Sephadex LH-20和半制备HPLC方法分离纯化菌株Hoyosella sp.S15b3-3粗提物的活性成分,通过ESI-MS、NMR波谱数据,并结合文献确定化合物的结构;采用微量稀释法评价化合物1和2的抗菌活性。结果从15份样品中分离获得1343株放线菌,分属于10目23科42属,其中涅斯捷连科菌属、拟诺卡菌属和链霉菌属为优势菌属;15株放线菌与近缘菌株的16S rRNA基因的最高相似度≤98.65%;5株潜在新物种对至少1株检定菌表现出抗菌活性;从Hoyosella sp.S15b3-3中分离鉴定2个已知化合物1(3-吲哚甲醛)和2(2-羟基-1-(3-吲哚)乙酮),化合物1对2株鲍曼不动杆菌(2799和ATCC19606)有一定的抑制作用,MIC值分别为64和32μg/mL。结论西伯利亚Gudzhirganskoe盐湖土壤含有丰富的放线菌资源,且新颖性较高,具有从中发现放线菌新物种和新抗生素的潜力,值得深入研究。

关键词：盐湖放线菌多样性新颖性次级代谢产物

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Calcium-sensitive protein MLC1 as a possible modulator of the astrocyte functional state

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Neural Regeneration Research 2025年第7期20卷 2008-2010页

作者： elena Ambrosini Angela Lanciotti Maria Stefania Brignone Department of Neuroscience Istituto Superiore di SanitàRomeItaly

Astrocytes,the main population of glial cells in the central nervous system(CNS),exert essential tasks for the control of brain tissue homeostasis,supporting neuron and other glial cell activity from the developmental stage to adult *** maintain the optimal functionality of the brain,astroglial cells are particularly committed to reacting to every change in tissue homeostatic conditions,from mild modifications of the physiological environment,a process called astrocyte activation,to the more severe alterations occurring in pathological situations causing astrocyte reactivity or reactive astrogliosis(Escartin et al.,2021).During these reactive states,astrocytes mount an active,progressive response encompassing morphological,molecular,and interactional remodeling,leading to the acquisition of new functions and the loss of others,whose intensity,duration,and reversibility are dependent on the nature of the stimulus and regulated in a context-specific manner.

关键词： alterations modulator maintain

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Beyond wrecking a wall:revisiting the concept of blood–brain barrier breakdown in ischemic stroke

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Neural Regeneration Research 2025年第7期20卷 1944-1956页

作者： Julia Castillo-González elena González-Rey Institute of Parasitology and Biomedicine Lopez-Neyra(IPBLN) CSICPT SaludGranadaSpain

The blood–brain barrier constitutes a dynamic and interactive boundary separating the central nervous system and the peripheral *** tightly modulates the ion transport and nutrient influx,while restricting the entry of harmful factors,and selectively limiting the migration of immune cells,thereby maintaining brain *** the well-established association between blood–brain barrier disruption and most neurodegenerative/neuroinflammatory diseases,much remains unknown about the factors influencing its physiology and the mechanisms underlying its ***,the role of blood–brain barrier breakdown in the translational failure underlying therapies for brain disorders is just starting to be *** review aims to revisit this concept of“blood–brain barrier breakdown,”delving into the most controversial aspects,prevalent challenges,and knowledge gaps concerning the lack of blood–brain barrier *** moving beyond the oversimplistic dichotomy of an“open”/“bad”or a“closed”/“good”barrier,our objective is to provide a more comprehensive insight into blood–brain barrier dynamics,to identify novel targets and/or therapeutic approaches aimed at mitigating blood–brain barrier ***,in this review,we advocate for considering the diverse time-and location-dependent alterations in the blood–brain barrier,which go beyond tight-junction disruption or brain endothelial cell breakdown,illustrated through the dynamics of ischemic stroke as a case *** this exploration,we seek to underscore the complexity of blood–brain barrier dysfunction and its implications for the pathogenesis and therapy of brain diseases.

关键词： blood–brain barrier disruption drug delivery ischemic stroke neuroinflammation tight-junctions

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Context-dependent role of sirtuin 2 in inflammation

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Neural Regeneration Research 2025年第3期20卷 682-694页

作者： NoemíSola-Sevilla Maider Garmendia-Berges MCarmen Mera-Delgado elena Puerta Department of Pharmaceutical Sciences Division of PharmacologySchool of Pharmacy and NutritionUniversity of NavarraPamplonaSpain Navarra Institute for Health Research(IdiSNA) PamplonaSpain

Sirtuin 2 is a member of the sirtuin family nicotinamide adenine dinucleotide(NAD~+)-dependent deacetylases, known for its regulatory role in different processes, including inflammation. In this context, sirtuin 2 has been involved in the modulation of key inflammatory signaling pathways and transcription factors by deacetylating specific targets, such as nuclear factor κB and nucleotide-binding oligomerization domain-leucine-rich-repeat and pyrin domain-containing protein 3(NLRP3). However, whether sirtuin 2-mediated pathways induce a pro-or an anti-inflammatory response remains controversial. Sirtuin 2 has been implicated in promoting inflammation in conditions such as asthma and neurodegenerative diseases, suggesting that its inhibition in these conditions could be a potential therapeutic strategy. Conversely, arthritis and type 2 diabetes mellitus studies suggest that sirtuin 2 is essential at the peripheral level and, thus, its inhibition in these pathologies would not be recommended. Overall, the precise role of sirtuin 2 in inflammation appears to be context-dependent, and further investigation is needed to determine the specific molecular mechanisms and downstream targets through which sirtuin 2 influences inflammatory processes in various tissues and pathological conditions. The present review explores the involvement of sirtuin 2 in the inflammation associated with different pathologies to elucidate whether its pharmacological modulation could serve as an effective strategy for treating this prevalent symptom across various diseases.

关键词： interferon inflammation lipopolysaccharide neuroinflammation NLRP3 nuclear factorκB sirtuin 2

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Data-driven drug repositioning using olfactory omics profiles:challenges and perspectives in neurodegeneration

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Neural Regeneration Research 2025年第7期20卷 1997-1998页

作者： Paz Cartas-Cejudo Adriana Cortés Mercedes Lachén-Montes elena Anaya-Cubero Joaquín Fernández-Irigoyen Enrique Santamaría Clinical Neuroproteomics Unit Proteomics PlatformNavarrabiomedHospitalario Universitario de Navarra(HUN)Universidad Pública de Navarra(UPNA)IdiSNANavarra Institute for Health ResearchPamplonaSpain

Data-driven drug repositioning using olfactory omics profiles-challenges and perspectives in neurodegeneration:Neurodegenerative diseases are characterized by progressive degeneration and loss of neuronal function in the central nervous *** diseases are often characterized as proteinopathies,which are disorders primarily driven by the aggregation or misfolding of specific amyloid proteins within cells,leading to their dysfunction and eventual *** the gain-of-function hypothesis related to the aggregation of these proteins,recently,an alternative hypothesis regarding the loss-of-function of the soluble monomeric proteins during the process of aggregation into amyloids is gaining *** last event is called proteinopenia and refers to conditions characterized by a deficiency or decrease in the levels of specific soluble proteins in the body(Ezzat et al.,2023).It has been demonstrated that levels of soluble proteins involved in neurodegenerative diseases are decreased.

关键词： diseases drug amyloid

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Small heat shock protein B8:from cell functions to its involvement in diseases and potential therapeutic applications

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Neural Regeneration Research 2025年第10期20卷 2872-2886页

作者： Marta Chierichetti Riccardo Cristofani Valeria Crippa Veronica Ferrari Marta Cozzi elena Casarotto Paola Pramaggiore Laura Cornaggia Guglielmo Patelli Ali Mohamed Margherita Piccolella Mariarita Galbiati Paola Rusmini Barbara Tedesco Angelo Poletti Laboratory of Experimental Biology Dipartimento di Scienze Farmacologiche e Biomolecolari“Rodolfo Paoletti”(DiSFeB)Universitàdegli Studi di MilanoMilanItaly

Heat shock protein family B(small)member 8(HSPB8)is a 22 kDa ubiquitously expressed protein belonging to the family of small heat shock ***8 is involved in various cellular mechanisms mainly related to proteotoxic stress response and in other processes such as inflammation,cell division,and ***8 binds misfolded clients to prevent their aggregation by assisting protein refolding or degradation through chaperone-assisted selective *** line with this function,the pro-degradative activity of HSPB8 has been found protective in several neurodegenerative and neuromuscular diseases characterized by protein misfolding and *** cancer,HSPB8 has a dual role being capable of exerting either a pro-or an anti-tumoral activity depending on the pathways and factors expressed by the model of cancer under ***,HSPB8 exerts a protective function in different diseases by modulating the inflammatory response,which characterizes not only neurodegenerative diseases,but also other chronic or acute conditions affecting the nervous system,such as multiple sclerosis and intracerebellar *** note,HSPB8 modulation may represent a therapeutic approach in other neurological conditions that develop as a secondary consequence of other *** is the case of cognitive impairment related to diabetes mellitus,in which HSPB8 exerts a protective activity by assuring mitochondrial *** review aims to summarize the diverse and multiple functions of HSPB8 in different pathological conditions,focusing on the beneficial effects of its ***-based and alternative therapeutic approaches targeting HSPB8 and its regulated pathways will be discussed,emphasizing how new strategies for cell and tissue-specific delivery represent an avenue to advance in disease treatments.

关键词： aggregation autophagy cancer chaperone chaperone-assisted selective autophagy cognitive impairment HSPB8 neuroinflammation neuromuscular diseases therapy

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Palladium installed copper-organic framework for C–C coupling reactions

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Science China Chemistry 2025年

作者： yu-Mei Wang Mei-Xia Tao Kai-Ming Mo Xu Chen Shu-Hua Zhong elena S Shubina Guo-Hong Ning Dan Li College of Chemistry and Materials Science Guangdong Provincial Key Laboratory of Supramolecular Coordination ChemistryJinan University A.N.Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences

The formation of C–C bonds is a crucial aspect of organic synthesis. Synthesists' long-term objective is to identify novel catalysts to optimize reaction systems based on traditional transition metal catalysis. This study explores the synthesis and catalytic potential of palladium-installed covalent metal-organic frameworks(CMOFs) based on copper cyclic trinuclear units(Cu-CTUs). By incorporating palladium ions into the imine-based framework JNM-7 through a straightforward immersion method, we achieved a notable enhancement in catalytic activity for critical C–C coupling reactions, including C–H arylation and Sonogashira cross-coupling. The resulting JNM-7-Pd demonstrated remarkable stability and recyclability, maintaining its efficiency over at least three cycles without any decline in efficiency.

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Impact of intracellular innate immune receptors on immunometabolism

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Cellular & Molecular Immunology 2022年第3期19卷 337-351页

作者： Wei-Chun Chou elena Rampanelli Xin Li Jenny P-y.Ting Lineberger Comprehensive Cancer Center University of North Carolina at Chapel HillChapel HillNC27599USA Department of Genetics University of North Carolina at Chapel HillChapel HillNC27599USA Amsterdam UMC(University Medical Center location AMC)Department of Experimental Vascular MedicineAGEM(Amsterdam Gastroenterology Endocrinology Metabolism)InstituteMeibergdreef 91105 AZAmsterdamThe Netherlands Comparative Immunology Research Center College of Veterinary MedicineChina Agricultural UniversityBeijing100193China

Immunometabolism,which is the metabolic reprogramming of anaerobic glycolysis,oxidative phosphorylation,and metabolite synthesis upon immune cell activation,has gained importance as a regulator of the homeostasis,activation,proliferation,and differentiation of innate and adaptive immune cell subsets that function as key factors in *** changes in epithelial and other stromal cells in response to different stimulatory signals are also crucial in infection,inflammation,cancer,autoimmune diseases,and metabolic *** crosstalk between the PI3K-AKT-mTOR and LKB1-AMPK signaling pathways is critical for modulating both immune and nonimmune cell *** bidirectional interaction between immune cells and metabolism is a topic of intense ***-like receptors(TLRs),cytokine receptors,and T and B cell receptors have been shown to activate multiple downstream metabolic ***,how intracellular innate immune sensors/receptors intersect with metabolic pathways is less well *** goal of this review is to examine the link between immunometabolism and the functions of several intracellular innate immune sensors or receptors,such as nucleotide-binding and leucine-rich repeat-containing receptors(NLRs,or NOD-like receptors),absent in melanoma 2(AIM2)-like receptors(ALRs),and the cyclic dinucleotide receptor stimulator of interferon genes(STING).We will focus on recent advances and describe the impact of these intracellular innate immune receptors on multiple metabolic *** appropriate,this review will provide a brief contextual connection to pathogenic infections,autoimmune diseases,cancers,metabolic disorders,and/or inflammatory bowel diseases.

关键词： Immunometabolism NLRs NLRP3/AIM2 inflammasomes innate sensors/receptors STING AKT-mTOR

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Hormetic effects of abiotic environmental stressors in woody plants in the context of climate change

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Journal of Forestry Research 2023年第1期34卷 7-19页

作者： elena A.Erofeeva Department of Ecology Lobachevsky State University of Nizhni Novgorod23 Gagarina PrNizhni NovgorodRussian Federation 603950

Woody plants contribute to the stability and productivity of terrestrial ecosystems and are significantly affected by climate *** to the concept of environmental hormesis,any environmental stressors can cause hormesis,that is,stimulation in low doses and inhibition in high *** studies have demonstrated plant hormesis under low doses of various abiotic ***,the hormetic responses of woody plants to abiotic stressors from climate change are insufficiently *** review analyses data on the stimulating effects of low doses of climate stressors in experiments and in real *** laboratory and field experiments show that single and combined exposure to various climate stressors(temperature,humidity,and elevated carbon dioxide concentrations) can cause hormesis in various species and functional types of woody plants,which can be accompanied by hormetic trade-offs and *** addition,there is evidence of climate hormesis in woody plants in ecosystem *** experiments in various ecosystems show that elevated temperatures and/or precipitation or elevated carbon dioxide concentrations causing hormesis in dominant tree species can stimulate ecosystem ***,climate hormesis of the growth and reproduction of dominant forest tree species contributes to the spread of forests,that is,climate-driven ecological *** main commonalities of climate hormesis in woody species include:(1) Low-dose climate stressors cause hormesis in woody plants when strong(limiting) stressors do not affect plants or these limiting stressors are mitigated by climate change.(2) Hormesis can occur with the direct impact of climatic stressors on trees and with the indirect impact of these stressors on plants through other parts of the ecosystem.(3)Climate stressor interactions(e.g.,synergism,antagonism)can affect hormesis.(4) Hormesis may disappear due to tree acclimatization with consequent changes in the

关键词： Abiotic stress Ecological succession Ecosystem Forest Hormesis

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