mycology

真菌学
  • 文章类型: Journal Article
    长寿个体已被广泛研究,作为研究肠道微生物群在衰老中的作用的模型,但是它们的肠道真菌几乎没有被发现。这里,我们招募了251名参与者(24-108岁,包括47位百岁老人),来自中国广西,以表征肠道真菌生物群落特征。我们发现肠道真菌在衰老过程中明显变化,并确定衰老是驱动这些变化的主要因素。对于长寿的人来说,核心类群,包括青霉和曲霉,与旧的同行相比,保持了念珠菌肠型的丰富。具有这种肠型的个体更有可能拥有富含年轻人和百岁老人的拟杆菌肠型。此外,念珠菌肠型的驱动因素与拟杆菌肠型中占主导地位的细菌成分呈正相关。我们还确定了富含酵母的潜在有益特征,以区分长寿个体与其他个体。我们的研究结果表明,肠道真菌随着年龄的增长而发育,长寿个体拥有独特的真菌特征。
    Long-lived individuals have been extensively studied as a model to investigate the role of the gut microbiota in aging, but their gut fungi remain almost unexplored. Here, we recruited a community-dwelling cohort of 251 participants (24-108 years, including 47 centenarians) from Guangxi in China to characterize the gut mycobiome signatures. We found gut mycobiome markedly varied during aging and determined aging as a predominant factor driving these variations. For long-lived individuals, core taxa, including Penicillium and Aspergillus, were maintained and Candida enterotype was enriched when compared with old counterparts. Individuals with this enterotype were more likely to possess Bacteroides enterotype enriched in young and centenarians. Moreover, the drivers from Candida enterotype were positively linked with the bacteria components dominated in Bacteroides enterotype. We also identified potentially beneficial yeasts-enriched features to differentiate long-lived individuals from others. Our findings suggest that the gut mycobiome develops with aging, and long-lived individuals possess unique fungal signatures.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    通过真菌活性分解木材对自然碳循环至关重要。木材腐烂有三种主要模式:白腐病,棕色腐烂,和软腐病。然而,木材腐烂的地质记录主要来自化石木材,专门描述新生代之前的白腐病。化石木炭是另一种保存预炭化衰变结构的优良介质。在这项研究中,我们从上二叠纪收集了许多木炭,并观察到表明木材腐烂的多种微观结构。独特的特征与当代木材腐烂类型的症状非常相似,包括去除白腐病中的中间薄片和通道样裂解,棕色腐烂中的枪状孔和波浪状细胞壁,和次生壁内的空洞在软腐病中。这项研究记录了古生代晚期多种木材腐烂类型的早期发生,并提供了在此期间采用的真菌代谢策略范围的见解。
    Wood decomposition through fungal activity is essential to the natural carbon cycle. There are three primary patterns of wood decay: white rot, brown rot, and soft rot. However, geological records of wood decay mainly originate from fossil woods, which exclusively describe white rot before the Cenozoic. Fossilized charcoal is another excellent medium for preserving pre-charring decay structures. In this study, we collected numerous charcoals from the upper Permian and observed multiple microstructures indicative of wood decay. The distinctive characteristics closely resemble the symptoms of contemporary wood-rotting types, including the removal of the middle lamella and channel-like lysis seen in white rot, shot-like holes and wavy cell walls in brown rot, and cavities within the secondary walls in soft rot. This study documents the early occurrences of multiple wood-rotting types during the Late Paleozoic and provides insights into the range of fungal metabolic strategies employed during this period.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Case Reports
    与大多数情况不同,病变位于手背,缺乏瘙痒(瘙痒),并且没有表现出精子样血管,“这通常是经典MF的代名词。
    该研究显示了一个罕见的病例,涉及一名44岁的女性,她的左手拇指根部出现了皮肤状况。最初误诊为色素性紫癜,需要进一步调查以准确确定病情的性质。医学评估包括对患者皮肤疾病的全面分析。进行了一系列诊断检查以确定根本原因。虽然血常规检查结果并不显著,皮疹的独特特征促使人们进行更彻底的调查。随后的评估显示皮肤状况不是色素性紫癜,正如最初假定的那样,而是皮肤T细胞淋巴瘤(CTCL)的表现,称为真菌病(MF)。MF是一种罕见的淋巴瘤,主要影响45-65岁的个体,男女比例为2:1。MF的年发病率为每100,000个人0.3至0.96例。女人的皮肤显示出离散的斑点,上面装饰着彩色的点,逐渐增厚和色素沉着。值得注意的是,没有瘙痒并不能消除怀疑。此病例强调了准确诊断罕见皮肤病以促进适当医疗干预的重要性。皮疹的独特外观及其鲜明的特点,尽管血液结果正常,启用MF的识别。患者的治疗包括类固醇和窄带紫外线疗法的组合。警惕,继续研究,提高意识对于早期干预和改善患者预后至关重要.这些努力有助于加深对这种情况的复杂性的理解。
    UNASSIGNED: Unlike most cases, the lesions were localized to the dorsum of the hand, lacked pruritus (itching), and did not exhibit \"sperm-like blood vessels,\" which are typically pathognomonic to classical MF.
    UNASSIGNED: The study presents a rare case involving a 44-year-old woman who developed a skin condition on the base of her left thumb. Initially misdiagnosed as pigmented purpura, the need for further investigation arose to determine the nature of the condition accurately. The medical evaluation encompassed a comprehensive analysis of the patient\'s skin ailment. A series of diagnostic examinations were conducted to ascertain the underlying cause. Although routine blood tests yielded unremarkable results, the distinct characteristics of the rash prompted a more thorough investigation. Subsequent assessment revealed that the skin condition was not pigmented purpura, as initially presumed, but rather a manifestation of cutaneous T-cell lymphoma (CTCL) known as mycosis fungoides (MF). MF is an infrequent lymphoma predominantly affecting individuals aged 45-65, exhibiting a male-to-female sex ratio of 2:1. The annual incidence of MF ranges from 0.3 to 0.96 cases per 100,000 individuals. The woman\'s skin exhibited discrete patches adorned with colored dots, progressively thickening and pigmentation. Notably, the absence of pruritus did not dispel suspicion. This case underscores the significance of accurately diagnosing uncommon dermatological disorders to facilitate appropriate medical intervention. The unique appearance of the rash and its distinctive features, despite normal blood results, enabled the identification of MF. The patient\'s treatment encompassed a combination of steroids and narrowband UV therapy. Vigilance, continued research, and heightened awareness are paramount for early intervention and improved patient outcomes. Such efforts contribute to an enhanced understanding of the complexities of this condition.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    背景:由于患有各种疾病的免疫功能低下患者的负荷较高,近年来,侵袭性真菌感染(IFIs)的全球负担激增。因此,早期和准确诊断在初始阶段积极遏制真菌感染中的作用变得至关重要。防止危及生命的情况的发展。随着临床真菌学需求的变化,真菌诊断领域已经发展起来,从传统的显微镜和培养方法到更先进的非培养工具还有很长的路要走。随着更强大的方法的出现,如新型PCR检测,T2念珠菌,微流控芯片技术,下一代测序,新一代生物传感器,基于纳米技术的工具,基于人工智能的模型,真菌诊断的面貌不断地变得更好。所有这些进步都已在这里进行了审查,以最有序的方式为我们的读者提供了最新的更新。
    方法:团队进行了详细的文献调查,然后收集数据,相关数据提取,深入分析,并组成各个小节和最终审查。这篇综述是独一无二的,因为它讨论了分子方法的进步;基于血清学的方法的进步;生物传感器技术的进步;以及基于机器学习的模型的进步,都在一个屋檐下。据我们所知,目前还没有关于所有这些领域(尤其是生物传感器技术和使用人工智能的机器学习)与侵袭性真菌感染相关的综述。
    结论:该综述无疑将有助于更新科学界对近期进展的理解,这些进展可能作为传统诊断算法的辅助手段来实施。
    BACKGROUND: The global burden of invasive fungal infections (IFIs) has shown an upsurge in recent years due to the higher load of immunocompromised patients suffering from various diseases. The role of early and accurate diagnosis in the aggressive containment of the fungal infection at the initial stages becomes crucial thus, preventing the development of a life-threatening situation. With the changing demands of clinical mycology, the field of fungal diagnostics has evolved and come a long way from traditional methods of microscopy and culturing to more advanced non-culture-based tools. With the advent of more powerful approaches such as novel PCR assays, T2 Candida, microfluidic chip technology, next generation sequencing, new generation biosensors, nanotechnology-based tools, artificial intelligence-based models, the face of fungal diagnostics is constantly changing for the better. All these advances have been reviewed here giving the latest update to our readers in the most orderly flow.
    METHODS: A detailed literature survey was conducted by the team followed by data collection, pertinent data extraction, in-depth analysis, and composing the various sub-sections and the final review. The review is unique in its kind as it discusses the advances in molecular methods; advances in serology-based methods; advances in biosensor technology; and advances in machine learning-based models, all under one roof. To the best of our knowledge, there has been no review covering all of these fields (especially biosensor technology and machine learning using artificial intelligence) with relevance to invasive fungal infections.
    CONCLUSIONS: The review will undoubtedly assist in updating the scientific community\'s understanding of the most recent advancements that are on the horizon and that may be implemented as adjuncts to the traditional diagnostic algorithms.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    暂无摘要。
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    背景:亚太地区的侵袭性真菌感染(FI)对恶性肿瘤患者构成威胁,不受控制的糖尿病或未诊断/未治疗的人类免疫缺陷病毒感染和获得性免疫缺陷综合征(HIV/AIDS)。充分和早期使用诊断工具和抗真菌药物对于国际金融机构的临床管理和患者生存至关重要。
    方法:调查收集了有关机构概况的详细信息,对FI的自我感知,并获得显微镜,文化,血清学,抗原检测,分子检测,和治疗药物监测。
    结果:截至2022年6月,来自亚太地区40个国家/地区的235个中心回答了问卷。其中一半以上来自六个国家:印度(25%),中国(17%),泰国(5%)印度尼西亚,伊朗,和日本(4%,each).念珠菌属。(93%)和曲霉属。(75%)被认为是最相关的病原体。大多数机构都可以使用显微镜(98%)或基于文化的方法(97%)。此外,其中79%有抗原检测,66%的分子检测,和63%的抗体测试。各国/地区之间获得抗真菌药物的机会各不相同。93%的报告地点至少有一种三唑(伏立康唑[89%]是最常见的霉菌活性唑),而80%的人至少有一种两性霉素B制剂,和72%的至少一种棘白菌素。
    结论:目前,根据提供的答复,在亚洲/太平洋国家/地区,用于国际金融机构诊断和管理的资源各不相同。经济或地理因素可能在这种疾病负担的发生率和临床处理中起关键作用。区域合作可能是克服缺点的好战略。
    BACKGROUND: Invasive fungal infections (IFIs) in Asia/Pacific are a particular threat to patients with malignancies, uncontrolled diabetes mellitus or undiagnosed/untreated human immunodeficiency virus infection and acquired immunodeficiency syndrome (HIV/AIDS). Adequate and early access to diagnostic tools and antifungals is essential for IFI clinical management and patient survival.
    METHODS: Details on institution profile, self-perception on IFI, and access to microscopy, culture, serology, antigen detection, molecular testing, and therapeutic drug monitoring for IFI were collected in a survey.
    RESULTS: As of June 2022, 235 centres from 40 countries/territories in Asia/Pacific answered the questionnaire. More than half the centres were from six countries: India (25%), China (17%), Thailand (5%), Indonesia, Iran, and Japan (4% each). Candida spp. (93%) and Aspergillus spp. (75%) were considered the most relevant pathogens. Most institutions had access to microscopy (98%) or culture-based approaches (97%). Furthermore, 79% of centres had access to antigen detection, 66% to molecular assays, and 63% to antibody tests. Access to antifungals varied between countries/territories. At least one triazole was available in 93% of the reporting sites (voriconazole [89%] was the most common mould-active azole), whereas 80% had at least one amphotericin B formulation, and 72% had at least one echinocandin.
    CONCLUSIONS: According to the replies provided, the resources available for IFI diagnosis and management vary among Asia/Pacific countries/territories. Economical or geographical factors may play a key role in the incidence and clinical handling of this disease burden. Regional cooperation may be a good strategy to overcome shortcomings.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    由炭疽病引起的橄榄果实炭疽病在巴基斯坦是一种严重的流行病,发生于2020年9月。估计的疾病事件记录为59%。炭疽病会导致产量和品质性状的显着降低。在几个果园中发现了炭疽病。农业实践,环境因素,果园之间的疾病侵袭性不同。所以,我们看了孢子大小,文化特质,形态变异,增长模式,来自不同果园的不同菌株的致病性。分子和系统发育分析证实了分离的菌株为炭疽菌。测试了来自橄榄果园的15株针叶树分离株对四种商业杀真菌剂的敏感性(P<0.001)。所检查的分离株的体外杀菌剂敏感性随杀菌剂浓度而变化。观察到苯醚环唑的EC50(有效浓度)值,戊唑醇,多菌灵,和Cyprodinil,范围从0.12到2.69gmL-1。根据真菌生长抑制研究的结果,已发现多菌灵仅是有效减少(P<0.001)由C.acutatum菌株引起的炭疽病的杀菌剂。此外,结果表明,不同杀菌剂的采前处理大大减少了橄榄果实炭疽病的感染(70-90%),收获后的现场应用显着降低了疾病的患病率和严重程度(75-95%)。杀菌剂多菌灵可显着降低橄榄品种收获前后炭疽病的感染。这项研究表明,后一种化合物可用于控制巴基斯坦的橄榄炭疽病,同时降低环境影响和杀菌剂抗性。
    Anthracnose of olive fruit caused by Colletotrichum acutatum was a severe epidemic disease in Pakistan that occurred in September 2020. The estimated disease incident was recorded as 59%. Anthracnose causes a significant reduction in yield and quality traits. Anthracnose has been found in several orchards. Agricultural practices, environmental factors, and disease aggressiveness vary between orchards. Therefore, we looked at spore size, cultural traits, morphological variation, growth pattern, and pathogenicity of different strains of C. acutatum from various orchards. Molecular and phylogenetic analysis confirmed the isolated strains as C. acutatum. In all, 15 C. acutatum isolates from olive orchards were tested for susceptibility to four commercial fungicides (P < 0.001). The examined isolates\' in vitro fungicide sensitivity varied with fungicide concentration. The concentration at which conidial germination was hindered by 50% compared with the control values was observed for difenoconazole, tebuconazole, carbendazim, and cyprodinil, ranging from 0.12 to 2.69 g ml-1. Based on the findings of the fungal growth inhibition studies, carbendazim has been found to be the only fungicide that effectively reduces (P < 0.001) anthracnose caused by C. acutatum strains. Additionally, results revealed that preharvest site treatments of different fungicides greatly decreased anthracnose infections on olive fruit (70 to 90%), and postharvest site applications significantly reduced disease prevalence and severity (75 to 95%). The fungicide carbendazim significantly decreased pre- and postharvest anthracnose infection on olive cultivars. This study suggests that the latter compound might be used to control olive anthracnose in Pakistan while lowering environmental impact and fungicide resistance.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    随着营养质量的变化,由于核糖体的自催化性质,蛋白质组中核糖体蛋白的分数通常与生长速率呈正相关。虽然这种生长规律在多种生物中观察到,核糖体分数和生长速率之间的关系通常比线性更复杂,超出了假设平移速度恒定的模型。这里,我们提出了一个考虑异质翻译速度和蛋白质降解的蛋白质合成的一般框架。我们证明了生长规律曲线通常是特定于环境的,例如,取决于蛋白质之间的翻译速度和核糖体分配之间的相关性。我们对核糖体部分的预测与酿酒酵母的数据定量一致。有趣的是,我们发现大肠杆菌的生长规律曲线仍然具有普遍性,我们证明在缓慢生长的条件下必须表现出向上的弯曲,与实验一致。我们的工作提供了有关基因异质性与细胞行为的环境特异性之间联系的见解。
    As the nutrient quality changes, the fractions of ribosomal proteins in the proteome are usually positively correlated with the growth rates due to the auto-catalytic nature of ribosomes. While this growth law is observed across multiple organisms, the relation between the ribosome fraction and growth rate is often more complex than linear, beyond models assuming a constant translation speed. Here, we propose a general framework of protein synthesis considering heterogeneous translation speeds and protein degradations. We demonstrate that the growth law curves are generally environment-specific, e.g., depending on the correlation between the translation speeds and ribosome allocations among proteins. Our predictions of ribosome fractions agree quantitatively with data of Saccharomyces cerevisiae. Interestingly, we find that the growth law curve of Escherichia coli nevertheless appears universal, which we prove must exhibit an upward bending in slow-growth conditions, in agreement with experiments. Our work provides insights on the connection between the heterogeneity among genes and the environment-specificity of cell behaviors.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    与特征明确的肠道微生物组相反,昆虫体表微生物的组成和功能仍然难以捉摸,并且开发不足。在这里,我们报告了果蝇表面微生物组的动态特征。发现在果蝇表面组装的微生物组可以防御昆虫免受真菌寄生虫感染。细菌载量的大幅增加发生在苍蝇羽化后的10天内,特别是Gilliamella物种的扩张。植物乳杆菌等可培养细菌能有效抑制真菌孢子萌发,并且分离的细菌的微生物添加可以大大延迟无菌果蝇的真菌感染。我们发现,蝇tar骨大部分是细菌细胞积累的,这可以加速细胞扩散到不同的身体部位,以阻止真菌孢子发芽。我们的发现将有助于将来研究影响昆虫生理的表面微生物。
    In contrast to the well-characterized gut microbiomes, the composition and function of the insect body-surface microbiotas are still elusive and highly underexplored. Here we report the dynamic features of the Drosophila melanogaster surface microbiomes. It was found that the microbiomes assembled on fly surfaces could defend insects against fungal parasitic infections. The substantial increase of bacterial loads occurred within 10 days of fly eclosion, especially the expansion of Gilliamella species. The culturable bacteria such as Lactiplantibacillus plantarum could effectively inhibit fungal spore germinations, and the gnotobiotic addition of the isolated bacteria could substantially delay fungal infection of axenic flies. We found that the fly tarsal segments were largely accumulated with bacterial cells, which could accelerate cell dispersal onto different body parts to deter fungal spore germinations. Our findings will facilitate future investigations of the surface microbiotas affecting insect physiologies.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    了解真菌对海底沉积环境的基因组进化和适应策略,我们从头组装了从~2.0km深分离的裂殖菌属菌株20R-7-F01的基因组,〜20-millianyearsago(Mya)含煤沉积物。系统发育组学研究显示,该菌株与陆地型菌株H4-8之间的分化时间为28-73Mya,与沉积物年龄记录一致。比较基因组分析表明,FunK1蛋白激酶,NmrA家族,并且该菌株中的转座子显着扩展,可能与数百万年来沉积物的环境适应性和持久性有关。对来自不同生境的14个S.commune菌株的重新测序研究表明,海底菌株的核苷酸多样性要低得多,替代率,和同源重组率比其他菌株,反映海底菌株的生长和/或繁殖极其缓慢。我们的数据为海底沉积生物圈中真菌的适应和长期生存提供了新的见解。
    To understand the genomic evolution and adaptation strategies of fungi to subseafloor sedimentary environments, we de novo assembled the genome of Schizophyllum commune strain 20R-7-F01 isolated from ∼2.0 km-deep, ∼20-millionyearsago (Mya) coal-bearing sediments. Phylogenomics study revealed a differentiation time of 28-73 Mya between this strain and the terrestrial type-strain H4-8, in line with sediment age records. Comparative genome analyses showed that FunK1 protein kinase, NmrA family, and transposons in this strain are significantly expanded, possibly linking to the environmental adaptation and persistence in sediment for over millions of years. Re-sequencing study of 14 S. commune strains sampled from different habitats revealed that subseafloor strains have much lower nucleotide diversity, substitution rate, and homologous recombination rate than other strains, reflecting that the growth and/or reproduction of subseafloor strains are extremely slow. Our data provide new insights into the adaptation and long-term survival of the fungi in the subseafloor sedimentary biosphere.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

公众号