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Genomic runs of homozygosity and structural variation reveal muscle development-related genes in Qinghai-Tibetan Plateau yaks
IF 2.2 2区 生物学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2026-03-01 Epub Date: 2025-10-24 DOI: 10.1016/j.cbd.2025.101664
Jianghao Chang , Rong Huang , Wei Peng , Yibing Yue , Huawei Su , Yang He , Weiru Song , Chuzhao Lei , Rende Song , Jun Zhang , Yongzhen Huang
This study investigated genomic structural variations and their association with muscle development in Qinghai-Tibetan Plateau yaks to elucidate their genetic diversity and adaptive mechanisms. Whole-genome resequencing was performed on 145 Qinghai-Tibetan Plateau yaks, supplemented with sequence data from 12 wild yaks obtained from the National Center for Biotechnology Information (NCBI) database. Analyses characterized runs of homozygosity (ROH), copy number variations (CNV), and structural variations (SV). A genome-wide copy number variation map for Qinghai Plateau yaks was constructed. Qinghai-Tibetan Plateau yaks exhibited numerous ROHs (totaling 61,074 segments, covering 19,947.56 Mb), showing relatively high levels of genomic homozygosity compared to wild yaks (3255 segments, 1056.66 total length), and 1175 CNV regions and 59,694 SVs, primarily located in non-coding regions, were identified. Publicly available transcriptome data were integrated to identify candidate genes related to muscle development, followed by statistical validation of key candidates. Integrating genomic and transcriptomic data revealed 84 overlapping genes potentially involved in muscle development. Subsequent bioinformatic prioritization identified PTPN6, ATP2A1, LCP1, GNA15, ALOX5AP, FLT3, SLC34A3, and BCL11A as high-priority candidate genes potentially influencing this trait. These findings demonstrate that genomic variations significantly impact muscle development in Qinghai-Tibetan Plateau yaks, providing a valuable molecular basis for future yak breeding programs and adaptation research.
分析确定了纯合子(ROH)、拷贝数变异(CNV)和结构变异(SV)的性状。构建了青海高原牦牛基因组拷贝数变异图谱。共鉴定出1175个CNV区和59,694个sv区,主要位于非编码区,与野生牦牛(3255个片段,总长度1056.66)相比,具有较高的基因组纯合性。整合公开可用的转录组数据以确定与肌肉发育相关的候选基因,然后对关键候选基因进行统计验证。整合基因组和转录组数据揭示了84个重叠基因可能参与肌肉发育。随后的生物信息学优先级确定了PTPN6、ATP2A1、LCP1、GNA15、ALOX5AP、FLT3、SLC34A3和BCL11A作为可能影响该性状的高优先级候选基因。
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引用次数: 0
Transcriptome analysis and exploration of immune key genes of hepatopancreas after Poly(I:C) stimulation in Amphioctopus fangsiao 聚(I:C)刺激方小角章鱼肝胰脏免疫关键基因转录组分析与探索。
IF 2.2 2区 生物学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2026-03-01 Epub Date: 2025-10-23 DOI: 10.1016/j.cbd.2025.101665
Xiaolan Huang , Jingjing Gu , Zhen Huang , Xuebo Cui , Daowen Qiu , Zan Li , Yanwei Feng , Xiaohui Xu , Jianmin Yang
Amphioctopus fangsiao is a commercially valuable cephalopod species prized for its distinctive flavor and nutritional profile. However, its large-scale aquaculture is hampered by significant challenges, particularly outbreaks of infectious diseases. Viral pathogens, which can be co-transmitted among marine species, pose a severe threat to sustainable population development. To elucidate the antiviral defense mechanisms in A. fangsiao, we conducted transcriptomic profiling of hepatopancreatic tissue following stimulation with polyinosinic-polycytidylic acid (Poly(I:C)), a well-established viral mimic known to activate innate immune pathways. Comparative transcriptomic profiling of the hepatopancreas—a key immune organ—at 6 h and 24 h post-stimulation identified 1406 and 904 differentially expressed genes (DEGs), respectively. Functional enrichment analysis revealed that these DEGs were significantly involved in critical immune-related pathways, including apoptosis, ECM-receptor interaction, and the MAPK and Hippo signaling pathways. Furthermore, by integrating protein-protein interaction (PPI) network analysis with KEGG pathway data, we identified 18 hub genes—such as TNFSF10, JUN, EGFR, and CTSB—that were potential key regulators of the antiviral response. The expression patterns of the aforementioned hub genes were successfully validated by means of quantitative reverse transcription polymerase chain reaction (qRT-PCR). This study comprehensively revealed the transcriptome characteristics of antiviral immune response of A. fangsiao for the first time. Our findings not only advance the understanding of innate immunity in cephalopods but also offer valuable genetic resources and potential molecular targets for developing strategies against viral diseases in octopus aquaculture.
方小两栖章鱼是一种具有商业价值的头足类动物,因其独特的风味和营养价值而备受推崇。然而,它的大规模水产养殖受到重大挑战的阻碍,特别是传染病的爆发。病毒性病原体可在海洋物种间共传播,对种群的可持续发展构成严重威胁。为了阐明方草的抗病毒防御机制,我们对肝胰腺组织进行了转录组学分析,这些转录组学分析是在多肌苷-多胞苷酸(Poly(I:C))刺激下进行的,多肌苷-多胞苷酸是一种已知的激活先天免疫途径的病毒模拟物。在刺激后6小时和24小时,肝胰腺(一个关键的免疫器官)的比较转录组学分析分别鉴定了1406和904个差异表达基因(DEGs)。功能富集分析显示,这些deg显著参与关键的免疫相关通路,包括细胞凋亡、ecm受体相互作用以及MAPK和Hippo信号通路。此外,通过将蛋白-蛋白相互作用(PPI)网络分析与KEGG通路数据相结合,我们确定了18个枢纽基因,如TNFSF10、JUN、EGFR和ctsb,它们是抗病毒反应的潜在关键调节因子。通过定量反转录聚合酶链反应(qRT-PCR)成功验证了上述枢纽基因的表达模式。本研究首次全面揭示了方苕抗病毒免疫应答的转录组特征。本研究结果不仅促进了对头足类动物先天免疫的认识,而且为章鱼养殖中病毒性疾病的防治策略提供了宝贵的遗传资源和潜在的分子靶点。
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引用次数: 0
The metabolome of humpback whales (Megaptera novaeangliae) reveals clues as to their extreme fasting capabilities 座头鲸(Megaptera novaeangliae)的代谢组揭示了它们极端禁食能力的线索
IF 2.2 2区 生物学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2026-03-01 Epub Date: 2025-11-03 DOI: 10.1016/j.cbd.2025.101670
Erika Oteri , Ido Bar , Steven D. Melvin , Eleanor Raffan , Susan Bengtson Nash
Southern Hemisphere humpback whales are capital breeders, relying on energy reserves accumulated through summer feeding in the Southern Ocean to fuel reproduction and migration. Understanding the fasting physiology of these populations, which lose up to 50 % of their post-summer feeding body mass during seasonal migration, is of great importance, particularly in the context of a rapidly changing Antarctic sea-ice ecosystem. Additionally, fluctuations in lipid reserves are known to mobilise lipophilic contaminants, potentially rendering seasonal fasting a time of elevated toxicological risk. This study analysed blubber biopsies from humpback whales migrating along the east coast of Australia. Biopsies were collected at two timepoints on the migration, corresponding to ∼3 and 6 months fasted, respectively. Nuclear Magnetic Resonance spectroscopy identified 32 polar metabolites in blubber, mainly involved in fatty acid and amino acid metabolism. Eleven of these metabolites showed significant differences between the two fasting stages, indicating changes in fatty acid oxidation, body condition, protein catabolism and glucose conservation. This is the first study to investigate the polar metabolomic alterations associated with migration in humpback whales, providing insights into biochemical pathways related to their fasting physiology. Metabolomic analysis holds the potential to identify metabolite patterns linked to nutritional and environmental stress, critical for ongoing biomonitoring of the Antarctic ecosystem.
南半球座头鲸是重要的繁殖者,依靠夏季在南大洋觅食积累的能量储备来繁殖和迁徙。了解这些种群的禁食生理是非常重要的,特别是在南极海冰生态系统迅速变化的背景下,这些种群在夏季后的摄食体重在季节性迁徙期间损失高达50%。此外,已知脂质储备的波动会调动亲脂污染物,可能使季节性禁食成为毒性风险升高的时间。这项研究分析了沿澳大利亚东海岸迁徙的座头鲸的鲸脂活检。在迁移的两个时间点采集活检,分别对应于禁食3个月和6个月。核磁共振波谱鉴定出鲸脂中32种极性代谢产物,主要参与脂肪酸和氨基酸代谢。其中11种代谢物在两个禁食阶段表现出显著差异,表明脂肪酸氧化、身体状况、蛋白质分解代谢和葡萄糖保存的变化。这是第一个研究与座头鲸迁移相关的极地代谢组学改变的研究,为其禁食生理学相关的生化途径提供了见解。代谢组学分析具有识别与营养和环境压力相关的代谢物模式的潜力,这对正在进行的南极生态系统生物监测至关重要。
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引用次数: 0
Transcriptomic analysis of the hepatopancreas response to low-pH stress in kuruma shrimp (Marsupenaeus japonicus) 日本袋虾肝胰腺对低ph胁迫响应的转录组学分析
IF 2.2 2区 生物学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2026-03-01 Epub Date: 2025-11-01 DOI: 10.1016/j.cbd.2025.101667
Yongkang Hou , Caifeng Liang , Dekhkonova Dilorakhon Rasuljon Kizi , Jianyong Liu
Ocean acidification has emerged as a globally recognized environmental issue, posing a serious threat to marine ecosystems. To elucidate the adaptive mechanisms of Marsupenaeus japonicus under acidified conditions, both biochemical and transcriptomic analyses were performed following low-pH exposure. Biochemical assays revealed that low pH stress significantly SOD and CAT activities while markedly elevating MDA levels, indicating oxidative damage. T-AOC exhibited a transient rise followed by a sharp decline at later stages, suggesting initial activation and subsequent exhaustion of antioxidant defense. Transcriptomic profiling identified 2705 DEGs that were primarily enriched in pathways related to immune regulation, redox balance, apoptosis, and energy metabolism, including the lysosome, Toll-like receptor, and PPAR signaling pathways. Protein interaction analysis identified 9 hub genes, including NADH-GOGAT and MDHM, which may play key roles in antioxidant defense and metabolic regulation. The integration of enzyme activity and transcriptomic data indicates that acid stress initially induces oxidative imbalance, followed by compensatory activation of antioxidant and immune systems to restore cellular homeostasis. These findings provide comprehensive insights into the oxidative stress adaptation of M. japonicus and offer a genetic and physiological foundation for breeding acid-tolerant shrimp strains.
海洋酸化已成为全球公认的环境问题,对海洋生态系统构成严重威胁。为了阐明日本袋猴在酸化条件下的适应机制,在低ph条件下进行了生化和转录组学分析。生化分析显示,低pH胁迫显著提高SOD和CAT活性,同时显著升高MDA水平,提示氧化损伤。T-AOC表现出短暂的上升,随后在后期急剧下降,表明初始激活和随后的抗氧化防御耗尽。转录组学分析鉴定了2705个主要富集于免疫调节、氧化还原平衡、细胞凋亡和能量代谢相关通路的deg,包括溶酶体、toll样受体和PPAR信号通路。蛋白质互作分析鉴定出包括NADH-GOGAT和MDHM在内的9个枢纽基因,它们可能在抗氧化防御和代谢调节中发挥关键作用。酶活性和转录组学数据的整合表明,酸胁迫最初诱导氧化失衡,随后补偿性激活抗氧化和免疫系统以恢复细胞稳态。这些发现为日本对虾对氧化应激的适应提供了全面的认识,并为耐酸对虾品系的选育提供了遗传和生理基础。
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引用次数: 0
Integrative analysis of FOX genes in fish: Evolution, structure, and functional roles in environmental stress tolerance and growth regulation in Mugil cephalus 鱼类FOX基因的综合分析:Mugil cephalus在环境胁迫耐受和生长调节中的进化、结构和功能作用。
IF 2.2 2区 生物学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2026-03-01 Epub Date: 2025-11-08 DOI: 10.1016/j.cbd.2025.101685
Urwah Ishaque , Saima Naz , Jhan Zeb , Ahmad Manan Mustafa Chatha , Ghazi Alatawi , Saba Iqbal , Bushra Irfan
The forkhead box (FOX) gene family encodes transcription factors that control growth, development, stress response, and metabolism across vertebrates. While FOX genes have been widely explored in a few model fish species, their roles in Mugil cephalus, a commercially and ecologically important euryhaline species, are still not well described. Current study, explored the first ever genomic and structural analysis of FOX genes in M. cephalus. In this study, 42 FOX genes were identified in the genome of M. cephalus and the presence of conserved forkhead domains was confirmed. The study showed that there are significant differences in the physicochemical traits of studied proteins and the phylogenetic analysis grouped these proteins into 18 clades. Duplication history pointed toward a number of genome-wide duplication events, with all of them shaped mainly by purifying selection. The synteny analysis suggested that chromosomal arrangements were mostly conserved with humans, indicating a deep evolutionary link. The organization of Motif and domains pointed toward functional diversification, while structure modeling (2D and 3D) revealed noticeable variation in folding patterns of amino acids. Moreover, mutation predictions reported various destabilizing substitutions that could weaken the stability of proteins. In conclusion, this study gives the first integrated overview of FOX genes in M. cephalus, opening new perspectives on their evolution and possible functions in vertebrate species. Experimental studies are aimed in future to confirm the role of FOX genes for improved aquaculture practices, stress tolerance, and bio-conservation of M. cephalus.
叉头盒(FOX)基因家族编码控制脊椎动物生长、发育、应激反应和代谢的转录因子。虽然FOX基因已经在一些模式鱼类中得到了广泛的探索,但它们在Mugil cephalus(一种具有商业和生态重要性的广盐物种)中的作用仍然没有得到很好的描述。本研究首次探索了头头棘球蚴FOX基因的基因组和结构分析。在本研究中,在头头猪基因组中鉴定出42个FOX基因,并证实了保守叉头结构域的存在。研究表明,所研究的蛋白质在理化性状上存在显著差异,系统发育分析将这些蛋白质归为18支。复制历史指出了许多全基因组复制事件,所有这些事件都主要是由纯化选择形成的。合成分析表明,染色体排列大多与人类保守,表明一个深刻的进化联系。Motif和结构域的组织指向功能多样化,而结构建模(2D和3D)揭示了氨基酸折叠模式的显著变化。此外,突变预测报告了各种不稳定的取代,这些取代可能削弱蛋白质的稳定性。综上所述,本研究首次对头头螺杆菌FOX基因进行了全面的综述,为其在脊椎动物物种中的进化及其可能的功能开辟了新的视角。未来的实验研究旨在证实FOX基因在改善头头m.s cephalus的养殖方式、抗逆性和生物保护方面的作用。
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引用次数: 0
Identification and expression analysis of long noncoding RNAs in response to infection with VHSV in rainbow trout 虹鳟鱼VHSV感染应答长链非编码rna的鉴定与表达分析。
IF 2.2 2区 生物学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2026-03-01 Epub Date: 2025-11-01 DOI: 10.1016/j.cbd.2025.101673
Mahmood Tavakoli-Alamouti , Ghodrat Rahimi-Mianji , Ardeshir Nejati-Javaremi , Ayoub Farhadi , Elham Younesi-Melerdi
Viral infections in the aquaculture industry present a significant challenge that requires further investigation. Emerging evidence suggests that long noncoding RNAs (lncRNAs) play a crucial role in regulating various biological processes, including immune responses. However, most studies have focused on model organisms, leaving a gap in knowledge about non-coding RNAs in response to viral hemorrhagic septicemia (VHS) in rainbow trout. In this study, we investigated the profile of non-coding RNAs (ncRNAs) and their targeting-related subjects in the spleen of rainbow trout challenged with the VHS virus. We explored their potential roles in immune defense responses through transcriptomic analysis of both virus-treated and control groups. Our analysis identified 4207 lncRNAs from 7753 transcripts, with many categorized as potentially novel isoforms (code = j) and intergenic lncRNAs (code = u). The expression analysis demonstrated the impact of viral infection on the expression levels of lncRNAs and their target genes. The results showed 182 lncRNAs and 1326 mRNAs with differential expression. We identified pairs of DElncRNA-DEmRNA interactions, such as “TP63-MSTRG.62, IL10-MSTRG.9783, IL10-MSTRG.9784, TK1-MSTRG.22826, and GLI1-MSTRG.17881” as cis interactions, while DOCK10-MSTRG.30015, MSTRG.36357-LOC101268921, and MSTRG.34190-ENPP2 exhibited trans interactions. Additionally, key signaling pathways, including the PPAR signaling pathway, Toll-like receptor signaling pathway, and p53 pathway, were revealed as critical responders to viral infection linked to lncRNAs. We also introduced quantitative trait loci (QTLs) associated with these lncRNAs, underscoring their potential regulatory roles in viral stress responses. Overall, our findings provide novel insights into the molecular mechanisms underlying viral infections and lncRNA-mediated host immune responses.
水产养殖业中的病毒感染是一项重大挑战,需要进一步调查。越来越多的证据表明,长链非编码rna (lncRNAs)在调节包括免疫应答在内的各种生物过程中起着至关重要的作用。然而,大多数研究都集中在模式生物上,对虹鳟鱼病毒性出血性败血症(VHS)的非编码rna反应的认识存在空白。在这项研究中,我们研究了VHS病毒攻击虹鳟鱼脾脏中的非编码rna (ncRNAs)及其靶向相关主体的谱图。我们通过对病毒处理组和对照组的转录组分析,探索了它们在免疫防御反应中的潜在作用。我们的分析从7753个转录本中鉴定出4207个lncrna,其中许多被归类为潜在的新亚型(代码= j)和基因间lncrna(代码= u)。表达分析证实了病毒感染对lncrna及其靶基因表达水平的影响。结果显示182个lncrna和1326个mrna存在差异表达。我们鉴定了DElncRNA-DEmRNA相互作用对,如“TP63-MSTRG”。62年,IL10-MSTRG。9783年,IL10-MSTRG。9784年,TK1-MSTRG。GLI1-MSTRG。作为cis相互作用,而DOCK10-MSTRG。30015、MSTRG.36357-LOC101268921和MSTRG.34190-ENPP2表现出反式相互作用。此外,关键的信号通路,包括PPAR信号通路、toll样受体信号通路和p53信号通路,被发现是与lncRNAs相关的病毒感染的关键应答者。我们还介绍了与这些lncrna相关的数量性状位点(qtl),强调了它们在病毒应激反应中的潜在调节作用。总的来说,我们的发现为病毒感染和lncrna介导的宿主免疫反应的分子机制提供了新的见解。
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引用次数: 0
Transcriptomic analysis reveals stage-specific cholesterol metabolism and steroidogenic in theca layer cells during follicular development in chickens 转录组学分析揭示了鸡卵泡发育过程中卵泡层细胞的阶段特异性胆固醇代谢和类固醇生成。
IF 2.2 2区 生物学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2026-03-01 Epub Date: 2025-11-06 DOI: 10.1016/j.cbd.2025.101682
Yuechen Liao , Ashi Li , Yangqiwen Luo , Runbang Zhu , Cangning Zhang , Meng Ma , Yongfeng Li , Liumei Sun , Manman Shen , Liang Qu
Ovarian follicle development is a critical factor affecting laying performance in poultry. Follicles are mainly composed of the granulosa layer cells and theca layer cells (TLs). However, the regulatory role of TLs remains inadequately understood. This study explored the abundance of differentially expressed genes (DEGs) in chicken TLs across small yellow follicles (SYFT), the smallest hierarchical follicle (F6T), and the largest hierarchical follicle (F1T) through transcriptome analysis. Results revealed that the top abundance DEGs were linked to cholesterol metabolism (MSMO1, NPC1) and steroid hormone synthesis (STAR, CYP11A1, CYP19A1, POR, NR0B1). Notably, genes involved in steroid hormone synthesis (STAR, CYP11A1, and CYP19A1) were highly expressed at the F6T stage. Up-regulated DEGs in F6T were primarily enriched in metabolism pathways, including one carbon pool by folate and citrate cycle, which contribute to elevated cholesterol synthesis (MSMO1) at this stage. While cholesterol metabolism (NPC1, NR0B1, and POR) were prominent at the SYFT stage, where up-regulated DEGs were linked to cell differentiation such as Wnt and mTOR signaling pathways. Key genes including CYP19A1, CYP17A1, POR, NPC1, VLDLR, and NR0B1 were predominantly found in profiles 3 and 1, which represented significant trends identified through trend analysis. The main KEGG pathways included cell cycle, homologous recombination, metabolism and transport. This study highlights that TLs shift their transcriptional program from cholesterol transport in small yellow follicles to cholesterol synthesis and steroidogenesis in hierarchical follicles, revealing a key transcriptional program governing follicle development in chickens.
卵泡发育是影响家禽产蛋性能的关键因素。卵泡主要由颗粒层细胞和卵泡层细胞组成。然而,人们对TLs的调控作用仍然知之甚少。本研究通过转录组分析,探讨了鸡小黄卵泡(SYFT)、最小分层卵泡(F6T)和最大分层卵泡(F1T)的TLs中差异表达基因(DEGs)的丰度。结果显示,最高丰度的deg与胆固醇代谢(MSMO1, NPC1)和类固醇激素合成(STAR, CYP11A1, CYP19A1, POR, NR0B1)有关。值得注意的是,参与类固醇激素合成的基因(STAR、CYP11A1和CYP19A1)在F6T阶段高度表达。F6T中deg的上调主要富集在代谢途径中,包括叶酸和柠檬酸循环的碳库,这有助于提高该阶段的胆固醇合成(MSMO1)。而胆固醇代谢(NPC1, NR0B1和POR)在SYFT阶段表现突出,其中上调的deg与细胞分化(如Wnt和mTOR信号通路)有关。关键基因CYP19A1、CYP17A1、POR、NPC1、VLDLR和NR0B1主要出现在图谱3和1中,通过趋势分析发现了显著的趋势。KEGG的主要途径包括细胞周期、同源重组、代谢和转运。本研究强调,TLs将其转录程序从黄色小卵泡中的胆固醇转运转移到等级卵泡中的胆固醇合成和类固醇生成,揭示了控制鸡卵泡发育的关键转录程序。
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引用次数: 0
Integrative analysis of transcriptomics and gut microbiome in grass carp under alkalinity stress 碱化胁迫下草鱼转录组学与肠道微生物组的综合分析。
IF 2.2 2区 生物学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2026-03-01 Epub Date: 2025-11-25 DOI: 10.1016/j.cbd.2025.101698
Jianlin Guo , Yi Xu , Qi Chen , Haiqi Zhang
Alkalinity, a key environmental stressor in saline-alkali ecosystems, adversely affects the growth and survival of aquatic organisms. Genetic improvement of alkali-tolerant fish strains offers a promising strategy for utilizing saline-alkaline water resources; however, the molecular mechanisms underlying the response to alkalinity stress remain inadequately understood. This study aimed to identify novel molecular signatures of alkaline exposure in grass carp by integrating gut microbiome profiling with host transcriptome data. Histological analysis revealed significant alterations in the height of intestinal folds, muscle layer thickness, and fold width in response to NaHCO₃ exposure, along with an increased number of goblet cells under alkalinity stress. Differential gene expression (DEGs) analysis identified 1620, 6564, and 3190 genes with significant expression changes at 24, 48, and 72 h of NaHCO₃ treatment, respectively, compared to controls. Several known alkalinity-responsive genes, such as aquaporin 1a (aqp1a), carbonic anhydrase 6 (ca6), heat shock protein 30 (hsp30), prostaglandin-endoperoxide synthase 2b (ptgs2b), caspase 23 (casp23), solute carrier family 7a (slc7a), toll-like receptor 5 (tlr5), and toll-like receptor 13 (tlr13), were identified and validated through real-time quantitative PCR. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses revealed that immune- and disease-related signaling pathways played critical roles in mitigating acute alkaline stress. Furthermore, a total of 1,521,323 quality-filtered sequences with an average of 416 bp in length were generated through 16S rRNA sequencing. Bioinformatics analysis indicated that NaHCO₃ exposure reduced microbial diversity and altered the gut microbiota composition in grass carp. Notably, Fusobacteriota abundance significantly increased, while Firmicutes and Proteobacteria decreased substantially at 48 h post-alkalinity stress. Integrative analysis further highlighted strong correlations between specific bacterial taxa and alkalinity-responsive differentially expressed genes (DEGs). These findings provided valuable insights into the molecular mechanisms underlying alkalinity stress and identified potential targets for molecular breeding to enhance alkaline tolerance in grass carp.
碱度是盐碱生态系统中重要的环境胁迫因子,对水生生物的生长和生存产生不利影响。耐碱鱼类品系的遗传改良为盐碱水资源的利用提供了一条有前景的途径;然而,对碱度胁迫反应的分子机制尚不清楚。本研究旨在通过整合肠道微生物组分析和宿主转录组数据来鉴定草鱼碱暴露的新分子特征。组织学分析显示,在NaHCO₃暴露下,肠道褶皱的高度、肌肉层厚度和褶皱宽度发生了显著变化,同时在碱度压力下杯状细胞的数量也有所增加。差异基因表达(DEGs)分析发现,与对照组相比,在NaHCO₃处理24、48和72 h时,分别有1620、6564和3190个基因的表达发生了显著变化。通过实时定量PCR鉴定并验证了水孔蛋白1a (aqp1a)、碳酸酐酶6 (ca6)、热休克蛋白30 (hsp30)、前列腺素内过氧化物合成酶2b (ptgs2b)、半胱天冬酶23 (casp23)、溶质载体家族7a (slc7a)、toll样受体5 (tlr5)和toll样受体13 (tlr13)等几个已知的碱度反应基因。基因本体(GO)和京都基因与基因组百科全书(KEGG)途径富集分析表明,免疫和疾病相关的信号通路在缓解急性碱性胁迫中发挥了关键作用。通过16S rRNA测序,共获得1521323条质量过滤序列,平均长度为416 bp。生物信息学分析表明,NaHCO₃暴露降低了草鱼肠道微生物的多样性,改变了草鱼肠道微生物群的组成。值得注意的是,在碱度胁迫48 h后,梭杆菌门的丰度显著增加,而厚壁菌门和变形菌门的丰度显著减少。综合分析进一步强调了特定细菌分类群与碱度反应差异表达基因(DEGs)之间的强相关性。这些发现为揭示草鱼碱胁迫的分子机制提供了有价值的见解,并确定了提高草鱼碱耐受性的分子育种的潜在靶点。
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引用次数: 0
Hydrolyzed Debaryomyces hansenii yeasts as paraprobiotics in fish: Omics-based characterization of Atlantic salmon gut during a natural pathogen outbreak in seawater stage 水解的汉氏Debaryomyces hansenii酵母作为鱼类的副益生菌:大西洋鲑鱼肠道在海水阶段自然病原体爆发期间的组学特征。
IF 2.2 2区 生物学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2026-03-01 Epub Date: 2025-10-30 DOI: 10.1016/j.cbd.2025.101671
Byron Morales-Lange , Sérgio D.C. Rocha , Arturo Vera-Ponce de León , Matthias Hötzinger , Liv Torunn Mydland , Brankica Djordjevic , Phillip B. Pope , Margareth Øverland
Feed additives are an alternative to improve fish performance and health (without compromising growth) during farming conditions. To determine the physiological effects of two hydrolyzed Debaryomyces hansenii yeasts (LAN4 and LAN6 from Lallemand SAS) on the gut of post-smolts Atlantic salmon (Salmo salar), an in vivo experiment was conducted (7 weeks in freshwater and 6 weeks in seawater) using 0.1 % LAN4 or LAN6 in diets for vaccinated fish. Coincidentally, a natural outbreak of Moritella viscosa (a bacterial fish pathogen) was reported at week 5 in seawater. Thus, the current study focus incorporated the disease-inflicted modulation of intestinal proteome and microbiota composition, which was estimated through metaproteomics and 16S rRNA sequencing, respectively. Results showed a detection of 1170 amplicon sequence variants (ASVs) belonging to 52 genera (modulated among dietary groups). Moreover, a positive correlation between LAN4 and control group (Ctr) was detected based on ASVs analysis. Regarding metaproteomics data and enrichment analysis (using KEGG or GO databases), LAN4 group showed a higher abundance of proteins linked to 48 functional terms such as amino acid biosynthesis and metabolism, immune homeostasis and cellular response to oxidative stress. On contrary, the proteins detected in LAN6 were linked with 14 terms (e.g., ferroptosis, arachidonic acid metabolism and regulation of cell projection assembly) that can be related to the inflammatory process. These results suggest the potential of D. hansenii yeasts as a paraprobiotics for the intestinal proteome and microbiota structure of Atlantic salmon. Therefore, D. hansenii is a promising feed additive for aquaculture-related species during the production cycle.
饲料添加剂是在养殖条件下改善鱼类生产性能和健康(不影响生长)的一种替代方法。为了确定两种水解的汉氏德巴酵母(LAN4和LAN6)对大西洋鲑鱼(Salmo salar)幼鱼肠道的生理影响,在淡水和海水中分别添加0.1%的LAN4或LAN6,进行了7周和6周的体内实验。巧合的是,第5周在海水中报告了粘森氏菌(一种鱼类细菌病原体)的自然暴发。因此,目前的研究重点包括肠道蛋白质组和微生物群组成的疾病介导调节,分别通过宏蛋白质组学和16S rRNA测序进行估计。结果显示,共检测到52属的扩增子序列变异(asv) 1170个。此外,通过asv分析发现LAN4与对照组(Ctr)呈正相关。关于宏蛋白质组学数据和富集分析(使用KEGG或GO数据库),LAN4组显示出与48个功能术语相关的蛋白质丰度更高,如氨基酸生物合成和代谢、免疫稳态和细胞对氧化应激的反应。相反,LAN6中检测到的蛋白质与14个可能与炎症过程相关的术语(例如,铁下垂,花生四烯酸代谢和细胞投射组装的调节)有关。这些结果表明,汉氏酵母有潜力作为大西洋鲑鱼肠道蛋白质组和微生物群结构的副益生菌。因此,在生产周期中,汉氏菌是一种很有前途的水产养殖相关物种的饲料添加剂。
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引用次数: 0
Genome-wide identification, characterization, molecular evolution and expression profiling analysis of COMMD gene family in black rockfish (Sebastes schlegelii) 黑岩鱼comd基因家族的全基因组鉴定、表征、分子进化及表达谱分析
IF 2.2 2区 生物学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2026-03-01 Epub Date: 2025-11-15 DOI: 10.1016/j.cbd.2025.101694
Xuechen Li , Zhentao Chen , Jingrun Pu, Xuangang Wang, Ze Tao, Zhixiang Duan, Gan Yu, Ping Han, Fan Zhang, Haiyang Yu
The Copper Metabolism gene MURR1 Domain (COMMD) gene family is recognized as a highly conserved gene family in diverse species and involved in various important biological processes, including copper metabolism, NF-κB signaling and membrane transport. However, current research regarding the systematic identification of the COMMD gene family in teleosts and its role in the innate immunity of Sebastes schlegelii (S. schlegelii) remains limited. In this study, we identified and annotated 9 COMMD genes in S. schlegelii. Through phylogenetic analysis, analysis of gene structure, motif compositions, and molecular evolutionary patterns of the COMMD gene family, we found that COMMD gene maintains a highly conserved state in evolutionary process, and bears similar importance in metabolism of different species. Moreover, we analyzed the expression patterns of COMMD genes in macrophage and immune-relevant tissues of healthy S. schlegelii and those infected with Acinetobacter johnsonii by using qRT-PCR. The results revealed distinct tissue-specific expression profiles for COMMD genes, and their expression was significantly altered after A. johnsonii infection. We confirmed that SsCOMMD1 could up-regulate the activity of NF-κB pathway. This study elaborates COMMD genes of S. schlegelii, providing a valuable reference for future research on understanding of the functions of COMMD gene family in the innate immune response of teleosts.
铜代谢基因MURR1结构域(COMMD)基因家族是广泛存在于多种物种中的高度保守的基因家族,参与铜代谢、NF-κB信号传导、膜转运等多种重要的生物过程。然而,目前关于硬骨鱼COMMD基因家族的系统鉴定及其在schlegelii (S. schlegelii)先天免疫中的作用的研究仍然有限。在这项研究中,我们鉴定并注释了9个schlegeli的COMMD基因。通过系统发育分析,分析COMMD基因家族的基因结构、基序组成和分子进化模式,我们发现COMMD基因在进化过程中保持高度保守状态,在不同物种的代谢中具有相似的重要性。此外,我们还利用qRT-PCR分析了健康schlegeli链球菌和感染johnsoni不动杆菌的巨噬细胞和免疫相关组织中COMMD基因的表达模式。结果显示,comd基因具有明显的组织特异性表达谱,且其表达在约翰氏单胞杆菌感染后显著改变。我们证实SsCOMMD1可以上调NF-κB通路的活性。本研究详细阐述了schlegelii的COMMD基因,为进一步研究COMMD基因家族在硬骨鱼先天免疫应答中的功能提供了有价值的参考。
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Comparative Biochemistry and Physiology D-Genomics & Proteomics
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