graft

移植物
  • 文章类型: Journal Article
    最普遍类型的血液透析膜是聚砜(PSf)。然而,由于生物相容性不足,它大大损害了患者透析的安全性。在这项研究中,我们用2,4-二羟基二苯甲酮(DBPh)基团修饰PSf膜的表面,以在紫外线照射期间充当锚定位点。随后,将定制的磺化二羟丙基壳聚糖(SDHPCS)接枝到改性PSf膜上,以补偿亲水性添加剂的不足。改性的PSf膜具有优异的亲水性和稳定性,正如其表征和评估所证明的那样。本文主要研究血小板膜形成之间的相互作用,蛋白质吸附,和抗凝血活性。结果表明,改性后的PSf膜表面亲水性显著增强,导致蛋白质和血小板吸附以及粘附的显着减少。
    The most prevalent type of hemodialysis membrane is polysulfone (PSf). However, due to inadequate biocompatibility, it significantly compromises the safety of dialysis for patients. In this study, we modify the surface of the PSf membrane with 2,4-dihydroxybenzophenone (DBPh) groups to serve as anchoring sites during UV irradiation. Subsequently, a tailored sulfonated dihydroxy propyl chitosan (SDHPCS) is grafted onto the modified PSf membrane to compensate for the deficiencies in hydrophilic additives. The modified PSf membrane exhibits outstanding hydrophilicity and stability, as demonstrated by its characterization and evaluation. This paper focuses on investigating the interaction between platelet membrane formation, protein adsorption, and anticoagulant activity. The results show that the modified PSf membrane exhibits remarkable enhancement in surface hydrophilicity, leading to a significant reduction in protein and platelet adsorption as well as adhesion.
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  • 文章类型: Journal Article
    磁共振成像(MRI)上的移植物成熟度与前交叉韧带(ACL)重建后恢复运动(RTS)之间的关系尚不清楚。
    比较ACL重建后进行RTS和未进行RTS(NRTS)的患者之间的信噪比(SNQ)值和ACL移植物T2*(梯度回波)值,并评估ACL重建后RTS的T2*映射的预测值。
    病例对照研究;证据水平,3.
    在关节镜下使用自体绳肌腱移植进行单束ACL重建后至少9个月,82例患者接受了RTS评估以及MRI评估。根据评估结果将患者分为RTS(n=53)和NRTS(n=29)组。近端中的SNQ值,中间,在MRI上测量移植物的远端区域和移植物的T2*值。使用Spearman相关分析评估T2*值与RTS之间的相关性。构建了接收器工作特性曲线以比较诊断性能,并根据最大Youden指数确定检测RTS的最佳T2*截止值。
    ACL重建后9个月,近端,中间,RTS组的SNQ值和平均SNQ值显着低于NRTS组(近端:17.15±4.85vs19.55±5.05,P=.038;中间:13.45±5.15vs.17.75±5.75,P=.001;平均值:12.37±2.74vs15.07±3.32,P<.001)。RTS组的T2*值较低(14.92±2.28vs17.69±2.48;P<.001),并且与RTS相关(r=-0.41;P=.02)。T2*曲线下面积为0.79(95%CI,0.75-0.83),T2*的最佳临界值为16.65,预测RTS失败的敏感性和特异性分别为67.9%和88.2%,分别。
    研究结果表明,SNQ(平均值,近端,和中)和RTS组移植物的T2*值显着低于NRTS组。计算的T2*值为16.65,以预测未能通过RTS测试的患者,其敏感性为67.9%,特异性为88.2%。
    UNASSIGNED: The relationship between graft maturity on magnetic resonance imaging (MRI) and return to sports (RTS) after anterior cruciate ligament (ACL) reconstruction is unclear.
    UNASSIGNED: To compare signal-to-noise quotient (SNQ) values and ACL graft T2* (gradient echo) values between patients who did RTS and those who did not RTS (NRTS) after ACL reconstruction and to evaluate the predictive value of T2* mapping for RTS after ACL reconstruction.
    UNASSIGNED: Case-control study; Level of evidence, 3.
    UNASSIGNED: At a minimum of 9 months after arthroscopic single-bundle ACL reconstruction with autologous hamstring tendon graft, 82 patients underwent RTS assessment as well as MRI evaluation. The patients were classified into RTS (n = 53) and NRTS (n = 29) groups based on the results of the assessment. The SNQ values in the proximal, middle, and distal regions of the graft and the T2* values of the graft were measured on MRI. The correlation between T2* values and RTS was assessed using Spearman correlation analysis. Receiver operating characteristic curves were constructed to compare the diagnostic performance, and the optimal T2* cutoff value for detecting RTS was determined based on the maximum Youden index.
    UNASSIGNED: At 9 months after ACL reconstruction, the proximal, middle, and mean SNQ values in the RTS group were significantly lower than those in the NRTS group (proximal: 17.15 ± 4.85 vs 19.55 ± 5.05, P = .038; middle: 13.45 ± 5.15 vs. 17.75 ± 5.75, P = .001; mean: 12.37 ± 2.74 vs 15.07 ± 3.32, P < .001). The T2* values were lower in the RTS group (14.92 ± 2.28 vs 17.69 ± 2.48; P < .001) and were correlated with RTS (r = -0.41; P = .02). The area under the curve of T2* was 0.79 (95% CI, 0.75-0.83), and the optimal cutoff value for T2* was 16.65, with a sensitivity and specificity for predicting failure to RTS of 67.9% and 88.2%, respectively.
    UNASSIGNED: Study findings indicated that the SNQs (mean, proximal, and middle) and the T2* values of the graft in the RTS group were significantly lower than those in NRTS group. A T2* value of 16.65 was calculated to predict patients who failed RTS tests with a sensitivity of 67.9% and specificity of 88.2%.
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  • 文章类型: Journal Article
    本文介绍了神经营养性角膜病变(NK),由于各种原因导致的三叉神经功能障碍,导致角膜神经支配。角膜神经化(CN)的手术技术已经发展起来,旨在恢复角膜敏感性。最初于1972年提出,现代方法提供了较少侵入性的选择。CN可以通过直接方法(DCN)直接将敏感神经缝合到受影响的角膜或通过神经自动/同种异体移植间接(ICN)进行。手术的成功依赖于细致的供体神经选择和准备,通常涉及多学科团队。PubMed研究和相关文献的审查进行了关于手术入路,强调手术技术和供体神经的选择。后者考虑了诸如感觉完整性和与角膜的接近度等因素。最常用的是对侧或同侧滑车上(STN),眶上(SON)和耳大(GAN)神经。关于移植物的选择,文献中使用最多的是sural(SN),前臂外侧皮神经(LABCN),还有GAN的神经.另一个有希望的选择是同种异体移植物(来自尸体的无细胞化神经)。感觉恢复的意义及影响手术结局的因素,包括神经口径匹配和轴突再生,正在讨论。未来的方向强调侵入性较小的技术和无细胞神经同种异体移植物的潜力。总之,CN代表了治疗NK的有希望的途径,根据患者病史和外科专业知识提供量身定制的方法,新的新兴技术需要通过基础科学改进和临床试验进一步探索。
    The article introduces neurotrophic keratopathy (NK), a condition resulting from corneal denervation due to various causes of trigeminal nerve dysfunctions. Surgical techniques for corneal neurotization (CN) have evolved, aiming to restore corneal sensitivity. Initially proposed in 1972, modern approaches offer less invasive options. CN can be performed through a direct approach (DCN) directly suturing a sensitive nerve to the affected cornea or indirectly (ICN) through a nerve auto/allograft. Surgical success relies on meticulous donor nerve selection and preparation, often involving multidisciplinary teams. A PubMed research and review of the relevant literature was conducted regarding the surgical approach, emphasizing surgical techniques and the choice of the donor nerve. The latter considers factors like sensory integrity and proximity to the cornea. The most used are the contralateral or ipsilateral supratrochlear (STN), and the supraorbital (SON) and great auricular (GAN) nerves. Regarding the choice of grafts, the most used in the literature are the sural (SN), the lateral antebrachial cutaneous nerve (LABCN), and the GAN nerves. Another promising option is represented by allografts (acellularized nerves from cadavers). The significance of sensory recovery and factors influencing surgical outcomes, including nerve caliber matching and axonal regeneration, are discussed. Future directions emphasize less invasive techniques and the potential of acellular nerve allografts. In conclusion, CN represents a promising avenue in the treatment of NK, offering tailored approaches based on patient history and surgical expertise, with new emerging techniques warranting further exploration through basic science refinements and clinical trials.
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  • 文章类型: Journal Article
    疫霉疫病严重威胁全球辣椒生产。嫁接支持植物抗病性,但潜在的分子机制仍不清楚。在这项研究中,我们使用抗辣椒菌株“ZCM334”和易感菌株“早期Calwonder”进行嫁接。与自根\'早期Calwonder\'植物相比,\'ZCM334\'移植物表现出延迟的疾病发作,电阻升高,减少叶细胞损伤,展示了嫁接在增强辣椒对辣椒的抗性方面的潜力。通过iTRAQ技术进行的蛋白质组学分析揭示了叶片和根中478和349种差异表达的蛋白质(DEP),分别,在移植物和自根植物之间。这些DEP与新陈代谢和细胞过程有关,刺激反应,和催化活性,并显著富集在次级代谢产物的生物合成中,光合组织中的碳固定,和丙酮酸代谢途径。12个DEP在叶和根表现出一致的表达趋势,包括七个与辣椒芽孢杆菌抗性有关的,被筛选。qRT-PCR分析证实了在接种辣椒后DEP的蛋白质和转录物水平之间的显著相关性。这项研究强调了嫁接增强辣椒对疫霉病的抗性的分子机制。关键基因的鉴定为研究辣椒对辣椒的抗性调控网络奠定了基础。
    Phytophthora blight severely threatens global pepper production. Grafting bolsters plant disease resistance, but the underlying molecular mechanisms remain unclear. In this study, we used P. capsici-resistant strain \'ZCM334\' and susceptible strain \'Early Calwonder\' for grafting. Compared to self-rooted \'Early Calwonder\' plants, \'ZCM334\' grafts exhibited delayed disease onset, elevated resistance, and reduced leaf cell damage, showcasing the potential of grafting in enhancing pepper resistance to P. capsici. Proteomic analysis via the iTRAQ technology unveiled 478 and 349 differentially expressed proteins (DEPs) in the leaves and roots, respectively, between the grafts and self-rooted plants. These DEPs were linked to metabolism and cellular processes, stimulus responses, and catalytic activity and were significantly enriched in the biosynthesis of secondary metabolites, carbon fixation in photosynthetic organizations, and pyruvate metabolism pathways. Twelve DEPs exhibiting consistent expression trends in both leaves and roots, including seven related to P. capsici resistance, were screened. qRT-PCR analysis confirmed a significant correlation between the protein and transcript levels of DEPs after P. capsici inoculation. This study highlights the molecular mechanisms whereby grafting enhances pepper resistance to Phytophthora blight. Identification of key genes provides a foundation for studying the regulatory network governing the resistance of pepper to P. capsici.
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  • 文章类型: Journal Article
    与单独的SB-ACLR相比,单束前交叉韧带重建(SB-ACLR)与前外侧韧带重建(ALLR)具有更好的临床效果。然而,目前尚不清楚预后的改善是否是伴随ALLR对ACL移植物愈合影响的结果.
    这项研究的目的是确定伴随的ALLR是否与SB-ACLR后的移植物韧带化改善有关。假设ALLR不会影响移植物愈合。
    队列研究;证据水平,3.
    在2007年至2019年期间,对连续的732名患者进行了1至1匹配研究,这些患者在接受ACLR时使用了绳肌腱自体移植物。如果患者骨骼不成熟,将被排除在外,炎症性关节病,多韧带重建(ALLR除外),或移植物破裂。伴随SB-ACLR和ALLR(SB-ACLR/ALLR)和孤立的SB-ACLR患者根据年龄1-1匹配。性别,麻醉下检查(EUA)3级枢轴移位,EUA3级前抽屉测试,移植物撞击的存在,矢状移植物角度,骨骼成熟度,缺乏全身韧带松弛,和多处韧带损伤。共有40对配对的患者在手术后第二年内接受了术后磁共振成像(MRI),以评估移植物韧带化,通过ACL移植物的信噪比(SNQ)测量。
    平均随访时间为41个月,SB-ACLR/ALLR组的2年随访率为80%,孤立的SB-ACLR组为98%。索引手术和MRI之间的平均持续时间为16.4±3.4个月。SB-ACLR/ALLR和SB-ACLR组之间的ACL移植物SNQ没有显着差异(分别为6.9±4.6和5.2±4.8;P=.066)。
    研究结果表明,如通过ACL移植物的SNQ评估,自体肌腱移植时伴随的ALLR不影响移植物愈合。
    UNASSIGNED: Single-bundle anterior cruciate ligament reconstruction (SB-ACLR) with concomitant anterolateral ligament reconstruction (ALLR) has been associated with better clinical results when compared with isolated SB-ACLR. However, it is not known whether the improved outcomes are the result of the influence of concomitant ALLR on ACL graft healing.
    UNASSIGNED: The purpose of this study was to determine whether concomitant ALLR is associated with improved graft ligamentization after SB-ACLR. It was hypothesized that ALLR would not affect graft healing.
    UNASSIGNED: Cohort study; Level of evidence, 3.
    UNASSIGNED: A 1 to 1 matching study was conducted on a consecutive series of 732 patients who underwent ACLR using a hamstring tendon autograft between 2007 and 2019. Patients were excluded if they had skeletal immaturity, inflammatory joint disease, multiple ligament reconstruction (other than ALLR), or a graft rupture. Patients with concomitant SB-ACLR and ALLR (SB-ACLR/ALLR) and isolated SB-ACLR were matched 1 to 1 based on age, sex, examination under anesthesia (EUA) grade 3 pivot shift, EUA grade 3 anterior drawer test, presence of graft impingement, sagittal graft angle, skeletal maturity, lack of generalized ligamentous laxity, and multiple ligamentous injury. A total of 40 matched pairs underwent postoperative magnetic resonance imaging (MRI) within the second year after surgery to assess graft ligamentization, which was measured by the signal-to-noise quotient (SNQ) of the ACL graft.
    UNASSIGNED: The mean follow-up period was 41 months, with a 2-year follow-up rate of 80% in the SB-ACLR/ALLR group and 98% in the isolated SB-ACLR group. The mean duration between the index operation and MRI was 16.4 ± 3.4 months. No significant difference was observed in the SNQ of the ACL graft between the SB-ACLR/ALLR and SB-ACLR groups (6.9 ± 4.6 vs 5.2 ± 4.8, respectively; P = .066).
    UNASSIGNED: Study findings indicated that a concomitant ALLR at the time of hamstring tendon autograft ACLR did not affect graft healing as assessed by the SNQ of the ACL graft.
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  • 文章类型: Journal Article
    本研究调查了基于抗胸腺细胞球蛋白(ATG)的清髓性单倍体相合造血干细胞移植(haplo-HSCT)的外周血移植物的细胞组成。
    在2016年1月至2020年2月期间,在基于ATG的清髓性单倍体HSCT的训练队列中对临床特征进行了回顾性评估,并在2020年3月至2021年6月期间的验证队列中进行了确认。
    较高剂量的移植物CD8+T细胞(≥0.85×108kg-1)可显著提高总生存率(OS;风险比[HR],1.750;P=0.002)和无病生存率(DFS;HR,1.751;P<0.001)在训练队列中,根据多变量Cox回归分析。较高剂量的单核细胞(MNCs)表现出更好的OS(HR,1.517;P=0.038)和DFS(HR,1.532;P=0.027)。患者年龄较大(>46岁),年龄较大(≥50岁)和较高的精细疾病风险指数(rDRI)也与OS相关.基于移植物CD8+T细胞剂量的移植物CD8+T细胞风险系统,在LASSOCox回归分析后,使用列线图模型构建供者年龄和rDRI.它显示出可接受的歧视,C指数分别为0.62和0.63。移植物CD8+T细胞剂量与供体年龄呈负相关(P<0.001),与动员前外周血淋巴细胞百分比较高呈正相关(P<0.001)。
    外周血来源的移植物中更高的CD8+T细胞剂量可改善基于ATG的清髓性单plo-HSCT患者的生存率。淋巴细胞百分比较高的年轻供体改善了具有中等rDRI风险的患者的生存率。
    UNASSIGNED: This study investigated the cellular composition of peripheral blood grafts for anti-thymocyte globulin (ATG)-based myeloablative haploidentical haematopoietic stem cell transplantation (haplo-HSCT).
    UNASSIGNED: Clinical characteristics were retrospectively evaluated in a training cohort with ATG-based myeloablative haplo-HSCT between January 2016 and February 2020 and confirmed in a validation cohort between March 2020 and June 2021.
    UNASSIGNED: A higher dose of graft CD8+ T cells (≥ 0.85 × 108 kg-1) was significantly improved overall survival (OS; hazard ratio [HR], 1.750; P = 0.002) and disease-free survival (DFS; HR, 1.751; P < 0.001) in the training cohort, according to multivariate Cox regression analysis. Higher doses of mononuclear cells (MNCs) demonstrated better OS (HR, 1.517; P = 0.038) and DFS (HR, 1.532; P = 0.027). Older patient age (> 46 years), older donor age (≥ 50 years) and a higher refined disease risk index (rDRI) were also related to OS. A graft CD8+ T-cell risk system based on graft CD8+ T-cell dose, donor age and rDRI was constructed using a nomogram model after LASSO Cox regression analysis. It showed acceptable discrimination, with a C-index of 0.62 and 0.63, respectively. Graft CD8+ T-cell dose was negatively correlated with donor age (P < 0.001) and positively correlated with a higher lymphocyte percentage in the peripheral blood before mobilisation (P < 0.001).
    UNASSIGNED: A higher CD8+ T-cell dose in peripheral blood-derived grafts improves patients\' survival with ATG-based myeloablative haplo-HSCT. Younger donors with higher lymphocyte percentages improved patients\' survival with an intermediate rDRI risk.
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  • 文章类型: Journal Article
    探讨人工真皮联合自体厚皮移植治疗手部热压迫伤的临床效果。
    将2016年1月至2022年10月在我院接受热压缩伤口治疗的42例患者分为两组。自体皮移植后7天的成活率,操作的数量,总住院时间,住院总费用,并记录分泌物的细菌培养结果。视觉模拟量表用于评估伤口疼痛。记录皮肤移植物破裂的情况,并通过温哥华疤痕量表评估供体部位的疤痕状态。
    它显示了人造真皮的组合,厚薄皮肤自体移植,负压封闭引流技术通过提高植皮成活率(95.24%>66.67%),改善手部热压迫创面的治疗效果,减少操作次数(P<0.001),缓解伤口疼痛(P<0.001),有效控制伤口感染(4.76%<9.52%),术后植皮破裂率降低(4.8%<28.6%)。供者(P=0.003)和植皮区无明显瘢痕增生(P<0.001),手部功能恢复良好(P=0.037);这种治疗策略可延长住院时间(P=0.030),增加住院总费用(P=0.030).
    人工真皮和裂层皮肤的复合移植结合VSD显着改善了手部热压缩伤口患者的治疗和美学效果,值得在临床上推广应用。
    UNASSIGNED: To explore the clinical effect of artificial dermis combined with split-thickness skin autograft in treating hand thermal compression wounds.
    UNASSIGNED: Forty-two patients in our hospital from January 2016 to October 2022 with thermal compression wounds were divided into two groups. The survival rate of autologous skin grafts seven days after skin grafting, the number of operations, total hospital stay, total hospitalization cost, and bacterial culture results of secretions were recorded. The visual analog scale was used to evaluate the wound pain. The condition of skin graft rupture was recorded and the scar status of the donor site was evaluated by the Vancouver Scar Scale.
    UNASSIGNED: It showed combination of artificial dermis, split-thickness skin autograft, and vacuum sealing drainage improves the treatment of hand thermal compression wounds by enhancing the survival rate of skin grafting (95.24% > 66.67%), reducing the number of operations (P < 0.001), relieving wound pain (P < 0.001), effectively controlling wound infection (4.76% < 9.52%), and reducing the skin graft rupture rate after surgery (4.8% < 28.6%). There was no evident scar hyperplasia in the donor (P = 0.003) and skin graft areas (P < 0.001), which had a good recovery of hand function (P = 0.037); however, this treatment strategy may prolong the hospital stay (P = 0.030) and increase the total hospitalization cost (P = 0.030).
    UNASSIGNED: The composite transplantation of artificial dermis and split-thickness skin combined with the VSD significantly improves treatment and aesthetic outcomes in patients with thermal compression wounds to the hand, which is worth promoting and applying in clinical practice.
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  • 文章类型: Randomized Controlled Trial
    目的:本研究的目的是比较使用和不使用抗生素软膏治疗慢性穿孔后的移植结果和术后感染。
    方法:随机对照试验。
    方法:将135例慢性穿孔随机分配到使用抗生素软膏组(UAO,n=68)或不使用抗生素软膏组(NAO,鼓膜成形术后n=67)。比较两组患者术后6个月的移植效果及术后感染情况。
    结果:术后6个月,移植物感染率UAO组为4.4%,NAO组为10.4%,差异无统计学意义(P=0.312)。UAO组和NAO组移植成功率分别为92.6%和91.0%,差异无统计学意义(P=0.979)。在UAO组,3例化脓性耳分泌物患者尽管接受了氧氟沙星滴耳液和静脉抗生素治疗,但仍残留穿孔。在NAO组,6例化脓性耳分泌物导致残余穿孔,只有一个,轻度化脓性出院成功治疗和关闭。此外,术前(P=0.746)或术后(P=0.521)空骨间隙(ABG)值或平均ABG增益(P=0.745)均无显著组间差异.然而,在UAO组中有3例(4.4%)患者和在NAO组中有5例(7.5%)患者注意到颗粒性心肌炎,湿度最小但没有感染,差异无统计学意义(P=0.699)。
    结论:在鼓膜成形术后使用和不使用抗生素软膏用于移植物侧方填塞两种方法对术后感染和移植物结局具有可比性。
    OBJECTIVE: The objective of this study was to compare the graft outcome and postoperative infection of with and without the use of antibiotic ointment following myringoplasty for the treatment of chronic perforations.
    METHODS: Randomized controlled trial.
    METHODS: 135 chronic perforations were prospectively randomized to use of antibiotic ointment group (UAO, n = 68) or no use of antibiotic ointment group (NAO, n = 67) following myringoplasty. The graft outcomes and postoperative infection were compared among two groups at 6 months.
    RESULTS: At postoperative 6 months, the graft infection rate was 4.4% in the UAO group and 10.4% in the NAO group, the difference was not significant (P = 0.312).The graft success rates were 92.6% in the UAO group and 91.0% in the NAO group, the difference was not significant (P = 0.979). In the UAO group, 3 patients with purulence ear discharge resulted in a residual perforation although they received ofloxacin ear drops and intravenous antibiotic therapy treatment. In the NAO group, 6 patients with purulence ear discharge resulted in a residual perforation, only one, with mild purulence discharge was successfully treated and closed. In addition, no significant between-group differences were observed pre- (P = 0.746) or post- (P = 0.521) operative air bone gap (ABG) values or mean ABG gain (P = 0.745). However, granular myringitis with minimal moistness but without infection has been noted in 3 (4.4%) patients in the UAO group and in 5 (7.5%) in the NAO group, the difference was not significant (P = 0.699).
    CONCLUSIONS: Use and non-use of antibiotic ointments for lateral packing of graft are both comparable methods following myringoplasty for postoperative infection and graft outcomes.
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  • 文章类型: Journal Article
    枯萎病是由镰刀菌引起的土传病害,已成为冬瓜生产的严重威胁。抗病嫁接冬瓜是治疗枯萎病的有效方法。然而,关于嫁接冬瓜对枯萎病的防御机制的报道很少。
    在本研究中,比较了镰刀菌感染后嫁接和原始冬瓜的疾病和生长指标。在嫁接的冬瓜中观察到高水平的抗病性,疾病指数较低,感染后对生长的影响较低。进行RNA-seq以鉴定嫁接和原始冬瓜中相邻处理时间点之间的差异表达基因(DEG),分别。然后进行了比较时间分析,鉴定出总共1190个基因,在镰刀菌感染过程中,两个冬瓜组之间显示出不同的基因表达模式。
    这里,在嫁接的冬瓜中观察到高水平的抗病性,疾病指数较低,感染后对生长的影响较低。嫁接组的DEG数高于原始组,两组之间DEGs的丰富功能类别和途径在很大程度上不一致。这些基因富含多种途径,其中丝裂原活化蛋白激酶(MAPK)信号通路增强了早期防御反应,还有角质,suberin,与原始组相比,嫁接冬瓜的表面抗性和蜡生物合成信号通路增强。我们的研究提供了有关嫁接冬瓜对枯萎病感染的抗性的基因调控机制的见解,这将有利于抗枯萎病砧木的育种和生产。
    UNASSIGNED: Wilt is a soil-borne disease caused by Fusarium that has become a serious threat to wax gourd production. Disease-resistant graft wax gourds are an effective treatment for Fusarium wilt. However, there are few reports on the defense mechanism of graft wax gourd against wilt diseases.
    UNASSIGNED: In the present study, disease and growth indices were compared between grafted and original wax gourds after infection with Fusarium. High level of disease resistance was observed in the grafted wax gourd, with a lower disease index and low impacts on growth after infection. RNA-seq was performed to identify the differentially expressed genes (DEGs) between the adjacent treatment time points in the grafted and original wax gourds, respectively. Then a comparative temporal analysis was performed and a total of 1,190 genes were identified to show different gene expression patterns between the two wax gourd groups during Fusarium infection.
    UNASSIGNED: Here, high level of disease resistance was observed in the grafted wax gourd, with a lower disease index and low impacts on growth after infection. The DEG number was higher in grafted group than original group, and the enriched functional categories and pathways of DEGs were largely inconsistent between the two groups. These genes were enriched in multiple pathways, of which the mitogen-activated protein kinase (MAPK) signaling pathway enhanced the early defense response, and cutin, suberin, and wax biosynthesis signaling pathways enhanced surface resistance in grafted wax gourd in comparison to original group. Our study provides insights into the gene regulatory mechanisms underlying the resistance of grafted wax gourds to Fusarium wilt infection, which will facilitate the breeding and production of wilt-resistant rootstocks.
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  • 文章类型: Journal Article
    嫁接广泛用于增强番茄的表型性状,缓解生物和非生物胁迫,控制温室生产中接穗的土传病害。影响嫁接后幼苗的愈合和适应阶段的因素很多。然而,光的作用很少被研究。在这项研究中,我们比较了人造光和传统阴影(在阴影的塑料覆盖隧道下)对嫁接番茄幼苗恢复的影响。结果表明,利用人工光照恢复的番茄嫁接苗具有较高的健康指数,叶片叶绿素含量,芽干重,与传统遮光法恢复的嫁接苗相比,净光合速率(Pn)和水分利用效率(WUE)。转录组分析表明,使用人工光恢复的嫁接苗的差异表达基因(DEGs)主要富集在与植物激素信号转导相对应的途径中。此外,我们测量了嫁接番茄幼苗的内源激素含量。结果表明,水杨酸(SA)和激动素(Kin)的含量显着增加,与遮光处理相比,人工光恢复嫁接苗的吲哚乙酸(IAA)和茉莉酸(JA)含量降低。因此,我们认为人工光影响嫁接苗的形态发生和光合效率,通过调节内源激素水平提高嫁接恢复过程中番茄幼苗的性能。
    Grafting is widely used to enhance the phenotypic traits of tomatoes, alleviate biotic and abiotic stresses, and control soil-borne diseases of the scion in greenhouse production. There are many factors that affect the healing and acclimatization stages of seedlings after grafting. However, the role of light has rarely been studied. In this study, we compared the effects of artificial light and traditional shading (under shaded plastic-covered tunnels) on the recovery of grafted tomato seedlings. The results show that the grafted tomato seedlings recovered using artificial light had a higher healthy index, leaf chlorophyll content, shoot dry weight, and net photosynthetic rate (Pn) and water use efficiency (WUE) compared with grafted seedling recovered using the traditional shading method. Transcriptome analysis showed that the differentially expressed genes (DEGs) of grafted seedlings restored using artificial light were mainly enriched in the pathways corresponding to plant hormone signal transduction. In addition, we measured the endogenous hormone content of grafted tomato seedlings. The results show that the contents of salicylic acid (SA) and kinetin (Kin) were significantly increased, and the contents of indoleacetic acid (IAA) and jasmonic acid (JA) were decreased in artificial-light-restored grafted tomato seedlings compared with those under shading treatments. Therefore, we suggest that artificial light affects the morphogenesis and photosynthetic efficiency of grafted tomato seedlings, and it can improve the performance of tomato seedlings during grafting recovery by regulating endogenous hormone levels.
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