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1.
Mol Breed ; 44(5): 37, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38745883

RESUMEN

Apyrase is a class of enzyme that catalyzes the hydrolysis of nucleoside triphosphates/diphosphates (NTP/NDP), which widely involved in regulation of plant growth and stress responses. However, apyrase family genes in maize have not been identified, and their characteristics and functions are largely unknown. In this study, we identified 16 apyrases (named as ZmAPY1-ZmAPY16) in maize genome, and analyzed their phylogenetic relationships, gene structures, chromosomal distribution, upstream regulatory transcription factors and expression patterns. Analysis of the transcriptome database unveiled tissue-specific and abiotic stress-responsive expression of ZmAPY genes in maize. qPCR analysis further confirmed their responsiveness to drought, heat, and cold stresses. Association analyses indicated that variations of ZmAPY5 and ZmAPY16 may regulate maize agronomic traits and drought responses. Our findings shed light on the molecular characteristics and evolutionary history of maize apyrase genes, highlighting their roles in various biological processes and stress responses. This study forms a basis for further exploration of apyrase functions in maize. Supplementary Information: The online version contains supplementary material available at 10.1007/s11032-024-01474-9.

2.
Appl Opt ; 63(8): 2030-2035, 2024 Mar 10.
Artículo en Inglés | MEDLINE | ID: mdl-38568644

RESUMEN

Multimode power splitters are the fundamental building blocks in mode division multiplexing systems. In this paper, we propose a low-loss and compact, dual-mode, 3-dB power splitter for the two lowest TE modes combining three different structures, including a directional coupler, a multimode interferometer, and a Y-junction. The coupling length of the proposed device is only 7.2 µm. For both T E 0 and T E 1 modes, the numerical simulation shows that the insertion loss is only less than 0.1 dB and crosstalk is less than -20d B at the wavelength range of 1520-1580 nm. The working bandwidth can cover the entire C-band. It offers a potential solution for a 3-dB power splitter of the two lowest TE modes.

3.
BMC Plant Biol ; 24(1): 338, 2024 Apr 25.
Artículo en Inglés | MEDLINE | ID: mdl-38664642

RESUMEN

Proper pericarp thickness protects the maize kernel against pests and diseases, moreover, thinner pericarp improves the eating quality in fresh corn. In this study, we aimed to investigate the dynamic changes in maize pericarp during kernel development and identified the major quantitative trait loci (QTLs) for maize pericarp thickness. It was observed that maize pericarp thickness first increased and then decreased. During the growth and formation stages, the pericarp thickness gradually increased and reached the maximum, after which it gradually decreased and reached the minimum during maturity. To identify the QTLs for pericarp thickness, a BC4F4 population was constructed using maize inbred lines B73 (recurrent parent with thick pericarp) and Baimaya (donor parent with thin pericarp). In addition, a high-density genetic map was constructed using maize 10 K SNP microarray. A total of 17 QTLs related to pericarp thickness were identified in combination with the phenotypic data. The results revealed that the heritability of the thickness of upper germinal side of pericarp (UG) was 0.63. The major QTL controlling UG was qPT1-1, which was located on chromosome 1 (212,215,145-212,948,882). The heritability of the thickness of upper abgerminal side of pericarp (UA) was 0.70. The major QTL controlling UA was qPT2-1, which was located on chromosome 2 (2,550,197-14,732,993). In addition, a combination of functional annotation, DNA sequencing analysis and quantitative real-time PCR (qPCR) screened two candidate genes, Zm00001d001964 and Zm00001d002283, that could potentially control maize pericarp thickness. This study provides valuable insights into the improvement of maize pericarp thickness during breeding.


Asunto(s)
Mapeo Cromosómico , Sitios de Carácter Cuantitativo , Zea mays , Sitios de Carácter Cuantitativo/genética , Zea mays/genética , Zea mays/anatomía & histología , Zea mays/crecimiento & desarrollo , Semillas/genética , Semillas/crecimiento & desarrollo , Semillas/anatomía & histología , Fenotipo , Cromosomas de las Plantas/genética , Polimorfismo de Nucleótido Simple
4.
Int J Surg Case Rep ; 116: 109387, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38367418

RESUMEN

INTRODUCTION: Gas embolism is a rare but fatal clinical emergency. Hydrogen peroxide (H2O2) can cause gas embolism when improperly used in closed cavities or for deep and large wound irrigation. PRESENTATION OF CASE: A 31-year-old woman was diagnosed with lumbar-3 tuberculosis and paravertebral abscess and underwent emergency spinal surgery in a prone position. After removing the tuberculous pus, 200 mL of H2O2 (3 % v/w) was used to repeatedly irrigate the abscess cavity. Immediately after irrigation, the patient suffered cardiac arrest. During cardiopulmonary resuscitation, transesophageal echocardiography revealed that the right cardiac cavity was filled with a diffuse "Snowflake-Like" gas embolus, and cranial computed tomography showed a multi-point pneumocephalus in the frontal lobes. The patient eventually suffered brain death despite the return of spontaneous circulation after active resuscitation. DISCUSSION: H2O2 can quickly release abundant oxygen and water upon contact with catalase. Oxygen bubbles enter the vascular lumen and cause mechanical obstruction of the right cardiac circulation. In addition, H2O2 and oxygen bubbles may migrate upwards and enter the intracranial tissue through the epidural space or subdural space, resulting in intracranial pneumatosis. Diagnosis and treatment of gas embolism are extremely difficult. Some suggestions are that H2O2 should not be used in closed cavities or on deep and large wounds due to the potential risk of fatal gas embolism. CONCLUSION: The fatal complications of gas embolism and pneumocephalus rarely occur simultaneously in one patient, and we aim to highlight this potential risk of intraoperative H2O2 use in spinal surgery.

5.
J Exp Bot ; 75(1): 168-179, 2024 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-37798132

RESUMEN

Submergence is a major constraint on rice production in South and Southeast Asia. In this study, we determined that a gene of the Sub1A-binding protein family, SAB23, encodes a plant homeodomain (PHD)-type transcription factor that has a novel function of negatively regulating submergence tolerance in rice. The T-DNA insertion mutant sab23 displayed reduced plant height, delayed seed maturation, and lower percentage seed set. Importantly, this mutant also exhibited enhanced submergence tolerance. In addition, CRISPR/Cas9 knock out of SAB23 resulted in a significant reduction in the content of the gibberellin GA4 and a dramatic increase in the content of GA1 in the plants. SAB23 binds to the promoter of CYTOCHROME P450 714B2 (CYP714B2), which encodes a GA13-oxidase that catalyses the conversion of GA53 to GA19. Disruption of SAB23 function led to increased CYP714B2 transcription, and overexpression of CYP714B2 produced phenotypes similar to those of the SAB23-knockout plants. Taken together, our results reveal that SAB23 negatively regulates rice submergence tolerance by modulating CYP714B2 expression, which has significant potential for use in future breeding.


Asunto(s)
Oryza , Factores de Transcripción , Factores de Transcripción/genética , Factores de Transcripción/metabolismo , Oryza/metabolismo , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Fitomejoramiento , Sistema Enzimático del Citocromo P-450/metabolismo , Mutación
6.
Mol Ther ; 31(12): 3520-3530, 2023 Dec 06.
Artículo en Inglés | MEDLINE | ID: mdl-37915172

RESUMEN

Otoferlin (OTOF) gene mutations represent the primary cause of hearing impairment and deafness in auditory neuropathy. The c.2485C>T (p. Q829X) mutation variant is responsible for approximately 3% of recessive prelingual deafness cases within the Spanish population. Previous studies have used two recombinant AAV vectors to overexpress OTOF, albeit with limited efficacy. In this study, we introduce an enhanced mini-dCas13X RNA base editor (emxABE) delivered via an AAV9 variant, achieving nearly 100% transfection efficiency in inner hair cells. This approach is aimed at treating OTOFQ829X, resulting in an approximately 80% adenosine-to-inosine conversion efficiency in humanized OtofQ829X/Q829X mice. Following a single scala media injection of emxABE targeting OTOFQ829X (emxABE-T) administered during the postnatal day 0-3 period in OtofQ829X/Q829X mice, we observed OTOF expression restoration in nearly 100% of inner hair cells. Moreover, auditory function was significantly improved, reaching similar levels as in wild-type mice. This enhancement persisted for at least 7 months. We also investigated P5-P7 and P30 OtofQ829X/Q829X mice, achieving auditory function restoration through round window injection of emxABE-T. These findings not only highlight an effective therapeutic strategy for potentially addressing OTOFQ829X-induced hearing loss but also underscore emxABE as a versatile toolkit for treating other monogenic diseases characterized by premature termination codons.


Asunto(s)
Sordera , Pérdida Auditiva Central , Pérdida Auditiva , Animales , Ratones , Edición Génica , Pérdida Auditiva/genética , Pérdida Auditiva/terapia , Mutación
7.
Theriogenology ; 209: 141-150, 2023 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-37393744

RESUMEN

DNA binding inhibitory factor 3 (ID3) has been shown to have a key role in maintaining proliferation and differentiation. It has been suggested that ID3 may also affect mammalian ovarian function. However, the specific roles and mechanisms are unclear. In this study, the expression level of ID3 in cumulus cells (CCs) was inhibited by siRNA, and the downstream regulatory network of ID3 was uncovered by high-throughput sequencing. The effects of ID3 inhibition on mitochondrial function, progesterone synthesis, and oocyte maturation were further explored. The GO and KEGG analysis results showed that after ID3 inhibition, differentially expressed genes, including StAR, CYP11A1, and HSD3B1, were involved in cholesterol-related processes and progesterone-mediated oocyte maturation. Apoptosis in CC was increased, while the phosphorylation level of ERK1/2 was inhibited. During this process, mitochondrial dynamics and function were disrupted. In addition, the first polar body extrusion rate, ATP production and antioxidation capacity were reduced, which suggested that ID3 inhibition led to poor oocyte maturation and quality. The results will provide a new basis for understanding the biological roles of ID3 as well as cumulus cells.


Asunto(s)
Células del Cúmulo , Oocitos , Oogénesis , Progesterona , Animales , Bovinos , Femenino , Células del Cúmulo/metabolismo , Mamíferos , Mitocondrias , Oocitos/fisiología , Oogénesis/genética , Progesterona/farmacología , Progesterona/metabolismo , Proteínas Inhibidoras de la Diferenciación/metabolismo
8.
Nutrients ; 15(11)2023 May 23.
Artículo en Inglés | MEDLINE | ID: mdl-37299390

RESUMEN

Changes in the composition and ratio of the flora during colitis have been found to potentially affect ovarian function through nutrient absorption. However, the mechanisms have not been fully explored. To investigate whether colitis-induced dysbacteriosis of the intestinal flora affects ovarian function, mice were given dextran sodium sulfate (DSS) through drinking water. High-throughput sequencing technology was used to clarify the composition and proportion of bacterial flora as well as gene expression changes in the colon. Changes in follicle type, number, and hormone secretion in the ovary were detected. The results showed that 2.5% DSS could induce severe colitis symptoms, including increased inflammatory cell infiltration, severe damage to the crypt, and high expression of inflammatory factors. Moreover, vitamin A synthesis metabolism-related genes Rdh10, Aldh1a1, Cyp26a1, Cyp26b1, and Rarß were significantly decreased, as well as the levels of the steroid hormone synthase-related proteins STAR and CYP11A1. The levels of estradiol, progesterone, and Anti-Mullerian hormone as well as the quality of oocytes decreased significantly. The significantly changed abundances of Alistipes, Helicobacter, Bacteroides, and some other flora had potentially important roles. DSS-induced colitis and impaired vitamin A absorption reduced ovarian function.


Asunto(s)
Colitis , Microbioma Gastrointestinal , Femenino , Ratones , Animales , Vitamina A/metabolismo , Disbiosis/metabolismo , Colitis/metabolismo , Colon/metabolismo , Hormonas/metabolismo , Sulfato de Dextran/efectos adversos , Ratones Endogámicos C57BL , Modelos Animales de Enfermedad
10.
Sci Rep ; 13(1): 2848, 2023 02 17.
Artículo en Inglés | MEDLINE | ID: mdl-36801927

RESUMEN

Intraoperative ingestion of blood, cerebrospinal fluid, and irrigation fluid can lead to an increase in gastric volume, resulting in the potential risk of aspiration in patients after endoscopic endonasal transsphenoidal surgery (EETS). In this prospective observational study, we aimed to assess the volume of gastric contents in patients undergoing this neurosurgical procedure using ultrasound, and to determine the factors associated with volume change. Eighty-two patients diagnosed with pituitary adenoma were recruited consecutively. Semi-quantitative (Perlas scores: 0, 1 and 2) and quantitative (cross-sectional area, CSA) ultrasound assessments of the gastric antrum were performed immediately before and after surgery in the semi-recumbent and semi-recumbent right-lateral positions. Seven (8.5%) patients had antrum scores from preoperative grade 0 to postoperative grade 2; nine (11%) patients had antrum scores from preoperative grade 0 to postoperative grade 1. The mean ± standard deviation (SD) of increased gastric volume was 71.0 ± 33.1 mL and 236.5 ± 32.4 mL in postoperative grade 1 and 2 groups, respectively. Subgroup analysis showed that 11 (13.4%) patients (4 in grade 1 and all in grade 2) had postoperative estimated gastric volume > 1.5 mL kg-1 (mean ± SD 3.08 ± 1.67, range 1.51-5.01 mL kg-1). Logistic regression analysis revealed that older age, diabetes mellitus, and long surgical duration were independent risk factors for significant volume change (all P < 0.05). Our results showed a significant increase in gastric volume in some patients who underwent EETS. Bedside ultrasound measurements of gastric volume can be used to assess the postoperative aspiration risk, particularly in older diabetic patients with a longer surgical duration.


Asunto(s)
Antro Pilórico , Estómago , Humanos , Anciano , Estómago/diagnóstico por imagen , Estómago/cirugía , Ultrasonografía/métodos , Estudios Prospectivos , Endoscopía
11.
J Vasc Access ; 24(6): 1332-1339, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-35360984

RESUMEN

BACKGROUND: Inserting a J-tip guide-wire into a vein's lumen is often difficult when using the Seldinger or modified Seldinger technique for central venous catheterization (CVC) in newborns. This study was designed to compare the efficacy and safety of guide-wire insertion using the combination of a short peripheral intravenous cannula with a straight-tip guide-wire vs. a needle with a J-tip guide-wire for ultrasound-guided (USG) cannulation of the internal jugular vein (IJV) in newborns using an in-plane technique. METHODS: One hundred and thirty newborn patients (weight, 1.4-5.2 kg) scheduled for selective or emergency surgery, were randomly assigned to either the needle group (combined with a J-tip guide-wire) or cannula group (combined with a straight-tip guide-wire). The primary outcome was the rate of successful guide-wire insertion on the first attempt. The puncture attempts, catheter placement attempts, and mechanical complications were also compared between the groups. RESULTS: The rate of successful guide-wire insertion on the first attempt was higher in the cannula group (97%) than in the needle group (76%) (p < 0.05, χ2 = 11.233). Moreover, fewer insertion attempts were needed in the cannula group (1.0 ± 0.2) than in the needle group (1.7 ± 1.1) (p < 0.05, 95% CI [0.449, 1.028]). The time to successful guide-wire insertion was shorter in the cannula group (63 ± 32 s) than in the needle group (92±50 s) (p < 0.05, 95% CI [14.024, 43.063]). No differences were found about other catheterization parameters and complications between the groups. CONCLUSION: The short peripheral cannula combined with a straight-tip guide-wire was superior to the needle combined with a J-tip guide-wire for USG newborn IJV catheterization in terms of successful guide-wire insertion on the first attempt and overall number of insertion attempts.


Asunto(s)
Cateterismo Venoso Central , Humanos , Recién Nacido , Cateterismo Venoso Central/efectos adversos , Cateterismo Venoso Central/métodos , Cánula , Ultrasonografía , Venas Braquiocefálicas , Venas Yugulares/diagnóstico por imagen , Ultrasonografía Intervencional/métodos
12.
Opt Express ; 30(24): 43815-43825, 2022 Nov 21.
Artículo en Inglés | MEDLINE | ID: mdl-36523072

RESUMEN

In recent years, high-power, tunable terahertz (THZ) radiation sources have become the key areas of research in the world. The method of THZ waves by nonlinear optical difference frequency generation (DFG) has the advantages of wide tuning, high power, room temperature operation, and compact structure. However, the conversion efficiency of the current difference frequency method is low, which needs a trade-off between conversion efficiency and tuning range. We apply the nonlinear optical cascade difference frequency conversion theory based on stimulated Raman adiabatic passage (STIRAP) and propose a theoretical scheme to generate THZ waves. Numerical simulation investigates the cascaded difference frequency process of generating THZ waves with the help of the nonlinear medium lithium niobate (LN) crystal. The theoretical analysis shows that the maximum quantum conversion efficiency from signal laser to THZ waves is 43.2 % when the wavelength of the tuned signal laser varies between 1.044 - 1.065 µm with the fixed two pump laser wavelengths constant. The tunable THZ waves of 0.48 - 5.0 THz can be obtained and the maximum output intensity of THZ waves is 2.17 MW/cm2, and the method is robust to temperature variations. It also provides a novel idea for the cascaded difference frequency generation of THZ waves.

13.
Gland Surg ; 11(7): 1192-1203, 2022 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-35935571

RESUMEN

Background: Studies have investigated the relationship between sleep disturbance and postoperative delirium (PD) but have controversial results. A systematic review and meta-analysis have a high level of evidence to comprehensively evaluate the effect of sleep disturbance on PD. Our study aims to provide available evidence regarding the effect of sleep disturbance on PD. Methods: PubMed, Embase, Cochrane Library, and Web of Science databases were searched for relevant studies from database inception to April 28, 2021. The eligible studies were identified according to the "PICOS" principles. Odds ratio (OR) was used to indicate the effect index, and 95% confidence interval (CI) was applied to express the effect size. The heterogeneity was tested. Subgroup analyses, meta-regression, and sensitivity analysis were also applied. Begg's test was used to test potential publication bias. The modified Newcastle-Ottawa Scale (NOS) was used to evaluate the literature quality. Results: Totally, 18 articles including 2,714 patients were enrolled, with most of the included literature being of moderate to high quality. The results of systematic and meta-analysis suggested that sleep disturbance was associated with an increased risk of PD (OR: 3.731; 95% CI: 2.338 to 5.956). Subgroup analysis results demonstrated that sleep disturbance in patients aged <65 years (OR: 6.072; 95% CI: 3.054 to 12.071), aged ≥65 years (OR: 2.904; 95% CI: 1.487 to 5.671), and undergoing cardiac (OR: 3.390; 95% CI: 1.359 to 8.453), orthopedic (OR: 3.943; 95% CI: 2.219 to 7.008), or other surgeries (OR: 4.963; 95% CI: 2.156 to 11.420) increased the risk of PD (all P<0.005). Moreover, increased risk of PD was found for both preoperative (OR: 2.804; 95% CI: 1.517 to 5.184) and postoperative (OR: 6.302; 95% CI: 3.794 to 10.467) sleep disturbance (all P<0.005). No associations between obstructive sleep apnea (OSA; OR: 2.008; 95% CI: 0.753 to 5.354; P=0.164), insomnia (OR: 4.005; 95% CI: 0.636 to 25.203; P=0.139) and risk of PD were observed. Conclusions: Our study indicated the relationship between sleep disturbance and the risk of PD. Patients undergoing surgical treatments should pay attention to their sleep quality. However, more research is needed to confirm its relationship.

14.
Nat Commun ; 12(1): 5832, 2021 10 05.
Artículo en Inglés | MEDLINE | ID: mdl-34611160

RESUMEN

Maize ear size and kernel number differ among lines, however, little is known about the molecular basis of ear length and its impact on kernel number. Here, we characterize a quantitative trait locus, qEL7, to identify a maize gene controlling ear length, flower number and fertility. qEL7 encodes 1-aminocyclopropane-1- carboxylate oxidase2 (ACO2), a gene that functions in the final step of ethylene biosynthesis and is expressed in specific domains in developing inflorescences. Confirmation of qEL7 by gene editing of ZmACO2 leads to a reduction in ethylene production in developing ears, and promotes meristem and flower development, resulting in a ~13.4% increase in grain yield per ear in hybrids lines. Our findings suggest that ethylene serves as a key signal in inflorescence development, affecting spikelet number, floral fertility, ear length and kernel number, and also provide a tool to improve grain productivity by optimizing ethylene levels in maize or in other cereals.


Asunto(s)
Zea mays/metabolismo , Zea mays/fisiología , Mapeo Cromosómico , Grano Comestible/genética , Grano Comestible/metabolismo , Etilenos/metabolismo , Meristema/citología , Meristema/metabolismo , Sitios de Carácter Cuantitativo/genética
15.
J High Energy Phys ; 2021(3): 184, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33776409

RESUMEN

The millicharged particle has become an attractive topic to probe physics beyond the Standard Model. In direct detection experiments, the parameter space of millicharged particles can be constrained from the atomic ionization process. In this work, we develop the relativistic impulse approximation (RIA) approach, which can duel with atomic many-body effects effectively, in the atomic ionization process induced by millicharged particles. The formulation of RIA in the atomic ionization induced by millicharged particles is derived, and the numerical calculations are obtained and compared with those from free electron approximation and equivalent photon approximation. Concretely, the atomic ionizations induced by mllicharged dark matter particles and millicharged neutrinos in high-purity germanium (HPGe) and liquid xenon (LXe) detectors are carefully studied in this work. The differential cross sections, reaction event rates in HPGe and LXe detectors, and detecting sensitivities on dark matter particle and neutrino millicharge in next-generation HPGe and LXe based experiments are estimated and calculated to give a comprehensive study. Our results suggested that the next-generation experiments would improve 2-3 orders of magnitude on dark matter particle millicharge δ χ than the current best experimental bounds in direct detection experiments. Furthermore, the next-generation experiments would also improve 2-3 times on neutrino millicharge δ ν than the current experimental bounds.

16.
Diagn Pathol ; 15(1): 49, 2020 May 11.
Artículo en Inglés | MEDLINE | ID: mdl-32393293

RESUMEN

BACKGROUND: The objective of this study was to investigate genetic variations and the relationships between these genetic variations and clinicopathological features of high-recurrence risk papillary thyroid carcinoma in a southern Chinese population. METHODS: One hundred sixty-eight patients of high-recurrence risk papillary thyroid carcinoma were recruited for this study from 2017 to 2018. Formalin-fixed paraffin-embedded tissue and the data of clinicopathological characteristics were all collected and analyzed from these patients. We used next-generation sequencing technology to investigate the targeted gene mutations and gene fusions of the pathology specimens. RESULTS: The frequency of candidate tumor driver gene mutation was 85.1% in 143 patients, including BRAF V600E mutation in 119 patients(70.8%), RET fusion in 13 patients(7.7%), TERT promoter mutations in 11 patients(6.5%), RAS (HRAS, NRAS, KRAS) gene mutations in 10 patients(6.0%), and other mutations involving TP53, PIK3CA, AKT1, PTEN and NTRK1. Concomitant presence of more than two genetic aberrations was seen in 27 patients (16.1%). Our study showed that BRAF V600E mutation is highly correlated with conventional PTC (p < 0.001), BRAF V600E and TERT promoter mutation duet was associated with older patient age (> 45, p = 0.003) and higher disease stage of III or IV (p = 0.002). RAS gene and BRAF V600E co-mutations were only seen in multifocal PTC (p = 0.015). CONCLUSION: In our high-recurrence risk PTC cohort, most patients had more than one driver gene aberration. Coexistence of BRAF V600E with TERT promoter mutations or with RAS mutations were significantly correlated with worse clinicopathological characteristics.


Asunto(s)
Recurrencia Local de Neoplasia/genética , Cáncer Papilar Tiroideo/genética , Neoplasias de la Tiroides/genética , Adulto , Anciano , Pueblo Asiatico/genética , Femenino , Humanos , Masculino , Persona de Mediana Edad , Regiones Promotoras Genéticas/genética , Proteínas Proto-Oncogénicas B-raf/genética , Telomerasa/genética , Proteínas ras/genética
17.
Nat Commun ; 11(1): 988, 2020 02 20.
Artículo en Inglés | MEDLINE | ID: mdl-32080171

RESUMEN

Increasing grain yield of maize (Zea mays L.) is required to meet the rapidly expanding demands for maize-derived food, feed, and fuel. Breeders have enhanced grain productivity of maize hybrids by pyramiding desirable characteristics for larger ears. However, loci selected for improving grain productivity remain largely unclear. Here, we show that a serine/threonine protein kinase encoding gene KERNEL NUMBER PER ROW6 (KNR6) determines pistillate floret number and ear length. Overexpression of KNR6 or introgression of alleles lacking the insertions of two transposable elements in the regulatory region of KNR6 can significantly enhance grain yield. Further in vitro evidences indicate that KNR6 can interact with an Arf GTPase-activating protein (AGAP) and its phosphorylation by KNR6 may affect ear length and kernel number. This finding provides knowledge basis to enhance maize hybrids grain yield.


Asunto(s)
Proteínas de Plantas/genética , Proteínas Serina-Treonina Quinasas/genética , Zea mays/genética , Mapeo Cromosómico , Grano Comestible/enzimología , Grano Comestible/genética , Grano Comestible/crecimiento & desarrollo , Proteínas Activadoras de GTPasa/metabolismo , Genes de Plantas , Fenotipo , Fosforilación , Fitomejoramiento , Proteínas de Plantas/metabolismo , Proteínas Serina-Treonina Quinasas/metabolismo , Sitios de Carácter Cuantitativo , Zea mays/enzimología , Zea mays/crecimiento & desarrollo
18.
Int J Mol Sci ; 21(3)2020 Feb 10.
Artículo en Inglés | MEDLINE | ID: mdl-32050518

RESUMEN

High temperature at anthesis is one of the most serious stress factors for rice (Oryza sativa L.) production, causing irreversible yield losses and reduces grain quality. Illustration of thermotolerance mechanism is of great importance to accelerate rice breeding aimed at thermotolerance improvement. Here, we identified a new thermotolerant germplasm, SDWG005. Microscopical analysis found that stable anther structure of SDWG005 under stress may contribute to its thermotolerance. Dynamic transcriptomic analysis totally identified 3559 differentially expressed genes (DEGs) in SDWG005 anthers at anthesis under heat treatments, including 477, 869, 2335, and 2210 for 1, 2, 6, and 12 h, respectively; however, only 131 were regulated across all four-time-points. The DEGs were divided into nine clusters according to their expressions in these heat treatments. Further analysis indicated that some main gene categories involved in heat-response of SDWG005 anthers, such as transcription factors, nucleic acid and protein metabolisms related genes, etc. Comparison with previous studies indicates that a core gene-set may exist for thermotolerance mechanism. Expression and polymorphic analysis of agmatine-coumarin-acyltransferase gene OsACT in different accessions suggested that it may involve in SDWG005 thermotolerance. This study improves our understanding of thermotolerance mechanisms in rice anthers during anthesis, and also lays foundation for breeding thermotolerant varieties via molecular breeding.


Asunto(s)
Oryza/genética , Termotolerancia , Transcriptoma , Acetiltransferasas/genética , Acetiltransferasas/metabolismo , Flores/genética , Flores/crecimiento & desarrollo , Oryza/crecimiento & desarrollo , Oryza/metabolismo , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo
19.
Medicine (Baltimore) ; 97(39): e12543, 2018 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-30278547

RESUMEN

RATIONALE: Myxoma is the most common primary benign cardiac tumor, which could lead to some fatal complications because of its strategic position. PATIENT CONCERNS: The patient was admitted to our hospital due to sudden onset of palpitation, chest tightness, mild fever, night sweats, accompanied with bilateral lower extremities adynamia, and paralysis for 5 days, but no obvious syncope and edema. DIAGNOSES: Transthoracic echocardiography showed a giant mobile myxoma (72 × 58 mm) in the right atrium (RA). Magnetic resonance imaging revealed an erosive space-occupying lesion located between the first and third thoracic vertebrae. INTERVENTIONS: Thoracic vertebral lesions were resected immediately to rescue the incomplete paraplegia. After the patient was placed in the prone position, significant hemodynamics changes were observed due to the displacement of the huge RA myxoma. OUTCOMES: Stable hemodynamics was maintained during the operation through control of fluid infusion combined with vasoactive drugs. LESSONS: Change in body position may lead to obstruction of intracardiac blood flow in patients with giant myxoma. This clinical manifestation is rarely reported.


Asunto(s)
Procedimientos Quirúrgicos Cardíacos , Atrios Cardíacos , Neoplasias Cardíacas , Hemodinámica , Cuidados Intraoperatorios/métodos , Complicaciones Intraoperatorias , Laminectomía/métodos , Mixoma , Paraplejía , Vasoconstrictores/administración & dosificación , Adulto , Procedimientos Quirúrgicos Cardíacos/efectos adversos , Procedimientos Quirúrgicos Cardíacos/métodos , Descompresión Quirúrgica/métodos , Ecocardiografía/métodos , Atrios Cardíacos/diagnóstico por imagen , Atrios Cardíacos/fisiopatología , Insuficiencia Cardíaca/etiología , Insuficiencia Cardíaca/fisiopatología , Insuficiencia Cardíaca/terapia , Neoplasias Cardíacas/complicaciones , Neoplasias Cardíacas/patología , Neoplasias Cardíacas/fisiopatología , Neoplasias Cardíacas/cirugía , Humanos , Complicaciones Intraoperatorias/etiología , Complicaciones Intraoperatorias/fisiopatología , Complicaciones Intraoperatorias/terapia , Imagen por Resonancia Magnética/métodos , Masculino , Mixoma/complicaciones , Mixoma/patología , Mixoma/fisiopatología , Mixoma/cirugía , Paraplejía/etiología , Paraplejía/fisiopatología , Paraplejía/cirugía , Posicionamiento del Paciente , Vértebras Torácicas/diagnóstico por imagen , Vértebras Torácicas/patología , Vértebras Torácicas/cirugía , Resultado del Tratamiento
20.
J Proteome Res ; 17(2): 822-833, 2018 02 02.
Artículo en Inglés | MEDLINE | ID: mdl-29250956

RESUMEN

The differentiation and subsequent development of plant tissues or organs are tightly regulated at multiple levels, including the transcriptional, posttranscriptional, translational, and posttranslational levels. Transcriptomes define many of the tissue-specific gene expression patterns in maize, and some key genes and their regulatory networks have been established at the transcriptional level. In this study, the sequential window acquisition of all theoretical spectra-mass spectrometry technique was employed as a quantitative proteome assay of four representative maize tissues, and a set of high-confidence proteins was identified. Integrated analysis of the proteome and transcriptome revealed that protein abundance was positively correlated with mRNA level with weak to moderate correlation coefficients, but the abundance of key proteins for function or architecture in a given tissue was closely tempospatially regulated at the transcription level. A subset of differentially expressed proteins, specifically tissue-specific highly expressed proteins, was identified, for example, reproductive structure and flower development-related proteins in tassel and ear, lipid and fatty acid biosynthetic process-related proteins in immature embryo, and inorganic substance and oxidation reduction responsive proteins in root, potentially revealing the physiology, morphology, and function of each tissue. Furthermore, we found many new proteins in specific tissues that were highly correlated with their mRNA levels, in addition to known key factors. These proteome data provide new perspective for understanding many aspects of maize developmental biology. Raw proteomics data are available via ProteomeXchange with identifier PXD008464.


Asunto(s)
Regulación de la Expresión Génica de las Plantas , Proteínas de Plantas/aislamiento & purificación , Proteoma/aislamiento & purificación , ARN Mensajero/genética , Transcriptoma , Zea mays/genética , Cromatografía Líquida de Alta Presión/métodos , Flores/genética , Flores/crecimiento & desarrollo , Flores/metabolismo , Perfilación de la Expresión Génica , Regulación del Desarrollo de la Expresión Génica , Redes Reguladoras de Genes , Redes y Vías Metabólicas/genética , Especificidad de Órganos , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Raíces de Plantas/genética , Raíces de Plantas/crecimiento & desarrollo , Raíces de Plantas/metabolismo , Proteoma/genética , Proteoma/metabolismo , Proteómica/métodos , ARN Mensajero/metabolismo , Semillas/genética , Semillas/crecimiento & desarrollo , Semillas/metabolismo , Espectrometría de Masa por Láser de Matriz Asistida de Ionización Desorción , Zea mays/crecimiento & desarrollo , Zea mays/metabolismo
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