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1.
Int J Mol Sci ; 25(12)2024 Jun 11.
Artículo en Inglés | MEDLINE | ID: mdl-38928141

RESUMEN

Unlike sedentary plant-parasitic nematodes, migratory plant endoparasitic nematodes (MPENs) are unable to establish permanent feeding sites, and all developmental stages (except eggs) can invade and feed on plant tissues and can be easily overlooked because of the unspecific symptoms. They cause numerous economic losses in agriculture, forestry, and horticulture. In order to understand the pathogenetic mechanism of MPENs, here we describe research on functions and host targets focused on currently identified effectors from six MPENs, namely Radopholus similis, Pratylenchus spp., Ditylenchus destructor, Bursaphelenchus xylophilus, Aphelenchoides besseyi, and Hirschmanniella oryzae. This information will provide valuable insights into understanding MPEN effectors and for future fostering advancements in plant protection.


Asunto(s)
Interacciones Huésped-Parásitos , Enfermedades de las Plantas , Plantas , Animales , Enfermedades de las Plantas/parasitología , Plantas/parasitología , Nematodos/patogenicidad , Proteínas del Helminto/metabolismo
2.
Artículo en Inglés | MEDLINE | ID: mdl-38836727

RESUMEN

Aim: This study aimed to compare the effectiveness of enhanced CT scanning and MRI as diagnostic tools for the detection of carcinoma of the liver. Methods: The image diagnostic significance of the liver enhanced CT & MRI scans was examined after a retrospective examination of the imaging data of 51 individuals with liver cancer who were identified with postoperative pathology at the First People's Hospital of Lianyungang between May 2020 to May 2022. Results: The number of extrahepatic lesions as well as the rate of extrahepatic positive cases were not significantly different between liver contrast-enhanced CT and liver MRI (P > .05); however, the number of intrahepatic lesions and the rate of intrahepatic positive cases were considerably higher for liver MRI than for liver enhanced CT (P < .05). When identifying tumors with a diameter greater than 3 cm, there was no discernible difference between the detection rates of liver enhanced CT and liver MRI (P > .05); however, in the diagnosis of tumors less than 3 cm in diameter, liver MRI had a greater detection rate than liver contrast-enhanced CT (P < .05). Overall, liver MRI had a higher detection rate than liver contrast-enhanced CT (P < .05). Furthermore, when compared to liver contrast-enhanced CT, liver MRI had greater accuracy, specificity, sensitivity, negative predictive value, and positive predictive value (P < .05). Conclusion: When it comes to detecting liver cancer, liver MRI is more sensitive and specific than liver CT.

3.
Appl Microbiol Biotechnol ; 108(1): 298, 2024 Apr 12.
Artículo en Inglés | MEDLINE | ID: mdl-38607493

RESUMEN

Radopholus similis is a destructive, migratory, and endophytoparasitic nematode. It has two morphologically indistinguishable pathotypes (or physiological races): banana and citrus pathotypes. At present, the only reliable method to differentiate the two pathotypes is testing the infestation and parasitism of nematodes on Citrus spp. via inoculation. However, differences in inoculation methods and conditions adopted by different researchers complicate obtaining consistent results. In this study, the parasitism and pathogenicity of 10 R. similis populations on rough lemon (Citrus limon) seedlings and the tropism and invasion of rough lemon roots were tested. It revealed that populations SWK, GJ, FZ, GZ, DBSR, and YJ were citrus pathotypes, which showed parasitism and pathogenicity on rough lemon and could invade rough lemon roots, whereas populations XIN, ML, HN6, and HL were banana pathotypes, having no parasitism and pathogenicity on rough lemon and they did not invade the rough lemon roots. Four pectate lyase genes (Rs-pel-2, Rs-pel-3, Rs-pel-4, and Rs-pel-5) belonging to the Class III family from these populations were amplified and analysed. The gene Rs-pel-3 could be amplified from six citrus pathotype populations and was stably expressed in the four developmental stages of the nematode, whereas it could not be amplified from the four banana pathotypes. Rs-pel-3 expression may be related to the parasitism and pathogenicity of R. similis on rough lemon. Hence, it can be used as a molecular marker to distinguish between banana and citrus pathotypes and as a target gene for the molecular identification of these two pathotypes. KEY POINTS: • Four pectate lyase genes (Rs-pels) from Radopholus similis were cloned and analysed. • The expression of Rs-pels is different in two pathotypes of Radopholus similis. • A molecular identification method for two pathotypes of Radopholus similis using pectate lyase gene Rs-pel-3 as the target gene was established.


Asunto(s)
Tylenchoidea , Animales , Tylenchoidea/genética , Raíces de Plantas , Polisacárido Liasas/genética , Plantones
4.
J Chromatogr Sci ; 2024 Mar 28.
Artículo en Inglés | MEDLINE | ID: mdl-38553778

RESUMEN

Shexiang Tongxin Dropping Pill (STP) is a composite formula of traditional Chinese medicine that is widely used for the treatment of cardiovascular diseases. It consists of seven medicinal extracts thereof or materials, including Bufonis venenum, synthetic Moschus, Panax ginseng, Bovis calculus artifactus, Bear bile powder, Salvia miltiorrhiza Bge and synthetic borneol. However, it is considerably difficult to evaluate the quality of STP due to its complex chemical compositions. This paper was designed to explore a comprehensive and systematic method combining fingerprints and chemical identification for quality assessment of STP samples. Twenty batches of STP samples were analyzed by high-performance liquid chromatography (HPLC) and high-performance liquid chromatography-quadrupole time-of-flight tandem mass spectrometry. Ten common peaks were detected by HPLC fingerprint similarity evaluation system. Meanwhile, 100 compounds belonging to 4 structural characteristics, including 23 bufadienolides, 36 organic acids, 34 saponins and 7 other types, were systematically identified as the basic components in STP. This study could be used for clarifying the multiple bioactive substances and developing a comprehensive quality evaluation method of STP.

5.
Sci Rep ; 14(1): 7253, 2024 03 27.
Artículo en Inglés | MEDLINE | ID: mdl-38538666

RESUMEN

Due to the highly conserved structure, animal mitochondrial genome (mtDNA) is widely used in classification, evolution, phylogeny, population genetic structure and other fields. We reported on the five circle multipartite mtDNAs of a newly described species of Globodera, Globodera vulgaris (Gv) from potatoes in China. The results showed that the mtDNA of Gv was obtained through second- and third-generation sequencing, with a total length of 42,995 bp. It contained 12 protein-coding genes, two rRNA genes and 17 tRNA genes, which were distributed in different subgenomic circles. Comparison of the differences in mtDNA among Gv, G. rostochiensis, G. pallida and G. ellingtonae showed that the size and arrangement of the genes in the mtDNA of the genus Globodera were variable and not conserved. The codon usage bias of the mitochondrial protein-coding gene of Gv showed that Gv might have originated from locally and more primitive group of existing Globodera. Based on the cytochrome c oxidase subunits I genes (COX1) and the nicotinamide adenine dinucleotide dehydrogenase subunits I genes (ND1), and the results showed that Gv was clustered with Globodera spp. according to the COX1 and ND1 in scmtDNA-V, while Gv was clustered with Meloidogyne spp. according to ND1 in scmtDNA-III. The results of this study provided a new basis for understanding the multipartite structure of mtDNA as a phylogenetic and taxonomic feature of the genus Globodera. The number of subgenomic circles is a diagnostic feature of species and the arrangement order and size of mitochondrial protein-coding genes also have important application value in species identification within the genus.


Asunto(s)
Genoma Mitocondrial , Tylenchoidea , Animales , Genoma Mitocondrial/genética , Filogenia , Tylenchoidea/genética , ADN Mitocondrial/genética , Proteínas Mitocondriales/genética
6.
BMC Psychol ; 12(1): 101, 2024 Feb 27.
Artículo en Inglés | MEDLINE | ID: mdl-38414009

RESUMEN

OBJECTIVE: The percentage of adolescents with test anxiety is increasing rapidly. Working memory (WM) training has been demonstrated to reduce anxiety levels and enhance attentional control in individuals. Therefore, we investigated whether adaptive dual n-back WM training could lower test anxiety level and improve attentional control in adolescents. METHODS: Forty adolescents were allocated to either adaptive dual n-back WM training (n = 21) or non-adaptive dual 1-back WM training (n = 19) for 10 days. The Test Anxiety Scale was applied to measure individuals' test anxiety symptoms. The Attentional Control Scale (ACS), the flanker task, and the Go/Nogo task were used to measure attentional control. RESULTS: Compared with the control group, the training group reported significantly relief of test anxiety symptoms; however, there were no significant differences between the two groups in pre-to-post changes in ACS scores or performance on the flanker task and Go/Nogo task. CONCLUSION: In sum, adaptive dual n-back WM training effectively reduced adolescents' level of test anxiety but did not improve their attentional control.


Asunto(s)
Memoria a Corto Plazo , Ansiedad ante los Exámenes , Humanos , Adolescente , Entrenamiento Cognitivo , Ansiedad , Atención
7.
World J Clin Cases ; 11(27): 6476-6482, 2023 Sep 26.
Artículo en Inglés | MEDLINE | ID: mdl-37900252

RESUMEN

BACKGROUND: An unusual case of acute acquired concomitant esotropia (AACE) with congenital paralytic strabismus in the right eye is reported. CASE SUMMARY: A 23-year-old woman presented with complaints of binocular diplopia and esotropia of the right eye lasting 4 years and head tilt to the left since 1 year after birth. The Bielschowsky head tilt test showed right hypertropia on a right head tilt. She did not report any other intracranial pathology. A diagnosis of AACE and right congenital paralytic strabismus was made. Then, she underwent medial rectus muscle recession and lateral rectus muscle resection combined with inferior oblique muscle myectomy in the right eye. One day after surgery, the patient reported that she had no diplopia at either distance or near fixation and was found to be orthophoric in the primary position; furthermore, her head posture immediately and markedly improved. CONCLUSION: In future clinical work, in cases of AACE combined with other types of strabismus, we can perform conventional single surgery for both at the same time, and the two types of strabismus can be solved simultaneously.

8.
Circ Res ; 133(3): 237-251, 2023 07 21.
Artículo en Inglés | MEDLINE | ID: mdl-37345556

RESUMEN

BACKGROUND: Progressive cardiac fibrosis leads to ventricular wall stiffness, cardiac dysfunction, and eventually heart failure, but the underlying mechanism remains unexplored. PDCD5 (programmed cell death 5) ubiquitously expresses in tissues, including the heart; however, the role of PDCD5 in cardiac fibrosis is largely unknown. Therefore, this study aims at exploring the possible role and underlying mechanisms of PDCD5 in the pathogenesis of cardiac fibrosis. METHODS AND RESULTS: PDCD5 levels were found to be elevated in the serum obtained from patients with cardiac fibrosis, in fibrotic mice heart tissues after myocardial infarction, and in cardiac fibroblasts stimulated by Ang II (angiotensin II)- or TGF-ß1 (transforming growth factor-ß1). Overexpression of PDCD5 in cardiac fibroblasts or treatment with PDCD5 protein reduced the expression of profibrogenic proteins in response to TGF-ß1 stimulation, while knockdown of PDCD5 increased fibrotic responses. It has been demonstrated that SMAD3, a protein that is also known as mothers against decapentaplegic homolog 3, directly upregulated PDCD5 during cardiac fibrosis. Subsequently, the increased PDCD5 promoted HDAC3 (histone deacetylase 3) ubiquitination, thus, inhibiting HDAC3 to reduce fibrotic responses. Fibroblast-specific knock-in of PDCD5 in mice ameliorated cardiac fibrosis after myocardial infarction and enhanced cardiac function, and these protective effects were eliminated by AAV9-mediated HDAC3 overexpression. CONCLUSIONS: The findings of this study demonstrated that PDCD5 is upregulated by SMAD3 during cardiac fibrosis, which subsequently ameliorated progressive fibrosis and cardiac dysfunction through HDAC3 inhibition. Thus, this study suggests that PDCD5 functions as a negative feedback factor on fibrotic signaling pathways and might serve as a potential therapeutic target to suppress the progression of fibrotic responses.


Asunto(s)
Infarto del Miocardio , Factor de Crecimiento Transformador beta1 , Ratones , Animales , Factor de Crecimiento Transformador beta1/metabolismo , Infarto del Miocardio/metabolismo , Corazón , Fibroblastos/metabolismo , Apoptosis , Fibrosis , Proteína smad3/metabolismo , Miocardio/metabolismo
9.
Zootaxa ; 5231(5): 552-566, 2023 Feb 02.
Artículo en Inglés | MEDLINE | ID: mdl-37045126

RESUMEN

A species of Trichotylenchus nematode was isolated from the rhizosphere of banana root in Leizhou City, Guangdong Province, China. The species assumes the following characteristics: open C-shaped body; head offset from body; lateral field with three incisures, pharyngeal and tail regions irregularly areolated; stylet 18.6-20.7 µm long; pharyngeal gland not extending over intestine; fibrous tissue present in the intestine; post-anal intestinal sac present; elongate-subcylindroid tail, bluntly conoid terminus, lack of striations, and containing 34-44 annuli. In addition, scanning electron microscopy was used to elucidate some morphological details, but only some juveniles were observed. Partial 18S rRNA, ITS, and 28S D2-D3 expansion sequences were amplified with universal primers and deposited in GenBank under accession numbers ON622716, ON622717, and ON622714, respectively. Here, this species was identified as T. dispersus [(Siddiqi & Sharma, 1995) Geraert, 2011].


Asunto(s)
Tylenchoidea , Animales , Tylenchoidea/genética , Rizosfera , China , Bases de Datos de Ácidos Nucleicos
10.
Phytopathology ; 113(8): 1560-1582, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-36825334

RESUMEN

In this study, a new spherical cyst nematode belonging to the genus Globodera, herein described as Globodera vulgaris n. sp., was extracted from the roots and rhizosphere soil of potato and circumjacent weeds belonging to different families in three provinces in southwest China. The new species was characterized by 8 to 24 ridges between the anus and fenestra and an average Granek's ratio of 2.8 to 3.8 in cysts, a head with three to four annules, a dorsal knob anteriorly projected, ventral knobs round or anteriorly projected in second stage juveniles, a head with three to five annules, a short spicule with an average length of less than 30.0 µm, and a developed velum in males. Pathogenicity tests showed that G. vulgaris n. sp. infected potato but did not damage or affect the potato yield compared with the control, and it parasitized tomato with a low reproduction rate (RF < 1) while it did not parasitize tobacco (RF = 0). The new species was closely related to G. rostochiensis, based on molecular diagnostic marker sequences and constructed phylogenetic analysis, based on internal transcribed spacers of ribosomal DNA, large-subunit rDNA, and small-subunit rDNA. However, the new species exhibited differences from G. rostochiensis in terms of morphological characteristics, a wide host preference, lack of damage to hosts, and an egg-hatching rate induced by hatching factors.

11.
New Phytol ; 237(4): 1374-1390, 2023 02.
Artículo en Inglés | MEDLINE | ID: mdl-36349395

RESUMEN

Autophagy, an intracellular degradation system conserved in eukaryotes, has been increasingly recognized as a key battlefield in plant-pathogen interactions. However, the role of plant autophagy in nematode parasitism is mostly unknown. We report here the identification of a novel and conserved effector, Nematode Manipulator of Autophagy System 1 (NMAS1), from plant-parasitic cyst nematodes (Heterodera and Globodera spp.). We used molecular and genetic analyses to demonstrate that NMAS1 is required for nematode parasitism. The NMAS1 effectors are potent suppressors of reactive oxygen species (ROS) induced by flg22 and cell death mediated by immune receptors in Nicotiana benthamiana, suggesting a key role of NMAS1 effectors in nematode virulence. Arabidopsis atg mutants defective in autophagy showed reduced susceptibility to nematode infection. The NMAS1 effectors contain predicted AuTophaGy-related protein 8 (ATG8)-interacting motif (AIM) sequences. In planta protein-protein interaction assays further demonstrated that NMAS1 effectors specifically interact with host plant ATG8 proteins. Interestingly, mutation in AIM2 of GrNMAS1 from the potato cyst nematode Globodera rostochiensis abolishes its interaction with potato StATG8 proteins and its activity in ROS suppression. Collectively, our results reveal for the first time that cyst nematodes employ a conserved AIM-containing virulence effector capable of targeting a key component of host autophagy to promote disease.


Asunto(s)
Arabidopsis , Nematodos , Tylenchoidea , Animales , Virulencia , Especies Reactivas de Oxígeno/metabolismo , Proteínas del Helminto/metabolismo , Nematodos/metabolismo , Proteínas de Plantas/metabolismo , Autofagia , Tylenchoidea/fisiología , Enfermedades de las Plantas/genética
12.
Int J Mol Sci ; 23(20)2022 Oct 14.
Artículo en Inglés | MEDLINE | ID: mdl-36293146

RESUMEN

Fatty acid and retinol binding proteins (FAR) are unique proteins found in nematodes and are considered potential targets for controlling these parasites. However, their functions in nematode parasitism and pathogenicity and interaction with hosts are still unclear. In this study, we investigated the specific roles of rice white tip nematodes (RWTNs), Aphelenchoides besseyi, and a protein, Ab-FAR-1, to elucidate the parasitic and pathogenic processes of nematodes. The results showed that the expression level of Ab-far-1 was significantly up-regulated after A. besseyi infection of the plant. The immunofluorescence and subcellular localisation showed that Ab-FAR-1 was secreted into plant tissues mainly through the body wall of nematodes and might act in the nucleus and cytoplasm of plant cells. The pathogenicity of RWTNs was enhanced in Arabidopsis thaliana overexpressing Ab-FAR-1 and inhibited in Ab-far-1 RNAi A. thaliana. Yeast two-hybrid, Co-IP, BiFC, and nematode inoculation experiments showed that Ab-FAR-1 could interact with the A. thaliana actin-depolymerizing factor protein AtADF3, and the A. thaliana adf3 mutant was more susceptible to nematodes. An in vitro actin filament depolymerisation assay demonstrated that Ab-FAR-1 could inhibit AtADF3-mediated depolymerisation of actin filaments, and the turnover process of cellular actin filaments was also affected in A. thaliana overexpressing Ab-FAR-1. In addition, flg22-mediated host defence responses were suppressed in A. thaliana overexpressing Ab-FAR-1 and adf3 mutants. Therefore, this study confirmed that RWTNs can affect the turnover of actin filament remodelling mediated by AtADF3 through Ab-FAR-1 secretion and thus inhibit plant PAMP-triggered immunity (PTI), promoting the parasitism and pathogenicity of nematodes.


Asunto(s)
Arabidopsis , Rabdítidos , Tylenchida , Tylenchoidea , Animales , Arabidopsis/metabolismo , Virulencia , Moléculas de Patrón Molecular Asociado a Patógenos , Actinas/metabolismo , Proteínas del Helminto/metabolismo , Tylenchida/fisiología , Rabdítidos/metabolismo , Proteínas de Unión al Retinol/metabolismo , Ácidos Grasos , Citoesqueleto de Actina/metabolismo , Enfermedades de las Plantas/parasitología , Tylenchoidea/metabolismo
13.
Diagn Interv Radiol ; 28(5): 441-449, 2022 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-36097638

RESUMEN

PURPOSE Radiomics can be used to determine the prognosis of gastric cancer (GC). The objective of this study was to predict the disease-free survival (DFS) after GC surgery based on computed tomography-enhanced images combined with clinical features. METHODS Clinical, imaging, and pathological data of patients who underwent gastric adenocarcinoma resection from June 2015 to May 2019 were retrospectively analyzed. The primary outcome was DFS. Radiomics features were selected using Least Absolute Shrinkage and Selection Operator algorithm and converted into the Rad-score. A nomogram was constructed based on the Radscore and other clinical factors. The Rad-score and nomogram were validated in the training and validation groups. RESULTS Totally, 179 patients were randomly divided into the training (n=124) and validation (n=55) groups. In the training group, validation group, and overall population, the Rad-score could be divided into categories indicating low, moderate, and high risk of recurrence, metastasis, or death; all risk categories showed a significant difference between the training, validation, and overall population groups (all P < .001). Positive lymph nodes (hazard ratio (HR)=3.07, 95% CI: 1.52-6.23, P=.002), cancer antigen-125 (HR=3.24, 95% CI: 1.54-6.80, P=.002), and the Radscore (HR=0.73, 95% CI: 0.61-0.87, P < .001) were independently associated with DFS. These 3 variables were used to construct a nomogram. In the training group, the areas under the curve at 3 years were 0.758 and 0.776 for the Rad-score and the nomogram, respectively, while they were both 1.000 in the validation group. The net benefit rate was analyzed using a decision curve in the training and validation groups, and the nomogram was superior to the single Rad-score. CONCLUSION Rad-score is an independent factor for DFS after gastrectomy for GC. The nomogram established in this study could be an effective tool for the clinical prediction of DFS after gastrectomy.


Asunto(s)
Nomogramas , Neoplasias Gástricas , Antígeno Ca-125 , Supervivencia sin Enfermedad , Humanos , Estudios Retrospectivos , Neoplasias Gástricas/diagnóstico por imagen , Neoplasias Gástricas/cirugía , Tomografía Computarizada por Rayos X/métodos
14.
Cells ; 11(18)2022 09 14.
Artículo en Inglés | MEDLINE | ID: mdl-36139448

RESUMEN

Peptide transporter 2 (PepT2) in mammals plays essential roles in the reabsorption and conservation of peptide-bound amino acids in the kidney and in maintaining neuropeptide homeostasis in the brain. It is also of significant medical and pharmacological significance in the absorption and disposing of peptide-like drugs, including angiotensin-converting enzyme inhibitors, ß-lactam antibiotics and antiviral prodrugs. Understanding the structure, function and regulation of PepT2 is of emerging interest in nutrition, medical and pharmacological research. In this review, we provide a comprehensive overview of the structure, substrate preferences and localization of PepT2 in mammals. As PepT2 is expressed in various organs, its function in the liver, kidney, brain, heart, lung and mammary gland has also been addressed. Finally, the regulatory factors that affect the expression and function of PepT2, such as transcriptional activation and posttranslational modification, are also discussed.


Asunto(s)
Profármacos , Simportadores , Aminoácidos , Inhibidores de la Enzima Convertidora de Angiotensina , Animales , Antibacterianos , Antivirales , Biología , Mamíferos/metabolismo , Proteínas de Transporte de Membrana , Péptidos/metabolismo , Simportadores/metabolismo , beta-Lactamas
15.
Cell Death Dis ; 13(7): 634, 2022 07 21.
Artículo en Inglés | MEDLINE | ID: mdl-35864106

RESUMEN

Hypoxic pulmonary hypertension (PH) is a progressive disease characterized by hyper-proliferation of pulmonary vascular cells including pulmonary artery smooth muscle cells (PASMCs) and can lead to right heart failure and early death. Selective degradation of mitochondria by mitophagy during hypoxia regulates mitochondrial functions in many cells, however, it is not clear if mitophagy is involved in the pathogenesis of hypoxic PH. By employing the hypoxic mitophagy receptor Fundc1 knockout (KO) and transgenic (TG) mouse models, combined hypoxic PH models, the current study found that mitophagy is actively involved in hypoxic PH through regulating PASMC proliferation. In the pulmonary artery medium from hypoxic PH mice, mitophagy was upregulated, accompanied with the increased active form of FUNDC1 protein and the enhanced binding affinity of FUNDC1 with LC3B. In PASMCs, overexpression of FUNDC1 increased mitophagy and cell proliferation while knockdown of FUNDC1 inhibited hypoxia-induced mitophagy and PASMC proliferation. Stimulation of mitophagy by FUNDC1 in PASMCs elevated ROS production and inhibited ubiquitination of hypoxia inducible factor 1α (HIF1α), and inhibition of mitophagy by FUNDC1 knockdown or knockout abolished hypoxia-induced ROS-HIF1α upregulation. Moreover, Fundc1 TG mice developed severe hemodynamics changes and pulmonary vascular remodeling, and Fundc1 KO mice were much resistant to hypoxic PH. In addition, intraperitoneal injection of a specific FUNDC1 peptide inhibitor to block mitophagy ameliorated hypoxic PH. Our results reveal that during hypoxic PH, FUNDC1-mediated mitophagy is upregulated which activates ROS-HIF1α pathway and promotes PASMC proliferation, ultimately leads to pulmonary vascular remodeling and PH.


Asunto(s)
Hipertensión Pulmonar , Subunidad alfa del Factor 1 Inducible por Hipoxia , Proteínas de la Membrana , Proteínas Mitocondriales , Mitofagia , Animales , Proliferación Celular , Células Cultivadas , Hipertensión Pulmonar/genética , Hipertensión Pulmonar/metabolismo , Hipoxia/complicaciones , Hipoxia/metabolismo , Subunidad alfa del Factor 1 Inducible por Hipoxia/metabolismo , Proteínas de la Membrana/metabolismo , Ratones , Ratones Transgénicos , Proteínas Mitocondriales/metabolismo , Miocitos del Músculo Liso/metabolismo , Especies Reactivas de Oxígeno/metabolismo , Remodelación Vascular
18.
J Cell Mol Med ; 26(4): 1315-1326, 2022 02.
Artículo en Inglés | MEDLINE | ID: mdl-35040256

RESUMEN

Autophagy including mitophagy serves as an important regulatory mechanism in the heart to maintain the cellular homeostasis and to protect against heart damages caused by myocardial infarction (MI). The current study aims to dissect roles of general autophagy and specific mitophagy in regulating cardiac function after MI. By using Beclin1+/- , Fundc1 knockout (KO) and Fundc1 transgenic (TG) mouse models, combined with starvation and MI models, we found that Fundc1 KO caused more severe mitochondrial and cardiac dysfunction damages than Beclin1+/- after MI. Interestingly, Beclin1+/- caused notable decrease of total autophagy without detectable change to mitophagy, and Fundc1 KO markedly suppressed mitophagy but did not change the total autophagy activity. In contrast, starvation increased total autophagy without changing mitophagy while Fundc1 TG elevated total autophagy and mitophagy in mouse hearts. As a result, Fundc1 TG provided much stronger protective effects than starvation after MI. Moreover, Beclin1+/- /Fundc1 TG showed increased total autophagy and mitophagy to a level comparable to Fundc1 TG per se, and completely reversed Beclin1+/- -caused aggravation of mitochondrial and cardiac injury after MI. Our results reveal that mitophagy but not general autophagy contributes predominantly to the cardiac protective effect through regulating mitochondrial function.


Asunto(s)
Cardiopatías , Infarto del Miocardio , Animales , Proteínas de la Membrana/genética , Ratones , Mitocondrias , Proteínas Mitocondriales , Mitofagia/genética , Infarto del Miocardio/complicaciones , Infarto del Miocardio/genética
19.
Front Aging Neurosci ; 13: 765037, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34970137

RESUMEN

Background: As there is a growing concern about the cerebral embolism events secondary to non-valvular atrial fibrillation (NVAF), novel oral anticoagulant (NOAC) has been more and more widely used as an anticoagulation treatment for the prevention of stroke. However, in the face of life-threatening bleeding or emergency surgery/treatment, NOAC-related antagonists such as idarucizumab need to be urgently used to reverse the NOAC. Using recombinant tissue plasminogen activator (rt-PA) intravenous thrombolysis for acute ischemic stroke requires a time window of 4.5 h. This case reports rt-PA intravenous thrombolysis after reversal of dabigatran anticoagulation with idarucizumab in patients with acute ischemic stroke. Case Presentation: We report the case of 62-year-old Chinese female with NVAF treated with dabigatran 110 mg twice daily, and missed a dose on the eve of the stroke. The patient presented with acute ischemic stroke causing the angle of mouth deviated to right side and left limb weakness in the early morning of the next day. However, the last dosing time of dabigatran was between 24 and 48 h, the patients were given rt-PA intravenous thrombolysis after reversal of dabigatran anticoagulation with idarucizumab, while any potential relative contraindication had been excluded by means of laboratory test and CT scan in the hospitalization services. National Institute of Health stroke scale (NIHSS) score was reduced from 4 to 1, and the patient was discharged after 2 weeks. Conclusion: Our case report adds to the evidence that idarucizumab administration is safe and effective in the setting of patients with atrial fibrillation treated with dabigatran who develop acute ischemic stroke requiring rt-PA intravenous thrombolysis.

20.
Ultrason Sonochem ; 81: 105848, 2021 Nov 26.
Artículo en Inglés | MEDLINE | ID: mdl-34847449

RESUMEN

The preparation of superhydrophobic (SH) surface on stainless steel by chemical etching method is challenging due to the good corrosion resistance of the material. In this work, SH surface with water contact angle (WCA) as high as 163.21° was accomplished on 304 stainless steel surface by a rapid ultrasonic-assisted chemical etching method within 7 min and a low-cost fluorine-free modification treatment. The mechanism of ultrasonic field on the etching process was explored by detecting the cavitation and oscillation energy in the reactor. It is the first time to found that the ultrasonic cavitation effect enhanced the etching process by both chemical and physical facilitation resulting in hierarchical lamellar micro-structures, "mountain-like" micro-structure clusters and "coral-reef-like" nano-scale structures on the surface. With the ultrasonic power increasing, the ultrasonic cavitation effect not only enhanced the superhydrophobicity of sample surface, but also improved the uniformity of surface wettability. The samples also showed excellent performance of oil/water separation for various organics (all separation efficiencies up to 96%) and remarkable mechanical stability.

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