Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 231
Filtrar
1.
Neural Regen Res ; 20(6): 1816-1824, 2025 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-39104118

RESUMEN

JOURNAL/nrgr/04.03/01300535-202506000-00031/figure1/v/2024-08-05T133530Z/r/image-tiff Rab5 is a GTPase protein that is involved in intracellular membrane trafficking. It functions by binding to various effector proteins and regulating cellular responses, including the formation of transport vesicles and their fusion with the cellular membrane. Rab5 has been reported to play an important role in the development of the zebrafish embryo; however, its role in axonal regeneration in the central nervous system remains unclear. In this study, we established a zebrafish Mauthner cell model of axonal injury using single-cell electroporation and two-photon axotomy techniques. We found that overexpression of Rab5 in single Mauthner cells promoted marked axonal regeneration and increased the number of intra-axonal transport vesicles. In contrast, treatment of zebrafish larvae with the Rab kinase inhibitor CID-1067700 markedly inhibited axonal regeneration in Mauthner cells. We also found that Rab5 activated phosphatidylinositol 3-kinase (PI3K) during axonal repair of Mauthner cells and promoted the recovery of zebrafish locomotor function. Additionally, rapamycin, an inhibitor of the mechanistic target of rapamycin downstream of PI3K, markedly hindered axonal regeneration. These findings suggest that Rab5 promotes the axonal regeneration of injured zebrafish Mauthner cells by activating the PI3K signaling pathway.

2.
Plant Dis ; 2024 Jul 09.
Artículo en Inglés | MEDLINE | ID: mdl-38982675

RESUMEN

MicroRNAs (miRNAs) have been confirmed to play important roles in plant defense response. However, the key maize miRNAs involved in the defense response against Bipolaris maydis are very limited. In this study, a novel member of the miR169 family in response to B. maydis, named zma-miR169s, was discovered and investigated. The expression levels of pre-miR169s and zma-miR169s were significantly repressed during B. maydis infection. CRISPR/Cas9-induced zma-miR169s mutant exhibited more resistance against B. maydis, whereas overexpression zma-miR169s enhanced susceptibility, supporting that zma-miR169s might play a negative role in maize resistance. Moreover, RNA-seq and GO analysis showed that differentially expressed genes were highly enriched in the oxidation-reduction process and plant hormone pathway. Hence, reactive oxygen species (ROS) and plant hormone levels were further investigated. ROS detection confirmed that zma-miR169s mutant accumulated more ROS, while less ROS was detected in transgenic maize OE-miR169s. Furthermore, more remarkable changes in PR-1 expression levels and salicylic acid (SA) contents were detected in zma-miR169s mutant compared to wild-type and transgenic maize during B. maydis infection. Additionally, nuclear transcription factors (NF-YA1 and NF-YA13) were identified as targets regulated by zma-miR169s through the agrobacterium-mediated transient expression method. Overexpression of ZmNF-YA13 enhanced Arabidopsis resistance to Pseudomonas syringae pv. tomato DC3000. Taken together, our results suggest that zma-miR169s negatively regulate maize defense responses by influencing ROS accumulation and the SA-dependent signaling pathway.

3.
Sci Adv ; 10(30): eado7438, 2024 Jul 26.
Artículo en Inglés | MEDLINE | ID: mdl-39047093

RESUMEN

Designing highly efficient orally administrated nanotherapeutics with specific inflammatory site-targeting functions in the gastrointestinal tract for ulcerative colitis (UC) management is a noteworthy challenge. Here, we focused on exploring a specific targeting oral nanotherapy, serving as "one stone," for the directed localization of inflammation and the regulation of redox homeostasis, thereby achieving effects against "two birds" for UC treatment. Our designed nanotherapeutic agent OPNs@LMWH (oxidation-sensitive ε-polylysine nanoparticles at low-molecular weight heparin) exhibited specific active targeting effects and therapeutic efficacy simultaneously. Our results indicate that OPNs@LMWH had high integrin αM-mediated immune cellular uptake efficiency and preferentially accumulated in inflamed tissues. We also confirmed its effectiveness in the treatment experiment of colitis in mice by ameliorating oxidative stress and inhibiting the activation of inflammation-associated signaling pathways while simultaneously bolstering the protective mechanisms of the colonic epithelium. Overall, these findings underscore the compelling dual functionalities of OPNs@LMWH, which enable effective oral delivery to inflamed sites, thereby facilitating precise UC management.


Asunto(s)
Colitis Ulcerosa , Homeostasis , Integrinas , Nanopartículas , Oxidación-Reducción , Animales , Ratones , Colitis Ulcerosa/tratamiento farmacológico , Colitis Ulcerosa/metabolismo , Nanopartículas/química , Administración Oral , Integrinas/metabolismo , Estrés Oxidativo/efectos de los fármacos , Humanos , Modelos Animales de Enfermedad , Sistemas de Liberación de Medicamentos
4.
BMC Public Health ; 24(1): 1818, 2024 Jul 08.
Artículo en Inglés | MEDLINE | ID: mdl-38978025

RESUMEN

BACKGROUND: As an innovative lipid parameter, NHHR (the ratio of non-high-density lipoprotein cholesterol to high-density lipoprotein cholesterol) can serve as a valuable tool for assessing cardiovascular disease risk. Nevertheless, the relationship between NHHR and the risk of kidney stones remains unexplored. METHODS: A cross-sectional survey utilized data from the National Health and Population Survey (NHANES) database in the United States spanning from 2007 to 2018. Distinct statistical analyses were applied, including weighted logistic regression, stratified and interaction analysis and restricted cubic spline curve (RCS) models, to examine the correlation between NHHR and the incidence of kidney stones. RESULTS: This analysis encompassed 24,664 participants, with 9.63% reporting incidents of kidney stones. Following multivariate logistic regression and comprehensive adjustments, participants in NHHR quartile 4 (OR 1.34; 95% CI 1.12, 1.60, P < 0.01) exhibited a significantly increased risk of kidney stones compared to those in NHHR quartile 1 (Q1). The RCS result further illustrated a non-linear correlation between NHHR and the incidence of kidney stones. The result of subgroup analysis manifested that participants without diabetes had a higher risk of kidney stones when measured high NHHR levels compared those with diabetes (p for interaction < 0.05). CONCLUSION: Elevated NHHR levels were found to be associated with an increased risk of kidney stones. Based on these findings, NHHR appears to be a promising predictive indicator for the occurrence of kidney stones.


Asunto(s)
HDL-Colesterol , Cálculos Renales , Encuestas Nutricionales , Humanos , Cálculos Renales/epidemiología , Cálculos Renales/sangre , Estudios Transversales , Masculino , Femenino , Persona de Mediana Edad , Estados Unidos/epidemiología , Adulto , HDL-Colesterol/sangre , Factores de Riesgo , Incidencia , Anciano , Colesterol/sangre
5.
Hematol Oncol ; 42(4): e3279, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38819002

RESUMEN

Diffuse large B-cell lymphoma (DLBCL) is a biologically and clinically heterogeneous disease that requires personalized clinical treatment. Assigning patients to different risk categories and cytogenetic abnormality and genetic mutation groups has been widely applied for prognostic stratification of DLBCL. Increasing evidence has demonstrated that dysregulated metabolic processes contribute to the initiation and progression of DLBCL. Metabolic competition within the tumor microenvironment is also known to influence immune cell metabolism. However, metabolism- and immune-related stratification has not been established. Here, 1660 genes involved in 84 metabolic pathways were selected and tested to establish metabolic clusters (MECs) of DLBCL. MECs established based on independent lymphoma datasets distinguished different survival outcomes. The CIBERSORT algorithm and EcoTyper were applied to quantify the relative abundance of immune cell types and identify variation in cell states for 13 lineages comprising the tumor micro environment among different MECs, respectively. Functional characterization showed that MECs were an indicator of the immune microenvironment and correlated with distinctive mutational characteristics and oncogenic signaling pathways. The novel immune-related MECs exhibited promising clinical prognostic value and potential for informing DLBCL treatment decisions.


Asunto(s)
Linfoma de Células B Grandes Difuso , Redes y Vías Metabólicas , Microambiente Tumoral , Linfoma de Células B Grandes Difuso/metabolismo , Linfoma de Células B Grandes Difuso/patología , Linfoma de Células B Grandes Difuso/genética , Linfoma de Células B Grandes Difuso/mortalidad , Humanos , Pronóstico , Biomarcadores de Tumor/metabolismo , Femenino , Masculino , Perfilación de la Expresión Génica , Mutación
6.
World J Gastrointest Surg ; 16(5): 1449-1460, 2024 May 27.
Artículo en Inglés | MEDLINE | ID: mdl-38817298

RESUMEN

BACKGROUND: Neuroendocrine carcinoma (NEC) of the extrahepatic bile duct is very rare, and the treatment and prognosis are unclear. Herein, we report the case of a middle-aged female with primary large cell NEC (LCNEC) of the common hepatic duct combined with distal cholangiocarcinoma (dCCA). Additionally, after a review of the relevant literature, we summarize and compare mixed neuroendocrine-non-neuroendocrine neoplasm (MiNEN) and pure NEC to provide a reference for selecting the appropriate treatment and predicting the prognosis of this rare disease. CASE SUMMARY: A 62-year-old female presented to the hospital due to recurrent abdominal pain for 2 months. Physical examination showed mild tenderness in the upper abdomen and a positive Courvoisier sign. Blood tests showed elevated liver transaminase and carbohydrate antigen 199 levels. Imaging examination revealed a 1-cm tumour in the middle and lower segments of the common bile duct. Pancreaticoduodenectomy + lymph node dissection was performed, and hepatic duct tumours were unexpectedly found during surgery. Pathology suggested poorly differentiated LCNEC (approximately 0.5 cm × 0.5 cm × 0.4 cm), Ki-67 (50%), synaptophysin+, and chromogranin A+. dCCA pathology suggested moderately differentiated adenocarcinoma. The patient eventually developed lymph node metastasis in the liver, bone, peritoneum, and abdominal cavity and died 24 months after surgery. Gene sequencing methods were used to compare gene mutations in the two primary bile duct tumours. CONCLUSION: The prognosis of MiNEN and pure NEC alone is different, and the selection of treatment options needs to be differentiated.

7.
J Cell Mol Med ; 28(8): e18285, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38597406

RESUMEN

Microglial polarization and associated inflammatory activity are the key mediators of depression pathogenesis. The natural Smilax glabra rhizomilax derivative engeletin has been reported to exhibit robust anti-inflammatory activity, but no studies to date have examined the mechanisms through which it can treat depressive symptoms. We showed that treatment for 21 days with engeletin significantly alleviated depressive-like behaviours in chronic stress social defeat stress (CSDS) model mice. T1-weighted imaging (T1WI), T2-weighted imaging (T2WI) imaging revealed no significant differences between groups, but the bilateral prefrontal cortex of CSDS mice exhibited significant increases in apparent diffusion coefficient and T2 values relative to normal control mice, with a corresponding reduction in fractional anisotropy, while engeletin reversed all of these changes. CSDS resulted in higher levels of IL-1ß, IL-6, and TNF-a production, enhanced microglial activation, and greater M1 polarization with a concomitant decrease in M2 polarization in the mPFC, whereas engeletin treatment effectively abrogated these CSDS-related pathological changes. Engeletin was further found to suppress the LCN2/C-X-C motif chemokine ligand 10 (CXCL10) signalling axis such that adeno-associated virus-induced LCN2 overexpression ablated the antidepressant effects of engeletin and reversed its beneficial effects on the M1/M2 polarization of microglia. In conclusion, engeletin can alleviate CSDS-induced depressive-like behaviours by regulating the LCN2/CXCL10 pathway and thereby altering the polarization of microglia. These data suggest that the antidepressant effects of engeletin are correlated with the polarization of microglia, highlighting a potential avenue for future design of antidepressant strategies that specifically target the microglia.


Asunto(s)
Antidepresivos , Flavonoles , Glicósidos , Microglía , Ratones , Animales , Microglía/metabolismo , Antidepresivos/farmacología , Antidepresivos/uso terapéutico , Depresión/tratamiento farmacológico , Depresión/etiología , Transducción de Señal
8.
Cancer Res ; 84(13): 2123-2140, 2024 Jul 02.
Artículo en Inglés | MEDLINE | ID: mdl-38635903

RESUMEN

Recurrent abnormalities in immune surveillance-related genes affect the progression of diffuse large B-cell lymphoma (DLBCL) and modulate the response to therapeutic interventions. CD58 interacts with the CD2 receptor on T cells and NK cells and is recurrently mutated and deleted in DLBCL, suggesting that it may play a role in regulating antitumor immunity. In this study, we comprehensively analyzed the genomic characteristics of CD58 through targeted next-generation sequencing, RNA sequencing (RNA-seq), whole-exome sequencing, and single-cell RNA-seq in patients with newly diagnosed DLBCL. The CD58 mutation rate was 9.1%, and the copy number loss rate was 44.7% among all enrolled patients with DLBCL. Notably, CD58 genetic alterations, along with low CD58 expression, significantly correlated with reduced rates of response to R-CHOP therapy and inferior progression-free survival and overall survival. Single-cell RNA-seq revealed that CD58 expression in tumor cells was negatively correlated with CD8+ T-cell exhaustion/dysfunction status. Insufficient T-cell activation resulting from CD58 alterations could not be attributed solely to CD2 signaling. CD58 inhibited the activity of the JAK2/STAT1 pathway by activating the LYN/CD22/SH2 domain-containing phosphatase 1 (SHP1) axis, thereby limiting PDL1 and IDO expression. Elevated PDL1 and IDO expression in CD58-deficient DLBCL cells led to immune evasion and tumor-intrinsic resistance to chimeric antigen receptor T-cell therapy. Direct activation of CD58-CD2 costimulatory signaling in combination with anti-PDL1 blockade or IDO inhibitor sensitized CD58-deficient DLBCL to chimeric antigen receptor T-cell therapy. Collectively, this work identified the multiple roles of CD58 in regulating antitumor immune responses in DLBCL. Significance: Loss of CD58 mediates immune evasion and therapy resistance in diffuse large B-cell lymphoma by upregulating PDL1 and IDO through LYN/CD22/SHP1 signaling, providing potential targets and therapeutic strategies to improve patient treatment.


Asunto(s)
Antígeno B7-H1 , Antígenos CD58 , Indolamina-Pirrol 2,3,-Dioxigenasa , Linfoma de Células B Grandes Difuso , Humanos , Linfoma de Células B Grandes Difuso/inmunología , Linfoma de Células B Grandes Difuso/genética , Linfoma de Células B Grandes Difuso/patología , Antígeno B7-H1/genética , Antígeno B7-H1/metabolismo , Indolamina-Pirrol 2,3,-Dioxigenasa/genética , Indolamina-Pirrol 2,3,-Dioxigenasa/metabolismo , Antígenos CD58/genética , Antígenos CD58/metabolismo , Femenino , Masculino , Mutación , Animales , Persona de Mediana Edad , Ratones , Línea Celular Tumoral , Anciano
9.
J Genet Genomics ; 51(9): 911-921, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-38582297

RESUMEN

MicroRNAs (miRNAs) play a significant role in axon regeneration following spinal cord injury. However, the functions of numerous miRNAs in axon regeneration within the central nervous system (CNS) remain largely unexplored. Here, we elucidate the positive role of microRNA-2184 (miR-2184) in axon regeneration within zebrafish Mauthner cells (M-cells). The upregulation of miR-2184 in a single M-cell can facilitate axon regeneration, while the specific sponge-induced silencing of miR-2184 leads to impeded regeneration. We show that syt3, a downstream target of miR-2184, negatively regulates axon regeneration, and the regeneration suppression modulated by syt3 depends on its binding to Ca2+. Furthermore, pharmacological stimulation of the cAMP/PKA pathway suggests that changes in the readily releasable pool may affect axon regeneration. Our data indicate that miR-2184 promotes axon regeneration of M-cells within the CNS by modulating the downstream target syt3, providing valuable insights into potential therapeutic strategies.


Asunto(s)
Axones , MicroARNs , Regeneración Nerviosa , Sinaptotagminas , Proteínas de Pez Cebra , Animales , Axones/metabolismo , Axones/fisiología , Calcio/metabolismo , MicroARNs/genética , MicroARNs/metabolismo , Traumatismos de la Médula Espinal/genética , Traumatismos de la Médula Espinal/metabolismo , Traumatismos de la Médula Espinal/patología , Sinaptotagminas/genética , Sinaptotagminas/metabolismo , Pez Cebra/genética , Proteínas de Pez Cebra/genética , Proteínas de Pez Cebra/metabolismo
11.
Artículo en Inglés | MEDLINE | ID: mdl-38465433

RESUMEN

INTRODUCTION: Lenvatinib resistance causes less than 40% of the objective response rate. Therefore, it is urgent to explore new therapeutic targets to reverse the lenvatinib resistance for HCC. HAND2-AS1 is a critical tumor suppressor gene in various cancers. METHODS: Here, we investigated the role of HAND2-AS1 in the molecular mechanism of lenvatinib resistance in HCC. It was found that HAND2-AS1 was lowly expressed in the HepG2 lenvatinib resistance (HepG2-LR) cells and HCC tissues and associated with progression-free intervals via TCGA. Overexpression of HAND2-AS1 (OE-HAND2-AS1) decreased the IC50 of lenvatinib in HepG2-LR cells to reverse lenvatinib resistance. Moreover, OE-HAND2-AS1 induced intracellular concentrations of malondialdehyde (MDA) and lipid ROS and decreased the ratio of glutathione to glutathione disulfide (GSH/GSSG) to promote ferroptosis. RESULTS: A xenograft model in which nude mice were injected with OE-HAND2-AS1 HepG2-LR cells confirmed that OE-HAND2-AS1 could reverse lenvatinib resistance and decrease tumor formation in vivo. HAND2-AS1 promoted the expression of ferroptosis-related genes (TLR4, NOX2, and DUOX2) and promoted ferroptosis to reverse lenvatinib resistance by increasing TLR4/ NOX2/DUOX2 via competing endogenous miR-219a-1-3p in HCC cells. Besides, patients with a low HAND2-AS1 level had early recurrence after resection. CONCLUSION: These findings suggested that HAND2-AS1 may be a potential therapeutic target and an indicator of early recurrence for HCC.

12.
Exp Neurol ; 374: 114715, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38325655

RESUMEN

Effective axon regeneration within the central nervous system (CNS) is pivotal for achieving functional recovery following spinal cord injury (SCI). Numerous extrinsic and intrinsic factors exert influences on the axon regeneration. While prior studies have demonstrated crucial involvement of specific members the Rab protein family in axon regeneration in the peripheral nervous system (PNS), the precise function of Rab11 in CNS axon regeneration in vivo remains elusive. Thus, our study aimed to elucidate the impact of Rab11 on the axon regeneration of Mauthner cells (M-cells) in zebrafish larvae. Our findings demonstrated that overexpression of Rab11bb via single-cell electroporation significantly promoted axon regeneration in individual M-cells. Conversely, knockdown of Rab11bb inhibited the axon regeneration of M-cells. RNA-seq analysis revealed an upregulation of ntng2b following Rab11bb overexpression. As we hypothesized, overexpression of Ntng2b markedly enhanced axon regeneration, while Ntng2b knockdown in the context of Rab11bb pro-regeneration substantially hindered axon regrowth. In conclusion, our study demonstrated that Rab11 promotes axon regeneration of single M-cell in the CNS through the Rab11/axon guidance/Ntng2b pathway.


Asunto(s)
Axones , Traumatismos de la Médula Espinal , Animales , Axones/fisiología , Pez Cebra , Orientación del Axón , Regeneración Nerviosa
13.
Cell Mol Life Sci ; 81(1): 104, 2024 Feb 27.
Artículo en Inglés | MEDLINE | ID: mdl-38411738

RESUMEN

MicroRNA (miRNA), functioning as a post-transcriptional regulatory element, plays a significant role in numerous regulatory mechanisms and serves as a crucial intrinsic factor influencing axon regeneration. Prior investigations have elucidated the involvement of miRNA-9 in various processes, however, its specific contribution to axon regeneration in the central nervous system (CNS) remains uncertain. Hence, the zebrafish Mauthner axon regeneration model was employed to manipulate the expression of miRNA-9 in single cells, revealing that upregulation of miRNA-9 facilitated axon regeneration. Additionally, her6, a downstream target gene of miRNA-9, was identified as a novel gene associated with axon regeneration. Suppression of her6 resulted in enhanced Mauthner axon regeneration, as evidenced by the significantly improved regenerative capacity observed in her6 knockout zebrafish. In addition, modulation of her6 expression affects intracellular calcium levels in neurons and promoting her6 expression leads to a decrease in calcium levels in vivo using the new NEMOf calcium indicator. Moreover, the administration of the neural activity activator, pentylenetetrazol (PTZ) partially compensated for the inhibitory effect of her6 overexpression on the calcium level and promoted axon regeneration. Taken together, our study revealed a role for miRNA-9 in the process of axon regeneration in the CNS, which improved intracellular calcium activity and promoted axon regeneration by inhibiting the expression of downstream target gene her6. In our study, miRNA-9 emerged as a novel and intriguing target in the intricate regulation of axon regeneration and offered compelling evidence for the intricate relationship between calcium activity and the facilitation of axon regeneration.


Asunto(s)
Calcio , MicroARNs , Animales , Pez Cebra/genética , Axones , Regeneración Nerviosa/genética , MicroARNs/genética
14.
Int Immunopharmacol ; 128: 111550, 2024 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-38232536

RESUMEN

Cytosolic DNA activates the STING (stimulator of interferon genes) signaling pathway to trigger interferon and inflammatory responses that protect against microbial infections and cancer. However, Aicardi-Goutières syndrome (AGS) persistently activates the STING signaling pathway, which can lead to severe autoimmune diseases. We demonstrate herein that Licochalcone B (LicoB), the main component of traditional licorice, is an inhibitor of the STING signaling pathway. We observed that LicoB inhibited the activation of the STING signaling pathway in macrophages. Mechanically, LicoB affected the STING-TBK1-IRF3 signal axis and inhibited the activation of the STING downstream signaling pathway. Furthermore, LicoB inhibited the increase in type I interferon levels in mice induced by the STING agonist CMA. LicoB significantly reduced systemic inflammation in Trex1-/- mice. Our results show that LicoB, a STING signaling pathway inhibitor, is a promising candidate for the treatment of diseases related to STING signaling pathway activation.


Asunto(s)
Enfermedades Autoinmunes , Interferón Tipo I , Ratones , Animales , Autoinmunidad , Nucleotidiltransferasas/metabolismo , Transducción de Señal
15.
Hepatology ; 79(2): 425-437, 2024 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-37611260

RESUMEN

BACKGROUND AND AIMS: The predominantly progressive, indeterminate, and predominantly regressive (P-I-R) classification extends beyond staging and provides information on dynamic changes of liver fibrosis. However, the prognostic implication of P-I-R classification is not elucidated. Therefore, in the present research, we investigated the utility of P-I-R classification in predicting the on-treatment clinical outcomes. APPROACH AND RESULTS: In an extension study on a randomized controlled trial, we originally enrolled 1000 patients with chronic hepatitis B and biopsy-proven histological significant fibrosis, and treated them for more than 7 years with entecavir-based therapy. Among the 727 patients with a second biopsy at treatment week 72, we compared P-I-R classification and Ishak score changes in 646 patients with adequate liver sections for the histological evaluation. Progressive, indeterminate, and regressive cases were observed in 70%, 17%, and 13% of patients before treatments and 20%, 14%, and 64% after 72-week treatment, respectively, which could further differentiate the histological outcomes of patients with stable Ishak scores. The 7-year cumulative incidence of HCC was 1.5% for the regressive cases, 4.3% for the indeterminate cases, and 22.8% for the progressive cases ( p <0.001). After adjusting for age, treatment regimen, platelet counts, cirrhosis, Ishak fibrosis score changes, and Laennec staging, the posttreatment progressive had a HR of 17.77 (vs. posttreatment regressive; 95% CI: 5.55-56.88) for the incidence of liver-related events (decompensation, HCC, and death/liver transplantation). CONCLUSIONS: The P-I-R classification can be a meaningful complement to the Ishak fibrosis score not only in evaluating the histological changes but also in predicting the clinical outcomes.


Asunto(s)
Carcinoma Hepatocelular , Hepatitis B Crónica , Neoplasias Hepáticas , Humanos , Carcinoma Hepatocelular/patología , Antivirales/uso terapéutico , Neoplasias Hepáticas/patología , Cirrosis Hepática/patología , Hígado/patología , Hepatitis B Crónica/complicaciones , Hepatitis B Crónica/tratamiento farmacológico , Hepatitis B Crónica/patología , Fibrosis , Biopsia/efectos adversos
16.
J Mol Cell Cardiol ; 186: 57-70, 2024 01.
Artículo en Inglés | MEDLINE | ID: mdl-37984156

RESUMEN

BACKGROUND: Macrophage-derived foam cells are a hallmark of atherosclerosis. Scavenger receptors, including lectin-like oxidized low-density lipoprotein (LDL) receptor-1 (OLR-1), are the principal receptors responsible for the uptake and modification of LDL, facilitating macrophage lipid load and the uptake of oxidized LDL by arterial wall cells. Krüppel-like factor 15 (KLF15) is a transcription factor that regulates the expression of genes by binding to the promoter during transcription. Therefore, this study aimed to investigate the precise role of macrophage KLF15 in atherogenesis. METHODS: We used two murine models of atherosclerosis: mice injected with an adeno-associated virus (AAV) encoding the Asp374-to-Tyr mutant version of human PCSK9, followed by 12 weeks on a high-fat diet (HFD), and ApoE-/-- mice on a HFD. We subsequently injected mice with AAV-KLF15 and AAV-LacZ to assess the role of KLF15 in the development of atherosclerosis in vivo. Oil Red O, H&E, and Masson's trichome staining were used to evaluate atherosclerotic lesions. Western blots and RT-qPCR were used to assess protein and mRNA levels, respectively. RESULTS: We determined that KLF15 expression was downregulated during atherosclerosis formation, and KLF15 overexpression prevented atherosclerosis progression. KLF15 expression levels did not affect body weight or serum lipid levels in mice. However, KLF15 overexpression in macrophages prevented foam cell formation by reducing OLR-1-meditated lipid uptake. KLF15 directly targeted and transcriptionally downregulated OLR-1 levels. Restoration of OLR-1 reversed the beneficial effects of KLF15 in atherosclerosis. CONCLUSION: Macrophage KLF15 transcriptionally downregulated OLR-1 expression to reduce lipid uptake, thereby preventing foam cell formation and atherosclerosis. Thus, our results suggest that KLF15 is a potential therapeutic target for atherosclerosis.


Asunto(s)
Aterosclerosis , Células Espumosas , Humanos , Ratones , Animales , Células Espumosas/metabolismo , Proproteína Convertasa 9/metabolismo , Macrófagos/metabolismo , Aterosclerosis/patología , Lipoproteínas LDL/metabolismo , Factores de Transcripción de Tipo Kruppel/genética , Factores de Transcripción de Tipo Kruppel/metabolismo
17.
J Nat Med ; 78(2): 285-295, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38082192

RESUMEN

The natural product Honokiol exhibits robust antitumor activity against a range of cancers, and it has also received approval to undergo phase I clinical trial testing. We confrmed that honokiol can promote the apoptotic death of tumor cells through cell experiments. Then siRNA constructs specific for PIAS3, PIAS3 overexpression plasmid and the mutation of the STAT3 Tyr705 residue were used to confirm the mechanism of Honokiol-induced apoptosis. Finally, we confrmed that honokiol can promote PIAS3 upregulation, in turn suppressing STAT3 Tyr705 phosphorylation through the in vivo and in vitro experiments. Honokiol was ultimately found to reduce tumor cell viability by promoting apoptosis through a mechanism dependent on the ability of Honokiol to promote PIAS3 upregulation and the selective inhibition of p-STAT3 (Tyr705) without affecting p-STAT3 (Ser727) or p-STAT1 (Tyr701) levels. PIAS3 knockdown and overexpression in tumor cells altered STAT3 activation and associated DNA binding activity through the control of Tyr705 phosphorylation via PIAS3-STAT3 complex formation, ultimately shaping Honokiol-induced tumor cell apoptosis. Honokiol was also confirmed to significantly prolong the survival of mice bearing xenograft tumors in a PIAS3-dependent fashion. Together, these findings highlight a novel pathway through which Honokiol can promote PIAS3 upregulation, in turn suppressing STAT3 Tyr705 phosphorylation and promoting the apoptotic death of tumor cells.


Asunto(s)
Compuestos Alílicos , Apoptosis , Compuestos de Bifenilo , Fenoles , Tirosina , Humanos , Animales , Ratones , Fosforilación , Regulación hacia Arriba , Línea Celular Tumoral , Chaperonas Moleculares/genética , Chaperonas Moleculares/metabolismo , Proteínas Inhibidoras de STAT Activados/genética , Proteínas Inhibidoras de STAT Activados/metabolismo , Factor de Transcripción STAT3/genética , Factor de Transcripción STAT3/metabolismo
18.
J Ethnopharmacol ; 321: 117406, 2024 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-37952733

RESUMEN

ETHNOPHARMACOLOGICAL RELEVANCE: Liuweiwuling Tablet (LWWL) is a patented Chinese medicine approved by the Chinese National Medical Products Administration (NMPA). Clinically, it is used to treat a range of liver diseases that precede hepatocellular carcinoma (HCC), including hepatitis, liver fibrosis and cirrhosis. LWWL is hypothesized to inhibit the inflammatory transformation of HCC, which may have a positive impact on the prevention and treatment of HCC. However, its exact mechanism of action remains unknown. AIM OF THE STUDY: To investigate how LWWL is effective in the treatment of HCC and to validate the pathways involved in this process. MATERIALS AND METHODS: An in vivo model of HCC induced by diethylnitrosamine (DEN) was established to study the effect of LWWL on the development of HCC. The rat serum was analyzed for aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), and gamma-glutamyl transpeptidase (γ-GT). The rat liver tissues were stained with hematoxylin and eosin (HE) and Masson's trichrome for pathological analysis. Rat liver tissue was subjected to transcriptome sequencing. Expression of inflammatory and liver fibrosis-related factors in bone marrow-derived macrophages (BMDMs) and LX-2 cells was detected by QRT-PCR, ELISA and Western blot (WB). The expression of apoptosis and stemness genes in HepG2 and Huh7 cells was assessed through flow cytometry and QRT-PCR. Transcriptomics, network pharmacology, WB, and QRT-PCR were employed to validate the mechanisms associated with the amelioration of HCC development by LWWL. RESULTS: LWWL significantly reduced the severity of hepatitis and liver fibrosis, the expression of tumor stemness genes, and the incidence of HCC. In addition, LWWL inhibited the release of inflammatory substances and nuclear accumulation of P65 protein in BMDMs as well as the conversion of LX-2 cells to fibroblasts. LWWL inhibited the proliferation of HepG2 and Huh7 cells, including the initiation of apoptosis and the reduction of stemness gene expression. Importantly, LWWL regulates the PI3K/AKT/NF-κB pathway, which affects hepatic inflammation and cancer progression. CONCLUSION: LWWL inhibited the occurrence and development of HCC by modulating the severity of hepatitis and liver fibrosis, indicating the potential clinical relevance of LWWL in preventing and treating HCC.


Asunto(s)
Carcinoma Hepatocelular , Hepatitis , Neoplasias Hepáticas , Ratas , Animales , Carcinoma Hepatocelular/metabolismo , FN-kappa B/metabolismo , Proteínas Proto-Oncogénicas c-akt/metabolismo , Fosfatidilinositol 3-Quinasas/metabolismo , Neoplasias Hepáticas/metabolismo , Transducción de Señal , Cirrosis Hepática/metabolismo , Comprimidos
19.
Artículo en Chino | WPRIM (Pacífico Occidental) | ID: wpr-1018357

RESUMEN

Objective To observe the effects of abdominal penetrating moxibustion combined with acupuncture at the"four chong points"on balance,walking function and trunk control in patients recovering from stroke.Methods Seventy-eight patients recovering from stroke were randomly divided into an observation group and a control group,with 39 patients in each group.The control group was given conventional rehabilitation exercises,while the observation group was given abdominal penetrating moxibustion combined with acupuncture at the"four chong points"on the basis of the control group.Both groups were treated for 2 consecutive months.After 2 months of treatment,the clinical efficacy of the two groups was evaluated,and the changes in the Berg Scale score and the Timed Up and Go Test(TUGT)were observed before and after treatment.The changes in the National Institutes of Health Stroke Scale(NIHSS)scores were compared before and after treatment between the two groups.The Sheikh Trunk Control Scale scores were also evaluated.Results(1)The total effective rate of the observation group was 94.87%(37/39),and the total effective rate of the control group was 80.00%(31/39),and the efficacy of the observation group was superior to that of the control group,and the difference was statistically significant(P<0.05).(2)After treatment,the Berg scores of the patients in the two groups were significantly increased(P<0.05),and the Berg scores of the observation group were higher than those of the control group,and the difference was statistically significant(P<0.05).(3)After treatment,the TUGT time and NIHSS score of patients in the two groups were significantly improved(P<0.05),and the TUGT time of the observation group was shorter than that of the control group,and the NIHSS score was lower than that of the control group,and the difference was statistically significant(P<0.05).(4)After treatment,the Sheikh trunk control scores of the two groups were significantly increased(P<0.05),and the Sheikh trunk control score of the observation group was higher than that of the control group,and the difference was statistically significant(P<0.05).Conclusion Abdominal penetrating moxibustion method combined with acupuncture at the four chong points for the treatment of stroke recovery can effectively restore the patients'balance and walking function,improve the patients'trunk control ability,and the therapeutic effect is precise.

20.
Artículo en Chino | WPRIM (Pacífico Occidental) | ID: wpr-1036362

RESUMEN

Objective @#To establish an in vitro renal injury model of amikacin (AKN) and investigate the protective effect and mechanism of vaccarin (VA) in the AKN-induced in vitro renal injury model .@*Methods @#Human renal tubular epithelial cells (HK-2) were cultured in vitro and incubated with different drugs of AKN or/and VA to de- termine the optimal drug concentration based on cell viability tested by MTT. The changes in intracellular oxidative stress were assessed using the dihydroethidium ( DHE) probe and malondialdehyde ( MDA) /glutathione ( GSH) assay kits at different time points . Total RNA was extracted , and RT-qPCR was performed to detect the changes in the gene expression of kidney injury molecule-1 ( KIM-1) and neutropil gelatinase-associated lipocalin ( NGAL) . Western blot analysis was performed to detect the levels of ferroptosis-related markers solute carrier family 7 member 11 (SLC7A11) and glutathione peroxidase 4 (GPX4) in HK-2 cell lysis .@*Results @#High concentrations of AKN significantly decreased the viability of HK-2 cells in vitro , with a half maximal inhibitory concentration (IC50) of (5 . 74 ±0. 47) mmol/L. VA at concentrations of 25 - 100 μmol/L increased the viability of AKN-stimulated HK- 2 cells (P < 0. 05) . After treatment with AKN (4 mmol/L) , the mRNA expression levels of KIM-1 and NGAL were significantly higher than those of the negative control (NC) group ( P < 0. 001) . VA (50 μmol/L) significantly reduced the mRNA expression levels of KIM-1 (P < 0. 01) and NGAL (P < 0. 05) . The intensity of DHE staining increased after 3 hours of AKN treatment , but the difference was not statistically significant. However , the intensity of DHE staining was significantly higher in the 6 - 24 hours group compared to the 0 - hour group (P < 0. 01) . Furthermore , MDA levels significantly increased , while GSH levels significantly decreased after 6 - 24 hours of AKN treatment , with statistically significant differences (P < 0. 05) . After 6 - 24 hours of AKN stimula- tion , the ferroptosis-related proteins SLC7A11 and GPX4 both significantly decreased (P < 0. 001) . Co-incubation with VA for 24 hours effectively reversed the changes in DHE staining , MDA and GSH levels , as well as the chan- ges of SLC7A11 and GPX4 protein levels (P < 0. 001) .@*Conclusion @#In this study , an in vitro renal injury model was established by stimulating HK-2 cells with high concentrations of AKN , and it was found that VA might allevi- ate the damage to renal tubular cells caused by AKN via inhibiting oxidative stress related ferroptosis .

SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA