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1.
Heliyon ; 10(15): e35478, 2024 Aug 15.
Artículo en Inglés | MEDLINE | ID: mdl-39170307

RESUMEN

Tympanojugular paragangliomas (TJP) originate from the parasympathetic ganglia in the lateral base of the skull. Although the cellular composition and oncogenic mechanisms of paragangliomas have been evaluated, a comprehensive transcriptomic atlas specific to TJP remains to be established to facilitate further investigations. In this study, single-cell RNA sequencing and whole-exome sequencing were conducted on six surgically excised TJP samples to determine their cellular composition and intratumoral heterogeneity. Fibroblasts were sub-classified into two distinct groups: myofibroblasts and fibroblasts associated with bone remodeling. Additionally, an elaborate regulatory and cell-cell communication network was determined, highlighting the multifaceted role of fibroblasts, which varies depending on expression transitions. The Kit receptor (KIT) signaling pathway mediated interactions between fibroblasts and mast cells, whereas robust connections with endothelial and Schwann cell-like cells were facilitated through the platelet-derived growth factor signaling pathway. These findings establish a foundation for studying the mechanisms underlying protumor angiogenesis and the specific contributions of fibroblasts within the TJP microenvironment. IL6 signaling pathway of fibroblasts interacting with macrophages and endothelial cells may be involved in tumor regrowth. These results enhance our understanding of fibroblast functionality and provide a resource for future therapeutic targeting of TJP.

2.
Artículo en Chino | MEDLINE | ID: mdl-39193734

RESUMEN

Objective:To explore the gene expression characteristics of endothelial cells and fibroblasts in the microenvironment of SDHD-mutated carotid body tumors(SDHD-CBT), to fine the functional enrichment of each subcluster, and to further explore the network of cell-cell interactions in the microenvironment of SDHD-CBT. Methods:The bioinformatics analysis was used to download and reanalyze the single-nuclear RNA sequencing data of SDHD-CBT, SDHB mutated thoracic and abdominal paraganglioma(SDHB-ATPGL), SDHB-CBT, and normal adrenal medulla(NAM), to clarify the information of cell populations of the samples. We focused on exploring the gene expression profiles of endothelial cells and fibroblasts subclusters, and performed functional enrichment analysis based on Gene Ontology(GO) resources. CellChat was used to compare the cell-cell interactions networks of different clinical samples and predict significant signaling pathways in SDHD-CBT. Results:A total of 7 cell populations were profiled. The main subtypes of endothelial cells in SDHD-CBT are arterial and venous endothelial cells, and the main subtypes of fibroblasts are myofibroblasts and pericytes. Compared to NAM, SDHB-CBT and SDHB-ATPGL, cell communication involving endothelial cells and fibroblasts in SDHD-CBT is more abundant, with significant enrichment in pathways such as FGF, PTN, WNT, PROS, PERIOSTIN, and TGFb. Conclusion:Endothelial cells and fibroblasts in SDHD-CBT are heterogeneous and involved in important cellular interactionprocesses, in which the discovery of FGF,PTN,WNT,PROS,PERIOSTIN and TGFb signals may play an important role in the regulation of microenvironment of SDHD-CBT.


Asunto(s)
Células Endoteliales , Fibroblastos , Microambiente Tumoral , Humanos , Células Endoteliales/metabolismo , Fibroblastos/metabolismo , Tumor del Cuerpo Carotídeo/metabolismo , Tumor del Cuerpo Carotídeo/genética , Tumor del Cuerpo Carotídeo/patología , Transducción de Señal , Succinato Deshidrogenasa/metabolismo , Succinato Deshidrogenasa/genética , Biología Computacional/métodos , Paraganglioma/genética , Paraganglioma/patología , Paraganglioma/metabolismo , Comunicación Celular , Mutación , Moléculas de Adhesión Celular/metabolismo , Moléculas de Adhesión Celular/genética
3.
Artículo en Chino | MEDLINE | ID: mdl-39193740

RESUMEN

This article systematically reviewed the pathological features, molecular mechanisms, and tumor microenvironment of head and neck paraganglioma(HNPGL), with a focus on pseudohypoxic HNPGL. It was demonstrated that pseudohypoxic HNPGL mainly involves multiple gene mutations, such as SDHx and VHL/EPAS1, which affect the stability and activity of HIF protein and exacerbate the development of the tumor. Meanwhile, the paper also analyzed the expression patterns of HIF-1α and HIF-2α in HNPGL, and found that differences in HIF activation may have an impact on the therapeutic response of specific subtypes. In addition, the paper explored the tumor microenvironment of HNPGL and found that immune cells such as macrophages, CD4⁺T cells, and CD8⁺T cells play an important role in the tumor, and the heterogeneity of the immune microenvironment also affects the choice of therapeutic approaches and responsiveness. Through comprehensive analysis, these findings not only contribute to a deeper understanding of the pathogenesis and developmental process of HNPGL, but also provide clues for future personalized treatments for specific subtypes.


Asunto(s)
Neoplasias de Cabeza y Cuello , Subunidad alfa del Factor 1 Inducible por Hipoxia , Paraganglioma , Microambiente Tumoral , Humanos , Microambiente Tumoral/inmunología , Neoplasias de Cabeza y Cuello/metabolismo , Neoplasias de Cabeza y Cuello/inmunología , Subunidad alfa del Factor 1 Inducible por Hipoxia/metabolismo , Paraganglioma/metabolismo , Paraganglioma/inmunología , Factores de Transcripción con Motivo Hélice-Asa-Hélice Básico/metabolismo , Mutación , Proteína Supresora de Tumores del Síndrome de Von Hippel-Lindau/metabolismo , Proteína Supresora de Tumores del Síndrome de Von Hippel-Lindau/genética
4.
Cell Death Dis ; 15(6): 417, 2024 Jun 15.
Artículo en Inglés | MEDLINE | ID: mdl-38879509

RESUMEN

Chemotherapy is a crucial treatment for colorectal tumors. However, its efficacy is restricted by chemoresistance. Recently, Golgi dispersal has been suggested to be a potential response to chemotherapy, particularly to drugs that induce DNA damage. However, the underlying mechanisms by which Golgi dispersal enhances the capacity to resist DNA-damaging agents remain unclear. Here, we demonstrated that DNA-damaging agents triggered Golgi dispersal in colorectal cancer (CRC), and cancer stem cells (CSCs) possessed a greater degree of Golgi dispersal compared with differentiated cancer cells (non-CSCs). We further revealed that Golgi dispersal conferred resistance against the lethal effects of DNA-damaging agents. Momentously, Golgi dispersal activated the Golgi stress response via the PKCα/GSK3α/TFE3 axis, resulting in enhanced protein and vesicle trafficking, which facilitated drug efflux through ABCG2. Identification of Golgi dispersal indicated an unexpected pathway regulating chemoresistance in CRC.


Asunto(s)
Neoplasias Colorrectales , Resistencia a Antineoplásicos , Aparato de Golgi , Células Madre Neoplásicas , Células Madre Neoplásicas/metabolismo , Células Madre Neoplásicas/efectos de los fármacos , Células Madre Neoplásicas/patología , Humanos , Aparato de Golgi/metabolismo , Aparato de Golgi/efectos de los fármacos , Neoplasias Colorrectales/patología , Neoplasias Colorrectales/metabolismo , Neoplasias Colorrectales/tratamiento farmacológico , Neoplasias Colorrectales/genética , Resistencia a Antineoplásicos/efectos de los fármacos , Animales , Línea Celular Tumoral , Transportador de Casetes de Unión a ATP, Subfamilia G, Miembro 2/metabolismo , Transportador de Casetes de Unión a ATP, Subfamilia G, Miembro 2/genética , Daño del ADN , Ratones , Ratones Desnudos , Proteínas de Neoplasias/metabolismo , Proteínas de Neoplasias/genética , Antineoplásicos/farmacología , Antineoplásicos/uso terapéutico
5.
J Clin Lab Anal ; 38(10): e25076, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38853390

RESUMEN

BACKGROUND: Severe acute pancreatitis (SAP) is associated with tremendous systemic inflammation, T-helper 17 (Th17) cells, and regulatory T (Treg) cells play an essential role in the inflammatory responses. Meanwhile, soluble fibrinogen-like protein 2 (Sfgl2) is a critical immunosuppressive effector cytokine of Treg cells and modulates immune responses. However, the impact of SAP induction on Sfgl2 expression and the role of Sfgl2 in immunomodulation under SAP conditions are largely unknown. METHODS: A taurocholate-induced mouse SAP model was established. The ratios of CD4+CD25+Foxp3+ Treg cells or CD4+IL-17+ Th17 cells in blood and pancreatic tissues as well as surface expression of CD80, CD86, and major histocompatibility complex class II (MHC-II) were determined by flow cytometry. Gene mRNA expression was determined by qPCR. Serum amylase and soluble factors were quantitated by commercial kits. Bone marrow-derived dendritic cells (DCs) were generated, and NF-κB/p65 translocation was measured by immunofluorescence staining. RESULTS: SAP induction in mice decreased the Th17/Treg ratio in the pancreatic tissue and increased the Th17/Treg ratio in the peripheral blood. In addition, SAP was associated with a reduced level of Sfgl2 in the pancreatic tissue and blood: higher levels of serum IL-17, IL-2, IFN-α, and TNF-α, and lower levels of serum IL-4 and IL-10. Furthermore, the SAP-induced reduction in Sfgl2 expression was accompanied by dysregulated maturation of bone marrow-derived DCs. CONCLUSIONS: SAP causes reduced Sfgl2 expression and Th17/Treg imbalance, thus providing critical insights for the development of Sfgl2- and Th17/Treg balance-targeted immunotherapies for patients with SAP.


Asunto(s)
Modelos Animales de Enfermedad , Fibrinógeno , Pancreatitis , Linfocitos T Reguladores , Ácido Taurocólico , Células Th17 , Animales , Células Th17/inmunología , Linfocitos T Reguladores/inmunología , Pancreatitis/inmunología , Pancreatitis/inducido químicamente , Pancreatitis/metabolismo , Ratones , Fibrinógeno/metabolismo , Masculino , Ratones Endogámicos C57BL , Regulación hacia Abajo , Células Dendríticas/inmunología , Células Dendríticas/metabolismo , Enfermedad Aguda , Páncreas/inmunología , Páncreas/patología , Páncreas/metabolismo
6.
Int J Biol Sci ; 20(7): 2748-2762, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38725859

RESUMEN

Abnormal nuclear enlargement is a diagnostic and physical hallmark of malignant tumors. Large nuclei are positively associated with an increased risk of developing metastasis; however, a large nucleus is inevitably more resistant to cell migration due to its size. The present study demonstrated that the nuclear size of primary colorectal cancer (CRC) cells at an advanced stage was larger than cells at an early stage. In addition, the nuclei of CRC liver metastases were larger than those of the corresponding primary CRC tissues. CRC cells were sorted into large-nucleated cells (LNCs) and small-nucleated cells (SNCs). Purified LNCs exhibited greater constricted migratory and metastatic capacity than SNCs in vitro and in vivo. Mechanistically, ErbB4 was highly expressed in LNCs, which phosphorylated lamin A/C at serine 22 via the ErbB4-Akt1 signaling pathway. Furthermore, the level of phosphorylated lamin A/C was a negative determinant of nuclear stiffness. Taken together, CRC LNCs possessed greater constricted migratory and metastatic potential than SNCs due to ErbB4-Akt1-mediated lamin A/C phosphorylation and nuclear softening. These results may provide a potential treatment strategy for tumor metastasis by targeting nuclear stiffness in patients with cancer, particularly CRC.


Asunto(s)
Núcleo Celular , Neoplasias Colorrectales , Lamina Tipo A , Proteínas Proto-Oncogénicas c-akt , Receptor ErbB-4 , Transducción de Señal , Animales , Femenino , Humanos , Masculino , Ratones , Línea Celular Tumoral , Movimiento Celular , Núcleo Celular/metabolismo , Neoplasias Colorrectales/metabolismo , Neoplasias Colorrectales/patología , Lamina Tipo A/metabolismo , Ratones Desnudos , Metástasis de la Neoplasia , Fosforilación , Proteínas Proto-Oncogénicas c-akt/metabolismo , Receptor ErbB-4/metabolismo , Receptor ErbB-4/genética
7.
J Inflamm Res ; 17: 3093-3099, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38779428

RESUMEN

Background: Allied disorders of Hirschsprung's disease (ADHD) exhibit symptoms akin to those of Hirschsprung's disease, primarily characterized by intestinal obstruction, bowel dilatation, and chronic constipation. The occurrence of amyloid complications in patients with ADHD is infrequent. In this report, we present a case of ADHD with intestinal ulcers as the initial gastrointestinal manifestation, and subsequent pathological examination revealed the presence of amyloid deposits in the colonic mucosa. Case Report: A male patient, aged 20, exhibited recurring abdominal distension and intestinal obstruction for a duration of three years. Multiple colonoscopies revealed the presence of recurrent colonic ulcers, with pathological examination indicating the existence of amyloid deposits within the mucosal layer of the colon. Abdominal CT scans suggested colonic dilatation. Following a multidisciplinary consultation, a subtotal resection of the colon was performed, and subsequent postoperative pathology confirmed a decrease and absence of myenteric plexus ganglion cells. Considering the patient's symptoms and the findings from the postoperative pathology, a diagnosis of ADHD was made. The patient's symptoms resolved postoperatively and he was discharged from the hospital and followed up for 1 year in stable condition. Conclusion: Our study highlights the potential association between ADHD and the initial presentation of recurrent colonic ulcers, accompanied by amyloid deposition in the intestinal mucosa. This finding suggests a possible pathogenic mechanism for ADHD and offers a novel perspective on its diagnosis.

9.
World J Gastrointest Surg ; 15(8): 1751-1760, 2023 Aug 27.
Artículo en Inglés | MEDLINE | ID: mdl-37701694

RESUMEN

BACKGROUND: Early gastric cancer (EGC) is typically treated with endoscopic submucosal dissection (ESD). However, recurrence may occur after ESD, requiring surveillance. AIM: To examine the knowledge, attitude, and practice (KAP) of EGC survivors following ESD regarding gastric cancer recurrence. METHODS: This cross-sectional study was conducted between June 1, 2022 and October 1, 2022 in Zhejiang, China. A total of 400 EGC survivors who underwent ESD at the Affiliated Jinhua Hospital, Zhejiang University School of Medicine participated in this study. A self-administered questionnaire was developed to assess KAP monitoring gastric cancer after ESD. RESULTS: The average scores for KAP were 3.34, 23.76, and 5.75 out of 5, 30, and 11, respectively. Pearson correlation analysis revealed positive and significant correlations between knowledge and attitude, knowledge and practice, and attitude and practice (r = 0.405, 0.511, and 0.458, respectively; all P < 0.001). Multivariate logistic regression analysis showed that knowledge, attitude, 13-24 mo since the last ESD (vs ≤ 12 mo since the last ESD), and ≥ 25 mo since the last ESD (vs ≤ 12 mo since the last ESD) were independent predictors of proactive practice (odds ratio = 1.916, 1.253, 3.296, and 5.768, respectively, all P < 0.0001). CONCLUSION: EGC survivors showed inadequate knowledge, positive attitude, and poor practices in monitoring recurrences after ESD. Adequate knowledge, positive attitude, and a longer time since the last ESD were associated with practice.

10.
Aging (Albany NY) ; 15(16): 7933-7955, 2023 08 16.
Artículo en Inglés | MEDLINE | ID: mdl-37589508

RESUMEN

Tumor oncogenesis, cancer metastasis, and immune evasion were substantially impacted by the mammalian target of the rapamycin complex 1 (mTORC1) pathway. However, in hepatocellular carcinoma (HCC), no mTORC1 signaling-based gene signature has ever been published. mTORC1 scores were computed employing a single sample gene set enrichment analysis based on databases including the International Cancer Genome Consortium (ICGC) and The Cancer Genome Atlas (TCGA). The PAG1, LHFPL2, and FABP5 expression levels were obtained to construct a mTORC1 pathway-related model. In two databases, the overall survival (OS) rate was shorter for high-mTORC1 score patients compared to those with low scores. The activation of TFs in the group with high risk was enhanced, such as the HIF-1 pathway. Additionally, it was discovered that a high mTORC1 score was linked to an immune exclusion phenotype and enhanced immunosuppressive cell infiltration. Notably, it was discovered that high-mTORC1 scores patients had poorer immunotherapeutic results and might not gain benefit from immunotherapy. When compared to the low HCC metastatic cell lines, the high HCC metastatic cell lines have overexpressed levels of PAG1, LHFPL2, and FABP5 expression. The expression of PAG1, LHFPL2, and FABP5 was inhibited by the MAPK and mTORC1 pathway inhibitors. Our study identified mTORC1 score signature can aid in the development of individualized immunotherapy protocols and predict the HCC patients' prognoses.


Asunto(s)
Carcinoma Hepatocelular , Neoplasias Hepáticas , Humanos , Pronóstico , Carcinogénesis , Inmunoterapia , Diana Mecanicista del Complejo 1 de la Rapamicina , Proteínas de Unión a Ácidos Grasos , Proteínas de la Membrana , Proteínas Adaptadoras Transductoras de Señales
12.
Int J Biol Macromol ; 250: 126104, 2023 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-37536412

RESUMEN

Since inflammatory cytokines cause stress to chondrocytes and the failure of cartilage defects repair with cartilage tissue engineering, it is necessary to develop a scaffold to maintain cartilage regeneration under inflammatory factors caused stress. Following a berberine-oleanolic acid (OA) complex salt (BOA) was grafted to hyaluronic acid (HA) to obtain water soluble BOA-g-HA, it mixed with silk fibroin (SF) to prepared 4 solutions, which contained 30 mg/mL SF and 0.75, 1.5, 2.25, and 3.0 mg/mL BOA-g-HA respectively. They were lyophilized to fabricate BOA-g-HA/SF-1, BOA-g-HA/SF-2, BOA-g-HA/SF-3, and BOA-g-HA/SF-4 composite scaffolds respectively. All prepared scaffolds displayed porous network structure and exhibited promising mechanical properties for tissue engineering applications. Among them, the BOA-g-HA/SF-3 composite scaffold showed the highest influence on maintaining chondrocytic phenotype of chondrocytes under IL-1ß induced stress. Following SF, HA/SF, and BOA-g-HA/SF-3 composite scaffolds with seeded chondrocytes were treated with IL-1ß induction for 1 week, specimens were incubated with cell culture medium for 3 week or were subcutaneously implanted into nude mice for 4 weeks. The results demonstrated that the BOA-g-HA/SF-3 composite scaffold promotes cartilage tissue regeneration in vitro and in vivo under IL-1ß caused stress, suggesting that it can be potential applied for repairing cartilage defects in osteoarthritis patients.


Asunto(s)
Berberina , Fibroínas , Ácido Oleanólico , Ratones , Animales , Humanos , Fibroínas/farmacología , Fibroínas/química , Ácido Hialurónico/farmacología , Ácido Hialurónico/química , Andamios del Tejido/química , Ácido Oleanólico/farmacología , Ratones Desnudos , Cartílago , Ingeniería de Tejidos/métodos
13.
Rev Esp Enferm Dig ; 2023 Jun 22.
Artículo en Inglés | MEDLINE | ID: mdl-37350661

RESUMEN

A 25-year-old man presented with 3-day history of abdominal pain, vomiting, diarrhea, and bloody stools. The contrast-enhanced CT examination of the abdomen detected thickening and edema of intestinal canal wall. The complete colonoscopy showed hyperemia, dropsy and erosion in the sigmoid colon and rectum. The biopsies revealed obvious bleeding points in mucosa. Then, wireless capsule endoscopy (OMOM ® JS-ME-I) was carried out and showed multiple lesions in the entire small intestine with diffused hyperemia, dropsy and erosion, even multiple and large ulcers. Subsequently, symmetrical scattered purpura distributed over the extensor surfaces of the lower limbs. Hence, a firm diagnosis of adult mixed-type Henoch-Schönlein purpura (HSP) was made. With the use of methylprednisolone, the patient was recovered. The patient remained well during our follow-up.

14.
Ear Nose Throat J ; : 1455613231182661, 2023 Jun 21.
Artículo en Inglés | MEDLINE | ID: mdl-37341102

RESUMEN

Objective: To compare the graft success rate and hearing outcomes of endoscopic cartilage reinforcement perichondrium-cartilage composite graft and push-through techniques for the treatment of large marginal perforations. Study Design: Randomized controlled trial. Materials and Methods: A total of 57 large marginal perforations were prospectively randomized to cartilage reinforcement (n = 29) and cartilage push-through technique (n = 28) groups. The graft success rate, audiometric outcomes, and complications were compared between the 2 groups at 6 months. Results: All patients completed 6 months of follow-up. The graft success rate in the cartilage reinforcement group was significantly higher compared to that in the push-through group (100.0% vs 78.6%, P < .01). Residual perforation was observed in 5 (17.9%) patients, and re-perforation in 1 (3.6%) patient, in the push-through group. The preoperative air-bone gap (ABG) was 17.6 ± 3.5 dB in the cartilage reinforcement group and 16.8 ± 8.4 dB in the push-through group (P > .05). Postoperatively, although the postoperative ABG in the cartilage reinforcement group was higher than that in the push-through group, no significant difference was observed (11.8 ± 4.3 dB vs 8.9 ± 2.5 dB, P > .05). Additionally, no significant difference was found in ABG closure between the 2 groups (6.6 ± 1.9 dB vs 7.9 ± 4.7 dB, P > .05). Conclusion: Cartilage reinforcement myringoplasty is a simpler and more useful technique to achieve graft success compared to cartilage-perichondrium push-through for the treatment of large marginal perforations, and it does not affect hearing levels.

15.
Plant Cell Physiol ; 64(2): 258-268, 2023 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-36525532

RESUMEN

We show that the knockout of a sugar transporter gene OsSWEET15 led to a significant drop in rice fertility with around half of the knockout mutant's spikelets bearing blighted or empty grains. The rest of the spikelets bore fertile grains with a slightly reduced weight. Notably, the ovaries in the blighted grains of the ossweet15 mutants expanded after flowering but terminated their development before the endosperm cellularization stage and subsequently aborted. ß- glucuronidase (GUS) and Green Fluorescent Protein (GFP) reporter lines representing the OsSWEET15 expression showed that the gene was expressed in the endosperm tissues surrounding the embryo, which supposedly supplies nutrients to sustain embryo development. These results together with the protein's demonstrated sucrose transport capacity and plasma membrane localization suggest that OsSWEET15 plays a prominent role during the caryopsis formation stage, probably by releasing sucrose from the endosperm to support embryo development. By contrast, the empty grains were probably caused by the reduced pollen viability of the ossweet15 mutants. Investigation of ossweet11 mutant grains revealed similar phenotypes to those observed in the ossweet15 mutants. These results indicate that both OsSWEET15 and OsSWEET11 play important and similar roles in rice pollen development, caryopsis formation and seed-setting, in addition to their function in seed-filling that was demonstrated previously.


Asunto(s)
Oryza , Oryza/genética , Semillas/metabolismo , Endospermo/genética , Transporte Biológico , Glucuronidasa/metabolismo , Sacarosa/metabolismo , Proteínas de Plantas/metabolismo
16.
Cell Death Dis ; 13(7): 651, 2022 07 27.
Artículo en Inglés | MEDLINE | ID: mdl-35896535

RESUMEN

Uneven oxygen supply in solid tumors leads to hypoxic and normoxic regions. Hypoxic cells exhibit increased secretion of lactate, which creates an acidic tumor microenvironment (TME). This acidic TME is positively associated with tumor metastasis. Despite the increased metastatic capacity of hypoxic cells, they are located relatively further away from the blood vessels and have limited access to the circulatory system. Studies have shown that cancer stem cells (CSCs) are enriched for tumor metastasis-initiating cells and generally undergo aerobic respiration, which could be enhanced by lactate. We therefore hypothesized that TME-derived lactate may promote the metastasis of normoxic CSCs. In the present study, the abundance of hypoxic and normoxic CSCs was analyzed in primary CRC tumors. It was found that the proportion of normoxic CSCs was positively associated with tumor stage. Using two human CRC cell lines, LoVo and SW480, and a patient-derived xenograft (XhCRC), it was found that treatment with lactate promoted normoxic CSC metastasis. Metabolism analysis indicated that, upon treatment with lactate, oxidative phosphorylation (OXPHOS) activity in normoxic CSCs was enhanced, whereas hypoxic CSCs were rarely altered. At the molecular level, the expression of peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α), a master regulator of lactate oxidation, was found to be elevated in normoxic CSCs. Furthermore, PGC-1α knockdown markedly reduced the metastatic potential of normoxic CSCs. Notably, both the PGC-1α-mediated OXPHOS activity and metastatic potential were impaired when hypoxia-inducible factor-1α (HIF-1α) was activated in normoxic CSCs. Together, these findings provide a therapeutic strategy against tumor metastasis through the targeting of PGC-1α and, thus, the suppression of lactate-feeding OXPHOS in normoxic CSCs may improve the therapeutic benefit of patients with cancer, particularly CRC.


Asunto(s)
Neoplasias Colorrectales , Fosforilación Oxidativa , Línea Celular , Neoplasias Colorrectales/patología , Humanos , Hipoxia/patología , Ácido Láctico , Células Madre Neoplásicas/metabolismo , Coactivador 1-alfa del Receptor Activado por Proliferadores de Peroxisomas gamma/metabolismo , Microambiente Tumoral
17.
Fish Shellfish Immunol ; 121: 305-315, 2022 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-35031476

RESUMEN

Ichthyophthirius multifiliis is a protozoan ciliate that causes white spot disease (also known as ichthyophthiriasis) in freshwater fish. Holland's spinibarbel (Spinibarbus hollandi) was less susceptible to white spot disease than grass carp (Ctenopharyngodon Idella). In this study, grass carp and Holland's spinibarbel are infected by I. multifiliis and the amount of infection is 10,000 theronts per fish. All grass carp died within 12 days after infection, and the survival rate of Holland's spinibarbel was more than 80%. In order to study the difference in sensitivity of these two fish species to I. multifiliis, transcriptome analysis was conducted using gill, skin, liver, spleen and head kidney of Holland's spinibarbel and grass carp at 48 h post-infection with I. multifiliis. A total of 489,296,696 clean reads were obtained by sequencing. A total of 105 significantly up-regulated immune-related genes were obtained by Gene Ontology (GO) classification and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis in grass carp. Cluster of differentiation 40 (CD40), cluster of differentiation 80 (CD 80), tumor necrosis factor-alpha (TNF-α), toll-like receptor 4 (TLR-4), interleukin 1 beta (IL-1ß) and other inflammatory-related genes in grass carp were enriched in the cytokine-cytokine receptor interaction pathway and toll-like receptor pathway. In Holland's spinibarbel, a total of 46 significantly up-regulated immune-related genes were obtained by GO classification and KEGG pathway enrichment analysis. Immune-related genes, such as Immunoglobin heavy chain (IgH), cathepsin S (CTSS), complement C1q A chain (C1qA), complement component 3 (C3) and complement component (C9) were enriched in phagosome pathway, lysosome pathway and complement and coagulation concatenation pathway. C3 was significantly up-regulated in gill and head kidney. Fluorescence in situ hybridization (FISH) showed that the C3 gene was highly expressed in gill tissue of Holland's spinibarbel infected with I. multifiliis. A small amount of C3 gene was expressed in the gill arch of grass carp after infected with I. multifiliis. In conclusion, the severe inflammatory response in vivo after infecting grass carp with I. multifiliis might be the main cause of the death of grass carp. The extrahepatic expression of the gene of Holland's spinibarbel might play an important role in the immune defense against I. multifiliis.


Asunto(s)
Carpas , Infecciones por Cilióforos , Cyprinidae , Enfermedades de los Peces , Hymenostomatida , Animales , Carpas/genética , Carpas/parasitología , Infecciones por Cilióforos/genética , Infecciones por Cilióforos/veterinaria , Cyprinidae/genética , Cyprinidae/parasitología , Enfermedades de los Peces/parasitología , Proteínas de Peces/genética , Perfilación de la Expresión Génica , Hymenostomatida/patogenicidad , Países Bajos
18.
Plant Sci ; 314: 111065, 2022 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-34895534

RESUMEN

Sucrose-proton symporters play important roles in carbohydrate transport during plant growth and development. Their physiological functions have only been partly characterized and their regulation mechanism is largely unclear. Here we report that the knockout of a sucrose transporter gene, OsSUT1, by CRISPR-Cas9 mediated gene editing resulted in a slightly dwarf size and complete infertility of the gene's homozygous mutants. Observation of caryopsis development revealed that the endosperm of OsSUT1 mutants failed to cellularize and did not show any sign of seed-filling. Consistently, OsSUT1 was identified to express strongly in developing caryopsis of wild-type rice, particularly in the nucellar epidermis and aleurone which are critical for the uptake of nutrients into the endosperm. These results indicate that OsSUT1 is indispensable during the rice reproductive stage particularly for caryopsis development. Interestingly, OsSUT1 possesses at least 6 alternative splicing transcripts, including the 4 transcripts deposited previously and the other two identified by us. The differences among these transcripts primarily lie in their coding region of the 3' end and 3' UTR region. Real-time PCR showed that 4 of the 6 transcripts had different expressional patterns during rice vegetative and reproductive growth stages. Given the versatility of the gene, addressing its alternative splicing mechanism may expand our understanding of SUT's function substantially.


Asunto(s)
Repeticiones Palindrómicas Cortas Agrupadas y Regularmente Espaciadas , Fertilidad/genética , Proteínas de Transporte de Membrana/genética , Proteínas de Transporte de Membrana/metabolismo , Oryza/genética , Oryza/metabolismo , Sacarosa/metabolismo , Empalme Alternativo , Productos Agrícolas/genética , Productos Agrícolas/metabolismo , Grano Comestible/genética , Grano Comestible/metabolismo , Regulación de la Expresión Génica de las Plantas , Genes de Plantas , Variación Genética , Genotipo , Semillas/crecimiento & desarrollo
19.
Int J Mol Sci ; 22(20)2021 Oct 18.
Artículo en Inglés | MEDLINE | ID: mdl-34681858

RESUMEN

Sugar transporters play important or even indispensable roles in sugar translocation among adjacent cells in the plant. They are mainly composed of sucrose-proton symporter SUT family members and SWEET family members. In rice, 5 and 21 members are identified in these transporter families, and some of their physiological functions have been characterized on the basis of gene knockout or knockdown strategies. Existing evidence shows that most SUT members play indispensable roles, while many SWEET members are seemingly not so critical in plant growth and development regarding whether their mutants display an aberrant phenotype or not. Generally, the expressions of SUT and SWEET genes focus on the leaf, stem, and grain that represent the source, transport, and sink organs where carbohydrate production, allocation, and storage take place. Rice SUT and SWEET also play roles in both biotic and abiotic stress responses in addition to plant growth and development. At present, these sugar transporter gene regulation mechanisms are largely unclear. In this review, we compare the expressional profiles of these sugar transporter genes on the basis of chip data and elaborate their research advances. Some suggestions concerning future investigation are also proposed.


Asunto(s)
Proteínas de Transporte de Membrana/fisiología , Oryza/fisiología , Proteínas de Plantas/fisiología , Regulación de la Expresión Génica de las Plantas , Interacciones Huésped-Patógeno/genética , Oryza/microbiología , Estrés Fisiológico/fisiología , Sacarosa/metabolismo , Azúcares/metabolismo
20.
Exp Biol Med (Maywood) ; 246(24): 2559-2569, 2021 12.
Artículo en Inglés | MEDLINE | ID: mdl-34514884

RESUMEN

In breast cancer, tumor-associated macrophages with activated phenotypes promote tumor invasion and metastasis. The more aggressive mesenchymal-like breast cancer cells have a selective advantage, skewing macrophages toward the more immunosuppressive subtype. However, the mechanism underlying this shift is poorly understood. Cyclin D1b is a highly oncogenic variant of cyclin D1. Our previous study showed that non-metastatic epithelial-like breast cancer cells were highly metastatic in vivo when cyclin D1b was overexpressed. The present study determined whether cyclin D1b contributed to the interaction between breast cancer cells and macrophages. The results showed that cyclin D1b promoted the invasion of breast cancer cells in vitro. Specifically, through overexpression of cyclin D1b, breast cancer cells regulated the differentiation of macrophages into a more immunosuppressive M2 phenotype. Notably, tumor cells overexpressing cyclin D1b activated macrophages and induced migration of breast cancer cells. Further investigations indicated that SDF-1 mediated macrophage activation through breast cancer cells overexpressing cyclin D1b. These results revealed a previously unknown link between aggressive breast cancer cells and Tumor-associated macrophages, and highlighted the importance of cyclin D1b activity in the breast cancer microenvironment.


Asunto(s)
Neoplasias de la Mama/patología , Ciclina D1/inmunología , Metástasis de la Neoplasia/patología , Microambiente Tumoral/inmunología , Macrófagos Asociados a Tumores/inmunología , Animales , Neoplasias de la Mama/inmunología , Neoplasias de la Mama/metabolismo , Ciclina D1/metabolismo , Femenino , Ratones , Ratones Endogámicos BALB C , Ratones Desnudos , Metástasis de la Neoplasia/inmunología , Fenotipo , Macrófagos Asociados a Tumores/metabolismo
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