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1.
J Neurochem ; 2024 Oct 31.
Artigo em Inglês | MEDLINE | ID: mdl-39479764

RESUMO

Evidence from observational and Mendelian randomization (MR) studies suggested that insulin resistance (IR) was associated with Alzheimer's disease (AD). However, the causal effects of different indicators of IR on AD remain inconsistent. Here, we aim to assess the causal association between the insulin sensitivity index (ISI), a measure of post-prandial IR, and the risk of AD. We first conducted primary and secondary univariable MR analyses. We selected 8 independent genome-wide significant (p < 5E-08, primary analyses) and 61 suggestive (p < 1E-05, secondary analyses) ISI genetic variants from large-scale genome-wide association studies (GWAS; N = 53 657), respectively, and extracted their corresponding GWAS summary statistics from AD GWAS, including IGAP2019 (N = 63 926) and FinnGen_G6_AD_WIDE (N = 412 181). We selected five univariable MR methods and used heterogeneity, horizontal pleiotropy test, and leave-one-out sensitivity analysis to confirm the stability of MR estimates. Finally, we conducted a meta-analysis to combine MR estimates from two non-overlapping AD GWAS datasets. We further performed multivariable MR (MVMR) to assess the potential mediating role of type 2 diabetes (T2D) on the association between ISI and AD using two MVMR methods. In univariable MR, utilizing 8 genetic variants in primary analyses, we found a significant causal association of genetically increased ISI with decreased risk of AD (OR = 0.79, 95% CI: 0.68-0.92, p = 0.003). Utilizing 61 genetic variants in secondary analyses, we found consistent findings of a causal effect of genetically increased ISI on the decreased risk of AD (OR = 0.89, 95% CI: 0.82-0.96, p = 0.003). Heterogeneity, horizontal pleiotropy test, and leave-one-out sensitivity analysis ensured the reliability of the MR estimates. In MVMR, we found no causal relationship between ISI and AD after adjusting for T2D (p > 0.05). We provide genetic evidence that increased ISI is significantly and causally associated with reduced risk of AD, which is mediated by T2D. These findings may inform prevention strategies directed toward IR-associated T2D and AD.

2.
J Neurosci ; 40(13): 2644-2662, 2020 03 25.
Artigo em Inglês | MEDLINE | ID: mdl-32066583

RESUMO

Yes-associated protein (YAP) transcriptional coactivator is negatively regulated by the Hippo pathway and functions in controlling the size of multiple organs, such as liver during development. However, it is not clear whether YAP signaling participates in the process of the formation of glia scars after spinal cord injury (SCI). In this study, we found that YAP was upregulated and activated in astrocytes of C57BL/6 male mice after SCI in a Hippo pathway-dependent manner. Conditional knockout (KO) of yap in astrocytes significantly inhibited astrocytic proliferation, impaired the formation of glial scars, inhibited the axonal regeneration, and impaired the behavioral recovery of C57BL/6 male mice after SCI. Mechanistically, the bFGF was upregulated after SCI and induced the activation of YAP through RhoA pathways, thereby promoting the formation of glial scars. Additionally, YAP promoted bFGF-induced proliferation by negatively controlling nuclear distribution of p27Kip1 mediated by CRM1. Finally, bFGF or XMU-MP-1 (an inhibitor of Hippo kinase MST1/2 to activate YAP) injection indeed activated YAP signaling and promoted the formation of glial scars and the functional recovery of mice after SCI. These findings suggest that YAP promotes the formation of glial scars and neural regeneration of mice after SCI, and that the bFGF-RhoA-YAP-p27Kip1 pathway positively regulates astrocytic proliferation after SCI.SIGNIFICANCE STATEMENT Glial scars play critical roles in neuronal regeneration of CNS injury diseases, such as spinal cord injury (SCI). Here, we provide evidence for the function of Yes-associated protein (YAP) in the formation of glial scars after SCI through regulation of astrocyte proliferation. As a downstream of bFGF (which is upregulated after SCI), YAP promotes the proliferation of astrocytes through negatively controlling nuclear distribution of p27Kip1 mediated by CRM1. Activation of YAP by bFGF or XMU-MP-1 injection promotes the formation of glial scar and the functional recovery of mice after SCI. These results suggest that the bFGF-RhoA-YAP-p27Kip1 axis for the formation of glial scars may be a potential therapeutic strategy for SCI patients.


Assuntos
Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Astrócitos/metabolismo , Proteínas de Ciclo Celular/metabolismo , Gliose/metabolismo , Regeneração Nervosa/fisiologia , Traumatismos da Medula Espinal/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/genética , Animais , Proteínas de Ciclo Celular/genética , Proliferação de Células/fisiologia , Inibidor de Quinase Dependente de Ciclina p27/metabolismo , Gliose/genética , Gliose/patologia , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , Neurônios/metabolismo , Recuperação de Função Fisiológica/fisiologia , Transdução de Sinais/fisiologia , Traumatismos da Medula Espinal/genética , Traumatismos da Medula Espinal/patologia , Proteínas de Sinalização YAP
3.
Glia ; 68(9): 1757-1774, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32057144

RESUMO

Olfactory ensheathing cells (OECs) are unique glial cells with axonal growth-promoting properties in the olfactory epithelium and olfactory bulb, covering the entire length of the olfactory nerve. The proliferation of OECs is necessary for the formation of the presumptive olfactory nerve layer (ONL) during development and OECs transplantation. However, the molecular mechanism underlying the regulation of OEC proliferation in the ONL still remains unknown. In the present study, we examined the role of sphingosine 1-phosphate (S1P) and S1P receptors (S1PRs) on OEC proliferation. Initially, reverse transcription-PCR (RT-PCR), western blot and immunostaining revealed that S1PRs were highly expressed in the OECs in vitro and in vivo. Furthermore, we found that S1P treatment promoted the proliferation of primary cultured OECs mediated by S1PR1. Mechanistically, yes-associated protein (YAP) was required for S1P-induced OEC proliferation through RhoA signaling. Finally, conditional knockout of YAP in OECs reduced OEC proliferation in ONL, which impaired the axonal projection and growth of olfactory sensory neurons, and olfactory functions. Taken together, these results reveal a previously unrecognized function of S1P/RhoA/YAP pathway in the proliferation of OECs, contributing to the formation of ONL and the projection, growth, and function of olfactory sensory neurons during development.


Assuntos
Neuroglia , Nervo Olfatório , Proliferação de Células , Células Cultivadas , Lisofosfolipídeos , Bulbo Olfatório , Esfingosina/análogos & derivados
4.
Mol Pharm ; 17(5): 1516-1526, 2020 05 04.
Artigo em Inglês | MEDLINE | ID: mdl-32243181

RESUMO

It is well-known that large size nanoparticles stay for a long time in the circulation system, but show poor tissue penetration and low cellular uptake. In order to reconcile the conflicting needs for extended circulation time, extensive tumor tissue penetration, and enhanced cellular uptake for nanodrug delivery systems, we designed DOX-containing hypersensitive nanoparticles that responded to the tumor microenvironment for programmed DOX delivery. A supersensitive polymer material, poly(2-ethyl-2-oxazoline)-poly(methacryloyl sulfadimethoxine), was synthesized (PEOz-b-PSD, pKa = 6.96). At the physiological environment, PEOz-b-PSD and polyamidoamine/DOX (PAMAM/DOX) can form nanoparticles, PEOz-b-PSD/PAMAM/DOX (PEPSD/PAM/DOX), via electrostatic adsorption. The PEPSD/PAM/DOX has an intact structure, which can prolong circulation time. While in the tumor environment, the PEOz-b-PSD was rapidly protonated and showed charge reversal, leading the detachment of PEOz-b-PSD from the nanoparticles; then the large size nanoparticles with a negative charge (PEPSD/PAM/DOX) instantaneously turn into positively charged ultrafine nanoparticles. The sudden inversion of size and charge can effectively improve tumor accumulation and internal penetration. After entering tumor cells, nanoparticles can release drugs quickly through the action of a PAMAM proton sponge, resulting in enhanced tumor inhibition. Our results proved that the programmed nanoparticles could remarkably enhance the in vivo antitumor efficacy and reduce cardiotoxicity of DOX. This study designed ultrasensitive nanoparticles in the tumor microenvironment, which appear to be beneficial for enhancing the treatment efficacy of DOX in solid tumors.


Assuntos
Antineoplásicos , Nanopartículas , Neoplasias , Antineoplásicos/uso terapêutico , Linhagem Celular Tumoral , Doxorrubicina/química , Portadores de Fármacos/química , Sistemas de Liberação de Medicamentos/métodos , Humanos , Concentração de Íons de Hidrogênio , Nanopartículas/química , Neoplasias/tratamento farmacológico , Microambiente Tumoral
5.
Pharm Res ; 37(12): 242, 2020 Nov 13.
Artigo em Inglês | MEDLINE | ID: mdl-33188481

RESUMO

PURPOSE: In order to improve the therapeutic efficiency of the chemotherapeutic drug paclitaxel in tumors, a folate-based Paclitaxel nanoemulsion (FNEs) was developed for tumor targeted treatment. METHODS: In this study, we designed a folate-targeted nanoemulsion (folate/PEG-DSPE/nanoemulsion, FNEs) based on the traditional nanoemulsion using the principle of long-circulation targeting receptor mediated. The nanoemulsion (folate/PEG-DSPE/nanoemulsion, FNEs) was fabricated using high-pressure homogenization with a microfluidizer. RESULTS: The nanoemulsion (folate/PEG-DSPE/nanoemulsion, FNEs) can improve the delivery efficiency of nanocarriers at the tumor site by virtue of the high expression of folate receptors on the tumor surface. Malvern Nanoseries device and transmission electron microscopy (TEM) analyses showed that the nanoemulsions were spherical with an average diameter of 140 nm. The nanoemulsions can effectively carry paclitaxel (PTX) with an encapsulation rate of about 95%. And in vitro experiments have shown that it can efficiently increase the uptake of PTX in 4 T1 breast cancer cells and FNEs had a targeting capability hundredfold higher than that of PTX-loaded nanoemulsions (PTX-NEs) without folate. In vivo experiments have shown that the pharmacokinetic parameters of FNEs were better than those of other PTX groups and FNEs can significantly enhance circulation time in the body of the subcutaneously implanted 4 T1 breast cancer in mice, increase the accumulation of chemotherapy drugs at tumor sites and effectively inhibit tumor growth with lower system toxicity. CONCLUSIONS: This study can effectively improve the therapeutic efficiency of chemotherapy drugs for tumors, and provide an useful reference for solving the problem of low efficacy of chemotherapy drugs in clinical treatment of tumors. Graphical Abstract Schematic representation of Folic acid/PEG-DSPE/nano-emulsion (FNEs) specifically target tumor cells and enhanced anti-tumor effects.


Assuntos
Antineoplásicos/administração & dosagem , Neoplasias da Mama/tratamento farmacológico , Portadores de Fármacos , Ácido Fólico/metabolismo , Nanopartículas , Paclitaxel/administração & dosagem , Fosfatidiletanolaminas/química , Polietilenoglicóis/química , Animais , Antineoplásicos/química , Antineoplásicos/farmacocinética , Apoptose/efeitos dos fármacos , Neoplasias da Mama/metabolismo , Neoplasias da Mama/patologia , Linhagem Celular Tumoral , Composição de Medicamentos , Emulsões , Feminino , Ácido Fólico/química , Transportadores de Ácido Fólico/metabolismo , Injeções Intravenosas , Camundongos , Camundongos Endogâmicos BALB C , Nanotecnologia , Paclitaxel/química , Paclitaxel/farmacocinética , Ratos Sprague-Dawley , Carga Tumoral/efeitos dos fármacos
6.
J Periodontal Res ; 55(2): 229-237, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31630411

RESUMO

BACKGROUND: Mechanical stimuli can cause periodontal tissue reconstruction. Studies have found that changes in metabolites can be the terminal effect of integrin-mediated mechanical signaling. As a key kinase in integrin regulation, integrin-linked kinase (ILK) mediates mechanical signal transduction, which may contribute to metabolite changes. Defining the components of small-molecule metabolites can optimize mechanical stimuli and periodontal tissue reconstruction. Our purpose is to detect the effect of ILK-mediated mechanical signaling on intracellular small-molecule metabolites (amino acids and organic acids) in human periodontal ligament fibroblasts (HPDLFs). METHODS: Primary HPDLFs were isolated by enzyme digestion method. Tensile stresses were applied on HPDLFs in vitro using a Flexcell system. ILK gene in HPDLFs was knocked down by RNA interference (RNAi). Twenty common amino acids and seven organic acids in HPDLFs were analyzed by gas chromatography/mass spectrometry technique. RESULTS: Five amino acids (ie, alanine, glutamine, glutamate, glycine, and threonine) and three organic acids (ie, pyruvate, lactate, and citric acid) were found to be changed remarkably after mechanical stretching. In addition, baseline levels of four amino acids (ie, glutamate, glutamine, threonine, and glycine) and two organic acids (ie, lactate and citric acid) were significantly different in ILK knockdown compared with wild-type HPDLFs. CONCLUSION: This study suggests that five amino acids (ie, alanine, glutamine, glutamate, glycine, and threonine) and three organic acids (ie, pyruvate, lactate, and citric acid) may act as cellular mediators for mechanical signals in HPDLFs. Among them, four amino acids (ie, glutamate, glutamine, threonine, and glycine) and two organic acids (ie, lactate and citric acid) may be closely linked to ILK.


Assuntos
Fibroblastos/enzimologia , Mecanotransdução Celular , Ligamento Periodontal/citologia , Proteínas Serina-Treonina Quinases/fisiologia , Estresse Mecânico , Aminoácidos , Células Cultivadas , Ácido Cítrico , Fibroblastos/citologia , Técnicas de Silenciamento de Genes , Humanos , Ácido Láctico , Proteínas Serina-Treonina Quinases/genética , Ácido Pirúvico , Interferência de RNA
7.
Oral Dis ; 26(8): 1747-1754, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32531841

RESUMO

OBJECTIVE: To investigate the roles of integrin-linked kinase (ILK) in mediating the cell migration, proliferation, and apoptosis of human periodontal ligament cells (hPDLCs) in response to cyclic tensile stress. METHODS: Primary hPDLCs were obtained through the enzyme digestion and tissue culture method. Short hairpin ILK-expressing hPDLCs were constructed using a recombinant lentiviral vector that specifically targeted ILK gene expression. The silencing of the ILK gene was identified by quantitative real-time polymerase chain reaction (qRT-PCR) and Western blot. The hPDLCs were seeded on a flexible substrate and loaded with cyclic tensile stress at 0.5 Hz for 0, 2, 4, and 8 hr, consecutively, with the Flexcell Tension System. The response of cell migration was tested by the scratch assay. Cell proliferation was characterized by optical density (OD) value of cell counting kit-8 (CCK-8) test and Ki67 mRNA expression of qRT-PCR. Cell apoptosis was determined by flow cytometry and Caspase-3 mRNA expression of qRT-PCR. RESULTS: Knocking down ILK substantially reduces migration and proliferation as well as regulates the sensitivity of hPDLCs to apoptosis under cyclic tensile stress. CONCLUSIONS: ILK can promote the proliferation and migration as well as inhibit apoptosis of hPDLCs under cyclic tensile stress.


Assuntos
Apoptose , Ligamento Periodontal , Movimento Celular , Proliferação de Células , Células Cultivadas , Humanos , Proteínas Serina-Treonina Quinases , RNA Interferente Pequeno
8.
Mol Biol Rep ; 46(4): 4201-4212, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31147861

RESUMO

Current methods, such as serum thyroglobulin measurement and medical imaging, have limitations in the routine monitoring of the disease status and treatment response of patients with differentiated thyroid cancers (DTCs), and additional methods remain to be explored. The aim of this study was to investigate the clinical value of the sodium/iodide symporter (NIS) expression and epithelial-mesenchymal transition (EMT) phenotypes of circulating tumor cells (CTCs) in monitoring the disease status and treatment response of DTC. Blood samples were obtained from DTC patients before (1 to 3 months after total thyroidectomy) and 4 to 6 months after radioactive iodine-131 (RAI) therapy for the CTC assessments. The number, NIS expression, and EMT phenotypes of CTCs were enumerated and characterized with CanPatrol™ CTC enrichment and mRNA in situ hybridization. Postoperative NIS high expression was independently correlated with a better response to first RAI therapy and good treatment efficacy. Postoperative NIS-/epithelial-/mesenchymal+ CTCs presence was independently correlated with a worse response to first RAI therapy. The numbers of total NIS+ CTCs and NIS+/epithelial+/mesenchymal+ CTCs after first RAI therapy were negatively correlated with a better response to RAI therapy only in univariate analyses. Univariate and multivariate analyses showed that a decreased or unchanged number of total NIS+ CTCs after RAI therapy may denote good efficacy and effective RAI therapy. These preliminary data suggest that assessment of the NIS expression and EMT phenotypes of CTCs may serve as potential adjuncts for predicting and monitoring the curative effect of RAI therapy in DTC patients and avoid ineffective treatment. Further validation is warranted.


Assuntos
Radioisótopos do Iodo/uso terapêutico , Células Neoplásicas Circulantes/efeitos da radiação , Simportadores/genética , Neoplasias da Glândula Tireoide/genética , Neoplasias da Glândula Tireoide/radioterapia , Adolescente , Adulto , Idoso , Biomarcadores Tumorais/genética , Transição Epitelial-Mesenquimal/genética , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Radioterapia/métodos , Simportadores/metabolismo , Neoplasias da Glândula Tireoide/patologia
9.
Mol Cell Neurosci ; 92: 27-39, 2018 10.
Artigo em Inglês | MEDLINE | ID: mdl-29940213

RESUMO

Olfactory ensheathing cells (OECs) migrate from olfactory epithelium towards olfactory bulb (OB), contributing to formation of the presumptive olfactory nerve layer during development. However, it remains unclear that molecular mechanism of regulation of OEC migration in OB. In the present study, we found that OECs highly expressed the receptors of semaphorin 3A (Sema3A) in vitro and in vivo, whereas Sema3A displayed a gradient expression pattern with higher in inner layer of OB and lower in outer layer of OB. Furthermore, the collapse assays, Boyden chamber migration assays and single-cell migration assays showed that Sema3A induced the collapse of leading front of OECs and inhibited OEC migration. Thirdly, the leading front of OECs exhibited adaptation in a protein synthesis-independent manner, and endocytosis-dependent manner during Sema3A-induced OEC migration. Finally, Sema3A-induced collapse of leading front was required the decrease of focal adhesion and a retrograde F-actin flow in a cofilin activation-dependent manner. Taken together, these results demonstrate that Sema3A as an inhibitive migratory factor for OEC migration through cofilin activation is involved in the formation of olfactory nerve layer.


Assuntos
Movimento Celular , Nervo Olfatório/citologia , Semaforina-3A/metabolismo , Fatores de Despolimerização de Actina/metabolismo , Actinas/metabolismo , Animais , Células Cultivadas , Masculino , Neurogênese , Neuroglia/citologia , Neuroglia/metabolismo , Nervo Olfatório/metabolismo , Ratos , Ratos Sprague-Dawley , Semaforina-3A/genética
10.
Cell Mol Neurobiol ; 38(3): 679-690, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-28762191

RESUMO

Spinal cord injury (SCI) is a devastating neurological disorder. Autophagy is induced and plays a crucial role in SCI. Ginsenoside Rb1 (Rb1), one of the major active components extracted from Panax Ginseng CA Meyer, has exhibited neuroprotective effects in various neurodegenerative diseases. However, it remains unknown whether autophagy is involved in the neuroprotection of Rb1 on SCI. In this study, we examined the regulation of autophagy following Rb1 treatment and its involvement in the Rb1-induced neuroprotection in SCI and in vitro injury model. Firstly, we found that Rb1 treatment decreased the loss of motor neurons and promoted function recovery in the SCI model. Furthermore, we found that Rb1 treatment inhibited autophagy in neurons, and suppressed neuronal apoptosis and autophagic cell death in the SCI model. Finally, in the in vitro injury model, Rb1 treatment increased the viability of PC12 cells and suppressed apoptosis by inhibiting excessive autophagy, whereas stimulation of autophagy by rapamycin abolished the anti-apoptosis effect of Rb1. Taken together, these findings suggest that the inhibition of autophagy is involved in the neuroprotective effects of Rb1 on SCI.


Assuntos
Autofagia/efeitos dos fármacos , Ginsenosídeos/farmacologia , Recuperação de Função Fisiológica/efeitos dos fármacos , Traumatismos da Medula Espinal/tratamento farmacológico , Animais , Apoptose/efeitos dos fármacos , Masculino , Neurônios Motores/efeitos dos fármacos , Neurônios Motores/metabolismo , Fármacos Neuroprotetores/farmacologia , Células PC12 , Ratos , Ratos Sprague-Dawley , Medula Espinal/efeitos dos fármacos , Medula Espinal/metabolismo , Traumatismos da Medula Espinal/metabolismo
11.
Jpn J Clin Oncol ; 46(7): 622-30, 2016 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-27162320

RESUMO

OBJECTIVE: Nasopharyngeal carcinoma is one of the leading malignancies with obscure etiology. Circulating tumor cells have been showed to intimately correlate with characteristics in different kinds of cancer. But links between circulating tumor cells and nasopharyngeal carcinoma were still lacking. Therefore, we explored circulating tumor cells' distribution in nasopharyngeal carcinoma and their possible associations with nasopharyngeal carcinoma. METHODS: Firstly, we found that the positive ratio of circulating tumor cells is extremely high in four stages of nasopharyngeal carcinoma. Meanwhile, positive ratios of mesenchymal circulating tumor cells were higher in early stages of nasopharyngeal carcinoma. Apart from epithelial circulating tumor cells, total, hybrid and mesenchymal circulating tumor cells were correlated with nasopharyngeal carcinoma clinical stage. RESULTS: Our results showed that hybrid and mesenchymal circulating tumor cells were associated with nasopharyngeal carcinoma metastasis (both distant and lymph node) and smoking. Meanwhile, hybrid circulating tumor cells expressed the highest Epstein-Barr virus proteins and deoxyribonucleic acid in three types of circulating tumor cells. Moreover, we found that Epstein-Barr virus proteins viral-caspid antigen-immunoglobulin A (VCA/IgA) and early antigen-immunoglobulin A (EA/IgA), but not Epstein-Barr virus-deoxyribonucleic acid, had a closed association with nasopharyngeal carcinoma metastasis. However, Epstein-Barr virus hallmarks failed to associate with other nasopharyngeal carcinoma characteristics. Furthermore, we confirmed that matrix metalloproteinase 9 existed in circulating tumor cells and expressed most in mesenchymal circulating tumor cells. In addition, matrix metalloproteinase 9-expressed extent in hybrid circulating tumor cells is somewhat different from epithelial and mesenchymal circulating tumor cells in matrix metalloproteinase 9-positive circulating tumor cells. Nevertheless, matrix metalloproteinase 9 had no relationship with other nasopharyngeal carcinoma characteristics. Finally, our results showed that circulating tumor cells were decreased in patients after therapies. CONCLUSION: Taken together, circulating tumor cells were tightly correlated with nasopharyngeal carcinoma characteristics. In addition, Epstein-Barr virus was associated with nasopharyngeal carcinoma metastasis. Of note, decreased circulating tumor cells indicated a favorable curative effect in nasopharyngeal carcinoma patients.


Assuntos
Neoplasias Nasofaríngeas/sangue , Neoplasias Nasofaríngeas/patologia , Células Neoplásicas Circulantes/patologia , Idoso , Anticorpos Antivirais/sangue , Antígenos Virais/análise , Carcinoma , Infecções por Vírus Epstein-Barr/complicações , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Carcinoma Nasofaríngeo , Neoplasias Nasofaríngeas/virologia , Metástase Neoplásica/patologia
12.
Clin Chem Lab Med ; 52(2): 243-51, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24021598

RESUMO

BACKGROUND: Enumeration and characterization of circulating tumor cells (CTCs) can provide information on patient prognosis and treatment efficacy. However, CTCs are rare, making their isolation a major technological challenge. We developed a technique for enrichment, and subsequent characterization of CTCs based on efficient depletion of human leukocytes. METHODS: The technique (CanPatrolTM CTC enrichment) we developed is based on red blood cell lysis to remove erythrocytes, followed by depletion of CD45+ leukocytes using a magnetic bead separation method, and subsequent isolation of CTCs by virtue of their larger size, compared with leukocytes. We also demonstrated that fluorescence in situ hybridization (FISH) and genetic abnormalities analysis could be performed on the isolated CTCs. RESULTS: The spiking experiments showed that the average efficacy of leukocytes depletion was 99.98% and the average tumor cells recovery was not lower than 80%. FISH could be used to perform ALK gene rearrangement analysis on the collected NCI-H2228 cells, and EGFR Exon 19 deletion was detected by PCR-based analysis in isolated HCC827 cells. The in vivo feasibility of this technique had been demonstrated in patients with non-small cell lung cancer, breast, colon, and esophageal cancers. CTCs were detected in 13 of 59 blood samples. Tumor microemboli was also detected in three breast cancer samples. CONCLUSIONS: The technique we developed allowed isolation and characterization of circulating epithelial tumor cells that do not express classical epithelial antigens. This potentially leads to a more accurate enumeration of the number of CTCs and is suitable for application to a broad range of cancers.


Assuntos
Separação Imunomagnética , Leucócitos/citologia , Células Neoplásicas Circulantes/metabolismo , Quinase do Linfoma Anaplásico , Linhagem Celular Tumoral , Tamanho Celular , DNA/análise , Análise Mutacional de DNA , Receptores ErbB/genética , Receptores ErbB/metabolismo , Eritrócitos/citologia , Eritrócitos/metabolismo , Feminino , Hemólise , Células Hep G2 , Humanos , Antígenos Comuns de Leucócito/imunologia , Antígenos Comuns de Leucócito/metabolismo , Leucócitos/metabolismo , Células MCF-7 , Masculino , Mutação , Estadiamento de Neoplasias , Neoplasias/imunologia , Neoplasias/metabolismo , Neoplasias/patologia , Receptores Proteína Tirosina Quinases/genética , Receptores Proteína Tirosina Quinases/metabolismo
13.
Clin Neurol Neurosurg ; 236: 108072, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38061157

RESUMO

OBJECTIVE: Patients with preoperative deep vein thrombosis (DVT) exhibit a notable incidence of postoperative deep vein thrombosis progression (DVTp), which bears a potential for silent, severe consequences. Consequently, the development of a predictive model for the risk of postoperative DVTp among spinal trauma patients is important. METHODS: Data of 161 spinal traumatic patients with preoperative DVT, who underwent spine surgery after admission, were collected from our hospital between January 2016 and December 2022. The least absolute shrinkage and selection operator (LASSO) combined with multivariable logistic regression analysis was applied to select variables for the development of the predictive logistic regression models. One logistic regression model was formulated simply with the Caprini risk score (Model A), while the other model incorporated not only the previously screened variables but also the age variable (Model B). The model's capability was evaluated using sensitivity, specificity, positive predictive value, negative predictive value, accuracy, F1 score, and receiver operating characteristic (ROC) curve. Nomograms simplified and visually presented Model B for the clinicians and patients to understand the predictive model. The decision curve was used to analyze the clinical value of Model B. RESULTS: A total of 161 DVT patients were enrolled in this study. Postoperative DVTp occurred in 48 spinal trauma patients, accounting for 29.81% of the total patient enrolled. Model A inadequately predicted postoperative DVTp in spinal trauma patients, with ROC AUC values of 0.595 for the training dataset and 0.593 for the test dataset. Through the application of LASSO regression and multivariable logistic regression, a screening process was conducted for seven risk factors: D-dimer, blood platelet, hyperlipidemia, blood group, preoperative anticoagulant, spinal cord injury, lower extremity varicosities. Model B demonstrated superior and consistent predictive performance, with ROC AUC values of 0.809 for the training dataset and 0.773 for the test dataset. According to the calibration curves and decision curve analysis, Model B could accurately predict the probability of postoperative DVTp after spine surgery. The nomograms enhanced the interpretability of Model B in charts and graphs. CONCLUSIONS: In summary, we established a logistic regression model for the accurate predicting of postoperative deep vein thrombosis progression in spinal trauma patients, utilizing D-dimer, blood platelet, hyperlipidemia, blood group, preoperative anticoagulant, spinal cord injury, lower extremity varicosities, and age as predictive factors. The proposed model outperformed a logistic regression model based simply on CRS. The proposed model has the potential to aid frontline clinicians and patients in identifying and intervening in postoperative DVTp among traumatic patients undergoing spinal surgery.


Assuntos
Antígenos de Grupos Sanguíneos , Hiperlipidemias , Traumatismos da Medula Espinal , Trombose Venosa , Humanos , Fatores de Risco , Trombose Venosa/diagnóstico , Trombose Venosa/epidemiologia , Trombose Venosa/etiologia , Complicações Pós-Operatórias/diagnóstico , Complicações Pós-Operatórias/epidemiologia , Anticoagulantes , Traumatismos da Medula Espinal/complicações , Hiperlipidemias/complicações , Estudos Retrospectivos
14.
Transl Psychiatry ; 14(1): 371, 2024 Sep 12.
Artigo em Inglês | MEDLINE | ID: mdl-39266518

RESUMO

Observational and genetic studies have reported the relationship between dyslexia and Alzheimer's disease (AD). Until now, the causal effect of dyslexia on AD risk has remained unclear. We conducted a two-sample univariable Mendelian randomization (MR) analysis to determine the causal association between dyslexia and the risk of AD, vascular dementia (VD), Lewy body dementia (LBD), and frontotemporal dementia (FTD) and its four subtypes. First, we selected 42 dyslexia genetic variants from a large-scale genome-wide association studies (GWAS) dataset and extracted their corresponding GWAS summary statistics from AD, VD, LBD, and FTD. Second, we selected four MR methods, including inverse-variance weighted (IVW), weighted median, MR-Egger, and MR-PRESSO. Heterogeneity, horizontal pleiotropy, and leave-one-out sensitivity analysis were then used to evaluate the reliability of all causal estimates. We also conducted multivariable MR (MVMR) and mediation analysis to assess the potential mediating role of cognitive performance (CP) or educational achievement (EA) on the causal association between dyslexia and AD. Two MVMR methods, including MV IVW and MV-Egger, and two-step MR were used to perform the analysis. Using IVW, we found a significant causal association between increased dyslexia and increased risk of AD (OR = 1.15, 95% CI: 1.04-1.28, P = 0.006), but not VD, LBD, FTD, or its four subtypes. MR-PRESSO further supported the statistically significant association between dyslexia and AD (OR = 1.15, 95% CI: 1.05-1.27, P = 0.006). All sensitivity analyses confirmed the reliability of causal estimates. Using MV IVW and mediation analysis, we found no causal relationship between dyslexia and AD after adjusting for CP but not EA, CP mediated the total effect of dyslexia on AD with a proportion of 46.32%. We provide genetic evidence to support a causal effect of increased dyslexia on increased risk of AD, which was largely mediated by CP. Reading activity may be a potential intervention strategy for AD by improving cognitive function.


Assuntos
Doença de Alzheimer , Dislexia , Demência Frontotemporal , Estudo de Associação Genômica Ampla , Análise da Randomização Mendeliana , Humanos , Dislexia/genética , Demência Frontotemporal/genética , Doença de Alzheimer/genética , Doença por Corpos de Lewy/genética , Demência Vascular/genética , Demência/genética , Demência/etiologia , Demência/epidemiologia , Fatores de Risco , Causalidade
15.
BMC Med Genomics ; 17(1): 180, 2024 Jul 05.
Artigo em Inglês | MEDLINE | ID: mdl-38970023

RESUMO

BACKGROUND: There is an association between migraine and dementia, however, their causal relationship remains unclear. This study employed bidirectional two-sample Mendelian randomization (MR) to investigate the potential causal relationship between migraine and dementia and its subtypes: Alzheimer's disease (AD), vascular dementia (VaD), frontotemporal dementia (FTD), and dementia with Lewy bodies (DLB). METHODS: Summary-level statistics data were obtained from publicly available genome-wide association studies (GWAS) for both migraine and five types of dementia. Single nucleotide polymorphisms (SNPs) associated with migraine and each dementia subtype were selected. MR analysis was conducted using inverse variance weighting (IVW) and weighted median (WM) methods. Sensitivity analyses included Cochran's Q test, MR pleiotropy residual sum and outlier (MR-PRESSO) analysis, the intercept of MR-Egger, and leave-one-out analysis. RESULTS: Migraine showed a significant causal relationship with AD and VaD, whereas no causal relationship was observed with all-cause dementia, FTD, or DLB. Migraine may be a potential risk factor for AD (odds ratio [OR]: 1.09; 95% confidence interval [CI]: 0.02-0.14; P = 0.007), while VaD may be a potential risk factor for migraine (OR: 1.04; 95% CI: 0.02-0.06; P = 7.760E-5). Sensitivity analyses demonstrated the robustness of our findings. CONCLUSION: Our study suggest that migraine may have potential causal relationships with AD and VaD. Migraine may be a risk factor for AD, and VaD may be a risk factor for migraine. Our study contributes to unraveling the comprehensive genetic associations between migraine and various types of dementia, and our findings will enhance the academic understanding of the comorbidity between migraine and dementia.


Assuntos
Demência , Estudo de Associação Genômica Ampla , Análise da Randomização Mendeliana , Transtornos de Enxaqueca , Polimorfismo de Nucleotídeo Único , Humanos , Transtornos de Enxaqueca/genética , Transtornos de Enxaqueca/complicações , Demência/genética , Predisposição Genética para Doença
16.
Zookeys ; 1193: 145-160, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38487668

RESUMO

The genus Svistella Gorochov, 1987 includes 10 species from Asia, with nine documented in China. In this study, a new species, Svistellayayun He, sp. nov., is described from Xizang, China. Morphologically, it resembles S.rufonotata (Chopard, 1932) but can be distinguished by a smaller inner tympanum, dark-brown setae on the 5th segment of the maxillary palp, and a rounded apex on the ectoparamere. To validate our morphological inferences and support the description of S.yayunsp. nov. as a new species, we performed a PCA based on bioacoustics parameters and molecular analysis. All Svistella species documented in China are distinguished by integrating their songs and DNA barcoding.

17.
Chemosphere ; 342: 140218, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37734503

RESUMO

The impact of high antibiotic and heavy metal pollution levels on biological nitrogen removal in wastewater treatment plants (WWTPs) remains poorly understood, posing a global concern regarding the issue spread of antibiotic resistance induced by these contaminants. Herein, we investigated the effects of gadolinium (Gd) and sulfamethoxazole (SMX), commonly found in medical wastewater, on biological nitrogen removal systems and microbial characteristics, and the fate of antibiotic resistance genes (ARGs), metal resistance genes (MRGs), and mobile genetic elements (MGEs). Our findings indicated that high SMX and Gd(III) concentrations adversely affected nitrification and denitrification, with Gd(III) exerting a strong inhibitory effect on microbial activity. Metagenomic analysis revealed that high SMX and Gd(III) concentrations could reduce microbial diversity, with Thauera and Pseudomonas emerging as dominant genera across all samples. While the relative abundance of most ARGs decreased under single Gd(III) stress, MRGs increased, and nitrification functional genes were inhibited. Conversely, combined SMX and Gd(III) pollution increased the relative abundance of intl1. Correlation analysis revealed that most genera could host ARGs and MRGs, indicating co-selection and competition between these resistance genes. However, most denitrifying functional genes exhibited a positive correlation with MRGs. Overall, our study provides novel insights into the impact of high concentrations of antibiotics and heavy metal pollution in WWTPs, and laying the groundwork for the spread and proliferation of resistance genes under combined SMX and Gd pollution.


Assuntos
Metais Pesados , Microbiota , Sulfametoxazol/farmacologia , Gadolínio , Desnitrificação , Nitrogênio , Genes Bacterianos , Antibacterianos/farmacologia
18.
Cranio ; 41(5): 454-460, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-33423621

RESUMO

OBJECTIVE: To explore the correlation between hyoid bone (HB) positions and facial growth patterns (facial patterns) in Chinese adults; to identify any significant difference in HB position among subjects with different facial patterns in various dental ages. METHODS: Lateral cephalometric radiographs of 197 Chinese subjects were divided into nine groups based on their dental ages and facial patterns. Seven measurements were used to define HB position. Regression, correlation analyses, and one-way ANOVA were carried out. RESULTS: Significant correlations were found between facial patterns and anteroposterior HB positions. The HB was more anterior in the horizontal group after mixed dentition and further away from the mandibular plane in the vertical group of adults. Vertical HB positions were insignificantly different in any stage. CONCLUSION: HB position and facial patterns were correlated. There were significantly different HB positions among people with different facial patterns in various dental ages.


Assuntos
Face , Osso Hioide , Adulto , Humanos , Osso Hioide/diagnóstico por imagem , Face/diagnóstico por imagem , Face/anatomia & histologia , Mandíbula/diagnóstico por imagem , Cefalometria , Radiografia
19.
J Control Release ; 362: 44-57, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37579978

RESUMO

Insufficient tumor accumulation and distribution of immunogenic cell death (ICD) inducer as well as low antitumor immunity severely restrict the therapeutic efficacy of tumor immunotherapy. Tumor associated fibroblasts (TAFs) are important in tumor extracellular matrix (ECM) remodeling and immune evasion. Reprogramming tumor immunosuppressive microenvironment via TAFs regulation might present a promising way for enhanced ICD effect and complete tumor elimination. In this study, TAFs derived tryptase imprinted nanoparticles (DMSN@MIPs) are developed to modulate TAFs and improve tumor immunotherapy effect of doxorubicin liposomes (DOX/LIP). Tryptase (TPS), secreted by mast cells, are found to support tumor growth via transcriptionally activating TAFs to an activated state with increased expression of fibroblast activation marker α-smooth muscle actin (α-SMA). DMSN@MIPs canbe used as artificial antibodies, which effectively neutralize TPS, reduce TAFs activation, promote intra-tumor penetration of DOX/LIP and enhance ICD effect induced by DOX/LIP. In addition, the combined administration system remodels immunosuppressive microenvironment, which not only significantly up-regulates immune cells (DC cells, CD8+T cells, NK cells), but also significantly down-regulates immunosuppressive cells (Treg cells, MDSCs cells). Our results support the DMSN@MIPs canbe a promising approach to improve ICD efficacy in cancer immunotherapy.

20.
ACS Biomater Sci Eng ; 9(2): 662-670, 2023 02 13.
Artigo em Inglês | MEDLINE | ID: mdl-36732940

RESUMO

The hallmark of orthodontic tooth movement (OTM) is time-consuming during clinical treatments. The acceleration of OTM through modulating proliferation and apoptosis of periodontal ligament cells (PDLCs) possesses the potential application in clinical treatments. Here, we established an in vitro model with a graded increase in substrate stiffness to investigate the underlying mechanism of proliferation and apoptosis of PDLCs. The role of the integrin-linked kinase (ILK) in response to substrate stiffness was investigated by the depletion model of PDLCs. We found that the proliferation and apoptosis of PDLCs show a stiffness-dependent property with stiffer substrates favoring increased bias at the transcript level. Depleting integrin-linked kinase diluted the correlation between PDLCs behaviors and substrate stiffness. Our results suggest that ILK plays a significant role in modulating PDLC proliferation and apoptosis and can serve as a potential target for accelerating OTM.


Assuntos
Apoptose , Ligamento Periodontal , Proliferação de Células , Proteínas Serina-Treonina Quinases/genética , Humanos
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