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1.
Discov Oncol ; 15(1): 229, 2024 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-38877340

RESUMO

Multiple myeloma (MM) denotes a cancerous growth characterized by abnormal proliferation of plasma cells. Growing evidence suggests that the complexity in addressing MM lies in the presence of minimal residual disease (MRD) within the body. MRD assessment is becoming increasingly important for risk assessment in patients with MM. Similarly, the levels of serum free protein light chain and their ratio play a crucial role in assessing the disease burden and changes in MM. In this paper, we review and explore the utilization of MRD and serum free light chain ratio in the treatment of MM, delving into their respective characteristics, advantages, disadvantages, and their interrelation.

2.
Arch. endocrinol. metab. (Online) ; 68: e220491, 2024. tab, graf
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-1533663

RESUMO

SUMMARY Primary pigmented nodular adrenocortical disease (PPNAD) is a rare adrenocorticotropin hormone (ACTH)-independent Cushing's syndrome (CS). Pediatric patients with PPNAD typically have unusual skin lesions and slow growth with unknown causes. We present a case of a female Chinese patient with PPNAD caused by the germline PRKACA gene copy number gain of chromosome 19. The patient initially presented with kidney stones, short stature, and obesity. After further testing, it was discovered that the patient had diabetes, mild hypertension, low bone mass, a low ACTH level, and hypercortisolemia, and neither the low-dose or high-dose dexamethasone suppression test was able to inhibit hematuric cortisol, which paradoxically increased. PPNAD was pathologically diagnosed after unilateral adrenalectomy. Chromosome microarrays and whole exon sequencing analyses of the peripheral blood, as well as testing of sectioned adrenal tissue, showed a rise in the copy number of the duplication-containing PRKACA gene on chromosome 19p13.13p13.12, a de novo but not heritable gene defect that causes disease. The clinical signs and symptoms supported the diagnosis of Carney complex (CNC). One significant mechanism of CNC pathogenesis may be the rise in germline PRKACA copy number of chromosome 19. When assessing PPNAD patients for CNC, the possibility of PRKACA gene amplification should be considered. The effect of PRKACA gene amplification on the clinical manifestations of CNC needs to be confirmed by more cases.

3.
J Health Psychol ; 29(5): 396-409, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38102739

RESUMO

This study aimed to examine the linear and non-linear relationship between explicit and implicit social support and psychological adjustment as well as the underlying interpersonal mechanisms in a sample of Chinese women with breast cancer (n = 202). The results showed that explicit social support was associated with poorer psychological adjustment, while implicit social support exhibited the opposite trend. Moreover, the association between implicit social support and psychological adjustment was stronger at lower levels of implicit social support, but it weakened or disappeared at moderate or higher levels. Furthermore, we found that all the associations between social support and psychological adjustment could be explained by relationship concerns and perceived burdensomeness. These findings emphasize the importance of providing social support and supportive care to patients who have unmet supportive care needs, in line with cultural norms and expectations.


Assuntos
Neoplasias da Mama , Humanos , Feminino , Neoplasias da Mama/psicologia , Ajustamento Emocional , Apoio Social , China
4.
Arch Endocrinol Metab ; 68: e220491, 2023 Nov 17.
Artigo em Inglês | MEDLINE | ID: mdl-37988664

RESUMO

Primary pigmented nodular adrenocortical disease (PPNAD) is a rare adrenocorticotropin hormone (ACTH)-independent Cushing's syndrome (CS). Pediatric patients with PPNAD typically have unusual skin lesions and slow growth with unknown causes. We present a case of a female Chinese patient with PPNAD caused by the germline PRKACA gene copy number gain of chromosome 19. The patient initially presented with kidney stones, short stature, and obesity. After further testing, it was discovered that the patient had diabetes, mild hypertension, low bone mass, a low ACTH level, and hypercortisolemia, and neither the low-dose or high-dose dexamethasone suppression test was able to inhibit hematuric cortisol, which paradoxically increased. PPNAD was pathologically diagnosed after unilateral adrenalectomy. Chromosome microarrays and whole exon sequencing analyses of the peripheral blood, as well as testing of sectioned adrenal tissue, showed a rise in the copy number of the duplication-containing PRKACA gene on chromosome 19p13.13p13.12, a de novo but not heritable gene defect that causes disease. The clinical signs and symptoms supported the diagnosis of Carney complex (CNC). One significant mechanism of CNC pathogenesis may be the rise in germline PRKACA copy number of chromosome 19. When assessing PPNAD patients for CNC, the possibility of PRKACA gene amplification should be considered. The effect of PRKACA gene amplification on the clinical manifestations of CNC needs to be confirmed by more cases.


Assuntos
Doenças do Córtex Suprarrenal , Síndrome de Cushing , Humanos , Criança , Feminino , Doenças do Córtex Suprarrenal/genética , Doenças do Córtex Suprarrenal/diagnóstico , Doenças do Córtex Suprarrenal/patologia , Síndrome de Cushing/genética , Adrenalectomia/efeitos adversos , Hidrocortisona , Hormônio Adrenocorticotrópico , Subunidades Catalíticas da Proteína Quinase Dependente de AMP Cíclico
5.
Amino Acids ; 55(8): 1063-1071, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-37341830

RESUMO

Diabetes Mellitus (DM) is one of the most important public health problems, and new antidiabetic drugs with fewer side effects are urgently needed. Here, we measured the antidiabetic effects of an antioxidant peptide (Ala-Phe-Tyr-Arg-Trp, AFYRW) from Tartary Buckwheat Albumin (TBA) in a high-fat diet/streptozotocin (HFD/STZ)-induced diabetic mouse model. The data showed that AFYRW suppressed hepatocyte steatosis and triglycerides while ameliorating insulin resistance in mice. Successively, the influence of AFYRW on aberrant protein glycosylation in diabetic mice was further investigated by lectin microarrays. The results suggested AFYRW could restore the expression of GalNAc, GalNAcα1-3Gal and GalNAcα1-3Galß1-3/4Glc recognized by PTL-I, Siaα2-3Galß1-4Glc(NAc)/Glc, Siaα2-3Gal, Siaα2-3 and Siaα2-3GalNAc recognized by MAL-II, terminating in GalNAcα/ß1-3/6Gal recognized by WFA and αGalNAc, αGal, anti-A and B recognized by GSI-I to normal levels in the pancreas of HFD-STZ-induced diabetic mice. This work may provide new targets for the future discovery of potential biomarkers to evaluate the efficacy of food-derived antidiabetic drugs based on precise alterations of glycopatterns in DM.


Assuntos
Diabetes Mellitus Experimental , Fagopyrum , Camundongos , Animais , Hipoglicemiantes/farmacologia , Fagopyrum/metabolismo , Glicosilação , Diabetes Mellitus Experimental/tratamento farmacológico , Diabetes Mellitus Experimental/metabolismo , Pâncreas/metabolismo , Peptídeos/farmacologia , Glicemia/metabolismo
6.
J Immunother Cancer ; 11(2)2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36759015

RESUMO

BACKGROUND: Tertiary lymphoid structures (TLSs) have been proposed to assess the prognosis of patients with cancer. Here, we investigated the prognostic value and relevant mechanisms of TLSs in colorectal cancer liver metastases (CRCLM). METHODS: 603 patients with CRCLM treated by surgical resection from three cancer centers were included. The TLSs were categorized according to their anatomic subregions and quantified, and a TLS scoring system was established for intratumor region (T score) and peritumor region (P score). Differences in relapse-free survival (RFS) and overall survival (OS) between groups were determined. Multiplex immunohistochemical staining (mIHC) was used to determine the cellular composition of TLSs in 40 CRCLM patients. RESULTS: T score positively correlated with superior prognosis, while P score negatively associated with poor survival (all p<0.05). Meanwhile, T score was positively associated with specific mutation subtype of KRAS. Furthermore, TLSs enrichment gene expression was significantly associated with survival and transcriptomic subtypes of CRCLM. Subsequently, mIHC showed that the densities of Treg cells, M2 macrophages and Tfh cells were significantly higher in intratumor TLSs than in peritumor TLSs (p=0.029, p=0.047 and p=0.041, respectively), and the frequencies of Treg cells and M2 macrophages were positively correlated with P score, while the frequencies of Tfh cells were positively associated with T scores in intratumor TLSs (all p<0.05). Next, based on the distribution and abundance of TLSs, an Immune Score combining T score and P score was established which categorized CRCLM patients into four immune classes with different prognosis (all p<0.05). Among them, patients with higher immune class have more favorable prognoses. The C-index of Immune Class for RFS and OS was higher than Clinical Risk Score statistically. These results were also confirmed by the other two validation cohorts. CONCLUSIONS: The distribution and abundance of TLSs is significantly associated with RFS and OS of CRCLM patients, and a novel immune class was proposed for predicting the prognosis of CRCLM patients.


Assuntos
Neoplasias Colorretais , Neoplasias Hepáticas , Estruturas Linfoides Terciárias , Humanos , Linfócitos do Interstício Tumoral , Recidiva Local de Neoplasia/patologia , Neoplasias Hepáticas/patologia , Neoplasias Colorretais/patologia
7.
Phys Chem Chem Phys ; 24(15): 8940-8949, 2022 Apr 13.
Artigo em Inglês | MEDLINE | ID: mdl-35373801

RESUMO

To gain insights into the mechanisms of plasma chemical product interactions, the dynamic changes of the surface dielectric barrier discharge (SDBD) products are experimentally related to the reduced electric field and gas temperature. The higher applied voltage and frequency cause faster product changes from the O3-containing to the O3-free state, while raising the electron energy and gas temperature. The electron energy affects the electron collision reactions and the production of various reactive species, steering the chemical reactions towards the predominant production of NO over O3. The gas temperature affects the generation and quenching rates of the key products. Collectively, this work bridges macro-physical parameters and micro-chemical mechanisms through the electron energy and gas temperature effects, and contributes to better understanding of the physico-chemical processes in low-temperature plasmas.

9.
BMC Cancer ; 21(1): 619, 2021 May 26.
Artigo em Inglês | MEDLINE | ID: mdl-34039308

RESUMO

BACKGROUND: Mitochondrial fission regulator 2 (MTFR2) was involved in the progression and development of various cancers. However, the relationship between MTFR2 with lung adenocarcinoma (LUAD) had not been reported. Herein, this study analyzed the clinical significance and potential mechanisms of MTFR2 in LUAD via bioinformatics tools. RESULTS: We found that the level of MTFR2 was increased, and correlated with sex, age, smoking history, neoplasm staging, histological subtype and TP53 mutation status in LUAD patients. Kaplan-Meier survival analysis showed LUAD patients with increased MTFR2 had a poor prognosis. In addition, univariate COX regression analysis showed neoplasm staging, T stage, distant metastasis and MTFR2 level were risk factors for the prognosis of LUAD. A total of 1127 genes were coexpressed with MTFR2, including 840 positive and 208 negative related genes. KEGG and GSEA found that MTFR2 participated in the progression of LUAD by affecting cell cycle, DNA replication, homologous recombination, p53 signaling pathway and other mechanisms. The top 10 coexpressed genes, namely CDK1, CDC20, CCNB1, PLK1, CCNA2, AURKB, CCNB2, BUB1B, MAD2L1 and BUB1 were highly expressed, and were associated with poor prognosis in LUAD. CONCLUSIONS: Consequently, we elucidated MTFR2 was a biomarker for diagnosis and poor prognosis in LUAD, and might participate in the progression of LUAD via affecting cell cycle, DNA replication, homologous recombination and p53 signaling pathway.


Assuntos
Adenocarcinoma de Pulmão/genética , Biomarcadores Tumorais/genética , Neoplasias Pulmonares/diagnóstico , Proteínas Mitocondriais/genética , Adenocarcinoma de Pulmão/diagnóstico , Adenocarcinoma de Pulmão/mortalidade , Adenocarcinoma de Pulmão/terapia , Adulto , Idoso , Idoso de 80 Anos ou mais , Biologia Computacional , Conjuntos de Dados como Assunto , Intervalo Livre de Doença , Feminino , Perfilação da Expressão Gênica , Regulação Neoplásica da Expressão Gênica , Humanos , Estimativa de Kaplan-Meier , Pulmão/patologia , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/mortalidade , Masculino , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/diagnóstico , Recidiva Local de Neoplasia/genética , Recidiva Local de Neoplasia/mortalidade , Estadiamento de Neoplasias , Prognóstico , Regulação para Cima
10.
Biomed Environ Sci ; 34(1): 9-18, 2021 Jan 20.
Artigo em Inglês | MEDLINE | ID: mdl-33531103

RESUMO

OBJECTIVE: The relationship between serum uric acid (SUA) levels and glycemic indices, including plasma glucose (FPG), 2-hour postload glucose (2h-PG), and glycated hemoglobin (HbA1c), remains inconclusive. We aimed to explore the associations between glycemic indices and SUA levels in the general Chinese population. METHODS: The current study was a cross-sectional analysis using the first follow-up survey data from The China Cardiometabolic Disease and Cancer Cohort Study. A total of 105,922 community-dwelling adults aged ≥ 40 years underwent the oral glucose tolerance test and uric acid assessment. The nonlinear relationships between glycemic indices and SUA levels were explored using generalized additive models. RESULTS: A total of 30,941 men and 62,361 women were eligible for the current analysis. Generalized additive models verified the inverted U-shaped association between glycemic indices and SUA levels, but with different inflection points in men and women. The thresholds for FPG, 2h-PG, and HbA1c for men and women were 6.5/8.0 mmol/L, 11.0/14.0 mmol/L, and 6.1/6.5, respectively (SUA levels increased with increasing glycemic indices before the inflection points and then eventually decreased with further increases in the glycemic indices). CONCLUSION: An inverted U-shaped association was observed between major glycemic indices and uric acid levels in both sexes, while the inflection points were reached earlier in men than in women.


Assuntos
Índice Glicêmico , Ácido Úrico/sangue , Idoso , Povo Asiático , Glicemia/análise , China/epidemiologia , Estudos de Coortes , Diabetes Mellitus/sangue , Feminino , Teste de Tolerância a Glucose , Hemoglobinas Glicadas/análise , Humanos , Masculino , Pessoa de Meia-Idade
11.
Biosens Bioelectron ; 174: 112738, 2021 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-33257185

RESUMO

The high expression of sonic hedgehog ligand (SHh) is closely correlated to the metastasis, drug resistance and poor prognosis of hepatocellular carcinoma (HCC). Therefore, sensitive, specific and efficient detection methods for SHh are needed for the early diagnosis and assessment of prognosis. Herein, an aptamer, AP32 that specifically binds to SHh (KD = 25.7 ± 4.1 nM) was obtained by SELEX technology with further optimization. In vivo experiments confirmed that AP32 has the potential to be an imaging probe for Huh-7 cell-derived xenograft. The interaction mode in 3-dimensional configuration between the aptamer and SHh was established by molecular simulation and confirmed by mutations at key sites of the aptamer. An aptasensor-based assay was successfully developed by conjugating Texas-Red-labeled AP32 to microbeads, and was used to analyze SHh content in hepatoma cell lysates, serum and HCC specimens. The method exhibited a broad detection range from 0.07 to 62.5 nM with a low detection limit of 69 pM, and a recovery rate of 104.6 ± 3.9% in serum. When the assay was used to measure SHh content in tissue lysates, the results demonstrated that it possessed 57.1% positivity, 100% specificity in distinguishing 28 HCC specimens from normal tissues, and was compensatory for detection of HCC in AFP-negative cases. Moreover, elevated SHh levels are indicative of portal vein invasion at 77.8% positive rate. This novel aptasensor-based SHh assay may offer a reliable means in predicting early metastasis and poor prognosis in hepatocellular carcinoma.


Assuntos
Técnicas Biossensoriais , Carcinoma Hepatocelular , Neoplasias Hepáticas , Carcinoma Hepatocelular/diagnóstico , Carcinoma Hepatocelular/genética , Proteínas Hedgehog/genética , Humanos , Ligantes , Neoplasias Hepáticas/genética , Veia Porta
12.
Polymers (Basel) ; 12(9)2020 Sep 22.
Artigo em Inglês | MEDLINE | ID: mdl-32971766

RESUMO

This paper uses polypropylene (PP) as the matrix and acrylic acid (AA) and maleic anhydride (MAH) as functional monomers to prepare PP-g-(AA-MAH) fibers by suspension grafting and melt-blown spinning technology that are easy to industrially scale-up. The fibers can be used to adsorb aniline. Results showed that the grafting ratio reached the maximum of 12.47%. The corresponding optimal conditions were grafting time of 3 h, AA: MAH = 0.75, total monomer content of 55%, benzoyl peroxide 1.4%, xylene concentration of 6 mL/g PP, and deionized water content of 8 mL/g PP. Owing to its good fluidity and thermal stability, the product of suspension grafting can be used for melt-blown spinning. Infrared spectroscopic and nuclear magnetic resonance spectroscopic analyses indicated that AA and MAH were successfully grafted onto PP fibers. After grafting, the hydrophilicity of PP-g-(AA-MAH) fiber increased. Therefore, it had higher absorptivity for aniline and the adsorption capacity could reach 42.2 mg/g at 45 min and pH = 7. Moreover, the PP-g-(AA-MAH) fibers showed good regeneration performance.

13.
CNS Neurosci Ther ; 26(4): 475-485, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-32187449

RESUMO

INTRODUCTION: Glioblastoma (GBM) is identified as a lethal malignant tumor derived from the nervous system. Despite the standard clinical strategy including maximum surgical resection, temozolomide (TMZ) chemotherapy, and radiotherapy, the median survival of GBM patients remains <15 months. Accumulating evidence indicates that rapid-acquired radioresistance is one of the most common reasons for GBM recurrence. Therefore, developing novel therapeutic targets for radioresistant GBM could yield long-term cures. AIMS: To investigate the functional role of CXCL1 in the acquired radioresistance and identify the molecular pathway correlated to CXCL1. RESULTS: In this study, we identified that CXCL1 is highly expressed in GBM and the elevation of CXCL1 is involved in radioresistance and poor prognosis in GBM patients. Additionally, silencing CXCL1 attenuated the proliferation and radioresistance of GBM cells. Furthermore, we demonstrated that CXCL1-overexpression induced radioresistance through mesenchymal transition of GBM via the activation of nuclear factor-kappa B (NF-κB) signaling. CONCLUSION: CXCL1 was highly enriched in GBM and positively correlated with poor prognosis in GBM patients. Additionally, elevated CXCL1 induced radioresistance in GBM through regulation of NF-κB signaling by promoting mesenchymal transition in GBM.


Assuntos
Neoplasias Encefálicas/metabolismo , Neoplasias Encefálicas/radioterapia , Quimiocina CXCL1/biossíntese , Glioblastoma/metabolismo , Glioblastoma/radioterapia , Células-Tronco Mesenquimais/metabolismo , Animais , Biomarcadores Tumorais/biossíntese , Linhagem Celular Tumoral , Transição Epitelial-Mesenquimal/fisiologia , Feminino , Humanos , Masculino , Células-Tronco Mesenquimais/efeitos da radiação , Camundongos , Camundongos Nus , Prognóstico , Taxa de Sobrevida/tendências , Ensaios Antitumorais Modelo de Xenoenxerto/métodos
14.
J Cell Mol Med ; 24(7): 4298-4311, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-32108992

RESUMO

Multidrug resistance is one of the reasons for low survival of advanced hepatocellular carcinoma (HCC). Our previous studies indicate that the hedgehog signalling is involved in hepatic carcinogenesis, metastasis and chemo-resistance. The present study aims to uncover molecular mechanisms underlying hepatoma chemo-resistance. TAP1 and GLI1/2 gene expression was assessed in both poorly differentiated hepatoma cells and HCC specimens. Potential GLI-binding site in the TAP1 promoter sequence was validated by molecular assays. Approximately 75% HCC specimens exhibited an elevated expression of hedgehog GLI1 transcription factor compared with adjacent liver tissue. Both GLI1/2 and TAP1 protein levels were significantly elevated in poorly differentiated hepatoma cells. Both Huh-7-trans and Huh-7-DN displayed more karyotypic abnormalities and differential gene expression profiles than their native Huh-7 cells. Sensitivity to Sorafenib, doxorubicin and cisplatin was remarkably improved after either GLI1 or TAP1 gene was inhibited by an RNAi approach or by a specific GLI1/2 inhibitor, GANT61. Further experiments confirmed that hedgehog transcription factor GLI1/2 binds to the TAP1 promoter, indicating that TAP1 is one of GLI1/2 target genes. In conclusion, TAP1 is under direct transcriptional control of the hedgehog signalling. Targeting hedgehog signalling confers a novel insight into alleviating drug resistance in the treatment of refractory HCC.


Assuntos
Membro 2 da Subfamília B de Transportadores de Cassetes de Ligação de ATP/genética , Carcinoma Hepatocelular/tratamento farmacológico , Neoplasias Hepáticas/tratamento farmacológico , Proteínas Nucleares/antagonistas & inibidores , Proteína GLI1 em Dedos de Zinco/antagonistas & inibidores , Proteína Gli2 com Dedos de Zinco/antagonistas & inibidores , Carcinogênese/efeitos dos fármacos , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/patologia , Linhagem Celular Tumoral , Proteínas de Ligação a DNA/antagonistas & inibidores , Proteínas de Ligação a DNA/genética , Resistencia a Medicamentos Antineoplásicos/genética , Feminino , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Proteínas Hedgehog/antagonistas & inibidores , Proteínas Hedgehog/genética , Humanos , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/patologia , Masculino , Proteínas Nucleares/genética , Regiões Promotoras Genéticas/genética , Piridinas/farmacologia , Pirimidinas/farmacologia , Transdução de Sinais , Proteína GLI1 em Dedos de Zinco/genética , Proteína Gli2 com Dedos de Zinco/genética
15.
CNS Neurosci Ther ; 26(3): 297-308, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-31318172

RESUMO

INTRODUCTION: Glioblastoma (GBM) is the most lethal primary malignant brain tumor in adults with poor survival due to acquired therapeutic resistance and rapid recurrence. Currently, the standard clinical strategy for glioma includes maximum surgical resection, radiotherapy, and temozolomide (TMZ) chemotherapy; however, the median survival of patients with GBM remains poor despite these comprehensive therapies. Therefore, the identification of new prognostic biomarkers is urgently needed to evaluate the malignancy and long-term outcome of glioma. AIMS: To further investigate prognostic biomarkers and potential therapeutic targets for GBM. RESULTS: In this study, we identified tribbles pseudokinase 2 (TRIB2) as one of the genes that is most correlated with pathological classification, radioresistance, and TMZ resistance in glioma. Additionally, the expression of mitogen-activated protein kinase kinase kinase 1 (MAP3K1) showed a strong correlation with TRIB2. Moreover, a combined increase in TRIB2 and MAP3K1 was observed in GBM and indicated a poor prognosis of patients with glioma. Finally, enriched TRIB2 expression and MAP3K1 expression were shown to be associated with resistance to TMZ and radiotherapy. CONCLUSION: Combined elevation of TRIB2 and MAP3K1 could be novel prognostic biomarkers and potential therapeutic targets to evaluate the malignancy and long-term outcomes of GBM.


Assuntos
Neoplasias Encefálicas/metabolismo , Proteínas Quinases Dependentes de Cálcio-Calmodulina/biossíntese , Resistencia a Medicamentos Antineoplásicos/efeitos dos fármacos , Glioblastoma/metabolismo , MAP Quinase Quinase Quinase 1/biossíntese , Temozolomida/uso terapêutico , Adulto , Antineoplásicos Alquilantes/uso terapêutico , Neoplasias Encefálicas/tratamento farmacológico , Neoplasias Encefálicas/patologia , Resistencia a Medicamentos Antineoplásicos/fisiologia , Feminino , Regulação Neoplásica da Expressão Gênica , Glioblastoma/tratamento farmacológico , Glioblastoma/patologia , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico
16.
CNS Neurosci Ther ; 26(7): 777, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-31578804

RESUMO

Retraction: Receptor tyrosine kinase AXL is correlated with poor prognosis and induces temozolomide resistance in glioblastoma, CNS Neuroscience & Therapeutics 2019, (https://doi.org/10.1111/cns.13227). The above article published online on 02 October 2019 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors, the journal Editor in Chief Jun Chen, and John Wiley & Sons Ltd. The retraction has been agreed due to unreliable data and consequently its misleading results and conclusions.

17.
Artigo em Inglês | MEDLINE | ID: mdl-31668814

RESUMO

This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/our-business/policies/article-withdrawal.

18.
Life Sci ; 236: 116917, 2019 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-31614149

RESUMO

AIMS: To investigate the underlying mechanism by which glioblastoma (GBM) cells gain temozolomide (TMZ) resistance and to clarify novel therapeutic targets and new prognostic biomarkers for GBM. MAIN METHODS: A genome-wide hierarchical bi-clustering based on previously published microarray databases identified Nuclear Factor I A (NFIA) as one of the most significantly upregulated genes correlated to TMZ resistance in GBM. Then, the potential biological functions of NFIA in oncogenesis and chemoresistance were clarified by qRT-PCR, Western blotting and in vivo xenograft models with artificially induced TMZ-resistant U87 cells. Additionally, immunohistochemistry (IHC) assays were performed to explore the clinical significance of NFIA in glioma patients. Last, luciferase reporter assay was performed to study the transcriptional regulation of NFIA on the nuclear factor κb (NF-kB) pathway. KEY FINDINGS: NFIA was correlated with TMZ resistance in GBM. Clinically, elevated NFIA expression was significantly correlated with adverse outcomes of glioma patients, especially in GBM patients. Moreover, NFIA contributed to the acquired TMZ resistance of GBM cells, while suppression of NFIA via lentivirus reduced cell proliferation, tumorigenesis and resistance to TMZ of GBM. Additionally, NFIA promoted transcription activity that regulated the expression of NF-kB. Last, NFIA induced phosphorylation of NF-kB p65 at serine 536, thus inducing TMZ resistance in GBM cells. Altogether, our study suggests that NFIA-dependent transcriptional regulation of NF-kB contributes to acquired TMZ resistance in GBM. SIGNIFICANCE: Abnormally activated NFIA-NF-kB signaling was strongly correlated with acquired TMZ resistance and poor prognosis in GBM, and it could be a new therapeutic target for TMZ-resistant GBM.


Assuntos
Neoplasias Encefálicas/patologia , Resistencia a Medicamentos Antineoplásicos , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Glioblastoma/patologia , NF-kappa B/metabolismo , Fatores de Transcrição NFI/metabolismo , Temozolomida/farmacologia , Animais , Antineoplásicos Alquilantes/farmacologia , Apoptose , Neoplasias Encefálicas/tratamento farmacológico , Neoplasias Encefálicas/genética , Neoplasias Encefálicas/metabolismo , Proliferação de Células , Feminino , Glioblastoma/tratamento farmacológico , Glioblastoma/genética , Glioblastoma/metabolismo , Humanos , Camundongos , Camundongos Nus , NF-kappa B/genética , Fatores de Transcrição NFI/genética , Prognóstico , Transdução de Sinais , Células Tumorais Cultivadas , Ensaios Antitumorais Modelo de Xenoenxerto
19.
Pathol Res Pract ; 215(11): 152617, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31563286

RESUMO

BACKGROUND: Recent studies have demonstrated that aberrant expression or activation of kinases results in oncogenesis of a wide range of cancers including GBM. Inhibition of kinases expression induces a reduction of therapy resistance. In this study, we investigate the underlying mechanism by which glioblastoma (GBM) cells acquire resistance to Temozolomide (TMZ) through Aurora kinase B (AURKB) thus to identify novel therapeutic targets and prognostic biomarkers for GBM. METHODS: AURKB was identified as a key candidate kinase-encoding gene in chemoresistance regulation by using kinome-wide bioinformatic analysis. Afterwards, the potential biological functions of AURKB in oncogenesis and chemoresistance were investigated by lentivirus-dependent silencing of AURKB combined with qRT-PCR, western blot and in vivo intra-cranial xenograft mice models. Additionally, immunohistochemistry (IHC) assays were performed to explore the clinical significance of AURKB in glioma patients. Lastly, Chou-Talalay method was used to confirm the synergistic effect of TMZ combined with AURKB inhibitor. RESULTS: AURKB was among the most significantly up-regulated kinase-coding genes in TMZ resistant GBM cells according to database GSE68029, moreover, an increased expression of AURKB was closely associated with poor prognosis in glioma and GBM patients. AURKB knock-down resensitized U87 resistant cells to TMZ both in vitro and in vivo. Additionally, the combination of TMZ and Hesperadin, a specific AURKB inhibitor, significantly suppressed the proliferation of TMZ resistant GBM cells thus dramatically prolonged the survival of xenograft mice viaa synergistic effect with TMZ. CONCLUSION: Elevated AURKB expression was strongly correlated to TMZ resistant acquisition and poor prognosis, furthermore, targeting AURKB would be a potential therapeutic target for GBM patients.


Assuntos
Aurora Quinase B/metabolismo , Resistencia a Medicamentos Antineoplásicos/efeitos dos fármacos , Glioblastoma/patologia , Indóis/farmacologia , Sulfonamidas/farmacologia , Temozolomida/farmacologia , Animais , Antineoplásicos/farmacologia , Aurora Quinase B/efeitos dos fármacos , Neoplasias Encefálicas/enzimologia , Neoplasias Encefálicas/patologia , Resistencia a Medicamentos Antineoplásicos/fisiologia , Sinergismo Farmacológico , Glioblastoma/enzimologia , Humanos , Camundongos , Ensaios Antitumorais Modelo de Xenoenxerto
20.
Pathol Res Pract ; 215(10): 152557, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31353228

RESUMO

OBJECTIVES: Aurora kinase B (AURKB) and Ubiquitin conjugating enzyme E2C (UBE2C) are involved in tumorigenesis of gliomas and other malignancies as well, but their clinicopathologic significance in gliomas is unknown and the prognostic value of combined expression of AURKB and UBE2C has not been explored. In this study, we investigate the correlation between glioma prognosis and combined expressions of AURKB and UBE2C thus to identify novel therapeutic targets and prognostic biomarkers for glioma patients. METHODS: AURKB was identified as one of the key candidate kinase-encoding genes in three different databases by using kinome-wide bioinformatic analysis. Afterwards, UBE2C was chosen as the most closely relevant genes to AURKB according to Spearman correlation test. Then the expressions of AURKB and UBE2C at either transcriptome or protein levels were measured by quantitative Real-time PCR (qRT-PCR) or immunohistochemistry (IHC), respectively. Additionally, Kaplan-Meier analyses were conducted using data from TCGA, Rembrandt and our clinical center to investigate the clinical significance of AURKB and UBE2C. Furthermore, receiver operating characteristic (ROC) analysis was performed to evaluate the sensitivity and specificity of AURKB and UBE2C in predicting the outcomes of glioma patients. Moreover, survival data of patients who underwent post-surgical chemo/radio treatment were extracted and the Kaplan-Meier analyses were performed to investigate the correlation between treatment resistance and combined expressions of AURKB and UBE2C. RESULTS: Both AURKB and UBE2C were significantly up-regulated in gliomas compared to normal brain tissues and the combined elevation of AURKB and UBE2C were strongly associated with histological classification in glioma. Moreover, overexpression of either AURKB or UBE2C strongly correlated to more severe overall survival. Notably, upregulation of these two genes revealed unfavorable outcomes (shorter overall survival and therapy resistance) in glioma patients with significant sensitivity and specificity. CONCLUSION: Simultaneously elevated expressions of AURKB and UBE2C was strongly correlated to poor prognosis and therapy resistance in glioma, furthermore, our data suggest for the first time that the combination of AURKB and UBE2C overexpression could be highly sensitive prognostic markers and potential therapeutic targets for glioma patients.


Assuntos
Aurora Quinase B/metabolismo , Neoplasias Encefálicas/metabolismo , Glioma/metabolismo , Enzimas de Conjugação de Ubiquitina/metabolismo , Adulto , Biomarcadores Tumorais/metabolismo , Neoplasias Encefálicas/mortalidade , Neoplasias Encefálicas/patologia , Neoplasias Encefálicas/cirurgia , Feminino , Regulação Neoplásica da Expressão Gênica , Glioma/mortalidade , Glioma/patologia , Glioma/cirurgia , Humanos , Imuno-Histoquímica , Masculino , Pessoa de Meia-Idade , Gradação de Tumores , Procedimentos Neurocirúrgicos , Prognóstico , Taxa de Sobrevida , Resultado do Tratamento
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