Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 57.740
Filtrar
1.
Spectrochim Acta A Mol Biomol Spectrosc ; 285: 121918, 2023 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-36179569

RESUMO

An easy and reliable method is optimized for extractive spectrophotometric assessment of platinum(IV) with 4-(4'-nitrobenzylideneimino)-3-methyl-5-mercapto-1,2,4-triazole as an extractant. The basis of this method is the formation of red platinum(IV) complex with the above reagent in acetate buffer medium (pH 5.0) and extraction in chloroform. Good linearity with regression equation as y = 1.011 × 104 ×  + 0.002 having correlation coefficient (R2) of 0.998 over concentration up to 17.5 µg mL-1 of platinum(IV) was achieved with apparent molar absorptivity of 1.011 × 104 L mol-1 cm-1. The limit of detection (0.22 µg mL-1), limit of quantification (0.73 µg mL-1) and Sandell's sensitivity (0.0193 µg cm-2) were also estimated. The interference of various cations was removed by using proper masking agents and consequently by using EDTA and citrate to mask certain transition metals, the method becomes highly specific for platinum(IV), including the effects of platinum group metals. The method is effectively used for determination of platinum(IV) from environmental and real samples such as alloys, catalysts, thermocouple wire and pharmaceutical sample.


Assuntos
Cisplatino , Platina , Espectrofotometria/métodos , Ligas , Indicadores e Reagentes
2.
J Ethnopharmacol ; 301: 115805, 2023 Jan 30.
Artigo em Inglês | MEDLINE | ID: mdl-36216195

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: Shenkang injection (SKI), a Chinese patent medicine injection, has been approved for the treatment of chronic kidney disease (CKD) due to its definite clinical therapeutic efficacy. However, the effect and associated underlying mechanism of Shenkang injection against cisplatin (CDDP)-induced acute kidney injury (AKI) has not yet been well elucidated. AIM OF THE STUDY: This study aims to investigate the therapeutic effect and associated underlying mechanism of Shenkang injection against CDDP-induced AKI. MATERIALS AND METHODS: We established a CDDP-induced AKI mouse model to evaluate renal function by biochemical markers measurement and to observe histopathological alterations by haemotoxylin and eosin (HE)-staining sections of renal. In addition, the distribution of representative components of SKI in the kidneys of mice was evaluated by liquid chromatography tandem mass spectrometry (LC-MS/MS). Furthermore, the degree of oxidative stress and inflammation were assessed by detecting the levels of inflammatory cytokines and oxidants, while the related mechanisms were elucidated by network pharmacology. RESULTS: CDDP could induce excessive inflammation and severe injury to the kidneys of mice. However, SKI significantly ameliorated the kidney damages and improved the renal function by reducing the levels of renal function markers (SCr, BUN and urine protein), and inhibiting the production of inflammatory cytokines IL-34, IL-6 and TNF-α. SKI repaired oxidative balance through up-regulation of antioxidants SOD and GSH and down-regulated oxidants MDA. Moreover, 4 components from SKI were detected in the kidney by LC-MS/MS quantification. In addition, pharmacology network indicated the PI3K/AKT, TNF, MAPK, and p53 were the possible signaling pathways for the therapeutic effect of SKI against CDDP-induced AKI, which were related to inflammation, oxidative stress and apoptosis. CONCLUSION: In the present study, we for the first time demonstrated that SKI alleviates CDDP-induced nephrotoxicity by antioxidant and anti-inflammation via regulating PI3K/AKT, MAPK, TNF, and p53 signaling pathways. The study may provide a scientific rationale for the clinical indication of SKI.


Assuntos
Injúria Renal Aguda , Cisplatino , Camundongos , Animais , Cisplatino/toxicidade , Cromatografia Líquida , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Proteína Supressora de Tumor p53/metabolismo , Espectrometria de Massas em Tandem , Injúria Renal Aguda/induzido quimicamente , Injúria Renal Aguda/tratamento farmacológico , Injúria Renal Aguda/metabolismo , Rim , Estresse Oxidativo , Apoptose , Inflamação/patologia , Antioxidantes/farmacologia , Oxidantes/metabolismo , Citocinas/metabolismo
3.
Mol Med Rep ; 27(1)2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36382656

RESUMO

Colorectal cancer (CRC) is one of the deadliest malignant tumors worldwide and its prevalence is increasing in South Korea. The efficacy of combined treatment with natural product­derived and chemotherapy agents including curcumin combined with 5­fluorouracil, resveratrol combined with cisplatin and epigallocatechin­3­gallate (EGCG) combined with cisplatin in preventing cancer progression and killing cancer cells has emerged. The Akt and Hippo signaling pathways serve a key role in colorectal tumor growth; however, the exact role of the crosstalk between Akt and Hippo signaling pathways in CRC remains poorly elucidated. The combined effect of UA and DOX on the cell proliferation, apoptosis, migration and cell cycle of CRC cells were investigated by performing Cell proliferation assay, a soft agar colony formation assay, flow cytometry, wound healing assay and western blotting assay. Subsequently, the expression of AKT and Hippo signaling pathway­associated proteins were also assessed by western blot assay. Moreover, a xenograft nude mouse model was constructed to verify the effects of UA and DOX on the tumorigenesis of HCT116 cell in vivo. The present study reported that ursolic acid (UA) strongly enhanced the antitumor action of doxorubicin (DOX) via blocking the Akt/glycogen synthase kinase­3ß (Gsk3ß) signaling pathway and activating tumor­suppressive Hippo signaling (mammalian Ste20­like kinase 1 and 2, salvador family WW domain containing protein 1 and MOB kinase activator 1), thereby downregulating downstream effector yes­associated protein 1 (Yap) and connective tissue growth factor (CTGF) protein expression levels in CRC cells. Furthermore, The PI3K inhibitor LY294002 further suppressed Akt activity and enhance the function of Hippo pathway­associated proteins in DOX + UA treated cells; this effect led to subsequent oncogenic Yap and CTGF inhibition following combined treatment, whereas Akt activator SC79 exerted an opposite effect in CTGF expression. In vivo, treatment with UA combined with DOX markedly suppressed the progression of CRC without any toxic effects on a xenograft mouse model by disrupting Akt signaling and activating the Hippo signaling pathway. These results demonstrated that UA and DOX treatment successfully induced Akt/Gsk3ß inactivation via Hippo signaling pathway activation to promote Yap degradation, resulting in the inhibition of colorectal tumorigenesis. In conclusion, these findings suggested that combination therapy with UA and DOX may be more effective than DOX alone. UA may be a novel anticancer strategy and could be considered for investigation as a complementary chemotherapy agent in the future.


Assuntos
Neoplasias Colorretais , Fosfatidilinositol 3-Quinases , Humanos , Camundongos , Animais , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Via de Sinalização Hippo , Cisplatino/farmacologia , Glicogênio Sintase Quinase 3 beta/metabolismo , Ensaios Antitumorais Modelo de Xenoenxerto , Transdução de Sinais , Carcinogênese , Proliferação de Células , Apoptose , Doxorrubicina/farmacologia , Neoplasias Colorretais/tratamento farmacológico , Mamíferos/metabolismo
4.
Anticancer Res ; 42(4): 2095-2104, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35347033

RESUMO

BACKGROUND/AIM: The standard of treatment for esophageal cancer with adjacent organ invasion (T4) has not been established. We retrospectively analyzed the clinical outcomes of radiotherapy (RT) in elderly and younger patients with T4 esophageal cancer. PATIENTS AND METHODS: Sixty-nine patients with T4 esophageal cancer who underwent RT at the Kanagawa Cancer Center between January 2014 and November 2020 were included in this study. Patients aged ≥70 years were defined as the elderly group and those aged <70 years were defined as the younger group. The total dose of RT was set at 60 Gy in 30 fractions. Chemotherapy combined with 5-fluorouracil and cisplatin was administered concurrently with RT in general. The overall survival (OS) rate was estimated using the Kaplan-Meier method. Adverse events were assessed using CTCAE v4.0. RESULTS: The median survival time (MST) of the elderly group (n=35) was 21.5 months, and the OS rates at 1, 3, and 5 years were 63.7%, 31.3%, and 15.6%, respectively. The MST of the younger group (n=34) was 12.5 months, and the OS rates at 1, 3, and 5 years were 52.2%, 29.4%, and 29.4%, respectively. No significant difference in OS was observed between the two groups (p=0.767). Toxicities were not significantly different between the two groups except for thrombocytopenia and esophageal fistula (p=0.012 and p=0.022, respectively). CONCLUSION: The clinical outcomes of RT for T4 esophageal cancer in elderly patients were generally similar to those in the younger group.


Assuntos
Carcinoma de Células Escamosas , Neoplasias Esofágicas , Idoso , Carcinoma de Células Escamosas/tratamento farmacológico , Carcinoma de Células Escamosas/radioterapia , Quimiorradioterapia/efeitos adversos , Quimiorradioterapia/métodos , Cisplatino/efeitos adversos , Neoplasias Esofágicas/tratamento farmacológico , Neoplasias Esofágicas/radioterapia , Humanos , Estudos Retrospectivos
5.
Mol Cancer ; 21(1): 37, 2022 02 07.
Artigo em Inglês | MEDLINE | ID: mdl-35130920

RESUMO

PURPOSE: The overall response of cisplatin-based chemotherapy in bladder urothelial carcinoma (BUC) remains unsatisfactory due to the complex pathological subtypes, genomic difference, and drug resistance. The genes that associated with cisplatin resistance remain unclear. Herein, we aimed to identify the cisplatin resistance associated genes in BUC. EXPERIMENTAL DESIGN: The cytotoxicity of cisplatin was evaluated in six bladder cancer cell lines to compare their responses to cisplatin. The T24 cancer cells exhibited the lowest sensitivity to cisplatin and was therefore selected to explore the mechanisms of drug resistance. We performed genome-wide CRISPR screening in T24 cancer cells in vitro, and identified that the gene heterogeneous nuclear ribonucleoprotein U (HNRNPU) was the top candidate gene related to cisplatin resistance. Epigenetic and transcriptional profiles of HNRNPU-depleted cells after cisplatin treatment were analyzed to investigate the relationship between HNRNPU and cisplatin resistance. In vivo experiments were also performed to demonstrate the function of HNRNPU depletion in cisplatin sensitivity. RESULTS: Significant correlation was found between HNRNPU expression level and sensitivity to cisplatin in bladder cancer cell lines. In the high HNRNPU expressing T24 cancer cells, knockout of HNRNPU inhibited cell proliferation, invasion, and migration. In addition, loss of HNRNPU promoted apoptosis and S-phase arrest in the T24 cells treated with cisplatin. Data from The Cancer Genome Atlas (TCGA) demonstrated that HNRNPU expression was significantly higher in tumor tissues than in normal tissues. High HNRNPU level was negatively correlated with patient survival. Transcriptomic profiling analysis showed that knockout of HNRNPU enhanced cisplatin sensitivity by regulating DNA damage repair genes. Furthermore, it was found that HNRNPU regulates chemosensitivity by affecting the expression of neurofibromin 1 (NF1). CONCLUSIONS: Our study demonstrated that HNRNPU expression is associated with cisplatin sensitivity in bladder urothelial carcinoma cells. Inhibition of HNRNPU could be a potential therapy for cisplatin-resistant bladder cancer.


Assuntos
Antineoplásicos , Carcinoma de Células de Transição , Neoplasias da Bexiga Urinária , Antineoplásicos/farmacologia , Antineoplásicos/uso terapêutico , Apoptose , Carcinoma de Células de Transição/tratamento farmacológico , Linhagem Celular Tumoral , Proliferação de Células , Cisplatino/farmacologia , Cisplatino/uso terapêutico , Resistencia a Medicamentos Antineoplásicos/genética , Ribonucleoproteínas Nucleares Heterogêneas Grupo U , Humanos , Neoplasias da Bexiga Urinária/tratamento farmacológico , Neoplasias da Bexiga Urinária/genética , Neoplasias da Bexiga Urinária/patologia
6.
Sci Rep ; 12(1): 18423, 2022 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-36319719

RESUMO

Testicular germ cell tumor (TGCT) is a rare cancer but the most common tumor among adolescent and young adult males. Patients with advanced TGCT often exhibit a worse prognosis due to the acquisition of therapeutic resistance. Cisplatin-based chemotherapy is a standard treatment for advanced TGCTs initially sensitive to cisplatin, as exemplified by embryonal carcinoma. The acquisition of cisplatin resistance, however, could be a fatal obstacle for TGCT management. To identify cisplatin resistance-related genes, we performed transcriptome analysis for cisplatin-resistant TGCT cells compared to parental cells. In two types of cisplatin-resistant TGCT cell models that we established from patient-derived TGCT cells, and from the NEC8 cell line, we found that mRNA levels of the high-mobility-group nucleosome-binding gene HMGN5 and meiosis-related gene TEX11 were remarkably upregulated compared to those in the corresponding parental cells. We showed that either HMGN5 or TEX11 knockdown substantially reduced the viability of cisplatin-resistant TGCT cells in the presence of cisplatin. Notably, TEX11 silencing in cisplatin-resistant TGCT cells increased the level of cleaved PARP1 protein, and the percentage of double-strand break marker γH2AX-positive cells. We further demonstrated the therapeutic efficiency of TEX11-specific siRNA on in vivo xenograft models derived from cisplatin-resistant patient-derived TGCT cells. Taken together, the present study provides a potential insight into a mechanism of cisplatin resistance via TEX11-dependent pathways that inhibit apoptosis and DNA damage. We expect that our findings can be applied to the improvement of cisplatin-based chemotherapy for TGCT, particularly for TEX11-overexpressing tumor.


Assuntos
Neoplasias Embrionárias de Células Germinativas , Neoplasias Testiculares , Adolescente , Humanos , Masculino , Linhagem Celular Tumoral , Cisplatino/farmacologia , Dano ao DNA , Resistencia a Medicamentos Antineoplásicos , Proteínas HMGN , Neoplasias Testiculares/genética , Testículo/metabolismo , Transativadores/genética
7.
Cell Rep ; 41(6): 111600, 2022 Nov 08.
Artigo em Inglês | MEDLINE | ID: mdl-36351389

RESUMO

Interstrand crosslinks (ICLs) repair by the canonical Fanconi anemia (FA) pathway generates double-strand breaks (DSBs), which are subsequently repaired by the homologous recombination (HR) pathway. Recent studies show that the NEIL3 DNA glycosylase repairs psoralen-ICLs by direct unhooking. However, whether and how NEIL3 regulates MMC and cisplatin-ICL repair remains unclear. Here we show that NEIL3 participates in DSB repair step of ICL repair by promoting HR pathway. Mechanistically, NEIL3 is recruited to the DSB sites through its GRF zinc finger motifs. NEIL3 interacts with the DSB resection machinery, including CtIP, the MRE11-RAD50-NBS1 (MRN) complex, and DNA2, which is mediated by the GRF zinc finger motifs. In addition, NEIL3 is necessary for the chromatin recruitment of the resection machinery, and depletion of NEIL3 decreases end resection and compromises HR. Taken together, our results show that NEIL3 plays an important role in MMC/cisplatin-ICL repair by promoting the HR step in FA/BRCA pathway.


Assuntos
Anemia de Fanconi , Humanos , Anemia de Fanconi/genética , Anemia de Fanconi/metabolismo , Quebras de DNA de Cadeia Dupla , Cisplatino/farmacologia , Reparo do DNA
8.
J Med Chem ; 65(21): 14692-14700, 2022 Nov 10.
Artigo em Inglês | MEDLINE | ID: mdl-36353870

RESUMO

DNA damage repair is considered to be an important mechanism of cisplatin resistance, and the roles of iron homeostasis in action mechanisms of cisplatin have not been studied yet. Herein, a Pt(IV) prodrug (DFX-Pt) integrating cisplatin and the clinical oral iron-chelating agent deferasirox (DFX) is found to be highly active toward cisplatin-insensitive triple-negative breast cancer cells both in vitro and in vivo. RNA-sequencing shows that DFX-Pt can downregulate genes related to the double-strand break (DSB) damage pathway significantly. DFX-Pt can reduce cellular free iron, regulate the expression of the RNA demethylase, and elevate the levels of RNA N6-methyladenosine (m6A), which degrades the DSB-related genes in an m6A-dependent manner. In all, we first reveal the roles of RNA modification in mechanisms of combating DNA damage repair and show that the combination of iron homeostasis intervention may bring new treatment regimens for cisplatin resistance.


Assuntos
Pró-Fármacos , Humanos , Pró-Fármacos/farmacologia , Deferasirox/uso terapêutico , Cisplatino/farmacologia , Metilação , RNA , Quelantes de Ferro/uso terapêutico , Ferro , Dano ao DNA
9.
Molecules ; 27(21)2022 Oct 26.
Artigo em Inglês | MEDLINE | ID: mdl-36364114

RESUMO

The use of cisplatin as a chemotherapeutic drug is impeded by the development of drug resistance. Combination therapies of a chemosensitizer for cisplatin have been studied, but with little success, and the search for an effective combination therapy is continuing. Our earlier reports have shown that Zanthoxylum armatum DC. extract enhances the apoptotic effect of cisplatin in cancer cell lines. In this study, we purified and identified the bioactive phytocompound through bio-assay-guided purification, using column chromatography and HPLC. Chemical characterization using NMR and mass spectrometry revealed the compound as planispine A, with molecular structure C25H30O6 and molecular weight, 426.16 g/mol. Planispine A was found to inhibit cancer cell proliferation in a dose-dependent manner and to sensitize the cancer cells to cisplatin-augmented apoptotic cell death, in a caspase-dependent manner. A combination of planispine A and cisplatin induced S-phase cell cycle arrest, and reduced the expression of survival proteins such as cyclin D1. Interestingly, planispine A inhibits the Fanconi anemia pathway, as shown by reduced FANCD2 foci formation and FANCD2 monoubiquitination, which revealed the molecular mechanism of chemo-sensitization of cancer cells to cisplatin. Evaluation of this combination therapy in cisplatin-resistant tumors may lead to more efficient cisplatin treatment.


Assuntos
Anemia de Fanconi , Neoplasias , Humanos , Cisplatino/farmacologia , Neoplasias/tratamento farmacológico , Neoplasias/metabolismo , Apoptose , Proliferação de Células , Linhagem Celular Tumoral
10.
Molecules ; 27(21)2022 Oct 27.
Artigo em Inglês | MEDLINE | ID: mdl-36364125

RESUMO

This study investigated the therapeutic effect of linagliptin and/or vitamin D3 on testicular steroidogenesis and spermatogenesis in cisplatin-exposed rats including their impact on endoplasmic reticulum (ER) stress and NF-κB/iNOS crosstalk. Cisplatin (7 mg/kg, IP) was injected into adult male albino rats which then were orally treated with drug vehicle, linagliptin (3 mg/kg/day), vitamin D3 (10 µg/kg/day) or both drugs for four weeks. Age-matched rats were used as the control group. Serum samples and testes were collected for further analyses. Cisplatin induced testicular weight loss, deteriorated testicular architecture, loss of germ cells and declined serum and intra-testicular testosterone levels, compared to the control group. There was down-regulation of steroidogenic markers including StAR, CYP11A1, HSD3b and HSD17b in cisplatin-exposed rats, compared with controls. Cisplatin-exposed rats showed up-regulation of ER stress markers in testicular tissue along with increased expression of NF-κB and iNOS in spermatogenic and Leydig cells. These perturbations were almost reversed by vitamin D3 or linagliptin. The combined therapy exerted a more remarkable effect on testicular dysfunction than either monotherapy. These findings suggest a novel therapeutic application for linagliptin combined with vitamin D3 to restore testicular architecture, aberrant steroidogenesis and spermatogenesis after cisplatin exposure. These effects may be attributed to suppression of ER stress and NF-kB/iNOS.


Assuntos
Cisplatino , Testículo , Masculino , Animais , Cisplatino/farmacologia , NF-kappa B/metabolismo , Estresse do Retículo Endoplasmático , Linagliptina , Colecalciferol/farmacologia , Espermatogênese , Estresse Oxidativo
11.
BMC Cancer ; 22(1): 1145, 2022 Nov 07.
Artigo em Inglês | MEDLINE | ID: mdl-36344947

RESUMO

BACKGROUND: Cervical cancer (CC) is a common gynecological malignancy worldwide. Some patients perform serious resistance after chemotherapy, and long-stranded non-coding RNA MEG3 is reported to be involved in the regulation of chemoresistance in many solid tumors. However, its involvement in cervical adenocarcinoma has not been reported. METHODS: Hela cell lines, cisplatin-resistant cell lines (Hela-CR) and nude mice were used in this study. After MEG3 was overexpressed or knocked down in cells by the lentivirus vector, cell growth was detected by the CCK-8 assay, and cell migration was evaluated using Transwell assay. Quantitative real-time polymerase chain reaction (qRT-PCR) was performed to examine the expression of MEG3, miR-21 and PTEN mRNA. Apoptosis was detected by flow cytometry. The targeting relationship between mRNAs was predicted and verified using dual-luciferase reporter gene experiments. Western blot was executed to examine Bax, cleaved-caspase 3, Bcl-2, PTEN and GAPDH expression. Cells were injected into the mice to form xenograft tumors to compare tumorigenesis capacity. RESULTS: We demonstrated that MEG3 was down-regulated in cervical cancer by analyzing the TCGA database. Moreover, knockdown of MEG3 promoted CC cell proliferation, migration and inhibited the apoptosis. These changes of CC cells were more pronounced under cisplatin treatment. Further studies showed that the MEG3/miR-21/PTEN axis affected cisplatin sensitivity in cervical cancer cells, and these results of recue assay were used to confirm this conclusion. CONCLUSIONS: MEG3 performing as ceRNA promotes cisplatin sensitivity in CC cells through the miR-21/PTEN axis.


Assuntos
MicroRNAs , RNA Longo não Codificante , Neoplasias do Colo do Útero , Feminino , Humanos , Camundongos , Animais , RNA Longo não Codificante/genética , RNA Longo não Codificante/metabolismo , Cisplatino/farmacologia , Cisplatino/uso terapêutico , Camundongos Nus , Neoplasias do Colo do Útero/tratamento farmacológico , Neoplasias do Colo do Útero/genética , Células HeLa , MicroRNAs/genética , MicroRNAs/metabolismo , Linhagem Celular Tumoral , Proliferação de Células/genética , RNA Mensageiro , Regulação Neoplásica da Expressão Gênica , PTEN Fosfo-Hidrolase/genética , PTEN Fosfo-Hidrolase/metabolismo
12.
BMC Oral Health ; 22(1): 478, 2022 11 09.
Artigo em Inglês | MEDLINE | ID: mdl-36352396

RESUMO

BACKGROUND: Studies have shown that excessive iron can lead to an increased incidence of cancer. The role of adipocyte enhancer-binding protein 1 (AEBP1) on ferroptosis is unknown. Thus, we explored the effect of AEBP1 silencing in regulation of ferroptosis in cisplatin-resistant oral cancer cells. METHODS: The functions of AEBP1 silencing and sulfasalazine (SSZ) treatment were determined on oral cancer cell lines and tumor xenograft mouse models. Then we evaluated the functions of AEBP1 on cell proliferation, migration, invasion, lipid reactive oxygen species (ROS), labile iron pool (LIP) and free iron, lipid peroxidation, and expression levels of ferroptosis-related genes. RESULTS: AEBP1 was highly expressed in oral cancer cells and tissues. AEBP1 silencing inhibited oral cancer cell proliferation, migration, and invasion after SSZ treatment. SSZ-induced ferroptosis is due to enhanced ROS level, free iron, and lipid peroxidation, which were distinctly increased by AEBP1 silencing. Meanwhile, AEBP1 silencing enhanced the effects of SSZ on levels of LIP and Fe2+, lipid peroxidation, as well as the expression levels of ferroptosis-related genes in the tumor xenograft mouse models. Importantly, AEBP1 silencing suppressed tumor growth in vivo. Furthermore, silencing of AEBP1 might activate the JNK/ P38 /ERK pathway. CONCLUSION: This research suggested that silencing of AEBP1 predisposes cisplatin-resistant oral cancer cells to ferroptosis via the JNK/p38 /ERK pathway.


Assuntos
Ferroptose , Neoplasias Bucais , Humanos , Camundongos , Animais , Cisplatino/farmacologia , Espécies Reativas de Oxigênio/metabolismo , Linhagem Celular Tumoral , Neoplasias Bucais/genética , Sulfassalazina/farmacologia , Ferro/metabolismo , Carboxipeptidases/genética , Carboxipeptidases/metabolismo , Proteínas Repressoras/metabolismo
13.
BMC Urol ; 22(1): 177, 2022 Nov 09.
Artigo em Inglês | MEDLINE | ID: mdl-36352389

RESUMO

BACKGROUND: While gemcitabine/cisplatin (GC) is the gold standard regimen for patients with advanced urothelial carcinoma (aUC), either dose-reduced GC or gemcitabine/carboplatin (GCa) is an alternative option for "cisplatin-unfit" patients. However, few studies have compared outcomes with these commonly used regimens in the real-world setting. METHODS: We retrospectively reviewed patients with aUC who received full-dose GC, dose-reduced GC, or GCa as first-line salvage chemotherapy at two university hospitals between 2016 and 2020. Progression-free survival, cancer-specific survival, and overall survival, as well as best overall response and adverse event profiles, were compared among these three regimens. RESULTS: Of 105 patients, 41, 27, and 37 patients received full-dose GC, dose-reduced GC, and GCa, respectively. Significant differences were noted in the patients' baseline age, primary site, and renal function among the three regimens. Sixty-nine (65.7%) patients died during a median follow-up period of 14 months. There was no significant difference among the three regimens for all survival outcomes and best overall response. However, the complete response rate of dose-reduced GC (2/27, 7.4%) appeared inferior to that of full-dose GC (9/41, 22.0%) or GCa (6/37, 16.2%). Regarding adverse event profiles, no significant difference was observed among the three regimens, except for significantly fewer cases with elevated alanine aminotransferase in the GCa group compared with the other groups. CONCLUSIONS: This study compared the oncological and toxicological outcomes of full-dose GC, dose-reduced GC, and GCa in real-world patients with aUC. Unlike in the clinical trial setting, there were almost no significant differences among the three regimens.


Assuntos
Carcinoma de Células de Transição , Neoplasias da Bexiga Urinária , Humanos , Cisplatino , Carcinoma de Células de Transição/tratamento farmacológico , Carboplatina/efeitos adversos , Estudos Retrospectivos , Neoplasias da Bexiga Urinária/patologia , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico
14.
BMC Oral Health ; 22(1): 473, 2022 11 05.
Artigo em Inglês | MEDLINE | ID: mdl-36335317

RESUMO

BACKGROUND: Oral squamous cell carcinoma (OSCC) is the main type of oral cancer. Disturbing DNA repair is an invaluable way to improve the effectiveness of tumor treatment. Here, we aimed to explore the key enhancer drivers associated with DNA damage repair in OSCC cells. METHODS: Gene Set Enrichment Analysis (GSEA), Gene Set Variation Analysis (GSVA) and Kaplan-Meier analysis were applied to explore the relationship among DNA repair-related genes expression and clinical phenotypes based on The Cancer Genome Atlas (TCGA) database. HOMER software and Integrative Genomics Viewer were applied to identify and visualize enhancers using GSE120634. Toolkit for Cistrome Data Browser was applied to predict transcription factors. Human Protein Atlas Database was used to analyze the protein levels of transcription factors in OSCC and control tissues. Seventy-two OSCC patients were included in this study. qRT-PCR was used to detect transcription factor expression in OSCC and adjacent control tissues collected in this study. qRT-PCR and ChIP-qPCR were used to verify the binding of transcription factors to enhancers, and regulation of target genes transcription. Transcription factor knockdown and control cells were treated with cisplatin. CCK8 was used to detect cell viability and proliferation. Western blotting was implemented to detect the levels of DNA repair-related proteins. Transwell assay was used to detect cell invasion. RESULTS: DNA repair was positively associated with the OSCC metastatic phenotype. Patients in the cluster with high expression of DNA repair-related genes had a worse prognosis and a higher proportion of advanced stage, low-differentiation, alcohol consumption and smoking compared to the cluster with low DNA repair-related gene expression. Seventeen metastasis-specific enhancer-controlled upregulated DNA repair-related genes, with the top two upregulated genes being ADRM1 26 S proteasome ubiquitin receptor (ADRM1) and solute carrier family 12 member 7 (SLC12A7) were screened. High mobility group 20 A (HMG20A) was the key prognostic enhancer driver regulating metastasis-specific DNA repair-related genes, with higher expression in OSCC tissues than normal control tissues, and higher expression in metastatic OSCC tissues than non-metastatic OSCC tissues. HMG20A bound to the metastasis-specific enhancers of ADRM1 and SLC12A7, thereby promoting ADRM1 and SLC12A7 expression. Knockdown of HMG20A enhanced cisplatin sensitivity of cells, and inhibited OSCC cells from repairing DNA damage caused by cisplatin, as well as proliferation and invasion of OSCC cells. CONCLUSION: HMG20A was identified as the key prognostic enhancer driver regulating DNA repair in OSCC cells, providing a new therapeutic target for OSCC.


Assuntos
Carcinoma de Células Escamosas , Neoplasias de Cabeça e Pescoço , Neoplasias Bucais , Humanos , Neoplasias Bucais/patologia , Carcinoma de Células Escamosas/patologia , Cisplatino/farmacologia , Cisplatino/metabolismo , Carcinoma de Células Escamosas de Cabeça e Pescoço/genética , Regulação Neoplásica da Expressão Gênica/genética , Proliferação de Células/genética , Linhagem Celular Tumoral , Prognóstico , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo , Reparo do DNA/genética , Dano ao DNA/genética , Proteínas de Grupo de Alta Mobilidade/genética , Proteínas de Grupo de Alta Mobilidade/metabolismo
15.
Curr Oncol ; 29(11): 7987-7993, 2022 Oct 25.
Artigo em Inglês | MEDLINE | ID: mdl-36354692

RESUMO

Penile squamous cell carcinoma (PSCC) is a rare disease. The treatment options for advanced penile cancer are often limited, and the prognosis remains poor. We reported a 52-year-old male recurrent and metastatic PSCC patient with high PD-L1 expression (90%) and TMB (14.4 muts/Mb). He had undergone penectomy, bilateral inguinal lymph node dissection, and excision of the abdominal wall mass. Despite cisplatin-based concurrent chemoradiotherapy and sequential chemotherapy with docetaxel plus cisplatin then being carried out, the carcinoma still progressed. The patient then obtained progression-free survival with continuous sintilimab, although he experienced the new onset of ICI-induced diabetes after 24 cycles of sintilimab and required sustained insulin treatment. He had negative type 1 diabetes-associated autoantibodies and the susceptible HLA genotype DR3-DQ2 haplotype. This is the first patient with radiation and multichemorefractory PSCC who has obtained the remarkable anti-tumor effect of partial regression exceeding 32 months during continuous sintilimab and anlotinib treatment.


Assuntos
Carcinoma de Células Escamosas , Diabetes Mellitus , Cetoacidose Diabética , Neoplasias Penianas , Masculino , Humanos , Pessoa de Meia-Idade , Neoplasias Penianas/tratamento farmacológico , Neoplasias Penianas/patologia , Cisplatino/uso terapêutico , Anticorpos Monoclonais Humanizados/efeitos adversos , Carcinoma de Células Escamosas/patologia
16.
Small ; 18(46): e2203260, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-36333101

RESUMO

Developing a universal nanoplatform for efficient delivery of various drugs to target sites is urgent for overcoming various biological barriers and realizing combinational cancer treatment. Nanogels, with the advantages of both hydrogels and nanoparticles, may hold potential for addressing the above issue. Here, a dual-responsive nanogel platform (HPC nanogel) is constructed using ß-cyclodextrin-conjugated hyaluronic acid (HA-ßCD), polyethyleneimine (PEI), and cisplatin. HA-ßCD and PEI compose the skeleton of the nanogel, and cisplatin molecules provide the junctions inside the skeleton, thus affording a multiple interactions-based nanogel. Besides, HA endows the nanogel with hyaluronidase (HAase)-responsiveness, and cisplatin guarantees the glutathione (GSH)-responsive ability, which make the nanogel a dual-responsive platform that can degrade and release the loaded drugs when encountering HAase or GSH. Additionally, the HPC nanogel possesses excellent small-molecule drug and protein loading and intracellular delivery capabilities. Especially, for proteins, their intracellular delivery via nanogels is not hindered by serum proteins, and the enzymes delivered into cells still maintain their catalytic activities. Furthermore, the nanogel can codeliver different cargoes to achieve "cocktail" chemotherapeutic efficacy and realize combination cancer therapy. Overall, the HPC nanogel can serve as a multifunctional platform capable of delivering desired drugs to treat cancer or other diseases.


Assuntos
Neoplasias , Platina , Nanogéis , Cisplatino/uso terapêutico , Polietilenoimina , Polietilenoglicóis , Sistemas de Liberação de Medicamentos , Neoplasias/tratamento farmacológico
17.
J Clin Invest ; 132(22)2022 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-36377661

RESUMO

Cisplatin is a potent chemotherapeutic drug that is widely used in the treatment of various solid cancers. However, its clinical effectiveness is strongly limited by frequent severe adverse effects, in particular nephrotoxicity and chemotherapy-induced peripheral neuropathy. Thus, there is an urgent medical need to identify novel strategies that limit cisplatin-induced toxicity. In the present study, we show that the FDA-approved adenosine A2A receptor antagonist istradefylline (KW6002) protected from cisplatin-induced nephrotoxicity and neuropathic pain in mice with or without tumors. Moreover, we also demonstrate that the antitumoral properties of cisplatin were not altered by istradefylline in tumor-bearing mice and could even be potentiated. Altogether, our results support the use of istradefylline as a valuable preventive approach for the clinical management of patients undergoing cisplatin treatment.


Assuntos
Antineoplásicos , Neuralgia , Animais , Camundongos , Cisplatino/efeitos adversos , Purinas/farmacologia , Neuralgia/induzido quimicamente , Receptor A2A de Adenosina , Antineoplásicos/efeitos adversos
18.
Nan Fang Yi Ke Da Xue Xue Bao ; 42(10): 1462-1469, 2022 Oct 20.
Artigo em Chinês | MEDLINE | ID: mdl-36329579

RESUMO

OBJECTIVE: To investigate the role of Numb in regulating mammalian target of rapamycin (mTOR) complex 1 (mTORC1) signaling pathway. METHODS: Male BALB/C mouse models of acute kidney injury (AKI) were subjected to intravenous injections of Numb-siRNA or NC-siRNA with or without intraperitoneal cisplatin injections. After the treatments, the expressions and distribution of Numb and megalin in the renal tissues of the mice were detected with immunohistochemistry, and the renal expressions of Numb, S6, p-S6, S6K1, p-S6K1, 4EBP1 and p-4EBP1 were examined with Western blotting. The proximal renal tubular epithelial cells were isolated from the mice transfected with Numb-siRNA for in vitro culture. In NRK-52E cells, the effects of amino acid stimulation, Numb knockdown, and V1G1 overexpression, alone or in combination, on expressions of Numb, S6 and p-S6 were detected with Western blotting; the expressions of AMPK and p-AMPK were also detected in transfected NRK-52E cells, mouse kidneys and cultured mouse renal tubular epithelial cells. RESULTS: In BALB/C mice, injection of Numb-siRNA caused significant reductions of Numb and p-S6 expressions without affecting megalin expression in the renal proximal tubules (P < 0.05). Cisplatin treatment obviously upregulated p-S6K1 and p-4EBP1 expressions in the kidneys of the mice (P < 0.05), and this effect was significantly inhibited by treatment with Numb-siRNA (P < 0.05). In NRK-52E cells, amino acid stimulation significantly upregulated the expression of p-S6 (P < 0.05), which was strongly suppressed by transfection with Numb-siRNA (P < 0.05). Numb knockdown inhibited AMPK activation in NRK-52E cells, mouse kidneys and primary proximal tubular epithelial cells (P < 0.05). Numb knockdown significantly downregulated V1G1 expression in NRK-52E cells (P < 0.05), and V1G1 overexpression obviously reversed the inhibitory effect of Numb-siRNA on S6 phosphorylation (P < 0.05). CONCLUSION: Numb promotes the activation of mTORC1 signaling in proximal tubular epithelial cells by upregulating V1G1 expression.


Assuntos
Cisplatino , Proteína-2 Relacionada a Receptor de Lipoproteína de Baixa Densidade , Animais , Masculino , Camundongos , Aminoácidos/metabolismo , Aminoácidos/farmacologia , Proteínas Quinases Ativadas por AMP/metabolismo , Cisplatino/farmacologia , Células Epiteliais , Proteína-2 Relacionada a Receptor de Lipoproteína de Baixa Densidade/metabolismo , Mamíferos/metabolismo , Alvo Mecanístico do Complexo 1 de Rapamicina/metabolismo , Proteínas de Membrana/metabolismo , Camundongos Endogâmicos BALB C , Proteínas do Tecido Nervoso/metabolismo , RNA Interferente Pequeno/genética , RNA Interferente Pequeno/metabolismo , Transdução de Sinais , ATPases Vacuolares Próton-Translocadoras/metabolismo
19.
Int J Mol Sci ; 23(21)2022 Oct 24.
Artigo em Inglês | MEDLINE | ID: mdl-36361620

RESUMO

It is well-recognized that cigarette smoking is a primary risk factor in the development of non-small cell lung cancer (NSCLC), known to account for ~80% of all lung cancers with nicotine recognized as the major addictive component. In investigating the effect of nicotine, brain-derived neurotrophic factor (BDNF), and the ß-adrenergic receptor blocker, propranolol, on sensitivity of NSCLC cell lines, A549 and H1299, to cisplatin, we found increased cell viability, and enhanced cisplatin resistance with nicotine and/or BDNF treatment while opposite effects were found upon treatment with propranolol. Cell treatment with epinephrine or nicotine led to EGFR and IGF-1R activation, effects opposite to those found with propranolol. Blocking EGFR and IGF-1R activation increased cell sensitivity to cisplatin in both cell lines. PI3K and AKT activities were upregulated by nicotine or BDNF and downregulated by cell treatment with inhibitors against EGFR and IGF-1R and by propranolol. Apoptosis and cell sensitivity to cisplatin increased upon co-treatment of cells with cisplatin and inhibitors against PI3K or AKT. Our findings shed light on an interplay between nicotine, BDNF, and ß-Adrenergic receptor signaling in regulating survival of lung cancer cells and chemoresistance which can likely expand therapeutic opportunities that target this regulatory network in the future.


Assuntos
Carcinoma Pulmonar de Células não Pequenas , Neoplasias Pulmonares , Humanos , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/metabolismo , Carcinoma Pulmonar de Células não Pequenas/metabolismo , Cisplatino/farmacologia , Cisplatino/uso terapêutico , Nicotina/farmacologia , Fator Neurotrófico Derivado do Encéfalo/farmacologia , Proteínas Proto-Oncogênicas c-akt/metabolismo , Receptores ErbB/metabolismo , Propranolol/farmacologia , Propranolol/uso terapêutico , Antagonistas Adrenérgicos/farmacologia , Resistencia a Medicamentos Antineoplásicos , Fosfatidilinositol 3-Quinases/metabolismo , Receptores Adrenérgicos beta , Linhagem Celular Tumoral
20.
Int J Mol Sci ; 23(21)2022 Oct 25.
Artigo em Inglês | MEDLINE | ID: mdl-36361682

RESUMO

Ovarian cancer is one of the most dangerous gynecologic cancers worldwide, showing a high fatality rate and recurrence due to diagnosis at an advanced stage of the disease and the occurrence of chemoresistance, which weakens the therapeutic effects of the chemotherapeutic treatments. In fact, although paclitaxel and platinum-based drugs (carboplatin or cisplatin) are widely used alone or in combination to treat ovarian cancer, the occurrence of chemoresistance significantly reduces the effects of these drugs. Metformin is a hypoglycemic agent that is commonly used for the treatment of type 2 diabetes mellitus and non-alcoholic fatty liver disease. However, this drug also shows anti-tumor activity, reducing cancer risk and chemoresistance. This review analyzes the current literature regarding the role of metformin in ovarian cancer and investigates what is currently known about its effects in reducing paclitaxel and platinum resistance to restore sensitivity to these drugs.


Assuntos
Antineoplásicos , Diabetes Mellitus Tipo 2 , Metformina , Neoplasias Ovarianas , Feminino , Humanos , Paclitaxel/farmacologia , Paclitaxel/uso terapêutico , Metformina/farmacologia , Metformina/uso terapêutico , Diabetes Mellitus Tipo 2/tratamento farmacológico , Neoplasias Ovarianas/tratamento farmacológico , Neoplasias Ovarianas/patologia , Antineoplásicos/farmacologia , Carcinoma Epitelial do Ovário/tratamento farmacológico , Carboplatina/farmacologia , Carboplatina/uso terapêutico , Cisplatino/farmacologia , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...