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1.
Cell Signal ; 119: 111181, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38643946

RESUMO

Prohibitin (PHB) is a pleiotropic molecule with a variety of known functions and subcellular locations. PHB's function in breast cancer is poorly understood. Herein, we report that PHB is expressed in cancer types of diverse origin including breast cancer. The cancer patients with changes in PHB were reported to have significantly reduced 'overall survival' in comparison to the cases without alterations in PHB. The expression of PHB was increased by H2O2 and also by Moringin (MG), which is an isothiocyanate derived from the seeds of Moringa oleifera. MG interacted with PHB, DRP1, and SLP2 and inhibited the growth of MCF-7 and MDAMB-231 cells. The isothiocyanate triggered apoptosis in breast cancer cells as revealed by AO/PI assay, phosphatidylserine externalization, cell cycle analysis and DAPI staining. MG induced proapoptotic proteins expression such as cytochrome c, p53, and cleaved caspase-7. Further, cell survival proteins such as survivin, Bcl-2, and Bcl-xL were suppressed. A depolarization of membrane potential suggested that the apoptosis was triggered through mitochondria. The isothiocyanate suppressed the cancer cell migration and interacted with NF-κB subunits. MG suppressed p65 nuclear translocation induced by TNF-α. The reactive oxygen species generation was also induced by the isothiocyanate in breast cancer cells. MG also modulated the expression of lncRNAs. Collectively, the functions of PHB in breast cancer growth is evident from this study. The activities of MG against breast cancer might result from its ability to modulate multiple cancer-related targets.


Assuntos
Apoptose , Neoplasias da Mama , Isotiocianatos , Proibitinas , Transdução de Sinais , Humanos , Isotiocianatos/farmacologia , Neoplasias da Mama/metabolismo , Neoplasias da Mama/patologia , Neoplasias da Mama/tratamento farmacológico , Feminino , Apoptose/efeitos dos fármacos , Transdução de Sinais/efeitos dos fármacos , Proteínas Repressoras/metabolismo , Linhagem Celular Tumoral , Células MCF-7 , Movimento Celular/efeitos dos fármacos , Peróxido de Hidrogênio/farmacologia , Peróxido de Hidrogênio/metabolismo , NF-kappa B/metabolismo , Proliferação de Células/efeitos dos fármacos
2.
Curr Med Chem ; 2024 Mar 21.
Artigo em Inglês | MEDLINE | ID: mdl-38523543

RESUMO

ims: The aim of this study was to evaluate the combined and comparative efficacy of Caffeic acid phenethyl ester (CAPE) and curcumin in breast cancer. BACKGROUND: CAPE and curcumin are a class of phenolics. While curcumin is obtained from turmeric, CAPE is found in Baccharis sarothroides and Populus deltoides. Both agents are reported to produce activities in some cancer types. The combined and comparative effects of the two agents in breast cancer have not yet reported. OBJECTIVE: We evaluated the potential of CAPE and curcumin in both in vitro and in vivo breast cancer models. METHODS: Human breast cancer cell lines, MDA-MB-231 and MCF-7, were exposed to CAPE and curcumin, followed by functional assays such as cell cytotoxicity, cell proliferation and colony formation, cell cycle, mitochondrial membrane potential, apoptosis, and monodansylcadaverine (MDC) staining for autophagy. Computational analyses and mouse models were also used. RESULTS: Employing computational analyses, both agents were found to exhibit drug-like properties. Both molecules interacted with the key molecules of the NF-κB pathway. CAPE and curcumin inhibited cell proliferation, colony formation, and invasion, triggering apoptosis in breast cancer cells. CAPE was found to be more effective than curcumin. Two agents working together were more effective than each agent working alone. Both agents suppressed the expression of survivin, Bcl-xL and GLUT-1. The level of cleaved PARP was increased by both agents. Both phenolics observed an induction in ROS generation. Further, both molecules triggered a dissipation in mitochondrial membrane potential. In mice models implanted with Ehrlich-Lettre ascites carcinoma (EAC) cells, both drugs inhibited the growth of the tumour. The phenolics also modulated the metabolic parameters in tumour-bearing mice. CONCLUSION: The observations suggest that the combination of curcumin plus CAPE may be better in comparison to individual molecules. Other: The study opens a window for analysing the efficacy of the combination of CAPE and curcumin in animal studies. This will provide a basis for examining the combined efficacy of two agents in a clinical trial.

3.
Nat Prod Res ; 38(6): 1080-1084, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-37157823

RESUMO

Semecarpus anacardium L.f. has been commonly used in various traditional medicines from ancient times. The nuts have been described in Ayurveda medication systems to treat numerous clinical ailments. However, isolating phytochemical constituents from nuts remain challenging and exhibits cytotoxic effects on other cells. In this study, we have standardized procedures for isolating phytochemicals from the leaf extract. The ethyl acetate leaf extract selectively affects cancer cells in a dose-dependent manner (IC50: 0.57 µg/ml in MCF-7 cells) in various cancer cell lines and induces apoptosis in cancer cells. However, the non-malignant cells were relatively insensitive to the extract. Next, the incubation of the leaf extract induces cell cycle arrest and suppresses cancer cell migration in the cell culture model. Moreover, oral administration of extract significantly restored tumor growth in mice. Together, these observations suggest the anti-cancer activities of S. anacardium L.f. leaf potential for both in vitro and in vivo models.


Assuntos
Antineoplásicos , Neoplasias , Semecarpus , Camundongos , Animais , Extratos Vegetais/farmacologia , Extratos Vegetais/uso terapêutico , Neoplasias/tratamento farmacológico , Nozes
6.
J Clin Exp Hepatol ; 14(1): 101269, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38107186

RESUMO

Hepatocellular carcinoma (HCC) presents significant treatment challenges despite considerable advancements in its management. The Indian National Association for the Study of the Liver (INASL) first published its guidelines to aid healthcare professionals in the diagnosis and treatment of HCC in 2014. These guidelines were subsequently updated in 2019. However, INASL has recognized the need to revise its guidelines in 2023 due to recent rapid advancements in the diagnosis and management of HCC, particularly for intermediate and advanced stages. The aim is to provide healthcare professionals with evidence-based recommendations tailored to the Indian context. To accomplish this, a task force was formed, and a two-day round table discussion was held in Puri, Odisha. During this event, experts in their respective fields deliberated and finalized consensus statements to develop these updated guidelines. The 2023 INASL guidelines offer a comprehensive framework for the diagnosis, staging, and management of intermediate and advanced HCC in India. They represent a significant step forward in standardizing clinical practices nationwide, with the primary objective of ensuring that patients with HCC receive the best possible care based on the latest evidence. The guidelines cover various topics related to intermediate and advanced HCC, including biomarkers of aggressive behavior, staging, treatment options, and follow-up care.

7.
Sci Rep ; 13(1): 19101, 2023 11 04.
Artigo em Inglês | MEDLINE | ID: mdl-37925508

RESUMO

Gallbladder cancer (GBC) is a lethal disease with surgical resection as the only curative treatment. However, many patients are ineligible for surgery, and current adjuvant treatments exhibit limited effectiveness. Next-generation sequencing has improved our understanding of molecular pathways in cancer, sparking interest in microRNA-based gene regulation. The aim of the study is to identify dysregulated miRNAs in GBC and investigate their potential as therapeutic tools for effective and targeted treatment strategies. GBC and control tissue samples were sequenced for miRNA expression using the Illumina HiSeq platform. Biological processes and related pathways were determined using the Panther and Gene Ontology databases. 439 significantly differentially expressed miRNAs were identified; 19 of them were upregulated and 29 were downregulated. Key enriched biological processes included immune cell apoptosis, endoplasmic reticulum (ER) overload response, and negative regulation of the androgen receptor (AR) signaling pathway. Panther analysis revealed the insulin-like growth factor (IGF)-mitogen activated protein kinases (MAPK) cascade, p38 MAPK pathway, p53 pathway, and FAS (a subgroup of the tumor necrosis factor receptor) signaling pathway as highly enriched among dysregulated miRNAs. Kirsten rat sarcoma virus (KRAS), AR, and interferon gamma (IFN-γ) pathways were identified among the key pathways potentially amenable to targeted therapy. We concluded that a combination approach involving miRNA-based interventions could enhance therapeutic outcomes. Our research emphasizes the importance of precision medicine, targeting pathways using sense and anti-sense miRNAs as potential therapies in GBC.


Assuntos
Carcinoma in Situ , Neoplasias da Vesícula Biliar , MicroRNAs , Humanos , MicroRNAs/metabolismo , Neoplasias da Vesícula Biliar/patologia , Sequenciamento de Nucleotídeos em Larga Escala , Transdução de Sinais/genética , Proteínas Quinases Ativadas por Mitógeno/metabolismo
8.
Transplantation ; 107(10): 2238-2246, 2023 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-37749813

RESUMO

Small-for-size syndrome (SFSS) following living donor liver transplantation is a complication that can lead to devastating outcomes such as prolonged poor graft function and possibly graft loss. Because of the concern about the syndrome, some transplants of mismatched grafts may not be performed. Portal hyperperfusion of a small graft and hyperdynamic splanchnic circulation are recognized as main pathogenic factors for the syndrome. Management of established SFSS is guided by the severity of the presentation with the initial focus on pharmacological therapy to modulate portal flow and provide supportive care to the patient with the goal of facilitating graft regeneration and recovery. When medical management fails or condition progresses with impending dysfunction or even liver failure, interventional radiology (IR) and/or surgical interventions to reduce portal overperfusion should be considered. Although most patients have good outcomes with medical, IR, and/or surgical management that allow graft regeneration, the risk of graft loss increases dramatically in the setting of bilirubin >10 mg/dL and INR>1.6 on postoperative day 7 or isolated bilirubin >20 mg/dL on postoperative day 14. Retransplantation should be considered based on the overall clinical situation and the above postoperative laboratory parameters. The following recommendations focus on medical and IR/surgical management of SFSS as well as considerations and timing of retransplantation when other therapies fail.


Assuntos
Transplante de Fígado , Humanos , Transplante de Fígado/efeitos adversos , Doadores Vivos , Bilirrubina , Consenso , Laboratórios , Síndrome
9.
Org Biomol Chem ; 21(21): 4482-4490, 2023 05 31.
Artigo em Inglês | MEDLINE | ID: mdl-37194630

RESUMO

The colorimetric and fluorescence responses of a new rhodamine-functionalized probe (E)-2-(((5-chloro-3-methyl-1-phenyl-1H-pyrazol-4-yl)methylene)amino)-3',6'-bis(diethylamino)spiro[isoindoline-1,9'-xanthen]-3-one (RMP) are investigated. RMP has been thoroughly characterized using various spectroscopic tools and single crystal X-ray diffraction. Among different competing cations, it shows highly sensitive colorimetric and "OFF-ON" fluorescence responses towards Al3+, Fe3+and Cr3+metal ions. The spectral shifts are clearly noticeable in the visible region of the absorption spectrum and can be observed with the naked eye. Fluorescence quantum yield, stoichiometric ratio, binding constant and detection limit of RMP towards Al3+, Fe3+and Cr3+metal ions have been calculated. Furthermore, RMP-M3+ complexes are reversible and sensitive to EDTA, which effectively mimics a molecular logic gate. Al3+, Fe3+and Cr3+metal ions have been further applied in intracellular application in model human cells.


Assuntos
Colorimetria , Corantes Fluorescentes , Humanos , Rodaminas/química , Corantes Fluorescentes/química , Espectrometria de Fluorescência/métodos , Metais , Cátions , Pirazóis
11.
J Control Release ; 357: 444-459, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-37023798

RESUMO

Neuroblastoma (NB) accounts for about 13% of all pediatric cancer mortality and is the leading cause of pediatric cancer death for children aged 1 to 5 years. NB, a developmental malignancy of neural ganglia, originates from neural crest-derived cells, which undergo a defective sympathetic neuronal differentiation due to genomic and epigenetic aberrations. NB is a complex disease with remarkable biological and genetic variation and clinical heterogeneity, such as spontaneous regression, treatment resistance, and poor survival rates. Depending on its severity, NB is categorized as high-risk, intermediate-risk, and low-risk., whereas high-risk NB accounts for a high infant mortality rate. Several studies revealed that NB cells suppress immune cell activity through diverse signaling pathways, including exosome-based signaling pathways. Exosome signaling has been shown to modulate gene expression in the target immune cells and attenuate the signaling events through non-coding RNAs. Since high-risk NB is characterized by a low survival rate and high clinical heterogeneity with current intensive therapies, it is crucial to unravel the molecular events of pathogenesis and develop novel therapeutic targets in high-risk, relapsed, or recurrent tumors in NB to improve patient survival. This article discusses etiology, pathophysiology, risk assessment, molecular cytogenetics, and the contribution of extracellular vesicles, non-coding RNAs, and cancer stem cells in the tumorigenesis of NB. We also detail the latest developments in NB immunotherapy and nanoparticle-mediated drug delivery treatment options.


Assuntos
Neuroblastoma , Humanos , Criança , Neuroblastoma/diagnóstico , Neuroblastoma/tratamento farmacológico , Neuroblastoma/genética , Transdução de Sinais , Imunoterapia
12.
Mol Biol Rep ; 50(3): 2823-2834, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36595119

RESUMO

The growing use of ionizing radiation (IR)-based diagnostic and treatment methods has been linked to increasing chronic diseases among patients and healthcare professionals. However, multiple factors such as IR dose, dose-rate, and duration of exposure influence the IR-induced chronic effects. The predicted links between low-dose ionizing radiation (LDIR) and health risks are controversial due to the non-availability of direct human studies. The studies pertaining to LDIR effects have importance in public health as exposure to background LDIR is routine. It has been anticipated that data from epidemiological and clinical reports and results of preclinical studies can resolve this controversy and help to clarify the notion of LDIR-associated health risks. Accumulating scientific literature shows reduced cancer risk, cancer-related deaths, curtailed neuro-impairments, improved neural functions, and reduced diabetes-related complications after LDIR exposure. In addition, it was found to alter evolutionarily conserved stress response pathways. However, the picture of molecular signaling pathways in LDIR responses is unclear. Besides, there is limited/no information on biomarkers of epidemiological LDIR exposure. Therefore, the present review discusses epidemiological, clinical, and preclinical studies on LDIR-induced positive effects in three chronic diseases (cancer, dementia, and diabetes) and their associated molecular mechanisms. The knowledge of LDIR response mechanisms may help to devise LDIR-based therapeutic modalities to stop disease progression. Modulation of these pathways may be helpful in developing radiation resistance among humans. However, more clinical evidence with additional biochemical, cellular, and molecular data and exploring the side effects of LDIR are the major areas of future research.


Assuntos
Demência , Diabetes Mellitus , Neoplasias , Humanos , Relação Dose-Resposta à Radiação , Radiação Ionizante , Neoplasias/epidemiologia , Neoplasias/radioterapia , Demência/epidemiologia
13.
Metabolomics ; 19(2): 8, 2023 01 30.
Artigo em Inglês | MEDLINE | ID: mdl-36710275

RESUMO

INTRODUCTION: Globally, one of the major causes of cancer related deaths in women is breast cancer. Although metabolic pattern is altered in cancer patients, robust metabolic biomarkers with a potential to improve the screening and disease monitoring are lacking. A complete metabolome profiling of breast cancer patients may lead to the identification of diagnostic/prognostic markers and potential targets. OBJECTIVES: The aim of this study was to analyze the metabolic profile in the serum from 43 breast cancer patients and 13 healthy individuals. MATERIALS & METHODS: We used 1H NMR spectroscopy for the identification and quantification of metabolites. q-RT-PCR was used to examine the relative expression of lncRNAs. RESULTS: Metabolites such as amino acids, lipids, membrane metabolites, lipoproteins, and energy metabolites were observed in the serum from both patients and healthy individuals. Using unsupervised PCA, supervised PLS-DA, supervised OPLS-DA, and random forest classification, we observed that more than 25 metabolites were altered in the breast cancer patients. Metabolites with AUC value > 0.9 were selected for further analysis that revealed significant elevation of lactate, LPR and glycerol, while the level of glucose, succinate, and isobutyrate was reduced in breast cancer patients in comparison to healthy control. The level of these metabolites (except LPR) was altered in advanced-stage breast cancer patients in comparison to early-stage breast cancer patients. The altered metabolites were also associated with over 25 signaling pathways related to metabolism. Further, lncRNAs such as H19, MEG3 and GAS5 were dysregulated in the breast tumor tissue in comparison to normal adjacent tissue. CONCLUSION: The study provides insights into metabolic alteration in breast cancer patients. It also provides an avenue to examine the association of lncRNAs with metabolic patterns in patients.


Assuntos
Neoplasias da Mama , RNA Longo não Codificante , Humanos , Feminino , RNA Longo não Codificante/genética , RNA Longo não Codificante/metabolismo , Metabolômica/métodos , Neoplasias da Mama/genética , Neoplasias da Mama/metabolismo , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Metaboloma , Espectroscopia de Ressonância Magnética/métodos , Gravidade do Paciente
14.
Antioxid Redox Signal ; 38(10-12): 853-876, 2023 04.
Artigo em Inglês | MEDLINE | ID: mdl-36242099

RESUMO

Significance: Targeted cancer therapy with minimal off-target consequences has shown promise for some cancer types. Although cytochrome P450 (CYP) consists of 18 families, CYP1-4 families play key role in metabolizing xenobiotics and cancer drugs. This eventually affects the process of carcinogenesis, treatment outcomes, and cancer drug resistance. Differential overexpression of CYPs in transformed cells, together with phenotypic alterations in tumors, presents a potential for therapeutic intervention. Recent Advances: Recent advances in molecular tools and information technology have helped utilize CYPs as cancer targets. The precise expression in various tumors, X-ray crystal structures, improved understanding of the structure-activity relationship, and new approaches in the development of prodrugs have supported the ongoing efforts to develop CYP-based drugs with a better therapeutic index. Critical Issues: Narrow therapeutic index, off-target effects, drug resistance, and tumor heterogeneity limit the benefits of CYP-based conventional cancer therapies. In this review, we address the CYP1-4 families as druggable targets in cancer. An emphasis is given to the CYP expression, function, and the possible mechanisms that drive expression and activity in normal and transformed tissues. The strategies that inhibit or activate CYPs for therapeutic benefits are also discussed. Future Directions: Efforts are needed to develop more selective tools that will help comprehend molecular and metabolic alterations in tumor tissues with biological end-points in relation to CYPs. This will eventually translate to developing more specific CYP inhibitors/inducers. Antioxid. Redox Signal. 38, 853-876.


Assuntos
Neoplasias , Pró-Fármacos , Xenobióticos/metabolismo , Sistema Enzimático do Citocromo P-450/química , Sistema Enzimático do Citocromo P-450/metabolismo , Comunicação Celular , Oxirredução
15.
Curr Med Chem ; 30(2): 178-202, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-35619266

RESUMO

There is a long history of informal use of Cannabis sativa (commonly called cannabis) for many purposes, including treating various ailments worldwide. However, the legalization of cannabis in multiple countries, specifically for medical purposes, has grabbed the researchers' attention to discover the scientific evidence regarding cannabis's beneficial effects. Among over 500 identified compounds (cannabinoids), Δ9-Tetrahydrocannabinol (THC) and cannabidiol (CBD) are two major active cannabinoids derived from cannabis. Cannabinoids exert their effects through cannabinoid receptors (CB1R and CB2R). In the recent past, clinical trials have shown the efficacy of cannabis and cannabinoids for various human ailments, such as cancer, neurological disorders, inflammatory bowel disease, chronic pain, and metabolic disorders. The commonly used constituents and derivatives of cannabis include CBD, THC, THCV, dronabinol, nabilone, and nabiximol. The cannabis constituents have also been used in combination with other agents, such as megestrol acetate, in some clinical trials. The common routes for the administration of cannabis are oral, sublingual, or topical. Cannabis has also been consumed through smoking, inhalation, or with food and tea. A maximum of 572 patients and a minimum of nine patients have participated in a single clinical trial. Cannabis is legalized in some countries with restrictions, such as Belize, Canada, Colombia, Costa Rica, The Czech Republic, Jamaica, Netherlands, South Africa, Spain, and Uruguay. This article provides a compilation of published studies focusing on clinal trials on the therapeutic effects of cannabis. The adverse effects of cannabis and its constituents are also discussed.


Assuntos
Canabidiol , Canabinoides , Cannabis , Humanos , Dronabinol/farmacologia , Canabinoides/uso terapêutico , Canabinoides/farmacologia , Canabidiol/uso terapêutico , Agonistas de Receptores de Canabinoides
16.
Indian J Dent Res ; 34(4): 375-380, 2023 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-38739815

RESUMO

INTRODUCTION: Exogenous application of direct current (DC) on piezoelectric biopolymers results in biochemical modifications in the intracellular/extracellular regions which profoundly affects the pace of bone turnover. A qualitative examination of DC (waveform and frequency) provides ideal qualities of current. MATERIAL AND METHOD: 20 female Wistar rats (Rattus norvegicus) were randomly selected and divided into control (group 1-4 rats) with orthodontic appliance (OA) and experimental groups (OA + Micro-current (MC). Experimental groups were subdivided into four groups (group 2-20 µA/5 sec, 3-20 µA/10 sec, 4-15 µA/5 sec, 5-15 µA/10 sec with four rats in each). The tooth movement was recorded every 24th hours for 7 days. Gingival crevicular fluid (GCF) was collected 6 hr, 12 hr, 24 hr, 3rd day and 168 hrs with the absorbent paper points at specific location around the tooth in control and experiment groups. Histopathological analysis was done on 168 hrs to assess the osteoclastic activity around the root. Interleukin-6 (IL-6) concentration was accessed using enzyme-linked immunosorbent assay (ELISA). The data were subjected to one-way ANOVA and Tukey's posthoc test. RESULTS: There was a statistically significant difference in tooth movement, group 3 (20 µA/10 sec) showed an increased rate of tooth movement on the 168 hrs. The level of IL-6 was maximum on 72 hrs in experimental group 3. CONCLUSION: The study showed time interval/frequency, the waveform, and the amount of current play a significant role in determining bone turnover and rate of tooth movement.


Assuntos
Biomarcadores , Líquido do Sulco Gengival , Interleucina-6 , Ratos Wistar , Técnicas de Movimentação Dentária , Animais , Técnicas de Movimentação Dentária/métodos , Feminino , Ratos , Interleucina-6/análise , Líquido do Sulco Gengival/química , Fatores de Tempo , Biomarcadores/análise
17.
Transplant Direct ; 8(11): e1396, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-36246001

RESUMO

Preservation solutions are required for organ viability in deceased donor liver transplantation (LT). However, their role in live donor LT (LDLT) has not been standardized. Methods: Eighty adult recipients who underwent right lobe LDLT at the Department of Liver Transplantation Surgery, Gambat, Pakistan, were studied. Based on shorter cold ischemia time and no back table reconstruction work, recipients were assigned to receive "no preservation solution" (cases/non-histidine-tryptophan-ketoglutarate group; n = 40) or "HTK group" (controls; n = 40). Early allograft dysfunction (bilirubin, transaminases, and international normalized ratio), postoperative complications (biliary and vascular), hospital stay, and 1-y survival were reported. The direct cost was also reported. Results: Demographics and clinical characteristics were comparable in the 2 groups. Comparing cases versus controls, mean bilirubin, alanine aminotransferase, aspartate aminotransferase, and international normalized ratio on postoperative day 7 were similar in the 2 groups. Five (12.5%) cases and 4 (10%) controls developed early allograft dysfunction (P = 0.72). Post-LT complications (biliary leak 2.5% in cases versus 0 in control), strictures (15% in cases versus 17.5% in controls), hepatic artery thrombosis (2.5% versus 00%)' and portal vein thrombosis (0 versus 2.5%) were comparable. Mean hospital stay (10.80 + 2.36 and 11.78 + 2.91 d) and 30 d mortality (2.5% versus 5%) were also comparable. Finally, 1-y survival based on Kaplan-Meier analysis was comparable in both groups (ie, 92.5%; non-HTK group versus 90%; HTK group) (P = 0.71). The direct cost of using a non-HTK-based approach was less than the HTK solution. Conclusion: In a selected cohort of right lobe LDLT recipients, preservation solutions can be avoided safely with comparable outcomes.

18.
Semin Cancer Biol ; 87: 127-136, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36265806

RESUMO

Indiscriminate usage and mismanagement of chemicals in the agricultural and industrial sectors have contaminated different environmental compartments. Exposure to these persistent and hazardous pollutants like heavy metals, endocrine disruptors, aromatic hydrocarbons, and pesticides can result in various health adversities, including cancer. Chemical carcinogens follow a similar pattern of carcinogenesis, like oxidative stress, chromosomal aberration, DNA double-strand break, mismatch repair, and misregulation of oncogenic and/or tumor suppressors. Out of several cancer-associated endpoints, cellular metabolic homeostasis is the commonest to be deregulated upon chemical exposure. Chemical carcinogens hamper glycolytic reprogramming to fuel the malignant transformation of the cells and/or promote cancer progression. Several regulators like Akt, ERK, Ras, c-Myc, HIF-1α, and p53 regulate glycolysis in chemical-induced carcinogenesis. However, the deregulation of the anabolic biochemistry of glucose during chemical-induced carcinogenesis remains to be uncovered. This review comprehensively covers the environmental chemical-induced glycolytic shift during carcinogenesis and its mechanism. The focus is also to fill the major gaps associated with understanding the fairy tale between environmental carcinogens and metabolic reprogramming. Although evidence from studies regarding glycolytic reprogramming in chemical carcinogenesis provides valuable insights into cancer therapy, exposure to a mixture of toxicants and their mechanism of inducing carcinogenesis still needs to be studied.


Assuntos
Glicólise , Neoplasias , Humanos , Neoplasias/induzido quimicamente , Carcinogênese , Transformação Celular Neoplásica , Carcinógenos/toxicidade
19.
Life (Basel) ; 12(8)2022 Jul 28.
Artigo em Inglês | MEDLINE | ID: mdl-36013322

RESUMO

Paclitaxel (PAC) has been approved by FDA for clinical use (Taxol®), yet dose-dependent severe toxicity due to the adjuvant Cremophor EL® in combination with ethanol is a major drawback. The drawbacks of the current therapy can be overcome by (i) finding a suitable vehicle that cannot only bypass the above adjuvant but also be used to deliver drugs orally and (ii) combining the PAC with some other chemotherapeutics to have the enhanced therapeutic efficacy. In the current work, we have used folic acid (FA) functionalized bovine milk-derived exosomes for oral delivery of PAC in combination with 5-fluorouracil (5-FU). Exosomes before and after the drug loading were found to have a particle size in the range of 80-100 nm, polydispersity index (PDI ~0.20), zeta potential (~-25 mV), entrapment efficiency (~82%), practical drug loading (~28%) and sustained drug release for 48 h. Significant decreases in IC50 were observed in the case of exosomes loaded drugs which further improved following the FA functionalization. FA functionalized coumarin-6-loaded exosomes showed remarkably higher cellular uptake in comparison with free coumarin-6. Moreover, FA-functionalized drug-loaded exosomes showed a higher apoptotic index with better control over cell migration. Collectively, data suggested the enhanced efficacy of the combination following its loading to the folic acid functionalized exosomes against breast cancer.

20.
J Cancer Res Ther ; 18(3): 668-676, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35900539

RESUMO

Background: Dysregulation in Wnt/ß-catenin signaling has been associated with the initiation and metastasis of cancer cells. Transcription factor 4 (TCF4) (also named as transcription factor 7-like 2) is a key transcriptional factor of the Wnt signaling pathway, which, when interact with ß-catenin activates Wnt genes which plays an essential role in tumor development. The expression pattern and clinical significance of TCF4 in gallbladder cancer (GBC) are not yet established. Aims: This study was performed to assess the expression pattern of TCF4 in GBC tissue and attempted to correlate its expression with different clinicopathological parameters. Materials and Methods: The study was conducted on 33 surgically resected specimens of gallbladder carcinoma (GBC) and 12 cases of chronic cholecystitis (CC) as control, which had been confirmed from histology. The expression of TCF4 was performed by the reverse transcription polymerase chain reaction and immunohistochemistry. Results: Relative mRNA expression levels of ß-catenin and TCF4 in GBC tissues were significantly (P < 0.05) higher than in CC samples. TCF4 protein expression was observed in 81.82% (27/33) GBC cases. Specifically, among GBC samples, 21.21% (7/33) was graded as strongly positive, 60.61% (20/33) graded as moderately positive, whereas 18.18% (6/33) graded as negative. All 12 CC samples graded as negative. Overall, TCF4 expression in GBC tissues was statistically significant over CC samples (P < 0.05). Moreover, we observed that TCF4 expression was significantly higher (P < 0.05) in high tumor grades than low grade, higher (P < 0.05) in Stage 2 and Stage 3 than Stage 1. Conclusion: The present study suggests that TCF4 may exert an oncogenic role in the progression of GBC and may serve as a new potential candidate biomarker for tumor progression, and it might be a potential therapeutic target against GBC.


Assuntos
Colecistite , Neoplasias da Vesícula Biliar , Fator de Transcrição 4/metabolismo , Linhagem Celular Tumoral , Colecistite/patologia , Neoplasias da Vesícula Biliar/patologia , Humanos , Fator de Transcrição 4/genética , Fatores de Transcrição/genética , Via de Sinalização Wnt/genética , beta Catenina/genética , beta Catenina/metabolismo
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