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1.
Ultrason Sonochem ; 108: 106966, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38924854

RESUMO

In recent years, researchers have increasingly focused on the development of multiphase trimetallic nanocomposites (TMNC) incorporating ternary metals or metal oxides, which hold significant potential as alternatives for combatting biofilms and bacterial infections. Enhanced oral health is ensured by the innovative techniques used to effectively prevent bacterial adherence and formation of biofilm on dental sutures. In this investigation, TMNC, which consists of Pb, Ag, and Cu, was synthesized using an autoclave-assisted sonochemical technique. Following synthesis, TMNC were characterized using FTIR, XRD, BET, XPS, TGA, and Raman spectroscopy to analyze their shape and microstructure. Subsequent evaluations, including MTT assay, antibacterial activity testing, and biofilm formation analysis, were conducted to assess the efficiency of the synthesized TMNC. Cytotoxicity and anti-human oral squamous cell carcinoma activities of TMNC were evaluated using the Human Oral Cancer cell line (KB) cell line through MTT assay, demonstrating a dose-dependent increase in anti-human oral squamous cell carcinoma activity against the KB cell line compared to the normal cell line, resulting in notably high cell viability. Furthermore, an ultrasonic probe was employed to incorporate TMNC onto dental suturing threads, with different concentrations of TMNC, ultrasonic power levels, and durations considered to determine optimal embedding conditions that result in the highest antibacterial activity. The inhibitory effects of TMNC, both in well diffusion assays and when incorporated into dental suturing threads, against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria on Mueller-Hinton agar (MHA) were assessed using various concentrations of TMNC. The results of the study indicated that the efficacy of TMNC in inhibiting bacterial growth on dental suturing threads remained impressive, even at low concentrations. Moreover, an evaluation of their potential to destabilize biofilms formed by S. aureus and E. coli, the two pathogens in humans, indicated that TMNC would be a promising anti-biofilm agent.


Assuntos
Antibacterianos , Biofilmes , Cobre , Chumbo , Nanocompostos , Prata , Humanos , Antibacterianos/farmacologia , Antibacterianos/química , Antibacterianos/síntese química , Nanocompostos/química , Cobre/química , Cobre/farmacologia , Prata/química , Prata/farmacologia , Biofilmes/efeitos dos fármacos , Linhagem Celular Tumoral , Chumbo/química , Ondas Ultrassônicas , Odontologia , Sobrevivência Celular/efeitos dos fármacos , Técnicas de Química Sintética , Staphylococcus aureus/efeitos dos fármacos , Testes de Sensibilidade Microbiana , Escherichia coli/efeitos dos fármacos
2.
Biomed Res Int ; 2022: 3234484, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35898683

RESUMO

People with hematologic malignancies (HM) frequently postulate intensive care unit (ICU) hospitalization due to organ damage caused by the disease process or treatment-related consequences. This study is aimed at looking at mortality and sign factors in adult patients with hematologic malignancy (HM) who have been hospitalized in the ICU. Death was one quality indicator; researchers used a machine learning approach to find determinants of death. As per the study, there have been 206 patients hospitalized in the ICU (mean age: 51.3 ± 13.6 years; 60% male). The average length of stay was three days, with 14.1% requiring extended ICU commitment. ICU death was 45.6% at 30 days, 62.6% at sixty days, and 74.3% at twelve months, rising to 59.2% at thirty days, 62.6% at sixty days, and 74.3% at twelve months. Ventilation systems and vasodilating medication were linked to higher ICU death, but admission to the ICU surgically and experiencing malignancies are linked with lower death rates. Patients with HM who are hospitalized in the ICU have a high mortality rate (45.6%), which rises to 74.3% after a year. Serious illness, postsurgical hospitalization, and malignancy were revealed as determinants of patient outcomes in multivariate analyses.


Assuntos
Neoplasias Hematológicas , Adulto , Estado Terminal , Feminino , Neoplasias Hematológicas/tratamento farmacológico , Mortalidade Hospitalar , Hospitalização , Humanos , Unidades de Terapia Intensiva , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Retrospectivos
3.
Expert Opin Drug Deliv ; 19(7): 873-882, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-35748094

RESUMO

INTRODUCTION: There is a constant drive to improve disease treatments. Much effort has been directed at identifying less immunogenic anti-cancer agents that produce fewer and less severe side effects. For more than a decade, bacteriophages have been discussed as an effective treatment for cancer with an exact mode of delivery. AREAS COVERED: We review how bacteriophages are used in cancer treatment, the underlying therapeutic mechanisms, and the tumor attacking peptide screening process. The filamentous bacteriophages are an effective vehicle for delivering displayed peptides toward the tumor target. The peptide must be expressed at the appropriate coat protein, and the peptide must be effective enough to disrupt the complex cancer matrix. The present review also sheds light on the dynamic use of phage in cancer treatment, from detection and diagnostics to treatment. EXPERT OPINION: Phage has a versatile role as a diagnostic and therapeutic tool. By acting as an appropriate recombinant drug, this phage has every potential to replace existing laborious, high capital investing therapies that may at many times result in failure or drastic side effects. One of the most significant challenges would be identifying tumor homing peptides. Although a few have been discovered, the most effective ones are yet to be determined. This therapeutic method plays a significant role in tumor therapy with high accuracy and efficiency, irrespective of the target location.


Assuntos
Bacteriófagos , Neoplasias , Bacteriófagos/genética , Bacteriófagos/metabolismo , Biologia , Detecção Precoce de Câncer , Humanos , Neoplasias/tratamento farmacológico , Neoplasias/terapia , Peptídeos
4.
Biomed Res Int ; 2022: 9223400, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35722463

RESUMO

A technique to predict crucial clinical prostate cancer (PC) is desperately required to prevent diagnostic errors and overdiagnosis. To create a multimodal model that incorporates long-established messenger RNA (mRNA) indicators and conventional risk variables for identifying individuals with severe PC on prostatic biopsies. Urinary has gathered for mRNA analysis following a DRE and before a prostatic examination in two prospective multimodal investigations. A first group (n = 489) generated the multimodal risk score, which was then medically verified in a second group (n = 283). The reverse transcription qualitative polymerase chain reaction determined the mRNA phase. Logistic regression was applied to predict risk in patients and incorporate health risks. The area under the curve (AUC) was used to compare models, and clinical efficacy was assessed by using a DCA. The amounts of sixth homeobox clustering and first distal-less homeobox mRNA have been strongly predictive of high-grade PC detection. In the control subjects, the multimodal method achieved a total AUC of 0.90, with the most important aspects being the messenger riboneuclic acid features' PSA densities and previous cancer-negative tests as a nonsignificant design ability to contribute to PSA, aging, and background. An AUC of 0.86 was observed for one more model that added DRE as an extra risk component. Two methods were satisfactorily verified without any significant changes within the area under the curve in the validation group. DCA showed a massive net advantage and the highest decrease in inappropriate costs.


Assuntos
Antígeno Prostático Específico , Neoplasias da Próstata , Biomarcadores Tumorais/análise , Biomarcadores Tumorais/genética , Biópsia , Humanos , Masculino , Estudos Prospectivos , Neoplasias da Próstata/diagnóstico , Neoplasias da Próstata/genética , Neoplasias da Próstata/patologia , RNA Mensageiro/genética , Fatores de Risco
5.
Artigo em Inglês | MEDLINE | ID: mdl-35082906

RESUMO

The CLEC-2 receptor protein belongs to the C-type lectin superfamily of transmembrane receptors that have one or more C-type lectin-like domains. CLEC-2 is a physiological binding receptor of podoplanin (PDPN), which is expressed on specific tumour cell types and involved in tumour cell-induced platelet aggregation and tumour metastasis. CLEC-2 and podoplanin-expressing tumour cells interact to increase angiogenesis, tumour development, and metastasis. CLEC-2 is a hemi-immunoreceptor tyrosine-based activation motif (hemi-ITAM) receptor located on platelets and a subset of dendritic cells that are expressed constitutively. This molecule is secreted by activated platelets around tumours and has been shown to inhibit platelet aggregation and tumour metastasis in colon carcinoma by binding to the surface of tumour cells. Pharmacokinetic studies were carried using a DrugLiTo, and molecular docking was performed using AutoDock Tools 1.5.6 (ADT). Twenty-nine bioactive compounds were included in the study, and four of them, namely, piperine, dihydrocurcumin, bisdemethoxycurcumin, and demothoxycurcumin, showed potential antagonist properties against the target. The resultant best bioactive was compared with commercially available standard drugs. Further, validation of respective compounds with an intensive molecular dynamics simulation was performed using Schrödinger software. To the best of our knowledge, this is the first report on major bioactive found on clove as natural antagonists for CLEC-2 computationally. To further validate the bioactive and delimit the screening process of potential drugs against CLEC-2, in vitro and in vivo studies are needed to prove their efficacy.

6.
Biomed Pharmacother ; 142: 111974, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34343895

RESUMO

To date, seven viruses have been reliably connected to various forms of human cancer: Epstein Barr Virus (EBV), Kaposi's sarcoma-associated herpesvirus (KSHV), high-risk Human papillomavirus (HPV), Merkel Cell Polyomavirus (MCPV), Hepatitis B virus (HBV), hepatitis C virus (HCV), and Human T-cell leukemia virus type 1 (HTLV1). This mini-review summarizes two of these viruses, EPV and HTLV-1, in terms of their general pathway of infection, the key mechanism of cancer induction, and the prominent technologies used to detect the infections. EBV is the first discovered human oncovirus and HTLV - I is the first human retrovirus and both were discovered from patient with distinct lymphoma clinical condition. Both the viruses can immortalize lymphocytes invitro and lymphomas are common manifestation of majority oncogenic viruses. Lymphomagenesis are discovered in associated with EBV, HTLV-I, Human Immunodeficiency virus (HIV), Kaposi sarcoma - associated herpes virus and hepatitis c virus. Later the undefined mechanism behind the induction of cancer by these viruses was unveiled gradually along with the responsible cofactors and mimicry mechanism. These two viruses contrast in their genetic structure, location of the infection, and latency, yet clinically, they generate similar cancer disorders. The major focus of this study is to brief the mechanism of these two unrelated viral cancer promoting agents on how they simulate a condition similar to lymphoma which may or may not undergo mimicry and cofactor utilization process, handpicked and vital genes behind the transformation mechanism are given accordingly.


Assuntos
Infecções por Vírus Epstein-Barr/complicações , Infecções por HTLV-I/complicações , Neoplasias/virologia , Carcinogênese , Infecções por Vírus Epstein-Barr/virologia , Infecções por HTLV-I/virologia , Herpesvirus Humano 4/isolamento & purificação , Herpesvirus Humano 4/patogenicidade , Vírus Linfotrópico T Tipo 1 Humano/isolamento & purificação , Vírus Linfotrópico T Tipo 1 Humano/patogenicidade , Humanos , Neoplasias/patologia
7.
Arch Microbiol ; 203(1): 251-260, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-32918098

RESUMO

Acinetobacter baumannii has emerged worldwide as a leading cause of hospital-acquired infections. Although A. baumannii was initially regarded to as a low-grade pathogen, evidence has been accumulated suggesting that A. baumannii infections are associated with increased mortality in critically ill patients. Here, we describe the efficacy of pyrogallol, a polyphenolic organic compound found in the galls and barks of various trees, which shows anti-biofilm and anti-virulence potential against A. baumannii. Pyrogallol shows concentration-based biofilm inhibition, as evidenced through light and confocal laser scanning microscopic analysis. The other virulence factors are protease, swarming motility, and extracellular polymeric substances that are also inhibited by pyrogallol. Through real-time PCR, it was found that pyrogallol downregulates expression of the biofilm and virulence-related ompA, bap, csuA/B, katE, pgaA, and pgaC genes. Furthermore, pyrogallol moderately inhibited the mature biofilms of A. baumannii in a concentration-dependent manner (5, 10, and 20 µg/ml). The present study reports that the anti-biofilm and anti-virulence potential of pyrogallol disrupts the biofilm formation, adherence of cells, and cell-to-cell signaling mechanism of A. baumannii. Thus, pyrogallol is a promising therapeutic agent for A. baumannii-related infections.


Assuntos
Acinetobacter baumannii/efeitos dos fármacos , Infecção Hospitalar/prevenção & controle , Regulação Bacteriana da Expressão Gênica/efeitos dos fármacos , Pirogalol/farmacologia , Fatores de Virulência/genética , Antibacterianos/farmacologia , Biofilmes/efeitos dos fármacos , Infecção Hospitalar/microbiologia , Perfilação da Expressão Gênica , Humanos
8.
Mol Ther Nucleic Acids ; 22: 352-361, 2020 Dec 04.
Artigo em Inglês | MEDLINE | ID: mdl-33230440

RESUMO

Oral squamous cell carcinoma (OSCC) is a highly recurrent form of cancer arising from the oral epithelium, which is the result of mutational change due to etiological factors such as tobacco, smoking, chewing of areca nuts, and alcohol consumption. OSCC occurrence has been observed to be prevalent in different regions of Pacific countries and in most Asian countries. Despite the accessibility of the oral cavity, OSCC is diagnosed at an extremely late stage of pathogenic tumor node metastasis pTNM (III-IV), resulting in a poor prognosis for the individual. Therefore, it is important to make definitive, early, and efficient diagnoses. Owing to the development of omic-natured studies, the presence of proteins, transcribed elements, metabolic products, and even microflora detected in saliva helps us to select biomarkers, which is an especially exciting potential because of the availability and the non-invasive nature of sample collection. Since the discovery of circular RNA (circRNA) by Sanger sequencing, it has been reported to play a pivotal role in several human diseases, including cancer. circRNA functions as a microRNA (miRNA) sponge in the regulation of mRNA expression, forming the circRNA-miRNA regulatory axis. In the case of OSCC, overexpression of different circRNAs exhibits both tumor-progressive and tumor-suppressive effects.

9.
Int J Biol Macromol ; 88: 18-26, 2016 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-27016087

RESUMO

The present study reports on the synthesis of chitosan nanoparticles (CNPs) using methanol extracts of Gymnema sylvestre (GS) leaves and Cinnamomum zeylanicum (CZ) bark. Biomolecule-loaded nanoparticles induced apoptosis in a human cervical cancer (SiHa) cell line, and experiments were carried out to elucidate the underlying molecular mechanisms. FT-IR and XRD showed possible functional groups of the biomolecules and the crystalline nature of CNPs, respectively. Transmission electron microscopy images revealed that synthesized GSCNPs and CZCNPs had a smooth spherical shape with average sizes of about 58-80 and 60-120nm, respectively. Dynamic light scattering studies indicated that both GSCNPs and CZCNs were structurally stable with homogenous and heterogeneous natures, respectively. Furthermore, synthesized GSCNPs and CZCNPs exhibited dose-dependent cytotoxicity against the SiHa cancer cell line, with inhibitory concentration (IC50) values of 102.17µg/ml, 87.75µg/ml, 132.74µg/ml and 90.35µg/ml for GS leaf extract, GSCNPs, CZBE and CZCNPs, respectively.


Assuntos
Quitosana/química , Cinnamomum zeylanicum/química , Células Epiteliais/efeitos dos fármacos , Gymnema sylvestre/química , Nanopartículas/química , Extratos Vegetais/farmacologia , Caspases/metabolismo , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Colo do Útero/efeitos dos fármacos , Colo do Útero/metabolismo , Colo do Útero/patologia , Relação Dose-Resposta a Droga , Composição de Medicamentos , Células Epiteliais/metabolismo , Células Epiteliais/patologia , Feminino , Humanos , Metanol , Nanopartículas/ultraestrutura , Tamanho da Partícula , Casca de Planta/química , Extratos Vegetais/isolamento & purificação , Folhas de Planta/química , Solventes
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