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1.
Crit Rev Immunol ; 44(5): 41-50, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38618727

RESUMO

Gene therapy is a particularly useful treatment for nervous system genetic diseases, including those induced especially by infectious organisms and antigens, and is being utilized to treat Hodgkin's disease (HD). Due to the possible clonal relationship between both disorders, immunotherapy directed against CD20 positive cells may be a more effective treatment in patients with persistent HD and NHL. HL growth can be inhibited both in vitro and in vivo by AdsIL-13Ralpha2. High-dose treatment combined with stem cell transplantation has been effective in treating HIV-negative lymphoma that has progressed to high-risk or relapsed disease. For therapy, LMP2-specific CTL will be used. Furthermore, it is possible to view the cytotoxicity of genetically modified adenoviruses that express proteins such as p27Kip1, p21Waf1, and p16INK4A as a foundational element for (2,5)-derived ALCL genetic treatment for Hodgkin's disease.


Assuntos
Transplante de Células-Tronco Hematopoéticas , Doença de Hodgkin , Humanos , Doença de Hodgkin/genética , Doença de Hodgkin/terapia , Imunoterapia
2.
Crit Rev Eukaryot Gene Expr ; 34(1): 1-13, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-37824388

RESUMO

Destruction of the tumor (cancerous) cells may be caused by live viruses, which have replicative ability and replicate selectively in tumor cells, known as oncolytic virotherapy. In comparison of conservative cancer therapy, tumor-selective replicating viruses have more advantages. These viruses have introduced new methodologies for the human cancer treatment. Numerous strategies are used in development of virotherapeutics. Virotherapy is not unusual concept, but modern advances in technology of genetic modification of oncolytic viruses have improved the ability of targeting tumor cells more specifically, it triggered the development of novel ammunition to fight cancer. An effective virotherapeutic approach with oncolytic viruses exhibits the feasibility and safety under clinical approach. New strategies are being explored to overcome basic obstacles and challenges in virotherapy. Administration of oncolytic viruses, logically, will successfully augment new treatments against many kinds of tumors. Some encouraging antitumor responses shown by combination therapy are provoking strong immunity against established cancer. Chief developments in oncolytic virotherapy have seen in past several years. Significant understandings have been provided by findings on the interface among immune comebacks and viruses, whereas potential results have shown in clinical trials.


Assuntos
Neoplasias , Terapia Viral Oncolítica , Vírus Oncolíticos , Humanos , Terapia Viral Oncolítica/métodos , Neoplasias/terapia , Vírus Oncolíticos/genética , Terapia Combinada
3.
Crit Rev Eukaryot Gene Expr ; 34(2): 15-31, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38073439

RESUMO

In this review, there is a complete description of the classes of arboviruses, their evolutionary process, virus characterization, disease transmission methods; it also describes about the vectors involved in transmission and their mood of transmission, both biologically as well as non-biologically and, about host, the resistance mechanism in host, and artificial methods of preventing those viral transmissions. Arboviruses transmitted to hosts by some vectors such as mosquitoes, ticks, etc. The virus replicates in the host can be prevented by some host resistance mechanisms like RNA interference (RNAi), which degrade virus RNA by its antiviral activity, insect repellents, IGRs, and PI technology.


Assuntos
Arbovírus , Humanos , Animais , Arbovírus/genética , Replicação Viral , Interferência de RNA , Evolução Biológica , Mosquitos Vetores
4.
Crit Rev Eukaryot Gene Expr ; 34(2): 1-13, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38073438

RESUMO

Neuroblastoma is a malignant tumor of neuroblasts, immature nerve cells found in several areas of the body. It usually affects children under age of 5. As usual, the tumor has ability to grow rapidly and to expand vastly which ultimately leads to death. Mostly, management decisions can be drawn by the prediction of the stage of the disease as well as age at the time of its diagnosis. There are four main stages of neuroblastoma, and treatment is according to the low and high risk of the disease. Several cytotoxic agents along with other therapies (antibody therapy, gene therapy, and even immunological therapies, antiangiogenic therapy, etc.) are used. Immunotherapy also has an important treatment option used nowadays for neuroblastoma. The discovery of major neuroblastoma-predisposition gene anaplastic lymphoma kinase cause somatic transformation or gene strengthening in diagnosed neuroblastoma. Promising new antiangiogenic strategies have also been introduced for the treatment of neuroblastoma with multiple mylomas. To manage numerous myelomas and cancers, including neuroblastoma, bone marrow transplantation and peripheral blood stem cell transplantation may be used.


Assuntos
Neuroblastoma , Humanos , Neuroblastoma/genética , Neuroblastoma/terapia , Neuroblastoma/patologia
5.
BMC Plant Biol ; 24(1): 642, 2024 Jul 08.
Artigo em Inglês | MEDLINE | ID: mdl-38972980

RESUMO

Among the several threats to humanity by anthropogenic activities, contamination of the environment by heavy metals is of great concern. Upon entry into the food chain, these metals cause serious hazards to plants and other organisms including humans. Use of microbes for bioremediation of the soil and stress mitigation in plants are among the preferred strategies to provide an efficient, cost-effective, eco-friendly solution of the problem. The current investigation is an attempt in this direction where fungal strain PH1 was isolated from the rhizosphere of Parthenium hysterophorus which was identified as Aspergillus niger by sequence homology of the ITS 1 and ITS 4 regions of the rRNA. The strain was tested for its effect on growth and biochemical parameters as reflection of its potential to mitigate Pb stress in Zea mays exposed to 100, 200 and 500 µg of Pb/g of soil. In the initial screening, it was revealed that the strain has the ability to tolerate lead stress, solubilize insoluble phosphate and produce plant growth promoting hormones (IAA and SA) and other metabolites like phenolics, flavonoids, sugar, protein and lipids. Under 500 µg of Pb/g of soil, Z. mays exhibited significant growth retardation with a reduction of 31% in root length, 30.5% in shoot length, 57.5% in fresh weight and 45.2% in dry weight as compared to control plants. Inoculation of A. niger to Pb treated plants not only restored root and shoot length, rather promoted it to a level significantly higher than the control plants. Association of the strain modulated the physio-hormonal attributes of maize plants that resulted in their better growth which indicated a state of low stress. Additionally, the strain boosted the antioxidant defence system of the maize there by causing a significant reduction in the ascorbic acid peroxidase (1.5%), catalase (19%) and 1,1-diphenyl-2 picrylhydrazyl (DPPH) radical scavenging activity (33.3%), indicating a lower stress condition as compared to their non-inoculated stressed plants. Based on current evidence, this strain can potentially be used as a biofertilizer for Pb-contaminated sites where it will improve overall plant health with the hope of achieving better biological and agricultural yields.


Assuntos
Antioxidantes , Aspergillus niger , Chumbo , Fosfatos , Fotossíntese , Zea mays , Zea mays/crescimento & desenvolvimento , Zea mays/microbiologia , Zea mays/efeitos dos fármacos , Zea mays/metabolismo , Aspergillus niger/metabolismo , Chumbo/metabolismo , Antioxidantes/metabolismo , Fotossíntese/efeitos dos fármacos , Fosfatos/metabolismo , Poluentes do Solo/metabolismo , Estresse Fisiológico , Biodegradação Ambiental
6.
BMC Plant Biol ; 24(1): 815, 2024 Aug 29.
Artigo em Inglês | MEDLINE | ID: mdl-39210254

RESUMO

Enhanced phytoremediation offers a rapid and eco-friendly approach for cleaning agricultural soil contaminated with copper and cadmium which pose a direct threat to food scarcity and security. The current study aimed to compare the effectiveness of the two commonly used additives, IAA and EDTA, for the remediation of copper (Cu) and cadmium (Cd) contaminated soils using sunflower and maize. The plants were cultivated in pots under controlled conditions with four sets of treatments: control (0), Cu50/Cd50, Cu50/Cd50 + EDTA, and Cu50/Cd50 + IAA. The results showed that Cu50/Cd50 mg/kg drastically compromised the phytoremediation potential of both plants, as evident by reduced shoot and root length, and lower biomass. However, the augmentation of Cu50/Cd50 with EDTA or IAA improved the tested parameters. In sunflower, EDTA enhanced the accumulation of Cu and Cd by 58% and 21%, respectively, and improved plant biomass by 41%, compared to control treatment. However, IAA exhibited higher accumulation of Cu and Cd by 64% and 25%, respectively, and enhanced plant biomass by 43%. In case of maize, IAA was superior to EDTA which enhanced the accumulation of Cu and Cd by 87% and 32% respectively, and increased the plant biomass by 57%, compared to control treatment. Our findings demonstrate that foliar IAA is more effective than EDTA in enhancing the phytoremediation potential of sunflower and maize for Cu and Cd.


Assuntos
Biodegradação Ambiental , Cádmio , Cobre , Ácido Edético , Helianthus , Ácidos Indolacéticos , Poluentes do Solo , Zea mays , Cádmio/metabolismo , Ácido Edético/farmacologia , Cobre/metabolismo , Poluentes do Solo/metabolismo , Helianthus/metabolismo , Helianthus/efeitos dos fármacos , Zea mays/metabolismo , Zea mays/crescimento & desenvolvimento , Zea mays/efeitos dos fármacos , Ácidos Indolacéticos/metabolismo , Raízes de Plantas/metabolismo , Raízes de Plantas/efeitos dos fármacos , Raízes de Plantas/crescimento & desenvolvimento , Biomassa , Solo/química
7.
Crit Rev Immunol ; 43(3): 15-24, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37824374

RESUMO

Oral candidiasis is a common but most harmful oral cavity infection caused by yeast-like fungus, this condition is called Oropharyngeal candidiasis. There are various species of candida that are responsible for oral cavity fungal infection including mostly Candida albicans. Different candida infections may be acute and chronic. Cell-mediated immunity, humoral immunity, and granulocytes are the immune factors for the cause of this infection. Different antifungal drugs like nystatin, fluconazole, and amphotericin are used to treat oral cavity fungal infections.


Assuntos
Candidíase Bucal , Candidíase , Humanos , Candidíase Bucal/tratamento farmacológico , Candidíase Bucal/etiologia , Antifúngicos/uso terapêutico , Fluconazol/uso terapêutico , Candidíase/tratamento farmacológico , Candidíase/etiologia , Candida albicans
8.
Sensors (Basel) ; 24(1)2024 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-38203117

RESUMO

For amputees, amputation is a devastating experience. Transfemoral amputees require an artificial lower limb prosthesis as a replacement for regaining their gait functions after amputation. Microprocessor-based transfemoral prosthesis has gained significant importance in the last two decades for the rehabilitation of lower limb amputees by assisting them in performing activities of daily living. Commercially available microprocessor-based knee joints have the needed features but are costly, making them beyond the reach of most amputees. The excessive cost of these devices can be attributed to custom sensing and actuating mechanisms, which require significant development cost, making them beyond the reach of most amputees. This research contributes to developing a cost-effective microprocessor-based transfemoral prosthesis by integrating off-the-shelf sensing and actuating mechanisms. Accordingly, a three-level control architecture consisting of top, middle, and low-level controllers was developed for the proposed prosthesis. The top-level controller is responsible for identifying the amputee intent and mode of activity. The mid-level controller determines distinct phases in the activity mode, and the low-level controller was designed to modulate the damping across distinct phases. The developed prosthesis was evaluated on unilateral transfemoral amputees. Since off-the-shelf sensors and actuators are used in i-Inspire, various trials were conducted to evaluate the repeatability of the sensory data. Accordingly, the mean coefficients of correlation for knee angle, force, and inclination were computed at slow and medium walking speeds. The obtained values were, respectively, 0.982 and 0.946 for knee angle, 0.942 and 0.928 for knee force, and 0.825 and 0.758 for knee inclination. These results confirmed that the data are highly correlated with minimum covariance. Accordingly, the sensors provide reliable and repeatable data to the controller for mode detection and intent recognition. Furthermore, the knee angles at self-selected walking speeds were recorded, and it was observed that the i-Inspire Knee maintains a maximum flexion angle between 50° and 60°, which is in accordance with state-of-the-art microprocessor-based transfemoral prosthesis.


Assuntos
Atividades Cotidianas , Articulação do Joelho , Humanos , Articulação do Joelho/cirurgia , Extremidade Inferior , Amputação Cirúrgica , Microcomputadores
9.
Crit Rev Eukaryot Gene Expr ; 33(8): 1-10, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37606160

RESUMO

AIDS dementia complex (ADC) is a nervous system disorder that harms the neurons in different parts of the brain. Various features are involved in altering the normal activities of neurons. Neurotoxicity is induced due to HIV viral proteins such as gp120, SDF, Tat, etc. These proteins target macrophages, glial cells, astrocytes, and release neurotoxins. These neurotoxins proved harmful for the neurons, caused apoptotic cell death by raising calcium, glutamate level and by producing various free radicals such as nitric oxide (NO·). Lipid peroxidation and lipids rafts also play a vital role in producing toxicity and apoptotic cell death. Membrane associated oxidative stress, cognitive impairment, and high level of HNE (4-hydroxynonenal); all are involved in ADC pathogenesis.


Assuntos
Complexo AIDS Demência , Síndrome da Imunodeficiência Adquirida , Humanos , Neurotoxinas , Síndrome da Imunodeficiência Adquirida/complicações , Encéfalo , Apoptose
10.
Altern Ther Health Med ; 29(4): 234-239, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-34144527

RESUMO

People prefer to use medicinal plants rather than chemical compounds because they are low cost and have fewer adverse events. Zingiber officinale Roscoe is a natural dietary rhizome with anti-oxidative, anti-inflammatory and anti-carcinogenic properties. Tribulus terrestris L. has been used for the treatment of impotence, to enhance sexual drive and performance and for its diuretic and uricosuric effects. The aim of this study was to evaluate the combined effect of 2 extracts, Tribulus terristris and Zingiber officinale (TZ) for antioxidant, enzyme modulation, liver function, kidney function, blood profile and anti-hypertensive effects, which may pave the way for possible therapeutic applications. Antioxidant potential was measured with the 2,2-diphenyl-1-picryl-hydrazyl-hydrate free radical method antioxidant assay (DPPH) and kojic acid was used as the standard drug for tyrosine inhibition assay. The effect of TZ on biochemical parameters of the liver (alanine transferase [ALT], alkaline phosphatase [ALP], aspartate aminotransferase [AST], total serum protein, total serum albumin, serum bilirubin), kidney (blood urea and creatinine) and hematology (hemoglobin, red blood cells [RBC], platelets, thin-layer chromatography, neutrophils, eosinophils, lymphocytes, monocytes, mean corpuscular volume, mean corpuscular hemoglobin and mean corpuscular hemoglobin concentration) of Wister rats were studied by administering 100, 250 and 500 mg/kg-1 body weight TZ dose orally for 28 days. Antihypertensive effects were measured by the invasive method. The results showed that the scavenging percentage of TZ was 78.5 to 80.4, with an IC50 value of 1166.7 µg/ ml and tyrosinase inhibition was 72% compared with 93% for kojic acid. Different doses (100, 250 and 500 mg/kg) did not show an increase in serum biomarkers of liver and renal parameters. A significant increase in hemoglobin, erythrocytes, hematocrit, white blood cells (WBC) and lymphocytes with no significant increase/decrease in platelet count was observed but blood pressure was significantly decreased. Therefore, we concluded that TZ is safe and can be used in the treatment of hypertension.


Assuntos
Tribulus , Zingiber officinale , Masculino , Ratos , Animais , Antioxidantes/farmacologia , Antioxidantes/uso terapêutico , Anti-Hipertensivos/farmacologia , Anti-Hipertensivos/uso terapêutico , Zingiber officinale/química , Zingiber officinale/metabolismo , Metanol/metabolismo , Metanol/farmacologia , Tribulus/metabolismo , Ratos Wistar , Fígado , Extratos Vegetais/farmacologia , Extratos Vegetais/uso terapêutico , Extratos Vegetais/química
11.
J Environ Manage ; 344: 118529, 2023 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-37418912

RESUMO

Organic matter decomposition is a biochemical process with consequences affecting climate change and ecosystem productivity. Once decomposition begins, C is lost as CO2 or sequestered into more recalcitrant carbon difficult to further degradation. As microbial respiration releases carbon dioxide into the atmosphere, microbes act as gatekeepers in the whole process. Microbial activities were found to be the second largest CO2 emission source in the environment after human activities (industrialization), and research investigations suggest that this may have affected climate change over the past few decades. It is crucial to note that microbes are major contributors in the whole C cycle (decomposition, transformation, and stabilization). Therefore, imbalances in the C cycle might be causing changes in the entire carbon content of the ecosystem. The significance of microbes, especially soil bacteria in the terrestrial carbon cycle requires more attention. This review focuses on the factors that affect microorganism behavior during the breakdown of organic materials. The key factors affecting the microbial degradation processes are the quality of the input material, nitrogen, temperature, and moisture content. In this review, we suggest that to address global climate change and its effects on agricultural systems and vice versa, there is a need to double-up on efforts and conduct new research studies to further evaluate the potential of microbial communities to reduce their contribution to terrestrial carbon emission.


Assuntos
Ecossistema , Microbiota , Humanos , Dióxido de Carbono/análise , Agricultura , Solo/química , Mudança Climática , Microbiologia do Solo
12.
Molecules ; 28(14)2023 Jul 13.
Artigo em Inglês | MEDLINE | ID: mdl-37513261

RESUMO

The development of novel scaffolds that can increase the effectiveness, safety, and convenience of medication therapy using drug conjugates is a promising strategy. As a result, drug conjugates are an active area of research and development in medicinal chemistry. This research demonstrates acetamide-sulfonamide scaffold preparation after conjugation of ibuprofen and flurbiprofen with sulfa drugs, and these scaffolds were then screened for urease inhibition. The newly designed conjugates were confirmed by spectroscopic techniques such as IR, 1HNMR, 13CNMR, and elemental analysis. Ibuprofen conjugated with sulfathiazole, flurbiprofen conjugated with sulfadiazine, and sulfamethoxazole were found to be potent and demonstrated a competitive mode of urease inhibition, with IC50 (µM) values of 9.95 ± 0.14, 16.74 ± 0.23, and 13.39 ± 0.11, respectively, and urease inhibition of 90.6, 84.1, and 86.1% respectively. Ibuprofen conjugated with sulfanilamide, sulfamerazine, and sulfacetamide, whereas flurbiprofen conjugated with sulfamerazine, and sulfacetamide exhibited a mixed mode of urease inhibition. Moreover, through molecular docking experiments, the urease receptor-binding mechanisms of competitive inhibitors were anticipated, and stability analysis through MD simulations showed that these compounds made stable complexes with the respective targets and that no conformational changes occurred during the simulation. The findings demonstrate that conjugates of approved therapeutic molecules may result in the development of novel classes of pharmacological agents for the treatment of various pathological conditions involving the urease enzyme.


Assuntos
Flurbiprofeno , Simulação de Acoplamento Molecular , Flurbiprofeno/farmacologia , Ibuprofeno/farmacologia , Inibidores Enzimáticos/farmacologia , Sulfacetamida , Cinética , Urease , Sulfamerazina , Canavalia , Relação Estrutura-Atividade , Sulfanilamida , Sulfonamidas/farmacologia , Estrutura Molecular
13.
Angew Chem Int Ed Engl ; 62(31): e202301497, 2023 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-36912737

RESUMO

Ionic liquids (ILs) are considered to be potential material devices for CO2 capturing and conversion to energy-adducts. They form a cage (confined-space) around the catalyst providing an ionic nano-container environment which serves as physical-chemical barrier that selectively controls the diffusion of reactants, intermediates, and products to the catalytic active sites via their hydrophobicity and contact ion pairs. Hence, the electronic properties of the catalysts in ILs can be tuned by the proper choice of the IL-cations and anions that strongly influence the residence time/diffusion of the reactants, intermediates, and products in the nano-environment. On the other hand, ILs provide driving force towards photocatalytic redox process to increase the CO2 photoreduction. By combining ILs with the semiconductor, unique solid semiconductor-liquid commodities are generated that can lower the CO2 activation energy barrier by modulating the electronic properties of the semiconductor surface. This mini-review provides a brief overview of the recent advances in IL assisted thermal conversion of CO2 to hydrocarbons, formic acid, methanol, dimethyl carbonate, and cyclic carbonates as well as its photo-conversion to solar fuels.

14.
Sensors (Basel) ; 22(10)2022 May 19.
Artigo em Inglês | MEDLINE | ID: mdl-35632272

RESUMO

Faults frequently occur in the sensors and actuators of process machines to cause shutdown and process interruption, thereby creating costly production loss. centrifugal compressors (CCs) are the most used equipment in process industries such as oil and gas, petrochemicals, and fertilizers. A compressor control system called an anti-surge control (ASC) system based on many critical sensors and actuators is used for the safe operation of CCs. In this paper, an advanced active fault-tolerant control system (AFTCS) has been proposed for sensor and actuator faults of the anti-surge control system of a centrifugal compressor. The AFTCS has been built with a dedicated fault detection and isolation (FDI) unit to detect and isolate the faulty part as well as replace the faulty value with the virtual redundant value from the observer model running in parallel with the other healthy sensors. The analytical redundancy is developed from the mathematical modeling of the sensors to provide estimated values to the controller in case the actual sensor fails. Dual hardware redundancy has been proposed for the anti-surge valve (ASV). The simulation results of the proposed Fault-tolerant control (FTC) for the ASC system in the experimentally validated CC HYSYS model reveal that the system continued to operate in the event of faults in the sensors and actuators maintaining system stability. The proposed FTC for the ASC system is novel in the literature and significant for the process industries to design a highly reliable compressor control system that would continue operation despite faults in the sensors and actuators, hence preventing costly production loss.

15.
Molecules ; 27(6)2022 Mar 09.
Artigo em Inglês | MEDLINE | ID: mdl-35335144

RESUMO

A targeted delivery system is primarily intended to carry a potent anticancer drug to specific tumor sites within the bodily tissues. In the present study, a carrier system has been designed using folic acid (FA), bis-amine polyethylene glycol (PEG), and an anticancer drug, 5-fluorouracil (5-FU). FA and PEG were joined via an amide bond, and the resulting FA-PEG-NH2 was coupled to 5-FU producing folate-polyethylene glycol conjugated 5-fluorouracil (FA-PEG-5-FU). Spectroscopic techniques (UV-Vis, 1HNMR, FTIR, and HPLC) were used for the characterization of products. Prodrug (FA-PEG-5-FU) was analyzed for drug release profile (in vitro) up to 10 days and compared to a standard anticancer drug (5-FU). Folate conjugate was also analyzed to study its folate receptors (FR) mediated transport and in vitro cytotoxicity assays using HeLa cancer cells/Vero cells, respectively, and antitumor activity in tumor-bearing mice models. Folate conjugate showed steady drug release patterns and improved uptake in the HeLa cancer cells than Vero cells. Folate conjugate treated mice group showed smaller tumor volumes; specifically after the 15th day post-treatment, tumor sizes were decreased significantly compared to the standard drug group (5-FU). Molecular docking findings demonstrated importance of Trp138, Trp140, and Lys136 in the stabilization of flexible loop flanking the active site. The folic acid conjugated probe has shown the potential of targeted drug delivery and sustained release of anticancer drug to tumor lesions with intact antitumor efficacy.


Assuntos
Fluoruracila , Polietilenoglicóis , Animais , Linhagem Celular Tumoral , Chlorocebus aethiops , Fluoruracila/química , Fluoruracila/farmacologia , Ácido Fólico/química , Humanos , Camundongos , Simulação de Acoplamento Molecular , Polietilenoglicóis/química , Células Vero
16.
Molecules ; 27(2)2022 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-35056690

RESUMO

Thanks to stem cells' capability to differentiate into multiple cell types, damaged human tissues and organs can be rapidly well-repaired. Therefore, their applicability in the emerging field of regenerative medicine can be further expanded, serving as a promising multifunctional tool for tissue engineering, treatments for various diseases, and other biomedical applications as well. However, the differentiation and survival of the stem cells into specific lineages is crucial to be exclusively controlled. In this frame, growth factors and chemical agents are utilized to stimulate and adjust proliferation and differentiation of the stem cells, although challenges related with degradation, side effects, and high cost should be overcome. Owing to their unique physicochemical and biological properties, graphene-based nanomaterials have been widely used as scaffolds to manipulate stem cell growth and differentiation potential. Herein, we provide the most recent research progress in mesenchymal stem cells (MSCs) growth, differentiation and function utilizing graphene derivatives as extracellular scaffolds. The interaction of graphene derivatives in human and rat MSCs has been also evaluated. Graphene-based nanomaterials are biocompatible, exhibiting a great potential applicability in stem-cell-mediated regenerative medicine as they may promote the behaviour control of the stem cells. Finally, the challenges, prospects and future trends in the field are discussed.


Assuntos
Células-Tronco Mesenquimais
17.
Langmuir ; 37(16): 4984-4996, 2021 04 27.
Artigo em Inglês | MEDLINE | ID: mdl-33861930

RESUMO

Hydroxyapatite (HA) coating has received significant attention in the scientific community for the development of implants, and HA coating on titanium oxide (TiO2) nanotubes has shown potential benefits in the improvement of cell proliferation, adhesion, and differentiation. In this study, a HA coating on a TiO2 nanotubular surface was developed to improve the biocompatibility of the titanium (Ti) surface via magnetron sputtering. Scanning electron microscopy (SEM), surface profilometry, and water contact goniometry revealed that HA-coated TiO2 nanotubes influenced the surface roughness (Ra) and hydrophilicity. The XRD and FTIR peaks indicated the presence of crystalline phases of TiO2 (anatase) and HA-coated TiO2 nanotubes after annealing at 500 °C for 120 min. The HA-coated TiO2 nanotubes showed significantly increased Ra and decreased water contact angle (θ) compared to the as-anodized TiO2 nanotubular and bare CP-Ti surfaces. MTS assay using osteoblast-like cells confirmed that the HA-coated TiO2 nanotubular surface provided an enhanced cell attachment and growth when compared to as-anodized TiO2 nanotubular and pure CP-Ti surfaces.

18.
World J Microbiol Biotechnol ; 37(11): 195, 2021 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-34651251

RESUMO

Heavy metal contamination due to anthropogenic activities is a great threat to modern humanity. A novel and natural technique of bioremediation using microbes for detoxification of heavy metals while improving plants' growth is the call of the day. In this study, exposing soybean plants to different concentrations (i.e., 10 and 50 ppm) of chromium and arsenic showed a severe reduction in agronomic attributes, higher reactive oxygen species production, and disruption in the antioxidant system. Contrarily, rhizobacterial isolate C18 inoculation not only rescued host growth, but also improved the production of nonenzymatic antioxidants (i.e., flavonoids, phenolic, and proline contents) and enzymatic antioxidants i.e., catalases, ascorbic acid oxidase, peroxidase activity, and 1,1-diphenyl-2-picrylhydrazyl, lower reactive oxygen species accumulation in leaves. Thereby, lowering secondary oxidative stress and subsequent damage. The strain was identified using 16 S rDNA sequencing and was identified as Pseudocitrobacter anthropi. Additionally, the strain can endure metals up to 1200 ppm and efficient in detoxifying the effect of chromium and arsenic by regulating phytohormones (IAA 59.02 µg/mL and GA 101.88 nM/mL) and solubilizing inorganic phosphates, making them excellent phytostimulant, biofertilizers, and heavy metal bio-remediating agent.


Assuntos
Antioxidantes/metabolismo , Enterobacteriaceae/metabolismo , Glycine max/metabolismo , Glycine max/microbiologia , Metais Pesados/metabolismo , Reguladores de Crescimento de Plantas/metabolismo , Arsênio/metabolismo , Arsênio/toxicidade , Biodegradação Ambiental , Cromo/metabolismo , Cromo/toxicidade , Enterobacteriaceae/efeitos dos fármacos , Enterobacteriaceae/crescimento & desenvolvimento , Enterobacteriaceae/isolamento & purificação , Ácidos Indolacéticos/metabolismo , Metaboloma , Metais Pesados/toxicidade , Oxirredução , Estresse Oxidativo , Fosfatos/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Rizosfera , Poluentes do Solo/metabolismo , Poluentes do Solo/toxicidade , Glycine max/crescimento & desenvolvimento
19.
Pak J Pharm Sci ; 34(1): 185-196, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34248019

RESUMO

The role of nanobiotechnology in the treatment of diseases is limitless. In this review we tried to focus main aspects of nanotechnology in drug carrier systems for treatment and diagnosis of various diseases such as cancer, pulmonary diseases, infectious diseases, vaccine development, diabetes mellitus and the role of nanotechnology on our economy and its positive social impacts on our community. We discussed here about the different "Biotechnano Strategies" to develop new avenues and ultimately improve the treatment of multiple diseases.


Assuntos
Biotecnologia/tendências , Portadores de Fármacos/administração & dosagem , Nanotecnologia/tendências , Desenvolvimento de Vacinas/tendências , Animais , Biotecnologia/economia , Doenças Transmissíveis/tratamento farmacológico , Doenças Transmissíveis/economia , Portadores de Fármacos/economia , Humanos , Nanotecnologia/economia , Neoplasias/tratamento farmacológico , Neoplasias/economia , Desenvolvimento de Vacinas/economia
20.
Pak J Pharm Sci ; 34(4(Supplementary)): 1509-1517, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-34799326

RESUMO

Due to the emerging mortality rate of colorectal cancer there is a high need for the management and control of this disease. Although several treatment approaches are being developed day by day yet the high incidence rate of colorectal cancer is still not controlled. To ease in the development of treatment therapies for colorectal cancer two derivatives of ethyl 2-aminothiazole 4-carboxylate were designed and synthesized. The compounds Ethyl 2-(2-(1,3-dioxoisoindolin-2-yl)acetamido)thiazole-4-carboxylate (5a) and ethyl 2-(2-(1,3-dioxoisoindolin-2-yl)-3-phenylpropanamido)thiazole-4-carboxylate (5b) were characterized and studied for their anti-cancer activities. The in silico molecular modeling studies were performed against the target protein beta-catenin which is an important player in the progression of colorectal cancer. The in silico ADMET studies were performed to assess the basic physicochemical properties of these compounds. The in vitro antiproliferative assay and the enzyme inhibitory assay was performed to validate the role of these compounds in the colorectal cancer. The preliminary cytotoxic assay and the MTT assay of the compounds 5a and 5b against the colorectal cancer cell line HCT 116 showed 60% inhibition of cell proliferation with IC50 of 0.72µM and 1.55µM, respectively. The standard methotrexate showed IC50 of 0.7µM showing potent inhibitory action of these compounds. The in vitro validation of the anti-cancer effect of both compounds revealed significant inhibition of beta-catenin concentration at higher doses as compared to control. Both the in vitro and in vivo assays of compounds showed effective anti-cancer activities and depicts the future potential of these compounds in colorectal cancer.


Assuntos
Aminoácidos/química , Antineoplásicos/síntese química , Antineoplásicos/farmacologia , Desenho de Fármacos , Tiazóis/química , Animais , Antineoplásicos/farmacocinética , Artemia , Neoplasias Colorretais/tratamento farmacológico , Células HCT116 , Humanos , Modelos Moleculares , Simulação de Acoplamento Molecular , Estrutura Molecular , Conformação Proteica
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