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1.
Langmuir ; 40(2): 1381-1398, 2024 01 16.
Artículo en Inglés | MEDLINE | ID: mdl-38159065

RESUMEN

In order to better understand the bioavailability and biocompatibility of polyphenol-assisted surface-modified bioengineered nanoparticles in nanomedicine applications, here, we address a series of photophysical experiments to quantify the binding affinity of serum albumin toward polyphenol-capped gold nanoparticles. For this, two different gold nanoparticles (AuNPs) were synthesized via the green synthesis approach, where curcumin and turmeric extract act as reducing as well as capping agents. The size, surface charge, and surface plasmon bands of the AuNPs were highly affected by the adsorption of human serum albumin (HSA) during protein corona formation, which was investigated using dynamic light scattering (DLS), ξ-potential, ultraviolet-visible (UV-vis) spectroscopy, and transmission electron microscopy (TEM) measurements. Fluorescence-based methods, absorbance, and SERS experiments were carried out to evaluate the binding aspects of AuNPs with HSA. We found that the AuNPs show moderate binding affinity toward HSA (Kb ∼ 104 M-1), irrespective of the capping agents on the surface. Hydrophobic association, along with some contribution of electrostatic interaction, played a key role in the binding process. The binding interaction was more toward the subdomain IIA region of HSA, as indicated by the competitive displacement studies using site-specific binders (warfarin and flufenamic acid). Because of the large surface curvature of small-sized AuNPs, the secondary structural conformations of HSA were slightly altered, as revealed by circular dichroism (CD), Fourier transform infrared (FT-IR) spectroscopy, and surface-enhanced Raman scattering (SERS) measurements. Additionally, the findings of the binding interactions were re-evaluated using molecular dynamics (MD) simulation studies by determining the root-mean-square deviation (RMSD), root-mean-square fluctuation (RMSF), radius of gyration (Rg), and changes in the binding energy of HSA upon complexation with AuNPs. To determine the tentative evidence for pharmacokinetic administration, these biocompatible AuNPs were applied to inhibit the amyloid fibril formation of HSA and monitored by using the thioflavin T (ThT) assay, ANS fluorescence assay, fluorescence microscopic imaging, and FESEM. AuNPs were found to show better resistance toward fibrillation of the adsorbed protein.


Asunto(s)
Curcumina , Nanopartículas del Metal , Corona de Proteínas , Humanos , Albúmina Sérica Humana , Oro/química , Espectroscopía Infrarroja por Transformada de Fourier , Curcuma , Nanopartículas del Metal/química , Dicroismo Circular , Termodinámica , Polifenoles , Unión Proteica , Espectrometría de Fluorescencia , Sitios de Unión
2.
Crit Rev Food Sci Nutr ; 63(32): 11010-11025, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-35703070

RESUMEN

Packaging ensures the safe handling and distribution of fresh and processed food products via diverse supply chains, and has become an indispensable component of the food industry. However, the rapidly expanding use of plastics, especially single-use plastics, as packaging material leads to inadequate waste management, littering, and consequently serious environmental damage, which predominantly affects marine and freshwater sources. Thus, the use of plastics for packaging purposes has become a major public concern and hence a concern among global policymakers. Notably, 26% of the total volume of global plastic production is primarily used for packaging, of which single-use plastics account for 50%, resulting in pollution that may last hundreds of years. This review provides an overview of the manner in which molded pulp products can be utilized to improve sustainability of food packaging applications, by highlighting the manufacturing processes, signifying characteristics features of recyclable molded pulp, and coupling circularity with eco-friendly and safe food product packaging. In this regard, current concepts advocate the implementation of a dynamic and sustainable approach using molded pulp products. This approach encompasses the design and production of eco-friendly packaging, distribution and consumption of packaged products, and collection and recycling of used packaging for subsequent reuse.


Asunto(s)
Plásticos , Reciclaje , Embalaje de Alimentos , Alimentos , Agua Dulce
3.
Inorg Chem ; 62(23): 8803-8811, 2023 Jun 12.
Artículo en Inglés | MEDLINE | ID: mdl-37249100

RESUMEN

The suitable choice of an electrocatalyst is crucial in controlling the selectivity of electrocatalytic CO2 reduction products. Herein, we have explored the effect of different ligand environments in 2D metal-organic frameworks (MOFs), viz., copper naphthalenedicarboxylate (Cu-UNDC) and copper benzenedicarboxylate (Cu-UBDC). The change of ligand modulates the structure of the MOFs as well as the electronic environment around the copper center. The variation in the electronic structure and the coordination environment of the active Cu center changes the selectivity toward C2 products. In the electrocatalytic process, Cu-UNDC produced 24.3% Faradaic efficiency (FE) for the C2 products─far better than that of Cu-UBDC (13.2%). In contrast to electrocatalytic CO2RR, in the presence of light, Cu-UBDC (26.2%) achieved a better FE for the C2 products than Cu-UNDC (21.8%).

4.
Inorg Chem ; 62(46): 18779-18788, 2023 Nov 20.
Artículo en Inglés | MEDLINE | ID: mdl-37933554

RESUMEN

A new class of antimony(III) corroles has been described. The photophysical properties of these newly synthesized tetrakis(thiocyano)corrolatoantimony(III) derivatives having four SCN groups on the bipyrrole unit of corrole are drastically altered compared to their ß-unsubstituted corrolatoantimony(III) analogues. The UV-vis and emission spectra of tetrakis(thiocyano)corrolatoantimony(III) derivatives are significantly red-shifted (roughly 30-40 nm) in comparison with their ß-unsubstituted corrolatoantimony(III) derivatives. The Q bands are significantly strengthened. The intensity of the most prominent Q band is roughly 70% that of the Soret band and absorbs strongly at the far-red region, i.e., at 700-720 nm. These molecules emit light in the near-infrared region (700-900 nm). Tetrakis(thiocyano)corrolatoantimony(III) undergoes electrochemical anodic oxidation to form SbV═O species, which facilitates electrocatalytic oxygen evolution reaction (OER) and the activation of benzylic C-H to produce benzoic acid selectively. Under optimized conditions, SbIII-corrole@NF (NF = nickel foam) required an overpotential of 380 mV to reach a 50 mA cm-2 current density, comparable with those of other transition-metal-based complexes. On the other hand, replacing the anodic OER with benzyl alcohol oxidation lowered the required potential by 150 mV (at 300 mA cm-2) to improve the energy efficiency of the electrochemical process.

5.
Sensors (Basel) ; 23(21)2023 Nov 06.
Artículo en Inglés | MEDLINE | ID: mdl-37960695

RESUMEN

In this paper, a low-cost resin-coated commercial-photo-paper substrate is used to design a printed reconfigurable multiband antenna. The two PIN diodes are used mainly to redistribute the surface current that provides reconfigurable properties to the proposed antenna. The antenna size of 40 mm × 40 mm × 0.44 mm with a partial ground, covers wireless and mobile bands ranging from 1.91 GHz to 6.75 GHz. The parametric analysis is performed to achieve optimized design parameters of the antenna. The U-shaped and C-shaped emitters are meant to function at 2.4 GHz and 5.9 GHz, respectively, while the primary emitter is designed to operate at 3.5 GHz. The proposed antenna achieved peak gain and radiation efficiency of 3.4 dBi and 90%, respectively. Simulated and measured results of the reflection coefficient, radiation pattern, gain, and efficiency show that the antenna design is in favorable agreement. Since the proposed antenna achieved wideband (1.91-6.75 GHz) using PIN diode configuration, using this technique the need for numerous electronic components to provide multiband frequency is avoided.

6.
Sensors (Basel) ; 23(20)2023 Oct 18.
Artículo en Inglés | MEDLINE | ID: mdl-37896656

RESUMEN

This article presents a quad-element MIMO antenna designed for multiband operation. The prototype of the design is fabricated and utilizes a vector network analyzer (VNA-AV3672D) to measure the S-parameters. The proposed antenna is capable of operating across three broad frequency bands: 3-15.5 GHz, encompassing the C band (4-8 GHz), X band (8-12.4 GHz), and a significant portion of the Ku band (12.4-15.5 GHz). Additionally, it covers two mm-wave bands, specifically 26.4-34.3 GHz and 36.1-48.9 GHz, which corresponds to 86% of the Ka-band (27-40 GHz). To enhance its performance, the design incorporates a partial ground plane and a top patch featuring a dual-sided reverse 3-stage stair and a straight stick symmetrically placed at the bottom. The introduction of a defected ground structure (DGS) on the ground plane serves to provide a wideband response. The DGS on the ground plane plays a crucial role in improving the electromagnetic interaction between the grounding surface and the top patch, contributing to the wideband characteristics of the antenna. The dimensions of the proposed MIMO antenna are 31.7 mm × 31.7 mm × 1.6 mm. Furthermore, the article delves into the assessment of various performance metrics related to antenna diversity, such as ECC, DG, TARC, MEG, CCL, and channel capacity, with corresponding values of 0.11, 8.87 dB, -6.6 dB, ±3 dB, 0.32 bits/sec/Hz, and 18.44 bits/sec/Hz, respectively. Additionally, the equivalent circuit analysis of the MIMO system is explored in the article. It's worth noting that the measured results exhibit a strong level of agreement with the simulated results, indicating the reliability of the proposed design. The MIMO antenna's ability to exhibit multiband response, good diversity performance, and consistent channel capacity across various frequency bands renders it highly suitable for integration into multi-band wireless devices. The developed MIMO system should be applicable on n77/n78/n79 5G NR (3.3-5 GHz); WLAN (4.9-5.725 GHz); Wi-Fi (5.15-5.85 GHz); LTE5537.5 (5.15-5.925 GHz); WiMAX (5.25-5.85 GHz); WLAN (5.725-5.875 GHz); long-distance radio telecommunication (4-8 GHz; C-band); satellite, radar, space communications and terrestrial broadband (8-12 GHz; X-band); and various satellite communications (27-40 GHz; Ka-band).

7.
Nucleic Acids Res ; 48(3): 1531-1550, 2020 02 20.
Artículo en Inglés | MEDLINE | ID: mdl-31807785

RESUMEN

FKBP53 is one of the seven multi-domain FK506-binding proteins present in Arabidopsis thaliana, and it is known to get targeted to the nucleus. It has a conserved PPIase domain at the C-terminus and a highly charged N-terminal stretch, which has been reported to bind to histone H3 and perform the function of a histone chaperone. To better understand the molecular details of this PPIase with histone chaperoning activity, we have solved the crystal structures of its terminal domains and functionally characterized them. The C-terminal domain showed strong PPIase activity, no role in histone chaperoning and revealed a monomeric five-beta palm-like fold that wrapped over a helix, typical of an FK506-binding domain. The N-terminal domain had a pentameric nucleoplasmin-fold; making this the first report of a plant nucleoplasmin structure. Further characterization revealed the N-terminal nucleoplasmin domain to interact with H2A/H2B and H3/H4 histone oligomers, individually, as well as simultaneously, suggesting two different binding sites for H2A/H2B and H3/H4. The pentameric domain assists nucleosome assembly and forms a discrete complex with pre-formed nucleosomes; wherein two pentamers bind to a nucleosome.


Asunto(s)
Proteínas de Arabidopsis/ultraestructura , Histonas/genética , Chaperonas Moleculares/ultraestructura , Nucleoplasminas/química , Proteínas de Unión a Tacrolimus/ultraestructura , Arabidopsis/química , Arabidopsis/genética , Proteínas de Arabidopsis/química , Proteínas de Arabidopsis/genética , Sitios de Unión/genética , Ensamble y Desensamble de Cromatina/genética , Cristalografía por Rayos X , Histonas/química , Chaperonas Moleculares/química , Chaperonas Moleculares/genética , Nucleoplasminas/genética , Nucleosomas/química , Nucleosomas/genética , Isomerasa de Peptidilprolil/genética , Unión Proteica/genética , Dominios Proteicos/genética , Pliegue de Proteína , Proteínas de Unión a Tacrolimus/química , Proteínas de Unión a Tacrolimus/genética
8.
Molecules ; 27(21)2022 Nov 03.
Artículo en Inglés | MEDLINE | ID: mdl-36364340

RESUMEN

In recent years, changing lifestyles and food consumption patterns have driven demands for high-quality, ready-to-eat food products that are fresh, clean, minimally processed, and have extended shelf lives. This demand sparked research into the creation of novel tools and ingredients for modern packaging systems. The use of phenolic-compound-based active-packaging and edible films/coatings with antimicrobial and antioxidant activities is an innovative approach that has gained widespread attention worldwide. As phenolic compounds are natural bioactive molecules that are present in a wide range of foods, such as fruits, vegetables, herbs, oils, spices, tea, chocolate, and wine, as well as agricultural waste and industrial byproducts, their utilization in the development of packaging materials can lead to improvements in the oxidative status and antimicrobial properties of food products. This paper reviews recent trends in the use of phenolic compounds as potential ingredients in food packaging, particularly for the development of phenolic compounds-based active packaging and edible films. Moreover, the applications and modes-of-action of phenolic compounds as well as their advantages, limitations, and challenges are discussed to highlight their novelty and efficacy in enhancing the quality and shelf life of food products.


Asunto(s)
Antiinfecciosos , Películas Comestibles , Conservación de Alimentos , Embalaje de Alimentos , Verduras , Antiinfecciosos/farmacología , Fenoles , Antibacterianos
9.
Adv Exp Med Biol ; 1345: 165-191, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34582023

RESUMEN

Biomaterials science encompasses elements of medicine, biology, chemistry, materials, and tissue engineering. They are engineered to interact with biological systems to treat, augment, repair, or replace lost tissue function. The choice of biomaterial depends on the procedure being performed, the severity of the patient's condition, and the surgeon's preference. Prostheses made from natural-derived biomaterials are often derived from decellularized extracellular matrix (ECM) of animal (xenograft) or human (allograft) origin. Advantages of using ECM include their resemblance in morphology and three-dimensional structures with that of tissue to be replaced. Due to this, scientists all over are now focusing on naturally derived biomaterials which have been shown to possess several advantages compared to synthetic ones, owing to their biocompatibility, biodegradability, and remodeling properties. Advantages of a naturally derived biomaterial enhance their application for replacement or restoration of damaged organs/tissues. They adequately support cell adhesion, migration, proliferation, and differentiation. Naturally derived biomaterials can induce extracellular matrix formation and tissue repair when implanted into a defect by enhancing attachment and migration of cells from surrounding environment. In the current chapter, we will focus on the natural and synthetic dermal matrix development and all of the progress in this field.


Asunto(s)
Ingeniería de Tejidos , Andamios del Tejido , Animales , Materiales Biocompatibles , Adhesión Celular , Matriz Extracelular , Humanos
10.
Prz Menopauzalny ; 19(2): 101-103, 2020 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-32802020

RESUMEN

Postmenopause is a phase of life which leads physical and emotional instability from multiple health related issues. Oral health in this stage of life is also compromised. Oral health has an impact on general wellbeing of the individual as oral cavity is commonly act as a mirror to general health. Menopause is phase in a woman's life when menstrual cycles cease by reduced secretion of the ovarian hormones, such as estrogen and progesterone. This review article has emphasized on the diverse oral presentations of peri- and postmenopausal phase of women's life. Practicing dental surgeons and general physician should be aware of the possible association of postmenopause and its various oral signs and symptoms in this midlife phase of women. It also focuses on its symptomatic management of various oral health issues. This article explains diverse oral conditions in detailed and their management. Stress causing anxiety and depression among this midlife phase of women can lead to alteration in immunity which can again lead to various oral conditions, like lichen planus, apthous ulcer that can cause burning sensation in oral mucosa and alter the food habit. By dealing with all this diverse condition, practicing oral physician can help to reduce and manage oral manifestation of postmenopausal phase of life.

11.
J Indian Assoc Pediatr Surg ; 20(1): 37-9, 2015 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-25552830

RESUMEN

A common upper airway and digestive tract is a rare congenital anomaly that is usually fatal and its exact incidence is not known. It is a diagnostic challenge as it requires high index of suspicion. It should be considered in a neonate with respiratory distress in a non-vigorous baby requiring endotracheal intubation, which is difficult even in expert hand. We present a newborn with suspected tracheo-esophageal fistula that was diagnosed intraoperatively to have absent upper blind pouch of the esophagus and on autopsy found to have laryngeal atresia with absent vocal cords and a common aerodigestive tract continuing distally with trachea. The neonate was ventilated with endotracheal tube (ETT) placement which in retrospect we came to know that it was in the esophagus. The neonate also had associated multiple congenital anomalies of VACTERL association. The importance of teamwork between neonatologist, pediatric surgeon, anesthesiologist, and radiologist is highlighted for diagnosis and management of such rare cases.

12.
Dalton Trans ; 53(4): 1746-1756, 2024 Jan 23.
Artículo en Inglés | MEDLINE | ID: mdl-38168794

RESUMEN

The article deals with the development of isomeric ruthenium(II)-hydrido complexes [RuII(H)(L1)(PPh3)2(CO)]ClO4 ([1a]ClO4-[1b]ClO4)/[RuII(H)(L2)(PPh3)2(CO)]ClO4 ([2a]ClO4-[2b]ClO4) involving azo coupled L1 [L1: (E)-1,2-bis(1-methyl-1H-pyrazol-3-yl)diazene]/L2 [L2: (E)-1,2-bis(4-iodo-1-methyl-1H-pyrazol-3-yl)diazene], respectively. Structural evaluation of the complexes affirmed the syn conformation of the coordinated/uncoordinated pyrazole groups of L and its unperturbed neutral azo (NN) state. Isomeric forms in [1a]ClO4/[1b]ClO4 or [2a]ClO4/[2b]ClO4 differed with respect to the cis and trans orientations of the coordinated CO and N(azo) donor of L, respectively. It also demonstrated the formation of intermolecular hydrogen-bonded dimeric or 1D-polymeric chains in [1a]ClO4/[2b]ClO4 or [1b]ClO4, respectively. Successive two-electron reductions of the complexes varied to an appreciable extent as a function of the heterocycles connected to L. The involvement of the azo function of L towards the reductions ([NN]0 → [NN]˙- → [NN]2-) was supported by the DFT calculated MOs and Mulliken spin density at the paramagnetic state, which was further validated by the radical EPR profile of the first reduced (S = 1/2) state. Isomeric [1a]ClO4/[1b]ClO4 or [2a]ClO4/[2b]ClO4 immobilised on the carbon cloth support underwent various electrochemical acidic HERs (hydrogen evolution reactions) with TOF/10-1 s-1: [1a]ClO4 (0.83) > [1b]ClO4 (0.68) > [2a]ClO4 (0.50) > [2b]ClO4 (0.37).

13.
Gels ; 9(6)2023 May 24.
Artículo en Inglés | MEDLINE | ID: mdl-37367104

RESUMEN

Leveraging sustainable packaging resources in the circular economy framework has gained significant attention in recent years as a means of minimizing waste and mitigating the negative environmental impact of packaging materials. In line with this progression, bio-based hydrogels are being explored for their potential application in a variety of fields including food packaging. Hydrogels are three-dimensional, hydrophilic networks composed of a variety of polymeric materials linked by chemical (covalent bonds) or physical (non-covalent interactions) cross-linking. The unique hydrophilic nature of hydrogels provides a promising solution for food packaging systems, specifically in regulating moisture levels and serving as carriers for bioactive substances, which can greatly affect the shelf life of food products. In essence, the synthesis of cellulose-based hydrogels (CBHs) from cellulose and its derivatives has resulted in hydrogels with several appealing features such as flexibility, water absorption, swelling capacity, biocompatibility, biodegradability, stimuli sensitivity, and cost-effectiveness. Therefore, this review provides an overview of the most recent trends and applications of CBHs in the food packaging sector including CBH sources, processing methods, and crosslinking methods for developing hydrogels through physical, chemical, and polymerization. Finally, the recent advancements in CBHs, which are being utilized as hydrogel films, coatings, and indicators for food packaging applications, are discussed in detail. These developments have great potential in creating sustainable packaging systems.

14.
Chem Commun (Camb) ; 59(40): 6084-6087, 2023 May 16.
Artículo en Inglés | MEDLINE | ID: mdl-37128969

RESUMEN

Herein, we demonstrate a facile method for the introduction of nitrogen in the lattices of nickel nanoparticles to form NiNx (x = 0.13, 0.20, 0.27). X-ray absorption spectroscopy reveals the contraction of the Ni-Ni bond and modulated coordination environment after nitrogen introduction. The NiN0.20 required 87 mV overpotential for -10 mA cm-2 cathodic current density in simulated seawater. The density functional theory calculations revealed favorable EH2Oads and ΔGHads after N-introduction.

15.
Biochim Biophys Acta Gene Regul Mech ; 1865(7): 194872, 2022 10.
Artículo en Inglés | MEDLINE | ID: mdl-36058470

RESUMEN

The nucleoplasmin family of histone chaperones is a key player in governing the dynamic architecture of chromatin, thereby regulating various DNA-templated processes. The crystal structure of the N-terminal domain of Arabidopsis thaliana FKBP43 (AtFKBP43), an FK506-binding immunophilin protein, revealed a characteristic nucleoplasmin fold, thus confirming it to be a member of the FKBP nucleoplasmin class. Small-Angle X-ray Scattering (SAXS) analyses confirmed its pentameric nature in solution, and additional studies confirmed the nucleoplasmin fold to be highly stable. Unlike its homolog AtFKBP53, the AtFKBP43 nucleoplasmin core domain could not interact with histones and required the acidic arms, C-terminal to the core, for histone association. However, SAXS generated low-resolution envelope structure, ITC, and AUC results revealed that an AtFKBP43 pentamer with C-terminal extensions interacts with H2A/H2B dimer and H3/H4 tetramer in an equimolar ratio, like AtFKBP53. Put together, AtFKBP43 belongs to a hitherto unreported subclass of FKBP nucleoplasmins that requires the C-terminal acidic stretches emanating from the core domain for histone interaction.


Asunto(s)
Arabidopsis , Histonas , Arabidopsis/genética , Cromatina/metabolismo , ADN/metabolismo , Chaperonas de Histonas/química , Chaperonas de Histonas/metabolismo , Histonas/metabolismo , Nucleoplasminas/metabolismo , Dispersión del Ángulo Pequeño , Tacrolimus/metabolismo , Proteínas de Unión a Tacrolimus/química , Proteínas de Unión a Tacrolimus/genética , Proteínas de Unión a Tacrolimus/metabolismo , Difracción de Rayos X
16.
Int J Biol Macromol ; 206: 670-680, 2022 May 01.
Artículo en Inglés | MEDLINE | ID: mdl-35218805

RESUMEN

Chemically induced dimerization (CID) is used to induce proximity and result in artificial complex formation between a pair of proteins involved in biological processes in cells to investigate and regulate these processes. The induced heterodimerization of FKBP fusion proteins by rapamycin and FK506 has been extensively exploited as a chemically induced dimerization system to regulate and understand highly dynamic cellular processes. Here, we report the crystal structure of the AtFKBP53 FKBD in complex with rapamycin. The crystal packing reveals an unusual feature whereby two rapamycin molecules appear to mediate homodimerization of the FKBD. The triene arm of rapamycin appears to play a significant role in forming this dimer. This forms the first structural report of rapamycin-mediated homodimerization of an FKBP. The structural information on the rapamycin-mediated FKBD dimerization may be employed to design and synthesize covalently linked dimeric rapamycin, which may subsequently serve as a chemically induced dimerization system for the regulation and characterization of cellular processes.


Asunto(s)
Sirolimus , Tacrolimus , Dimerización , Sirolimus/farmacología , Tacrolimus/farmacología , Proteínas de Unión a Tacrolimus/química
17.
Int J Biol Macromol ; 223(Pt A): 316-326, 2022 Dec 31.
Artículo en Inglés | MEDLINE | ID: mdl-36328269

RESUMEN

Plasmodium falciparum requires a two-host system, moving between Anopheles mosquito and humans, to complete its life cycle. To overcome such dynamic growth conditions its histones undergo various post-translational modifications to regulate gene expression. The P. falciparum Bromodomain Protein 1 (PfBDP1) has been shown to interact with acetylated lysine modifications on histone H3 to regulate the expression of invasion-related genes. Here, we investigated the ability of the PfBDP1 bromodomain to interact with acetyllsyine modifications on additional core and variant histones. A crystal structure of the PfBDP1 bromodomain (PfBDP1-BRD) reveals it contains the conserved bromodomain fold, but our comparative analysis between the PfBDP1-BRD and human bromodomain families indicates it has a unique binding mechanism. Solution NMR spectroscopy and ITC binding assays carried out with acetylated histone ligands demonstrate that it preferentially recognizes tetra-acetylated histone H4, and we detected weaker interactions with multi-acetylated H2A.Z in addition to the previously reported interactions with acetylated histone H3. Our findings indicate PfBDP1 may play additional roles in the P. falciparum life cycle, and the distinctive features of its bromodomain binding pocket could be leveraged for the development of new therapeutic agents to help overcome the continuously evolving resistance of P. falciparum against currently available drugs.


Asunto(s)
Histonas , Plasmodium falciparum , Humanos , Histonas/metabolismo , Ligandos , Plasmodium falciparum/metabolismo , Unión Proteica , Dominios Proteicos , Acetilación , Factor de Transcripción TFIIIB/metabolismo
18.
Indian J Community Med ; 46(1): 137-140, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34035595

RESUMEN

BACKGROUND AND OBJECTIVES: Stress is an indispensable part of modern-day living. The study deals with coping strategies by the participants and their perception toward drugs, electronic gadgets, and media as stress creators, busters, or relievers. MATERIALS AND METHODS: A cross-sectional study was conducted among 400 community dwellers in a suburban area of Delhi. A structured questionnaire with Likert scale was used to assess coping strategies to stress and perception of use of electronic gadgets, media, and substance abuse as stress creators, busters, and relievers. RESULTS: For coping strategies, 52.8% (95% confidence interval: 47.73-57.73) of the participants wanted to discuss problems with their families, but others considered mobile phones (51.5%, 46.48, 56.50), television (70.5%, 65.77, 74.93), and social networking sites (33.5%, 28.89, 38.36) to be their stress busters than creators. An age-associated statistically significant difference in perception about stress creator and buster scores between younger versus older was observed (P = 0.000), whereas gender-wise males perceived substance abuse to be a stress reliever in contrast to females (P = 0.000). CONCLUSION: Family plays an important role in the mitigation of stress. However, excess reliance on social media by younger people and substance abuse by males in stressful situations need to be addressed adequately.

19.
J Family Med Prim Care ; 9(4): 2002-2005, 2020 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-32670955

RESUMEN

AIM: The present study aimed at analysing the probable effects of full mouth oral rehabilitation on bite forces at their maximum extent in young paediatric patients with primary as well as mixed dentitions. METHODOLOGY: The present study is one of a kind and explores the maximum bite forces in young children. A statistically significant number of children (n = 30) with a mean age of 6.54 years. About 44.75% were boys and 55.25% were girls. The maximum voluntary bite force was assessed for each participant immediately before treatment and 1 month (3-5 weeks) following completion of the needful dental treatment. The difference in bite force magnitude before and after dental treatment was analysed statistically. In addition, the correlations of key variables including, age, height, weight, BMI, gender and caries severity or dental status with maximum bite force were statistically analysed. RESULTS: The mean maximum bite force for the total sample (n = 30) prior to treatment was found to be 167.83 N (SD = 65.20). The mean bite force in the male subgroup was 175.39 N (SD = 64.69) while for the females the mean bite force was equal to 166.29 N (SD = 68.93). Following comprehensive dental treatment, the recorded mean maximum bite force for the children (n = 30) who attended the post-treatment review appointment was 182.60 N (SD = 68.58). CONCLUSION: The essential factors such as the extent of dental caries, their severity, presence of clinical signs and symptoms has a negative impact on maximum bite force.

20.
J Family Med Prim Care ; 9(10): 5127-5131, 2020 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-33409175

RESUMEN

Maintaining a patient's quality of life is main the aim while treating cancer patients. Patients getting treated for oral cancer encountered with numerous symptoms at the time of radiotherapy and most of these are side effect which can persist even after few months to year after the treatment gets over. Radiotherapy is a vital aspect of both curative and palliative cancer care. Understanding the basics complications of radiotherapy along with its primary management of oral symptoms can assist family physicians in providing complete primary care for their cancer patients. Palliative oral care helps to ease symptoms from the cancer treatment. Oral care negligence is still a major cause of worsening of posttreatment quality of life of an individual. The article mainly empathies on the oral health care need to be taken care by primary care physicians in the cancer patients during and after the radiotherapy. Consequences associated with radiotherapy in oral cavity and its systematic overview of preventing and managing acute and chronic condition. It enlightens the importance of dentist role on improving quality of life of these patients.

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