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1.
J Phys Chem Lett ; 15(11): 3078-3088, 2024 Mar 21.
Artigo em Inglês | MEDLINE | ID: mdl-38467015

RESUMO

A biomimetic cell-based carrier system based on monocyte membranes and liposomes has been designed to create a hybrid "Monocyte-LP" which inherits the surface antigens of the monocytes along with the drug encapsulation property of the liposome. Förster resonance energy transfer (FRET) and polarization gated anisotropy measurements show the stiffness of the vesicles obtained from monocyte membranes (Mons), phosphatidylcholine membranes (LP), and Monocyte-LP to follow an increasing order of Mons > Monocyte-LP > LP. The dynamics of interface bound water molecules plays a key role in the elasticity of the vesicles, which in turn imparts higher delivery efficacy to the hybrid Monocyte-LP for a model anticancer drug doxorubicin than the other two vesicles, indicating a critical balance between flexibility and rigidity for an efficient cellular uptake. The present work provides insight on the influence of elasticity of delivery vehicles for enhanced drug delivery.


Assuntos
Antineoplásicos , Lipossomos , Lipossomos/metabolismo , Monócitos/metabolismo , Doxorrubicina , Sistemas de Liberação de Medicamentos
2.
J Biomed Mater Res A ; 2024 Mar 28.
Artigo em Inglês | MEDLINE | ID: mdl-38545912

RESUMO

In the study, we have shown the efficacy of an indigenously developed redox balancing chitosan gel with impregnated citrate capped Mn3O4 nanoparticles (nanogel). Application of the nanogel on a wound of preclinical mice model shows role of various signaling molecules and growth factors, and involvement of reactive oxygen species (ROS) at every stage, namely hemostasis, inflammation, and proliferation leading to complete maturation for the scarless wound healing. While in vitro characterization of nanogel using SEM, EDAX, and optical spectroscopy reveals pH regulated redox buffering capacity, in vivo preclinical studies on Swiss albino involving IL-12, IFN-γ, and α-SMA signaling molecules and detailed histopathological investigation and angiogenesis on every stage elucidate role of redox buffering for the complete wound healing process.

3.
Sci Rep ; 13(1): 17306, 2023 10 12.
Artigo em Inglês | MEDLINE | ID: mdl-37828100

RESUMO

The recent prediction of diabetes to be a global pandemic invites a detection strategy preferably non-invasive, and bloodless to manage the disease and the associated complications. Here, we have synthesized chitosan polymer functionalized, organic-inorganic bio-compatible nano-hybrids of Mn3O4 nanoparticles, and characterized it by utilizing several optical methodologies for the structural characterization which shows the Michaelis Menten (MM) kinetics for glucose and alpha-amylase protein (well-known diabetes biomarkers). We have also studied the potentiality for the detection of alpha-amylase in human salivary secretion which is reported to be strongly correlated with uncontrolled hyperglycemia. Finally, we have developed a prototype for the measurement of glucose (LOD of 0.38 mg/dL, LOQ of 1.15 mg/dL) and HbA1c (LOD of 0.15% and LOQ of 0.45%) utilizing the basic knowledge in the study for the detection of uncontrolled hyperglycemia at the point-of-care. With the limited number of clinical trials, we have explored the potential of our work in combating the diabetic pandemic across the globe in near future.


Assuntos
Diabetes Mellitus , Hiperglicemia , Humanos , Saliva/metabolismo , Diabetes Mellitus/diagnóstico , Diabetes Mellitus/metabolismo , Glucose/metabolismo , Hiperglicemia/diagnóstico , Hiperglicemia/metabolismo , Análise Espectral , alfa-Amilases/metabolismo
4.
Commun Biol ; 6(1): 647, 2023 06 16.
Artigo em Inglês | MEDLINE | ID: mdl-37328528

RESUMO

Recent findings suggest a key role for reactive oxygen species (ROS) in the pathogenesis and progression of ulcerative colitis (UC). Several studies have also highlighted the efficacy of citrate functionalized Mn3O4 nanoparticles as redox medicine against a number of ROS-mediated disorders. Here we show that synthesized nanoparticles consisting of chitosan functionalized tri-manganese tetroxide (Mn3O4) can restore redox balance in a mouse model of UC induced by dextran sulfate sodium (DSS). Our in-vitro characterization of the developed nanoparticle confirms critical electronic transitions in the nanoparticle to be important for the redox buffering activity in the animal model. A careful administration of the developed nanoparticle not only reduces inflammatory markers in the animals, but also reduces the mortality rate from the induced disease. This study provides a proof of concept for the use of nanomaterial with synergistic anti-inflammatory and redox buffering capacity to prevent and treat ulcerative colitis.


Assuntos
Quitosana , Colite Ulcerativa , Nanopartículas , Animais , Camundongos , Colite Ulcerativa/induzido quimicamente , Colite Ulcerativa/tratamento farmacológico , Quitosana/efeitos adversos , Espécies Reativas de Oxigênio , Oxirredução
5.
Spectrochim Acta A Mol Biomol Spectrosc ; 299: 122842, 2023 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-37216816

RESUMO

Even in the era of smart technologies and IoT enabled devices, tea testing technique continues to be a person specific subjective task. In this study, we have employed optical spectroscopy-based detection technique for the quantitative validation of tea quality. In this regard, we have employed the external quantum yield of quercetin at 450 nm (λex = 360 nm), which is an enzymatic product generated by the activity of ß-glucosidase on rutin, a naturally occurring metabolite responsible for tea-flavour (quality). We have found that a specific point in a graph representing Optical Density and external Quantum Yield as independent and dependent variables respectively of an aqueous tea extract objectively indicates a specific variety of the tea. A variety of tea samples from various geographical origin have been analysed with the developed technique and found to be useful for the tea quality assessment. The principal component analysis distinctly showed the tea samples originated from Nepal and Darjeeling having similar external quantum yield, while the tea samples from Assam region had a lower external quantum yield. Furthermore, we have employed experimental and computational biology techniques for the detection of adulteration and health benefit of the tea extracts. In order to assure the portability/field use, we have also developed a prototype which confirms the results obtained in the laboratory. We are of the opinion that the simple user interface and almost zero maintenance cost of the device will make it useful and attractive with minimally trained manpower at low resource setting.


Assuntos
Camellia sinensis , Chá , Humanos , Chá/química , Análise Espectral , Quercetina , Extratos Vegetais , Biomarcadores , Camellia sinensis/química
6.
Sci Rep ; 13(1): 2370, 2023 02 09.
Artigo em Inglês | MEDLINE | ID: mdl-36759533

RESUMO

The study was aimed to evaluate the performance of a newly developed spectroscopy-based non-invasive and noncontact device (SAMIRA) for the simultaneous measurement of hemoglobin, bilirubin and oxygen saturation as an alternative to the invasive biochemical method of blood sampling. The accuracy of the device was assessed in 4318 neonates having incidences of either anemia, jaundice, or hypoxia. Transcutaneous bilirubin, hemoglobin and blood saturation values were obtained by the newly developed instrument which was corroborated with the biochemical blood tests by expert clinicians. The instrument is trained using Artificial Neural Network Analysis to increase the acceptability of the data. The artificial intelligence incorporated within the instrument determines the disease condition of the neonate. The Pearson's correlation coefficient, r was found to be 0.987 for hemoglobin estimation and 0.988 for bilirubin and blood gas saturation respectively. The bias and the limits of agreement for the measurement of all the three parameters were within the clinically acceptance limit.


Assuntos
Bilirrubina , Hemoglobinas , Saturação de Oxigênio , Oxigênio , Sistemas Automatizados de Assistência Junto ao Leito , Análise Espectral , Humanos , Recém-Nascido , Inteligência Artificial , Bilirrubina/sangue , Hemoglobinas/análise , Oxigênio/sangue , Análise Espectral/instrumentação , Análise Espectral/métodos , Imagem Óptica/instrumentação , Imagem Óptica/métodos
7.
Pediatr Res ; 93(4): 827-837, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-35794251

RESUMO

BACKGROUND: Targeted rapid degradation of bilirubin has the potential to thwart incipient bilirubin encephalopathy. We investigated a novel spinel-structured citrate-functionalized trimanganese tetroxide nanoparticle (C-Mn3O4 NP, the nanodrug) to degrade both systemic and neural bilirubin loads. METHOD: Severe neonatal unconjugated hyperbilirubinemia (SNH) was induced in neonatal C57BL/6j mice model with phenylhydrazine (PHz) intoxication. Efficiency of the nanodrug on both in vivo bilirubin degradation and amelioration of bilirubin encephalopathy and associated neurobehavioral sequelae were evaluated. RESULTS: Single oral dose (0.25 mg kg-1 bodyweight) of the nanodrug reduced both total serum bilirubin (TSB) and unconjugated bilirubin (UCB) in SNH rodents. Significant (p < 0.0001) UCB and TSB-degradation rates were reported within 4-8 h at 1.84 ± 0.26 and 2.19 ± 0.31 mg dL-1 h-1, respectively. Neural bilirubin load was decreased by 5.6 nmol g-1 (p = 0.0002) along with improved measures of neurobehavior, neuromotor movements, learning, and memory. Histopathological studies confirm that the nanodrug prevented neural cell reduction in Purkinje and substantia nigra regions, eosinophilic neurons, spongiosis, and cell shrinkage in SNH brain parenchyma. Brain oxidative status was maintained in nanodrug-treated SNH cohort. Pharmacokinetic data corroborated the bilirubin degradation rate with plasma nanodrug concentrations. CONCLUSION: This study demonstrates the in vivo capacity of this novel nanodrug to reduce systemic and neural bilirubin load and reverse bilirubin-induced neurotoxicity. Further compilation of a drug-safety-dossier is warranted to translate this novel therapeutic chemopreventive approach to clinical settings. IMPACT: None of the current pharmacotherapeutics treat severe neonatal hyperbilirubinemia (SNH) to prevent risks of neurotoxicity. In this preclinical study, a newly investigated nano-formulation, citrate-functionalized Mn3O4 nanoparticles (C-Mn3O4 NPs), exhibits bilirubin reduction properties in rodents. Chemopreventive properties of this nano-formulation demonstrate an efficacious, efficient agent that appears to be safe in these early studies. Translation of C-Mn3O4 NPs to prospective preclinical and clinical trials in appropriate in vivo models should be explored as a potential novel pharmacotherapy for SNH.


Assuntos
Hiperbilirrubinemia Neonatal , Kernicterus , Compostos de Manganês , Animais , Camundongos , Bilirrubina , Quimioprevenção , Hiperbilirrubinemia Neonatal/prevenção & controle , Kernicterus/prevenção & controle , Camundongos Endogâmicos C57BL , Estudos Prospectivos , Animais Recém-Nascidos , Modelos Animais de Doenças , Compostos de Manganês/administração & dosagem , Nanopartículas/administração & dosagem
8.
Biosens Bioelectron ; 218: 114764, 2022 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-36206669

RESUMO

Urinary bladder cancer (UBC) is one of the most common cancers and has notoriously high risk of recurrence and mortality across the globe. Current clinical initial diagnostic approaches are either invasive or lacks sensitivity. In this study, an attempt has been made to invent a cost-effective, novel, portable diagnostic device based on the environmental sensitive fluorophores namely Nile Red (NR), Eosin Y (EY) and Rose Bengal (RB). They act as sensing agents for detecting volatile organic compounds (VOC) exclusively present in the urine sample of UBC patients and differentiate the UBC samples from the healthy control group. Upon exposure with a particular group of VOCs, a significant amount of increment in fluorescence intensities of NR, EY and RB were detected and recorded in our indigenously developed "NABIL" device. To check the performance of NABIL, the data collected from the device was compared with the conventional techniques by arranging a clinical trial with 21 healthy controls and 52 UBC patients. With the assistance of our analysis technique based on LabVIEW platform, very high sensitivity and accuracy from healthy controls have been achieved. For UBC patients, it shows impressive diagnostic results. In addition, depending on the sample processing mechanism, NABIL device can also reveal the grade of UBC and prognosis under treatment. Overall, this study contributes a novel, non-invasive, easy-to-use, inexpensive, real-time, accurate method for selectively UBC diagnosis, which can be useful for personalized care/diagnosis and postoperative surveillance, resulting in saving more lives.


Assuntos
Técnicas Biossensoriais , Neoplasias da Bexiga Urinária , Compostos Orgânicos Voláteis , Humanos , Biomarcadores , Biomarcadores Tumorais/urina , Amarelo de Eosina-(YS) , Rosa Bengala , Neoplasias da Bexiga Urinária/diagnóstico , Neoplasias da Bexiga Urinária/urina
9.
iScience ; 25(9): 105021, 2022 Sep 16.
Artigo em Inglês | MEDLINE | ID: mdl-36111254

RESUMO

The usual treatment for anemia and especially for anemia of inflammation (also called anemia of chronic disease) is supportive care with the target of improving the lifestyle of the patients. There is no effective medication to date for proper management. As the inflammation, erythropoiesis, and oxidative stress are the major concerns in this case, it inspired us to use a nano-erythropoietin stimulating agent (nano-ESA) made up of a nano-complex of manganese and citrate (Mn-citrate nano-complex), which has been hypothesized to have excellent antioxidant and anti-inflammatory mechanisms. Single oral dose of the nano-ESA efficiently prevented the onset of anemia as well as led to recovery from anemia in our phenylhydrazine (PHz)-intoxicated C57BL/6J mice model of anemia without any toxicological side effects. These preliminary findings may pave the way for an affordable and safe clinical use of the nano-ESA as a rapid recovery medication of anemia, especially anemia of inflammation.

10.
Rev Sci Instrum ; 93(5): 054101, 2022 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-35649790

RESUMO

We developed an integrated device composed of a single-probe Electroencephalogram (EEG) and Charge Coupled Device (CCD) based motion sensors for objective measurement of Attention-deficit Hyperactivity Disorder (ADHD). While the measurement of attention-deficit hyperactivity disorder (MAHD) relies on the EEG signal for the assessment of attention during a given structured task, the CCD sensor depicts the movement pattern of the subjects engaged in a continuous performance task. A statistical analysis of attention and movement patterns was performed, and the accuracy of completed tasks was analyzed using indigenously developed software. The device with the embedded software is intended to improve certainty with criterion E. We used the EEG signal from a single-channel dry sensor placed on the frontal lobe of the head of the subjects (3-5 year old pre-schoolers). During the performance of the task power for delta and beta, EEG waves from the subjects are found to be correlated with relaxation and attention/cognitive load conditions. While the relaxation condition of the subject hints at hyperactivity, a more direct CCD-based motion sensor is used to track the physical movement of the subject engaged in a continuous performance task. We used our indigenously developed software for statistical analysis to derive a scale for the objective assessment of ADHD. We also compared our scale with clinical ADHD evaluations and found a significant correlation between the objective assessment of the ADHD subjects and the clinician's conventional evaluation. MAHD, the integrated device, is supposed to be an auxiliary tool to improve the accuracy of ADHD diagnosis by supporting greater criterion E certainty.


Assuntos
Transtorno do Deficit de Atenção com Hiperatividade , Transtorno do Deficit de Atenção com Hiperatividade/diagnóstico , Transtorno do Deficit de Atenção com Hiperatividade/psicologia , Pré-Escolar , Eletroencefalografia , Humanos
11.
BMJ Open Qual ; 11(Suppl 1)2022 05.
Artigo em Inglês | MEDLINE | ID: mdl-35545275

RESUMO

BACKGROUND: Medication errors are an emerging problem in various hospital settings, especially in neonates. A study conducted in the neonatal care unit of a tertiary institute in Kolkata as baseline over 3 months, revealed total error to be around 71.1/100 prescriptions (median medication error percentage: 63%). PURPOSE: To assess the occurrences of medication errors and determine efficacy of Point-of-Care Quality improvement (POCQI) model in reducing the same from baseline 63% to less than 10%, in the above setting within next 9 months. MATERIALS AND METHODS: This quality improvement initiative of quasi-experimental design comprised randomly selected prescriptions and monitoring sheets of neonates admitted in the neonatal care unit, obeying inclusion and exclusion criteria. Medication errors were assessed and categorised using a predesigned and pretested checklist. Interventions were planned after forming a quality improvement team in four plan-do-study-act (PDSA) cycles spanning over 6 weeks each (including training of doctors and nurses, signature and countersignatures of respective healthcare personnel, computer-generated prescriptions and newly designed software-generated prescriptions) as per POCQI model of the WHO and results in post-intervention phase (3 months) were compared. RESULTS: A total of 552 prescriptions and monitoring sheets of 124 neonates were studied. Median medication error percentages in first, second, third and fourth PDSA cycle were, respectively, 48%, 42%, 30% and 14%. Total error reduced to 10.4/100 prescriptions (p<0.005), with significant reduction in erred dosage, timing, interval, preparation and rate of infusion of drugs in prescriptions of the post-intervention phase. CONCLUSION: Implementation of change ideas via PDSA cycles, as per the POCQI model with technological aid, significantly decreased the percentage of medication errors in neonates, which was also sustained in the post-intervention phase and facilitated error-free prescriptions.


Assuntos
Unidades de Terapia Intensiva Neonatal , Melhoria de Qualidade , Humanos , Recém-Nascido , Erros de Medicação/prevenção & controle , Sistemas Automatizados de Assistência Junto ao Leito , Centros de Atenção Terciária
12.
Phys Chem Chem Phys ; 24(10): 6176-6184, 2022 Mar 09.
Artigo em Inglês | MEDLINE | ID: mdl-35229087

RESUMO

The potentiality of Förster resonance energy transfer (FRET) for studying molecular interactions inside biological tissues with improved spatial (Angström) and temporal (picosecond) resolution is well established. On the other hand, the efficacy of diffuse reflectance spectroscopy (DRS) that uses optical radiation in order to determine physiological parameters including haemoglobin, and oxygen saturation is well known. Here we have made an attempt to combine diffuse reflectance spectroscopy (DRS) with picosecond-resolved FRET in order to show improvement in the exploration of molecular contacts in biological tissue models. We define the technique as ultrafast time-resolved diffuse reflectance spectroscopy (UTRDRS). The illuminated photon of the fluorophore from the surface of the tissue-mimicking layers carries the hidden information of the molecular contact. In order to investigate the validation of the Kubelka-Munk (KM) formulism for the developed UTRDRS technique in tissue phantoms, we have studied the propagation of incandescent and picosecond-laser light through several layers of cellulose membranes. While picosecond-resolved FRET in the diffuse reflected light confirms the hidden nano-contact (4.6 nm) of two different dye layers (8-anilino-1-naphthalenesulfonic acid and Nile blue), high-resolution optical microscopy on the cross-section of the layers reveals the proximity and contacts of the layers with limited spatial resolution (∼300 nm). We have also investigated two biologically relevant molecules, namely carboxyfluorescein and haemoglobin, in tissue phantom layers in order to show the efficacy of the UTRDRS technique. Overall, our studies based on UTRDRS in tissue mimicking layers may have potential applications in non-invasive biomedical diagnosis for patients suffering from skin diseases.


Assuntos
Transferência Ressonante de Energia de Fluorescência , Luz , Transferência Ressonante de Energia de Fluorescência/métodos , Corantes Fluorescentes , Hemoglobinas , Humanos , Análise Espectral
13.
Chembiochem ; 23(9): e202200109, 2022 05 04.
Artigo em Inglês | MEDLINE | ID: mdl-35225409

RESUMO

Drug delivery to a target without adverse effects is one of the major criteria for clinical use. Herein, we have made an attempt to explore the delivery efficacy of SDS surfactant in a monomer and micellar stage during the delivery of the model drug, Toluidine Blue (TB) from the micellar cavity to DNA. Molecular recognition of pre-micellar SDS encapsulated TB with DNA occurs at a rate constant of k1 ∼652 s-1 . However, no significant release of encapsulated TB at micellar concentration was observed within the experimental time frame. This originated from the higher binding affinity of TB towards the nano-cavity of SDS at micellar concentration which does not allow the delivery of TB from the nano-cavity of SDS micelles to DNA. Thus, molecular recognition controls the extent of DNA recognition by TB which in turn modulates the rate of delivery of TB from SDS in a concentration-dependent manner.


Assuntos
DNA , Micelas , Genômica , Análise Espectral , Tensoativos
14.
Hemoglobin ; 45(5): 296-302, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34758688

RESUMO

Deferiprone (DFP) and deferasirox (DFX) are the most well-known, efficacious and safe chelators to reduce the serum ferritin (SF) level in multi transfused thalassemic children, although there are few reports available for assessing the efficacy between DFP and DFX. We compared the efficacy of DFP vs. DFX as iron chelating drugs in ß-thalassemia major (ß-TM) patients. Pediatric patients diagnosed to carry ß-TM, aged between 2 and 10 years, were recruited. A suitable data collection form and questionnaire were used. Paired and unpaired t-tests were used to compare the safety and efficacy of the chelating drugs DFP and DFX. The mean SF level at the 12th month was found to be 3016.73 ± 670.04 ng/mL (p = 0.002) in the DFX-treated group, which was quite significant in contrast to DFP response, where the value was 3204.06 ± 690.15 ng/mL (p = 0.14). There is no statistically significant (p = 0.15) difference on relative changes of the left ventricular ejection fraction (LVEF), between these two groups. The adverse effects were transient and none of them required stoppage of therapy. Deferasirox is more effective when compared to DFP in reducing chelating drug-related complications and iron overload specially in multiple transfusion dependent ß-TM patients.


Assuntos
Deferasirox , Deferiprona , Quelantes de Ferro , Sobrecarga de Ferro , Talassemia beta , Criança , Pré-Escolar , Deferasirox/efeitos adversos , Deferasirox/uso terapêutico , Deferiprona/efeitos adversos , Deferiprona/uso terapêutico , Ferritinas , Humanos , Quelantes de Ferro/efeitos adversos , Quelantes de Ferro/uso terapêutico , Sobrecarga de Ferro/complicações , Sobrecarga de Ferro/etiologia , Volume Sistólico , Função Ventricular Esquerda , Talassemia beta/tratamento farmacológico
15.
ACS Biomater Sci Eng ; 7(6): 2475-2484, 2021 06 14.
Artigo em Inglês | MEDLINE | ID: mdl-34060316

RESUMO

Precise control of intracellular redox status, i.e., maintenance of the physiological level of reactive oxygen species (ROS) for mediating normal cellular functions (oxidative eustress) while evading the excess ROS stress (distress), is central to the concept of redox medicine. In this regard, engineered nanoparticles with unique ROS generation, transition, and depletion functions have the potential to be the choice of redox therapeutics. However, it is always challenging to estimate whether ROS-induced intracellular events are beneficial or deleterious to the cell. Here, we propose the concept of redox buffering capacity as a therapeutic index of engineered nanomaterials. As a steady redox state is maintained for normal functioning cells, we hypothesize that the ability of a nanomaterial to preserve this homeostatic condition will dictate its therapeutic efficacy. Additionally, the redox buffering capacity is expected to provide information about the nanoparticle toxicity. Here, using citrate-functionalized trimanganese tetroxide nanoparticles (C-Mn3O4 NPs) as a model nanosystem, we explored its redox buffering capacity in erythrocytes. Furthermore, we went on to study the chronic toxic effect (if any) of this nanomaterial in the animal model to co-relate with the experimentally estimated redox buffering capacity. This study could function as a framework for assessing the capability of a nanomaterial as redox medicine (whether maintains eustress or damages by creating distress), thus orienting its application and safety for clinical use.


Assuntos
Nanopartículas , Nanoestruturas , Animais , Nanoestruturas/toxicidade , Oxirredução , Estresse Oxidativo , Espécies Reativas de Oxigênio
16.
Trans Indian Natl Acad Eng ; 6(2): 355-364, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-35837575

RESUMO

Regular monitoring of electrolyte balance is essential for patients suffering from chronic kidney disease (CKD), particularly those undergoing dialysis. In the context of the recent COVID-19 pandemic, more severe forms of infection are observed in elderly individuals and patients having co-morbidities like CKD. The repeated blood tests for the monitoring of electrolyte balance predispose them not only to COVID-19 but also other to hospital-acquired infections (HAI). Therefore, a non-invasive method for easy detection of essential electrolyte (K+ and Na+) levels is urgently needed. In this study, we developed an optical emission spectroscopy-based non-invasive device for simultaneous monitoring of salivary Na+ and K+ levels in a fast and reliable way. The device consisted of a closed spark chamber, micro-spectrometer, high voltage spark generator, electronic circuits, optical fiber, and an indigenously developed software based on the LabVIEW platform. The optical emission originating from the biological sample (i.e., saliva) due to recombination of ions energized by impingement of electrons returning from high voltage spark provides necessary information about the concentration of electrolytes. A small-scale clinical trial on 30 healthy human subjects shows the potential of the indigenously developed device in determining salivary Na + and K+ concentration. The low-cost, portable, point-of-care device requires only 2 mL of sample, and can simultaneously measure 1.0-190.0 mM Na+, and 1.0-270.9 mM K+ . To our understanding, the present work will find its relevance in combating COVID-19 morbidities, along with regular CKD patient-care.

17.
Adv Healthc Mater ; 10(7): e2001736, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33326181

RESUMO

The potentiality of nano-enzymes in therapeutic use has directed contemporary research to develop a substitute for natural enzymes, which are suffering from several disadvantages including low stability, high cost, and difficulty in storage. However, inherent toxicity, inefficiency in the physiological milieu, and incompatibility to function in cellular enzyme networks limit the therapeutic use of nanozymes in living systems. Here, it is shown that citrate functionalized manganese-based biocompatible nanoscale material (C-Mn3 O4 NP) efficiently mimics glutathione peroxidase (GPx) enzyme in the physiological milieu and easily incorporates into the cellular multienzyme cascade for H2 O2 scavenging. A detailed computational study reveals the mechanism of the nanozyme action. The in vivo therapeutic efficacy of C-Mn3 O4 nanozyme is further established in a preclinical animal model of Huntington's disease (HD), a prevalent progressive neurodegenerative disorder, which has no effective medication to date. Management of HD in preclinical animal trial using a biocompatible (non-toxic) nanozyme as a part of the metabolic network may uncover a new paradigm in nanozyme based therapeutic strategy.


Assuntos
Antioxidantes , Manganês , Animais , Materiais Biocompatíveis
18.
Clin Psychopharmacol Neurosci ; 18(4): 587-598, 2020 Nov 30.
Artigo em Inglês | MEDLINE | ID: mdl-33124591

RESUMO

OBJECTIVE: : Schizophrenia is a serious disease characterized by impairment in the perception or expression of reality, leading to occupational and social dysfunction. The use of antipsychotic medication is now universal in the first-line treatment of schizophrenia. This study was undertaken to compare the efficacy of asenapine with a standard atypical antipsychotic, olanzapine in treating this disease. METHODS: It was designed as a single blind, randomized, controlled, parallel group, single centre Phase IV trial of a newer atypical antipsychotic, asenapine versus existing standard atypical antipsychotic, olanzapine. Total 80 subjects were enrolled as per eligibility criteria.Each recruited subject received daily treatment with the trial medication (Olanzapine 10 mg or Asenapine 10 mg daily) for duration of 12 weeks. BPRS, CGI-S, CGI-I, Laboratory parameters and compliance was assessed and analyzed. Continuous variables were compared by t test and non-parametric data was analyzed by Mann-Whitney U test and Wilcoxon signed rank test. Likely categorical variables were analyzed by chi-square test or Fisher's exact test, as appropriate. RESULTS: The duration of schizophrenia at presentation was comparable in both the treatment groups. There was significant reduction of BPRS score between any two visits of each treatment groups. The decline in CGI-S and CGI-I scores was statistically significant (p < 0.001) when compared between visits of any of the both treatment arms. Adherence to treatment was excellent for all patients. CONCLUSION: Newer atypical antipsychotic asenapine is more effective than standard olanzapine in reducing the symptoms of schizophrenia in this study and further larger studies are to be done.

19.
Sci Rep ; 10(1): 11149, 2020 07 07.
Artigo em Inglês | MEDLINE | ID: mdl-32636410

RESUMO

The study was aimed to evaluate the performance of a newly developed non-invasive and non-contact bilirubin measurement device (AJO-Neo) as an alternative to the conventional invasive biochemical method of total serum bilirubin (TSB) estimation in preterm and term neonates suffering from hyperbilirubinemia associated with risk factors, and/or undergoing phototherapy. The safety and efficacy of the device were assessed in 1968 neonates with gestational ages ranging from 28 to 41 weeks and suffering from incidences of hyperbilirubinemia. Linear regression analysis showed a good correlation between AJO-Neo and the conventional method of TSB (Pearson's coefficient, r = 0.79). The small bias (0.27 mg/dL) and limits of agreements (- 3.44 to 3.99 mg/dL) were within the range of clinical acceptance. The device was also precise in the measurement of bilirubin levels in all subgroups of the study. The receiver operator curve (ROC), that takes account of both sensitivity and specificity of a device showed high efficacy of the device (area under the curve, AUC = 0.83) in the detection of bilirubin. While monitoring the bilirubin level during phototherapy, the device indicated promising results showing good agreement with TSB. Specificities and sensitivities of the device indicated a much higher accuracy in neonates with associated risk factors for hyperbilirubinemia. Hence, the newly developed device (AJO-Neo) is reliable in measuring bilirubin level in preterm, and term neonates irrespective of gestational or postnatal age, sex, risk factors, feeding behavior or skin color.


Assuntos
Bilirrubina/sangue , Hiperbilirrubinemia Neonatal/diagnóstico , Peso ao Nascer , Feminino , Idade Gestacional , Humanos , Hiperbilirrubinemia Neonatal/sangue , Recém-Nascido , Masculino , Estudos Prospectivos , Curva ROC , Reprodutibilidade dos Testes , Fatores de Risco , Sensibilidade e Especificidade
20.
IEEE J Biomed Health Inform ; 23(6): 2347-2353, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-30640639

RESUMO

OBJECTIVE: Careful screening of bilirubin level in newborns is mandatory as per American Academy of Pediatrics (2004), to reduce incidents of kernicterus and acute bilirubin encephalopathy. Although, invasive capillary collection of blood and subsequent biochemical test is considered a gold standard for jaundice detection in neonates, transcutaneous bilirubin measurement using various non-invasive instruments is also used sporadically across the globe. The major aim of this study was to develop a non-invasive spectrometry-based technique for measurement of neonatal bilirubin level as an alternative of total serum bilirubin (TSB) test without limitations of other available bilirubinometers. METHODS: The instrument comprises of a light source and a spectroscopic detector. A light beam from source incident on the neonatal nail plate through optical fibers. The retro reflected light is acquired using the detector. An indigenously developed software is used to acquire and analyze the optical signal and to calculate the bilirubin value. The instrument was calibrated and validated in reference to TSB on 1033 subjects. MAJOR RESULTS: The result (r = 0.95 and P < 0.001) indicates a strong correlation between the bilirubin value obtained from our method and TSB. Time variant analysis of the subjects undergoing phototherapy provided a good correlation (r = 0.98). The repeatability test result shows the mean coefficient of variation is less than 5.0%. CONCLUSIONS: The indigenously developed non-invasive technique successfully detects the bilirubin level in newborns under various physiological conditions with high accuracy and precision.


Assuntos
Bilirrubina/sangue , Hiperbilirrubinemia Neonatal/diagnóstico , Processamento de Sinais Assistido por Computador/instrumentação , Análise Espectral/métodos , Desenho de Equipamento , Humanos , Recém-Nascido , Unhas/irrigação sanguínea , Análise Espectral/instrumentação
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