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1.
World J Microbiol Biotechnol ; 40(8): 255, 2024 Jun 27.
Artigo em Inglês | MEDLINE | ID: mdl-38926189

RESUMO

Thermophilic actinomycetes are commonly found in extreme environments and can thrive and adapt to extreme conditions. These organisms exhibit substantial variation and garnered significant interest due to their remarkable enzymatic activities. This study evaluated the potential of Streptomyces griseorubens NBR14 and Nocardiopsis synnemataformans NBRM9 strains to produce thermo-stable amylase via submerged fermentation using wheat and bean straw. The Box-Behnken design was utilized to determine the optimum parameters for amylase biosynthesis. Subsequently, amylase underwent partial purification and characterization. Furthermore, the obtained hydrolysate was applied for ethanol fermentation using Saccharomyces cerevisiae. The optimal parameters for obtaining the highest amylase activity by NBR14 (7.72 U/mL) and NBRM9 (26.54 U/mL) strains were found to be 40 and 30 °C, pH values of 7, incubation time of 7 days, and substrate concentration (3 and 2 g/100 mL), respectively. The NBR14 and NBRM9 amylase were partially purified, resulting in specific activities of 251.15 and 144.84 U/mg, as well as purification factors of 3.91 and 2.69-fold, respectively. After partial purification, the amylase extracted from NBR14 and NBRM9 showed the highest activity level at pH values of 9 and 7 and temperatures of 50 and 60 °C, respectively. The findings also indicated that the maximum velocity (Vmax) for NBR14 and NBRM9 amylase were 57.80 and 59.88 U/mL, respectively, with Km constants of 1.39 and 1.479 mM. After 48 h, bioethanol was produced at concentrations of 5.95 mg/mL and 9.29 mg/mL from hydrolyzed wheat and bean straw, respectively, through fermentation with S. cerevisiae. Thermophilic actinomycetes and their α-amylase yield demonstrated promising potential for sustainable bio-ethanol production from agro-byproducts.


Assuntos
Actinobacteria , Amilases , Etanol , Fermentação , Saccharomyces cerevisiae , Temperatura , Triticum , Etanol/metabolismo , Amilases/metabolismo , Concentração de Íons de Hidrogênio , Cinética , Actinobacteria/metabolismo , Actinobacteria/enzimologia , Saccharomyces cerevisiae/metabolismo , Hidrólise , Streptomyces/enzimologia , Streptomyces/metabolismo , Estabilidade Enzimática
2.
BMC Microbiol ; 22(1): 294, 2022 12 09.
Artigo em Inglês | MEDLINE | ID: mdl-36482332

RESUMO

BACKGROUND: Bisphenol A (BPA) is a rapid spreading organic pollutant that widely used in many industries especially as a plasticizer in polycarbonate plastic and epoxy resins. BPA reported as a prominent endocrine disruptor compound that possesses estrogenic activity and fulminant toxicity. Pseudomonas putida YC-AE1 was isolated in our previous study and exerted a strong degradation capacity toward BPA at high concentrations; however, the molecular degradation mechanism is still enigmatic. RESULTS: We employed RNA sequencing to analyze the differentially expressed genes (DEGs) in the YC-AE1 strain upon BPA induction. Out of 1229 differentially expressed genes, 725 genes were positively regulated, and 504 genes were down-regulated. The pathways of microbial metabolism in diverse environments were significantly enriched among DEGs based on KEGG enrichment analysis. qRT-PCR confirm the involvement of BPA degradation relevant genes in accordance with RNA Seq data. The degradation pathway of BPA in YC-AE1 was proposed with specific enzymes and encoded genes. The role of cytochrome P450 (CYP450) in BPA degradation was further verified. Sever decrease in BPA degradation was recorded by YC-AE1 in the presence of CYP450 inhibitor. Subsequently, CYP450bisdB deficient YC-AE1 strain △ bisdB lost its ability toward BPA transformation comparing with the wild type. Furthermore, Transformation of E. coli with pET-32a-bisdAB empowers it to degrade 66 mg l-1 of BPA after 24 h. Altogether, the results showed the role of CYP450 in biodegradation of BPA by YC-AE1. CONCLUSION: In this study we propose the molecular basis and the potential role of YC-AE1cytochrome P450 monooxygenase in BPA catabolism.


Assuntos
Compostos Benzidrílicos , Sistema Enzimático do Citocromo P-450 , Fenóis , Pseudomonas putida , Sistema Enzimático do Citocromo P-450/genética , Perfilação da Expressão Gênica , Pseudomonas putida/genética , Pseudomonas putida/metabolismo , Compostos Benzidrílicos/metabolismo , Fenóis/metabolismo
3.
Molecules ; 26(7)2021 Apr 05.
Artigo em Inglês | MEDLINE | ID: mdl-33916423

RESUMO

A total of fourteen pyrazoline derivatives were synthesized through cyclo-condensation reactions by chalcone derivatives with different types of semicarbazide. These compounds were characterized by IR, 1D-NMR (1H, 13C and Distortionless Enhancement by Polarization Transfer - DEPT-135) and 2D-NMR (COSY, HSQC and HMBC) as well as mass spectroscopy analysis (HRMS). The synthesized compounds were tested for their antituberculosis activity against Mycobacterium tuberculosis H37Ra in vitro. Based on this activity, compound 4a showed the most potent inhibitory activity, with a minimum inhibitory concentration (MIC) value of 17 µM. In addition, six other synthesized compounds, 5a and 5c-5g, exhibited moderate activity, with MIC ranges between 60 µM to 140 µM. Compound 4a showed good bactericidal activity with a minimum bactericidal concentration (MBC) value of 34 µM against Mycobacterium tuberculosis H37Ra. Molecular docking studies for compound 4a on alpha-sterol demethylase was done to understand and explore ligand-receptor interactions, and to hypothesize potential refinements for the compound.


Assuntos
Inibidores de 14-alfa Desmetilase/síntese química , Antituberculosos/síntese química , Proteínas de Bactérias/antagonistas & inibidores , Pirazóis/síntese química , Semicarbazidas/síntese química , Esterol 14-Desmetilase/química , Inibidores de 14-alfa Desmetilase/farmacologia , Antituberculosos/farmacologia , Proteínas de Bactérias/química , Proteínas de Bactérias/metabolismo , Domínio Catalítico , Fluconazol/química , Fluconazol/farmacologia , Isoniazida/química , Isoniazida/farmacologia , Testes de Sensibilidade Microbiana , Simulação de Acoplamento Molecular , Mycobacterium tuberculosis/efeitos dos fármacos , Mycobacterium tuberculosis/enzimologia , Mycobacterium tuberculosis/crescimento & desenvolvimento , Ligação Proteica , Conformação Proteica , Domínios e Motivos de Interação entre Proteínas , Pirazóis/farmacologia , Semicarbazidas/farmacologia , Esterol 14-Desmetilase/metabolismo , Homologia Estrutural de Proteína , Termodinâmica
4.
S D Med ; 74(9): 414-416, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34461680

RESUMO

Diabetic ketoacidosis (DKA) is one of the most common causes of morbidity and mortality in patients with type 1 DM. Due to severe acidosis, ketonemia and electrolyte disturbances it can lead to various complications in the body, which can be fatal in some cases. Neurological complications related to DKA include cerebral edema, cerebral infarction, brain herniation, cortical venous thrombosis. It is very rare for DKA to cause subarachnoid hemorrhage (SAH). We present a case 19-year-old female with severe DKA, who developed SAH without any pre-existing aneurysm or other common risk factors. The patient did not have any neurologic deficits and was managed conservatively with the resolution of her symptoms. We have also summarized the existing literature regarding the association of DKA with subarachnoid hemorrhage.


Assuntos
Edema Encefálico , Cetoacidose Diabética , Hemorragia Subaracnóidea , Adulto , Edema Encefálico/diagnóstico por imagem , Edema Encefálico/etiologia , Infarto Cerebral , Cetoacidose Diabética/complicações , Feminino , Humanos , Fatores de Risco , Hemorragia Subaracnóidea/complicações , Hemorragia Subaracnóidea/diagnóstico por imagem , Adulto Jovem
5.
S D Med ; 74(11): 523-526, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-35008139

RESUMO

Cutibacterium acnes (C. acnes), known previously as Proprionebacterium acnes, is a common skin and mucous membrane colonizing bacteria. On rare occasions it has been associated with invasive infections in both immunocompetent and immunosuppressed patients. We describe the case of a 55-year-old female with a history of Sjogren's syndrome and psoriatic arthritis on TNF-alpha inhibitor therapy with etanercept. She presented with signs and symptoms of a thoracic infection with pulmonary nodules, hilar adenopathy, and bronchiectasis on thoracic computed tomography. She was diagnosed with C. acnes pneumonia based on culture growth from both endoscopic bronchial ultrasound transbronchial lymph node needle biopsy and navigational bronchoscopy transbronchial lung biopsy. Our patient noticed marked symptom relief and radiographic pulmonary parenchymal improvement with intravenous ceftriaxone provided for a six-week course. This case highlights the potential invasive disease caused by C. acnes, a common skin commensal.


Assuntos
Pneumonia , Propionibacterium acnes , Biópsia , Feminino , Humanos , Hospedeiro Imunocomprometido , Pessoa de Meia-Idade , Pele
6.
BMC Cancer ; 18(1): 362, 2018 04 02.
Artigo em Inglês | MEDLINE | ID: mdl-29609557

RESUMO

BACKGROUND: Volatile organic compounds (VOCs) emitted from exhaled breath from human bodies have been proven to be a useful source of information for early lung cancer diagnosis. To date, there are still arguable information on the production and origin of significant VOCs of cancer cells. Thus, this study aims to conduct in-vitro experiments involving related cell lines to verify the capability of VOCs in providing information of the cells. METHOD: The performances of e-nose technology with different statistical methods to determine the best classifier were conducted and discussed. The gas sensor study has been complemented using solid phase micro-extraction-gas chromatography mass spectrometry. For this purpose, the lung cancer cells (A549 and Calu-3) and control cell lines, breast cancer cell (MCF7) and non-cancerous lung cell (WI38VA13) were cultured in growth medium. RESULTS: This study successfully provided a list of possible volatile organic compounds that can be specific biomarkers for lung cancer, even at the 24th hour of cell growth. Also, the Linear Discriminant Analysis-based One versus All-Support Vector Machine classifier, is able to produce high performance in distinguishing lung cancer from breast cancer cells and normal lung cells. CONCLUSION: The findings in this work conclude that the specific VOC released from the cancer cells can act as the odour signature and potentially to be used as non-invasive screening of lung cancer using gas array sensor devices.


Assuntos
Cromatografia Gasosa-Espectrometria de Massas , Neoplasias Pulmonares/metabolismo , Microextração em Fase Sólida , Compostos Orgânicos Voláteis/análise , Compostos Orgânicos Voláteis/metabolismo , Algoritmos , Biomarcadores , Técnicas Biossensoriais , Linhagem Celular Tumoral , Células Cultivadas , Humanos , Reprodutibilidade dos Testes , Máquina de Vetores de Suporte
7.
Pediatr Blood Cancer ; 64(1): 81-88, 2017 01.
Artigo em Inglês | MEDLINE | ID: mdl-27578304

RESUMO

BACKGROUND: Pegylated-asparaginase (PEG-ASP) is a critical treatment for pediatric acute lymphoblastic leukemia (ALL) and has traditionally been delivered via intramuscular (IM) injection. In an attempt to reduce pain and anxiety, PEG-ASP has increasingly been delivered via intravenous (IV) administration. The study objective was to perform a meta-analysis and systematic review to compare and generate pooled hypersensitivity rates for IM and IV PEG-ASP. METHODS: A systematic literature search was conducted for all epidemiological studies that investigated IV and IM hypersensitivity rates for pediatric ALL. Included studies were critically appraised using the GRACE checklist. Pooled estimates and odds ratios with 95% confidence intervals (CIs) for IM and IV hypersensitivity rates were derived based on either a random or fixed effects model. RESULTS: Four studies satisfied the inclusion criteria and were of adequate quality. The random effects pooled hypersensitivity rates were 23.5% (95% CI 14.7-33.7) and 8.7% (95% CI 5.4-12.8) for IV and IM, respectively. The fixed effects pooled odds ratio after adjusting for publication bias was 2.49 (95% CI 1.62-3.83), indicating a significantly higher risk of hypersensitivity for IV over IM PEG-ASP. This risk is far more pronounced for high-risk (HR) patients compared with standard-risk (SR) patients (IV vs. IM: HR ↑35.2% and SR ↓2.9%). CONCLUSIONS: Although administering PEG-ASP through IV is preferable for patients, it poses a significantly higher risk of hypersensitivity when compared with IM administration, especially for HR patients. We recommend pediatric oncologists consider treating patients with HR pediatric ALL with IM PEG-ASP to reduce the risk of hypersensitivity.


Assuntos
Administração Intravenosa/efeitos adversos , Asparaginase/efeitos adversos , Hipersensibilidade a Drogas/etiologia , Injeções Intramusculares/efeitos adversos , Polietilenoglicóis/efeitos adversos , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamento farmacológico , Asparaginase/administração & dosagem , Humanos , Polietilenoglicóis/administração & dosagem , Prognóstico
8.
J Palliat Care ; 32(3-4): 121-126, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29153052

RESUMO

BACKGROUND: Nurses are the heart of the palliative care team who provide high standards of care since they spend the longest time with patients. However, lack of adequate knowledge of palliative care is considered as one of the main obstacles to palliative care improvement. AIM: A survey was conducted to assess Saudi nursing students' knowledge about palliative care. METHODS: Using a descriptive design, 154 students who enrolled in first year and who will graduate within 1 year were surveyed in a nursing college located in Riyadh, the capital of Saudi Arabia. The Palliative Care Quiz for Nursing (PCQN) was used to assess students' knowledge. RESULTS: The sample mean age was 22.1 (standard deviation (SD): 2.2), and most of the students were predominately female (93; 60.4%) and the majority were senior students who will be graduated within the current academic year (105; 68.2%). The total mean score of palliative care knowledge was low at 7.30 (SD: 0.56; range: 0-13), and the number of correctly answered statements ranged from 16 (10.4%, statement no. 7) to 91 (59.1%, statement no. 18). Eleven misconceptions about palliative care among participants are conceptually categorized into 3categories: principle and philosophy of palliative care, pain and symptom management, and psychological and spiritual care. CONCLUSION: Integrating palliative care education within the nursing programs is the backbone to improve nursing students' knowledge, namely, in principles of palliative care and symptom management.


Assuntos
Conhecimentos, Atitudes e Prática em Saúde , Cuidados Paliativos/psicologia , Estudantes de Enfermagem/psicologia , Adulto , Feminino , Humanos , Masculino , Arábia Saudita , Inquéritos e Questionários , Adulto Jovem
9.
Indian J Palliat Care ; 23(2): 199-206, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28503041

RESUMO

INTRODUCTION: End-of-life care is a critical issue for pediatric population with terminal illness to ensure the best possible quality of care for them and their families. A survey was conducted to identify the barriers and facilitators to provide pediatric end-of-life care. METHODS: A descriptive cross-sectional study was conducted at three tertiary centers providing end-of-life care in Jordan. Two hundred critical care nurses were surveyed (response rate 93%). RESULTS: Nurses reported moderate level of experience in all areas of delivering pediatric end-of-life care. The highest scoring of barriers respectively were patients-families barriers having deal with angry family member; health-care professional barriers multiple physicians, involved with one patient, who differ in opinion about the direction care, and where plan of care should go; and organizational barriers not available support person for the family. The highest scoring of facilitators respectively were of patients families facilitators having family members accept that the patient is dying; health-care professional-facilitators having a physician agrees about the direction of care, and organizational facilitators providing family members adequate time to be alone with the pediatric after he or she has died. CONCLUSION: Nurses perceived that patient-family, health-care professionals, and organizational related barriers and facilitators were had the most influence in providing of pediatric end-of-life care. Findings highlighted the need for additional education and support for pediatric staff, across professions, in providing pediatric end-of-life care. A pediatric end-of-life care team should be developed to assist in improving patients' quality of care and increasing the awareness for the need for a standardized tool to evaluate the nursing competency level concerning pediatric end-of-life care.

10.
BMC Bioinformatics ; 16: 158, 2015 May 14.
Artigo em Inglês | MEDLINE | ID: mdl-25971258

RESUMO

BACKGROUND: Effective management of patients with diabetic foot infection is a crucial concern. A delay in prescribing appropriate antimicrobial agent can lead to amputation or life threatening complications. Thus, this electronic nose (e-nose) technique will provide a diagnostic tool that will allow for rapid and accurate identification of a pathogen. RESULTS: This study investigates the performance of e-nose technique performing direct measurement of static headspace with algorithm and data interpretations which was validated by Headspace SPME-GC-MS, to determine the causative bacteria responsible for diabetic foot infection. The study was proposed to complement the wound swabbing method for bacterial culture and to serve as a rapid screening tool for bacteria species identification. The investigation focused on both single and poly microbial subjected to different agar media cultures. A multi-class technique was applied including statistical approaches such as Support Vector Machine (SVM), K Nearest Neighbor (KNN), Linear Discriminant Analysis (LDA) as well as neural networks called Probability Neural Network (PNN). Most of classifiers successfully identified poly and single microbial species with up to 90% accuracy. CONCLUSIONS: The results obtained from this study showed that the e-nose was able to identify and differentiate between poly and single microbial species comparable to the conventional clinical technique. It also indicates that even though poly and single bacterial species in different agar solution emit different headspace volatiles, they can still be discriminated and identified using multivariate techniques.


Assuntos
Algoritmos , Bactérias/classificação , Pé Diabético/diagnóstico , Pé Diabético/microbiologia , Nariz Eletrônico , Odorantes/análise , Bactérias/genética , Bactérias/isolamento & purificação , Técnicas Biossensoriais , Mineração de Dados , Análise Discriminante , Cromatografia Gasosa-Espectrometria de Massas , Humanos , Técnicas In Vitro , Redes Neurais de Computação , Máquina de Vetores de Suporte
11.
Int Orthop ; 39(10): 1901-8, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25971654

RESUMO

PURPOSE: Médecins sans Frontières (MSF) is one of the main providers of orthopaedic surgery in natural disaster and conflict settings and strictly imposes a minimum set of context-specific standards before any surgery can be performed. Based on MSF's experience of performing orthopaedic surgery in a number of such settings, we describe: (a) whether it was possible to implement the minimum standards for one of the more rigorous orthopaedic procedures--internal fixation--and when possible, the time frame, (b) the volume and type of interventions performed and (c) the intra-operative mortality rates and postoperative infection rates. METHODS: We conducted a retrospective review of routine programme data collected between 2007 and 2014 from three MSF emergency surgical interventions in Haiti (following the 2010 earthquake) and three ongoing MSF projects in Kunduz (Afghanistan), Masisi (Democratic Republic of the Congo) and Tabarre (Haiti). RESULTS: The minimum standards for internal fixation were achieved in one emergency intervention site in Haiti, and in Kunduz and Tabarre, taking up to 18 months to implement in Kunduz. All sites achieved the minimum standards to perform amputations, reductions and external fixations, with a total of 9,409 orthopaedic procedures performed during the study period. Intraoperative mortality rates ranged from 0.6 to 1.9 % and postoperative infection rates from 2.4 to 3.5 %. CONCLUSIONS: In settings affected by natural disaster or conflict, a high volume and wide repertoire of orthopaedic surgical procedures can be performed with good outcomes when minimum standards are in place. More demanding procedures like internal fixation may not always be feasible.


Assuntos
Desastres/estatística & dados numéricos , Procedimentos Ortopédicos/normas , Garantia da Qualidade dos Cuidados de Saúde/normas , Qualidade da Assistência à Saúde/normas , Afeganistão , Congo , Terremotos , Haiti , Humanos , Procedimentos Ortopédicos/efeitos adversos , Procedimentos Ortopédicos/métodos , Complicações Pós-Operatórias , Estudos Retrospectivos
12.
Cureus ; 16(2): e54421, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38510887

RESUMO

Coronavirus disease 2019 (COVID-19) often presents with a wide range of complications, including respiratory distress, acute respiratory distress syndrome (ARDS), and hypercoagulable states with resultant cerebrovascular incidents. Intra- and extra-pulmonological shunts can further complicate patient courses, leading to persistent hypoxemia and paradoxical emboli, resulting in potentially life-threatening consequences, necessitating a comprehensive, multidisciplinary approach to patient care. Here we present the case of a 73-year-old male who experienced severe persistent hypoxemic respiratory failure, superimposed methicillin-resistant Staphylococcus aureus (MRSA) pneumonia, and stroke with a previously undiagnosed patent foramen ovale (PFO) contributing to his clinical presentation.

13.
PLoS One ; 19(6): e0305001, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38905253

RESUMO

BACKGROUND: Reducing the risk of infection transmission by getting emergency care for pediatric patients is a challenging task. AIM: The study aim was to assess emergency nurses' readiness to provide care for pediatric patients with infectious diseases. METHOD: Two hundred Jordanian emergency department nurses were surveyed using a descriptive design. RESULTS: The study revealed that insufficient safety and infection control procedures were put into place, starting with family support to allow nurses to work 145 (78%), family care plans intended to assist caregivers 139 (74.7%), the availability of respiratory protection and a backup plan for standard precautions, training requirements, and equipment 131 (70.4%), create a unit pandemic safety strategy 124 (66.7%), have a plan for emergencies for at-risk staff 116 (62.4%), have a hospital pandemic safety plan 113 (60.8%), manage inventory 102 (54.8%), use reuse guidelines if there will be severe shortages 99 (53.2%), create a strategy for nurses' access to healthcare for themselves and their families 96 (51.6%), and end with any required system updates for new policies 88 (47.3%). Staff nurses made up a large proportion of participants (145; 78%; 115; 62.8%) who said they lacked experience with care for pediatric patients with infectious illnesses who were critically sick. A 62.8% of nurses reported they did not have training in infectious disease emergency prevention and control for pediatric patients. What nurses prioritize it was determined that the concept of crisis standards of care (34.9%) was the most important educational topic for training emergency room nurses to care for pediatric patients who are critically ill with infectious infections, while the clarity of communication pathways was ranked lowest. CONCLUSION: More training and support are needed for emergency room nurses to properly care for children's patients with infectious illnesses.


Assuntos
Serviço Hospitalar de Emergência , Humanos , Feminino , Masculino , Criança , Jordânia/epidemiologia , Adulto , Controle de Infecções/métodos , Inquéritos e Questionários , Prática Clínica Baseada em Evidências , Pessoa de Meia-Idade , Assistência ao Paciente
14.
Front Pharmacol ; 15: 1377420, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38666022

RESUMO

Pharmacogenomics (PGx) is a rapidly changing field of genomics in which healthcare professionals play an important role in its implementation in the clinical setting, however PGx level of adoption remains low. This study aims to investigate the attitude, self-confidence, level of knowledge, and their impact on health sciences undergraduate students' intentions to adopt PGx in clinical practice using a questionnaire developed based on the Theory of Planned Behavior (TPB). A model was proposed and a questionnaire was developed that was distributed to 467 undergraduate students of all academic years from four different departments of the University of Sharjah (UoS) including medical, dental, nursing, and pharmacy students from September 2022 to November 2022. Descriptive statistics along with factor analysis and regression analysis were conducted. The proposed model had a good internal consistency and fit. Attitude was the factor with the greatest impact on student's intentions followed by self-confidence and barriers. The level of knowledge had a meaningless impact. The majority of students shared a positive attitude and were aware of PGx benefits. Almost 60% of the respondents showed a high level of knowledge, while 50% of them were confident of implementing PGx in their clinical practice. Many students were prone to adopt PGx in their future careers. PGx testing cost and the lack of reimbursement were the most important barriers. Overall, students shared a positive intention and were prone to adopt PGx. In the future, it would be important to investigate the differences between gender, year of studies, and area of studies studies and their impact on students' intentions.

15.
RSC Adv ; 14(11): 7684-7698, 2024 Feb 29.
Artigo em Inglês | MEDLINE | ID: mdl-38444963

RESUMO

New phenylisoxazole quinoxalin-2-amine hybrids 5a-i were successfully synthesised with yields of 53-85% and characterised with various spectroscopy methods. The synthesised hybrids underwent in vitro α-amylase and α-glucosidase inhibitory assays, with acarbose as the positive control. Through the biological study, compound 5h exhibits the highest α-amylase inhibitory activity with IC50 = 16.4 ± 0.1 µM while compounds 5a-c, 5e and 5h exhibit great potential as α-glucosidase inhibitors, with 5c being the most potent (IC50 = 15.2 ± 0.3 µM). Among the compounds, 5h exhibits potential as a dual inhibitor for both α-amylase (IC50 = 16.4 ± 0.1 µM) and α-glucosidase (IC50 = 31.6 ± 0.4 µM) enzymes. Through the molecular docking studies, the inhibition potential of the selected compounds is supported. Compound 5h showed important interactions with α-amylase enzyme active sites and exhibited the highest binding energy of -8.9 ± 0.10 kcal mol-1, while compound 5c exhibited the highest binding energy of -9.0 ± 0.20 kcal mol-1 by forming important interactions with the α-glucosidase enzyme active sites. The molecular dynamics study showed that the selected compounds exhibited relative stability when binding with α-amylase and α-glucosidase enzymes. Additionally, compound 5h demonstrated a similar pattern of motion and mechanism of action as the commercially available miglitol.

17.
Comput Biol Chem ; 106: 107938, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37542847

RESUMO

In our effort to develop potent anti-hyperglycemic compounds with inhibitory activity against α-amylase and α-glucosidase, a series of novel quinoxaline-isoxazole moieties were synthesized. The novel quinoxaline-isoxazole derivatives were assessed in vitro for their anti-hyperglycemic activities on α-amylase and α-glucosidase inhibitions. The results revealed promising IC50 values compared to acarbose as a positive control for α-amylase and α-glucosidase. Among them, N-Ethyl-7-chloro-3-((3-phenylisoxazol-5-yl)methoxy)quinoxalin-2-amine 5b showed dual inhibitory with IC50 of 24.0 µM for α-amylase and 41.7 µM for α-glucosidase. In addition, N-Ethyl-7-methoxy-3-((3-(2-chlorophenyl)isoxazol-5-yl)methoxy)quinoxalin-2-amine 5j also had dual bioactivities against α-amylase and α-glucosidase with IC50 of 17.0 and 40.1 µM, respectively. Nevertheless, two more compounds N-Ethyl-7-cyano-3-((3-phenylisoxazol-5-yl)methoxy)quinoxaline-2-amine 5e showed strong mono-inhibition for α-glucosidase with IC50 of 16.6 µM followed by N-Ethyl-7-methoxy-3-((3-phenylisoxazol-5-yl)methoxy)quinoxalin-2-amine 5 f with IC50 of 18.6 µM. The molecular docking study for α-glucosidase inhibitor provided the binding energy ranging from 8.3 to 9.1 kcal/mol and α-amylase inhibitor showed the binding energy score at 8.4 and 8.5 kcal/mol. The dual inhibitions nature of 5b and 5j were further analyzed and confirmed via molecular dynamics including the stability of the compound, interaction energy, binding free energy, and the interaction residue analysis using the MM-GBSA approach. The results showed that compound 5j was the most potent compound. Lastly, the drug-likeness properties were also evaluated with all synthesized compounds 5a-5j and the results reveal that all potent compounds meet Lipinski's rules of five.


Assuntos
Quinoxalinas , alfa-Glucosidases , Simulação de Acoplamento Molecular , alfa-Glucosidases/metabolismo , Quinoxalinas/farmacologia , Inibidores de Glicosídeo Hidrolases/química , alfa-Amilases , Estrutura Molecular , Relação Estrutura-Atividade
18.
J Biomol Struct Dyn ; : 1-11, 2023 Oct 14.
Artigo em Inglês | MEDLINE | ID: mdl-37837430

RESUMO

Elevated interleukin 8 (IL-8) expression has been linked to unfavorable outcomes in a range of inflammatory conditions, such as rheumatoid arthritis, psoriasis, and cancer. The human monoclonal antibody (HuMab) 10F8 and the hybridoma 35B11-B bind to an epitope on human IL-8, respectively. 10F8 inhibited interaction between IL-8 and neutrophils in eczema and pustulosis palmoplantaris patients while 35B11-B decreased size lesion in rat model. The binding interaction of monoclonal antibodies and IL-8, especially how complementarity-determining region (CDR) loops could bind the N-terminal of IL-8, has not been fully deliberated at molecular-level. Here, we used a combination of molecular docking, heated and long coarse-grained molecular dynamics simulations to identify key residues of established interaction. Based on heated MD simulation, docked pose of complexes generated by ClusPro showed good binding stability throughout of 70 ns simulation. Based on long molecular dynamic simulations, key residues for the binding were identified throughout of 1000 ns simulation. TYR-53, ASP-99, and ARG-100 of heavy chain CDR together with TYR-33 of light chain CDR are among the highest contributing energy residues within the binding interaction. Meanwhile, LYS11 and TYR13 of IL-8 are important for the determination of overall binding energy. Furthermore, the result of decomposition residues analysis is in good agreement with the interaction analysis data. Current study provides a list of important interacting residues and further scrutiny on these residues is essential for future development and design of a new and stable recombinant antibody against IL-8.Communicated by Ramaswamy H. Sarma.

19.
PLoS One ; 18(11): e0294711, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38011137

RESUMO

BACKGROUND: Technology advancements have altered the standard of nursing care, and education. This suggests the necessity to equip prospective nurses to provide competent care in a highly technical and digital environment via telenursing. AIMS: The aim of this study was to assess the perceptions and knowledge of nursing students about telenursing. METHODS: Using a descriptive cross-sectional design. A self-reported questionnaire was used. The distribution of 110 questionnaires to nursing students attending two private colleges in Jordan resulted in an 83.6% (n = 92) response rate. Descriptive and inferential statistics were applied. RESULTS: The results showed a positive perception toward telenursing practice, as well as the difficulty in precisely defining telenursing. Age, internet usage patterns, and knowledge were all factors considered telenursing predictors. 32% of the variance was explained by the model. Telenursing would be beneficial for future nursing professionals by incorporating telenursing into the curriculum. CONCLUSIONS: The learning environment is extends somewhat beyond the classroom, making it is necessary to integrate telenursing into education in order to redefine the future of the nursing practice.


Assuntos
Estudantes de Enfermagem , Telenfermagem , Criança , Humanos , Estudos Transversais , Saúde da Criança , Estudos Prospectivos , Inquéritos e Questionários
20.
Healthcare (Basel) ; 11(9)2023 Apr 23.
Artigo em Inglês | MEDLINE | ID: mdl-37174751

RESUMO

Osteoarthritis (OA) is a public health disease that causes decreased mobility and leads to poor quality of life. A person's health-seeking behavior can influence their understanding of a disease, which in turn can alter its course. The objectives of this study were to measure the misconceptions about osteoarthritis and to identify the associated health-seeking behaviors. An online, self-administered, questionnaire-based study was conducted with 872 Arabic-speaking participants divided into three strata, group 1 comprising of patients with OA, group 2 participants with joint pain (without OA) and group 3 comprised of general population. Multivariate logistic regression analysis found that seeking care from general practitioners [3.29 (1.19, 9.16)], taking advice from friends [2.83 (1.08, 7.42)], seeking care from chiropractors [3.67 (1.02, 13.60)] and podiatrist [4.64 (1.31, 16.51)] were significantly associated with misconceptions, whereas, the odds were lower for those using social media [0.16 (0.06, 0.46)] and expert websites [0.63 (0.40, 0.99)]. The findings of this study imply that the level of misconceptions is high amongst all three strata.. Expert websites and social media have a positive effect on the management of osteoarthritis. However, general practitioners and allied health workers should regularly update their knowledge using refresher courses.

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