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1.
Int J Mol Sci ; 25(5)2024 Feb 28.
Artigo em Inglês | MEDLINE | ID: mdl-38474055

RESUMO

Angiotensin-converting enzyme (ACE) plays a crucial role in the pathogenesis of hypertension. Piper sarmentosum Roxb., an herb known for its antihypertensive effect, lacks a comprehensive understanding of the mechanism underlying its antihypertensive action. This study aimed to elucidate the antihypertensive mechanism of aqueous extract of P. sarmentosum leaves (AEPS) via its modulation of the ACE pathway in phorbol 12-myristate-13-acetate (PMA)-induced human umbilical vein endothelial cells (HUVECs). HUVECs were divided into five groups: control, treatment with 200 µg/mL AEPS, induction 200 nM PMA, concomitant treatment with 200 nM PMA and 200 µg/mL AEPS, and treatment with 200 nM PMA and 0.06 µM captopril. Subsequently, ACE mRNA expression, protein level and activity, angiotensin II (Ang II) levels, and angiotensin II type 1 receptor (AT1R) and angiotensin II type 2 receptor (AT2R) mRNA expression in HUVECs were determined. AEPS successfully inhibited ACE mRNA expression, protein and activity, and angiotensin II levels in PMA-induced HUVECs. Additionally, AT1R expression was downregulated, whereas AT2R expression was upregulated. In conclusion, AEPS reduces the levels of ACE mRNA, protein and activity, Ang II, and AT1R expression in PMA-induced HUVECs. Thus, AEPS has the potential to be developed as an ACE inhibitor in the future.


Assuntos
Forbóis , Piper , Humanos , Anti-Hipertensivos/farmacologia , Miristatos/metabolismo , Miristatos/farmacologia , Angiotensina II/metabolismo , Células Endoteliais/metabolismo , Células Cultivadas , Peptidil Dipeptidase A/metabolismo , Receptor Tipo 1 de Angiotensina/metabolismo , RNA Mensageiro/metabolismo , Acetatos/farmacologia , Forbóis/metabolismo , Forbóis/farmacologia
2.
Microb Pathog ; 185: 106430, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37940063

RESUMO

Fungi, bacteria, and viruses cause highly devastating diseases in species of the Cucurbitaceae family. Powdery mildew, a fungal disease, is one of the most important diseases of cucurbits. The pathogen, Podosphaera xanthii, is the most common causal agent of powdery mildew disease within cucurbits. The aim of this study was to investigate the effectiveness of the combined formulations of two biological agents, B. subtilis and B. thuringiensis, in combating powdery mildew disease, which represents a significant threat to C. pepo cultivation in Kayseri, Türkiye. The efficacy of six different treatments in controlling the disease agent P. xanthii was evaluated in susceptible zucchini genotypes. It was found that full-dose bacteria dilution application, before and after powdery mildew infection, as well as three- and five-fold bacteria dilutions application significantly prevented (1-2 scale value) powdery mildew disease on infected zucchini plants than the control application. There was a decrease in vegetative growth in the control-treated crops while plant growth increased significantly in bacterial-treated crops. Also, our findings showed that combined formulations made from Bacillus subtilis (61.29e and 3.3a strains) and Bacillus thuringiensis (2B3-1 and 2B2-2 strains) significantly increased the synthesis of plant defense enzymes such as DPPH, antioxidant, proline production, total phenolic substance, and total flavonoid content. The application of B + PM resulted in the highest enzyme contents, quantified as follows: 22.91 mg AAE/g antioxidant, 2.01 mg/g KU proline, 10.03 mg GAE/g TPC, and 7.756 mg CE/g TFC. These enzymes may have played vital roles in triggering zucchini defense mechanisms, thereby significantly preventing powdery disease in the bacteria-treated crops.


Assuntos
Bacillus thuringiensis , Cucurbita , Cucurbita/microbiologia , Bacillus subtilis , Antioxidantes , Prolina
3.
Int J Mol Sci ; 24(19)2023 Oct 09.
Artigo em Inglês | MEDLINE | ID: mdl-37834449

RESUMO

Endometriosis, a non-malignant gynecological disorder influenced by estrogen, involves the growth of endometrial tissue outside the uterus. Its development includes processes such as inflammation, progesterone resistance, angiogenesis, and cell proliferation. Epigenetic factors, particularly the dysregulation of microRNAs (miRNAs), have emerged as key factors in these mechanisms in endometriosis. This review aims to unveil the intricate molecular processes that control inflammation, progesterone resistance, and miRNA functions in endometriosis. In addition, it provides a comprehensive overview of the current understanding regarding the involvement of miRNAs in the inflammatory aspects of this condition. This synthesis encompasses research investigating the molecular underpinnings of inflammation, along with the biogenesis and roles of miRNAs in endometriosis. Furthermore, it examines human studies and functional analyses to establish the intricate connection between miRNAs, inflammation, and progesterone resistance in the context of endometriosis. The results highlight the significant impact of dysregulated miRNAs on the inflammatory pathways and hormonal imbalances characteristic of endometriosis. Consequently, miRNAs hold promise as potential non-invasive biomarkers and targeted therapeutic agents aimed at addressing inflammation and enhancing the response to progesterone treatment in individuals with endometriosis.


Assuntos
Endometriose , MicroRNAs , Doenças Uterinas , Feminino , Humanos , MicroRNAs/genética , MicroRNAs/metabolismo , Endometriose/tratamento farmacológico , Endometriose/genética , Endometriose/metabolismo , Endométrio/metabolismo , Progesterona/farmacologia , Progesterona/metabolismo , Receptores de Progesterona/metabolismo
4.
Int J Mol Sci ; 24(16)2023 Aug 17.
Artigo em Inglês | MEDLINE | ID: mdl-37629050

RESUMO

The homeobox A10 (HOXA10) gene is known to be related to endometriosis; however, due to a lack of knowledge/evidence in the pathogenesis of endometriosis, the mechanisms that link HOXA10 to endometriosis still need to be clarified. This review addresses the difference in the expression of the HOXA10 gene in endometriotic women versus non-endometriotic women across populations by country and discusses its influences on women's fertility. An organized search of electronic databases was conducted in Scopus, ScienceDirect, PubMed, and Web of Science. The keywords used were (HOXA10 OR "homeobox A10" OR PL OR HOX1 OR HOX1H OR HOX1.8) AND ("gene expression") AND (endometriosis). The initial search resulted in 623 articles, 10 of which were included in this review. All ten papers included in this study were rated fair in terms of the quality of the studies conducted. The expression of the HOXA10 gene was found to be downregulated in most studies. However, one study provided evidence of the downregulation and upregulation of HOXA10 gene expression due to the localization of endometriotic lesions. Measuring the expression of the HOXA10 gene in women is clinically essential to predicting endometriosis, endometrial receptivity, and the development of pinopodes in the endometrium during the luteal phase.


Assuntos
Benzenoacetamidas , Endometriose , Humanos , Feminino , Genes Homeobox , Endometriose/genética , Bases de Dados Factuais , Proteínas Homeobox A10
5.
J Pak Med Assoc ; 73(8): 1647-1652, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-37697756

RESUMO

OBJECTIVE: To explore the perceptions and experiences of nursing students and faculty members regarding the implementation of the baccalaureate nursing programme in public-sector setting. Methods: The descriptive, exploratory, qualitative study was conducted at the Khyber Medical University, Peshawar, Pakistan, from April 15, 2020 to April 15, 2021, and comprised undergraduate nursing students and faculty members. Because of the coronavirus disease-2019 pandemic, the subjects were interviewed through telephonic call using a semi-structured interview guide. Data was analysed using the Creswell's analysis approach. RESULTS: Of the 15 subjects, 10(66.6%) were students aged 21-24 years; 7(70%) males and 3(30%) females. The remaining 5(33.3%) subjects were faculty members aged 25-45 years and with teaching experience of 1-18 years; 2(40%) males and 3(60%) females. A total of 85 codes and 17 categories emerged under 5 major themes; programme positive impacts, curriculum revamping, students' challenges, faculty challenges, and recommendations. The participants believed that the four-year undergraduate nursing programme would improve the profession and quality of nursing care. Some perceived challenges were also pointed out regarding the curriculum, faculty, infrastructure and learning resources. Conclusion: Through the provision of an updated curriculum, qualified teaching faculty, appropriate learning resources and proper infrastructure, the undergraduate nursing programme can be successfully implemented in Pakistan.


Assuntos
COVID-19 , Bacharelado em Enfermagem , Estudantes de Enfermagem , Feminino , Masculino , Humanos , COVID-19/epidemiologia , Docentes , Currículo
6.
Malays J Med Sci ; 28(5): 34-41, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-35115885

RESUMO

The novel coronavirus (COVID-19) pandemic has affected the community at large. It has affected almost everyone and every aspect of social, economic and educational activities. Training in reproductive medicine has not been spared, as training in this field requires a combination of clinical interaction with patients, procedural experience, constant discussions and the element of research. The changes to numbers of new infections or active cases dictate the restrictions placed on the community and health care services alike. At the beginning of the pandemic, both the patients' fear of going to a health care facility and movement restrictions had caused a significant reduction in the number of COVID-19 cases. Furthermore, the Ministry of Health (MOH) Malaysia's recommendation to withhold all non-essential medical services, including those related to reproductive medicine, falls under this category. Therefore, it could negatively impact the quality of training and lead to an extension of training duration in reproductive medicine. Thus, the procedural experience could be supplemented with simulator training, teleconsultation could replace standard clinic sessions and online meeting platforms could replace routine academic meetings. Any modifications must be adaptable or flexible, as similar infectious pandemics and restrictions could recur from time to time.

7.
Malays J Med Sci ; 27(6): 7-14, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33447130

RESUMO

Endometriosis is an inflammatory condition characterised by the presence of endometrial growth beyond the uterine cavity. It is a debilitating disease requiring multiple modalities of treatment. In considering surgery as the option of treatment, the benefits should outweigh the risk. Besides direct surgical risk, intervention may lead to a reduction of ovarian reserve, in addition to premature menopause and low fecundity. To date, there is an inconclusive evidence to support any specific parameters in monitoring disease progression following surgical intervention. Serum cancer antigen (CA)-125 is expressed by coelomic epithelium and has been extensively studied as a biomarker for endometriosis. Elevated expression of CA-125 has been shown in endometrial tissues and the marker increased indirectly from peritoneal irritation that accompanies an extensive form of endometriosis. Additionally, the visual analogue scale (VAS) scores have been used as an objective measurement for measuring pain, especially in a complex disease such as endometriosis. This review aims to consolidate a series of clinical trials that utilised CA-125 level and VAS score as tools for monitoring patients undergoing surgery for endometriosis.

8.
Gynecol Endocrinol ; 35(1): 10-16, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30044157

RESUMO

Endometriosis is a benign, chronic inflammatory condition characterized by the presence and growth of endometrial implants outside the uterine cavity. The cause of endometriosis is multifactorial. It is due to the diversity of hypothesis and plausibility of hormonal alterations which could play a major role. Evidence has shown that progesterone resistance is a key factor for endometriosis sufferers. Medical therapy can avoid surgical intervention, which may lead to a reduced in ovarian reserve, and its effects of earlier menopause and reduced fecundity. Progesterone receptor isoform has provided new insight as the potential treatment. Progestin, anti-progestin and selective progesterone receptor modulators usage, which target these receptors, could avoid hypo-estrogenic side effects, which can be debilitating. Numerous types of these medications have been used on and off labeled to treat endometriosis with varying success. This review aims to consolidate series of clinical trials using progestins in endometriosis.


Assuntos
Endometriose/tratamento farmacológico , Progesterona/uso terapêutico , Feminino , Humanos , Resultado do Tratamento
9.
Pak J Pharm Sci ; 31(3): 769-775, 2018 May.
Artigo em Inglês | MEDLINE | ID: mdl-29716854

RESUMO

Helicobacter pylori (H. pylori) infections are very serious health problem that are further worsened by increasing/developing resistance to the current antibiotics. Therefore, new therapeutic agents are needed for H. pylori eradication. Use of a CD46 derived peptide (P3) as bactericidal agent against H. pylori has shown high activity rate in vivo and this study examines the changes in H. pylori features in response to effect of P3 treatment.AGS cells were infected with H. pylori wild type strain 67:21 and its mice passage strains (P3 treated and untreated strains) and further examined using immunoblotting assay, FACS and Urease activity analysis. Comparatively we found increased level of Urease alpha subunit A (UreA) and alkyl hydroperoxide reductase C (AhpC) proteins for P3 treated strain of H. pylori than its wild type or untreated strain after infection of AGS cells. Conclusion These results suggest that there might be a high rate of adherence to host cells for the P3 treated passage strain than untreated or wild type strain. Our findings also indicate that either adhesins are being changed or H. pylori interaction to the host cells is affected after P3 treatment.


Assuntos
Células Epiteliais/microbiologia , Mucosa Gástrica/microbiologia , Helicobacter pylori/isolamento & purificação , Animais , Proteínas de Bactérias/isolamento & purificação , Proteínas de Bactérias/fisiologia , Proteínas de Transporte/farmacologia , Proteínas de Transporte/uso terapêutico , Células Epiteliais/efeitos dos fármacos , Células Epiteliais/fisiologia , Mucosa Gástrica/efeitos dos fármacos , Mucosa Gástrica/fisiologia , Infecções por Helicobacter/tratamento farmacológico , Helicobacter pylori/efeitos dos fármacos , Helicobacter pylori/fisiologia , Peptídeos e Proteínas de Sinalização Intercelular , Camundongos , Peptídeos/farmacologia , Peptídeos/uso terapêutico
10.
J Oral Maxillofac Surg ; 74(2): 255.e1-8, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26549473

RESUMO

PURPOSE: This case series describes patients with head and neck arteriovenous malformations who underwent oral and maxillofacial surgical procedures combined with interventional radiology techniques to minimize blood loss. MATERIALS AND METHODS: Twelve patients underwent femoral cerebral angiography to visualize the extent of vascular malformation. Before the surgical procedures, surgical sites were devascularized by direct injection of hemostatic or embolic agents. Direct puncture sclerotherapy at the base of surgical sites was performed using Surgiflo or n-butylcyanoacrylate glue. Surgical procedures were carried out in routine fashion. A hemostatic packing of FloSeal, Gelfoam, and Avitene was adapted to the surgical sites. RESULTS: Direct puncture sclerotherapy with Surgiflo or n-butylcyanoacrylate glue resulted in minimal blood loss intraoperatively. Local application of the FloSeal, Gelfoam, and Avitene packing sustained hemostasis and produced excellent healing postoperatively. CONCLUSION: Patients with arteriovenous malformations can safely undergo routine oral and maxillofacial surgical procedures with minimal blood loss when appropriate endovascular techniques and local hemostatic measures are used by the interventional radiologist and oral and maxillofacial surgeon.


Assuntos
Malformações Arteriovenosas/cirurgia , Arcada Osseodentária/irrigação sanguínea , Procedimentos Cirúrgicos Bucais/métodos , Adolescente , Adulto , Idoso , Angiografia/métodos , Perda Sanguínea Cirúrgica/prevenção & controle , Criança , Colágeno/uso terapêutico , Embolização Terapêutica/métodos , Embucrilato/uso terapêutico , Óleo Etiodado/uso terapêutico , Feminino , Seguimentos , Esponja de Gelatina Absorvível/uso terapêutico , Hemostáticos/uso terapêutico , Humanos , Masculino , Pessoa de Meia-Idade , Procedimentos Cirúrgicos Minimamente Invasivos/métodos , Segurança do Paciente , Punções/métodos , Radiologia Intervencionista/métodos , Estudos Retrospectivos , Soluções Esclerosantes/uso terapêutico , Escleroterapia/métodos , Adulto Jovem
11.
Plant Cell Rep ; 34(5): 831-41, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-25627252

RESUMO

KEY MESSAGE: A salicylic acid-inducible WRKY gene, PtrWRKY73, from Populus trichocarpa , was isolated and characterized. Overexpression of PtrWRKY73 in Arabidopsis thaliana increased resistance to biotrophic pathogens but reduced resistance against necrotrophic pathogens. WRKY transcription factors are commonly involved in plant defense responses. However, limited information is available about the roles of the WRKY genes in poplar defense. In this study, we isolated a salicylic acid (SA)-inducible WRKY gene, PtrWRKY73, from Populus trichocarpa, belonging to group I family and containing two WRKY domains, a D domain and an SP cluster. PtrWRKY73 was expressed predominantly in roots, old leaves, sprouts and stems, especially in phloem and its expression was induced in response to treatment with exogenous SA. PtrWRKY73 was localized to the nucleus of plant cells and exhibited transcriptional activation. Overexpression of PtrWRKY73 in Arabidopsis thaliana resulted in increased resistance to a virulent strain of the bacterial pathogen Pseudomonas syringae (PstDC3000), but more sensitivity to the necrotrophic fungal pathogen Botrytis cinerea. The SA-mediated defense-associated genes, such as PR1, PR2 and PAD4, were markedly up-regulated in transgenic plants overexpressing PtrWRKY73. Arabidopsis non-expressor of PR1 (NPR1) was not affected, whereas a defense-related gene PAL4 had reduced in PtrWRKY73 overexpressor plants. Together, these results indicated that PtrWRKY73 plays a positive role in plant resistance to biotrophic pathogens but a negative effect on resistance against necrotrophic pathogens.


Assuntos
Arabidopsis/genética , Botrytis/fisiologia , Doenças das Plantas/imunologia , Proteínas de Plantas/metabolismo , Populus/genética , Pseudomonas syringae/fisiologia , Sequência de Aminoácidos , Arabidopsis/imunologia , Arabidopsis/metabolismo , Resistência à Doença , Expressão Gênica , Regulação da Expressão Gênica de Plantas , Genes Reporter , Dados de Sequência Molecular , Filogenia , Doenças das Plantas/microbiologia , Folhas de Planta/genética , Folhas de Planta/imunologia , Folhas de Planta/metabolismo , Proteínas de Plantas/genética , Raízes de Plantas/genética , Raízes de Plantas/imunologia , Raízes de Plantas/metabolismo , Caules de Planta/genética , Caules de Planta/imunologia , Caules de Planta/metabolismo , Plantas Geneticamente Modificadas , Ácido Salicílico/metabolismo , Plântula/genética , Plântula/imunologia , Plântula/metabolismo , Alinhamento de Sequência , Estresse Fisiológico , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo
12.
J Nanosci Nanotechnol ; 15(6): 4009-18, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-26369007

RESUMO

Polymeric micelles are used as 'smart drug carriers' for targeting certain areas of the body by making them stimuli-sensitive or by attachment of a specific ligand molecule onto their surface. The main aim of using polymeric micelles is to deliver the poorly water soluble drugs. Now-a-days they are used especially in the areas of cancer therapy also. In this article we have reviewed several aspects of polymeric micelles concerning their mechanism of formation, chemical nature, preparation and characterization techniques, and their applications in the areas of drug delivery.


Assuntos
Portadores de Fármacos , Micelas , Polímeros , Tamanho da Partícula , Preparações Farmacêuticas , Solubilidade
13.
Pak J Pharm Sci ; 27(2): 295-301, 2014 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24577918

RESUMO

UVB and UVC toxicity was detected in Chinese Hamster Ovary (CHO) cell lines AA8, UV5 and XEM2 (a V79-derived cell line expressing rat P450 1A1). Unlike FICZ-HPLC assay that showed induction of CYP1A1 enzyme activity after 20 minutes and 2 hour UVC exposure, the EROD assay showed no difference in cytochrome P450 1A1 (CYP1A1) activity after exposure to different doses of UVB and UVC light. Different cytotoxic and mutagenic effect of photo lesions induced by UVC and UVB light was investigated with the DRAG and HPRT assays, comparing the wild type cell line AA8 and the Nucleotide Excision Repair (NER) deficient cell line UV5. DRAG assay showed a significant difference in UV induced cytotoxicity between UVC and UVB reflecting the larger energy and toxic effect of UVC along with significant difference in UV induced toxicity between AA8 and UV5 cell lines. This was further validated through the HPRT assay, which also showed a significant difference in UVC (5 J/m(2)) induced mutagenic effect between these cell lines. In addition, HPRT assay showed the mutagenic effect of photosensitizer, acetophenone. These results show that UVB and UVC generate serious damage through photo products on DNA, and might induce the metabolic activity of CYP1A1.


Assuntos
Células CHO/efeitos da radiação , Mutação/genética , Mutação/efeitos da radiação , Raios Ultravioleta , Animais , Carbazóis/metabolismo , Linhagem Celular , Cromatografia Líquida de Alta Pressão , Cricetinae , Cricetulus , Citocromo P-450 CYP1A1/genética , Citocromo P-450 CYP1A1/metabolismo , Reparo do DNA , Hipoxantina Fosforribosiltransferase/genética , Hipoxantina Fosforribosiltransferase/metabolismo
14.
Chemosphere ; 351: 141180, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38218237

RESUMO

In contemporary wastewater treatment industry, advanced oxidation techniques, membrane filtration, ion exchange, and reverse osmosis are used to treat chemically loaded wastewater. All these methods required highly toxic oxidizing chemicals, high capital investment in membrane/filter materials, and the installation of sophisticated equipment. Wastewater treatment through an adsorption process using biomass-based adsorbent is economical, user-friendly, and sustainable. Neem tree waste has been explored as an adsorbent for wastewater treatment. The chemical components in the neem biomass include carbohydrates, fat, fiber, cellulose, hemicellulose, and lignin, which support the functionalization of neem biomass. Moreover, adsorbent preparation from renewable resources is not only cost-effective and environmentally friendly but also helps in waste management for sustainable growth. Contemporary researchers explored the pre- and post-surface-modified neem biomass adsorbents in scavenging the pollutants from contaminated water. This review extensively explores the activation process of neem biomass, physical and chemical methods of surface modification mechanism, and the factors affecting surface modification. The pollutant removal through pre and post-surface-modified neem biomass adsorbents was also summarized. Furthermore, it also provides a comprehensive summary of the factors that affect the adsorption performance of the neem biomass-derived adsorbents against dyes, metal ions, and other emerging pollutants. Understanding the surface-modification mechanisms and the adsorption efficiency factor of adsorbents will help in harnessing their potential for more efficiently combatting environmental pollution and making strides toward a greener and more sustainable future.


Assuntos
Azadirachta , Poluentes Ambientais , Poluentes Químicos da Água , Purificação da Água , Biomassa , Águas Residuárias , Purificação da Água/métodos , Adsorção
15.
Front Endocrinol (Lausanne) ; 15: 1274376, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38524634

RESUMO

The leading indicator for successful outcomes in in-vitro fertilization (IVF) is the quality of gametes in oocytes and sperm. Thus, advanced research aims to highlight the parameter in assessing these qualities - DNA fragmentation in sperm and oocyte development capacity (ODC) via evaluation of microenvironments involving its maturation process. Regarding oocytes, most evidence reveals the role of cumulus cells as non-invasive methods in assessing their development competency, mainly via gene expression evaluation. Our review aims to consolidate the evidence of GDF-9 derivatives, the HAS2, GREM1, and PTGS2 gene expression in cumulus cells used as ODC markers in relevant publications and tailored to current IVF outcomes. In addition to that, we also added the bioinformatic analysis in our review to strengthen the evidence aiming for a better understanding of the pathways and cluster of the genes of interest - HAS2, GREM1, and PTGS2 in cumulus cell level. Otherwise, the current non-invasive method can be used in exploring various causes of infertility that may affect these gene expressions at the cumulus cell level. Nevertheless, this method can also be used in assessing the ODC in various cohorts of women or as an improvement of markers following targeted tools or procedures by evaluating the advancement of these gene expressions following the targeted intervention.


Assuntos
Células do Cúmulo , Sêmen , Humanos , Masculino , Feminino , Ciclo-Oxigenase 2/genética , Ciclo-Oxigenase 2/metabolismo , Células do Cúmulo/metabolismo , Oócitos/metabolismo , Expressão Gênica , Peptídeos e Proteínas de Sinalização Intercelular/genética , Peptídeos e Proteínas de Sinalização Intercelular/metabolismo , Hialuronan Sintases/metabolismo
16.
Catheter Cardiovasc Interv ; 81(3): 488-93, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22234940

RESUMO

BACKGROUND: Optical coherence tomography (OCT) and near-infrared spectroscopy (NIRS) allow assessment of the anatomy (OCT) and composition (NIRS) of coronary lesions. We sought to examine the association between pre-stenting lipid core plaque (LCP), as assessed by NIRS and post-stenting thrombus formation, as assessed by OCT. METHODS: We reviewed the angiograms of nine patients who underwent coronary stenting in association with NIRS and OCT imaging. A large LCP by NIRS was defined as at least three 2-mm yellow blocks on the NIRS block chemogram with >200° angular extent. Intracoronary thrombus was defined as a mass of medium reflectivity protruding into the vessel lumen, discontinuous from the surface of the vessel wall. RESULTS: Mean age was 67 ± 7 years, and all patients were men, presenting with stable angina (56%), unstable angina (11%), or acute myocardial infarction (33%). The mean vessel lipid core burden index (LCBI) was 120 ± 45, and the mean highest 6-mm LCBI was 386 ± 190. Three patients had a large LCP and two of them (66%) developed intrastent thrombus after stent implantation compared to none of six patients without large LCPs (0%, P = 0.02). The thrombus resolved after intracoronary glycoprotein IIb/IIIa administration and balloon postdilation. Postprocedural myocardial infarction occurred in 33% versus 17% of patients with and without large LCP, respectively (P = 0.57). CONCLUSION: Stenting of large LCPs may be associated with intrastent thrombus formation, suggesting that more intensive anticoagulant and/or antiplatelet therapy may be beneficial in such lesions. © 2012 Wiley Periodicals, Inc.


Assuntos
Vasos Coronários/química , Oclusão de Enxerto Vascular/diagnóstico , Lipídeos/análise , Placa Aterosclerótica/química , Espectroscopia de Luz Próxima ao Infravermelho/métodos , Stents , Tomografia de Coerência Óptica/métodos , Idoso , Estenose Coronária/cirurgia , Vasos Coronários/patologia , Seguimentos , Oclusão de Enxerto Vascular/metabolismo , Humanos , Masculino , Intervenção Coronária Percutânea , Placa Aterosclerótica/patologia , Reprodutibilidade dos Testes
17.
Eur Heart J ; 33(3): 372-83, 2012 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22019821

RESUMO

AIMS: To test the hypothesis that near-infrared spectroscopy (NIRS) combined with intravascular ultrasound (IVUS) would provide novel information of human coronary plaque characterization. METHODS AND RESULTS: Greyscale-IVUS, virtual histology (VH)-IVUS, and NIRS were compared in 131 native lesions (66 vessels) that were interrogated during catheterization by all three modalities. Greyscale-IVUS detected attenuated and echolucent plaques correlated with NIRS-detected lipid-rich areas. Attenuated plaques contained the highest NIRS probability of lipid core, followed by echolucent plaques. By VH-IVUS, 93.5% of attenuated plaques contained confluent necrotic core (NC) and were classified as VH-derived fibroatheromas (FAs). Although 75.0% of echolucent plaques were classified as VH-FAs, VH-NC was seen surrounding an echolucent zone, but not within any echolucent zone; and echolucent zones themselves contained fibrofatty and/or fibrous tissue. All calcified plaques with arc >90° contained >10% VH-NC (range 16.0-41.2%) and were classified as calcified VH-FAs, but only 58.5% contained NIRS-detected lipid core. A positive relationship between VH-derived %NC and NIRS-derived lipid core burden index was found in non-calcified plaques, but not in calcified plaques. CONCLUSION: Combining NIRS with IVUS contributes to the understanding of plaque characterization in vivo. Further studies are warranted to determine whether combining NIRS and IVUS will contribute to the assessment of high-risk plaques to predict outcomes in patients with coronary artery disease.


Assuntos
Doença da Artéria Coronariana/diagnóstico , Placa Aterosclerótica/diagnóstico , Espectroscopia de Luz Próxima ao Infravermelho/métodos , Ultrassonografia de Intervenção/métodos , Idoso , Doença da Artéria Coronariana/diagnóstico por imagem , Feminino , Humanos , Processamento de Imagem Assistida por Computador/métodos , Masculino , Pessoa de Meia-Idade , Placa Aterosclerótica/diagnóstico por imagem
18.
Heliyon ; 9(8): e18730, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-37576305

RESUMO

Several studies have been conducted on Bacillus thuringiensis (Bt) pesticidal toxins due to their successful environmentally friendly biopesticide activity against various insect pest orders, protozoa, mites, and nematodes. However, no existing study has systematically examined the trends and evolution of research on Bt pesticidal toxins from a scientometric perspective. This study aimed to analyze the trends and hotspots of global research in this field. 5757 publications on Bt pesticidal toxins were extracted from the Web of Science Core Collection (WoS) from 1980 to 2021. Statistical and scientometric analyses were performed using Excel, CiteSpace, and VOSviewer visualization tools to evaluate research evolution, journal contribution and subject categories, contributing countries and institutions, highly influential references, and most used author keywords. The 5757 publications featured in 917 journals spanning 116 subject categories. The top 5 subject categories ranked as Entomology, Biotechnology & Applied Microbiology, Microbiology, Biochemistry & Molecular Biology, and Agriculture. Out of these publications, the USA contributed the most, with 1562 publications, 72,754 citations, and 46.58 average citations per paper (ACPP); however, Belgium had the highest (106.43) ACPP among the top 20 contributing countries. The Chinese Academy of Agricultural Sciences is the leading institution with 298 publications and 21.20 ACPP. The Pasteur Institute is ranked first (90.04) in terms of ACPP. Keywords analyses revealed that recent studies are inclined toward the evolution of insect resistance against Bt toxins. In future, studies related to the development of resistance mechanisms by insects against Bt pesticidal toxins and ways to overcome them will likely receive more attention. This study highlights the past and current situations and prospective directions of Bt pesticidal toxins-related research.

19.
Life (Basel) ; 13(6)2023 May 24.
Artigo em Inglês | MEDLINE | ID: mdl-37374020

RESUMO

Despite many studies exploring the effects of DHEA supplementation, its application in IVF procedure continues to be a subject of debate owing to the inconsistent findings and the lack of rigorously designed, large-scale, randomized trials. Our review aims to explore the effectiveness of DHEA supplementation in ovarian cumulus cells following IVF/ICSI treatment. We conducted a literature search of Pub-Med, Ovid MEDLINE, and SCOPUS (inception to June 2022) for all relevant articles, including the keywords of "dehydroepiandrosterone/DHEA", "oocyte", and "cumulus cells". From the preliminary search, 69 publications were identified, and following a thorough screening process, seven studies were ultimately incorporated into the final review. Four hundred twenty-four women were enrolled in these studies, with DHEA supplementation being administered exclusively to women exhibiting poor ovarian response/diminished ovarian reserve or belonging to an older age demographic. The intervention in the studies was DHEA 75-90 mg daily for at least 8-12 weeks. The only randomized controlled trial showed no difference in clinical or cumulus cell-related outcomes between the control and treatment groups. However, the remaining six studies (two cohorts, four case-controls) showed significant beneficial effects of DHEA in cumulus cell-related outcomes compared to the group (older age or POR/DOR) without DHEA supplementation. All studies revealed no significant difference in stimulation and pregnancy outcomes. Our review concludes that DHEA supplementation did show beneficial effect on ovarian cumulus cells in improving oocyte quality for women of advanced age or with poor ovarian responders.

20.
Horm Mol Biol Clin Investig ; 44(4): 379-384, 2023 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-38124670

RESUMO

OBJECTIVES: Unexplained subfertility (UEI) describes a couple whose standard subfertility workout consider acceptable but unable to conceived. METHODS: This retrospective study was conducted in the Advanced Reproductive Centre, UKM Hospital, Kuala Lumpur, from January 2016 to December 2019. The data of 268 UEI couples were obtained from the clinical database. Women aged 21-45 years old was included and further divided into four groups according to the female partner's age and subfertility duration: group A (age <35 years and subfertility <2 years), group B (age <35 years and subfertility >2 years), group C (age >35 years and subfertility <2 years), and group D (age >35 years and subfertility <2 years). All statistical analyses were performed using SPSS 22.0 for Windows. RESULTS: A total of 255 cases were included in this study. The mean age of the women was 32.9 ± 4.04 years, and the mean subfertility duration was 5.04 ± 2.9 years. A total of 51 (20 %) cases underwent timed sexual intercourse, 147 (57.6 %) cases had intrauterine insemination (IUI), whereas 57 (22.4 %) cases opted for in vitro fertilization (IVF). A total of 204 cases underwent active management (IUI/IVF), which showed a significant difference (p<0.05). Out of eight clinical pregnancies, half of them were from group B. CONCLUSIONS: Active management in younger women with a shorter subfertility duration revealed a better pregnancy outcome. Otherwise, individualized treatment should be considered in selecting a suitable treatment plan.


Assuntos
Infertilidade , Inseminação Artificial , Gravidez , Feminino , Humanos , Adulto , Adulto Jovem , Pessoa de Meia-Idade , Estudos Retrospectivos , Tratamento Conservador , Indução da Ovulação , Infertilidade/diagnóstico , Infertilidade/etiologia , Infertilidade/terapia , Fertilização in vitro
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