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1.
Int Microbiol ; 2024 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-38951390

RESUMO

Medicinal plants are rich sources of pharmaceutically important compounds and have been utilized for the treatment of various diseases since ancient times. Valeriana jatamansi Jones, also known as Indian valerian, holds a special place among temperate Himalayan medicinal plants and is renowned for its therapeutic properties in addressing a variety of ailments. The therapeutic potential of V. jatamansi is attributed to the presence of valuable compounds such as valepotriates, sesquiterpenoids, valeriananoids, jatamanins, lignans, cryptomeridiol, maaliol, xanthorrhizzol, and patchouli alcohol found in its rhizome and roots. This study employed various treatments, including the cultivation of V. jatamansi with the inoculation of Funneliformis mosseae, F. constrictus, and a consortium of arbuscular mycorrhizal fungi (AMF), to investigate their influence on biomass production, chlorophyll content, and the accumulation of bioactive compounds in V. jatamansi. The results revealed significant improvement in these parameters in the inoculated plants. The parameters of plants inoculated with F. mosseae were the highest, followed by those of plants inoculated with F. constrictus and a mixture of AMFs. This study not only underscores the potential of native AMF for promoting the growth of V. jatamansi but also elucidates their role in influencing the synthesis of bioactive compounds. The cultivation of V. jatamansi with native AMF has emerged as a sustainable and eco-friendly approach, providing the dual benefit of enhancing both the medicinal and economic value of this valuable plant. This research contributes valuable insights into the practical application of mycorrhizal associations for the cultivation of medicinal plants, bridging the realms of agriculture and pharmaceuticals.

2.
Microb Cell Fact ; 23(1): 66, 2024 Feb 24.
Artigo em Inglês | MEDLINE | ID: mdl-38402195

RESUMO

BACKGROUND: Komagataella phaffii (a.k.a. Pichia pastoris) harbors a glutamate utilization pathway in which synthesis of glutamate dehydrogenase 2 and phosphoenolpyruvate carboxykinase (PEPCK) is induced by glutamate. Glutamate-inducible synthesis of these enzymes is regulated by Rtg1p, a cytosolic, basic helix-loop-helix protein. Here, we report food-grade monosodium glutamate (MSG)-inducible recombinant protein production from K. phaffii PEPCK promoter (PPEPCK) using green fluorescent protein (GFP) and receptor binding domain of SARS-CoV-2 virus (RBD) as model proteins. RESULTS: PPEPCK-RBD/GFP expression cassette was integrated at two different sites in the genome to improve recombinant protein yield from PPEPCK. The traditional, methanol-inducible alcohol oxidase 1 promoter (PAOX1) was used as the benchmark. Initial studies carried out with MSG as the inducer resulted in low recombinant protein yield. A new strategy employing MSG/ethanol mixed feeding improved biomass generation as well as recombinant protein yield. Cell density of 100-120 A600 units/ml was achieved after 72 h of induction in shake flask cultivations, resulting in recombinant protein yield from PPEPCK that is comparable or even higher than that from PAOX1. CONCLUSIONS: We have designed an induction medium for recombinant protein production from K. phaffii PPEPCK in shake flask cultivations. It consists of 1.0% yeast extract, 2.0% peptone, 0.17% yeast nitrogen base with ammonium sulfate, 100 mM potassium phosphate (pH 6.0), 0.4 mg/L biotin, 2.0% MSG, and 2% ethanol. Substitution of ammonium sulphate with 0.5% urea is optional. Carbon source was replenished every 24 h during 72 h induction period. Under these conditions, GFP and RBD yields from PPEPCK equaled and even surpassed those from PAOX1. Compared to the traditional methanol-inducible expression system, the inducers of glutamate-inducible expression system are non-toxic and their metabolism does not generate toxic metabolites such as formaldehyde and hydrogen peroxide. This study sets the stage for MSG-inducible, industrial scale recombinant protein production from K. phaffii PPEPCK in bioreactors.


Assuntos
Metanol , Saccharomycetales , Metanol/metabolismo , Glutamato de Sódio/farmacologia , Glutamato de Sódio/metabolismo , Proteínas Recombinantes , Glutamatos/metabolismo , Saccharomycetales/genética , Saccharomycetales/metabolismo , Etanol/metabolismo , Pichia/genética , Pichia/metabolismo
3.
Curr Microbiol ; 80(6): 192, 2023 Apr 26.
Artigo em Inglês | MEDLINE | ID: mdl-37101055

RESUMO

The quest for increasing agricultural yield due to increasing population pressure and demands for healthy food has inevitably led to the indiscriminate use of chemical fertilizers. On the contrary, the exposure of the crops to abiotic stress and biotic stress interferes with crop growth further hindering the productivity. Sustainable agricultural practices are of major importance to enhance production and feed the rising population. The use of plant growth promoting (PGP) rhizospheric microbes is emerging as an efficient approach to ameliorate global dependence on chemicals, improve stress tolerance of plants, boost up growth and ensure food security. Rhizosphere associated microbiomes promote the growth by enhancing the uptake of the nutrients, producing plant growth regulators, iron chelating complexes, shaping the root system under stress conditions and decreasing the levels of inhibitory ethylene concentrations and protecting plants from oxidative stress. Plant growth-promoting rhizospheric microbes belong to diverse range of genera including Acinetobacter, Achromobacter, Aspergillus, Bacillus, Burkholderia, Flavobacterium, Klebsiella, Micrococcus, Penicillium, Pseudomonas, Serratia and Trichoderma. Plant growth promoting microbes are an interesting aspect of research for scientific community and a number of formulations of beneficial microbes are also commercially available. Thus, recent progress in our understanding on rhizospheric microbiomes along with their major roles and mechanisms of action under natural and stressful conditions should facilitate their application as a reliable component in the management of sustainable agricultural system. This review highlights the diversity of plant growth promoting rhizospheric microbes, their mechanisms of plant growth promotion, their role under biotic and abiotic stress and status of biofertilizers. The article further focuses on the role of omics approaches in plant growth promoting rhizospheric microbes and draft genome of PGP microbes.


Assuntos
Agricultura , Microbiota , Agricultura/métodos , Produtos Agrícolas/microbiologia , Reguladores de Crescimento de Plantas , Biodiversidade , Microbiologia do Solo
4.
Drug Dev Ind Pharm ; 49(11): 667-679, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37824711

RESUMO

OBJECTIVE: Present study was to observe the therapeutic aspects of seed cake extracts of Ocimum sanctum against the oral cancer cell line with the activation of p53 apoptotic pathway. METHOD: Seed cake extracts were characterized using GC-MS analysis. Cytotoxic activity was observed on KB cells and L929 cell through MTT assay and scratch assay. Antioxidant activity on KB cells were determined using enzymatic and non enzyme content in the treated cells. Chick chorioallantoic membrane (CAM) was established to check the presence of blood vessel formation and neuvasculature pattern in the treated fertilized eggs. DNA fragmentation and gene expression studies were also determined in the treated cells to check the upregulation of apoptotic pathways. RESULTS: GC-MS analysis confirmed alkaloids, phenols, and many. The cytotoxic activity showed maximum antiproliferative potential with aqueous extract, whereas no cytotoxic effect was observed on L929 cells. The ethanolic and aqueous extract has shown a greater SI value. Scratch assay has signified that aqueous extract has a lower migration rate of KB cells. Aqueous extract showed maximum enzymatic activity and lower malondialdehyde content in cells treated with ethanolic extract. CAM model confirmed that eggs treated with aqueous extract has shown inhibition of vasculature pattern and dissolutions of blood vessels. DNA Fragmentation and Gene expression studies confirmed maximum fold in the KB cell treated with an aqueous extract of seed cake leading to activation of p53 dependent apoptotic pathway. CONCLUSION: The potent therapeutic properties of seed cake extracts have been proven, and they can be used as herbal treatments to prevent oral cancer.


Assuntos
Alcaloides , Antineoplásicos , Neoplasias Bucais , Humanos , Proteína Supressora de Tumor p53 , Extratos Vegetais/farmacologia , Sementes , Neoplasias Bucais/tratamento farmacológico , Etanol
5.
Bioorg Chem ; 109: 104731, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33639361

RESUMO

Agro-waste material derived from N. tabacum has shown enormous potential antioxidant and antimicrobial activity. Hence in the present study, we investigated the wound healing efficacy of ethanolic extract of stem of Nicotiana tabacum on wistar rat model. Ethanolic extract prepared from defatted stem was to check various phytochemicals using spectrophotometric and chromatographic technique. The antioxidant potential was determined by FRAP and Reducing Power assay in extract. Cytotoxicity of extracts was determined using mouse fibroblast L929 cell lines by MTT assay. In vivo angiogenic activity was observed on chick chorioallantoic membrane (CAM) model by observing blood vessels formation and its branching. In vivo wound healing activity was observed on excision wounds in rat model by quantifying percentage of wound contraction, antioxidant activity and histopathology studies. From the present study, polyphenols, tannins and alkaloids were found to be determined in the ethanolic extract by means of spectrophotometric and chromatographic analysis against standards. Antioxidant assay revealed maximum antioxidant potential in ethanolic extract. Cytotoxic effect of extract has not been shown on L929 cell line. From CAM model, extract has shown growth of blood vessels formation at concentration of 480 µg/ml. Topical application of extracts on excision wounds, revealed wound healing activity i.e. 98.7% ± 0.002 on 14th day as well as enzymatic activity (SOD, CAT, GST) and non enzyme content (GSH and Lipid peroxidation) has been found to be high in granulated tissue. Hisopathological studies confirmed the re-epithelization in skin wounds. It can be concluded that stem of N. tabacum can be used as herbal remedy in wound healing process as a topical application.


Assuntos
Antioxidantes/farmacologia , Nicotiana/química , Extratos Vegetais/farmacologia , Cicatrização/efeitos dos fármacos , Animais , Antioxidantes/química , Antioxidantes/isolamento & purificação , Sobrevivência Celular/efeitos dos fármacos , Células Cultivadas , Relação Dose-Resposta a Droga , Masculino , Camundongos , Estrutura Molecular , Extratos Vegetais/química , Extratos Vegetais/isolamento & purificação , Ratos , Ratos Wistar , Relação Estrutura-Atividade
6.
Indian J Med Res ; 153(1 & 2): 7-16, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33818464

RESUMO

The recent outbreak of coronavirus disease 2019 (COVID-19) was declared a pandemic by the World Health Organization on March 11, 2020. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of COVID-19, primarily involves the respiratory system with viral pneumonia as a predominant manifestation. In addition, SARS-CoV-2 has various cardiovascular manifestations which increase morbidity and mortality in COVID-19. Patients with underlying cardiovascular diseases and conventional cardiovascular risk factors are predisposed for COVID-19 with worse prognosis. The possible mechanisms of cardiovascular injury are endothelial dysfunction, diffuse microangiopathy with thrombosis and increased angiotensin II levels. Hyperinflammation in the myocardium can result in acute coronary syndrome, myocarditis, heart failure, cardiac arrhythmias and sudden death. The high level of cardiac troponins and natriuretic peptides in the early course of COVID-19 reflects an acute myocardial injury. The complex association between COVID-19 and cardiovascular manifestations requires an in-depth understanding for appropriate management of these patients. Till the time a specific antiviral drug is available for COVID-19, treatment remains symptomatic. This review provides information on the cardiovascular risk factors and cardiovascular manifestations of COVID-19.


Assuntos
COVID-19/complicações , Doenças Cardiovasculares/virologia , Fatores de Risco de Doenças Cardíacas , Humanos , Pandemias
7.
Extremophiles ; 24(5): 749-758, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32705341

RESUMO

Psychrophilic fungi are a critical biotic component in cold deserts that serves a central role in nutrient recycling and biogeochemical cycles. Despite their ecological significance, culture-independent studies on psychrophilic mycobiome are limited. In the present study, the fungal diversity patterns across the Drass, an Indian cold desert in the Himalaya, were indexed by targeted amplicon pyrosequencing (ITS). In the Drass dataset, Ascomycota was represented by 92 genera, while 22 genera represented Basidiomycota. The most abundant genus was Conocybe (20.46%). Most of the identified genera were reported in the literature to be prolific extracellular hydrolytic enzyme producers. To identify whether the Drass fungal assemblages share similarities to other cold deserts, these were further compared to Antarctic and Arctic cold deserts. Comparative analysis across the three cold deserts indicated the dominance of Dikarya (Ascomycota and Basidiomycota). The observed alpha diversity, Shannon index as well as Pielou's evenness was highest in the Antarctic followed by Drass and Arctic datasets. The genera Malassezia, Preussia, Pseudogymnoascus, Cadophora, Geopora, Monodictys, Tetracladium, Titaea, Mortierella, and Cladosporium were common to all the cold deserts. Furthermore, Conocybe was represented predominantly in Drass. Interestingly, the genus Conocybe has not been previously reported from any other studies on Antarctic or Arctic biomes. To the best of our knowledge, this is the first fungal metagenome study in Drass soil. Our analysis shows that despite the similarities of low temperature among the cold deserts, a significant differential abundance of fungal communities prevails in the global cold deserts.


Assuntos
Fungos , Metagenoma , Micobioma , Regiões Antárticas , Regiões Árticas , Biodiversidade , Fungos/genética
8.
Artigo em Inglês | MEDLINE | ID: mdl-37724613
9.
Pol J Radiol ; 81: 491-497, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27800039

RESUMO

BACKGROUND: To evaluate the accuracy of high resolution ultrasound (USG) and MRI in the diagnosis of rotator cuff tears (RCT) and to determine if high resolution USG compares favorably in sensitivity and specificity to MRI in the diagnosis of rotator cuff injury. MATERIAL/METHODS: In this prospective comparative study, 40 patients with clinically suspected rotator cuff tears underwent both ultrasound and MRI of the shoulder. Out of these 40 patients, 31 patients who had positive findings for rotator cuff tears on ultrasound and/or MRI were finally included in the study while the remaining 9 patients with negative or unrelated findings were excluded. The USG and MRI were interpreted by two radiologists experienced in musculoskeletal radiology and blinded to findings of each other. Comparison was done using MRI as a standard reference. RESULTS: The agreement between USG and MRI for diagnosis of RCTs was statistically excellent; USG showed a sensitivity of 86.7% and a specificity of 100% for full-thickness tears, and a sensitivity of 89.7% and a specificity of 98.8% for partial-thickness tears; observed accuracy for full thickness tears was 98.4% and 95.9% for partial thickness tears. The Kappa coefficient of association was 0.91 for full thickness tears and 0.90 for partial thickness tears. CONCLUSIONS: Considering the comparable diagnostic accuracy of USG and MRI, the former modality can be used as a first-line investigation for diagnosis of RCT. MRI should be used secondarily as a problem-solving tool either following an equivocal shoulder USG or for delineation of anatomy in cases where surgical correction is needed.

11.
Mol Cell Biochem ; 392(1-2): 49-63, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24634009

RESUMO

The characterization of atherosclerosis as a chronic inflammatory disease has triggered extensive research worldwide to dissect the pro- and anti-inflammatory, cellular as well as molecular mechanisms governing the pathogenesis of this dreadful disease. Though several microRNAs have been shown to play crucial role in regulating lipid metabolism and inflammation, we are far from resolving the role of epigenomic signals in etiology of coronary heart disease (CHD). The present study was addressed to understand the role of a novel microRNA, miR-2909, in the regulation of genes involved in the initiation and progression of human coronary occlusion. Peripheral blood mononuclear cells were isolated from human CHD subjects at various stages of coronary occlusion (n = 80) and their corresponding normal healthy counterparts (n = 20). Various experimental strategies involving gene expression and silencing, reporter plasmid assays, and flow cytometric analysis were blend together to address the current problem. The present study shows for the first time that the blood cellular miR-2909 expression increases with the severity of coronary occlusion, exhibiting a strong positive correlation (r = 0.943 at p < 0.01). Further, miR-2909 was shown to regulate genes involved in inflammation, immunity, and oxLDL uptake, thereby contributing significantly to the initiation and progression of CHD patho-physiological process. Based upon these results, we propose that miR-2909 RNomics may be a step forward in understanding human CHD at the epigenomic level and can be exploited for designing new therapeutic strategies as well as diagnostic and prognostic markers for this disease in future.


Assuntos
Doença das Coronárias/genética , MicroRNAs/sangue , Doença das Coronárias/sangue , Humanos , Receptores X do Fígado , NF-kappa B/metabolismo , Receptores Nucleares Órfãos/metabolismo
12.
Natl Med J India ; 27(2): 70-5, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25471757

RESUMO

BACKGROUND: Rheumatic fever (RF)/rheumatic heart disease (RHD) continue to be a neglected public health priority. We carried out a registry-based control project, prospective surveillance and sample surveys to estimate the burden of disease. METHODS: We trained healthcare providers and established a surveillance system for the 1.1 million population of Rupnagar district in Punjab. In sample surveys conducted among schools, physicians examined the sampled children. Children with a cardiac murmur were investigated by echocardiography. Throat swabs were obtained from a sub-sample, and group A streptococci (GAS) were identified and emm typed by standard laboratory methods. We estimated the morbidity rates for RF/RHD from surveillance data and school surveys using a correction factor to account for under-registration of cases in the registry. RESULTS: A total of 813 RF/RHD cases were registered from 2002 to 2009. Of the 203 RF and 610 RHD cases, respectively, 51.2% and 36.7% were males. In the age group of 5-14 years, RF was more common (80%) than RHD (27%). The prevalence of RF/RHD in 5-14-year-old students was 1.0/1000 (95% CI 0.8-1.3). The school survey indicated that about two-thirds of the RF/RHD cases were enrolled in the hospital-based registries. Based on the school survey, the prevalence of RF/RHD was estimated to be 143/100,000 population. In the registry, the annual incidence of acute RF was estimated to be at least 8.7/100 000 children in the age group of 5-14 years. The prevalence of GAS was 2% (13/656) in children with sore throat and 0.5% (14/2920) among those not having sore throat. Typing of 27 GAS revealed 16 emm types. We estimate that about 1000 episodes of GAS pharyngitis lead to one episode of acute RF. CONCLUSION: RF/RHD continue to be a public health problem in Punjab, India.


Assuntos
Faringite/epidemiologia , Faringite/microbiologia , Febre Reumática/epidemiologia , Febre Reumática/microbiologia , Cardiopatia Reumática/epidemiologia , Cardiopatia Reumática/microbiologia , Infecções Estreptocócicas/epidemiologia , Infecções Estreptocócicas/microbiologia , Adolescente , Criança , Pré-Escolar , Ecocardiografia , Feminino , Humanos , Incidência , Índia/epidemiologia , Masculino , Vigilância da População , Prevalência , Estudos Prospectivos , Sistema de Registros
14.
J Clin Exp Hepatol ; 14(2): 101288, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38076448

RESUMO

Background: Transient infantile hypertriglyceridemia (TIH) is a syndrome of hypertriglyceridemia, fatty liver, and deranged liver functions with progression to fibrosis and cirrhosis. It is an autosomal recessive disorder caused by mutations in Glycerol-3-phosphate dehydrogenase 1 gene present on Chromosome 12q12-q13, and has been reported in Israeli Arab families with high consanguinity. TIH is suspected by high serum triglyceride levels and steatosis on liver biopsy; however, diagnosis is confirmed on clinical exome sequencing. Clinical description: We present two cases of TIH belonging to the indigenous Hindu, hilly population of Himachal Pradesh in North India with no history of either consanguinity or family history. Management and outcome: The parents of both the cases were counselled regarding the disease and importance of growth and lipid level monitoring. Conclusion: Though TIH is an extremely rare entity, awareness about it is required as it is a contributor to non-alcoholic fatty liver disease (NAFLD) in children. Any child presenting with hepatomegaly and elevated fasting triglyceride levels should be further investigated for TIH.

15.
Melanoma Res ; 2024 Mar 29.
Artigo em Inglês | MEDLINE | ID: mdl-38564430

RESUMO

The incidence and prevalence of melanoma are increasing globally, presenting a significant public health concern. The main genetic drivers of melanoma include BRAF, NRAS, KIT and triple wild-type (TWT) mutations. Little is known about the effects of these mutations on outcomes in terms of demographics and patient characteristics. We examined differences in melanoma mortality risk and mutation count across mutation type and patient disease profile. We extrapolated primary melanoma patient data from 14 studies via the cBioportal database. Patients were divided into demographic groups and classified according to BRAF, NRAS, KIT and TWT mutation status. Analyses included two-sample Student t-test and two-way analysis of variance tests analysis with Tukey's post hoc test. Survival outcomes were compared via Kaplan-Meier curve and Cox regression. NRAS-mutated patients exhibited decreased overall survival compared to BRAF-mutated patients. Male patients had higher mutation counts across all gene groups than females, with the fewest TWT mutations in comparison to BRAF, NRAS and KIT mutations. Males also exhibited increased mortality risk for NRAS, KIT and TWT mutations compared to BRAF mutations. An unknown primary melanoma was associated with increased mortality risk across all gene groups. NRAS-mutated acral melanoma patients had an increased mortality risk compared to NRAS-mutated cutaneous melanoma patients. Older patients had a higher mortality risk than younger patients. Patients with heavier versus lower weights had lower mortality risk, which was more pronounced for BRAF-mutated patients. These relationships highlight the importance of demographic and pathologic relationships to aid in risk assessment and personalize treatment plans.

16.
J Biomol Struct Dyn ; : 1-15, 2024 Mar 03.
Artigo em Inglês | MEDLINE | ID: mdl-38433407

RESUMO

Current investigation deals with the gel formulation of purified polyphenol loaded nanoparticles for enhanced wound healing. Polyphenols purified using column chromatography an were characterized using HPLC in fractions. Silver nanoparticles were characterization using SEM, AFM, TEM, DLS. Cytotoxic effect was checked on L929 (Mouse fibroblast cells). Bioactive loaded nanoparticles were formulated in gel and subjected for physical characterization. Excision wound wistar rat models were established to measure the wound contraction measurement, histopathological studies, and biochemical assays. Docking and Simulation studies were performed to check the binding and stability with receptors progressing the chronic wound. From the column chromatography, B fraction has shown the presence of maximum polyphenolic content and as well as the polyphenol compounds such as quercetin, rutin and tannic acid as confirmed by the HPLC. Synthesize B fraction-AgNP were found to be below 100 nm in size and spherical in shape as per the characterization. No cytotoxic effect was observed on L929 cells treated with B fraction and its nanoparticles. Formulated B fraction-AgNP gel has revealed the better stability and earlier wound contraction, i.e. before the completion of 14 days of topical treatment. Histopathology studies and collagen content has confirmed the re-epithelization in skin wounds. MD simulation revealed the stability with PI3K and AKT. This can be concluded that tobacco stem polyphenol loaded nanoparticles has potent wound healing activity that can be utilized as nano-drug delivery system for suppression of chronic wound development.Communicated by Ramaswamy H. Sarma.

17.
Cancer Biother Radiopharm ; 39(1): 19-34, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37797218

RESUMO

It is now well understood that many signaling pathways are vital in carrying out and controlling essential pro-survival and pro-growth cellular functions. The NOTCH signaling pathway, a highly conserved evolutionary signaling pathway, has been thoroughly studied since the discovery of NOTCH phenotypes about 100 years ago in Drosophila melanogaster. Abnormal NOTCH signaling has been linked to the pathophysiology of several diseases, notably cancer. In tumorigenesis, NOTCH plays the role of a "double-edged sword," that is, it may act as an oncogene or as a tumor suppressor gene depending on the nature of the context. However, its involvement in several cancers and inhibition of the same provides targeted therapy for the management of cancer. The use of gamma (γ)-secretase inhibitors and monoclonal antibodies for cancer treatment involved NOTCH receptors inhibition, leading to the possibility of a targeted approach for cancer treatment. Likewise, several natural compounds, including curcumin, resveratrol, diallyl sulfide, and genistein, also play a dynamic role in the management of cancer by inhibition of NOTCH receptors. This review outlines the functions and structure of NOTCH receptors and their associated ligands with the mechanism of the signaling pathway. In addition, it also emphasizes the role of NOTCH-targeted nanomedicine in various cancer treatment strategies.


Assuntos
Drosophila melanogaster , Neoplasias , Animais , Drosophila melanogaster/genética , Drosophila melanogaster/metabolismo , Neoplasias/tratamento farmacológico , Neoplasias/genética , Transdução de Sinais , Receptores Notch/genética , Receptores Notch/metabolismo , Oncogenes
18.
iScience ; 27(6): 110013, 2024 Jun 21.
Artigo em Inglês | MEDLINE | ID: mdl-38868190

RESUMO

Environmental enteric dysfunction (EED) is a subclinical enteropathy challenging to diagnose due to an overlap of tissue features with other inflammatory enteropathies. EED subjects (n = 52) from Pakistan, controls (n = 25), and a validation EED cohort (n = 30) from Zambia were used to develop a machine-learning-based image analysis classification model. We extracted histologic feature representations from the Pakistan EED model and correlated them to transcriptomics and clinical biomarkers. In-silico metabolic network modeling was used to characterize alterations in metabolic flux between EED and controls and validated using untargeted lipidomics. Genes encoding beta-ureidopropionase, CYP4F3, and epoxide hydrolase 1 correlated to numerous tissue feature representations. Fatty acid and glycerophospholipid metabolism-related reactions showed altered flux. Increased phosphatidylcholine, lysophosphatidylcholine (LPC), and ether-linked LPCs, and decreased ester-linked LPCs were observed in the duodenal lipidome of Pakistan EED subjects, while plasma levels of glycine-conjugated bile acids were significantly increased. Together, these findings elucidate a multi-omic signature of EED.

19.
Indian J Clin Biochem ; 28(3): 248-54, 2013 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24426219

RESUMO

Human serum paraoxonase-1 (PON1), an enzyme on HDL prevents oxidation of LDL thereby preventing the development of atherosclerosis. Studies done so far have lead to conflicting results. As studies are lacking in North-West Indian Punjabi's, a distinct ethnic group with high incidence of coronary artery disease, we determined PONase activity in this population. It has been postulated that sudden lowering of serum PONase may lead to precipitation of acute myocardial infarction. We determined serum PONase activity and lipids in 100 patients each of AMI (within 24 h of onset), stable CAD and 100 age and sex matched healthy controls. These were again determined after 6 weeks in AMI patients. The mean serum PONase activity was lowest in AMI patients (23.26 U/ml) followed by stable CAD patients (102.0 U/ml) where as in controls was highest (179.8 U/ml). In patients with AMI, activity was significantly higher at 6 weeks as compared to that after acute event (49.39 %; p < 0.05). Sudden lowering of serum PONase activity in a population which already has lower activity may be one of the risk factors for development of AMI.

20.
J Chromatogr Sci ; 61(2): 172-176, 2023 Feb 03.
Artigo em Inglês | MEDLINE | ID: mdl-35253055

RESUMO

Chirayata-the whole dried plant of Swertia chirayita-is an important traditional drug of Indian System of Medicines. A novel reverse-phase high performance liquid chromatography (RP-HPLC) method has been developed for the simultaneous determination and quantification of amaroswerin, amarogentin and andrographolide in a herbal drug "Chirayata," which is oftenly adulterated/substituted with herbal drug Kalmegh. The developed method is in accordance with International Council for Harmonization guidelines and is simple, precise, accurate, rapid, reproducible and specific to determine amarogentin, amaroswerin and andrographolide. Reverse-phase column (Water's X-bridge C18, 5 µm, 4.6 mm × 250 mm) with high resolution for all marker compounds was used with binary gradient elution (methanol:water) with a flow rate of 1 mL/min and detection at 235 nm. The developed method showed good linearity (R2 > 0.999) in a relatively wider range of concentration 2.968-95.00 ppm for amarogentin, amaroswerin and 5.625-180 ppm for andrographolide. The method is important for quality control analysis of drug Chirayata.


Assuntos
Iridoides , Cromatografia Líquida de Alta Pressão/métodos , Iridoides/análise
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