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2.
Int J Surg ; 2024 Apr 23.
Artigo em Inglês | MEDLINE | ID: mdl-38652180

RESUMO

As one of the leading causes of global mortality and morbidity, various neurological diseases cause social and economic burdens. Despite significant advances in the treatment of neurological diseases, establishing a proper disease model, especially for degenerative and infectious diseases, remains a major challenging issue. For long, mice were the model of choice but suffered from serious drawbacks of differences in anatomical and functional aspects of the nervous system. Furthermore, the collection of post-mortem brain tissues limits their usage in cultured cell lines. Overcoming such limitations has prompted the usage of stem cells derived from the peripheral nervous system, such as the cells of the olfactory mucosa as a preferred choice. These cells can be easily cultured in vitro and retain the receptors of neuronal cells life-long. Such cells have various advantages over embryonic or induced stem cells, including homology, and ease of culture and can be conveniently obtained from diseased individuals through either biopsies or exfoliation. They have continuously helped in understanding the genetic and developmental mechanisms of degenerative diseases like Alzheimer's and Parkinson's disease. Moreover, the mode of infection of various viruses that can lead to post-viral olfactory dysfunction, such as the Zika virus can be monitored through these cells in vitro and their therapeutic development can be fastened.

3.
ACS Appl Bio Mater ; 6(11): 4814-4827, 2023 11 20.
Artigo em Inglês | MEDLINE | ID: mdl-37886889

RESUMO

Bacterial infections and persistent inflammation can impede the intrinsic healing process of wounds. To combat this issue, researchers have delved into the potential use of carbon dots (CDs) in the regulation of inflammation and counteract infections. These CDs were synthesized using a microwave-assisted hydrothermal process and have demonstrated outstanding antibacterial and antibiofilm properties against Gram-positive and Gram-negative bacteria. Additionally, CDs displayed biocompatibility at therapeutic concentrations and the ability to specifically target mitochondria. CD treatment effectively nullified lipopolysaccharide-triggered reactive oxygen species production by macrophages, while simultaneously promoting macrophage polarization toward an anti-inflammatory phenotype (M2), leading to a reduction in inflammation and an acceleration in wound healing. In vitro scratch assays also revealed that CDs facilitated the tissue-repairing process by stimulating epithelial cell migration during reepithelialization. In vivo studies using CDs topically applied to lipopolysaccharide (LPS)-stimulated wounds in C57/BL6 mice demonstrated significant improvements in wound healing due to enhanced fibroblast proliferation, angiogenesis, and collagen deposition. Crucially, histological investigations showed no indications of systemic toxicity in vital organs. Collectively, the application of CDs has shown immense potential in speeding up the wound-healing process by regulating inflammation, preventing bacterial infections, and promoting tissue repair. These results suggest that further clinical translation of CDs should be considered.


Assuntos
Antibacterianos , Infecções Bacterianas , Camundongos , Animais , Antibacterianos/farmacologia , Antibacterianos/uso terapêutico , Lipopolissacarídeos/farmacologia , Bactérias Gram-Negativas , Bactérias Gram-Positivas , Cicatrização , Macrófagos , Inflamação
4.
Genes Dis ; 10(4): 1367-1401, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37397557

RESUMO

Cancer is an abnormal state of cells where they undergo uncontrolled proliferation and produce aggressive malignancies that causes millions of deaths every year. With the new understanding of the molecular mechanism(s) of disease progression, our knowledge about the disease is snowballing, leading to the evolution of many new therapeutic regimes and their successive trials. In the past few decades, various combinations of therapies have been proposed and are presently employed in the treatment of diverse cancers. Targeted drug therapy, immunotherapy, and personalized medicines are now largely being employed, which were not common a few years back. The field of cancer discoveries and therapeutics are evolving fast as cancer type-specific biomarkers are progressively being identified and several types of cancers are nowadays undergoing systematic therapies, extending patients' disease-free survival thereafter. Although growing evidence shows that a systematic and targeted approach could be the future of cancer medicine, chemotherapy remains a largely opted therapeutic option despite its known side effects on the patient's physical and psychological health. Chemotherapeutic agents/pharmaceuticals served a great purpose over the past few decades and have remained the frontline choice for advanced-stage malignancies where surgery and/or radiation therapy cannot be prescribed due to specific reasons. The present report succinctly reviews the existing and contemporary advancements in chemotherapy and assesses the status of the enrolled drugs/pharmaceuticals; it also comprehensively discusses the emerging role of specific/targeted therapeutic strategies that are presently being employed to achieve better clinical success/survival rate in cancer patients.

5.
Food Chem Toxicol ; 171: 113511, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36450305

RESUMO

The devastating complications of coronavirus disease 2019 (COVID-19) result from an individual's dysfunctional immune response following the initial severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Multiple toxic stressors and behaviors contribute to underlying immune system dysfunction. SARS-CoV-2 exploits the dysfunctional immune system to trigger a chain of events ultimately leading to COVID-19. The current study identifies eighty immune system dysfunction-enabling toxic stressors and behaviors (hereafter called modifiable contributing factors (CFs)) that also link directly to COVID-19. Each CF is assigned to one of the five categories in the CF taxonomy shown in Section 3.3.: Lifestyle (e.g., diet, substance abuse); Iatrogenic (e.g., drugs, surgery); Biotoxins (e.g., micro-organisms, mycotoxins); Occupational/Environmental (e.g., heavy metals, pesticides); Psychosocial/Socioeconomic (e.g., chronic stress, lower education). The current study shows how each modifiable factor contributes to decreased immune system capability, increased inflammation and coagulation, and increased neural damage and neurodegeneration. It is unclear how real progress can be made in combatting COVID-19 and other similar diseases caused by viral variants without addressing and eliminating these modifiable CFs.


Assuntos
COVID-19 , Humanos , SARS-CoV-2 , Inflamação , Sistema Imunitário
7.
J Control Release ; 350: 698-715, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-36057397

RESUMO

Quantum dots (QDs) are semiconductor nanocrystals possessing unique optoelectrical properties in that they can emit light energy of specific tunable wavelengths when excited by photons. They are gaining attention nowadays owing to their all-around ability to allow high-quality bio-imaging along with targeted drug delivery. The most lethal central nervous system (CNS) disorders are brain cancers or malignant brain tumors. CNS is guarded by the blood-brain barrier which poses a selective blockade toward drug delivery into the brain. QDs have displayed strong potential to deliver therapeutic agents into the brain successfully. Their bio-imaging capability due to photoluminescence and specific targeting ability through the attachment of ligand biomolecules make them preferable clinical tools for coming times. Biocompatible QDs are emerging as nanotheranostic tools to identify/diagnose and selectively kill cancer cells. The current review focuses on QDs and associated nanoformulations as potential futuristic clinical aids in the continuous battle against brain cancer.


Assuntos
Neoplasias Encefálicas , Pontos Quânticos , Neoplasias Encefálicas/diagnóstico por imagem , Neoplasias Encefálicas/tratamento farmacológico , Sistemas de Liberação de Medicamentos/métodos , Humanos , Ligantes , Pontos Quânticos/química , Nanomedicina Teranóstica
8.
Biomed Pharmacother ; 146: 112555, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-34954639

RESUMO

Human exposure to radiation has expanded considerably in recent years, due to a wide range of medical, agricultural, and industrial applications. Despite its beneficial utilities, radiation is also known to have a deleterious effect on cells and tissues, largely through the creation of free radicals, which cause severe damage to biological systems through processes such as DNA double/single-strand fragmentation, protein modification, and upregulation of lipid peroxidation pathways. In addition, radiation damages genetic material while inducing hereditary genotoxicity. Developing measures to counter radiation-induced damage is thus considered to be of significant importance. Considering the inherent capability of plants to survive radiative conditions, certain plants and natural compounds have been the subject of investigations to explore and harness their natural radioprotective abilities. Podophyllum hexandrum, an Indian medicinal plant with several known traditional phytotherapeutic uses, is considered in particular to be of immense therapeutic importance. Recent studies have been conducted to validate its radioprotective potential alongside discovering its protective mechanisms following γ-radiation-induced mortality and disorder in both mice and human cells. These findings show that Podophyllum and its constituents/natural compounds protect the lungs, gastrointestinal tissues, hemopoietic system, and testis by inducing DNA repair pathways, apoptosis inhibition, free radical scavenging, metal chelation, anti-oxidation and anti-inflammatory mechanisms. In this review, we have provided an updated, comprehensive summary of ionizing radiations and their impacts on biological systems, highlighting the mechanistic and radioprotective role of natural compounds from Podophyllum hexandrum.


Assuntos
Berberidaceae , Extratos Vegetais/farmacologia , Protetores contra Radiação/farmacologia , Animais , Anti-Inflamatórios/farmacologia , Antioxidantes/farmacologia , Apoptose/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Quelantes/farmacologia , Reparo do DNA/efeitos dos fármacos , Sequestradores de Radicais Livres/metabolismo , Dose Máxima Tolerável , Medicina Tradicional , Mitocôndrias/efeitos dos fármacos , Protetores contra Radiação/química
9.
Cells ; 10(12)2021 11 24.
Artigo em Inglês | MEDLINE | ID: mdl-34943795

RESUMO

Hyperactivation of immune responses resulting in excessive release of pro-inflammatory mediators in alveoli/lung structures is the principal pathological feature of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The cytokine hyperactivation in COVID-19 appears to be similar to those seen in rheumatoid arthritis (RA), an autoimmune disease. Emerging evidence conferred the severity and risk of COVID-19 to RA patients. Amid the evidence of musculoskeletal manifestations involving immune-inflammation-dependent mechanisms and cases of arthralgia and/or myalgia in COVID-19, crosstalk between COVID-19 and RA is often debated. The present article sheds light on the pathological crosstalk between COVID-19 and RA, the risk of RA patients in acquiring SARS-CoV-2 infection, and the aspects of SARS-CoV-2 infection in RA development. We also conferred whether RA can exacerbate COVID-19 outcomes based on available clinical readouts. The mechanistic overlapping in immune-inflammatory features in both COVID-19 and RA was discussed. We showed the emerging links of angiotensin-converting enzyme (ACE)-dependent and macrophage-mediated pathways in both diseases. Moreover, a detailed review of immediate challenges and key recommendations for anti-rheumatic drugs in the COVID-19 setting was presented for better clinical monitoring and management of RA patients. Taken together, the present article summarizes available knowledge on the emerging COVID-19 and RA crosstalk and their mechanistic overlaps, challenges, and therapeutic options.


Assuntos
Artrite Reumatoide/complicações , Artrite Reumatoide/terapia , COVID-19/complicações , COVID-19/terapia , Animais , COVID-19/virologia , Humanos , Inflamação/patologia , Macrófagos/metabolismo , Modelos Biológicos , SARS-CoV-2/fisiologia
10.
Biomed Pharmacother ; 143: 112175, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34649336

RESUMO

Withania somnifera (L.) Dunal (Solanaceae) has been used as a traditional Rasayana herb for a long time. Traditional uses of this plant indicate its ameliorative properties against a plethora of human medical conditions, viz. hypertension, stress, diabetes, asthma, cancer etc. This review presents a comprehensive summary of the geographical distribution, traditional use, phytochemistry, and pharmacological activities of W. somnifera and its active constituents. In addition, it presents a detailed account of its presence as an active constituent in many commercial preparations with curative properties and health benefits. Clinical studies and toxicological considerations of its extracts and constituents are also elucidated. Comparative analysis of relevant in-vitro, in-vivo, and clinical investigations indicated potent bioactivity of W. somnifera extracts and phytochemicals as anti-cancer, anti-inflammatory, apoptotic, immunomodulatory, antimicrobial, anti-diabetic, hepatoprotective, hypoglycaemic, hypolipidemic, cardio-protective and spermatogenic agents. W. somnifera was found to be especially active against many neurological and psychological conditions like Parkinson's disease, Alzheimer's disease, Huntington's disease, ischemic stroke, sleep deprivation, amyotrophic lateral sclerosis, attention deficit hyperactivity disorder, bipolar disorder, anxiety, depression, schizophrenia and obsessive-compulsive disorder. The probable mechanism of action that imparts the pharmacological potential has also been explored. However, in-depth studies are needed on the clinical use of W. somnifera against human diseases. Besides, detailed toxicological analysis is also to be performed for its safe and efficacious use in preclinical and clinical studies and as a health-promoting herb.


Assuntos
Etnofarmacologia , Compostos Fitoquímicos/farmacologia , Extratos Vegetais/farmacologia , Withania , Animais , Antivirais/isolamento & purificação , Antivirais/farmacologia , COVID-19/virologia , Humanos , Fármacos Neuroprotetores/isolamento & purificação , Fármacos Neuroprotetores/farmacologia , Fármacos Neuroprotetores/toxicidade , Segurança do Paciente , Compostos Fitoquímicos/isolamento & purificação , Compostos Fitoquímicos/toxicidade , Extratos Vegetais/isolamento & purificação , Extratos Vegetais/toxicidade , Raízes de Plantas , Psicotrópicos/isolamento & purificação , Psicotrópicos/farmacologia , Psicotrópicos/toxicidade , Medição de Risco , SARS-CoV-2/efeitos dos fármacos , SARS-CoV-2/patogenicidade , Withania/química , Tratamento Farmacológico da COVID-19
11.
Cells ; 10(10)2021 10 18.
Artigo em Inglês | MEDLINE | ID: mdl-34685770

RESUMO

Alzheimer's disease (AD) is one of the most prominent neurodegenerative diseases, which impairs cognitive function in afflicted individuals. AD results in gradual decay of neuronal function as a consequence of diverse degenerating events. Several neuroimmune players (such as cytokines and growth factors that are key players in maintaining CNS homeostasis) turn aberrant during crosstalk between the innate and adaptive immunities. This aberrance underlies neuroinflammation and drives neuronal cells toward apoptotic decline. Neuroinflammation involves microglial activation and has been shown to exacerbate AD. This review attempted to elucidate the role of cytokines, growth factors, and associated mechanisms implicated in the course of AD, especially with neuroinflammation. We also evaluated the propensities and specific mechanism(s) of cytokines and growth factors impacting neuron upon apoptotic decline and further shed light on the availability and accessibility of cytokines across the blood-brain barrier and choroid plexus in AD pathophysiology. The pathogenic and the protective roles of macrophage migration and inhibitory factors, neurotrophic factors, hematopoietic-related growth factors, TAU phosphorylation, advanced glycation end products, complement system, and glial cells in AD and neuropsychiatric pathology were also discussed. Taken together, the emerging roles of these factors in AD pathology emphasize the importance of building novel strategies for an effective therapeutic/neuropsychiatric management of AD in clinics.


Assuntos
Doença de Alzheimer/metabolismo , Citocinas/metabolismo , Peptídeos e Proteínas de Sinalização Intercelular/metabolismo , Doença de Alzheimer/imunologia , Quimiocinas/metabolismo , Humanos , Inflamação/patologia , Modelos Biológicos
12.
Autoimmun Rev ; 20(11): 102941, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34508917

RESUMO

Although vaccination represents the most promising way to stop or contain the coronavirus disease 2019 (COVID-19) pandemic and safety and effectiveness of available vaccines were proven, a small number of individuals who received anti-SARS-CoV-2 vaccines developed a prothrombotic syndrome. Vaccine-induced immune thrombotic thrombocytopenia (VITT) can be triggered by the adenoviral vector-based vaccine, whereas lipid nanoparticle-mRNA-based vaccines can induce rare cases of deep vein thrombosis (DVT). Although the main pathogenic mechanisms behind this rare phenomenon have not yet been identified, both host and vaccine factors might be involved, with pathology at least in part being related to the vaccine-triggered autoimmune reaction. In this review, we are considering some aspects related to pathogenesis, major risk factors, as well as peculiarities of diagnosis and treatment of this rare condition.


Assuntos
COVID-19 , Coronavírus Relacionado à Síndrome Respiratória Aguda Grave , Vacinas Virais , Autoimunidade , Vacinas contra COVID-19 , Humanos , SARS-CoV-2 , Vacinação/efeitos adversos
13.
Biomolecules ; 11(7)2021 07 13.
Artigo em Inglês | MEDLINE | ID: mdl-34356644

RESUMO

Two adenovirus-based vaccines, ChAdOx1 nCoV-19 and Ad26.COV2.S, and two mRNA-based vaccines, BNT162b2 and mRNA.1273, have been approved by the European Medicines Agency (EMA), and are invaluable in preventing and reducing the incidence of coronavirus disease-2019 (COVID-19). Recent reports have pointed to thrombosis with associated thrombocytopenia as an adverse effect occurring at a low frequency in some individuals after vaccination. The causes of such events may be related to SARS-CoV-2 spike protein interactions with different C-type lectin receptors, heparan sulfate proteoglycans (HSPGs) and the CD147 receptor, or to different soluble splice variants of the spike protein, adenovirus vector interactions with the CD46 receptor or platelet factor 4 antibodies. Similar findings have been reported for several viral diseases after vaccine administration. In addition, immunological mechanisms elicited by viral vectors related to cellular delivery could play a relevant role in individuals with certain genetic backgrounds. Although rare, the potential COVID-19 vaccine-induced immune thrombotic thrombocytopenia (VITT) requires immediate validation, especially in risk groups, such as the elderly, chronic smokers, and individuals with pre-existing incidences of thrombocytopenia; and if necessary, a reformulation of existing vaccines.


Assuntos
Vacinas contra COVID-19/efeitos adversos , COVID-19/prevenção & controle , Trombose/etiologia , Vacina de mRNA-1273 contra 2019-nCoV , Ad26COVS1 , Vacina BNT162 , COVID-19/imunologia , ChAdOx1 nCoV-19 , Humanos , Fatores de Risco , SARS-CoV-2/imunologia , Fumantes , Glicoproteína da Espícula de Coronavírus/imunologia , Trombocitopenia/etiologia , Trombocitopenia/imunologia , Trombose/imunologia , Vacinação/efeitos adversos
14.
Mol Neurobiol ; 58(2): 795-808, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33025510

RESUMO

The escalating burden of type 2 diabetes (T2D) and its related complications has become a major public health challenge worldwide. Substantial evidence indicates that T2D is one of the culprits for the high prevalence of Alzheimer's disease (AD) in diabetic subjects. This study aimed to investigate the possible mitochondrial alterations in the pancreas induced by hyperglycemia in diabetes. We used a diabetic TallyHO/JngJ (TH) and non-diabetic, SWR/J mice strains. The diabetic and non-diabetic status in animals was assessed by performing intraperitoneal glucose tolerance test at four time points, i.e., 4, 8, 16, and 24 weeks of age. We divided 24-week-old TH and SWR/J mice into 3 groups: controls, diabetic TH mice, and diabetic TH mice treated with SS31 peptide. After the treatment of male TH mice with SS31, intraperitoneally, for 4 weeks, we studied mitochondrial dynamics, biogenesis, and function. The mRNA and protein expression levels of mitochondrial proteins were evaluated using qPCR and immunoblot analysis. The diabetic mice after 24 weeks of age showed overt pancreatic injury as demonstrated by disintegration and atrophy of ß cells with vacuolization and reduced islet size. Mitochondrial dysfunction was observed in TH mice, as evidenced by significantly elevated H2O2 production, lipid peroxidation, and reduced ATP production. Furthermore, mRNA expression and immunoblot analysis of mitochondrial dynamics genes were significantly affected in diabetic mice, compared with controls. However, treatment of animals with SS31 reduced mitochondrial dysfunction and restored most of the mitochondrial functions and mitochondrial dynamics processes to near normal in TH mice. In conclusion, mitochondrial dysfunction is established as one of the molecular events that occur in the pathophysiology of T2D. Further, SS31 treatment may confer protection against the mitochondrial alterations induced by hyperglycemia in diabetic TallyHO/JngJ mice.


Assuntos
Diabetes Mellitus Experimental/tratamento farmacológico , Diabetes Mellitus Experimental/imunologia , Mitocôndrias/metabolismo , Dinâmica Mitocondrial , Oligopeptídeos/uso terapêutico , Trifosfato de Adenosina/metabolismo , Animais , Glicemia/metabolismo , Peso Corporal , Diabetes Mellitus Experimental/sangue , Diabetes Mellitus Experimental/genética , Jejum/sangue , Feminino , Teste de Tolerância a Glucose , Hiperglicemia/sangue , Hiperglicemia/complicações , Hiperglicemia/genética , Hiperglicemia/patologia , Resistência à Insulina , Peroxidação de Lipídeos/efeitos dos fármacos , Masculino , Camundongos , Mitocôndrias/efeitos dos fármacos , Dinâmica Mitocondrial/efeitos dos fármacos , Oligopeptídeos/farmacologia , RNA Mensageiro/genética , RNA Mensageiro/metabolismo
15.
Mol Neurobiol ; 57(10): 4106-4116, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32671688

RESUMO

The coronavirus disease of 2019 (COVID-19) is a pandemic disease that has taken the lives of many around the world. It is caused by severe acute respiratory syndrome-corona virus-2 (SARS-CoV-2). To date, the USA, Italy, Spain, France, Russia, and the UK have been hit the hardest by the virus. However, death counts are still rising. Some nations have managed to "flatten" the death rate via protective measures such physical distancing, quarantine measures, and therapeutic management. The structure of the SARS-CoV-2 virus comprises of S proteins, M proteins, E proteins, hemagglutinin esterases, nucleocapsid proteins, and a 30-kb RNA genome. Viral proteases cleave these polyproteins and RNA-dependent polymerases replicate the genome. Currently, there are no effective therapies against this new disease. Numerous investigators are developing novel protease inhibitors, some of which have made it into clinical trials. Researchers are also attempting to develop a vaccine. In this review paper, we discuss the latest therapeutic developments against COVID-19. Graphical Abstract.


Assuntos
Antivirais/uso terapêutico , Infecções por Coronavirus/terapia , Pneumonia Viral/terapia , Inibidores de Proteases/uso terapêutico , Vacinas Virais/uso terapêutico , Betacoronavirus , COVID-19 , Vacinas contra COVID-19 , Infecções por Coronavirus/epidemiologia , Infecções por Coronavirus/prevenção & controle , Humanos , Pandemias/prevenção & controle , Pneumonia Viral/epidemiologia , SARS-CoV-2
16.
Biochim Biophys Acta Mol Basis Dis ; 1866(10): 165889, 2020 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-32603829

RESUMO

The novel Coronavirus disease of 2019 (nCOV-19) is a viral outbreak noted first in Wuhan, China. This disease is caused by Severe Acute Respiratory Syndrome (SARS) Coronavirus (CoV)-2. In the past, other members of the coronavirus family, such as SARS and Middle East Respiratory Syndrome (MERS), have made an impact in China and the Arabian peninsula respectively. Both SARS and COVID-19 share similar symptoms such as fever, cough, and difficulty in breathing that can become fatal in later stages. However, SARS and MERS infections were epidemic diseases constrained to limited regions. By March 2020 the SARS-CoV-2 had spread across the globe and on March 11th, 2020 the World Health Organization (WHO) declared COVID-19 as pandemic disease. In severe SARS-CoV-2 infection, many patients succumbed to pneumonia. Higher rates of deaths were seen in older patients who had co-morbidities such as diabetes mellitus, hypertension, cardiovascular disease (CVD), and dementia. In this review paper, we discuss the effect of SARS-CoV-2 on CNS diseases, such as Alzheimer's-like dementia, and diabetes mellitus. We also focus on the virus genome, pathophysiology, theranostics, and autophagy mechanisms. We will assess the multiorgan failure reported in advanced stages of SARS-CoV-2 infection. Our paper will provide mechanistic clues and therapeutic targets for physicians and investigators to combat COVID-19.


Assuntos
Doenças do Sistema Nervoso Central/patologia , Infecções por Coronavirus/patologia , Pneumonia Viral/patologia , Animais , Antivirais/uso terapêutico , Betacoronavirus/isolamento & purificação , Betacoronavirus/metabolismo , Betacoronavirus/patogenicidade , COVID-19 , Doenças do Sistema Nervoso Central/complicações , Doenças do Sistema Nervoso Central/virologia , Infecções por Coronavirus/tratamento farmacológico , Infecções por Coronavirus/virologia , Humanos , Pulmão/metabolismo , Pulmão/virologia , Pandemias , Pneumonia Viral/tratamento farmacológico , Pneumonia Viral/virologia , SARS-CoV-2 , Proteínas do Envelope Viral/antagonistas & inibidores , Proteínas do Envelope Viral/metabolismo , Proteínas Virais de Fusão/antagonistas & inibidores , Proteínas Virais de Fusão/metabolismo , Proteínas não Estruturais Virais/antagonistas & inibidores , Proteínas não Estruturais Virais/metabolismo
17.
Hum Mol Genet ; 28(2): 177-199, 2019 01 15.
Artigo em Inglês | MEDLINE | ID: mdl-30239719

RESUMO

The purpose of our study was to better understand the effects of mitochondrial-division inhibitor 1 (Mdivi-1) on mitochondrial fission, mitochondrial biogenesis, electron transport activities and cellular protection. In recent years, researchers have found excessive mitochondrial fragmentation and reduced fusion in a large number of diseases with mitochondrial dysfunction. Therefore, several groups have developed mitochondrial division inhibitors. Among these, Mdivi-1 was extensively studied and was found to reduce dynamin-related protein 1 (Drp1) levels and excessive mitochondrial fission, enhance mitochondrial fusion activity and protect cells. However, a recent study by Bordt et al. (1) questioned earlier findings of the beneficial, inhibiting effects of Mdivi-1. In the current study, we studied the protective effects of Mdivi-1 by studying the following: mRNA and protein levels of electron transport chain (ETC) genes; mitochondrial dynamics and biogenesis genes; enzymatic activities of ETC complexes I, II, III and IV; the mitochondrial network; mitochondrial size & number; Drp1 GTPase enzymatic activity and mitochondrial respiration (1) in N2a cells treated with Mdivi-1, (2) overexpressed with full-length Drp1 + Mdivi-1-treated N2a cells and (3) Drp1 RNA silenced+Mdivi-1-treated N2a cells. We found reduced levels of the fission genes Drp1 and Fis1 levels; increased levels of the fusion genes Mfn1, Mfn2 and Opa1; and the biogenesis genes PGC1α, nuclear respiration factor 1, nuclear respiratory factor 2 and transcription factor A, mitochondrial. Increased levels mRNA and protein levels were found in ETC genes of complexes I, II and IV genes. Immunoblotting data agreed with mRNA changes. Transmission electron microscopy analysis revealed reduced numbers of mitochondria and increased length of mitochondria (1) in N2a cells treated with Mdivi-1, (2) cells overexpressed with full-length Drp1 + Mdivi-1-treated N2a cells and (3) Drp1 RNA silenced+Mdivi-1-treated N2a cells. Immunofluorescence analysis revealed that mitochondrial network was increased. Increased levels of complex I, II and IV enzymatic activities were found in all three groups of cells treated with low concentration of Mdivi-1. Mitochondrial function was increased and GTPase Drp1 activity was decreased in all three groups of N2a cells. These observations strongly suggest that Mdivi-1 is a Drp1 inhibitor and directly reduces mitochondrial fragmentation and further, Mdivi-1 is a promising molecule to treat human diseases with ETC complexes, I, II and IV.


Assuntos
GTP Fosfo-Hidrolases/metabolismo , Proteínas Associadas aos Microtúbulos/metabolismo , Mitocôndrias/efeitos dos fármacos , Dinâmica Mitocondrial/efeitos dos fármacos , Proteínas Mitocondriais/metabolismo , Quinazolinonas/farmacologia , Animais , Linhagem Celular Tumoral , Dinaminas , Transporte de Elétrons/efeitos dos fármacos , Transporte de Elétrons/genética , Humanos , Immunoblotting , Camundongos , Mitocôndrias/metabolismo , Dinâmica Mitocondrial/genética , Biogênese de Organelas , Fosforilação , Interferência de RNA , RNA Mensageiro/metabolismo , Transfecção
18.
Cancers (Basel) ; 10(11)2018 Nov 21.
Artigo em Inglês | MEDLINE | ID: mdl-30469457

RESUMO

Liquid crystals are defined as the fourth state of matter forming between solid and liquid states. Earlier the applications of liquid crystals were confined to electronic instruments, but recent research findings suggest multiple applications of liquid crystals in biology and medicine. Here, the purpose of this review article is to discuss the potential biological impacts of liquid crystals in the diagnosis and prognosis of cancer along with the risk assessment. In this review, we also discussed the recent advances of liquid crystals in cancer biomarker detection and treatment in multiple cell line models. Cases reviewed here will demonstrate that cancer diagnostics based on the multidisciplinary technology and intriguingly utilization of liquid crystals may become an alternative to regular cancer detection methodologies. Additionally, we discussed the formidable challenges and problems in applying liquid crystal technologies. Solving these problems will require great effort and the way forward is through the multidisciplinary collaboration of physicists, biologists, chemists, material-scientists, clinicians, and engineers. The triumphant outcome of these liquid crystals and their applications in cancer research would be convenient testing for the detection of cancer and may result in treating the cancer patients non-invasively.

19.
J Alzheimers Dis ; 61(3): 843-866, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29332042

RESUMO

The purpose of our article is to assess the current understanding of Indian spice, curcumin, against amyloid-ß (Aß)-induced toxicity in Alzheimer's disease (AD) pathogenesis. Natural products, such as ginger, curcumin, and gingko biloba have been used as diets and dietary supplements to treat human diseases, including cancer, cardiovascular, respiratory, infectious, diabetes, obesity, metabolic syndromes, and neurological disorders. Products derived from plants are known to have protective effects, including anti-inflammatory, antioxidant, anti-arthritis, pro-healing, and boosting memory cognitive functions. In the last decade, several groups have designed and synthesized curcumin and its derivatives and extensively tested using cell and mouse models of AD. Recent research on Aß and curcumin has revealed that curcumin prevents Aß aggregation and crosses the blood-brain barrier, reach brain cells, and protect neurons from various toxic insults of aging and Aß in humans. Recent research has also reported that curcumin ameliorates cognitive decline and improves synaptic functions in mouse models of AD. Further, recent groups have initiated studies on elderly individuals and patients with AD and the outcome of these studies is currently being assessed. This article highlights the beneficial effects of curcumin on AD. This article also critically assesses the current limitations of curcumin's bioavailability and urgent need for new formulations to increase its brain levels to treat patients with AD.


Assuntos
Doença de Alzheimer/tratamento farmacológico , Barreira Hematoencefálica/efeitos dos fármacos , Curcumina/farmacologia , Fármacos Neuroprotetores/farmacologia , Doença de Alzheimer/patologia , Peptídeos beta-Amiloides/toxicidade , Animais , Barreira Hematoencefálica/metabolismo , Modelos Animais de Doenças , Humanos , Camundongos , Ensaios Clínicos Controlados Aleatórios como Assunto , Especiarias
20.
Sci Rep ; 7: 45211, 2017 03 27.
Artigo em Inglês | MEDLINE | ID: mdl-28345598

RESUMO

The present study, we design and synthesize the novel dihydropyridine derivatives, i.e., 3 (a-e) and 5 (a-e) and evaluated, anticonvulsant activity. Initially due to the lacuna of LCC, we modeled the protein through modeller 9.15v and evaluated through servers. Docking studies were performed with the synthesized compounds and resulted two best compounds, i.e., 5a, 5e showed the best binding energies. The activity of intracellular Ca2+ measurements was performed on two cell lines: A7r5 (rat aortic smooth muscle cells) and SH-SY5Y (human neuroblastoma cells). The 5a and 5e compounds was showing the more specific activity on L-type calcium channels, i.e. A7r5 (IC50 = 0.18 ± 0.02 and 0.25 ± 0.63 µg/ml, respectively) (containing only L-type channels) than SH-SY5Y (i.e. both L-type and T-type channels) (IC50 = 8 ± 0.23 and 10 ± 0.18 µg/ml, respectively) with intracellular calcium mobility similar to amlodipine. Finally, both in silico and in vitro results exploring two derivatives 5a and 5e succeeded to treat cadmium toxicity.


Assuntos
Anticonvulsivantes/síntese química , Cádmio/toxicidade , Canais de Cálcio Tipo L/química , Cálcio/metabolismo , Di-Hidropiridinas/síntese química , Animais , Anticonvulsivantes/química , Anticonvulsivantes/farmacologia , Apoptose/efeitos dos fármacos , Domínio Catalítico , Linhagem Celular , Di-Hidropiridinas/química , Di-Hidropiridinas/farmacologia , Humanos , Modelos Moleculares , Simulação de Acoplamento Molecular , Ratos , Homologia Estrutural de Proteína
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