Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 25
Filter
Add more filters










Publication year range
1.
Oncol Lett ; 21(4): 258, 2021 Apr.
Article in English | MEDLINE | ID: mdl-33664821

ABSTRACT

Approximately 85% of lung cancer cases are recognized as non-small cell lung cancer (NSCLC) with a perilous (13-17%) 5-year survival in Europe and the USA. Although tobacco smoking has consistently emerged as the leading cause of NSCLC complications, its consequences are distinctly manifest with respect to sex bias, due to differential gene and sex hormone expression. Estrogen related receptor α (ERRα), a member of the nuclear orphan receptor superfamily is normally expressed in the lungs, and activates various nuclear genes without binding to the ligands, such as estrogens. In NSCLC ERRα expression is significantly higher compared with healthy individuals. It is well established ERα and ERß' have 93% and 60% identity in the DNA and ligand binding domains, respectively. ERα and ERRα have 69% (70% with ERRα-1) and 34% (35% with ERRα-1) identity, respectively; ERRα and ERRß' have 92 and 61% identity, respectively. However, whether there is distinctive ERRα interaction with mammalian estrogens or concurrent involvement in non-ER signalling pathway activation is not known. Relevant to NSCLC, ERRα promotes proliferation, invasion and migration by silencing the tumor suppressor proteins p53 and pRB, and accelerates G2-M transition during cell division. Epithelial to mesenchymal transition (EMT) and activation of Slug (an EMT associated transcription factor) are the prominent mechanisms by which ERRα activates NSCLC metastasis. Based on these observations, the present article focuses on the feasibility of antiERRα therapy alone and in combination with antiER as a therapeutic strategy for NSCLC complications.

2.
Curr Oncol Rep ; 23(1): 12, 2021 01 05.
Article in English | MEDLINE | ID: mdl-33399986

ABSTRACT

PURPOSE OF REVIEW: Non-small cell lung cancers (NSCLCs) account for ~ 85% of all lung cancers, and 5-year survival in Europe and the USA is ~ 13-17%. In this review, we focus on the significance of Receptor for Advanced Glycation End products (RAGE) as a diagnostic or post-therapeutic prognostic marker for various forms of NSCLCs. RECENT FINDINGS: The lungs have the highest levels of basal RAGE expression in mammals. The physiologic RAGE in lungs may be involved in adhesion and spreading of AT-1 cells and maintenance of pulmonary homeostasis. However, high level expression of RAGE complicates various diseases including acute lung injury. In NSCLCs, while a number of studies report decreased RAGE expression, inferring a protective role, others suggest that RAGE expression may contribute to NSCLC pathogenesis. Genetic polymorphisms of RAGE are reportedly associated with NSCLC development and complications. RAGE and its polymorphic variants may be useful diagnostic or post-therapeutic prognostic markers of NSCLCs.


Subject(s)
Biomarkers, Tumor , Carcinoma, Non-Small-Cell Lung , Lung Neoplasms , Receptor for Advanced Glycation End Products , Biomarkers, Tumor/genetics , Biomarkers, Tumor/metabolism , Carcinoma, Non-Small-Cell Lung/diagnosis , Carcinoma, Non-Small-Cell Lung/genetics , Carcinoma, Non-Small-Cell Lung/metabolism , Humans , Lung Neoplasms/diagnosis , Lung Neoplasms/genetics , Lung Neoplasms/metabolism , Polymorphism, Genetic , Prognosis , Receptor for Advanced Glycation End Products/genetics , Receptor for Advanced Glycation End Products/metabolism
3.
Curr Med Chem ; 28(16): 3061-3106, 2021.
Article in English | MEDLINE | ID: mdl-32838707

ABSTRACT

Characterized by the abysmal 18% five year survival chances, non-small cell lung cancers (NSCLCs) claim more than half of their sufferers within the first year of being diagnosed. Advances in biomedical engineering and molecular characterization have reduced the NSCLC diagnosis via timid screening of altered gene expressions and impaired cellular responses. While targeted chemotherapy remains a major option for NSCLCs complications, delayed diagnosis, and concurrent multi-drug resistance remain potent hurdles in regaining normalcy, ultimately resulting in relapse. Curcumin administration presents a benign resolve herein, via simultaneous interception of distinctly expressed pathological markers through its pleiotropic attributes and enhanced tumor cell internalization of chemotherapeutic drugs. Studies on NSCLC cell lines and related xenograft models have revealed a consistent decline in tumor progression owing to enhanced chemotherapeutics cellular internalization via co-delivery with curcumin. This presents an optimum readiness for screening the corresponding effectiveness in clinical subjects. Curcumin is delivered to NSCLC cells either (i) alone, (ii) in stoichiometrically optimal combination with chemotherapeutic drugs, (iii) through nanocarriers, and (iv) nanocarrier co-delivered curcumin and chemotherapeutic drugs. Nanocarriers protect the encapsulated drug from accidental and non-specific spillage. A unanimous trait of all nanocarriers is their moderate drug-interactions, whereby native structural expressions are not tampered. With such insights, this article focuses on the implicit NSCLC curative mechanisms viz-a-viz, free curcumin, nanocarrier delivered curcumin, curcumin + chemotherapeutic drug and nanocarrier assisted curcumin + chemotherapeutic drug delivery.


Subject(s)
Carcinoma, Non-Small-Cell Lung , Curcumin , Lung Neoplasms , Carcinoma, Non-Small-Cell Lung/drug therapy , Cell Line, Tumor , Curcumin/therapeutic use , Humans , Lung Neoplasms/drug therapy , Neoplasm Recurrence, Local
4.
Int J Pharm ; 553(1-2): 483-509, 2018 Dec 20.
Article in English | MEDLINE | ID: mdl-30394284

ABSTRACT

In recent years, gold (Au) and silver (Ag) nanoparticles (NPs) have been the centerstage of improving cancer treatments and therapies, substantially attributed to their size and shape tuneable chemical, optical and photonic properties. Owing to such specialties, diverse shapes of Au and Ag NPs have enabled an efficient cellular uptake along with remarkable improvements in early stage diagnosis of tumors. Robust synthesis methods employing several reducing agents have been the backbone of such enormous strides of Au and Ag NPs, allowing the delivery of much lower drug volumes to minimize the patient sensitization. Probes based on Au and Ag NPs functionalization with biocompatible chemical molecules have substantially improved their in vivo tracking and mediating a site-specific binding leading to improved cancer treatment with minimal risks to normal cells. With a better drug delivery potential of non-spherical shapes, the cylindrical (rod shaped) geometries have recently been investigated to possess higher cellular uptake. The rod shaped surface morphology enables a larger area for drug binding with enhanced possibility to make use of photothermal attributes. The interplay of size and shape dependent biologic activities is regulated by physicochemical changes in the tumor microenvironment, where stable drug-carrier binding is facilitated by surface modification of NPs, through moderate interactive forces ensuring minimal changes in native drug structure. The energy savvy greener methods, like microwave and microemulsions have enabled much better control on the synthesized nanoparticle shapes and geometries, through a regulation of precursor to reducing agent stoichiometries. With this viewpoint, this article focuses on most common synthesis methods of Au and Ag NPs alongside their application in more effective treatment of lung and breast cancers.


Subject(s)
Antineoplastic Agents/administration & dosage , Drug Delivery Systems , Metal Nanoparticles , Animals , Breast Neoplasms/diagnosis , Breast Neoplasms/drug therapy , Breast Neoplasms/pathology , Drug Design , Female , Gold/chemistry , Humans , Lung Neoplasms/diagnosis , Lung Neoplasms/drug therapy , Lung Neoplasms/pathology , Particle Size , Silver/chemistry , Tumor Microenvironment
5.
J Funct Foods ; 30: 203-219, 2017 Mar.
Article in English | MEDLINE | ID: mdl-32288791

ABSTRACT

The consumption of diet-based naturally bioactive metabolites is preferred to synthetic material in order to avert health-associated disorders. Among the plant-derived polyphenols, kaempferol (KMF) is considered as a valuable functional food ingredient with a broad range of therapeutic applications such as anti-cancer, antioxidant and anti-inflammatory uses. KMF acts on a range of intracellular as well as extracellular targets involved in the cell signaling pathways that in turn are known to regulate the hallmarks of cancer growth progressions like apoptosis, cell cycle, invasion or metastasis, angiogenesis and inflammation. Importantly, the understanding of mechanisms of action of KMF-mediated therapeutic effects may help the scientific community to design novel strategies for the treatment of dreadful diseases. The current review summarizes the various types of molecular targets of KMF in cancer cells as well as other health-associated disorders. In addition, this review also highlights the absorption, metabolism and epidemiological findings.

6.
Life Sci ; 169: 27-36, 2017 Jan 15.
Article in English | MEDLINE | ID: mdl-27871947

ABSTRACT

For several decades, bioactive phytochemicals have been appreciated to prevent and cure various lethal diseases. Many studies have proven the ability of dietary phytochemicals to avoid and retard tumor initiation and progression. Among the pharmacologically active moieties, terpenoids are considered one of the most important classes. Carnosol, is also a kind of diterpenoid, which known to possess a range of therapeutic effects such as anti-cancer, anti-inflammatory, and anti-oxidant activities. All these effects are mediated via modulating different signaling cascades, including apoptosis regulating molecules (Bax/Bcl2), prosurvival-proproliferative molecules (Akt/mTOR, MAPK), transcription factors like NF-kappaB, STAT3-6, and steroid receptors, such as androgen and estrogen receptors. The present review highlights the recent trends and advancements have been done in the field of research by using carnosol.


Subject(s)
Abietanes/pharmacology , Anti-Inflammatory Agents/pharmacology , Antineoplastic Agents, Phytogenic/pharmacology , Antioxidants/pharmacology , Abietanes/chemistry , Abietanes/therapeutic use , Angiogenesis Inhibitors/chemistry , Angiogenesis Inhibitors/pharmacology , Angiogenesis Inhibitors/therapeutic use , Animals , Anti-Inflammatory Agents/chemistry , Anti-Inflammatory Agents/therapeutic use , Antineoplastic Agents, Phytogenic/chemistry , Antineoplastic Agents, Phytogenic/therapeutic use , Antioxidants/chemistry , Antioxidants/therapeutic use , Apoptosis/drug effects , Cell Proliferation/drug effects , Humans , Neoplasm Metastasis/prevention & control , Neoplasms/drug therapy , Neoplasms/metabolism , Rosmarinus/chemistry , Signal Transduction/drug effects
7.
Biochem Biophys Res Commun ; 477(4): 575-580, 2016 09 02.
Article in English | MEDLINE | ID: mdl-27346132

ABSTRACT

We report that arsenic trioxide (ATO) and 17-beta-estradiol (E2) abolish each other's independent cell signaling effects in respect of cell survival and proliferation/migration of breast cancer (MCF-7) cells. The possibility that this is due to binding of ATO to E2 was confirmed through difference absorption spectroscopy, chromatography-coupled voltammometry and 1-D (1)H and (13)C NMR spectroscopy. Binding leads to attenuation of E2's hydroxyl (1)H peaks at its C17 and C3 carbon positions. The results suggest that ATO and E2 can titrate each other's levels, potentially explaining why sustained arsenic exposure tends to be associated with delays in age of menarche, advanced age of menopause, poorer sperm quality, higher overall morbidity in men, and lower incidences of breast cancer in women in some arsenic-contaminated areas.


Subject(s)
Arsenic/metabolism , Estradiol/metabolism , Signal Transduction , Binding Sites , Carbon-13 Magnetic Resonance Spectroscopy , Humans , MCF-7 Cells , Proton Magnetic Resonance Spectroscopy , Spectrum Analysis/methods , Wound Healing
8.
Biochim Biophys Acta ; 1850(9): 1898-904, 2015 Sep.
Article in English | MEDLINE | ID: mdl-26028296

ABSTRACT

BACKGROUND: Receptor for advanced glycation end-products popularly known as RAGE is a cell surface immunoglobulin class of molecule, binds with multiple ligands and therefore considered as a multi-ligand receptor. Use of RAGE deficient mice (RAGE(-/-)) as well as established mouse models pertaining to inflammation-associated carcinogenesis such as that of chemically induced carcinogenesis and colitis associated cancer provides a direct genetic evidence for a likelihood novel role of RAGE in cancer, with respect to its ability to lead cancer cell proliferation and survival. Besides inflammation, interaction of RAGE with its various ligands enhances oxidative stress both in cancerous and noncancerous cells which further complicates the progression of cancers. SCOPE OF REVIEW: Till date, no single review article has discussed the mechanism of RAGE dependent complication of cancers, particularly the role of RAGE in cancer cell proliferation, angiogenesis, survival and anti-apoptosis needs to be discussed. MAJOR CONCLUSION: RAGE enhances the number of cancer cells by activating the cell cycle proteins (e.g., cyclin D1), anti-apoptotic proteins (e.g., BCl2), prosurvival (AKT) and autophagic proteins. Role of RAGE has also been detected in formation of new blood vessels (angiogenesis) in the cancer cells and activation of myeloid derived suppressor cells (MDSCs). GENERAL SIGNIFICANCE: This review article describes the role of RAGE in the complication of various types of cancers and the possible usefulness of RAGE dependent therapy to confront cancers in a stronger magnitude.


Subject(s)
Neoplasms/complications , Receptors, Immunologic/physiology , Animals , Apoptosis , Cell Proliferation , Cell Survival , Glycation End Products, Advanced/antagonists & inhibitors , Glycation End Products, Advanced/physiology , Humans , Mice , Neoplasm Invasiveness , Receptor for Advanced Glycation End Products
9.
Anticancer Agents Med Chem ; 16(2): 190-9, 2015.
Article in English | MEDLINE | ID: mdl-25980816

ABSTRACT

ROS have vital roles in cellular signaling and homeostasis. At low concentration, ROS promotes cancer cell survival by the activation of growth factors and MAP-kinases (MAPKs) that further activates cell cycle progression. At high concentration, ROS produces oxidative stress that activates programmed cell death or apoptosis. However, this fine distinction of ROS action either as a growth promoter or pro-apoptotic agent depends not only on dosage (concentration) but also on the duration, type, and site of ROS generation. The female steroid estrogens and their various metabolites generate ROS in the breast cancer cells. Slow, sustained and moderate level of ROS generated by estrogens and their metabolites cause initiation and progression of breast cancer. ROS generated by estrogens affect pro-proliferative (e.g. cyclin D1, Cdc2), prosurvival (e.g. AKT), antiapoptotic (e.g. BCl2) and pro-inflammatory (e.g. NF-κB) molecules. These multipronged actions of ROS lead to the activation of several signaling pathways involved in the breast cancer cell survival and proliferation, resulting in the progression of breast cancer. Present review article provides insights into the role of estrogen generated ROS and its associated signaling pathways in the initiation and progression of breast cancer. The importance of ROS as breast cancer drug target has also been discussed.


Subject(s)
Breast Neoplasms/complications , Breast Neoplasms/metabolism , Estrogens/metabolism , Reactive Oxygen Species/metabolism , Animals , Breast Neoplasms/pathology , Cell Cycle , Cell Death , Cell Survival , Female , Humans , Oxidative Stress
10.
Curr Pharm Biotechnol ; 15(12): 1141-57, 2014.
Article in English | MEDLINE | ID: mdl-25429654

ABSTRACT

Estrogens along with their receptors are required for the normal physiological development of women. However, in altered physiological conditions a high level of estrogens acts either as initiator or progressor of breast cancer. Approximately in 75% of estrogen dependent breast cancer cases estrogen receptors (ERs) are held responsible. Recent studies indicate that estrogens along with iron (Fe) concomitantly involved in the proliferation of ER(+) breast cancer cells. While a number of antiestrogen/anti-ER drugs including selective estrogen receptor modulators (SERMs), aromatase inhibitors (AIs) and selective estrogen receptor down regulators (SERDs) are used to eradicate breast cancer but their action on Fe dependent breast cancer complication is not yet explored. Moreover, many of the ER(+) breast cancer patients receiving anti-estrogen drugs relapsed within a couple of years and become resistant to antiestrogen therapy. Mutation and loss of affinity to the target molecule (ERs), loss or overexpression of ERs, along with activation of growth promoting pathways alternative to estrogen-ER pathways are the major reasons of drug resistance. Combinational therapy may be best alternative to antiestrogen relapsed patients. Some of the widely studied drug combinations are roscovitine (ROSC) and tamoxifen, metformin and tamoxifen, tamoxifen and RAD001. While in all these drug combinations anti-ER compound tamoxifen may be one of the major content, anti-Fe compounds are yet to be used as drug combination. The present review article describes all the currently studied drugs/drug combinations in ER(+) breast cancer cells and future drug possibilities including anti-Fe compounds.


Subject(s)
Breast Neoplasms/metabolism , Drug Resistance, Neoplasm/physiology , Iron/metabolism , Receptors, Estrogen/metabolism , Animals , Antineoplastic Agents/therapeutic use , Breast Neoplasms/drug therapy , Drug Resistance, Neoplasm/drug effects , Drug Therapy, Combination , Estrogens/metabolism , Female , Flavonoids/therapeutic use , Humans , Iron Chelating Agents/therapeutic use
11.
Respirology ; 19(4): 508-13, 2014 May.
Article in English | MEDLINE | ID: mdl-24689994

ABSTRACT

Intercellular adhesion molecule-1 (ICAM-1) is a transmembrane glycoprotein receptor of the immunoglobulin superfamily. Endothelial cells, epithelial cells, leukocytes and neutrophils are the major cells expressing ICAM-1. Ligands of ICAM-1 are macrophage adhesion ligand-1, leukocyte function-associated antigen-1 and fibrinogen (extracellular matrix protein). In normal physiological conditions, engagement of ICAM-1 receptor with immunological cells surface ligands assists in homing and trafficking of inflammatory cells to distant tissues. ICAM-1 has also long been known to mediate cell-to-cell interaction during antigen presentation and outside-in cell signalling pathways. ICAM-1-mediated elevated inflammation is implicated in asthma. On respiratory epithelial cells surface, ICAM-1 acts as natural binding site for human rhinovirus (HRV), a common cold virus that ultimately causes exacerbation of asthma. This review presents the findings on the role of ICAM-1 in the complication of asthma and in particular asthma exacerbation by HRV.


Subject(s)
Asthma , Cell Adhesion Molecules/antagonists & inhibitors , Cell Communication , Common Cold/complications , Immunologic Factors/pharmacology , Intercellular Adhesion Molecule-1/immunology , Rhinitis , Asthma/drug therapy , Asthma/etiology , Asthma/immunology , Cell Communication/drug effects , Cell Communication/immunology , Common Cold/immunology , Common Cold/virology , Humans , Molecular Targeted Therapy , Respiratory Mucosa/metabolism , Rhinitis/drug therapy , Rhinitis/etiology , Rhinitis/immunology , Rhinovirus/pathogenicity
12.
Biochim Biophys Acta ; 1840(3): 1083-91, 2014 Mar.
Article in English | MEDLINE | ID: mdl-24252278

ABSTRACT

BACKGROUND: 17α-ethinyl-estradiol (17α-EE), a synthetic estrogen is the world's most widely and commonly used orally bioactive estrogen. Currently, 17α-EE is in use in all formulations of contraceptive pills and is implicated in the complication of breast cancer. Receptor for advanced glycation end products (RAGE) is a cell surface immunoglobulin class of molecule. RAGE is involved in the complication of various cancers. METHODS AND RESULTS: This study indicates that treatment of MCF-7 breast cancer cells with 17α-EE enhances the expression of estrogen receptor related receptor gamma (ERRγ), followed by enhanced level of oxidative stress and subsequent activation of the transcription factor, nuclear factor kappa-B (NF-кB), leading to increase in RAGE expression. RAGE thus expressed by 17α-EE treatment causes further enhancement of the oxidative stress which, in turn, activates expression of cell cycle protein cyclin D1 and subsequent induction of MCF-7 breast cancer cell proliferation. RAGE also enhanced phosphorylation of prosurvival protein AKT and increased expression of Bcl2, an antiapoptotic protein. CONCLUSION: In MCF-7 breast cancer cells, 17α-EE-ERRγ interaction induces the expression of RAGE, which in turn, enhances the number of MCF-7 breast cancer cells through a multiprong action on the divergent molecules like cyclin D1, AKT and Bcl2. GENERAL SIGNIFICANCE: This is the first report which explains the intermediate role of ERRγ in the 17α-EE dependent RAGE expression in MCF-7 breast cancer cells. This report for the first time explains that RAGE is important not only for MCF-7 breast cancer cell proliferation but also for its survival and anti-apoptotic activities.


Subject(s)
Ethinyl Estradiol/pharmacology , Receptors, Immunologic/physiology , Cell Proliferation , Cell Survival , Cyclin D1/analysis , Female , Humans , MCF-7 Cells , NF-kappa B/physiology , Phosphorylation , Proto-Oncogene Proteins c-akt/metabolism , Proto-Oncogene Proteins c-bcl-2/analysis , Reactive Oxygen Species/metabolism , Receptor for Advanced Glycation End Products , Receptors, Estrogen/physiology
13.
Trans R Soc Trop Med Hyg ; 107(3): 147-51, 2013 Mar.
Article in English | MEDLINE | ID: mdl-23423340

ABSTRACT

BACKGROUND: Two long sewerage canals in the city of Kolkata, India were heavily infested with larvae, pupae and egg rafts of the mosquito Culex quinquefasciatus. Although the burden of bancroftian filariasis and other diseases transmitted by C. quinquefasciatus in the city is practically zero, the night-biting mosquitoes are a great nuisance to residents living alongside the canals. It is known that mosquitoes survive poorly in water agitated by wave and wind action. METHOD: The health department of Kolkata Municipal Corporation undertook, from November 2010 to April 2012, a programme of plying speedboats along the canals to prevent C. quinquefasciatus breeding. At the same time, along stretches of canal too shallow to permit the use of speedboats and where the canal banks are inaccessible to spraymen, the edges were treated with larvicidal spray, Temephos 50% EC (emulsifiable concentrate), using small rowing boats as transport. RESULT: The densities of egg rafts and immature and adult insects declined dramatically when the speedboats were deployed and remained low for the duration of the project. For Feburary, the peak month for C. quinquefasciatus breeding, densities for egg rafts, larvae, pupae and adults, respectively, declined from 800, 2942, 1457 and 662 to 3, 75, 15 and 27. The cost was comparable to that of using larvicidal spray where this required the use of rowing boats. CONCLUSION: Speedboat-generated waves are effective in preventing the breeding of mosquitoes in otherwise mosquitogenic canals. Where use of boats is an option and use of insecticides is unfeasible or undesirable, the plying of speedboats is a potentially ecofriendly approach to mosquito control.


Subject(s)
Culex , Mosquito Control/methods , Ships , Water/parasitology , Animals , India , Insecticides , Sewage/parasitology , Temefos
14.
Curr Opin Pulm Med ; 19(3): 289-97, 2013 May.
Article in English | MEDLINE | ID: mdl-23429097

ABSTRACT

PURPOSE OF REVIEW: Tuberculosis (TB) has been a most turbulent problem prevailing for the last several decades. The emergence of multidrug-resistant strains and the dearth of anti-TB drugs are threatening the future containment of TB. Nanotechnology presents an exciting opportunity for proper identification of mycobacterial strains and to improve the potential of drugs for the treatment of TB. RECENT FINDINGS: Nanoscience has provided humankind with several unique and comparatively more effective drug delivery carriers, encompassing liposomal-mediated drug delivery, solid lipid nanoparticles, polymeric nanoparticles, dendrimers, nanoemulsions, nanosuspensions and other nanosystems exploiting the extraordinary properties of matter at the nanoscale. Nanoparticle-based assays have shown significant improvements in diagnosis, treatment and prevention of TB. Nanoparticles as drug carriers enable higher stability and carrier capacity along with immense improvement of drug bioavailability which further leads to reduction in dosage frequency. SUMMARY: This review covers the prospect of using nanotechnology for the detection of mycobacterial strains and nanotechnology-based drug delivery systems for effective eradication of mycobacterial infections.


Subject(s)
Antitubercular Agents/administration & dosage , Mycobacterium tuberculosis/drug effects , Nanomedicine/methods , Nanoparticles , Tuberculosis/drug therapy , Biological Availability , Dendrimers , Drug Carriers , Humans , Mycobacterium tuberculosis/classification , Nanomedicine/trends , Tuberculosis/diagnosis
15.
Curr Opin Pulm Med ; 17(4): 286-91, 2011 Jul.
Article in English | MEDLINE | ID: mdl-21537189

ABSTRACT

PURPOSE OF REVIEW: Lung being one of the vital and essential organs in the body, lung cancer is a major cause of mortality in the modern human society. Lung cancer can be broadly subdivided into nonsmall cell lung cancer (NSCLC) and small cell lung cancer (SCLC). Although NSCLC is sometimes treated with surgery, the advanced and metastatic NSCLC and SCLC usually respond better to chemotherapy and radiation. The most important targets of these chemotherapeutic agents are various intracellular signaling molecules. The primary focus of this review article is to summarize the description of various cell signaling molecules involved in lung cancer development and their regulation by chemotherapeutic agents. RECENT FINDINGS: Extensive research work in recent years has identified several cellular signaling molecules that may be intricately involved in the complexity of lung cancer. Some of these cell signaling molecules are epidermal growth factor receptors, vascular endothelial growth factor receptors, mammalian target of rapamycin, mitogen-activated protein kinase phosphatase-1, peroxisome proliferator-activated receptor-gamma, matrix metalloproteinases and receptor for advanced glycation end-products. SUMMARY: The present review will strengthen our current knowledge regarding the efficacy of the above-mentioned cell signaling molecules as potential beneficial drug targets against lung cancer.


Subject(s)
Carcinoma, Non-Small-Cell Lung/metabolism , Carcinoma, Small Cell/metabolism , Lung Neoplasms/metabolism , Molecular Targeted Therapy , Humans , Signal Transduction/drug effects , Signal Transduction/physiology
16.
Biochim Biophys Acta ; 1800(10): 1127-35, 2010 Oct.
Article in English | MEDLINE | ID: mdl-20434525

ABSTRACT

BACKGROUND: Estrogens are steroid hormones responsible for the primary and secondary sexual characteristics in females. While pre-menopausal women use estrogens as the main constituents of contraceptive pills, post-menopausal women use the same for Hormone Replacement Therapy. Estrogens produce reactive oxygen species by increasing mitochondrial activity and redox cycling of estrogen metabolites. The phenolic hydroxyl group present at the C3 position of the A ring of estrogens can get oxidized either by accepting an electron or by losing a proton. Thus, estrogens might act as pro-oxidant in some settings, resulting in complicated non-communicable diseases, namely, cancer and cardiovascular disorders. However, in some other settings the phenolic hydroxyl group of estrogens may be responsible for the anti-oxidative beneficial functions and thus protect against cardiovascular and neurodegenerative diseases. SCOPE OF REVIEW: To date, no single review article has mentioned the implication of estrogen receptors in both the pro-oxidative and anti-oxidative actions of estrogens. MAJOR CONCLUSION: The controversial role of estrogens as pro-oxidant or anti-oxidant is largely dependent on cell types, ratio of different types of estrogen receptors present in a particular cell and context specificity of the estrogen hormone responses. Both pro-oxidant and anti-oxidant effects of estrogens might involve different estrogen receptors that can have either genomic or non-genomic action to manifest further hormonal response. GENERAL SIGNIFICANCE: This review highlights the role of estrogen receptors in the pro-oxidative and anti-oxidative actions of estrogens with special emphasis on neuronal cells.


Subject(s)
Antioxidants/pharmacology , Estrogens/pharmacology , Mitochondria/metabolism , Neurons/metabolism , Oxidants/pharmacology , Animals , Antioxidants/adverse effects , Cardiovascular Diseases/metabolism , Contraceptives, Oral, Hormonal , Estrogen Replacement Therapy , Estrogens/adverse effects , Female , Humans , Male , Neoplasms/metabolism , Neurodegenerative Diseases/metabolism , Organ Specificity/drug effects , Oxidants/adverse effects , Oxidation-Reduction/drug effects , Premenopause/metabolism , Receptors, Estrogen/metabolism
17.
J Chem Phys ; 132(13): 134107, 2010 Apr 07.
Article in English | MEDLINE | ID: mdl-20387921

ABSTRACT

The applicability of Ritz-variational principle for 3dnf ((1,3)D(o)) states lying between N=2 and N=3 ionization threshold of singly ionized helium is discussed in this communication. Probable existence of such a state for O(6+) within the planetary atmosphere in the polar regions of Jupiter is discussed.

18.
Respir Physiol Neurobiol ; 162(3): 210-5, 2008 Aug 31.
Article in English | MEDLINE | ID: mdl-18674642

ABSTRACT

Receptor for advanced glycation end products (RAGE) is a membrane bound receptor and member of the immunoglobulin super family and is normally present in a highly abundant basal level expression in lung. This high expression of RAGE in lung alveolar epithelial type I (ATI) cells is presumably involved in the proliferation and differentiation of pulmonary epithelial cells. However, typically higher than basal level expression of RAGE may indicate the existence of severe pathophysiological condition in lung, e.g. acute lung injury (ALI) and acute respiratory distress syndrome (ARDS). During pulmonary tissue injury an endogenous secretory isoform of RAGE called EsRAGE is noticed at high levels in broncho-alveolar lavage (BAL) and plasma. Recently, a soluble form of RAGE (sRAGE) produced by recombinant gene technology was shown to exhibit a therapeutic potential in experimental animal models. Detailed study of RAGE in the pulmonary tissues will facilitate the understanding of the importance of RAGE signaling in the pulmonary health and pathophysiology.


Subject(s)
Lung Diseases/pathology , Lung Diseases/physiopathology , Lung/metabolism , Receptors, Immunologic/physiology , Humans , Receptor for Advanced Glycation End Products
19.
J Immunol ; 178(3): 1835-44, 2007 Feb 01.
Article in English | MEDLINE | ID: mdl-17237434

ABSTRACT

In endothelial cells, the intracellular level of glutathione is depleted during offering protection against proinflammatory cytokine TNF-alpha-induced oxidative stress. Administration of anti-inflammatory drugs, i.e., N-acetylcysteine (NAC) or mitoquinone-Q (mito-Q) in low concentrations in the human pulmonary aortic endothelial cells offered protection against depletion of reduced glutathione and oxidative stress mediated by TNF-alpha. However, this study addressed that administration of NAC or mito-Q in high concentrations resulted in a biphasic response by initiating an enhanced generation of both reduced glutathione and oxidized glutathione and enhanced production of reactive oxygen species, along with carbonylation and glutathionylation of the cellular proteins. This study further addressed that IkappaB kinase (IKK), a phosphorylation-dependent regulator of NF-kappaB, plays an important regulatory role in the TNF-alpha-mediated induction of the inflammatory cell surface molecule ICAM-1. Of the two catalytic subunits of IKK (IKKalpha and IKKbeta), low concentrations of NAC and mito-Q activated IKKalpha activity, thereby inhibiting the downstream NF-kappaB and ICAM-1 induction by TNF-alpha. High concentrations of NAC and mito-Q instead caused glutathionylation of IKKalpha, thereby inhibiting its activity that in turn enhanced the downstream NF-kappaB activation and ICAM-1 expression by TNF-alpha. Thus, establishing IKKalpha as an anti-inflammatory molecule in endothelial cells is another focus of this study. This is the first report that describes a stressful situation in the endothelial cells created by excess of antioxidative and anti-inflammatory agents NAC and mito-Q, resulting in the generation of reactive oxygen species, carbonylation and glutathionylation of cellular proteins, inhibition of IKKalpha activity, and up-regulation of ICAM-1expression.


Subject(s)
Acetylcysteine/pharmacology , Endothelium, Vascular/drug effects , Glutathione/biosynthesis , I-kappa B Kinase/antagonists & inhibitors , Intercellular Adhesion Molecule-1/genetics , Organophosphorus Compounds/pharmacology , Oxidative Stress/drug effects , Ubiquinone/pharmacology , Anti-Inflammatory Agents/pharmacology , Antioxidants/pharmacology , Aorta , Cells, Cultured , Endothelial Cells/drug effects , Endothelial Cells/pathology , Endothelium, Vascular/pathology , Humans , Reactive Oxygen Species/metabolism , Tumor Necrosis Factor-alpha/pharmacology , Up-Regulation
20.
Respir Res ; 7: 125, 2006 Oct 11.
Article in English | MEDLINE | ID: mdl-17034639

ABSTRACT

Tumor necrosis factor alpha (TNFalpha) is the most widely studied pleiotropic cytokine of the TNF superfamily. In pathophysiological conditions, generation of TNFalpha at high levels leads to the development of inflammatory responses that are hallmarks of many diseases. Of the various pulmonary diseases, TNFalpha is implicated in asthma, chronic bronchitis (CB), chronic obstructive pulmonary disease (COPD), acute lung injury (ALI) and acute respiratory distress syndrome (ARDS). In addition to its underlying role in the inflammatory events, there is increasing evidence for involvement of TNFalpha in the cytotoxicity. Thus, pharmacological agents that can either suppress the production of TNFalpha or block its biological actions may have potential therapeutic value against a wide variety of diseases. Despite some immunological side effects, anti-TNFalpha therapeutic strategies represent an important breakthrough in the treatment of inflammatory diseases and may have a role in pulmonary diseases characterized by inflammation and cell death.


Subject(s)
Inflammation/physiopathology , Lung/physiopathology , Tumor Necrosis Factor-alpha/physiology , Animals , Asthma/pathology , Asthma/physiopathology , Cell Death/physiology , Cytokines/physiology , Homeostasis/physiology , Humans , Inflammation/immunology , Lung/physiology , Lung Injury , Pulmonary Disease, Chronic Obstructive/pathology , Pulmonary Disease, Chronic Obstructive/physiopathology , Respiratory Distress Syndrome/pathology , Respiratory Distress Syndrome/physiopathology , Tumor Necrosis Factor-alpha/antagonists & inhibitors
SELECTION OF CITATIONS
SEARCH DETAIL
...