reihaneh sabbaghzadeh - Academia.edu (original) (raw)
Papers by reihaneh sabbaghzadeh
The empirical force fields have great difficulty in simulating folding of insulin-like growth fac... more The empirical force fields have great difficulty in simulating folding of insulin-like growth factor 1 (IGF-1). In an effort to understand the conformational preferences that may be attributed to stereoelectronic effects, a number of computational studies are carried out. Monte Carlo, molecular dynamics and Langevin simulation methods by MM+, amber and optimized potential for liquid simulations (OPLS) force fields of calculations have been performed on IGF-1 as growth factor. The parameters of minimized structure of IGF-1, calculated potential energy for important dihedral angles and the effect of temperature on geometry of optimized structure have been calculated. In this work, we have used different temperatures at gas and water media and we have seen that in simulation approaches, scaling up the interaction energy has a similar effect to lowering temperature. This study has demonstrated that the simple model including an approximate average solvent effect can simulate the qualitative feature of the IGF-1. The key research was to find dynamics of biomolecular structure and an appropriate effective stabilized energy.
The empirical force fields have great difficulty in simulating folding of insulin-like growth fac... more The empirical force fields have great difficulty in simulating folding of insulin-like growth factor 1 (IGF-1). In an effort to understand the conformational preferences that may be attributed to stereoelectronic effects, a number of computational studies are carried out. Monte Carlo, molecular dynamics and Langevin simulation methods by MM+, amber and optimized potential for liquid simulations (OPLS) force fields of calculations have been performed on IGF-1 as growth factor. The parameters of minimized structure of IGF-1, calculated potential energy for important dihedral angles and the effect of temperature on geometry of optimized structure have been calculated. In this work, we have used different temperatures at gas and water media and we have seen that in simulation approaches, scaling up the interaction energy has a similar effect to lowering temperature. This study has demonstrated that the simple model including an approximate average solvent effect can simulate the qualitative feature of the IGF-1. The key research was to find dynamics of biomolecular structure and an appropriate effective stabilized energy.
Phosphorus Sulfur and Silicon and The Related Elements, Jul 21, 2016
GRAPHICAL ABSTRACT ABSTRACT A sulfonic acid functionalized ionic liquid was designed, synthesized... more GRAPHICAL ABSTRACT ABSTRACT A sulfonic acid functionalized ionic liquid was designed, synthesized and successfully used as a Brønsted acid catalyst for the one-pot synthesis of α-aminophosphonates containing benzothiazole at room temperature under solvent-free conditions in excellent yields. The advantages of this method are the reusability of the catalyst, high conversion, short reaction time, and simple experimental procedure. A computer modeling and docking simulation of ligand bond complexes of cyclin-dependent kinase 2 are presented. The results indicate that diethyl ((4-(dimethylamino) phenyl) ((6-nitrobenzo[d]thiazol-2-yl) amino)methyl)phosphonate was found to be the best selective inhibitor of cyclin-dependent kinase 2.
The CLAO journal : official publication of the Contact Lens Association of Ophthalmologists, Inc, 2001
To compare sequential and competitive adsorption of some proteins onto hydrogel contact lenses. N... more To compare sequential and competitive adsorption of some proteins onto hydrogel contact lenses. New, never-worn, group IV soft contact lenses were incubated in freshly prepared solutions of lysozyme, alpha-lactalbumin, and ribonuclease at room temperature for 5 days with constant shaking, during which time their adsorbed protein was directly measured using UV absorbances at 280 nm. Adsorption isotherms were prepared. The lenses were rinsed with distilled water following a second protein treatment. We found that the chemical composition of the lens and the charge of the previously adsorbed protein affected sequential and competitive adsorption of proteins on a contact lens surface. Sequential adsorption occurs only if the second protein has a more favorable electrostatic interaction; sequential adsorption involves almost total displacement of the preadsorbed protein.
The α-amino phosphonates find a wide spectrum of applications in medicinal, industrial, and agric... more The α-amino phosphonates find a wide spectrum of applications in medicinal, industrial, and agricultural chemistry. The most simple and straight forward synthetic technique for the formation of α-amino phosphonates is the Kabachnik–Fields reaction (an MCR) which involves the one-pot, three-component coupling of an aldehyde or ketone (carbonyl compound), amine and phosphite ester. The development of computational approaches as another tool for determining the features of chemicals has been a content of intensive research. In the current research, the AutoDock 4.0 package was employed for docking synthetic compounds into a protein, cyclin-dependent kinase 2 with the flexible side chain of TYR15. Cyclin-dependent kinase 2 (CDK2) is a member of an extremely conserved family of protein kinases that regulate the eukaryotic cell cycle. The lowest energy poses obtained in docking simulations of dimethyl ((4-nitrophenyl)(phenylamino)methyl) phosphonate were attained with the CDK2 model. This...
Insulin-like growth factor (IGF-1) is an anti-apoptosis factor in multiple cell types associated ... more Insulin-like growth factor (IGF-1) is an anti-apoptosis factor in multiple cell types associated with various cancers. Computational methods allow investigating the systems between 50–100 atoms in the frame of quantum mechanics and up to 50,000 atoms with molecular dynamics. Since there are specific interactions between the residues, the solvent could play an important role in the stability of the native structure. Therefore it is useful to carry out such simulations at atomistic detail. MC, MD and LD simulations of the IGF-1 were performed with the HyperChem7.0 program. The geometries, and the interaction energies, bonds, angles, stretch-bends, electrostatic and the VDW Interactions were carried out in solution and gas phase. We have computed the transition temperature for the IGF-1 molecule. Studying the changes occurred in the potential energy of the three force fields showed that Amber force field is better than MM+ and OPLS force field and also MD simulation, at least in this m...
Medical Laboratory Journal, 2020
Background and objectives: Polyphenols can exert free radical scavenging effects by naturalizing ... more Background and objectives: Polyphenols can exert free radical scavenging effects by naturalizing dangerous reactive oxidants. Formation of reactive oxygen species can cause oxidative damage to human cells, leading to various diseases such as cancer, cardiovascular disease, osteoporosis and degenerative diseases. In this study, we investigated effect of treatment with various concentrations of lead (II) nitrate, a toxic and an oxidizing agent, on growth and biochemical parameters of alfalfa (Medicago sativa L). Methods: Total phenol content was estimated by the Folin-Ciocalteu method. The 1,1diphenyl-2-picrylhydrazyl (DPPH) stable free radical was used for assessment of free radicalscavenging activity. Changes in the activity of catalase and peroxidase as well as in the level of proteins, phenol content and malondialdehyde (as marker of lipid peroxidation) were investigated following treatment with different concentrations (0, 8, 12 and 16 mg/l) of lead nitrate for 21 days. All experiments were done in triplicate. Butylated hydroxytoluene and quercetin were used as standard controls. Results: Treatment with lead significantly altered the level of total phenolic content, proteins, malondialdehyde and the activity of catalase and peroxidase (P<0.05). Conclusion: Our results indicate that lead-contaminated soil can significantly alter biochemical and growth parameters of alfalfa.
High performance liquid chromatography technique for chemical analysis for the separation, identi... more High performance liquid chromatography technique for chemical analysis for the separation, identification and quantification of the components of a mixture. In this technique, which is located by creating high-pressure pumps, liquid solvent to the mixture of solid adsorbent material passes through the column. Chromatography is widely used in biological research and various research and development has overcome tremendous. In different ways chromatographic are mobile phase and a stationary phase. It also allows you to use a very much smaller particle size for the column packing material which passes a much greater surface area for interactions between the stationary phase and the molecules flowing past it. This allows a much better separation of the components of the mixture.
A sulfonic acid functionalized ionic liquid was designed, synthesized and successfully used as a ... more A sulfonic acid functionalized ionic liquid was designed, synthesized and successfully used as a Brønsted acid catalyst for the one-pot synthesis of α-aminophosphonates containing benzothiazole at room temperature under solvent-free conditions in excellent yields. The advantages of this method are the reusability of the catalyst, high conversion, short reaction time, and simple experimental procedure. A computer modeling and docking simulation of ligand bond complexes of cyclin-dependent kinase 2 are presented. The results indicate that diethyl ((4-(dimethylamino) phenyl) ((6-nitrobenzo[<i>d</i>]thiazol-2-yl) amino)methyl)phosphonate was found to be the best selective inhibitor of cyclin-dependent kinase 2.
Tissue and Cell, 2022
5-Fluorouracil (5-FU) is being used in the treatment of several malignancies, but side effects ar... more 5-Fluorouracil (5-FU) is being used in the treatment of several malignancies, but side effects are often reported and include: diarrhea, vomiting, nausea, poor appetite, watery eyes, and photophobia. We have developed and tested the cytotoxic activity of nanocrystalline powder of γ-alumina (γ-Al2O3) containing 5-FU in two-dimensional and three-dimensional (3D) CRC cell culture. γ-Al2O3 was prepared using a facile sol-gel method. The physicochemical properties of nanoparticles were investigated by Fourier Transform Infrared (FTIR) analysis, Field Emission Scanning Electron Microscopy (FESEM) and Energy Dispersive X-ray Analysis (EDXA). Moreover, the particle size was monitored by Transmission Electron Microscopy (TEM). We used MTT and a scratch assay to assess the antiproliferative and anti-migratory of this agent. The effect of γ-Al2O3-5-FU on SOD, MDA, and total-thiols levels were evaluated. We assessed the expression of apoptotic markers in mRNA or proteins by RT-PCR and ELISA respectively. γ-Al2O3-5-FU inhibited cell growth in two-dimensional (2D) and three-dimensional (3D) cell culture and increased apoptosis as detected by DAPI stainning via modulation of caspases, BAx, BCl2 and cyclinD1. γ-Al2O3-5-FU also reduced the migratory activity of CRC cells relative to untreated controls. γ-Al2O3-5-FU increased the level of MDA, while reducing the level of SOD and total-thiols as well as inflamatory markers (e.g., TNF-s and IL-6). Our study demonstrated that γ-Al2O3-5-FU inhibited cell growth and migration, indicating its potential value in the treatment of colorectal cancer.
Toxicology and Applied Pharmacology, 2022
BACKGROUND Overexpression of the angiotensin-II receptor and renin-angiotensin system (RAS) has b... more BACKGROUND Overexpression of the angiotensin-II receptor and renin-angiotensin system (RAS) has been reported in several malignancies, including colorectal-cancer (CRC), indicating its potential value as a therapeutic target. Here we explored the impact of targeting the RAS using an angiotensin II receptor blocker, valsartan, alone and its combination with Fluorouracil (5-FU) in in vitro and in vivo models of CRC. METHODS Anti-proliferative activity of valsartan was evaluated in 2-/3-dimensional in vitro and in vivo CRC mouse models. The anti-migratory effects of this agent was assessed by wound-healing assay, while apoptosis was studied using 4',6-diamidino-2-phenylindole or DAPI staining, and staining with Annexin-V-fluorescein isothiocyanate with analysis using FACS. Gene-expression was determined at mRNA and protein levels. We further evaluated the anti-inflammatory properties of valsartan by histological analysis and the measurement of oxidative/antioxidant markers. Gelatin zymography was used to measure matrix metalloproteinase-2 and -9 activity (MMP-2 and 9). RESULTS Valsartan suppressed CRC cell-growth and synergistically enhanced the anti-tumor-activities of 5-FU by induction of apoptosis, BAX, BCL2, P53 and modulation of the cell cycle. Valsartan inhibited the cell migration by perturbation of MMP2/9. Furthermore, valsartan inhibited tumor-growth, and this was more pronounced when using the valsartan/5-FU combination. The plausible mechanism for this is via the induction of ROS and down-regulation of SOD, thiol/catalase as well as VEGF. Valsartan may protect cells against intestinal fibrosis by modulation of pro-fibrotic and pro-inflammatory factors including interleukins and Col1A1 expression. CONCLUSIONS Our findings demonstrated that targeting RAS pathway using Valsartan interferes with cell-proliferation, induces apoptosis, reduces migration and synergistically interacts with 5-FU, supporting further studies on this new therapeutic approach for colorectal cancer.
Academic Journals, Sep 30, 2013
Anethum graveolens L. (dill), an important member of the Umbelliferae family native to southwest ... more Anethum graveolens L. (dill), an important member of the Umbelliferae family native to southwest Asia or southeast Europe, is broadly used for flavoring foods and bev erages due to its pleasant spicy aroma. Cultivated since antiquity, dill is a hardy annual or biennial plant and has a single stem with a termina l or primary umbellate flower. Its pharmacological properties, such as its antibacteri al activity, as well as antihyperlipidemic and antihypercholesterolemic effects, have been reporte d. As a traditional medicine, dill increases milk p roduction and promotes menstruation in females. Some studies have shown that dill seed oil suppresses some spoilage fungi. Dill is also widely distributed in the Xinjiang Uyghur A utonomous Region of China and has been commonly use d a medicine and food flavor. In China, dill seeds have known pharmacological effects, such as promoting a ppetite and alleviating pain effects [1].
Background: The empirical force fields have great difficulty in simulating folding of choline ace... more Background: The empirical force fields have great difficulty in simulating folding of choline acetyltransferase. Monte Carlo, molecular dynamics and Langevin simulation methods by MM+, amber and opls optimized potential for liquid simulations (OPLS) force fields of calculations have been performed on active site of choline acetyltransferaseas memory enzyme. The parameters of minimized structure of active site of choline acetyltrasferase, calculated potential energy for important dihedral angles and the effect of temperature on geometry of optimized structure have been calculated. In this work, we have used different temperatures at water media and we have seen that in simulation approaches, scaling up the interaction energy has a similar effect to lowering temperature. The key research was to find dynamics of biomolecular structure and an appropriate effective stabilized energy.
Objective(s): Glioblastoma multiforme (GBM), a highly aggressive Grade IV brain tumor, is a signi... more Objective(s): Glioblastoma multiforme (GBM), a highly aggressive Grade IV brain tumor, is a significant public health issue due to its poor prognosis and incurability. Neuropeptide substance P (SP) plays a critical role in GBM tumor growth and development via activation of neurokinin-1receptor (NK1R). Moreover, SP is a pro-oxidant factor contributing to oxidative stress in various cell types. However, the link between SP and oxidative stress in cancer cells is not fully investigated. Here, we aimed to identify the effects of SP and NK1R antagonist, aprepitant, on the redox status of GBM cells. Materials and Methods: Resazurin assay was employed to determine the effect of aprepitant on viability of U87 glioblastoma cells. 2’,7’-dichlorodihydrofluorescein diacetate (H2DCFDA) assay was employed to measure the levels of intracellular reactive oxygen species (ROS). A quantitative real-time polymerase chain reaction was applied to measure the expression of proteins of the thioredoxin syst...
Medical Laboratory Journal, 2020
Background and objectives: Polyphenols can exert free radical scavenging effects by naturalizing ... more Background and objectives: Polyphenols can exert free radical scavenging effects by naturalizing dangerous reactive oxidants. Formation of reactive oxygen species can cause oxidative damage to human cells, leading to various diseases such as cancer, cardiovascular disease, osteoporosis and degenerative diseases. In this study, we investigated effect of treatment with various concentrations of lead (II) nitrate, a toxic and an oxidizing agent, on growth and biochemical parameters of alfalfa (Medicago sativa L). Methods: Total phenol content was estimated by the Folin-Ciocalteu method. The 1,1diphenyl-2-picrylhydrazyl (DPPH) stable free radical was used for assessment of free radicalscavenging activity. Changes in the activity of catalase and peroxidase as well as in the level of proteins, phenol content and malondialdehyde (as marker of lipid peroxidation) were investigated following treatment with different concentrations (0, 8, 12 and 16 mg/l) of lead nitrate for 21 days. All exper...
Journal of Cell and …, 2010
... Kurochkina and Lee have shown that the pair-wise sum of the buried surface area is linearly r... more ... Kurochkina and Lee have shown that the pair-wise sum of the buried surface area is linearly related to the true buried area (Sung, 1999). ... 10-Hartung H., Ahnert R., Schollmeyer D., Holdt HJ, Teller(1992)Coronanden mit 1,2-Dithio-ethen-Einheiten. II. ...
Journal of the Iranian Chemical Society
The empirical force fields have great difficulty in simulating folding of insulin-like growth fac... more The empirical force fields have great difficulty in simulating folding of insulin-like growth factor 1 (IGF-1). In an effort to understand the conformational preferences that may be attributed to stereoelectronic effects, a number of computational studies are carried out. Monte Carlo, molecular dynamics and Langevin simulation methods by MM+, amber and optimized potential for liquid simulations (OPLS) force fields of calculations have been performed on IGF-1 as growth factor. The parameters of minimized structure of IGF-1, calculated potential energy for important dihedral angles and the effect of temperature on geometry of optimized structure have been calculated. In this work, we have used different temperatures at gas and water media and we have seen that in simulation approaches, scaling up the interaction energy has a similar effect to lowering temperature. This study has demonstrated that the simple model including an approximate average solvent effect can simulate the qualitative feature of the IGF-1. The key research was to find dynamics of biomolecular structure and an appropriate effective stabilized energy.
The empirical force fields have great difficulty in simulating folding of insulin-like growth fac... more The empirical force fields have great difficulty in simulating folding of insulin-like growth factor 1 (IGF-1). In an effort to understand the conformational preferences that may be attributed to stereoelectronic effects, a number of computational studies are carried out. Monte Carlo, molecular dynamics and Langevin simulation methods by MM+, amber and optimized potential for liquid simulations (OPLS) force fields of calculations have been performed on IGF-1 as growth factor. The parameters of minimized structure of IGF-1, calculated potential energy for important dihedral angles and the effect of temperature on geometry of optimized structure have been calculated. In this work, we have used different temperatures at gas and water media and we have seen that in simulation approaches, scaling up the interaction energy has a similar effect to lowering temperature. This study has demonstrated that the simple model including an approximate average solvent effect can simulate the qualitative feature of the IGF-1. The key research was to find dynamics of biomolecular structure and an appropriate effective stabilized energy.
Phosphorus Sulfur and Silicon and The Related Elements, Jul 21, 2016
GRAPHICAL ABSTRACT ABSTRACT A sulfonic acid functionalized ionic liquid was designed, synthesized... more GRAPHICAL ABSTRACT ABSTRACT A sulfonic acid functionalized ionic liquid was designed, synthesized and successfully used as a Brønsted acid catalyst for the one-pot synthesis of α-aminophosphonates containing benzothiazole at room temperature under solvent-free conditions in excellent yields. The advantages of this method are the reusability of the catalyst, high conversion, short reaction time, and simple experimental procedure. A computer modeling and docking simulation of ligand bond complexes of cyclin-dependent kinase 2 are presented. The results indicate that diethyl ((4-(dimethylamino) phenyl) ((6-nitrobenzo[d]thiazol-2-yl) amino)methyl)phosphonate was found to be the best selective inhibitor of cyclin-dependent kinase 2.
The CLAO journal : official publication of the Contact Lens Association of Ophthalmologists, Inc, 2001
To compare sequential and competitive adsorption of some proteins onto hydrogel contact lenses. N... more To compare sequential and competitive adsorption of some proteins onto hydrogel contact lenses. New, never-worn, group IV soft contact lenses were incubated in freshly prepared solutions of lysozyme, alpha-lactalbumin, and ribonuclease at room temperature for 5 days with constant shaking, during which time their adsorbed protein was directly measured using UV absorbances at 280 nm. Adsorption isotherms were prepared. The lenses were rinsed with distilled water following a second protein treatment. We found that the chemical composition of the lens and the charge of the previously adsorbed protein affected sequential and competitive adsorption of proteins on a contact lens surface. Sequential adsorption occurs only if the second protein has a more favorable electrostatic interaction; sequential adsorption involves almost total displacement of the preadsorbed protein.
The α-amino phosphonates find a wide spectrum of applications in medicinal, industrial, and agric... more The α-amino phosphonates find a wide spectrum of applications in medicinal, industrial, and agricultural chemistry. The most simple and straight forward synthetic technique for the formation of α-amino phosphonates is the Kabachnik–Fields reaction (an MCR) which involves the one-pot, three-component coupling of an aldehyde or ketone (carbonyl compound), amine and phosphite ester. The development of computational approaches as another tool for determining the features of chemicals has been a content of intensive research. In the current research, the AutoDock 4.0 package was employed for docking synthetic compounds into a protein, cyclin-dependent kinase 2 with the flexible side chain of TYR15. Cyclin-dependent kinase 2 (CDK2) is a member of an extremely conserved family of protein kinases that regulate the eukaryotic cell cycle. The lowest energy poses obtained in docking simulations of dimethyl ((4-nitrophenyl)(phenylamino)methyl) phosphonate were attained with the CDK2 model. This...
Insulin-like growth factor (IGF-1) is an anti-apoptosis factor in multiple cell types associated ... more Insulin-like growth factor (IGF-1) is an anti-apoptosis factor in multiple cell types associated with various cancers. Computational methods allow investigating the systems between 50–100 atoms in the frame of quantum mechanics and up to 50,000 atoms with molecular dynamics. Since there are specific interactions between the residues, the solvent could play an important role in the stability of the native structure. Therefore it is useful to carry out such simulations at atomistic detail. MC, MD and LD simulations of the IGF-1 were performed with the HyperChem7.0 program. The geometries, and the interaction energies, bonds, angles, stretch-bends, electrostatic and the VDW Interactions were carried out in solution and gas phase. We have computed the transition temperature for the IGF-1 molecule. Studying the changes occurred in the potential energy of the three force fields showed that Amber force field is better than MM+ and OPLS force field and also MD simulation, at least in this m...
Medical Laboratory Journal, 2020
Background and objectives: Polyphenols can exert free radical scavenging effects by naturalizing ... more Background and objectives: Polyphenols can exert free radical scavenging effects by naturalizing dangerous reactive oxidants. Formation of reactive oxygen species can cause oxidative damage to human cells, leading to various diseases such as cancer, cardiovascular disease, osteoporosis and degenerative diseases. In this study, we investigated effect of treatment with various concentrations of lead (II) nitrate, a toxic and an oxidizing agent, on growth and biochemical parameters of alfalfa (Medicago sativa L). Methods: Total phenol content was estimated by the Folin-Ciocalteu method. The 1,1diphenyl-2-picrylhydrazyl (DPPH) stable free radical was used for assessment of free radicalscavenging activity. Changes in the activity of catalase and peroxidase as well as in the level of proteins, phenol content and malondialdehyde (as marker of lipid peroxidation) were investigated following treatment with different concentrations (0, 8, 12 and 16 mg/l) of lead nitrate for 21 days. All experiments were done in triplicate. Butylated hydroxytoluene and quercetin were used as standard controls. Results: Treatment with lead significantly altered the level of total phenolic content, proteins, malondialdehyde and the activity of catalase and peroxidase (P<0.05). Conclusion: Our results indicate that lead-contaminated soil can significantly alter biochemical and growth parameters of alfalfa.
High performance liquid chromatography technique for chemical analysis for the separation, identi... more High performance liquid chromatography technique for chemical analysis for the separation, identification and quantification of the components of a mixture. In this technique, which is located by creating high-pressure pumps, liquid solvent to the mixture of solid adsorbent material passes through the column. Chromatography is widely used in biological research and various research and development has overcome tremendous. In different ways chromatographic are mobile phase and a stationary phase. It also allows you to use a very much smaller particle size for the column packing material which passes a much greater surface area for interactions between the stationary phase and the molecules flowing past it. This allows a much better separation of the components of the mixture.
A sulfonic acid functionalized ionic liquid was designed, synthesized and successfully used as a ... more A sulfonic acid functionalized ionic liquid was designed, synthesized and successfully used as a Brønsted acid catalyst for the one-pot synthesis of α-aminophosphonates containing benzothiazole at room temperature under solvent-free conditions in excellent yields. The advantages of this method are the reusability of the catalyst, high conversion, short reaction time, and simple experimental procedure. A computer modeling and docking simulation of ligand bond complexes of cyclin-dependent kinase 2 are presented. The results indicate that diethyl ((4-(dimethylamino) phenyl) ((6-nitrobenzo[<i>d</i>]thiazol-2-yl) amino)methyl)phosphonate was found to be the best selective inhibitor of cyclin-dependent kinase 2.
Tissue and Cell, 2022
5-Fluorouracil (5-FU) is being used in the treatment of several malignancies, but side effects ar... more 5-Fluorouracil (5-FU) is being used in the treatment of several malignancies, but side effects are often reported and include: diarrhea, vomiting, nausea, poor appetite, watery eyes, and photophobia. We have developed and tested the cytotoxic activity of nanocrystalline powder of γ-alumina (γ-Al2O3) containing 5-FU in two-dimensional and three-dimensional (3D) CRC cell culture. γ-Al2O3 was prepared using a facile sol-gel method. The physicochemical properties of nanoparticles were investigated by Fourier Transform Infrared (FTIR) analysis, Field Emission Scanning Electron Microscopy (FESEM) and Energy Dispersive X-ray Analysis (EDXA). Moreover, the particle size was monitored by Transmission Electron Microscopy (TEM). We used MTT and a scratch assay to assess the antiproliferative and anti-migratory of this agent. The effect of γ-Al2O3-5-FU on SOD, MDA, and total-thiols levels were evaluated. We assessed the expression of apoptotic markers in mRNA or proteins by RT-PCR and ELISA respectively. γ-Al2O3-5-FU inhibited cell growth in two-dimensional (2D) and three-dimensional (3D) cell culture and increased apoptosis as detected by DAPI stainning via modulation of caspases, BAx, BCl2 and cyclinD1. γ-Al2O3-5-FU also reduced the migratory activity of CRC cells relative to untreated controls. γ-Al2O3-5-FU increased the level of MDA, while reducing the level of SOD and total-thiols as well as inflamatory markers (e.g., TNF-s and IL-6). Our study demonstrated that γ-Al2O3-5-FU inhibited cell growth and migration, indicating its potential value in the treatment of colorectal cancer.
Toxicology and Applied Pharmacology, 2022
BACKGROUND Overexpression of the angiotensin-II receptor and renin-angiotensin system (RAS) has b... more BACKGROUND Overexpression of the angiotensin-II receptor and renin-angiotensin system (RAS) has been reported in several malignancies, including colorectal-cancer (CRC), indicating its potential value as a therapeutic target. Here we explored the impact of targeting the RAS using an angiotensin II receptor blocker, valsartan, alone and its combination with Fluorouracil (5-FU) in in vitro and in vivo models of CRC. METHODS Anti-proliferative activity of valsartan was evaluated in 2-/3-dimensional in vitro and in vivo CRC mouse models. The anti-migratory effects of this agent was assessed by wound-healing assay, while apoptosis was studied using 4',6-diamidino-2-phenylindole or DAPI staining, and staining with Annexin-V-fluorescein isothiocyanate with analysis using FACS. Gene-expression was determined at mRNA and protein levels. We further evaluated the anti-inflammatory properties of valsartan by histological analysis and the measurement of oxidative/antioxidant markers. Gelatin zymography was used to measure matrix metalloproteinase-2 and -9 activity (MMP-2 and 9). RESULTS Valsartan suppressed CRC cell-growth and synergistically enhanced the anti-tumor-activities of 5-FU by induction of apoptosis, BAX, BCL2, P53 and modulation of the cell cycle. Valsartan inhibited the cell migration by perturbation of MMP2/9. Furthermore, valsartan inhibited tumor-growth, and this was more pronounced when using the valsartan/5-FU combination. The plausible mechanism for this is via the induction of ROS and down-regulation of SOD, thiol/catalase as well as VEGF. Valsartan may protect cells against intestinal fibrosis by modulation of pro-fibrotic and pro-inflammatory factors including interleukins and Col1A1 expression. CONCLUSIONS Our findings demonstrated that targeting RAS pathway using Valsartan interferes with cell-proliferation, induces apoptosis, reduces migration and synergistically interacts with 5-FU, supporting further studies on this new therapeutic approach for colorectal cancer.
Academic Journals, Sep 30, 2013
Anethum graveolens L. (dill), an important member of the Umbelliferae family native to southwest ... more Anethum graveolens L. (dill), an important member of the Umbelliferae family native to southwest Asia or southeast Europe, is broadly used for flavoring foods and bev erages due to its pleasant spicy aroma. Cultivated since antiquity, dill is a hardy annual or biennial plant and has a single stem with a termina l or primary umbellate flower. Its pharmacological properties, such as its antibacteri al activity, as well as antihyperlipidemic and antihypercholesterolemic effects, have been reporte d. As a traditional medicine, dill increases milk p roduction and promotes menstruation in females. Some studies have shown that dill seed oil suppresses some spoilage fungi. Dill is also widely distributed in the Xinjiang Uyghur A utonomous Region of China and has been commonly use d a medicine and food flavor. In China, dill seeds have known pharmacological effects, such as promoting a ppetite and alleviating pain effects [1].
Background: The empirical force fields have great difficulty in simulating folding of choline ace... more Background: The empirical force fields have great difficulty in simulating folding of choline acetyltransferase. Monte Carlo, molecular dynamics and Langevin simulation methods by MM+, amber and opls optimized potential for liquid simulations (OPLS) force fields of calculations have been performed on active site of choline acetyltransferaseas memory enzyme. The parameters of minimized structure of active site of choline acetyltrasferase, calculated potential energy for important dihedral angles and the effect of temperature on geometry of optimized structure have been calculated. In this work, we have used different temperatures at water media and we have seen that in simulation approaches, scaling up the interaction energy has a similar effect to lowering temperature. The key research was to find dynamics of biomolecular structure and an appropriate effective stabilized energy.
Objective(s): Glioblastoma multiforme (GBM), a highly aggressive Grade IV brain tumor, is a signi... more Objective(s): Glioblastoma multiforme (GBM), a highly aggressive Grade IV brain tumor, is a significant public health issue due to its poor prognosis and incurability. Neuropeptide substance P (SP) plays a critical role in GBM tumor growth and development via activation of neurokinin-1receptor (NK1R). Moreover, SP is a pro-oxidant factor contributing to oxidative stress in various cell types. However, the link between SP and oxidative stress in cancer cells is not fully investigated. Here, we aimed to identify the effects of SP and NK1R antagonist, aprepitant, on the redox status of GBM cells. Materials and Methods: Resazurin assay was employed to determine the effect of aprepitant on viability of U87 glioblastoma cells. 2’,7’-dichlorodihydrofluorescein diacetate (H2DCFDA) assay was employed to measure the levels of intracellular reactive oxygen species (ROS). A quantitative real-time polymerase chain reaction was applied to measure the expression of proteins of the thioredoxin syst...
Medical Laboratory Journal, 2020
Background and objectives: Polyphenols can exert free radical scavenging effects by naturalizing ... more Background and objectives: Polyphenols can exert free radical scavenging effects by naturalizing dangerous reactive oxidants. Formation of reactive oxygen species can cause oxidative damage to human cells, leading to various diseases such as cancer, cardiovascular disease, osteoporosis and degenerative diseases. In this study, we investigated effect of treatment with various concentrations of lead (II) nitrate, a toxic and an oxidizing agent, on growth and biochemical parameters of alfalfa (Medicago sativa L). Methods: Total phenol content was estimated by the Folin-Ciocalteu method. The 1,1diphenyl-2-picrylhydrazyl (DPPH) stable free radical was used for assessment of free radicalscavenging activity. Changes in the activity of catalase and peroxidase as well as in the level of proteins, phenol content and malondialdehyde (as marker of lipid peroxidation) were investigated following treatment with different concentrations (0, 8, 12 and 16 mg/l) of lead nitrate for 21 days. All exper...
Journal of Cell and …, 2010
... Kurochkina and Lee have shown that the pair-wise sum of the buried surface area is linearly r... more ... Kurochkina and Lee have shown that the pair-wise sum of the buried surface area is linearly related to the true buried area (Sung, 1999). ... 10-Hartung H., Ahnert R., Schollmeyer D., Holdt HJ, Teller(1992)Coronanden mit 1,2-Dithio-ethen-Einheiten. II. ...
Journal of the Iranian Chemical Society