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Stüben BO, Ahmadi S, Saner FH, Li J, Neuhaus JP, Treckmann JW, Hoyer DP. The significance of resection margins on R0 results in intrahepatic cholangiocarcinoma. Surg Oncol 2024; 53:102058. [PMID: 38431994 DOI: 10.1016/j.suronc.2024.102058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 02/01/2024] [Accepted: 02/28/2024] [Indexed: 03/05/2024]
Abstract
BACKGROUND Intrahepatic cholangiocarcinoma is the second most common primary liver cancer after hepatocellular carcinoma with an increasing incidence worldwide. Surgical resection is still the only potential cure, and survival rates are dismal due to disease relapse after resection and/or metastatic disease. Positive resection margins are associated with recurrence, with conflicting studies regarding the benefits of wide resection margins to reduce recurrence rates. METHODS 126 patients with an R0 resection treated with hepatic surgery for intrahepatic cholangiocarcinoma at the Surgical Department at the Medical University Centre Essen, Germany were identified in a database and retrospectively analysed. Patients were grouped into three groups according to margin width, <1 mm (very narrow margin width) 1-5 mm (narrow margin width) and >5 mm (wide margin width). Epidemiological as well as perioperative data was analysed, and a univariate analysis as well as Kaplan-Meier plots carried out to investigate recurrence-free and overall survival. RESULTS Wider resection margins did not lead to better recurrence-free survival. A wider resection margin >5 mm was not significantly associated with improved overall survival. Positive lymph nodes (HR 2.50, 95% CI 1.11-5.61, p=0.027) and non-anatomic resections (HR 2.06, 95% CI 1.13-3.75, p=0.019) are significantly associated with poorer overall survival. Regarding recurrence-free survival, V2 vascular invasion was the only risk factor statistically significantly associated with poorer recurrence-free survival (HR 8.83, 95% CI 0.85-2.83, p=0.005). CONCLUSION Resection margins did not have a significant impact on disease free survival or overall survival following hepatic resection for intrahepatic cholangiocarcinoma. Non-anatomical resections, lymph node and vascular invasion all significantly impacted oncological outcomes.
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Affiliation(s)
- B O Stüben
- Department of General-, Visceral- and Transplant Surgery, Medical Centre University Duisburg-Essen, 45147, Essen, Germany.
| | - S Ahmadi
- Department of General-, Visceral- and Transplant Surgery, Medical Centre University Duisburg-Essen, 45147, Essen, Germany
| | - F H Saner
- Department of General-, Visceral- and Transplant Surgery, Medical Centre University Duisburg-Essen, 45147, Essen, Germany; Organ Transplant Center of Excellence, King Faisal Specialist Hospital & Research Center, Riyadh, Kingdom of Saudi Arabia
| | - J Li
- Department of Surgery, Jiahui International Hospital, Shanghai, China
| | - J P Neuhaus
- Department of General-, Visceral- and Transplant Surgery, Medical Centre University Duisburg-Essen, 45147, Essen, Germany
| | - J W Treckmann
- Department of General-, Visceral- and Transplant Surgery, Medical Centre University Duisburg-Essen, 45147, Essen, Germany
| | - D P Hoyer
- Department of General-, Visceral- and Transplant Surgery, Medical Centre University Duisburg-Essen, 45147, Essen, Germany
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Ahmadi S, Lotay N, Thompson M. Affinity-based electrochemical biosensor with antifouling properties for detection of lysophosphatidic acid, a promising early-stage ovarian cancer biomarker. Bioelectrochemistry 2023; 153:108466. [PMID: 37244204 DOI: 10.1016/j.bioelechem.2023.108466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/09/2023] [Accepted: 05/12/2023] [Indexed: 05/29/2023]
Abstract
Electrochemical techniques are considered to be highly sensitive, capable of fast response and can be easily miniaturized, properties which can aid with regard to the fabrication of compact point-of-care medical devices; however, the main challenge in developing such a tool is overcoming a ubiquitous, problematic phenomenon known as non-specific adsorption (NSA). NSA is due to the fouling of non-target molecules in the blood on the recognition surface of the device. To overcome NSA, we have developed an affinity-based electrochemical biosensor using medical-grade stainless steel electrodes and following a unique and novel strategy using silane-based interfacial chemistry to detect lysophosphatidic acid (LPA), a highly promising biomarker, which was found to be elevated in 90 % of stage I OC patients and gradually increases as the disease progresses to later stages. The biorecognition surface was developed using the affinity-based gelsolin-actin system, which was previously investigated by our group to detect LPA using fluorescence spectroscopy. We demonstrate the capability of this label-free biosensor to detect LPA in goat serum with a detection limit of 0.7 µM as a proof-of-concept for the early diagnosis of ovarian cancer.
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Affiliation(s)
- Soha Ahmadi
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - Navina Lotay
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - Michael Thompson
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada.
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Ahmadi S, Mosavari N, Tebianian M. Comparative Evaluation of Specific Antibody against Mycobacterium tuberculosis ESAT-6 Recombinant Antigen in Healthy Subject with Positive and Negative Skin Test. Arch Razi Inst 2023; 78:815-821. [PMID: 38028850 PMCID: PMC10657930 DOI: 10.22092/ari.2022.360063.2543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 10/03/2022] [Indexed: 12/01/2023]
Abstract
Tuberculosis (TB) is an infectious disease caused by Mycobacterium tuberculosis (M. tuberculosis). The laboratory diagnosis of the disease includes various bacteriologic and immunologic methods. Despite the effectiveness of many of these methods in diagnosing active TB, their high cost and time-consuming nature have led researchers to adopt more accurate and rapid screening methods based on specific antigens for M. tuberculosis. The present study aimed to measure specific antibody serum levels against the early secretory antigenic target 6 kDa (ESAT-6) recombinant protein in healthy people and compare it to TB patients. The target population included 27 TB patients and 87 healthy individuals with no clinical TB symptoms. The healthy population was divided into two groups, including positive purified protein derivative (PPD) and negative PPD (35 and 52 people, respectively), using the Tuberculin skin test. The specific antibody level against the ESAT-6 recombinant antigen and the PPD protein was measured using an indirect Enzyme-Linked Immunosorbent Assay (ELISA) test. The results of the study showed that the majority of the healthy population with no symptoms of clinical TB and having negative skin test results did not have antibodies against the recombinant ESAT-6 (98%) and PPD (96%) antigens. On the other hand, there was a high level of the specific antibody of the ESAT-6 recombinant and PPD antigens in TB patients (77%). It is notable that in people with positive skin test results, the level of the antibody against the ESAT-6 recombinant antigen and PPD antigen was 94%. The results demonstrated that the ELISA method based on the measurement of antibodies against the ESAT-6 recombinant antigen can be a proper diagnostic method for rapid and accurate screening of healthy from infected people.
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Affiliation(s)
- S Ahmadi
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
| | - N Mosavari
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
| | - M Tebianian
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
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Ahmadi S, Dayyani M, Etemadrezaie H, Bateni F, Mohabbati H, Pooyan A, Zabihyan S. Diaphragma sellae orifice ratio, is it an applicable anatomical index to determine the direction of the growth of pituitary macroadenomas? Interdisciplinary Neurosurgery 2022. [DOI: 10.1016/j.inat.2022.101547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Ho T, Ahmadi S, Kerman K. Do glutathione and copper interact to modify Alzheimer's disease pathogenesis? Free Radic Biol Med 2022; 181:180-196. [PMID: 35092854 DOI: 10.1016/j.freeradbiomed.2022.01.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 01/20/2022] [Accepted: 01/24/2022] [Indexed: 12/11/2022]
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disorder first described in 1906 that is currently estimated to impact ∼40 million people worldwide. Extensive research activities have led to a wealth of information on the pathogenesis, hallmarks, and risk factors of AD; however, therapeutic options remain extremely limited. The large number of pathogenic factors that have been reported to potentially contribute to AD include copper dyshomeostasis as well as increased oxidative stress, which is related to alterations to molecular antioxidants like glutathione (GSH). While the individual roles of GSH and copper in AD have been studied by many research groups, their interactions have received relatively little attention, although they appear to interact and affect each other's regulation. Existing knowledge on how GSH-copper interactions may affect AD is sparse and lacks focus. This review first highlights the most relevant individual roles that GSH and copper play in physiology and AD, and then collects and assesses research concerning their interactions, in an effort to provide a more accessible and understandable picture of the role of GSH, copper, and their interactions in AD.
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Affiliation(s)
- Talia Ho
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada; Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, ON, M5S 1A8, Canada.
| | - Soha Ahmadi
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, M5S 3H6, Canada.
| | - Kagan Kerman
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, M5S 3H6, Canada.
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Ahmadi S, Lotfi S, Afshari S, Kumar P, Ghasemi E. CORAL: Monte Carlo based global QSAR modelling of Bruton tyrosine kinase inhibitors using hybrid descriptors. SAR QSAR Environ Res 2021; 32:1013-1031. [PMID: 34875951 DOI: 10.1080/1062936x.2021.2003429] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 11/03/2021] [Indexed: 06/13/2023]
Abstract
Global QSAR modelling was performed to predict the pIC50 values of 233 diverse heterocyclic compounds as BTK inhibitors with the Monte Carlo algorithm of CORAL software using the DCW hybrid descriptors extracted from SMILES notations of molecules. The dataset of 233 BTK inhibitors was randomly split into training, invisible training, calibration and validation sets. The index of ideality of correlation was also applied to build and judge the predictability of the QSAR models. Eight global QSAR models based on the hybrid optimal descriptor using two target functions, i.e. TF1 (WIIC = 0) and TF2 (WIIC = 0.2) have been constructed. The statistical parameters of QSAR models computed by TF2 are more reliable and robust and were used to predict the pIC50 values. The model constructed for split 4 via TF2 is regarded as the best model and the numerical values of r2Train, r2Valid, Q2Train and Q2Valid are equal to 0.7981, 0.7429, 0.7898 and 0.6784, respectively. By internal and external validation techniques, the predictability and reliability of the designed models have been assessed. The structural attributes responsible for the increase and decrease of pIC50 of BTK inhibitors were also identified.
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Affiliation(s)
- S Ahmadi
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - S Lotfi
- Department of Chemistry, Payame Noor University (PNU), Tehran, Iran
| | - S Afshari
- Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - P Kumar
- Department of Chemistry, Kurukshetra University, Kurukshetra, Haryana, India
| | - E Ghasemi
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
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7
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Ahmad S, Hossain MN, Ahmadi S, Kerman K, Kraatz HB. Electrochemical distinction of neuronal and neuroblastoma cells via the phosphorylation of the cellular extracellular membrane. Anal Biochem 2021; 645:114434. [PMID: 34785194 DOI: 10.1016/j.ab.2021.114434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/10/2021] [Accepted: 10/21/2021] [Indexed: 11/20/2022]
Abstract
In this contribution we establish a proof of concept method for monitoring, quantifying and differentiating the extracellular phosphorylation of Human SHSY5Y undifferentiated neuronal cells and neuroblastoma cells by three prominent ectokinases PKA, PKC and Src. Herein it is demonstrated that a combination of different experimental techniques, including fluroesence microscopy, quartz crystal microscopy (QCM) and electrochemistry, can be used to detect extracellular phosphorylation levels of neuronal and neuroblastoma cells. Phosphorylation profiles of the three ectokinases, PKA, PKC and Src, were investigated using fluorescence microscopy and the number of phosphorylation sites per kinase was estimated using QCM. Finally, the phosphorylation of the extracellular membrane was determined using electrochemistry. Our results clearly demonstrate that the extracellular phosphorylation of neuronal cells differs significantly in terms of its phosphorylation profile from diseased neuroblastoma cells and the strength of surface electrochemical techniques in the differentiation process. We reveal that using electrochemistry, the percent compositions of neuronal and neuroblastoma cells can also be identified.
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Affiliation(s)
- S Ahmad
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - M N Hossain
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - S Ahmadi
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - K Kerman
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - H-B Kraatz
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada.
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8
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Ahmadi S, Ashrafi S, Yazdansetad F, Roshanshah N, Tarim UA, Gurler O. A computational modelling of low-energy gamma ray detection efficiency of a cylindrical NaI(Tl) detector. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2021.109581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Ghiasi T, Ahmadi S, Ahmadi E, Talei Bavil Olyai MR, Khodadadi Z. The index of ideality of correlation: QSAR studies of hepatitis C virus NS3/4A protease inhibitors using SMILES descriptors. SAR QSAR Environ Res 2021; 32:495-520. [PMID: 34074200 DOI: 10.1080/1062936x.2021.1925344] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 04/29/2021] [Indexed: 06/12/2023]
Abstract
Robust and reliable QSAR models were developed to predict half-maximal inhibitory concentration (IC50) values of hepatitis C virus NS3/4A protease inhibitors from the Monte Carlo technique. 524 HCV NS3/4A protease inhibitors were extracted from the scientific literature to create a reasonably large set. The models were developed using CORAL software by using two target functions namely target function 1 (TF1) without applying the index of ideality of correlation (IIC) and target function 2 (TF2) that uses IIC. The constructed models based on TF2 were statistically more significant and robust than the models based on TF1. The determination coefficients (r2) of training and test sets were 0.86 and 0.88 for the best split based on TF2. The promoters of the increase/decrease of activity were also extracted and interpreted in detail. The model interpretation results explain the role of different structural attributes in predicting the pIC50 values of hepatitis C virus NS3/4A protease inhibitors. Based on the mechanistic model interpretation results, eight new compounds were designed and their pIC50 values were predicted based on the average prediction of ten models.
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Affiliation(s)
- T Ghiasi
- Department of Chemistry, Faculty of Science, Islamic Azad University, South Tehran Branch, Tehran, Iran
| | - S Ahmadi
- Department of Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - E Ahmadi
- Department of Chemistry, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
| | - M R Talei Bavil Olyai
- Department of Chemistry, Faculty of Science, Islamic Azad University, South Tehran Branch, Tehran, Iran
| | - Z Khodadadi
- Department of Chemistry, Faculty of Science, Islamic Azad University, South Tehran Branch, Tehran, Iran
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Imran S, Ahmadi S, Kerman K. Electrochemical Biosensors for the Detection of SARS-CoV-2 and Other Viruses. Micromachines (Basel) 2021; 12:174. [PMID: 33578979 PMCID: PMC7916687 DOI: 10.3390/mi12020174] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/04/2021] [Accepted: 02/05/2021] [Indexed: 02/06/2023]
Abstract
The last few decades have been plagued by viral outbreaks that present some of the biggest challenges to public safety. The current coronavirus (COVID-19) disease pandemic has exponentiated these concerns. Increased research on diagnostic tools is currently being implemented in order to assist with rapid identification of the virus, as mass diagnosis and containment is the best way to prevent the outbreak of the virus. Accordingly, there is a growing urgency to establish a point-of-care device for the rapid detection of coronavirus to prevent subsequent spread. This device needs to be sensitive, selective, and exhibit rapid diagnostic capabilities. Electrochemical biosensors have demonstrated these traits and, hence, serve as promising candidates for the detection of viruses. This review summarizes the designs and features of electrochemical biosensors developed for some past and current pandemic or epidemic viruses, including influenza, HIV, Ebola, and Zika. Alongside the design, this review also discusses the detection principles, fabrication techniques, and applications of the biosensors. Finally, research and perspective of biosensors as potential detection tools for the rapid identification of SARS-CoV-2 is discussed.
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Affiliation(s)
- Saim Imran
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada; (S.I.); (S.A.)
| | - Soha Ahmadi
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada; (S.I.); (S.A.)
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - Kagan Kerman
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada; (S.I.); (S.A.)
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11
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Ahmadi S, Lotfi S, Kumar P. A Monte Carlo method based QSPR model for prediction of reaction rate constants of hydrated electrons with organic contaminants. SAR QSAR Environ Res 2020; 31:935-950. [PMID: 33179988 DOI: 10.1080/1062936x.2020.1842495] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 10/22/2020] [Indexed: 06/11/2023]
Abstract
The Monte Carlo algorithm was applied to formulate a robust quantitative structure-property relationship (QSPR) model to compute the reactions rate constants of hydrated electron values for a data set of 309 water contaminants containing 125 aliphatic and 184 phenyl-based chemicals. The QSPR models were computed with the hybrid optimal descriptors which were procured by combining the SMILES and hydrogen-suppressed molecular graph for both classes of compounds. Approximately 75% of the total experimental data set was randomly divided into training and invisible training sets, while approximately 25% was divided into calibration and validation sets. The authenticity and robustness of the developed QSPR models were also judged by the Index of Ideality of Correlation. In QSPR modelling of aliphatic compounds, the numerical values of r T r a i n i n g 2 , r V a l i d a t i o n 2 , Q T r a i n i n g 2 and Q V a l i d a t i o n 2 were in the range of 0.852-0.905, 0.815-0.894, 0.839-0.897 and 0.737-0.867, respectively. Whereas, in the QSPR modelling of phenyl-based compounds, the numerical values of r T r a i n i n g 2 , r V a l i d a t i o n 2 , Q T r a i n i n g 2 and Q V a l i d a t i o n 2 were in the range of 0.867-0.896, 0.852-0.865, 0.816-0.850 and 0.760-0.762, respectively. The structural attributes, which are promoters of l o g K e a q - increase/decrease are also extracted from the SMILES notation for mechanistic interpretation. These QSPR models can also be applied to compute the reaction rate constants of organic contaminants.
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Affiliation(s)
- S Ahmadi
- Department of Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University , Tehran, Iran
| | - S Lotfi
- Department of Chemistry, Payame Noor University (PNU) , Tehran, Iran
| | - P Kumar
- Department of Chemistry, Kurukshetra University , Kurukshetra, Haryana, India
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Javidfar M, Ahmadi S. QSAR modelling of larvicidal phytocompounds against Aedes aegypti using index of ideality of correlation. SAR QSAR Environ Res 2020; 31:717-739. [PMID: 32930630 DOI: 10.1080/1062936x.2020.1806922] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 08/04/2020] [Indexed: 06/11/2023]
Abstract
Aedes aegypti is the primary vector of several infectious viruses that cause yellow, dengue, chikungunya, and Zika fevers. Recently, plant-derived products have been tested as safe and eco-friendly larvicides against Ae. aegypti. The present study aimed to improve QSAR models for 62 larvicidal phytocompounds against Ae. aegypti via the Monte Carlo method based on the index of the ideality of correlation (IIC) criterion. The representation of structures was done with SMILES. Three splits were prepared randomly and three QSAR models were constructed using IIC target function. The molecular descriptors were selected from SMILES descriptors and the hydrogen-filled molecular graphs. The predictability of three models was evaluated on the validation sets, the r 2 of which was 0.9770, 0.8660, and 0.8565 for models 1 to 3, respectively. The statistical results of three randomized splits indicated that robust, simple, predictive, and reliable models were obtained for different sets. From the modelling results, important descriptors were identified to enhance and reduce the larvicidal activity of compounds. Based on the identified important descriptors, some new structures of larvicidal compounds were proposed. The larvicidal activity of novel molecules designed further was supported by docking studies. Using the simple QSAR model, one can predict pLC50 of new similarity larvicidal phytocompounds.
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Affiliation(s)
- M Javidfar
- Department of Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University , Tehran, Iran
| | - S Ahmadi
- Department of Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University , Tehran, Iran
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Ahmad S, Hossain MN, Ahmadi S, Kerman K, Kraatz HB. Electrochemical detection of neuronal extracellular phosphorylation by PKA, PKC and Src. Anal Biochem 2020; 608:113892. [PMID: 32810472 DOI: 10.1016/j.ab.2020.113892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/21/2020] [Accepted: 07/24/2020] [Indexed: 11/30/2022]
Abstract
The focus of this work described here is to establish a method for monitoring and quantifying the extracellular phosphorylation of Human SHSY5Y undifferentiated neuronal cells by three ectokinases PKA, PKC and Src; these are kinases that are known to be present in the extracellular matrix. Here is demonstrated that a combination of different experimental techniques, including microscopy and electrochemistry, can be used to detect extracellular phosphorylations. Phosphorylation profiles of the three ectokinases, PKA, PKC and Src, were investigated using fluorescence microscopy and the number of phosphorylation sites per kinase was estimated using QCM. Finally, the phosphorylation of the extracellular membrane was determined using electrochemistry. Our results clearly demonstrate the extracellular phosphorylation of neuronal cells and the strength of surface electrochemical techniques in the investigation of cellular phosphorylation.
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Affiliation(s)
- S Ahmad
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - M N Hossain
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - S Ahmadi
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - K Kerman
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - H-B Kraatz
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada.
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Ashuri T, Armani A, Jalilzadeh Hamidi R, Reasnor T, Ahmadi S, Iqbal K. Biomedical soft robots: current status and perspective. Biomed Eng Lett 2020; 10:369-385. [PMID: 32864173 PMCID: PMC7438463 DOI: 10.1007/s13534-020-00157-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 04/02/2020] [Accepted: 04/18/2020] [Indexed: 12/13/2022] Open
Abstract
This paper reviews the current status of soft robots in biomedical field. Soft robots are made of materials that have comparable modulus of elasticity to that of biological systems. Several advantages of soft robots over rigid robots are safe human interaction, ease of adaptation with wearable electronics and simpler gripping. We review design factors of soft robots including modeling, controls, actuation, fabrication and application, as well as their limitations and future work. For modeling, we survey kinematic, multibody and numerical finite element methods. Finite element methods are better suited for the analysis of soft robots, since they can accurately model nonlinearities in geometry and materials. However, their real-time integration with controls is challenging. We categorize the controls of soft robots as model-based and model-free. Model-free controllers do not rely on an explicit analytical or numerical model of the soft robot to perform actuation. Actuation is the ability to exert a force using actuators such as shape memory alloys, fluid gels, elastomers and piezoelectrics. Nonlinear geometry and materials of soft robots restrict using conventional rigid body controls. The fabrication techniques used for soft robots differ significantly from that of rigid robots. We survey a wide range of techniques used for fabrication of soft robots from simple molding to more advanced additive manufacturing methods such as 3D printing. We discuss the applications and limitations of biomedical soft robots covering aspects such as functionality, ease of use and cost. The paper concludes with the future discoveries in the emerging field of soft robots.
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Affiliation(s)
- T. Ashuri
- Department of Mechanical Engineering, Arkansas Tech University, 1811 N Boulder Ave, Russellville, AR 72801 USA
| | - A. Armani
- Department of Mechanical Engineering, San Jose State University, 1 Washington Square, San Jose, CA 95112 USA
| | - R. Jalilzadeh Hamidi
- Department of Electrical Engineering, Arkansas Tech University, 1811 N Boulder Ave, Russellville, AR 72801 USA
| | - T. Reasnor
- Department of Mechanical Engineering, Arkansas Tech University, 1811 N Boulder Ave, Russellville, AR 72801 USA
| | - S. Ahmadi
- Department of Orthopedic Surgery, University of Arkansas for Medical Sciences, 10815 Colonel Glenn Rd, Little Rock, AR 72204 USA
| | - K. Iqbal
- Department of Systems Engineering, University of Arkansas at Little Rock, 2801 S University Ave, Little Rock, AR 72204 USA
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Hassan Q, Ahmadi S, Kerman K. Recent Advances in Monitoring Cell Behavior Using Cell-Based Impedance Spectroscopy. Micromachines (Basel) 2020; 11:E590. [PMID: 32545753 PMCID: PMC7345285 DOI: 10.3390/mi11060590] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/05/2020] [Accepted: 06/09/2020] [Indexed: 12/24/2022]
Abstract
Cell-based impedance spectroscopy (CBI) is a powerful tool that uses the principles of electrochemical impedance spectroscopy (EIS) by measuring changes in electrical impedance relative to a voltage applied to a cell layer. CBI provides a promising platform for the detection of several properties of cells including the adhesion, motility, proliferation, viability and metabolism of a cell culture. This review gives a brief overview of the theory, instrumentation, and detection principles of CBI. The recent applications of the technique are given in detail for research into cancer, neurodegenerative diseases, toxicology as well as its application to 2D and 3D in vitro cell cultures. CBI has been established as a biophysical marker to provide quantitative cellular information, which can readily be adapted for single-cell analysis to complement the existing biomarkers for clinical research on disease progression.
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Affiliation(s)
| | | | - Kagan Kerman
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada; (Q.H.); (S.A.)
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16
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Affiliation(s)
- Mohammadreza Jalali Nadoushan
- Department of Pathology, Shahed University, Tehran, Iran.,Editor-in-chief, Iranian Journal of Pathology, Tehran, Iran
| | - Soha Ahmadi
- Department of Chemistry, University of Toronto, Toronto, Canada
| | - Paniz Jalali Nadoushan
- Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, Canada
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17
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Ouyang X, Wang X, Kraatz HB, Ahmadi S, Gao J, Lv Y, Sun X, Huang Y. Correction: A Trojan horse biomimetic delivery strategy using mesenchymal stem cells for PDT/PTT therapy against lung melanoma metastasis. Biomater Sci 2020; 8:1181. [PMID: 31932834 DOI: 10.1039/d0bm90006k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Correction for 'A Trojan horse biomimetic delivery strategy using mesenchymal stem cells for PDT/PTT therapy against lung melanoma metastasis' by Xumei Ouyang et al., Biomater. Sci., 2020, DOI: 10.1039/c9bm01401b.
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Affiliation(s)
- Xumei Ouyang
- Department of Pharmacy, Zhejiang University City College, Hangzhou 310015, China. and Department of Pharmacy, School of Ophthalmology & Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325035, China and Department of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xiaoling Wang
- Department of Pharmacy, Zhejiang University City College, Hangzhou 310015, China. and Department of Pharmacy, School of Ophthalmology & Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325035, China
| | - Heinz-Bernhard Kraatz
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada
| | - Soha Ahmadi
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada
| | - Jianqing Gao
- Department of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yuanyuan Lv
- Department of Pharmacy, Zhejiang University City College, Hangzhou 310015, China.
| | - Xiaoyi Sun
- Department of Pharmacy, Zhejiang University City College, Hangzhou 310015, China.
| | - Yongzhuo Huang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Rd, Shanghai, 201203, China.
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18
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Ouyang X, Wang X, Kraatz HB, Ahmadi S, Gao J, Lv Y, Sun X, Huang Y. A Trojan horse biomimetic delivery strategy using mesenchymal stem cells for PDT/PTT therapy against lung melanoma metastasis. Biomater Sci 2019; 8:1160-1170. [PMID: 31848537 DOI: 10.1039/c9bm01401b] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Mesenchymal stem cell (MSC)-based biomimetic delivery has been actively explored for drug accumulation and penetration into tumors by taking advantage of the tumor-tropic and penetration properties of MSCs. In this work, we further demonstrated the feasibility of MSC-mediated nano drug delivery, which was characterized by the "Trojan horse"-like transport via an endocytosis-exocytosis-endocytosis process between MSCs and cancer cells. Chlorin e6 (Ce6)-conjugated polydopamine nanoparticles (PDA-Ce6) were developed and loaded into the MSCs. Phototherapeutic agents are safe to the MSCs, and their very low dark toxicity causes no impairment of the inherent properties of MSCs, including tumor-homing ability. The MSCs loaded with PDA-Ce6 (MSC-PDA-Ce6) were able to target and penetrate into tumors and exocytose 60% of the payloads in 72 h. The released PDA-Ce6 NPs could penetrate deep and be re-endocytosed by the cancer cells. MSC-PDA-Ce6 tended to accumulate in the lungs and delivered PDA-Ce6 into the tumors after intravenous injection in the mouse model with lung melanoma metastasis. Phototoxicity can be selectively triggered in the tumors by sequentially treating with near-infrared irradiation to induce photodynamic therapy (PDT) and photothermal therapy (PTT). The MSC-based biomimetic delivery of PDA-Ce6 nanoparticles is a potential method for dual phototherapy against lung melanoma metastasis.
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Affiliation(s)
- Xumei Ouyang
- Department of Pharmacy, Zhejiang University City College, Hangzhou 310015, China. and Department of Pharmacy, School of Ophthalmology & Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325035, China and Department of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xiaoling Wang
- Department of Pharmacy, Zhejiang University City College, Hangzhou 310015, China. and Department of Pharmacy, School of Ophthalmology & Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325035, China
| | - Heinz-Bernhard Kraatz
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada
| | - Soha Ahmadi
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada
| | - Jianqing Gao
- Department of Pharmacy, School of Ophthalmology & Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325035, China
| | - Yuanyuan Lv
- Department of Pharmacy, Zhejiang University City College, Hangzhou 310015, China.
| | - Xiaoyi Sun
- Department of Pharmacy, Zhejiang University City College, Hangzhou 310015, China.
| | - Yongzhuo Huang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Rd, Shanghai, 201203, China.
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Abstract
OBJECTIVE Brain computer interfaces (BCIs) are slowly making their appearance on the consumer market, accompanied by a higher popularity among the general public. This new group of users requires easy-to-use headsets with robustness to non-precise placement. In this paper, an optimized fixed montage EEG headset for VEP BCIs is proposed. APPROACH The proposed layout covers only the most relevant area with large sensors to account for slight misplacement. To obtain large sensors, without having them physically available, we tie multiple sensors together and simulate the effect by averaging the signal of multiple sensors. MAIN RESULTS In simulations based on recorded 256-channel EEG data, it is shown that a circular center-surround configuration with sensor tying, leading to only eight channels covering a large part of the occipital lobe, can provide high performance and good robustness to misplacement. Automatically optimized layouts were unable to achieve better performance, demonstrating the utility of this manual design. Finally, the performance and benefits of sensor tying in the manual design are then validated in a physical experiment. SIGNIFICANCE The resulting proposed layout fulfills most requirements of an easy to use consumer EEG headset.
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Affiliation(s)
- S Ahmadi
- Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, The Netherlands
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20
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Ahmadi S, Azhari SJ. A LP, Very High-CMRR, Wide-Bandwidth FDCCII-Based CMIA Adapted to Both Current and Voltage Inputs. Arab J Sci Eng 2019. [DOI: 10.1007/s13369-018-3601-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Ahmadi S, Zhu S, Sharma R, Wilson DJ, Kraatz HB. Interaction of metal ions with tau protein. The case for a metal-mediated tau aggregation. J Inorg Biochem 2019; 194:44-51. [DOI: 10.1016/j.jinorgbio.2019.02.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 02/05/2019] [Accepted: 02/10/2019] [Indexed: 12/18/2022]
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22
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Ahmadi S, Zhu S, Sharma R, Wu B, Soong R, Dutta Majumdar R, Wilson DJ, Simpson AJ, Kraatz HB. Aggregation of Microtubule Binding Repeats of Tau Protein is Promoted by Cu 2. ACS Omega 2019; 4:5356-5366. [PMID: 31001602 PMCID: PMC6463671 DOI: 10.1021/acsomega.8b03595] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 03/05/2019] [Indexed: 06/09/2023]
Abstract
Understanding the factors that give rise to tau aggregation and reactive oxygen species (ROS) is the key aspect in Alzheimer's disease pathogenesis. Microtubule (MT) binding repeats of tau protein were suggested to play a critical role in tau aggregation. Here, we show that the interaction of Cu2+ with full-length MT binding repeats R1-R4 leads to the aggregation, and a Cys-based redox chemistry is critically involved in tau aggregation leading to disulfide-bridge dimerization of R2 and R3 and further aggregation into a fibrillar structure. Notably, ascorbate and glutathione, the most abundant antioxidants in neurons, cannot prevent the effect of Cu2+ on R2 and R3 aggregation. Detailed ESI-MS and NMR experiments demonstrate the interaction of Cu2+ with MT binding repeats. We show that redox activity of copper increases when bound to the MT repeats leading to ROS formation, which significantly contribute to cellular damage and neuron death. Results presented here provide new insights into the molecular mechanism of tau aggregation and ROS formation and suggest a new target domain for tau aggregation inhibitors.
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Affiliation(s)
- Soha Ahmadi
- Department
of Physical and Environmental Science, University
of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 1A1, Canada
| | - Shaolong Zhu
- Chemistry
Department, York University, Toronto, Ontario M3J1P3, Canada
- The
Centre for Research in Mass Spectrometry, York University, 4700 Keele Street, Toronto, Ontario M3J1P3, Canada
| | - Renu Sharma
- Department
of Physical and Environmental Science, University
of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Bing Wu
- Department
of Physical and Environmental Science, University
of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Ronald Soong
- Department
of Physical and Environmental Science, University
of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 1A1, Canada
| | - R. Dutta Majumdar
- Department
of Physical and Environmental Science, University
of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Derek J. Wilson
- Chemistry
Department, York University, Toronto, Ontario M3J1P3, Canada
- The
Centre for Research in Mass Spectrometry, York University, 4700 Keele Street, Toronto, Ontario M3J1P3, Canada
| | - Andre J. Simpson
- Department
of Physical and Environmental Science, University
of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 1A1, Canada
| | - Heinz-Bernhard Kraatz
- Department
of Physical and Environmental Science, University
of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 1A1, Canada
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23
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Tian S, You W, Shen Y, Gu X, Ge M, Ahmadi S, Ahmad S, Kraatz HB. Facile synthesis of silver-rich Au/Ag bimetallic nanoparticles with highly active SERS properties. NEW J CHEM 2019. [DOI: 10.1039/c9nj02879j] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A one-pot route to the synthesis of Au/Ag bimetallic nanoparticles with a high SERS activity for detection of proteins at low concentration.
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Affiliation(s)
- Shu Tian
- School of Chemistry and Chemical Engineering
- Nantong University
- Nantong 226019
- P. R. China
- Department of Physical and Environmental Science
| | - Wenjing You
- School of Chemistry and Chemical Engineering
- Nantong University
- Nantong 226019
- P. R. China
| | - Yi Shen
- School of Chemistry and Chemical Engineering
- Nantong University
- Nantong 226019
- P. R. China
| | - Xuefang Gu
- School of Chemistry and Chemical Engineering
- Nantong University
- Nantong 226019
- P. R. China
- Department of Physical and Environmental Science
| | - Ming Ge
- School of Chemistry and Chemical Engineering
- Nantong University
- Nantong 226019
- P. R. China
| | - Soha Ahmadi
- Department of Physical and Environmental Science
- University of Toronto at Scarborough
- Toronto
- Canada
| | - Syed Ahmad
- Department of Physical and Environmental Science
- University of Toronto at Scarborough
- Toronto
- Canada
| | - Heinz-Bernhard Kraatz
- Department of Physical and Environmental Science
- University of Toronto at Scarborough
- Toronto
- Canada
- Department of Chemistry
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Ahmadi S, Akbari A. Prediction of the adsorption coefficients of some aromatic compounds on multi-wall carbon nanotubes by the Monte Carlo method. SAR QSAR Environ Res 2018; 29:895-909. [PMID: 30332923 DOI: 10.1080/1062936x.2018.1526821] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 09/18/2018] [Indexed: 06/08/2023]
Abstract
In this investigation, quantitative structure-property relationship (QSPR) modelling of adsorption coefficients of 69 aromatic compounds on multi-wall carbon nanotubes (MWCNTs) was studied using the Monte Carlo method. QSPR models were calculated with CORAL software, and optimal descriptors were calculated with the simplified molecular input line entry system (SMILES) and hydrogen-suppressed molecular graphs (HSGs). The aromatic compound data set was randomly split into training, invisible training, calibration and validation sets. Analysis of three probes of the Monte Carlo optimization with three random splits was done. The results from three random splits displayed robust, very simple, predictable and reliable models for the training, invisible training, calibration and validation sets with a coefficient of determination (r2) equal to 0.9463-0.8528, 0.9020-0.8324, 0.9606-0.9178 and 0.9573-0.8228, respectively. As a result, the models obtained help to identify the hybrid descriptors for the increase and the decrease of the adsorption coefficient of aromatic compounds on MWCNTs. This simple QSPR model can be used for the prediction of the adsorption coefficient of numerous aromatic compounds on MWCNTs.
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Affiliation(s)
- S Ahmadi
- a Department of Chemistry , Kermanshah Branch, Islamic Azad University , Kermanshah , Iran
| | - A Akbari
- a Department of Chemistry , Kermanshah Branch, Islamic Azad University , Kermanshah , Iran
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Sheikholeslami-Vatani D, Ahmadi S, Chehri B, Tadibi V. The effect of changes in concentric-eccentric contraction time ratio on hormonal response to resistance exercise in trained men. Sci Sports 2018. [DOI: 10.1016/j.scispo.2017.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Shokrollahi A, Ahmadi S. Determination of trace amounts of Brown HT as a food dye by a CPE-scanometry method. Journal of Taibah University for Science 2018. [DOI: 10.1016/j.jtusci.2016.04.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
| | - S. Ahmadi
- Department of Chemistry, Yasouj University Yasouj Iran
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27
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Anell-Olofsson M, Ahmadi S, Lönnqvist PA, Eksborg S, von Horn H, Bartocci M. Plasma concentrations of alpha-1-acid glycoprotein in preterm and term newborns: influence of mode of delivery and implications for plasma protein binding of local anaesthetics. Br J Anaesth 2018; 121:427-431. [PMID: 30032881 DOI: 10.1016/j.bja.2018.01.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 12/08/2017] [Accepted: 02/07/2018] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Alpha-1-acid glycoprotein (AAGP) is an acute-phase protein with high affinity for amide local anaesthetics (LAs), and a major determinant of free and potentially toxic concentrations of LAs in plasma. Neonates are known to have lower plasma concentrations of AAGP than adults, and are at risk of developing high free concentrations of LAs. Data regarding AAGP in newborns are so far sparse. The aim of this study was to determine plasma concentrations of AAGP after delivery of preterm and term infants, and to investigate correlations between AAGP and gestational age, birth weight, gender, and mode of delivery. METHODS In this prospective observational study, blood was sampled from umbilical cords of 70 newborn infants born at gestational weeks 27-42 immediately after delivery. Blood samples were subsequently analysed for AAGP plasma concentrations with an immunoturbidimetric assay. RESULTS We found higher concentrations of AAGP in infants born vaginally compared with those who were delivered by elective Caesarean section [median (inter-quartile range) 0.189 g litre-1 (0.142-0.263 g litre-1) vs 0.110 g litre-1 (0.094-0.157 g litre-1; P=0.0003)], respectively. There was a correlation between gestational age and AAGP concentrations (r=0.50; P=0.011), with significantly higher concentrations in the more mature infants. Gender and birth weight did not appear to influence the plasma concentrations of AAGP. CONCLUSIONS Alpha-1-acid glycoprotein concentrations in newborns are influenced both by gestational age and mode of delivery. Thus, when dosing local anaesthetics in a parturient, these factors should be taken into account.
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Affiliation(s)
- M Anell-Olofsson
- Department of Paediatric Anaesthesia, Intensive Care and ECMO Services, Sweden; Department of Women's and Children's Health, Karolinska Institutet, Sweden.
| | - S Ahmadi
- Department of Women's and Children's Health, Karolinska Institutet, Sweden
| | - P A Lönnqvist
- Department of Paediatric Anaesthesia, Intensive Care and ECMO Services, Sweden; Department of Physiology and Pharmacology, Karolinska Institutet, Sweden
| | - S Eksborg
- Department of Women's and Children's Health, Karolinska Institutet, Sweden; Department of Paediatric Oncology, Sweden
| | - H von Horn
- Division of Clinical Chemistry, Department of Laboratory Medicine, Sweden
| | - M Bartocci
- Department of Women's and Children's Health, Karolinska Institutet, Sweden; Department of Neonatology, Karolinska University Hospital, Stockholm, Sweden
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Hosseinian A, Vessally E, Bekhradnia A, Ahmadi S, Kheirollahi Nezhad PD. Interaction of α-Cyano-4-hydroxycinnamic Acid Drug with Inorganic BN Nanocluster: A Density Functional Study. J Inorg Organomet Polym Mater 2018. [DOI: 10.1007/s10904-018-0778-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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29
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Mastikhin IV, Bade KM, Ahmadi S. A rapid magnetization preparation for MRI measurements of sprays. J Magn Reson 2017; 283:52-60. [PMID: 28881233 DOI: 10.1016/j.jmr.2017.08.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 08/25/2017] [Accepted: 08/26/2017] [Indexed: 06/07/2023]
Abstract
The process of spray atomization, i.e., the transformation of a continuous liquid jet into μm-sub-mm sized droplets, is ubiquitous in industry yet quite complex to analyze theoretically and study experimentally. One of the main strengths of MRI is its ability to sensitize spatially-resolved NMR signal to a wide variety of physical and chemical parameters. However, standard preparation schemes are difficult to employ for studies of sprays due to sprays' fast speeds (>10-20m/s). In addition, sprays are usually low-density systems, leading to a poor SNR and a need for massive signal averaging and long acquisition time. In this paper, we reduced the interval between the preparation and the readout stages by performing SPI encoding on the rising gradients. This also enabled the use of 90-degree flip angles to maximize the spray signal and saturate the stationary water signal while avoiding unwanted slice-selection. The use of gradients during preparation stage was eliminated due to their time-consuming rise and stabilization times limiting possible preparation schemes to a combination of RF pulses and delays. The two preparation schemes presented here are Time-of-Flight (TOF) and T1ρ-weighting schemes. The total duration of the sequence (without TR) was 240-1100μs for the TOF and 410μs for T1ρ. The T1ρ prepared images of the near-atomization region (11 spin-locking frequencies, 0-15kHz) showed a strong signal attenuation at higher frequencies. In series of TOF images the clearly noticeable displacement of the liquid parcel can be utilized to measure spray speeds.
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Affiliation(s)
- I V Mastikhin
- Department of Physics, University of New Brunswick, Fredericton E3B 5A3, NB, Canada.
| | - K M Bade
- Spraying Systems Co., Spray Analysis and Research Services, Wheaton, IL, USA
| | - S Ahmadi
- Department of Physics, University of New Brunswick, Fredericton E3B 5A3, NB, Canada
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Ahmadi S, Ebralidze II, She Z, Kraatz HB. Electrochemical studies of tau protein-iron interactions—Potential implications for Alzheimer’s Disease. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.03.175] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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31
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Nasiri Kalmarzi R, Ataee P, Mansori M, Moradi G, Ahmadi S, Kaviani Z, Khalafi B, Kooti W. Serum levels of adiponectin and leptin in asthmatic patients and its relation with asthma severity, lung function and BMI. Allergol Immunopathol (Madr) 2017; 45:258-264. [PMID: 28411906 DOI: 10.1016/j.aller.2016.09.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 09/12/2016] [Accepted: 09/21/2016] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Asthma is one of the diseases which has a high prevalence in developed and developing countries. The relationship between asthma and obesity has always been focused by researchers. In this field, adipokines, especially adiponectin and leptin have highly attended by the scientist. The aim of this study was to determine the serum level of adiponectin, leptin and the leptin/adiponectin ratio in asthmatic patients and its relationship with disease severity, lung function and BMI (body mass index). METHODS In this cross-sectional study, 90 asthmatic women admitted to the tertiary referral hospital in Kurdistan province - Iran, were examined. First, BMI was measured and then pulmonary function tests were performed in all asthmatics patient. Forced expiratory volume in 1s (FEV1), forced vital capacity (FVC), and FEV1/FVC, were measured. At the end, blood samples were collected and serum level of adiponectin and leptin were measured by ELISA method. RESULT Serum leptin and leptin/adiponectin levels correlated positively with asthma severity and BMI (p=0.0001), but there was no correlation between adiponectin level with asthma severity and BMI (p>0.05), also serum leptin and leptin/adiponectin levels inversely correlated with FEV1 and FVC in patient (p=0.0001). CONCLUSION Asthma is linked with obesity, and there is an association between asthma severity and BMI with serum leptin and leptin/adiponectin levels, but our results do not support a significant role of adiponectin in obesity or asthma.
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She Z, Topping K, Ma T, Zhao T, Zhou W, Kamal A, Ahmadi S, Kraatz HB. Detection of the Lipopeptide Pam3CSK4 Using a Hybridized Toll-like Receptor Electrochemical Sensor. Anal Chem 2017; 89:4882-4888. [DOI: 10.1021/acs.analchem.6b04799] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhe She
- Department
of Chemistry and Chemical Engineering, Royal Military College of Canada, P.O. Box
17000, Station Forces, Kingston, Ontario K7K 7B4, Canada
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Kristin Topping
- Department
of Chemistry and Chemical Engineering, Royal Military College of Canada, P.O. Box
17000, Station Forces, Kingston, Ontario K7K 7B4, Canada
| | - Tianxiao Ma
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Tiantian Zhao
- Department
of Immunology, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Wenxia Zhou
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Ajar Kamal
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Soha Ahmadi
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - Heinz-Bernhard Kraatz
- Department
of Chemistry and Chemical Engineering, Royal Military College of Canada, P.O. Box
17000, Station Forces, Kingston, Ontario K7K 7B4, Canada
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
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Karamali M, Dadkhah F, Sadrkhanlou M, Jamilian M, Ahmadi S, Tajabadi-Ebrahimi M, Jafari P, Asemi Z. Effects of probiotic supplementation on glycaemic control and lipid profiles in gestational diabetes: A randomized, double-blind, placebo-controlled trial. Diabetes & Metabolism 2016; 42:234-41. [DOI: 10.1016/j.diabet.2016.04.009] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 04/16/2016] [Accepted: 04/22/2016] [Indexed: 12/28/2022]
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Almaraashi M, John R, Hopgood A, Ahmadi S. Learning of interval and general type-2 fuzzy logic systems using simulated annealing: Theory and practice. Inf Sci (N Y) 2016. [DOI: 10.1016/j.ins.2016.03.047] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ahmadi S, Peymanfard M. The effect of social capital on improving productivity of human resources in the project of engineering, procurement and construction Bandar Abbas gas condensate refinery. J Fundam and Appl Sci 2016. [DOI: 10.4314/jfas.v8i2s.72] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Ahmadi S, Sharifi M, Salehi R. Locked nucleic acid inhibits miR-92a-3p in human colorectal cancer, induces apoptosis and inhibits cell proliferation. Cancer Gene Ther 2016; 23:199-205. [PMID: 27199220 DOI: 10.1038/cgt.2016.10] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 03/02/2016] [Accepted: 03/02/2016] [Indexed: 12/13/2022]
Abstract
MicroRNAs (miRNAs) are a type of small noncoding RNAs that have a vital role in basic biological processes such as cellular growth, division and apoptosis. A change in the expression of miRNAs can induce many diseases. Recently, the role of miRNA in some of the cancers as a tumor suppressor and oncogene has been recognized. Several studies have proved that miR-92a-3p acts as an oncogene in colorectal cancer (CRC). We studied CRC by inhibiting miR-92a-3p in SW48 cells (human colorectal cancer cell line) that were transfected with locked nucleic acid (LNA). At different times, the expression level of miR-92a-3p, cell vitality, apoptosis and necrosis were studied by qRT-PCR, MTT, Annexin-V and propidiumiodide. Our results showed that the expression of miR-92a-3p and proliferation of SW48 cells were decreased, and also a high percentage of SW48 cells were exposed to apoptosis and necrosis (P⩽0.005). Our study showed that the inhibition of miR-92a-3p with LNA inhibited cell proliferation and induced apoptosis and necrosis in CRC.
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Affiliation(s)
- S Ahmadi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - M Sharifi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - R Salehi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Delshad V, Shemshad H, Moradian M, Ahmadi S, Malkyan L, Sabzalizadeh S. The Effect of Applying Global Positioning System in Ambulances on Response Time of Tehran Emergency Medical Service. HDQ 2016. [DOI: 10.15412/j.hdq.09010302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Kargar S, Shiryazdi SM, Zare M, Mirshamsi MH, Ahmadi S, Neamatzadeh H. Comparison of postoperative short-term complications after laparoscopic transabdominal preperitoneal (TAPP) versus Lichtenstein tension free inguinal hernia repair: a randomized trial study. MINERVA CHIR 2015; 70:83-89. [PMID: 25017958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
AIM The aim of this randomized trial was to compare short-term postoperative complications of laparoscopic transabdominal preperitoneal (TAPP) and Lichtenstein tension free hernia repair. METHODS A total of 120 patients who went inguinal hernia repair at Shahid Sadoughi university training hospital from April 2011 to August 2013 were randomized into two TAPP (N.=60) and Lichtenstein (N.=60) repair group. Follow-up occurred within 6 weeks. The postoperative assessments included pain score (VAS), hematoma/seroma, urinary retention, wound infection incidence, and duration of hospital stay. RESULTS Pain was the most common symptoms in both groups. The TAPP group patients significantly had experienced less postoperative pain than the Lichtenstein group in all moments (P<0.05). TAPP group had lower incidence of hematoma (TAPP, 6.6% vs. Lichtenstein 13.3%; P=0.67), seroma (TAPP 10% vs. Lichtenstein 13.3%; P=1.00), and infection (TAPP 0 vs. Lichtenstein 1.6%; P=0.67). However, no differences between the 2 groups were found in terms of postoperative complications. In TAPP group mean of hospital stay significantly was less than Lichtenstein group (TAPP, 8.13±2.19 vs. Lichtenstein, 13.15±1.5 days; P<0.001). CONCLUSION The laparoscopic TAPP repair is safer and less complicated approach to inguinal hernia repair. The two main short-term advantages of the laparoscopic TAPP repair with the tension free Lichtenstein repair were less postoperative pain and earlier return to the normal life activities. No difference was seen in overall complications.
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Affiliation(s)
- S Kargar
- Department of Surgery, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran -
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Khamoushi F, Ahmadi S, Karami-Matin B, Ahmadi-Jouybari T, Mirzaei-Alavijeh M, Mahboubi M, Ataee M. Prevalence and Socio-Demographic Characteristics Related to Stress, Anxiety, and Depression among Patients with Major Tha-lassemia in the Kermanshah County. ACTA ACUST UNITED AC 2015. [DOI: 10.15412/j.jbtw.01040304] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Ahmadi S, Karami Z, Mohammadian A, Khosrobakhsh F, Rostamzadeh J. Cholestasis induced antinociception and decreased gene expression of MOR1 in rat brain. Neuroscience 2015; 284:78-86. [DOI: 10.1016/j.neuroscience.2014.08.063] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Revised: 08/10/2014] [Accepted: 08/21/2014] [Indexed: 01/08/2023]
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Cornelius J, Slotty P, Ahmadi S, Mühmer M, Steiger H, Bostelmann R. Management of Plasmocytomas of the Craniocervical Junction with Early Stabilization. Skull Base Surg 2014. [DOI: 10.1055/s-0034-1384189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Bidermane I, Lüder J, Boudet S, Zhang T, Ahmadi S, Grazioli C, Bouvet M, Rusz J, Sanyal B, Eriksson O, Brena B, Puglia C, Witkowski N. Experimental and theoretical study of electronic structure of lutetium bi-phthalocyanine. J Chem Phys 2013; 138:234701. [DOI: 10.1063/1.4809725] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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Ahmadi S, Mirzaei K, Hossein-Nezhad A, Keshavarz SA, Ahmadivand Z. Resting energy expenditure may predict the relationship between obesity and susceptibility to depression disorders. Minerva Med 2013; 104:207-213. [PMID: 23514997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
AIM The aim of the current research was to investigate the association between depressed mood and resting energy expenditure (REE) in a representative sample of obese women. METHODS Fasting blood sample was collected from 254 obese women to determine biochemical indicators. Body composition was measured using body composition analyzer. REE was measured by means of indirect calorimetry. RESULTS Comparison between depressed group and healthy obese women demonstrated that the mean of body mass index, fat percent, fat mass, visceral fat and triglyceride were higher in women with depressed mood. CONCLUSION The level of REE/kg was significantly low in depressed obese women compared to healthy subjects.
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Affiliation(s)
- S Ahmadi
- Tehran University of Medical Sciences, Tehran, Iran
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Abstract
Rehabilitation is a major goal for children with cerebral palsy, although the potential to enhance cardio-respiratory fitness in such individuals remains unclear. This study thus compared current cardio-respiratory status between children with cerebral palsy and able-bodied children, and examined the ability to enhance the cardio-respiratory fitness of children with cerebral palsy by cycle ergometer training. 10 children with cerebral palsy (Gross Motor Function Classification System levels I and II) participated in thrice-weekly 30 min cycle ergometer training sessions for 8 weeks (mean age: 14.2±1.9 yrs). 10 additional subjects with cerebral palsy (mean age: 14.2±1.8 yrs) and 10 able-bodied subjects (mean age: 14.1±2.1 yrs) served as controls, undertaking no training. All subjects undertook a progressive cycle ergometer test of cardio-respiratory fitness at the beginning and end of the 8-week period. Cardio-respiratory parameters [oxygen intake V˙O2), ventilation V ˙ E) and heart rate (HR)] during testing were measured by Cosmed K4 b gas analyzer. The children with cerebral palsy who engaged in aerobic training improved their peak oxygen consumption, heart rate and ventilation significantly (p<0.05) and they also showed a non-significant trend to increased peak power output. In conclusion, children with cerebral palsy can benefit significantly from cardio-respiratory training, and such training should be included in rehabilitation programs.
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Affiliation(s)
- A L Nsenga
- UFR-STAPS, Université de Picardie, AMIENS, France.
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Ahmadi S, Mirzaei K, Hossein-Nezhad A, Shariati G. Vitamin D receptor FokI genotype may modify the susceptibility to schizophrenia and bipolar mood disorder by regulation of dopamine D1 receptor gene expression. Minerva Med 2012; 103:383-391. [PMID: 23042374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
AIM This study is designed to test association of FOKI polymorphism in Vitamin D receptor (VDR) gene and its potential effect on expression of dopamine D1 receptor in schizophrenia and bipolar mood disorder as well as in healthy individuals. METHODS In this case-control study 196 patient with schizophrenia, 119 patients with bipolar mood disorder and 192 healthy individuals as the control group were recruited. All psychiatric disorders were diagnosed according to DSM IV criteria. Healthy control group denied any family history of such disorders. FOKI was genotyped by means of PCR-RFLP method. The mRNA was extracted from the peripheral blood mononuclear cells (PBMC) and the cDNA was synthesized. RESULTS Frequency of ff genotype was more common in patients with bipolar disorders compared to the healthy control group (Odds ratio=1.84, 95% CI; 0.81 to 4.17) with increased relative risk (Relative risk=1.31, CI 95%; 0.86 to 1.99). There were significant differences between relative expressions of dopamine D1 receptor gene in various genotypes. Our results indicated that the ff genotype was associated with lower expression of dopamine D1 receptor gene. CONCLUSION VDR as a nuclear receptor may contribute to bipolar disorders via modification of the expression of the neurotransmitters receptor such as dopamine.
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Affiliation(s)
- S Ahmadi
- Tehran University of Medical Sciences, Tehran, Iran.
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Ahmadi S, Manteghian M, Kazemian H, Rohani S, Towfighi Darian J. Synthesis of silver nano catalyst by gel-casting using response surface methodology. POWDER TECHNOL 2012. [DOI: 10.1016/j.powtec.2012.05.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Mirzaei K, Ahmadi S, Hossein-Nezhad A, Mokhtari F. Potential role of OPG/RANKL system and FokI genotypes in pathogenesis and clinical manifestations in multiple sclerosis. Minerva Med 2012; 103:313-321. [PMID: 22805623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
AIM The OPG/RANKL has identified role in immune system via T-cell-activating cytokines. Considering that immune mechanisms play a key role in the pathogenesis of MS, OPG/RANKL might be importance in the underlying mechanism of the disease. The aim of this study is to measure plasma levels of OPG and RANKL as well as to analyze VDR FokI polymorphism (rs2228570) in MS patients and healthy individuals to detect any potential correlation. METHODS We included a total of 397 participants, 105 of them suffering from two different types of MS, namely relapsing and remitting and secondary progressive multiple sclerosis. VDR genotyping was performed using PCR-RFLP method. RESULTS The results showed differences in the plasma levels of OPG and RANKL between patients and the healthy control group that were statistically significant. We found higher plasma levels of OPG and lower RANKL concentrations in RRMS patients in comparison with SPMS types of the disease. We detected higher plasma levels of OPG and lower levels of RANKL in subjects with F allele compared to those with f allele in healthy subjects. However, contradicting results were observed when patients with MS were analyzed. We detected lower plasma levels of OPG and higher RANKL concentrations in patients with F allele in comparison with those with f allele. CONCLUSION This might define a role for FokI polymorphism and OPG/RANKL system in the pathogenesis and progression of multiple sclerosis with further practical applications.
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Affiliation(s)
- K Mirzaei
- Tehran University of Medical Sciences, Tehran, Iran
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Zarrindast M, Ghiasvand M, Rezayof A, Ahmadi S. The amnesic effect of intra-central amygdala administration of a cannabinoid CB1 receptor agonist, WIN55,212-2, is mediated by a beta-1 noradrenergic system in rat. Neuroscience 2012; 212:77-85. [DOI: 10.1016/j.neuroscience.2012.04.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Revised: 03/31/2012] [Accepted: 04/04/2012] [Indexed: 10/28/2022]
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Hashemi S, Alikhani MY, Seif-Rabiee MA, Ahmadi S. Comparison of nasal carriage of Staphylococcus aureus and its antimicrobial resistance in various grades of medical students. Int J Infect Dis 2012. [DOI: 10.1016/j.ijid.2012.05.571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Abstract
Natural Killer (NK) cells are thought to develop from common lymphoid progenitors in the bone marrow. Even though thymus is not essential for NK cell development, T-cell/natural killer-cell (T/NK) precursors, DN1 (CD44+CD25-) and DN2 (CD44+CD25+) when cultured on an OP9 stroma, give rise to some NK1.1 cells. Genes of the Schlafen (Slfn) family are involved in hematopoietic and immune processes. The contribution of the Slfn genes in NK cell development from Double Negative (DN) cells is unknown. We transduced DN1 and DN2 progenitors prepared from C57BL/6 (B6) mouse thymus with Schlafen 1 (Slfnl) and Schlafen 2 (Slfn2) genes using Mig retroviral vector containing the Green Fluorescent Protein (GFP) gene and cultured those transduced progenitors on OP9 and OP9 stroma expressing the Notch ligand Delta-like 1 (OP9-DL 1) with appropriate cytokines to see if they affect generating NK and T-cells differently. Maturation of both NK and T cells from immature T/NK thymocytes hampered by Slfn1 and Slfn2 transduction but we got a small number of Slfn1 and Slfn2 expressing cells upon culture of transduced DN progenitors on stroma cells. There was no difference between Slfn1 expressing (GFP+) and none expressing T cells regarding CD3 expression but all mature NK cells were from Slfn1 negative population. Slfn2 completely blocked maturation of T cells but there was no difference between Slfn2 expressing and none expressing NK cells. Based on our findings both Slfn1 and Slfn2 interfere with maturation of DN2 progenitors but T cell development is more sensitive to Slfn2 expression than NK cell.
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Affiliation(s)
- S Ahmadi
- Kurdistan Centre for Cell and Molecular Research, Kurdistan University of Medical Sciences, Sanandaj, Kurdistan, Iran
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