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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, 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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Xia S, Bozóky Z, Di Paola M, Laselva O, Ahmadi S, Jiang JX, Pitstick AL, Jiang C, Rotin D, Mayhew CN, Jones NL, Bear CE. High-Throughput Functional Analysis of CFTR and Other Apically Localized Proteins in iPSC-Derived Human Intestinal Organoids. Cells 2021; 10:cells10123419. [PMID: 34943927 PMCID: PMC8699884 DOI: 10.3390/cells10123419] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/26/2021] [Accepted: 11/30/2021] [Indexed: 01/15/2023] Open
Abstract
Induced Pluripotent Stem Cells (iPSCs) can be differentiated into epithelial organoids that recapitulate the relevant context for CFTR and enable testing of therapies targeting Cystic Fibrosis (CF)-causing mutant proteins. However, to date, CF-iPSC-derived organoids have only been used to study pharmacological modulation of mutant CFTR channel activity and not the activity of other disease-relevant membrane protein constituents. In the current work, we describe a high-throughput, fluorescence-based assay of CFTR channel activity in iPSC-derived intestinal organoids and describe how this method can be adapted to study other apical membrane proteins. Specifically, we show how this assay can be employed to study CFTR and ENaC channels and an electrogenic acid transporter in the same iPSC-derived intestinal tissue. This phenotypic platform promises to expand CF therapy discovery to include strategies that target multiple determinants of epithelial fluid transport.
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Affiliation(s)
- Sunny Xia
- Molecular Medicine, Hospital for Sick Children, 686 Bay St, Toronto, ON M5G 0A4, Canada; (S.X.); (Z.B.); (O.L.); (J.X.J.)
- Cell Biology, Hospital for Sick Children, Toronto, ON M5G 0A4, Canada; (C.J.); (D.R.); (N.L.J.)
- Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada;
| | - Zoltán Bozóky
- Molecular Medicine, Hospital for Sick Children, 686 Bay St, Toronto, ON M5G 0A4, Canada; (S.X.); (Z.B.); (O.L.); (J.X.J.)
| | - Michelle Di Paola
- Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada;
| | - Onofrio Laselva
- Molecular Medicine, Hospital for Sick Children, 686 Bay St, Toronto, ON M5G 0A4, Canada; (S.X.); (Z.B.); (O.L.); (J.X.J.)
- Department of Medical and Surgical Sciences, University of Foggia, 71122 Foggia, Italy
| | - Saumel Ahmadi
- Department of Neurology, Washington University in St. Louis, St. Louis, MO 63110, USA;
| | - Jia Xin Jiang
- Molecular Medicine, Hospital for Sick Children, 686 Bay St, Toronto, ON M5G 0A4, Canada; (S.X.); (Z.B.); (O.L.); (J.X.J.)
| | - Amy L. Pitstick
- Division of Developmental Biology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH 45229, USA; (A.L.P.); (C.N.M.)
| | - Chong Jiang
- Cell Biology, Hospital for Sick Children, Toronto, ON M5G 0A4, Canada; (C.J.); (D.R.); (N.L.J.)
| | - Daniela Rotin
- Cell Biology, Hospital for Sick Children, Toronto, ON M5G 0A4, Canada; (C.J.); (D.R.); (N.L.J.)
- Department of Biochemistry, University of Toronto, Toronto, ON M5G 0A4, Canada
| | - Christopher N. Mayhew
- Division of Developmental Biology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH 45229, USA; (A.L.P.); (C.N.M.)
| | - Nicola L. Jones
- Cell Biology, Hospital for Sick Children, Toronto, ON M5G 0A4, Canada; (C.J.); (D.R.); (N.L.J.)
- Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada;
- Department of Paediatrics, University of Toronto, Toronto, ON M5G 0A4, Canada
| | - Christine E. Bear
- Molecular Medicine, Hospital for Sick Children, 686 Bay St, Toronto, ON M5G 0A4, Canada; (S.X.); (Z.B.); (O.L.); (J.X.J.)
- Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada;
- Department of Biochemistry, University of Toronto, Toronto, ON M5G 0A4, Canada
- Correspondence:
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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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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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7
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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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8
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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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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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Ahmadi S, Wu YS, Li M, Ip W, Lloyd-Kuzik A, Di Paola M, Du K, Xia S, Lew A, Bozoky Z, Forman-Kay J, Bear CE, Gonska T. Augmentation of Cystic Fibrosis Transmembrane Conductance Regulator Function in Human Bronchial Epithelial Cells via SLC6A14-Dependent Amino Acid Uptake. Implications for Treatment of Cystic Fibrosis. Am J Respir Cell Mol Biol 2020; 61:755-764. [PMID: 31189070 DOI: 10.1165/rcmb.2019-0094oc] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
SLC6A14-mediated l-arginine transport has been shown to augment the residual anion channel activity of the major mutant, F508del-CFTR, in the murine gastrointestinal tract. It is not yet known if this transporter augments residual and pharmacological corrected F508del-CFTR in primary airway epithelia. We sought to determine the role of l-arginine uptake via SLC6A14 in modifying F508del-CFTR channel activity in airway cells from patients with cystic fibrosis (CF). Human bronchial epithelial (HBE) cells from lung explants of patients without CF (HBE) and those with CF (CF-HBE) were used for H3-flux, airway surface liquid, and Ussing chamber studies. We used α-methyltryptophan as a specific inhibitor for SLC6A14. CFBE41o-, a commonly used CF airway cell line, was employed for studying the mechanism of the functional interaction between SLC6A14 and F508del-CFTR. SLC6A14 is functionally expressed in CF-HBE cells. l-arginine uptake via SLC6A14 augmented F508del-CFTR function at baseline and after treatment with lumacaftor. SLC6A14-mediated l-arginine uptake also increased the airway surface liquid in CF-HBE cells. Using CFBE41o cells, we showed that the positive SLC6A14 effect was mainly dependent on the nitric oxide (NO) synthase activity, nitrogen oxides, including NO, and phosphorylation by protein kinase G. These finding were confirmed in CF-HBE, as inducible NO synthase inhibition abrogated the functional interaction between SLC6A14 and pharmacological corrected F508del-CFTR. In summary, SLC6A14-mediated l-arginine transport augments residual F508del-CFTR channel function via a noncanonical, NO pathway. This effect is enhanced with increasing pharmacological rescue of F508del-CFTR to the membrane. The current study demonstrates how endogenous pathways can be used for the development of companion therapy in CF.
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Affiliation(s)
- Saumel Ahmadi
- Department of Physiology.,Programme in Molecular Medicine.,Programme in Genetics and Genome Biology, and
| | - Yu-Sheng Wu
- Department of Physiology.,Programme in Molecular Medicine
| | - Mingyuan Li
- Programme in Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Wan Ip
- Programme in Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Andrew Lloyd-Kuzik
- Department of Physiology.,Programme in Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada
| | | | - Kai Du
- Department of Biochemistry, and
| | - Sunny Xia
- Department of Physiology.,Programme in Molecular Medicine
| | | | | | - Julie Forman-Kay
- Department of Biochemistry, and.,Programme in Molecular Medicine
| | - Christine E Bear
- Department of Physiology.,Department of Biochemistry, and.,Programme in Molecular Medicine
| | - Tanja Gonska
- Department of Paediatrics, University of Toronto, Toronto, Ontario, Canada; and.,Programme in Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada
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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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15
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Wu YS, Jiang J, Ahmadi S, Lew A, Laselva O, Xia S, Bartlett C, Ip W, Wellhauser L, Ouyang H, Gonska T, Moraes TJ, Bear CE. ORKAMBI-Mediated Rescue of Mucociliary Clearance in Cystic Fibrosis Primary Respiratory Cultures Is Enhanced by Arginine Uptake, Arginase Inhibition, and Promotion of Nitric Oxide Signaling to the Cystic Fibrosis Transmembrane Conductance Regulator Channel. Mol Pharmacol 2019; 96:515-525. [PMID: 31427400 DOI: 10.1124/mol.119.117143] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 08/01/2019] [Indexed: 12/11/2022] Open
Abstract
ORKAMBI, a combination of the corrector, lumacaftor, and the potentiator, ivacaftor, partially rescues the defective processing and anion channel activity conferred by the major cystic fibrosis-causing mutation, F508del, in in vitro studies. Clinically, the improvement in lung function after ORKAMBI treatment is modest and variable, prompting the search for complementary interventions. As our previous work identified a positive effect of arginine-dependent nitric oxide signaling on residual F508del-Cftr function in murine intestinal epithelium, we were prompted to determine whether strategies aimed at increasing arginine would enhance F508del-cystic fibrosis transmembrane conductance regulator (CFTR) channel activity in patient-derived airway epithelia. Now, we show that the addition of arginine together with inhibition of intracellular arginase activity increased cytosolic nitric oxide and enhanced the rescue effect of ORKAMBI on F508del-CFTR-mediated chloride conductance at the cell surface of patient-derived bronchial and nasal epithelial cultures. Interestingly, arginine addition plus arginase inhibition also enhanced ORKAMBI-mediated increases in ciliary beat frequency and mucociliary movement, two in vitro CF phenotypes that are downstream of the channel defect. This work suggests that strategies to manipulate the arginine-nitric oxide pathway in combination with CFTR modulators may lead to improved clinical outcomes. SIGNIFICANCE STATEMENT: These proof-of-concept studies highlight the potential to boost the response to cystic fibrosis (CF) transmembrane conductance regulator (CFTR) modulators, lumacaftor and ivacaftor, in patient-derived airway tissues expressing the major CF-causing mutant, F508del-CFTR, by enhancing other regulatory pathways. In this case, we observed enhancement of pharmacologically rescued F508del-CFTR by arginine-dependent, nitric oxide signaling through inhibition of endogenous arginase activity.
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Affiliation(s)
- Yu-Sheng Wu
- Programmes in Translational Medicine (Y.-S.W., C.B., W.I., H.O., T.G., T.J.M.) and Molecular Medicine (Y.-S.W., J.J., S.A., A.L., O.L., S.X., L.W., C.E.B.), Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; and Departments of Laboratory Medicine and Pathobiology (T.J.M.), Biochemistry (C.E.B.), Physiology (Y.-S.W., S.A., O.L., S.X., C.E.B.), and Paediatrics (T.G., T.J.M.), University of Toronto, Toronto, Ontario, Canada
| | - Janet Jiang
- Programmes in Translational Medicine (Y.-S.W., C.B., W.I., H.O., T.G., T.J.M.) and Molecular Medicine (Y.-S.W., J.J., S.A., A.L., O.L., S.X., L.W., C.E.B.), Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; and Departments of Laboratory Medicine and Pathobiology (T.J.M.), Biochemistry (C.E.B.), Physiology (Y.-S.W., S.A., O.L., S.X., C.E.B.), and Paediatrics (T.G., T.J.M.), University of Toronto, Toronto, Ontario, Canada
| | - Saumel Ahmadi
- Programmes in Translational Medicine (Y.-S.W., C.B., W.I., H.O., T.G., T.J.M.) and Molecular Medicine (Y.-S.W., J.J., S.A., A.L., O.L., S.X., L.W., C.E.B.), Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; and Departments of Laboratory Medicine and Pathobiology (T.J.M.), Biochemistry (C.E.B.), Physiology (Y.-S.W., S.A., O.L., S.X., C.E.B.), and Paediatrics (T.G., T.J.M.), University of Toronto, Toronto, Ontario, Canada
| | - Alexandria Lew
- Programmes in Translational Medicine (Y.-S.W., C.B., W.I., H.O., T.G., T.J.M.) and Molecular Medicine (Y.-S.W., J.J., S.A., A.L., O.L., S.X., L.W., C.E.B.), Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; and Departments of Laboratory Medicine and Pathobiology (T.J.M.), Biochemistry (C.E.B.), Physiology (Y.-S.W., S.A., O.L., S.X., C.E.B.), and Paediatrics (T.G., T.J.M.), University of Toronto, Toronto, Ontario, Canada
| | - Onofrio Laselva
- Programmes in Translational Medicine (Y.-S.W., C.B., W.I., H.O., T.G., T.J.M.) and Molecular Medicine (Y.-S.W., J.J., S.A., A.L., O.L., S.X., L.W., C.E.B.), Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; and Departments of Laboratory Medicine and Pathobiology (T.J.M.), Biochemistry (C.E.B.), Physiology (Y.-S.W., S.A., O.L., S.X., C.E.B.), and Paediatrics (T.G., T.J.M.), University of Toronto, Toronto, Ontario, Canada
| | - Sunny Xia
- Programmes in Translational Medicine (Y.-S.W., C.B., W.I., H.O., T.G., T.J.M.) and Molecular Medicine (Y.-S.W., J.J., S.A., A.L., O.L., S.X., L.W., C.E.B.), Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; and Departments of Laboratory Medicine and Pathobiology (T.J.M.), Biochemistry (C.E.B.), Physiology (Y.-S.W., S.A., O.L., S.X., C.E.B.), and Paediatrics (T.G., T.J.M.), University of Toronto, Toronto, Ontario, Canada
| | - Claire Bartlett
- Programmes in Translational Medicine (Y.-S.W., C.B., W.I., H.O., T.G., T.J.M.) and Molecular Medicine (Y.-S.W., J.J., S.A., A.L., O.L., S.X., L.W., C.E.B.), Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; and Departments of Laboratory Medicine and Pathobiology (T.J.M.), Biochemistry (C.E.B.), Physiology (Y.-S.W., S.A., O.L., S.X., C.E.B.), and Paediatrics (T.G., T.J.M.), University of Toronto, Toronto, Ontario, Canada
| | - Wan Ip
- Programmes in Translational Medicine (Y.-S.W., C.B., W.I., H.O., T.G., T.J.M.) and Molecular Medicine (Y.-S.W., J.J., S.A., A.L., O.L., S.X., L.W., C.E.B.), Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; and Departments of Laboratory Medicine and Pathobiology (T.J.M.), Biochemistry (C.E.B.), Physiology (Y.-S.W., S.A., O.L., S.X., C.E.B.), and Paediatrics (T.G., T.J.M.), University of Toronto, Toronto, Ontario, Canada
| | - Leigh Wellhauser
- Programmes in Translational Medicine (Y.-S.W., C.B., W.I., H.O., T.G., T.J.M.) and Molecular Medicine (Y.-S.W., J.J., S.A., A.L., O.L., S.X., L.W., C.E.B.), Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; and Departments of Laboratory Medicine and Pathobiology (T.J.M.), Biochemistry (C.E.B.), Physiology (Y.-S.W., S.A., O.L., S.X., C.E.B.), and Paediatrics (T.G., T.J.M.), University of Toronto, Toronto, Ontario, Canada
| | - Hong Ouyang
- Programmes in Translational Medicine (Y.-S.W., C.B., W.I., H.O., T.G., T.J.M.) and Molecular Medicine (Y.-S.W., J.J., S.A., A.L., O.L., S.X., L.W., C.E.B.), Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; and Departments of Laboratory Medicine and Pathobiology (T.J.M.), Biochemistry (C.E.B.), Physiology (Y.-S.W., S.A., O.L., S.X., C.E.B.), and Paediatrics (T.G., T.J.M.), University of Toronto, Toronto, Ontario, Canada
| | - Tanja Gonska
- Programmes in Translational Medicine (Y.-S.W., C.B., W.I., H.O., T.G., T.J.M.) and Molecular Medicine (Y.-S.W., J.J., S.A., A.L., O.L., S.X., L.W., C.E.B.), Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; and Departments of Laboratory Medicine and Pathobiology (T.J.M.), Biochemistry (C.E.B.), Physiology (Y.-S.W., S.A., O.L., S.X., C.E.B.), and Paediatrics (T.G., T.J.M.), University of Toronto, Toronto, Ontario, Canada
| | - Theo J Moraes
- Programmes in Translational Medicine (Y.-S.W., C.B., W.I., H.O., T.G., T.J.M.) and Molecular Medicine (Y.-S.W., J.J., S.A., A.L., O.L., S.X., L.W., C.E.B.), Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; and Departments of Laboratory Medicine and Pathobiology (T.J.M.), Biochemistry (C.E.B.), Physiology (Y.-S.W., S.A., O.L., S.X., C.E.B.), and Paediatrics (T.G., T.J.M.), University of Toronto, Toronto, Ontario, Canada
| | - Christine E Bear
- Programmes in Translational Medicine (Y.-S.W., C.B., W.I., H.O., T.G., T.J.M.) and Molecular Medicine (Y.-S.W., J.J., S.A., A.L., O.L., S.X., L.W., C.E.B.), Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada; and Departments of Laboratory Medicine and Pathobiology (T.J.M.), Biochemistry (C.E.B.), Physiology (Y.-S.W., S.A., O.L., S.X., C.E.B.), and Paediatrics (T.G., T.J.M.), University of Toronto, Toronto, Ontario, Canada
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16
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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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17
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Wong AP, Shojaie S, Liang Q, Xia S, Di Paola M, Ahmadi S, Bilodeau C, Garner J, Post M, Duchesneau P, Waddell TK, Bear CE, Nagy A, Rossant J. Conversion of human and mouse fibroblasts into lung-like epithelial cells. Sci Rep 2019; 9:9027. [PMID: 31227724 PMCID: PMC6588580 DOI: 10.1038/s41598-019-45195-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 05/31/2019] [Indexed: 01/08/2023] Open
Abstract
Cell lineage conversion of fibroblasts to specialized cell types through transdifferentiation may provide a fast and alternative cell source for regenerative medicine. Here we show that transient transduction of fibroblasts with the four reprogramming factors (Oct4, Sox2, Klf4, and c-Myc) in addition to the early lung transcription factor Nkx2-1 (also known as Ttf1), followed by directed differentiation of the cells, can convert mouse embryonic and human adult dermal fibroblasts into induced lung-like epithelial cells (iLEC). These iLEC differentiate into multiple lung cell types in air liquid interface cultures, repopulate decellularized rat lung scaffolds, and form lung epithelia composed of Ciliated, Goblet, Basal, and Club cells after transplantation into immune-compromised mice. As proof-of-concept, differentiated human iLEC harboring the Cystic Fibrosis mutation dF508 demonstrated pharmacological rescue of CFTR function using the combination of lumacaftor and ivacaftor. Overall, this is a promising alternative approach for generation of patient-specific lung-like progenitors to study lung function, disease and future regeneration strategies.
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Affiliation(s)
- Amy P Wong
- Program in Developmental & Stem Cell Biology, SickKids Research Institute, Hospital for Sick Children, Toronto, ON, Canada.
| | - Sharareh Shojaie
- Program in Translational Medicine, SickKids Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Qin Liang
- Lunenfeld-Tanenbaum Research Institute, Sinai Health System, Toronto, ON, Canada
| | - Sunny Xia
- Program in Molecular Medicine, SickKids Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Michelle Di Paola
- Program in Molecular Medicine, SickKids Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Saumel Ahmadi
- Program in Molecular Medicine, SickKids Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Claudia Bilodeau
- Program in Translational Medicine, SickKids Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Jodi Garner
- Program in Developmental & Stem Cell Biology, SickKids Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Martin Post
- Program in Translational Medicine, SickKids Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Pascal Duchesneau
- Latner Thoracic Surgery Research Laboratories, Toronto General Research Institute, and the McEwen Centre for Regenerative Medicine, Toronto, Canada
| | - Thomas K Waddell
- Latner Thoracic Surgery Research Laboratories, Toronto General Research Institute, and the McEwen Centre for Regenerative Medicine, Toronto, Canada
| | - Christine E Bear
- Program in Molecular Medicine, SickKids Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Andras Nagy
- Lunenfeld-Tanenbaum Research Institute, Sinai Health System, Toronto, ON, Canada
| | - Janet Rossant
- Program in Developmental & Stem Cell Biology, SickKids Research Institute, Hospital for Sick Children, Toronto, ON, Canada. .,Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada. .,Department of Obstetrics and Gynaecology, University of Toronto, Toronto, Canada.
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18
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Galardi MM, Gaudioso C, Ahmadi S, Evans E, Gilbert L, Mar S. Differential Diagnosis of Pediatric Multiple Sclerosis. Children (Basel) 2019; 6:children6060075. [PMID: 31163654 PMCID: PMC6617098 DOI: 10.3390/children6060075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 04/19/2019] [Revised: 05/16/2019] [Accepted: 05/20/2019] [Indexed: 01/28/2023]
Abstract
The differential diagnosis of pediatric multiple sclerosis (MS) can be broad and pose diagnostic challenges, particularly at initial presentation. Among demyelinating entities, neuromyelitis optica spectrum disorders (NMOSD), myelin oligodendrocyte glycoprotein antibodies (MOG-ab) associated disorders, and acute disseminated encephalomyelitis (ADEM) are now well-known as unique disease processes and yet continue to overlap with MS in regards to clinical presentation and imaging. In non-inflammatory entities, such as metabolic disorders and leukodystrophies, an erroneous diagnosis of MS can be made even while applying appropriate diagnostic criteria. Knowing the epidemiology, typical clinical presentation, diagnostic criteria, and ancillary test results in each disease, can aid in making the correct diagnosis by contrasting these features with those of pediatric MS. Determining the correct diagnosis early, allows for efficient and effective treatment as well as appropriate prognostication.
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Affiliation(s)
| | - Cristina Gaudioso
- Department of Neurology, Washington University in St. Louis, St. Louis, MO 63110, USA.
| | - Saumel Ahmadi
- Department of Neurology, Washington University in St. Louis, St. Louis, MO 63110, USA.
| | - Emily Evans
- Department of Neurology, Washington University in St. Louis, St. Louis, MO 63110, USA.
| | - Laura Gilbert
- Department of Neurology, Washington University in St. Louis, St. Louis, MO 63110, USA.
| | - Soe Mar
- Department of Neurology, Washington University in St. Louis, St. Louis, MO 63110, USA.
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19
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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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20
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Beaudoin T, Stone TA, Glibowicka M, Adams C, Yau Y, Ahmadi S, Bear CE, Grasemann H, Waters V, Deber CM. Activity of a novel antimicrobial peptide against Pseudomonas aeruginosa biofilms. Sci Rep 2018; 8:14728. [PMID: 30283025 PMCID: PMC6170476 DOI: 10.1038/s41598-018-33016-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 09/17/2018] [Indexed: 11/09/2022] Open
Abstract
With the increasing recognition of biofilms in human disease, the development of novel antimicrobial therapies is of critical importance. For example, in patients with cystic fibrosis (CF), the acquisition of host-adapted, chronic Pseudomonas aeruginosa infection is associated with a decline in lung function and increased mortality. Our objective was to test the in vitro efficacy of a membrane-active antimicrobial peptide we designed, termed 6K-F17 (sequence: KKKKKK-AAFAAWAAFAA-NH2), against multidrug resistant P. aeruginosa biofilms. This peptide displays high antimicrobial activity against a range of pathogenic bacteria, yet is non-hemolytic to human erythrocytes and non-toxic to human bronchial epithelial cells. In the present work, P. aeruginosa strain PAO1, and four multidrug resistant (MDR) isolates from chronically infected CF individuals, were grown as 48-hour biofilms in a static biofilm slide chamber model. These biofilms were then exposed to varying concentrations of 6K-F17 alone, or in the presence of tobramycin, prior to confocal imaging. Biofilm biovolume and viability were assessed. 6K-F17 was able to kill biofilms - even in the presence of sputum - and greatly reduce biofilm biovolume in PAO1 and MDR isolates. Strikingly, when used in conjunction with tobramycin, low doses of 6K-F17 significantly potentiated tobramycin killing, leading to biofilm destruction.
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Affiliation(s)
- Trevor Beaudoin
- Division of Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Tracy A Stone
- Division of Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada.,Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada
| | - Miroslawa Glibowicka
- Division of Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Christina Adams
- Division of Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Yvonne Yau
- Division of Microbiology, Department of Pediatric Laboratory Medicine, Hospital for Sick Children, Toronto, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Saumel Ahmadi
- Division of Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Christine E Bear
- Division of Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada.,Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Hartmut Grasemann
- Division of Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Division of Respiratory Medicine, Department of Pediatrics, Hospital for Sick Children, Toronto, Canada
| | - Valerie Waters
- Division of Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Division of Infectious Diseases, Department of Pediatrics, The Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, M5G 1X8, Canada
| | - Charles M Deber
- Division of Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada. .,Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada.
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Ahmadi S, Xia S, Wu YS, Di Paola M, Kissoon R, Luk C, Lin F, Du K, Rommens J, Bear CE. SLC6A14, an amino acid transporter, modifies the primary CF defect in fluid secretion. eLife 2018; 7:37963. [PMID: 30004386 PMCID: PMC6054531 DOI: 10.7554/elife.37963] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 07/12/2018] [Indexed: 01/29/2023] Open
Abstract
The severity of intestinal disease associated with Cystic Fibrosis (CF) is variable in the patient population and this variability is partially conferred by the influence of modifier genes. Genome-wide association studies have identified SLC6A14, an electrogenic amino acid transporter, as a genetic modifier of CF-associated meconium ileus. The purpose of the current work was to determine the biological role of Slc6a14, by disrupting its expression in CF mice bearing the major mutation, F508del. We found that disruption of Slc6a14 worsened the intestinal fluid secretion defect, characteristic of these mice. In vitro studies of mouse intestinal organoids revealed that exacerbation of the primary defect was associated with reduced arginine uptake across the apical membrane, with aberrant nitric oxide and cyclic GMP-mediated regulation of the major CF-causing mutant protein. Together, these studies highlight the role of this apical transporter in modifying cellular nitric oxide levels, residual function of the major CF mutant and potentially, its promise as a therapeutic target.
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Affiliation(s)
- Saumel Ahmadi
- Department of Physiology, University of Toronto, Toronto, Canada.,Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Sunny Xia
- Department of Physiology, University of Toronto, Toronto, Canada.,Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Yu-Sheng Wu
- Department of Physiology, University of Toronto, Toronto, Canada.,Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Michelle Di Paola
- Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada.,Department of Biochemistry, University of Toronto, Toronto, Canada
| | - Randolph Kissoon
- Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Catherine Luk
- Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Fan Lin
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Kai Du
- Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Johanna Rommens
- Department of Molecular Genetics, University of Toronto, Toronto, Canada.,Programme in Genetics and Genome Biology, Research Institute, Hospital for Sick Children, Toronto, Canada
| | - Christine E Bear
- Department of Physiology, University of Toronto, Toronto, Canada.,Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, Canada.,Department of Biochemistry, University of Toronto, Toronto, Canada
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22
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Chin S, Hung M, Won A, Wu YS, Ahmadi S, Yang D, Elmallah S, Toutah K, Hamilton CM, Young RN, Viirre RD, Yip CM, Bear CE. Lipophilicity of the Cystic Fibrosis Drug, Ivacaftor (VX-770), and Its Destabilizing Effect on the Major CF-causing Mutation: F508del. Mol Pharmacol 2018; 94:917-925. [PMID: 29903751 DOI: 10.1124/mol.118.112177] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 06/13/2018] [Indexed: 12/18/2022] Open
Abstract
Deletion of phenylalanine at position 508 (F508del) in cystic fibrosis transmembrane conductance regulator (CFTR) is the most common cystic fibrosis (CF)-causing mutation. Recently, ORKAMBI, a combination therapy that includes a corrector of the processing defect of F508del-CFTR (lumacaftor or VX-809) and a potentiator of channel activity (ivacaftor or VX-770), was approved for CF patients homozygous for this mutation. However, clinical studies revealed that the effect of ORKAMBI on lung function is modest and it was proposed that this modest effect relates to a negative impact of VX-770 on the stability of F508del-CFTR. In the current studies, we showed that this negative effect of VX-770 at 10 μM correlated with its inhibitory effect on VX-809-mediated correction of the interface between the second membrane spanning domain and the first nucleotide binding domain bearing F508del. Interestingly, we found that VX-770 exerted a similar negative effect on the stability of other membrane localized solute carriers (SLC26A3, SLC26A9, and SLC6A14), suggesting that this negative effect is not specific for F508del-CFTR. We determined that the relative destabilizing effect of a panel of VX-770 derivatives on F508del-CFTR correlated with their predicted lipophilicity. Polarized total internal reflection fluorescence microscopy on a supported lipid bilayer model shows that VX-770, and not its less lipophilic derivative, increased the fluidity of and reorganized the membrane. In summary, our findings show that there is a potential for nonspecific effects of VX-770 on the lipid bilayer and suggest that this effect may account for its destabilizing effect on VX-809- rescued F508del-CFTR.
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Affiliation(s)
- Stephanie Chin
- Department of Molecular Medicine, Hospital for Sick Children, Toronto, Ontario, Canada (S.C., M.H., Y.-S.W., S.A., D.Y., C.E.B.); Departments of Biochemistry (S.C., C.E.B.) and Physiology (M.H., Y.-S.W., S.A., C.E.B.), and Institute of Biomaterials and Biomedical Engineering (A.W., C.M.Y.), University of Toronto, Toronto, Ontario, Canada; Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada (S.E., K.T., R.D.V.); and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada (C.M.H., R.N.Y.)
| | - Maurita Hung
- Department of Molecular Medicine, Hospital for Sick Children, Toronto, Ontario, Canada (S.C., M.H., Y.-S.W., S.A., D.Y., C.E.B.); Departments of Biochemistry (S.C., C.E.B.) and Physiology (M.H., Y.-S.W., S.A., C.E.B.), and Institute of Biomaterials and Biomedical Engineering (A.W., C.M.Y.), University of Toronto, Toronto, Ontario, Canada; Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada (S.E., K.T., R.D.V.); and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada (C.M.H., R.N.Y.)
| | - Amy Won
- Department of Molecular Medicine, Hospital for Sick Children, Toronto, Ontario, Canada (S.C., M.H., Y.-S.W., S.A., D.Y., C.E.B.); Departments of Biochemistry (S.C., C.E.B.) and Physiology (M.H., Y.-S.W., S.A., C.E.B.), and Institute of Biomaterials and Biomedical Engineering (A.W., C.M.Y.), University of Toronto, Toronto, Ontario, Canada; Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada (S.E., K.T., R.D.V.); and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada (C.M.H., R.N.Y.)
| | - Yu-Sheng Wu
- Department of Molecular Medicine, Hospital for Sick Children, Toronto, Ontario, Canada (S.C., M.H., Y.-S.W., S.A., D.Y., C.E.B.); Departments of Biochemistry (S.C., C.E.B.) and Physiology (M.H., Y.-S.W., S.A., C.E.B.), and Institute of Biomaterials and Biomedical Engineering (A.W., C.M.Y.), University of Toronto, Toronto, Ontario, Canada; Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada (S.E., K.T., R.D.V.); and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada (C.M.H., R.N.Y.)
| | - Saumel Ahmadi
- Department of Molecular Medicine, Hospital for Sick Children, Toronto, Ontario, Canada (S.C., M.H., Y.-S.W., S.A., D.Y., C.E.B.); Departments of Biochemistry (S.C., C.E.B.) and Physiology (M.H., Y.-S.W., S.A., C.E.B.), and Institute of Biomaterials and Biomedical Engineering (A.W., C.M.Y.), University of Toronto, Toronto, Ontario, Canada; Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada (S.E., K.T., R.D.V.); and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada (C.M.H., R.N.Y.)
| | - Donghe Yang
- Department of Molecular Medicine, Hospital for Sick Children, Toronto, Ontario, Canada (S.C., M.H., Y.-S.W., S.A., D.Y., C.E.B.); Departments of Biochemistry (S.C., C.E.B.) and Physiology (M.H., Y.-S.W., S.A., C.E.B.), and Institute of Biomaterials and Biomedical Engineering (A.W., C.M.Y.), University of Toronto, Toronto, Ontario, Canada; Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada (S.E., K.T., R.D.V.); and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada (C.M.H., R.N.Y.)
| | - Salma Elmallah
- Department of Molecular Medicine, Hospital for Sick Children, Toronto, Ontario, Canada (S.C., M.H., Y.-S.W., S.A., D.Y., C.E.B.); Departments of Biochemistry (S.C., C.E.B.) and Physiology (M.H., Y.-S.W., S.A., C.E.B.), and Institute of Biomaterials and Biomedical Engineering (A.W., C.M.Y.), University of Toronto, Toronto, Ontario, Canada; Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada (S.E., K.T., R.D.V.); and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada (C.M.H., R.N.Y.)
| | - Krimo Toutah
- Department of Molecular Medicine, Hospital for Sick Children, Toronto, Ontario, Canada (S.C., M.H., Y.-S.W., S.A., D.Y., C.E.B.); Departments of Biochemistry (S.C., C.E.B.) and Physiology (M.H., Y.-S.W., S.A., C.E.B.), and Institute of Biomaterials and Biomedical Engineering (A.W., C.M.Y.), University of Toronto, Toronto, Ontario, Canada; Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada (S.E., K.T., R.D.V.); and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada (C.M.H., R.N.Y.)
| | - C Michael Hamilton
- Department of Molecular Medicine, Hospital for Sick Children, Toronto, Ontario, Canada (S.C., M.H., Y.-S.W., S.A., D.Y., C.E.B.); Departments of Biochemistry (S.C., C.E.B.) and Physiology (M.H., Y.-S.W., S.A., C.E.B.), and Institute of Biomaterials and Biomedical Engineering (A.W., C.M.Y.), University of Toronto, Toronto, Ontario, Canada; Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada (S.E., K.T., R.D.V.); and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada (C.M.H., R.N.Y.)
| | - Robert N Young
- Department of Molecular Medicine, Hospital for Sick Children, Toronto, Ontario, Canada (S.C., M.H., Y.-S.W., S.A., D.Y., C.E.B.); Departments of Biochemistry (S.C., C.E.B.) and Physiology (M.H., Y.-S.W., S.A., C.E.B.), and Institute of Biomaterials and Biomedical Engineering (A.W., C.M.Y.), University of Toronto, Toronto, Ontario, Canada; Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada (S.E., K.T., R.D.V.); and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada (C.M.H., R.N.Y.)
| | - Russell D Viirre
- Department of Molecular Medicine, Hospital for Sick Children, Toronto, Ontario, Canada (S.C., M.H., Y.-S.W., S.A., D.Y., C.E.B.); Departments of Biochemistry (S.C., C.E.B.) and Physiology (M.H., Y.-S.W., S.A., C.E.B.), and Institute of Biomaterials and Biomedical Engineering (A.W., C.M.Y.), University of Toronto, Toronto, Ontario, Canada; Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada (S.E., K.T., R.D.V.); and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada (C.M.H., R.N.Y.)
| | - Christopher M Yip
- Department of Molecular Medicine, Hospital for Sick Children, Toronto, Ontario, Canada (S.C., M.H., Y.-S.W., S.A., D.Y., C.E.B.); Departments of Biochemistry (S.C., C.E.B.) and Physiology (M.H., Y.-S.W., S.A., C.E.B.), and Institute of Biomaterials and Biomedical Engineering (A.W., C.M.Y.), University of Toronto, Toronto, Ontario, Canada; Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada (S.E., K.T., R.D.V.); and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada (C.M.H., R.N.Y.)
| | - Christine E Bear
- Department of Molecular Medicine, Hospital for Sick Children, Toronto, Ontario, Canada (S.C., M.H., Y.-S.W., S.A., D.Y., C.E.B.); Departments of Biochemistry (S.C., C.E.B.) and Physiology (M.H., Y.-S.W., S.A., C.E.B.), and Institute of Biomaterials and Biomedical Engineering (A.W., C.M.Y.), University of Toronto, Toronto, Ontario, Canada; Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada (S.E., K.T., R.D.V.); and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada (C.M.H., R.N.Y.)
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23
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Molinski SV, Ahmadi S, Ip W, Ouyang H, Villella A, Miller JP, Lee PS, Kulleperuma K, Du K, Di Paola M, Eckford PD, Laselva O, Huan LJ, Wellhauser L, Li E, Ray PN, Pomès R, Moraes TJ, Gonska T, Ratjen F, Bear CE. Orkambi® and amplifier co-therapy improves function from a rare CFTR mutation in gene-edited cells and patient tissue. EMBO Mol Med 2018; 9:1224-1243. [PMID: 28667089 PMCID: PMC5582412 DOI: 10.15252/emmm.201607137] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The combination therapy of lumacaftor and ivacaftor (Orkambi®) is approved for patients bearing the major cystic fibrosis (CF) mutation: ΔF508. It has been predicted that Orkambi® could treat patients with rarer mutations of similar “theratype”; however, a standardized approach confirming efficacy in these cohorts has not been reported. Here, we demonstrate that patients bearing the rare mutation: c.3700 A>G, causing protein misprocessing and altered channel function—similar to ΔF508‐CFTR, are unlikely to yield a robust Orkambi® response. While in silico and biochemical studies confirmed that this mutation could be corrected and potentiated by lumacaftor and ivacaftor, respectively, this combination led to a minor in vitro response in patient‐derived tissue. A CRISPR/Cas9‐edited bronchial epithelial cell line bearing this mutation enabled studies showing that an “amplifier” compound, effective in increasing the levels of immature CFTR protein, augmented the Orkambi® response. Importantly, this “amplifier” effect was recapitulated in patient‐derived nasal cultures—providing the first evidence for its efficacy in augmenting Orkambi® in tissues harboring a rare CF‐causing mutation. We propose that this multi‐disciplinary approach, including creation of CRISPR/Cas9‐edited cells to profile modulators together with validation using primary tissue, will facilitate therapy development for patients with rare CF mutations.
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Affiliation(s)
- Steven V Molinski
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada.,Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Saumel Ahmadi
- Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada.,Department of Physiology, University of Toronto, Toronto, ON, Canada
| | - Wan Ip
- Programme in Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Hong Ouyang
- Programme in Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | | | | | - Po-Shun Lee
- Proteostasis Therapeutics, Cambridge, MA, USA
| | - Kethika Kulleperuma
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada.,Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Kai Du
- Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Michelle Di Paola
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada.,Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Paul Dw Eckford
- Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Onofrio Laselva
- Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Ling Jun Huan
- Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Leigh Wellhauser
- Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Ellen Li
- Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Peter N Ray
- Division of Molecular Genetics, Hospital for Sick Children, Toronto, ON, Canada
| | - Régis Pomès
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada.,Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Theo J Moraes
- Programme in Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada.,Department of Paediatrics, University of Toronto, Toronto, ON, Canada
| | - Tanja Gonska
- Programme in Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada.,Department of Paediatrics, University of Toronto, Toronto, ON, Canada
| | - Felix Ratjen
- Division of Respiratory Medicine, Hospital for Sick Children, Toronto, ON, Canada
| | - Christine E Bear
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada .,Programme in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada.,Department of Physiology, University of Toronto, Toronto, ON, Canada
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24
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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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25
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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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26
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Coghlan M, Richards E, Shaik S, Rossi P, Vanama RB, Ahmadi S, Petroz C, Crawford M, Maynes JT. Inhalational Anesthetics Induce Neuronal Protein Aggregation and Affect ER Trafficking. Sci Rep 2018; 8:5275. [PMID: 29588456 PMCID: PMC5869676 DOI: 10.1038/s41598-018-23335-0] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 03/07/2018] [Indexed: 12/27/2022] Open
Abstract
Anesthetic agents have been implicated in the causation of neurological and cognitive deficits after surgery, the exacerbation of chronic neurodegenerative disease, and were recently reported to promote the onset of the neurologic respiratory disease Congenital Central Hypoventilation Syndrome (CCHS), related to misfolding of the transcription factor Phox2B. To study how anesthetic agents could affect neuronal function through alterations to protein folding, we created neuronal cell models emulating the graded disease severity of CCHS. We found that the gas anesthetic isoflurane and the opiate morphine potentiated aggregation and mislocalization of Phox2B variants, similar to that seen in CCHS, and observed transcript and protein level changes consistent with activation of the endoplasmic reticulum (ER) unfolded protein response. Attenuation of ER stress pathways did not result in a correction of Phox2B misfolding, indicating a primary effect of isoflurane on protein structure. We also observed that isoflurane hindered the folding and activity of proteins that rely heavily on ER function, like the CFTR channel. Our results show how anesthetic drugs can alter protein folding and induce ER stress, indicating a mechanism by which these agents may affect neuronal function after surgery.
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Affiliation(s)
- Matthew Coghlan
- Department of Anesthesia and Pain Medicine, Hospital for Sick Children, Toronto, Canada
| | - Elizabeth Richards
- Department of Anesthesia and Pain Medicine, Hospital for Sick Children, Toronto, Canada
| | - Sadiq Shaik
- Department of Anesthesia and Pain Medicine, Hospital for Sick Children, Toronto, Canada
| | - Pablo Rossi
- Department of Anesthesia and Pain Medicine, Hospital for Sick Children, Toronto, Canada
| | - Ramesh Babu Vanama
- Department of Anesthesia and Pain Medicine, Hospital for Sick Children, Toronto, Canada
| | - Saumel Ahmadi
- Program in Molecular Medicine, SickKids Research Institute, Toronto, Canada.,Department of Physiology, University of Toronto, Toronto, Canada
| | - Christelle Petroz
- Department of Anesthesia and Pain Medicine, Hospital for Sick Children, Toronto, Canada
| | - Mark Crawford
- Department of Anesthesia and Pain Medicine, Hospital for Sick Children, Toronto, Canada.,Department of Anesthesia, University of Toronto, Toronto, Canada
| | - Jason T Maynes
- Department of Anesthesia and Pain Medicine, Hospital for Sick Children, Toronto, Canada. .,Department of Anesthesia, University of Toronto, Toronto, Canada. .,Program in Molecular Medicine, SickKids Research Institute, Toronto, Canada.
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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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28
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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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30
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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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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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Molinski SV, Ahmadi S, Hung M, Bear CE. Facilitating Structure-Function Studies of CFTR Modulator Sites with Efficiencies in Mutagenesis and Functional Screening. ACTA ACUST UNITED AC 2015; 20:1204-17. [PMID: 26385858 DOI: 10.1177/1087057115605834] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 08/23/2015] [Indexed: 12/20/2022]
Abstract
There are nearly 2000 mutations in the CFTR gene associated with cystic fibrosis disease, and to date, the only approved drug, Kalydeco, has been effective in rescuing the functional expression of a small subset of these mutant proteins with defects in channel activation. However, there is currently an urgent need to assess other mutations for possible rescue by Kalydeco, and further, definition of the binding site of such modulators on CFTR would enhance our understanding of the mechanism of action of such therapeutics. Here, we describe a simple and rapid one-step PCR-based site-directed mutagenesis method to generate mutations in the CFTR gene. This method was used to generate CFTR mutants bearing deletions (p.Gln2_Trp846del, p.Ser700_Asp835del, p.Ile1234_Arg1239del) and truncation with polyhistidine tag insertion (p.Glu1172-3Gly-6-His*), which either recapitulate a disease phenotype or render tools for modulator binding site identification, with subsequent evaluation of drug responses using a high-throughput (384-well) membrane potential-sensitive fluorescence assay of CFTR channel activity within a 1 wk time frame. This proof-of-concept study shows that these methods enable rapid and quantitative comparison of multiple CFTR mutants to emerging drugs, facilitating future large-scale efforts to stratify mutants according to their "theratype" or most promising targeted therapy.
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Affiliation(s)
- Steven V Molinski
- Molecular Structure and Function, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada Department of Biochemistry, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Saumel Ahmadi
- Molecular Structure and Function, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Maurita Hung
- Molecular Structure and Function, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Christine E Bear
- Molecular Structure and Function, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada Department of Biochemistry, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
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Ogawa M, Ogawa S, Bear CE, Ahmadi S, Chin S, Li B, Grompe M, Keller G, Kamath BM, Ghanekar A. Directed differentiation of cholangiocytes from human pluripotent stem cells. Nat Biotechnol 2015; 33:853-61. [PMID: 26167630 DOI: 10.1038/nbt.3294] [Citation(s) in RCA: 192] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 06/19/2015] [Indexed: 12/28/2022]
Abstract
Although bile duct disorders are well-recognized causes of liver disease, the molecular and cellular events leading to biliary dysfunction are poorly understood. To enable modeling and drug discovery for biliary disease, we describe a protocol that achieves efficient differentiation of biliary epithelial cells (cholangiocytes) from human pluripotent stem cells (hPSCs) through delivery of developmentally relevant cues, including NOTCH signaling. Using three-dimensional culture, the protocol yields cystic and/or ductal structures that express mature biliary markers, including apical sodium-dependent bile acid transporter, secretin receptor, cilia and cystic fibrosis transmembrane conductance regulator (CFTR). We demonstrate that hPSC-derived cholangiocytes possess epithelial functions, including rhodamine efflux and CFTR-mediated fluid secretion. Furthermore, we show that functionally impaired hPSC-derived cholangiocytes from cystic fibrosis patients are rescued by CFTR correctors. These findings demonstrate that mature cholangiocytes can be differentiated from hPSCs and used for studies of biliary development and disease.
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Affiliation(s)
- Mina Ogawa
- 1] McEwen Centre for Regenerative Medicine, University Health Network, Toronto, Ontario, Canada. [2] Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Shinichiro Ogawa
- McEwen Centre for Regenerative Medicine, University Health Network, Toronto, Ontario, Canada
| | - Christine E Bear
- Program in Molecular Structure &Function, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
| | - Saumel Ahmadi
- Program in Molecular Structure &Function, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
| | - Stephanie Chin
- Program in Molecular Structure &Function, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
| | - Bin Li
- Department of Pediatrics, Oregon Health and Science University, Portland, Oregon, USA
| | - Markus Grompe
- Department of Pediatrics, Oregon Health and Science University, Portland, Oregon, USA
| | - Gordon Keller
- 1] McEwen Centre for Regenerative Medicine, University Health Network, Toronto, Ontario, Canada. [2] Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada. [3] Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Binita M Kamath
- 1] Division of Gastroenterology, Hepatology and Nutrition, The Hospital for Sick Children, Toronto, Ontario, Canada. [2] Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
| | - Anand Ghanekar
- 1] Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada. [2] Division of General Surgery, University Health Network, Toronto, Ontario, Canada. [3] Department of Surgery, University of Toronto, Toronto, Ontario, Canada
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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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Ahmadi S, Luk C, Xia S, Di Paola M, Chung T, Rommens J, Bear C. SLC6A14 Modifies Fluid Secretory Capacity of Cystic Fibrosis Affected Epithelium by Enhancing CFTR Channel Function. Biophys J 2015. [DOI: 10.1016/j.bpj.2014.11.132] [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: 11/16/2022] Open
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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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Pasyk S, Molinski S, Ahmadi S, Ramjeesingh M, Huan LJ, Chin S, Du K, Yeger H, Taylor P, Moran MF, Bear CE. The major cystic fibrosis causing mutation exhibits defective propensity for phosphorylation. Proteomics 2014; 15:447-61. [PMID: 25330774 DOI: 10.1002/pmic.201400218] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 09/24/2014] [Accepted: 10/16/2014] [Indexed: 11/11/2022]
Abstract
The major cystic fibrosis causing mutation, F508del-CFTR (where CFTR is cystic fibrosis transmembrane conductance regulator), impairs biosynthetic maturation of the CFTR protein, limiting its expression as a phosphorylation-dependent channel on the cell surface. The maturation defect can be partially rescued by low-temperature (27°C) cell culture conditions or small-molecule corrector compounds. Following its partial rescue, the open probability of F508del-CFTR is enhanced by the potentiator compound, VX-770. However, the channel activity of rescued F508del-CFTR remains less than that of the Wt-CFTR protein in the presence of VX-770. In this study, we asked if there are allosteric effects of F508del on the phosphorylation-regulated R domain. To identify defects in the R domain, we compared the phosphorylation status at protein kinase A sites in the R domain of Wt and F508del-CFTR. Here we show that phosphorylation of Ser-660, quantified by SRM-MS, is reduced in F508del-CFTR. Although the generation of a phosphomimic at this site (substituting aspartic acid for serine) did not modify the maturation defect, it did enhance F508del-CFTR channel function after pharmacological rescue with corrector VX-809, and treatment with the potentiator, VX-770. These findings support the concept that defective phosphorylation of F508del-CFTR partially accounts for its altered channel activity at the cell surface.
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Affiliation(s)
- Stan Pasyk
- Programme in Molecular Structure and Function, Research Institute, The Hospital for Sick Children, Toronto, ON, Canada; Department of Biochemistry, The University of Toronto, Toronto, ON, Canada
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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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Eckford P, Ramjeesingh M, Molinski S, Pasyk S, Dekkers JF, Li C, Ahmadi S, Ip W, Chung T, Du K, Yeger H, Beekman J, Gonska T, Bear C. VX-809 and Related Corrector Compounds Exhibit Secondary Activity Stabilizing Active F508del-CFTR after Its Partial Rescue to the Cell Surface. ACTA ACUST UNITED AC 2014; 21:666-78. [DOI: 10.1016/j.chembiol.2014.02.021] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Revised: 02/22/2014] [Accepted: 02/25/2014] [Indexed: 12/11/2022]
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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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47
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Ahmadi S, Luk C, Chung T, Mangat R, Rommens J, Bear C. Role of SLC6A14 as a Modifier of Cystic Fibrosis Phenotype. Biophys J 2013. [DOI: 10.1016/j.bpj.2012.11.160] [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: 10/27/2022] Open
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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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50
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Molinski S, Eckford PDW, Pasyk S, Ahmadi S, Chin S, Bear CE. Functional Rescue of F508del-CFTR Using Small Molecule Correctors. Front Pharmacol 2012; 3:160. [PMID: 23055971 PMCID: PMC3458236 DOI: 10.3389/fphar.2012.00160] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Accepted: 08/17/2012] [Indexed: 01/21/2023] Open
Abstract
High-throughput screens for small molecules that are effective in “correcting” the functional expression of F508del-CFTR have yielded several promising hits. Two such compounds are currently in clinical trial. Despite this success, it is clear that further advances will be required in order to restore 50% or greater of wild-type CFTR function to the airways of patients harboring the F508del-CFTR protein. Progress will be enhanced by our better understanding of the molecular and cellular defects caused by the F508del mutation, present in 90% of CF patients. The goal of this chapter is to review the current understanding of defects caused by F508del in the CFTR protein and in CFTR-mediated interactions important for its biosynthesis, trafficking, channel function, and stability at the cell surface. Finally, we will discuss the gaps in our knowledge regarding the mechanism of action of existing correctors, the unmet need to discover compounds which restore proper CFTR structure and function in CF affected tissues and new strategies for therapy development.
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Affiliation(s)
- Steven Molinski
- Programme in Molecular Structure and Function, Research Institute, Hospital for Sick Children Toronto, ON, Canada ; Department of Biochemistry, University of Toronto Toronto, ON, Canada
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