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Rasool S, Shomali T, Truong L, Croteau N, Veyron S, Bustillos BA, Springer W, Fiesel FC, Trempe JF. Identification and structural characterization of small molecule inhibitors of PINK1. Sci Rep 2024; 14:7739. [PMID: 38565869 PMCID: PMC10987619 DOI: 10.1038/s41598-024-58285-3] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 03/27/2024] [Indexed: 04/04/2024] Open
Abstract
Mutations in PINK1 and Parkin cause early-onset Parkinson's Disease (PD). PINK1 is a kinase which functions as a mitochondrial damage sensor and initiates mitochondrial quality control by accumulating on the damaged organelle. There, it phosphorylates ubiquitin, which in turn recruits and activates Parkin, an E3 ubiquitin ligase. Ubiquitylation of mitochondrial proteins leads to the autophagic degradation of the damaged organelle. Pharmacological modulation of PINK1 constitutes an appealing avenue to study its physiological function and develop therapeutics. In this study, we used a thermal shift assay with insect PINK1 to identify small molecules that inhibit ATP hydrolysis and ubiquitin phosphorylation. PRT062607, an SYK inhibitor, is the most potent inhibitor in our screen and inhibits both insect and human PINK1, with an IC50 in the 0.5-3 µM range in HeLa cells and dopaminergic neurons. The crystal structures of insect PINK1 bound to PRT062607 or CYC116 reveal how the compounds interact with the ATP-binding pocket. PRT062607 notably engages with the catalytic aspartate and causes a destabilization of insert-2 at the autophosphorylation dimer interface. While PRT062607 is not selective for PINK1, it provides a scaffold for the development of more selective and potent inhibitors of PINK1 that could be used as chemical probes.
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Affiliation(s)
- Shafqat Rasool
- Department of Pharmacology & Therapeutics, Centre de Recherche en Biologie Structurale, and Structural Genomics Consortium, McGill University, 3655 Prom Sir William Osler, Montréal, QC, H3G 1Y6, Canada
| | - Tara Shomali
- Department of Pharmacology & Therapeutics, Centre de Recherche en Biologie Structurale, and Structural Genomics Consortium, McGill University, 3655 Prom Sir William Osler, Montréal, QC, H3G 1Y6, Canada
| | - Luc Truong
- Department of Pharmacology & Therapeutics, Centre de Recherche en Biologie Structurale, and Structural Genomics Consortium, McGill University, 3655 Prom Sir William Osler, Montréal, QC, H3G 1Y6, Canada
| | - Nathalie Croteau
- Department of Pharmacology & Therapeutics, Centre de Recherche en Biologie Structurale, and Structural Genomics Consortium, McGill University, 3655 Prom Sir William Osler, Montréal, QC, H3G 1Y6, Canada
| | - Simon Veyron
- Department of Pharmacology & Therapeutics, Centre de Recherche en Biologie Structurale, and Structural Genomics Consortium, McGill University, 3655 Prom Sir William Osler, Montréal, QC, H3G 1Y6, Canada
| | | | - Wolfdieter Springer
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL, 32224, USA
- Neuroscience PhD Program, Mayo Clinic Graduate School of Biomedical Sciences, Jacksonville, FL, 32224, USA
| | - Fabienne C Fiesel
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL, 32224, USA
- Neuroscience PhD Program, Mayo Clinic Graduate School of Biomedical Sciences, Jacksonville, FL, 32224, USA
| | - Jean-François Trempe
- Department of Pharmacology & Therapeutics, Centre de Recherche en Biologie Structurale, and Structural Genomics Consortium, McGill University, 3655 Prom Sir William Osler, Montréal, QC, H3G 1Y6, Canada.
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Hafeez R, Kanwal Z, Raza MA, Rasool S, Riaz S, Naseem S, Rabani S, Haider I, Ahmad N, Alomar SY. Role of Citrullus colocynthis and Psidium guajava Mediated Green Synthesized Silver Nanoparticles in Disease Resistance against Aeromonas hydrophila Challenge in Labeo rohita. Biomedicines 2023; 11:2349. [PMID: 37760791 PMCID: PMC10525728 DOI: 10.3390/biomedicines11092349] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/13/2023] [Accepted: 08/16/2023] [Indexed: 09/29/2023] Open
Abstract
Green synthesis of metallic nanoparticles is an auspicious method of preparing nanoparticles using plant extracts that have lesser toxicity to animal cells and the host. In the present work, we analyzed the antibacterial activity of Citrullus colocynthis and Psidium guajava-mediated silver nanoparticles (Cc-AgNPs and Pg-AgNPs, respectively) against Aeromonas hydrophila (A. hydrophila) in an in vivo assay employing Labeo rohita (L. rohita). L. rohita were divided into six groups for both Cc-AgNPs and Pg-AgNPs treatments separately: Control, A. hydrophila infected, A. hydrophila + Ampicillin, A. hydrophila + Cc/Pg-AgNPs (25 µg/L), A. hydrophila + Cc/Pg-AgNPs (50 µg/L), and A. hydrophila + Cc/Pg-AgNPs (75 µg/L). Changes in different bio-indicators such as hematological, histological, oxidative stress, and cytokine analysis were observed. Interestingly, the infected fish treated with both types of AgNPs (Cc-AgNPs and Pg-AgNPs) exhibited a higher survival rate than the untreated infected fish and demonstrated signs of recovery from the infection, providing a compelling indication of the positive impact of phytosynthesized AgNPs. Disruptions in hematological and histological parameters were found in the infected fish. Both Cc-AgNPs and Pg-AgNPs showed recovery on the hematological and histological parameters. Analysis of oxidative stress and cytokine markers also revealed provoking evidence of the positive impact of Cc-AgNPs and Pg-AgNPs treatment against disease progression in the infected fish. The major finding of the study was that the higher concentrations of the nanoparticles (50 µg/L in the case of Cc-AgNPs and 75 µg/L in the case of Pg-AgNPs) were more effective in fighting against disease. In conclusion, our work presents novel insights for the use of green-synthesized AgNPs as economic and innocuous antibacterial candidates in aquaculture.
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Affiliation(s)
- Ramsha Hafeez
- Department of Zoology, Faculty of Natural Sciences, Lahore College for Women University, Jail Road, Lahore 54000, Pakistan; (R.H.); (S.R.)
| | - Zakia Kanwal
- Department of Zoology, Faculty of Natural Sciences, Lahore College for Women University, Jail Road, Lahore 54000, Pakistan; (R.H.); (S.R.)
| | - Muhammad Akram Raza
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan; (M.A.R.); (S.R.); (S.R.); (S.N.)
| | - Shafqat Rasool
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan; (M.A.R.); (S.R.); (S.R.); (S.N.)
| | - Saira Riaz
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan; (M.A.R.); (S.R.); (S.R.); (S.N.)
| | - Shahzad Naseem
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan; (M.A.R.); (S.R.); (S.R.); (S.N.)
| | - Shifa Rabani
- Department of Zoology, Faculty of Natural Sciences, Lahore College for Women University, Jail Road, Lahore 54000, Pakistan; (R.H.); (S.R.)
| | - Imran Haider
- Swammerdam Institute for Life Sciences, University of Amsterdam, 1012 Amsterdam, The Netherlands;
- Department of Soil, Plant and Food Sciences, Section of Plant Genetics and Breeding, University of Bari Aldo Moro, 70121 Bari, Italy
| | - Naushad Ahmad
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Suliman Yousef Alomar
- Zoology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
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Raza MA, Kanwal Z, Riaz S, Amjad M, Rasool S, Naseem S, Abbas N, Ahmad N, Alomar SY. In-Vivo Bactericidal Potential of Mangifera indica Mediated Silver Nanoparticles against Aeromonas hydrophila in Cirrhinus mrigala. Biomedicines 2023; 11:2272. [PMID: 37626768 PMCID: PMC10452189 DOI: 10.3390/biomedicines11082272] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/06/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
The present study reports the green synthesis of silver nanoparticles from leaves' extract of Mangifera indica (M. indica) and their antibacterial efficacy against Aeromonas hydrophila (A. hydrophila) in Cirrhinus mrigala (C. mrigala). The prepared M. indica mediated silver nanoparticles (Mi-AgNPs) were found to be polycrystalline in nature, spherical in shapes with average size of 62 ± 13 nm. C. mrigala (n = ±15/group) were divided into six groups i.e., G1: control, G2: A. hydrophila challenged, G3: A. hydrophila challenged + Mi-AgNPs (0.01 mg/L), G4: A. hydrophila challenged + Mi-AgNPs (0.05 mg/L), G5: A. hydrophila challenged + Mi-AgNPs (0.1 mg/L) and G6: A. hydrophila challenged + M. indica extract (0.1 mg/L). Serum biochemical, hematological, histological and oxidative biomarkers were evaluated after 15 days of treatment. The liver enzyme activities, serum proteins, hematological parameters and oxidative stress markers were found to be altered in the challenged fish but showed retrieval effects with Mi-AgNPs treatment. The histological analysis of liver, gills and kidney of the challenged fish also showed regaining effects following Mi-AgNPs treatment. A CFU assay from muscle tissue provided quantitative data that Mi-AgNPs can hinder the bacterial proliferation in challenged fish. The findings of this work suggest that M. indica based silver nanoparticles can be promising candidates for the control and treatment of microbial infections in aquaculture.
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Affiliation(s)
- Muhammad Akram Raza
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan; (S.R.); (S.R.); (S.N.)
| | - Zakia Kanwal
- Department of Zoology, Lahore College for Women University, Jail Road, Lahore 54000, Pakistan;
| | - Saira Riaz
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan; (S.R.); (S.R.); (S.N.)
| | - Maira Amjad
- Department of Physics, Clarkson University, Potsdam, NY 13699, USA;
| | - Shafqat Rasool
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan; (S.R.); (S.R.); (S.N.)
| | - Shahzad Naseem
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan; (S.R.); (S.R.); (S.N.)
| | - Nadeem Abbas
- Department of Chemistry, University of Leicester, Leicester LE1 7RH, UK;
| | - Naushad Ahmad
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Suliman Yousef Alomar
- Zoology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
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Dagher M, Ongo G, Robichaud N, Kong J, Rho W, Teahulos I, Tavakoli A, Bovaird S, Merjaneh S, Tan A, Edwardson K, Scheepers C, Ng A, Hajjar A, Sow B, Vrouvides M, Lee A, DeCorwin-Martin P, Rasool S, Huang J, Han Y, Erps T, Coffin S, Chandrasekaran SN, Miller L, Kost-Alimova M, Skepner A, Singh S, Carpenter AE, Munzar J, Juncker D. nELISA: A high-throughput, high-plex platform enables quantitative profiling of the secretome. bioRxiv 2023:2023.04.17.535914. [PMID: 37131604 PMCID: PMC10153206 DOI: 10.1101/2023.04.17.535914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We present the nELISA, a high-throughput, high-fidelity, and high-plex protein profiling platform. DNA oligonucleotides are used to pre-assemble antibody pairs on spectrally encoded microparticles and perform displacement-mediated detection. Spatial separation between non-cognate antibodies prevents the rise of reagent-driven cross-reactivity, while read-out is performed cost-efficiently and at high-throughput using flow cytometry. We assembled an inflammatory panel of 191 targets that were multiplexed without cross-reactivity or impact on performance vs 1-plex signals, with sensitivities as low as 0.1pg/mL and measurements spanning 7 orders of magnitude. We then performed a large-scale secretome perturbation screen of peripheral blood mononuclear cells (PBMCs), with cytokines as both perturbagens and read-outs, measuring 7,392 samples and generating ~1.5M protein datapoints in under a week, a significant advance in throughput compared to other highly multiplexed immunoassays. We uncovered 447 significant cytokine responses, including multiple putatively novel ones, that were conserved across donors and stimulation conditions. We also validated the nELISA's use in phenotypic screening, and propose its application to drug discovery.
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Shah D, Rasool S. Ethnicity in polycystic ovary syndrome. Climacteric 2023; 26:15-20. [PMID: 36459492 DOI: 10.1080/13697137.2022.2144211] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Polycystic ovary syndrome (PCOS) is the commonest gynecological endocrinopathy. Little is known about the exact etiopathogenesis and cardiometabolic mortality and morbidity in women with PCOS. PCOS is beyond the cosmetic concerns of an adolescent and fertility concerns of an adult and can cause serious unhealthy consequences in perimenopausal and postmenopausal age. This area needs to be assessed and addressed since the majority of these patients are lost to follow-up after completion of their families. Good evidence suggests that there are significant racial and ethnic differences in prevalence, insulin resistance, metabolic syndrome, hyperandrogenemia and the related cardiometabolic risk in women with PCOS.
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Affiliation(s)
- D Shah
- The Center for Women's Health and Fertility, Gynaecworld, Mumbai, India
| | - S Rasool
- Government Medical College, Dr Sabahat's Fertility Center, Srinagar, India
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Rasool S, Tayyeb A, Raza MA, Ashfaq H, Perveen S, Kanwal Z, Riaz S, Naseem S, Abbas N, Ahmad N, Alomar SY. Citrullus colocynthis-Mediated Green Synthesis of Silver Nanoparticles and Their Antiproliferative Action against Breast Cancer Cells and Bactericidal Roles against Human Pathogens. Nanomaterials (Basel) 2022; 12:3781. [PMID: 36364557 PMCID: PMC9658276 DOI: 10.3390/nano12213781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 10/12/2022] [Accepted: 10/23/2022] [Indexed: 06/16/2023]
Abstract
The present study investigated the biomedical potential of eco-friendly Citrullus colocynthis-mediated silver nanoparticles (Cc-AgNPs). The antibacterial efficacy of Cc-AgNPs was evaluated against two multidrug-resistant pathogenic bacterial strains, Escherichia coli and Pseudomonas aeruginosa. The antiproliferative and antilipidemic performance of the prepared particles was determined against the MCF7 cell line, a breast cancer cell line. The in vitro antibacterial assay revealed that Cc-AgNPs induced dose-dependent bactericidal activity, as a considerable increase in the zone of inhibition (ZOI) was noted at higher concentrations. Reduced proliferation, migration, spheroid size, and colony formation exhibited the substantial antiproliferative potential of Cc-AgNPs against MCF7 cells. Significant alterations in the expression of cell surface markers, apoptosis, and cell proliferation genes further confirmed the antiproliferative impact of Cc-AgNPs. Moreover, Cc-AgNPs exhibited antilipidemic activity by reducing cellular cholesterol and triglyceride levels and regulating key genes involved in lipogenesis. In conclusion, these results propose that Cc-AgNPs can be employed as a potent tool for future antibacterial and anticancer applications.
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Affiliation(s)
- Shafqat Rasool
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan
| | - Asima Tayyeb
- School of Biological Sciences, University of the Punjab, Lahore 54590, Pakistan
| | - Muhammad Akram Raza
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan
| | - Hanfa Ashfaq
- School of Biological Sciences, University of the Punjab, Lahore 54590, Pakistan
| | - Sadia Perveen
- School of Biological Sciences, University of the Punjab, Lahore 54590, Pakistan
| | - Zakia Kanwal
- Department of Zoology, Lahore College for Women University, Jail Road, Lahore 54000, Pakistan
| | - Saira Riaz
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan
| | - Shahzad Naseem
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan
| | - Nadeem Abbas
- Department of Chemistry, University of Leicester, Leicester LE1 7RH, UK
| | - Naushad Ahmad
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Suliman Yousef Alomar
- Zoology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
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Khan SS, Zargar SA, Gupta VK, Verma V, Rasool S. Isolation and Identification of Bacterial and Fungal Endophytes from Selected Plants of Western Himalayas in Prospect for Bioactivities of Economic Importance. BIOL BULL+ 2022. [DOI: 10.1134/s1062359022050090] [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: 11/23/2022]
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Maruszczak KK, Jung M, Rasool S, Trempe JF, Rapaport D. The role of the individual TOM subunits in the association of PINK1 with depolarized mitochondria. J Mol Med (Berl) 2022; 100:747-762. [PMID: 35391620 PMCID: PMC9110474 DOI: 10.1007/s00109-022-02191-6] [Citation(s) in RCA: 6] [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: 01/25/2022] [Revised: 03/08/2022] [Accepted: 03/17/2022] [Indexed: 11/18/2022]
Abstract
Abstract Mitochondria dysfunction is involved in the pathomechanism of many illnesses including Parkinson’s disease. PINK1, which is mutated in some cases of familial Parkinsonism, is a key component in the degradation of damaged mitochondria by mitophagy. The accumulation of PINK1 on the mitochondrial outer membrane (MOM) of compromised organelles is crucial for the induction of mitophagy, but the molecular mechanism of this process is still unresolved. Here, we investigate the association of PINK1 with the TOM complex. We demonstrate that PINK1 heavily relies on the import receptor TOM70 for its association with mitochondria and directly interacts with this receptor. The structural protein TOM7 appears to play only a moderate role in PINK1 association with the TOM complex, probably due to its role in stabilizing this complex. PINK1 requires the TOM40 pore lumen for its stable interaction with the TOM complex and apparently remains there during its further association with the MOM. Overall, this study provides new insights on the role of the individual TOM subunits in the association of PINK1 with the MOM of depolarized mitochondria. Key messages TOM70 is the main receptor for the import of PINK1 into mitochondria. TOM20 plays only a minor role in PINK1 recognition at the organellar outer membrane. PINK1 association with the TOM complex is reduced upon knock-down of TOM7. The lumen of the TOM pore is crucial for PINK1 association with the outer membrane. TcPINK1 blocks the TOM pore in depolarized mitochondria.
Supplementary Information The online version contains supplementary material available at 10.1007/s00109-022-02191-6.
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Affiliation(s)
- Klaudia K Maruszczak
- Interfaculty Institute of Biochemistry, University of Tübingen, Auf der Morgenstelle 34, 72076 Tübingen, Germany
| | - Martin Jung
- Medical Biochemistry and Molecular Biology, Saarland University, UKS, 66421 Homburg, Germany
| | - Shafqat Rasool
- Department of Pharmacology & Therapeutics and Centre de Recherche en Biologie Structurale, McGill University, Montréal, Québec, Canada
| | - Jean-François Trempe
- Department of Pharmacology & Therapeutics and Centre de Recherche en Biologie Structurale, McGill University, Montréal, Québec, Canada
| | - Doron Rapaport
- Interfaculty Institute of Biochemistry, University of Tübingen, Auf der Morgenstelle 34, 72076 Tübingen, Germany.
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Vranas M, Lu Y, Rasool S, Croteau N, Krett JD, Sauvé V, Gehring K, Fon EA, Durcan TM, Trempe JF. Selective localization of Mfn2 near PINK1 enables its preferential ubiquitination by Parkin on mitochondria. Open Biol 2022; 12:210255. [PMID: 35042405 PMCID: PMC8767196 DOI: 10.1098/rsob.210255] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [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: 01/12/2023] Open
Abstract
Mutations in Parkin and PINK1 cause early-onset familial Parkinson's disease. Parkin is a RING-In-Between-RING E3 ligase that transfers ubiquitin from an E2 enzyme to a substrate in two steps: (i) thioester intermediate formation on Parkin and (ii) acyl transfer to a substrate lysine. The process is triggered by PINK1, which phosphorylates ubiquitin on damaged mitochondria, which in turn recruits and activates Parkin. This leads to the ubiquitination of outer mitochondrial membrane proteins and clearance of the organelle. While the targets of Parkin on mitochondria are known, the factors determining substrate selectivity remain unclear. To investigate this, we examined how Parkin catalyses ubiquitin transfer to substrates. We found that His433 in the RING2 domain contributes to the catalysis of acyl transfer. In cells, the mutation of His433 impairs mitophagy. In vitro ubiquitination assays with isolated mitochondria show that Mfn2 is a kinetically preferred substrate. Using proximity-ligation assays, we show that Mfn2 specifically co-localizes with PINK1 and phospho-ubiquitin (pUb) in U2OS cells upon mitochondrial depolarization. We propose a model whereby ubiquitination of Mfn2 is efficient by virtue of its localization near PINK1, which leads to the recruitment and activation of Parkin via pUb at these sites.
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Affiliation(s)
- Marta Vranas
- Department of Pharmacology and Therapeutics, McGill University, Montréal, Québec, Canada.,Centre de Recherche en Biologie Structurale, McGill University, Montréal, Québec, Canada
| | - Yang Lu
- Department of Pharmacology and Therapeutics, McGill University, Montréal, Québec, Canada.,Centre de Recherche en Biologie Structurale, McGill University, Montréal, Québec, Canada
| | - Shafqat Rasool
- Department of Pharmacology and Therapeutics, McGill University, Montréal, Québec, Canada.,Centre de Recherche en Biologie Structurale, McGill University, Montréal, Québec, Canada
| | - Nathalie Croteau
- Department of Pharmacology and Therapeutics, McGill University, Montréal, Québec, Canada.,Centre de Recherche en Biologie Structurale, McGill University, Montréal, Québec, Canada
| | - Jonathan D Krett
- McGill Parkinson Program and Neurodegenerative Diseases Group, Montreal Neurological Institute and Department of Neurology and Neurosurgery, McGill University, Montréal, Québec, Canada
| | - Véronique Sauvé
- Department of Biochemistry, McGill University, Montréal, Québec, Canada.,Centre de Recherche en Biologie Structurale, McGill University, Montréal, Québec, Canada
| | - Kalle Gehring
- Department of Biochemistry, McGill University, Montréal, Québec, Canada.,Centre de Recherche en Biologie Structurale, McGill University, Montréal, Québec, Canada
| | - Edward A Fon
- McGill Parkinson Program and Neurodegenerative Diseases Group, Montreal Neurological Institute and Department of Neurology and Neurosurgery, McGill University, Montréal, Québec, Canada
| | - Thomas M Durcan
- McGill Parkinson Program and Neurodegenerative Diseases Group, Montreal Neurological Institute and Department of Neurology and Neurosurgery, McGill University, Montréal, Québec, Canada
| | - Jean-François Trempe
- Department of Pharmacology and Therapeutics, McGill University, Montréal, Québec, Canada.,Centre de Recherche en Biologie Structurale, McGill University, Montréal, Québec, Canada
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Rasool S, Veyron S, Soya N, Eldeeb MA, Lukacs GL, Fon EA, Trempe JF. Mechanism of PINK1 activation by autophosphorylation and insights into assembly on the TOM complex. Mol Cell 2021; 82:44-59.e6. [PMID: 34875213 DOI: 10.1016/j.molcel.2021.11.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 10/05/2021] [Accepted: 11/11/2021] [Indexed: 12/26/2022]
Abstract
Mutations in PINK1 cause autosomal-recessive Parkinson's disease. Mitochondrial damage results in PINK1 import arrest on the translocase of the outer mitochondrial membrane (TOM) complex, resulting in the activation of its ubiquitin kinase activity by autophosphorylation and initiation of Parkin-dependent mitochondrial clearance. Herein, we report crystal structures of the entire cytosolic domain of insect PINK1. Our structures reveal a dimeric autophosphorylation complex targeting phosphorylation at the invariant Ser205 (human Ser228). The dimer interface requires insert 2, which is unique to PINK1. The structures also reveal how an N-terminal helix binds to the C-terminal extension and provide insights into stabilization of PINK1 on the core TOM complex.
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Affiliation(s)
- Shafqat Rasool
- Department of Pharmacology & Therapeutics and Centre de Recherche en Biologie Structurale, McGill University, Montréal, QC, Canada
| | - Simon Veyron
- Department of Pharmacology & Therapeutics and Centre de Recherche en Biologie Structurale, McGill University, Montréal, QC, Canada
| | - Naoto Soya
- Department of Physiology and Centre de Recherche en Biologie Structurale, McGill University, Montréal, QC, Canada
| | - Mohamed A Eldeeb
- McGill Parkinson Program and Neurodegenerative Diseases Group, Montreal Neurological Institute and Department of Neurology and Neurosurgery, McGill University, Montréal, QC, Canada
| | - Gergely L Lukacs
- Department of Physiology and Centre de Recherche en Biologie Structurale, McGill University, Montréal, QC, Canada
| | - Edward A Fon
- McGill Parkinson Program and Neurodegenerative Diseases Group, Montreal Neurological Institute and Department of Neurology and Neurosurgery, McGill University, Montréal, QC, Canada
| | - Jean-François Trempe
- Department of Pharmacology & Therapeutics and Centre de Recherche en Biologie Structurale, McGill University, Montréal, QC, Canada.
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Dilshad MA, Sarwar S, Aslam F, Shabbir A, Rasool S, Tayyab GUN. Risk of Covid-19 infection during endoscopy: Efficacy of personal protective equipment (PPE) in protecting health professionals. Pak J Med Sci 2021; 37:1093-1098. [PMID: 34290789 PMCID: PMC8281186 DOI: 10.12669/pjms.37.4.4057] [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] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 03/01/2021] [Accepted: 03/15/2021] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES To correlate compliance to personal protective equipment (PPE) protocols and risk of exposure to SARS-COV-2 infection in endoscopy staff. METHODS We included 85 endoscopic procedures performed at Lahore General Hospital from May to July 2020. Standard operating procedures (SOPs) were implemented for patient selection, risk stratification and personal protective equipment (PPE) use for endoscopy staff. Patient and endoscopy staff were followed for Covid-19 infection. PPE scores for staff and Covid-19 positivity on follow-up were correlated using student's t test. RESULTS Following 85 procedures included, 2 (2.3%) patients became Covid-19 positive. PPE score was <9 in 5 (5.8%) procedures for endoscopist and Covid-19 developed in 2 (2.3%) of them, PPE score was <9 during 19 (22.3%) procedures in 1st assistant and 9 (10.5%) developed infection and for 2nd assistant PPE score was <9 in 19(22.3%) endoscopies and 5 (5.9%) tested positive for covid-19. Infectivity of endoscopy staff was 6.2%. Association between PPE score and risk of Covid-19 was not significant. (p value 0.51 for endoscopist, 0.10 for 1st assistant and 0.09 for 2nd assistant). CONCLUSION Compliance of SOPs for infection control reduces risk of acquiring Covid-19 infection during endoscopy. Proper use of PPE is effective for safety of endoscopy staff.
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Affiliation(s)
- Muhammad Akif Dilshad
- Dr. Akif Dilshad, MBBS, FCPS (Gastroenterology). Associate Professor Gastroenterology, Lahore General Hospital, Lahore, Pakistan
| | - Shahid Sarwar
- Dr. Shahid Sarwar, MBBS, FCPS (Medicine), FCPS (Gastroenterology), MCPS-HPE, FRCP (Edin) Professor of Medicine, Allama Iqbal Medical College, Lahore, Pakistan
| | - Farheen Aslam
- Farheen Aslam, PhD. Assistant Professor, Department of Biotechnology, Lahore College for Women University, Lahore, Pakistan
| | - Adnan Shabbir
- Adnan Shabbir, MBBS. Post Graduate Resident Gastroenterology Lahore General Hospital, Lahore, Pakistan
| | - Shafqat Rasool
- Shafqat Rasool, MBBS, FCPS (Gastroenterology). Assistant Professor Gastroenterology Lahore General Hospital, Lahore, Pakistan
| | - Ghias un-Nabi Tayyab
- Ghias Un Nabi Tayyab, MBBS, MRCP (UK) FCPS, FRCP (Edin) AGAF (USA). Professor of Medicine, Lahore General Hospital, Lahore, Pakistan
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Shaheen G, Fatima I, Noor R, Younus M, Sajid-Ur-Rehman M, Ghaffar S, Rasool S, Zafar F, Khan MA. Diabetes Mellitus: An Overview and Management with Herbs. JPRI 2021. [DOI: 10.9734/jpri/2021/v33i28a31509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Diabetes mellitus (DM) could be a typical disturbed throughout the globe. As of late, there are changed sorts of examinations and overview works region units considered. The individuals' Republic of Pakistan is that the place where there is magnificence while the common plants have selective meditative ayurvedic movement against inside emission Subordinate Diabetic Mellitus (IDDM) and Non-Insulin Subordinate Diabetic Mellitus (NIDDM). Among a few meds furthermore distinctive different meds, numerous herbs are praised to fix and the board diabetes; to boot they need no aspect impacts inside the prior some of the years, there must be an exponential development inside the arena of prescription then increasing quality each inside creating including created nations owing to their common source and fewer feature impacts during this audit work, we will in general essentially observe some potential plants therapeutic medication movement in the Individuals' Republic of Pakistan. A far-reaching audit of this paper is preliminary to a rundown of the plants with hostile to diabetic and associated valuable impacts beginning from entirely unexpected parts of the world. History indicated that meditative plants are utilized in old recuperating around the world for an all-inclusive chance to manage diabetes; here is frequently because of such herbs must manifestation characteristics moreover distinctive valuable features, while announced into logical writing. This effort increased this since quite a while ago run analyzers for extra exploration of the potential utilization of meditative plants having therapeutic medication potential just as indication action, inward emission mimetic movement, and cancer prevention agent action.
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Mehmood A, Raja AJ, Rasool S, Haque IU, NabiTayyab GU. Significance of Testing Anti-HBcIgM Antibodies for the Screening of Hepatitis B in the Donor Blood. J Ayub Med Coll Abbottabad 2020; 32(Suppl 1):S618-S620. [PMID: 33754518] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
BACKGROUND The purpose to perform this study was to screen blood donors for possible occult HBV by checking the seroprevalence of the hepatitis B antibodies in blood donors. It was a Cross-sectional study conducted at Blood Bank of Lahore General Hospital Lahore from April to June 2015 (3-months). METHODS In this prospective study, 180 healthy blood donors, presenting to the blood bank of Lahore General Hospital were selected. Their detailed demographic data and blood samples were collected. HBsAg testing was done by ELISA and further HBc IgM testing was also done by ELISA. Those testing positive for HBc IgM were further evaluated by real-time PCR to detect HBV DNA. RESULTS Mean duration of the life span was 26.51 years with a range of 18-61 years. Sex distribution show 93.9% (n=169) males and 6.1% (n=11) females. HBsAg was positive in 3.3% (n=6) while their HBc IgM was negative and HBc IGM was positive in 2.2% (n=4) of the healthy donors in whom HBsAg was found negative by ICT method. further qualitative HBV DNA by rt-PCR was done on those positive with anti HBc IgM and no patient had HBV DNA detected from their blood. CONCLUSION Without routine screening of the sera for the HBc Antibody, the low-level HBV viraemia may not be detected as the nonappearance of the surface antigen in the blood of apparently healthy donors do not ensure the absence of circulating virus in the blood of these donors.
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Affiliation(s)
- Asif Mehmood
- Department of Medicine,PGMI/Lahore General Hospital/Ameer-u-Din Medical College Lahore, Pakistan
| | - Arsalan Jamil Raja
- Department of Medicine,PGMI/Lahore General Hospital/Ameer-u-Din Medical College Lahore, Pakistan
| | - Shafqat Rasool
- Department of Medicine,PGMI/Lahore General Hospital/Ameer-u-Din Medical College Lahore, Pakistan
| | - Israr Ul Haque
- Department of Medicine,PGMI/Lahore General Hospital/Ameer-u-Din Medical College Lahore, Pakistan
| | - Ghias Un NabiTayyab
- Department of Medicine,PGMI/Lahore General Hospital/Ameer-u-Din Medical College Lahore, Pakistan
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Rasool S, Raza MA, Manzoor F, Kanwal Z, Riaz S, Iqbal MJ, Naseem S. Biosynthesis, characterization and anti-dengue vector activity of silver nanoparticles prepared from Azadirachta indica and Citrullus colocynthis. R Soc Open Sci 2020; 7:200540. [PMID: 33047022 PMCID: PMC7540756 DOI: 10.1098/rsos.200540] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 08/13/2020] [Indexed: 05/08/2023]
Abstract
We report here biosynthesis of silver nanoparticles (AgNPs) using aqueous extracts of (i) Azadirachta indica leaves and (ii) Citrullus colocynthis fruit and their larvicidal activity against Aedes aegypti. The UV-Vis spectroscopy absorption peaks occurred in the range of 412-416 nm for A. indica AgNPs and 416-431 nm for C. colocynthis AgNPs indicating the silver nature of prepared colloidal samples. The scanning electron microscopy examination revealed the spherical morphology of both types of NPs with average size of 17 ± 4 nm (A. indica AgNPs) and 26 ± 5 nm (C. colocynthis AgNPs). The X-ray diffraction pattern confirmed the face-centred cubic (FCC) structure with crystallite size of 11 ± 1 nm (A. indica AgNPs) and 15 ± 1 nm (C. colocynthis AgNPs) while characteristic peaks appearing in Fourier transform infrared spectroscopy analysis indicated the attachment of different biomolecules on AgNPs. The larvicidal activity at different concentrations of synthesized AgNPs (1-20 mg l-1) and extracts (0.5-1.5%) against Aedes aegypti was examined for 24 h. A concentration-dependent larvicidal potential of both types of AgNPs was observed. The LC50 values were found to be 0.3 and 1.25 mg l-1 for C. colocynthis AgNPs and A. indica AgNPs, respectively. However, both extracts did not exhibit any notable larvicidal activity.
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Affiliation(s)
- Shafqat Rasool
- Centre of Excellence in Solid State Physics, University of the Punjab, Quid-e-Azam Campus, Lahore 54590, Pakistan
| | - Muhammad Akram Raza
- Centre of Excellence in Solid State Physics, University of the Punjab, Quid-e-Azam Campus, Lahore 54590, Pakistan
| | - Farkhanda Manzoor
- Department of Zoology, Lahore College for Women University, Jail Road, Lahore 54000, Pakistan
| | - Zakia Kanwal
- Department of Zoology, Lahore College for Women University, Jail Road, Lahore 54000, Pakistan
| | - Saira Riaz
- Centre of Excellence in Solid State Physics, University of the Punjab, Quid-e-Azam Campus, Lahore 54590, Pakistan
| | - Muhammad Javaid Iqbal
- Centre of Excellence in Solid State Physics, University of the Punjab, Quid-e-Azam Campus, Lahore 54590, Pakistan
| | - Shahzad Naseem
- Centre of Excellence in Solid State Physics, University of the Punjab, Quid-e-Azam Campus, Lahore 54590, Pakistan
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Tayyab GUN, Rasool S, Nasir B, Rubi G, Abou-Samra AB, Butt AA. Hepatocellular carcinoma occurs frequently and early after treatment in HCV genotype 3 infected persons treated with DAA regimens. BMC Gastroenterol 2020; 20:93. [PMID: 32252635 PMCID: PMC7137260 DOI: 10.1186/s12876-020-01249-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 03/27/2020] [Indexed: 02/11/2023] Open
Abstract
BACKGROUND There are conflicting data regarding the risk of hepatocellular carcinoma (HCC) after direct-acting antiviral agent (DAA) treatment. Risk of HCC in HCV genotype-3 infected persons after DAA therapy is not well known. METHODS We prospectively studied HCV infected persons initiated on a DAA regimen between October 2014 and March 2017 at two centers in Pakistan. All persons were free of HCC at study initiation. HCC was confirmed based on characteristic CT scan findings. Patients were followed for 12 months after the completion of therapy. RESULTS A total of 662 persons initiated treatment. Median age (IQR) was 50 (41, 57) years and 48.8% were male. At baseline, 49.4% were cirrhotic, 91% were genotype 3 and 91.9% attained SVR. Treatment regimens used were: Sofosbuvir (SOF)/ribavirin (RBV)/pegylated interferon (PEG-IFN), 25.2%; SOF/RBV, 62.4%; SOF/RBV/daclatasavir (DCV), 10.6%; SOF/DCV, 2.0%. Incident HCC was detected in 42 patients (12.8%) in the 12-month period after treatment completion and was exclusively observed in those with cirrhosis. In multivariable Cox regression analysis, SVR was associated with a reduction in HCC risk (HR, 95% CI: 0.35, 0.14,0.85). In Kaplan-Meier plots by treatment regimen, those treated with SOF/RBV, SOF/RBV/DCV, or SOF/DCV regimens had a shorter HCC-free survival compared with those treated with a SOF/RBV/PEG-IFN regimen. CONCLUSION In a predominantly genotype 3 cohort, incident HCC occurred frequently and early after treatment completion, and exclusively in those with pre-treatment cirrhosis. SVR reduced the risk of HCC. Treating HCV infected persons before development of cirrhosis may reduce risk of HCC.
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Affiliation(s)
- Ghias Un Nabi Tayyab
- Post Graduate Medical Institute, Ameer Ud Din Medical College, Lahore, Pakistan.,Lahore General Hospital, Lahore, Pakistan
| | - Shafqat Rasool
- Post Graduate Medical Institute, Ameer Ud Din Medical College, Lahore, Pakistan.,Lahore General Hospital, Lahore, Pakistan
| | - Bilal Nasir
- Post Graduate Medical Institute, Ameer Ud Din Medical College, Lahore, Pakistan.,Lahore General Hospital, Lahore, Pakistan
| | - Ghazala Rubi
- Post Graduate Medical Institute, Ameer Ud Din Medical College, Lahore, Pakistan.,Lahore General Hospital, Lahore, Pakistan
| | - Abdul-Badi Abou-Samra
- Weill Cornell Medical College, New York, NY, USA.,Weill Cornell Medical College, Doha, Qatar.,Hamad Medical Corporation, Doha, Qatar
| | - Adeel A Butt
- Weill Cornell Medical College, New York, NY, USA. .,Weill Cornell Medical College, Doha, Qatar. .,Hamad Medical Corporation, Doha, Qatar.
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Un Nabi Tayyab G, Rasool S, Nasir B, Butt AA. 304. Hepatocellular Carcinoma Occurs Frequently and Early After Treatment in HCV Genotype 3 Infected Persons Treated with DAA Regimens. Open Forum Infect Dis 2019. [PMCID: PMC6809789 DOI: 10.1093/ofid/ofz360.377] [Citation(s) in RCA: 0] [Impact Index Per Article: 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] [Indexed: 11/29/2022] Open
Abstract
Background Treatment of HCV with directly acting antiviral agents (DAAs) is associated with a significant reduction in cardiovascular, metabolic and cancer risk. However, there are conflicting data regarding the risk of hepatocellular carcinoma (HCC) after DAA treatment. Risk of HCC in HCV genotype 3 infected persons after DAA therapy is not well known. Methods We prospectively studied HCV-infected persons initiated on treatment between October 2014 and March 2017 at two centers in Pakistan. All persons were free of HCC at study initiation. The occurrence of HCC was confirmed based on radiologic findings on a triphasic CT on 64 slice MDCT scanner. The treatment regimen was at the discretion of clinical care providers, taking into account the national guidelines and patient preferences. Patients were followed for 24 weeks after the completion of therapy. Informed consent was obtained from all participants. Results A total of 662 persons were initiated on treatment. Median age (IQR) was 50 (41, 57) years and 48.8% were male. At baseline, 49.4% were cirrhotic with 90% of cirrhotics having compensated cirrhosis. 91% were genotype 3 and SVR was attained in 91.9%. Treatment regimens used were: Sofosbuvir (SOF)/ribavirin (RBV)/pegylated interferon (PEG-IFN), 25.2%; SOF/RBV, 62.4%; SOF/RBV/daclatasavir (DCL), 10.6%; SOF/DCL, 2.0%. Incident HCC was detected in 42 patients (12.8%) in the six month period after treatment completion, and was exclusively observed in those with cirrhosis. In multivariable Cox regression analysis, SVR was associated with a reduction in HCC risk (HR, 95% CI: 0.35, 0.14,0.85) while SOF/RBV/DCL regimen (compared with SOF/RBV/PEG-IFN) was associated with an increased risk of HCC (HR, 95% CI: 17.32, 2.14,140.36). In K-M plots by treatment regimen, those treated with SOF/RBV, SOF/RBV/DCL, or SOF/DCL regimens had shorter HCC-free survival compared with those treated with a SOF/RBV/PEG-IFN regimen. (See figure) Conclusion In a predominantly genotype 3 cohort, incident HCC occurs commonly and early after treatment completion, and exclusively in those with pretreatment cirrhosis. SVR reduces but does not completely eliminate the risk of HCC. Treating HCV-infected persons before the development of cirrhosis may reduce future risk of HCC. ![]()
Disclosures All authors: No reported disclosures.
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Affiliation(s)
- Ghias Un Nabi Tayyab
- Post Graduate Medical Institute/Ameer Ud Din Medical College/Lahore General Hospital, Lahore, Punjab, Pakistan
| | - Shafqat Rasool
- Post Graduate Medical Institute/Ameer Ud Din Medical College/Lahore General Hospital, Lahore, Punjab, Pakistan
| | - Bilal Nasir
- Post Graduate Medical Institute/Ameer Ud Din Medical College/Lahore General Hospital, Lahore, Punjab, Pakistan
| | - Adeel A Butt
- Weill Cornell Medical College, Doha, Ad Dawhah, Qatar
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Abstract
Mutations in PINK1 cause early-onset recessive Parkinson's disease. This gene encodes a protein kinase implicated in mitochondrial quality control via ubiquitin phosphorylation and activation of the E3 ubiquitin ligase Parkin. Here, we review and analyze functional features emerging from recent crystallographic, nuclear magnetic resonance (NMR) and mass spectrometry studies of PINK1. We compare the apo and ubiquitin-bound PINK1 structures and reveal an allosteric switch, regulated by autophosphorylation, which modulates substrate recognition. We critically assess the conformational changes taking place in ubiquitin and the Parkin ubiquitin-like domain in relation to its binding to PINK1. Finally, we discuss the implications of these biophysical findings in our understanding of the role of PINK1 in mitochondrial function, and analyze the potential for structure-based drug design.
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Affiliation(s)
- Shafqat Rasool
- a Department of Biochemistry , McGill University , Montréal , Canada.,b Groupe de Recherche Axé sur la Structure des Protéines (GRASP) , Montréal , Canada
| | - Jean-François Trempe
- b Groupe de Recherche Axé sur la Structure des Protéines (GRASP) , Montréal , Canada.,c Department of Pharmacology & Therapeutics , McGill University , Montréal , Canada
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Rasool S, Soya N, Truong L, Croteau N, Lukacs GL, Trempe JF. PINK1 autophosphorylation is required for ubiquitin recognition. EMBO Rep 2018; 19:embr.201744981. [PMID: 29475881 DOI: 10.15252/embr.201744981] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [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: 08/14/2017] [Revised: 01/26/2018] [Accepted: 02/01/2018] [Indexed: 11/09/2022] Open
Abstract
Mutations in PINK1 cause autosomal recessive Parkinson's disease (PD), a neurodegenerative movement disorder. PINK1 is a kinase that acts as a sensor of mitochondrial damage and initiates Parkin-mediated clearance of the damaged organelle. PINK1 phosphorylates Ser65 in both ubiquitin and the ubiquitin-like (Ubl) domain of Parkin, which stimulates its E3 ligase activity. Autophosphorylation of PINK1 is required for Parkin activation, but how this modulates the ubiquitin kinase activity is unclear. Here, we show that autophosphorylation of Tribolium castaneum PINK1 is required for substrate recognition. Using enzyme kinetics and NMR spectroscopy, we reveal that PINK1 binds the Parkin Ubl with a 10-fold higher affinity than ubiquitin via a conserved interface that is also implicated in RING1 and SH3 binding. The interaction requires phosphorylation at Ser205, an invariant PINK1 residue (Ser228 in human). Using mass spectrometry, we demonstrate that PINK1 rapidly autophosphorylates in trans at Ser205. Small-angle X-ray scattering and hydrogen-deuterium exchange experiments provide insights into the structure of the PINK1 catalytic domain. Our findings suggest that multiple PINK1 molecules autophosphorylate first prior to binding and phosphorylating ubiquitin and Parkin.
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Affiliation(s)
- Shafqat Rasool
- Department of Pharmacology & Therapeutics and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montréal, QC, Canada.,Department of Biochemistry, McGill University, Montréal, QC, Canada
| | - Naoto Soya
- Department of Physiology and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montréal, QC, Canada
| | - Luc Truong
- Department of Pharmacology & Therapeutics and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montréal, QC, Canada
| | - Nathalie Croteau
- Department of Pharmacology & Therapeutics and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montréal, QC, Canada
| | - Gergely L Lukacs
- Department of Biochemistry, McGill University, Montréal, QC, Canada.,Department of Physiology and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montréal, QC, Canada
| | - Jean-François Trempe
- Department of Pharmacology & Therapeutics and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montréal, QC, Canada
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Mahmood T, Rasool S, Akrim F, Andleeb S, Nadeem MS, Nadeem F. Diversity and Nest Characteristics of Owl Species Inhabiting Margalla Hills National Park Islamabad, Pakistan. PAK J ZOOL 2018. [DOI: 10.17582/journal.pjz/2018.50.4.sc16] [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: 11/24/2022]
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Affiliation(s)
- S. Rasool
- Department of Reproductive Medicine, Gynaecworld, Mumbai, India
| | - D. Shah
- Department of Reproductive Medicine, Gynaecworld, Mumbai, India
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Aziz-ur-Rehman, Arif A, Abbasi MA, Siddiqui SZ, Rasool S, Shah SAA. Synthesis and pharmacological screening: Sulfa derivatives of 2-pipecoline-bearing 1,3,4-oxadiazole core. Russ J Bioorg Chem 2017. [DOI: 10.1134/s1068162017030025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Munir A, Rehman AU, Abbasi M, Siddiqui S, Nasir A, Khan S, Rasool S, Shah S. Synthesis and molecular docking of new hydrazones derived from ethyl isonipecotate and their biological activities. TROP J PHARM RES 2017. [DOI: 10.4314/tjpr.v16i5.25] [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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Rasool S, Roy B. Comparison of hospitalization rates in schizophrenic patients on first generation versus second generation antipsychotic depots. Eur Psychiatry 2017. [DOI: 10.1016/j.eurpsy.2017.01.1629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
IntroductionThere is limited data on the efficacy rates between first and second generation antipsychotic depots. One good indicator of efficacy is the rates of hospitalization. Some studies have shown that second generation depot antipsychotics significantly reduce hospitalizations rates as compared to conventional depots.ObjectivesComparison of hospitalization rates for patients with schizophrenia on first and second generation antipsychotic depots.MethodsA retrospective observational study was done by reviewing the records of an antipsychotic depot clinic in Essex, United Kingdom. A list of 47 patients enrolled and receiving depot antipsychotics was obtained. Their records were studied and hospital admission rates calculated.ResultsOf the 47 patients 11 were excluded as they were on depot antipsychotics for non-schizophrenic diagnoses.Of the 36 patients with schizophrenia, 12 were on second generation and 24 were on first generation depots.Amongst the 24 patients on first generation depots, 19 were male, 5 female and mean age was 52 years.Of the 12 patients on second generation depots, 10 were male and 2 female and mean age was 46 years.When comparing hospital admission rates between the 2 groups, the following data was noted (Table 1).ConclusionsThere is no difference in hospitalization rates between patients on first generation antipsychotic depots as compared to second generation antipsychotic depots.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Rasool S, Narang D, Chandra M, Sharma NS, Tejinder Singh S. Detection of Mycobacterium avium subsp. paratuberculosis in bovine faecal samples by Quantitative Real-Time Polymerase Chain Reaction (qRT-PCR) TaqMan Assay. Trop Biomed 2016; 33:327-334. [PMID: 33579100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Mycobacterium avium subsp. paratuberculosis, the causative agent of Johne's disease is a degenerative chronic granulomatous disease of bovines. In the present study, quantitative real time polymerase chain reaction (qRT-PCR) using TaqMan chemistry targeting the IS900 sequence of Mycobacterium avium subsp. paratuberculosis (MAP) was employed for the molecular diagnosis of the disease in bovine faecal samples. Out of 200 bovine faecal samples processed, 7 samples were tested as positive by IS900 qRT-PCR. The sensitivity limit of detection of MAP DNA in faecal samples by qRT-PCR TaqMan assay was found to be 0.05pg. No amplification was observed in other Mycobacterial spp. viz. M. phlei, M. smegmatis, M. intracellulare and M. kansasii.
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Affiliation(s)
- S Rasool
- Department of Veterinary Microbiology
| | - D Narang
- Department of Veterinary Microbiology
| | - M Chandra
- Department of Veterinary Microbiology
| | | | - S Tejinder Singh
- Department of Animal Genetics and Breeding, COVS, GADVASU, Ludhiana
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Dar R, Rasool S, Zargar AH, Jan TR, Andrabi KI. Polymorphic analysis of MC4R gene in ethnic Kashmiri population with type 2 diabetes. Int J Diabetes Dev Ctries 2015. [DOI: 10.1007/s13410-015-0454-5] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Pandini A, Kleinjung J, Rasool S, Khan S. Coevolved Mutations Reveal Distinct Architectures for Two Core Proteins in the Bacterial Flagellar Motor. PLoS One 2015; 10:e0142407. [PMID: 26561852 PMCID: PMC4642947 DOI: 10.1371/journal.pone.0142407] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 10/21/2015] [Indexed: 02/08/2023] Open
Abstract
Switching of bacterial flagellar rotation is caused by large domain movements of the FliG protein triggered by binding of the signal protein CheY to FliM. FliG and FliM form adjacent multi-subunit arrays within the basal body C-ring. The movements alter the interaction of the FliG C-terminal (FliGC) “torque” helix with the stator complexes. Atomic models based on the Salmonella entrovar C-ring electron microscopy reconstruction have implications for switching, but lack consensus on the relative locations of the FliG armadillo (ARM) domains (amino-terminal (FliGN), middle (FliGM) and FliGC) as well as changes during chemotaxis. The generality of the Salmonella model is challenged by the variation in motor morphology and response between species. We studied coevolved residue mutations to determine the unifying elements of switch architecture. Residue interactions, measured by their coevolution, were formalized as a network, guided by structural data. Our measurements reveal a common design with dedicated switch and motor modules. The FliM middle domain (FliMM) has extensive connectivity most simply explained by conserved intra and inter-subunit contacts. In contrast, FliG has patchy, complex architecture. Conserved structural motifs form interacting nodes in the coevolution network that wire FliMM to the FliGC C-terminal, four-helix motor module (C3-6). FliG C3-6 coevolution is organized around the torque helix, differently from other ARM domains. The nodes form separated, surface-proximal patches that are targeted by deleterious mutations as in other allosteric systems. The dominant node is formed by the EHPQ motif at the FliMMFliGM contact interface and adjacent helix residues at a central location within FliGM. The node interacts with nodes in the N-terminal FliGc α-helix triad (ARM-C) and FliGN. ARM-C, separated from C3-6 by the MFVF motif, has poor intra-network connectivity consistent with its variable orientation revealed by structural data. ARM-C could be the convertor element that provides mechanistic and species diversity.
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Affiliation(s)
- Alessandro Pandini
- Department of Computer Science and Synthetic Biology Theme, Brunel University London, Uxbridge UB8 3PH, United Kingdom
| | - Jens Kleinjung
- Mathematical Biology, Francis Crick Institute, Ridgeway, Mill Hill, London NW7 1AA, United Kingdom
| | - Shafqat Rasool
- Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Shahid Khan
- Molecular Biology Consortium, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America
- * E-mail:
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Sauvé V, Lilov A, Seirafi M, Vranas M, Rasool S, Kozlov G, Sprules T, Wang J, Trempe JF, Gehring K. A Ubl/ubiquitin switch in the activation of Parkin. EMBO J 2015; 34:2492-505. [PMID: 26254305 PMCID: PMC4609182 DOI: 10.15252/embj.201592237] [Citation(s) in RCA: 148] [Impact Index Per Article: 16.4] [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: 06/07/2015] [Accepted: 07/24/2015] [Indexed: 11/23/2022] Open
Abstract
Mutations in Parkin and PINK1 cause an inherited early-onset form of Parkinson's disease. The two proteins function together in a mitochondrial quality control pathway whereby PINK1 accumulates on damaged mitochondria and activates Parkin to induce mitophagy. How PINK1 kinase activity releases the auto-inhibited ubiquitin ligase activity of Parkin remains unclear. Here, we identify a binding switch between phospho-ubiquitin (pUb) and the ubiquitin-like domain (Ubl) of Parkin as a key element. By mutagenesis and SAXS, we show that pUb binds to RING1 of Parkin at a site formed by His302 and Arg305. pUb binding promotes disengagement of the Ubl from RING1 and subsequent Parkin phosphorylation. A crystal structure of Parkin Δ86–130 at 2.54 Å resolution allowed the design of mutations that specifically release the Ubl domain from RING1. These mutations mimic pUb binding and promote Parkin phosphorylation. Measurements of the E2 ubiquitin-conjugating enzyme UbcH7 binding to Parkin and Parkin E3 ligase activity suggest that Parkin phosphorylation regulates E3 ligase activity downstream of pUb binding.
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Affiliation(s)
- Véronique Sauvé
- Groupe de recherché axé sur la structure des protéines and Department of Biochemistry, McGill University, Montréal, QC, Canada
| | - Asparouh Lilov
- Groupe de recherché axé sur la structure des protéines and Department of Biochemistry, McGill University, Montréal, QC, Canada
| | - Marjan Seirafi
- Groupe de recherché axé sur la structure des protéines and Department of Biochemistry, McGill University, Montréal, QC, Canada
| | - Marta Vranas
- Department of Pharmacology and Therapeutics, McGill University, Montréal, QC, Canada
| | - Shafqat Rasool
- Groupe de recherché axé sur la structure des protéines and Department of Biochemistry, McGill University, Montréal, QC, Canada Department of Pharmacology and Therapeutics, McGill University, Montréal, QC, Canada
| | - Guennadi Kozlov
- Groupe de recherché axé sur la structure des protéines and Department of Biochemistry, McGill University, Montréal, QC, Canada
| | - Tara Sprules
- Quebec/Eastern Canada High Field NMR Facility (QANUC), Montréal, QC, Canada
| | - Jimin Wang
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA
| | - Jean-François Trempe
- Department of Pharmacology and Therapeutics, McGill University, Montréal, QC, Canada
| | - Kalle Gehring
- Groupe de recherché axé sur la structure des protéines and Department of Biochemistry, McGill University, Montréal, QC, Canada
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Rasool S, Rehman A, Abbasi MA, Gul S, Akhtar MN, Ahmad I, Afzal S. Synthesis of N'-Substituted-2-(5-(4-Chlorophenyl)-1,3,4- oxadiazol-2-ylthio)acetohydrazide Derivatives as Suitable Antibacterial Agents. TROP J PHARM RES 2015. [DOI: 10.4314/tjpr.v14i6.21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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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Abbasi MA, Najm S, Rehman A, Rasool S, Khan KM, Ashraf M, Nasar R, Alam U. Evaluation of Sulfonamide Derivatives of Dagenan Chloride as Lipoxygenase and α-Glucosidase Inhibitors. TROP J PHARM RES 2015. [DOI: 10.4314/tjpr.v14i1.8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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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Siddiqa A, Rehman A, Abbasi MA, Rasool S, Khan KM, Ahmad I, Afzal S. Synthesis and antibacterial evaluation of 2-(1,3- Benzodioxol-5-ylcarbonyl)arylsulfonohydrazide derivatives. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i10.17] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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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Abbasi MA, Ahmad S, Rehman A, Rasool S, Khan KM, Ashraf M, Nasar R, Ismail T. Sulfonamide Derivatives of 2-Amino-1-phenylethane as Suitable Cholinesterase Inhibitors. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i5.13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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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Almeman AA, Ibrahim MIM, Rasool S. Cost Analysis of Medications Used in Upper Respiratory Tract Infections and Prescribing Patterns in University Sans Malaysia, Penang, Malaysia. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i4.21] [Citation(s) in RCA: 6] [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: 11/17/2022] Open
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Affiliation(s)
- S. Rasool
- Department of Dermatology; Leicester Royal Infirmary; Leicester UK
| | - G. A. Johnston
- Department of Dermatology; Leicester Royal Infirmary; Leicester UK
| | - M. Bamford
- Department of Dermatology; Leicester Royal Infirmary; Leicester UK
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Almeman A, Alkhoshaiban AS, Rasool S. Prescribing Practices and Cost of Drugs for Peptic Ulcer in a Primary Health Center in Pulau Penang, Malaysia. TROP J PHARM RES 2013. [DOI: 10.4314/tjpr.v12i4.28] [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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Alvi Z, Mahmood A, Rasool S, Ali U, Arif S, Ishtiaq S, Maqsood T. PO-107: Role of Honey in Prevention of Radiation Induced Mucositis in Head and Neck Cancer. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)34726-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
OBJECTIVE Hospital admission, especially for the elderly, can be a seminal event as many patients die within a year. This study reports the prediction of death within a year of admission to hospital of the Simple Clinical Score (SCS) and ECG dispersion mapping (ECG-DM). ECG-DM is a novel technique that analyzes low-amplitude ECG oscillations and reports them as the myocardial micro-alternation index (MMI). METHODS a convenient sample of 430 acutely ill medical patients (mean age 67.9 ± 16.6 years) was followed up for 1 year after their last admission to hospital. RESULTS Seventy-four (16.3%) patients died within a year-all but seven had a SCS ≥5 and 40% of those with an MMI ≥50% died. Only six of variables were found by logistic regression to be independent predictors of mortality (i.e. age, MMI, SCS, a discharge diagnosis of cancer, hemoglobin <11 gm% and prior illness that required the patient to spend >50% of daytime in bed). The SCS and MMI plus age were comparable predictors of 1-year mortality: SCS ≥12 predicted 1-year mortality with the highest odds (16.1, chi square 79.09, p < 0.0001) and a score of age plus MMI >104 had an odds ratio of 9.4 (chi square 73.50, p < 0.0001), identified 69% of deaths, and 43% of the 119 patients who exceeded this score were dead within a year. CONCLUSION SCS and ECG-DM plus age are clinically useful for long-term prognostication. ECG-DM is inexpensive, only takes a few seconds to perform and requires no skill to interpret.
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Affiliation(s)
- J Kellett
- Department of Medicine, Nenagh Hospital, Nenagh, County Tipperary, Ireland.
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Jaworek TJ, Kausar T, Bell SM, Tariq N, Maqsood MI, Sohail A, Ali M, Iqbal F, Rasool S, Riazuddin S, Shaikh RS, Ahmed ZM. Molecular genetic studies and delineation of the oculocutaneous albinism phenotype in the Pakistani population. Orphanet J Rare Dis 2012; 7:44. [PMID: 22734612 PMCID: PMC3537634 DOI: 10.1186/1750-1172-7-44] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [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: 12/16/2011] [Accepted: 04/30/2012] [Indexed: 02/01/2023] Open
Abstract
Background Oculocutaneous albinism (OCA) is caused by a group of genetically heterogeneous inherited defects that result in the loss of pigmentation in the eyes, skin and hair. Mutations in the TYR, OCA2, TYRP1 and SLC45A2 genes have been shown to cause isolated OCA. No comprehensive analysis has been conducted to study the spectrum of OCA alleles prevailing in Pakistani albino populations. Methods We enrolled 40 large Pakistani families and screened them for OCA genes and a candidate gene, SLC24A5. Protein function effects were evaluated using in silico prediction algorithms and ex vivo studies in human melanocytes. The effects of splice-site mutations were determined using an exon-trapping assay. Results Screening of the TYR gene revealed four known (p.Arg299His, p.Pro406Leu, p.Gly419Arg, p.Arg278*) and three novel mutations (p.Pro21Leu, p.Cys35Arg, p.Tyr411His) in ten families. Ex vivo studies revealed the retention of an EGFP-tagged mutant (p.Pro21Leu, p.Cys35Arg or p.Tyr411His) tyrosinase in the endoplasmic reticulum (ER) at 37°C, but a significant fraction of p.Cys35Arg and p.Tyr411His left the ER in cells grown at a permissive temperature (31°C). Three novel (p.Asp486Tyr, p.Leu527Arg, c.1045-15 T > G) and two known mutations (p.Pro743Leu, p.Ala787Thr) of OCA2 were found in fourteen families. Exon-trapping assays with a construct containing a novel c.1045-15 T > G mutation revealed an error in splicing. No mutation in TYRP1, SLC45A2, and SLC24A5 was found in the remaining 16 families. Clinical evaluation of the families segregating either TYR or OCA2 mutations showed nystagmus, photophobia, and loss of pigmentation in the skin or hair follicles. Most of the affected individuals had grayish-blue colored eyes. Conclusions Our results show that ten and fourteen families harbored mutations in the TYR and OCA2 genes, respectively. Our findings, along with the results of previous studies, indicate that the p.Cys35Arg, p.Arg278* and p.Gly419Arg alleles of TYR and the p.Asp486Tyr and c.1045-15 T > G alleles of OCA2 are the most common causes of OCA in Pakistani families. To the best of our knowledge, this study represents the first documentation of OCA2 alleles in the Pakistani population. A significant proportion of our cohort did not have mutations in known OCA genes. Overall, our study contributes to the development of genetic testing protocols and genetic counseling for OCA in Pakistani families.
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Affiliation(s)
- Thomas J Jaworek
- Division of Pediatric Ophthalmology, Cincinnati Children's Hospital Research Foundation, Cincinnati, OH 45229, USA
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Kellett J, Emmanuel A, Rasool S. ECG dispersion mapping predicts clinical deterioration, measured by increase in the Simple Clinical Score. Acute Med 2012; 11:8-12. [PMID: 22423340] [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: 05/31/2023]
Abstract
OBJECTIVE ECG dispersion mapping (ECG-DM) is a novel technique that reports abnormal ECG microalternations. We report the ability of ECG-DM to predict clinical deterioration of acutely ill medical patients, as measured by an increase in the Simple Clinical Score (SCS) the day after admission to hospital. METHODS 453 acutely ill medical patients (mean age 69.7 +/- 14.0 years) had the SCS recorded and ECGDM performed immediately after admission to hospital. RESULTS 46 patients had an SCS increase 20.8 +/- 7.6 hours after admission. Abnormal micro-alternations during left ventricular re-polarization had the highest association with SCS increase (p=0.0005). Logistic regression showed that only nursing home residence and abnormal micro-alternations during re-polarization of the left ventricle were independent predictors of SCS increase with an odds ratio of 2.84 and 3.01, respectively. CONCLUSION ECG-DM changes during left ventricular re-polarization are independent predictors of clinical deterioration the day after hospital admission.
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Affiliation(s)
- J Kellett
- Department of Medicine, Nenagh Hospital, Nenagh, County Tipperary, Ireland.
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Shaheen F, Hakeem A, Singh M, Gojwari T, Shafi H, Wani M, Rasool S. Color Doppler findings of post-biopsy arteriovenous fistula in renal transplant. Indian J Nephrol 2010; 18:132-3. [PMID: 20142922 PMCID: PMC2813129 DOI: 10.4103/0971-4065.43696] [Citation(s) in RCA: 6] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Post biopsy arterio-venous fistula in renal transplant range in incidence from 15-16%. Spontaneous resolution of 75% A-V fistulas is seen within four weeks. We report a patient with post biopsy arterio-venous fistula who had developed unexplained hypertension with no definite feature of rejection on biopsy. Doppler application revealed an arterio-venous fistula which showed spontaneous resolution in six weeks.
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Affiliation(s)
- F Shaheen
- Department of Radio-Diagnosis, Medicine and Urology, SK Institute of Medical Sciences, Jammu and Kashmir - 190 011, India
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Abbas Z, Jafri W, Rasool S, Abid S, Hameed I. Mucormycosis in patients with complicated cirrhosis. Singapore Med J 2007; 48:69-73. [PMID: 17245519] [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: 05/13/2023]
Abstract
INTRODUCTION Rhino-orbito-cerebral mucormycosis is a rapidly progressive and fatal disease that mostly occurs in patients with diabetes mellitus and immunocompromised status. Antifungal therapy with surgical debridement is the standard of care. Patients with cirrhosis of liver are more prone to develop different infections. Many of these also show glucose intolerance or frank diabetes mellitus. Little is known about the clinical presentation and outcome of mucormycosis in patients with cirrhosis. Treatment is difficult due to underlying coagulopathy and hepatic dysfunction. METHODS Medical records of the past five years were searched for the cirrhotic patients admitted with associated diagnosis of mucormycosis or fungal infection. Six patients with mucormycosis were identified. RESULTS Out of six patients, five were male. Age range was 15-57 years. Cause of cirrhosis was hepatitis C in four patients, hepatitis B in one patient and autoimmune hepatitis in one patient. Two patients had hepatocellular carcinoma. Four patients had diabetes mellitus, of which one patient was also on steroids for the autoimmune liver disease. Four patients had spontaneous bacterial peritonitis at the time of admission. All six patients presented with rhino-orbitocerebral mucormycosis with nasal discharge and upper motor neuron signs. Diagnosis of mucormycosis was made by culture of biopsy and scrapings taken from the palate and nasal sinuses. These patients received amphotericin B. Four patients died while in the hospital, while two patients died within next few days after discharge. CONCLUSION Mucormycosis in cirrhosis is not very common and has a poor prognosis. Patients with advanced cirrhosis and diabetes mellitus are at risk of developing infection.
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Affiliation(s)
- Z Abbas
- Department of Medicine, The Aga Khan University Hospital, Stadium Road, Karachi 74800, Pakistan.
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Rasool S, Behari M, Jailkhani B, Irshad M. [P228]: Regional distribution of α‐bungarotoxin (α‐Bgtx) and β‐bungarotoxin (β‐Bgtx) binding activities in human cadaver brain. Int J Dev Neurosci 2006. [DOI: 10.1016/j.ijdevneu.2006.09.288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- S. Rasool
- All India Institute of Medical SciencesNew DelhiIndia
| | - M. Behari
- All India Institute of Medical SciencesNew DelhiIndia
| | - B. Jailkhani
- All India Institute of Medical SciencesNew DelhiIndia
| | - M. Irshad
- All India Institute of Medical SciencesNew DelhiIndia
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Javed AA, Shaharyar A, Shah IH, Shah MA, Ansari TN, Faheem M, Mehmood H, Khan MS, Afridi MA, Rasool S. Phase II study of gemcitabine concurrent with radiation in locally advanced squamous cell carcinoma of head and neck: Trial of the Cancer Research Group Pakistan. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.15520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
15520 Background: The optimum radiosensitizing dose and schedule of gemcitabine for squamous cell carcinoma of head and neck are not known. The objectives of this study were to evaluate the efficacy and toxicity of weekly gemcitabine as a radiosensitizer concurrent with radical radiotherapy in locally advanced head and neck cancer. Method: Thirty-nine patients with stage III or IV B inoperable carcinoma of head and neck were enrolled. Eligible patients had histopathologically confirmed squamous cell carcinoma with age between 18–70 years. Patients had a KPS >70 with an adequate marrow, hepatic and renal function. No prior chemotherapy or radiotherapy was allowed. Patients with nasopharyngeal, glottic or sub-glottic cancer were excluded. Gemcitabine 150 mg/m2 or a total dose not exceeding 200 mg was given on day 1,8,15,22,29, and 36 during radiation treatment. Gemcitabine was infused in 200 ml of normal saline in 2 hours and radiation was delivered two hours after the completion of gemcitabine infusion. Conventional fractionation was used to deliver a total dose of 66 Gy. CTC version 2.0 of NCI and RTOG/EORTC Late Radiation Morbidity Scoring Scheme were used for evaluation of toxicity and RECIST was used for response evaluation. Results: Only 35 patients were considered evaluable for response. Complete response was seen in 8 (22.9%) (95% CI; 10.4–40.1%), partial response in 25 (71.4%), with an overall response rate of 94.3% (95% CI; 80.8–99.3%). All the thirty-nine patients were evaluable for toxicity. Grade 3 and 4 mucositis was seen in 28 (71.8%) and 2 (5.1%) patients respectively. Grade 3 pharyngeal toxicity was seen in 6 (15.4%). One patient developed pharyngo-cutaneous fistula. Despite vigorous symptomatic and supportive care acute toxicities led to treatment interruption in 16 (41%) of patients. Conclusion: Weekly gemcitabine at a dose of 150mg/m2 concurrent with radiation therapy gives a high overall response rate and a high rate of acute toxicity. No significant financial relationships to disclose.
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Affiliation(s)
- A. A. Javed
- Nishter Medical College, Multan, Pakistan; King Edward Medical College, Lahore, Pakistan; Punjab Medical College, Faisalabad, Pakistan; Shaukat Khanum Hospital, Lahore,Pakistan, Pakistan; Combined Military Hospital, Rawalpindi, Pakistan; Nuclear Medicine & Radiotherapy Institution, Islamabad, Pakistan; Shifa International Hospital, Islamabad, Pakistan
| | - A. Shaharyar
- Nishter Medical College, Multan, Pakistan; King Edward Medical College, Lahore, Pakistan; Punjab Medical College, Faisalabad, Pakistan; Shaukat Khanum Hospital, Lahore,Pakistan, Pakistan; Combined Military Hospital, Rawalpindi, Pakistan; Nuclear Medicine & Radiotherapy Institution, Islamabad, Pakistan; Shifa International Hospital, Islamabad, Pakistan
| | - I. H. Shah
- Nishter Medical College, Multan, Pakistan; King Edward Medical College, Lahore, Pakistan; Punjab Medical College, Faisalabad, Pakistan; Shaukat Khanum Hospital, Lahore,Pakistan, Pakistan; Combined Military Hospital, Rawalpindi, Pakistan; Nuclear Medicine & Radiotherapy Institution, Islamabad, Pakistan; Shifa International Hospital, Islamabad, Pakistan
| | - M. A. Shah
- Nishter Medical College, Multan, Pakistan; King Edward Medical College, Lahore, Pakistan; Punjab Medical College, Faisalabad, Pakistan; Shaukat Khanum Hospital, Lahore,Pakistan, Pakistan; Combined Military Hospital, Rawalpindi, Pakistan; Nuclear Medicine & Radiotherapy Institution, Islamabad, Pakistan; Shifa International Hospital, Islamabad, Pakistan
| | - T. N. Ansari
- Nishter Medical College, Multan, Pakistan; King Edward Medical College, Lahore, Pakistan; Punjab Medical College, Faisalabad, Pakistan; Shaukat Khanum Hospital, Lahore,Pakistan, Pakistan; Combined Military Hospital, Rawalpindi, Pakistan; Nuclear Medicine & Radiotherapy Institution, Islamabad, Pakistan; Shifa International Hospital, Islamabad, Pakistan
| | - M. Faheem
- Nishter Medical College, Multan, Pakistan; King Edward Medical College, Lahore, Pakistan; Punjab Medical College, Faisalabad, Pakistan; Shaukat Khanum Hospital, Lahore,Pakistan, Pakistan; Combined Military Hospital, Rawalpindi, Pakistan; Nuclear Medicine & Radiotherapy Institution, Islamabad, Pakistan; Shifa International Hospital, Islamabad, Pakistan
| | - H. Mehmood
- Nishter Medical College, Multan, Pakistan; King Edward Medical College, Lahore, Pakistan; Punjab Medical College, Faisalabad, Pakistan; Shaukat Khanum Hospital, Lahore,Pakistan, Pakistan; Combined Military Hospital, Rawalpindi, Pakistan; Nuclear Medicine & Radiotherapy Institution, Islamabad, Pakistan; Shifa International Hospital, Islamabad, Pakistan
| | - M. S. Khan
- Nishter Medical College, Multan, Pakistan; King Edward Medical College, Lahore, Pakistan; Punjab Medical College, Faisalabad, Pakistan; Shaukat Khanum Hospital, Lahore,Pakistan, Pakistan; Combined Military Hospital, Rawalpindi, Pakistan; Nuclear Medicine & Radiotherapy Institution, Islamabad, Pakistan; Shifa International Hospital, Islamabad, Pakistan
| | - M. A. Afridi
- Nishter Medical College, Multan, Pakistan; King Edward Medical College, Lahore, Pakistan; Punjab Medical College, Faisalabad, Pakistan; Shaukat Khanum Hospital, Lahore,Pakistan, Pakistan; Combined Military Hospital, Rawalpindi, Pakistan; Nuclear Medicine & Radiotherapy Institution, Islamabad, Pakistan; Shifa International Hospital, Islamabad, Pakistan
| | - S. Rasool
- Nishter Medical College, Multan, Pakistan; King Edward Medical College, Lahore, Pakistan; Punjab Medical College, Faisalabad, Pakistan; Shaukat Khanum Hospital, Lahore,Pakistan, Pakistan; Combined Military Hospital, Rawalpindi, Pakistan; Nuclear Medicine & Radiotherapy Institution, Islamabad, Pakistan; Shifa International Hospital, Islamabad, Pakistan
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Rasool S, Siar CH, Ng KP. Oral candidal species among smokers and non-smokers. J Coll Physicians Surg Pak 2005; 15:679-82. [PMID: 16300700 DOI: 11.2005/jcpsp.679682] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/17/2005] [Accepted: 09/06/2005] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To determine the various oral Candidal species among healthy Malaysian adults. DESIGN Case-control study. PLACE AND DURATION OF STUDY This study was collaborated between the Department of Medical Microbiology, Faculty of Medicine and Department of Oral Pathology, Oral Medicine and Periodontology, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia, between September 2002 till January 2004. PATIENTS AND METHODS One hundred adults (50 smokers and 50 non-smokers), aged between 40 and 70 years were studied. Swabs and carbohydrate assimilation (Saboraud Dextrose Agar, Corn Meal Agar, API 20C AUX System) were performed. Specimens were collected from dorsum of the tongue, buccal mucosa and commissures (right and left each). Colony forms were established by positive colony forming units, on SDA medium (24-48 hours). Germ tube test for (true/pseudohyphae) growth was done on Corn Meal Agar Medium. Candida biotypes were evaluated by API 20C AUX system, which had a numerical 7 digit profile, added to evaluate a definite Candida species. RESULTS Thirty-five percent of Malaysian adults harbored Candida intraorally. Candidal species identified among 100 subjects had C. albicans (27) 77%, C. glabrata (3) 8%, C. famata, C. tropicalis, C. krusei, C. lusitaniae and C. guilliermondii (1) 3% each. Thirty-three positive cases comprised of 35 species i.e. two cases had two species each. Fifty seven percent of these were smokers and 43% non-smokers. These included 40% Chinese, 36% Malays and 24% Indians. Species were, however, not specified according to intra-oral sites i.e. buccal, commissural mucosa and dorsum of tongue. CONCLUSION On this series C. albicans is the most common species found in the oral cavity of Malaysian adults. It is equally frequent in smokers and non-smokers, but showed a predilection for the ethnic Chinese group.
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Affiliation(s)
- S Rasool
- Department of Oral Pathology, Altamash Institute of Dental Medicine, Karachi.
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Rasool S, Rehan M, Haq A, Alam MZ. Preparation and Nutritional Evaluation of Hatchery Waste Meal for Broilers. Asian Australas J Anim Sci 1999. [DOI: 10.5713/ajas.1999.554] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Rasool S, Gilani AH. Effect of ensiling sudax fodder with broiler litter and candida yest on the changes in pH, lactic acid and nitrogen fractions. Asian Australas J Anim Sci 1997. [DOI: 10.5713/ajas.1997.98] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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