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Sifeddine N, Elkhattabi L, Ait El Cadi C, Krami AM, Mounaji K, el khalfi B, Barakat A. Insights from the SNP analysis of TYMP gene linking MNGIE. Bioinformation 2024; 20:261-270. [PMID: 38712004 PMCID: PMC11069602 DOI: 10.6026/973206300200261] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 03/31/2024] [Accepted: 03/31/2024] [Indexed: 05/08/2024] Open
Abstract
TYMP gene, which codes for thymidine phosphorylase (TP) is also known as platelet-derived endothelial cell growth factor (PD-ECGF). TP plays crucial roles in nucleotide metabolism and angiogenesis. Mutations in the TYMP gene can lead to Mitochondrial Neurogastrointestinal Encephalopathy (MNGIE) syndrome, a rare genetic disorder. Our main objective was to evaluate the impact of detrimental non-synonymous single nucleotide polymorphisms (nsSNPs) on TP protein structure and predict harmful variants in untranslated regions (UTR). We employed a combination of predictive algorithms to identify nsSNPs with potential deleterious effects, followed by molecular modeling analysis to understand their effects on protein structure and function. Using 13 algorithms, we identified 119 potentially deleterious nsSNPs, with 82 located in highly conserved regions. Of these, 53 nsSNPs were functional and exposed, while 79 nsSNPs reduced TP protein stability. Further analysis of 18 nsSNPs through 3D protein structure analysis revealed alterations in amino acid interactions, indicating their potential impact on protein function. This will help in the development of faster and more efficient genetic tests for detecting TYMP gene mutations.
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Affiliation(s)
- Najat Sifeddine
- Laboratory of Genomics and Human Genetics, Institut Pasteur du Maroc, Casablanca, Morocco
- Laboratory of Physiology and Molecular Genetics, Department of Biology, Faculty of Sciences Ain Chock, Hassan II University of Casablanca, Casablanca, Morocco
| | - Lamiae Elkhattabi
- Laboratory of Genomics and Human Genetics, Institut Pasteur du Maroc, Casablanca, Morocco
| | - Chaimaa Ait El Cadi
- Laboratory of Genomics and Human Genetics, Institut Pasteur du Maroc, Casablanca, Morocco
| | - Al Mehdi Krami
- Laboratory of Genomics and Human Genetics, Institut Pasteur du Maroc, Casablanca, Morocco
| | - Khadija Mounaji
- Laboratory of Physiology and Molecular Genetics, Department of Biology, Faculty of Sciences Ain Chock, Hassan II University of Casablanca, Casablanca, Morocco
| | - Bouchra el khalfi
- Laboratory of Physiology and Molecular Genetics, Department of Biology, Faculty of Sciences Ain Chock, Hassan II University of Casablanca, Casablanca, Morocco
| | - Abdelhamid Barakat
- Laboratory of Genomics and Human Genetics, Institut Pasteur du Maroc, Casablanca, Morocco
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Darkaoui B, Lafnoune A, Chgoury F, Daoudi K, Chakir S, Mounaji K, Karkouri M, Cadi R, Naoual O. Induced pathophysiological alterations by the venoms of the most dangerous Moroccan scorpions Androctonus mauretanicus and Buthus occitanus: A comparative pathophysiological and toxic-symptoms study. Hum Exp Toxicol 2022; 41:9603271211072872. [PMID: 35130762 DOI: 10.1177/09603271211072872] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 11/15/2022]
Abstract
Scorpion envenomation is a serious public health issue. Androctonus mauretanicus (Am) and Buthus occitanus (Bo) are the most dangerous scorpions in Morocco. Despite their medical relevance, no study has yet related their kinetics of symptom apparition and the consequent tissue disorders at the same interval post-injection. This work achieved the first comparative pathophysiological and toxic-symptoms study between the Am and Bo venoms from a biochemical, toxicological and physiopathological standpoint. The activity of venoms and their subletal dose were determined by administration of increasing concentrations of the venoms. 30, 60 and 120 min following the experimental envenomation in mice, the profile of clinical symptoms was underlined and the main organs: brain, heart, lungs, liver and kidneys were removed for histological examination. The Am venom is a rich source of proteins and three-times more toxic than the Bo. The most observed clinical symptoms are neurological and cardiopulmonary. The Am venom caused histopathological alterations at 30, 60, and 120 min which were more important than the Bo. This study highlighted that both venoms exhibited a strong toxicity with variable intensities. Moreover, we showed the presence of correlation between the level of histopathological disorders observed and the intensity of signs appeared at the same time following venom inoculation.
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Affiliation(s)
- Bouchra Darkaoui
- Laboratory of Venoms and Toxins, Pasteur Institute of Morocco, Casablanca, Morocco.,Laboratory of Molecular Genetics, Physiopathology and Biotechnology, Faculty of Sciences Ain Chock, Hassan II University of Casablanca, Casablanca, Morocco
| | - Ayoub Lafnoune
- Laboratory of Venoms and Toxins, Pasteur Institute of Morocco, Casablanca, Morocco.,Laboratory of Molecular Genetics, Physiopathology and Biotechnology, Faculty of Sciences Ain Chock, Hassan II University of Casablanca, Casablanca, Morocco
| | - Fatima Chgoury
- Laboratory of Venoms and Toxins, Pasteur Institute of Morocco, Casablanca, Morocco
| | - Khadija Daoudi
- Laboratory of Venoms and Toxins, Pasteur Institute of Morocco, Casablanca, Morocco.,Laboratory of Molecular Genetics, Physiopathology and Biotechnology, Faculty of Sciences Ain Chock, Hassan II University of Casablanca, Casablanca, Morocco
| | - Salma Chakir
- Laboratory of Venoms and Toxins, Pasteur Institute of Morocco, Casablanca, Morocco
| | - Khadija Mounaji
- Laboratory of Molecular Genetics, Physiopathology and Biotechnology, Faculty of Sciences Ain Chock, Hassan II University of Casablanca, Casablanca, Morocco
| | - Mehdi Karkouri
- Department of Anatomical Pathology, 107900University Hospital of Ibn Rochd, Casablanca, Morocco
| | - Rachida Cadi
- Laboratory of Molecular Genetics, Physiopathology and Biotechnology, Faculty of Sciences Ain Chock, Hassan II University of Casablanca, Casablanca, Morocco
| | - Oukkache Naoual
- Laboratory of Venoms and Toxins, Pasteur Institute of Morocco, Casablanca, Morocco
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Lafnoune A, Lee SY, Heo JY, Gourja I, Darkaoui B, Abdelkafi-Koubaa Z, Chgoury F, Daoudi K, Chakir S, Cadi R, Mounaji K, Srairi-Abid N, Marrakchi N, Shum D, Seo HR, Oukkache N. Anti-Cancer Effect of Moroccan Cobra Naja haje Venom and Its Fractions against Hepatocellular Carcinoma in 3D Cell Culture. Toxins (Basel) 2021; 13:toxins13060402. [PMID: 34199838 PMCID: PMC8229680 DOI: 10.3390/toxins13060402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 05/17/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 12/02/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the most common primary liver cancer in adults, the fifth most common malignancy worldwide and the third leading cause of cancer related death. An alternative to the surgical treatments and drugs, such as sorafenib, commonly used in medicine is necessary to overcome this public health problem. In this study, we determine the anticancer effect on HCC of Moroccan cobra Naja haje venom and its fraction obtained by gel filtration chromatography against Huh7.5 cancer cell line. Cells were grown together with WI38 human fibroblast cells, LX2 human hepatic stellate cell line, and human endothelial cells (HUVEC) in MCTS (multi-cellular tumor spheroids) models. The hepatotoxicity of venom and its fractions were also evaluated using the normal hepatocytes cell line (Fa2N-4 cells). Our results showed that an anti HCC activity of Moroccan cobra Naja haje venom and, more specifically, the F7 fraction of gel filtration chromatography exhibited the greatest anti-hepatocellular carcinoma effect by decreasing the size of MCTS. This effect is associated with a low toxicity against normal hepatocytes. These results strongly suggest that the F7 fraction of Moroccan cobra Naja haje venom obtained by gel filtration chromatography possesses the ability to inhibit cancer cells proliferation. More research is needed to identify the specific molecule(s) responsible for the anticancer effect and investigate their mechanism of action.
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Affiliation(s)
- Ayoub Lafnoune
- Laboratoire des Venins et Toxines, Département de Recherche, Institut Pasteur du Maroc, 1, Place Louis Pasteur, Casablanca 20360, Morocco; (A.L.); (I.G.); (B.D.); (F.C.); (K.D.); (S.C.)
- Laboratoire Physiopathologie, Génétique Moléculaire & Biotechnologie, Faculté des Sciences Ain-Chock, Hassan II University of Casablanca, B.P 5366 Maarif, Casablanca 20000, Morocco; (R.C.); (K.M.)
| | - Su-Yeon Lee
- Cancer Biology Research Laboratory, Institut Pasteur Korea, 16, Daewangpangyo-ro 712 beon-gil Bundang-gu, Seong-nam-si 13488, Gyeonggi-do, Korea; (S.-Y.L.); (H.-R.S.)
| | - Jin-Yeong Heo
- Screening Discovery Platform, Institut Pasteur Korea, 16, Daewangpangyo-ro 712 beon-gil Bundang-gu, Seong-nam-si 13488, Gyeonggi-do, Korea; (J.-Y.H.); (D.S.)
| | - Imane Gourja
- Laboratoire des Venins et Toxines, Département de Recherche, Institut Pasteur du Maroc, 1, Place Louis Pasteur, Casablanca 20360, Morocco; (A.L.); (I.G.); (B.D.); (F.C.); (K.D.); (S.C.)
| | - Bouchra Darkaoui
- Laboratoire des Venins et Toxines, Département de Recherche, Institut Pasteur du Maroc, 1, Place Louis Pasteur, Casablanca 20360, Morocco; (A.L.); (I.G.); (B.D.); (F.C.); (K.D.); (S.C.)
- Laboratoire Physiopathologie, Génétique Moléculaire & Biotechnologie, Faculté des Sciences Ain-Chock, Hassan II University of Casablanca, B.P 5366 Maarif, Casablanca 20000, Morocco; (R.C.); (K.M.)
| | - Zaineb Abdelkafi-Koubaa
- Laboratoire des Venins et Biomolécules Thérapeutiques LR11IPT08, Institut Pasteur de Tunis, 13, Place Pasteur, Tunis 1002, Tunisia; (Z.A.-K.); (N.S.-A.); (N.M.)
| | - Fatima Chgoury
- Laboratoire des Venins et Toxines, Département de Recherche, Institut Pasteur du Maroc, 1, Place Louis Pasteur, Casablanca 20360, Morocco; (A.L.); (I.G.); (B.D.); (F.C.); (K.D.); (S.C.)
| | - Khadija Daoudi
- Laboratoire des Venins et Toxines, Département de Recherche, Institut Pasteur du Maroc, 1, Place Louis Pasteur, Casablanca 20360, Morocco; (A.L.); (I.G.); (B.D.); (F.C.); (K.D.); (S.C.)
- Laboratoire Physiopathologie, Génétique Moléculaire & Biotechnologie, Faculté des Sciences Ain-Chock, Hassan II University of Casablanca, B.P 5366 Maarif, Casablanca 20000, Morocco; (R.C.); (K.M.)
| | - Salma Chakir
- Laboratoire des Venins et Toxines, Département de Recherche, Institut Pasteur du Maroc, 1, Place Louis Pasteur, Casablanca 20360, Morocco; (A.L.); (I.G.); (B.D.); (F.C.); (K.D.); (S.C.)
| | - Rachida Cadi
- Laboratoire Physiopathologie, Génétique Moléculaire & Biotechnologie, Faculté des Sciences Ain-Chock, Hassan II University of Casablanca, B.P 5366 Maarif, Casablanca 20000, Morocco; (R.C.); (K.M.)
| | - Khadija Mounaji
- Laboratoire Physiopathologie, Génétique Moléculaire & Biotechnologie, Faculté des Sciences Ain-Chock, Hassan II University of Casablanca, B.P 5366 Maarif, Casablanca 20000, Morocco; (R.C.); (K.M.)
| | - Najet Srairi-Abid
- Laboratoire des Venins et Biomolécules Thérapeutiques LR11IPT08, Institut Pasteur de Tunis, 13, Place Pasteur, Tunis 1002, Tunisia; (Z.A.-K.); (N.S.-A.); (N.M.)
| | - Naziha Marrakchi
- Laboratoire des Venins et Biomolécules Thérapeutiques LR11IPT08, Institut Pasteur de Tunis, 13, Place Pasteur, Tunis 1002, Tunisia; (Z.A.-K.); (N.S.-A.); (N.M.)
| | - David Shum
- Screening Discovery Platform, Institut Pasteur Korea, 16, Daewangpangyo-ro 712 beon-gil Bundang-gu, Seong-nam-si 13488, Gyeonggi-do, Korea; (J.-Y.H.); (D.S.)
| | - Haeng-Ran Seo
- Cancer Biology Research Laboratory, Institut Pasteur Korea, 16, Daewangpangyo-ro 712 beon-gil Bundang-gu, Seong-nam-si 13488, Gyeonggi-do, Korea; (S.-Y.L.); (H.-R.S.)
| | - Naoual Oukkache
- Laboratoire des Venins et Toxines, Département de Recherche, Institut Pasteur du Maroc, 1, Place Louis Pasteur, Casablanca 20360, Morocco; (A.L.); (I.G.); (B.D.); (F.C.); (K.D.); (S.C.)
- Correspondence:
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Fatene N, Mansouri S, Elkhalfi B, Berrada M, Mounaji K, Soukri A. Assessment of the electrochemical behaviour of Nickel-Titanium-based orthodontic wires: Effect of some natural corrosion inhibitors in comparison with fluoride. J Clin Exp Dent 2019; 11:e414-e420. [PMID: 31275513 PMCID: PMC6599693 DOI: 10.4317/jced.55601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 03/06/2019] [Indexed: 11/16/2022] Open
Abstract
Background The aim of this study is to assess the corrosion resistance behaviour of Nickel-Titanium-based orthodontic wires (NiTi) in different concentrations of Sodium Fluoride (NaF) and the corrosion’s inhibitory effect of the extracts of some medicinal plants (essential oils, hydrosols and extract). Material and Methods In this study we used NiTi (3M) and CuNiTi (ORMCO, 35°C, California) orthodontic wires. The following electrolytes were prepared: Lactate Ringer solution with additions of 0.1%, 0.5% or 1% of Sodium Fluoride and the extracts of different plants: Artemisia, Syzygium aromaticum (Clove) and Celtis australis. Corrosion resistance was studied using anodic potentiodynamic polarisation and electrochemical impedance spectroscopy measurements. At the end of the experiment, microscopic images of wires were performed. ANOVA test with the comparison of Bonferroni and Tukey tests were performed to elucidate comparisons among all groups. Results The higher sodium fluoride concentration is related to negative corrosion potential for both NiTi and CuNiTi orthodontic wire. Hydrosols are associated to positive values of corrosion potential. CuNiTi has a lower corrosion resistance than NiTi. Conclusions The prescription of toothpastes containing sodium fluoride should be reduced especially for patients wearing fixed orthodontic appliances. Eugenol may be considered as alternative of sodium fluoride for orthodontic patients for its anti-microbial and anti-corrosive effects. Key words:Corrosion behaviour, Sodium Fluoride, Nickel-Tatanium, orthodontic wires, corrosion inhibitors, aromatical plants.
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Tmimi FZ, Faraj C, Bkhache M, Mounaji K, Failloux AB, Sarih M. Insecticide resistance and target site mutations (G119S ace-1 and L1014F kdr) of Culex pipiens in Morocco. Parasit Vectors 2018; 11:51. [PMID: 29357900 PMCID: PMC5778619 DOI: 10.1186/s13071-018-2625-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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: 03/29/2017] [Accepted: 01/08/2018] [Indexed: 12/30/2022] Open
Abstract
Background Control of the mosquito vector Culex pipiens with insecticides is the main way to control arboviruses that the species can transmit such as West Nile virus (WNV) and Rift Valley fever virus (RVFV). However, its efficiency has been hampered by the emergence of insecticide resistance. Little is known about the insecticide-resistance status and underlying resistance mechanisms of field-collected populations of Cx. pipiens in Morocco. Methods Mosquito adults from Mohammadia city in Morocco were reared from immature stages. The level of their susceptibility to insecticides was assessed using standard WHO bioassay. The two forms of the Cx. pipiens complex and their hybrids were identified by a multiplex PCR. Identified mosquitoes were then tested for the presence of the G119S ace-1 and L1014F kdr mutations using PCR-RFLP and PCR assays, respectively. Results WHO bioassays indicated that Cx. pipiens was resistant to all tested insecticides: lambda-cyhalothrin (49% mortality), permethrin (63% mortality), DDT (16% mortality), malation (52% mortality) and bendiocarb (39% mortality). The frequency of the 119S allele was almost identical in the pipiens form and hybrids (0.11 and 0.15, respectively) whereas it remained low in the molestus form (0.03). No significant correlation was observed between the G119S allele and the resistance phenotype to two tested insecticides (malathion and bendiocarb). The frequency of the L1014F allele was identical in the pipiens form and hybrids (0.44) whereas it was low in the molestus form (0.36) but no significant difference was detected (χ2 = 1.46, df = 1, P = 0.225). The presence of the L1014F kdr mutation was significantly associated with resistance to three tested insecticides in pipiens form (P = 0.0019, P = 0.0023 and P = 0.023, respectively, to lambda-cyhalothrin, permethrin and DDT) whereas no significant correlation was observed between the L1014F kdr mutation and resistance phenotype in molestus form and hybrids to the three tested insecticides. Conclusion These findings showed that wild populations of Cx. pipiens have developed resistance against the main insecticide families with different modes of action: organochlorines (DDT), organophosphates (malathion), carbamates (bendiocarb), pyrethroids (lambda-cyhalothrin, permethrin). Therefore, urgent action should be taken to manage the resistance in this species to maintain the effectiveness of arbovirus control.
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Affiliation(s)
- Fatim-Zohra Tmimi
- Institut Pasteur du Maroc, Service de Parasitologie et des Maladies Vectorielles, Place Louis Pasteur, 20360, Casablanca, Morocco.,Faculté des Sciences Ain-Chock, Laboratoire de Physiopathologie, Génétique Moléculaire et Biotechnologie, Casablanca, Morocco
| | - Chafika Faraj
- Institut National d'Hygiène, Laboratoire d'Entomologie Médicale, Rabat, Morocco
| | - Meriem Bkhache
- Institut Pasteur du Maroc, Service de Parasitologie et des Maladies Vectorielles, Place Louis Pasteur, 20360, Casablanca, Morocco
| | - Khadija Mounaji
- Faculté des Sciences Ain-Chock, Laboratoire de Physiopathologie, Génétique Moléculaire et Biotechnologie, Casablanca, Morocco
| | - Anna-Bella Failloux
- Institut Pasteur, Department of Virology, Arboviruses and Insect Vectors, 25-28 rue du Docteur Roux, 75724, Paris, France
| | - M'hammed Sarih
- Institut Pasteur du Maroc, Service de Parasitologie et des Maladies Vectorielles, Place Louis Pasteur, 20360, Casablanca, Morocco.
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Tmimi FZ, Bkhache M, Mounaji K, Failloux AB, Sarih M. First report of the endobacteria Wolbachia in natural populations of Culex pipiens in Morocco. J Vector Ecol 2017; 42:349-351. [PMID: 29125253 DOI: 10.1111/jvec.12275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- F Z Tmimi
- Institut Pasteur du Maroc, Service de Parasitologie et des Maladies Vectorielles, Place Louis Pasteur, Casablanca 20360, Morocco
- Faculté des Sciences Aïn Chock, Laboratoire de Physiopathologie, Biologie Moléculaire et Biotechnologie, Université Hassan II de Casablanca, Morocco
| | - M Bkhache
- Institut Pasteur du Maroc, Service de Parasitologie et des Maladies Vectorielles, Place Louis Pasteur, Casablanca 20360, Morocco
| | - K Mounaji
- Faculté des Sciences Aïn Chock, Laboratoire de Physiopathologie, Biologie Moléculaire et Biotechnologie, Université Hassan II de Casablanca, Morocco
| | - A B Failloux
- Institut Pasteur, Department of Virology, Arboviruses and Insect Vectors, 25-28 rue du Docteur Roux, Paris 75724, France
| | - M Sarih
- Institut Pasteur du Maroc, Service de Parasitologie et des Maladies Vectorielles, Place Louis Pasteur, Casablanca 20360, Morocco
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Abstract
The characterization of metallothionein in the Urodele amphibian species Pleurodeles waltl was achieved. A simple and rapid method for identification of metallothionein, based on its strong affinity for cadmium (109Cd), was used. We were able to show that metallothionein is constitutively synthesized in liver, ovary and brain. The property of metallothionein to strongly bind essential (Zn, Cu) as well as toxic (Cd, Hg) metals is consistent with a dual role in cellular metabolism, i.e. homeostatis and detoxification of heavy metal ions.
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Affiliation(s)
- Khadija Mounaji
- Laboratoire de Biologie et Physiologie de la Reproduction et du Développement, Faculté des Sciences I, Maarif, Casablanca, Morocco
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Mountassif D, Kabine M, Mounchid K, Mounaji K, Latruffe N, El Kebbaj MS. Sensitivity of liver metabolism in jerboa (Jaculus orientalis) to ciprofibrate, a peroxisome proliferator. Mol Med Rep 2009; 2:597-602. [PMID: 21475872 DOI: 10.3892/mmr_00000143] [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: 11/05/2022] Open
Abstract
Ciprofibrate is a well-known drug used to normalize lipid parameters and fibrinogen in atherosclerosis patients. In laboratory rodents such as rats or mice, ciprofibrate exhibits peroxisome proliferator activity. However, to date, no clear alterations or side effects caused by ciprofibrate have been noted in humans. In order to further investigate such possible relationships, we studied the effects of sustained ciprofibrate treatment in jerboas (Jaculus orientalis). In these rodents, ciprofibrate does not induce hepatomegaly or promote liver cell DNA replication, confirming that this species more closely resembles humans than do rats or mice. The jerboas were treated daily with ciprofibrate at 3 mg/kg body weight for 4 weeks. Subcellular markers, clinical enzymes and enzymatic antioxidant defenses were then assessed. The results showed a strong decrease in peroxisomal catalase activity and an increase in the level of malondialdehyde (a stress biomarker). Moreover, ciprofibrate in vivo and in vitro inhibited D-3-hydroxybutyrate dehydrogenase, a mitochondrial enzyme of the ketone body interconversion that is important in redox balance (NAD+/NADH+H+ ratio). In conclusion, under these conditions, ciprofibrate induced alterations in the liver oxidative metabolism.
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Affiliation(s)
- Driss Mountassif
- INSERM U 866; Université de Bourgogne, Laboratoire de Biochimie Métabolique et Nutritionnelle, Faculté des Sciences, 21000 Dijon cedex, France
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Mounaji K, Vlassi M, Erraiss NE, Wegnez M, Serrano A, Soukri A. In vitro effect of metal ions on the activity of two amphibian glyceraldehyde-3-phosphate dehydrogenases: potential metal binding sites. Comp Biochem Physiol B Biochem Mol Biol 2003; 135:241-54. [PMID: 12798935 DOI: 10.1016/s1096-4959(03)00051-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Glyceraldehyde-3-phosphate dehydrogenase (GAPDH, EC 1.2.1.12) was purified from two amphibian species, Xenopus laevis and Pleurodeles waltl. Comparative studies revealed that the two proteins differ by their subunit molecular masses, pI values and V8 digested peptide maps. The effect of zinc, cadmium and copper ions on GAPDH enzymatic activity has been examined in vitro. A time, metal concentration and metal type dependent inhibition was observed for both enzymes. X. laevis and P. waltl GAPDHs exhibit a much greater sensitivity to copper than to cadmium or zinc ions. Different half-lives and differential sensitivity to various metals was observed between the two enzymes with P. waltl GAPDH being remarkably tolerant to cadmium ions compared to the X. laevis enzyme. In order to understand the differential sensitivity of the two enzymes to metals, we produced 3D models of both X. laevis and P. waltl GAPDH structures based upon known 3D structures of GAPDHs from other species. This necessitated, in a first step, to clone a 900 bp cDNA fragment encoding the nearly full-length P. waltl GAPDH. Spatial motif searches on the homology models indicated potential metal binding sites involving cysteine and histidine residues outside the catalytic sites, existing only in either the X. laevis or the P. waltl GAPDH sequences.
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Affiliation(s)
- Khadija Mounaji
- Laboratoire de Biologie et Physiologie de la Reproduction et du Développement, Faculté des Sciences I, BP. 5366, Maarif, Casablanca, Morocco
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Mounaji K, Erraiss NE, Iddar A, Wegnez M, Serrano A, Soukri A. Glyceraldehyde-3-phosphate dehydrogenase from the newt Pleurodeles waltl. Protein purification and characterization of a GapC gene. Comp Biochem Physiol B Biochem Mol Biol 2002; 131:411-21. [PMID: 11959023 DOI: 10.1016/s1096-4959(01)00518-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The NAD(+)-dependent cytosolic glyceraldehyde-3-phosphate dehydrogenase (GAPDH, EC 1.2.1.12) has been purified to homogeneity from skeletal muscle of the newt Pleurodeles waltl (Amphibia, Urodela). The purification procedure including ammonium sulfate fractionation followed by Blue Sepharose CL-6B chromatography resulted in a 24-fold increase in specific activity and a final yield of approximately 46%. The native protein exhibited an apparent molecular weight of approximately 146 kDa with absolute specificity for NAD(+). Only one GAPDH isoform (pI 7.57) was obtained by chromatofocusing. The enzyme is an homotetrameric protein composed of identical subunits with an apparent molecular weight of approximately 37 kDa. Monospecific polyclonal antibodies raised in rabbits against the purified newt GAPDH immunostained a single 37-kDa GAPDH band in extracts from different tissues blotted onto nitrocellulose. A 510-bp cDNA fragment that corresponds to an internal region of a GapC gene was obtained by RT-PCR amplification using degenerate primers. The deduced amino acid sequence has been used to establish the phylogenetic relationships of the Pleurodeles enzyme--the first GAPDH from an amphibian of the Caudata group studied so far--with other GAPDHs of major vertebrate phyla.
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Affiliation(s)
- Khadija Mounaji
- Laboratoire de Biologie et Physiologie de la Reproduction et du Développement, Faculté des Sciences I, BP5366, Maarif, Casablanca, Morocco
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Bulli�re D, Bulli�re F, Mounaji K, Reggi M, Gharib B. Positional cell surface antigens in an insect appendage. ACTA ACUST UNITED AC 1982; 191:222-227. [DOI: 10.1007/bf00848408] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/1982] [Accepted: 06/05/1982] [Indexed: 11/29/2022]
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