1
|
Azzouz A, Hanini A, Bouslama Z, Saili L, Benaceur S, Sakly M, Tliba S, Abdelmelek H. Iron prevents demyelination of frog sciatic nerves. Environ Toxicol Pharmacol 2017; 55:51-54. [PMID: 28823653 DOI: 10.1016/j.etap.2017.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 08/04/2017] [Accepted: 08/08/2017] [Indexed: 06/07/2023]
Abstract
Metal ions are of particular importance in nervous system function, notably iron. However, very little has been done to investigate its physiological role in frog peripheral nervous system. The present research aim to evaluate i) the time-effect of sciatic nerve ligation and/or ii) iron sulphate (1.50mg/kg, in lymphatic sac) on frog myelin sheaths. Histological sections following ligation shows degeneration of some fibres with axonal and myelin breakdown associated to a decrease of Schwann cells number following 2h (45.00±0.30, p<0.0001), 24h (28.00±0.020, p<0.0001). Interestingly, iron administration reduces the degeneration of myelin sheaths classically observed in frog ligated sciatic nerve associated with an increase of Schwann cells number (139.00±0.50, p<0.0001). Thus, iron could prevent degeneration or promote regeneration induced by ligation in frog sciatic nerve.
Collapse
Affiliation(s)
- Amina Azzouz
- Laboratoire d'Ecologie des Systèmes Terrestres et Aquatiques, Faculté des Sciences, Université Badji Mokhtar, BP 12, 23000 Sidi Amar, Annaba, Algeria.
| | - Amel Hanini
- Laboratoire de Physiologie Intégrée, Faculté des Sciences, Université de Carthage, Jarzouna, Bizerte 7021, Tunisia
| | - Zihad Bouslama
- Laboratoire d'Ecologie des Systèmes Terrestres et Aquatiques, Faculté des Sciences, Université Badji Mokhtar, BP 12, 23000 Sidi Amar, Annaba, Algeria
| | - Linda Saili
- Laboratoire d'Ecologie des Systèmes Terrestres et Aquatiques, Faculté des Sciences, Université Badji Mokhtar, BP 12, 23000 Sidi Amar, Annaba, Algeria
| | - Sihem Benaceur
- Laboratoire de Physiologie Intégrée, Faculté des Sciences, Université de Carthage, Jarzouna, Bizerte 7021, Tunisia
| | - Mohsen Sakly
- Laboratoire de Physiologie Intégrée, Faculté des Sciences, Université de Carthage, Jarzouna, Bizerte 7021, Tunisia
| | - Souhil Tliba
- Laboratoire de Génie Biologique des Cancers, Faculté de Médecine, Université Abderrahmane Mira, Aboudaou, Bejaia 06000, Algeria
| | - Hafedh Abdelmelek
- Laboratoire de Physiologie Intégrée, Faculté des Sciences, Université de Carthage, Jarzouna, Bizerte 7021, Tunisia
| |
Collapse
|
2
|
Saili L, Hanini A, Smirani C, Azzouz I, Azzouz A, Sakly M, Abdelmelek H, Bouslama Z. Effects of acute exposure to WIFI signals (2.45GHz) on heart variability and blood pressure in Albinos rabbit. Environ Toxicol Pharmacol 2015; 40:600-605. [PMID: 26356390 DOI: 10.1016/j.etap.2015.08.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 08/08/2015] [Accepted: 08/13/2015] [Indexed: 06/05/2023]
Abstract
Electrocardiogram and arterial pressure measurements were studied under acute exposures to WIFI (2.45GHz) during one hour in adult male rabbits. Antennas of WIFI were placed at 25cm at the right side near the heart. Acute exposure of rabbits to WIFI increased heart frequency (+22%) and arterial blood pressure (+14%). Moreover, analysis of ECG revealed that WIFI induced a combined increase of PR and QT intervals. By contrast, the same exposure failed to alter maximum amplitude and P waves. After intravenously injection of dopamine (0.50ml/kg) and epinephrine (0.50ml/kg) under acute exposure to RF we found that, WIFI alter catecholamines (dopamine, epinephrine) action on heart variability and blood pressure compared to control. These results suggest for the first time, as far as we know, that exposure to WIFI affect heart rhythm, blood pressure, and catecholamines efficacy on cardiovascular system; indicating that radiofrequency can act directly and/or indirectly on cardiovascular system.
Collapse
Affiliation(s)
- Linda Saili
- Laboratoire d'Ecologie des Systèmes Terrestres et Aquatiques, Faculté des Sciences, Université Badji Mokhtar, BP 12, 23005 Sidi Amar, Annaba, Algérie.
| | - Amel Hanini
- Laboratoire de Physiologie Intégrée, Faculté des Sciences, Université de Carthage, Jarzouna, Bizerte 7021, Tunisie
| | - Chiraz Smirani
- Laboratoire de Physiologie Intégrée, Faculté des Sciences, Université de Carthage, Jarzouna, Bizerte 7021, Tunisie
| | - Ines Azzouz
- Laboratoire de Physiologie Intégrée, Faculté des Sciences, Université de Carthage, Jarzouna, Bizerte 7021, Tunisie
| | - Amina Azzouz
- Laboratoire d'Ecologie des Systèmes Terrestres et Aquatiques, Faculté des Sciences, Université Badji Mokhtar, BP 12, 23005 Sidi Amar, Annaba, Algérie
| | - Mohsen Sakly
- Laboratoire de Physiologie Intégrée, Faculté des Sciences, Université de Carthage, Jarzouna, Bizerte 7021, Tunisie
| | - Hafedh Abdelmelek
- Laboratoire de Physiologie Intégrée, Faculté des Sciences, Université de Carthage, Jarzouna, Bizerte 7021, Tunisie
| | - Zihad Bouslama
- Laboratoire d'Ecologie des Systèmes Terrestres et Aquatiques, Faculté des Sciences, Université Badji Mokhtar, BP 12, 23005 Sidi Amar, Annaba, Algérie
| |
Collapse
|