Publications

2022
Salah I, Adjroud O, Elwej A. Protective Effects of Selenium and Zinc Against Nickel Chloride-Induced Hormonal Changes and Oxidative Damage in Thyroid of Pregnant Rats. Biological Trace Element Research [Internet]. 2022;200 (5) :2183-2194. Publisher's VersionAbstract

Nickel chloride (NiCl2) is a heavy metal that may affect the function of the thyroid. Selenium (Se) and zinc (Zn) are essential trace elements involved in thyroid hormone metabolism. However, little is reported about thyrotoxicity during gestation. The current study aimed to investigate the protective effects of selenium and zinc against NiCl2-induced thyrotoxicity in pregnant Wistar rats. Female rats were treated subcutaneously (s.c.) on the 3rd day of pregnancy, with NaCl 0.9% and served as control, NiCl2 (100 mg/kg body weight (BW)) alone, or in association with Se (0.3 mg/kg, s.c.), ZnCl2 (20 mg/kg, s.c.), or both of them simultaneously. Oxidative stress parameters, thyroid biomarkers, and histopathological examination were evaluated. Results showed that NiCl2 exposure caused a significant decrease in maternal body weight and an increase in absolute and relative thyroid weight compared to the controls. NiCl2 administration also led to decreased plasma triiodothyronine (T3) and thyroxine (T4) with a concomitant significant increase in thyroid-stimulating hormone (TSH) levels when compared to that of control. In addition, an overall pro-oxidant effect was associated with a decrease in the reduced glutathione (GSH) and nonprotein thiol (NPSH) contents and the enzymatic activity of glutathione peroxidase (GPx) and superoxide dismutase (SOD), and an increase in malondialdehyde (MDA). These biochemical disturbances were confirmed by histological changes. However, the co-treatment of Se and/or ZnCl2 attenuates NiCl2-induced changes. Our findings suggested that Se and ZnCl2 ameliorated NiCl2-induced thyrotoxicity in pregnant Wistar rats by exhibiting antioxidant effects.

Fedala A, Adjroud O, Bennoune O, Abid-Essefi S, Foughalia A, Timoumi R. Nephroprotective Efficacy of Selenium and Zinc Against Potassium Dichromate-Induced Renal Toxicity in Pregnant Wistar Albino Rats. Biological Trace Element Research [Internet]. 2022;200 (11) :4782-4794. Publisher's VersionAbstract

Hexavalent chromium (CrVI) compounds are potent toxicants commonly used in numerous industries. Thus, potential toxic effects and health hazards are of high relevance. Selenium (Se) and zinc (Zn) are known for their antioxidant and chemoprotective properties. However, little is known about their protective effects against CrVI-induced renal damage during pregnancy. In this context, the present study aimed to investigate the protective efficacy of these two essential elements against potassium dichromate-induced nephrotoxicity in pregnant Wistar Albino rats. Female rats were divided into control and four treated groups of six each receiving subcutaneously on the 3rd day of pregnancy, K2Cr2O7 (10 mg/kg, s.c. single dose) alone, or in association with Se (0.3 mg/kg, s.c. single dose), ZnCl2 (20 mg/kg, s.c. single dose) or both of them simultaneously. The nephrotoxic effects were monitored by the evaluation of plasma renal parameters, oxidative stress biomarkers, DNA damage, and renal Cr content. The obtained results showed that K2Cr2O7 disturbed renal biochemical markers, induced oxidative stress and DNA fragmentation in kidney tissues, and altered renal histoarchitecture. The co-administration of Se and/or ZnCl2 has exhibited pronounced chelative, antioxidant, and genoprotective effects against K2Cr2O7-induced renal damage and attenuated partially the histopathological alterations. These results suggest that Se and Zn can be used as efficient nephroprotective agents against K2Cr2O7-induced toxicity in pregnant Wistar Albino rats.

2021
Sengouga D, Adjroud O, Salah I, Fedala A. CHROMIUM TOXICITY ON THE ELECTROLYTE BALANCE AND ADRENAL HISTOLOGY IN WISTAR MALE RATS.  Nutr.Santé. 2021;10 (1).
Fedala A, OUNASSA ADJROUD, Saouli A, Imane S. ZINC ALLEVIATES POTASSIUM DICHROMATE-INDUCED HEPATOTOXICITY IN PREGNANT WISTAR RATS. Malaysian Journal Of Biochemistry & Molecular Biology . 2021;2 :10-16 .Abstract

The present study aimed to investigate the potential protective effects of zinc (Zn) against hexavalent chromium-induced hepatotoxicity in pregnant Wistar rats. Female rats were treated subcutaneously (s.c) on the 3 rd day of pregnancy, with NaCl 0.9 % and served as control, K₂Cr₂O7 (10 mg/kg bw) alone, or K₂Cr₂O7 in association with ZnCl2 (20 mg/kg bw). Hepatic biochemical parameters, oxidative stress biomarkers and DNA damage were monitored. Results revealed that K₂Cr₂O7 disturbed plasma ALT, AST, ALP and GGT, induced hepatic oxidative stress and DNA fragmentation. The co-treatment with Zn has alleviated K2Cr2O7-induced hepatotoxicity by exhibiting antioxidant and genoprotective effects in pregnant Wistar rats.

Fedala A, Adjroud O, Abid-Essefi S, Timoumi R. Protective effects of selenium and zinc against potassium dichromate–induced thyroid disruption, oxidative stress, and DNA damage in pregnant Wistar rats. Environmental Science and Pollution Research. 2021;28 :22563–22576.Abstract

Hexavalent chromium (CrVI) is an environmental pollutant and an endocrine-disrupting metal. Se and Zn are essential trace elements, known to play a crucial role in thyroid homeostasis. However, there is a lack of data reporting thyrotoxicity during gestation. In this study, we investigated the protective effects of selenium and zinc against potassium dichromate–induced thyrotoxicity in pregnant Wistar rats. Thirty pregnant Wistar rats were divided into control and four treated groups receiving subcutaneously (s.c) on the 3rd day of pregnancy, K2Cr2O7 (10 mg/kg, s.c) alone, or in association with Se (0.3 mg/kg, s.c), ZnCl2 (20 mg/kg, s.c), or both of them simultaneously. The hormonal profile, oxidative stress biomarkers, DNA damage, and histological modifications were evaluated. Our main findings showed that K2Cr2O7 promoted hypothyroidism, oxidative stress, genotoxicity, and histological alterations in the thyroid gland. The co-treatment with Se or ZnCl2 has mitigated K2Cr2O7-induced thyrotoxicity in pregnant Wistar rats by exhibiting antioxidant and genoprotective effects. However, the combined co-treatment of both of them was less thyroprotective, and therefore, further investigations on the synergetic interaction of Se and Zn against CrVI toxicity using different doses and exposure routes are required.

Salah I, Adjroud O, Elwej A. Protective Effects of Selenium and Zinc Against Nickel Chloride–Induced Hormonal Changes and Oxidative Damage in Thyroid of Pregnant Rats. Biological Trace Element Research . 2021;155.Abstract

Nickel chloride (NiCl2) is a heavy metal that may affect the function of the thyroid. Selenium (Se) and zinc (Zn) are essential trace elements involved in thyroid hormone metabolism. However, little is reported about thyrotoxicity during gestation. The current study aimed to investigate the protective effects of selenium and zinc against NiCl2-induced thyrotoxicity in pregnant Wistar rats. Female rats were treated subcutaneously (s.c.) on the 3rd day of pregnancy, with NaCl 0.9% and served as control, NiCl2 (100 mg/kg body weight (BW)) alone, or in association with Se (0.3 mg/kg, s.c.), ZnCl2 (20 mg/kg, s.c.), or both of them simultaneously. Oxidative stress parameters, thyroid biomarkers, and histopathological examination were evaluated. Results showed that NiCl2 exposure caused a significant decrease in maternal body weight and an increase in absolute and relative thyroid weight compared to the controls. NiCl2 administration also led to decreased plasma triiodothyronine (T3) and thyroxine (T4) with a concomitant significant increase in thyroid-stimulating hormone (TSH) levels when compared to that of control. In addition, an overall pro-oxidant effect was associated with a decrease in the reduced glutathione (GSH) and nonprotein thiol (NPSH) contents and the enzymatic activity of glutathione peroxidase (GPx) and superoxide dismutase (SOD), and an increase in malondialdehyde (MDA). These biochemical disturbances were confirmed by histological changes. However, the co-treatment of Se and/or ZnCl2 attenuates NiCl2-induced changes. Our findings suggested that Se and ZnCl2 ameliorated NiCl2-induced thyrotoxicity in pregnant Wistar rats by exhibiting antioxidant effects.

2020
Salah I, Adjroud O, Fedala A, Saouli A. Potential Protective Effects of Selenium and Zinc against Thyroid Toxicity Induced by Nickel in Preimplanted Wistar Albino Rats. Toxicology International [Internet]. 2020;26 (1) :54–63. Publisher's VersionAbstract

Nickel Is A Heavy Metal That May Affect The Function Of The Thyroid. The Present Study Was Undertaken To Assess The Protective Effects Of Selenium And Zinc Against Nickel-induced Thyrotoxicity In Preimplanted Wistar Albino Rats. Nickel Is Administered Alone (100 Mg/kg Body Weight) Subcutaneously Or In Combination With Selenium (0.3 Mg/kg Body Weight) Either With Zinc (20 Mg/kg Body Weight) Or Combined With Both Selenium And Zinc. All Groups Of Rats Were Injected On Day 3 Of Gestation In The Pre-implantation Period. Exposure Of Rats To Nickel Caused A Significant Decrease In Maternal Body Weight On Days 6 And 20 Of Gestation And An Increase In Absolute And Relative Thyroid Weight Compared To The Controls. Nickel Treatment Was Also Led In Decreased Plasma Triiodothyronine, Thyroxine With A Concomitant Significant Increase In Thyroid-stimulating Hormone Levels When Compared To Control. These Changes Were Confirmed By Histological Damages. However, Co-administration Of Selenium And/or Zinc To Nickel-treated Rats Restored The Hormonal And Histological Aspects. Our Findings Suggested That Selenium And Zinc Ameliorated Nickel Induced Thyroid Damage.

BOULILA I, Adjroud O. PROTECTIVE EFFECTS OF SELENIUM AND ZINC ON NICKEL CHLORIDE INDUCED REPRODUCTIVE TOXICITY IN WISTAR ALBINOS PREIMPLANTED RATS. Studia Universitatis Vasile Goldis Seria Stiintele Vietii (Life Sciences ) . 2020;30 (3) :126 - 135.Abstract

: The aim of this study was to investigate that nickel chloride (NiCl2) induced reproductive toxicity in pre- implanted Wistar Rats and examined the possible protective effect of zinc chloride and selenium on plasma concentration of the hormones of 17 b etradiol (E2) and progesterone (prog); on the reproductive organ’s histology and on development. Experimental results showed the subcutaneous (s.c) administration of Nicl2 to Wistar albino Rats induced a decrease in plasma concentration of E2 and prog in addition, disturbance in development parameters and structural damages to the histology of the reproductive organs. Conversely, Se and ZnCl2 dues to the antioxidants property, regulate the secretion of E2 and Prog hormones, prevent alterations in the reproductive organs and in development in preimplanted rates receiving NiCl2.

2019
Ouache R, Harkat H, Pale P, Oulmi K. Phytochemical compounds and anti-corrosion activity of Veronica rosea. Natural Product Research [Internet]. 2019;33 :1-5. Publisher's VersionAbstract

The aim of this work is the phytochemical study of the butanolic extract of the aerial parts of Veronica rosea. Four compounds 14 have been isolated using different chromatographic methods. The structures of these compounds were determined by NMR spectral analysis and mass spectroscopy. The adsorption and anticorrosion effects of this extract were investigated towards the corrosion of copper in 1 M HNO3 aqueous by the weight loss technique and potentiodynamic polarization. The results showed that the butanolic extract is a good inhibitor and the inhibition efficiency increases with increasing of concentration of the inhibitor. The adsorption of this extract on the copper specimen surface was spontaneous and obeyed the Langmuir’s adsorption isotherm. Large value of adsorption equilibrium Constant (K ads = 35 L g−1) was obtained. The polarization experiments confirmed the data obtained by gravimetric weight-loss. Tafel plot of polarization curves indicates that the extract acts as a mixed type inhibitor.

Graphical abstract

Laouer KA, Messala A, Saidi M. Neutropenie Chimio–induite : Profil Bactériologique. Journal Algérien de Médecine . 2019 :16-24.
Chafaa S, Belkhadria S, Mimeche F. Entomofauna investigations in the apricot orchards,Prunus armeniaca L. (Rosales Rosaceae), in Ouled Si Slimane, Batna, North EastAlgeria. Biodiversity Journal. 2019;10 (2) :95–100.Abstract

Researches carried out in the past years allowed to list an entomofauna that lives on the apricot orchards, Prunus armeniaca L. (Rosales Rosaceae), in Ouled Si Slimane (Batna Department, Algeria). The investigated period was from October 2014 until May 2015. The sampling techniques used were: hunting in sight, barber pots, colorful traps, entomological umbrella and the filleting net. We have identified a total of 125 species divided into 9 orders and 54 families in which Coleoptera and Hymenoptera were quantitatively represented. The phytophagous were the most present. Its Shannon Value exceeds 4.5 Bits and indicates a Specific Richness of the insects and diversification of ecological niches in this kind of fauna.

Chafaa S, Mimeche F, Chenchouni H. Diversity of insects associated with olive (Oleaceae) groves across a dryland climate gradient in Algeria. The Canadian Entomologist. 2019;151 (5) :629 - 647.Abstract

This study investigated insect diversity of olive (Olea europaea Linnaeus (Oleaceae)) groves grown in arid and semiarid climates in northeastern Algeria. Using several sampling techniques, a total of 1326 insect specimens were collected and identified into 151 species, 124 genera, 65 families, and 10 orders. Hymenoptera and Coleoptera were quantitatively the most abundant, whereas the dominant functional feeding groups were phytophages then predators. The entomofauna included several olive pests such as Bactrocera oleae (Rossi) (Diptera: Tephritidae), Parlatoria oleae (Colvée) (Hemiptera: Diaspididae), Euphyllura olivina (Costa) (Hemiptera: Liviidae), and Liothrips oleae Costa (Thysanoptera: Phlaeothripidae). Although insect diversity parameters recorded for both observed and expected species richness were higher in olive groves grown under semiarid compared with arid climate, the completeness rate of species richness obtained using the nonparametric incidence estimators was higher in arid olive groves. Generalised linear models showed that the number of individuals and species richness varied significantly between climates (P < 0.01), whereas the variation of the rest of diversity parameters was not significant. Diversity traits of insect assemblage of each climatic region were positively correlated. Besides, the Mantel permutation test revealed similar patterns (r = 0.91, P < 0.0001) between correlation matrices of the two climates. When increasing the number of samples, species richness extrapolation revealed that diversity is expected to increase by 130% in olive groves grown under arid climate and 93% in semiarid climate. These increases are related to continuous appearance of rare and scarce insects as demonstrated by species rarefaction curves. Even with high evenness values of insect communities, similarity was low between climate indicating the rarity and scarcity of populations.

Ouache R, Harkat H, Pale P, Oulmi K. Phytochemical compounds and anti-corrosion activity of Veronica rosea. Natural Product Research. 2019;33 (9) :1374-1378.Abstract

The aim of this work is the phytochemical study of the butanolic extract of the aerial parts of Veronica rosea. Four compounds 14 have been isolated using different chromatographic methods. The structures of these compounds were determined by NMR spectral analysis and mass spectroscopy. The adsorption and anticorrosion effects of this extract were investigated towards the corrosion of copper in 1 M HNO3 aqueous by the weight loss technique and potentiodynamic polarization. The results showed that the butanolic extract is a good inhibitor and the inhibition efficiency increases with increasing of concentration of the inhibitor. The adsorption of this extract on the copper specimen surface was spontaneous and obeyed the Langmuir’s adsorption isotherm. Large value of adsorption equilibrium Constant (K ads = 35 L g−1) was obtained. The polarization experiments confirmed the data obtained by gravimetric weight-loss. Tafel plot of polarization curves indicates that the extract acts as a mixed type inhibitor.

Graphical abstract

2018
Mehdid F, Rekkab N, Oukid S, Abad MT, Bradai M, Hamdi S, Boukhemia F, Hamladji RM, Nacer AR, Allouda M, et al. Epidemiological Study of Aplastic Anemia in Algeria for 844 Cases over 10 Years (2007-2016). Blood. 2018;132 (1) :5109.Abstract

Introduction: The aim of this work is to establish an epidemiological approach of aplastic anemia (AA) in Algeria, to identify the different therapeutic strategy and the patients outcomes.

Material and methods: This is a retrospective multi-center epidemiological study over 10 years (from 01 January 2007 to 31 December 2016). The source of information is represented by the medical files and the consultation sheets. The collection of information is ensured by the fact sheets established and distributed to the departments Hematology and Pediatrics at the national level.

Results: A total of 844 cards were received, concerning 844 patients including 746 adults and 94 children. The overall incidence of the disease is 0.21, it varies from 0.16 to 0.28 / 100000 inhabitants / year depending on the year. The average age is 34.7 years with extremes ranging from 1 month to 91 years, the sex ratio (M / F) is 1 (420/424). In adults there is a slight male predominance: sex ratio is 1.11 (421/378). AA is acquired in 806 patients (95.4%) and congenital in 38 patients (4.6%). Among the acquired AA: idiopathic = 694 (86.1%), toxic = 18 (2.23%), viral: 17 (2.1%): HBV = 13, HCV = 3, HIV = 1, drug = 13 (1.6%), gestational = 9, (1.1%), hematopoietic tuberculosis = 1. The presence of an HPN clone in 55 out of 261 patients studied was 21%, associated with a dysimmunitary disease = 5. In congenital AM, Fanconi anemia = 35, Blackfand-Diamond = 2, congenital dyskeratosis = 1. The prognostic classification according to the Camitta criteria and the EBMT criterion: out of 540 evaluable records found: very severe = 83 (15.3%), severe = 291 (53.8%), moderate = 166 (30.7%). CsA-SAL reference immunosuppressive therapy was instituted in only 49 pts (13.1%) with severe and very severe forms. It resulted in a hematologic response in 18 patients (36.5%), 15 patients died and 16 patients were probably lost to follow-up. Three hundred and twenty-seven pts (38.7%) received allogeneic hematopoietic stem cell transplant at CPMC (n = 316) and EHU (n = 11); = 277), Fanconi anemia (n = 44), amgacaryocytosis in its aplastic form (n = 3), erythroblastopenia in aplastic form (n = 2), untagged constitutional medullary aplasia (n = 1). As of 31/12/2016: 344 pts are alive, 208 died, 194 lost sight of and 98 pts whose fate is not specified on the cards.

Conclusion: AA is a rare , the incidence is 0.2 / 100000 inhabitants / year. It affects young adults with a slight male predominance in adults, idiopathic forms are in the foreground and severe forms predominat

Disclosures

No relevant conflicts of interest to declare.

Grifi F, Djenouni A, Bougherira S, Abad MT, Boucherit C, Boudjerra N, Zidani N, Aboura C, Aribi A, Belhani M, et al. Epidemiological Study on β-Thalassemia in Algeria. Blood. 2018;132 (1) :4902.Abstract

Introduction : Among genetic diseases in hematology, β Thalassemia ranks second after sickle cell disorders in Algeria. Given the seriousness and cost of the care that arises, a national action plan is needed. As a starting point, a national survey is essential to know the epidemiological situation of this disease.

Objective : To determine the soci-demographic, diagnosis and evolution characteristics of major and intermediate thalassemia in Algeria.

Materiels and Methods : This is a multicenter, retrospective, analytical study of 775 patients with thalassemia major (TM: 598 cases) and intermediate (TI: 177 cases). This national survey is representative of 21 services (Hematology: 19, Pediatrics: 03). The data was collected from medical records on a survey card distributed to all relevant services.

Results : As of January 1, 2017, the prevalence of β Thalassemia estimated from this study is of the order of 3.47 cases per 100 000 inhabitants. The current average age of major thalassemia (MT) is 17.90 years, with extremes of [1-44 years], that of intermediate form (IT) is 23 years old with extremes of [1-61 years], the sex ratio is 1.15. The concept of consanguinity is specified in 499 patients and is present in 49.30% of cases, the geographical origin of patients is variable, 53% are from the center of the country and 43% from the east. The circumstances of the diagnosis are known in 87.25% of subjects, these are clinical symptoms in 93.91% of patients, with an average age at diagnosis of 16.31 months for MT and 5.5 years for IT. The diagnosis is neonatal in only 5.68% of cases. Blood cells transfusion needs are known in 80% of our cohort, 86% receive a systematic and regular diet; 554 patients are on chelation therapy, the main modality being deferoxamine or Deferasirox type monotherapy. 40 MT patients received Hematopoetic Stem Cell Transplantation. The monitoring of iron overload was based mainly on the determination of ferritinemia, only 8.8% of patients received cardiac and hepatic MRI. Various complications associated with iron overload have been reported, the most common being: Hepatic injury (48%), heart disease (36%), diabetes (30%), hypothyroidism (29.17). %), with average ages of onset of 26.67, 18, 19, and 14.50 years, respectively. In addition, viral serology was performed in 536 patients, 64 (11.9%) of whom were carriers of anti-HCV Ab.

Conclusion : The quality and life expectancy of thalassemic patients has improved significantly in recent years; complications related to iron overload remain the leading cause of death, the means of evaluation remain insufficient in our country. In addition, the care of our patients must be standardized on the national territory.

Disclosures

No relevant conflicts of interest to declare.

BOUKHTACHE NAOUAL, BACHIR ABDELKRIMSI, BELHAMRA MOHAMED, Chafaa S, GHAZI CHERIF, OUCHEN SAWSEN. DYNAMIQUE DES POPULATIONS ET MODALITES D’INFESTATION DE POLLINIA POLLINI COSTA, 1857 (HOMOPTERA, ASTEROLECANIIDAE) SUR L’OLIVIER OLEA EURPAEA L. DANS LA REGION SEMI-ARIDE D’ARRIS (BATNA, NORD-EST D’ALGERIE). Courrier du Savoir. 2018;26.Abstract

Le suivi démo-écologique de la cochenille Pollinia pollini est réalisée dans une oliveraie de la région semi-aride d’Arris (Nord-est Algérie) durant une période d’une année, allant de janvier à décembre 2015. L’étude du mode d’infestation de l’olivier Olea eurpaea par la cochenille est basée sur des dénombrements des différents stades de développement de l’espèce sur les rameaux. Ces dénombrements sont réalisés suivant les orientations de l’arbre (Nord, Est, Sud, Ouest et Centre) et suivant le mode d’installation de la cochenille sur les rameaux (à la surface des rameaux, aux aisselles des rameaux et des feuilles ou à l’intérieur du bois). Ce travail montre que P. pollini évolue en une seule génération annuelle. La parution des larves du premier stade commence à la troisième décade de mars et se poursuit jusqu’à la mi-août. Les larves du deuxième stade apparaissent à la troisième décade d’avril et enregistrent leur pic en juillet. Les femelles adultes, qui sont présentes le long de la période d’étude, enregistrent leurs effectifs maximaux en octobre et en novembre. L’étude de l’abondance globale de P. pollini en fonction des orientations montre que l’espèce s’installe préférentiellement dans les parties Nord, Est et Ouest de l’arbre, avec des proportions relativement proches allant de 20 % à 22 %. Le suivi de l’emplacement de P. pollini sur les rameaux de l’olivier montre que la cochenille s’installe dans trois emplacements différents. Elle préfère s’installer aux aisselles des rameaux et des feuilles (43,23 %), à la surface des rameaux (29,15 %) et à l’intérieur du bois (27,62 %).

Mimeche F, Zedam A, Chafaa S, Mimeche H, Biche M. Seasonal study of the diet of the barbel Luciobarbus callensis (Valencienne1842) in the K'sob reservoir (M'Sila, Algeria). Journal of Water Science . 2018;31 (2) : 89-171 .Abstract

The composition of the diet of the barbel (Luciobarbus callensis) was studied in the K'sob reservoir near the town of M'Sila (Algeria). The capture of the barbels was carried out between September 2010 and August 2011.The diet was studied from 379 specimens collected by trammel net. During the study period, it was noted that the food spectrum essentially consisted of Chironomids, Ephemeroptera and Copepods, which are abundant in the environment. The barbel of the K'sob reservoir has a seasonal food pattern influenced by climatic and ecological conditions and by its reproductive cycle. The diet of L. callensis in the study area is omnivorous, with a zoo-benthophage tendency.

Mimeche F, Zedam A, Chafaa S, Mimeche H, Biche M. Étude saisonnière du régime alimentaire du barbeau Luciobarbus callensis (Valencienne 1842) dans le réservoir de K'sob (M'Sila, Algérie). Revue des sciences de l’eau. 2018;31 (2) :89-171 .Abstract

The composition of the diet of the barbel (Luciobarbus callensis) was studied in the K'sob reservoir near the town of M'Sila (Algeria). The capture of the barbels was carried out between September 2010 and August 2011.The diet was studied from 379 specimens collected by trammel net. During the study period, it was noted that the food spectrum essentially consisted of Chironomids, Ephemeroptera and Copepods, which are abundant in the environment. The barbel of the K'sob reservoir has a seasonal food pattern influenced by climatic and ecological conditions and by its reproductive cycle. The diet of L. callensis in the study area is omnivorous, with a zoo-benthophage tendency.

2017
Saidi M, Abad MT, Taoussi S, Ghezlane C, Hamladji RM, Ahmed-Nacer R, Belhadri F, Moussaoui H, Ait-Ali H, Aftisse H, et al. Epidemiological Data from the Algerian Multiple Myeloma Registry (AMMR) over 2 Years (June 2014-June 2016): Report of the Algerian Multiple Myeloma Study Group (GETMA). Blood. 2017;130 (1) :5385.Abstract

Introduction: Multiple myeloma (MM) is the second hematological malignancy in Western countries with varying incidence across countries and ethnicities. In France, the incidence rate in 2012 is 4.2 in men and 2.0 in women, in USA it is 5.6 but in the population of African origin it is 11.1. In Maghreb, the incidence is 1,1 in Algeria and Morocco and 1.4 in Tunisia in 2004. Although epidemiological transition has taken place in our country, the results of epidemiological data on cancers in general and hematological malignancies in particular are remarkably different from those described in the Western literature.

Aims : Two epidemiological approaches were carried out in Algeria, the first covering a period of 12 years (1995-2005) and the second of 2006-2012, the incidence of MM was the same of 1.1 and 1.01 respectively. These were retrospective studies with the limitations of this type of study, hence the need to create a register that would collect the data in a prospective and real-time manner. This register, known as AMMR (Algerian Multiple Myeloma Registry) belongs to the SAHTS (Algerian Society of Hematology), was created in 2014 after obtaining the approval of the Ministry of Health. The objectives of this register are:

- Obtain reliable epidemiological data

- Describe the profile of Algerian patients (pts)

- To have an analysis of the diagnostic approaches in all the hematology departments

- And measure diagnostic and prognostic difficulties.

The AMMR is a prospective, observational, multicenter study.

Materials and methods: With the support of a contracted clinical research company, we developed a 19 pages case report form (CRF) which registered all newly pts with MM, plasmocytomas. The main registered variables at diagnosis are patient demographics, disease characteristics, complications, biology, imaging, diagnosis, prognosis and only one item on treatment. All hematology services (17) participated in the study with the help of 23 investigators to inform the CRF. The diagnostic criteria used are those of the IMWG 2003, the prognosis is evaluated according to the classification of Salmon and Durie and the International Staging System.

Results: Thus, 1010 pts are collected during these 2 years, 505 men and 505 women. The median age is 63 years (29-100 years), 53% are under 65 years, 13% under 50 years and 18% more than 75 years old. The age-standardized incidence rate (world population WHO 2000-2025) of MM for the year 2015 is 1.71 / 105 inhabitants (1.75 for men and 1.68 for women). In this series: 975 pts (96.53%) are secreting MM and 20 non-secretory MM(1.98%), 4 plasmocytoma (0.40%) and 2 plasma cell leukemias (0.20%). According to the geographical distribution, 62% of the patients are in the middle of Algeria, 19% of the western region and 19% of the eastern region. Among the risk factors for the occurrence of MM, a MGUS is found in 16 pts, a professional activity at risk in 96 pts of which 57 workers of the earth. The clinical feature at diagnosis is dominated by bone syndrome since 92% have bone symptoms, pain in 80.4% of cases and pathological fractures for 96 pts (12%). Neurological signs related to medullary compression are described in 89 pts, anemia is the second complication (56% of the pts). Biological characteristics, the immunological type are IgG type in 50.67% of cases, IgA in 26.36%, light chains in 21.64% of the secreeting MM. All the pts are classified according to the classification of Salmon and Durie, 82% are stages III and 13% of the stages II, among them 24% are classified B. The ISS classification is used in 72% of the pts, with 16.21% stage I, 18.56% stage II and 36.92% stage III. Flow cytometry is performed only in 45 pts (4.5%) and cytogenetics in only one patient.

Comments and conclusion: This study shows that the number of pts with MM is important in our country: more than 1000 in 2 years, whereas the previous data did not exceed 350 pts/year. The median age is 63 years, with 53% under 65 years candidates for therapeutic intensification. On the other hand the incidence is 1.71 higher than the two previous studies; this is explained by the rigor of the prospective studies but not by an increase of the frequency. The data collected still show pts diagnosed later (82% stage III) with complications. We deplore the lack of genetics study for our pts. The AMMR is the first hematological malignancy registry in Algeria, is a reliable data bank, which will allow us to claim more diagnostic, pronostic assessment and care for our pts.

Disclosures

No relevant conflicts of interest to declare.

Baira F, Zidani M, Farh H, Messaoudi S, Ziar T, Helbert AL, Baudin T. Deformation and Recrystallised Texture Evolution and the Followed Mechanical and Electrical Properties of Drawn and Annealed Copper Wires. International Journal of Engineering Research in Africa. 2017;31 :20-28.Abstract

Copper destined for electrical cabling require a compromise of mechanical properties and electrical resistivity. The drawing process accompanied by the formation of crystalline defects, such as gaps and dislocations, which leads to the increase in hardness, and therefore to the increase in resistivity, a very important characteristic for the conductivity and the efficiency of the cable. The scope of this work is to investigate the phenomenon of deformation texture evolution while copper wire drawn destined for electric cable-making and to understand its relationship with the electrical conductivity. In this study, we notice that the hardness and the resistivity increase with an increase of the deformation level. On the other hand, a slight decrease in the resistivity of the wires was observed after a holding time of 30 min at 260°C. The annealing of wires at 260°C for 9 min of holding time leads to a recrystallisation especially for high deformations and a gradual return of the mechanical properties and of the microstructure towards a state close to the state of the wire rod with the extension of time . The recrystallization texture is composed of the same components as the drawing texture, fibers <111>//ND (Normal Direction) and <001>//ND. The decrease in the intensity of the fiber after annealing is observed. On the other hand, the fiber <001> // ND remains stable.

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