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Magdy G, Said N, El-Domany RA, Belal F. Novel fluorescent probes based on sulfur and nitrogen co-doped carbon dots for determination of three N-substituted phenothiazine derivatives in dosage forms. Spectrochim Acta A Mol Biomol Spectrosc 2024; 314:124207. [PMID: 38554691 DOI: 10.1016/j.saa.2024.124207] [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: 01/19/2024] [Revised: 03/01/2024] [Accepted: 03/26/2024] [Indexed: 04/02/2024]
Abstract
In the current work, sulfur and nitrogen co-doped carbon dots (S,N-CDs) as simple, sensitive, and selective turn-off fluorescent nanosensors were utilized for analysis of three phenothiazine derivatives, including acetophenazine (APZ), chlorpromazine (CPH), and promethazine (PZH). S,N-CDs were synthesized through a green one-pot microwave-assisted technique using widely available precursors (thiourea and ascorbic acid). HRTEM, EDX, FTIR spectroscopy, UV-Vis absorption spectroscopy, and fluorescence spectroscopy were used to characterize the as-synthesized CDs. When excited at 330 nm, the carbon dots produced a maximum emission peak at 410 nm. The cited drugs statically quenched the S,N-CDs fluorescence as revealed by the Stern-Volmer equation. The current method represents the first spectrofluorimetric approach for the determination of the studied drugs without the need for chemical derivatization or harsh reaction conditions. The importance of the proposed work is magnified as the cited drugs do not have any fluorescent properties. The fluorescence of the developed sensor exhibited a linear response to APZ, CPH, and PZH in the concentration ranges of 5.0-100.0, 10.0-100.0, and 10.0-200.0 μM with detection limits of 1.53, 1.66, and 2.47 μM, respectively. The developed fluorescent probes have the advantages of rapidity and selectivity for APZ, CPH, and PZH analysis in tablets with acceptable % recoveries of (98.06-101.66 %). Evaluation of the method's greenness was performed using the Complementary Green Analytical Procedure Index (ComplexGAPI) and Analytical GREEnness metric (AGREE) metrics, indicating that the method is environmentally friendly. Validation of the proposed method was performed according to ICHQ2 (R1) guidelines.
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Affiliation(s)
- Galal Magdy
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh, P.O. Box 33511, Egypt; Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura National University, Gamasa, 7731168, Egypt.
| | - Noura Said
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh, P.O. Box 33511, Egypt
| | - Ramadan A El-Domany
- Department of Microbiology and Immunology, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh, P.O. Box 33511, Egypt
| | - Fathalla Belal
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, P.O. Box 35516, Egypt
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2
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Magdy G, Said N, El-Domany RA, Belal F. Nitrogen and sulfur-doped carbon quantum dots as fluorescent nanoprobes for spectrofluorimetric determination of olanzapine and diazepam in biological fluids and dosage forms: application to content uniformity testing. BMC Chem 2022; 16:98. [PMID: 36380347 PMCID: PMC9667599 DOI: 10.1186/s13065-022-00894-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Accepted: 11/02/2022] [Indexed: 11/16/2022] Open
Abstract
A validated, sensitive, and simple spectrofluorimetric method was developed for the analysis of two important CNS-acting drugs, olanzapine and diazepam, in their commercial tablets without the need for any pretreatment steps. The developed method relied on the quantitative quenching effect of each of olanzapine and diazepam on the native fluorescence of nitrogen and sulfur-doped carbon quantum dots (NS@CQDs). NS@CQDs were prepared from thiosemicarbazide and citric acid by a facile one-pot hydrothermal technique. The synthesized NS@CQDs were characterized by different spectroscopic and microscopic techniques. NS@CQDs produced a maximum emission peak at 430 nm using 360 nm as an excitation wavelength. Calibration curves showed a good linear regression over the range of 5.0–200.0 and 1.0–100.0 μM with detection limits of 0.68 and 0.29 μM for olanzapine and diazepam, respectively. The adopted method was used for the determination of the investigated drugs in their tablets with high % recoveries (98.84–101.70%) and low % RSD values (< 2%). As diazepam is one of the most commonly abused benzodiazepines, the developed method was successfully applied for its determination in spiked human plasma with high % recoveries and low % RSD values, providing further insights for monitoring its potential abuse. The quenching mechanism was also studied and confirmed to be through dynamic and static quenching for olanzapine and diazepam, respectively. Due to the high selectivity and sensitivity, content uniformity testing of low-dose tablets was successfully performed by applying the United States Pharmacopoeia guidelines. The method's validation was performed in compliance with ICHQ2 (R1) recommendations.
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Said N, Lee J, Dhadphale E, Lee J, Nasr S. 3 Cystic fibrosis–related diabetes—adherence to screening at a large clinical center. J Cyst Fibros 2022. [DOI: 10.1016/s1569-1993(22)00694-4] [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: 11/06/2022]
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Ontoria Y, Webster C, Said N, Ruiz JM, Pérez M, Romero J, McMahon K. Positive effects of high salinity can buffer the negative effects of experimental warming on functional traits of the seagrass Halophila ovalis. Mar Pollut Bull 2020; 158:111404. [PMID: 32753189 DOI: 10.1016/j.marpolbul.2020.111404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 06/21/2020] [Accepted: 06/23/2020] [Indexed: 06/11/2023]
Abstract
Coastal ecosystems, and especially estuaries, are subject to environmental fluctuations that can be amplified by anthropogenic changes. Under a future scenario of global warming, temperature and salinity are likely to be altered and the persistence of macrophyte-dominated ecosystems can be compromised, particularly native or local seagrass communities. This study examined the response of the local seagrass Halophila ovalis to the joint effect of a short-term salinity increase and a transient temperature stress, through two mesocosm experiments. Warming caused a decline in Fv/Fm, TNC content in leaves and plant growth, and increased dark respiration, revealing clear detrimental symptoms of heat stress on plant metabolism and performance. Salinity increase in isolation favoured ramet survival. However, in combination with warming, salinity had a positive effect on Gross Pmax. This suggests that increased salinities might dampen the negative effects of high temperatures, buffering, to some extent, the impact of global warming in temperate estuaries.
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Affiliation(s)
- Y Ontoria
- Department of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain.
| | - C Webster
- Centre for Marine Ecosystems Research, School of Science, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA 6027, Australia
| | - N Said
- Centre for Marine Ecosystems Research, School of Science, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA 6027, Australia
| | - J M Ruiz
- Seagrass Ecology Group, Oceanographic Center of Murcia, Spanish Institute of Oceanography, C/Varadero 1, 30740 San Pedro del Pinatar, Murcia, Spain
| | - M Pérez
- Department of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
| | - J Romero
- Department of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
| | - K McMahon
- Centre for Marine Ecosystems Research, School of Science, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA 6027, Australia
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Ben Fatma L, Belaid I, Said N, Gahbiche S, Hochlef M, Chabchoub I, Ezzairi F, Ben Ahmed S. What could be the reasons of late diagnosis of breast cancer in Tunisia? Tunis Med 2018; 96:665-671. [PMID: 30746659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
INTRODUCTION Breast cancer is often diagnosed at a late stage in Tunisia with long delay in time to consultation and to diagnosis. The aim of the study was to identify explanatory factors to delayed diagnosis. METHODS A case control analytical was performed from January 2013 to December 2014 in the department of Medical Oncology in FarhatHachedUniveristy Hospital.Patients with the diagnosis of ductal breast carcinoma were included in the study.Characteristics of a first group of 200 women with locally advanced or metastatic breast cancer (G1)were compared to a second group of 200 patients with early stage (G2). RESULTS Median delay in consultation and mean tumor size were significantly more important in group G1 (p<0,001).A low level of schooling, a rural origin, poor socio-economic conditions and no encouragement by the patient relatives do not allow an early diagnosis.Misinterpretation of clinical breast signs was the only explanatory factor related to the system. In multivariate study, a low level of schooling(adjusted OR=2.72; CI 95% [1,65-4,49]), no encouragement by the patient's relatives(adjusted OR=7.86; CI 95% [4,24-14,57])and more than three dependants(adjusted OR=2.49; CI 95% [1,58-3,93]) were the independent factors that could explain the delay in diagnosis. CONCLUSION Our study confirm the inverse relationship between socio-economic and scholar level and disease stage. Health education campaigns particularly among women with a low schooling level and of rural origin could reduce time for consultation. Promoting continuing medical education could avoid diagnostic errors.
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MESH Headings
- Adult
- Breast Neoplasms/diagnosis
- Breast Neoplasms/epidemiology
- Breast Neoplasms/pathology
- Breast Neoplasms/therapy
- Carcinoma, Ductal, Breast/diagnosis
- Carcinoma, Ductal, Breast/epidemiology
- Carcinoma, Ductal, Breast/pathology
- Carcinoma, Ductal, Breast/therapy
- Case-Control Studies
- Delayed Diagnosis/adverse effects
- Delayed Diagnosis/prevention & control
- Delayed Diagnosis/statistics & numerical data
- Female
- Health Knowledge, Attitudes, Practice
- Health Services Accessibility/statistics & numerical data
- Humans
- Middle Aged
- Patient Acceptance of Health Care
- Risk Factors
- Socioeconomic Factors
- Time Factors
- Time-to-Treatment/statistics & numerical data
- Tumor Burden
- Tunisia/epidemiology
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Ghodbane M, Boumeddane B, Said N. Design and experimental study of a solar system for heating water utilizing a linear Fresnel reflector. J Fundam and Appl Sci 2018. [DOI: 10.4314/jfas.v8i3.8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [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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Lakehayli S, Said N, El Khachibi M, El Ouahli M, Nadifi S, Hakkou F, Tazi A. Prenatal stress alters diazepam withdrawal syndrome and 5HT1A receptor expression in the raphe nuclei of adult rats. Neuroscience 2016; 330:50-6. [DOI: 10.1016/j.neuroscience.2016.05.035] [Citation(s) in RCA: 3] [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] [Received: 01/07/2016] [Revised: 05/17/2016] [Accepted: 05/17/2016] [Indexed: 10/21/2022]
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Said N, Lakehayli S, El Khachibi M, El Ouahli M, Nadifi S, Hakkou F, Tazi A. Prenatal stress induces vulnerability to nicotine addiction and alters D2 receptors' expression in the nucleus accumbens in adult rats. Neuroscience 2015; 304:279-85. [PMID: 26192093 DOI: 10.1016/j.neuroscience.2015.07.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [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: 03/09/2015] [Revised: 06/22/2015] [Accepted: 07/10/2015] [Indexed: 01/15/2023]
Abstract
Prenatal stress (PS) can induce several long-lasting behavioral and molecular abnormalities in rats. It can also be considered as a risk factor for many psychiatric diseases like schizophrenia, depression or PTSD and predispose to addiction. In this study, we investigated the effect of prenatal stress on the reinforcing properties of nicotine in the CPP paradigm. Then, we examined the mRNA expression of the D2 dopaminergic receptors using the quantitative real-time PCR technique in the nucleus accumbens (NAcc). We found that prenatally stressed rats exhibited a greater place preference for the nicotine-paired compartment than the control rats. Moreover, we observed an overexpression of the DRD2 gene in adult offspring stressed in utero and a downregulation in the PS NIC group (PS rats treated with nicotine) compared with their control counterparts (C NIC). These data suggest that maternal stress can permanently alter the offspring's addictive behavior and D2 receptors' expression.
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Affiliation(s)
- N Said
- Laboratory of Pharmacology, Faculty of Medicine and Pharmacy of Casablanca, 19 Rue Tarik Bnou Ziad, Casablanca, Morocco.
| | - S Lakehayli
- Laboratory of Pharmacology, Faculty of Medicine and Pharmacy of Casablanca, 19 Rue Tarik Bnou Ziad, Casablanca, Morocco
| | - M El Khachibi
- Genetics and Molecular Pathology Laboratory, Faculty of Medicine and Pharmacy of Casablanca, 19 Rue Tarik Bnou Ziad, Casablanca, Morocco
| | - M El Ouahli
- Sultan Moulay Slimane University, Faculty of Sciences & Techniques Beni-Mellal, Life Sciences, Morocco
| | - S Nadifi
- Genetics and Molecular Pathology Laboratory, Faculty of Medicine and Pharmacy of Casablanca, 19 Rue Tarik Bnou Ziad, Casablanca, Morocco
| | - F Hakkou
- Laboratory of Pharmacology, Faculty of Medicine and Pharmacy of Casablanca, 19 Rue Tarik Bnou Ziad, Casablanca, Morocco
| | - A Tazi
- Laboratory of Pharmacology, Faculty of Medicine and Pharmacy of Casablanca, 19 Rue Tarik Bnou Ziad, Casablanca, Morocco
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9
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Lakehayli S, Said N, Khachibi ME, Ouahli ME, Nadifi S, Hakkou F, Tazi A. Long-term effects of prenatal stress and diazepam on D2 receptor expression in the nucleus accumbens of adult rats. Neurosci Lett 2015; 594:133-6. [DOI: 10.1016/j.neulet.2015.03.065] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 03/27/2015] [Accepted: 03/30/2015] [Indexed: 01/11/2023]
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10
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Said N, Lakehayli S, Khachibi ME, Ouahli ME, Nadifi S, Hakkou F, Tazi A. Effect of prenatal stress on memory, nicotine withdrawal and 5HT1A expression in raphe nuclei of adult rats. Int J Dev Neurosci 2015; 43:92-8. [DOI: 10.1016/j.ijdevneu.2015.04.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 03/28/2015] [Accepted: 04/16/2015] [Indexed: 10/23/2022] Open
Affiliation(s)
- N. Said
- Laboratory of PharmacologyFaculty of Medicine and Pharmacy of Casablanca19 Rue Tarik Bnou ZiadCasablancaMorocco
| | - S. Lakehayli
- Laboratory of PharmacologyFaculty of Medicine and Pharmacy of Casablanca19 Rue Tarik Bnou ZiadCasablancaMorocco
| | - M. El Khachibi
- Genetics and Molecular Pathology LaboratoryFaculty of Medicine and Pharmacy of Casablanca19 Rue Tarik Bnou ZiadCasablancaMorocco
| | - M. El Ouahli
- Sultan My Slimane UniversityFac Sciences & Tecniques Beni‐MellalLife SciencesMorocco
| | - S. Nadifi
- Genetics and Molecular Pathology LaboratoryFaculty of Medicine and Pharmacy of Casablanca19 Rue Tarik Bnou ZiadCasablancaMorocco
| | - F. Hakkou
- Laboratory of PharmacologyFaculty of Medicine and Pharmacy of Casablanca19 Rue Tarik Bnou ZiadCasablancaMorocco
| | - A. Tazi
- Laboratory of PharmacologyFaculty of Medicine and Pharmacy of Casablanca19 Rue Tarik Bnou ZiadCasablancaMorocco
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Abstract
We assess the anxiety-like behavior in the open field and elevated plus maze tests and measure the nociceptive response in the tail flick test following prenatal stress exposure in adult male and female Wistar rats. In both behavioral anxiety tests, prenatal stress increased the anxiety-like behavior in male PS rats, but not in females suggesting a strong sex-dependent anxiogenic effect. The tail flick results showed a hypersensitivity to pain in male and female PS rats with a subtle gender difference. These findings suggest that prenatal stress is an important risk factor for multiple mental disorders.
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Affiliation(s)
- N Said
- Department of Pharmacology, Faculty of Medicine and Pharmacy of Casablanca, Casablanca, Morocco 20100, Morocco
| | - S Lakehayli
- Department of Pharmacology, Faculty of Medicine and Pharmacy of Casablanca, Casablanca, Morocco 20100, Morocco
| | - O Battas
- Laboratory of Clinical Neurosciences and Mental Health, Faculty of Medicine and Pharmacy of Casablanca Casablanca, Morocco 20100, Morocco
| | - F Hakkou
- Department of Pharmacology, Faculty of Medicine and Pharmacy of Casablanca, Casablanca, Morocco 20100, Morocco
| | - A Tazi
- Department of Pharmacology, Faculty of Medicine and Pharmacy of Casablanca, Casablanca, Morocco 20100, Morocco
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12
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Silmi K, Said N, Kingori C, Bianco J, Pavey L, Jamu L, Marape M. Sexual violence among orphaned children in Botswana: identifying risk and
protective factors for effective prevention and response. Ann Glob Health 2015. [DOI: 10.1016/j.aogh.2015.02.774] [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] Open
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13
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Lakehayli S, Said N, Battas O, Hakkou F, Tazi A. Prenatal stress alters sensitivity to benzodiazepines in adult rats. Neurosci Lett 2015; 591:187-191. [DOI: 10.1016/j.neulet.2015.02.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Revised: 02/08/2015] [Accepted: 02/09/2015] [Indexed: 02/07/2023]
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14
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Said N, Bishara T, García-Maraver A, Zamorano M. Effect of water washing on the thermal behavior of rice straw. Waste Manag 2013; 33:2250-2256. [PMID: 23932080 DOI: 10.1016/j.wasman.2013.07.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [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: 03/01/2013] [Revised: 06/19/2013] [Accepted: 07/12/2013] [Indexed: 06/02/2023]
Abstract
Rice straw can be used as a renewable fuel for heat and power generation. It is a viable mean of replacing fossil fuels and preventing pollution caused by open burning, especially in the areas where this residual biomass is generated. Nevertheless, the thermal conversion of rice straw can cause some operating problems such as slag formation, which negatively affects thermal conversion systems. So, the main objective of this research is studying the combustion behavior of rice straw samples collected from various regions by applying thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). In addition, the thermal behavior of ashes from rice straw was also analyzed in order to detect their melting points, and ash sintering was detected at different temperatures within the range between 550 and 1000°C. Since washing rice straw with water could reduce the content of undesirable inorganic compounds related to the ash fusibility, samples of washed rice straw were analyzed under combustion conditions to investigate its differences regarding the thermal behavior of rice straw. The results showed that rice straw washing led to a significant improvement in its thermal behavior, since it reduced the ash contents and sintering formation.
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Affiliation(s)
- N Said
- Civil Engineering Department, University of Granada, Campus de Fuentenueva, 18071 Granada, Spain; Environmental Engineering Department, Faculty of Engineering, Zagazig University, 44519 Zagazig, Egypt.
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Ghannouchi N, Ben Jazia E, Said N, Alaoua O, Khalifa M, Braham A, Bahri F, Letaief A. Une association rare de maladie cœliaque à une sclérodermie systémique et une maladie d’Addison. Rev Med Interne 2011. [DOI: 10.1016/j.revmed.2011.10.233] [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: 11/26/2022]
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16
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Belajouza S, Said N, Yahiaoui S, Bouauoina N. Place de la radiothérapie dans le traitement du cancer de la vulve. Cancer Radiother 2011. [DOI: 10.1016/j.canrad.2011.07.206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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17
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Said N, Frierson HF, Chernauskas D, Conaway M, Motamed K, Theodorescu D. The role of SPARC in the TRAMP model of prostate carcinogenesis and progression. Oncogene 2009; 28:3487-98. [PMID: 19597474 DOI: 10.1038/onc.2009.205] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
SPARC (Secreted Protein Acidic and Rich in Cysteine), is a matricellular glycoprotein that is produced by tumor and/or neighboring stroma. In human prostate cancer, SPARC immunoreactivity is highest in metastatic lesions but distinct contributions of tumoral and stromal SPARC to tumorigenesis and progression are unclear. To determine the role of SPARC in primary prostate tumorigenesis, we crossed SPARC-null (SP(-/-)) with TRAMP (Transgenic Adenocarcinoma of Mouse Prostate) mice. TRAMP(+)/SP(-/-) mice exhibited accelerated cancer development and progression. Compared to their TRAMP(+)/SP(-/-) counterparts, TRAMP(+)/SP(+/+) tumors had fewer proliferating cells, and decreased cyclins A and D1 with increased p21(Cip) and p27(Kip). Similar effects on proliferation and cell-cycle regulators were observed in human prostate cancer cell lines, transiently transfected with pSPARC. TRAMP(+)/SP(-/-) tumors exhibited decreased stromal collagen, enhanced matrix metalloproteinase activity and increased vascular endothelial growth factor, proinflammatory cytokines. To determine the contribution of stromal SPARC, we evaluated subcutaneous tumor growth of TRAMP cell lines in syngeneic SP(+/+) and SP(-/-) mice. Enhanced growth, decreased stromal collagen and increased proteolysis were noted in SP(-/-) mice. Our findings demonstrate that both tumor and stromal SPARC are limiting for primary prostate tumorigenesis and progression, through effects on the cell cycle and the creation of a less favorable tumor microenvironment.
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Affiliation(s)
- N Said
- Department of Urology, University of Virginia, Charlottesville, VA 22908, USA
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18
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Abstract
The present survey was carried out in the Military Center of Blood Transfusion from January 1998 to December 2001. 63,375 blood donors were concerned coming from different regions of Tunisia. Gene frequencies were found as follows: O = 0.686, A = 0.196 and B = 0.120. Important variations are observed between different regions of the country. The comparison with other countries' results traces the history of the Tunisian population, Tunisia being a strategic point in the Mediterranean region.
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Affiliation(s)
- N Said
- Centre militaire de transfusion sanguine, 1, rue des Etats-Unis, 2000 Le Bardo, Tunisie.
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19
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Triki H, Said N, Ben Salah A, Arrouji A, Ben Ahmed F, Bouguerra A, Hmida S, Dhahri R, Dellagi K. Seroepidemiology of hepatitis B, C and delta viruses in Tunisia. Trans R Soc Trop Med Hyg 1997; 91:11-4. [PMID: 9093616 DOI: 10.1016/s0035-9203(97)90374-6] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.7] [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: 02/04/2023] Open
Abstract
Serum samples from 33,363 healthy people in Tunisia have been tested for serological markers of hepatitis B, C and delta viruses (HBV, HCV and HDV). Hepatitis B surface antigen (HBsAg) was detected in 6.5% of sera. The overall seroprevalence of HBV was 37.5%. Vertical and perinatal transmission of HBV in the first 3 months of life occurred in only 0.4% of 177 mother and child pairs. HBV seroprevalence was 10.7% in infants under 5 years old and increased with age rapidly till 25 years of age and then more slowly in adulthood, reaching 54% for people aged over 40 years. HBsAg seropositivity varied throughout the country, ranging from 3% to 13% with higher prevalences in the south and central-west regions. Overall seroprevalences for HDV and HCV were 17.7% and 0.4%, respectively. HDV superinfection occurred later than HBV and increased with age in parallel with HBV. Overall, HCV and HBV infections had different geographical distributions throughout the country. The study confirmed the high prevalence of HBV infection in Tunisia; it occurs mainly in children and teenagers, and vertical and perinatal transmission of HBV does not appear to be significant. HDV superinfection is quite common in Tunisia and occurs in almost 44% of individuals infected with HBV. In contrast, seroprevalence of HCV in the Tunisian general population was low (0.4%). These results indicate differences in the distribution of the viruses and/or different routes of transmission.
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Affiliation(s)
- H Triki
- Institut Pasteur, Tunis, Tunisia
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20
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Said N, Regaya F, Ben Ahmed F, Karoui M, Boukef K. [A comparative study of ABO blood grouping reagents]. Tunis Med 1995; 73:477-80. [PMID: 9506146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Agungpiryono S, Yamada J, Kitamura N, Yamamoto Y, Said N, Sigit K, Yamashita T. Immunohistochemical study of the distribution of endocrine cells in the gastrointestinal tract of the lesser mouse deer (Tragulus javanicus). Acta Anat (Basel) 1994; 151:232-8. [PMID: 7537934 DOI: 10.1159/000147668] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The occurrence and distribution of endocrine cells in the gastrointestinal tract of the lesser mouse deer, Tragulus javanicus, were studied immunohistochemically. Fourteen types of endocrine cells immunoreactive for serotonin, somatostatin, enteroglucagon, pancreatic glucagon, bovine pancreatic polypeptide (BPP), gastrin, substance P, motilin, gastric inhibitory polypeptide (GIP), cholecystokinin (CCK), methionine-enkephalin-Arg6-Gly7-Leu8 (MENK-8), secretin, neurotensin, peptide tyrosine tyrosine (PYY) and chromogranin were revealed. Chromogranin-, serotonin-, somatostatin- and enteroglucagon-immunoreactive cells were detected in all regions examined, while pancreatic glucagon-immunoreactive cells, except in the proper gastric gland region, were not found in other regions of the gastrointestinal tract. Few BPP-immunoreactive cells in either the proper gastric gland or pyloric gland regions and abundant gastrin-immunoreactive cells in the pyloric gland region were observed. Restricted distributions of substance P-, GIP-, gastrin-, motilin-, CCK-, MENK-8-, secretin-, neurotensin- and BPP-immunoreactive cells in the small intestine, and BPP-, substance P-, PYY- and motilin-immunoreactive cells in the large intestine were noted. The important findings include the presence of BPP-immunoreactive cells in the abomasum, pancreatic glucagon-immunoreactive cells in the proper gastric gland region, and substance P- and motilin-immunoreactive cells in the large intestine. It is suggested that the distribution pattern of gut endocrine cells in the lesser mouse deer is more similar to that in the pig than in the domestic ruminants so far reported.
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Affiliation(s)
- S Agungpiryono
- Department of Veterinary Anatomy, Obihiro University of Agriculture and Veterinary Medicine, Japan
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22
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Greif Z, Heno N, Said N, Freundlich E. Effect of desferrioxamine on salivary iron in thalassemic children. Isr J Med Sci 1986; 22:482-3. [PMID: 3759440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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23
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Bourlard C, Said N, Miladi A, Miladi Z, Soussi M. [Work load for a health team caring for a population 0-6 years of age in an urban center in Cape Bon]. Tunis Med 1981; 59:371-5. [PMID: 7344197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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24
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Saxena BB, Saito T, Said N, Landesman R. Radioreceptorassay of luteinizing hormone-human chorionic gonadotropin in urine: detection of the luteinizing hormone surge and pregnancy. Fertil Steril 1977; 28:163-7. [PMID: 832729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A radioreceptorassay of luteinizing hormone (LH)-human chorionic gonadotropin (hCG), using plasma membranes of bovine corpora lutea, has been extended to the detection of the midcycle LH peak and subsequent pregnancy in morning and 24-hour urine samples on days 10 to 12 following ovulatiobjects as determined by radioreceptorassay and radioimmunoassay were 45 ng and 20 ng/ml of urine, respectively; in 24-hour urine samples, mean levels of 39 ng and 17 ng of LH/ml, respectively, were found. A sustained rise in hCG was detected by the radioreceptorassay from 10 to 12 days after conception, and by day 15 the hCG levels were in the range of the midcycle LH range; this finding was confirmed by the radioimmunoassay of hCG.
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