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Saad AE, Ashour DS, Rashad E. Immunomodulatory effects of chronic trichinellosis on Toxoplasma gondii RH virulent strain in experimental rats. Pathog Glob Health 2023; 117:417-434. [PMID: 36922743 PMCID: PMC10177679 DOI: 10.1080/20477724.2023.2191233] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023] Open
Abstract
Mixed parasitic infections could affect the host immunological responses and re-design the pathogenesis of each other. The impact of Toxoplasma gondii (T. gondii) and Trichinella spiralis (T. spiralis) co-infection on the immune response remains unclear. The objective of the present study was to investigate the possible effect of chronic trichinellosis on the immune response of rats infected with T. gondii virulent RH strain. Animals were divided into four groups: group I: non-infected negative control; group II: infected with T. spiralis; group III: infected with T. gondii and group IV: infected with T. spiralis then infected with T. gondii 35 days post T. spiralis infection (co-infected group). The interaction between T. spiralis and T. gondii was evaluated by histopathological examination of liver and brain tissues, immunohistochemical expression of inducible nitric oxide synthase (iNOS), and β-catenin in the brain tissues, and CD4+ and CD8+ T cells percentages, and tumor necrosis factor (TNF)-alpha expression in the spleen tissues. Along with, splenic interleukin (IL)-4 and IL-10 mRNA expression levels were measured 15 days post-Toxoplasma infection. Our study revealed that prior infection with T. spiralis leads to attenuation of Th1 response against T. gondii, including iNOS, TNF-α, and CD8+ T-cell response with improvement of the histopathological changes in the tissues. In conclusion, in the co-infected rats, a balanced immune response has been developed with the end result, improvement of the histopathological changes in the liver and brain.
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Affiliation(s)
- Abeer E. Saad
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
- Medical Parasitology sub-unit, Pathology Department, College of Medicine, Jouf University, Sakaka, Saudi Arabia
| | - Dalia S. Ashour
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Eman Rashad
- Cytology and Histology Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
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El-Masry EA, Alruwaili FM, Taha AE, Saad AE, Taher IA. Prevalence of extended-spectrum beta-lactamase-producing Enterobacteriaceae among clinical isolates in Turaif general hospital, northern borders- Saudi Arabia. J Infect Dev Ctries 2023; 17:477-484. [PMID: 37159882 DOI: 10.3855/jidc.17212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 01/24/2023] [Indexed: 05/11/2023] Open
Abstract
INTRODUCTION Enterobacteriaceae that produce extended-spectrum beta-lactamase (ESBL) are quickly spreading, posing a threat to world healthcare. METHODOLOGY 138 gram-negative bacteria were collected from different samples (stool, urine, wound, blood, tracheal aspirate, catheter tip, vaginal swab, sputum, and tracheal aspirate) from hospitalized patients. Samples were subcultured and identified in accordance with their biochemical reactions and culture characteristics. Against all the isolated Enterobacteriaceae, an antimicrobial susceptibility test was performed. VITEK®2 system, phenotypic confirmation, and Double-Disk Synergy Test (DDST) had been utilized to identify the ESBLs. RESULTS Of the 138 samples studied, the prevalence of ESBL-producing infections among the clinical samples of the present study was 26.8 % (n = 37). E. coli was the commonest ESΒL producer at 51.4% (n = 19) followed by K. pneumoniae at 27% (n = 10). The potential risk factors for the ESBL development that produces bacteria were as follows, patients with the presence of indwelling devices, previous history of hospital admission, and usage of antibiotics. ESBL is statistically (p ≤ 0.05) higher among the patients with indwelling devices, ICU admission, who had a previous hospital admission in the last 6 months as well as who was given antibiotics (quinolones and/or cephalosporins) in the last 6 months. One hundred thirty-two (95.7%) of ESBL isolates were resistant to amoxicillin, while the lowest resistance was for fosfomycin (15.2%). CONCLUSIONS ESBL-producing Enterobacteriaceae are highly prevalent in Turaif General Hospital setting with some potential risk factors. A strict policy to be made available on the usage of antimicrobials in hospitals and clinics should be established.
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Affiliation(s)
- Eman A El-Masry
- Microbiology and immunology unit, Department of Pathology, College of Medicine, Jouf University, Al-Jouf, Saudi Arabia
| | - Faisal Mansour Alruwaili
- Master's Degree in infection prevention and control, Primary health care center, Suwayr, Al-Jouf, Saudi Arabia
| | - Ahmed E Taha
- Microbiology and immunology unit, Department of Pathology, College of Medicine, Jouf University, Al-Jouf, Saudi Arabia
| | - Abeer E Saad
- Microbiology and immunology unit, Department of Pathology, College of Medicine, Jouf University, Al-Jouf, Saudi Arabia
| | - Ibrahim A Taher
- Microbiology and immunology unit, Department of Pathology, College of Medicine, Jouf University, Al-Jouf, Saudi Arabia
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Saad AE, Zoghroban HS, Ghanem HB, El-Guindy DM, Younis SS. The effects of L-citrulline adjunctive treatment of Toxoplasma gondii RH strain infection in a mouse model. Acta Trop 2023; 239:106830. [PMID: 36638878 DOI: 10.1016/j.actatropica.2023.106830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 01/04/2023] [Accepted: 01/07/2023] [Indexed: 01/12/2023]
Abstract
Toxoplasma gondii is a zoonotic intracellular protozoan parasite and its therapeutic limitations are one of its major problems. L-citrulline is an organic compound that has beneficial effects on many diseases. The purpose of this study was to assess the impact of L-citrulline, alone or in combination with sulfamethoxazole-trimethoprim (SMZ-TMP) on acute toxoplasmosis caused by Toxoplasma gondii RH virulent strain. In our study, 60 Swiss albino mice were divided into two main groups; the control group and the infected treated group, which was subdivided into group IIa: infected treated with L-citrulline, group IIb: infected treated with SMZ-TMP, and group IIc: infected treated with L-citrulline combined with SMZ-TMP. The effects of treatment were assessed by parasitological study, electron microscopic study of tachyzoites, and histopathological study of the liver. Moreover, ELISA measurement of the serum level of Interferon-gamma, Interleukin 10, Nitric oxide, and apoptotic markers was used. It was noticed that L-citrulline combined with SMZ-TMP significantly increased the survival time of infected mice with a significant decrease in the number of tachyzoites compared to the other groups. Moreover, it increased the levels of measured cytokines and serum anti-apoptotic proteins Bcl-2 and improved the extent of liver cell damage associated with a decrease in inflammatory infiltration. In conclusion, L-citrulline supplementation was found to be effective against acute toxoplasmosis, especially when combined with SMZ-TMP as it has multifactorial mechanisms; nitric oxide production, anti-inflammatory, anti-apoptotic, and immune stimulator.
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Affiliation(s)
- Abeer E Saad
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Egypt.; Medical Parasitology sub-unit, Pathology Department, College of Medicine, Jouf University, Sakaka, Saudi Arabia.
| | - Hager S Zoghroban
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Egypt
| | - Heba B Ghanem
- Clinical Laboratory Sciences Department, College of Applied Medical Sciences, Jouf University, Sakaka, Saudi Arabia; Medical Biochemistry Department, Faculty of Medicine, Tanta University, Egypt
| | - Dina M El-Guindy
- Pathology Department, Faculty of Medicine, Tanta University, Egypt
| | - Salwa S Younis
- Medical Parasitology Department, Faculty of Medicine, Alexandria University, Egypt
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Abou Rayia DM, Ashour DS, Abo Safia HS, Abdel Ghafar MT, Amer RS, Saad AE. Human umbilical cord blood mesenchymal stem cells as a potential therapy for schistosomal hepatic fibrosis: an experimental study. Pathog Glob Health 2023; 117:190-202. [PMID: 35435145 PMCID: PMC9970248 DOI: 10.1080/20477724.2022.2064795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
The objective of our study was to assess the effect of human umbilical cord blood (HUCB) mesenchymal stem cells (MSCs) transplantation on schistosomal hepatic fibrosis in mice. The study animals were divided into three groups. Group I is a control group, where the mice were infected with Schistosoma mansoni cercariae and remained untreated. The mice of the other two groups were infected and treated with either praziquantel (Group II) or HUCB-MSCs (Group III). Liver function tests, as well as histopathological evaluation of liver fibrosis using hematoxylin and eosin and Masson's trichrome stains, were performed. Additionally, an immunohistochemical study was carried out using anti-glial fibrillary acidic protein (GFAP) in hepatic stellate cells. Compared to the control group, the treated (praziquantel and MSCs) groups showed a substantial improvement, with a significant difference regarding the histopathological evaluation of liver fibrosis in the MSCs-treated group. In conclusion, MSCs could be a promising and efficient cell therapy for liver fibrosis.
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Affiliation(s)
- Dina M Abou Rayia
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Dalia S Ashour
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Hend S Abo Safia
- Pathology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | | | - Rania S Amer
- Clinical Pathology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Abeer E Saad
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Tanta, Egypt.,Medical Parasitology Sub-unit, Pathology Department, College of Medicine, Jouf University, Sakaka, Saudi Arabia
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Zoghroban HS, Ibrahim FMK, Nasef NA, Saad AE. The impact of L-citrulline on murine intestinal cell integrity, immune response, and arginine metabolism in the face of Giardia lamblia infection. Acta Trop 2022; 237:106748. [DOI: 10.1016/j.actatropica.2022.106748] [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] [Received: 08/27/2022] [Revised: 11/06/2022] [Accepted: 11/07/2022] [Indexed: 11/11/2022]
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Ali Ismail AM, Saad AE, Fouad Abd-Elrahman NA, Abdelhalim Elfahl AM. Effect of Benson's relaxation therapy alone or combined with aerobic exercise on cortisol, sleeping quality, estrogen, and severity of dyspeptic symptoms in perimenopausal women with functional dyspepsia. Eur Rev Med Pharmacol Sci 2022; 26:8342-8350. [PMID: 36459044 DOI: 10.26355/eurrev_202211_30367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
OBJECTIVE Besides repeated stress exposure, a sedentary lifestyle and low estrogen levels are risk factors for the development of functional dyspepsia (FD). The aim of this study was to find out the effect of adding aerobic exercise (5 sessions per week) to the daily application of a 40-minute Benson's relaxation therapy (BRT) (diaphragmatic breathing and progressive muscle relaxation applied for 20 minutes in the morning and evening) on Glasgow dyspepsia severity score (GDSS), cortisol, visual analogue scale (VAS) (for abdominal symptoms), estradiol (one of the endogenous estrogens), Pittsburgh sleep quality index (PSQI), and 42-item depression, anxiety, and stress scales (DASS-42) in 60 perimenopausal women with FD. PATIENTS AND METHODS Women who consumed a daily dose of pantoprazole (40 mg tablet administered as a proton pump inhibitor drug) were randomly assigned to an 8-week study group (this group received aerobic exercise plus BRT, N=30) or an 8-week control group (this group received BRT only, N=30). RESULTS Significant improvements were reported in all measured variables within women groups (except estradiol of the control group). Compared to the control group, the reported within-group significant improvements in GDSS, cortisol, VAS, PSQI, and DASS-42 were higher in the study group. CONCLUSIONS Significant improvements in GDSS, cortisol, VAS, PSQI, and DASS-42 could be achieved after adding adjunctive therapies - aerobic exercise and BRT - to the medications of FD in perimenopausal women. Compared to BRT alone, physical exercise plus BRT significantly increases the levels of estradiol in perimenopausal women with FD.
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Affiliation(s)
- A M Ali Ismail
- Department of Physical Therapy for Cardiovascular/Respiratory Disorder and Geriatrics, Faculty of Physical Therapy, Cairo University, Giza, Egypt.
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Taha AE, Al-Ruwaili NM, El-Masry EA, Saad AE, Taher IA. MRSA as an indicator of infection control measures in Turaif General Hospital, Northern Area-Saudi Arabia. J Infect Dev Ctries 2022; 16:1037-1044. [PMID: 35797299 DOI: 10.3855/jidc.16058] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 11/12/2021] [Accepted: 01/10/2022] [Indexed: 10/31/2022] Open
Abstract
INTRODUCTION Saudi Arabia can be considered a hot spot for Methicillin-resistant Staphylococcus aureus (MRSA) infections with significant regional variations. As far as we know, this is the first study to evaluate the prevalence of MRSA in clinical samples obtained from Turaif general hospital (TGH), Northern Area-Saudi Arabia, and screening the resistance profile to the most regularly used antimicrobials as an indicator for evaluation of the implemented infection control measures. METHODOLOGY Totally, 410 Samples were collected from patients in TGH with clinically suspected nosocomial infections. MRSA isolates were identified by the classical bacteriological, biochemical, and cefoxitin-based methods as recommended by the Clinical Laboratory Standard Institute. Confirmation of isolates and testing of their antimicrobial susceptibilities were performed by the automated Vitek 2 compact system. RESULTS Totally, 130 nosocomial isolates were detected. Staphylococcus aureus (29.23%) was the most frequently isolated Gram-positive pathogen. MRSA represented 39.47% of Staphylococcus aureus and 11.54% of all isolates. MRSA-causing surgical site infections were the most predominant type of MRSA nosocomial infections representing (25.00%). Recent antibiotic therapy, prolonged hospital stays, and indwelling devices were significant risk factors for the development of MRSA infections. Although all MRSA isolates were sensitive to vancomycin, teicoplanin, linezolid, Fosfomycin, and tigecycline, many isolates were resistant to other tested antimicrobials. CONCLUSIONS Hospital administrators should strengthen the ideal use of antibiotics according to the local hospital policy to control the selective drug pressure on Staphylococcus aureus strains with minimizing exposure to the risk factors by implementing the proper infection control policies.
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Affiliation(s)
- Ahmed E Taha
- Microbiology and immunology unit, Department of Pathology, College of Medicine, Jouf University, Al-Jouf, Saudi Arabia.
| | - Najeh M Al-Ruwaili
- Master's Degree in infection prevention and control, Turaif General Hospital, Northern Borders, Saudi Arabia
| | - Eman A El-Masry
- Microbiology and immunology unit, Department of Pathology, College of Medicine, Jouf University, Al-Jouf, Saudi Arabia
| | - Abeer E Saad
- Microbiology and immunology unit, Department of Pathology, College of Medicine, Jouf University, Al-Jouf, Saudi Arabia
| | - Ibrahim A Taher
- Microbiology and immunology unit, Department of Pathology, College of Medicine, Jouf University, Al-Jouf, Saudi Arabia
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Saad AE, Ashour DS, Osman EM. Different panel of toll-like receptors expression during chronic Schistosoma mansoni infection in experimental animals. Exp Parasitol 2022; 239:108317. [PMID: 35777451 DOI: 10.1016/j.exppara.2022.108317] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/13/2022] [Accepted: 06/24/2022] [Indexed: 11/18/2022]
Abstract
BACKGROUND Many studies have reported the immunomodulatory effect of helminths to avoid the lethal immunopathology. During schistosomiasis, the immune response is orchestrated by toll-like receptors (TLRs). Modulating TLRs can alter the function of antigen presentation cells with the shift of the host's Th1 response to a dominant regulatory Th2 response. The objective of our study was to clarify which TLRs are related to the immune response of chronic Schistosoma infection. METHODS The study animals were divided into two groups; group I: uninfected mice; control group and group II: Schistosoma mansoni infected mice. mRNA expression of TLR2, 3, 4, 7, and 9 in different organs (liver, large intestine, and spleen) were assessed on day 90 post-infection. RESULTS TLR gene expression has changed depending on the tissue studied as the mRNA level of TLR2, TLR7, and TLR9 were significantly upregulated in all examined organs while TLR3 expression showed only significant upregulation in the liver of infected mice. On the other hand, TLR4 expression was significantly upregulated in the liver while significantly downregulated in the large intestine. CONCLUSION This study provides a better understanding of TLRs profile in different organs against S. mansoni parasites during the chronic phase of infection.
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Affiliation(s)
- Abeer E Saad
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Egypt; Medical Parasitology Sub-unit, Pathology Department, College of Medicine, Jouf University, Sakaka, Saudi Arabia.
| | - Dalia S Ashour
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Egypt
| | - Eman M Osman
- Department of Immunology, Medical Research Institute, Alexandria University, Alexandria, Egypt
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Abaza MA, Elboraay EM, Saad AE, Zayan KA. Assessment of the role of intracloacal inoculation of live infectious bursal disease vaccine in breaking through maternally derived antibodies. Avian Pathol 2020; 49:581-588. [PMID: 32674593 DOI: 10.1080/03079457.2020.1796925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Infectious bursal disease (IBD) remains a potential worldwide threat to the poultry industry despite several vaccination approaches. Because maternally derived antibodies (MDA) constitute a critical problem for IBD vaccination, we examined the efficiency of the intracloacal vaccination approach in breaking through MDA. Experiment 1 determined the ability of the vaccinal strain to multiply in the bursa of Fabricius (BF) in chicks with a high level of MDA. Using real-time polymerase chain reaction, we quantified the strain in the bursae of vaccinated and non-vaccinated chicks. Experiment 2 was performed on three groups of chicks with high levels of MDA: group 1, non-vaccinated non-challenged; group 2, non-vaccinated challenged; and group 3, vaccinated challenged. Seroconversion to IBDV was measured using enzyme-linked immunosorbent assay. Groups 2 and 3 were challenged by vvIBDV at 25 days of age. Experiment 3 studied the effect of early IBD vaccinal strain multiplication on the immune response of vaccinated and non-vaccinated chicks to other vaccines. In experiment 1, the vaccinal strain showed progressive multiplication and reached the detectable titre in BF at 12 h post-vaccination despite high MDA titre. Experiment 2 showed that chicks in group 3 had significant seroconversion against IBDV. After challenge, group 3 showed significant improvements in several measured parameters compared with group 2. Moreover, results of experiment 3 proved that early multiplication of the vaccinal strain in the BF has no significant effect on the immune system or immune response to other vaccines. These results proved the promising success of this IBD vaccination approach.RESEARCH HIGHLIGHTS IBD vaccinal strain succeeded in multiplying in BF after intracloacal inoculation.Vaccinated chicks showed significant seroconversion of IBDV antibody titres.Vaccinated chicks showed a significant protection level against vvIBDV.Early IBD vaccination did not affect the immune response to other vaccines.
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Affiliation(s)
- M A Abaza
- Avian and Rabbit Diseases Department, Faculty of Veterinary Medicine, Benha University, Kaliobyia, Egypt
| | - E M Elboraay
- Avian and Rabbit Diseases Department, Faculty of Veterinary Medicine, Benha University, Kaliobyia, Egypt
| | - A E Saad
- Avian and Rabbit Diseases Department, Faculty of Veterinary Medicine, Benha University, Kaliobyia, Egypt
| | - K A Zayan
- Avian and Rabbit Diseases Department, Faculty of Veterinary Medicine, Benha University, Kaliobyia, Egypt
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Rashed LA, Faiz SH, Hassan MA, Elsebaie MM, Saad AE. Circulating Micro RNA 181A as Biomarker in Breast Cancer, Its Possible Association with Metastasis & Epithelial Mesenchymal Transformation. Tumori 2020. [DOI: 10.1177/0300891620914122] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background: Recent studies have reported the involvement of micro RNA 181a in diverse cellular functions. Though some studies have shown that miR-181a expression is downregulated in several human solid tumors, others have demonstrated that upregulation of miR-181a may promote metastasis and invasion of human cancers. Aim of the Study: The aim of this work is to detect the level of circulating miRNA-181a in breast cancer cases at different stages and to study its role in metastasis & epithelial mesenchymal transformation (EMT) through the possible association between miRNA 181a and transforming growth factor beta (TGFβ) signaling pathway. Subjects and Methods: The present work included 70 female patients, with breast cancer at different stages 30 patients with metastatic disease and 40 patients with non-metastatic disease 20 healthy subjects were taken as a control group. We detected miRNA-181a expression in peripheral blood with qRT PCR, and TGF-beta, SMAD-4, SNAIL-1 and Bim expression by quantitative PCR. Results: miRNA-181a, TGF-beta, SNAIL-1 and SMAD-4 were significantly upregulated in patients with metastatic breast cancer compared to patients with non-metastatic disease while Bim is significantly downregulated in metastatic versus non-metastatic group. Also, miRNA-181a was a prognostic marker for disease progression and overall survival. Conclusion: signaling pathway of TGFβ-SMAD, regulate miRNA-181a which in turn play role in stabilizing SNAIL transcription factor that promote tumor aggressiveness and metastasis through epithelial mesenchymal transition, as well as down-regulation of Bim.
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Affiliation(s)
- LA Rashed
- Department of Medical Biochemistry and Molecular Biology, faculty of medicine, Cairo university
| | - SH Faiz
- Department of Medical Biochemistry and Molecular Biology, faculty of medicine, Cairo university
| | - MA Hassan
- Department of Clinical oncology, Faculty of medicine, Cairo University
| | - MM Elsebaie
- Department of Medical Biochemistry and Molecular Biology, faculty of medicine, Cairo university
| | - AE Saad
- Department of Medical Biochemistry and Molecular Biology, faculty of medicine, Cairo university
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Ashour DS, Saad AE, El Bakary RH, El Barody MA. Can the route of Toxoplasma gondii infection affect the ophthalmic outcomes? Pathog Dis 2019; 76:5037924. [PMID: 29912329 DOI: 10.1093/femspd/fty056] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 06/12/2018] [Indexed: 11/13/2022] Open
Abstract
Ocular toxoplasmosis is the most common cause of retinochoroiditis worldwide in humans. Some studies highlighted the idea that ocular lesions differ according to the route of infection but none of them mimicked the natural route. The current study aimed to investigate the ophthalmic outcomes in congenital and oral routes of infection with Toxoplasma in experimental animals. Mice were divided into three groups; group I: congenital infection, group II: acquired oral infection and group III: non-infected. We used Me49 chronic low-virulence T. gondii strain. We found that retina is the most affected part in both modes of infections. However, the retinal changes are different and more pronounced in case of congenital infection. The congenitally infected mice showed retinal lesions e.g. total detachment of retinal pigment epithelium from the photoreceptor layer and irregular arrangement of retinal layers. More severe damage was observed in mice infected early in pregnancy. While the postnatal orally infected mice showed fewer changes. In conclusion, the routes of Toxoplasma infection affect the ophthalmic outcomes and this may be the case in human disease. Although both are vision threatening, it seems that the prognosis of postnatal acquired ocular toxoplasmosis is better than that of congenital disease.
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Affiliation(s)
- Dalia S Ashour
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Egypt, Tanta 31527, Egypt
| | - Abeer E Saad
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Egypt, Tanta 31527, Egypt
| | - Reda H El Bakary
- Histology Department, Faculty of Medicine, Tanta University, Egypt, Tanta 31527, Egypt
| | - Mohamed A El Barody
- Ophthalmology Department, National Eye Center, Cairo, Egypt, Cairo 11631 , Egypt
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Ashour DS, Saad AE, Dawood LM, Zamzam Y. Immunological interaction between Giardia cyst extract and experimental toxoplasmosis. Parasite Immunol 2017; 40. [PMID: 29130475 DOI: 10.1111/pim.12503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 06/01/2017] [Accepted: 11/07/2017] [Indexed: 12/16/2022]
Abstract
Toxoplasmosis is mostly associated with other intestinal parasitic infections especially Giardia due to shared mode of peroral infection. Toxoplasma and Giardia induce a strong T-helper 1- immune response. Our aim was to induce a protective immune response that results in significant impact on intestinal and extra-intestinal phases of Toxoplasma infection. This study was conducted in experimental animals and assessment of Giardia cyst extract effect on Toxoplasma infection was investigated by histopathological examination of small intestine and brain, Toxoplasma cyst count and iNOS staining of the brain, measurement of IFN-γ and TGF-β in intestinal tissues. Results showed that the brain Toxoplasma cyst number was decreased in mice infected with Toxoplasma then received Giardia cyst extract as compared to mice infected with Toxoplasma only. This effect was produced because Giardia cyst extract augmented the immune response to Toxoplasma infection as evidenced by severe inflammatory reaction in the intestinal and brain tissues, increased levels of IFN-γ and TGF-β in intestinal tissues and strong iNOS staining of the brain. In conclusion, Giardia cyst extract generated a protective response against T. gondii infection. Therefore, Giardia antigen will be a suitable candidate for further researches as an immunomodulatory agent against Toxoplasma infection.
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Affiliation(s)
- D S Ashour
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - A E Saad
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - L M Dawood
- Biochemistry Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Y Zamzam
- Pathology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
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Ismail HIH, Ashour DS, Saad AE. IMPACT OF IMMUNE SUPPRESSION ON HISTOPATHOLOGICAL AND IMMUNOLOGICAL PARAMETERS OF MICE EXPERIMENTALLY INFECTED WITH GIARDIA LAMBLIA. J Egypt Soc Parasitol 2017; 47:197-206. [PMID: 30157348] [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: 06/08/2023]
Abstract
Giardiasis is one of the most frequent entero-parasites worldwide; its prevalence is more common in developing countries. Giardia lamblia is considered one of the opportunistic parasites and aits clinical manifestations represent the expression of host resistance and parasite viri lence. As of chronic giardiasis cases were expected to worsen in immunosuppressed patients with development of various complications. This work assessed the histolopathological and the possible immunological effects of infection with G. lamblia in an immunosuppressed experimental animal model in comparison to immunocompetent one. Mice were divided into 4 groups;. group I: simmunocompetent (IC) mice infected with G. lamblia cysts, group II: immunosup pressed (S) mice infected with cysts, group III: uninfected immunocompetent mice and group. IV: uninfected immunosuppressed mice. From each group, small intestine was. removed for histopathological and molecular studies. Also, cyst counting in the stool of infected mice was estimated. We found that the number of G. lamblia cysts in the stool of IS mice was significantly higher than that from IC ones. Shortening of the villi was more pronounced in the IS than in IC group. Furthermore, intraepithelial lymphocytic count, goblet cell count and mast cell count were significantly decreased in the IS infected group as compared to IC ones. Expression of interleukin.6 mRNA showed high expression in IC infected mice while it was weak in IS mice. In conclusicn, the present study revealed the importance of the innate immunity presented by goblet cells, mast cells and other adaptive immunity responses; in the clearance of Giardia.
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Abou Rayia DM, Saad AE, Ashour DS, Oreiby RM. Implication of artemisinin nematocidal activity on experimental trichinellosis: In vitro and in vivo studies. Parasitol Int 2016; 66:56-63. [PMID: 27894908 DOI: 10.1016/j.parint.2016.11.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 10/28/2016] [Accepted: 11/23/2016] [Indexed: 01/05/2023]
Abstract
Benzimidazole drugs are used for treatment of trichinellosis, but they have a limited effect against encapsulated larval stages of Trichinella spiralis. Hence, there is a considerable interest in developing new anthelmintic drugs. Our aim is to investigate the possible effect of artemisinin on T. spiralis in in vitro and in vivo studies. T. spiralis worms were isolated from infected mice and transferred to 3 culture media; group I: with no drugs, group II: contained artemisinin and group III: contained mebendazole, then they were subjected to electron microscopic study. An in vivo study was done where mice were divided into three groups; group I: infected and untreated, group II: received artemisinin and group III: received mebendazole. The efficacy of treatment was assessed by adult and total larval counts, histopathological study of the small intestinal and muscle tissues and immunohistochemical staining of cyclooxygenase-2 (COX-2) and vascular endothelial growth factor (VEGF) in muscles. Adult worm teguments showed significant degeneration and destruction with both drugs. Also, significant reduction of total adult and larval counts occurred in treated groups in comparison to the control group. Histopathological examination of the small intestine and muscles showed marked improvement with reduction in the inflammatory infiltrates with both drugs. COX-2 and VEGF expressions were reduced in both treated groups with more reduction in the artemisinin-treated group. This study revealed that artemisinin has the potential to be an alternative drug against trichinellosis.
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Affiliation(s)
- Dina M Abou Rayia
- Department of Medical Parasitology, Faculty of Medicine, Tanta University, Egypt
| | - Abeer E Saad
- Department of Medical Parasitology, Faculty of Medicine, Tanta University, Egypt.
| | - Dalia S Ashour
- Department of Medical Parasitology, Faculty of Medicine, Tanta University, Egypt
| | - Radwa M Oreiby
- Department of Pathology, Faculty of Medicine, Tanta University, Egypt
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Ashour DS, Abou Rayia DM, Saad AE, El-Bakary RH. Nitazoxanide anthelmintic activity against the enteral and parenteral phases of trichinellosis in experimentally infected rats. Exp Parasitol 2016; 170:28-35. [PMID: 27585500 DOI: 10.1016/j.exppara.2016.08.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 08/14/2016] [Accepted: 08/29/2016] [Indexed: 12/26/2022]
Abstract
Most of the drugs used for the treatment of trichinellosis show a limited bioavailability and a high degree of resistance. Therefore, this study aimed to characterize the anthelmintic potential activity of nitazoxanide (NTZ) in a rat model of experimental trichinellosis. Animals were divided into three groups; group I, infected and non-treated; group II, received NTZ for three days post-infection (dpi) and group III, received NTZ 30 dpi for 14 consecutive days. Treatment efficacy was assessed by Trichinella spiralis adult and larval counts, histopathological studies of the small intestine and muscles and inducible nitric oxide synthase (iNOS) expression in the small intestine. T. spiralis adult count was reduced in NTZ -treated group (66.6%) and the larval count decreased to 68.7 and 76.7% in the early and late treatment, respectively. The infected non-treated rats showed massive inflammatory cellular infiltration in the small intestines and muscles. This inflammatory response was minor in the treated groups and was accompanied by a decrease in iNOS expression. Moreover, in group III, the larvae were replaced by homogenized substance with some destructive changes in the capsule. In conclusion, NTZ showed a promising activity against enteral and more effect in parenteral phases of trichinellosis.
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Affiliation(s)
- Dalia S Ashour
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Egypt.
| | - Dina M Abou Rayia
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Egypt
| | - Abeer E Saad
- Medical Parasitology Department, Faculty of Medicine, Tanta University, Egypt
| | - Reda H El-Bakary
- Histology Department, Faculty of Medicine, Tanta University, Egypt
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Khalil HM, Abd el Baki MH, Abd el Mawla MM, Maklad KM, Sharaf SA, Saad AE. Interleukin-4, immunoglobulin E and immunoglobulin A and resistance to re-infection with Schistosoma haematobium before and after chemotherapy. J Egypt Soc Parasitol 1999; 29:395-408. [PMID: 10605492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
The role of serum IL-4, IgE and IgA in protective immunity had been determined in 88- S. haematobium infected-individuals before and 3, 6, 9 and 12 months after treatment with a single dose of praziquantel. Before treatment, IL-4 level was found to be highly significant in all stages of infection, there was a positive correlation between IL-4 levels and egg count. Whereas serum IgE and IgA levels were significantly high in late infected group showing a negative correlation with egg count. After praziquantel treatment, IL-4 levels decreased gradually while IgE and IgA levels were significantly increased in all patients. At 9 and 12 months, viable ova were detected in 11 cases (12.5%), they were re-infected after treatment showing an increase in IL-4 levels, and a decrease in both serum IgE and IgA. These results indicate that IL-4 plays an important role in suppression of severe inflammatory responses associate with persistence of the parasitic stages. Also, serum IgE and IgA participate in protective immunity against S. haematobium infection. It may be essential to administer a second dose of praziquantel to all persons living in endemic areas who are likely to be in contact with infested water.
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Affiliation(s)
- H M Khalil
- Department of Parasitology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
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