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Conference Proceedings
Abdelhamid, M., Y Sharaf, S. Bakhoum, D. Sabry, and A. Talaat, "Circulating EPCs predicts the occurrence of major adverse cardiac events and early adverse remodeling in patients with STEMI", EUROPEAN HEART JOURNAL, OXFORD UNIV PRESS, 35, pp. 651-651, 2014.
Sabry, D., A. Osama, N Idriss, and M. Magdy, "Comparative study between the effects of human CD34+ and rat bone marrow mesenchymal stem cells on amelioration of CCL4 induced liver fibrosis", FEBS JOURNAL, France WILEY-BLACKWELL, 281, pp. 222-222, 2014.
Mazen I Naga, M. A. Amin, Dina A Algendy, ahmed i elbadry, Mai M Fawzi, Ayman R Foda, Serag M Esmat, D. Sabry, L. A. Rashed, and M. Kamal, "Effect of Hemochromatosis gene mutation on HCV response to treatment in the Egyptian population", HEPATOLOGY, WILEY-BLACKWELL, 60, pp. 931A-932A, 2014.
Omar, R. F., R. Ahmed, D. Sabry, Mahmoud Abdel Alim, Mira Atef, and N. Zayed, "Influence of Delta Virus Infection on the Clinical Spectrum, Serologic and Virologic Status in Chronic Hepatitis B Virus Genotype D", HEPATOLOGY, WILEY-BLACKWELL, 60, pp. 971A-972A, 2014.
Mazen I Naga, M. A. Amin, Dina A Algendy, ahmed i elbadry, Mai M Fawzi, Ayman R Foda, Serag M Esmat, D. Sabry, L. A. Rashed, M. Kamal, et al., "The Role Of Genetic Polymorphism Of LDL Receptor In Egyptian Population Infected With Chronic HCV, Regarding Response To Treatment", HEPATOLOGY, WILEY-BLACKWELL, 60, pp. 922A-922A, 2014.
Abdelhamid, M., D. Sabry, D Gharib, and M. Abdel Gawad, "Statin treatment increases the circulating endothelial progenitor cells and improve endothelial function in patients with coronary artery diseases", EUROPEAN HEART JOURNAL, OXFORD UNIV PRESS, 35, pp. 1154-1154, 2014.
Journal Article
Naga, M., M. Amin, D. Algendy, A. Elbadry, M. Fawzi, A. Foda, S. Esmat, D. Sabry, L. Rashed, S. Gabal, et al., " Dina Sabry [HTML] from Low-density lipoprotein receptor genetic polymorphism in chronic hepatitis C virus Egyptian patients affects treatment response", World journal of gastroenterology: WJG, vol. 21, issue 39, pp. 11141, 2015.
Abuohashish, H. M., M. M. Ahmed, D. Sabry, M. M. Khattab, and S. S. Al-Rejaie, "The ACE-2/Ang1-7/Mas cascade enhances bone structure and metabolism following angiotensin-II type 1 receptor blockade.", European journal of pharmacology, vol. 807, pp. 44-55, 2017 Apr 22. Abstract

The renin angiotensin system (RAS) regulates numerous systemic functions and is expressed locally in skeletal tissues. Angiotensin1-7 (Ang1-7) is a beneficial member of the RAS, and the therapeutic effects of a large number of angiotensin receptors blockers (ARBs) are mediated by an Ang1-7-dependent cascade. This study examines whether the reported osteo-preservative effects of losartan are mediated through the angiotensin converting enzyme2 (ACE-2)/Ang1-7/Mas pathway in ovariectomized (OVX) rats. Sham and OVX animals received losartan (10mg/kg/d p.o.) for 6 weeks. A specific Mas receptor blocker (A-779) was delivered via mini-osmotic pumps during the losartan treatment period. Serum and urine bone metabolism biomarker levels were measured. Bone trabecular and cortical morphometry were quantified in distal femurs, whereas mineral contents were estimated in ashed bones, serum and urine. Finally, the expression of RAS components, the receptor activator of NF-κB ligand (RANKL) and osteoprotegerin (OPG) was determined. Losartan significantly improved the elevated bone metabolism marker levels and altered trabecular and cortical structures in OVX animals, and restored normal urinary and skeletal mineral levels. Mas receptor inhibition significantly abolished all osteo-protective effects of losartan and enhanced the deleterious effects of OVX. Losartan enhanced OVX-induced up-regulation of ACE-1, AngII, angiotensin type 1 (AT1) receptor and RANKL expression, and increased ACE-2, Ang1-7, Mas and OPG expression in OVX animals. However, A-779 significantly eradicated the effects of losartan on RAS components and RANKL/OPG expression. Thus, Ang1-7 are involved in the osteo-preservative effects of losartan via Mas receptor, which may add therapeutic value to this well-known antihypertensive agent.

Abuohashish, H. M., M. M. Ahmed, D. Sabry, M. M. Khattab, and S. S. Al-Rejaie, "ACE-2/Ang1-7/Mas cascade mediates ACE inhibitor, captopril, protective effects in estrogen-deficient osteoporotic rats.", Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie, vol. 92, pp. 58-68, 2017 May 19. Abstract

The local role of the renin angiotensin system (RAS) was documented recently beside its conventional systemic functions. Studies showed that the effector angiotensin II (AngII) alters bone health, while inhibition of the angiotensin converting enzyme (ACE-1) preserved these effects. The newly identified Ang1-7 exerts numerous beneficial effects opposing the AngII. Thus, the current study examines the role of Ang1-7 in mediating the osteo-preservative effects of ACEI (captopril) through the G-protein coupled Mas receptor using an ovariectomized (OVX) rat model of osteoporosis. 8 weeks after the surgical procedures, captopril was administered orally (40mgkg(-1) d(-1)), while the specific Mas receptor blocker (A-779) was delivered at infusion rate of 400ngkg(-1)min(-1) for 6 weeks. Bone metabolic markers were measured in serum and urine. Minerals concentrations were quantified in serum, urine and femoral bones by inductive coupled plasma mass spectroscopy (ICP-MS). Trabecular and cortical morphometry was analyzed in the right distal femurs using micro-CT. Finally, the expressions of RAS peptides, enzymes and receptors along with the receptor activator of NF-κB ligand (RANKL) and osteoprotegerin (OPG) were determined femurs heads. OVX animals markedly showed altered bone metabolism and mineralization along with disturbed bone micro-structure. Captopril significantly restored the metabolic bone bio-markers and corrected Ca(2+) and P values in urine and bones of estrogen deficient rats. Moreover, the trabecular and cortical morphometric features were repaired by captopril in OVX groups. Captopril also improved the expressions of ACE-2, Ang1-7, Mas and OPG, while abolished OVX-induced up-regulation of ACE-1, AngII, Ang type 1 receptor (AT1R) and RANKL. Inhibition of Ang1-7 cascade by A-779 significantly eradicated captopril protective effects on bone metabolism, mineralization and micro-structure. A-779 also restored OVX effects on RANKL expression and ACE-1/AngII/AT1R cascade and down-regulated OPG expression and ACE-2/Ang1-7/Mas pathway. In line with the clinical observations of the bone-preservative properties following ACE-1 inhibition, local activation of ACE-2/Ang1-7/Mas signaling and suppressed osteoclastogenesis seem responsible for the osteo-preservative effect of captopril, which could offers a potential therapeutic value in treatment of disabling bone and skeletal muscular diseases.

Ebrahim, N., A. A. Dessouky, O. Mostafa, A. Hassouna, M. M. Yousef, Y. Seleem, E. A. E. A. M. El Gebaly, M. M. Allam, A. S. Farid, B. A. Saffaf, et al., "Adipose mesenchymal stem cells combined with platelet-rich plasma accelerate diabetic wound healing by modulating the Notch pathway.", Stem cell research & therapy, vol. 12, issue 1, pp. 392, 2021. Abstract

BACKGROUND: Diabetic foot ulceration is a serious chronic complication of diabetes mellitus characterized by high disability, mortality, and morbidity. Platelet-rich plasma (PRP) has been widely used for diabetic wound healing due to its high content of growth factors. However, its application is limited due to the rapid degradation of growth factors. The present study aimed to evaluate the efficacy of combined adipose-derived mesenchymal stem cells (ADSCs) and PRP therapy in promoting diabetic wound healing in relation to the Notch signaling pathway.

METHODS: Albino rats were allocated into 6 groups [control (unwounded), sham (wounded but non-diabetic), diabetic, PRP-treated, ADSC-treated, and PRP+ADSCs-treated groups]. The effect of individual and combined therapy was evaluated by assessing wound closure rate, epidermal thickness, dermal collagen, and angiogenesis. Moreover, gene and protein expression of key elements of the Notch signaling pathway (Notch1, Delta-like canonical Notch ligand 4 (DLL4), Hairy Enhancer of Split-1 (Hes1), Hey1, Jagged-1), gene expression of angiogenic marker (vascular endothelial growth factor and stromal cell-derived factor 1) and epidermal stem cells (EPSCs) related gene (ß1 Integrin) were assessed.

RESULTS: Our data showed better wound healing of PRP+ADSCs compared to their individual use after 7 and 14 days as the combined therapy caused reepithelialization and granulation tissue formation with a marked increase in area percentage of collagen, epidermal thickness, and angiogenesis. Moreover, Notch signaling was significantly downregulated, and EPSC proliferation and recruitment were enhanced compared to other treated groups and diabetic groups.

CONCLUSIONS: These data demonstrated that PRP and ADSCs combined therapy significantly accelerated healing of diabetic wounds induced experimentally in rats via modulating the Notch pathway, promoting angiogenesis and EPSC proliferation.

Safwat, A., D. Sabry, A. Ragiae, E. Amer, R. H. Mahmoud, and R. M. Shamardan, "Adipose mesenchymal stem cells-derived exosomes attenuate retina degeneration of streptozotocin-induced diabetes in rabbits.", Journal of circulating biomarkers, vol. 7, pp. 1849454418807827, 2018 Jan-Dec. Abstract

This study aimed to evaluate the effect of mesenchymal stem cells (MSCs)-derived exosomes in retina regeneration of experimentally induced diabetes mellitus (DM) in a rabbit model. Exosomes are extracellular vesicles that contain many microRNAs (micRNAs), mRNAs, and proteins from their cells of origin. DM was induced by intravenous (IV) injection of streptozotocin in rabbits. MSCs were isolated from adipose tissue of rabbits. Exosomes were extracted from MSCs by ultracentrifugation. Exosomes were injected by different routes (IV, subconjunctival (SC), and intraocular (IO)). Evaluation of the treatment was carried out by histopathological examination of retinal tissues and assessment of micRNA-222 expression level in retinal tissue by real-time polymerase chain reaction. Histologically, by 12 weeks following SC exosomal treatment, the cellular components of the retina were organized in well-defined layers, while IO exosomal injection showed well-defined retinal layers which were obviously similar to layers of the normal retina. However, the retina appeared after IV exosomal injection as irregular ganglionic layer with increased thickness. MicRNA-222 expression level was significantly reduced in diabetic controls when compared to each of healthy controls and other diabetic groups with IV, SC, and IO routes of injected exosomes (0.06 ± 0.02 vs. 0.51 ± 0.07, 0.28 ± 0.08, 0.48 ± 0.06, and 0.42 ± 0.11, respectively). We detected a significant negative correlation between serum glucose and retinal tissue micRNA-222 expression level ( = -0.749, = 0.001). We can associate the increased expression of micRNA-222 with regenerative changes of retina following administration of MSCs-derived exosomes. The study demonstrates the potency of rabbit adipose tissue-derived MSCs exosomes in retinal repair. So, exosomes are considered as novel therapeutic vectors in MSCs-based therapy through its role in shuttling of many factors including micRNA-222.

Ebrahim, N., Y. M. H. Mandour, A. S. Farid, E. Nafie, A. Z. Mohamed, M. Safwat, R. Taha, D. Sabry, S. M. Sorour, and A. Refae, "Adipose Tissue-Derived Mesenchymal Stem Cell Modulates the Immune Response of Allergic Rhinitis in a Rat Model.", International journal of molecular sciences, vol. 20, issue 4, 2019 Feb 18. Abstract

This study was designed to investigate the potential effects and underlying mechanism of adipose tissue-derived mesenchymal stem cells (MSCs) on allergic inflammation compared to Montelukast as an antileukotriene drug in a rat model of allergic rhinitis (AR). The effect of MSCs was evaluated in albino rats that were randomly divided into four (control, AR, AR + Montelukast, and AR + MSCs) groups. Rats of AR group were sensitized by ovalbumin (OVA) and then challenged with daily nasal drops of OVA diluted in sterile physiological saline (50 μL/nostril, 100 mg/mL, 10% OVA) from day 15 to day 21 of treatment with/without Montelukast (1 h before each challenge) or MSCs I/P injection (1 × 10⁶ MCSs; weekly for three constitutive weeks). Both Montelukast and MSCs treatment started from day 15 of the experiment. At the end of the 5th week, blood samples were collected from all rats for immunological assays, histological, and molecular biology examinations. Both oral Montelukast and intraperitoneal injection of MSCs significantly reduced allergic symptoms and OVA-specific immunoglobulin E (IgE), IgG1, IgG2a and histamine as well as increasing prostaglandin E2 (PGE2). Further analysis revealed that induction of nasal innate cytokines, such as interleukin (IL)-4 and TNF-α; and chemokines, such as CCL11 and vascular cell adhesion molecule-1 (VCAM-1), were suppressed; and transforming growth factor-β (TGF-β) was up-regulated in Montelukast and MSCs-treated groups with superior effect to MSCs, which explained their underlying mechanism. In addition, the adipose tissue-derived MSCs-treated group had more restoring effects on nasal mucosa structure demonstrated by electron microscopical examination.

Abuohashish, H. M., M. M. Ahmed, D. Sabry, M. M. Khattab, and S. S. Al-Rejaie, "Angiotensin (1-7) ameliorates the structural and biochemical alterations of ovariectomy-induced osteoporosis in rats via activation of ACE-2/Mas receptor axis.", Scientific reports, vol. 7, issue 1, pp. 2293, 2017 May 23. Abstract

The local and systemic renin angiotensin system (RAS) influences the skeletal system micro-structure and metabolism. Studies suggested angiotensin 1-7 (Ang(1-7)) as the beneficial RAS molecule via Mas receptor activation. This study examines the function of Ang(1-7) in bone micro-architecture and metabolism in an ovariectomized (OVX) rodent model of osteoporosis. OVX rats showed structural and bone metabolic degeneration in parallel with suppressed expressions of the angiotensin converting enzyme-2 (ACE-2)/Ang(1-7)/Mas components. The infusion of Ang(1-7) markedly alleviated the altered bone metabolism and significantly enhanced both trabecular (metaphyseal) and cortical (metaphyseal-diaphyseal) morphometry. Urinary and bones minerals were also improved in OVX rats by Ang(1-7). The infusion of the heptapeptide enhanced ACE-2/Mas receptor expressions, while down-regulated AngII, ACE, and AngII type-1 receptor (AT1R) in OVX animals. Moreover, Ang(1-7) markedly improved osteoprotegerin (OPG) and lowered receptor activator NF-κB ligand (RANKL) expressions. The defensive properties of Ang(1-7) on bone metabolism, structure and minerals were considerably eradicated after blockage of Mas receptor with A-779. Ang(1-7)-induced up-regulated ACE-2/Ang(1-7)/Mas cascade and OPG expressions were abolished and the expressions of ACE/AngII/AT1R and RANKL were provoked by A-779. These findings shows for the first time the novel valuable therapeutic role of Ang(1-7) on bone health and metabolism through the ACE-2/Mas cascade.

Sabry, D., O. O. Abdelaleem, A. M. El Amin Ali, R. A. Mohammed, N. D. Abdel-Hameed, A. Hassouna, and W. A. Khalifa, "Anti-proliferative and anti-apoptotic potential effects of epigallocatechin-3-gallate and/or metformin on hepatocellular carcinoma cells: in vitro study.", Molecular biology reports, 2019 Feb 01. Abstract

The effects of epigallocatechin-3-gallate (EGCG) and metformin single treatment have been tested against hepatocellular carcinoma (HCC). This study aimed to assess the combination effects of EGCG and metformin on proliferation and apoptosis of HepG2cells and identified new potential molecular targets. The effect of EGCG and metformin against cell proliferation in HepG2 was determined using MTT assay. Reverse transcription polymerase chain reaction was applied to examine the gene expression of cyclin D1, lncRNA-AF085935, caspase-3, survivin and VEGF. The level of protein expression of glypican-3 was assessed by western blot. In HepG2 cells, EGCG and metformin combination treatment exhibited high significant effect against tumor proliferation. It significantly reduced cyclin D1, lncRNA-AF085935, glypican-3 and promoted apoptosis through increasing caspase3 and decreasing survivin compared to control cells. Moreover, EGCG and metformin treated cells showed decreased expression levels of VEGF. Our study provided new insights of the anticarcinogenic effects of EGCG and metformin on HCC through their effects on glypican-3 and lncRNA-AF085935.

Ali, M. M., S. A. Khater, A. A. Fayed, D. Sabry, and S. F. Ibrahim, "Apoptotic endocrinal toxic effects of perchlorate in human placental cells.", Toxicology reports, vol. 8, pp. 863-870, 2021. Abstract

Background: Perchlorate is a strong oxidizing agent and has many adverse health effects. This study investigated the potential oxidative, apoptotic, and endocrinal toxic effects of perchlorate in human placenta-derived mesenchymal stem cells (HP-MSCs).

Methods: HP-MSCs were treated with two doses of perchlorate (5 and 15 μg/L) for three days. The perchlorate's effects were detected by histopathological examination, aromatase/CYP19 A1 activity, reactive oxygen species production (ROS), and Caspase-3 expression.

Results: The highest perchlorate concentration (15 μg/L) caused significant placental histopathological changes. The placental cell viability was significantly affected by a significant increase in ROS generation; caspase-3 expression, and a significant reduction of CYP 19 activity. Despite the slight induction effect of the lowest perchlorate concentration (5 μg/L) on caspase 3 expression, CYP 19 activity, and ROS generation, it did not affect placental cellular viability.

Conclusion: This study suggested that perchlorate could modulate aromatase activity and placental cytotoxicity. The continuous monitoring of the actual perchlorate exposure is needed and could be cost-effective.

Elsetohy, K. A., M. A. S. Al-Ghussein, D. Sabry, A. M. Nada, A. A. Eldaly, and A. H. Wahba, "ARE RENALASE RS2576178 AND RS10887800 POLYMORPHISMS ASSOCIATED WITH PREGNANCY INDUCED HYPERTENSION?", WORLD JOURNAL OF PHARMACY AND PHARMACEUTICAL SCIENCES, vol. 3, issue 8, pp. 177-192, 2014.
Mostafa, T., H. Fouad, N. Nabil, L. Rashed, D. Sabry, K. Abougabal, and B. S. Gendy, "Aryl hydrocarbon receptor (AhR) rs2066853 gene polymorphism association with infertile oligoasthenoteratozoospermic men and seminal oxidative stress.", Environmental science and pollution research international, 2017 Feb 04. Abstract

This study aimed to assess the association between aryl hydrocarbon receptor (AhR) rs2066853 gene polymorphism with infertile oligoasthenoteratozoospermic (OAT) men and seminal oxidative stress (OS). A total of 170 Egyptian men were allocated according to their semen analysis into fertile normozoospermic controls (n = 50) and infertile OAT men (n = 120). They were subjected to history taking, clinical examination, semen analysis, estimation of seminal glutathione peroxidase (GPx), and malondialdehyde (MDA). AhR rs2066853 gene polymorphism was identified in the blood by PCR-RFLP. Comparing infertile OAT men with fertile controls, AhR rs2066853 genotypes showed decreased prevalence for wild homozygous genotype GG (35.8 vs 56%) and for heterozygous genotype GA (17.5 vs 30%) and an increased prevalence for homozygous genotype AA (46.7 vs 14%). Distribution of alleles of AhR rs2066853 among OAT men compared with fertile men showed decreased prevalence of G allele (44.6 vs 71%) and an increased prevalence of A allele (55.4 vs 29%). Seminal MDA demonstrated significant increase whereas seminal GPx demonstrated significant decrease in cases with AA and GA/AA genotypes compared to cases with GG genotype. It is concluded that there is a significant association between AhR rs2066853 genotype polymorphism with decreased sperm parameters as well as increased seminal oxidative stress in infertile OAT men.

Aziz, A. E., M. Talaat, F. M. Al-Asmar, T. Mostafa, H. Atta, L. Rashed, D. Sabry, S. Ashour, and A. T. Abdel Aziz, "Assessment of heme oxygenase-1 (HO-1) activity in the cavernous tissues of sildenafil citrate-treated rats", Asian journal of andrology, vol. 9, no. 3: Wiley Online Library, pp. 377–381, 2007. Abstract
Behiry, E. G., M. A. Al-Azzouny, D. Sabry, O. G. Behairy, and N. E. Salem, "Association of NKX2-5, GATA4, and TBX5 polymorphisms with congenital heart disease in Egyptian children.", Molecular genetics & genomic medicine, pp. e612, 2019 Mar 04. Abstract

BACKGROUND: Several genes encoding transcription factors are known to be the primary cause of congenital heart disease. NKX2-5 and GATA4 were the first congenital heart disease-causing genes identified by linkage analysis. This study designed to study the association of five single-nucleotide variants of NKX2-5, GATA4, and TBX5 genes with sporadic nonsyndromic cases of a congenital cardiac septal defect in Egyptian children.

METHODS: Venous blood samples from 150 congenital heart disease children (including a ventricular septal defect, atrial septal defect, tetralogy of Fallot, and patent ductus arteriosus) and 90 apparently healthy of matched age and sex were studied by polymerase chain reaction followed by direct sequencing in order to study two single-nucleotide variants of NKX2-5 (rs2277923, rs28936670), two single-nucleotide variants of GATA4 (rs368418329, rs56166237) and one single-nucleotide variant TBX5 (rs6489957). The distribution of genotype and allele frequency in the congenital heart diseases (CHD) group and control group were analyzed.

RESULTS: We found different genotype frequencies of the two variants of NKX2-5, as CT genotype of rs2277923 was present in 58% and 36% in cases and control respectively, and TT genotype present in 6% of the cases. Also regarding missense variant rs28936670, heterozygous AG presented in 82% of the cases. Also, we observed a five prime UTR variant rs368418329, GT (42% of the cases) and GG (46% of the cases) genotypes showed the most frequent presentation in cases. While regarding a synonymous variant rs56166237, GT and GG were the most presented in cases (41.4%, 56% respectively) in contrast to control group (20%, 1.7% respectively). Also, a synonymous variant in TBX5, the distribution of genotype frequency was significantly different between the CHD group and control group. CT genotype of TBX5 -rs6489957 was found in 12 ASD, 24 VSD, six PDA, three aortic coarctation and nine fallot that represent 42% of the cases.

CONCLUSIONS: Significantly higher frequency of different allelle of five variants was observed in cases when compared to the control group, with significant risky effect for the development of septal defect. In addition to two polymorphisms of NKX2-5 (rs2277923, rs28936670) variant in the cardiac septal defect, two variants in GATA4 (rs368418329, rs56166237) and one variant in TBX5 (rs6489957) seem to have a role in the pathogenesis of congenital heart disease.

Sabry, D., S. R. Kaddafy, A. A. Abdelaziz, A. K. Nassar, M. M. Rayan, S. M. Sadek, and A. A. Abou-Elalla, "Association of SIRT-1 Gene Polymorphism and Vitamin D Level in Egyptian Patients With Rheumatoid Arthritis.", Journal of clinical medicine research, vol. 10, issue 3, pp. 189-195, 2018 Mar. Abstractsirt_1_vitamin_d_polymorphism.pdf

Background: We investigated SIRT-1 genetic variant and its association with vitamin D level in Egyptian patients with rheumatoid arthritis (RA).

Methods: Seventy Egyptian subjects were enrolled in our study and divided into two groups: RA group (n = 50 patients) and healthy control group (n = 20 subjects). Five milliliter blood sample was withdrawn from each subject followed by laboratory investigation and DNA extraction for SIRT-1 gene polymorphism assessment (rs7895833 A>G, rs7069102 C>G and rs2273773 C>T) and vitamin D level expression.

Results: There was statistically significant difference between rheumatoid cases and controls with regard to vitamin D level with 88% of cases showing insufficient vitamin D versus all controls showing sufficient level. SIRT-1 different SNPs rs2273773, rs7895833and rs7069102 genotype frequencies were statistically significant in RA compared to control group (P = 0.001). There was no statistically significant difference between different genotypes of rs2273773, rs7895833 and rs7069102 with regard to vitamin D level.

Conclusion: We concluded that there is a strong association between SIRT-1 polymorphism genotyping and RA. Vitamin D level was insufficient in Egyptian patients with RA.

Bawazeer, S., D. Sabry, R. H. Mahmoud, H. M. Elhanbuli, N. N. Yassen, and M. N. Abdelhafez, "Association of SPARC gene polymorphisms rs3210714 and rs7719521 with VEGF expression and utility of Nottingham Prognostic Index scoring in breast cancer in a sample of Egyptian women.", Molecular biology reports, vol. 45, issue 6, pp. 2313-2324, 2018 Dec. Abstract

Breast cancer is the most common malignancy in women. To our knowledge, there is no single study conducted on the role of secreted protein acidic and rich in cysteine (SPARC) gene polymorphism in breast cancer risk or prognosis. The present study aims to investigate the probable role of SPARC genetic polymorphisms in development of breast cancer; their correlation with immunohistochemical expression of VEGF; and their association with breast cancer prognosis in the Egyptian population. The study sample included 238 Egyptian females who were divided into two groups: breast cancer group (118 patients) and healthy control group (120 subjects). SPARC gene single nucleotide polymorphisms rs3210714 and rs7719521 were genotyped. Allelic and genotypic frequencies were determined in both groups and association with ductal breast carcinoma, clinicopathological and prognostic characters were determined. For SPARC rs3210714, a significant difference was observed in the codominant model and both A and G alleles' frequencies between breast cancer patients and control group (P < 0.001). For rs7719521, a significant difference in codominant and dominant models as well as in both A and C alleles' frequencies between breast cancer and control groups (P < 0.001) was observed. A significant relation was found between SPARC rs3210714 and rs7719521, and immunohistochemical expression of VEGF (P = 0.046 and P = 0.027, respectively). SPARC rs7719521 showed a significant association with Nottingham Prognostic Index (NPI) (P = 0.032). The present study revealed that SPARC rs3210714 and rs7719521 polymorphisms are associated with breast cancer risk and its prognosis. Therefore, these SNPs may be useful in predicting the increased risk of breast cancer.

D, S., A. R, A. S, Fathy W, Eldemery A, and E. A, "Braf, Kras and Helicobacter pylori epigenetic changes-associated chronic gastritis in Egyptian patients with and without gastric cancer.", World journal of microbiology and biotechnology, vol. 32, issue 6, pp. 92, 2016.
Gaafar, T., W. Attia, S. Mahmoud, D. Sabry, O. AbdElAziz, D. I. N. A. RASHEED, and H. Hamza, "Cardioprotective Effects of Wharton Jelly Derived Mesenchymal Stem Cell Transplantation in a Rodent Model of Myocardial Injury.", International journal of stem cells, vol. 10, issue 1, pp. 48-59, 2017 May 30. Abstract

Background: Whartons jelly-derived mesenchymal stem cells are a valuable alternative source that possess multipotent properties, easy to obtain and available in large scale compared to BMMSCs. We investigated the possibility of cardiac function improvement post isoproterenol induced cardiac injury in a rat model following human WJMSCs transplantation.

Materials and Methods: MSCs were extracted and cultured from cord WJ, characterized by morphology, Immunophenotyping and differentiation to osteoblast and adipocytes. WJMSCs were labeled with PKH2 linker dye. Wistar rats were divided into control group, ISO group (injected with 2 doses of isoproterenol) to induce myocardial injury and ISO group transplanted with labelled WJMSCs. ECG, electrocardiographic patterns, cardiac marker enzymes, tracing of labeled MSCs and immunohistochemical analysis of myocardial cryosections were studied.

Results and Conclusions: WJ derived MSCs were expanded for more than 14 passages while maintaining their undifferentiated state, were positive for MSC markers and were able to differentiate into adipocyte and osteoblast. We demonstrated that intravenously administered WJMSCs were capable of homing predominently in the ischemic myocardium. Cardiac markers were positively altered in stem cell treated group compared to ISO group. ECG and ECHO changes were improved with higher survival rate. WJMSCs could differentiate into cardiac-like cells (positive for cardiac specific proteins) in vivo. WJMSCs infusion promoted cardiac protection and reduced mortality, emphasizing a promising therapeutic role for myocardial insufficiency.