Day 2 :
Keynote Forum
Vojin Rakić
Center for the Study of Bioethics- University of Belgrade, Serbia
Keynote: What is involuntary moral enhancement?
Time : 09:30-10:30
Biography:
Abstract:
Keynote Forum
Meena Upadhyaya
Cardiff University, UK
Keynote: Recent developments in neurofibromatosis type 1 and RASopathies: Novel therapeutic targets
Time : 11:00-12:00
Biography:
Abstract:
- Human Genetics | Gene Mutation | Genetic Diseases | Cancer Genetics | DNA Sequencing | Medical Genetics | Stem Cell Therapy | Bioinformatics and Computational Biology | Genome Editing | Sickle Cell Anemia | Genomics | Regenerative Medicine
Location: Radisson Blu Hotel Hall 1
Session Introduction
Asma M Alshammari
Al-Ghad International College, Saudi Arabia
Title: Massively parallel next generation sequencing to investigate the cis-acting genetic modifiers of somatic instability in Huntington’s disease
Time : 11:30-12:00
Biography:
Abstract:
Mariam Fida
Al Jawhara Center, Bahrain
Title: Allele amplification failure in the HBB gene due to allelic dropout in a pre-preimplantation genetic testing case
Time : 12:00-12:30
Biography:
Abstract:
Beta-Thalassemia is one of the common autosomal recessive inherited genetic conditions in the GCC region due to increased rates of consanguinity. It is a condition caused by several different types of mutations in the HBB gene. The current case represents a 30-year old gentleman who was informed to be a heterozygous carrier of β-thalassemia. At the clinic, peripheral blood was drawn for DNA sequencing. Although the patient indicated that he was a carrier, sequencing results surprisingly showed him to be affected with the codon 39 mutation which does not correspond at the genotype-phenotype level indicating the possibility of an allele dropout. Further analysis was carried out using two different sets of designed primers to confirm the carrier status. This showed that the gentleman is indeed a carrier of β-thalassemia at codon 39 of the HBB gene. In conclusion, to overcome and minimize the incidence of an allele dropout event in the pre-PGT setting and during PGT-M, it is advisable to detect every mutation using at least two different sets of primers to avoid unknown SNPs around the mutation region
Hilde Van Esch
Katholieke Universiteit Leuven, Belgium
Title: Modelling neuro developmental disorders in a dish
Time : 12:30-01:00
Biography:
Hilde Van Esch has completed her PhD from Katholieke Universiteit Leuven, Belgium. She has then pursued Post-doc at Institut Cochin in Paris on X-linked intellectual disability. She currently works as a Clinical Geneticist at the University Hospitals UZ Leuven and is Associate Professor in the Department of Human Genetics and Head of the Laboratory of Genetics of Cognition at the University of Leuven, Belgium. Her research interests includes the identification of genes involved in rare diseases and intellectual disability. She has published and coauthered more than 170 papers in reputed journals and is a Board Member of the European Society of Human Genetics.
Abstract:
The leading manifestation of brain dysfunction is intellectual disability, affecting approximately 3% of the general population. Given the uniqueness and the complexity of human cognition and behavior, studies in humans are essential to understand the role of the multitude of genes involved in these processes. We previously developed IPSC from patients with MECP2 duplication syndrome carrying different duplication sizes, to study the impact of increased MePC2 dosage in human neurons. MECP2 duplication syndrome is a severe neurodevelopmental disorder in males, characterized by severe neurodevelopmental delay with onset at birth, limited or absent speech, hypotonia, epilepsy, autism and motor dysfunction. Cortical neurons derived from Mecp 2dup-iPSCs had more synapses and altered network synchronization as well as dendritic complexity. Next, we tested a series of epigenetic drugs for the ability to rescue neuronal defects and validated two HDAC inhibitors as potential clinical candidates. We are currently developing an iPSC model for a novel tubulinopathy, characterized by intellectual disability associated with characteristic dysmorphic signs: circumferential skin creases, cleft palate, facial dysmorphisms and short stature. This developmental disorder is caused by mutations in a novel gene, MAPRE2 (Microtubule-Associated Protein Member 2) encoding a member of the EB family. We derived patient-specific induced Pluripotent Stem Cell (iPSC) and established isogenic rescue lines as well as patient specific knock-in lines using CRISPR/CAS9. These iPSC’s are then differentiated towards Neural Progenitor Cells (NPC), cortical neurons and Cranial Neural Crest Cells (CNCC) using adapted and optimized differentiation protocols. Preliminary functional experiments using patient fibroblasts showed an increase in migration speed and overall mitosis duration. We will now perform similar experiments to analyze the mitosis and migration rate of iPSC derived NPC’s and CNCC’s. In addition a full morphological work-up is ongoing. We will present these novel data at the meeting.
Manisha Mishra
All India Institute of Medical Sciences, India
Title: Association of MMP2 polymorphisms in preeclampsia Manisha Mishra
Time : 14:00-14:30
Biography:
Manisha Mishra had completed Bachelor of Dental Surgery and MSc Anatomy from All India Institute of Medical Sciences, New Delhi, India. She is currently a Senior Reseach Fellow at All India Institute of Medical Sciences, India.
Abstract:
Background & Aim: Imbalanced Matrix Metalloproteinase (MMP) expression, including MMP-2, has been demonstrated in pre-eclampsia. However, little is known about the effect of MMP-2 gene polymorphisms on hypertensive disorders of pregnancy. Therefore, we examined Matrix Metalloproteinase (MMP-2) gene polymorphisms (g.-735C/T) and its association with Preeclampsia (PE) and measured the levels of MMP-2 serum concentrations in PE. Method: 30 preeclamptic and 30 healthy pregnant women were enrolled from department of obstetrics and gynaecology, AIIMS, New Delhi after getting approval from Institute ethical committee. Genomic DNA was extracted from blood and amplified by PCR. MMP2 gene polymorphisms of -735C/T was detected by Restriction Fragment Length Polymorphism (RFLP). The levels of MMP2 in sera were measured by ELISA. Result: The maternal serum MMP2 levels was found to be more in PE patients than in control group (p=0.03). The increased frequency of CT genotype for MMP2 (-735C/T) Single Nucleotide Polymorphism was seen in PE patients as compared to control group. However the difference in genotype frequency was not statistically significant (p=0.35). Conclusion: These findings may help to understand the relevance of MMP-2 and its genetic polymorphisms to the pathophysiology of hypertensive disorders of pregnancy like preeclampsia and IUGR.
Sarah Sabir
Kinnaird College for Women, Pakistan
Title: Molecular characterization of families affected with autosomal recessive primary microcephaly
Time : 14:30-15:00
Biography:
Abstract:
Statement of the Problem: Cousin Marriage is very common in part of world and there have been proven association with the degree of consanguineous marriages and prevalence of autosomal recessive genetic disorders. It is reported that 60% of cousin marriages in Pakistan is the subject of prevalence of most rare genetic disorders in our population. Microcephaly which is present at birth and causes non-progressive mental retardation is called autosomal recessive primary microcephaly (MCPH), whereas which develops postnatally is secondary microcephaly. It is a neurogenic mitotic disorder which results in small brain size compared to one third of normal brain. Affected patients have normal neuronal migration, neuronal apoptosis and neuronal function. Sixteen MCPH loci have been reported by different scientist from various populations around the world containing the following genes Microcephalin, WDR62, CDKRAP2, CASC, ASPM, CENPJ, STIL, CEPH135, CEPH152, ZNF335, PHC1, CDK6, CENPE, SAS6, MFSD2A and ANKLE2. Mutations in any one of the gene will lead to disease phenotype due to premature chromosomal condensation, disturbed mitotic spindle orientation, signaling response as a result of DNA damage. Methodology & Theoretical Orientation: In the current study, the molecular genetics of five families affected with autosomal recessive primary microcephaly from Pakistani origin were studied. By taking the head circumference of the affected individual these families were identified from different cities of Pakistan. Clinical information was collected with the help of a carefully designed questionnaire. Venous blood sample of the affected families was collected and genomic DNA was extracted using standard phenol-chloroform method. Four loci i.e. MCPH5 (ASPM), MCPH2 (WDR62), MCPH1 (Microcephalin) and MCPH6 (CENPJ) were selected for initial screening bring the most prevalent loci reported from Pakistan. Linkage analysis of the affected families was done by Polymerase Chain Reaction (PCR) using specific microsatellite markers flanking the selected gene. 8% native Polyacrylamide Gel (PAGE) was used to identify PCR results. Conclusion & Significance: Five families affected with autosomal recessive primary microcephaly were mentioned in this study. These families were screened for ASPM, WDR62, CENPJ genes. These families showed no linkage to the initial screening done for the three most prevalent loci reported from this region. Hence, it can be concluded that disease phenotype in these families is apparently not due to mutations in these three genes, however further screening using more markers and mutation screening of these families will give confirmed results. The aim of this study is to elucidate the molecular genetics of this disorder in five affected families. Linkage analysis will be initially done followed by mutations screening of the families linking to any of the known loci. The current project will enable us to offer carrier screening and genetic counseling, which will be our meager contribution towards reducing the prevalence of this disease our parent population. Results: The gel analysis revealed that two of the families are linked with ASPM gene, whereas the rest of three were not found linked with ASPM, WDR62, CENPJ and Microcephalin genes.
Sarah Sabir
Kinnaird College for Women, Pakistan
Title: Molecular characterization of families affected with autosomal recessive primary microcephaly
Biography:
Abstract:
Statement of the Problem: Cousin Marriage is very common in part of world and there have been proven association with the degree of consanguineous marriages and prevalence of autosomal recessive genetic disorders. It is reported that 60% of cousin marriages in Pakistan is the subject of prevalence of most rare genetic disorders in our population. Microcephaly which is present at birth and causes non-progressive mental retardation is called autosomal recessive primary microcephaly (MCPH), whereas which develops postnatally is secondary microcephaly. It is a neurogenic mitotic disorder which results in small brain size compared to one third of normal brain. Affected patients have normal neuronal migration, neuronal apoptosis and neuronal function. Sixteen MCPH loci have been reported by different scientist from various populations around the world containing the following genes Microcephalin, WDR62, CDKRAP2, CASC, ASPM, CENPJ, STIL, CEPH135, CEPH152, ZNF335, PHC1, CDK6, CENPE, SAS6, MFSD2A and ANKLE2. Mutations in any one of the gene will lead to disease phenotype due to premature chromosomal condensation, disturbed mitotic spindle orientation, signaling response as a result of DNA damage. Methodology & Theoretical Orientation: In the current study, the molecular genetics of five families affected with autosomal recessive primary microcephaly from Pakistani origin were studied. By taking the head circumference of the affected individual these families were identified from different cities of Pakistan. Clinical information was collected with the help of a carefully designed questionnaire. Venous blood sample of the affected families was collected and genomic DNA was extracted using standard phenol-chloroform method. Four loci i.e. MCPH5 (ASPM), MCPH2 (WDR62), MCPH1 (Microcephalin) and MCPH6 (CENPJ) were selected for initial screening bring the most prevalent loci reported from Pakistan. Linkage analysis of the affected families was done by Polymerase Chain Reaction (PCR) using specific microsatellite markers flanking the selected gene. 8% native Polyacrylamide Gel (PAGE) was used to identify PCR results. Conclusion & Significance: Five families affected with autosomal recessive primary microcephaly were mentioned in this study. These families were screened for ASPM, WDR62, CENPJ genes. These families showed no linkage to the initial screening done for the three most prevalent loci reported from this region. Hence, it can be concluded that disease phenotype in these families is apparently not due to mutations in these three genes, however further screening using more markers and mutation screening of these families will give confirmed results. The aim of this study is to elucidate the molecular genetics of this disorder in five affected families. Linkage analysis will be initially done followed by mutations screening of the families linking to any of the known loci. The current project will enable us to offer carrier screening and genetic counseling, which will be our meager contribution towards reducing the prevalence of this disease our parent population. Results: The gel analysis revealed that two of the families are linked with ASPM gene, whereas the rest of three were not found linked with ASPM, WDR62, CENPJ and Microcephalin genes.
Asmaa AlFadil Hassan Khalifa
University of Medical Sciences and Technology, Sudan
Title: Genetic markers associated with inflammatory bowel disease- detection of NODI, 2 mutations in inflammatory bowel disease among Sudanese patients
Time : 15:00-15:30
Biography:
Abstract:
Asmaa AlFadil Hassan Khalifa has completed her BSc from University of Gezira School of Pharmacy and MSc studies from University of Medical Sciences and Technology, Sudan. In 2018, she has completed a Diploma in IV Compounding Techniques from Notting Hill College, Manchester, United Kingdom. She is a Clinical Pharmacy Specialist and a Member of Sudan Medical Council. She is licensed as Clinical Pharmacist in Department of Health, Abu Dhabi, United Arab Emirates also a BLS Provider in American Heart Association. She did a research in Injection Safe Disposal: Safe Disposal Policy in Compliance with WHO recommendations in 2010 for her BSc thesis sponsored by WHO.
Nigora Mavlyanova
Ministry of Health of the Republic of Uzbekistan, Uzbekistan
Title: The role of xenobiotic enzyme genes in predicting fetal loss syndrome in Uzbekistan
Time : 16:00-16:30
Biography:
Abstract:
Introduction: Fetal loss syndrome is a multifactorial disease characterized by a universal integrated response of the female body to any ill health in the pregnant woman, the fetus and the environment, the result of the action of functionally weakened variants (alleles) of many genes against the background of adverse external and internal factors. Glutathione-S-transferase (GST) metabolizes foreign substances or controls the entry of carcinogens into cells. Aim: The goal of our research was to establish the role of the polymorphic variants of the xenobiotic enzymes genes GSTM1 and GSTT1 and IIe 105Val of the gene GSTP1 in the mechanism of formation and development of fetal loss syndrome. Material & Methods: Molecular genetic studies were conducted in 114 pregnant women aged from 20 to 45 years old. Molecular genetic examination of biomaterials (DNA) was performed at Department of Molecular Medicine and Cellular Technologies of the Research Institute of Hematology and Blood Transfusion of the Ministry of Health of the Republic of Uzbekistan. Statistical analysis of the results was carried out using the statistical software package "OpenEpi 2009, Version 2.3". Results: The results of molecular genetic studies in pregnant women with Fetal Loss Syndrome (PPS) showed an increased detection rate of combined functionally defective genotypes GSTM10/0+GSTT10/0 - 25.4%, against the control group 4.1% (χ2=12.4; P=0.0004; OR=7.8; 95% CI 2.146-28.65). Whereas, with the combined variants - the null and functional genotypes of the polymorphism of the GSTM1 and GSTT1 genes between the studied groups did not reveal statistically significant differences (χ2=0.1; P=0.3; OR=1.4; 95% CI 0.697-282; p>0.05). Whereas, the distribution of genotypes IIe 105 Val of the GSTP1 xenobiotic enzyme in pregnant women revealed a high detectability of A/G genotype polymorphism in the pregnant group compared to the control group 56.1% versus 19.4%, which was 2.9 times higher than the control groups. Thus, an analysis of the association of genic combinations of zero polymorphisms of the GSTM1 and GSTT1 genes revealed that in the group of pregnant women with fetal loss syndrome, combinations of the homozygous del/del genotype responsible for the lower level of protein product synthesis are significantly more common. The chance of developing pathology in the presence of this combination of the genotypic version of the del/ del genes GSTM1 and GSTT1 increases significantly: Up to 7.8 times more than other genotypes (χ2=12.4; P=0.0004; OR=7.8; 95% CI 2.146-28.65). Whereas, the functionally unfavorable GSTP1 G allele 2.7 times was statistically significantly predominant in the studied chromosomes of pregnant women with PPS compared with pregnant women without PBS (χ2=4.6; P=0.03; OR=4.5; 95% CI 1.061-19.5). Conclusion: Analysis of the results showed that the polymorphism variants of the GSTM10/0+GSTT10/0 genotypes of the GSTM1 and GSTT1 genes, as well as the G/A IIe 105 Val genotypes of the GSTP1 gene are significant predictors of the risk of developing fetal loss syndrome, resulting in disorders of the detoxification process in the body in women during pregnancy.
Nigora Mavlyanova
Ministry of Health of the Republic of Uzbekistan, Uzbekistan
Title: The role of xenobiotic enzyme genes in predicting fetal loss syndrome in Uzbekistan
Time : 0000
Biography:
Abstract:
Introduction: Fetal loss syndrome is a multifactorial disease characterized by a universal integrated response of the female body to any ill health in the pregnant woman, the fetus and the environment, the result of the action of functionally weakened variants (alleles) of many genes against the background of adverse external and internal factors. Glutathione-S-transferase (GST) metabolizes foreign substances or controls the entry of carcinogens into cells. Aim: The goal of our research was to establish the role of the polymorphic variants of the xenobiotic enzymes genes GSTM1 and GSTT1 and IIe 105Val of the gene GSTP1 in the mechanism of formation and development of fetal loss syndrome. Material & Methods: Molecular genetic studies were conducted in 114 pregnant women aged from 20 to 45 years old. Molecular genetic examination of biomaterials (DNA) was performed at Department of Molecular Medicine and Cellular Technologies of the Research Institute of Hematology and Blood Transfusion of the Ministry of Health of the Republic of Uzbekistan. Statistical analysis of the results was carried out using the statistical software package "OpenEpi 2009, Version 2.3". Results: The results of molecular genetic studies in pregnant women with Fetal Loss Syndrome (PPS) showed an increased detection rate of combined functionally defective genotypes GSTM10/0+GSTT10/0 - 25.4%, against the control group 4.1% (χ2=12.4; P=0.0004; OR=7.8; 95% CI 2.146-28.65). Whereas, with the combined variants - the null and functional genotypes of the polymorphism of the GSTM1 and GSTT1 genes between the studied groups did not reveal statistically significant differences (χ2=0.1; P=0.3; OR=1.4; 95% CI 0.697-282; p>0.05). Whereas, the distribution of genotypes IIe 105 Val of the GSTP1 xenobiotic enzyme in pregnant women revealed a high detectability of A/G genotype polymorphism in the pregnant group compared to the control group 56.1% versus 19.4%, which was 2.9 times higher than the control groups. Thus, an analysis of the association of genic combinations of zero polymorphisms of the GSTM1 and GSTT1 genes revealed that in the group of pregnant women with fetal loss syndrome, combinations of the homozygous del/del genotype responsible for the lower level of protein product synthesis are significantly more common. The chance of developing pathology in the presence of this combination of the genotypic version of the del/ del genes GSTM1 and GSTT1 increases significantly: Up to 7.8 times more than other genotypes (χ2=12.4; P=0.0004; OR=7.8; 95% CI 2.146-28.65). Whereas, the functionally unfavorable GSTP1 G allele 2.7 times was statistically significantly predominant in the studied chromosomes of pregnant women with PPS compared with pregnant women without PBS (χ2=4.6; P=0.03; OR=4.5; 95% CI 1.061-19.5). Conclusion: Analysis of the results showed that the polymorphism variants of the GSTM10/0+GSTT10/0 genotypes of the GSTM1 and GSTT1 genes, as well as the G/A IIe 105 Val genotypes of the GSTP1 gene are significant predictors of the risk of developing fetal loss syndrome, resulting in disorders of the detoxification process in the body in women during pregnancy.
Nigora Mavlyanova
Ministry of Health of the Republic of Uzbekistan, Uzbekistan
Title: The role of xenobiotic enzyme genes in predicting fetal loss syndrome in Uzbekistan
Biography:
Abstract:
Introduction: Fetal loss syndrome is a multifactorial disease characterized by a universal integrated response of the female body to any ill health in the pregnant woman, the fetus and the environment, the result of the action of functionally weakened variants (alleles) of many genes against the background of adverse external and internal factors. Glutathione-S-transferase (GST) metabolizes foreign substances or controls the entry of carcinogens into cells. Aim: The goal of our research was to establish the role of the polymorphic variants of the xenobiotic enzymes genes GSTM1 and GSTT1 and IIe 105Val of the gene GSTP1 in the mechanism of formation and development of fetal loss syndrome. Material & Methods: Molecular genetic studies were conducted in 114 pregnant women aged from 20 to 45 years old. Molecular genetic examination of biomaterials (DNA) was performed at Department of Molecular Medicine and Cellular Technologies of the Research Institute of Hematology and Blood Transfusion of the Ministry of Health of the Republic of Uzbekistan. Statistical analysis of the results was carried out using the statistical software package "OpenEpi 2009, Version 2.3". Results: The results of molecular genetic studies in pregnant women with Fetal Loss Syndrome (PPS) showed an increased detection rate of combined functionally defective genotypes GSTM10/0+GSTT10/0 - 25.4%, against the control group 4.1% (χ2=12.4; P=0.0004; OR=7.8; 95% CI 2.146-28.65). Whereas, with the combined variants - the null and functional genotypes of the polymorphism of the GSTM1 and GSTT1 genes between the studied groups did not reveal statistically significant differences (χ2=0.1; P=0.3; OR=1.4; 95% CI 0.697-282; p>0.05). Whereas, the distribution of genotypes IIe 105 Val of the GSTP1 xenobiotic enzyme in pregnant women revealed a high detectability of A/G genotype polymorphism in the pregnant group compared to the control group 56.1% versus 19.4%, which was 2.9 times higher than the control groups. Thus, an analysis of the association of genic combinations of zero polymorphisms of the GSTM1 and GSTT1 genes revealed that in the group of pregnant women with fetal loss syndrome, combinations of the homozygous del/del genotype responsible for the lower level of protein product synthesis are significantly more common. The chance of developing pathology in the presence of this combination of the genotypic version of the del/ del genes GSTM1 and GSTT1 increases significantly: Up to 7.8 times more than other genotypes (χ2=12.4; P=0.0004; OR=7.8; 95% CI 2.146-28.65). Whereas, the functionally unfavorable GSTP1 G allele 2.7 times was statistically significantly predominant in the studied chromosomes of pregnant women with PPS compared with pregnant women without PBS (χ2=4.6; P=0.03; OR=4.5; 95% CI 1.061-19.5). Conclusion: Analysis of the results showed that the polymorphism variants of the GSTM10/0+GSTT10/0 genotypes of the GSTM1 and GSTT1 genes, as well as the G/A IIe 105 Val genotypes of the GSTP1 gene are significant predictors of the risk of developing fetal loss syndrome, resulting in disorders of the detoxification process in the body in women during pregnancy.
Salma Ahmadloo
Shahid Beheshti University, Iran
Title: Gene expression signatures identify novel regulatory genes and signaling pathways in young hypertensive patients making them susceptible to develop premature coronary heart disease
Time : 16:30-17:00
Biography:
Abstract:
- Immunogenetics | Thalassemia | Genetic Diseases | Human Genetics | Nutrigenomics | Human Evolutionary Genetics | Pharmacogenomics and Pharmacogenetics | Regenerative Medicine | Genetic Counseling | Neurogenetics | Epigenetics | Behavioural Genetics
Session Introduction
Mohammed Chyad Hammoodi Al-Noaemi
Al-Ghad International College for Applied Medical Sciences, KSA
Title: A family cases report of tyrosinemia type-1 from Najran province of Saudi Arabia
Time : 12:00-12:30
Biography:
Abstract:
Biography:
Abstract:
Zeinab Deris Zayeri
Ahvaz Jundishapur University of Medical Sciences, Iran
Title: A novel infram deletion in MSH6 gene in glioma: Conversation on MSH6 mutations in brain tumors
Time : 14:00-14:30
Biography:
Abstract:
Fawz ALHarthi
King Saudi Medical City, Saudi Arabia
Title: Attitudes toward pre-implantation genetic diagnosis vs. pre-natal diagnosis in Saudi Arabian couples with children with genetic disorders
Time : 14:30-15:00
Biography:
Abstract:
Manisha Mishra
All India Institute of Medical Sciences, India
Title: Association of MMP2 gene polymorphisms (-735C/T and -1306C/T) in preeclamptic patients in Indian population
Time : 15:00-15:30
Biography:
Abstract:
Background & Aim: Imbalanced Matrix Metalloproteinase (MMP) expression, including MMP-2, has been demonstrated in pre-eclampsia. However, little is known about the effect of MMP-2 gene polymorphisms on hypertensive disorders of pregnancy. Therefore, we examined Matrix Metalloproteinase (MMP-2) gene polymorphisms (g.-735C/T) and its association with Preeclampsia (PE) and measured the levels of MMP-2 serum concentrations in PE. Method: 30 preeclamptic and 30 healthy pregnant women were enrolled from department of obstetrics and gynaecology, AIIMS, New Delhi after getting approval from Institute ethical committee. Genomic DNA was extracted from blood and amplified by PCR. MMP2 gene polymorphisms of -735C/T was detected by Restriction Fragment Length Polymorphism (RFLP). The levels of MMP2 in sera were measured by ELISA. Result: The maternal serum MMP2 levels was found to be more in PE patients than in control group (p=0.03). The increased frequency of CT genotype for MMP2 (-735C/T) Single Nucleotide Polymorphism was seen in PE patients as compared to control group. However the difference in genotype frequency was not statistically significant (p=0.35). Conclusion: These findings may help to understand the relevance of MMP-2 and its genetic polymorphisms to the pathophysiology of hypertensive disorders of pregnancy like preeclampsia and IUGR.
Nada Abuarab
King Saud Bin Abdul-Aziz University for Health Sciences, Saudi Arabia
Title: High glucose–induced ROS activates TRPM2 to regulate organelle zinc homeostasis and mitochondrial fragmentation
Time : 16:00-16:30
Biography:
Abstract:
Mitochondria plays a central role in oxidative stress induced cell death. By increasing the production of reactive oxygen species, such as H2O2, oxidative stress causes mitochondrial fragmentation and apoptosis. Mechanisms by which oxidative stress leads to apoptosis, however, are not fully understood. Here we hypothesised that Transient Receptor Potential Melastatin 2 (TRPM2) channels play a role in mitochondrial fragmentation. The rationale behind this is the previous evidence that TRPM2 channels are activated by H2O2 and conduct ions (Ca2+ and Zn2+) that affect mitochondrial health and cell survival. To test our hypothesis we have used live-cell imaging, immunostaining, biochemical techniques and cell death assays. Exposure of Human Umbilical Vein Endothelial Cells (HUVECs) to H2O2 led to an increase in Zn2+ levels in the mitochondria and a reduction in lysosomes. This redistribution was accompanied by an extensive fragmentation of mitochondria and an increase in cell death. Silencing of TRPM2 channel prevented intracellular Zn2+ redistribution, mitochondrial fragmentation and cell death. TRPM2 activation increased recruitment of Dynamin-Related protein 1 (Drp1) to mitochondria, thereby increasing mitochondrial fission. Moreover, the data indicated that TRPM2 is expressed in lysosomes presumably to mediate Zn2+ release. Endothelial cells derived from TRPM2 knock-out mice were resistant to oxidative stress-induced mitochondrial fragmentation. In conclusion, our data revealed a novel mechanism where H2O2 activation of TRPM2 causes a redistribution of Zn2+ from lysosomes to mitochondria, resulting in mitochondrial fragmentation and endothelial cell death. Since mitochondrial fragmentation is associated with several age-related chronic illnesses including neuronal (Alzheimer’s, Parkinson’s), cardiovascular (atherosclerosis, myocardial infarction) and metabolic/inflammatory (diabetes) disorders, our results reveal TRPM2 channel as potional therapeutic intervention of age-related illnesses.
Mavlyanova Shakhnoza Zakirovna
Ministry of Health of the Republic of Uzbekistan, Uzbekistan
Title: The role of the polymorphic variant of the IIe 105Val genes of the GSTP1 in the mechanism of the development of allergic skin diseases in Uzbekistan
Time : 16:30-17:00
Biography:
Abstract:
Aim: It is the study of polymorphism of genes of enzymes of biotransformation of xenobiotics in patients with allergic skin diseases. Material & Methods: Patients with allergic dermatoses (AlD), DNA samples of patients and healthy donors, glutathione-transferase GSTM1 (1p13.3), GSTT1 (22q11.2) and IIe 105Val genes of the GSTP1 gene were the object and subject of the study. The study included 88 patients with AlD age ranging from 5 to 67 years. Of these, 41 are women, 50 are men. The diagnosis in all patients is confirmed by the results of the clinical examination and laboratory tests. Results: Among patients with allergic dermatoses, individuals with combined functionally inferior genotypes GSTM10/0+GSTT10/0 were more common than in the group of healthy individuals (6.8% vs. 4.1%, respectively, χ2=0.5; P=0.4; OR=1.7, 95% CI 0.405-6.979). The obtained data indicate that in individuals with zero genotypes of genes of xenobiotic enzymes GSTM1 and GSTT1 there is a tendency to the risk of allergic dermatosis development. Whereas, with the combined variants of zero and functional genotypes of polymorphism of the GSTM1 and GSTT1 genes, there were no statistically significant differences between the groups studied (p>0.05). While the frequency distribution of the occurrence of alleles and genotypes of GSTP1 in the group of patients with allergodermatosis, in comparison with the control group, significant differences were found. The functionally unfavorable allele G of the GSTP1 gene was 3.4 times statistically significantly more prevalent in the studied chromosomes of allergic dermatoses than in the population sample (χ2=10.8; P<0.05; OR=3.4; 95% CI 1.6-7.4). The associations of functionally unfavorable A/G genotypes were identified (χ2=6.9, P<0.05, OR=2.6, 95% CI 1.264-5.382) and G/G (χ2=8.0; P<0.05; OR=11.2; 95% CI 1.421-88.43) with the development of allergic dermatoses. Conclusion: Genes of glutathione transferase, polymorphism IIe 105 Val of the GSTP1 gene is the most significant marker of an increased risk of allergic skin diseases in Uzbekistan.