5 results on '"Nikolaos Loukas"'
Search Results
2. A Systematic Review of Bisphenol A from Dietary and Non-Dietary Sources during Pregnancy and Its Possible Connection with Fetal Growth Restriction: Investigating Its Potential Effects and the Window of Fetal Vulnerability
- Author
-
Dionysios Vrachnis, Nikolaos Loukas, Vasilios Pergaliotis, Nikolaos Antonakopoulos, D Zygouris, Christos Iavazzo, George Mastorakos, Aggeliki Kοlialexi, Zoi Iliodromiti, and Nikolaos Vrachnis
- Subjects
Amniotic fluid ,bisphenol A ,Physiology ,Review ,010501 environmental sciences ,Endocrine Disruptors ,01 natural sciences ,fetal growth restriction ,Dietary Exposure ,Fetal Development ,small for gestational age ,Pregnancy ,Risk Factors ,Fetal growth ,Medicine ,Birth Weight ,TX341-641 ,endocrine-disrupting chemical ,0303 health sciences ,Nutrition and Dietetics ,Fetal Growth Retardation ,Food Packaging ,Female ,hormones, hormone substitutes, and hormone antagonists ,endocrine system ,Birth weight ,Food Contamination ,Gestational Age ,Risk Assessment ,03 medical and health sciences ,Phenols ,Animals ,Humans ,Benzhydryl Compounds ,Fetal vulnerability ,030304 developmental biology ,0105 earth and related environmental sciences ,Fetus ,Nutrition. Foods and food supply ,business.industry ,urogenital system ,food ,Infant, Newborn ,Environmental Exposure ,medicine.disease ,Canned foods ,Small for gestational age ,business ,Food Science - Abstract
Bisphenol A (BPA), a ubiquitous endocrine-disrupting chemical (EDC), is increasingly hypothesized to be a factor contributing to changes in fetal growth velocity. BPA exposure may be environmental, occupational, and/or dietary, with canned foods and plastic bottles contributing significantly. Our systematic review aims to evaluate the current literature and to investigate the role of BPA in abnormal fetal growth patterns. A search was conducted in the PubMed and Cochrane databases. A total of 25 articles met the eligibility criteria and were included in this systematic review. Eleven of them failed to show a clear relationship between BPA and abnormal fetal growth. The majority of the remaining studies (9/14) found an inverse association of BPA with indicators of fetal growth, whereas three studies suggested increased fetal growth, and two studies produced contradictory findings. Of note, both of the studies that collected a sample (amniotic fluid) directly reflecting BPA concentration in the fetus during the first half of pregnancy revealed an inverse association with birth weight. In conclusion, there is mounting evidence that combined exposure to BPA from dietary and non-dietary sources during pregnancy may contribute to abnormal fetal growth; a tendency towards fetal growth restriction was shown, especially when exposure occurs during the first half.
- Published
- 2021
3. Phthalates and fetal growth velocity: tracking down the suspected links
- Author
-
Orestis Tsonis, Nikolaos Vrachnis, Nikolaos Antonakopoulos, Chryssi Christodoulaki, Nikolaos Loukas, Mastorakos George, Zoi Iliodromiti, and Dionysios Vrachnis
- Subjects
Birth weight ,Placenta ,Phthalic Acids ,Physiology ,010501 environmental sciences ,Endocrine Disruptors ,01 natural sciences ,Fetal Development ,03 medical and health sciences ,chemistry.chemical_compound ,Pregnancy ,medicine ,Endocrine system ,Humans ,030304 developmental biology ,0105 earth and related environmental sciences ,0303 health sciences ,Fetus ,business.industry ,Phthalate ,Obstetrics and Gynecology ,Epigenome ,medicine.disease ,chemistry ,Pediatrics, Perinatology and Child Health ,Small for gestational age ,Female ,business ,Homeostasis - Abstract
Fetuses that have not achieved their full growth potential are associated with adverse perinatal and long-term outcomes; thus, it is essential to identify environmental factors that can potentially impair normal intrauterine development. Endocrine disrupting compounds (EDCs), substances capable of altering the homeostasis of the endocrine system, are thought to play a role in restriction of growth velocity, with phthalates being among the most common EDCs to which pregnant women are exposed. Such exposure can potentially lead to changes to the epigenome, placental structure, and hormone function and trigger oxidative stress. Given that these pathways have been linked to fetal growth restriction, we reviewed the literature on the relationship between phthalates and fetal growth. The majority of the studies, which used birth weight as an indicator of intrauterine development, showed contradictory results, the main reason being the EDCs' rapid metabolism. However, we can draw more consistent conclusions when phthalates are quantified at more than one time point during pregnancy. In this narrative review, we present current data indicating the role of phthalates, and especially di-(2-ethylhexyl) phthalate (DEHP), in abnormal fetal growth velocity.
- Published
- 2021
4. Partial deletion of chromosome 6p causing developmental delay and mild dysmorphisms in a child: molecular and developmental investigation and literature search
- Author
-
Elisavet Siomou, Dionysios Vrachnis, Nikolaos Loukas, Ioannis Papoulidis, Nikolaos Vrachnis, Efterpi Pavlidou, Emmanouil Manolakos, Nikolaos Antonakopoulos, D Zygouris, Loretta Thomaidis, Zoi Iliodromiti, and Stavroula Oikonomou
- Subjects
0301 basic medicine ,Mental development ,medicine.medical_specialty ,Developmental delay ,Intellectual disability ,Case Report ,Case presentation ,Biology ,QH426-470 ,6p22.3 deletion ,Biochemistry ,03 medical and health sciences ,0302 clinical medicine ,Behavioral abnormalities ,High-resolution microarray analysis ,medicine ,Genetics ,Molecular Biology ,Genetics (clinical) ,Biochemistry (medical) ,Cytogenetics ,Chromosome ,Syndrome ,medicine.disease ,Human genetics ,Dysmorphism ,030104 developmental biology ,Oligonucleotide Microarray ,Molecular Medicine ,030217 neurology & neurosurgery - Abstract
Background The interstitial 6p22.3 deletions concern rare chromosomal events affecting numerous aspects of both physical and mental development. The syndrome is characterized by partial deletion of chromosome 6, which may arise in a number of ways. Case presentation We report a 2.8-year old boy presenting with developmental delay and mild dysmorphisms. High-resolution oligonucleotide microarray analysis revealed with high precision a 2.5 Mb interstitial 6p deletion in the 6p22.3 region which encompasses 13 genes. Conclusions Identification and in-depth analysis of cases presenting with mild features of the syndrome will sharpen our understanding of the genetic spectrum of the 6p22.3 deletion.
- Published
- 2020
5. Perinatal Inflammation: Could Partial Blocking of Cell Adhesion Molecule Function Be a Solution?
- Author
-
Georgios Paltoglou, Dionysios Vrachnis, Nikolaos Vrachnis, Georgios Valsamakis, Zoi Iliodromiti, Nikolaos Roussos, Nikolaos Loukas, Stavroula Barbounaki, Nikolaos Antonakopoulos, and D Zygouris
- Subjects
prenatal ,Integrin ,Inflammation ,Review ,Pediatrics ,RJ1-570 ,cell adhesion molecules ,Therapeutic approach ,medicine ,Cell adhesion ,perinatal ,Leukocyte adhesion deficiency ,selectins ,biology ,Cell adhesion molecule ,business.industry ,Ig superfamily ,medicine.disease ,Pediatrics, Perinatology and Child Health ,Immunology ,integrins ,biology.protein ,medicine.symptom ,Antibody ,business ,Selectin ,neonatal inflammation - Abstract
In spite of the great advances made in recent years in prenatal and perinatal medicine, inflammation can still frequently result in injury to vital organs and often constitutes a major cause of morbidity. It is today well established that in neonates—though vulnerability to infection among neonates is triggered by functional impairments in leukocyte adhesion—the decreased expression of cell adhesion molecules also decreases the inflammatory response. It is also clear that the cell adhesion molecules, namely, the integrins, selectins, and the immunoglobulin (Ig) gene super family, all play a crucial role in the inflammatory cascade. Thus, by consolidating our knowledge concerning the actions of these vital cell adhesion molecules during the prenatal period as well as regarding the genetic deficiencies of these molecules, notably leukocyte adhesion deficiency (LAD) I, II, and III, which can provoke severe clinical symptoms throughout the first year of life, it is anticipated that intervention involving blocking the function of cell adhesion molecules in neonatal leukocytes has the potential to constitute an effective therapeutic approach for inflammation. A promising perspective is the potential use of antibody therapy in preterm and term infants with perinatal inflammation and infection focusing on cases in which LAD is involved, while a further important scientific advance related to this issue could be the combination of small peptides aimed at the inhibition of cellular adhesion.
- Published
- 2021
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.