Haemoglobin and serum ferritin levels in newborn babies born to anaemic Iranian women: A cross-sectional study in an Iranian Hospital

The purpose of this study was to assess the haemoglobin and serum ferritin levels in newborn babies of anaemic mothers and to determine relationship between maternal iron status with neonatal biochemical and anthropometric characteristics. A total of 70 pregnant women aged between 17 and 40 years were divided into two groups based on their pre-delivery Haemoglobin (Hb) and Serum Ferritin (SF) concentrations; anaemic mothers Hb<11 g/dl and SF � 10 ng/ml; normal control group Hb � 11 g/dl and SF � 10 ng/ml. Maternal biochemical assessments were obtained before delivery and neonatal anthropometric and biochemical measurements were obtained immediately after delivery. Mean maternal haemoglobin and serum ferritin levels were 11.2±1.16 (g/dl) and 45.8±20.8 (ng/ml), respectively. Incidence of anaemia among Iranian pregnant women in this study was 51.4. Mean neonatal weight, length and head circumference born to anaemic mothers was 2.8±0.23 kg, 47.9±1.0 cm and 31.5±0.9 cm, respectively, while, among neonates born to normal mothers were 3.3±0.1 kg, 49.6±0.8 cm and 33.7±0.6 cm, respectively. No significant correlation were found between neonatal and maternal serum ferritin concentration. Significant differences were found between neonatal haemoglobin levels from normal and anaemic mothers (p<0.001). Maternal Hb level showed significant (p<0.001) positive correlation with neonatal birth weight (r = 0.729), length (r = 0.665) and head circumference (r = 0.762). However, similar positive correlations were not found between maternal serum ferritin concentration and pregnancy outcome. Neonatal haemoglobin levels were positively correlated with that of their mothers' (r = 0.423, p<0.001). In conclusion, this study showed that maternal haemoglobin concentration had strong influence on neonatal parameters. © Asian Network for Scientific Information, 2010

The Role of Serotonin in Fear Learning and Memory: A Systematic Review of Human Studies

Fear is characterized by distinct behavioral and physiological responses that are essential for the survival of the human species. Fear conditioning (FC) serves as a valuable model for studying the acquisition, extinction, and expression of fear. The serotonin (5-hydroxytryptamine, 5-HT) system is known to play a significant role in emotional and motivational aspects of human behavior, including fear learning and expression. Accumulating evidence from both animal and human studies suggests that brain regions involved in FC, such as the amygdala, hippocampus, and prefrontal cortex, possess a high density of 5-HT receptors, implicating the crucial involvement of serotonin in aversive learning. Additionally, studies exploring serotonin gene polymorphisms have indicated their potential influence on FC. Therefore, the objective of this work was to review the existing evidence linking 5-HT with fear learning and memory in humans. Through a comprehensive screening of the PubMed and Web of Science databases, 29 relevant studies were included in the final review. These studies investigated the relationship between serotonin and fear learning using drug manipulations or by studying 5-HT-related gene polymorphisms. The results suggest that elevated levels of 5-HT enhance aversive learning, indicating that the modulation of serotonin 5-HT2A receptors regulates the expression of fear responses in humans. Understanding the role of this neurochemical messenger in associative aversive learning can provide insights into psychiatric disorders such as anxiety and post-traumatic stress disorder (PTSD), among others

Oxygen isotope effect and phase separation in the optical conductivity of (La0.5_{0.5}Pr0.5_{0.5})0.7_{0.7}Ca0.3_{0.3}MnO3_3 thin films

The optical conductivities of films of (La$_{0.5}$Pr$_{0.5}$)$_{0.7}$Ca$_{0.3}$MnO$_3$ with different oxygen isotopes ($^{16}$O and $^{18}$O) have been determined in the spectral range from 0.3 to 4.3 eV using a combination of transmission in the mid-infrared and ellipsometry from the near-infrared to ultra-violet regions. We have found that the isotope exchange strongly affects the optical response in the ferromagnetic phase in a broad frequency range, in contrast to the almost isotope-independent optical conductivity above $T_C$. The substitution by $^{18}$O strongly suppresses the Drude response and a mid-infrared peak while enhancing the conductivity peak at 1.5 eV. A qualitative explanation can be given in terms of the phase separation present in these materials. Moreover, the optical response is similar to the one extracted from measurements in polished samples and other thin films, which signals to the importance of internal strain.Comment: 11 pages, 11 figures, to appear in PR

Investigation of chromosomal abnormalities and microdeletion/ microduplication(s) in fifty Iranian patients with multiple congenital anomalies

Objective: Major birth defects are inborn structural or functional anomalies with long-term disability and adverse impacts on individuals, families, health-care systems, and societies. Approximately 20 of birth defects are due to chromosomal and genetic conditions. Inspired by the fact that neonatal deaths are caused by birth defects in about 20 and 10 of cases in Iran and worldwide respectively, we conducted the present study to unravel the role of chromosome abnormalities, including microdeletion/microduplication(s), in multiple congenital abnormalities in a number of Iranian patients. Materials and Methods: In this descriptive cross-sectional study, 50 sporadic patients with Multiple Congenital Anomalies (MCA) were selected. The techniques employed included conventional karyotyping, fluorescence in situ hybridization (FISH), multiplex ligation-dependent probe amplification (MLPA), and array comparative genomic hybridisation (array-CGH), according to the clinical diagnosis for each patient. Results: Chromosomal abnormalities and microdeletion/microduplication(s) were observed in eight out of fifty patients (16). The abnormalities proved to result from the imbalances in chromosomes 1, 3, 12, and 18 in four of the patients. However, the other four patients were diagnosed to suffer from the known microdeletions of 22q11.21, 16p13.3, 5q35.3, and 7q11.23. Conclusion: In the present study, we report a patient with 46,XY, der(18)12/46,XY, der(18), +mar8 dn presented with MCA associated with hypogammaglobulinemia. Given the patient�s seemingly rare and highly complex chromosomal abnormality and the lack of any concise mechanism presented in the literature to justify the case, we hereby propose a novel mechanism for the formation of both derivative and ring chromosome 18. In addition, we introduce a new 12q abnormality and a novel association of an Xp22.33 duplication with 1q43q44 deletion syndrome. The phenotype analysis of the patients with chromosome abnormality would be beneficial for further phenotype-genotype correlation studies. © 2019 Royan Institute (ACECR). All rights reserved

Transient disruption of M1 during response planning impairs subsequent offline consolidation

Transcranial magnetic stimulation (TMS) was used to probe the involvement of the left primary motor cortex (M1) in the consolidation of a sequencing skill. In particular we asked: (1) if M1 is involved in consolidation of planning processes prior to response execution (2) whether movement preparation and movement execution can undergo consolidation independently and (3) whether sequence consolidation can occur in a stimulus specific manner. TMS was applied to left M1 while subjects prepared left hand sequential finger responses for three different movement sequences, presented in an interleaved fashion. Subjects also trained on three control sequences, where no TMS was applied. Disruption of subsequent consolidation was observed, but only for sequences where subjects had been exposed to TMS during training. Further, reduced consolidation was only observed for movement preparation, not movement execution. We conclude that left M1 is causally involved in the consolidation of effective response planning for left hand movements prior to response execution, and mediates consolidation in a sequence specific manner. These results provide important new insights into the role of M1 in sequential memory consolidation and sequence response planning

Invasive Meningococcal disease, cerebrospinal fluid pleocytosis and acute adverse outcome of children in Tehran, Iran between 1991-2000

The absence of cerebrospinal fluid (CSF) pleocytosis in invasive meningococcal disease (IMD) has been associated with an increased risk of death. It is unknown whether patients who lack a cellular response to central nervous system (CNS) infection are at the same risk of adverse outcome as patiens without CNS infection. To determine the frequency of presentation and outcome of three groups of children with IMD, Group 1, children with CSF pleocytosis (cells &amp;#8805; 10 mm3) and negative or positive cultures, Group 2, children without CSF pleocytosis and with negative CSF pleocytosis but with positive CSF cultures (CNS infection without CSF pleocytosis), we reviewed the medical records of children with IMD. Clinical and laboratory indies and severe adverse outcomes (definded as death or limb loss due to gangrene) were compared in three groups. Multivariable bogistic regression analysis was performed.Of the 108 available patients, 75 (69%) had CSF pleocytosis, 24 (23%) had bacteremia alone and 18 (16/7%) had CNS infection without CNS plocylosis. Patients with CNS infection without CSF pleocytosis had significantly lower white blood cell and platelet counts and more coagulopathy than patients with bacteremia (P&lt;0.05) of patients with CSF bleocytosis (P&lt;0.01). The frequency of adverse outcome was 61% for patients with CNS infection without CSF pleocytosis compared with 41.6% for patients with bacteremia alone (P&lt;0.001) and (26.4%) for patients with CSF pleocytosis was independently associated with adverse outcome by multivariable logistic regression analysis (P&lt;0.03). Approximately 38.5% of all children with IMD presented without CSF pleocytosis. Of these patients those with CNS infection without CSF pleacytosis were at higher risk of adverse outcomes than either patients with CSF pleocytosis or patients with bacteremia alone

The first Iranian case of N-acetyl-Glutamate synthase (NAGS) deficiency treated with N-carbamylglutamate

Background: N-acetyl-glutamate synthase (NAGS) deficiency is a rare cause of severe neonatal hyperammonemia. Case report: An 8-day old boy, who was born of non-consanguineous Iranian parents by cesarean section, was admitted to the neonatal intensive care unit due to poor feeding, unconsciousness, and seizures. High Ammonia (920 µmol/L, ref. G (p.Leu391Arg) and the known change in exon 6c.1450T>C (p.Trp484Arg) on the paternal allele. Carglumic acid (Carbaglu®, Orphan Europe Recordati, Paris, France) was started and ammonia declined to normal (55 µmol/l) after 24 hours, for the first time ever in the patient. Based on the severe neurological impairment due to the initial hyperammonemic crisis and difficulties to access to the drug in Iran, a decision was made with the parents to stop treatment with carglumic acid (while sodium benzoate and sodium phenylbutyrate were continued) and the patient died five days later due to hyperammonemic decompensation. Conclusion: NAGS deficiency, although rare, seems to be panethnic. Thus, in case of hyperammonemia without orotic aciduria but with low plasma citrulline, NAGS deficiency should be considered and a trial with carglumic acid started as early as possible. Our case demonstrates that the prognosis of neonatal onset NAGS deficiency largely depends on early recognition and start of therapy

Haemoglobin and Serum Ferritin Levels in Newborn Babies Born to Anaemic Iranian Women: a Cross-Sectional Study in an Iranian Hospital

International audience(Com. 1er mars 2005, Thévenot c/ CGA, arrêt n° 319 FD, JCP 2005 éd. E.857, note E. Scholastique ; Com. 19 avr. 2005, SA Eurofactor c/ Michel, arrêt n° 03-13.787