Репозиторий Университета

© 2020 Elsevier B.V. Nerve Growth Factor (NGF) and Brain Derived Neurotrophic Factor (BDNF) are crucial for the peripheral and central nervous system development, respectively, and differential brain and blood levels in Intra Uterine Growth Restriction (IUGR) and prematurity have been found. As reduced growth of brain regions, measured at 30−40 days of postnatal period, has been demonstrated in preterm and IUGR neonates who showed impaired neuro-development at two years of age, in this study, the levels of NGF and BDNF were evaluated in the urine samples of 30−40 day-old subjects who were full-term, preterm and IUGR and showed a normal or an abnormal neuro-development at follow up after two years. Neurotrophins were measured concurrently with volumes of whole brain, thalamus, frontal cortex and cerebellum. Values were then correlated with later neuro-developmental outcome. Biochemical parameters and cerebral volumes were assessed using colorimetric ELISA kits and three-dimensional ultra-sonography (3DUS), respectively. Neuro-development was estimated using the Griffiths-II test. Urinary NGF and brain volumes significantly correlated and were lower in preterm and IUGR subjects characterized by poor neuro-development. No differences were seen in the case of BDNF. The present investigation demonstrates, for the first time, the strong and direct association of NGF with brain growth at the initial phase of the postnatal period and with neuro-developmental outcome in later life. Remarkably, urinary NGF may be suggested as an early prognostic indicator of high long-term risk of motor and cognitive impairment in IUGR and preterm neonates.

© 2020 Elsevier B.V. Nerve Growth Factor (NGF) and Brain Derived Neurotrophic Factor (BDNF) are crucial for the peripheral and central nervous system development, respectively, and differential brain and blood levels in Intra Uterine Growth Restriction (IUGR) and prematurity have been found. As reduced growth of brain regions, measured at 30−40 days of postnatal period, has been demonstrated in preterm and IUGR neonates who showed impaired neuro-development at two years of age, in this study, the levels of NGF and BDNF were evaluated in the urine samples of 30−40 day-old subjects who were full-term, preterm and IUGR and showed a normal or an abnormal neuro-development at follow up after two years. Neurotrophins were measured concurrently with volumes of whole brain, thalamus, frontal cortex and cerebellum. Values were then correlated with later neuro-developmental outcome. Biochemical parameters and cerebral volumes were assessed using colorimetric ELISA kits and three-dimensional ultra-sonography (3DUS), respectively. Neuro-development was estimated using the Griffiths-II test. Urinary NGF and brain volumes significantly correlated and were lower in preterm and IUGR subjects characterized by poor neuro-development. No differences were seen in the case of BDNF. The present investigation demonstrates, for the first time, the strong and direct association of NGF with brain growth at the initial phase of the postnatal period and with neuro-developmental outcome in later life. Remarkably, urinary NGF may be suggested as an early prognostic indicator of high long-term risk of motor and cognitive impairment in IUGR and preterm neonates.

© 2018, Pleiades Publishing, Inc. The article presents empirical data on the possible use of transcranial Doppler sonography as a method for the identification of functional specialization of hemispheres. We investigated intrahemispheric differences in the increase in blood flow velocity indicators during the performance of cognitive tasks with verbal and nonverbal stimuli in 20 healthy right-handed participants and 20 right-handed patients with local unilateral vascular brain lesions. We observed interhemispheric and intrahemispheric differences in blood flow velocity indicators between arteries during the performance of cognitive tasks with different variants of verbal stimuli in all participants. It has been found that one of the hemispheres plays a dominant role in verbal and nonverbal stimulus processing.

© 2018, Dynasty Publishing House. All rights reserved. The objective. Was to develop echographic and Doppler prognostic markers of lesions of the central nervous system (CNS) in premature newborns. Patients and methods. In accordance with the objective of the study we conducted a complex prospective examination of 196 pregnant women diagnosed with threatened preterm labour. The treatment group consisted of 166 women, whose pregnancy ended with spontaneous births at terms 22–36 wks, and premature newborns later developed various disorders of CNS. Results. We found morphological ultrasound and Doppler ultrasound specificities of fetal CNS against the background of threatened preterm labour depending on the term of gestation at the moment of birth and subsequent neurological disorders in premature infants. The most significant were changes of the ventriculo-cranial index, width of anterior horns of lateral ventricles, thalamo-occipital distance, systolic-diastolic ratio between vertebrobasilar vessels of the brain. Conclusion. Such a detailed prenatal diagnosis contributes to noninvasive prognostication of the severity of neurological lesions of CNS in premature infants. The results showed interrelations between perinatal outcomes and initial blood flow impairment of fetal CNS in 97% of observations.

Problem of internal carotid artery disease diagnosis appears to be crucial today. Complications of this pathology are strokes and transient ischemic attacks. There is no technology for their prediction or at least stratifying risks. Some recent researches are devoted to a new diagnostic method. This new technology is called Contrast Enhanced Ultrasonography (CEUS) and followed by outstanding results in studying the morphological peculiarities of internal carotid artery plaques and predicting the probability of complications. CEUS is a new way for atherosclerotic process analysis because it is able to detect intraplaque neovascularization and vascular wall inflammation.

Previously, atherosclerosis was considered a disease accompanied exclusively by lipids accumulation. At present time success of fundamental and experimental science confirmed that atherosclerotic process is also associated with neovascularization and prolonged inflammatory response at all stages of atherogenesis from initial manifestations to thrombotic complications. The cause of atherosclerotic plaque instability is neovascularization, which is accompanied by intra-plaque hemorrhage and damage. Complications of carotid arteries atherosclerosis are strokes and transient ischemic attacks. The use of a wide range of diagnostic and pathohistological techniques is required for assessing this pathology. The most promising diagnostic technique is Contrast Enhanced Ultrasonography (CEUS) which allows to assess neovascularization degree in atherosclerotic plaque through the injection of a contrast agents.

© 2018 Russian Electronic Journal of Radiology. All rights reserved. Purpose. The purpose of this study was to determine ultrasound criteria of normal temporomandibular joint structure and function. Materials and methods. Prospective study was conducted upon normal 16 TMJs of 9 patients (4 male, 5 female with mean age of 22.9 years) without clinical or radiological signs of disc displacement. All the patients underwent high-resolution ultrasound (Samsung SONO ACE R3, 12 MHz linear probe) and MR imaging of TMJs with the mouth closed and during the maximal mandibular range of motion. Both examinations were performed and interpreted independently by blinded expert operators. Results. Mouth opening range varied from 4.4 cm to 5.4 cm, average amount was defined as 4.94 ± 0.39 cm. Also average heights of the front, middle and rear parts of disc were measured (0,42 ± 0,07 cm; 0,35 ± 0,07 cm and 0,41 ± 0,05 cm, respectively). Structure of the TMJ disc can be defined as fine-grained, hypoechoic and homogeneous. The average height of lower joint space was defined as 0,12 ± 0,03 cm. Average amount of maximal parasagittal mandible condyle movement was defined as 14.7 ± 1.38 mm. Conclusion. Obtained results of ultrasound criteria of normal temporomandibular joint structure and function correspond to the provisions of normal human anatomy and the norm values established for the MRI of the TMJ. Thus, ultrasound criteria of normal temporomandibular joint can be used for assessment of TMJ internal degenerative diseases.