| 51. |
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| 52. |
- Korkman, Marit, et al.
(author)
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Neurocognitive test profiles of extremely low birth weight five-year-old children differ according to neuromotor status
- 2008
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In: Developmental Neuropsychology. - : Informa UK Limited. - 8756-5641 .- 1532-6942. ; 33:5, s. 637-655
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Journal article (peer-reviewed)abstract
- The neurocognitive outcome of children born with extremely low birth weight (ELBW) is highly variable due to the complexity of morbidity. So far, no study has compared comprehensive neuropsychological test profiles in groups with different neuromotor status. In a national cohort of ELBW children neuropsychological test profiles were assessed in 4 groups defined according to a neurological examination at 5 years of age: normal neuromotor status (N = 56). motor coordination problems (N = 32), Multiple Subtle neuromotor signs including, both motor coordination problems and deviant reflexes (N = 20), and spastic diplegia (N = 12). The neurocognitive assessment included a test of intelligence. the Wechsler Primary and Preschool Scale of Intelligence-Revised (WPPSI-R) and 14 subtests of attention and executive functions, verbal functions, Manual motor functions, visuoconstructional functions and verbal learning (NEPSY). The children with normal neuromotor status performed within the average range: children with motor coordination problems had widespread impairment and children with spastic diplegia and children with multiple minor neuromotor(Or Signs had uneven test profiles with stronger verbal results but weaknesses in attention and executive functions, and in manual motor and visuoconstructional tasks. In conclusion, very preterm children with neuromotor signs, including motor coordination problems, are at risk for neurocognitive impairment. in spite of average intelligence. More impaired children have more irregular test profiles. Follow-up and neuropsychological assessment of very preterm children with minor neuromotor signs are therefore indicated.
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| 53. |
- Kostilainen, Kaisamari, et al.
(author)
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Neural processing of changes in phonetic and emotional speech sounds and tones in preterm infants at term age
- 2020
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In: International Journal of Psychophysiology. - : Elsevier BV. - 0167-8760. ; 148, s. 111-118
-
Journal article (peer-reviewed)abstract
- Objective: Auditory change-detection responses provide information on sound discrimination and memory skills in infants. We examined both the automatic change-detection process and the processing of emotional information content in speech in preterm infants in comparison to full-term infants at term age. Methods: Preterm (n = 21) and full-term infants' (n = 20) event-related potentials (ERP) were recorded at term age. A challenging multi-feature mismatch negativity (MMN) paradigm with phonetic deviants and rare emotional speech sounds (happy, sad, angry), and a simple one-deviant oddball paradigm with pure tones were used. Results: Positive mismatch responses (MMR) were found to the emotional sounds and some of the phonetic deviants in preterm and full-term infants in the multi-feature MMN paradigm. Additionally, late positive MMRs to the phonetic deviants were elicited in the preterm group. However, no group differences to speech-sound changes were discovered. In the oddball paradigm, preterm infants had positive MMRs to the deviant change in all latency windows. Responses to non-speech sounds were larger in preterm infants in the second latency window, as well as in the first latency window at the left hemisphere electrodes (F3, C3). Conclusions: No significant group-level differences were discovered in the neural processing of speech sounds between preterm and full-term infants at term age. Change-detection of non-speech sounds, however, may be enhanced in preterm infants at term age. Significance: Auditory processing of speech sounds in healthy preterm infants showed similarities to full-term infants at term age. Large individual variations within the groups may reflect some underlying differences that call for further studies.
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| 54. |
- Kostilainen, Kaisamari, et al.
(author)
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No impact of parental singing during the neonatal period on cognition in preterm-born children at 2–3 years
- 2023
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In: Acta Paediatrica, International Journal of Paediatrics. - : WILEY. - 0803-5253 .- 1651-2227. ; 112:7, s. 1471-1477
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Journal article (peer-reviewed)abstract
- Aim: Studies examining the long-term effects of neonatal music interventions on the cognition of children born preterm are scarce. We investigated whether a parental singing intervention before term age improves cognitive and language skills in preterm-born children. Methods: In this longitudinal, two-country Singing Kangaroo, randomised controlled trial, 74 preterm infants were allocated to a singing intervention or control group. A certified music therapist supported parents of 48 infants in the intervention group to sing or hum during daily skin-to-skin care (Kangaroo care) from neonatal care until term age. Parents of 26 infants in the control group conducted standard Kangaroo care. At 2–3 years of corrected age, the cognitive and language skills were assessed with the Bayley Scales of Infant and Toddler Development, Third Edition. Results: There were no significant differences in cognitive and language skills between the intervention and control groups at the follow-up. No associations between the amount of singing and the cognitive and language scores were found. Conclusion: Parental singing intervention during the neonatal period, previously shown to have some beneficial short-term effects on auditory cortical response in preterm infants at term age, showed no significant long-term effects on cognition or language at 2–3 years of corrected age.
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| 55. |
- Kostilainen, Kaisamari, et al.
(author)
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Repeated Parental Singing During Kangaroo Care Improved Neural Processing of Speech Sound Changes in Preterm Infants at Term Age
- 2021
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In: Frontiers in Neuroscience. - : Frontiers Media SA. - 1662-4548 .- 1662-453X. ; 15
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Journal article (peer-reviewed)abstract
- Preterm birth carries a risk for adverse neurodevelopment. Cognitive dysfunctions, such as language disorders may manifest as atypical sound discrimination already in early infancy. As infant-directed singing has been shown to enhance language acquisition in infants, we examined whether parental singing during skin-to-skin care (kangaroo care) improves speech sound discrimination in preterm infants. Forty-five preterm infants born between 26 and 33 gestational weeks (GW) and their parents participated in this cluster-randomized controlled trial (ClinicalTrials ID IRB00003181SK). In both groups, parents conducted kangaroo care during 33–40 GW. In the singing intervention group (n = 24), a certified music therapist guided parents to sing or hum during daily kangaroo care. In the control group (n = 21), parents conducted standard kangaroo care and were not instructed to use their voices. Parents in both groups reported the duration of daily intervention. Auditory event-related potentials were recorded with electroencephalogram at term age using a multi-feature paradigm consisting of phonetic and emotional speech sound changes and a one-deviant oddball paradigm with pure tones. In the multi-feature paradigm, prominent mismatch responses (MMR) were elicited to the emotional sounds and many of the phonetic deviants in the singing intervention group and in the control group to some of the emotional and phonetic deviants. A group difference was found as the MMRs were larger in the singing intervention group, mainly due to larger MMRs being elicited to the emotional sounds, especially in females. The overall duration of the singing intervention (range 15–63 days) was positively associated with the MMR amplitudes for both phonetic and emotional stimuli in both sexes, unlike the daily singing time (range 8–120 min/day). In the oddball paradigm, MMRs for the non-speech sounds were elicited in both groups and no group differences nor connections between the singing time and the response amplitudes were found. These results imply that repeated parental singing during kangaroo care improved auditory discrimination of phonetic and emotional speech sounds in preterm infants at term age. Regular singing routines can be recommended for parents to promote the development of the auditory system and auditory processing of speech sounds in preterm infants.
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| 56. |
- Kotarsky, Heike, et al.
(author)
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BCS1L is expressed in critical regions for neural development during ontogenesis in mice.
- 2007
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In: Gene Expression Patterns. - : Elsevier BV. - 1567-133X. ; 7, s. 266-273
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Journal article (peer-reviewed)abstract
- BCS1L is a chaperone necessary for the incorporation of Rieske Fes and Qcr10p into complex III (CIII) of the respiratory chain. Mutations in the BCS1L gene cause early fetal growth restriction and a lethal neonatal disease in humans, however, the pathogenesis remains unclear. Here, we analysed the expression of BCS1L during mouse embryonic development and compared its expression with that of the mitochondrial markers Porin, GRIM 19, Core 1, and Rieske Fes. BCS1L was strongly expressed in embryonic tissues already at embryonic days 7 (E7) and 9 whereas the expression of Porin and Rieske Fes was not as evident at this time point. At E 11, BCS1L, Porin, and Rieske Fes had overlapping expression patterns in organs known to contain high numbers of mitochondria such as heart, liver and somites. In contrast, BCS1L was differently distributed compared to the mitochondrial proteins Porin, Rieske FeS, Core I and Grim 19 in the floor plate of the E 11, E 12 and E 13 neural tube. These results show that the expression pattern of BCS1L only partially overlaps with the expression of Porin and Rieske Fes. Thus, BCS1L alone or in cooperation with Rieske FES may during development have previously unknown functions beside its role in assembly of complex III. The floor plate of the neural tube is essential for dorsal ventral patterning and the guidance of the developing neurons to their targets. The predominant expression of BCS1L in this region, together with its presence in peripheral ganglia from E13 onwards, indicates a role for BCS1L in the development of neural structures. (c) 2006 Elsevier B.V. All rights reserved.
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| 57. |
- Kotarsky, Heike, et al.
(author)
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Characterization of complex III deficiency and liver dysfunction in GRACILE syndrome caused by a BCS1L mutation.
- 2010
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In: Mitochondrion. - : Elsevier BV. - 1567-7249. ; Jul 1, s. 497-509
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Journal article (peer-reviewed)abstract
- A homozygous mutation in the complex III chaperone BCS1L causes GRACILE syndrome (intrauterine growth restriction, aminoaciduria, cholestasis, hepatic iron overload, lactacidosis). In control and patient fibroblasts we localized BCS1L in inner mitochondrial membranes. In patient liver, kidney, and heart BCS1L and Rieske protein levels, as well as the amount and activity of complex III, were decreased. Major histopathology was found in kidney and liver with cirrhosis and iron deposition, but of iron-related proteins only ferritin levels were high. In placenta from a GRACILE fetus, the ferrooxidases ceruloplasmin and hephaestin were upregulated suggesting association between iron overload and placental dysfunction.
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| 58. |
- Kotarsky, Heike, et al.
(author)
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Metabolite Profiles Reveal Energy Failure and Impaired Beta-Oxidation in Liver of Mice with Complex III Deficiency Due to a BCS1L Mutation.
- 2012
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In: PLoS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 7:7
-
Journal article (peer-reviewed)abstract
- AIMS: Liver is a target organ in many mitochondrial disorders, especially if the complex III assembly factor BCS1L is mutated. To reveal disease mechanism due to such mutations, we have produced a transgenic mouse model with c.232A>G mutation in Bcs1l, the causative mutation for GRACILE syndrome. The homozygous mice develop mitochondrial hepatopathy with steatosis and fibrosis after weaning. Our aim was to assess cellular mechanisms for disease onset and progression using metabolomics. METHODS: With mass spectrometry we analyzed metabolite patterns in liver samples obtained from homozygotes and littermate controls of three ages. As oxidative stress might be a mechanism for mitochondrial hepatopathy, we also assessed H(2)O(2) production and expression of antioxidants. RESULTS: Homozygotes had a similar metabolic profile at 14 days of age as controls, with the exception of slightly decreased AMP. At 24 days, when hepatocytes display first histopathological signs, increases in succinate, fumarate and AMP were found associated with impaired glucose turnover and beta-oxidation. At end stage disease after 30 days, these changes were pronounced with decreased carbohydrates, high levels of acylcarnitines and amino acids, and elevated biogenic amines, especially putrescine. Signs of oxidative stress were present in end-stage disease. CONCLUSIONS: The findings suggest an early Krebs cycle defect with increases of its intermediates, which might play a role in disease onset. During disease progression, carbohydrate and fatty acid metabolism deteriorate leading to a starvation-like condition. The mouse model is valuable for further investigations on mechanisms in mitochondrial hepatopathy and for interventions.
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| 59. |
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| 60. |
- Kotilahti, Kalle, et al.
(author)
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Hemodynamic Responses to Speech and Music in Newborn Infants
- 2010
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In: Human Brain Mapping. - : Wiley. - 1065-9471 .- 1097-0193. ; 31:4, s. 595-603
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Journal article (peer-reviewed)abstract
- We used near-infrared spectroscopy (NIRS) to study responses to speech and music on the auditory cortices of 13 healthy full-term newborn infants during natural sleep. The purpose of the study was to investigate the lateralization of speech and music responses at this stage of development. NIRS data was recorded from eight positions on both hemispheres simultaneously with electroencephalography, electrooculography, electrocardiography, pulse oximetry, and inclinometry. In 11 subjects, statistically significant (P < 0.02) oxygenated (HbO(2)) and total hemoglobin (HbT) responses were recorded. Both stimulus types elicited significant HbO(2) and HUT responses on both hemispheres in five subjects. Six of the 11 subjects had positive HbO(2) and HbT responses to both stimulus types, whereas one subject had negative responses. Mixed positive and negative responses were observed in four neonates. On both hemispheres, speech and music responses were significantly correlated (r = 0.64; P = 0.018 on the left hemisphere (LH) and r = 0.60; P = 0.029 on the right hemisphere (RH)). On the group level, the average response to the speech stimuli was statistically significantly greater than zero in the LH, whereas responses on the RH or to the music stimuli did not differ significantly from zero. This suggests a more coherent response to speech on the LH. However, significant differences in lateralization of the responses or mean response amplitudes of the two stimulus types were not observed on the group level. Hum Brain Mapp 31:595-603, 2010. (C) 2009 Wiley-Liss, Inc.
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