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Phototherapy causes a transient DNA damage in jaundiced newborns. 2013

Hasan Kahveci, and Hasan Dogan, and Ali Karaman, and Ibrahim Caner, and Ayhan Tastekin, and Mevlit Ikbal
Division of Neonatology, Ministry of Health Erzurum Nene Hatun Maternity Hospital, Erzurum, Turkey.

In this study, we aimed to clarify the following questions: 1) Does phototherapy (PT) cause genotoxicity in full-term newborn babies undergoing PT as a result of neonatal jaundice?, 2) if genotoxic effect occurs, is there any relationship between the duration of PT and genotoxicity?, and 3) is genotoxic effect temporary or not? The frequency of sister chromatid exchange (SCE) was determined in jaundiced newborns before, during, and after phototherapy, then determined again in childhood (approximately 3.5 years old). Mean frequency of SCE of 22 full-term jaundiced babies significantly increased during the PT procedure and in every single day, compared to the previous day, in comparison to the pre-PT basal value (6.20 ± 0.57;); mean SCE frequencies at 24, 48, 72, and 96 hours were 7.75 ± 0.40, 8.16 ± 0.47, 8.50 ± 0.40, and 9.36 ± 0.55, respectively (all P-values <0.01). In childhood, no significant difference was found between the mean SCE value (4.9 ± 0.9) of 20 of 22 children, who received PT in the neonatal period, and the mean SCE value (4.7 ± 0.6) of 20 coevaluated healthy children (P = 0.40). This study demonstrates that the negative effect of PT on SCE is a temporary effect.

UI MeSH Term Description Entries
D007231 Infant, Newborn An infant during the first 28 days after birth. Neonate,Newborns,Infants, Newborn,Neonates,Newborn,Newborn Infant,Newborn Infants
D007567 Jaundice, Neonatal Yellow discoloration of the SKIN; MUCOUS MEMBRANE; and SCLERA in the NEWBORN. It is a sign of NEONATAL HYPERBILIRUBINEMIA. Most cases are transient self-limiting (PHYSIOLOGICAL NEONATAL JAUNDICE) occurring in the first week of life, but some can be a sign of pathological disorders, particularly LIVER DISEASES. Icterus Gravis Neonatorum,Neonatal Jaundice,Physiological Neonatal Jaundice,Severe Jaundice in Neonate,Severe Jaundice in Newborn,Jaundice, Physiological Neonatal,Neonatal Jaundice, Physiological
D008297 Male Males
D010789 Phototherapy Treatment of disease by exposure to light, especially by variously concentrated light rays or specific wavelengths. Blue Light Therapy,Blue-light Therapy,Light Therapy,Photoradiation Therapy,Red Light Phototherapy,Therapy, Photoradiation,Blue Light Therapies,Blue-light Therapies,Light Phototherapies, Red,Light Phototherapy, Red,Light Therapies,Light Therapies, Blue,Light Therapy, Blue,Photoradiation Therapies,Phototherapies,Phototherapies, Red Light,Phototherapy, Red Light,Red Light Phototherapies,Therapies, Blue Light,Therapies, Blue-light,Therapies, Light,Therapies, Photoradiation,Therapy, Blue Light,Therapy, Blue-light,Therapy, Light
D004249 DNA Damage Injuries to DNA that introduce deviations from its normal, intact structure and which may, if left unrepaired, result in a MUTATION or a block of DNA REPLICATION. These deviations may be caused by physical or chemical agents and occur by natural or unnatural, introduced circumstances. They include the introduction of illegitimate bases during replication or by deamination or other modification of bases; the loss of a base from the DNA backbone leaving an abasic site; single-strand breaks; double strand breaks; and intrastrand (PYRIMIDINE DIMERS) or interstrand crosslinking. Damage can often be repaired (DNA REPAIR). If the damage is extensive, it can induce APOPTOSIS. DNA Injury,DNA Lesion,DNA Lesions,Genotoxic Stress,Stress, Genotoxic,Injury, DNA,DNA Injuries
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012854 Sister Chromatid Exchange An exchange of segments between the sister chromatids of a chromosome, either between the sister chromatids of a meiotic tetrad or between the sister chromatids of a duplicated somatic chromosome. Its frequency is increased by ultraviolet and ionizing radiation and other mutagenic agents and is particularly high in BLOOM SYNDROME. Chromatid Exchange, Sister,Chromatid Exchanges, Sister,Exchange, Sister Chromatid,Exchanges, Sister Chromatid,Sister Chromatid Exchanges

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