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Zhang Y, Cui H, Mei H, Yang L, Xin C. Effect of Hypoxic-Ischemic Brain Injury in Neonatal Rats on Behavioral Parameters and Expression of CDK8 in the Brain Tissue. Bull Exp Biol Med 2022; 174:13-17. [PMID: 36449110 DOI: 10.1007/s10517-022-05638-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Indexed: 12/02/2022]
Abstract
Behavioral changes in newborn 3-day-old rats (n=44) with modeled hypoxic-ischemic brain injury (HIBI) were observed, and the expression of CDK8 in brain tissues was detected to clarify the significance of CDK8. In 30 min, 3 h, and 3 days after HIBI, the left (ischemic) hemisphere was taken for examination. In 3 days after HIBI, the rat pups were examined in the behavioral tests. In rat pups with HIBI, changes of CDK8 expression were detected by Western blotting and real-time PCR and changes in the righting reflex and forelimb grip strength test (p<0.05) were revealed in comparison with sham-operated animals. The expression of CDK8 increased 30 min after HIBI and decreased in 3 h and 3 days. Hypoxia and ischemia of the left brain may affect locomotion, but not sensation. Since CDK8 is involved in the immune response after cerebral hypoxia and ischemia, this kinase can be used as an early diagnostic index.
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Affiliation(s)
- Y Zhang
- Department of Pediatric, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - H Cui
- Department of Pediatric, Beijing Friendship Hospital, Capital Medical University, Beijing, China.
| | - H Mei
- Department of Neonatology, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - L Yang
- Department of Pediatric, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - C Xin
- Department of Neonatology, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
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Luo B, Liu J, Xiong L, Fang C, He Y. Normal cerebral blood vessels under ultrasound in SD rats of different ages. Ibrain 2022; 8:346-352. [PMID: 37786747 PMCID: PMC10528998 DOI: 10.1002/ibra.12035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 04/12/2022] [Accepted: 04/12/2022] [Indexed: 10/04/2023]
Abstract
The objective of this study was to examine whether ultrasound can examine the development of cerebral vascular structure and cerebral blood flow in Sprague-Dawley (SD) rats by ultrasound in a noninvasive manner, which provides a reference for ultrasound research of SD rats. Thirty-nine SD rats (7-16 days old) were divided into seven groups according to age, and the number of SD rats in each group was, respectively, 7, 17, 1, 3, 2, 8, and 1. Ultrasound was used to detect cerebral blood vessels, cerebrovascular flow velocity, and heart rate in SD rats in the sagittal and coronal positions, and images were obtained in B-mode ultrasound. The cerebral vascular structure of 39 SD rats (7-16 days) was dynamically observed under B-ultrasound. We found that the cerebral vascular structure of the rats aged 7-10 days was clear and detectable. Rats aged 11-16 days of cerebral vascular structures became thinner and undetectable. Quantitative analysis of cerebrovascular flow rate and heart rate in rats found that there was no significant difference in cerebrovascular blood flow rate and heart rate between 7 and 8 days. Ultrasound can also be used in rat animal studies, that is, the cerebral blood flow in rats of different ages can be monitored in real-time by ultrasound in a noninvasive way.
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Affiliation(s)
- Bo‐Yan Luo
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of PharmacyZunyi Medical UniversityZunyiGuizhouChina
| | - Jin‐Xiang Liu
- Animal Zoology Department, Institute of NeuroscienceKunming Medical UniversityKunmingChina
| | - Liu‐Lin Xiong
- Clinical and Health SciencesUniversity of South AustraliaAdelaideSouth AustraliaAustralia
| | - Chang‐Le Fang
- School of AnesthesiologySouthwest Medical UniversityLuzhouSichuanChina
| | - Yu‐Qi He
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of PharmacyZunyi Medical UniversityZunyiGuizhouChina
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Tomaszewska E, Rudyk H, Świetlicka I, Hułas-Stasiak M, Donaldson J, Arczewska M, Muszyński S, Dobrowolski P, Mielnik-Błaszczak M, Arciszewski MB, Kushnir V, Brezvyn O, Muzyka V, Kotsyumbas I. Trabecular Bone Parameters, TIMP-2, MMP-8, MMP-13, VEGF Expression and Immunolocalization in Bone and Cartilage in Newborn Offspring Prenatally Exposed to Fumonisins. Int J Mol Sci 2021; 22:12528. [PMID: 34830409 DOI: 10.3390/ijms222212528] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/17/2021] [Accepted: 11/18/2021] [Indexed: 01/13/2023] Open
Abstract
Fumonisins are protein serine/threonine phosphatase inhibitors and potent inhibitors of sphingosine N-acyltransferase (ceramide synthase) disrupting de novo sphingolipid biosynthesis. The experiment was conducted to evaluate the effects of fumonisins (FB) exposure from the 7th day of pregnancy to parturition on offspring bone development. The rats were randomly allocated to either a control group (n = 6), not treated with FBs, or to one of the two groups intoxicated with FBs (either at 60 mg FB/kg b.w. or at 90 mg FB/kg b.w. Numerous negative, offspring sex-dependent effects of maternal FB exposure were observed with regards to the histomorphometry of trabecular bone. These effects were due to FB-inducted alterations in bone metabolism, as indicated by changes in the expression of selected proteins involved in bone development: tissue inhibitor of metalloproteinases 2 (TIMP-2), matrix metalloproteinase 8 (MMP-8), matrix metalloproteinase 13 (MMP-13), and vascular endothelial growth factor (VEGF). The immunolocalization of MMPs and TIMP-2 was performed in trabecular and compact bone, as well as articular and growth plate cartilages. Based on the results, it can be concluded that the exposure of pregnant dams to FB negatively affected the expression of certain proteins responsible for bone matrix degradation in newborns prenatally exposed to FB in a dose- and sex-dependent manner.
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Foomani FH, Jarzembowski JA, Mostaghimi S, Mehrvar S, Kumar SN, Ranji M. Optical Metabolic Imaging of Mitochondrial Dysfunction on HADH Mutant Newborn Rat Hearts. IEEE J Transl Eng Health Med 2021; 9:1800407. [PMID: 34462673 PMCID: PMC8396955 DOI: 10.1109/jtehm.2021.3104966] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/15/2021] [Accepted: 08/03/2021] [Indexed: 11/21/2022]
Abstract
BACKGROUND Mitochondrial [Formula: see text]-oxidation of fatty acids is the primary energy source for the heart and carried out by Hydroxy Acyl-CoA Dehydrogenase (HADH) encoded trifunctional protein. Mutations in the genes encoding mitochondrial proteins result in functionally defective protein complexes that contribute to energy deficiencies, excessive reactive oxygen species (ROS) production, and accumulation of damaged mitochondria. We hypothesize that a dramatic alternation in redox state and associated mitochondrial dysfunction is the underlying cause of Fatty Acid Oxidation (FAO) deficiency mutant, resulting in heart failure. Mitochondrial co-enzymes, NADH and FAD, are autofluorescent metabolic indices of cells when imaged, yield a quantitative assessment of the cells' redox status and, in turn, that of the tissue and organ. METHOD We utilized an optical cryo-imager to quantitively evaluate the three-dimensional distribution of mitochondrial redox state in newborn rats' hearts and kidneys. Redox ratio (RR) assessment shows that mitochondrial dysfunction is extreme and could contribute to severe heart problems and eventual heart failure in the mutants. RESULTS Three-dimensional redox ratio (NADH/FAD) rendering, and the volumetric mean value calculations confirmed significantly decreased cardiac RR in mutants by 31.90% and 12.32%, in renal mitochondrial RR compared to wild-type control. Further, histological assessment of newborn heart myocardial tissue indicated no significant difference in myocardial tissue architecture in both control and severe (HADHAe4-/-) conditions. CONCLUSION These results demonstrate that optical imaging can accurately estimate the redox state changes in newborn rat organs. It is also apparent that the FAO mutant's heart tissue with a low redox ratio is probably more vulnerable to cumulative damages than kidneys and fails prematurely, contributing to sudden death.
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Affiliation(s)
- Farnaz H. Foomani
- Biophotonics LaboratoryDepartment of Electrical EngineeringUniversity of Wisconsin–MilwaukeeMilwaukeeWI53201USA
| | - Jason A. Jarzembowski
- Department of Pathology and Laboratory MedicineMedical College of WisconsinMilwaukeeWI53226USA
| | - Soudeh Mostaghimi
- Biophotonics LaboratoryDepartment of Electrical EngineeringUniversity of Wisconsin–MilwaukeeMilwaukeeWI53201USA
| | - Shima Mehrvar
- Biophotonics LaboratoryDepartment of Electrical EngineeringUniversity of Wisconsin–MilwaukeeMilwaukeeWI53201USA
| | - Suresh N. Kumar
- Department of Pathology and Laboratory MedicineMedical College of WisconsinMilwaukeeWI53226USA
| | - Mahsa Ranji
- Biophotonics LaboratoryDepartment of Electrical Engineering and Computer Science (EECS)ISENSE Institute, Florida Atlantic UniversityBoca RatonFL33431USA
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Sun Y, Li L, Song J, Mao W, Xiao K, Jiang C. Intrauterine Hypoxia Changed the Colonization of the Gut Microbiota in Newborn Rats. Front Pediatr 2021; 9:675022. [PMID: 33981656 PMCID: PMC8107277 DOI: 10.3389/fped.2021.675022] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 03/26/2021] [Indexed: 12/28/2022] Open
Abstract
Background: Accumulating evidence suggests a connection between the gut microbiota and neonatal diseases. Hypoxia may play an important role in the intestinal lesions in neonates. Objective: This study aims to determine whether the gut microbiota differs between intrauterine hypoxic rats and healthy controls and to identify the factors that influence the changes in the gut microbiota. Methods: We constructed an intrauterine hypoxia model in rats and collected the intestinal contents of intrauterine hypoxic newborn rats and normal newborn rats within 4 h and on the seventh day after birth. They were divided them into the intrauterine hypoxia first-day group (INH1), intrauterine hypoxia seventh-day group (INH7), normal first-day group (NOR1), and normal seventh-day group (NOR7). The contents of the intestines were sequenced with 16S rRNA sequencing, the sequencing results were analyzed for biological information, and the differences in the diversity, richness, and individual taxa among the groups were analyzed. Results: The abundance of the gut microbiota of neonatal rats with intrauterine hypoxia was higher than that of the control group rats. Intrauterine hypoxia altered the structural composition of the gut microbiota in neonatal rats. The INH1 group showed increased species richness, phylogenetic diversity, and β-diversity, and altered relative abundance in several taxa compared to those in the control group. The differences in the microbiota among the four groups were significantly higher than those within the group, and the differences in the abundance and diversity of the INH7 and NOR7 groups decreased after 7 days of suckling. Functional analysis based on the Cluster of Orthologous Groups (COG) suggested that 23 functional COG categories. There was no significant difference in the functional categories between the hypoxia group and the normal group. Conclusion: Intrauterine hypoxia changed the initial colonization of the gut microbiota in neonatal rats. It could increase the species richness and β-diversity of the gut microbiota, and altered relative abundances of several taxa.
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Affiliation(s)
- Yan Sun
- Department of Neonatology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Lei Li
- Department of Neonatology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jiayu Song
- Department of Neonatology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Wei Mao
- Department of Neonatology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Kaihao Xiao
- Department of Neonatology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Chunming Jiang
- Department of Neonatology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
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Zhang J, Yu Q, Liu Y, Liu H, Sun M, Tian Q, Tu S. [Propofol combined with hypoxia induces cognitive dysfunction in immature rats via p38 pathway]. Nan Fang Yi Ke Da Xue Xue Bao 2018; 38:1294-1299. [PMID: 30514675 PMCID: PMC6744114 DOI: 10.12122/j.issn.1673-4254.2018.11.03] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
OBJECTIVE To investigate the effects of propofol combined with hypoxia on cognitive function of immature rats and the possible role of p38 pathway and tau protein in mediating such effects. METHODS Ninety 7-day-old (P7) SD rats were randomized for daily intraperitoneal injection of propofol (50 mg/kg) or lipid emulsion (5.0 mL/kg) for 7 consecutive days. After each injection, the rats were placed in a warm box (38 ℃) with an oxygen concentration of 18% (hypoxia), 21% (normal air), or 50% (oxygen) until full recovery of the righting reflex. Another 90 P7 rats were similarly grouped and received intraperitoneal injections of p-p38 blocker (15 mg/kg) 30 min before the same treaments. The phosphorylated tau protein, total tau protein and p-p38 content in the hippocampus were detected using Western blotting. The spatial learning and memory abilities of the rats were evaluated with Morris water maze test. RESULTS Compared with lipid emulsion, propofol injection resulted in significantly increased levels of p-p38, phosphorylated tau and total tau proteins in rats with subsequent hypoxic or normal air treatment (P < 0.05), but propofol with oxygen and injections of the blocker before propofol did not cause significant changes in the proteins. Without subsequent oxygenation, the rats receiving injections of propofol, with and without prior blocker injection, all showed significantly prolonged latency time and reduced platform-crossing times and third quadrant residence time compared with the corresponding lipid emulsion groups (P < 0.05). With oxygen treatment, the rats in propofoland blocker-treated groups showed no significant difference in the performance in Morris water maze test from the corresponding lipid emulsion group. The results of Morris water maze test differed significantly between blocker-propofol group and propofol groups irrespective of exposures to different oxygen levels (P < 0.05), but not between the lipid emulsion and blocker group pairs with exposures to different oxygen levels. CONCLUSIONS Propofol combined with hypoxia can affect the expression of tau protein through p38 pathway to impair the cognitive function of immature rats, in which oxygen plays a protective role.
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Affiliation(s)
- Jing Zhang
- Department of Anesthesiology, Children's Hospital of Chongqing Medical University, Chongqing 400014, China.,Ministry of Education Key Laboratory of Child Development and Critical Disorders, Chongqing 400014, China
| | - Qing Yu
- China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing 400014, China
| | - Yang Liu
- Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China
| | - Hui Liu
- Ministry of Education Key Laboratory of Child Development and Critical Disorders, Chongqing 400014, China.,China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing 400014, China
| | - Mang Sun
- China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing 400014, China.,Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China
| | - Qin Tian
- Department of Anesthesiology, Children's Hospital of Chongqing Medical University, Chongqing 400014, China
| | - Shengfen Tu
- Department of Anesthesiology, Children's Hospital of Chongqing Medical University, Chongqing 400014, China
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Kose M, Bastug O, Sonmez MF, Per S, Ozdemir A, Kaymak E, Yahşi H, Ozturk MA. Protective effect of vitamin D against hyperoxia-induced lung injury in newborn rats. Pediatr Pulmonol 2017; 52:69-76. [PMID: 27291304 DOI: 10.1002/ppul.23500] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 05/20/2016] [Accepted: 05/23/2016] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Preterm infants have risks of developing vitamin D deficiency. Thus we aimed to investigate the effect of vitamin D on hyperoxia-induced lung injury in newborn rats. METHODS Full term rat pups were included in the study 12-24 hr after delivery. The pups were randomly divided into eight groups as follows: normoxia control group (NC), normoxia plus vitamin D group (ND1, 1 ng/gr/day vitamin D), normoxia plus vitamin D group (ND2, 3 ng/gr/day vitamin D), normoxia plus vitamin D group (ND3, 5 ng/gr/day vitamin D), hyperoxia control group (HC), hyperoxia plus vitamin D group (HD1, 1 ng/gr/day vitamin D), hyperoxia plus Vitamin D group (HD2, 3 ng/gr/day vitamin D), hyperoxia plus vitamin D group (HD3, 5 ng/gr/day vitamin D). The histopathological effects of vitamin D were assessed by alveolar surface area (with mean linear intercept (MLI) method), apoptosis index and proliferating cell nuclear antigen (PCNA) index. RESULTS MLI values were significantly lower among three groups (HD1: 83.93 ± 1.95 μm, HD2: 81.76 ± 1.68 μm, and HD3: 82.33 ± 1.87 μm) when compared with HC group (92.98 ± 2.09 μm) (P = 0.001, P = 0.0004, P = 0.002, respectively). Apoptotic cell index were significantly lower among three treatment groups (HD1: 1.455 ± 0.153, HD2: 0.575 ± 0.079, and HD3: 0.700 ± 0.105) when compared with HC group (2.500 ± 0.263) (P = 0.001, P = 0.001, P = 0.001, respectively). Although PCNA positive cell index did not change in HD1 group (0.132 ± 0.008) (P > 0.05), there were significant increases in HD2 (0.277 ± 0.026) and HD3 (0.266 ± 0.018) group when compared with HC group (0.142 ± 0.010) (HD2 P = 0.001, HD3 P = 0.001). CONCLUSION Vitamin D seems to protect hyperoxia-induced lung injury in newborn rats. Pediatr Pulmonol. 2017;52:69-76. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Mehmet Kose
- Division of Pediatric Pulmonology Unit, Department of Pediatrics, Erciyes University, Kayseri, Turkey
| | - Osman Bastug
- Division of Neonatology, Department of Pediatrics, Kayseri Training and Research Hospital, Kayseri, Turkey
| | | | - Sedat Per
- Department of Biology, Bozok University, Yozgat, Turkey
| | - Ahmet Ozdemir
- Division of Neonatology, Department of Pediatrics, Erciyes University, Kayseri, Turkey
| | - Emin Kaymak
- Department of Histology, Erciyes University, Kayseri, Turkey
| | - Hande Yahşi
- Department of Histology, Erciyes University, Kayseri, Turkey
| | - Mehmet Adnan Ozturk
- Division of Neonatology, Department of Pediatrics, Erciyes University, Kayseri, Turkey
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Semyachkina-Glushkovskaya O, Borisova E, Abakumov M, Gorin D, Avramov L, Fedosov I, Namykin A, Abdurashitov A, Serov A, Pavlov A, Zinchenko E, Lychagov V, Navolokin N, Shirokov A, Maslyakova G, Zhu D, Luo Q, Chekhonin V, Tuchin V, Kurths J. The Stress and Vascular Catastrophes in Newborn Rats: Mechanisms Preceding and Accompanying the Brain Hemorrhages. Front Physiol 2016; 7:210. [PMID: 27378933 PMCID: PMC4906045 DOI: 10.3389/fphys.2016.00210] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 05/22/2016] [Indexed: 11/17/2022] Open
Abstract
In this study, we analyzed the time-depended scenario of stress response cascade preceding and accompanying brain hemorrhages in newborn rats using an interdisciplinary approach based on: a morphological analysis of brain tissues, coherent-domain optical technologies for visualization of the cerebral blood flow, monitoring of the cerebral oxygenation and the deformability of red blood cells (RBCs). Using a model of stress-induced brain hemorrhages (sound stress, 120 dB, 370 Hz), we studied changes in neonatal brain 2, 4, 6, 8 h after stress (the pre-hemorrhage, latent period) and 24 h after stress (the post-hemorrhage period). We found that latent period of brain hemorrhages is accompanied by gradual pathological changes in systemic, metabolic, and cellular levels of stress. The incidence of brain hemorrhages is characterized by a progression of these changes and the irreversible cell death in the brain areas involved in higher mental functions. These processes are realized via a time-depended reduction of cerebral venous blood flow and oxygenation that was accompanied by an increase in RBCs deformability. The significant depletion of the molecular layer of the prefrontal cortex and the pyramidal neurons, which are crucial for associative learning and attention, is developed as a consequence of homeostasis imbalance. Thus, stress-induced processes preceding and accompanying brain hemorrhages in neonatal period contribute to serious injuries of the brain blood circulation, cerebral metabolic activity and structural elements of cognitive function. These results are an informative platform for further studies of mechanisms underlying stress-induced brain hemorrhages during the first days of life that will improve the future generation's health.
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Affiliation(s)
- Oxana Semyachkina-Glushkovskaya
- Department of Physiology of Human and Animals, Saratov State UniversitySaratov, Russia; Huazhong University of Science and TechnologyWuhan, China
| | - Ekaterina Borisova
- Laboratory of Biophotonics, Institute of Electronics, Bulgarian Academy of Sciences Sofia, Bulgaria
| | - Maxim Abakumov
- Medico-Biological Department, Russian National Research Medical University Moscow, Russia
| | - Dmitry Gorin
- Department of Nanotechnology, Saratov State University Saratov, Russia
| | - Latchezar Avramov
- Laboratory of Biophotonics, Institute of Electronics, Bulgarian Academy of Sciences Sofia, Bulgaria
| | - Ivan Fedosov
- Department of Physics, Saratov State University Saratov, Russia
| | - Anton Namykin
- Department of Physics, Saratov State University Saratov, Russia
| | | | - Alexander Serov
- Department of Physiology of Human and Animals, Saratov State University Saratov, Russia
| | - Alexey Pavlov
- Department of Electrical Engineering and Electronics, Saratov State Technical University Saratov, Russia
| | - Ekaterina Zinchenko
- Department of Physiology of Human and Animals, Saratov State University Saratov, Russia
| | - Vlad Lychagov
- Department of Physics, Saratov State University Saratov, Russia
| | - Nikita Navolokin
- Department of Pathological Anatomy, Saratov State Medical University Saratov, Russia
| | - Alexander Shirokov
- Saratov Research Center, Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences (IBPPM RAS) Saratov, Russia
| | - Galina Maslyakova
- Department of Pathological Anatomy, Saratov State Medical University Saratov, Russia
| | - Dan Zhu
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology Wuhan, China
| | - Qingming Luo
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology Wuhan, China
| | - Vladimir Chekhonin
- Medico-Biological Department, Russian National Research Medical University Moscow, Russia
| | - Valery Tuchin
- Huazhong University of Science and TechnologyWuhan, China; Department of Physics, Saratov State UniversitySaratov, Russia; Laboratory of Biophotonics, Science Department, Tomsk State UniversityTomsk, Russia
| | - Jürgen Kurths
- Huazhong University of Science and TechnologyWuhan, China; Department of Physics, Humboldt UniversityBerlin, Germany; Research Domain Transdisciplinary Concepts and Methods, Potsdam Institute for Climate Impact ResearchPotsdam, Germany
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Nakazawa T, Kasahara K, Ikezaki S, Yamaguchi Y, Edamoto H, Nishimura N, Yahata M, Tamura K, Kamata E, Ema M, Hasegawa R. Renal Tubular Cyst Formation in Newborn Rats Treated with p-Cumylphenol. J Toxicol Pathol 2009; 22:125-31. [PMID: 22271985 PMCID: PMC3246057 DOI: 10.1293/tox.22.125] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Accepted: 02/19/2009] [Indexed: 11/19/2022] Open
Abstract
In this study, we investigated the sequential changes in the development of renal tubular cysts in newborn rats treated with p-cumylphenol (PCP). Fifteen animals per sex were treated orally with 300 mg/kg/day of PCP for up to 18 days from postnatal day (PND) 4 and were sacrificed on PNDs 8, 12, 19 and 22 and after a 7 day recovery period. On PNDs 8 and 12, slight dilatation of the collecting ducts was frequently observed in the medulla and slight papillary necrosis was also noted in some cases. These dilated collecting ducts were lined with slightly hyperplastic epithelial cells. On PNDs 19 and 22, multiple large cystic changes arising from the collecting ducts in the outer medulla were seen. These cystically dilated ducts were also lined with hyperplastic epithelial cells. During the dosing period, the labeling index of proliferating cell nuclear antigen in the collecting duct epithelium was higher in the PCP-treated group than in the control group at all time points. After a 7 day recovery period, the cystic change still remained, although the cell density was decreased and the epithelial cells became flattened. On the other hand, basophilic tubules with peritubular lymphoid cell infiltration were multifocally observed in the cortex. In conclusion, PCP induced multiple renal cysts that developed in the collecting ducts of the outer medulla in neonatal rats, and it is suggested that epithelial cell proliferation may play some roles in the induction of cystic lesions.
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Affiliation(s)
- Tomomi Nakazawa
- Bozo Research Center Inc., 1284 Kamado, Gotemba, Shizuoka 412-0039, Japan
| | - Kenichiro Kasahara
- Bozo Research Center Inc., 1284 Kamado, Gotemba, Shizuoka 412-0039, Japan
| | - Shinichiro Ikezaki
- Bozo Research Center Inc., 1284 Kamado, Gotemba, Shizuoka 412-0039, Japan
| | - Yuko Yamaguchi
- Bozo Research Center Inc., 1284 Kamado, Gotemba, Shizuoka 412-0039, Japan
| | - Hiroshi Edamoto
- Bozo Research Center Inc., 1284 Kamado, Gotemba, Shizuoka 412-0039, Japan
| | - Nobuo Nishimura
- Bozo Research Center Inc., 1284 Kamado, Gotemba, Shizuoka 412-0039, Japan
| | - Megumi Yahata
- Bozo Research Center Inc., 1284 Kamado, Gotemba, Shizuoka 412-0039, Japan
| | - Kazutoshi Tamura
- Bozo Research Center Inc., 1284 Kamado, Gotemba, Shizuoka 412-0039, Japan
| | - Eiichi Kamata
- National Institute of Health Sciences, 1–18–1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Makoto Ema
- National Institute of Health Sciences, 1–18–1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Ryuichi Hasegawa
- National Institute of Health Sciences, 1–18–1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
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