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Xhakaza NK, Nkomozepi P, Mbajiorgu EF. Boophone disticha attenuates five day repeated forced swim-induced stress and adult hippocampal neurogenesis impairment in male Balb/c mice. Anat Cell Biol 2023; 56:69-85. [PMID: 36267006 PMCID: PMC9989792 DOI: 10.5115/acb.22.120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 08/30/2022] [Accepted: 09/06/2022] [Indexed: 11/27/2022] Open
Abstract
Depression is one of the most common neuropsychiatric disorders and is associated with dysfunction of the neuroendocrine system and alterations in specific brain proteins. Boophone disticha (BD) is an indigenous psychoactive bulb that belongs to the Amaryllidacae family, which is widely used in Southern Africa to treat depression, with scientific evidence of potent antidepressant-like effects. The present study examined the antidepressant effects of BD and its mechanisms of action by measuring some behavioural parameters in the elevated plus maze, brain content of corticosterone, brain derived neurotropic factor (BDNF), and neuroblast differentiation in the hippocampus of Balb/c mice exposed to the five day repeated forced swim stress (5d-RFSS). Male Balb/c mice were subjected to the 5d-RFSS protocol to induce depressive-like behaviour (decreased swimming, increased floating, decreased open arm entry, decreased time spent in the open arms and decreased head dips in the elevated plus maze test) and treated with distilled water, fluoxetine and BD. BD treatment (10 mg/kg/p.o for 3 weeks) significantly attenuated the 5d-RFSS-induced behavioural abnormalities and the elevated serum corticosterone levels observed in stressed mice. Additionally, 5d-RFSS exposure significantly decreased the number of neuroblasts in the hippocampus and BDNF levels in the brain of Balb/c mice, while fluoxetine and BD treatment attenuated these changes. The antidepressant effects of BD were comparable to those of fluoxetine, but unlike fluoxetine, BD did not show any anxiogenic effects, suggesting better pharmacological functions. In conclusion, our study shows that BD exerted antidepressant-like effects in 5d-RFSS mice, mediated in part by normalizing brain corticosterone and BDNF levels.
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Affiliation(s)
- Nkosiphendule Khuthazelani Xhakaza
- School of Anatomical Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.,Department of Anatomy, School of Medicine, Sefako Magkatho Health Sciences University, Pretoria, South Africa
| | - Pilani Nkomozepi
- Department of Human Anatomy and Physiology, Faculty of Health Sciences, University of Johannesburg, Johannesburg, South Africa
| | - Ejekemi Felix Mbajiorgu
- School of Anatomical Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
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2
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Li W, Gao R, Ding Y, Chen X, Liu X, He J, Li F, Long J, Lu S, Yang C, Wang Y. Imbalance hepatic metabolism homeostasis in the F1 generation of endometrial DNMT3B conditional knockout female mice. Front Physiol 2022; 13:1042449. [PMCID: PMC9692016 DOI: 10.3389/fphys.2022.1042449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 11/01/2022] [Indexed: 11/13/2022] Open
Abstract
Numerous studies have suggested the possibility of explaining the etiology of metabolic syndrome through DNA methylation. DNA methyltransferase 3B (DNMT3B) plays an important role in de novo DNA methylation. There was an alteration in maternal (F0) endometrial function, which might lead to growth and developmental disorder in offspring (F1). In this study, we investigated the effect of maternal endometrial DNMT3B deficiency on the metabolism in offspring. We constructed endometrial DNMT3B conditional knockout female mice (cKO) which were mated with normal C57BL/6 male mice to obtain the F1 generation. Further, to study the development of these offspring, we observed them at three different life stages which included the 6-week-old juvenile, 9-week-old sub-adult and 12-week-old adult. Follow the detection of a range of metabolism-related indicators, we found that in the cKO F1 generation, liver triglyceride level was significantly elevated in 9-week-old female mice, lipid droplet deposition was significantly increased in 9-week-old and 12-week-old mice, and the expression of lipid metabolism key factors in the liver was markedly decreased except of 6-week-old male mice. These results indicate that maternal endometrial DNMT3B conditional knockout leads to imbalance in hepatic metabolism in F1 generation, the mechanism of which requires further discussion.
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Affiliation(s)
- Weike Li
- Laboratory of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China
- Joint International Research Laboratory of Reproduction and Development, Chongqing Medical University, Chongqing, China
| | - Rufei Gao
- Laboratory of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China
- Joint International Research Laboratory of Reproduction and Development, Chongqing Medical University, Chongqing, China
| | - Yubin Ding
- Laboratory of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China
- Joint International Research Laboratory of Reproduction and Development, Chongqing Medical University, Chongqing, China
| | - Xuemei Chen
- Laboratory of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China
- Joint International Research Laboratory of Reproduction and Development, Chongqing Medical University, Chongqing, China
| | - Xueqing Liu
- Laboratory of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China
- Joint International Research Laboratory of Reproduction and Development, Chongqing Medical University, Chongqing, China
| | - Junlin He
- Laboratory of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China
- Joint International Research Laboratory of Reproduction and Development, Chongqing Medical University, Chongqing, China
| | - Fangfang Li
- Laboratory of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China
- Joint International Research Laboratory of Reproduction and Development, Chongqing Medical University, Chongqing, China
| | - Jing Long
- Laboratory of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China
- Joint International Research Laboratory of Reproduction and Development, Chongqing Medical University, Chongqing, China
| | - Siyu Lu
- Laboratory of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China
- Joint International Research Laboratory of Reproduction and Development, Chongqing Medical University, Chongqing, China
| | - Chengshun Yang
- Laboratory of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China
- Joint International Research Laboratory of Reproduction and Development, Chongqing Medical University, Chongqing, China
- *Correspondence: Chengshun Yang, ; Yingxiong Wang,
| | - Yingxiong Wang
- Laboratory of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China
- Joint International Research Laboratory of Reproduction and Development, Chongqing Medical University, Chongqing, China
- *Correspondence: Chengshun Yang, ; Yingxiong Wang,
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Cao L, Huang MZ, Zhang Q, Luo ZR, Zhang Y, An PJ, Yang LL, Tan W, Wang CQ, Dou XW, Li Q. The neural stem cell properties of Pkd2l1+ cerebrospinal fluid-contacting neurons in vivo. Front Cell Neurosci 2022; 16:992520. [PMID: 36159391 PMCID: PMC9500444 DOI: 10.3389/fncel.2022.992520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 08/24/2022] [Indexed: 11/13/2022] Open
Abstract
The neural stem cells (NSCs) in the ventricular-subventricular zone of the adult mammalian spinal cord may be of great benefit for repairing spinal cord injuries. However, the sources of NSCs remain unclear. Previously, we have confirmed that cerebrospinal fluid-contacting neurons (CSF-cNs) have NSC potential in vitro. In this study, we verified the NSC properties of CSF-cNs in vivo. In mouse spinal cords, Pkd2l1+ CSF-cNs localized around the central canal express NSC markers. In vitro, Pkd2l1+ CSF-cNs form a neurosphere and express NSC markers. Activation and proliferation of CSF-cNs can be induced by injection of the neurotrophic factors basic fibroblast growth factor (bFGF) and vascular endothelial growth factor (VEGF) into the lateral ventricle. Spinal cord injury (SCI) also induces NSC activation and proliferation of CSF-cNs. Collectively, our results demonstrate that Pkd2l1+ CSF-cNs have NSC properties in vivo and may be involved in SCI recovery.
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Affiliation(s)
- Liang Cao
- Department of Traumatic Orthopedics, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
- School of Clinical Medicine, Guizhou Medical University, Guiyang, China
| | - Ming-Zhi Huang
- Department of Traumatic Orthopedics, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
- School of Clinical Medicine, Guizhou Medical University, Guiyang, China
| | - Qiang Zhang
- School of Clinical Medicine, Guizhou Medical University, Guiyang, China
| | - Zhang-Rong Luo
- School of Clinical Medicine, Guizhou Medical University, Guiyang, China
| | - Yi Zhang
- School of Clinical Medicine, Guizhou Medical University, Guiyang, China
| | - Ping-Jiang An
- Department of Traumatic Orthopedics, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Lei-Luo Yang
- Department of Traumatic Orthopedics, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Wei Tan
- Department of Traumatic Orthopedics, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Chun-Qing Wang
- Department of Traumatic Orthopedics, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Xiao-Wei Dou
- Clinical Research Center, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
- *Correspondence: Xiao-Wei Dou,
| | - Qing Li
- Department of Traumatic Orthopedics, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
- Qing Li,
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Deficiency in FTSJ1 Affects Neuronal Plasticity in the Hippocampal Formation of Mice. BIOLOGY 2022; 11:biology11071011. [PMID: 36101392 PMCID: PMC9312013 DOI: 10.3390/biology11071011] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/01/2022] [Accepted: 07/03/2022] [Indexed: 11/16/2022]
Abstract
Simple Summary Neuronal plasticity refers to the brain’s ability to adapt in response to activity-dependent changes. This process, among others, allows the brain to acquire memory or to compensate for a neurocognitive deficit. We analyzed adult FTSJ1-deficient mice in order to gain insight into the role of FTSJ1 in neuronal plasticity. These mice displayed alterations in the hippocampus (a brain structure that is involved in memory and learning, among other functions) e.g., in the form of changes in dendritic spines. Changes in dendritic spines are considered to represent a morphological hallmark of altered neuronal plasticity, and thus FTSJ1 deficiency might have a direct effect upon the capacity of the brain to adapt to plastic changes. Long-term potentiation (LTP) is an electrophysiological correlate of neuronal plasticity, and is related to learning and to processes attributed to memory. Here we show that LTP in FTSJ1-deficient mice is reduced, hinting at disturbed neuronal plasticity. These findings suggest that FTSJ1 deficiency has an impact on neuronal plasticity not only morphologically but also on the physiological level. Abstract The role of the tRNA methyltransferase FTSJ1 in the brain is largely unknown. We analyzed whether FTSJ1-deficient mice (KO) displayed altered neuronal plasticity. We explored open field behavior (10 KO mice (aged 22–25 weeks)) and 11 age-matched control littermates (WT) and examined mean layer thickness (7 KO; 6 WT) and dendritic spines (5 KO; 5 WT) in the hippocampal area CA1 and the dentate gyrus. Furthermore, long-term potentiation (LTP) within area CA1 was investigated (5 KO; 5 WT), and mass spectrometry (MS) using CA1 tissue (2 each) was performed. Compared to controls, KO mice showed a significant reduction in the mean thickness of apical CA1 layers. Dendritic spine densities were also altered in KO mice. Stable LTP could be induced in the CA1 area of KO mice and remained stable at for at least 1 h, although at a lower level as compared to WTs, while MS data indicated differential abundance of several proteins, which play a role in neuronal plasticity. FTSJ1 has an impact on neuronal plasticity in the murine hippocampal area CA1 at the morphological and physiological levels, which, in conjunction with comparable changes in other cortical areas, might accumulate in disturbed learning and memory functions.
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Mokhtar HEL, Hulail MAE, Mahmoud SM, Yousef DM. Impact of cisplatin administration on cerebellar cortical structure and locomotor activity of infantile and juvenile albino rats: the role of oxidative stress. Anat Sci Int 2021; 97:30-47. [PMID: 34386931 DOI: 10.1007/s12565-021-00624-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 08/01/2021] [Indexed: 11/30/2022]
Abstract
The central neurotoxicity of cisplatin (CisPt) has always raised questions especially during development, but few studies are available. Hence, this work was designed to assess the CisPt's impacts on the postnatal rat cerebellum via evaluation of locomotor activity, histological and immunohistochemical studies, and to focus on cerebellar oxidative stress-related alterations. Eighty newborn pups were divided into 2 equal experimental groups: the control group was kept without any treatment and CisPt-treated group received a single subcutaneous injection of CisPt (5 μg /g b.w.) in their nape at PD10. Ten rats at PD11, PD17, and PD30 ages were weighed, then deeply anesthetized and sacrificed. For locomotor assessment, 20 pups were divided equally into control and CisPt-treated groups and tested at PD11-13, PD15-17, and PD28-30 ages. CisPt-treated rats suffered from decreased motor activity and showed decreased body and cerebellar weights, reduced levels of enzymatic antioxidants (SOD and CAT), and non-enzymatic antioxidant defense (GSH), and increase of lipid peroxidation marker (MDA). Histopathologically, CisPt sowed deleterious changes within cerebellar cortical layers in the form of vacuolations, decreased thickness, and hemorrhage (in PD17), while Purkinje cells exhibited profound degenerative changes in the form of swelling, disrupted arrangement, distortion, and nuclear shrinkage. In CisPt-treated rats, GFAP demonstrated upregulated, hypertrophied, and branched Bergmann glial fibers and reactive astrogliosis. Immuno-localization of Ki-67-positive cells revealed defective migration associated with decreased proliferation in early ages in addition to glial proliferation in PD30. In conclusion, CisPt causes oxidative stress-related deleterious effects on structure of developing cerebellar cortex and affects locomotor activity.
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Affiliation(s)
- Hanan E L Mokhtar
- Human Anatomy and Embryology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Mohey A E Hulail
- Human Anatomy and Embryology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Samar Mortada Mahmoud
- Human Anatomy and Embryology, Faculty of Medicine, Zagazig University, Zagazig, Egypt.
| | - Doaa Mohammed Yousef
- Human Anatomy and Embryology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
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Moreno DG, Utagawa EC, Arva NC, Schafernak KT, Mufson EJ, Perez SE. Postnatal Cytoarchitecture and Neurochemical Hippocampal Dysfunction in Down Syndrome. J Clin Med 2021; 10:jcm10153414. [PMID: 34362198 PMCID: PMC8347520 DOI: 10.3390/jcm10153414] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 07/27/2021] [Accepted: 07/29/2021] [Indexed: 12/11/2022] Open
Abstract
Although the prenatal hippocampus displays deficits in cellular proliferation/migration and volume, which are later associated with memory deficits, little is known about the effects of trisomy 21 on postnatal hippocampal cellular development in Down syndrome (DS). We examined postnatal hippocampal neuronal profiles from autopsies of DS and neurotypical (NTD) neonates born at 38-weeks’-gestation up to children 3 years of age using antibodies against non-phosphorylated (SMI-32) and phosphorylated (SMI-34) neurofilament, calbindin D-28k (Calb), calretinin (Calr), parvalbumin (Parv), doublecortin (DCX) and Ki-67, as well as amyloid precursor protein (APP), amyloid beta (Aβ) and phosphorylated tau (p-tau). Although the distribution of SMI-32-immunoreactive (-ir) hippocampal neurons was similar at all ages in both groups, pyramidal cell apical and basal dendrites were intensely stained in NTD cases. A greater reduction in the number of DCX-ir cells was observed in the hippocampal granule cell layer in DS. Although the distribution of Calb-ir neurons was similar between the youngest and oldest NTD and DS cases, Parv-ir was not detected. Conversely, Calr-ir cells and fibers were observed at all ages in DS, while NTD cases displayed mainly Calr-ir fibers. Hippocampal APP/Aβ-ir diffuse-like plaques were seen in DS and NTD. By contrast, no Aβ1–42 or p-tau profiles were observed. These findings suggest that deficits in hippocampal neurogenesis and pyramidal cell maturation and increased Calr immunoreactivity during early postnatal life contribute to cognitive impairment in DS.
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Affiliation(s)
- David G. Moreno
- Department of Neurobiology, Barrow Neurological Institute, Phoenix, AZ 85013, USA; (D.G.M.); (E.C.U.); (E.J.M.)
| | - Emma C. Utagawa
- Department of Neurobiology, Barrow Neurological Institute, Phoenix, AZ 85013, USA; (D.G.M.); (E.C.U.); (E.J.M.)
| | - Nicoleta C. Arva
- Department of Pathology and Laboratory Medicine, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL 60611, USA;
| | - Kristian T. Schafernak
- Department of Pathology and Laboratory Medicine, Phoenix Children’s Hospital, Phoenix, AZ 85016, USA;
| | - Elliott J. Mufson
- Department of Neurobiology, Barrow Neurological Institute, Phoenix, AZ 85013, USA; (D.G.M.); (E.C.U.); (E.J.M.)
| | - Sylvia E. Perez
- Department of Neurobiology, Barrow Neurological Institute, Phoenix, AZ 85013, USA; (D.G.M.); (E.C.U.); (E.J.M.)
- Correspondence: ; Tel.: +6-02-406-3342
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Wang S, Zhang J, Meng FJ, Yan YJ, Wang B, Guan ZY. Combination of pembrolizumab and 125I attenuates the aggressiveness of non-small cell lung cancer. Oncol Lett 2020; 19:4142-4150. [PMID: 32382353 DOI: 10.3892/ol.2020.11508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 11/14/2019] [Indexed: 11/06/2022] Open
Abstract
Non-small cell lung cancer (NSCLC) is the leading cause of cancer-associated mortality. Therapies targeting programmed cell death 1 ligand 1 (PD1L1) have promising effects on NSCLC. However, resistance to targeted therapy has become the main problem and the underling molecular mechanism remains unclear. In the present study, the expression of PD1L1 in NSCLC was determined and the association with clinicopathological characteristics was analyzed. A combination therapy was also constructed, including pembrolizumab (Pem) and iodine-125 (125I), which represented an efficient strategy for the treatment of NSCLC. The expression of PD1L1 was upregulated in NSCLC tissues and positively correlated with the Ki-67 index, pathological subtypes and risk stages. A higher level of PD1L1 expression was associated with poorer survival in patients with NSCLC, which could be used as a prognostic indicator. When NSCLC cells were cultured in the presence of Pem and 125I seeds, the combination treatment significantly abrogated the tumor proliferation and aggressiveness through the inhibition of matrix metalloproteinase-2 and -9 secretion. Flow cytometry analysis revealed pembrolizumab combined with 125I contributed to a higher rate of apoptosis and cell cycle arrest, indicating that the combination treatment improved the resistance to immunotherapy. Furthermore, the associated molecular mechanism was the dysregulation of ADAM metallopeptidase domain 17. The findings from the present study revealed that PD1L1 could be used as a predictive biomarker, and the application of combination treatment of pembrolizumab and 125I showed promising effects on NSCLC.
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Affiliation(s)
- Shuo Wang
- Department of Thoracic Surgery, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
| | - Jun Zhang
- Department of Thoracic Surgery, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
| | - Fan-Jie Meng
- Department of Thoracic Surgery, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
| | - Yi-Jie Yan
- Department of Thoracic Surgery, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
| | - Bin Wang
- Department of Thoracic Surgery, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
| | - Zhi-Yu Guan
- Department of Thoracic Surgery, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
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