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Xi X, Zhang R, Chi Y, Zhu Z, Sun R, Gong W. TXNIP Regulates NLRP3 Inflammasome-Induced Pyroptosis Related to Aging via cAMP/PKA and PI3K/Akt Signaling Pathways. Mol Neurobiol 2024:10.1007/s12035-024-04089-5. [PMID: 38460079 DOI: 10.1007/s12035-024-04089-5] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 03/02/2024] [Indexed: 03/11/2024]
Abstract
Aging is an inevitable natural process with time-dependent dysfunction and the occurrence of various diseases, which impose heavy burdens on individuals, families, and society. It has been reported that NLRP3 inflammasome-induced pyroptosis contributes significantly to age-related diseases and aging, while TXNIP is suggested to be involved in regulating pyroptosis mediated by NLRP3. However, the mechanism between TXNIP and NLRP3 inflammasome is still unclear. In this study, we used HT-22 cells to explore the effect of TXNIP on pyroptosis and its potential association with the aging. Also, we delved into the underlying mechanisms. Our findings revealed that TXNIP significantly augmented pyroptosis in HT-22 cells, primarily by enhancing the activation of the NLRP3 inflammasome and promoting the release of proinflammatory cytokines. Remarkably, as TXNIP levels increased, we observed a corresponding rise in the number of p16-positive cells, which is indicative of aging. Furthermore, we conducted experiments to modulate the improvement of TXNIP on NLRP3 inflammasome-induced pyroptosis, that is, the PI3K activator 740 Y-P and the PKA activator DC2797 inhibited the effect, while the PI3K inhibitor LY294002 and the PKA inhibitor H89 enhanced the effect. In conclusion, our study demonstrated that TXNIP regulates NLRP3 inflammasome-induced pyroptosis in HT-22 cells related to aging via the PI3K/Akt and cAMP/PKA pathways.
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Affiliation(s)
- Xiaoshuang Xi
- Beijing Rehabilitation Hospital, Capital Medical University, Beijing, China
- Beijing Rehabilitation Medicine Academy, Capital Medical University, Beijing, China
| | - Rong Zhang
- The Second Clinical Medical College, Yunnan University of Chinese Medicine, Kunming, Yunnan, China
| | - Yijia Chi
- Beijing Rehabilitation Hospital, Capital Medical University, Beijing, China
- Beijing Rehabilitation Medicine Academy, Capital Medical University, Beijing, China
| | - Ziman Zhu
- Beijing Rehabilitation Hospital, Capital Medical University, Beijing, China
- Beijing Rehabilitation Medicine Academy, Capital Medical University, Beijing, China
| | - Ruifeng Sun
- Beijing Rehabilitation Hospital, Capital Medical University, Beijing, China
- Beijing Rehabilitation Medicine Academy, Capital Medical University, Beijing, China
| | - Weijun Gong
- Department of Neurological Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing, China.
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Zhu Z, Tao X, Dai T, Wu J, Han C, Huang P, Gong W. Cognitive-exercise dual-task attenuates chronic cerebral ischemia-induced cognitive impairment by activating cAMP/PKA pathway through inhibiting EphrinA3/EphA4. Exp Neurol 2024; 372:114617. [PMID: 38007209 DOI: 10.1016/j.expneurol.2023.114617] [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: 07/19/2023] [Revised: 11/03/2023] [Accepted: 11/19/2023] [Indexed: 11/27/2023]
Abstract
BACKGROUND The prevalence of vascular cognitive impairment induced by chronic cerebral ischemia (CCI) is increasing year by year. Cognitive-exercise dual-task intervention has shown beneficial effects on improving cognitive performance in ischemic patients. It is well known that the tyrosine kinase ligand-receptor (Ephrin-Eph) system plays an important role in synaptic transmission and that the cAMP/PKA pathway is associated with cognitive function. However, it is unclear whether they are responsible for the dual-task improving cognitive impairment in CCI. METHODS Bilateral common carotid artery occlusion (BCCAO) in SD rats was used to establish the CCI model. The effects of dual-task and single-task on cognitive function and the expressions of EphrinA3, EphA4, cAMP, and PKA in rats were detected by the novel object recognition (NOR) test, immunofluorescence staining, quantitative real-time polymerase chain reaction (qPCR), and Western blotting (WB), respectively. Overexpression or knockdown of EphrinA3 in astrocytes or rats were constructed by lentivirus infection to verify the effects of EphrinA3/EphA4 on the cAMP/PKA pathway. RESULTS After dual-task intervention, the discrimination index of rats increased significantly compared with the rats in the CCI group. The expressions of EphrinA3 and EphA4 were decreased, while the expressions of cAMP and PKA were increased. Furthermore, knockdown of EphrinA3 alleviated the trend of CCI-induced cognitive decline in rats and OGD-stimulated cellular damage. It also increased cAMP/PKA expression in hippocampal neurons. CONCLUSION Cognitive-exercise dual-task can significantly improve the cognitive impairment induced by CCI, and this effect may be better than that of the cognitive or exercise single-task intervention. The improvement may be related to the inhibition of EphrinA3/EphA4, followed by activation of the cAMP/PKA pathway.
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Affiliation(s)
- Ziman Zhu
- Beijing Rehabilitation Hospital, Beijing Rehabilitation Medicine Academy, Capital Medical University, Beijing 100144, China
| | - Xue Tao
- Department of Research, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, China
| | - Tengteng Dai
- The Second Clinical Medical College of Yunnan University of Chinese Medicine, Yunnan 650500, China
| | - Jilin Wu
- Beijing Rehabilitation Hospital, Beijing Rehabilitation Medicine Academy, Capital Medical University, Beijing 100144, China
| | - Conglin Han
- Rehabilitation Medicine Academy, Weifang Medical University, Shandong 261053, China
| | - Peiling Huang
- Department of Neurological Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, China
| | - Weijun Gong
- Department of Neurological Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, China.
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Metaxakis A, Pavlidis M, Tavernarakis N. Neuronal atg1 Coordinates Autophagy Induction and Physiological Adaptations to Balance mTORC1 Signalling. Cells 2023; 12:2024. [PMID: 37626835 PMCID: PMC10453232 DOI: 10.3390/cells12162024] [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: 07/11/2023] [Revised: 08/04/2023] [Accepted: 08/05/2023] [Indexed: 08/27/2023] Open
Abstract
The mTORC1 nutrient-sensing pathway integrates metabolic and endocrine signals into the brain to evoke physiological responses to food deprivation, such as autophagy. Nevertheless, the impact of neuronal mTORC1 activity on neuronal circuits and organismal metabolism remains obscure. Here, we show that mTORC1 inhibition acutely perturbs serotonergic neurotransmission via proteostatic alterations evoked by the autophagy inducer atg1. Neuronal ATG1 alters the intracellular localization of the serotonin transporter, which increases the extracellular serotonin and stimulates the 5HTR7 postsynaptic receptor. 5HTR7 enhances food-searching behaviour and ecdysone-induced catabolism in Drosophila. Along similar lines, the pharmacological inhibition of mTORC1 in zebrafish also stimulates food-searching behaviour via serotonergic activity. These effects occur in parallel with neuronal autophagy induction, irrespective of the autophagic activity and the protein synthesis reduction. In addition, ectopic neuronal atg1 expression enhances catabolism via insulin pathway downregulation, impedes peptidergic secretion, and activates non-cell autonomous cAMP/PKA. The above exert diverse systemic effects on organismal metabolism, development, melanisation, and longevity. We conclude that neuronal atg1 aligns neuronal autophagy induction with distinct physiological modulations, to orchestrate a coordinated physiological response against reduced mTORC1 activity.
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Affiliation(s)
- Athanasios Metaxakis
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology Hellas, Nikolaou Plastira 100, 70013 Heraklion, Crete, Greece
| | - Michail Pavlidis
- Department of Biology, University of Crete, 71409 Heraklion, Crete, Greece;
| | - Nektarios Tavernarakis
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology Hellas, Nikolaou Plastira 100, 70013 Heraklion, Crete, Greece
- Department of Basic Sciences, Faculty of Medicine, University of Crete, 71110 Heraklion, Crete, Greece
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Atta AA, Ibrahim WW, Mohamed AF, Abdelkader NF. Targeting α7-nAChR by galantamine mitigates reserpine-induced fibromyalgia-like symptoms in rats: Involvement of cAMP/PKA, PI3K/AKT, and M1/M2 microglia polarization. Eur J Pharmacol 2023; 952:175810. [PMID: 37245858 DOI: 10.1016/j.ejphar.2023.175810] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 05/16/2023] [Accepted: 05/25/2023] [Indexed: 05/30/2023]
Abstract
Fibromyalgia (FM) is a pain disorder marked by generalized musculoskeletal pain accompanied by depression, fatigue, and sleep disturbances. Galantamine (Gal) is a positive allosteric modulator of neuronal nicotinic acetylcholine receptors (nAChRs) and a reversible inhibitor of cholinesterase. The current study aimed to explore the therapeutic potential of Gal against reserpine (Res)-induced FM-like condition along with investigating the α7-nAChR's role in Gal-mediated effects. Rats were injected with Res (1 mg/kg/day; sc) for 3 successive days then Gal (5 mg/kg/day; ip) was given alone and with the α7-nAChR blocker methyllycaconitine (3 mg/kg/day; ip), for the subsequent 5 days. Galantamine alleviated Res-induced histopathological changes and monoamines depletion in rats' spinal cord. It also exerted analgesic effect along with ameliorating Res-induced depression and motor-incoordination as confirmed by behavioral tests. Moreover, Gal produced anti-inflammatory effect through modulating AKT1/AKT2 and shifting M1/M2 macrophage polarization. The neuroprotective effects of Gal were mediated through activating cAMP/PKA and PI3K/AKT pathways in α7-nAChR-dependent manner. Thus, Gal can ameliorate Res-induced FM-like symptoms and mitigate the associated monoamines depletion, neuroinflammation, oxidative stress, apoptosis, and neurodegeneration through α7-nAChR stimulation, with the involvement of cAMP/PKA, PI3K/AKT, and M1/M2 macrophage polarization.
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Affiliation(s)
- Ahd A Atta
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Kasr El-Aini St., 11562, Cairo, Egypt.
| | - Weam W Ibrahim
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Kasr El-Aini St., 11562, Cairo, Egypt
| | - Ahmed F Mohamed
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Kasr El-Aini St., 11562, Cairo, Egypt
| | - Noha F Abdelkader
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Kasr El-Aini St., 11562, Cairo, Egypt
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Hu C, Wang Y, Huang W, Xia Y. E prostanoid receptor-3 promotes oxidized low-density lipoprotein-induced human aortic smooth muscle cells inflammation. ESC Heart Fail 2023; 10:1077-1089. [PMID: 36578105 PMCID: PMC10053191 DOI: 10.1002/ehf2.14264] [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: 08/24/2022] [Revised: 10/24/2022] [Accepted: 11/27/2022] [Indexed: 12/30/2022] Open
Abstract
AIM The progression of atherosclerosis can lead to the occurrence of multiple cardiovascular diseases (coronary heart disease, etc.). E prostanoid receptor-3 (EP3) is known to participate in the progression of atherosclerosis. This study aimed to investigate the mechanism by which EP3 modulates the development of atherosclerosis. METHODS AND RESULTS ApoE-/- mice were used to construct in vivo model of atherosclerosis. Human aortic smooth muscle cells (HASMCs) were stimulated with oxidized low-density lipoprotein (ox-LDL) to construct in vitro model of atherosclerosis. mRNA expressions were assessed by qRT-PCR, and western blot was applied to assess the protein levels. CCK-8 assay was applied to assess the cell viability. The inflammatory cytokines levels were assessed by enzyme-linked immunosorbent assay, and flow cytometry was applied to assess cell apoptosis. In vivo experiment was constructed to investigate the impact of EP3 in atherosclerosis development. L-798106 (EP3 inhibitor) significantly inhibited the levels of pro-inflammatory cytokines in atherosclerosis in vivo. EP3 inhibitor (L-798106) significantly reversed ox-LDL-caused HASMCs injury via inhibiting the apoptosis and inflammatory responses (P < 0.05). The levels of interleukin-17 (IL-17) and intercellular adhesion molecule-1 (ICAM-1) in HASMCs were elevated by ox-LDL, whereas L-798106 or knockdown of cyclic AMP (cAMP) response element-binding protein (CREB) notably restored this phenomenon (P < 0.05). EP3 overexpression further aggravated ox-LDL-induced inflammation in HASMCs, and EP3 up-regulated the levels of IL-17 and ICAM-1 in ox-LDL-treated HASMCs (P < 0.05). EP3 up-regulation promoted the inflammatory responses in ox-LDL-treated HASMCs through mediation of cAMP/protein kinase A (PKA)/CREB/IL-17/ICAM-1 axis (P < 0.05). CONCLUSIONS EP3 inhibitor alleviates ox-LDL-induced HASMC inflammation via mediation of cAMP/PKA/CREB/IL-17/ICAM-1 axis. Our study might shed new lights on discovering novel strategies against atherosclerosis.
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Affiliation(s)
- Chuang‐Jia Hu
- Department of CardiologyFirst Affiliated Hospital of Shantou University Medical CollegeShantouGuangdong ProvinceChina
- Laboratory of Molecular CardiologyFirst Affiliated Hospital of Shantou University Medical CollegeShantouGuangdong ProvinceChina
- Laboratory of Medical Molecular ImagingFirst Affiliated Hospital of Shantou University Medical CollegeShantouGuangdong ProvinceChina
| | - Yan‐Wei Wang
- Department of CardiologyFirst Affiliated Hospital of Shantou University Medical CollegeShantouGuangdong ProvinceChina
| | - Wei‐Xing Huang
- Department of Cardiac SurgeryFirst Affiliated Hospital of Shantou University Medical CollegeShantouGuangdong ProvinceChina
| | - Yu‐Bin Xia
- Department of NephrologyFirst Affiliated Hospital of Shantou University Medical CollegeNo. 57, Changping RdShantou515000Guangdong ProvinceChina
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De Rasmo D, Cormio A, Cormio G, Signorile A. Ovarian Cancer: A Landscape of Mitochondria with Emphasis on Mitochondrial Dynamics. Int J Mol Sci 2023; 24:ijms24021224. [PMID: 36674740 PMCID: PMC9865899 DOI: 10.3390/ijms24021224] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/04/2023] [Accepted: 01/05/2023] [Indexed: 01/11/2023] Open
Abstract
Ovarian cancer (OC) represents the main cause of death from gynecological malignancies in western countries. Altered cellular and mitochondrial metabolism are considered hallmarks in cancer disease. Several mitochondrial aspects have been found altered in OC, such as the oxidative phosphorylation system, oxidative stress and mitochondrial dynamics. Mitochondrial dynamics includes cristae remodeling, fusion, and fission processes forming a dynamic mitochondrial network. Alteration of mitochondrial dynamics is associated with metabolic change in tumour development and, in particular, the mitochondrial shaping proteins appear also to be responsible for the chemosensitivity and/or chemoresistance in OC. In this review a focus on the mitochondrial dynamics in OC cells is presented.
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Affiliation(s)
- Domenico De Rasmo
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnology (IBIOM), National Research Council (CNR), 70124 Bari, Italy
| | - Antonella Cormio
- Department of Precision and Regenerative Medicine and Ionian Area, University of Bari Aldo Moro, 70124 Bari, Italy
| | - Gennaro Cormio
- IRCCS Istituto Tumori “Giovanni Paolo II”, 70124 Bari, Italy
- Department of Interdisciplinary Medicine, University of Bari Aldo Moro, 70124 Bari, Italy
| | - Anna Signorile
- Department of Translational Biomedicine and Neuroscience, University of Bari Aldo Moro, 70124 Bari, Italy
- Correspondence:
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Lin Y, Pan J, Liu Y, Yang H, Wu G, Pan Y. Acanthopanax trifoliatus (L.) Merr polysaccharides ameliorates hyperglycemia by regulating hepatic glycogen metabolism in type 2 diabetic mice. Front Nutr 2023; 10:1111287. [PMID: 36845056 PMCID: PMC9948035 DOI: 10.3389/fnut.2023.1111287] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 01/12/2023] [Indexed: 02/11/2023] Open
Abstract
INTRODUCTION Drug monotherapy was inadequate in controlling blood glucose levels and other comorbidities. An agent that selectively tunes multiple targets was regarded as a new therapeutic strategy for type 2 diabetes. Acanthopanax trifoliatus (L.) Merr polysaccharide (ATMP) is a bio-macromolecule isolated from Acanthopanax trifoliatus (L.) Merr and has therapeutic potential for diabetes management due to its anti-hyperglycemia activity. METHODS Type 2 diabetes mellitus was induced in mice using streptozotocin, and 40 and 80 mg/kg ATMP was administered daily via the intragastric route for 8 weeks. Food intake, water intake, and body weight were recorded. The fasting blood glucose (FBG), fasting insulin (FINS) and an oral glucose tolerance test (OGTT) were performed. Histological changes in the liver and pancreas were analyzed by H&E staining. The mRNA and the protein levels of key factors involved in glycogen synthesis, glycogenolysis, and gluconeogenesis were measured by quantitative real time PCR and Western blotting. RESULTS In this study, we found that ATMP could effectively improve glucose tolerance and alleviate insulin resistance by promoting insulin secretion and inhibiting glucagon secretion. In addition, ATMP decreases glycogen synthesis by inhibiting PI3K/Akt/GSK3β signaling, reduces glycogenolysis via suppressing cAMP/PKA signaling, and suppresses liver gluconeogenesis by activating AMPK signaling. CONCLUSION Together, ATMP has the potential to be developed as a new multitargets therapeutics for type 2 diabetes.
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Affiliation(s)
- Yuzi Lin
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Jinghua Pan
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Yue Liu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Huiwen Yang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Guoyu Wu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
- Key Specialty of Clinical Pharmacy, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, China
- *Correspondence: Guoyu Wu, ✉
| | - Yufang Pan
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery and Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, China
- Yufang Pan, ✉
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8
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Yoon JH, Youn K, Jun M. Discovery of Pinostrobin as a Melanogenic Agent in cAMP/PKA and p38 MAPK Signaling Pathway. Nutrients 2022; 14:nu14183713. [PMID: 36145089 PMCID: PMC9504415 DOI: 10.3390/nu14183713] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/23/2022] [Accepted: 09/06/2022] [Indexed: 11/16/2022] Open
Abstract
Melanogenesis is the process of melanin synthesis to protect the skin against ultraviolet radiation and other external stresses. The loss of skin pigmentation is closely related to depigmented skin disorders. The melanogenic effects of pinostrobin, an active flavanone found in honey, were evaluated. B16F10 cells were used for melanin content, tyrosinase activity, and the expression of melanogenesis-related markers. Moreover, computational simulations were performed to predict docking and pharmacokinetics. Pinostrobin increased melanin levels and tyrosinase activity by stimulating the expression of melanogenic regulatory factors including tyrosinase, tyrosinase-related protein (TRP) 1 and microphthalmia transcription factor (MITF). Specifically, the phosphorylation of cAMP response element binding (CREB) involved in the MITF activation was augmented by pinostrobin. Moreover, the compound upregulated the β-catenin by cAMP/PKA-mediated GSK-3β inactivation. Co-treatment with a PKA inhibitor, inhibited melanin production, tyrosinase activity, and expression of MITF, p-CREB, p-GSK-3β and p-β-catenin, demonstrating that pinostrobin-stimulated melanogenesis was closely related to cAMP/PKA signaling pathway. Furthermore, the combination of pinostrobin and a specific p38 inhibitor, showed that MITF upregulation by pinostrobin was partly associated with the p38 signaling pathway. Docking simulation exhibited that the oxygen group at C-4 and the hydroxyl group at C-5 of pinostrobin may play an essential role in melanogenesis. In silico analysis revealed that pinostrobin had the optimal pharmacokinetic profiles including gastrointestinal absorption, skin permeability, and inhibition of cytochrome (CYP) enzymes. From the present results, it might be suggested that pinostrobin could be useful as a potent and safe melanogenic agent in the depigmentation disorder, vitiligo.
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Affiliation(s)
- Jeong-Hyun Yoon
- Department of Health Sciences, The Graduate School of Dong-A University, Busan 49315, Korea
| | - Kumju Youn
- Department of Food Science and Nutrition, Dong-A University, Busan 49315, Korea
| | - Mira Jun
- Department of Health Sciences, The Graduate School of Dong-A University, Busan 49315, Korea
- Department of Food Science and Nutrition, Dong-A University, Busan 49315, Korea
- Center for Food & Bio Innovation, Dong-A University, Busan 49315, Korea
- Correspondence: ; Tel.: +82-51-200-7323; Fax: +82-51-200-7535
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Zhang B, Zhang Y, Guan R, Du M, Yin X, Zhao W, An S. Trehalase is required for sex pheromone biosynthesis in Helicoverpa armigera. Insect Mol Biol 2022; 31:334-345. [PMID: 35084068 DOI: 10.1111/imb.12762] [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] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 12/08/2021] [Accepted: 01/24/2022] [Indexed: 05/14/2023]
Abstract
Trehalase (Treh) hydrolyzes trehalose to generate glucose and it plays important role in many physiological processes. Acetyl-CoA, the precursor of sex pheromone biosynthesis in the pheromone gland (PG) of Helicoverpa armigera, originates from glucose during glycolysis. However, the function of Treh in sex pheromone biosynthesis remains elusive. In the present study, H. armigera was used as a model to investigate the function of two Trehs (Treh1 and Treh2) in sex pheromone biosynthesis. Results demonstrated that knockdown of HaTreh1 or HaTreh2 in female PGs led to significant decreases in Z11-16:Ald production, female ability to attract males, and successful mating proportions. Pheromone biosynthesis activating neuropeptide (PBAN) treatment triggered HaTreh1 and HaTreh2 activities in the isolated PGs and Sf9 cells. However, the activities of HaTreh1 and HaTreh2 triggered by PBAN were offset by H-89, the specific inhibitor of protein kinase A (PKA). Furthermore, the H-89 treatment significantly decreased the phosphorylation level of Trhe2, which was induced by PBAN. In addition, sugar feeding (5% sugar) increased the enzyme activities of Treh1 and Treh2. In summary, our findings confirmed that PBAN activates Treh1/2 activities by recruiting cAMP/PKA signalling, promotes glycolysis to ensure the supply of acetyl-CoA, and ultimately facilitates sex pheromone biosynthesis and mating behaviour.
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Affiliation(s)
- Bo Zhang
- State Key Laboratory of Wheat and Maize Crop Science/College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Yunhui Zhang
- State Key Laboratory of Wheat and Maize Crop Science/College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Ruobing Guan
- State Key Laboratory of Wheat and Maize Crop Science/College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Mengfang Du
- State Key Laboratory of Wheat and Maize Crop Science/College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Xinming Yin
- State Key Laboratory of Wheat and Maize Crop Science/College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Wenli Zhao
- State Key Laboratory of Wheat and Maize Crop Science/College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Shiheng An
- State Key Laboratory of Wheat and Maize Crop Science/College of Plant Protection, Henan Agricultural University, Zhengzhou, China
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Zhang LS, Zhang JS, Hou YL, Lu WW, Ni XQ, Lin F, Liu XY, Wang XJ, Yu YR, Jia MZ, Tang CS, Han L, Chai SB, Qi YF. Intermedin 1-53 Inhibits NLRP3 Inflammasome Activation by Targeting IRE1α in Cardiac Fibrosis. Inflammation 2022; 45:1568-1584. [PMID: 35175495 DOI: 10.1007/s10753-022-01642-z] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 01/27/2022] [Accepted: 01/29/2022] [Indexed: 11/24/2022]
Abstract
Intermedin (IMD), a paracrine/autocrine peptide, protects against cardiac fibrosis. However, the underlying mechanism remains poorly understood. Previous study reports that activation of nucleotide-binding oligomerization domain (NOD)-like receptor family pyrin domain containing 3 (NLRP3) inflammasome contributes to cardiac fibrosis. In this study, we aimed to investigate whether IMD mitigated cardiac fibrosis by inhibiting NLRP3. Cardiac fibrosis was induced by angiotensin II (Ang II) infusion for 2 weeks in rats. Western blot, real-time PCR, histological staining, immunofluorescence assay, RNA sequencing, echocardiography, and hemodynamics were used to detect the role and the mechanism of IMD in cardiac fibrosis. Ang II infusion resulted in rat cardiac fibrosis, shown as over-deposition of myocardial interstitial collagen and cardiac dysfunction. Importantly, NLRP3 activation and endoplasmic reticulum stress (ERS) were found in Ang II-treated rat myocardium. Ang II infusion decreased the expression of IMD and increased the expression of the receptor system of IMD in the fibrotic rat myocardium. IMD treatment attenuated the cardiac fibrosis and improved cardiac function. In addition, IMD inhibited the upregulation of NLRP3 markers and ERS markers induced by Ang II. In vitro, IMD knockdown by small interfering RNA significantly promoted the Ang II-induced cardiac fibroblast and NLRP3 activation. Moreover, silencing of inositol requiring enzyme 1 α (IRE1α) blocked the effects of IMD inhibiting fibroblast and NLRP3 activation. Pre-incubation with PKA pathway inhibitor H89 blocked the effects of IMD on the anti-ERS, anti-NLRP3, and anti-fibrotic response. In conclusion, IMD alleviated cardiac fibrosis by inhibiting NLRP3 inflammasome activation through suppressing IRE1α via the cAMP/PKA pathway.
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Affiliation(s)
- Lin-Shuang Zhang
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University Health Science Center, Beijing, China.,Department of Pathogen Biology, School of Basic Medical Sciences, Peking University Health Science Center, HaidianDistrict, No. 38 Xueyuan Road, Beijing, 100083, China.,School of Nursing, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Jin-Sheng Zhang
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University Health Science Center, Beijing, China.,Department of Pathogen Biology, School of Basic Medical Sciences, Peking University Health Science Center, HaidianDistrict, No. 38 Xueyuan Road, Beijing, 100083, China
| | - Yue-Long Hou
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University Health Science Center, Beijing, China
| | - Wei-Wei Lu
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University Health Science Center, Beijing, China.,Department of Pathogen Biology, School of Basic Medical Sciences, Peking University Health Science Center, HaidianDistrict, No. 38 Xueyuan Road, Beijing, 100083, China
| | - Xian-Qiang Ni
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University Health Science Center, Beijing, China.,Department of Pathogen Biology, School of Basic Medical Sciences, Peking University Health Science Center, HaidianDistrict, No. 38 Xueyuan Road, Beijing, 100083, China
| | - Fan Lin
- Department of Respiratory Disease, Peking University Third Hospital, Beijing, China
| | - Xiu-Ying Liu
- Key Laboratory of Genetic Network Biology, Collaborative Innovation Center of Genetics and Development, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Xiu-Jie Wang
- Key Laboratory of Genetic Network Biology, Collaborative Innovation Center of Genetics and Development, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Yan-Rong Yu
- Department of Pathogen Biology, School of Basic Medical Sciences, Peking University Health Science Center, HaidianDistrict, No. 38 Xueyuan Road, Beijing, 100083, China
| | - Mo-Zhi Jia
- Department of Pathogen Biology, School of Basic Medical Sciences, Peking University Health Science Center, HaidianDistrict, No. 38 Xueyuan Road, Beijing, 100083, China
| | - Chao-Shu Tang
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University Health Science Center, Beijing, China
| | - Ling Han
- Department of Cardiology, Fu Xing Hospital, Capital Medical University, A20 Fuxingmenwai Street, Xicheng District, Beijing, 100038, China.
| | - San-Bao Chai
- Department of Endocrinology, Peking University International Hospital, Life Park Road No. 1, Zhongguancun Life Science Park, Changping District, Beijing, 102206, China.
| | - Yong-Fen Qi
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University Health Science Center, Beijing, China. .,Department of Pathogen Biology, School of Basic Medical Sciences, Peking University Health Science Center, HaidianDistrict, No. 38 Xueyuan Road, Beijing, 100083, China.
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11
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Liang J, Kruijssen DLH, Verschuuren ACJ, Voesenek BJB, Benavides FFW, Sáez Gonzalez M, Ruiter M, Wierenga CJ. Axonal CB1 Receptors Mediate Inhibitory Bouton Formation via cAMP Increase and PKA. J Neurosci 2021; 41:8279-96. [PMID: 34413209 DOI: 10.1523/JNEUROSCI.0851-21.2021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/30/2021] [Accepted: 07/25/2021] [Indexed: 12/11/2022] Open
Abstract
Experience-dependent formation and removal of inhibitory synapses are essential throughout life. For instance, GABAergic synapses are removed to facilitate learning, and strong excitatory activity is accompanied by the formation of inhibitory synapses to maintain coordination between excitation and inhibition. We recently discovered that active dendrites trigger the growth of inhibitory synapses via CB1 receptor-mediated endocannabinoid signaling, but the underlying mechanism remained unclear. Using two-photon microscopy to monitor the formation of individual inhibitory boutons in hippocampal organotypic slices from mice (both sexes), we found that CB1 receptor activation mediated the formation of inhibitory boutons and promoted their subsequent stabilization. Inhibitory bouton formation did not require neuronal activity and was independent of Gi/o-protein signaling, but was directly induced by elevating cAMP levels using forskolin and by activating Gs-proteins using DREADDs. Blocking PKA activity prevented CB1 receptor-mediated inhibitory bouton formation. Our findings reveal that axonal CB1 receptors signal via unconventional downstream pathways and that inhibitory bouton formation is triggered by an increase in axonal cAMP levels. Our results demonstrate an unexpected role for axonal CB1 receptors in axon-specific, and context-dependent, inhibitory synapse formation.SIGNIFICANCE STATEMENT Coordination between excitation and inhibition is required for proper brain function throughout life. It was previously shown that new inhibitory synapses can be formed in response to strong excitation to maintain this coordination, and this was mediated by endocannabinoid signaling via CB1 receptors. As activation of CB1 receptors generally results in the suppression of synaptic transmission, it remained unclear how CB1 receptors can mediate the formation of inhibitory synapses. Here we show that CB1 receptors on inhibitory axons signal via unconventional intracellular pathways and that inhibitory bouton formation is triggered by an increase in axonal cAMP levels and requires PKA activity. Our findings point to a central role for axonal cAMP signaling in activity-dependent inhibitory synapse formation.
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12
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Bourhim T, Villareal MO, Gadhi C, Isoda H. Elucidation of Melanogenesis-Associated Signaling Pathways Regulated by Argan Press Cake in B16 Melanoma Cells. Nutrients 2021; 13:nu13082697. [PMID: 34444857 PMCID: PMC8398289 DOI: 10.3390/nu13082697] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 07/30/2021] [Accepted: 08/02/2021] [Indexed: 12/30/2022] Open
Abstract
The beneficial effect on health of argan oil is recognized worldwide. We have previously reported that the cake that remains after argan oil extraction (argan press-cake or APC) inhibits melanogenesis in B16 melanoma cells in a time-dependent manner without cytotoxicity. In this study, the global gene expression profile of B16 melanoma cells treated with APC extract was determined in order to gain an understanding of the possible mechanisms of action of APC. The results suggest that APC extract inhibits melanin biosynthesis by down-regulating microphthalmia-associated transcription factor (Mitf) and its downstream signaling pathway through JNK signaling activation, and the inhibition of Wnt/β-catenin and cAMP/PKA signaling pathways. APC extract also prevented the transport of melanosomes by down-regulating Rab27a expression. These results suggest that APC may be an important natural skin whitening product and pharmacological agent used for clinical treatment of pigmentary disorders.
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Affiliation(s)
- Thouria Bourhim
- Faculty of Sciences Semlalia, Cadi Ayyad University, Avenue Prince Moulay Abdellah, B.P. 2390, Marrakesh 40000, Morocco;
| | - Myra O. Villareal
- Alliance for Research on the Mediterranean and North Africa (ARENA), University of Tsukuba, Tennodai 1-1-1, Tsukuba 305-8572, Japan;
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba 305-8572, Japan
| | - Chemseddoha Gadhi
- Faculty of Sciences Semlalia, Cadi Ayyad University, Avenue Prince Moulay Abdellah, B.P. 2390, Marrakesh 40000, Morocco;
- Alliance for Research on the Mediterranean and North Africa (ARENA), University of Tsukuba, Tennodai 1-1-1, Tsukuba 305-8572, Japan;
- Correspondence: (C.G.); (H.I.)
| | - Hiroko Isoda
- Alliance for Research on the Mediterranean and North Africa (ARENA), University of Tsukuba, Tennodai 1-1-1, Tsukuba 305-8572, Japan;
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba 305-8572, Japan
- Correspondence: (C.G.); (H.I.)
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13
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Cai E, Sun S, Deng Y, Huang P, Sun X, Wang Y, Chang C, Jiang Z. Histidine Kinase Sln1 and cAMP/PKA Signaling Pathways Antagonistically Regulate Sporisorium scitamineum Mating and Virulence via Transcription Factor Prf1. J Fungi (Basel) 2021; 7:jof7080610. [PMID: 34436149 PMCID: PMC8397173 DOI: 10.3390/jof7080610] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/16/2021] [Accepted: 07/26/2021] [Indexed: 11/16/2022] Open
Abstract
Many prokaryotes and eukaryotes utilize two-component signaling pathways to counter environmental stress and regulate virulence genes associated with infection. In this study, we identified and characterized a conserved histidine kinase (SsSln1), which is the sensor of the two-component system of Sln1-Ypd1-Ssk1 in Sporisorium scitamineum. SsSln1 null mutant exhibited enhanced mating and virulence capabilities in S. scitamineum, which is opposite to what has been reported in Candida albicans. Further investigations revealed that the deletion of SsSLN1 enhanced SsHog1 phosphorylation and nuclear localization and thus promoted S. scitamineum mating. Interestingly, SsSln1 and cAMP/PKA signaling pathways antagonistically regulated the transcription of pheromone-responsive transcription factor SsPrf1, for regulating S. scitamineum mating and virulence. In short, the study depicts a novel mechanism in which the cross-talk between SsSln1 and cAMP/PKA pathways antagonistically regulates mating and virulence by balancing the transcription of the SsPRF1 gene in S. scitamineum.
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Affiliation(s)
- Enping Cai
- College of Plant Protection, South China Agricultural University, Guangzhou 510642, China; (E.C.); (S.S.); (Y.D.); (P.H.); (X.S.)
- Integrate Microbiology Research Center, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou 510642, China;
| | - Shuquan Sun
- College of Plant Protection, South China Agricultural University, Guangzhou 510642, China; (E.C.); (S.S.); (Y.D.); (P.H.); (X.S.)
- Environmental Monitoring and Remediation Engineering Technology Research Center, School of Environmental Engineering, Yellow River Conservancy Technical Institute, Kaifeng 475004, China
| | - Yizhen Deng
- College of Plant Protection, South China Agricultural University, Guangzhou 510642, China; (E.C.); (S.S.); (Y.D.); (P.H.); (X.S.)
- Integrate Microbiology Research Center, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou 510642, China;
| | - Peishen Huang
- College of Plant Protection, South China Agricultural University, Guangzhou 510642, China; (E.C.); (S.S.); (Y.D.); (P.H.); (X.S.)
- Integrate Microbiology Research Center, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou 510642, China;
| | - Xian Sun
- College of Plant Protection, South China Agricultural University, Guangzhou 510642, China; (E.C.); (S.S.); (Y.D.); (P.H.); (X.S.)
- Integrate Microbiology Research Center, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou 510642, China;
| | - Yuting Wang
- Integrate Microbiology Research Center, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou 510642, China;
| | - Changqing Chang
- College of Plant Protection, South China Agricultural University, Guangzhou 510642, China; (E.C.); (S.S.); (Y.D.); (P.H.); (X.S.)
- Integrate Microbiology Research Center, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou 510642, China;
- Correspondence: (C.C.); (Z.J.); Tel.: +86-020-757-3225 (C.C.); +86-020-3860-4779 (Z.J.)
| | - Zide Jiang
- College of Plant Protection, South China Agricultural University, Guangzhou 510642, China; (E.C.); (S.S.); (Y.D.); (P.H.); (X.S.)
- Correspondence: (C.C.); (Z.J.); Tel.: +86-020-757-3225 (C.C.); +86-020-3860-4779 (Z.J.)
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14
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Zhou X, Li J, Tang N, Xie H, Fan X, Chen H, Tang M, Xie X. Genome-Wide Analysis of Nutrient Signaling Pathways Conserved in Arbuscular Mycorrhizal Fungi. Microorganisms 2021; 9:1557. [PMID: 34442636 PMCID: PMC8401276 DOI: 10.3390/microorganisms9081557] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/13/2021] [Accepted: 07/16/2021] [Indexed: 01/03/2023] Open
Abstract
Arbuscular mycorrhizal (AM) fungi form a mutualistic symbiosis with a majority of terrestrial vascular plants. To achieve an efficient nutrient trade with their hosts, AM fungi sense external and internal nutrients, and integrate different hierarchic regulations to optimize nutrient acquisition and homeostasis during mycorrhization. However, the underlying molecular networks in AM fungi orchestrating the nutrient sensing and signaling remain elusive. Based on homology search, we here found that at least 72 gene components involved in four nutrient sensing and signaling pathways, including cAMP-dependent protein kinase A (cAMP-PKA), sucrose non-fermenting 1 (SNF1) protein kinase, target of rapamycin kinase (TOR) and phosphate (PHO) signaling cascades, are well conserved in AM fungi. Based on the knowledge known in model yeast and filamentous fungi, we outlined the possible gene networks functioning in AM fungi. These pathways may regulate the expression of downstream genes involved in nutrient transport, lipid metabolism, trehalase activity, stress resistance and autophagy. The RNA-seq analysis and qRT-PCR results of some core genes further indicate that these pathways may play important roles in spore germination, appressorium formation, arbuscule longevity and sporulation of AM fungi. We hope to inspire further studies on the roles of these candidate genes involved in these nutrient sensing and signaling pathways in AM fungi and AM symbiosis.
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Affiliation(s)
- Xiaoqin Zhou
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Lingnan Guangdong Laboratory of Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China; (X.Z.); (H.X.); (X.F.); (H.C.)
| | - Jiangyong Li
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China;
| | - Nianwu Tang
- UMR Interactions Arbres/Microorganismes, Centre INRA-Grand Est-Nancy, 54280 Champenoux, France;
| | - Hongyun Xie
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Lingnan Guangdong Laboratory of Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China; (X.Z.); (H.X.); (X.F.); (H.C.)
| | - Xiaoning Fan
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Lingnan Guangdong Laboratory of Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China; (X.Z.); (H.X.); (X.F.); (H.C.)
| | - Hui Chen
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Lingnan Guangdong Laboratory of Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China; (X.Z.); (H.X.); (X.F.); (H.C.)
| | - Ming Tang
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Lingnan Guangdong Laboratory of Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China; (X.Z.); (H.X.); (X.F.); (H.C.)
| | - Xianan Xie
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Lingnan Guangdong Laboratory of Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China; (X.Z.); (H.X.); (X.F.); (H.C.)
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15
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Kwon H, Kevala K, Xin H, Patnaik S, Marugan J, Kim HY. Ligand-Induced GPR110 Activation Facilitates Axon Growth after Injury. Int J Mol Sci 2021; 22:ijms22073386. [PMID: 33806166 PMCID: PMC8037074 DOI: 10.3390/ijms22073386] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 03/20/2021] [Accepted: 03/22/2021] [Indexed: 12/14/2022] Open
Abstract
Recovery from axonal injury is extremely difficult, especially for adult neurons. Here, we demonstrate that the activation of G-protein coupled receptor 110 (GPR110, ADGRF1) is a mechanism to stimulate axon growth after injury. N-docosahexaenoylethanolamine (synaptamide), an endogenous ligand of GPR110 that promotes neurite outgrowth and synaptogenesis in developing neurons, and a synthetic GPR110 ligand stimulated neurite growth in axotomized cortical neurons and in retinal explant cultures. Intravitreal injection of GPR110 ligands following optic nerve crush injury promoted axon extension in adult wild-type, but not in gpr110 knockout, mice. In vitro axotomy or in vivo optic nerve injury rapidly induced the neuronal expression of gpr110. Activating the developmental mechanism of neurite outgrowth by specifically targeting GPR110 that is upregulated upon injury may provide a novel strategy for stimulating axon growth after nerve injury in adults.
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Affiliation(s)
- Heungsun Kwon
- Laboratory of Molecular Signaling, NIAAA, National Institutes of Health, 5625 Fishers Lane Room 3S-02, Rockville, MD 20892, USA; (H.K.); (K.K.)
| | - Karl Kevala
- Laboratory of Molecular Signaling, NIAAA, National Institutes of Health, 5625 Fishers Lane Room 3S-02, Rockville, MD 20892, USA; (H.K.); (K.K.)
| | - Hu Xin
- Division of Pre-Clinical Innovation, NCATS, National Institutes of Health, Rockville, MD 20852, USA; (H.X.); (S.P.); (J.M.)
| | - Samarjit Patnaik
- Division of Pre-Clinical Innovation, NCATS, National Institutes of Health, Rockville, MD 20852, USA; (H.X.); (S.P.); (J.M.)
| | - Juan Marugan
- Division of Pre-Clinical Innovation, NCATS, National Institutes of Health, Rockville, MD 20852, USA; (H.X.); (S.P.); (J.M.)
| | - Hee-Yong Kim
- Laboratory of Molecular Signaling, NIAAA, National Institutes of Health, 5625 Fishers Lane Room 3S-02, Rockville, MD 20892, USA; (H.K.); (K.K.)
- Correspondence: ; Tel.: +1-301-402-8746; Fax: +1-301-594-0035
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Wang J, Wang J, Shen T, Hong R, Tang S, Zhao X. H 2 S catalysed by CBS regulates testosterone synthesis through affecting the sulfhydrylation of PDE. J Cell Mol Med 2021; 25:3460-3468. [PMID: 33713531 PMCID: PMC8034449 DOI: 10.1111/jcmm.16428] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 11/03/2020] [Revised: 02/01/2021] [Accepted: 02/12/2021] [Indexed: 12/31/2022] Open
Abstract
Testosterone deficiency resulted in increased mortality in men. Our previous work found that hydrogen sulphide (H2S) significantly alleviated the spermatogenesis disorder. To investigate whether H2S could regulate testosterone synthesis and the relative signalling pathways. Disorder model of testosterone synthesis was constructed in vitro and in vivo. The cell viability was detected using CCK‐8 method. The concentration of H2S and testosterone were examined using ELISA kits. The relative mRNA and protein expression of CBS, PDE4A, PDE8A and proteins related to testosterone synthesis were detected by RT‐qPCR and western blotting. PAS staining was used to detect the inflammatory status of testis. The sulfhydryl level of PDE4A and PDE8A was determined by Biotin Switch Technique. CBS overexpression inhibited while knockdown promoted LPS + H2O2 induced injury in testosterone synthesis of MLTC‐1 cells, though regulating the level of H2S. The LPS + H2O2 induced inhibition on cAMP and p‐PKA was recovered by CBS overexpression, while addition of the specific inhibitor of PKA had opposite effects. CBS overexpression alleviated the inflammation status in testis and promoted the expression of StAR, P450scc, P450c17 and 3β‐HSD. CBS could also exhibit its protective role through promoting sulfhydrylation of PDE4A and PDE8A. H2S catalysed by CBS could recover testosterone synthesis in vitro and in vivo through inhibiting PDE expression via sulfhydryl modification and activating cAMP/PKA pathway.
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Affiliation(s)
- Jing Wang
- Department of Reproductive Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Jing Wang
- Department of Reproductive Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Tao Shen
- Department of Reproductive Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Renyun Hong
- Department of Reproductive Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Shanshan Tang
- Department of Reproductive Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Xia Zhao
- Department of Reproductive Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
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17
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Gong HJ, Lin JJ, Li H, Nan ZQ. A study on protective effect of morphine against myocardial ischemia-reperfusion injury in rats via CAMP/PKA signaling pathway. J BIOL REG HOMEOS AG 2020; 34:1669-1677. [PMID: 33111516 DOI: 10.23812/20-224-a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The purpose of this study was to explore the mitigating effect of morphine on the myocardial ischemia-reperfusion injury (MIRI) in rats through the cyclic adenosine monophosphate/protein kinase A (cAMP/PKA) pathway. A total of 30 male Wistar rats were assigned into sham group, MIRI group and morphine group using a random number table. The model of MIRI was routinely established. Then, the pathological changes in the morphology of myocardial tissues were observed via hematoxylin-eosin (HE) staining. The levels of the oxidative stress indicators superoxide dismutase (SOD) and malondialdehyde (MDA), the content of the inflammatory cytokine tumor necrosis factor alpha (TNF-α), interleukin-1 beta (IL-1β) and IL-6 and the quantity of glutathione peroxidase (GSH-Px), lactate dehydrogenase (LDH), creatine kinase (CK), CK-MB and cardiac troponin I (cTnI) in the myocardial enzyme spectrum were determined and analyzed through enzyme-linked immunosorbent assay (ELISA). Moreover, the messenger ribonucleic acid (mRNA) and protein expressions of cAMP, PKA, cAMP-response element binding protein (CREB) and phosphorylated CREB (p-CREB) in the cAMP/PKA signaling pathway in the myocardial tissues were measured using real-time polymerase chain reaction (PCR) and Western blotting, respectively. The results manifested that compared with those in MIRI group, the levels of myocardial infarct size, LDH, CK, CK-MB, cTnI, MDA, TNF-α, IL-1β, IL-6 and p-CREB were decreased, while the levels of GSH-Px, SOD, PKA and CREB were increased in the morphine group. In conclusion, morphine may mitigate MIRI in rats through the cAMP/PKA signaling pathway.
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Affiliation(s)
- H J Gong
- Department of Anesthesiology, Ningbo Yinzhou Second Hospital, Ningbo, China
| | - J J Lin
- Department of Anesthesiology, Ningbo Yinzhou Second Hospital, Ningbo, China
| | - H Li
- Department of Anesthesiology, Ningbo Yinzhou Second Hospital, Ningbo, China
| | - Z Q Nan
- Department of Anesthesiology, Wenzhou Central Hospital, Wenzhou, China
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Li J, Chen L, Li G, Chen X, Hu S, Zheng L, Luria V, Lv J, Sun Y, Xu Y, Yu Y. Sub-Acute Treatment of Curcumin Derivative J147 Ameliorates Depression-Like Behavior Through 5-HT 1A-Mediated cAMP Signaling. Front Neurosci 2020; 14:701. [PMID: 32733195 PMCID: PMC7360862 DOI: 10.3389/fnins.2020.00701] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 04/03/2020] [Accepted: 06/09/2020] [Indexed: 12/14/2022] Open
Abstract
Background Major depressive disorder (MDD) is a severe mental disorder related to the deficiency of monoamine neurotransmitters, particularly to abnormalities of 5-HT (5-hydroxytryptamine, serotonin) and its receptors. Our previous study suggested that acute treatment with a novel curcumin derivative J147 exhibited antidepressant-like effects by increasing brain derived neurotrophic factor (BDNF) level in the hippocampus of mice. The present study expanded upon our previous findings and investigated the antidepressant-like effects of sub-acute treatment of J147 for 3 days in male ICR mice and its possible relevancy to 5-HT1A and 5-HT1B receptors and downstream cAMP-BDNF signaling. Methods J147 at doses of 1, 3, and 9 mg/kg (via gavage) was administered for 3 days, and the anti-immobility time in the forced swimming and tail suspension tests (FST and TST) was recorded. The radioligand binding assay was used to determine the affinity of J147 to 5-HT1A and 5-HT1B receptor. Moreover, 5-HT1A or 5-HT1B agonist or its antagonist was used to determine which 5-HT receptor subtype is involved in the antidepressant-like effects of J147. The downstream signaling molecules such as cAMP, PKA, pCREB, and BDNF were also measured to determine the mechanism of action. Results The results demonstrated that sub-acute treatment of J147 remarkably decreased the immobility time in both the FST and TST in a dose-dependent manner. J147 displayed high affinity in vitro to 5-HT1A receptor prepared from mice cortical tissue and was less potent at 5-HT1B receptor. These effects of J147 were blocked by pretreatment with a 5-HT1A antagonist NAD-299 and enhanced by a 5-HT1A agonist 8-OH-DPAT. However, 5-HT1B receptor antagonist NAS-181 did not appreciably alter the effects of J147 on depression-like behaviors. Moreover, pretreatment with NAD-299 blocked J147-induced increases in cAMP, PKA, pCREB, and BDNF expression in the hippocampus, while 8-OH-DPAT enhanced the effects of J147 on these proteins’ expression. Conclusion The results suggest that J147 induces rapid antidepressant-like effects during a 3-day treatment period without inducing drug tolerance. These effects might be mediated by 5-HT1A-dependent cAMP/PKA/pCREB/BDNF signaling.
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Affiliation(s)
- Jianxin Li
- Department of Gastroenterology, Wenzhou No. 3 Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou, China
| | - Ling Chen
- Department of Clinical Pharmacology, Key Laboratory of Clinical Cancer Pharmacology and Toxicology Research of Zhejiang Province, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Gaowen Li
- Ningbo College of Health Sciences, Ningbo, China.,Department of Pharmaceutical Sciences, School of Pharmacy & Pharmaceutical Sciences, University at Buffalo, The State University of New York, Buffalo, NY, United States
| | - Xiaojuan Chen
- Department of Gastroenterology, Wenzhou No. 3 Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou, China
| | - Sisi Hu
- Department of Gastroenterology, Wenzhou No. 3 Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou, China
| | - Liang Zheng
- Department of Gastroenterology, Wenzhou No. 3 Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou, China
| | - Victor Luria
- Department of Systems Biology, Harvard Medical School, Boston, MA, United States
| | - Jinpeng Lv
- Department of Pharmaceutical Sciences, School of Pharmacy & Pharmaceutical Sciences, University at Buffalo, The State University of New York, Buffalo, NY, United States.,College of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, China
| | - Yindi Sun
- Department of Traditional Medical Orthopedics, Honghui Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Ying Xu
- Department of Pharmaceutical Sciences, School of Pharmacy & Pharmaceutical Sciences, University at Buffalo, The State University of New York, Buffalo, NY, United States
| | - Yingcong Yu
- Department of Gastroenterology, Wenzhou No. 3 Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou, China
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Kotarba G, Zielinska-Gorska M, Biernacka K, Gajewska A. Gonadotropin-releasing hormone-Cu complex (Cu-GnRH) transcriptional activity in vivo in the female rat anterior pituitary gland. Brain Res Bull 2020; 156:67-75. [PMID: 31931118 DOI: 10.1016/j.brainresbull.2020.01.005] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 12/23/2019] [Accepted: 01/03/2020] [Indexed: 12/01/2022]
Abstract
Unlike gonadotropin-releasing hormone (GnRH) analogues characterized by amino acid replacement in decapeptide primary structure, Cu-GnRH molecule preserves the native sequence but contains a Cu2+ ion stably bound to the nitrogen atoms including that of the imidazole ring of His2. Cu-GnRH can operate via cAMP/PKA signalling in anterior pituitary cells, suggesting that it may affect selected gonadotropic network gene transcription in vivo. We analysed pituitary mRNA expression of Egr-1, Nr5a1, and Lhb based on their role in luteinizing hormone (LH) synthesis; and Nos1, Adcyap1, and Prkaca due to their dependence on cAMP/PKA activity. In two independent experiments, ovariectomized rats received intracerebroventricular pulsatile (one pulse/h or two pulses/h over 5 h) microinjections of 2 nM Cu-GnRH; 2 nM antide (GnRH antagonist) + 2 nM Cu-GnRH; 100 nM PACAP6-38 (PACAP receptor antagonist) + 2 nM Cu-GnRH. Relative expression of selected mRNAs was determined by qRT-PCR. LH serum concentration was examined according to RIA. All examined genes responded to Cu-GnRH stimulation with increased transcriptional activity in a manner dependent on pulse frequency pattern. Increased expression of Nr5a1, Lhb, Nos1, Adcyap1, and Prkaca mRNA was observed solely in rats receiving the complex with frequency of two pulses/h over 5 h. Egr-1 transcription was up-regulated for both applied Cu-GnRH pulsatile patterns. The stimulatory effect of Cu-GnRH on gene transcription was dependent on both GnRH receptor and PAC-1 activation. In conclusion, obtained results indicate that Cu-GnRH complex is a GnRH analogue able to induce both IP3/PKC and cAMP/PKA-dependent gonadotrope network gene transcription in vivo.
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Affiliation(s)
- Grzegorz Kotarba
- Department of Animal Physiology, The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, 3 Instytucka St., 05-110 Jablonna, Poland.
| | - Marlena Zielinska-Gorska
- Department of Animal Physiology, The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, 3 Instytucka St., 05-110 Jablonna, Poland.
| | - Katarzyna Biernacka
- Department of Animal Physiology, The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, 3 Instytucka St., 05-110 Jablonna, Poland
| | - Alina Gajewska
- Department of Animal Physiology, The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, 3 Instytucka St., 05-110 Jablonna, Poland.
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20
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Affiliation(s)
- François L Mayer
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
| | - James W Kronstad
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada.
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21
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Lv J, Fu Y, Gao R, Li J, Kang M, Song G, Yun C. Diazepam enhances melanogenesis, melanocyte dendricity and melanosome transport via the PBR/ cAMP/PKA pathway. Int J Biochem Cell Biol 2019; 116:105620. [PMID: 31561018 DOI: 10.1016/j.biocel.2019.105620] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [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: 05/07/2019] [Revised: 09/16/2019] [Accepted: 09/23/2019] [Indexed: 12/13/2022]
Abstract
Diazepam is a medicament of the benzodiazepine family and it typically produces a sedative effect. Researchers have revealed that diazepam can induce melanogenesis and produce dendrite-like structures in B16 melanoma cells. However, the associated mechanisms of melanogenesis and phenotypic alterations have mostly remained unknown. In this study, we determined the effects of diazepam on melanogenesis, cellular phenotypic alterations, the location of melanosomes and the expression of relevant proteins in melanocytes using Masson-Fontana ammoniacal silver staining, scanning electron microscopy, immunocytochemistry and western blot analysis. Our results collectively indicated that diazepam had a pivotal role in melanocytes by enhancing melanin synthesis, melanocyte dendricity, melanosome trafficking, and capture at the dendrite tips. These functions might be attributed to the fact that diazepam activated the peripheral benzodiazepine receptor (PBR). This increased intracellular levels of cAMP, which stimulated the phosphorylation of cAMP response element-binding (CREB). As a result, this increased the tyrosinase, microphthalmia-associated transcription factor (MITF), Rab27a, Myosin Va, Rab17 and Cdc42 expression. This caused melanogenesis and melanosome transport. Therefore, our findings may provide a potential strategy for treating anti-hypopigmentation disorders.
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Affiliation(s)
- Jinpeng Lv
- College of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou 213000, China; Shanghai Institute of Pharmaceutical Industry, Shanghai 200000, China; Yabang Medical Research Institute, Changzhou 213000, China.
| | - Ying Fu
- College of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou 213000, China
| | - Rongyin Gao
- Department of Pharmacy, The first people's Hospital of Changzhou, The third Affiliated Hospital of Soochow University, Changzhou 213000, China
| | - Jiawen Li
- College of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou 213000, China
| | - Maofan Kang
- College of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou 213000, China
| | - Guoqiang Song
- College of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou 213000, China
| | - Changjun Yun
- Changzhou Wujin People's Hospital, Changzhou 213000, China
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22
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Nath P, Mukherjee U, Biswas S, Pal S, Das S, Ghosh S, Samanta A, Maitra S. Expression of nitric oxide synthase (NOS) in Anabas testudineus ovary and participation of nitric oxide-cyclic GMP cascade in maintenance of meiotic arrest. Mol Cell Endocrinol 2019; 496:110544. [PMID: 31419465 DOI: 10.1016/j.mce.2019.110544] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 08/11/2019] [Accepted: 08/12/2019] [Indexed: 12/12/2022]
Abstract
Participation of cyclic nucleotide-mediated signaling in nitric oxide/soluble guanylate cyclase (NO/sGC) regulation of oocyte maturation (OM) in perch (Anabas testudineus) follicle-enclosed oocytes has been investigated. Congruent with sharp decline in follicular cyclic GMP (cGMP) level, nitric oxide synthase (NOS)-inhibitor (L-NAME) attenuates protein kinase A (PKA) phosphorylation but promotes p-ERK1/2 and p-p34Cdc2 (Thr-161) in maturing oocytes. Conversely, NO donor (SNP) prevents OM, potentially through elevated cGMP synthesis. Expression and localization of Nos2 and Nos3 immunoreactivity in perch ovary varied considerably at progressively higher stages of folliculogenesis. While sGC inhibitor (ODQ) alone could induce OM, 8-bromo-cGMP attenuates 17,20β-P-induced OM indicating functional significance of NO/sGC/cGMP in perch ovary. Interestingly, high NO/cGMP inhibition of OM shows positive relation with elevated cAMP level. MIS induced OM is more susceptible to the oocyte-specific phosphodiesterase (PDE) 3 than PDE4 inhibition. Collectively, high NO/cGMP attenuation of OM potentially involves PDE3 inhibition, cAMP accumulation and PKA activation.
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Affiliation(s)
- Poulomi Nath
- Department of Zoology, Visva-Bharati University, Santiniketan, 731235, India
| | - Urmi Mukherjee
- Department of Zoology, Visva-Bharati University, Santiniketan, 731235, India
| | - Subhasri Biswas
- Department of Zoology, Visva-Bharati University, Santiniketan, 731235, India
| | - Soumojit Pal
- Department of Zoology, Visva-Bharati University, Santiniketan, 731235, India
| | - Sriparna Das
- Department of Zoology, Visva-Bharati University, Santiniketan, 731235, India
| | - Soumyajyoti Ghosh
- Department of Zoology, Visva-Bharati University, Santiniketan, 731235, India
| | - Anwesha Samanta
- Department of Zoology, Visva-Bharati University, Santiniketan, 731235, India
| | - Sudipta Maitra
- Department of Zoology, Visva-Bharati University, Santiniketan, 731235, India.
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23
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Evans F, Hernández JA, Chifflet S. Signaling pathways in cytoskeletal responses to plasma membrane depolarization in corneal endothelial cells. J Cell Physiol 2019; 235:2947-2962. [PMID: 31535377 DOI: 10.1002/jcp.29200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Accepted: 08/26/2019] [Indexed: 01/01/2023]
Abstract
In previous work, we reported that plasma membrane potential depolarization (PMPD) provokes cortical F-actin remodeling in bovine corneal endothelial (BCE) cells in culture, which eventually leads to the appearance of intercellular gaps. In kidney epithelial cells it has been shown that PMPD determines an extracellular-signal-regulated kinase (ERK)/Rho-dependent increase in diphosphorylated myosin light chain (ppMLC). The present study investigated the signaling pathways involved in the response of BCE cells to PMPD. Differently to renal epithelial cells, we observed that PMPD leads to a decrease in monophosphorylated MLC (pMLC) without affecting diphosphorylated MLC. Also, that the pMLC reduction is a consequence of cyclic adenosine 3',5'-monophosphate (cAMP)/protein kinase A (PKA) activation. In addition, we found evidence that the cAMP increase mostly depends on soluble adenylyl cyclase activity. Inhibition of this enzyme reduces the effect of PMPD on the cAMP rise, F-actin remodeling, and pMLC decrease. No changes in phosho-ERK were observed, although we could determine that RhoA undergoes activation. Our results suggested that active RhoA is not involved in the intercellular gap formation. Overall, the findings of this study support the view that, differently to renal epithelial cells, in BCE cells PMPD determines cytoskeletal reorganization via activation of the cAMP/PKA pathway.
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Affiliation(s)
- Frances Evans
- Departamento de Histología y Embriología, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Julio A Hernández
- Sección Biofísica, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Silvia Chifflet
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
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Wang T, Li B, Wang Z, Yuan X, Chen C, Zhang Y, Xia Z, Wang X, Yu M, Tao W, Zhang L, Wang X, Zhang Z, Guo X, Ning G, Feng S, Chen X. miR-155-5p Promotes Dorsal Root Ganglion Neuron Axonal Growth in an Inhibitory Microenvironment via the cAMP/PKA Pathway. Int J Biol Sci 2019; 15:1557-1570. [PMID: 31337984 PMCID: PMC6643145 DOI: 10.7150/ijbs.31904] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 04/29/2019] [Indexed: 12/13/2022] Open
Abstract
Sensory dysfunction post spinal cord injury causes patients great distress. Sciatic nerve conditioning injury (SNCI) has been shown to restore sensory function after spinal cord dorsal column injury (SDCL); however, the underlying mechanism of this recovery remains unclear. We performed a microarray assay to determine the associated miRNAs that might regulate the process of SNCI promoting SDCL repair. In total, 13 miRNAs were identified according to our inclusion criteria, and RT-qPCR was used to verify the microarray results. Among the 13 miRNAs, the miR-155-5p levels were decreased at 9 h, 3 d, 7 d, 14 d, 28 d, 2 m and 3 m timepoints in the SDCL group, while the SNCI group had a smaller decrease. Thus, miR-155-5p was chosen for further study after a literature review and an analysis with the TargetScan online tool. Specifically, miR-155-5p targets PKI-α, and the expression pattern of PKI-α was opposite that of miR-155-5p in both the SDCL and SNCI groups. Interestingly, miR-155-5p could promote dorsal root ganglion (DRG) neuron axon growth via the cAMP/PKA pathway and in a TNF-α, IL-1β or MAG inhibitory microenvironment in vitro. Furthermore, miR-155-5p could regulate the cAMP/PKA pathway and promote sensory conduction function recovery post dorsal column injury as detected by NF-200 immunohistochemistry, somatosensory-evoked potentials, BBB scale and tape removal test. Collectively, our results demonstrated that miR-155-5p participates in the molecular mechanism by which SNCI promotes the repair of SDCL and that upregulated miR-155-5p can repair SDCL by enhancing DRG neuron axon growth via the cAMP/PKA pathway. These findings suggest a novel treatment target for spinal cord injury.
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Affiliation(s)
- Tianyi Wang
- Department of Orthopedics, The 981st Hospital of the Chinese People's Liberation Army, Chengde 067000, Hebei Province, P.R. China
| | - Bo Li
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Zhijie Wang
- Department of Pediatric Internal Medicine, Affiliated Hospital of Chengde Medical University, Chengde 067000, Hebei Province, P.R. China
| | - Xin Yuan
- Department of Spine Surgery, Beijing Luhe Hospital, Capital Medical University, Beijing 100000, P.R. China
| | - Chuanjie Chen
- Department of Orthopedics, Chengde Central Hospital, Chengde 067000, Hebei Province, P.R. China
| | - Yanjun Zhang
- Department of Spine Surgery, Beijing Luhe Hospital, Capital Medical University, Beijing 100000, P.R. China
| | - Ziwei Xia
- Department of Orthopedics, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
| | - Xin Wang
- Chengde Medical University, Chengde 067000, Hebei Province, P.R. China
| | - Mei Yu
- Leukemia Center, Chinese Academy of Medical Sciences & Peking Union of Medical College, Institute of Hematology & Hospital of Blood Diseases, Tianjin 30020, P.R. China
| | - Wen Tao
- Chengde Medical University, Chengde 067000, Hebei Province, P.R. China
| | - Liang Zhang
- Department of Orthopedics, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
| | - Xu Wang
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Zheng Zhang
- Department of Orthopedics, The 981st Hospital of the Chinese People's Liberation Army, Chengde 067000, Hebei Province, P.R. China
| | - Xiaoling Guo
- Department of Neurology, The 981st Hospital of the Chinese People's Liberation Army, Chengde 067000, Hebei Province, P.R. China
| | - Guangzhi Ning
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China.,Tianjin Neurological Institute, Key Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin 300052, P.R. China
| | - Shiqing Feng
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China.,Tianjin Neurological Institute, Key Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin 300052, P.R. China
| | - Xueming Chen
- Department of Spine Surgery, Beijing Luhe Hospital, Capital Medical University, Beijing 100000, P.R. China
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25
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Osiro KO, Borgström C, Brink DP, Fjölnisdóttir BL, Gorwa-Grauslund MF. Exploring the xylose paradox in Saccharomyces cerevisiae through in vivo sugar signalomics of targeted deletants. Microb Cell Fact 2019; 18:88. [PMID: 31122246 PMCID: PMC6532234 DOI: 10.1186/s12934-019-1141-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Accepted: 05/17/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND There have been many successful strategies to implement xylose metabolism in Saccharomyces cerevisiae, but no effort has so far enabled xylose utilization at rates comparable to that of glucose (the preferred sugar of this yeast). Many studies have pointed towards the engineered yeast not sensing that xylose is a fermentable carbon source despite growing and fermenting on it, which is paradoxical. We have previously used fluorescent biosensor strains to in vivo monitor the sugar signalome in yeast engineered with xylose reductase and xylitol dehydrogenase (XR/XDH) and have established that S. cerevisiae senses high concentrations of xylose with the same signal as low concentration of glucose, which may explain the poor utilization. RESULTS In the present study, we evaluated the effects of three deletions (ira2∆, isu1∆ and hog1∆) that have recently been shown to display epistatic effects on a xylose isomerase (XI) strain. Through aerobic and anaerobic characterization, we showed that the proposed effects in XI strains were for the most part also applicable in the XR/XDH background. The ira2∆isu1∆ double deletion led to strains with the highest specific xylose consumption- and ethanol production rates but also the lowest biomass titre. The signalling response revealed that ira2∆isu1∆ changed the low glucose-signal in the background strain to a simultaneous signalling of high and low glucose, suggesting that engineering of the signalome can improve xylose utilization. CONCLUSIONS The study was able to correlate the previously proposed beneficial effects of ira2∆, isu1∆ and hog1∆ on S. cerevisiae xylose uptake, with a change in the sugar signalome. This is in line with our previous hypothesis that the key to resolve the xylose paradox lies in the sugar sensing and signalling networks. These results indicate that the future engineering targets for improved xylose utilization should probably be sought not in the metabolic networks, but in the signalling ones.
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Affiliation(s)
- Karen O Osiro
- Applied Microbiology, Department of Chemistry, Lund University, Lund, Sweden
| | - Celina Borgström
- Applied Microbiology, Department of Chemistry, Lund University, Lund, Sweden
| | - Daniel P Brink
- Applied Microbiology, Department of Chemistry, Lund University, Lund, Sweden
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26
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Sun G, Qi X, Wilson RA. A Feed-Forward Subnetwork Emerging from Integrated TOR- and cAMP/PKA-Signaling Architecture Reinforces Magnaporthe oryzae Appressorium Morphogenesis. Mol Plant Microbe Interact 2019; 32:593-607. [PMID: 30431400 DOI: 10.1094/mpmi-10-18-0287-r] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Appressoria are important mediators of plant-microbe interactions. In the devastating rice blast pathogen Magnaporthe oryzae, appressorial morphogenesis from germ tube tips requires activated cAMP/PKA signaling and inactivated TOR signaling (TORoff). TORoff temporarily arrests G2 at a metabolic checkpoint during the single round of mitosis that occurs following germination. G2 arrest induces autophagy and appressorium formation concomitantly, allowing reprogression of the cell cycle to G1/G0 quiescence and a single appressorial nucleus. Inappropriate TOR activation abrogates G2 arrest and inhibits cAMP/PKA signaling downstream of cPKA. This results in multiple rounds of germ tube mitosis and the loss of autophagy and appressoria formation. How cAMP/PKA signaling connects to cell cycle progression and autophagy is not known. To address this, we interrogated TOR and cAMP/PKA pathways using signaling mutants, different surface properties, and specific cell cycle inhibitors and discovered a feed-forward subnetwork arising from TOR- and cAMP/PKA-signaling integration. This adenylate cyclase-cAMP-TOR-adenylate cyclase subnetwork reinforces cAMP/PKA-dependent appressorium formation under favorable environmental conditions. Under unfavorable conditions, the subnetwork collapses, resulting in reversible cell cycle-mediated germ tube growth regardless of external nutrient status. Collectively, this work provides new molecular insights on germ tube morphogenetic decision-making in response to static and dynamic environmental conditions.
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Affiliation(s)
- Guangchao Sun
- Department of Plant Pathology, University of Nebraska-Lincoln, Lincoln, NE, U.S.A
| | - Xiaobo Qi
- Department of Plant Pathology, University of Nebraska-Lincoln, Lincoln, NE, U.S.A
| | - Richard A Wilson
- Department of Plant Pathology, University of Nebraska-Lincoln, Lincoln, NE, U.S.A
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27
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Copf T, Kamara M, Venkatesh T. Axon length maintenance and synapse integrity are regulated by c-AMP-dependent protein kinase A (PKA) during larval growth of the drosophila sensory neurons. J Neurogenet 2019; 33:157-163. [PMID: 30955404 DOI: 10.1080/01677063.2019.1586896] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Axonal extension and synaptic targeting are usually completed during early development, but the axonal length and synaptic integrity need to be actively maintained during later developmental stages and the adult life. Failure in the axonal length maintenance and the subsequent axonal degeneration have been associated with neurological disorders, but currently little is known about the genetic factors controlling this process. Here, we show that regulated intracellular levels of cAMP-dependent protein kinase A (PKA) are critical for the axon maintenance during the transition from the early to the later larval stages in the Drosophila class IV dendritic arborization (da) sensory neurons. Our data indicate that when the intracellular levels of PKA are increased via genetic manipulations, these peripheral neurons initially form synapses with wild-type appearance, at their predicted ventral nerve cord (VNC) target sites (in the first and second instar larval stages), but that their synapses disintegrate, and the axons retract and become fragmented in the subsequent larval stages (third larval stage). The affected axonal endings at the disintegrated synaptic sites still express the characteristic presynaptic and cytoskeletal markers such as Bruchpilot and Fascin, indicating that the synapse had been initially properly formed, but that it later lost its integrity. Finally, the phenotype is significantly more prominent in the axons of the neurons whose cell bodies are located in the posterior body segments. We propose that the reason for this is the fact that during the larval development the posterior neurons face a much greater challenge while trying to keep up with the fast-paced growth of the larval body, and that PKA is critical for this process. Our data reveal PKA as a novel factor in the axonal length and synapse integrity maintenance in sensory neurons. These results could be of help in understanding neurological disorders characterized by destabilized synapses.
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Affiliation(s)
- Tijana Copf
- a Department of Biology, City College of New York , City University of New York (CUNY) , New York , NY , USA.,b Institute of Molecular Biology and Biotechnology , Heraklion , Greece
| | - Mildred Kamara
- a Department of Biology, City College of New York , City University of New York (CUNY) , New York , NY , USA
| | - Tadmiri Venkatesh
- a Department of Biology, City College of New York , City University of New York (CUNY) , New York , NY , USA
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28
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Abstract
Studies have shown that papaverine can inhibit lipopolysaccharide (LPS)-induced microglial activation. The retinal primary microglia of newborn SD rats were isolated and purified, and a LPS-induced microglia activation model was established. The protein phosphorylation level of the signaling pathway was detected by western blotting. The transcription and expression of TNF-α, IL-1β, and IL-10 were respectively detected by RT-PCR and ELISA to observe the abnormal activation of primary microglia. The cAMP inhibitor Rp-isomer, PKA inhibitor H89, and MEK inhibitor U0126 were separately added to further investigate the role of MEK/Erk in PAP inhibition of primary microglial activation and the relationship between cAMP/PKA and MEK/Erk. It was found that the level of MEK phosphorylation was upregulated after LPS stimulation, which was blocked by 10 μg/ml of papaverine.10μM U0126 significantly inhibited TNF-α and IL-1β and increased IL-10 transcription and expression in retinal microglia (P < 0.01). Both Rp-isomer and H89 upregulated the phosphorylation levels of MEK and Erk. Papaverine may inhibit inflammatory factors and promote the expression of anti-inflammatory factors through the cAMP/PKA and MEK/Erk pathway, thereby inhibiting LPS-induced activation of primary retinal microglia, and the MEK/Erk pathway may be partially regulated by cAMP/PKA, which can provide theoretical basis and experimental basis for its protection of the central nervous system.
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29
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Liu XH, Zhu RT, Hao B, Shi YW, Wang XG, Xue L, Zhao H. Norepinephrine Induces PTSD-Like Memory Impairments via Regulation of the β-Adrenoceptor- cAMP/PKA and CaMK II/PKC Systems in the Basolateral Amygdala. Front Behav Neurosci 2019; 13:43. [PMID: 30894805 PMCID: PMC6414421 DOI: 10.3389/fnbeh.2019.00043] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 11/13/2018] [Accepted: 02/18/2019] [Indexed: 11/13/2022] Open
Abstract
Glucocorticoids (GCs) can modulate the memory enhancement process during stressful events, and this modulation requires arousal-induced norepinephrine (NE) activation in the basolateral amygdale (BLA). Our previous study found that an intrahippocampal infusion of propranolol dose-dependently induced post-traumatic stress disorder (PTSD)-like memory impairments. To explore the role of the noradrenergic system of the BLA in PTSD-like memory impairment, we injected various doses of NE into the BLA. We found that only a specific quantity of NE (0.3 μg) could induce PTSD-like memory impairments, accompanied by a reduction in phosphorylation of GluR1 at Ser845 and Ser831. Moreover, this phenomenon could be blocked by a protein kinase A (PKA) inhibitor or calcium/calmodulin-dependent protein kinase II (CaMK II) inhibitor. These findings demonstrate that NE could induce PTSD-like memory impairments via regulation of the β-adrenoceptor receptor (β-AR)-3′,5′-cyclic monophosphate (cAMP)/PKA and CaMK II/PKC signaling pathways.
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Affiliation(s)
- Xiang-Hui Liu
- Faculty of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Rong-Ting Zhu
- Faculty of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Bo Hao
- Faculty of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Yan-Wei Shi
- Faculty of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Guangdong Province Translational Forensic Medicine Engineering Technology Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Xiao-Guang Wang
- Faculty of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Guangdong Province Translational Forensic Medicine Engineering Technology Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Li Xue
- Faculty of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Guangdong Province Translational Forensic Medicine Engineering Technology Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Hu Zhao
- Faculty of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Guangdong Province Translational Forensic Medicine Engineering Technology Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
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30
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Tabrizian K, Hashemzaei M, Nasiri AA, Najafi S, Amelinia F, Sanati M, Shamshirgaran F, Fanoudi S. Interactive involvement of hippocampal cAMP/PKA and cyclooxygenase-2 signaling pathways in spatial learning in the Morris water maze. Folia Neuropathol 2018; 56:58-66. [PMID: 29663741 DOI: 10.5114/fn.2018.74660] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Accumulated evidence shows that the cAMP-PKA signaling pathway plays a key role in memory functions. Cyclooxygenase-2, a critical player in neuroinflammation, has been confirmed in the pathogenesis of neurodegenerative diseases. This study is aimed to assess the effect of the interaction of cAMP-PKA and cyclooxygenase pathways on spatial memory acquisition in animal models. MATERIAL AND METHODS In the present study, the effects of the four-day bilateral intra-hippocampal infusions of H-89 as a protein kinase AII inhibitor (10 µM/side), celecoxib (0.1 M/side) as a selective cyclooxygenase-2 inhibitor, cele-coxib/H-89 and bucladesine (10 µM/side)/celecoxib/H-89 on spatial memory acquisition in the Morris water maze were investigated. Control animals received bilateral intra-hippocampal infusions of dimethyl sulfoxide. Rats were trained for 4 days; each day included one block of four trials. Post-training probe trial tests were performed on day five. RESULTS A bilateral intra-hippocampal infusion of H-89 and celecoxib led to a significant impairment in spatial learning compared to the controls through a notable decrease in escape latency and traveled distance. But, combination treatment of animals with celecoxib/H-89 and bucladesine/celecoxib/H-89 could considerably reverse celecoxib and H-89-induced spatial memory acquisition impairments in the Morris water maze. CONCLUSIONS These results indicate the probable regulatory effects of cAMP/PKA and cyclooxygenase-2 signaling pathways on spatial memory acquisition in the Morris water maze.
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Khedr RM, Ahmed AAE, Kamel R, Raafat EM. Sitagliptin attenuates intestinal ischemia/reperfusion injury via cAMP/PKA, PI3K/Akt pathway in a glucagon-like peptide 1 receptor-dependent manner. Life Sci 2018; 211:31-39. [PMID: 30195035 DOI: 10.1016/j.lfs.2018.09.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 08/07/2018] [Accepted: 09/03/2018] [Indexed: 12/21/2022]
Abstract
AIMS This study investigated the effect of sitagliptin prophylactic treatment on intestinal I/R rat model and explored the possible underlying mechanism. MAIN METHODS Forty-five male Sprague-Dawley rats were randomly assigned to 3 groups: Sham group (operation without clamping), I/R group (operation with clamping) and sitagliptin pretreated group (300 mg/kg/day; p.o.) for 2 weeks before I/R insult. Intestinal I/R was performed by clamping the superior mesenteric artery for 30 min, followed by 60 min reperfusion after removal of clamping. At the end of the experimental period, all rats were sacrificed for histopathological, biochemical, PCR and western blot assessment. KEY FINDINGS Pretreatment with sitagliptin remarkably alleviated the pathological changes induced by I/R in the jejunum, suppressed upregulated NF-κB, TNF-α, IL-1βand MPO caused by I/R. Moreover, sitagliptin decreased the Bax/Bcl-2 ratio and accordingly suppressed apoptotic tissue damage as reflected by a caspase-3 level reduction in rat intestine subjected to I/R injury. Interestingly, sitagliptin could obviously increase the active GLP-1 level and GLP-1 receptor mRNA expression in the jejunum of I/R rats. This was associated with the augmentation of the cAMP level and enhancement of PKA activity. Simultaneously, sitagliptin treatment was able to increase the protein expression levels of phosphorylated PI3K and Akt. SIGNIFICANCE Sitagliptin has shown protective effects against intestinal I/R injury in rats through reduction of intestinal inflammation and apoptosis. The molecular mechanisms may be partially correlated with activation of cAMP/PKA and PI3K/Akt signaling pathway by the GLP-1/GLP-1 receptor.
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Affiliation(s)
- Rehab M Khedr
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt.
| | - Amany A E Ahmed
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Rehab Kamel
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt; Pharmacology and Toxicology Department, Faculty of Pharmacy, Ahram Canadian University, Cairo, Egypt
| | - Eman M Raafat
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
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Osiro KO, Brink DP, Borgström C, Wasserstrom L, Carlquist M, Gorwa-Grauslund MF. Assessing the effect of d-xylose on the sugar signaling pathways of Saccharomyces cerevisiae in strains engineered for xylose transport and assimilation. FEMS Yeast Res 2018. [PMID: 29315378 DOI: 10.1093/femsyr/fox096/4791530] [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] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023] Open
Abstract
One of the challenges of establishing an industrially competitive process to ferment lignocellulose to value-added products using Saccharomyces cerevisiae is to get efficient mixed sugar fermentations. Despite successful metabolic engineering strategies, the xylose assimilation rates of recombinant S. cerevisiae remain significantly lower than for the preferred carbon source, glucose. Previously, we established a panel of in vivo biosensor strains (TMB371X) where different promoters (HXT1/2/4p; SUC2p, CAT8p; TPS1p/2p, TEF4p) from the main sugar signaling pathways were coupled with the yEGFP3 gene, and observed that wild-type S. cerevisiae cannot sense extracellular xylose. Here, we expand upon these strains by adding a mutated galactose transporter (GAL2-N376F) with improved xylose affinity (TMB372X), and both the transporter and an oxidoreductase xylose pathway (TMB375X). On xylose, the TMB372X strains displayed population heterogeneities, which disappeared when carbon starvation was relieved by the addition of the xylose assimilation pathway (TMB375X). Furthermore, the signal in the TMB375X strains on high xylose (50 g/L) was very similar to the signal recorded on low glucose (≤5 g/L). This suggests that intracellular xylose triggers a similar signal to carbon limitation in cells that are actively metabolizing xylose, in turn causing the low assimilation rates.
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Affiliation(s)
- Karen O Osiro
- Applied Microbiology, Department of Chemistry, Lund University, Kemicentrum, Naturvetarvägen 14, Lund 223 62, Sweden
| | - Daniel P Brink
- Applied Microbiology, Department of Chemistry, Lund University, Kemicentrum, Naturvetarvägen 14, Lund 223 62, Sweden
| | - Celina Borgström
- Applied Microbiology, Department of Chemistry, Lund University, Kemicentrum, Naturvetarvägen 14, Lund 223 62, Sweden
| | - Lisa Wasserstrom
- Applied Microbiology, Department of Chemistry, Lund University, Kemicentrum, Naturvetarvägen 14, Lund 223 62, Sweden
| | - Magnus Carlquist
- Applied Microbiology, Department of Chemistry, Lund University, Kemicentrum, Naturvetarvägen 14, Lund 223 62, Sweden
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Ho HJ, Shirakawa H, Giriwono PE, Ito A, Komai M. A novel function of geranylgeraniol in regulating testosterone production. Biosci Biotechnol Biochem 2018; 82:956-962. [PMID: 29303051 DOI: 10.1080/09168451.2017.1415129] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Isoprenoids play widely differing roles in various physiological processes in animals and plants. Geranylgeraniol (GGOH) is an isoprenoid found in plants, and is an important metabolic derivative in the isoprenoid/cholesterol synthesis pathway. Earlier studies focused on GGOH's ability to improve the side effects of bisphosphonate therapy by regulating the mevalonate pathway. More recently, the mevalonate pathway-independent effects of GGOH have been described, including anti-inflammatory, anti-tumorigenic, and neuroprotective activities. It is noteworthy that GGOH regulates the steroidogenesis pathway in testis-derived I-10 tumor cells. Testosterone is a hormone produced via steroidogenesis in testicles and plays a role in fetal development and the male reproductive system. GGOH enhanced testosterone and progesterone (its precursor) levels in I-10 cells by activating adenylate cyclase via cAMP/PKA signaling, without altering phosphodiesterase activity. These findings highlight the potential benefits of GGOH as a therapeutic agent for low testosterone levels, such as late-onset hypogonadism in men.
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Affiliation(s)
- Hsin-Jung Ho
- a Laboratory of Nutrition, Graduate School of Agricultural Science , Tohoku University , Sendai , Japan
| | - Hitoshi Shirakawa
- a Laboratory of Nutrition, Graduate School of Agricultural Science , Tohoku University , Sendai , Japan.,b International Education and Research Center for Food Agricultural Immunology, Graduate School of Agricultural Science , Tohoku University , Sendai , Japan
| | - Puspo E Giriwono
- a Laboratory of Nutrition, Graduate School of Agricultural Science , Tohoku University , Sendai , Japan.,c Southeast Asian Food & Agriculture Science & Technology (SEAFAST) Center , Bogor Agricultural University , Bogor , Indonesia
| | - Asagi Ito
- a Laboratory of Nutrition, Graduate School of Agricultural Science , Tohoku University , Sendai , Japan
| | - Michio Komai
- a Laboratory of Nutrition, Graduate School of Agricultural Science , Tohoku University , Sendai , Japan
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Wu HY, Tang XQ, Liu H, Mao XF, Wang YX. Both classic Gs- cAMP/PKA/CREB and alternative Gs-cAMP/PKA/p38β/CREB signal pathways mediate exenatide-stimulated expression of M2 microglial markers. J Neuroimmunol 2017; 316:17-22. [PMID: 29249556 DOI: 10.1016/j.jneuroim.2017.12.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Revised: 11/22/2017] [Accepted: 12/11/2017] [Indexed: 12/14/2022]
Abstract
GLP-1 receptor agonists, exenatide and GLP-1, promoted M2 type polarization in monocytes/macrophages and microglial cells. This study explored the signal basis underlying exenatide-stimulated expression of M2 microglia-specific genes, including the cytoplasmic marker Arg 1, surface marker CD206, and secretion protein marker IL-4. Treatment with exenatide in cultured primary microglial cells concentration dependently stimulated the expression of Arg 1, CD206 and IL-4, but did not significantly alter LPS-stimulated expression of TNF-α, IL-1β and IL-6. The stimulatory effects of exenatide were completely prevented by the GLP-1 receptor antagonist exendin(9-39), but not altered by application of LPS. Furthermore, the adenylyl cyclase inhibitor DDA, PKA inhibitor H89 and CREB inhibitor KG501 completely blocked exenatide-induced overexpression of Arg 1, CD206 and IL-4. In addition, exenatide-stimulated expression of Arg 1 and CD206 was totally blocked by the p38 MAPK inhibitor SB203580 and gene silencer siRNA/p38β (but not siRNA/p38α), whereas the expressed IL-4 was not significantly altered by the p38 inhibitor or other MAPK subtype inhibitors. These findings revealed that both classic Gs-cAMP/PKA/CREB and alternative Gs-cAMP/PKA/p38β/CREB mediated GLP-1 receptor agonism-induced overexpression of M2 microglial biomarkers.
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Affiliation(s)
- Hai-Yun Wu
- King's Lab, Shanghai Jiao Tong University School of Pharmacy, 800 Dongchuan Road, Shanghai 200240, China
| | - Xue-Qi Tang
- King's Lab, Shanghai Jiao Tong University School of Pharmacy, 800 Dongchuan Road, Shanghai 200240, China
| | - Hao Liu
- King's Lab, Shanghai Jiao Tong University School of Pharmacy, 800 Dongchuan Road, Shanghai 200240, China
| | - Xiao-Fang Mao
- King's Lab, Shanghai Jiao Tong University School of Pharmacy, 800 Dongchuan Road, Shanghai 200240, China
| | - Yong-Xiang Wang
- King's Lab, Shanghai Jiao Tong University School of Pharmacy, 800 Dongchuan Road, Shanghai 200240, China.
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Monterisi S, Lobo MJ, Livie C, Castle JC, Weinberger M, Baillie G, Surdo NC, Musheshe N, Stangherlin A, Gottlieb E, Maizels R, Bortolozzi M, Micaroni M, Zaccolo M. PDE2A2 regulates mitochondria morphology and apoptotic cell death via local modulation of cAMP/PKA signalling. eLife 2017; 6:e21374. [PMID: 28463107 PMCID: PMC5423767 DOI: 10.7554/elife.21374] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Accepted: 04/29/2017] [Indexed: 01/31/2023] Open
Abstract
cAMP/PKA signalling is compartmentalised with tight spatial and temporal control of signal propagation underpinning specificity of response. The cAMP-degrading enzymes, phosphodiesterases (PDEs), localise to specific subcellular domains within which they control local cAMP levels and are key regulators of signal compartmentalisation. Several components of the cAMP/PKA cascade are located to different mitochondrial sub-compartments, suggesting the presence of multiple cAMP/PKA signalling domains within the organelle. The function and regulation of these domains remain largely unknown. Here, we describe a novel cAMP/PKA signalling domain localised at mitochondrial membranes and regulated by PDE2A2. Using pharmacological and genetic approaches combined with real-time FRET imaging and high resolution microscopy, we demonstrate that in rat cardiac myocytes and other cell types mitochondrial PDE2A2 regulates local cAMP levels and PKA-dependent phosphorylation of Drp1. We further demonstrate that inhibition of PDE2A, by enhancing the hormone-dependent cAMP response locally, affects mitochondria dynamics and protects from apoptotic cell death.
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Affiliation(s)
- Stefania Monterisi
- Department of Physiology Anatomy and Genetics, University of Oxford, Oxford, United Kingdom
- BHF Centre of Research Excellence, University of Oxford, Oxford, United Kingdom
| | - Miguel J Lobo
- Department of Physiology Anatomy and Genetics, University of Oxford, Oxford, United Kingdom
- BHF Centre of Research Excellence, University of Oxford, Oxford, United Kingdom
| | - Craig Livie
- Institute of Neuroscioence and Psychology, University of Glasgow, Glasgow, United Kingdom
| | - John C Castle
- Department of Physiology Anatomy and Genetics, University of Oxford, Oxford, United Kingdom
- BHF Centre of Research Excellence, University of Oxford, Oxford, United Kingdom
| | - Michael Weinberger
- Department of Physiology Anatomy and Genetics, University of Oxford, Oxford, United Kingdom
- BHF Centre of Research Excellence, University of Oxford, Oxford, United Kingdom
| | - George Baillie
- Institute of Cardiovascular and Medical Science, University of Glasgow, Glasgow, United Kingdom
| | - Nicoletta C Surdo
- Department of Physiology Anatomy and Genetics, University of Oxford, Oxford, United Kingdom
- BHF Centre of Research Excellence, University of Oxford, Oxford, United Kingdom
| | - Nshunge Musheshe
- Department of Molecular Pharmacology, University of Groningen, Groningen, The Netherlands
| | - Alessandra Stangherlin
- Institute of Neuroscioence and Psychology, University of Glasgow, Glasgow, United Kingdom
| | - Eyal Gottlieb
- Beatson Institute, University of Glasgow, Glasgow, United Kingdom
| | - Rory Maizels
- Department of Physiology Anatomy and Genetics, University of Oxford, Oxford, United Kingdom
- BHF Centre of Research Excellence, University of Oxford, Oxford, United Kingdom
| | - Mario Bortolozzi
- Department of Physics and Astronomy “G. Galilei”, University of Padova, Padova, Italy
- Venetian Institute of Molecular Medicine, University of Padova, Padova, Italy
| | - Massimo Micaroni
- Swedish National Centre for Cellular Imaging, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Manuela Zaccolo
- Department of Physiology Anatomy and Genetics, University of Oxford, Oxford, United Kingdom
- BHF Centre of Research Excellence, University of Oxford, Oxford, United Kingdom
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Abstract
Bipolar disorder is characterized by a host of sleep-wake abnormalities that suggests that the reticular activating system (RAS) is involved in these symptoms. One of the signs of the disease is a decrease in high frequency gamma band activity, which accounts for a number of additional deficits. Bipolar disorder has also been found to overexpress neuronal calcium sensor protein 1 (NCS-1). Recent studies showed that elements in the RAS generate gamma band activity that is mediated by high threshold calcium (Ca2+) channels. This mini-review provides a description of recent findings on the role of Ca2+ and Ca2+ channels in bipolar disorder, emphasizing the involvement of arousal-related systems in the manifestation of many of the disease symptoms. This will hopefully bring attention to a much-needed area of research and provide novel avenues for therapeutic development.
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Affiliation(s)
- Stasia D'Onofrio
- Center for Translational Neuroscience, University of Arkansas for Medical Sciences, Little Rock, AR
| | - Susan Mahaffey
- Center for Translational Neuroscience, University of Arkansas for Medical Sciences, Little Rock, AR
| | - Edgar Garcia-Rill
- Center for Translational Neuroscience, University of Arkansas for Medical Sciences, Little Rock, AR
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Kan QC, Zhang HJ, Zhang Y, Li X, Xu YM, Thome R, Zhang ML, Liu N, Chu YJ, Zhang GX, Zhu L. Matrine Treatment Blocks NogoA-Induced Neural Inhibitory Signaling Pathway in Ongoing Experimental Autoimmune Encephalomyelitis. Mol Neurobiol 2017; 54:8404-18. [PMID: 27933584 DOI: 10.1007/s12035-016-0333-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 11/29/2016] [Indexed: 12/17/2022]
Abstract
Myelin-associated inhibitors, such as NogoA, myelin-associated glycoprotein (MAG), and oligodendrocyte myelin glycoprotein (OMgp), play a pivotal role in the lack of neuroregeneration in multiple sclerosis, an inflammatory demyelinating disease of the central nervous system (CNS). Matrine (MAT), a monomer that is used in traditional Chinese medicine as an anti-inflammatory agent, has shown beneficial effects in experimental autoimmune encephalomyelitis (EAE), an animal model of MS. However, the underlying mechanisms of MAT-induced EAE amelioration are not fully understood. In the present study, we show that MAT treatment suppressed ongoing EAE, and this effect correlated with an increased expression of growth-associated protein 43, an established marker for axonal regeneration. MAT treatment significantly reduced the levels of NogoA, its receptor complex NgR/p75NTR/LINGO-1, and their downstream RhoA/ROCK signaling pathway in the CNS. In contrast, intracellular cyclic AMP (cAMP) levels and its protein kinase (protein kinase A (PKA)), which can promote axonal regrowth by inactivating the RhoA, were upregulated. Importantly, adding MAT in primary astrocytes in vitro largely induced cAMP/PKA expression, and blockade of cAMP significantly diminished MAT-induced expression of PKA and production of BDNF, a potent neurotrophic factor for neuroregeneration. Taken together, our findings demonstrate that the beneficial effects of MAT on EAE can be attributed not only to its capacity for immunomodulation, but also to its directly promoting regeneration of the injured CNS.
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Brink DP, Borgström C, Tueros FG, Gorwa-Grauslund MF. Real-time monitoring of the sugar sensing in Saccharomyces cerevisiae indicates endogenous mechanisms for xylose signaling. Microb Cell Fact 2016; 15:183. [PMID: 27776527 PMCID: PMC5078928 DOI: 10.1186/s12934-016-0580-x] [Citation(s) in RCA: 18] [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] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Accepted: 10/14/2016] [Indexed: 12/03/2022] Open
Abstract
Background The sugar sensing and carbon catabolite repression in Baker’s yeast Saccharomyces cerevisiae is governed by three major signaling pathways that connect carbon source recognition with transcriptional regulation. Here we present a screening method based on a non-invasive in vivo reporter system for real-time, single-cell screening of the sugar signaling state in S. cerevisiae in response to changing carbon conditions, with a main focus on the response to glucose and xylose. Results The artificial reporter system was constructed by coupling a green fluorescent protein gene (yEGFP3) downstream of endogenous yeast promoters from the Snf3p/Rgt2p, SNF1/Mig1p and cAMP/PKA signaling pathways: HXT1p/2p/4p; SUC2p, CAT8p; TPS1p/2p and TEF4p respectively. A panel of eight biosensors strains was generated by single copy chromosomal integration of the different constructs in a W303-derived strain. The signaling biosensors were validated for their functionality with flow cytometry by comparing the fluorescence intensity (FI) response in the presence of high or nearly depleted glucose to the known induction/repression conditions of the eight different promoters. The FI signal correlated with the known patterns of the selected promoters while maintaining a non-invasive property on the cellular phenotype, as was demonstrated in terms of growth, metabolites and enzyme activity. Conclusions Once verified, the sensors were used to evaluate the signaling response to varying conditions of extracellular glucose, glycerol and xylose by screening in 96-well microtiter plates. We show that these yeast strains, which do not harbor any recombinant pathways for xylose utilization, are lacking a signaling response for extracellular xylose. However, for the HXT2p/4p sensors, a shift in the flow cytometry population dynamics indicated that internalized xylose does affect the signaling. These results suggest that the previously observed effects of this pentose on the S. cerevisiae physiology and gene regulation can be attributed to xylose and not only to a lack of glucose. Electronic supplementary material The online version of this article (doi:10.1186/s12934-016-0580-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Daniel P Brink
- Applied Microbiology, Department of Chemistry, Lund University, P.O. Box 124, 22100, Lund, Sweden.
| | - Celina Borgström
- Applied Microbiology, Department of Chemistry, Lund University, P.O. Box 124, 22100, Lund, Sweden
| | - Felipe G Tueros
- Applied Microbiology, Department of Chemistry, Lund University, P.O. Box 124, 22100, Lund, Sweden
| | - Marie F Gorwa-Grauslund
- Applied Microbiology, Department of Chemistry, Lund University, P.O. Box 124, 22100, Lund, Sweden
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Astort F, Repetto EM, Rocha-Viegas L, Mercau ME, Puch SS, Finkielstein CV, Pecci A, Cymeryng CB. Role of CREB on heme oxygenase-1 induction in adrenal cells: involvement of the PI3K pathway. J Mol Endocrinol 2016; 57:113-24. [PMID: 27412767 DOI: 10.1530/jme-16-0005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 06/10/2016] [Indexed: 12/23/2022]
Abstract
In addition to the well-known function of ACTH as the main regulator of adrenal steroidogenesis, we have previously demonstrated its effect on the transcriptional stimulation of HO-1 expression, a component of the cellular antioxidant defense system. In agreement, we hereby demonstrate that, in adrenocortical Y1 cells, HO-1 induction correlates with a significant prevention of the generation of reactive oxygen species induced by H2O2/Fe(2+) ACTH/cAMP-dependent activation of redox-imbalanced related factors such as NRF2 or NFκB and the participation of MAPKs in this mechanism was, however, discarded based on results with specific inhibitors and reporter plasmids. We suggest the involvement of CREB in HO-1 induction by ACTH/cAMP, as transfection of cells with a dominant-negative isoform of CREB (DN-CREB-M1) decreased, while overexpression of CREB increased HO-1 protein levels. Sequence screening of the murine HO-1 promoter revealed CRE-like sites located at -146 and -37 of the transcription start site and ChIP studies indicated that this region recruits phosphorylated CREB (pCREB) upon cAMP stimulation in Y1 cells. In agreement, H89 (PKA inhibitor) or cotransfection with DN-CREB-M1 prevented the 8Br-cAMP-dependent increase in luciferase activity in cells transfected with pHO-1[-295/+74].LUC. ACTH and cAMP treatment induced the activation of the PI3K/Akt signaling pathway in a PKA-independent mechanism. Inhibition of this pathway prevented the cAMP-dependent increase in HO-1 protein levels and luciferase activity in cells transfected with pHO-1[-295/+74].LUC. Finally, here we show a crosstalk between the cAMP/PKA and PI3K pathways that affects the binding of p-CREB to its cognate element in the murine promoter of the Hmox1 gene.
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Affiliation(s)
- F Astort
- Departamento de Bioquímica HumanaFacultad de Medicina, Universidad de Buenos Aires, CEFYBO-CONICET, Buenos Aires, Argentina
| | - E M Repetto
- Departamento de Bioquímica HumanaFacultad de Medicina, Universidad de Buenos Aires, CEFYBO-CONICET, Buenos Aires, Argentina
| | - L Rocha-Viegas
- Departamento de Química BiológicaFacultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, IFIBYNE-CONICET, Buenos Aires, Argentina
| | - M E Mercau
- Departamento de Bioquímica HumanaFacultad de Medicina, Universidad de Buenos Aires, CEFYBO-CONICET, Buenos Aires, Argentina
| | - S Sanchez Puch
- Departamento de Bioquímica HumanaFacultad de Medicina, Universidad de Buenos Aires, CEFYBO-CONICET, Buenos Aires, Argentina
| | - C V Finkielstein
- Integrated Cellular Responses LaboratoryDepartment of Biological Sciences, Polytechnic Institute and State University, Blacksburg, Virginia, USA
| | - A Pecci
- Departamento de Química BiológicaFacultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, IFIBYNE-CONICET, Buenos Aires, Argentina
| | - C B Cymeryng
- Departamento de Bioquímica HumanaFacultad de Medicina, Universidad de Buenos Aires, CEFYBO-CONICET, Buenos Aires, Argentina
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Manna PR, Stetson CL, Daugherty C, Shimizu I, Syapin PJ, Garrel G, Cohen-Tannoudji J, Huhtaniemi I, Slominski AT, Pruitt K, Stocco DM. Up-regulation of steroid biosynthesis by retinoid signaling: Implications for aging. Mech Ageing Dev 2015; 150:74-82. [PMID: 26303142 DOI: 10.1016/j.mad.2015.08.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 07/14/2015] [Accepted: 08/15/2015] [Indexed: 11/24/2022]
Abstract
Retinoids (vitamin A and its derivatives) are critical for a spectrum of developmental and physiological processes, in which steroid hormones also play indispensable roles. The StAR protein predominantly regulates steroid biosynthesis in steroidogenic tissues. We have reported that regulation of retinoid, especially atRA and 9-cis RA, responsive StAR transcription is largely mediated by an LXR-RXR/RAR heterodimeric motif in the mouse StAR promoter. Herein we demonstrate that retinoids are capable of enhancing StAR protein, P-StAR, and steroid production in granulosa, adrenocortical, glial, and epidermal cells. Whereas transient expression of RARα and RXRα enhanced 9-cis RA induced StAR gene transcription, silencing of RXRα with siRNA, decreased StAR and steroid levels. An oligonucleotide probe encompassing an LXR-RXR/RAR motif bound to adrenocortical and epidermal keratinocyte nuclear proteins in EMSAs. ChIP studies revealed association of RARα and RXRα with the StAR proximal promoter. Further studies demonstrated that StAR mRNA levels decreased in diseased and elderly men and women skin tissues and that atRA could restore steroidogenesis in epidermal keratinocytes of aged individuals. These findings provide novel insights into the relevance of retinoid signaling in the up-regulation of steroid biosynthesis in various target tissues, and indicate that retinoid therapy may have important implications in age-related complications and diseases.
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Maitra S, Das D, Ghosh P, Hajra S, Roy SS, Bhattacharya S. High cAMP attenuation of insulin-stimulated meiotic G2-M1 transition in zebrafish oocytes: interaction between the cAMP-dependent protein kinase (PKA) and the MAPK3/1 pathways. Mol Cell Endocrinol 2014; 393:109-19. [PMID: 24956082 DOI: 10.1016/j.mce.2014.06.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2013] [Revised: 06/08/2014] [Accepted: 06/10/2014] [Indexed: 02/07/2023]
Abstract
High intra-cellular cyclic nucleotide (cAMP) ensures prophase-I arrest and prevent steroid-induced meiotic G2-M1 transition in full-grown oocytes; however, relatively less information is available for cAMP regulation of growth factor-stimulated signalling events in the oocyte model. Here using zebrafish oocytes, we show that priming with dibutyryl cAMP (dbcAMP) or cAMP modulators, e.g. adenylate cyclase activator, forskolin or phosphodiesterase inhibitors (IBMX/cilostamide) block insulin action on germinal vesicle breakdown (GVBD) and histone H1 kinase activation. Though high cAMP priming attenuates insulin-induced MAPK3/1 (ERK1/2) phosphorylation (activation), following 2h of insulin stimulation it fails to block MAPK activation and GVBD. Further, insulin stimulation promotes down regulation of phospho-PKAc (inactivation) and PKA inhibition by H89/PKI-(6-22)-amide overcomes negative regulation by cAMP and induces GVBD and MAPK activation. Moreover, MEK1/2 inhibitor U0126 has no influence on H89-induced GVBD; however, it delays GVBD response in insulin-stimulated oocytes. MAPK activation by okadaic acid (OA) promotes GVBD; however, high dbcAMP abrogates OA action suggesting cross-talk between cAMP/PKA and MAPK-mediated signalling pathways may contribute significantly in maturing zebrafish oocyte.
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Affiliation(s)
- Sudipta Maitra
- Department of Zoology, Visva-Bharati, Santiniketan 731235, India.
| | - Debabrata Das
- Department of Zoology, Visva-Bharati, Santiniketan 731235, India
| | - Pritha Ghosh
- Department of Zoology, Visva-Bharati, Santiniketan 731235, India
| | - Sudip Hajra
- Department of Zoology, Visva-Bharati, Santiniketan 731235, India
| | - Sib Sankar Roy
- CSIR-Indian Institute of Chemical Biology, 4, Raja S.C. Mullick Road, Kolkata 700032, India
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Slominski A, Zbytek B, Nikolakis G, Manna PR, Skobowiat C, Zmijewski M, Li W, Janjetovic Z, Postlethwaite A, Zouboulis CC, Tuckey RC. Steroidogenesis in the skin: implications for local immune functions. J Steroid Biochem Mol Biol 2013; 137:107-23. [PMID: 23435015 PMCID: PMC3674137 DOI: 10.1016/j.jsbmb.2013.02.006] [Citation(s) in RCA: 249] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Revised: 01/07/2013] [Accepted: 02/08/2013] [Indexed: 12/13/2022]
Abstract
The skin has developed a hierarchy of systems that encompasses the skin immune and local steroidogenic activities in order to protect the body against the external environment and biological factors and to maintain local homeostasis. Most recently it has been established that skin cells contain the entire biochemical apparatus necessary for production of glucocorticoids, androgens and estrogens either from precursors of systemic origin or, alternatively, through the conversion of cholesterol to pregnenolone and its subsequent transformation to biologically active steroids. Examples of these products are corticosterone, cortisol, testosterone, dihydrotesterone and estradiol. Their local production can be regulated by locally produced corticotropin releasing hormone (CRH), adrenocorticotropic hormone (ACTH) or cytokines. Furthermore the production of glucocorticoids is affected by ultraviolet B radiation. The level of production and nature of the final steroid products are dependent on the cell type or cutaneous compartment, e.g., epidermis, dermis, adnexal structures or adipose tissue. Locally produced glucocorticoids, androgens and estrogens affect functions of the epidermis and adnexal structures as well as local immune activity. Malfunction of these steroidogenic activities can lead to inflammatory disorders or autoimmune diseases. The cutaneous steroidogenic system can also have systemic effects, which are emphasized by significant skin contribution to circulating androgens and/or estrogens. Furthermore, local activity of CYP11A1 can produce novel 7Δ-steroids and secosteroids that are biologically active. Therefore, modulation of local steroidogenic activity may serve as a new therapeutic approach for treatment of inflammatory disorders, autoimmune processes or other skin disorders. In conclusion, the skin can be defined as an independent steroidogenic organ, whose activity can affect its functions and the development of local or systemic inflammatory or autoimmune diseases. This article is part of a Special Issue entitled 'CSR 2013'.
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Affiliation(s)
- Andrzej Slominski
- Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA; Center for Cancer Research, University of Tennessee Health Science Center, Memphis, TN 38163, USA; Department of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
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Piri M, Rostampour M, Nasehi M, Zarrindast MR. Blockade of the dorsal hippocampal dopamine D1 receptors inhibits the scopolamine-induced state-dependent learning in rats. Neuroscience 2013; 252:460-7. [PMID: 23933216 DOI: 10.1016/j.neuroscience.2013.08.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2013] [Revised: 07/27/2013] [Accepted: 08/01/2013] [Indexed: 02/06/2023]
Abstract
In the present study, we investigated the possible role of the dorsal hippocampal (CA1) dopamine D1 receptors on scopolamine-induced amnesia as well as scopolamine state-dependent memory in adult male Wistar rats. Animals were bilaterally implanted with chronic cannulae in the CA1 regions of the dorsal hippocampus, trained in a step-through type inhibitory avoidance task, and tested 24h after training for their step-through latency. Results indicated that pre-training or pre-test intra-CA1 administration of scopolamine (1.5 and 3 μg/rat) dose-dependently reduced the step-through latency, showing an amnestic response. The pre-training scopolamine-induced amnesia (3 μg/rat) was reversed by the pre-test administration of scopolamine, indicating a state-dependent effect. Similarly, the pre-test administration of dopamine D1 receptor agonist, 1-phenyl-7,8-dihydroxy-2,3,4,5-tetrahydro-1H-3-benzazepine hydrochloride (SKF38393; 1, 2 and 4 μg/rat, intra-CA1), could significantly reverse the scopolamine-induced amnesia. Interestingly, administration of an ineffective dose of scopolamine (0.25 μg/rat, intra-CA1) before different doses of SKF38393, blocked the reversal effect of SKF38393 on the pre-training scopolamine-induced amnesia. Moreover, while the pre-test intra-CA1 injection of the dopamine D1 receptor antagonist, R(+)-7-chloro-8-hydroxy-3-methyl-1-phenyl-2,3,4,5-tetrahydro-1H-3-benzazepine hydrochloride (SCH23390; 0.1 and 0.5 μg/rat, intra-CA1), resulted in apparent memory impairment, microinjection of the same doses of this agent inhibited the scopolamine-induced state-dependent memory. These results indicate that the CA1 dopamine D1 receptors may potentially play an important role in scopolamine-induced amnesia as well as the scopolamine state-dependent memory. Furthermore, our results propose that dopamine D1 receptor agonist, SKF38393 reverses the scopolamine-induced amnesia via acetylcholine release and possibly through the activation of muscarinic receptors.
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Gu SQ, Liang YY, Fan LR, Li BY, Wang DS. Co-regulative effects of the cAMP/PKA and DAG/PKC signal pathways on human gastric cancer cells during differentiation induced by traditional Chinese medicines. World J Gastroenterol 1997; 3:50-3. [PMID: 27006587 PMCID: PMC4796840 DOI: 10.3748/wjg.v3.i1.50] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/1996] [Revised: 11/05/1996] [Accepted: 12/14/1996] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the role of cAMP/PKA and DAG/PKC pathways of MGc80-3 cells treated with a traditional Chinese medicine compound, bailong preparation (bailong).
METHODS: cAMP level, DAG content and activities of PKA and PKC were measured in different groups: control; 1.8 g/L bailong; 1.8 g/L bailong + 20 mg/L PKA inhibitor; and 5 μmol/L PKC inhibitor.
RESULTS: When MGc80-3 cells were treated with bailong for 3 h, cAMP level and PKA activity were 113% and 19.7% higher than those of the control, while DAG content and PKC activity were 47.0% and 64.2% lower than those of the control. When the PKC pathway was blocked by PKC inhibitor GF-109203 X, cAMP level and PKA activity were increased by 78.8% and 33.5% compared to inhibitor GF-109203 X, and cAMP level and PKA activity were increased by 78.8% and 33.5% compared to the control, while the DAG content and PKC activity were decreased by 40.3% and 56.3%. When MGc80-3 cells were treated with bailong and PKA inhibitor blocked PKA pathways at the same time, cAMP level and PKA activity were decreased by 46.0% and 28.9%. On the other hand, DAG content and PKC activity were increased by 50.7% and 51.6% compared to the bailong group.
CONCLUSION: There is a relationship of cause and effect between differentiation of MGc80-3 cells and the signal pathways. The results of this study are similar to that of hexamethylenebisacetamide (HMBA), suggesting that the two signal systems are the foundation of proliferative regulation of MGc80-3 cells treated with Chinese medicine bailong or HMBA.
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