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Zhu Y, Li Y, Cao Z, Xue J, Wang X, Hu T, Han B, Guo Y. Mechanically strained osteocyte-derived exosomes contained miR-3110-5p and miR-3058-3p and promoted osteoblastic differentiation. Biomed Eng Online 2024; 23:44. [PMID: 38705993 PMCID: PMC11070085 DOI: 10.1186/s12938-024-01237-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 04/11/2024] [Indexed: 05/07/2024] Open
Abstract
BACKGROUND Osteocytes are critical mechanosensory cells in bone, and mechanically stimulated osteocytes produce exosomes that can induce osteogenesis. MicroRNAs (miRNAs) are important constituents of exosomes, and some miRNAs in osteocytes regulate osteogenic differentiation; previous studies have indicated that some differentially expressed miRNAs in mechanically strained osteocytes likely influence osteoblastic differentiation. Therefore, screening and selection of miRNAs that regulate osteogenic differentiation in exosomes of mechanically stimulated osteocytes are important. RESULTS A mechanical tensile strain of 2500 με at 0.5 Hz 1 h per day for 3 days, elevated prostaglandin E2 (PGE2) and insulin-like growth factor-1 (IGF-1) levels and nitric oxide synthase (NOS) activity of MLO-Y4 osteocytes, and promoted osteogenic differentiation of MC3T3-E1 osteoblasts. Fourteen miRNAs differentially expressed only in MLO-Y4 osteocytes which were stimulated with mechanical tensile strain, were screened, and the miRNAs related to osteogenesis were identified. Four differentially expressed miRNAs (miR-1930-3p, miR-3110-5p, miR-3090-3p, and miR-3058-3p) were found only in mechanically strained osteocytes, and the four miRNAs, eight targeted mRNAs which were differentially expressed only in mechanically strained osteoblasts, were also identified. In addition, the mechanically strained osteocyte-derived exosomes promoted the osteoblastic differentiation of MC3T3-E1 cells in vitro, the exosomes were internalized by osteoblasts, and the up-regulated miR-3110-5p and miR-3058-3p in mechanically strained osteocytes, were both increased in the exosomes, which was verified via reverse transcription quantitative polymerase chain reaction (RT-qPCR). CONCLUSIONS In osteocytes, a mechanical tensile strain of 2500 με at 0.5 Hz induced the fourteen differentially expressed miRNAs which probably were in exosomes of osteocytes and involved in osteogenesis. The mechanically strained osteocyte-derived exosomes which contained increased miR-3110-5p and miR-3058-3p (two of the 14 miRNAs), promoted osteoblastic differentiation.
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Affiliation(s)
- Yingwen Zhu
- Department of Biomedical Engineering, School of Intelligent Medicine and Biotechnology, Guilin Medical University, No. 1 Zhiyuan Road, Lingui District, Guilin, 541199, Guangxi, People's Republic of China
- Education Department of Guangxi Zhuang Autonomous Region, Key Laboratory of Biochemistry and Molecular Biology (Guilin Medical University), No. 1 Zhiyuan Road, Lingui District, Guilin, 541199, Guangxi, People's Republic of China
| | - Yanan Li
- Department of Biomedical Engineering, School of Intelligent Medicine and Biotechnology, Guilin Medical University, No. 1 Zhiyuan Road, Lingui District, Guilin, 541199, Guangxi, People's Republic of China
| | - Zhen Cao
- Department of Biomedical Engineering, School of Intelligent Medicine and Biotechnology, Guilin Medical University, No. 1 Zhiyuan Road, Lingui District, Guilin, 541199, Guangxi, People's Republic of China
- Education Department of Guangxi Zhuang Autonomous Region, Key Laboratory of Biochemistry and Molecular Biology (Guilin Medical University), No. 1 Zhiyuan Road, Lingui District, Guilin, 541199, Guangxi, People's Republic of China
| | - Jindong Xue
- Department of Biomedical Engineering, School of Intelligent Medicine and Biotechnology, Guilin Medical University, No. 1 Zhiyuan Road, Lingui District, Guilin, 541199, Guangxi, People's Republic of China
- Education Department of Guangxi Zhuang Autonomous Region, Key Laboratory of Biochemistry and Molecular Biology (Guilin Medical University), No. 1 Zhiyuan Road, Lingui District, Guilin, 541199, Guangxi, People's Republic of China
| | - Xiaoyan Wang
- Department of Biomedical Engineering, School of Intelligent Medicine and Biotechnology, Guilin Medical University, No. 1 Zhiyuan Road, Lingui District, Guilin, 541199, Guangxi, People's Republic of China
| | - Tingting Hu
- Department of Biomedical Engineering, School of Intelligent Medicine and Biotechnology, Guilin Medical University, No. 1 Zhiyuan Road, Lingui District, Guilin, 541199, Guangxi, People's Republic of China
| | - Biao Han
- Department of Biomedical Engineering, School of Intelligent Medicine and Biotechnology, Guilin Medical University, No. 1 Zhiyuan Road, Lingui District, Guilin, 541199, Guangxi, People's Republic of China.
- Education Department of Guangxi Zhuang Autonomous Region, Key Laboratory of Biochemistry and Molecular Biology (Guilin Medical University), No. 1 Zhiyuan Road, Lingui District, Guilin, 541199, Guangxi, People's Republic of China.
| | - Yong Guo
- Department of Biomedical Engineering, School of Intelligent Medicine and Biotechnology, Guilin Medical University, No. 1 Zhiyuan Road, Lingui District, Guilin, 541199, Guangxi, People's Republic of China.
- Education Department of Guangxi Zhuang Autonomous Region, Key Laboratory of Biochemistry and Molecular Biology (Guilin Medical University), No. 1 Zhiyuan Road, Lingui District, Guilin, 541199, Guangxi, People's Republic of China.
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El-Malah AA, Gineinah MM, Khayat MT, Aljahdali AS, Safar MM, Almazmumi HA, Khinkar RM. Design, synthesis, molecular docking, and molecular dynamic studies of novel quinazoline derivatives as phosphodiesterase 7 inhibitors. Front Pharmacol 2024; 15:1389076. [PMID: 38711988 PMCID: PMC11070508 DOI: 10.3389/fphar.2024.1389076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 04/05/2024] [Indexed: 05/08/2024] Open
Abstract
Introduction: Phosphodiesterase 7 (PDE7) is a high-affinity cyclic AMP (cAMP)-specific PDE that is expressed in immune and proinflammatory cells. In this work, we explore the possibility that selective small molecule inhibitors of this enzyme family could provide a novel approach to alleviate the inflammation that is associated with many inflammatory diseases. Methods: A series of novel substituted 4-hydrazinoquinazoline derivatives and fused triazoloquinazolines were designed, synthesized, and evaluated in vitro for their PDE7A inhibition activities, in comparison with Theophylline, a non-selective PDE inhibitor, and BRL50481, a selective PDE7A inhibitor. This series of novel quinazoline derivatives were synthesized via multi-step reactions. The reaction sequence began with selective monohydrazinolysis of compounds 2a,b to give 3a,b. Schiff bases 4a-h were synthesized by the reaction of the quinazolylhydrazines 3a,b with various substituted aromatic aldehydes. The reaction of 4a-h with bromine in acetic acid, in turn, gave fused triazoloquinazolines 5a-h. These compounds were characterized by satisfied spectrum analyses mainly including 1HNMR, 13CNMR, and MS together with elemental analyses. Results and discussion: The results of in vitro PDE7A inhibition activity clearly indicated that compounds 4b, 4g, 5c, and 5f exhibited good potency. Molecular docking and molecular dynamic simulation studies further supported our findings and provided the basis of interaction in terms of conventional hydrogen bonds and π-π stacking patterns. The present results lay the groundwork for developing lead compounds with improved phosphodiesterase seven inhibitory activities.
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Affiliation(s)
- Afaf A. El-Malah
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Magdy M. Gineinah
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Maan T. Khayat
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Anfal S. Aljahdali
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Marwa M. Safar
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Giza, Egypt
- Department of Pharmacology and Biochemistry, Faculty of Pharmacy, The British University in Egypt, Cairo, Egypt
| | - Hadeel A. Almazmumi
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Roaa M. Khinkar
- Department of Pharmacy Practice, College of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
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3
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Yang K, Li J, Tao L. Purine metabolism in the development of osteoporosis. Biomed Pharmacother 2022; 155:113784. [DOI: 10.1016/j.biopha.2022.113784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 11/17/2022] Open
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Zhang D, Wei B, Li L, Jiang T, Yao X, Liu X, Sun Y. Role of LncRNA score and PVT1 in primary hyperparathyroidism-- a preliminary study. J Otolaryngol Head Neck Surg 2021; 50:30. [PMID: 33910638 PMCID: PMC8082613 DOI: 10.1186/s40463-021-00509-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 03/08/2021] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Dysregulated lncRNA score and PVT1 expression may be involved in cancer. However, relationships of lncRNAs with hyperparathyroidism and parathyroid cancer (PC) diagnosis remain mysterious. METHODS Using quantitative real-time polymerase chain reaction (RT-qPCR), expression profile of PVT1 was evaluated in 57 patients with primary hyperparathyroidism, including 11 with parathyroid cancer (PC) and 46 with parathyroid adenoma (PA). RESULTS Higher levels of lncRNA score and PVT1 expression were associated with increased serum calcium level after water ingestion and PC risk (P < 0.05). Accordingly, lncRNA score and PVT1 expression were increased with varying degrees of hypercalcemia in PC. A higher level of lncRNA score (but not PVT1) was an independent risk factor of PC, with an AUC up to 0.872 (95% CI: 0.756-0.945, P < 0.001). Moreover, lncRNA score was more valuable (with AUC 0.974, sensitivity of 85.71% and specificity of 100%, respectively) than intact parathyroid hormone (iPTH) in predicting risk of PC among patients with hypercalcemia (especially based on greater AUC, P = 0.010). CONCLUSION Increased lncRNA score is correlated with an elevated level of serum calcium, which may serve as a potential biomarker for PC diagnosis, especially with hypercalcemia.
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Affiliation(s)
- Dongxue Zhang
- Department of Endocrinology, Beijing Shijitan Hospital, Capital Medical University, No.10 Tieyi Road, Haidian District, Beijing, 100038, China
| | - Bojun Wei
- Department of Thyroid and Neck Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China
- Department of Otorhinolaryngology, Beijing Shijitan Hospital, Capital Medical University, Beijing, 100038, China
| | - Long Li
- Department of Pediatric Surgery, Capital Institute of Pediatrics, Beijing, 100020, China
| | - Tao Jiang
- Department of Endocrinology, Beijing Shijitan Hospital, Capital Medical University, No.10 Tieyi Road, Haidian District, Beijing, 100038, China.
| | - Xiaoai Yao
- Department of Endocrinology, Beijing Shijitan Hospital, Capital Medical University, No.10 Tieyi Road, Haidian District, Beijing, 100038, China
| | - Xin Liu
- Department of Medical Genetics and Developmental Biology, Capital Medical University, Beijing, 100069, China
| | - Yuyan Sun
- Department of Endocrinology, Beijing Shijitan Hospital, Capital Medical University, No.10 Tieyi Road, Haidian District, Beijing, 100038, China
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Porwal K, Pal S, Bhagwati S, Siddiqi MI, Chattopadhyay N. Therapeutic potential of phosphodiesterase inhibitors in the treatment of osteoporosis: Scopes for therapeutic repurposing and discovery of new oral osteoanabolic drugs. Eur J Pharmacol 2021; 899:174015. [PMID: 33711307 DOI: 10.1016/j.ejphar.2021.174015] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 02/19/2021] [Accepted: 03/03/2021] [Indexed: 01/05/2023]
Abstract
Cyclic nucleotide phosphodiesterases (PDEs) are ubiquitously expressed enzymes that hydrolyze phosphodiester bond in the second messenger molecules including cAMP and cGMP. A wide range of drugs blocks one or more PDEs thereby preventing the inactivation of cAMP/cGMP. PDEs are differentially expressed in bone cells including osteoblasts, osteoclasts and chondrocytes. Intracellular increases in cAMP/cGMP levels in osteoblasts result in osteogenic response. Acting via the type 1 PTH receptor, teriparatide and abaloparatide increase intracellular cAMP and induce osteoanabolic effect, and many PDE inhibitors mimic this effect in preclinical studies. Since all osteoanabolic drugs are injectable and that oral drugs are considered to improve the treatment adherence and persistence, osteogenic PDE inhibitors could be a promising alternative to the currently available osteogenic therapies and directly assessed clinically in drug repurposing mode. Similar to teriparatide/abaloparatide, PDE inhibitors while stimulating osteoblast function also promote osteoclast function through stimulation of receptor activator of nuclear factor kappa-B ligand production from osteoblasts. In this review, we critically discussed the effects of PDE inhibitors in bone cells from cellular signalling to a variety of preclinical models that evaluated the bone formation mechanisms. We identified pentoxifylline (a non-selective PDE inhibitor) and rolipram (a PDE4 selective inhibitor) being the most studied inhibitors with osteogenic effect in preclinical models of bone loss at ≤ human equivalent doses, which suggest their potential for post-menopausal osteoporosis treatment through therapeutic repurposing. Subsequently, we treated pentoxifylline and rolipram as prototypical osteogenic PDEs to predict new chemotypes via the computer-aided design strategies for new drugs, based on the structural biology of PDEs.
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Affiliation(s)
- Konica Porwal
- Division of Endocrinology and Centre for Research in Anabolic Skeletal Targets in Health and Illness (ASTHI), India
| | - Subhashis Pal
- Division of Endocrinology and Centre for Research in Anabolic Skeletal Targets in Health and Illness (ASTHI), India
| | - Sudha Bhagwati
- Division of Molecular and Structural Biology, CSIR-Central Drug Research Institute, Sector 10/1 Jankipuram Extension, Sitapur Road, Lucknow, 226 031, India
| | - Mohd Imran Siddiqi
- Division of Molecular and Structural Biology, CSIR-Central Drug Research Institute, Sector 10/1 Jankipuram Extension, Sitapur Road, Lucknow, 226 031, India
| | - Naibedya Chattopadhyay
- Division of Endocrinology and Centre for Research in Anabolic Skeletal Targets in Health and Illness (ASTHI), India.
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Bagherzadeh M, Sajjadi-Jazi SM, Sharifi F, Ebrahimpur M, Amininezhad F, Ostovar A, Shafiee G, Heshmat R, Mehrdad N, Razi F, Nabipour I, Larijani B. Effects of metabolic syndrome on bone health in older adults: the Bushehr Elderly Health (BEH) program. Osteoporos Int 2020; 31:1975-1984. [PMID: 32440891 DOI: 10.1007/s00198-020-05455-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 05/05/2020] [Indexed: 12/24/2022]
Abstract
UNLABELLED Based on the clinical, BMD, and TBS data of 2380 participants aged ≥ 60 which was gathered during the BEH program, stage II, we showed that MetS was positively associated with BMD, while a negative or no association was observed between MetS and TBS depending on the sex and the adjustment model. INTRODUCTION The results of previous reports in regard to the effect of metabolic syndrome (MetS) on bone health are not conclusive. This study aimed to evaluate the association between MetS with bone mineral density (BMD) and trabecular bone score (TBS) as an indicator of bone quantity and quality, respectively. METHODS Using a cross-sectional design, this study was carried out based on the data collected during the BEH Program, stage II. MetS was defined according to NCEP-ATP III criteria. BMD (at the lumbar spine and the hip) and lumbar spine TBS were assessed by dual-energy X-ray absorptiometry device. RESULTS The data of 2380 participants (women = 1228, men = 1152) aged ≥ 60 were analyzed. In the fully adjusted regression models (including BMI), significant associations between MetS and mean BMD were observed across all locations in men (P values ≤ 0.001) and in the lumbar spine in women (P value = 0.003). In addition, the prevalence of osteoporosis (based on BMD) was significantly lower in those with MetS than those without MetS in both sexes, even after full adjustments (women, OR = 0.707, P value = 0.013; men, OR = 0.563, P value = 0.001). In contrast, in age-adjusted regression analyses, the prevalence of degraded bone microarchitecture (TBS ≤ 1.2) was significantly increased in those with MetS than those without, irrespective of the participants' sex (P values < 0.05). The mean TBS was also negatively associated with MetS in women (β = - 0.075, P value = 0.007) but not in men (β = - 0.052, P value = 0.077), in age-adjusted regression models. However, after including BMI in the adjusted models, all significant associations between TBS values and MetS disappeared. CONCLUSION It seems that a positive association exists between MetS and BMD, while MetS is either not associated or negatively correlated with bone quality as measured by TBS.
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Affiliation(s)
- M Bagherzadeh
- Clinical Research Development Center, Shahid Beheshti Hospital, Qom University of Medical Sciences, Qom, Iran
| | - S M Sajjadi-Jazi
- Cell therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
- Endocrinology and Metabolism Research center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - F Sharifi
- Elderly Health Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - M Ebrahimpur
- Endocrinology and Metabolism Research center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - F Amininezhad
- Endocrinology and Metabolism Research center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - A Ostovar
- Osteoporosis Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - G Shafiee
- Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - R Heshmat
- Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - N Mehrdad
- Elderly Health Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - F Razi
- Diabetes Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - I Nabipour
- The Persian Gulf Marine Biotechnology Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
| | - B Larijani
- Endocrinology and Metabolism Research center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran.
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Chen Y, Li S, Zhong X, Kang Z, Chen R. PDE-7 Inhibitor BRL-50481 Reduces Neurodegeneration and Long-Term Memory Deficits in Mice Following Sevoflurane Exposure. ACS Chem Neurosci 2020; 11:1353-1358. [PMID: 32271540 DOI: 10.1021/acschemneuro.0c00106] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Sevoflurane, one of the most commonly used anesthetic agents, has been demonstrated to induce widespread neurodegeneration in the developing brain. We aimed to evaluate the protective effects of a PDE-7 inhibitor (BRL-50481) against the neurotoxic effects of sevoflurane on the developing nervous system. Spatial learning and memory in sevoflurane-treated mice were examined using the Morris water maze test, and neuroprotective effects of PDE-7 inhibitor (BRL-50481) against sevoflurane-induced impairments were evaluated. Our results showed that sevoflurane treatment markedly induced neurodegeneration and impaired long-term memory in neonatal mice. Notably, BRL-50481 coadministration could significantly attenuate sevoflurane-induced learning and memory defects, prevent deterioration of recognition memory, and protect against neuron apoptosis. Mechanistically, BRL-50481 administration suppressed sevoflurane-induced neurodegenerative disorders through restoring cAMP and activating cAMP/CREB signaling in the hippocampus. PDE7 inhibitor may be a potential therapeutic agent for sevoflurane-induced neurodegeneration and long-term memory deficits.
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Affiliation(s)
- Yingle Chen
- Department of Anesthesiology, Quanzhou First Hospital Affiliated to Fujian Medical University, Quanzhou 362000, Fujian, China
| | - Shunyuan Li
- Department of Anesthesiology, Quanzhou First Hospital Affiliated to Fujian Medical University, Quanzhou 362000, Fujian, China
| | - Xianmei Zhong
- Department of Anesthesiology, Quanzhou First Hospital Affiliated to Fujian Medical University, Quanzhou 362000, Fujian, China
| | - Zhenming Kang
- Department of Anesthesiology, Quanzhou First Hospital Affiliated to Fujian Medical University, Quanzhou 362000, Fujian, China
| | - Rulei Chen
- Department of Anesthesiology, Quanzhou First Hospital Affiliated to Fujian Medical University, Quanzhou 362000, Fujian, China
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Elfeky SM, Sobahi TR, Gineinah MM, Ahmed NS. Synthesis, biological screening, and molecular docking of quinazolinone and quinazolinethione as phosphodiesterase 7 inhibitors. Arch Pharm (Weinheim) 2019; 353:e1900211. [DOI: 10.1002/ardp.201900211] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 10/08/2019] [Accepted: 10/16/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Sherin M. Elfeky
- Department of Pharmaceutical Organic Chemistry, Faculty of PharmacyMansoura University Mansoura Egypt
| | - Tariq R. Sobahi
- Department of Chemistry, Faculty of ScienceKing Abdul‐Aziz University Jeddah Saudi Arabia
| | - Magdy M. Gineinah
- Department of Pharmaceutical Organic Chemistry, Faculty of PharmacyMansoura University Mansoura Egypt
- Department of Pharmaceutical Chemistry, Faculty of PharmacyKing Abdul‐Aziz University Jeddah Saudi Arabia
| | - Nesreen S. Ahmed
- Department of Therapeutic Chemistry, Pharmaceutical, and Drug Industries Research DivisionNational Research Center Dokki Cairo Egypt
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Brescia M, Zaccolo M. Modulation of Compartmentalised Cyclic Nucleotide Signalling via Local Inhibition of Phosphodiesterase Activity. Int J Mol Sci 2016; 17:E1672. [PMID: 27706091 PMCID: PMC5085705 DOI: 10.3390/ijms17101672] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 09/20/2016] [Accepted: 09/23/2016] [Indexed: 12/20/2022] Open
Abstract
Cyclic nucleotide phosphodiesterases (PDEs) are the only enzymes that degrade the cyclic nucleotides cAMP and cGMP, and play a key role in modulating the amplitude and duration of the signal delivered by these two key intracellular second messengers. Defects in cyclic nucleotide signalling are known to be involved in several pathologies. As a consequence, PDEs have long been recognized as potential drug targets, and they have been the focus of intense research for the development of therapeutic agents. A number of PDE inhibitors are currently available for the treatment of disease, including obstructive pulmonary disease, erectile dysfunction, and heart failure. However, the performance of these drugs is not always satisfactory, due to a lack of PDE-isoform specificity and their consequent adverse side effects. Recent advances in our understanding of compartmentalised cyclic nucleotide signalling and the role of PDEs in local regulation of cAMP and cGMP signals offers the opportunity for the development of novel strategies for therapeutic intervention that may overcome the current limitation of conventional PDE inhibitors.
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Affiliation(s)
- Marcella Brescia
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX1 3TP, UK.
| | - Manuela Zaccolo
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX1 3TP, UK.
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10
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Cichero E, Brullo C, Bruno O, Fossa P. Exhaustive 3D-QSAR analyses as a computational tool to explore the potency and selectivity profiles of thieno[3,2-d]pyrimidin-4(3H)-one derivatives as PDE7 inhibitors. RSC Adv 2016. [DOI: 10.1039/c6ra12624c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
In the development of selective ligands binding to specific PDE isoforms, the ligand-based approach proved to be a useful tool to better investigate the potency and selectivity profiles of PDE7 inhibitors.
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Affiliation(s)
- Elena Cichero
- Department of Pharmacy
- Section of Medicinal Chemistry
- School of Medical and Pharmaceutical Sciences
- University of Genoa
- Genoa
| | - Chiara Brullo
- Department of Pharmacy
- Section of Medicinal Chemistry
- School of Medical and Pharmaceutical Sciences
- University of Genoa
- Genoa
| | - Olga Bruno
- Department of Pharmacy
- Section of Medicinal Chemistry
- School of Medical and Pharmaceutical Sciences
- University of Genoa
- Genoa
| | - Paola Fossa
- Department of Pharmacy
- Section of Medicinal Chemistry
- School of Medical and Pharmaceutical Sciences
- University of Genoa
- Genoa
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11
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Strahm E, Rane A, Ekström L. PDE7B is involved in nandrolone decanoate hydrolysis in liver cytosol and its transcription is up-regulated by androgens in HepG2. Front Pharmacol 2014; 5:132. [PMID: 24910615 PMCID: PMC4038775 DOI: 10.3389/fphar.2014.00132] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 05/14/2014] [Indexed: 11/29/2022] Open
Abstract
Most androgenic drugs are available as esters for a prolonged depot action. However, the enzymes involved in the hydrolysis of the esters have not been identified. There is one study indicating that PDE7B may be involved in the activation of testosterone enanthate. The aims are to identify the cellular compartments where the hydrolysis of testosterone enanthate and nandrolone decanoate occurs, and to investigate the involvement of PDE7B in the activation. We also determined if testosterone and nandrolone affect the expression of the PDE7B gene. The hydrolysis studies were performed in isolated human liver cytosolic and microsomal preparations with and without specific PDE7B inhibitor. The gene expression was studied in human hepatoma cells (HepG2) exposed to testosterone and nandrolone. We show that PDE7B serves as a catalyst of the hydrolysis of testosterone enanthate and nandrolone decanoate in liver cytosol. The gene expression of PDE7B was significantly induced 3- and 5- fold after 2 h exposure to 1 μM testosterone enanthate and nandrolone decanoate, respectively. These results show that PDE7B is involved in the activation of esterified nandrolone and testosterone and that the gene expression of PDE7B is induced by supra-physiological concentrations of androgenic drugs.
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Affiliation(s)
- Emmanuel Strahm
- Division of Clinical Pharmaclogy, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Stockholm, Sweden
| | - Anders Rane
- Division of Clinical Pharmaclogy, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Stockholm, Sweden
| | - Lena Ekström
- Division of Clinical Pharmaclogy, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Stockholm, Sweden
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12
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Fang C, Dong HJ, Zou ZJ, Fan L, Wang L, Zhang R, Xu J, Xu W, Li JY. High expression of cyclic nucleotide phosphodiesterase 7B mRNA predicts poor prognosis in mantle cell lymphoma. Leuk Res 2013; 37:536-40. [DOI: 10.1016/j.leukres.2013.02.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 01/30/2013] [Accepted: 02/05/2013] [Indexed: 12/20/2022]
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13
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Mujoo K, Krumenacker JS, Murad F. Nitric oxide-cyclic GMP signaling in stem cell differentiation. Free Radic Biol Med 2011; 51:2150-7. [PMID: 22019632 PMCID: PMC3232180 DOI: 10.1016/j.freeradbiomed.2011.09.037] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Revised: 09/27/2011] [Accepted: 09/29/2011] [Indexed: 12/15/2022]
Abstract
The nitric oxide-cyclic GMP (NO-cGMP) pathway mediates important physiological functions associated with various integrative body systems including the cardiovascular and nervous systems. Furthermore, NO regulates cell growth, survival, apoptosis, proliferation, and differentiation at the cellular level. To understand the significance of the NO-cGMP pathway in development and differentiation, studies have been conducted both in developing embryos and in stem cells. Manipulation of the NO-cGMP pathway, by employing activators and inhibitors as pharmacological probes, and genetic manipulation of NO signaling components have implicated the involvement of this pathway in the regulation of stem cell differentiation. This review focuses on some of the work pertaining to the role of NO-cGMP in the differentiation of stem cells into cells of various lineages, particularly into myocardial cells, and in stem cell-based therapy.
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Affiliation(s)
- Kalpana Mujoo
- Brown Foundation Institute of Molecular Medicine, Texas Therapeutics Institute, University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
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Jekabsons K, Riekstina U, Parfejevs V, Laizane A, Pavasare M, Lencberga N, Jansone B, Muceniece R. Culture-expanded human dermal stem cells exhibit donor to donor differences in cAMP generation. Cell Tissue Res 2011; 345:253-63. [DOI: 10.1007/s00441-011-1203-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Accepted: 05/27/2011] [Indexed: 12/13/2022]
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15
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Zhang R, Edwards JR, Ko SY, Dong S, Liu H, Oyajobi BO, Papasian C, Deng HW, Zhao M. Transcriptional regulation of BMP2 expression by the PTH-CREB signaling pathway in osteoblasts. PLoS One 2011; 6:e20780. [PMID: 21695256 PMCID: PMC3111437 DOI: 10.1371/journal.pone.0020780] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Accepted: 05/09/2011] [Indexed: 11/18/2022] Open
Abstract
Intermittent application of parathyroid hormone (PTH) has well established anabolic effects on bone mass in rodents and humans. Although transcriptional mechanisms responsible for these effects are not fully understood, it is recognized that transcriptional factor cAMP response element binding protein (CREB) mediates PTH signaling in osteoblasts, and that there is a communication between the PTH-CREB pathway and the BMP2 signaling pathway, which is important for osteoblast differentiation and bone formations. These findings, in conjunction with putative cAMP response elements (CREs) in the BMP2 promoter, led us to hypothesize that the PTH-CREB pathway could be a positive regulator of BMP2 transcription in osteoblasts. To test this hypothesis, we first demonstrated that PTH signaling activated CREB by phosphorylation in osteoblasts, and that both PTH and CREB were capable of promoting osteoblastic differentiation of primary mouse osteoblast cells and multiple rodent osteoblast cell lines. Importantly, we found that the PTH-CREB signaling pathway functioned as an effective activator of BMP2 expression, as pharmacologic and genetic modulation of PTH-CREB activity significantly affected BMP2 expression levels in these cells. Lastly, through multiple promoter assays, including promoter reporter deletion, mutation, chromatin immunoprecipitation (ChIP), and electrophoretic mobility shift assay (EMSA), we identified a specific CRE in the BMP2 promoter which is responsible for CREB transactivation of the BMP2 gene in osteoblasts. Together, these results demonstrate that the anabolic function of PTH signaling in bone is mediated, at least in part, by CREB transactivation of BMP2 expression in osteoblasts.
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Affiliation(s)
- Rongrong Zhang
- Department of Biostatistics and Bioinformatics, Tulane University, New Orleans, Louisiana, United States of America
| | - James R. Edwards
- Department of Medicine, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Seon-Yle Ko
- School of Dentistry, Dankook University, Cheonan, Choongnam, Korea
| | - Shanshan Dong
- Department of Biostatistics and Bioinformatics, Tulane University, New Orleans, Louisiana, United States of America
| | - Hongbin Liu
- Department of Biostatistics and Bioinformatics, Tulane University, New Orleans, Louisiana, United States of America
| | - Babatunde O. Oyajobi
- Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, Texas, United States of America
| | - Christopher Papasian
- Department of Basic Medical Sciences, University of Missouri – Kansas City, Kansas City, Missouri, United States of America
| | - Hong-Wen Deng
- Department of Biostatistics and Bioinformatics, Tulane University, New Orleans, Louisiana, United States of America
| | - Ming Zhao
- Department of Biostatistics and Bioinformatics, Tulane University, New Orleans, Louisiana, United States of America
- Department of Cellular and Molecular Biology, Tulane University, New Orleans, Louisiana, United States of America
- * E-mail:
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Jeon KI, Jono H, Miller CL, Cai Y, Lim S, Liu X, Gao P, Abe JI, Li JD, Yan C. Ca2+/calmodulin-stimulated PDE1 regulates the beta-catenin/TCF signaling through PP2A B56 gamma subunit in proliferating vascular smooth muscle cells. FEBS J 2010; 277:5026-39. [PMID: 21078118 PMCID: PMC3059601 DOI: 10.1111/j.1742-4658.2010.07908.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The phenotypic change of vascular smooth muscle cells (VSMCs), from a 'contractile' phenotype to a 'synthetic' phenotype, is crucial for pathogenic vascular remodeling in vascular diseases such as atherosclerosis and restenosis. Ca(2+)/calmodulin-stimulated phosphodiesterase 1 (PDE1) isozymes, including PDE1A and PDE1C, play integral roles in regulating the proliferation of synthetic VSMCs. However, the underlying molecular mechanism(s) remain unknown. In this study, we explore the role and mechanism of PDE1 isoforms in regulating β-catenin/T-cell factor (TCF) signaling in VSMCs, a pathway important for vascular remodeling through promoting VSMC growth and survival. We found that inhibition of PDE1 activity markedly attenuated β-catenin/TCF signaling by downregulating β-catenin protein. The effect of PDE1 inhibition on β-catenin protein reduction is exerted via promoting glycogen synthase kinase 3 (GSK3)β activation, β-catenin phosphorylation and subsequent β-catenin protein degradation. Moreover, PDE1 inhibition specifically upregulated phosphatase protein phosphatase 2A (PP2A) B56γ subunit gene expression, which is responsible for the effects of PDE1 inhibition on GSK3β and β-catenin/TCF signaling. Furthermore, the effect of PDE1 inhibition on β-catenin was specifically mediated by PDE1A but not PDE1C isozyme. Interestingly, in synthetic VSMCs, PP2A B56γ, phospho-GSK3β and phospho-β-catenin were all found in the nucleus, suggesting that PDE1A regulates nuclear β-catenin protein stability through the nuclear PP2A-GSK3β-β-catenin signaling axis. Taken together, these findings provide direct evidence for the first time that PP2A B56γ is a critical mediator for PDE1A in the regulation of β-catenin signaling in proliferating VSMCs.
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Affiliation(s)
- Kye-Im Jeon
- Aab Cardiovascular Research Institute, University of Rochester Medical Center, Rochester, NY 14642
| | - Hirofumi Jono
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY14642
| | - Clint L. Miller
- Aab Cardiovascular Research Institute, University of Rochester Medical Center, Rochester, NY 14642
| | - Yujun Cai
- Aab Cardiovascular Research Institute, University of Rochester Medical Center, Rochester, NY 14642
| | - Soyeon Lim
- Aab Cardiovascular Research Institute, University of Rochester Medical Center, Rochester, NY 14642
| | - Xuan Liu
- Department of Biochemistry, University of California, Riverside, CA 92521
| | - Pingjin Gao
- Ruijin Hospital, Shanghai Institute of Hypertension, Shanghai, China
| | - Jun-Ichi Abe
- Aab Cardiovascular Research Institute, University of Rochester Medical Center, Rochester, NY 14642
| | - Jian-Dong Li
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY14642
| | - Chen Yan
- Aab Cardiovascular Research Institute, University of Rochester Medical Center, Rochester, NY 14642
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Haider HK, Lee YJ, Jiang S, Ahmed RPH, Ryon M, Ashraf M. Phosphodiesterase inhibition with tadalafil provides longer and sustained protection of stem cells. Am J Physiol Heart Circ Physiol 2010; 299:H1395-404. [PMID: 20833962 DOI: 10.1152/ajpheart.00437.2010] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We hypothesized that inhibition of the cGMP-specific enzyme phosphodiesterase 5A (PDE5A) promoted cGMP/protein kinase G (PKG) activity to condition stem cells for enhanced survival and proliferation. One-time tadalafil treatment (1 μM for 30 min) of mesenchymal stem cells ((Tada)MSCs) provided sustained protection of cells for 36 h. Higher cGMP activity with concomitantly increased PKG1 activity was observed in (Tada)MSCs, which peaked within 12 h after tadalafil treatment. Pretreatment with PKG1 blockers (1 μM KT-5823 or 20 nM K-252a) or transduction with adenoviral PKG1-short-hairpin RNA abolished tadalafil-induced cytoprotection of the cells. A higher proliferation rate was observed in (Tada)MSCs compared with nontreated MSCs ((Cont)MSCs). In a rat model of acute myocardial infarction, (Tada)MSCs transplanted 0 and 24 h after tadalafil treatment showed higher survival compared with (Cont)MSCs on day 2 and day 4 after engraftment. (Tada)MSCs transplanted 48 h after tadalafil treatment lost their protection on both day 2 and day 4 after engraftment, and their rate of survival was similar to (Cont)MSCs. Reduced terminal dUTP nick end-labeling positivity (P < 0.01 vs. (Cont)MSCs) and higher proliferation of (Tada)MSCs (P < 0.01 vs. (Cont)MSCs) was observed in the infarcted heart. Fluorescence immunostaining revealed neomyogenesis in both the infarct and peri-infarct areas. Blood vessel density was significantly increased in group 2 compared with group 1. Transthoracic echocardiographic heart function revealed significant preservation of the indexes of left ventricle contractility and attenuation of remodeling in (Tada)MSC-engrafted animal hearts (group 2) compared with (Cont)MSCs (group 1). PDE5A inhibition using long-acting tadalafil is an innovative approach to promote stem cell survival and proliferation in the infarcted heart.
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Affiliation(s)
- Husnain Kh Haider
- Department of Pathology, University of Cincinnati, Cincinnati, Ohio 45267-0529, USA
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Xu XH, Dong SS, Guo Y, Yang TL, Lei SF, Papasian CJ, Zhao M, Deng HW. Molecular genetic studies of gene identification for osteoporosis: the 2009 update. Endocr Rev 2010; 31:447-505. [PMID: 20357209 PMCID: PMC3365849 DOI: 10.1210/er.2009-0032] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2009] [Accepted: 02/02/2010] [Indexed: 12/12/2022]
Abstract
Osteoporosis is a complex human disease that results in increased susceptibility to fragility fractures. It can be phenotypically characterized using several traits, including bone mineral density, bone size, bone strength, and bone turnover markers. The identification of gene variants that contribute to osteoporosis phenotypes, or responses to therapy, can eventually help individualize the prognosis, treatment, and prevention of fractures and their adverse outcomes. Our previously published reviews have comprehensively summarized the progress of molecular genetic studies of gene identification for osteoporosis and have covered the data available to the end of September 2007. This review represents our continuing efforts to summarize the important and representative findings published between October 2007 and November 2009. The topics covered include genetic association and linkage studies in humans, transgenic and knockout mouse models, as well as gene-expression microarray and proteomics studies. Major results are tabulated for comparison and ease of reference. Comments are made on the notable findings and representative studies for their potential influence and implications on our present understanding of the genetics of osteoporosis.
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Affiliation(s)
- Xiang-Hong Xu
- Institute of Molecular Genetics, Xi'an Jiaotong University, Shaanxi, People's Republic of China
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Yang JC, Lee SY, Chen CA, Lin CT, Chen CC, Huang HM. The role of the calmodulin-dependent pathway in static magnetic field-induced mechanotransduction. Bioelectromagnetics 2010; 31:255-61. [PMID: 19953573 DOI: 10.1002/bem.20559] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
While the effects of static magnetic fields (SMFs) on osteoblastic differentiation are well demonstrated, the mechanotransduction pathways of SMFs are still unclear. The aim of this study was to explore the role of calmodulin in the biophysical effects of SMFs on osteoblastic cells. MG63 cells were exposed to a 0.4 T SMF. The expression of phosphodiesterase RNA in the cytoplasm was tested using real-time polymerase chain reaction. The differentiation of the cells was assessed by detecting changes in alkaline phosphatase activity. The role of calmodulin antagonist W-7 was used to evaluate alterations in osteoblastic proliferation and differentiation after the SMF simulations. Our results showed that SMF exposure increased alkaline phosphatase activity and phosphodiesterase 1C gene expression in MG63 cells. Addition of W-7 significantly inhibited the SMF-induced cellular response. We suggest that one possible mechanism by which SMFs affects osteoblastic maturation is through a calmodulin-dependent mechanotransduction pathway.
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Affiliation(s)
- Jen-Chang Yang
- Graduate Institute of Biomedical Materials and Engineering, Taipei Medical University, Taipei, Taiwan
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Ahlström M, Pekkinen M, Lamberg-Allardt C. Dexamethasone downregulates the expression of parathyroid hormone-related protein (PTHrP) in mesenchymal stem cells. Steroids 2009; 74:277-82. [PMID: 19121329 DOI: 10.1016/j.steroids.2008.12.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2008] [Revised: 10/28/2008] [Accepted: 12/04/2008] [Indexed: 11/26/2022]
Abstract
Parathyroid hormone-related protein (PTHrP) has been shown to have anabolic effects in women with postmenopausal osteoporosis. PTHrP promotes the recruitment of osteogenic cells and prevents apoptotic death of osteoblasts and osteocytes. The receptor responsible for the effects of PTHrP is the common PTH/PTHrP receptor (PTH1R). Glucocorticoids (GC) are commonly used as drugs to treat inflammatory diseases. Long-term GC treatments are often associated with bone loss which can lead to GC-induced osteoporosis. The aim of this work was to study the effects of the glucocorticoid dexamethasone (Dex) on the expression of PTHrP and PTH1R in adult human mesenchymal stem cells, the progenitor cells of osteoblasts. Adult human mesenchymal stem cells (hMSC) were cultured and differentiated by standard methods. The expression of PTHrP and PTH1R mRNA was assayed by real-time qPCR. The PTHrP release into the culture media was measured by an immunoradiometric assay. Treatment with Dex (10 nM) resulted in an 80% drop in the PTHrP release within 6 h. A 24 h Dex treatment also reduced the expression of PTHrP mRNA by up to 90%. The expression of PTH1R receptor mRNA was simultaneously increased up to 20-fold by 10 nM Dex. The effects of Dex on PTHrP and PTH1R were dose-dependent and experiments with the GC-receptor antagonist mifepristone showed an involvement of GC-receptors in these effects. In addition to the Dex-induced effects on PTHrP and PTH1R, Dex also increased mineralization and the expression of the osteoblast markers Runx2 and alkaline phosphatase. In our studies, we show that dexamethasone decreases the expression of PTHrP and increases the expression of the PTH1R receptor. This could have an impact on PTHrP-mediated anabolic actions on bone and could also affect the responsiveness of circulating PTH. The results indicate that glucocorticoids affect the signalling pathway of PTHrP by regulating both PTHrP and PTH1R expression and these mechanisms could be involved in glucocorticoid-induced osteoporosis.
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Affiliation(s)
- Mikael Ahlström
- Calcium Research Unit, Department of Applied Chemistry and Microbiology, P.O. Box 66, 00014 University of Helsinki, Finland.
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Cyclic nucleotide phosphodiesterase profiling reveals increased expression of phosphodiesterase 7B in chronic lymphocytic leukemia. Proc Natl Acad Sci U S A 2008; 105:19532-7. [PMID: 19033455 DOI: 10.1073/pnas.0806152105] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Cyclic nucleotide phosphodiesterase (PDE) isoforms can influence disease pathogenesis and be novel therapeutic targets. Because lower cAMP levels may contribute to the decreased apoptosis that occurs in chronic lymphocytic leukemia (CLL), we assessed the expression levels of PDE isoforms in peripheral blood mononuclear cells (PBMC) of healthy adults and patients with CLL. We found a unique PDE mRNA signature in CLL: higher levels than in normal PBMC of PDE7B (increased approximately 23-fold) and lower levels of PDE3B, 4D, 5A, and 9A mRNA (each decreased approximately 30-fold). Increased PDE7B mRNA in CLL correlates with a 10-fold-higher expression of PDE7B protein and results in an increased contribution of PDE7 to total PDE activity. Consistent with the higher level of PDE7B expression, inhibitors of PDE7 (BRL-50481, IR-202) and a dual PDE4/PDE7 inhibitor (IR-284) selectively increase apoptosis in CLL cells compared with normal PBMC or B cells. Apoptosis of CLL cells promoted by inhibitors of PDE7 and PDE4/7 is attenuated by PKA inhibition, occurs via a mitochondrial-dependent process, and is associated with increased cAMP accumulation and down-regulation of the antiapoptotic protein survivin and of PDE7B. The increase in PDE7B expression and PDE7 inhibitor-promoted apoptosis implicates PDE7B as a drug target in CLL. Our findings identify a unique PDE signature in CLL and illustrate the utility of broad analyses of PDE isoform expression in human disease.
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Gil C, Campillo NE, Perez DI, Martinez A. PDE7 inhibitors as new drugs for neurological and inflammatory disorders. Expert Opin Ther Pat 2008. [DOI: 10.1517/13543776.18.10.1127] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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