1
|
Guo L, Lan J, Li J, Song Y, Wang X, Zhao Y, Yuan Y. A novel bola-molecular self-assembling hydrogel for enhancing diabetic wound healing. J Colloid Interface Sci 2024; 659:385-396. [PMID: 38181702 DOI: 10.1016/j.jcis.2023.12.100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/02/2023] [Accepted: 12/16/2023] [Indexed: 01/07/2024]
Abstract
HYPOTHESIS Chronic wounds, particularly those caused by diabetes, pose a significant challenge for clinical treatment due to their prolonged healing process and associated complications, which can lead to increased morbidity. A biocompatible hydrogel with strong antibacterial properties and the ability to promote angiogenesis can be directly absorbed in the wound site for healing. EXPERIMENTS A series of self-healing, antibacterial bolaamphiphilic supramolecular self-assembling hydrogels (HLQMes/Cu) were developed based on metal-ligand coordination between various concentrations of Cu2+ solution and the head group of l-histidine methyl ester in HLQMes. This is the first report on the application of bola-molecular supramolecular hydrogels for the treatment of chronic wounds. FINDINGS The bola-molecular hydrogels reduced the toxicity of copper ions by coordination, and the HLQMes/Cu hydrogel, with 1.3 mg/mL Cu2+ (HLQMes/Cu1.3), demonstrated good biocompatibility and antibacterial properties and effectively enhanced wound healing in a diabetic wound model with full-thickness injuries. Immunohistochemical analysis revealed that the HLQMes/Cu1.3 hydrogel enhanced epithelial formation and collagen deposition in wounds. Immunofluorescence studies confirmed that the HLQMes/Cu1.3 hydrogel attenuated the expression of proinflammatory factor (IL-6) and promoted angiogenesis by upregulating α-SMA and CD31. These findings demonstrate the potential of this bolaamphiphilic supramolecular self-assembling hydrogel as a promising candidate for diabetic wound treatment.
Collapse
Affiliation(s)
- Linqing Guo
- School of Pharmacy, Shenyang Key Laboratory of Functional Drug Carrier Materials, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Jinxi Lan
- School of Pharmacy, Shenyang Key Laboratory of Functional Drug Carrier Materials, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Jianhua Li
- School of Pharmacy, Shenyang Key Laboratory of Functional Drug Carrier Materials, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Yibo Song
- School of Pharmacy, Shenyang Key Laboratory of Functional Drug Carrier Materials, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Xinlong Wang
- School of Pharmacy, Shenyang Key Laboratory of Functional Drug Carrier Materials, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Yongshan Zhao
- School of Life Science and Bio-pharmaceutics, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China.
| | - Yue Yuan
- School of Pharmacy, Shenyang Key Laboratory of Functional Drug Carrier Materials, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China.
| |
Collapse
|
2
|
Oh A, Koehler A, Yonker M, Troester M. Sleep Disorders and Chronic Pain Syndromes in the Pediatric Population. Semin Pediatr Neurol 2023; 48:101085. [PMID: 38065632 DOI: 10.1016/j.spen.2023.101085] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 08/18/2023] [Accepted: 09/13/2023] [Indexed: 12/18/2023]
Abstract
Sleep problems are widespread in children and adolescents suffering from chronic pain disorders. Sleep loss intensifies the experience of pain and is detrimental to the budding self-efficacy of a young individual with limitless horizons. Addressing sleep disorders may prevent the chronification of pain and prevent adverse health outcomes, such as functional impairment, psychiatric comorbidities and overall poor quality of life. This review will explore the cyclical nature between sleep, pain and mood, as well as the functional impact of this relationship on children and adolescents. There will be a discussion about sleep assessment and diagnostic testing, followed by a description of sleep disturbances found in specific pain conditions, ranging from headache, musculoskeletal/abdominal pain, to rheumatologic disorders. Finally, there will be a brief review of pharmacologic and behavioral interventions designed to improve sleep quality, and when possible, to alleviate pain.
Collapse
Affiliation(s)
- Ann Oh
- Division of Neurology, UCSF Pediatric Headache Center, University of California, San Francisco, UCSF Benioff Children's Hospital, Mission Hall, 550 16th Street, 5th Floor, San Francisco, CA 94158, USA.
| | - Angelina Koehler
- Division of Neurology, Pediatric Headache Program, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado
| | - Marcy Yonker
- Division of Neurology, Pediatric Headache Program, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado
| | | |
Collapse
|
3
|
Redkiewicz P, Dyniewicz J, Witkowska E, Misicka A, Lipiński PFJ. The influence of a synthetic growth hormone-releasing hormone analogue G11 and opioid peptide biphalin on selected fibroblasts parameters relevant to wound healing. J Pept Sci 2023; 29:e3487. [PMID: 36898693 DOI: 10.1002/psc.3487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 03/03/2023] [Accepted: 03/06/2023] [Indexed: 03/12/2023]
Abstract
The treatment of hard-to-heal chronic wounds is still a major medical problem and an economic and social burden. In this work, we examine the proregenerative potential of two peptides, G11 (a trypsin-resistant analogue of growth hormone-releasing hormone [GHRH]) and biphalin (opioid peptide), and their combination in vitro on human fibroblasts (BJ). G11, biphalin and their combination exhibited no toxicity against BJ cells. On the contrary, these treatments significantly stimulated proliferation and migration of fibroblasts. Under inflammatory conditions (LPS-induced BJ cells), we noticed that the tested peptides decreased the levels of cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS) and interleukin 1β (IL-1β). This was correlated with diminished phosphorylation levels of p38 kinase, but not those of ERK1/2. We found also that G11, biphalin and their combination activated the ERK1/2 signalling pathway, which has been previously implicated in promigratory activity of some regeneration enhancers, including opioids or GHRH analogues. Potential application of their combination requires further work, in particular in vivo experiments, in which the organism-level relevance of the discussed cell-level effects would be proven and, additionally, analgesic action of the opioid ingredient could be quantified.
Collapse
Affiliation(s)
- Patrycja Redkiewicz
- Department of Neuropeptides, Mossakowski Medical Research Institute Polish Academy of Sciences, 5 Pawińskiego Street, 02-106, Warsaw, Poland
| | - Jolanta Dyniewicz
- Department of Neuropeptides, Mossakowski Medical Research Institute Polish Academy of Sciences, 5 Pawińskiego Street, 02-106, Warsaw, Poland
| | - Ewa Witkowska
- Faculty of Chemistry, University of Warsaw, Warsaw, Poland
| | - Aleksandra Misicka
- Department of Neuropeptides, Mossakowski Medical Research Institute Polish Academy of Sciences, 5 Pawińskiego Street, 02-106, Warsaw, Poland
- Faculty of Chemistry, University of Warsaw, Warsaw, Poland
| | - Piotr F J Lipiński
- Department of Neuropeptides, Mossakowski Medical Research Institute Polish Academy of Sciences, 5 Pawińskiego Street, 02-106, Warsaw, Poland
| |
Collapse
|
4
|
Dong D, Cheng Z, Wang T, Wu X, Ding C, Chen Y, Xiong H, Liang J. Acid-degradable nanocomposite hydrogel and glucose oxidase combination for killing bacterial with photothermal augmented chemodynamic therapy. Int J Biol Macromol 2023; 234:123745. [PMID: 36806779 DOI: 10.1016/j.ijbiomac.2023.123745] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 02/13/2023] [Accepted: 02/14/2023] [Indexed: 02/19/2023]
Abstract
Bacterial infection often delays diabetic wound healing, and even causes serious life-threatening complications. Herein, we successfully developed a Cu2O/Pt nanocubes-dopping alginate (ALG)- hyaluronic acid (HA) hydrogel (Cu2O/Pt hydrogel) by simple assembly of the Cu2O/Pt nanocubes and the ALG-HA mixture. The Cu2O/Pt hydrogel combined with the glucose oxidase (GOx) can be used for photothermal- and starving-enhanced chemodynamic therapy (CDT) against Gram-negative and Gram-positive bacteria. The GOx can catalyze the glucose to produce gluconic acid and H2O2 for starvation therapy, following which the released Cu2O/Pt nanocubes react with H2O2 in the acidic microenvironment to generate highly cytotoxic hydroxyl radicals (·OH) for CDT. Additionally, the Cu2O/Pt hydrogel can release copper ions gradually with the decrease of pH induced by gluconic acid, which can increase the protein expression and secretion of vascular endothelial growth factor (VEGF) and promote endothelial cell proliferation, migration and angiogenesis, subsequently promoting diabetic wound healing in rats. Our results suggested that the Cu2O/Pt hydrogel combined with GOx may be a potential therapeutic approach for treating the infected diabetic wound.
Collapse
Affiliation(s)
- Dong Dong
- National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, Hubei Province Key Laboratory of Biotechnology of Chinese Traditional Medicine, State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, China
| | - Zihao Cheng
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, China
| | - Tongyao Wang
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, China
| | - Xingyu Wu
- National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, Hubei Province Key Laboratory of Biotechnology of Chinese Traditional Medicine, State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, China
| | - Chang Ding
- National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, Hubei Province Key Laboratory of Biotechnology of Chinese Traditional Medicine, State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, China
| | - Yong Chen
- National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, Hubei Province Key Laboratory of Biotechnology of Chinese Traditional Medicine, State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, China.
| | - Huayu Xiong
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, China.
| | - Jichao Liang
- National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, Hubei Province Key Laboratory of Biotechnology of Chinese Traditional Medicine, State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, China.
| |
Collapse
|
5
|
Topical Delivery of Cell-Penetrating Peptide-Modified Human Growth Hormone for Enhanced Wound Healing. Pharmaceuticals (Basel) 2023; 16:ph16030394. [PMID: 36986493 PMCID: PMC10053240 DOI: 10.3390/ph16030394] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/01/2023] [Accepted: 03/03/2023] [Indexed: 03/08/2023] Open
Abstract
Protein drugs have been emerging as a class of promising therapeutics. However, their topical application has been limited by their high molecular weight and poor permeability to the cell membrane. In this study, we aimed to enhance human growth hormone (hGH) permeability for topical application by conjugation of TAT peptide, a cell-penetrating peptide, to hGH via crosslinker. After TAT was conjugated to hGH, TAT-hGH was purified by affinity chromatography. TAT-hGH significantly increased cell proliferation compared with the control. Interestingly, the effect of TAT-hGH was higher than hGH at the same concentration. Furthermore, the conjugation of TAT to hGH enhanced the permeability of TAT-hGH across the cell membrane without affecting its biological activity in vitro. In vivo, the topical application of TAT-hGH into scar tissue markedly accelerated wound healing. Histological results showed that TAT-hGH dramatically promoted the re-epithelialization of wounds in the initial stage. These results demonstrate TAT-hGH as a new therapeutic potential drug for wound healing treatment. This study also provides a new method for topical protein application via enhancement of their permeability.
Collapse
|
6
|
Norouzi M, Nadjarzadeh A, Maleki M, Khayyatzadeh SS, Hosseini S, Yaseri M, Fattahi H. Evaluation of the recovery after heart surgery following preoperative supplementation with a combination of beta-hydroxy-beta-methylbutyrate, L-arginine, and L-glutamine: a double-blind randomized placebo-controlled clinical trial. Trials 2022; 23:649. [PMID: 35964137 PMCID: PMC9375058 DOI: 10.1186/s13063-022-06621-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 08/02/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The preoperative period is a good time to improve nutrition status, compensate for nutrient deficiencies, and optimize immune function in patients' underlying surgery. In some medical conditions, supplementation with a combination of L-glutamine (Gln), β-hydroxy-β-methylbutyrate (HMB), and L-arginine (Arg) had promising effects on improving recovery. The present study aimed to evaluate the effect of supplementation with Gln/Arg/HMB in patients undergoing heart surgery. METHODS This randomized clinical trial was conducted on 70 patients undergoing cardiac surgery. Participants were requested to consume 2 sachets of a combination of 7 g L-arginine, 7 g L-glutamine, and 1.5 g daily HMB or placebo 30 days before operation. At the baseline and end of the study, left ventricular ejection fraction and the serum levels of troponin, creatine phosphokinase (CPK), CPK-MB, alanine aminotransferase (ALT), aspartate aminotransferase (AST), and bilirubin were measured. Also, the Sequential Organ Failure Assessment (SOFA) score, time of stay in hospital and intensive care unit (ICU), and postoperative complications were recorded after surgery. RESULTS In total, 60 preoperative patients (30 in each group) with a mean age of 53.13 ± 14.35 years completed the study (attrition rate = 85.7%). Subjects in the Gln/Arg/HMB group had lower serum levels of CPK-MB (median [IQR] = 49 [39.75] vs. 83 [64.55]; P = 0.011), troponin (median [IQR] = 2.13 [1.89] vs. 4.34 [1.99]; P < 0.001), bilirubin (median [IQR] = 0.50 [0.20] vs. 0.40 [0.22]; P < 0.001), and SOFA score (median [IQR] = 2 [2] vs. 5 [2]; P < 0.001) at end of the study compared to the placebo. Also, the time of stay in the hospital (median [IQR] = 5 [1] vs. 6 [3]; P < 0.001) and ICU (median [IQR] = 2.50 [1.00] vs. 3.50 [1.50]; P = 0.002) was lower in the Gln/Arg/HMB group. CONCLUSION The present study showed that perioperative supplementation with a combination of Gln, Arg, and HMB enhances the recovery, reduces myocardial injury, and decreases the time of hospital and ICU stay in cardiac surgery patients. These results need to be confirmed in a larger trial. TRIAL REGISTRATION IRCT.ir IRCT20120913010826N31. Registered on 13 October 2020.
Collapse
Affiliation(s)
- Mona Norouzi
- Nutrition and Food Security Research Center, Shahid Sadoughi University of Medical Sciences, Shohadaye gomnam BLD., ALEM square, Yazd, Iran.,Department of Nutrition, International Campus of Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Azadeh Nadjarzadeh
- Nutrition and Food Security Research Center, Shahid Sadoughi University of Medical Sciences, Shohadaye gomnam BLD., ALEM square, Yazd, Iran. .,Department of Nutrition, Faculty of Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
| | - Majid Maleki
- Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Sayyed Saeid Khayyatzadeh
- Nutrition and Food Security Research Center, Shahid Sadoughi University of Medical Sciences, Shohadaye gomnam BLD., ALEM square, Yazd, Iran.,Department of Nutrition, Faculty of Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Saeid Hosseini
- Heart Valve Disease Research Center, Shahid Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mehdi Yaseri
- Department of Epidemiology and Biostatistics, Tehran University of Medical Science, Tehran, Iran
| | - Hamed Fattahi
- Cardiovascular Medical and Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| |
Collapse
|
7
|
Chen J, He J, Yang Y, Qiao L, Hu J, Zhang J, Guo B. Antibacterial adhesive self-healing hydrogels to promote diabetic wound healing. Acta Biomater 2022; 146:119-130. [PMID: 35483628 DOI: 10.1016/j.actbio.2022.04.041] [Citation(s) in RCA: 116] [Impact Index Per Article: 58.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 04/20/2022] [Accepted: 04/21/2022] [Indexed: 12/20/2022]
Abstract
The development of compressible, stretchable and self-healing hydrogel dressings with good adhesive, antibacterial and angiogenesis properties is needed to promote the regeneration of diabetic wounds in clinical applications. In this work, a series of self-healing, adhesive and antibacterial hydrogels based on gelatin methacrylate (GelMA), adenine acrylate (AA), and CuCl2 were designed through covalent bonding, coordination complexation of Cu2+ and carboxyl groups and hydrogen bonding to promote diabetic wound healing. These hydrogels exhibit efficient self-healing properties, remarkable fatigue resistance, and good adhesive properties due to the hydrogen bond and the metal-ligand coordination provided by the Cu2+ and the carboxyl group. The GelMA/AA/Cu1.0 hydrogel (containing 1.0 mg/mL Cu2+) with well-balanced biocompatibility and antibacterial properties exhibited efficient hemostatic performance in a mouse liver trauma model and significantly promoted the healing process in a full-thickness skin diabetic wound model. The immunohistochemistry results showed that the GelMA/AA/Cu1.0 hydrogel can promote regular epithelialization and collagen deposition when compared to the TegadermTM Film, GelMA hydrogel, and GelMA/AA/Cu0 hydrogel. The immunofluorescence results confirmed that the GelMA/AA/Cu1.0 hydrogel can reduce the expression of proinflammatory factors and promote angiogenesis. In conclusion, the GelMA/AA/Cu hydrogel is an effective wound dressing to promote the healing process of diabetic skin wounds. STATEMENT OF SIGNIFICANCE: Diabetic wounds exhibit an extremely high risk of bacterial infection and poor angiogenesis in a high-sugar environment, hindering their healing process. Hydrogel wound dressings are a promising wound care material that need to have stable and long-lasting adhesive properties, avoid shedding, provide lasting protection to wounds, antibacterial properties and promote angiogenesis. In this study, a series of self-healing, adhesive, and antibacterial hydrogels based on gelatin methacrylate (GelMA), acrylated adenine (AA), and CuCl2 were designed and synthesized via free radical polymerization, hydrogen bond, and ionic bond to promote diabetic wound healing. Overall, GelMA/AA/Cu hydrogels are promising materials to promote diabetic wound healing.
Collapse
|
8
|
A Novel Small Molecular Prostaglandin Receptor EP4 Antagonist, L001, Suppresses Pancreatic Cancer Metastasis. Molecules 2022; 27:molecules27041209. [PMID: 35208999 PMCID: PMC8879074 DOI: 10.3390/molecules27041209] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/06/2022] [Accepted: 02/07/2022] [Indexed: 01/30/2023] Open
Abstract
Metastatic pancreatic cancer remains a major clinical challenge, emphasizing the urgent need for the exploitation of novel therapeutic approaches with superior response. In this study, we demonstrate that the aberrant activation of prostaglandin E2 (PGE2) receptor 4 (EP4) is a pro-metastatic signal in pancreatic cancer. To explore the therapeutic role of EP4 signaling, we developed a potent and selective EP4 antagonist L001 with single-nanomolar activity using a panel of cell functional assays. EP4 antagonism by L001 effectively repressed PGE2-elicited cell migration and the invasion of pancreatic cancer cells in a dose-dependent manner. Importantly, L001 alone or combined with the chemotherapy drug gemcitabine exhibited remarkably anti-metastasis activity in a pancreatic cancer hepatic metastasis model with excellent tolerability and safety. Mechanistically, EP4 blockade by L001 abrogated Yes-associated protein 1 (YAP)-driven pro-metastatic factor expression in pancreatic cancer cells. The suppression of YAP’s activity was also observed upon L001 treatment in vivo. Together, these findings support the notions that EP4–YAP signaling axis is a vital pro-metastatic pathway in pancreatic cancer and that EP4 inhibition with L001 may deliver a therapeutic benefit for patients with metastatic pancreatic cancer.
Collapse
|
9
|
McKay TB, Priyadarsini S, Karamichos D. Sex Hormones, Growth Hormone, and the Cornea. Cells 2022; 11:cells11020224. [PMID: 35053340 PMCID: PMC8773647 DOI: 10.3390/cells11020224] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/03/2022] [Accepted: 01/07/2022] [Indexed: 12/31/2022] Open
Abstract
The growth and maintenance of nearly every tissue in the body is influenced by systemic hormones during embryonic development through puberty and into adulthood. Of the ~130 different hormones expressed in the human body, steroid hormones and peptide hormones are highly abundant in circulation and are known to regulate anabolic processes and wound healing in a tissue-dependent manner. Of interest, differential levels of sex hormones have been associated with ocular pathologies, including dry eye disease and keratoconus. In this review, we discuss key studies that have revealed a role for androgens and estrogens in the cornea with focus on ocular surface homeostasis, wound healing, and stromal thickness. We also review studies of human growth hormone and insulin growth factor-1 in influencing ocular growth and epithelial regeneration. While it is unclear if endogenous hormones contribute to differential corneal wound healing in common animal models, the abundance of evidence suggests that systemic hormone levels, as a function of age, should be considered as an experimental variable in studies of corneal health and disease.
Collapse
Affiliation(s)
- Tina B. McKay
- Department of Cell Biology, University of Oklahoma Health Sciences, Oklahoma City, OK 73104, USA;
| | | | - Dimitrios Karamichos
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
- Department of Pharmaceutical Sciences, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
- Correspondence: ; Tel.: +1-817-735-2101
| |
Collapse
|
10
|
Li H, Kang Z, He E, Wu X, Ma X, Yang D, Diao Y, Chen X. Fish-scale derived multifunctional nanofiber membrane for infected wound healing. Biomater Sci 2022; 10:5284-5300. [DOI: 10.1039/d2bm00646d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The rapid development of modern medicine has put forward new requirements for wound infection healing methods in clinical treatment. Despite great achievements have been made in the research and development...
Collapse
|
11
|
The Local Neuropeptide System of Keratinocytes. Biomedicines 2021; 9:biomedicines9121854. [PMID: 34944669 PMCID: PMC8698570 DOI: 10.3390/biomedicines9121854] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 12/05/2021] [Accepted: 12/06/2021] [Indexed: 12/13/2022] Open
Abstract
Neuropeptides have been known for over 50 years as chemical signals in the brain. However, it is now well established that the synthesis of this class of peptides is not restricted to neurons. For example, human skin not only expresses several functional receptors for neuropeptides but, also, can serve as a local source of neuroactive molecules such as corticotropin-releasing hormone, melanocortins, and β-endorphin. In contrast, an equivalent of the hypothalamic-pituitary axis in the oral mucosa has not been well characterized to date. In view of the differences in the morphology and function of oral mucosal and skin cells, in this review I surveyed the existing evidence for a local synthesis of hypothalamic-pituitary, opiate, neurohypophyseal, and neuroendocrine neuropeptides in both epidermal and oral keratinocytes.
Collapse
|
12
|
Özen İ, Wang X. Biomedicine: electrospun nanofibrous hormonal therapies through skin/tissue—a review. INT J POLYM MATER PO 2021. [DOI: 10.1080/00914037.2021.1985493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- İlhan Özen
- Textile Engineering Department, Erciyes University, Melikgazi, Kayseri, Turkey
| | - Xungai Wang
- Institute for Frontier Materials, Deakin University, Geelong, Australia
| |
Collapse
|
13
|
Liu Z, Ye J, Rauf A, Zhang S, Wang G, Shi S, Ning G. A flexible fibrous membrane based on copper(II) metal-organic framework/poly(lactic acid) composites with superior antibacterial performance. Biomater Sci 2021; 9:3851-3859. [PMID: 33890581 DOI: 10.1039/d1bm00164g] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A flexible antibacterial fibrous membrane employing high antibacterial efficiency has great potential in healthcare applications. Herein, a three-dimensional copper(ii) metal-organic framework [Cu2(CA)(H2O)2, Cu-MOF-1] and poly(lactic acid) (PLA) composite fibrous membrane was prepared through a facile electrospinning method. The sphere-like Cu-MOF-1 was rapidly synthesized by a microwave-assisted hydrothermal reaction of Cu(ii) salts with citric acid (H4CA) in the presence of polyvinyl pyrrolidone (PVP). The surface morphology, thermal stability, mechanical properties and hydrophilicity test of the as-prepared Cu-MOF-1/PLA fibrous membrane were studied systematically. Compared with commercial copper nanoparticles (Cu-NPs), citric acid and copper citrate, Cu-MOF-1 showed higher antibacterial properties with the bacteriostatic rates of 97.9% and 99.3% against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), respectively, when the used dose was 250 μg mL-1. The Cu-MOF-1/PLA fibrous membrane also exhibited outstanding bactericidal activities against E. coli and S. aureus with the antibacterial rates up to 99.3% and 99.8%, respectively. Mechanism investigation indicated that the slowly released Cu2+ ions could destroy the microenvironment of bacteria cells and destroy the integrity and permeability of the cell membrane, leading to enzyme inactivation. Therefore, the as-prepared flexible fibrous membrane will advance progress toward developing a broad spectrum antibacterial textile for healthcare protection related applications.
Collapse
Affiliation(s)
- Zhao Liu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian, Liaoning 116024, P. R. China.
| | - Junwei Ye
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian, Liaoning 116024, P. R. China. and Engineering Laboratory of Boric and Magnesic Functional Material Preparative and Applied Technology, 2 Linggong Road, Dalian, Liaoning 116024, P. R. China
| | - Abdul Rauf
- Department of Chemistry, School of Science, University of Management and Technology, CII, Johar Town, Lahore, 54770, Pakistan
| | - Siqi Zhang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian, Liaoning 116024, P. R. China.
| | - Guangyao Wang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian, Liaoning 116024, P. R. China.
| | - Suqi Shi
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian, Liaoning 116024, P. R. China.
| | - Guiling Ning
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian, Liaoning 116024, P. R. China. and Engineering Laboratory of Boric and Magnesic Functional Material Preparative and Applied Technology, 2 Linggong Road, Dalian, Liaoning 116024, P. R. China
| |
Collapse
|
14
|
Wang K, Ding L, Yang C, Hao X, Wang C. Exploring the Relationship Between Psychiatric Traits and the Risk of Mouth Ulcers Using Bi-Directional Mendelian Randomization. Front Genet 2020; 11:608630. [PMID: 33424931 PMCID: PMC7793678 DOI: 10.3389/fgene.2020.608630] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 11/09/2020] [Indexed: 12/26/2022] Open
Abstract
Background Although the association between mouth ulcers and psychiatric traits has been reported by observational studies, their causal relationship remains unclear. Mendelian randomization (MR), powered by large-scale genome-wide association studies (GWAS), provides an opportunity to clarify the causality between mouth ulcers and psychiatric traits. Methods We collected summary statistics of mouth ulcers (sample size n = 461,106) and 10 psychiatric traits from the largest publicly available GWAS on Europeans, including anxiety disorder (n = 83,566), attention deficit/hyperactivity disorder (n = 53,293), autism spectrum disorder (n = 46,350), bipolar disorder (n = 51,710), insomnia (n = 1,331,010), major depressive disorder (n = 480,359), mood instability (n = 363,705), neuroticism (n = 168,105), schizophrenia (n = 105,318), and subjective wellbeing (n = 388,538). We applied three two-sample bi-directional MR analysis methods, namely the Inverse Variance Weighted (IVW) method, the MR pleiotropy residual sum and outlier (MR-PRESSO) method, and the weighted median method, to assess the causal relationship between each psychiatric trait and mouth ulcers. Results We found significant effects of autism spectrum disorder, insomnia, major depressive disorder, and subjective wellbeing on mouth ulcers, with the corresponding odds ratio (OR) from the IVW method being 1.160 [95% confidence interval (CI): 1.066–1.261, P = 5.39 × 10–4], 1.092 (1.062–1.122, P = 3.37 × 10–10), 1.234 (1.134–1.342, P = 1.03 × 10–6), and 0.703 (0.571–0.865, P = 8.97 × 10–4), respectively. We also observed suggestive evidence for mood instability to cause mouth ulcers [IVW, OR = 1.662 (1.059–2.609), P = 0.027]. These results were robust to weak instrument bias and heterogeneity. We found no evidence on causal effects between other psychiatric traits and mouth ulcers, in either direction. Conclusion Our findings suggest a protective effect of subjective wellbeing and risk effects of autism spectrum disorder, insomnia, major depressive disorder, and mood instability on mouth ulcers. These results clarify the causal relationship between psychiatric traits and the development of mouth ulcers.
Collapse
Affiliation(s)
- Kai Wang
- Key Laboratory for Environment and Health, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lin Ding
- Key Laboratory for Environment and Health, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Can Yang
- Department of Mathematics, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Xingjie Hao
- Key Laboratory for Environment and Health, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chaolong Wang
- Key Laboratory for Environment and Health, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
15
|
Chaves LH, Giovanini AF, Zielak JC, Scariot R, Gonzaga CC, Storrer CLM, Khajotia SS, Esteban Florez FL, Deliberador TM. Growth hormone effects on healing efficacy, bone resorption and renal morphology of rats: histological and histometric study in rat calvaria. Heliyon 2020; 6:e05226. [PMID: 33102851 PMCID: PMC7575886 DOI: 10.1016/j.heliyon.2020.e05226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 06/18/2020] [Accepted: 10/08/2020] [Indexed: 01/11/2023] Open
Abstract
Previous reports demonstrated the utility of systemic application of growth hormone (GH) in the treatment of bone defects. Very few studies correlated bone repair efficacy with hepatic and renal side effects promoted by locally-delivered GH. The objectives of this study were to assess the bone repair properties along with hepatic and renal adverse effects promoted by local application of GH in a rat model. Thirty-two rats were randomly divided (4 groups; n = 8/group), as follows: (i) AB (autogenous bone + local application of saline solution [SS]), (ii) AB+ (autogenous bone + SS local application + SS irrigation), (iii) AB/GH+ (autogenous bone + SS local application + GH irrigation) and (iv) AB/GHL+ (autogenous bone + GH local application + GH irrigation). Critical-sized defects (diameter = 5.0 mm) were surgically created by a single operator in the calvaria of rats. Defects were filled with ground autogenous bone. Defects pertaining to AB+ and AB/GH+ received a mixture of autogenous bone and a SS-saturated (0.02 mL) collagen sponge covered with bovine cortical membrane. Defects in group AB/GHL+, were filled with the same biomaterials saturated with GH (0.02 mL). SS (0.1 mL) or GH (0.1 mL, equivalent to 0.4 IU) were applied locally on alternate days (8 weeks) in animals in groups AB, AB+ and AB/GH+ or AB/GHL+, respectively. Bone repair properties was determined in hematoxylin/eosin-stained slices using traditional histologic and histomorphometric techniques along with optical microscopy and digital image analysis. Statistical differences among groups was determined using Kruskal-Wallis and Tukey post hoc tests (α = 0.05). Histology results indicated that AB and AB+ displayed greater presence of autogenous bone as compared to AB/GH+ and AB/GHL+. Histomorphometric results indicated significantly higher osteoid matrix formation in AB and AB+ when compared to AB/GHL+ (p = 0.009). Kidneys and livers were found to have their glomeruli preserved in AB and AB+. Strong glomeruli necrosis and large areas of protein deposition were found in AB/GH+. Abnormal small-sized glomeruli were found in AB/GHL+. The utilization of autogenous bone graft associated with local application and irrigation with GH was shown to not improve the bone repair in calvarial critical-sized defects in a rat model.
Collapse
Affiliation(s)
- Luis Henrique Chaves
- School of Health Sciences, Graduate Program in Dentistry, Universidade Positivo, Rua Prof. Pedro Viriato Parigot de Souza 5300, Curitiba, Paraná 81280-330, Brazil
| | - Allan Fernando Giovanini
- School of Health Sciences, Graduate Program in Dentistry, Universidade Positivo, Rua Prof. Pedro Viriato Parigot de Souza 5300, Curitiba, Paraná 81280-330, Brazil
| | - Joao Cesar Zielak
- School of Health Sciences, Graduate Program in Dentistry, Universidade Positivo, Rua Prof. Pedro Viriato Parigot de Souza 5300, Curitiba, Paraná 81280-330, Brazil
| | - Rafaela Scariot
- School of Health Sciences, Graduate Program in Dentistry, Universidade Positivo, Rua Prof. Pedro Viriato Parigot de Souza 5300, Curitiba, Paraná 81280-330, Brazil
| | - Carla Castiglia Gonzaga
- School of Health Sciences, Graduate Program in Dentistry, Universidade Positivo, Rua Prof. Pedro Viriato Parigot de Souza 5300, Curitiba, Paraná 81280-330, Brazil
| | - Carmen Lucia Mueller Storrer
- School of Health Sciences, Graduate Program in Dentistry, Universidade Positivo, Rua Prof. Pedro Viriato Parigot de Souza 5300, Curitiba, Paraná 81280-330, Brazil
| | - Sharukh Soli Khajotia
- Department of Restorative Sciences Division of Dental Biomaterials, College of Dentistry, University of Oklahoma Health Sciences Center, 1201 N. Stonewall Ave., Oklahoma City, Oklahoma, 73117, USA
| | - Fernando Luis Esteban Florez
- Department of Restorative Sciences Division of Dental Biomaterials, College of Dentistry, University of Oklahoma Health Sciences Center, 1201 N. Stonewall Ave., Oklahoma City, Oklahoma, 73117, USA
| | - Tatiana Miranda Deliberador
- School of Health Sciences, Graduate Program in Dentistry, Universidade Positivo, Rua Prof. Pedro Viriato Parigot de Souza 5300, Curitiba, Paraná 81280-330, Brazil
| |
Collapse
|
16
|
Iwase H, Ball S, Adams K, Eyestone W, Walters A, Cooper DKC. Growth hormone receptor knockout: Relevance to xenotransplantation. Xenotransplantation 2020; 28:e12652. [PMID: 33058285 DOI: 10.1111/xen.12652] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 09/03/2020] [Accepted: 09/15/2020] [Indexed: 02/06/2023]
Abstract
Xenotransplantation research has made considerable progress in recent years, largely through the increasing availability of pigs with multiple genetic modifications, effective immunosuppressive therapy, and anti-inflammatory therapy to protect pig tissues from the primate immune and inflammatory responses and correct molecular incompatibilities. Further study is required regarding identification and investigation of physiological incompatibilities. Although the exact cause remains uncertain, we and others have observed relatively rapid growth of kidney xenografts after transplantation into nonhuman primates (NHPs). There has also been some evidence of growth, or at least ventricular hypertrophy, of the pig heart after orthotopic transplantation into NHPs. Rapid growth could be problematic, particularly with regard to the heart within the relatively restricted confines of the chest. It has been suggested that the problem of rapid growth of the pig organ after transplantation could be resolved by growth hormone receptor (GHR) gene knockout in the pig. The GHR, although most well-known for regulating growth, has many other biological functions, including regulating metabolism and controlling physiological processes. Genetically modified GHRKO pigs have recently become available. We provide data on their growth compared to comparable pigs that do not include GHRKO, and we have reviewed the literature regarding the effect of GHRKO, and its relevance to xenotransplantation.
Collapse
Affiliation(s)
- Hayato Iwase
- Xenotransplantation Program, Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, USA
| | | | | | | | | | - David K C Cooper
- Xenotransplantation Program, Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, USA
| |
Collapse
|
17
|
Duan J, Chen Z, Liang X, Chen Y, Li H, Tian X, Zhang M, Wang X, Sun H, Kong D, Li Y, Yang J. Construction and application of therapeutic metal-polyphenol capsule for peripheral artery disease. Biomaterials 2020; 255:120199. [DOI: 10.1016/j.biomaterials.2020.120199] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 04/02/2020] [Accepted: 06/09/2020] [Indexed: 01/10/2023]
|
18
|
Zhang S, Ye J, Liu Z, Lu H, Shi S, Qi Y, Ning G. Superior antibacterial activity of Fe 3O 4@copper(ii) metal-organic framework core-shell magnetic microspheres. Dalton Trans 2020; 49:13044-13051. [PMID: 32915182 DOI: 10.1039/d0dt02417a] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
With the rapid evolution of antibiotic resistant bacteria, it has become more and more difficult to treat bacterial infection with traditional antibiotics. Therefore, new strategies with high antibacterial efficiency are urgently needed to combat bacteria effectively. Herein, Fe3O4@copper(ii) metal-organic framework Cu3(BTC)2 (Cu-BTC) core-shell structured magnetic microspheres were prepared via a layer by layer growth process. The as-prepared Fe3O4@Cu-BTC possessed a unique broad-spectrum antibacterial potency against Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus aureus (S. aureus). The slowly released copper ions and enhanced reactive oxygen species (ROS) generation by facilitating the effective separation and transfer of photoexcited electron-hole pairs played a role in the antibacterial activity of Fe3O4@Cu-BTC. Copper ions released from Fe3O4@Cu-BTC adhered to the negatively charged bacterial cell, interacted with the bacterial membrane, destroyed the integrity of the membrane which resulted in leakage of bacterial content and then generated ROS to damage DNA, thus leading to cell death. Accordingly, this study provides a competitive strategy for preparing recyclable antibacterial materials that are endowed with targeted antibacterial therapy.
Collapse
Affiliation(s)
- Siqi Zhang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian, Liaoning 116024, PR China.
| | | | | | | | | | | | | |
Collapse
|
19
|
Qin YJ, Chan SO, Lin HL, Zhang YQ, He BT, Zhang L, Yu HH, Chu WK, Pang CP, Zhang HY. Increased Expression of Growth Hormone-Releasing Hormone in Fibrinous Inflammation of Proliferative Diabetic Retinopathy. Am J Ophthalmol 2020; 215:81-90. [PMID: 32061756 DOI: 10.1016/j.ajo.2020.02.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 02/01/2020] [Accepted: 02/05/2020] [Indexed: 02/05/2023]
Abstract
PURPOSE To investigate the involvement of growth hormone-releasing hormone (GHRH) - growth hormone (GH) signaling in pathogenesis of proliferative diabetic retinopathy (PDR). DESIGN Experimental laboratory study. METHODS Vitreous humor, aqueous humor, and serum were obtained from 36 eyes of 36 patients with or without type 2 diabetes from 2017 to 2019. For histologic examination, 6 fibrovascular membranes were excised from eyes with active PDR. Three fibrovascular membranes were excised from nondiabetic patients with proliferative vitreoretinopathy (PVR) as controls. RESULTS In PDR, the fibrovascular tissues consisted of a mature region containing fibrocytes, and an immature region populated by abundant polymorphonuclear leukocytes in a fibrinogen meshwork. Clusters of leukocytes were found adhering to the vascular walls. In PVR, no fibrinogen and polymorphonuclear leukocyte was observed in the fibrovascular membranes. The levels of GHRH and GH in PDR were significantly increased (P < .001), with 1.8-fold and 72.8-fold in vitreous humor, and 2-fold and 4.9-fold in aqueous humor, respectively, when compared with corresponding levels in controls. No significant difference was detected for insulin-like growth factor-1. Immunohistochemistry showed intense expression of GHRH and its receptor GHRH-R in polymorphonuclear leukocytes, vascular endothelial cells, and fibrocytes in fibrovascular membranes of PDR. GHRH staining was not detectable in infiltrating cells within the fibrovascular membrane of PVR. CONCLUSIONS These findings reveal a possible involvement of GHRH/GHRH-R in fibrinous inflammation that might contribute to the formation of fibrovascular membrane in PDR through mediating activities of leukocytes, vascular endothelial cells, and fibrocytes. Targeting GHRH/GHRH-R may be considered as a potential therapeutic approach for the treatment of PDR.
Collapse
Affiliation(s)
- Yong Jie Qin
- Department of Ophthalmology, Guangdong Eye Institute, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, Guangzhou, China
| | - Sun On Chan
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong
| | - Hong Liang Lin
- Department of Ophthalmology, Guangdong Eye Institute, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, Guangzhou, China; Shantou University Medical College, Shantou, China
| | - Yu Qiao Zhang
- Department of Ophthalmology, Guangdong Eye Institute, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, Guangzhou, China; Shantou University Medical College, Shantou, China
| | - Bei Ting He
- Department of Ophthalmology, Guangdong Eye Institute, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, Guangzhou, China; School of Medicine, South China University of Technology, Guangzhou, China
| | - Liang Zhang
- Department of Ophthalmology, Guangdong Eye Institute, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, Guangzhou, China
| | - Hong Hua Yu
- Department of Ophthalmology, Guangdong Eye Institute, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, Guangzhou, China
| | - Wai Kit Chu
- Department of Ophthalmology & Visual Sciences, The Chinese University of Hong Kong, Hong Kong
| | - Chi Pui Pang
- Department of Ophthalmology & Visual Sciences, The Chinese University of Hong Kong, Hong Kong
| | - Hong Yang Zhang
- Department of Ophthalmology, Guangdong Eye Institute, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, Guangzhou, China.
| |
Collapse
|
20
|
Qiao Y, He J, Chen W, Yu Y, Li W, Du Z, Xie T, Ye Y, Hua SY, Zhong D, Yao K, Zhou M. Light-Activatable Synergistic Therapy of Drug-Resistant Bacteria-Infected Cutaneous Chronic Wounds and Nonhealing Keratitis by Cupriferous Hollow Nanoshells. ACS NANO 2020; 14:3299-3315. [PMID: 32048825 DOI: 10.1021/acsnano.9b08930] [Citation(s) in RCA: 108] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Due to the inability to spontaneously heal and vulnerability to bacterial infection, diabetic patients are frustrated by unexpected epithelium injuries in daily life. Notably, a drug-resistant bacterial infection may result in a long-term impact to the natural function of damaged organs. It is imperative to develop strategies that promote injury recovery and eradicate drug-resistant infection simultaneously. Here, we present a composite structured cupriferous hollow nanoshell (AuAgCu2O NS) that consists of a hollow gold-silver (AuAg) core and Cu2O shell as a photothermal therapeutic agent for a cutaneous chronic wound and nonhealing keratitis with drug-resistant bacterial infection. The controllable photothermal therapeutic effect and released silver ion from the hollow AuAg core possess a synergistic effect to eradicate multi-drug-resistant bacteria, including extended-spectrum β-lactamase Escherichia coli (ESBL E. coli) and methicillin-resistant Staphylococcus aureus (MRSA). Meanwhile, the released copper ion from the Cu2O shell could expedite endothelial cell angiogenesis and fibroblast cell migration, thus boosting wound-healing effects. In both infection-complicated disease models, the ophthalmic clinical score, wound closure rates, and histopathology analysis demonstrate that the AuAgCu2O NSs could facilitate the re-epithelialization at the wound area and eliminate the complicated bacterial infection from diabetic mice. A primary signal path involved in the promoted healing effect was further illustrated by comprehensive assays of immunohistochemical evaluation, Western blot, and quantitative polymerase chain reaction. Taken together, our AuAgCu2O NSs are shown to be potent candidates for clinical utilization in the treatment of diabetic epithelium injuries.
Collapse
Affiliation(s)
- Yue Qiao
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Institute of Translational Medicine, Zhejiang University, Hangzhou 310009, China
| | - Jian He
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Institute of Translational Medicine, Zhejiang University, Hangzhou 310009, China
| | - Weiyu Chen
- Molecular Imaging Program at Stanford, Department of Radiology, Stanford University, Stanford, California 94305-5427, United States
| | - Yinhui Yu
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou 310009, China
| | - Wanlin Li
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Institute of Translational Medicine, Zhejiang University, Hangzhou 310009, China
| | - Zhen Du
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Institute of Translational Medicine, Zhejiang University, Hangzhou 310009, China
| | - Tingting Xie
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Institute of Translational Medicine, Zhejiang University, Hangzhou 310009, China
| | - Yang Ye
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou 310009, China
| | - Shi Yuan Hua
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Institute of Translational Medicine, Zhejiang University, Hangzhou 310009, China
| | - Danni Zhong
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Institute of Translational Medicine, Zhejiang University, Hangzhou 310009, China
| | - Ke Yao
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou 310009, China
| | - Min Zhou
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Institute of Translational Medicine, Zhejiang University, Hangzhou 310009, China
- Key Laboratory of Cancer Prevention and Intervention, National Ministry of Education, Zhejiang University, Hangzhou 310009, China
- State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou 310058, China
| |
Collapse
|
21
|
Signaling mechanisms of growth hormone-releasing hormone receptor in LPS-induced acute ocular inflammation. Proc Natl Acad Sci U S A 2020; 117:6067-6074. [PMID: 32123064 DOI: 10.1073/pnas.1904532117] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Ocular inflammation is a major cause of visual impairment attributed to dysregulation of the immune system. Previously, we have shown that the receptor for growth-hormone-releasing hormone (GHRH-R) affects multiple inflammatory processes. To clarify the pathological roles of GHRH-R in acute ocular inflammation, we investigated the inflammatory cascades mediated by this receptor. In human ciliary epithelial cells, the NF-κB subunit p65 was phosphorylated in response to stimulation with lipopolysaccharide (LPS), resulting in transcriptional up-regulation of GHRH-R. Bioinformatics analysis and coimmunoprecipitation showed that GHRH-R had a direct interaction with JAK2. JAK2, but not JAK1, JAK3, and TYK2, was elevated in ciliary body and iris after treatment with LPS in a rat model of endotoxin-induced uveitis. This elevation augmented the phosphorylation of STAT3 and production of proinflammatory factors, including IL-6, IL-17A, COX2, and iNOS. In explants of iris and ciliary body, the GHRH-R antagonist, MIA-602, suppressed phosphorylation of STAT3 and attenuated expression of downstream proinflammatory factors after LPS treatment. A similar suppression of STAT3 phosphorylation was observed in human ciliary epithelial cells. In vivo studies showed that blocking of the GHRH-R/JAK2/STAT3 axis with the JAK inhibitor Ruxolitinib alleviated partially the LPS-induced acute ocular inflammation by reducing inflammatory cells and protein leakage in the aqueous humor and by repressing expression of STAT3 target genes in rat ciliary body and iris and in human ciliary epithelial cells. Our findings indicate a functional role of the GHRH-R/JAK2/STAT3-signaling axis in acute anterior uveitis and suggest a therapeutic strategy based on treatment with antagonists targeting this signaling pathway.
Collapse
|
22
|
Bio-application of Inorganic Nanomaterials in Tissue Engineering. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1249:115-130. [PMID: 32602094 DOI: 10.1007/978-981-15-3258-0_8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Inorganic nanomaterials or nanoparticles (INPs) have drawn high attention for their usage in the biomedical field. In addition to the facile synthetic and modifiable property of INPs, INPs have various unique properties that originate from the components of the INPs, such as metal ions that are essential for the human body. Apart from their roles as components of the human body, inorganic materials have unique properties, such as magnetic, antibacterial, and piezoelectric, so that INPs have been widely used as either carriers or inducers. However, most of the bio-applicable INPs, especially those consisting of metal, can cause cytotoxicity. Therefore, INPs require modification to alleviate the harmful effect toward the cells by controlling the release of metal ions from INPs. Even though many attempts have been made to modify INPs, many things, including the side effects of INPs, still remain as obstacles in the bio-application, which need to be elucidated. In this chapter, we introduce novel INPs in terms of their synthetic method and bio-application in tissue engineering.
Collapse
|
23
|
Schally AV, Zhang X, Cai R, Hare JM, Granata R, Bartoli M. Actions and Potential Therapeutic Applications of Growth Hormone-Releasing Hormone Agonists. Endocrinology 2019; 160:1600-1612. [PMID: 31070727 DOI: 10.1210/en.2019-00111] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 04/03/2019] [Indexed: 11/19/2022]
Abstract
In this article, we briefly review the identification of GHRH, provide an abridged overview of GHRH antagonists, and focus on studies with GHRH agonists. Potent GHRH agonists of JI and MR class were synthesized and evaluated biologically. Besides the induction of the release of pituitary GH, GHRH analogs promote cell proliferation and exert stimulatory effects on various tissues, which express GHRH receptors (GHRH-Rs). A large body of work shows that GHRH agonists, such as MR-409, improve pancreatic β-cell proliferation and metabolic functions and facilitate engraftment of islets after transplantation in rodents. Accordingly, GHRH agonists offer a new therapeutic approach to treating diabetes. Various studies demonstrate that GHRH agonists promote repair of cardiac tissue, producing improvement of ejection fraction and reduction of infarct size in rats, reduction of infarct scar in swine, and attenuation of cardiac hypertrophy in mice, suggesting clinical applications. The presence of GHRH-Rs in ocular tissues and neuroprotective effects of GHRH analogs in experimental diabetic retinopathy indicates their possible therapeutic applications for eye diseases. Other effects of GHRH agonists, include acceleration of wound healing, activation of immune cells, and action on the central nervous system. As GHRH might function as a growth factor, we examined effects of GHRH agonists on tumors. In vitro, GHRH agonists stimulate growth of human cancer cells and upregulate GHRH-Rs. However, in vivo, GHRH agonists inhibit growth of human cancers xenografted into nude mice and downregulate pituitary and tumoral GHRH-Rs. Therapeutic applications of GHRH analogs are discussed. The development of GHRH analogs should lead to their clinical use.
Collapse
Affiliation(s)
- Andrew V Schally
- Veterans Affairs Medical Center, Miami, Florida
- Department of Pathology, Miller School of Medicine, University of Miami, Miami, Florida
- Department of Medicine, Miller School of Medicine, University of Miami, Miami, Florida
- Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida
| | - Xianyang Zhang
- Interdisciplinary Stem Cell Institute, Miller School of Medicine, University of Miami, Miami, Florida
| | - Renzhi Cai
- Veterans Affairs Medical Center, Miami, Florida
| | - Joshua M Hare
- Department of Medicine, Miller School of Medicine, University of Miami, Miami, Florida
- Interdisciplinary Stem Cell Institute, Miller School of Medicine, University of Miami, Miami, Florida
| | - Riccarda Granata
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - Manuela Bartoli
- Department of Ophthalmology, Medical College of Georgia, Augusta University, Augusta, Georgia
| |
Collapse
|
24
|
Geng W, Shi H, Zhang X, Tan W, Cao Y, Mei R. Substance P enhances BMSC osteogenic differentiation via autophagic activation. Mol Med Rep 2019; 20:664-670. [PMID: 31115537 PMCID: PMC6580032 DOI: 10.3892/mmr.2019.10257] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 04/12/2019] [Indexed: 01/09/2023] Open
Abstract
Bone mesenchymal stem cells (BMSCs) are the most commonly investigated progenitor cells in bone tissue engineering for treating severe bone defects. Strategies for regulating BMSC differentiation fate have received wide attention, in which redox homeostasis plays an important role due to the change in energy metabolism during stem cell differentiation. In the present study, it was observed that autophagic activity was induced along with BMSC osteogenic differentiation and subsequently regulated reactive oxygen species (ROS) generation and the level of osteogenesis. Furthermore, it was also observed that neuropeptide substance P (SP) administration could enhance the autophagic activity in rat BMSCs via the AMPK and mTOR pathways, as well as decreasing ROS generation and promoting osteogenic differentiation. Inhibition of autophagic activity by 3‑MA reversed the effects of SP on ROS and osteogenic levels. The present results indicated that autophagic activity participated in the regulation of differentiation fate of BMSCs and SP could promote osteogenic differentiation by activating autophagy, providing a more precise biological mechanism for its application in bone tissue engineering.
Collapse
Affiliation(s)
- Wen Geng
- Department of Orthopaedics, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei 441021, P.R. China
| | - Huimin Shi
- Department of Ophthalmology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei 441021, P.R. China
| | - Ximin Zhang
- Department of Orthopaedics, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei 441021, P.R. China
| | - Wei Tan
- Department of Orthopaedics, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei 441021, P.R. China
| | - Yuan Cao
- Department of Orthopaedics, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei 441021, P.R. China
| | - Rongcheng Mei
- Department of Orthopaedics, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei 441021, P.R. China
| |
Collapse
|
25
|
Liu YR, Sun B, Zhu GH, Li WW, Tian YX, Wang LM, Zong SM, Sheng PZ, Li M, Chen S, Qin Y, Liu HJ, Zhou HG, Sun T, Yang C. Selenium–lentinan inhibits tumor progression by regulating epithelial–mesenchymal transition. Toxicol Appl Pharmacol 2018; 360:1-8. [DOI: 10.1016/j.taap.2018.09.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 09/07/2018] [Accepted: 09/16/2018] [Indexed: 10/28/2022]
|
26
|
Inhibition of tumor growth by agonists of growth hormone-releasing hormone. Proc Natl Acad Sci U S A 2018; 115:11876-11878. [PMID: 30404912 DOI: 10.1073/pnas.1817342115] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
|
27
|
Agonists of growth hormone-releasing hormone (GHRH) inhibit human experimental cancers in vivo by down-regulating receptors for GHRH. Proc Natl Acad Sci U S A 2018; 115:12028-12033. [PMID: 30373845 DOI: 10.1073/pnas.1813375115] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The effects of the growth hormone-releasing hormone (GHRH) agonist MR409 on various human cancer cells were investigated. In H446 small cell lung cancer (SCLC) and HCC827 and H460 (non-SCLC) cells, MR409 promoted cell viability, reduced cell apoptosis, and induced the production of cellular cAMP in vitro. Western blot analyses showed that treatment of cancer cells with MR409 up-regulated the expression of cyclins D1 and D2 and cyclin-dependent kinases 4 and 6, down-regulated p27kip1, and significantly increased the expression of the pituitary-type GHRH receptor (pGHRH-R) and its splice-variant (SV1). Hence, in vitro MR409 exerts agonistic action on lung cancer cells in contrast to GHRH antagonists. However, in vivo, MR409 inhibited growth of lung cancers xenografted into nude mice. MR409 given s.c. at 5 μg/day for 4 to 8 weeks significantly suppressed growth of HCC827, H460, and H446 tumors by 48.2%, 48.7%, and 65.6%, respectively. This inhibition of tumor growth by MR409 was accompanied by the down-regulation of the expression of pGHRH-R and SV1 in the pituitary gland and tumors. Tumor inhibitory effects of MR409 in vivo were also observed in other human cancers, including gastric, pancreatic, urothelial, prostatic, mammary, and colorectal. This inhibition of tumor growth parallel to the down-regulation of GHRH-Rs is similar and comparable to the suppression of sex hormone-dependent cancers after the down-regulation of receptors for luteinizing hormone-releasing hormone (LHRH) by LHRH agonists. Further oncological investigations with GHRH agonists are needed to elucidate the underlying mechanisms.
Collapse
|
28
|
Kim B, Jang C, Dharaneeswaran H, Li J, Bhide M, Yang S, Li K, Arany Z. Endothelial pyruvate kinase M2 maintains vascular integrity. J Clin Invest 2018; 128:4543-4556. [PMID: 30222136 PMCID: PMC6159968 DOI: 10.1172/jci120912] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 07/26/2018] [Indexed: 12/25/2022] Open
Abstract
The M2 isoform of pyruvate kinase (PKM2) is highly expressed in most cancer cells, and has been studied extensively as a driver of oncogenic metabolism. In contrast, the role of PKM2 in nontransformed cells is little studied, and nearly nothing is known of its role, if any, in quiescent cells. We show here that endothelial cells express PKM2 almost exclusively over PKM1. In proliferating endothelial cells, PKM2 is required to suppress p53 and maintain cell cycle progression. In sharp contrast, PKM2 has a strikingly different role in quiescent endothelial cells, where inhibition of PKM2 leads to degeneration of tight junctions and barrier function. Mechanistically, PKM2 regulates barrier function independently of its canonical activity as a pyruvate kinase. Instead, PKM2 suppresses NF-kB and its downstream target, the vascular permeability factor angiopoietin 2. As a consequence, loss of endothelial cell PKM2 in vivo predisposes mice to VEGF-induced vascular leak, and to severe bacteremia and death in response to sepsis. Together, these data demonstrate new roles of PKM2 in quiescent cells, and highlight the need for caution in developing cancer therapies that target PKM2.
Collapse
Affiliation(s)
- Boa Kim
- Cardiovascular Institute and Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Cholsoon Jang
- Department of Chemistry and Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, New Jersey, USA
| | - Harita Dharaneeswaran
- Cardiovascular Institute and Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jian Li
- Cardiovascular Institute and Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Mohit Bhide
- Cardiovascular Institute and Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Steven Yang
- Cardiovascular Institute and Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Kristina Li
- Cardiovascular Institute and Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Zolt Arany
- Cardiovascular Institute and Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| |
Collapse
|
29
|
Wang W, Yang C, Wang XY, Zhou LY, Lao GJ, Liu D, Wang C, Hu MD, Zeng TT, Yan L, Ren M. MicroRNA-129 and -335 Promote Diabetic Wound Healing by Inhibiting Sp1-Mediated MMP-9 Expression. Diabetes 2018; 67:1627-1638. [PMID: 29748291 DOI: 10.2337/db17-1238] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 05/01/2018] [Indexed: 12/20/2022]
Abstract
Diabetic wounds are recalcitrant to healing. However, the mechanism causing this dysfunction is not fully understood. High expression of matrix metalloproteinase-9 (MMP-9) is indicative of poor wound healing. In this study, we show that specificity protein-1 (Sp1), a regulator of MMP-9, binds directly to its promoter and enhances its expression. Additionally, we demonstrated that Sp1 is the direct target of two microRNAs (miRNAs), miR-129 and -335, which are significantly downregulated in diabetic skin tissues. In vitro experiments confirmed that miR-129 or -335 overexpression inhibits MMP-9 promoter activity and protein expression by targeting Sp1, whereas the inhibition of these miRNAs has the opposite effect. The beneficial role of miR-129 or miR-335 in diabetic wound healing was confirmed by the topical administration of miRNA agomirs in diabetic animals. This treatment downregulated Sp1-mediated MMP-9 expression, increased keratinocyte migration, and recovered skin thickness and collagen content. The combined treatment with miR-129 and miR-335 induced a synergistic effect on Sp1 repression and MMP-9 downregulation both in vitro and in vivo. This study demonstrates the regulatory mechanism of Sp1-mediated MMP-9 expression in diabetic wound healing and highlights the potential therapeutic benefits of miR-129 and -335 in delayed wound healing in diabetes.
Collapse
Affiliation(s)
- Wei Wang
- Department of Endocrinology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Chuan Yang
- Department of Endocrinology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
- China Diabetes-Related Chronic Wound Treatment Training Center, Guangzhou, People's Republic of China
| | - Xiao Yi Wang
- Department of Endocrinology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Li Yan Zhou
- Department of Endocrinology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Guo Juan Lao
- Department of Endocrinology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
- Center for Cancer and Stem Cell Biology, Institute of Biosciences and Technology, Texas A&M Health Science Center, Houston, TX
| | - Dan Liu
- Department of Endocrinology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
- China Diabetes-Related Chronic Wound Treatment Training Center, Guangzhou, People's Republic of China
| | - Chuan Wang
- Department of Endocrinology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
- China Diabetes-Related Chronic Wound Treatment Training Center, Guangzhou, People's Republic of China
| | - Meng Die Hu
- Department of Endocrinology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Ting Ting Zeng
- Department of Endocrinology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Li Yan
- Department of Endocrinology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
- China Diabetes-Related Chronic Wound Treatment Training Center, Guangzhou, People's Republic of China
| | - Meng Ren
- Department of Endocrinology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
- China Diabetes-Related Chronic Wound Treatment Training Center, Guangzhou, People's Republic of China
| |
Collapse
|
30
|
Jeanne Dit Fouque K, Salgueiro LM, Cai R, Sha W, Schally AV, Fernandez-Lima F. Structural Motif Descriptors as a Way To Elucidate the Agonistic or Antagonistic Activity of Growth Hormone-Releasing Hormone Peptide Analogues. ACS OMEGA 2018; 3:7432-7440. [PMID: 31458901 PMCID: PMC6644384 DOI: 10.1021/acsomega.8b00375] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 06/21/2018] [Indexed: 05/05/2023]
Abstract
The synthesis of analogues of hypothalamic neuropeptide growth hormone-releasing hormone (GHRH) is an efficient strategy for designing new therapeutic agents. Several promising synthetic agonist and antagonist analogues of GHRH have been developed based on amino acid mutations of the GHRH (1-29) sequence. Because structural information on the activity of the GHRH agonists or antagonists is limited, there is a need for more effective analytical workflows capable of correlating the peptide sequence with biological activity. In the present work, three GHRH agonists-MR-356, MR-406, and MR-409-and three GHRH antagonists-MIA-602, MIA-606, and MIA-690-were investigated to assess the role of substitutions in the amino acid sequence on structural motifs and receptor binding affinities. The use of high resolution trapped ion mobility spectrometry coupled to mass spectrometry allowed the observation of a large number of peptide-specific mobility bands (or structural motif descriptors) as a function of the amino acid sequence and the starting solution environment. A direct correlation was observed between the amino acid substitutions (i.e., basic residues and d/l-amino acids), the structural motif descriptors, and the biological function (i.e., receptor binding affinities of the GHRH agonists and antagonists). The simplicity, ease, and high throughput of the proposed workflow based on the structural motif descriptors can significantly reduce the cost and time during screening of new synthetic peptide analogues.
Collapse
Affiliation(s)
- Kevin Jeanne Dit Fouque
- Department
of Chemistry and Biochemistry, Florida International
University, 11200 SW 8th Street, AHC4-233, Miami, Florida 33199, United States
| | - Luis M. Salgueiro
- Veterans
Affairs Medical Center, 1201 NW 16th Street, Research Service (151), Room
2A103C, Miami, Florida 33125, United States
- Departments
of Pathology and Medicine, Divisions of Hematology/Oncology and Endocrinology,
Miller School of Medicine, University of
Miami, 1600 NW 10th Avenue
#1140, Miami, Florida 33136, United States
| | - Renzhi Cai
- Veterans
Affairs Medical Center, 1201 NW 16th Street, Research Service (151), Room
2A103C, Miami, Florida 33125, United States
- Departments
of Pathology and Medicine, Divisions of Hematology/Oncology and Endocrinology,
Miller School of Medicine, University of
Miami, 1600 NW 10th Avenue
#1140, Miami, Florida 33136, United States
| | - Wei Sha
- Veterans
Affairs Medical Center, 1201 NW 16th Street, Research Service (151), Room
2A103C, Miami, Florida 33125, United States
- Departments
of Pathology and Medicine, Divisions of Hematology/Oncology and Endocrinology,
Miller School of Medicine, University of
Miami, 1600 NW 10th Avenue
#1140, Miami, Florida 33136, United States
| | - Andrew V. Schally
- Veterans
Affairs Medical Center, 1201 NW 16th Street, Research Service (151), Room
2A103C, Miami, Florida 33125, United States
- Departments
of Pathology and Medicine, Divisions of Hematology/Oncology and Endocrinology,
Miller School of Medicine, University of
Miami, 1600 NW 10th Avenue
#1140, Miami, Florida 33136, United States
| | - Francisco Fernandez-Lima
- Department
of Chemistry and Biochemistry, Florida International
University, 11200 SW 8th Street, AHC4-233, Miami, Florida 33199, United States
- Biomolecular
Sciences Institute, Florida International
University, 11200 SW 8th Street, AHC4-211, Miami, Florida 33199, United States
- E-mail:
| |
Collapse
|
31
|
Oikawa S, Wada S, Lee M, Maeda S, Akimoto T. Role of endothelial microRNA-23 clusters in angiogenesis in vivo. Am J Physiol Heart Circ Physiol 2018; 315:H838-H846. [PMID: 29906231 DOI: 10.1152/ajpheart.00742.2017] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The capillary network is distributed throughout the body, and its reconstruction is induced under various pathophysiological conditions. MicroRNAs are small noncoding RNAs that regulate gene expression via posttranscriptional mechanisms and are involved in many biological functions, including angiogenesis. Previous studies have shown that each microRNA of miR-23 clusters, composed of the miR-23a cluster (miR-23a~27a~24-2) and miR-23b cluster (miR-23b~27b~24-1), regulates angiogenesis in vitro. However, the role of miR-23 clusters, located within a single transcription unit, in angiogenesis in vivo has not been elucidated. In the present study, we generated vascular endothelial cell (EC)-specific miR-23 cluster double-knockout (DKO) mice and demonstrated sprouting angiogenesis under various conditions, including voluntary running exercise, hindlimb ischemia, skin wound healing, and EC sprouting from aorta explants. Here, we demonstrated that EC-specific miR-23 DKO mice are viable and fertile, with no gross abnormalities observed in pups or adults. The capillary number was normally increased in the muscles of these DKO mice in response to 2 wk of voluntary running and hindlimb ischemia. Furthermore, we did not observe any abnormalities in skin wound closure or EC sprouting from aortic ring explants in EC-specific miR-23 cluster DKO mice. Our results suggest that endothelial miR-23 clusters are dispensable for embryonic development and postnatal angiogenesis in vivo. NEW & NOTEWORTHY We generated vascular endothelial cell (EC)-specific miR-23a/b cluster double-knockout mice and determined sprouting angiogenesis under various conditions, including voluntary running exercise, hindlimb ischemia, skin wound healing, and EC sprouting from aorta explants. We demonstrated that the double-knockout mice were viable and fertile, with no gross abnormalities in exercise- and ischemia-induced angiogenesis and skin wound closure or EC sprouting from aortic ring explants.
Collapse
Affiliation(s)
- Satoshi Oikawa
- Graduate School of Comprehensive Human Science, University of Tsukuba , Ibaraki , Japan
| | - Shogo Wada
- Division of Regenerative Medical Engineering, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo , Tokyo , Japan
| | - Minjung Lee
- Division of Regenerative Medical Engineering, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo , Tokyo , Japan
| | - Seiji Maeda
- Faculty of Health and Sport Sciences, University of Tsukuba , Ibaraki , Japan
| | - Takayuki Akimoto
- Division of Regenerative Medical Engineering, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo , Tokyo , Japan.,Laboratory of Muscle Biology, Faculty of Sport Sciences, Waseda University , Saitama , Japan
| |
Collapse
|
32
|
Cui T, Jimenez JJ, Block NL, Badiavas EV, Rodriguez-Menocal L, Vila Granda A, Cai R, Sha W, Zarandi M, Perez R, Schally AV. Agonistic analogs of growth hormone releasing hormone (GHRH) promote wound healing by stimulating the proliferation and survival of human dermal fibroblasts through ERK and AKT pathways. Oncotarget 2018; 7:52661-52672. [PMID: 27494841 PMCID: PMC5288139 DOI: 10.18632/oncotarget.11024] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 07/23/2016] [Indexed: 12/22/2022] Open
Abstract
Decreased or impaired proliferation capability of dermal fibroblasts interferes with successful wound healing. Several growth factors tested failed to fully restore the growth of fibroblasts, possibly due to their rapid degradation by proteases. It is therefore critical to find new agents which have stimulatory effects on fibroblasts while being highly resistant to degradation. In such a scenario, the activities of two agonistic analogs of growth hormone releasing hormone (GHRH), MR-409 and MR-502, were evaluated for their impact on proliferation and survival of primary human dermal fibroblasts. In vitro, both analogs significantly stimulated cell growth by more than 50%. Under serum-depletion induced stress, fibroblasts treated with MR-409 or MR-502 demonstrated better survival rates than control. These effects can be inhibited by either PD98059 or wortmannin. Signaling through MEK/ERK1/2 and PI3K/AKT in an IGF-1 receptor-independent manner is required. In vivo, MR-409 promoted wound closure. Animals treated topically with MR-409 healed earlier than controls in a dose-dependent manner. Histologic examination revealed better wound contraction and less fibrosis in treated groups. In conclusion, MR-409 is a potent mitogenic and anti-apoptotic factor for primary human dermal fibroblasts. Its beneficial effects on wound healing make it a promising agent for future development.
Collapse
Affiliation(s)
- Tengjiao Cui
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, USA.,South Florida VA Foundation for Research and Education, Veterans Affairs Medical Center, Miami, FL, USA.,Division of Endocrinology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Joaquin J Jimenez
- Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.,Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Norman L Block
- Department of Pathology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Evangelos V Badiavas
- Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.,Department of Medicine, Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Luis Rodriguez-Menocal
- Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.,Department of Medicine, Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Ailin Vila Granda
- Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Renzhi Cai
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, USA.,South Florida VA Foundation for Research and Education, Veterans Affairs Medical Center, Miami, FL, USA.,Division of Endocrinology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Wei Sha
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, USA.,South Florida VA Foundation for Research and Education, Veterans Affairs Medical Center, Miami, FL, USA.,Department of Medicine, Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Marta Zarandi
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, USA.,South Florida VA Foundation for Research and Education, Veterans Affairs Medical Center, Miami, FL, USA
| | - Roberto Perez
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, USA.,South Florida VA Foundation for Research and Education, Veterans Affairs Medical Center, Miami, FL, USA
| | - Andrew V Schally
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, USA.,South Florida VA Foundation for Research and Education, Veterans Affairs Medical Center, Miami, FL, USA.,Department of Pathology, University of Miami Miller School of Medicine, Miami, FL, USA.,Division of Hematology/Oncology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, USA.,Division of Endocrinology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, USA.,Department of Medicine, Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL, USA.,Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA
| |
Collapse
|
33
|
Górnikiewicz B, Ronowicz A, Madanecki P, Sachadyn P. Genome-wide DNA methylation profiling of the regenerative MRL/MpJ mouse and two normal strains. Epigenomics 2017; 9:1105-1122. [DOI: 10.2217/epi-2017-0009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Aim: We aimed to identify the pivotal differences in the DNA methylation profiles between the regeneration capable MRL/MpJ mouse and reference mouse strains. Materials & methods: Global DNA methylation profiling was performed in ear pinnae, bone marrow, spleen, liver and heart from uninjured adult females of the MRL/MpJ and C57BL/6J and BALB/c. Results & conclusion: A number of differentially methylated regions (DMRs) distinguishing between the MRL/MpJ mouse and both references were identified. In the ear pinnae, the DMRs were enriched in genes associated with development, inflammation and apoptosis, and in binding sites of transcriptional modulator Smad1. Several DMRs overlapped previously mapped quantitative trait loci of regenerative capability. The results suggest potential epigenetic determinants of regenerative phenomenon.
Collapse
Affiliation(s)
- Bartosz Górnikiewicz
- Department of Molecular Biotechnology & Microbiology, Gdańsk University of Technology, Gdańsk, Poland
| | - Anna Ronowicz
- Department of Biology & Pharmaceutical Botany of Medical University of Gdańsk, Gdańsk, Poland
| | - Piotr Madanecki
- Department of Biology & Pharmaceutical Botany of Medical University of Gdańsk, Gdańsk, Poland
| | - Paweł Sachadyn
- Department of Molecular Biotechnology & Microbiology, Gdańsk University of Technology, Gdańsk, Poland
| |
Collapse
|
34
|
Messias de Lima CF, Dos Santos Reis MD, da Silva Ramos FW, Ayres-Martins S, Smaniotto S. Growth hormone modulates in vitro endothelial cell migration and formation of capillary-like structures. Cell Biol Int 2017; 41:577-584. [PMID: 28205281 DOI: 10.1002/cbin.10747] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 02/13/2017] [Indexed: 12/21/2022]
Abstract
The generation of new blood vessels is a complex process mediated by a variety of growth factors, and the growth hormone (GH) has been shown to act as a proangiogenic factor. In fact, human GH deficiency or excess are associated with endothelial dysfunction. Moreover, mouse models have revealed the action of GH in both tissue repair and in the microvascular circulation of normal tissues. In this study, we investigated the in vitro effects of GH on endothelial cells. Using a murine endothelioma cell line (tEnd.1), we demonstrated that GH has a mitogenic effect. The hormone also affected the endothelial cellular morphology and augmented the deposition of the extracellular matrix molecules, laminin, and fibronectin, on tEnd.1 surface. GH could stimulate tEnd.1 cell fugetaxis, in transwell chambers migration assay, and increased the formation of capillary-like structures in Matrigel®-coated plates. Given the important role of angiogenesis during tissue injury, for example, at ischemic lesions, these findings shed light on therapeutic angiogenesis, particularly in pathologies where the cardiovascular system has been compromised.
Collapse
Affiliation(s)
- Cícero Fagner Messias de Lima
- Laboratory of Cell Biology, Institute of Biology and Health Science, Federal University of Alagoas, Maceió, Alagoas, Brazil
| | - Maria Danielma Dos Santos Reis
- Laboratory of Cell Biology, Institute of Biology and Health Science, Federal University of Alagoas, Maceió, Alagoas, Brazil
| | | | - Silvana Ayres-Martins
- Laboratory of Cell Biology, Institute of Biology and Health Science, Federal University of Alagoas, Maceió, Alagoas, Brazil
| | - Salete Smaniotto
- Laboratory of Cell Biology, Institute of Biology and Health Science, Federal University of Alagoas, Maceió, Alagoas, Brazil
| |
Collapse
|
35
|
Xiao J, Chen S, Yi J, Zhang H, Ameer GA. A Cooperative Copper Metal-Organic Framework-Hydrogel System Improves Wound Healing in Diabetes. ADVANCED FUNCTIONAL MATERIALS 2017; 27:1604872. [PMID: 28729818 PMCID: PMC5513192 DOI: 10.1002/adfm.201604872] [Citation(s) in RCA: 213] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Chronic non-healing wounds remain a major clinical challenge that would benefit from the development of advanced, regenerative dressings that promote wound closure within a clinically relevant time frame. The use of copper ions has shown promise in wound healing applications possibly by promoting angiogenesis. However, reported treatments that use copper ions require multiple applications of copper salts or oxides to the wound bed, exposing the patient to potentially toxic levels of copper ions and resulting in variable outcomes. Herein we set out to assess whether copper metal organic framework nanoparticles (HKUST-1 NPs) embedded within an antioxidant thermoresponsive citrate-based hydrogel would decrease copper ion toxicity and accelerate wound healing in diabetic mice. HKUST-1 and poly-(polyethyleneglycol citrate-co-N-isopropylacrylamide) (PPCN) were synthesized and characterized. HKUST-1 NP stability in a protein solution with and without embedding them in PPCN hydrogel was determined. Copper ion release, cytotoxicity, apoptosis, and in vitro migration processes were measured. Wound closure rates and wound blood perfusion were assessed in vivo using the splinted excisional dermal wound diabetic mouse model. HKUST-1 NP disintegrated in protein solution while HKUST-1 NPs embedded in PPCN (H-HKUST-1) were protected from degradation and copper ions were slowly released. Cytotoxicity and apoptosis due to copper ion release were significantly reduced while dermal cell migration in vitro and wound closure rates in vivo were significantly enhanced. In vivo, H-HKUST-1 induced angiogenesis, collagen deposition, and re-epithelialization during wound healing in diabetic mice. These results suggest that a cooperatively stabilized, copper ion-releasing H-HKUST-1 hydrogel is a promising innovative dressing for the treatment of chronic wounds.
Collapse
Affiliation(s)
- Jisheng Xiao
- Biomedical Engineering Department, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
| | - Siyu Chen
- Biomedical Engineering Department, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
| | - Ji Yi
- Biomedical Engineering Department, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
| | - Hao Zhang
- Biomedical Engineering Department, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, 60208
| | - Guillermo A. Ameer
- Biomedical Engineering Department, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
- Department of Surgery, Feinberg School of Medicine, Chicago, Illinois 60611, United States
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, 60208
- Simpson Querrey Institute, Northwestern University, Chicago, IL, 60611
- Corresponding Author:
| |
Collapse
|
36
|
Growth Hormone-Releasing Hormone and Its Analogues: Significance for MSCs-Mediated Angiogenesis. Stem Cells Int 2016; 2016:8737589. [PMID: 27774107 PMCID: PMC5059609 DOI: 10.1155/2016/8737589] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 06/19/2016] [Accepted: 07/03/2016] [Indexed: 02/08/2023] Open
Abstract
Mesenchymal stromal cells (MSCs) are promising candidates for regenerative medicine because of their multipotency, immune-privilege, and paracrine properties including the potential to promote angiogenesis. Accumulating evidence suggests that the inherent properties of cytoprotection and tissue repair by native MSCs can be enhanced by various preconditioning stimuli implemented prior to cell transplantation. Growth hormone-releasing hormone (GHRH), a stimulator in extrahypothalamus systems including tumors, has attracted great attentions in recent years because GHRH and its agonists could promote angiogenesis in various tissues. GHRH and its agonists are proangiogenic in responsive tissues including tumors, and GHRH antagonists have been tested as antitumor agents through their ability to suppress angiogenesis and cell growth. GHRH-R is expressed by MSCs and evolving work from our laboratory indicates that treatment of MSCs with GHRH agonists prior to cell transplantation markedly enhanced the angiogenic potential and tissue reparative properties of MSCs through a STAT3 signaling pathway. In this review we summarized the possible effects of GHRH analogues on cell growth and development, as well as on the proangiogenic properties of MSCs. We also discussed the relationship between GHRH analogues and MSC-mediated angiogenesis. The analyses provide new insights into molecular pathways of MSCs-based therapies and their augmentation by GHRH analogues.
Collapse
|
37
|
Granata R. Peripheral activities of growth hormone-releasing hormone. J Endocrinol Invest 2016; 39:721-7. [PMID: 26891937 DOI: 10.1007/s40618-016-0440-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 02/03/2016] [Indexed: 12/21/2022]
Abstract
Growth hormone (GH)-releasing hormone (GHRH) is produced by the hypothalamus and stimulates GH synthesis and release in the anterior pituitary gland. In addition to its endocrine role, GHRH exerts a wide range of extrapituitary effects which include stimulation of cell proliferation, survival and differentiation, and inhibition of apoptosis. Accordingly, expression of GHRH, as well as the receptor GHRH-R and its splice variants, has been demonstrated in different peripheral tissues and cell types. Among the direct peripheral activities, GHRH regulates pancreatic islet and β-cell survival and function and endometrial cell proliferation, promotes cardioprotection and wound healing, influences the immune and reproductive systems, reduces inflammation, indirectly increases lifespan and adiposity and acts on skeletal muscle cells to inhibit cell death and atrophy. Therefore, it is becoming increasingly clear that GHRH exerts important extrapituitary functions, suggesting potential therapeutic use of the peptide and its analogs in a wide range of medical settings.
Collapse
Affiliation(s)
- R Granata
- Lab of Molecular and Cellular Endocrinology, Division of Endocrinology, Diabetes and Metabolism, Department of Medical Sciences, University of Torino, Corso Dogliotti, 14, 10126, Turin, Italy.
| |
Collapse
|
38
|
Teran E, Chesner J, Rapaport R. Growth and growth hormone: An overview. Growth Horm IGF Res 2016; 28:3-5. [PMID: 26936284 DOI: 10.1016/j.ghir.2016.02.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 02/11/2016] [Accepted: 02/21/2016] [Indexed: 11/24/2022]
Abstract
Growth is a good indicator of a child's health. Growth disturbances, including short stature or growth failure, could be indications of illnesses such as chronic disease, nutritional deficits, celiac disease or hormonal abnormalities. Therefore, a careful assessment of the various requirements for normal growth needs to be done by history, physical examination, and screening laboratory tests. More details will be reviewed about the GH-IGF axis, its abnormalities with special emphasis on GH deficiency, its diagnosis and treatment. GH treatment indications in the US will be reviewed and a few only will be highlighted. They will include GH deficiency, as well as the treatment of children born SGA, including the results of a US study using FDA approved dose of 0.48mg/kg/week. GH deficiency in adults will also be briefly reviewed. Treatment of patients with SHOX deficiency will also be discussed. Possible side effects of GH treatment and the importance of monitoring safety will be highlighted.
Collapse
Affiliation(s)
- Enrique Teran
- Colegio de Ciencias de la Salud, Universidad San Francisco de Quito, Quito, Ecuador
| | - Jaclyn Chesner
- Division of Pediatric Endocrinology and Diabetes, Icahn School of Medicine at Mount Sina, 1 Gustave L. Levy Place, NY, USA
| | - Robert Rapaport
- Division of Pediatric Endocrinology and Diabetes, Icahn School of Medicine at Mount Sina, 1 Gustave L. Levy Place, NY, USA
| |
Collapse
|
39
|
Kanashiro-Takeuchi RM, Szalontay L, Schally AV, Takeuchi LM, Popovics P, Jaszberenyi M, Vidaurre I, Zarandi M, Cai RZ, Block NL, Hare JM, Rick FG. New therapeutic approach to heart failure due to myocardial infarction based on targeting growth hormone-releasing hormone receptor. Oncotarget 2016; 6:9728-39. [PMID: 25797248 PMCID: PMC4496393 DOI: 10.18632/oncotarget.3303] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 02/08/2015] [Indexed: 12/21/2022] Open
Abstract
Background We previously showed that growth hormone-releasing hormone (GHRH) agonists are cardioprotective following myocardial infarction (MI). Here, our aim was to evaluate the in vitro and in vivo activities of highly potent new GHRH agonists, and elucidate their mechanisms of action in promoting cardiac repair. Methods and Results H9c2 cells were cultured in serum-free medium, mimicking nutritional deprivation. GHRH agonists decreased calcium influx and significantly improved cell survival. Rats with cardiac infarction were treated with GHRH agonists or placebo for four weeks. MI size was reduced by selected GHRH agonists (JI-38, MR-356, MR-409); this accompanied an increased number of cardiac c-kit+ cells, cellular mitotic divisions, and vascular density. One week post-MI, MR-409 significantly reduced plasma levels of IL-2, IL-6, IL-10 and TNF-α compared to placebo. Gene expression studies revealed favorable outcomes of MR-409 treatment partially result from inhibitory activity on pro-apoptotic molecules and pro-fibrotic systems, and by elevation of bone morphogenetic proteins. Conclusions Treatment with GHRH agonists appears to reduce the inflammatory responses post-MI and may consequently improve mechanisms of healing and cardiac remod eling by regulating pathways involved in fibrosis, apoptosis and cardiac repair. Patients with cardiac dysfunction could benefit from treatment with novel GHRH agonists.
Collapse
Affiliation(s)
- Rosemeire M Kanashiro-Takeuchi
- Interdisciplinary Stem Cell Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Department of Molecular and Cellular Pharmacology, University of Miami, Miller School of Medicine, Florida, United States of America
| | - Luca Szalontay
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America
| | - Andrew V Schally
- Interdisciplinary Stem Cell Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America.,Department of Pathology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Department of Medicine, Divisions of Hematology/Oncology and Endocrinology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Sylvester Comprehensive Cancer Center, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Lauro M Takeuchi
- Interdisciplinary Stem Cell Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Petra Popovics
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America.,Department of Medicine III, Medical Faculty Carl Gustav Carus, TU Dresden, Germany.,Department of Medicine, Division of Cardiology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Miklos Jaszberenyi
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America.,Department of Pathology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Irving Vidaurre
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America
| | - Marta Zarandi
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America
| | - Ren-Zhi Cai
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America.,Department of Pathology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Norman L Block
- Interdisciplinary Stem Cell Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America.,Department of Pathology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Department of Medicine, Divisions of Hematology/Oncology and Endocrinology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Sylvester Comprehensive Cancer Center, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Joshua M Hare
- Interdisciplinary Stem Cell Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Department of Medicine, Division of Cardiology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Ferenc G Rick
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America.,Department of Urology, Herbert Wertheim College of Medicine, Florida International University, Miami, Florida, United States of America
| |
Collapse
|
40
|
Ma Q, Xia X, Tao Q, Lu K, Shen J, Xu Q, Hu X, Tang Y, Block NL, Webster KA, Schally AV, Wang J, Yu H. Profound Actions of an Agonist of Growth Hormone-Releasing Hormone on Angiogenic Therapy by Mesenchymal Stem Cells. Arterioscler Thromb Vasc Biol 2016; 36:663-672. [PMID: 26868211 DOI: 10.1161/atvbaha.116.307126] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Accepted: 01/21/2016] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The efficiency of cell therapy is limited by poor cell survival and engraftment. Here, we studied the effect of the growth hormone-releasing hormone agonist, JI-34, on mesenchymal stem cell (MSC) survival and angiogenic therapy in a mouse model of critical limb ischemia. APPROACH AND RESULTS Mouse bone marrow-derived MSCs were incubated with or without 10(-8) mol/L JI-34 for 24 hours. MSCs were then exposed to hypoxia and serum deprivation to detect the effect of preconditioning on cell apoptosis, migration, and tube formation. For in vivo tests, critical limb ischemia was induced by femoral artery ligation. After surgery, mice received 50 μL phosphate-buffered saline or with 1×10(6) MSCs or with 1×10(6) JI-34-reconditioned MSCs. Treatment of MSCs with JI-34 improved MSC viability and mobility and markedly enhanced their capability to promote endothelial tube formation in vitro. These effects were paralleled by an increased phosphorylation and nuclear translocation of signal transducer and activator of transcription 3. In vivo, JI-34 pretreatment enhanced the engraftment of MSCs into ischemic hindlimb muscles and augmented reperfusion and limb salvage compared with untreated MSCs. Significantly more vasculature and proliferating CD31(+) and CD34(+) cells were detected in ischemic muscles that received MSCs treated with JI-34. CONCLUSIONS Our studies demonstrate a novel role for JI-34 to markedly improve therapeutic angiogenesis in hindlimb ischemia by increasing the viability and mobility of MSCs. These findings support additional studies to explore the full potential of growth hormone-releasing hormone agonists to augment cell therapy in the management of ischemia.
Collapse
MESH Headings
- Active Transport, Cell Nucleus
- Animals
- Antigens, CD34/metabolism
- Apoptosis/drug effects
- Cell Movement/drug effects
- Cell Proliferation/drug effects
- Cell Survival/drug effects
- Cells, Cultured
- Disease Models, Animal
- Dose-Response Relationship, Drug
- Female
- Growth Hormone-Releasing Hormone/agonists
- Growth Hormone-Releasing Hormone/analogs & derivatives
- Growth Hormone-Releasing Hormone/metabolism
- Growth Hormone-Releasing Hormone/pharmacology
- Hindlimb
- Ischemia/metabolism
- Ischemia/physiopathology
- Ischemia/therapy
- Male
- Mesenchymal Stem Cell Transplantation
- Mesenchymal Stem Cells/drug effects
- Mesenchymal Stem Cells/metabolism
- Mice, Inbred C57BL
- Muscle, Skeletal/blood supply
- Neovascularization, Physiologic
- Peptide Fragments/pharmacology
- Phosphorylation
- Platelet Endothelial Cell Adhesion Molecule-1/metabolism
- Receptors, Neuropeptide/agonists
- Receptors, Neuropeptide/metabolism
- Receptors, Pituitary Hormone-Regulating Hormone/agonists
- Receptors, Pituitary Hormone-Regulating Hormone/metabolism
- STAT3 Transcription Factor/metabolism
- Time Factors
Collapse
|
41
|
Role of growth hormone-releasing hormone in dyslipidemia associated with experimental type 1 diabetes. Proc Natl Acad Sci U S A 2016; 113:1895-900. [PMID: 26831066 DOI: 10.1073/pnas.1525520113] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Dyslipidemia associated with triglyceride-rich lipoproteins (TRLs) represents an important residual risk factor for cardiovascular and chronic kidney disease in patients with type 1 diabetes (T1D). Levels of growth hormone (GH) are elevated in T1D, which aggravates both hyperglycemia and dyslipidemia. The hypothalamic growth hormone-releasing hormone (GHRH) regulates the release of GH by the pituitary but also exerts separate actions on peripheral GHRH receptors, the functional role of which remains elusive in T1D. In a rat model of streptozotocin (STZ)-induced T1D, GHRH receptor expression was found to be up-regulated in the distal small intestine, a tissue involved in chylomicron synthesis. Treatment of T1D rats with a GHRH antagonist, MIA-602, at a dose that did not affect plasma GH levels, significantly reduced TRL, as well as markers of renal injury, and improved endothelial-dependent vasorelaxation. Glucagon-like peptide 1 (GLP-1) reduces hyperglucagonemia and postprandial TRL, the latter in part through a decreased synthesis of apolipoprotein B-48 (ApoB-48) by intestinal cells. Although plasma GLP-1 levels were elevated in diabetic animals, this was accompanied by increased rather than reduced glucagon levels, suggesting impaired GLP-1 signaling. Treatment with MIA-602 normalized GLP-1 and glucagon to control levels in T1D rats. MIA-602 also decreased secretion of ApoB-48 from rat intestinal epithelial cells in response to oleic acid stimulation in vitro, in part through a GLP-1-dependent mechanism. Our findings support the hypothesis that antagonizing the signaling of GHRH in T1D may improve GLP-1 function in the small intestine, which, in turn, diminishes TRL and reduces renal and vascular complications.
Collapse
|
42
|
Liao XJ, Li L, Zhang ZY, Long Y, Yang B, Ruan GR, Su Y, Ai HS, Zhang WC, Deng WY, Xiao SJ, Ren J, Ding NS, Huang LS. Susceptibility loci for umbilical hernia in swine detected by genome-wide association. RUSS J GENET+ 2015. [DOI: 10.1134/s1022795415100105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
43
|
Beneficial effects of growth hormone-releasing hormone agonists on rat INS-1 cells and on streptozotocin-induced NOD/SCID mice. Proc Natl Acad Sci U S A 2015; 112:13651-6. [PMID: 26474831 DOI: 10.1073/pnas.1518540112] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Agonists of growth hormone-releasing hormone (GHRH) have been previously reported to promote growth, function, and engraftment of islet cells following transplantation. Here we evaluated recently synthesized GHRH agonists on the proliferation and biological functions of rat pancreatic β-cell line (INS-1) and islets. In vitro treatment of INS-1 cells with GHRH agonists increased cell proliferation, the expression of cellular insulin, insulin-like growth factor-1 (IGF1), and GHRH receptor, and also stimulated insulin secretion in response to glucose challenge. Exposure of INS-1 cells to GHRH agonists, MR-356 and MR-409, induced activation of ERK and AKT pathways. Agonist MR-409 also significantly increased the levels of cellular cAMP and the phosphorylation of cAMP response element binding protein (CREB) in INS-1 cells. Treatment of rat islets with agonist, MR-409 significantly increased cell proliferation, islet size, and the expression of insulin. In vivo daily s.c. administration of 10 μg MR-409 for 3 wk dramatically reduced the severity of streptozotocin (STZ)-induced diabetes in nonobese diabetic severe combined immunodeficiency (NOD/SCID) mice. The maximal therapeutic benefits with respect to the efficiency of engraftment, ability to reach normoglycemia, gain in body weight, response to high glucose challenge, and induction of higher levels of serum insulin and IGF1 were observed when diabetic mice were transplanted with rat islets preconditioned with GHRH agonist, MR-409, and received additional treatment with MR-409 posttransplantation. This study provides an improved approach to the therapeutic use of GHRH agonists in the treatment of diabetes mellitus.
Collapse
|
44
|
Effect of bedtime on recurrent aphthous stomatitis in college students. Oral Surg Oral Med Oral Pathol Oral Radiol 2015; 119:196-201. [DOI: 10.1016/j.oooo.2014.10.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 10/09/2014] [Accepted: 10/18/2014] [Indexed: 11/22/2022]
|
45
|
Antagonist of GH-releasing hormone receptors alleviates experimental ocular inflammation. Proc Natl Acad Sci U S A 2014; 111:18303-8. [PMID: 25489106 DOI: 10.1073/pnas.1421815112] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Disruptions in immunity and occurrence of inflammation cause many eye diseases. The growth hormone-releasing hormone-growth hormone-insulin-like growth factor-1 (GHRH-GH-IGF1) axis exerts regulatory effects on the immune system. Its involvement in ocular inflammation remains to be investigated. Here we studied this signaling in endotoxin-induced uveitis (EIU) generated by LPS. The increase in GHRH receptor (GHRH-R) protein levels was parallel to the increase in mRNA levels of pituitary-specific transcription factor-1, GHRH-R splice variant 1, GHRH, and GH following LPS insult. Elevation of GHRH-R and GH receptor was localized on the epithelium of the iris and ciliary body, and GHRH-R was confined to the infiltrating macrophages and leukocytes in aqueous humor but not to those in stroma. Treatment with GHRH-R antagonist decreased LPS-stimulated surges of GH and IGF1 in aqueous humor and alleviated inflammation by reducing the infiltration of macrophages and leukocytes and the production of TNF-α, IL-1β, and monocyte chemotactic protein-1. Our results indicate that inflammation in the iris and ciliary body involves the activation of GHRH signaling, which affects the recruitment of immune cells and the production of proinflammatory mediators that contribute to EIU pathogenesis. Moreover, the results suggest that GHRH-R antagonists are potential therapeutic agents for the treatment of acute ocular inflammation.
Collapse
|
46
|
Kiaris H, Block NL, Papavassiliou AG, Schally AV. GHRH and wound healing. Commun Integr Biol 2014. [DOI: 10.4161/cib.14002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
|
47
|
Endothelial PGC-1α mediates vascular dysfunction in diabetes. Cell Metab 2014; 19:246-58. [PMID: 24506866 PMCID: PMC4040246 DOI: 10.1016/j.cmet.2013.12.014] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2013] [Revised: 10/08/2013] [Accepted: 12/10/2013] [Indexed: 12/26/2022]
Abstract
Endothelial dysfunction is a central hallmark of diabetes. The transcriptional coactivator PGC-1α is a powerful regulator of metabolism, but its role in endothelial cells remains poorly understood. We show here that endothelial PGC-1α expression is high in diabetic rodents and humans and that PGC-1α powerfully blocks endothelial migration in cell culture and vasculogenesis in vivo. Mechanistically, PGC-1α induces Notch signaling, blunts activation of Rac/Akt/eNOS signaling, and renders endothelial cells unresponsive to established angiogenic factors. Transgenic overexpression of PGC-1α in the endothelium mimics multiple diabetic phenotypes, including aberrant re-endothelialization after carotid injury, blunted wound healing, and reduced blood flow recovery after hindlimb ischemia. Conversely, deletion of endothelial PGC-1α rescues the blunted wound healing and recovery from hindlimb ischemia seen in type 1 and type 2 diabetes. Endothelial PGC-1α thus potently inhibits endothelial function and angiogenesis, and induction of endothelial PGC-1α contributes to multiple aspects of vascular dysfunction in diabetes.
Collapse
|
48
|
Cai R, Schally AV, Cui T, Szalontay L, Halmos G, Sha W, Kovacs M, Jaszberenyi M, He J, Rick FG, Popovics P, Kanashiro-Takeuchi R, Hare JM, Block NL, Zarandi M. Synthesis of new potent agonistic analogs of growth hormone-releasing hormone (GHRH) and evaluation of their endocrine and cardiac activities. Peptides 2014; 52:104-12. [PMID: 24373935 PMCID: PMC4745889 DOI: 10.1016/j.peptides.2013.12.010] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Revised: 12/17/2013] [Accepted: 12/18/2013] [Indexed: 11/30/2022]
Abstract
In view of the recent findings of stimulatory effects of GHRH analogs, JI-34, JI-36 and JI-38, on cardiomyocytes, pancreatic islets and wound healing, three series of new analogs of GHRH(1-29) have been synthesized and evaluated biologically in an endeavor to produce more potent compounds. "Agmatine analogs", MR-356 (N-Me-Tyr(1)-JI-38), MR-361(N-Me-Tyr(1), D-Ala(2)-JI-38) and MR-367(N-Me-Tyr(1), D-Ala(2), Asn(8)-JI-38), in which Dat in JI-38 is replaced by N-Me-Tyr(1), showed improved relative potencies on GH release upon subcutaneous administration in vivo and binding in vitro. Modification with N-Me-Tyr(1) and Arg(29)-NHCH3 as in MR-403 (N-Me-Tyr(1), D-Ala(2), Arg(29)-NHCH3-JI-38), MR-406 (N-Me-Tyr(1), Arg(29)-NHCH3-JI-38) and MR-409 (N-Me-Tyr(1), D-Ala(2), Asn(8), Arg(29)-NHCH3-JI-38), and MR-410 (N-Me-Tyr(1), D-Ala(2), Thr(8), Arg(29)-NHCH3-JI-38) resulted in dramatically increased endocrine activities. These appear to be the most potent GHRH agonistic analogs so far developed. Analogs with Apa(30)-NH2 such as MR-326 (N-Me-Tyr(1), D-Ala(2), Arg(29), Apa(30)-NH2-JI-38), and with Gab(30)-NH2, as MR-502 (D-Ala(2), 5F-Phe(6), Ser(28), Arg(29),Gab(30)-NH2-JI-38) also exhibited much higher potency than JI-38 upon i.v. administration. The relationship between the GH-releasing potency and the analog structure is discussed. Fourteen GHRH agonists with the highest endocrine potencies were subjected to cardiologic tests. MR-409 and MR-356 exhibited higher potency than JI-38 in activating myocardial repair in rats with induced myocardial infarction. As the previous class of analogs, exemplified by JI-38, had shown promising results in multiple fields including cardiology, diabetes and wound healing, our new, more potent, GHRH agonists should manifest additional efficacy for possible medical applications.
Collapse
Affiliation(s)
- Renzhi Cai
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, University of Miami, Miller School of Medicine, Miami, FL, United States
| | - Andrew V Schally
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, University of Miami, Miller School of Medicine, Miami, FL, United States; Division of Hematology/Oncology, Department of Medicine, University of Miami, Miller School of Medicine, Miami, FL, United States; Division of Endocrinology, Department of Medicine, University of Miami, Miller School of Medicine, Miami, FL, United States.
| | - Tengjiao Cui
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, University of Miami, Miller School of Medicine, Miami, FL, United States
| | - Luca Szalontay
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States
| | - Gabor Halmos
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, University of Miami, Miller School of Medicine, Miami, FL, United States
| | - Wei Sha
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Interdisciplinary Stem Cell Institute, Department of Medicine, University of Miami, Miller School of Medicine, Miami, FL, United States
| | - Magdolna Kovacs
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, University of Miami, Miller School of Medicine, Miami, FL, United States
| | - Miklos Jaszberenyi
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States
| | - Jinlin He
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States
| | - Ferenc G Rick
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Urology, Florida International University, Herbert Wertheim College of Medicine, Miami, FL, United States
| | - Petra Popovics
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; Division of Cardiology, Department of Medicine, University of Miami, Miller School of Medicine, Miami, FL, United States
| | - Rosemeire Kanashiro-Takeuchi
- Interdisciplinary Stem Cell Institute, Department of Medicine, University of Miami, Miller School of Medicine, Miami, FL, United States
| | - Joshua M Hare
- Division of Cardiology, Department of Medicine, University of Miami, Miller School of Medicine, Miami, FL, United States; Interdisciplinary Stem Cell Institute, Department of Medicine, University of Miami, Miller School of Medicine, Miami, FL, United States
| | - Norman L Block
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, University of Miami, Miller School of Medicine, Miami, FL, United States; Division of Hematology/Oncology, Department of Medicine, University of Miami, Miller School of Medicine, Miami, FL, United States
| | - Marta Zarandi
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, University of Miami, Miller School of Medicine, Miami, FL, United States
| |
Collapse
|
49
|
Katsushima Y, Sato T, Yamada C, Ito M, Suzuki Y, Ogawa E, Sukegawa I, Sukegawa J, Fukunaga K, Yanagisawa T. Interaction of PICK1 with C-terminus of growth hormone-releasing hormone receptor (GHRHR) modulates trafficking and signal transduction of human GHRHR. J Pharmacol Sci 2013; 122:193-204. [PMID: 23823934 DOI: 10.1254/jphs.12287fp] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Release of growth hormone (GH) from the somatotroph is regulated by binding GH-releasing hormone (GHRH) to its cognate receptor (GHRHR), one of the members of the G protein-coupled receptor (GPCR) superfamily. Proteins bound to the carboxy (C)-terminus of GPCR have been reported to regulate intracellular trafficking and function of the receptor; however, no functionally significant protein associated with GHRHR has been reported. We have identified a protein interacting with C-kinase 1 (PICK1) as a binding partner of GHRHR. In vitro binding assay revealed the PDZ-domain of PICK1 and the last four amino acid residues of GHRHR were prerequisite for the interaction. Further, in vivo association of these proteins was confirmed. Immunostaining data of a stable cell line expressing GHRHR with or without PICK1 suggested the C-terminus of GHRHR promoted cell surface expression of GHRHR and PICK1 affected the kinetics of the cell surface expression of GHRHR. Furthermore, cAMP production assay showed the C-terminus of GHRHR is involved in the regulation of receptor activation, and the interaction of GHRHR with PICK1 may influence intensities of the signal response after ligand stimulation. Thus, the interaction of the C-terminus of GHRHR with PICK1 has a profound role in regulating the trafficking and the signaling of GHRHR. [Supplementary Figure: available only at http://dx.doi.org/10.1254/jphs.12287FP].
Collapse
Affiliation(s)
- Yuriko Katsushima
- Department of Molecular Pharmacology, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
S-nitrosoglutathione reductase (GSNOR) enhances vasculogenesis by mesenchymal stem cells. Proc Natl Acad Sci U S A 2013; 110:2834-9. [PMID: 23288904 DOI: 10.1073/pnas.1220185110] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Although nitric oxide (NO) signaling promotes differentiation and maturation of endothelial progenitor cells, its role in the differentiation of mesenchymal stem cells (MSCs) into endothelial cells remains controversial. We tested the role of NO signaling in MSCs derived from WT mice and mice homozygous for a deletion of S-nitrosoglutathione reductase (GSNOR(-/-)), a denitrosylase that regulates S-nitrosylation. GSNOR(-/-) MSCs exhibited markedly diminished capacity for vasculogenesis in an in vitro Matrigel tube-forming assay and in vivo relative to WT MSCs. This decrease was associated with down-regulation of the PDGF receptorα (PDGFRα) in GSNOR(-/-) MSCs, a receptor essential for VEGF-A action in MSCs. Pharmacologic inhibition of NO synthase with L-N(G)-nitroarginine methyl ester (L-NAME) and stimulation of growth hormone-releasing hormone receptor (GHRHR) with GHRH agonists augmented VEGF-A production and normalized tube formation in GSNOR(-/-) MSCs, whereas NO donors or PDGFR antagonist reduced tube formation ∼50% by murine and human MSCs. The antagonist also blocked the rescue of tube formation in GSNOR(-/-) MSCs by L-NAME or the GHRH agonists JI-38, MR-409, and MR-356. Therefore, GSNOR(-/-) MSCs have a deficient capacity for endothelial differentiation due to downregulation of PDGFRα related to NO/GSNOR imbalance. These findings unravel important aspects of modulation of MSCs by VEGF-A activation of the PDGFR and illustrate a paradoxical inhibitory role of S-nitrosylation signaling in MSC vasculogenesis. Accordingly, disease states characterized by NO deficiency may trigger MSC-mediated vasculogenesis. These findings have important implications for therapeutic application of GHRH agonists to ischemic disorders.
Collapse
|