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Smith-Cohn MA, Burley NB, Grossman SA. Transient Opening of the Blood-Brain Barrier by Vasoactive Peptides to Increase CNS Drug Delivery: Reality Versus Wishful Thinking? Curr Neuropharmacol 2022; 20:1383-1399. [PMID: 35100958 PMCID: PMC9881081 DOI: 10.2174/1570159x20999220131163504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 12/02/2021] [Accepted: 01/26/2022] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND The blood-brain barrier inhibits the central nervous system penetration of 98% of small molecule drugs and virtually all biologic agents, which has limited progress in treating neurologic disease. Vasoactive peptides have been shown in animal studies to transiently disrupt the blood-brain barrier and regadenoson is currently being studied in humans to determine if it can improve drug delivery to the brain. However, many other vasoactive peptides could potentially be used for this purpose. METHODS We performed a review of the literature evaluating the physiologic effects of vasoactive peptides on the vasculature of the brain and systemic organs. To assess the likelihood that a vasoactive peptide might transiently disrupt the blood-brain barrier, we devised a four-tier classification system to organize the available evidence. RESULTS We identified 32 vasoactive peptides with potential blood-brain barrier permeabilityaltering properties. To date, none of these are shown to open the blood-brain barrier in humans. Twelve vasoactive peptides increased blood-brain barrier permeability in rodents. The remaining 20 had favorable physiologic effects on blood vessels but lacked specific information on permeability changes to the blood-brain barrier. CONCLUSION Vasoactive peptides remain an understudied class of drugs with the potential to increase drug delivery and improve treatment in patients with brain tumors and other neurologic diseases. Dozens of vasoactive peptides have yet to be formally evaluated for this important clinical effect. This narrative review summarizes the available data on vasoactive peptides, highlighting agents that deserve further in vitro and in vivo investigations.
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Affiliation(s)
- Matthew A. Smith-Cohn
- Ben & Catherine Ivy Center for Advanced Brain Tumor Treatment, Swedish Neuroscience Institute, Seattle, WA, USA; ,Address correspondence to these authors at the The Ben & Catherine Ivy Center for Advanced Brain Tumor Treatment, Swedish Neuroscience Institute, Swedish Health Services, 500 17th Ave, James Tower, Suite 540, Seattle, WA 98122, USA; Tel: 206-320-2300; Fax: 206-320-8149; E-mail: , Sidney Kimmel Cancer Center, Skip Viragh Building, 201 North Broadway, 9th Floor (Mailbox #3), Baltimore, MD 21287, USA; E-mail:
| | - Nicholas B. Burley
- Department of Internal Medicine, Sinai Hospital of Baltimore, Baltimore, MD, USA;
| | - Stuart A. Grossman
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Baltimore, MD, USA,Address correspondence to these authors at the The Ben & Catherine Ivy Center for Advanced Brain Tumor Treatment, Swedish Neuroscience Institute, Swedish Health Services, 500 17th Ave, James Tower, Suite 540, Seattle, WA 98122, USA; Tel: 206-320-2300; Fax: 206-320-8149; E-mail: , Sidney Kimmel Cancer Center, Skip Viragh Building, 201 North Broadway, 9th Floor (Mailbox #3), Baltimore, MD 21287, USA; E-mail:
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Aerts-Kaya F, Ulum B, Mammadova A, Köse S, Aydin G, Korkusuz P, Uçkan-Çetinkaya D. Neurological Regulation of the Bone Marrow Niche. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1212:127-153. [PMID: 31342461 DOI: 10.1007/5584_2019_398] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The bone marrow (BM) hematopoietic niche is the microenvironment where in the adult hematopoietic stem and progenitor cells (HSPCs) are maintained and regulated. This regulation is tightly controlled through direct cell-cell interactions with mesenchymal stromal stem (MSCs) and reticular cells, adipocytes, osteoblasts and endothelial cells, through binding to extracellular matrix molecules and through signaling by cytokines and hematopoietic growth factors. These interactions provide a healthy environment and secure the maintenance of the HSPC pool, their proliferation, differentiation and migration. Recent studies have shown that innervation of the BM and interactions with the peripheral sympathetic neural system are important for maintenance of the hematopoietic niche, through direct interactions with HSCPs or via interactions with other cells of the HSPC microenvironment. Signaling through adrenergic receptors (ARs), opioid receptors (ORs), endocannabinoid receptors (CRs) on HSPCs and MSCs has been shown to play an important role in HSPC homeostasis and mobilization. In addition, a wide range of neuropeptides and neurotransmitters, such as Neuropeptide Y (NPY), Substance P (SP) and Tachykinins, as well as neurotrophins and neuropoietic growth factors have been shown to be involved in regulation of the hematopoietic niche. Here, a comprehensive overview is given of their role and interactions with important cells in the hematopoietic niche, including HSPCs and MSCs, and their effect on HSPC maintenance, regulation and mobilization.
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Affiliation(s)
- Fatima Aerts-Kaya
- Graduate School of Health Sciences, Department of Stem Cell Sciences, Hacettepe University, Ankara, Turkey. .,Center for Stem Cell Research and Development, Hacettepe University, Ankara, Turkey.
| | - Baris Ulum
- Center for Stem Cell Research and Development, Hacettepe University, Ankara, Turkey.,Faculty of Arts and Sciences, Department of Biological Sciences, Middle East Technical University, Ankara, Turkey
| | - Aynura Mammadova
- Graduate School of Health Sciences, Department of Stem Cell Sciences, Hacettepe University, Ankara, Turkey.,Center for Stem Cell Research and Development, Hacettepe University, Ankara, Turkey
| | - Sevil Köse
- Faculty of Health Sciences, Department of Medical Biology, Atilim University, Ankara, Turkey
| | - Gözde Aydin
- Graduate School of Health Sciences, Department of Stem Cell Sciences, Hacettepe University, Ankara, Turkey.,Center for Stem Cell Research and Development, Hacettepe University, Ankara, Turkey
| | - Petek Korkusuz
- Graduate School of Health Sciences, Department of Stem Cell Sciences, Hacettepe University, Ankara, Turkey.,Faculty of Medicine, Department of Histology and Embryology, Hacettepe University, Ankara, Turkey
| | - Duygu Uçkan-Çetinkaya
- Graduate School of Health Sciences, Department of Stem Cell Sciences, Hacettepe University, Ankara, Turkey.,Center for Stem Cell Research and Development, Hacettepe University, Ankara, Turkey
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Saraf R, Mahmood F, Amir R, Matyal R. Neuropeptide Y is an angiogenic factor in cardiovascular regeneration. Eur J Pharmacol 2016; 776:64-70. [PMID: 26875634 DOI: 10.1016/j.ejphar.2016.02.033] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 01/27/2016] [Accepted: 02/09/2016] [Indexed: 12/13/2022]
Abstract
In diabetic cardiomyopathy, there is altered angiogenic signaling and increased oxidative stress. As a result, anti-angiogenic and pro-inflammatory pathways are activated. These disrupt cellular metabolism and cause fibrosis and apoptosis, leading to pathological remodeling. The autonomic nervous system and neurotransmitters play an important role in angiogenesis. Therapies that promote angiogenesis may be able to relieve the pathology in these disease states. Neuropeptide Y (NPY) is the most abundantly produced and expressed neuropeptide in the central and peripheral nervous systems in mammals and plays an important role in promoting angiogenesis and cardiomyocyte remodeling. It produces effects through G-protein-coupled Y receptors that are widely distributed and also present on the myocardium. Some of these receptors are also involved in diseased states of the heart. NPY has been implicated as a potent growth factor, causing cell proliferation in multiple systems while the NPY3-36 fragment is selective in stimulating angiogenesis and cardiomyocyte remodeling. Current research is focusing on developing a drug delivery mechanism for NPY to prolong therapy without having significant systemic consequences. This could be a promising innovation in the treatment of diabetic cardiomyopathy and ischemic heart disease.
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Affiliation(s)
- Rabya Saraf
- Department of Surgery, Division of Cardiac Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
| | - Feroze Mahmood
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
| | - Rabia Amir
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
| | - Robina Matyal
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States.
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Geloso MC, Corvino V, Di Maria V, Marchese E, Michetti F. Cellular targets for neuropeptide Y-mediated control of adult neurogenesis. Front Cell Neurosci 2015; 9:85. [PMID: 25852477 PMCID: PMC4360818 DOI: 10.3389/fncel.2015.00085] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 02/23/2015] [Indexed: 12/14/2022] Open
Abstract
Neuropeptides are emerging as key regulators of stem cell niche activities in health and disease, both inside and outside the central nervous system (CNS). Among them, neuropeptide Y (NPY), one of the most abundant neuropeptides both in the nervous system and in non-neural districts, has become the focus of much attention for its involvement in a wide range of physiological and pathological conditions, including the modulation of different stem cell activities. In particular, a pro-neurogenic role of NPY has been evidenced in the neurogenic niche, where a direct effect on neural progenitors has been demonstrated, while different cellular types, including astrocytes, microglia and endothelial cells, also appear to be responsive to the peptide. The marked modulation of the NPY system during several pathological conditions that affect neurogenesis, including stress, seizures and neurodegeneration, further highlights the relevance of this peptide in the regulation of adult neurogenesis. In view of the considerable interest in understanding the mechanisms controlling neural cell fate, this review aims to summarize and discuss current data on NPY signaling in the different cellular components of the neurogenic niche in order to elucidate the complexity of the mechanisms underlying the modulatory properties of this peptide.
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Affiliation(s)
- Maria Concetta Geloso
- Institute of Anatomy and Cell Biology, Università Cattolica del Sacro Cuore Rome, Italy
| | - Valentina Corvino
- Institute of Anatomy and Cell Biology, Università Cattolica del Sacro Cuore Rome, Italy
| | - Valentina Di Maria
- Institute of Anatomy and Cell Biology, Università Cattolica del Sacro Cuore Rome, Italy
| | - Elisa Marchese
- Institute of Anatomy and Cell Biology, Università Cattolica del Sacro Cuore Rome, Italy
| | - Fabrizio Michetti
- Institute of Anatomy and Cell Biology, Università Cattolica del Sacro Cuore Rome, Italy
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Vavra AK, Havelka GE, Martinez J, Lee VR, Fu B, Jiang Q, Keefer LK, Kibbe MR. Insights into the effect of nitric oxide and its metabolites nitrite and nitrate at inhibiting neointimal hyperplasia. Nitric Oxide 2011; 25:22-30. [PMID: 21554972 DOI: 10.1016/j.niox.2011.04.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Revised: 04/22/2011] [Accepted: 04/23/2011] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Periadventitial delivery of the nitric oxide (NO) donor PROLI/NO following arterial injury effectively inhibits neointimal hyperplasia. Given the short half-life of NO release from PROLI/NO, our goal was to determine if inhibition of neointimal hyperplasia by PROLI/NO was due to NO, or its metabolites nitrite and nitrate. METHODS AND RESULTS In vitro, the NO donor DETA/NO inhibited proliferation of rat aortic vascular smooth muscle cells (RASMC), but neither nitrite nor nitrate did. In vivo, following rat carotid artery balloon injury or injury plus the molar equivalents of PROLI/NO, nitrite, or nitrate (n=8-11/group), PROLI/NO was found to provide superior inhibition of neointimal hyperplasia (82% inhibition of intimal area, and 44% inhibition of medial area, p<0.001). Only modest inhibition was noted with nitrite or nitrate (45% and 41% inhibition of intimal area, and 31% and 29% inhibition of medial area, respectively, p<0.001). No effects on blood pressure were noted with any treatment groups. In vivo, only PROLI/NO inhibited cellular proliferation and increased arterial lumen area compared to injury alone (p<0.001). However, all three treatments inhibited inflammation (p<0.001). CONCLUSIONS PROLI/NO was more effective at inhibiting neointimal hyperplasia following arterial injury than nitrite or nitrate. However, modest inhibition of neointimal hyperplasia was observed with nitrite and nitrate, likely secondary to anti-inflammatory actions. In conclusion, we have demonstrated that the efficacy of NO donors is primarily due to NO production and not its metabolites, nitrite and nitrate.
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Affiliation(s)
- Ashley K Vavra
- Division of Vascular Surgery, and Institute for BioNanotechnology in Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, United States
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Keator CS, Custer EE, Hoagland TA, Schreiber DT, Mah K, Lawson AM, Slayden OD, McCracken JA. Evidence for a potential role of neuropeptide Y in ovine corpus luteum function. Domest Anim Endocrinol 2010; 38:103-14. [PMID: 19782503 DOI: 10.1016/j.domaniend.2009.08.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Revised: 08/06/2009] [Accepted: 08/07/2009] [Indexed: 11/25/2022]
Abstract
Neuropeptide Y (NPY) is a neurohormone that is typically associated with food intake, but it has also been reported to affect the production of progesterone from luteal tissue in vitro. However, NPY has not been previously immunolocalized in the ovine ovary or in the corpus luteum (CL) of any species, and the effects of this neurohormone on luteal function in vivo are not known. Thus, we performed fluorescent immunohistochemistry (IHC) to localize NPY in the ovine ovary and used avidin-biotin immunocytochemistry (ICC) to further define the intracellular localization within follicles and the CL. We then infused NPY directly into the arterial supply of the autotransplanted ovaries of sheep to determine the in vivo effect of exogenous NPY on ovarian blood flow and on the luteal secretion rate of progesterone and oxytocin. Immunohistochemistry revealed that the NPY antigen was localized to cells within the follicles and CL, in the nerve fibers of the ovarian stroma, and in the vessels of the ovarian hilus. In the follicle, the NPY antigen was localized to nerves and vessels within the theca interna layer, and strong staining was observed in the granulosal cells of antral follicles. In the CL, NPY was localized in large luteal cells and in the vascular pericytes and/or endothelial cells of blood vessels, found dispersed throughout the gland and within the luteal capsule. In vivo incremental infusions of NPY at 1, 10, 100, and 1,000 ng/min, each for a 30-min period, into the arterial supply of the transplanted ovary of sheep bearing a CL 11 d of age increased (P< or =0.05) ovarian blood flow. The intra-arterial infusions of NPY also increased (P< or =0.05) in a dose-dependent manner the secretion rate of oxytocin, which was positively correlated (P< or =0.05) with the observed increase in ovarian blood flow. The infusions of NPY had a minimal effect on the secretion rate of progesterone, and similar intra-arterial infusions of NPY into sheep with ovarian transplants bearing a CL over 30 d of age had no significant effect on ovarian blood flow or on the secretion rate of progesterone. These results suggest that NPY acts on the luteal vascular system and the large luteal cells to rapidly stimulate blood flow and the secretion of oxytocin, respectively, which collectively implies a putative role for NPY during the process of luteolysis when increasing amounts of oxytocin are secreted from the ovine CL in response to uterine pulses of prostaglandin F2alpha.
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Affiliation(s)
- C S Keator
- Department of Animal Science, University of Connecticut, Storrs, CT 06269, USA.
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Barklin A, Theodorsson E, Tyvold SS, Larsson A, Granfeldt A, Sloth E, Tonnesen E. Alteration of Neuropeptides in the Lung Tissue Correlates Brain Death-Induced Neurogenic Edema. J Heart Lung Transplant 2009; 28:725-32. [DOI: 10.1016/j.healun.2009.04.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2008] [Revised: 02/23/2009] [Accepted: 04/07/2009] [Indexed: 11/28/2022] Open
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Ruaño G, Bernene J, Windemuth A, Bower B, Wencker D, Seip RL, Kocherla M, Holford TR, Petit WA, Hanks S. Physiogenomic comparison of edema and BMI in patients receiving rosiglitazone or pioglitazone. Clin Chim Acta 2009; 400:48-55. [DOI: 10.1016/j.cca.2008.10.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Revised: 09/16/2008] [Accepted: 10/07/2008] [Indexed: 12/15/2022]
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Dimitrijević M, Stanojević S, Mićić S, Vujić V, Kovacević-Jovanović V, Mitić K, von Hörsten S, Kosec D. Neuropeptide Y (NPY) modulates oxidative burst and nitric oxide production in carrageenan-elicited granulocytes from rat air pouch. Peptides 2006; 27:3208-15. [PMID: 17010476 DOI: 10.1016/j.peptides.2006.08.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2006] [Revised: 08/27/2006] [Accepted: 08/28/2006] [Indexed: 12/19/2022]
Abstract
We studied the effects of neuropeptide Y (NPY) and NPY-related receptor specific peptides on functions of carrageenan-elicited granulocytes in vitro and ability of NPY to modulate carrageenan-induced air pouch inflammation in rats in vivo. Anti-inflammatory effect of NPY comprises reduced granulocyte accumulation into the air pouch, to some extent attenuation of phagocytosis, attained via Y1 receptor, and considerable decrease in peroxide production, albeit mediated via Y2 and Y5 receptors activation. Conversely, NPY increases nitric oxide production and this potentiation is mediated via Y1 receptor. It is concluded that NPY Y1 and Y2/Y5 receptors' interaction participates in NPY-induced modulation of granulocyte functions related to inflammation.
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Affiliation(s)
- Mirjana Dimitrijević
- Immunology Research Center "Branislav Janković", Institute of Immunology and Virology "Torlak", Vojvode Stepe 458, 11152 Belgrade, Serbia.
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Zhang SX, Wang JJ, Gao G, Shao C, Mott R, Ma JX. Pigment epithelium‐derived factor (PEDF) is an endogenous antiinflammatory factor. FASEB J 2005; 20:323-5. [PMID: 16368716 DOI: 10.1096/fj.05-4313fje] [Citation(s) in RCA: 219] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Pigment epithelium-derived factor (PEDF) is a potent angiogenic inhibitor. Reduced PEDF levels are associated with diabetic retinopathy. However, the mechanism for the protective effects of PEDF against diabetic retinopathy (DR) is presently unclear. As inflammation plays a role in DR, the present study determined the effect of PEDF on inflammation. Western blot analysis and ELISA demonstrated that retinal and plasma PEDF levels were drastically decreased in rats with endotoxin-induced uveitis (EIU), which suggests that PEDF is a negative acute-phase protein. Intravitreal injection of PEDF significantly reduced vascular hyper-permeability in rat models of diabetes and oxygen-induced retinopathy, correlating with the decreased levels of retinal inflammatory factors, including VEGF, VEGF receptor-2, MCP-1, TNF-alpha, and ICAM-1. In cultured retinal capillary endothelial cells, PEDF significantly decreased TNF-alpha and ICAM-1 expression under hypoxia. Moreover, down-regulation of PEDF expression by siRNA resulted in significantly increases of VEGF and TNF-alpha secretion in retinal Müller cells. These findings suggest that PEDF is a novel endogenous anti-inflammatory factor in the eye. The decrease of ocular PEDF levels may contribute to inflammation and vascular leakage in DR.
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Affiliation(s)
- Sarah X Zhang
- Department of Medicine Endocrinology, Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
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