Mechanisms mediating substance P-induced contraction in the rat iris in vitro.

Abstract:

PURPOSE:To determine some of the mechanisms by which substance P (SP) induces contraction in the isolated rat iris. METHODS:Rings of rat iris were mounted in a 5-ml organ chamber containing Krebs solution at 37 degrees C under basal tension of 75 mg, and isometric tension was recorded. RESULTS:Substance P produced graded contraction in the rat iris, being approximately 40-fold more potent than carbachol. Peptidase inhibitors (captopril, phosphoramidon, thiorphan) did not affect the SP response. The SP contraction was dependent on external Ca2+ by a mechanism resistant to both nifedipine and omega-conotoxin GVIA. Atropine and tetrodotoxin significantly shifted the SP response to the right (three- and fivefold, respectively). Neither phorbol nor genistein altered the SP-induced contraction, whereas staurosporine caused a weak inhibition. Indomethacin, pyrilamine, guanethidine, 8-37 calcitonin gene-related peptide (CGRP) fragment, and NG-nitro-L-arginine methyl ester had no effect on SP response. All the natural tachykinin agonists caused concentration-dependent contraction in rat iris with similar maximal responses. The NK3 selective agonist senktide caused graded contraction, being approximately 150-fold more active than the NK2 selective agonist [beta-ala] NKA. The NK1 selective agonist SP methyl ester induced a small contraction. The NK3 and NK2 antagonists SR 142801 and SR 48968 shifted the SP response to the right. Schilds plots gave pA2 (negative logarithm of the molar concentration of antagonist causing a twofold rightward displacement of the concentration response curves) values of 9.37 and 7.97 and slopes of 0.70 and 1.02, respectively. CONCLUSIONS:Substance P produces a potent contraction in the isolated rat iris that seems to depend on the neural release of acetylcholine by tetrodotoxin-sensitive mechanisms. Its response relies largely on external Ca2+, through mechanisms independent of activation of L- or N-type Ca2+ channels, and is probably mediated via activation of NK3 and NK2 receptors.

authors

Grumann-Júnior A,Dias MA,Alves RV,Boteon JE,Calixto JB

keywords:

subject

Has Abstract

pub_date

2000-06-01 00:00:00

pages

1861-70

issue

7

eissn

0146-0404

issn

1552-5783

journal_volume

41

pub_type

杂志文章
  • Autophagy in the Aging and Experimental Ocular Hypertensive Mouse Model.

    abstract:Purpose:To investigate autophagy in the outflow pathway and ganglion cell layer in the aging and ocular hypertensive mouse. Methods:Both 4-month-old and 18-month-old C57BL/6J and GFP-LC3 mice were subjected to unilateral injection of hypertonic saline into a limbal vein, causing sclerosis of the outflow pathway and su...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.61.10.31

    authors: Nettesheim A,Dixon A,Shim MS,Coyne A,Walsh M,Liton PB

    更新日期:2020-08-03 00:00:00

  • Cholesterol, phospholipid, and protein changes in focal opacities in the human eye lens.

    abstract:PURPOSE:Focal opacities are signs of early cataractogenesis in the human lens. They progress slowly over a lifetime and may be precursors of mature cataracts. The authors analyzed changes in proteins, phospholipids, and cholesterol in these opacities using in situ techniques: Raman microspectroscopy, filipin cytochemis...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:

    authors: Duindam JJ,Vrensen GF,Otto C,Greve J

    更新日期:1998-01-01 00:00:00

  • Immunofluorescence Tomography of Mouse Ocular Surface Epithelial Stem Cells and Their Niche Microenvironment.

    abstract:PURPOSE:Currently, there are no definitive immunomarkers for epithelial stem cells (corneal and conjunctival) or their poorly understood niche microenvironment. The H2B-GFP/K5tTA mouse enables visualization of label-retaining cells (LRCs), which exhibit the functional marker of stem cell quiescence. We used immunofluor...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.15-18038

    authors: Parfitt GJ,Kavianpour B,Wu KL,Xie Y,Brown DJ,Jester JV

    更新日期:2015-11-01 00:00:00

  • Lens epithelium-derived growth factor promotes photoreceptor survival in light-damaged and RCS rats.

    abstract:PURPOSE:To investigate possible protective effects of lens epithelium-derived growth factor (LEDGF) against photoreceptor death in light-damaged, Royal College of Surgeons (RCS) and P23H rhodopsin transgenic rats. METHODS:Twelve-week-old Sprague-Dawley (SD), 6-week-old RCS, and 10-day-old P23H (line 1, heterozygote) r...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:

    authors: Machida S,Chaudhry P,Shinohara T,Singh DP,Reddy VN,Chylack LT Jr,Sieving PA,Bush RA

    更新日期:2001-04-01 00:00:00

  • Keratoconus and contact lens-induced corneal warpage analysis using the keratomorphic diagram.

    abstract:PURPOSE:Videokeratography of early keratoconus may be difficult to distinguish from contact lens-induced corneal warpage, even by experienced examiners. Furthermore, topographic irregularity may be judged inconsistently if quantitative standards are not applied. Quantitative measures based on videokeratographic data we...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:

    authors: Smolek MK,Klyce SD,Maeda N

    更新日期:1994-12-01 00:00:00

  • Endogenic regulation of proliferation and zinc transporters by pigment epithelial cells nonvirally transfected with PEDF.

    abstract:PURPOSE:Genetic modification of cells before transplantation may allow the delivery of neuroprotective and other functional molecules to patients with neurodegenerative diseases. To avoid complications associated with virally transfected cells, we have explored the use of nonviral methods to insert genetic material int...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.10-6178

    authors: Johnen S,Kazanskaya O,Armogan N,Stickelmann C,Stöcker M,Walter P,Thumann G

    更新日期:2011-07-23 00:00:00

  • Configuration of the optic chiasm in humans with albinism as revealed by magnetic resonance imaging.

    abstract:PURPOSE:To determine whether the size and configuration of the optic chiasm in humans with albinism is different from that in normal control subjects. METHODS:Seventeen patients and 15 control subjects underwent magnetic resonance imaging of the entire head. Images were reformatted to the chiasm region and analyzed wi...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.02-0156

    authors: Schmitz B,Schaefer T,Krick CM,Reith W,Backens M,Käsmann-Kellner B

    更新日期:2003-01-01 00:00:00

  • Progressive Loss of Retinal Ganglion Cells and Axons in Nonoptic Neuritis Eyes in Multiple Sclerosis: A Longitudinal Optical Coherence Tomography Study.

    abstract:PURPOSE:To examine the rate of retinal ganglion cell (RGC) layer and retinal nerve fiber layer (RNFL) changes in nonoptic neuritis (NON) eyes of relapsing remitting multiple sclerosis (RRMS) patients, and to find a specific imaging parameter useful for identifying disease progression. METHODS:Forty-five consecutive RR...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.15-19047

    authors: Graham EC,You Y,Yiannikas C,Garrick R,Parratt J,Barnett MH,Klistorner A

    更新日期:2016-04-01 00:00:00

  • The insensitivity of the chicken eye to the inflammatory effects of x-rays in contrast to its sensitivity to other inflammatory agents.

    abstract::The effects of x-rays and three chemical agents, known to cause intraocular inflammation in mammalian eyes, were studied on the chicken eye because this species was reported to be insensitive to the cataractogenic effects of x-rays. Intravitreal injection of Shigella endotoxin and topical and/or intravitreal administr...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:

    authors: Stetz DE,Bito LZ

    更新日期:1978-05-01 00:00:00

  • CD11b+GR1+ myeloid cells secrete NGF and promote trigeminal ganglion neurite growth: implications for corneal nerve regeneration.

    abstract:PURPOSE:We characterized fluorescent bone marrow cells (YFP(+) BMCs) in the thy1-YFP mouse and determine if they promote trigeminal ganglion (TG) cell neurite growth. METHODS:Excimer laser annular keratectomy was performed in thy1-YFP mice, and corneas were imaged. BMCs were harvested from femur and tibia, and the exp...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.13-12237

    authors: Sarkar J,Chaudhary S,Jassim SH,Ozturk O,Chamon W,Ganesh B,Tibrewal S,Gandhi S,Byun YS,Hallak J,Mahmud DL,Mahmud N,Rondelli D,Jain S

    更新日期:2013-09-03 00:00:00

  • Severe molecular defects of a novel FOXC1 W152G mutation result in aniridia.

    abstract:PURPOSE:FOXC1 mutations result in Axenfeld-Rieger syndrome, a disorder characterized by a broad spectrum of malformations of the anterior segment of the eye and an elevated risk for glaucoma. A novel FOXC1 W152G mutation was identified in a patient with aniridia. Molecular analysis was conducted to determine the functi...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.08-3032

    authors: Ito YA,Footz TK,Berry FB,Mirzayans F,Yu M,Khan AO,Walter MA

    更新日期:2009-08-01 00:00:00

  • Insertion of a Pax6 consensus binding site into the alphaA-crystallin promoter acts as a lens epithelial cell enhancer in transgenic mice.

    abstract:PURPOSE:Although the murine alphaA-crystallin promoter is the most commonly used promoter for achieving transgene expression in the developing lens, this promoter directs transgene expression efficiently only in lens fiber cells. The purpose of the present study was to generate promoters capable of directing transgene ...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.03-0856

    authors: Zhao H,Yang Y,Rizo CM,Overbeek PA,Robinson ML

    更新日期:2004-06-01 00:00:00

  • Measurement variability in Heidelberg Retina Tomograph imaging of neuroretinal rim area.

    abstract:PURPOSE:To investigate the optimal frequency of imaging during follow-up to detect glaucoma progression by characterizing variability (noise) in neuroretinal rim area (RA) measured by Heidelberg Retina Tomograph (HRT; Heidelberg Engineering, Heidelberg, Germany). METHODS:RA noise was estimated from patient data and ch...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.06-0096

    authors: Owen VM,Strouthidis NG,Garway-Heath DF,Crabb DP

    更新日期:2006-12-01 00:00:00

  • Heat shock protein 90 is an essential molecular chaperone for nuclear transport of glucocorticoid receptor beta.

    abstract:PURPOSE:Glucocorticoid sensitivity in glaucoma has been attributed to differences in the expression of the two glucocorticoid receptors, GRalpha and GRbeta. GRalpha undergoes steroid-dependent nuclear translocation by associating with a heat shock protein (Hsp)90 multiprotein heterocomplex. The nuclear transport of the...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.05-0697

    authors: Zhang X,Clark AF,Yorio T

    更新日期:2006-02-01 00:00:00

  • Interferon regulatory factor-1 in flagellin-induced reprogramming: potential protective role of CXCL10 in cornea innate defense against Pseudomonas aeruginosa infection.

    abstract:PURPOSE:We previously showed that pre-exposure of the cornea to Toll-like receptor (TLR)5 ligand flagellin induces strong protective innate defense against microbial pathogens and hypothesized that flagellin modulates gene expression at the transcriptional levels. Thus, we sought to determine the role of one transcript...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.13-12453

    authors: Yoon GS,Dong C,Gao N,Kumar A,Standiford TJ,Yu FS

    更新日期:2013-11-15 00:00:00

  • Reduction of steroid-induced intraocular pressure elevation in sheep by tissue plasminogen activator.

    abstract:PURPOSE:To investigate whether tissue plasminogen activator (tPA) can prevent and/or reverse steroid-induced IOP elevation in an ovine model. METHODS:Three animal groups were subjected to bilateral steroid-induced IOP elevation using thrice daily topical ocular prednisolone administration. In the first group (N = 8), ...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.13-12801

    authors: Gerometta R,Kumar S,Shah S,Alvarez L,Candia O,Danias J

    更新日期:2013-12-03 00:00:00

  • Motion perception in glaucoma.

    abstract:PURPOSE:This study was performed to investigate motion perception in patients with glaucoma. METHODS:A random dot motion test was used to measure three aspects of central motion perception: minimum displacement threshold (Dmin), maximum displacement threshold (Dmax), and coherence threshold (signal to noise). Motion p...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:

    authors: Bullimore MA,Wood JM,Swenson K

    更新日期:1993-12-01 00:00:00

  • Relaxation of beta-structure in tear lipocalin and enhancement of retinoid binding.

    abstract:PURPOSE:To study binding of retinoids to human tear lipocalin (TL) to assess factors influencing ligand affinity and delivery. Mechanistic features of retinoid interactions with TL were investigated, including the influence of the retinoid functional group on ligand affinity, the relative affinity of retinol versus fat...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:

    authors: Gasymov OK,Abduragimov AR,Yusifov TN,Glasgow BJ

    更新日期:2002-10-01 00:00:00

  • Retinal protection from acute glaucoma-induced ischemia-reperfusion injury through pharmacologic induction of heme oxygenase-1.

    abstract:PURPOSE:To investigate the protective effects of cobalt protoporphyrin (CoPP), a potent heme oxygenase (HO)-1 inducer, in a rat model of ischemia-reperfusion injury and to document the possible antiapoptotic and anti-inflammatory mechanisms underlying the protection. METHODS:Rats pretreated with intraperitoneal inject...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.09-4086

    authors: Sun MH,Pang JH,Chen SL,Han WH,Ho TC,Chen KJ,Kao LY,Lin KK,Tsao YP

    更新日期:2010-09-01 00:00:00

  • Development of Transparent Acellular Dermal Matrix as Tissue-Engineered Stroma Substitute for Central Lamellar Keratoplasty.

    abstract:Purpose:To improve the transparency of the acellular dermal matrix (ADM) and investigate the optical, mechanical and histologic properties and biocompatibility of transparent ADM (TADM) in lamellar keratoplasty. Methods:A stepwise sectioning strategy was applied to determine the transparency distribution of the ADM, a...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.61.1.5

    authors: Wang Y,Ma J,Jiang X,Liu Z,Yang J,Li X

    更新日期:2020-01-23 00:00:00

  • Functional and Anatomical Outcomes in Patients With Serous Retinal Detachment in Diabetic Macular Edema Treated With Ranibizumab.

    abstract:Purpose:To assess the effect of serous retinal detachment (SRD) on functional and anatomical outcomes in ranibizumab-treated patients with diabetic macular edema (DME). Methods:All consecutive ranibizumab-treated patients with SRD were included in this retrospective study. For each patient with SRD, a patient without ...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.16-20855

    authors: Giocanti-Aurégan A,Hrarat L,Qu LM,Sarda V,Boubaya M,Levy V,Chaine G,Fajnkuchen F

    更新日期:2017-02-01 00:00:00

  • Effect of blur adaptation on blur sensitivity and discrimination in emmetropes and myopes.

    abstract:PURPOSE:To determine whether blur adaptation influences blur sensitivity and blur discrimination thresholds in young adult myopes and emmetropes. In addition, to determine whether there is a differential effect of blur adaptation on blur sensitivity and discrimination between refractive error groups. METHODS:Proximal ...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.06-0836

    authors: Cufflin MP,Mankowska A,Mallen EA

    更新日期:2007-06-01 00:00:00

  • Cholera toxin stimulates adenosine 3',5'-monophosphate synthesis and epithelial wound closure in the rabbit cornea.

    abstract::Rabbit corneas were treated in vitro and in vivo with cholera toxin (CTX), a specific and irreversible activator of adenylate cyclase. Tissue pieces incubated in vitro in the presence of 10 mug/ml CTX for 15 min continuously synthesized adenosine 3',5'-monophosphate (cyclic AMP) at an increased rate for 3 hr in the ab...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:

    authors: Jumblatt MM,Fogle JA,Neufeld AH

    更新日期:1980-11-01 00:00:00

  • Beta-adrenergic stimulation of Na+, K+, Cl- cotransport in fetal nonpigmented ciliary epithelial cells.

    abstract:PURPOSE:The effects of adrenergic agonists and antagonists on Na+, K+, Cl- cotransport in fetal human nonpigmented ciliary epithelial (NPE) cells were investigated. METHODS:86Rb+ as a marker for K+ was used to study ouabain-insensitive, bumetanide-sensitive 86Rb+ uptake in cultured NPE monolayers. Cyclic adenosine mon...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:

    authors: Crook RB,Riese K

    更新日期:1996-05-01 00:00:00

  • Regional Differences and Physiologic Behaviors in Peripapillary Scleral Fibroblasts.

    abstract:Purpose:The purpose of this study was to describe the cellular architecture of normal human peripapillary sclera (PPS) and evaluate surface topography's role in fibroblast behavior. Methods:PPS cryosections from nonglaucomatous eyes were labelled for nuclei, fibrillar actin (FA), and alpha smooth muscle actin (αSMA) a...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.62.1.27

    authors: Szeto J,Chow A,McCrea L,Mozzer A,Nguyen TD,Quigley HA,Pitha I

    更新日期:2021-01-04 00:00:00

  • Analysis of antigenic determinants of retinal S-antigen with monoclonal antibodies.

    abstract::Eight murine monoclonal antibodies to retinal S-antigen were found to recognize three antigenic clusters in competitive binding experiments. Variable patterns of immunohistochemical staining of retinal sections supported the competitive binding studies. Monoclonal antibodies to two of these three antigenic clusters on...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:

    authors: Banga JP,LeRoy F,Suleyman S,Kasp E,Brown E,Dumonde D

    更新日期:1988-01-01 00:00:00

  • β-Zone parapapillary atrophy and the rate of retinal nerve fiber layer thinning in glaucoma.

    abstract:PURPOSE:To evaluate whether β-zone parapapillary atrophy (PPA) is associated with the rate of retinal nerve fiber layer (RNFL) thickness change as assessed by trend-based analysis using time-domain optical coherence tomography (OCT). METHODS:This retrospective cohort study included 202 glaucomatous eyes that were obse...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.10-6818

    authors: Lee EJ,Kim TW,Weinreb RN,Park KH,Kim SH,Kim DM

    更新日期:2011-06-22 00:00:00

  • Role of Endothelium in Abnormal Cannabidiol-Induced Vasoactivity in Retinal Arterioles.

    abstract:PURPOSE:Cannabinoids have been reported to mediate changes in vascular resistance through endothelial receptor targets. We examined involvement of the endothelium in cannabinoid-mediated vasoactive responses in resistance arterioles of the retina. METHODS:Vascular responses to both intraluminal (IL) and extraluminal (...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.14-14879

    authors: Su EN,Kelly ME,Cringle SJ,Yu DY

    更新日期:2015-06-01 00:00:00

  • Development of a gene therapy virus with a glucocorticoid-inducible MMP1 for the treatment of steroid glaucoma.

    abstract:PURPOSE:To design a glucocorticoid-inducible virus vector overexpressing recombinant matrix metalloproteinase 1 (MMP1) and counteract extracellular matrix deposition in the trabecular meshwork only when steroid is present. METHODS:Endogenous MMP1 expression was measured in primary human trabecular meshwork cells (HTM)...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.09-4918

    authors: Spiga MG,Borrás T

    更新日期:2010-06-01 00:00:00

  • A conditional immortalized mouse muller glial cell line expressing glial and retinal stem cell genes.

    abstract:PURPOSE:Müller glia have multiple functions in the retina, including synthesis of neurotrophic factors, uptake and metabolism of neurotransmitters, spatial buffering of ions, maintenance of the blood-retinal barrier, and response to injury. A population of Müller glia has some stem cell-like characteristics both in viv...

    journal_title:Investigative ophthalmology & visual science

    pub_type: 杂志文章

    doi:10.1167/iovs.10-5395

    authors: Otteson DC,Phillips MJ

    更新日期:2010-11-01 00:00:00