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Leitão F, Leitão SG, de Almeida MZ, Cantos J, Coelho T, da Silva PEA. Medicinal plants from open-air markets in the State of Rio de Janeiro, Brazil as a potential source of new antimycobacterial agents. JOURNAL OF ETHNOPHARMACOLOGY 2013; 149:513-521. [PMID: 23871806 DOI: 10.1016/j.jep.2013.07.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 06/30/2013] [Accepted: 07/06/2013] [Indexed: 06/02/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Several medicinal plants are traditionally traded in open-air markets in Rio de Janeiro State (Brazil) to treat tuberculosis (TB) and related symptoms. AIMS OF THE STUDY Conduct a survey in the open-air markets of 20 cities of Rio de Janeiro State to find medicinal plants that are popularly used to treat tuberculosis and other related diseases and assess their in vitro antimycobacterial activity. MATERIALS AND METHODS We used direct observation and semi-structured interviews and asked herbalists to list species (free listing) in order to gather data about the plant species most commonly used for lung problems. We calculated a Salience Index and acquired two species of "erva-de-passarinho" (mistletoe), Struthanthus marginatus and Struthanthus concinnus (Loranthaceae), commonly used to treat tuberculosis for a bioassay-guided isolation of the antimycobacterial active principles. Extracts, fractions and isolated compounds of both species were assayed in vitro against susceptible (H37Rv) and rifampicin-resistant (ATCC 35338) Mycobacterium tuberculosis strains. RESULTS From the interviews, we generated a list of 36 plant species belonging to 12 families. The mistletoes Struthanthus marginatus and Struthanthus concinnus showed high Salience Index values among plants used to treat tuberculosis. Bioassay-guided fractionation of hexane extracts from both species led to the isolation and/or identification of steroids and terpenoids. The Minimum Inhibitory Concentration (MIC) of the extracts and isolated compounds ranged from 25 to 200 μg/mL. Some of the isolated compounds have been previously assayed against Mycobacterium tuberculosis, others are reported here for the first time (obtusifoliol: MIC H37Rv 50 μg/mL, MIC ATCC 35338 12.5 μg/mL; 3-O-n-acil-lup-20(29)-en-3β,7β,15α-triol: MIC H37Rv 200 μg/mL, MIC ATCC 35338 100 μg/mL). CONCLUSIONS This study demonstrated the importance of ethnobotanical surveys in markets as a source for new drugs and also for scientific validation of folk medicine.
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Coelho T, Maurer M, Plante-Bordeneuve V, Rapezzi C, THAOS Investigators. Baseline Demographics in THAOS - The Transthyretin Amyloidosis Outcomes Survey (P03.149). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p03.149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Kaufmann H, Maurer M, Coelho T, Plante-Bordeneuve V, Rapezzi C, Suhr O, THAOS Investigators. Comparison of US and Non-US Patients with Familial Amyloid Polyneuropathy (FAP) and Familial Amyloid Cardiomyopathy (FAC) in THAOS - The Transthyretin Amyloidosis Outcomes Survey (P01.114). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p01.114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Conceicao I, Coelho T, Plante-Bordeneuve V, Waddington Cruz M, Ericzon B, Falk R, Ikeda S, Maurer M, Suhr O, Ando Y, Mazzeo A, Grogan D. P3.28 Baseline neurologic function in symptomatic patients in the Transthyretin Amyloidosis Outcomes Survey (THAOS). Neuromuscul Disord 2011. [DOI: 10.1016/j.nmd.2011.06.922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Coelho T, Spence C, Almond S, Stone Y, Harrison M, Kanumakala S. Challenges in the management of a young child with Type 1 diabetes mellitus in a family of profoundly deaf parents. Diabet Med 2010; 27:1327-8. [PMID: 20950391 DOI: 10.1111/j.1464-5491.2010.03070.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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D’Oca CDRM, Coelho T, Marinho TG, Hack CRL, da Costa Duarte R, da Silva PA, D’Oca MGM. Synthesis and antituberculosis activity of new fatty acid amides. Bioorg Med Chem Lett 2010; 20:5255-7. [DOI: 10.1016/j.bmcl.2010.06.149] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Revised: 06/24/2010] [Accepted: 06/29/2010] [Indexed: 01/18/2023]
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Do Amaral B, Coelho T, Sousa A, Guimarães A. Usefulness of labial salivary gland biopsy in familial amyloid polyneuropathy Portuguese type. Amyloid 2009; 16:232-8. [PMID: 19922336 DOI: 10.3109/13506120903421850] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND The diagnosis of amyloidosis of all types is definitively made by demonstration of Congo red binding material in the affected tissues. Nerve biopsy was classically used to diagnose amyloid polyneuropathy but less invasive alternative types of biopsies have been proposed including labial salivary gland (LSG) biopsy, a minimally invasive procedure. METHOD LSG biopsies were done in 87 subjects with molecular diagnosis of TTRVal30Met mutation. The group includes 76 patients in different stages of familial amyloid polyneuropathy and 11 asymptomatic carriers. They were all submitted to a stomatological and a neurological observation to evaluate oral health problems and to determine the neurological stage of the disease. No major oral health problems were found. Mean age of onset of the symptomatic disease was 32.8 years (+/-9.69 SD). CONCLUSIONS No significant side effects occurred after the surgical procedure, and adequate material for pathological analysis was always obtained. Amyloid deposition was found in 91% of the patients. Patients with negative biopsies (N = 7) were all in the earlier stage of the disease. Two asymptomatic carriers had biopsies with amyloid deposition. We conclude that LSG biopsy is a useful, sensitive and minimal invasive method to detect amyloid deposition.
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Cardoso M, Santos E, Carvalho A, Coelho T. D.P.4.01 Endocrine and metabolic disorders in Myotonic Dystrophy type 1. Neuromuscul Disord 2008. [DOI: 10.1016/j.nmd.2008.06.249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Oliveira J, Santos R, Soares-Silva I, Jorge P, Vieira E, Oliveira ME, Moreira A, Coelho T, Ferreira JC, Fonseca MJ, Barbosa C, Prats J, Aríztegui ML, Martins ML, Moreno T, Heinimann K, Barbot C, Pascual-Pascual SI, Cabral A, Fineza I, Santos M, Bronze-da-Rocha E. LAMA2 gene analysis in a cohort of 26 congenital muscular dystrophy patients. Clin Genet 2008; 74:502-12. [DOI: 10.1111/j.1399-0004.2008.01068.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Santos M, Coelho T, Machado A, Cerqueira R, Fernandes A, Tavares P. N.P.3 09 Hereditary neuropathies in a pediatric clinic. Neuromuscul Disord 2006. [DOI: 10.1016/j.nmd.2006.05.085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Martins L, Pedroso S, Henriques AC, Dias L, Sarmento AM, Seca R, Oliveira F, Dores J, Lhamas A, Coelho T, Ribeiro A, Esteves S, Pereira R, Almeida R, Amil M, Cabrita A, Teixeira M. Simultaneous Pancreas-Kidney Transplantation: Five-Year Results From a Single Center. Transplant Proc 2006; 38:1929-32. [PMID: 16908326 DOI: 10.1016/j.transproceed.2006.06.089] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
We report the 5-year results of our simultaneous pancreas-kidney transplantation (SPKT) program, started on May 2, 2000. Forty-two SPKT were performed on 42 type I diabetic patients with chronic renal failure. The procedure was performed with enteric diversion and vascular anastomosis to the iliac vessels. Immunosuppressive protocol included antithymocyte globulin, tacrolimus, mycophenolate mofetil, and steroids. The 24 women and 18 men had a mean age of 33.5 +/- 6.3 years and mean 22.8 +/- 14.2 years time of diabetes evolution. Forty patients had been on dialysis for 34.3 +/- 24.1 months, and two were preemptive transplantations. Acute rejection episodes were treated in eight patients (19.1%): in three cases they affected both organs; in two only the kidney was affected; and the other three were pancreas graft rejections. The incidence of postoperative complications requiring re-operation was 42.9%, mostly pancreas graft related. Two patients died, one due to cardiovascular disease; the other was transplant related. Three kidney grafts were lost, and the causes were immunologic, thrombosis, and patient death. Pancreas graft loss occurred in seven patients: thrombosis (n = 3); infection (n = 3); immunologic (n = 1). The patients with surviving grafts were doing well, with normal kidney and pancreas function: serum creatinine = 0.89 +/- 0.15 mg/dL; fasting blood glucose = 79 +/- 16 mg/dL; HbA1c = 4.7 +/- 1.1%. The 1-year patient, kidney, and pancreas survival rates were 97.3%, 94.6%, and 83.8% and 5-year values, 91.7%, 89.2%, and 78.7%, respectively. In conclusion, these results are similar to the most recent UNOS/IPTR reports, leading us to consider our experience with SPKT very positive.
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Da Silva AM, Rocha N, Pinto M, Alves V, Farinha F, Correia AP, Coelho T, Magalhães M. Tremor as the first neurological manifestation of Sneddon's syndrome. Mov Disord 2004; 20:248-51. [PMID: 15382213 DOI: 10.1002/mds.20270] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We report on a 54-year-old woman with Sneddon's syndrome manifested by livedo reticularis, fetal losses, hypertension, and high antinuclear antibody titres. At the age of 42 years she developed tremor of the trunk, limbs, and head only in the standing position that interfered with walking, followed some years later by cognitive decline and a parkinsonian syndrome. T2-weighted brain magnetic resonance imaging showed high signal in cortical areas, basal ganglia, midbrain, and cerebellum.
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Martins L, Henriques A, Dias L, Ventura A, Seca R, Almeida R, Dores J, Bacelar C, Oliveira F, Lhamas A, Amil M, Rua F, Coelho T, Esteves S, Ribeiro A, Pereira R, Sarmento A, Teixeira M, Pereira M. Combined pancreas-kidney transplantation: a new program in Portugal, results from the first 12 cases. Transplant Proc 2003; 35:1107-8. [PMID: 12947877 DOI: 10.1016/s0041-1345(03)00327-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Guimarães CP, Lemos M, Menezes I, Coelho T, Sá-Miranda C, Azevedo JE. Characterisation of two mutations in the ABCD1 gene leading to low levels of normal ALDP. Hum Genet 2001; 109:616-22. [PMID: 11810273 DOI: 10.1007/s00439-001-0632-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2001] [Accepted: 09/14/2001] [Indexed: 11/25/2022]
Abstract
A variety of mutations have been identified in the X-linked adrenoleukodystrophy (X-ALD) gene, none of which is prevalent. In this work we describe a reverse transcription polymerase chain reaction (RT-PCR)-based strategy specially suited to the molecular characterisation of mutations in index cases. After RT-PCR amplification of the X-ALD transcript a conformation-sensitive gel electrophoresis analysis is performed followed by sequencing of the fragments with altered mobility. Two X-ALD patients were studied using this strategy. In both cases, splice site mutations were found. The first patient studied has a single base substitution at the first position of the invariant GT dinucleotide donor splice site of intron 8. In spite of this alteration, small quantities of correctly spliced mRNA molecules were easily detected. In agreement with these data, a small amount of ALDP was found by western blotting analysis. An alteration at the -1 position of the donor splice site of exon 1 was detected in the second patient. This mutation results in the utilisation of a cryptic 5' splice site within intron 1. Nevertheless, this transition also allows for some correct splicing. Western blotting analysis revealed the existence of normal-migrating ALDP. However, as expected, the levels of this protein were greatly decreased. Taken together, our data suggest that some less severe or late-onset forms of X-ALD associated with splice mutations result from the production of small amounts of normal ALDP. It is proposed that the quantification of ALDP levels in these patients could provide important insights concerning the correlation between clinical phenotype and amount of normal ALDP.
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Vilarinho L, Santorelli FM, Cardoso ML, Coelho T, Guimarães A, Coutinho P. Mitochondrial DNA analysis in ocular myopathy. Observations in 29 Portuguese patients. Eur Neurol 2000; 39:148-53. [PMID: 9605391 DOI: 10.1159/000007925] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We analyzed 29 patients with progressive external ophthalmoparesis (PEO) either alone or as part of a multisystem disorder. Ragged-red fibers were very abundant (10-20%) in 15 patients, and many of them were also cytochrome c oxidase-negative. Biochemical analysis of the respiratory chain showed partial defects of single or multiple complexes in 18 patients (64%). Eleven PEO patients (38%) harbored single large-scale mtDNA deletions in muscle, which averaged 5.4 kb in size and 47% in relative abundance. One PEO patient harbored the A3243G mutation (MELAS mutation) in muscle (63%). Our findings, the first reported in Portuguese patients, confirm that single large-scale mtDNA deletions are a significant cause of PEO. Although ophthalmoparesis was the main clinical feature in the majority of patients, the clinical spectrum is broad, ranging from severe encephalopathy of childhood to a milder, though disabling, muscle weakness in adults.
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Coelho T, Braga J, Sequeira M. Hepatic hematomas in pregnancy. Acta Obstet Gynecol Scand 2000; 79:884-6. [PMID: 11304974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Munar-Qués M, Pedrosa JL, Coelho T, Gusmão L, Seruca R, Amorim A, Sequeiros J. Two pairs of proven monozygotic twins discordant for familial amyloid neuropathy (FAP) TTR Met 30. J Med Genet 1999; 36:629-32. [PMID: 10465115 PMCID: PMC1762972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
Twin studies are an important tool in medical genetics for the evaluation of the relative roles of genetic and non-genetic factors in several diseases. Familial amyloidotic polyneuropathy type I (FAP-I), TTR Met 30, was present in two sets of proven monozygotic (MZ) twins, one from Majorca and the other from Portugal. Monozygosity was established by analysis of DNA polymorphisms. Both pairs were discordant for age at onset and some clinical manifestations of FAP-I. We reviewed the differences in age at onset and clinical features in both sets and in two other pairs of presumed MZ twins with FAP-I and compared them with those in MZ twin pairs with other Mendelian disorders, such as neurofibromatosis type 1, Huntington's disease, facioscapulohumeral muscular dystrophy, and myotonic dystrophy. We conclude that, in addition to the postulated modifying genes, there must be a significant contribution from non-genetic factors to the phenotypic variability of FAP-I (age at onset and clinical expression), either because of environmental differences or stochastic events during (or after) the twinning process.
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Soares M, Buxbaum J, Sirugo G, Coelho T, Sousa A, Kastner D, Saraiva MJ. Genetic anticipation in Portuguese kindreds with familial amyloidotic polyneuropathy is unlikely to be caused by triplet repeat expansions. Hum Genet 1999; 104:480-5. [PMID: 10453736 DOI: 10.1007/s004390050991] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Familial amyloidotic polyneuropathy (FAP) is a lethal autosomal dominant type of amyloidosis resulting from the deposition of transthyretin (ATTR) variants in the peripheral and autonomic nervous systems. ATTR V30M-associated FAP exhibits marked genetic anticipation in some families, with clinical symptoms developing at an earlier age in successive generations. The genetic basis of this phenomenon in FAP is unknown. Anticipation has been associated with the dynamic expansion of trinucleotide repeats in several neurodegenerative disorders, such as Huntington disease, myotonic dystrophy, and fragile X syndrome. We have used the repeat expansion detection (RED) assay to screen affected members of Portuguese FAP kindreds for expansion of any of the ten possible trinucleotide repeats. Nine generational pairs with differences in their age of onset greater than 12 years and a control pair with identical ages of onset were tested. No major differences were found in the lengths of the ten trinucleotide repeats analyzed. The distribution of the maximal repeat sizes was consistent with reported studies in unrelated individuals with no known genetic disease. The present data do not support a role for trinucleotide repeat expansions as the molecular mechanism underlying anticipation in Portuguese FAP.
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Beirão I, Lobato L, Guimarães SM, Cardoso P, Costa PM, Coelho T, Rocha G, Guimarães S. Early destructive spondyloarthropathy from combined beta2-microglobulin and transthyretin Met30 amyloidosis in a dialysed patient. Nephrol Dial Transplant 1998; 13:3223-5. [PMID: 9870498 DOI: 10.1093/ndt/13.12.3223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Leyton J, Coelho T, Coy DH, Jakowlew S, Birrer MJ, Moody TW. PACAP(6-38) inhibits the growth of prostate cancer cells. Cancer Lett 1998; 125:131-9. [PMID: 9566707 DOI: 10.1016/s0304-3835(97)00525-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The effects of pituitary adenylyl cyclase activating polypeptide (PACAP) analogs on prostate cancer cell lines was investigated. 125I-PACAP-27 bound with high affinity to PC-3 cells (Kd = 10 nM) to a single class of sites (Bmax = 30000/cell). By RT-PCR, a major 305 bp band was observed using cDNA derived from PC-3, LNCaP or DU-145 cells. Specific 125I-PACAP binding was inhibited with high affinity by PACAP-27, PACAP-38 and PACAP(6-38) (IC50 values of 15, 10 and 300 nM, respectively) but not by PACAP(28-38). PACAP elevated cAMP and the increase caused by PACAP-27 was reversed by PACAP(6-38). PACAP transiently increased c-fos gene expression and the increase in c-fos mRNA was reversed by PACAP(6-38). PACAP-27 stimulated colony formation in PC-3 cells, whereas PACAP(6-38) reduced colony number and size. In nude mice bearing PC-3 xenografts, PACAP(6-38) significantly slowed tumor growth. These data suggest that biologically active type 1 PACAP receptors are present on human prostate cancer cells and that prostate cancer cell growth is inhibited by PACAP(6-38).
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Moody TW, Leyton J, Coelho T, Jakowlew S, Takahashi K, Jameison F, Koh M, Fridkin M, Gozes I, Knight M. (Stearyl, Norleucine17)VIP hybrid antagonizes VIP receptors on non-small cell lung cancer cells. Life Sci 1997; 61:1657-66. [PMID: 9363981 DOI: 10.1016/s0024-3205(97)00771-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The effects of VIP receptor antagonists were investigated using non-small cell lung cancer (NSCLC) cells. By Northern blot and RT-PCR, VIP1 receptors were detected on NSCLC cell line NCI-H1299. VIPhybrid,(N-Stearyl-Norleucine17) VIPhybrid ((SN) VIPhybrid) and PTC4495 inhibited 125I-VIP binding to NCI-H1299 cells with IC50 values of 500, 30 and 5000 nM respectively. (SN) VIPhybrid (1 microM) had no effect on basal cAMP but strongly inhibited the increase in cAMP caused by 10 nM VIP. The order of peptide potency to inhibit cAMP was (SN) VIPhybrid > VIPhybrid > PTC4495. (SN) VIPhybrid was more potent than VIPhybrid at inhibiting NCI-H1299 colony formation. Also, (SN) VIPhybrid was more potent than VIPhybrid at inhibiting NCI-H1299 xenograft formation in nude mice. These data suggest that (SN) VIPhybrid antagonizes VIP1 receptors on NSCLC cells.
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Sousa A, Barros J, Coelho T, Lobato L, Drugge U, Sandgren O, Wikström L, Andersson R, Holmgren G, Costa P, Monteiro L, Sequeiros J. 4-48-08 Familial amyloid neuropathy (FAP-type I) in Portugal and Sweden: A more variable disease than the one first described. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)86200-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Vilarinho L, Maia C, Coelho T, Coutinho P, Santorelli FM. Heterogeneous presentation in Leigh syndrome. J Inherit Metab Dis 1997; 20:704-5. [PMID: 9323566 DOI: 10.1023/a:1005330611147] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Pisegna JR, Leyton J, Coelho T, Hida T, Jakowlew S, Birrer M, Fridkin M, Gozes I, Moody TW. PACAP hybrid: a new PACAP receptor antagonist. Life Sci 1997; 61:631-9. [PMID: 9250719 DOI: 10.1016/s0024-3205(97)00438-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The effects of pituitary adenylate cyclase activating polypeptide (PACAP) hybrid, a synthetic antagonist, was investigated on NIH/3T3 cells containing PACAP receptor (R) splice variants (SVs). PACAPhybrid inhibited 125I-PACAP-27 binding to NIH/3T3 cells stably expressing PACAP-R basic, SV-1, SV-2 or SV-3 with an IC50 of 1000 nM. PACAPhybrid antagonized the ability of PACAP-27 to elevate cAMP regardless of the PACAP-R SV used. PACAP was more efficacious at increasing cytosolic Ca2+ in NIH/3T3 cells containing PACAP-R SV-2 than PACAP-R basic, SV-1 or SV-3. PACAPhybrid antagonized the increase in cytosolic Ca2+ caused by PACAP-27 regardless of the PACAP-R SV used. PACAP was more potent at elevating c-fos mRNA using NIH/3T3 cells transfected with PACAP-R SV-2 than PACAP-R basic, SV-1 or SV-3. PACAPhybrid antagonized the increase in c-fos mRNA caused by PACAP-27. These data suggest that PACAPhybrid is a useful PACAP receptor antagonist for PACAP-R SVs.
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