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Asseiceira I, Mexia S, Pinheiro J, Pereira L, Barreto C. 269 Nutritional assessment and dietary intake in children and teenagers with cystic fibrosis. J Cyst Fibros 2013. [DOI: 10.1016/s1569-1993(13)60410-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Barreto C, Hansen E, Fredriksen S. Advantages of polycarboxylic over dicarboxylic anhydrides in the melt modification of PPC. EXPRESS POLYM LETT 2013. [DOI: 10.3144/expresspolymlett.2013.87] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Vinhas J, Barreto C, Assunção J, Parreira L, Vaz A. Treatment of Anaemia with Erythropoiesis-Stimulating Agents in Patients with Chronic Kidney Disease Does Not Lower Mortality and May Increase Cardiovascular Risk: A Meta-Analysis. Nephron Clin Pract 2012. [DOI: 10.1159/000345158] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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De Boeck K, Kent L, Davies J, Derichs N, Amaral M, Rowe SM, Middleton P, de Jonge H, Bronsveld I, Wilschanski M, Melotti P, Danner-Boucher I, Boerner S, Fajac I, Southern K, de Nooijer RA, Bot A, de Rijke Y, de Wachter E, Leal T, Vermeulen F, Hug MJ, Rault G, Nguyen-Khoa T, Barreto C, Proesmans M, Sermet-Gaudelus I. CFTR biomarkers: time for promotion to surrogate end-point. Eur Respir J 2012; 41:203-16. [DOI: 10.1183/09031936.00057512] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Castanhinha S, Pereira L, Aguiar S, Ramirez M, Rodrigues T, Barreto C, Melo Cristino J. 117 Diagnosis of Pseudomonas aeruginosa infection using serology in children with cystic fibrosis. J Cyst Fibros 2012. [DOI: 10.1016/s1569-1993(12)60287-2] [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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Abbott J, Hart A, Havermans T, Matossian A, Goldbeck L, Barreto C, Bergsten-Brucefors A, Besier T, Catastini P, Lupi F, Staab D. Measuring health-related quality of life in clinical trials in cystic fibrosis. J Cyst Fibros 2011; 10 Suppl 2:S82-5. [DOI: 10.1016/s1569-1993(11)60013-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pinto M, Pereira L, Rodrigues T, Barreto C. Cystic fibrosis survival: the factors we can't control. J Cyst Fibros 2010. [DOI: 10.1016/s1569-1993(10)60436-5] [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]
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Pinto M, Pereira L, Rodrigues T, Barreto C. Cystic fibrosis in Portugal: a survival study. J Cyst Fibros 2010. [DOI: 10.1016/s1569-1993(10)60437-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Fermeiro J, Castanhinha S, Pereira L, Barreto C. Long term impact of azithromycin in paediatric cystic fibrosis patients. J Cyst Fibros 2009. [DOI: 10.1016/s1569-1993(09)60259-9] [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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López-Piñeiro A, Albarrán A, Nunes JMR, Barreto C. Short and medium-term effects of two-phase olive mill waste application on olive grove production and soil properties under semiarid mediterranean conditions. BIORESOURCE TECHNOLOGY 2008; 99:7982-7987. [PMID: 18462936 DOI: 10.1016/j.biortech.2008.03.051] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2008] [Revised: 03/18/2008] [Accepted: 03/22/2008] [Indexed: 05/26/2023]
Abstract
A five-year field study was conducted to evaluate the potential use of oiled and de-oiled two-phase olive mill waste (TPOMW and DTPOMW, respectively) as soil amendment on a representative olive grove soil: a Cutanic Luvisol. Treatments included a non-amended control, TPOMW1, TPOMW2, DTPOMW1 and DTPOMW2 (30, 60, 27 and 54Mgha(-1) dry weight equivalent). Significant increases (P<0.05) in organic carbon, total N, available P and K, and aggregate stability were observed in the amended soils. Leaf analysis showed significant increases in N, P, and K concentrations in treated plots after the two first years of TPOMW or DTPOMW amendments. Also, a general increase in olive production was observed in the treated plots, this increase being higher in the TPOMW1 and DTPOMW1 treated soils. After five years of repeated TPOMW and DTPOMW application, the increase in yield was 29%, 9.8%, 30%, and 19% for TPOMW1, TPOMW2, DTPOMW1, and DTPOMW2, respectively. Raw TPOMW and DTPOMW have the potential to be valuable soil amendments and source of organic matter, with a positive effect on olive yield, and closing the cycle of residues-resources.
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Reis P, Fermeiro J, Castanhinha S, Rodrigues T, Pereira L, Barreto C. Clinical difference between cystic fibrosis patients colonized with different bacteria. J Cyst Fibros 2008. [DOI: 10.1016/s1569-1993(08)60222-2] [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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Castanhinha S, Reis P, Fermeiro J, Pereira L, Barreto C. Experience of inhaled tobramycin: impact in microbiological and clinical parameters in patients with cystic fibrosis. J Cyst Fibros 2008. [DOI: 10.1016/s1569-1993(08)60139-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Pereira L, Silva-Costa C, Pinto F, Barreto C, Ramirez M, Melo-Cristino J. Classical criteria for chronic infection predict the maintenance of the same Staphylococcus aureus strain in cystic fibrosis patients. J Cyst Fibros 2008. [DOI: 10.1016/s1569-1993(08)60167-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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39
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Fermeiro J, Reis P, Castanhinha S, Pereira L, Barreto C. Methicillin-resistant Staphylococcus aureus infection – what impact in cystic fibrosis patients morbidity? J Cyst Fibros 2008. [DOI: 10.1016/s1569-1993(08)60172-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Amaral MD, Pacheco P, Beck S, Farinha CM, Penque D, Nogueira P, Barreto C, Lopes B, Casals T, Dapena J, Gartner S, Vásquez C, Pérez-Frías J, Olveira C, Cabanas R, Estivill X, Tzetis M, Kanavakis E, Doudounakis S, Dörk T, Tümmler B, Girodon-Boulandet E, Cazeneuve C, Goossens M, Blayau M, Verlingue C, Vieira I, Féréc C, Claustres M, des Georges M, Clavel C, Birembaut P, Hubert D, Bienvenu T, Adoun M, Chomel JC, De Boeck K, Cuppens H, Lavinha J. Cystic fibrosis patients with the 3272-26A>G splicing mutation have milder disease than F508del homozygotes: a large European study. J Med Genet 2001; 38:777-83. [PMID: 11732487 PMCID: PMC1734751 DOI: 10.1136/jmg.38.11.777] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Luppi CG, Eluf-Neto J, Sabino E, Buccheri V, Barreto C, Ungaro AB. Late diagnosis of HIV infection in women seeking counseling and testing services in São Paulo, Brazil. AIDS Patient Care STDS 2001; 15:391-7. [PMID: 11483166 DOI: 10.1089/108729101750301942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We investigated whether women positive for human immunodeficiency virus (HIV) infection were late in seeking an anonymous HIV counseling and testing service, and the factors associated with a low CD4 count, in São Paulo, Brazil. Seventy-one consecutive HIV-1-seropositive women were interviewed by means of a structured questionnaire. Blood samples were collected for CD4+ T-lymphocytes count and determination of HIV-1 subtypes. Hepatitis C, syphilis, human T-cell lymphotrophic virus type I (HTLV-I), and HTLV-II infections were assessed by serologic tests. More than 70% of the women had less than 500 CD4+ cells/mm3 (20% below 200). Low CD4 count was significantly associated with sex work history, condom use in the last 6 months, and seropositivity to HTLV-I and syphilis. There was no relation between low CD4 count and HIV-1 subtypes. These results indicate that in Sao Paulo many women are seeking an anonymous testing service late in the course of HIV infection. The main purposes of anonymous HIV testing services - early diagnosis of infection, and counseling to prevent infection - are not being achieved. Another strategy for reducing the interval between infection and diagnosis in women must be addressed.
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Casals T, Pacheco P, Barreto C, Giménez J, Ramos MD, Pereira S, Pinheiro JA, Cobos N, Curvelo A, Vázquez C, Rocha H, Séculi JL, Pérez E, Dapena J, Carrilho E, Duarte A, Palacio AM, Nunes V, Lavinha J, Estivill X. Missense mutation R1066C in the second transmembrane domain of CFTR causes a severe cystic fibrosis phenotype: study of 19 heterozygous and 2 homozygous patients. Hum Mutat 2000; 10:387-92. [PMID: 9375855 DOI: 10.1002/(sici)1098-1004(1997)10:5<387::aid-humu9>3.0.co;2-c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We report the clinical features of 21 unrelated cystic fibrosis (CF) patients from Portugal and Spain, who carry the mutation R1066C in the CFTR gene. The current age of the patients was higher in the R1066C/any mutation group (P < 0.01), as compared to the deltaF508/deltaF508 group. Poor values for lung radiological involvement (Chrispin-Norman) and general status (Shwachman-Kulcycki) were observed in the R1066C/any mutation group (P < 0.005 and P < 0.0004). A slightly, but not significantly worse lung function was found in the R1066C/any mutation group when compared with the deltaF508/deltaF508 patients. No significant differences were detected regarding the age at diagnosis, sweat Cl-values, or percentiles of height and weight between the two groups. Neither were significant differences observed regarding sex, meconium ileus (4.7% vs. 11.1%), dehydration (10.5% vs. 14.7%), or pancreatic insufficiency (PI) (100% vs. 97.8%). The proportion of patients with lung colonization by bacterial pathogens was slightly, but not significantly higher in the R1066C/any mutation group (70.0%), as compared with the deltaF508/deltaF508 group (57.5%). Other clinical complications were significantly more frequent in the R1066C/any mutation patients(P < 0.02) than in the deltaF508/deltaF508 group. The two homozygous R1066C/R1066C patients died at the ages of 3 months and 7 years. The data presented in this study clearly demonstrate that the R1066C mutation is responsible for a severe phenotype similar to that observed in homozygous deltaF508 patients. The poor clinical scores and complications of patients with the R1066C mutation are probably related to their slightly longer survival.
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Richau JA, Leitão JH, Correia M, Lito L, Salgado MJ, Barreto C, Cescutti P, Sá-Correia I. Molecular typing and exopolysaccharide biosynthesis of Burkholderia cepacia isolates from a Portuguese cystic fibrosis center. J Clin Microbiol 2000; 38:1651-5. [PMID: 10747161 PMCID: PMC86514 DOI: 10.1128/jcm.38.4.1651-1655.2000] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
This work describes the first epidemiological survey of Burkholderia cepacia involved in pulmonary infections among the Portuguese population with cystic fibrosis (CF) who attended the major CF treatment Center in Lisbon at Sta. Maria Hospital from 1995 to the end of 1997. The characterization of the genomic relatedness of the isolates was based on the analysis of their ribopatterns (with EcoRI) followed by construction of a ribotype-based phylogenetic tree. This study was complemented with macrorestriction fragment analysis by pulsed-field gel electrophoresis. After optimization of the solid growth medium, we found that exopolysaccharide (EPS) production by B. cepacia CF isolates is not as rare a phenomenon as was thought before; indeed, 70% of the isolates examined were EPS producers.
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Beck S, Penque D, Garcia S, Gomes A, Farinha C, Mata L, Gulbenkian S, Gil-Ferreira K, Duarte A, Pacheco P, Barreto C, Lopes B, Cavaco J, Lavinha J, Amaral MD. Cystic fibrosis patients with the 3272-26A-->G mutation have mild disease, leaky alternative mRNA splicing, and CFTR protein at the cell membrane. Hum Mutat 1999; 14:133-44. [PMID: 10425036 DOI: 10.1002/(sici)1098-1004(1999)14:2<133::aid-humu5>3.0.co;2-t] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We characterized the 3272-26A-->G mutation in the cystic fibrosis transmembrane conductance regulator (CFTR) gene, creating an alternative acceptor splice site in intron 17a, that competes with the normal one, although we predict from consensus values, with lower efficiency. We analyzed five Cystic Fibrosis (CF) Portuguese patients with the 3272-26A-->G/F508del genotype. Besides clinical and haplotype characterization of those patients, we report here results from CFTR transcript analysis in nasal brushings from all five patients. RT-PCR analysis supports alternative splicing in all patients and carriers, but not in controls. By sequencing, we determined that the alternative transcript includes 25 nucleotides from intron 17a, which predictively cause frameshift and a premature stop codon. The use of this alternative splice site causes a reduction in the levels of normal transcripts from the allele with this mutation and, most probably, of normal protein as well. By immunocytochemistry of both epithelial primary cell cultures and slices from CF polyps, CFTR protein is detected at the cell membrane, with three different antibodies. Ussing chamber analysis of one nasal polyp shows a high sodium absorption, characteristic of CF. Altogether, the results suggest that the main defect caused by the 3272-26A-->G mutation is a reduction in normal CFTR transcripts and protein and therefore this mutation should be included in class V, according to Zielenski and Tsui.
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Casals T, Pacheco P, Barreto C, Giménez J, Ramos M, Pereira S, Pinheiro J, Cobos N, Curvelo A, Vázquez C, Rocha H, Séculi J, Pérez E, Dapena J, Carrilho E, Duarte A, Palacio A, Nunes V, Lavinha J, Estivill X. Missense mutation R1066C in the second transmembrane domain of CFTR causes a severe cystic fibrosis phenotype: Study of 19 heterozygous and 2 homozygous patients. Hum Mutat 1997. [DOI: 10.1002/(sici)1098-1004(1997)10:5<387::aid-humu9>3.3.co;2-v] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Wilsman NJ, Farnum CE, Leiferman EM, Fry M, Barreto C. Differential growth by growth plates as a function of multiple parameters of chondrocytic kinetics. J Orthop Res 1996; 14:927-36. [PMID: 8982136 DOI: 10.1002/jor.1100140613] [Citation(s) in RCA: 195] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Differential elongation of growth plates is the process by which growth-plate chondrocytes translate the same sequence of gene regulation into the appropriate timing pattern for a given rate of elongation. While some of the parameters associated with differential growth are known, the purpose of this study was to test the hypothesis that eight independent variables are involved. We tested this hypothesis by considering four different growth plates in 28-day-old Long-Evans rats. Temporal parameters were provided by means of oxytetracycline and bromodeoxyuridine labeling techniques. Stereological parameters were measured with standard techniques. For all four growth plates, the calculated number of new chondrocytes produced per day approximated the number of chondrocytes lost per day at the chondro-osseous junction. This suggests that the proposed equations and associated variables represent a comprehensive set of variables defining differential growth. In absolute numbers, the proximal tibial growth plate produced about four times as many chondrocytes per day as the proximal radial growth plate (16,400 compared with 3,700). In the proximal tibia, 9% of growth is contributed by cellular division; 32%, by matrix synthesis throughout the growth plate; and 59%, by chondrocytic enlargement during hypertrophy. In the more slowly elongating growth plates, the relative contribution to elongation from cellular enlargement decreases from 59 to 44%, with a relative increase in contribution from matrix synthesis ranging from 32% in the proximal tibia 49% in the proximal radius. This study suggests that differential growth is best depicted as a complex interplay among cellular division, matrix synthesis, and cellular enlargement during hypertrophy. Differential growth is best explained by considering a set of eight independent variables, seven of which vary from growth plate to growth plate. Thus, this study confirms the importance of cellular hypertrophy during elongation and adds to our understanding of the importance of locally mediated regulatory systems controlling growth-plate activity.
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Da Silva LC, Madruga CL, Carrilho FJ, Pinho JR, Saéz-Alquezar A, Santos C, Bassit L, Barreto C, Fonseca LE, Alves VA, Leitão R, Vianna R, Cardoso RA, França AV, Gayotto LC. Spontaneous hepatitis B surface antigen clearance in a long-term follow-up study of patients with chronic type B hepatitis. Lack of correlation with hepatitis C and D virus superinfection. J Gastroenterol 1996; 31:696-701. [PMID: 8887037 DOI: 10.1007/bf02347619] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We investigated the frequency of HBsAg clearance and the possible role of viral superinfection in a long-term follow-up of 184 patients with chronic hepatitis B (CHB). Our subjects were 184 patients with chronic hepatitis B and the follow-up was 12-216 months (mean 66.2 +/- 53.7 months). The investigative methods used were: immunoenzymatic assays for HBV, HCV, HDV, and HIV markers; polymerase chain reaction (PCR) for HBV DNA; and liver biopsy and immunoperoxidase. During the follow-up, 20 of the 184 patients cleared serum HBsAg. A comparison of patients with persistent HBsAg(group I) and of those who cleared this marker (group II) showed a significant difference in mortality (P = 0.002) between the two groups and a tendency to a more severe exacerbation (flare) in group II (P = 0.07). Antibodies to hepatitis C and D virus as well as antibodies to HIV were equally distributed in both groups. Thirteen patients (7.9%) from group I, but none from group II, subsequently developed hepatocellular carcinoma. These results suggest that the frequency of spontaneous clearance of HBsAg during chronic HBV infection is low. No determinant factor for the clearance was found, including the presence of liver cirrhosis. Serum HBV DNA was undetectable by PCR after clearance in 16 out of 17 patients.
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Duarte A, Amaral M, Barreto C, Pacheco P, Lavinha J. Complex cystic fibrosis allele R334W-R1158X results in reduced levels of correctly processed mRNA in a pancreatic sufficient patient. Hum Mutat 1996; 8:134-9. [PMID: 8844211 DOI: 10.1002/(sici)1098-1004(1996)8:2<134::aid-humu5>3.0.co;2-b] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
CFTR alleles containing two mutations have been very rarely found in cystic fibrosis (CF) patients. They provide an opportunity to study the effect of two in cis-interacting gene defects on gene expression. Here, we describe a three-generation CF family with a complex CFTR allele that has not been previously described, containing the missense mutation R334W in exon 7 and the nonsense mutation R1158X in exon 19. Lymphocyte RNA analysis showed that (1) the mRNA corresponding to the complex allele is present although at markedly reduced levels; and (2) the nonsense mutation does not lead to detectable skipping of exon 19. The clinical picture of the patients with the genotype R334W-R1158X/delta F508 is characterized by pancreatic sufficiency and an atypical course of the disease.
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Abstract
In growing mammals there is a positive linear relationship between the mean hypertrophic chondrocyte volume and the rate of bone elongation. This suggests that the control of chondrocytic volume in the growth plate, is a major determinant in controlling bone elongation in mammals. In the present study the existence of such a relationship was tested for in birds. A scheme of fluorochrome labelling was devised to enable direct measurement of bone elongation per unit time. Four weight-bearing growth plates from two-week-old mallard ducklings and the corresponding four growth plates from two-week-old leghorn chicks were studied. Growth plate cartilage was fixed in the presence of ruthenium hexamine trichloride and embedded in Epon araldite. Estimates of mean cell volume, v(chondr), and mean cubic intercept (l3) were calculated by applying the stereological relationship: v(chondr) = (pi/3) x (l3). Regression analysis revealed a positive linear relationship between the two parameters, rate of bone elongation and mean hypertrophic cell volume in both species (squared correlation statistics: 65 per cent for mallards, 54 per cent for leghorns). There was a wide range in rates of bone elongation among growth plates studied (318 to 1418 microns 24 h-1 for mallards, 77 to 445 microns 24 h-1 for leghorns) and compared to mammals (such as rabbits, rats, swine and dogs), a small range in mean cell volume (2709 to 4786 micron3 for mallards, 3663 to 5719 micron3 for leghorns).(ABSTRACT TRUNCATED AT 250 WORDS)
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