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1.
Dis Esophagus ; 33(1)2020 Jan 16.
Artigo em Inglês | MEDLINE | ID: mdl-31778151

RESUMO

The radial distribution of esophago-gastric junction (EGJ) pressures with regard to troublesome dysphagia (TDysph) after antireflux surgery is poorly understood. Before and after antireflux surgery, end-expiratory and peak-inspiratory EGJ pressures were measured at eight angles of 45° radial separation in patients with reflux disease. All 34 patients underwent posterior crural repair, then either 90° anterior (N = 13) or 360° fundoplication (N = 21). Dysphagia was assessed prospectively using a validated questionnaire (score range 0-45) and TDysph defined as a dysphagia score that was ≥5 above pre-op baseline. Compared with before surgery, for 90° fundoplication, end-expiratory EGJ pressures were highest in the left-anterolateral sectors, the position of the partial fundoplication. In other sectors, pressures were uniformly elevated. Compared with 90° fundoplication, radial pressures after 360° fundoplication were higher circumferentially (P = 0.004), with a posterior peak. Nine patients developed TDysph after surgery with a greater increase in end-expiratory and peak-inspiratory EGJ pressures (P = 0.03 and 0.03, respectively) and significantly higher inspiratory pressure at the point of maximal radial pressure asymmetry (P = 0.048), compared with 25 patients without TDysph. Circumferential elevation of end-expiratory EGJ pressure after 90° and 360° fundoplication suggests hiatal repair elevates EGJ pressure by extrinsic compression. The highly localized focal point of elevated EGJ pressure upon inspiration in patients with TDysph after surgery is indicative of a restrictive diaphragmatic hiatus in the presence of a fundoplication.


Assuntos
Transtornos de Deglutição/etiologia , Fundoplicatura/efeitos adversos , Refluxo Gastroesofágico/cirurgia , Herniorrafia/efeitos adversos , Complicações Pós-Operatórias/etiologia , Adulto , Idoso , Transtornos de Deglutição/patologia , Junção Esofagogástrica/patologia , Feminino , Refluxo Gastroesofágico/etiologia , Refluxo Gastroesofágico/patologia , Hérnia Hiatal/complicações , Hérnia Hiatal/patologia , Hérnia Hiatal/cirurgia , Humanos , Masculino , Manometria , Pessoa de Meia-Idade , Complicações Pós-Operatórias/patologia , Pressão , Estudos Prospectivos , Adulto Jovem
2.
Dis Esophagus ; 29(2): 166-73, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-25515292

RESUMO

Pressure-flow analysis quantifies the interactions between bolus transport and pressure generation. We undertook a pilot study to assess the interrelationships between pressure-flow metrics and fluoroscopically determined bolus clearance and bolus transport across the esophagogastric junction (EGJ). We hypothesized that findings of abnormal pressure-flow metrics would correlate with impaired bolus clearance and reduced flow across the EGJ. Videofluoroscopic images, impedance, and pressure were recorded simultaneously in nine patients with dysphagia (62-82 years, seven male) tested with liquid barium boluses. A 3.6 mm diameter solid-state catheter with 25 × 1 cm pressure/12 × 2 cm impedance was utilized. Swallowed bolus clearance was assessed using a validated 7-point radiological bolus transport scale. The cumulative period of bolus flow across the EGJ was also fluoroscopically measured (EGJ flow time). Pressure only parameters included the length of breaks in the 20 mmHg iso-contour and the 4 second integrated EGJ relaxation pressure (IRP4s). Pressure-flow metrics were calculated for the distal esophagus, these were: time from nadir impedance to peak pressure (TNadImp to PeakP) to quantify bolus flow timing; pressure flow index (PFI) to integrate bolus pressurization and flow timing; and impedance ratio (IR) to assess bolus clearance. When compared with controls, patients had longer peristaltic breaks, higher IRs, and higher residual EGJ relaxation pressures (break length of 8 [2, 13] vs. 2 [0, 2] cm, P = 0.027; IR 0.5 ± 0.1 vs. 0.3 ± 0.0, P = 0.019; IRP4s 11 ± 2 vs. 6 ± 1 mmHg, P = 0.070). There was a significant positive correlation between higher bolus transport scores and longer peristaltic breaks (Spearman correlation r = 0.895, P < 0.001) and with higher IRs (r = 0.661, P < 0.05). Diminished EGJ flow times correlated with a shorter TNadImp to PeakP (r = -0.733, P < 0.05) and a higher IR (r = -0.750, P < 0.05). Longer peristaltic breaks and higher IR correlate with failed bolus clearance on videofluoroscopy. The metric TNadImp to PeakP appears to be a marker of the period of time over which the bolus flows across the EGJ.


Assuntos
Transtornos de Deglutição/diagnóstico por imagem , Junção Esofagogástrica/diagnóstico por imagem , Esôfago/diagnóstico por imagem , Fluoroscopia/métodos , Peristaltismo/fisiologia , Idoso , Idoso de 80 Anos ou mais , Deglutição/fisiologia , Transtornos de Deglutição/fisiopatologia , Impedância Elétrica , Junção Esofagogástrica/fisiopatologia , Esôfago/fisiopatologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Pressão
3.
Br J Surg ; 98(10): 1414-21, 2011 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-21647868

RESUMO

BACKGROUND: Laparoscopic 360° fundoplication is the most common operation for gastro-oesophageal reflux disease, but is associated with postoperative dysphagia in some patients. Patients with ineffective oesophageal motility may have a higher risk of developing postoperative dysphagia, but this remains unclear. METHODS: From 1991 to 2010, 2040 patients underwent primary laparoscopic fundoplication for gastro-oesophageal reflux disease and met the study inclusion criteria; 343 had a 90°, 498 a 180° and 1199 a 360° fundoplication. Primary peristalsis and distal contraction amplitude during oesophageal manometry were determined for 1354 patients. Postoperative dysphagia scores (range 0-45) were recorded at 3 and 12 months, then annually. Oesophageal dilatations and/or reoperations for dysphagia were recorded. RESULTS: Preoperative oesophageal motility did not influence postoperative dysphagia scores, the need for dilatation and/or reoperation up to 6 years. Three-month dysphagia scores were lower after 90° and 180° compared with 360° fundoplication (mean(s.e.m.) 8·0(0·6) and 9·8(0·5) respectively versus 11·9(0·4); P < 0·001 and P = 0·003), but these differences diminished after 6 years of follow-up. The incidence of dilatation and reoperation for dysphagia was lower after 90° (2·6 and 0·6 per cent respectively) and 180° (4·4 and 1·0 per cent) fundoplications than with a 360° wrap (9·8 and 6·8 per cent; both P < 0·001 versus 90° and 180° groups). CONCLUSION: Tailoring the degree of fundoplication according to preoperative oesophageal motility by standard manometric parameters has no long-term impact on postoperative dysphagia. There is, however, a proportionate increase in short-term dysphagia scores with increasing degree of wrap, and a corresponding proportionate increase in dilatations and reoperations for dysphagia. These differences in dysphagia scores diminish with time.


Assuntos
Transtornos da Motilidade Esofágica/etiologia , Esofagostomia/métodos , Fundoplicatura/métodos , Refluxo Gastroesofágico/cirurgia , Complicações Pós-Operatórias/etiologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Dilatação/métodos , Feminino , Humanos , Estimativa de Kaplan-Meier , Masculino , Manometria , Pessoa de Meia-Idade , Reoperação/estatística & dados numéricos , Falha de Tratamento , Adulto Jovem
4.
Br J Surg ; 96(4): 391-7, 2009 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-19283739

RESUMO

BACKGROUND: A small proportion of patients who have laparoscopic antireflux procedures require revisional surgery. This study investigated long-term clinical outcomes. METHODS: Patients requiring late revisional surgery following laparoscopic fundoplication for gastro-oesophageal reflux were identified from a prospective database. Long-term outcomes were determined using a questionnaire evaluating symptom scores for heartburn, dysphagia and satisfaction. RESULTS: The database search found 109 patients, including 98 (5.6 per cent) of 1751 patients who had primary surgery in the authors' unit. Indications for surgical revision were dysphagia (52 patients), recurrent reflux (36), mechanical symptoms related to paraoesophageal herniation (16) and atypical symptoms (five). The median time to revision was 26 months. Outcome data were available for 104 patients (median follow-up 66 months) and satisfaction data for 102, 88 of whom were highly satisfied (62.7 per cent) or satisfied (23.5 per cent) with the outcome. Patients who had revision for dysphagia had a higher incidence of poorly controlled heartburn (20 versus 2 per cent; P = 0.004), troublesome dysphagia (16 versus 6 per cent; P = 0.118) and a lower satisfaction score (P = 0.023) than those with recurrent reflux or paraoesophageal herniation. CONCLUSION: Revisional surgery following laparoscopic fundoplication can produce good long-term results, but revision for dysphagia has less satisfactory outcomes.


Assuntos
Fundoplicatura/métodos , Refluxo Gastroesofágico/cirurgia , Laparoscopia/métodos , Adolescente , Adulto , Idoso , Transtornos de Deglutição/etiologia , Transtornos de Deglutição/cirurgia , Azia/etiologia , Azia/cirurgia , Humanos , Masculino , Pessoa de Meia-Idade , Satisfação do Paciente , Reoperação , Resultado do Tratamento , Adulto Jovem
5.
Dis Esophagus ; 21(5): 445-51, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-19125799

RESUMO

Some patients having a 24-h pH monitoring test prior to laparoscopic fundoplication experience no symptoms at all in spite of having a positive test, and other patients experience only atypical symptoms in spite of having a positive test. This study investigates the postoperative outcome of such patients. All patients underwent esophageal manometry and 24-h esophageal pH monitoring before laparoscopic total fundoplication. Patients were divided into three groups based on their symptom profile recorded during a positive 24-h pH monitoring: those with typical symptoms (n = 104), those with atypical symptoms (n = 28) and those who experienced no symptoms at all (n = 23). The outcomes measured were heartburn score (0-10), dysphagia composite score (0-45) and satisfaction score (0-10) at 12 months after surgery. Outcome analysis reveals the heartburn scores were significantly reduced postoperatively for all groups of patients. At 1 year after surgery, there was no difference among the three groups of patients in terms of heartburn score and dysphagia composite scores, nor the experience of bloating, belching, or their willingness to repeat surgery. Despite one group experiencing no symptoms, and another group atypical symptoms during a positive pH study, the postoperative satisfaction scores for these two groups was good, but significantly less (P = 0.03, P = 0.02, respectively) than the group of patients with a typical symptom index. In conclusion, patients who experience only atypical symptoms or no symptoms at all during their preoperative positive 24-h pH monitoring may still obtain a good result from antireflux surgery. However, these symptom profiles should alert the surgeon that such patients may have an outcome which is not as good as patients who experience only typical symptoms during a pH study.


Assuntos
Monitoramento do pH Esofágico , Fundoplicatura/métodos , Refluxo Gastroesofágico/diagnóstico , Refluxo Gastroesofágico/cirurgia , Laparoscopia/métodos , Adulto , Estudos de Coortes , Transtornos de Deglutição/fisiopatologia , Feminino , Seguimentos , Azia/fisiopatologia , Humanos , Laparoscopia/efeitos adversos , Masculino , Manometria , Pessoa de Meia-Idade , Satisfação do Paciente , Cuidados Pós-Operatórios/métodos , Cuidados Pré-Operatórios/métodos , Probabilidade , Estudos Retrospectivos , Medição de Risco , Índice de Gravidade de Doença , Estatísticas não Paramétricas , Resultado do Tratamento
6.
J Clin Invest ; 72(4): 1262-7, 1983 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-6313757

RESUMO

One cloned complementary DNA and one genomic subclone were used to detect restriction fragment length polymorphism associated with the pro alpha 2(I) gene for human type I procollagen. The restriction fragments obtained from examination of 30-122 chromosomes confirmed previous indications that the pro alpha 2(I) gene is found in a single copy in the human haploid genome. One highly polymorphic site was detected with EcoRI in the 5'-half of the gene. The restriction site polymorphism at the site had an allelic frequency of 0.38, and it generated two fragments of 10.5 and 3.5 kilobase in homozygous individuals. The restriction fragment length polymorphism generated at the EcoRI site was used to study affected and non-affected individuals in four generations of a family with an autosomal dominant form of osteogenesis imperfecta. The data demonstrated a linkage of the phenotype to a pro alpha 2(I) allele with a lod score of 2.41 at a recombination fraction (theta) of 0. The data therefore provided presumptive evidence that osteogenesis imperfecta in this family is caused by a mutation in the pro alpha 2(I) gene or some contiguous region of the genome. The relatively high frequency of polymorphism at the EcoRI site makes it useful for studying a broad range of genetic disorders in which mutations in type I procollagen are suspected. In addition, the polymorphic site should provide useful markers for linkage studies with other loci located on human chromosome 7.


Assuntos
Enzimas de Restrição do DNA , Osteogênese Imperfeita/genética , Polimorfismo Genético , Pró-Colágeno/genética , Desoxirribonuclease EcoRI , Feminino , Genes Dominantes , Humanos , Leucócitos/análise , Masculino , Osteogênese Imperfeita/diagnóstico , Linhagem , Pró-Colágeno/sangue
7.
Biochim Biophys Acta ; 1132(3): 325-8, 1992 Oct 20.
Artigo em Inglês | MEDLINE | ID: mdl-1420316

RESUMO

A cDNA library, constructed from bovine heart endothelial cell poly(A)+ RNA, was screened using a BstXI fragment of human von Willebrand and factor (vWF) cDNA as a probe. This probe codes for the major adhesion domain of vWF that includes the GPIb, collagen and heparin binding domains. Of the ten positive clones obtained, a clone that spanned the region of interest was sequenced by the dideoxynucleotide method yielding a sequence of 1550 bp. This region of the bovine cDNA codes for amino acids corresponding to #262 to #777 in human vWF and encompasses the entire pro adhesion domain. Both the nucleotide sequence and the deduced amino acid sequence are 82% homologous to those of human vWF. Cysteine residues #471, 474, 509 and 695, which form intrachain bonds in human vWF, are also present in the bovine vWF sequence.


Assuntos
Fator de von Willebrand/genética , Sequência de Aminoácidos , Animais , Sequência de Bases , Bovinos , Adesão Celular/genética , DNA , Humanos , Dados de Sequência Molecular , Homologia de Sequência de Aminoácidos
8.
J Mol Biol ; 193(1): 127-43, 1987 Jan 05.
Artigo em Inglês | MEDLINE | ID: mdl-3586016

RESUMO

The sequences of the carboxy-terminal extensions (COOH-propeptides) of at least one chain of all of the major human procollagens have only recently been deduced, and include those of the interstitial (alpha 1(I), alpha 2(I), alpha 1(II), alpha 1(III)), basement membrane (alpha 1(IV)) and pericellular (alpha 2(V)) procollagens. Comparisons of DNA and protein sequences, corresponding to these COOH-propeptides domains, established the early divergence of the basement membrane alpha 1(IV) COOH-propeptide from the corresponding sequences of the interstitial and pericellular procollagens. The latter are relatively highly conserved and share 58% primary peptide sequence similarities, whereas sequence similarities relative to alpha 1(IV) are limited. Hydropathy profiles and secondary structure potentials further emphasize the clustering of conserved and variable regions among the interstitial and pericellular COOH-propeptides, and provided further evidence for significant structural differences between these sequences and the alpha 1(IV) COOH-propeptide. The most highly conserved sequences of the alpha 1(I), alpha 2(I), alpha 1(II), alpha 1(III) and alpha 2(V) COOH-propeptides include regions surrounding the carbohydrate attachment site, cysteine-containing regions and the COOH-terminal sequences. Cysteinyl, tyrosyl and tryptophanyl residues were found to be highly conserved as were most charged residues. Localization of variable regions, in general, occurs within hydrophilic sequences with high beta-turn potentials that are proximal to intron/exon splice junctions. The most variable sequences are associated with the telopeptides and adjoining NH2-terminal portions of the COOH-propeptides as demonstrated by predictive secondary structure analyses. These results, combined with similar analyses of abnormal alpha 2(I) COOH-propeptide (osteogenesis imperfecta) permitted the identification of subsequences that are likely to be a prerequisite for COOH-propeptide functions, namely procollagen chain recognition and nucleation sites for triple helix formation. These functions are also common to the alpha 1(IV) COOH-propeptide; however, the lack of cleavage of this region and its additional postulated structural role in extracellular matrix interactions likely account for its divergent primary and secondary structure.


Assuntos
Pró-Colágeno , Sequência de Aminoácidos , Sequência de Bases , Evolução Biológica , Simulação por Computador , Cisteína , Humanos , Modelos Biológicos , Mutação , Probabilidade , Conformação Proteica
9.
Endocrinology ; 120(4): 1403-10, 1987 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-3830055

RESUMO

A cDNA library, prepared from mRNA isolated from the uteri of 3-day estradiol-stimulated immature rats, was constructed in pBR322. From this library an estrogen-regulated clone, pERU3, was isolated. This clone contained sequences complementary to uterine mRNA that migrated during gel electrophoresis as a double band of about 5.0 and 5.8 kilobases. Little of this mRNA was seen in several other tissues examined. An increase in the amount of this RNA in uterus was seen 2 h after estradiol treatment, with maximum hybridization occurring, in different experiments, between 18 and 36 h, followed by a decline. Hybridization of the cDNA insert of the pERU3 plasmid with known probes indicated that it coded for alpha 1(I)-procollagen. This conclusion was supported by in vitro translation experiments in which the hybrid-selected mRNA complementary to pERU3 DNA was shown to code for a collagenase-sensitive protein with a size corresponding to that of alpha 1(I)-procollagen. This system, therefore, provides an additional tool for the study of the estrogen regulation of gene expression in the uterus.


Assuntos
Estradiol/farmacologia , Pró-Colágeno/genética , RNA Mensageiro/metabolismo , Útero/metabolismo , Animais , Clonagem Molecular , DNA/genética , Feminino , Peso Molecular , Hibridização de Ácido Nucleico , Biossíntese de Proteínas , Ratos , Ratos Endogâmicos , Útero/efeitos dos fármacos
10.
Matrix Biol ; 18(5): 481-6, 1999 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-10601735

RESUMO

Chicken alpha1(V) collagen cDNAs have been cloned by a variety of methods and positively identified. We present here the entire translated sequence of the chick polypeptide and compare selected regions to other collagen chains in the type V/XI family.


Assuntos
Colágeno/química , Colágeno/genética , Sequência de Aminoácidos , Animais , Galinhas , Clonagem Molecular , DNA Complementar/genética , Humanos , Dados de Sequência Molecular , Precursores de Proteínas/química , Precursores de Proteínas/genética , Homologia de Sequência de Aminoácidos , Especificidade da Espécie
11.
Gene ; 123(2): 211-7, 1993 Jan 30.
Artigo em Inglês | MEDLINE | ID: mdl-7916703

RESUMO

Human collagen (COL) cDNA clones were isolated from a library representing transcripts synthesized by an established rhabdomyosarcoma (RH) cell line. The 0.6-kb insert of the first isolate encodes a discontinuous collagenous sequence not homologous to type I-XVI COL chains. Sequencing of a second clone with a 4-kb insert revealed an open reading frame (ORF) of 2154 nucleotides. The deduced amino acid (aa) sequence begins with an 186-aa noncollagenous region containing seven cysteines (Cys). Several of the Cys and surrounding aa residues can be aligned with those in type XVI, XII and IX COL. Due to the presence of two long interruptions, the 524-aa collagenous region is separated into three subdomains that each have smaller interruptions of 1-6 aa. The protein terminates with an 8-aa noncollagenous peptide including an unusual single Cys which would be expected to form an interchain disulfide bond. Results of Northern blot hybridization suggest that the new COL chain may be uncommonly large since the clone identified a low-abundance RNA at least 12.4 kb in size. The gene coding for RH COL is located on human chromosome 6. It is now important to elucidate the role of this unusual COL in the infrastructure of extracellular matrix.


Assuntos
Colágeno/genética , Sequência de Aminoácidos , Sequência de Bases , Mapeamento Cromossômico , Cromossomos Humanos Par 6 , Clonagem Molecular , Biblioteca Gênica , Humanos , Dados de Sequência Molecular , Peso Molecular , Estrutura Secundária de Proteína , Homologia de Sequência de Aminoácidos
12.
Neurology ; 30(8): 884-6, 1980 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-6158021

RESUMO

Radioactive-labeled complementary DNA (cDNA) probes specific for either poliovirus type I or type II were hybridized with cellular RNA from the brains of patients dying of amyotrophic lateral sclerosis. In 11 brains examined, the percentage of hybridization for either polio type was the same as the percentage in normal brains. Although hybridization is a sensitive method for detection of viral genome material in infected cells, inability to detect viral nucleic acid by current techniques does not preclude the presence of viral genetic material in the tissue examined.


Assuntos
Esclerose Lateral Amiotrófica/microbiologia , DNA Viral/análise , Hibridização de Ácido Nucleico , Poliovirus , Esclerose Lateral Amiotrófica/etiologia , Encéfalo/metabolismo , Córtex Cerebral/microbiologia , Humanos , Poliomielite/complicações , RNA/análise , Medula Espinal/microbiologia
13.
Am J Surg Pathol ; 21(1): 109-13, 1997 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-8990147

RESUMO

Goblet cell carcinoid (GCC) is a rare but distinctive neoplasm with features of both adenocarcinoma and carcinoid tumor. Most cases described in the literature have occurred in the appendix. An additional well-defined location is the ovary, and these tumors have been associated with a mature teratoma of the ovary. GCC arising within a mature teratoma of the mediastinum has not been described in the English-language literature. We report a case of this previously undescribed entity and provide a review of the literature on mediastinal teratomas with malignant transformation. The histologic findings included uniform, smooth-bordered glandular nests lined by goblet cells and admixed endocrine and Paneth cells. Occasional tubular glands were present, as were transitional type glands with both goblet cell and tubular features. Cytologic atypia was minimal, and mitotic activity was rare. Immunohistochemical studies showed positive staining of GCC tumor cells with chromogranin, cytokeratin, neuron-specific enolase, serotonin (focal), and Leu-7 (focal). The GCC component was entirely contained within the mature teratoma.


Assuntos
Tumor Carcinoide/patologia , Neoplasias do Mediastino/patologia , Neoplasias Primárias Múltiplas/patologia , Teratoma/patologia , Humanos , Masculino , Pessoa de Meia-Idade
14.
Am J Med Genet ; 19(3): 607-22, 1984 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-6507506

RESUMO

Ehlers-Danlos syndrome type IV (EDS IV) is characterized by variable changes in the skin, arterial fragility, bowel perforation, minimal joint involvement, and either autosomal recessive or autosomal dominant inheritance. The unifying biochemical abnormality is a deficiency of type III collagen; all patients studied thus far have shown a defect in either synthesis or in secretion of type III procollagen. We report on an adolescent boy who inherited EDS IV from his father and who developed a spontaneous subclavian artery aneurysm. In vitro studies of collagen production in dermal fibroblasts showed normal amounts of pro alpha 1 (III) messenger RNA and synthesis and secretion of nearly equal amounts of normal and of structurally abnormal pro alpha 1 (III) monomers. This patient is biochemically distinct from previous cases of EDS IV and is likely heterozygous for a mutation that results in an aberrant type III procollagen that is particularly susceptible to protease degradation.


Assuntos
Síndrome de Ehlers-Danlos/genética , Pró-Colágeno/genética , Adolescente , Aneurisma/genética , Células Cultivadas , Síndrome de Ehlers-Danlos/metabolismo , Genes Dominantes , Humanos , Masculino , Linhagem , Pró-Colágeno/metabolismo , Pele/metabolismo
15.
Hum Pathol ; 31(3): 359-66, 2000 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-10746680

RESUMO

In situ carcinomas must penetrate their own basement membrane to be classified as invasive, and subsequently infiltrate surrounding connective tissue and cross vascular basement membranes to metastasize hematogenously. Accordingly, in many studies, integral basement membrane components, including type IV collagen, laminin, and heparan sulfate proteoglycan, have been localized in a spectrum of tumors to gain insight into their role in neoplasia. A number of recently identified extracellular matrix molecules and isoforms of the aforementioned proteins have been localized to the basement membrane zone, illustrating another level of biochemical heterogeneity in these structures. As the complexity of these matrices becomes more apparent, their roles in maintaining homeostasis and in tumor biology falls into question. Of the new group of collagens localized to the basement membrane zone, type XV was the first to be characterized (Cell Tissue Res, 286:493-505, 1996). This nonfibrillar collagen has a nearly ubiquitous distribution in normal human tissues via a strong association with basement membrane zones, suggesting that it functions to adhere basement membrane to the underlying stroma. To begin investigation of this protein in malignant tumors, we have localized type XV in human colonic adenocarcinomas and compared its distribution with that of type IV collagen and laminin. Collagens XV and IV and laminin were found in all normal and colonic epithelial, muscle, fat, neural, and vascular basement membrane zones, as shown previously. In moderately differentiated, invasive adenocarcinomas, laminin and type IV collagen were sometimes observed as continuous, linear deposits around some of the malignant glands, but more often they were seen in either discontinuous deposits or were completely absent. In contrast, type XV collagen was characterized as virtually absent from the basement membrane zones of malignant glandular elements in moderately differentiated tumors. Nevertheless there were also similarities; all 3 proteins were usually present in the stroma and adjacent vascular basement membrane zones surrounding invasive glands. The loss of type XV collagen from these malignant epithelial basement membrane zones and its increased interstitial expression suggests a role for this protein in the invasive process and the possibility that it may provide a sensitive indicator of tumor invasion.


Assuntos
Adenocarcinoma/metabolismo , Colágeno/metabolismo , Neoplasias do Colo/metabolismo , Laminina/metabolismo , Proteínas de Neoplasias/metabolismo , Adenocarcinoma/patologia , Membrana Basal/metabolismo , Colo/metabolismo , Neoplasias do Colo/patologia , Matriz Extracelular/metabolismo , Humanos , Técnicas Imunoenzimáticas , Estadiamento de Neoplasias
16.
Arch Surg ; 126(11): 1414-7, 1991 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-1747056

RESUMO

Fifty-four patients having antireflux surgery (20 fundoplication alone [group 1] and 34 fundoplication with proximal gastric vagotomy [group 2], had their gastric emptying assessed preoperatively and postoperatively. At 3 years after operation, in group 1, the emptying of a solid meal was significantly accelerated. In contrast, no such acceleration in solid emptying was observed in group 2. Liquid emptying was significantly accelerated in both groups of patients postoperatively. No consistent relationship was found between symptomatic outcome and gastric emptying in either group of patients. We conclude that proximal vagotomy interferes with reflex pathways that are involved in the acceleration of solid gastric emptying after fundoplication.


Assuntos
Esôfago/cirurgia , Esvaziamento Gástrico , Fundo Gástrico/cirurgia , Refluxo Gastroesofágico/cirurgia , Vagotomia Gástrica Proximal , Adulto , Idoso , Feminino , Seguimentos , Alimentos , Humanos , Masculino , Pessoa de Meia-Idade
17.
Arch Surg ; 126(11): 1418-22, 1991 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-1747057

RESUMO

The effects of the Angelchik prosthesis on esophageal and gastric function were investigated in 17 patients (11 men and six women; median age, 57 years; age range, 36 to 88 years) who underwent surgery for treatment of gastroesophageal reflux disease. All patients demonstrated unequivocal reflux, either at endoscopy or 24-hour pH testing. There was a significant increase in lower esophageal sphincter pressure after surgery, and no patient demonstrated abnormal reflux on pH testing. Gastric emptying of liquids and solids was not altered by surgery. Six months after surgery, all symptoms except dysphagia had significantly improved. Thirty-three months after surgery, six patients described symptoms as severe as or worse than those before surgery. Four patients had the prosthesis removed, two because of dysphagia alone, one because of reflux and dysphagia, and one because of flatulence and bloating. The patients who required removal of the prosthesis because of dysphagia had gross delay of esophageal emptying. We conclude that the Angelchik prosthesis is an effective antireflux device, but it interferes with esophageal function in some patients, requiring removal of the prosthesis. We think the rate of removal of the prosthesis is too high for its routine use in the treatment of gastroesophageal reflux disease.


Assuntos
Esôfago/fisiologia , Esvaziamento Gástrico , Refluxo Gastroesofágico/cirurgia , Próteses e Implantes , Adulto , Idoso , Idoso de 80 Anos ou mais , Transtornos de Deglutição/etiologia , Esofagoscopia , Esôfago/cirurgia , Feminino , Seguimentos , Humanos , Concentração de Íons de Hidrogênio , Masculino , Manometria , Pessoa de Meia-Idade , Próteses e Implantes/efeitos adversos , Desenho de Prótese
18.
Arch Surg ; 136(2): 180-4, 2001 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-11177138

RESUMO

HYPOTHESIS: Laparoscopic Nissen fundoplication provides long-term relief of symptoms of gastroesophageal reflux disease. DESIGN: Prospectively evaluated case series. SETTING: University teaching hospital. PATIENTS: From September 1991 to December 1999, we performed more than 900 laparoscopic antireflux procedures. The outcome for patients who underwent surgery between September 1991 and June 1994 (178 cases) was determined. This included all patients having laparoscopic Nissen fundoplication, from the first procedure onward. INTERVENTIONS: Long-term follow-up for 5 or more years after laparoscopic Nissen fundoplication was obtained by an independent investigator who interviewed patients using a structured questionnaire. MAIN OUTCOME MEASURES: Prospective evaluation of clinical symptoms using a structured questionnaire. RESULTS: Outcome data covering a period of 5 or more years after surgery was available for 176 patients (99%), with 2 patients lost to follow-up. Nine patients died (8 of unrelated causes) at some stage following surgery, and the outcome was difficult to determine in 1 patient with cerebral palsy. Hence, questionnaire data were available for 166 patients at a median follow-up of 6 years (range, 5-8 years). Three patients (1.7%) underwent revision surgery for recurrent reflux; 87% of the 176 patients remained free of significant reflux. Reoperation was required for dysphagia in 7 patients (3.9%), 2 for a tight wrap and 5 for a tight diaphragmatic hiatus. In addition, reoperation was necessary for a paraesophageal hiatus hernia in 13 patients (7.3%). Of the reoperations, 56% were performed within 12 months of the original procedure, and 22% during the second year of follow-up. Further surgery was uncommon after 2 years. The long-term outcome was considered "good or excellent" by 90% of patients. CONCLUSIONS: The long-term outcome of laparoscopic Nissen fundoplication is similar to that following open fundoplication. Good results are obtained in most patients.


Assuntos
Fundoplicatura , Laparoscopia , Seguimentos , Fundoplicatura/métodos , Fundoplicatura/estatística & dados numéricos , Refluxo Gastroesofágico/prevenção & controle , Humanos , Laparoscopia/estatística & dados numéricos , Complicações Pós-Operatórias/epidemiologia , Estudos Prospectivos , Recidiva , Reoperação/estatística & dados numéricos , Inquéritos e Questionários , Fatores de Tempo , Resultado do Tratamento
19.
Ann Thorac Surg ; 61(6): 1832-3, 1996 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-8651798

RESUMO

Because of the scarcity of donor hearts, conventional operations on heart allografts are now being performed in lieu of retransplantation. Our experience with mitral valve replacement in the orthotopically transplanted heart is presented, supporting the utility of conventional operations when indicated.


Assuntos
Transplante de Coração , Próteses Valvulares Cardíacas , Valva Mitral/cirurgia , Feminino , Humanos , Pessoa de Meia-Idade , Insuficiência da Valva Mitral/cirurgia , Isquemia Miocárdica/cirurgia , Transplante Homólogo
20.
J Am Coll Surg ; 184(1): 44-8, 1997 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-8989299

RESUMO

BACKGROUND: While gastroesophageal reflux is amenable to medical and surgical treatment, the severity of pathophysiologic changes of the disease correlates poorly with the symptomatology. Similarly, the overall successful outcome of surgical therapy can be lessened by the poor outcome in a small number of patients despite the technical success of the operation. We conducted a study to determine the influence of illness behavior on the outcome and efficacy of laparoscopic Nissen fundoplication. STUDY DESIGN: From a larger group of patients undergoing a laparoscopic Nissen fundoplication, 77 patients (57 male, 20 female) completed an illness behavior questionnaire before and after surgery. This previously validated questionnaire assessed 10 scales of illness behavior. The results were compared with visual analog scales of outcome for overall satisfaction, heartburn, and solid food dysphagia, which were elicited independently from a standardized clinical follow-up questionnaire. RESULTS: Patients completed the questionnaire on average 2 months before and 25 months after surgery. High preoperative and postoperative scores for the "affective" and "hypochondriacal" scales were associated with poorer satisfaction with the surgical outcome. Although successful relief of reflux symptoms was unrelated to any preoperative illness behavior scale, postoperative scores for "disease conviction" and "disease affirmation" were predictors of further symptomatic heartburn in a small group of patients. Dysphagia did not correlate with illness behavior. When preoperative and postoperative scores were compared, no change in illness behavior was demonstrated, with the exception of lower scores for disease conviction and disease affirmation. CONCLUSIONS: These results suggest that while patient perception of disease is improved by laparoscopic fundoplication, patient satisfaction with the surgical outcome is in part determined by preoperative illness behavior.


Assuntos
Refluxo Gastroesofágico/psicologia , Laparoscopia/psicologia , Papel do Doente , Feminino , Seguimentos , Fundoplicatura/psicologia , Fundoplicatura/estatística & dados numéricos , Refluxo Gastroesofágico/cirurgia , Humanos , Laparoscopia/estatística & dados numéricos , Masculino , Pessoa de Meia-Idade , Período Pós-Operatório , Psicologia Social , Inquéritos e Questionários , Resultado do Tratamento
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