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1.
Gut Microbes ; 16(1): 2338322, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38630015

RESUMO

To determine the efficacy of the probiotic Bifidobacterium longum CECT 7347 (ES1) and postbiotic heat-treated Bifidobacterium longum CECT 7347 (HT-ES1) in improving symptom severity in adults with diarrhea-predominant irritable bowel syndrome (IBS-D), a randomised, double-blind, placebo-controlled trial with 200 participants split into three groups was carried out. Two capsules of either ES1, HT-ES1 or placebo were administered orally, once daily, for 84 days (12 weeks). The primary outcome was change in total IBS-Symptom Severity Scale (IBS-SSS) score from baseline, compared to placebo. Secondary outcome measures were stool consistency, quality of life, abdominal pain severity and anxiety scores. Safety parameters and adverse events were also monitored. The change in IBS-SSS scores from baseline compared to placebo, reached significance in the ES1 and HT-ES1 group, on Days 28, 56 and 84. The decrease in mean IBS-SSS score from baseline to Day 84 was: ES1 (-173.70 [±75.60]) vs placebo (-60.44 [±65.5]) (p < .0001) and HT-ES1 (-177.60 [±79.32]) vs placebo (-60.44 [±65.5]) (p < .0001). Secondary outcomes included changes in IBS-QoL, APS-NRS, stool consistency and STAI-S and STAI-T scores, with changes from baseline to Day 84 being significant in ES1 and HT-ES1 groups, compared to the placebo group. Both ES1 and HT-ES1 were effective in reducing IBS-D symptom severity, as evaluated by measures such as IBS-SSS, IBS-QoL, APS-NRS, stool consistency, and STAI, in comparison to the placebo. These results are both statistically significant and clinically meaningful, representing, to the best of the authors' knowledge, the first positive results observed for either a probiotic or postbiotic from the same strain, in this particular population.


What is already known on this topicIBS is a chronic functional gastrointestinal disorder characterized by abdominal pain, bloating and abnormalities in stool frequency or form. The gut microbiota of people living with IBS differs markedly to the microbiota of healthy individuals. Gut microbiota may play a key role in IBS aetiology and IBS symptoms may be alleviated by modulating the gut microbiota. Several proposed ways to modulate gut health include normalizing the gut microbiota, preventing the overgrowth of pathogenic bacteria, modulating visceral afferent pathways, and enhancing intestinal barrier function. However, significant heterogeneity between studies, study quality and population, study design and concerns about sample size have limited national and supranational bodies from recommending probiotics for IBS. Further well-powered, randomized, repeatable and controlled trials are warranted.What this study addsThe results of this study substantially contribute to the IBS research field, firstly by providing clinically meaningful and statistically significant results from a rigorous, well designed randomized, placebo-controlled trial and secondly, by exploring the use of postbiotics in IBS, an area of research still in its infancy. Probiotic (ES1) and postbiotic (HT-ES1) supplementation significantly reduced IBS symptom severity scores compared to placebo. This study met primary and secondary outcomes and strongly suggest that ES1 and HT-ES1 could be beneficial in the management of IBS.How this study might affect research, practice, or policyThis study adds to the current evidence base, supporting the use of probiotic/postbiotics for IBS. This research could be used to inform health professionals about using probiotics in IBS and help improve the quality of life and wellbeing for people living with the condition.


Assuntos
Bifidobacterium longum , Microbioma Gastrointestinal , Síndrome do Intestino Irritável , Peptídeos Cíclicos , Adulto , Humanos , Síndrome do Intestino Irritável/terapia , Qualidade de Vida , Temperatura Alta , Diarreia
2.
Biomicrofluidics ; 16(5): 054107, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-36275916

RESUMO

Breakthrough cell therapies for the treatment of cancers require the separation of specific cells, such as T cells, from the patient's blood. Current cell therapy processes rely on magnetic separation, which adds clinical risk and requires elevated manufacturing controls due to the added foreign material that constitutes the magnetic beads. Acoustophoresis, a method that uses ultrasound for cell separation, has demonstrated label-free enrichment of T cells from blood, but residual other lymphocytes limit the ultimate purity of the output T cell product. Here, to increase the specificity of acoustophoresis, we use affinity reagents to conjugate red blood cells with undesired white blood cells, resulting in a cell-cell complex (rosette) of increased acoustic mobility. We achieve up to 99% purity of T cells from blood products, comparable to current standards of magnetic separation, yet without the addition of separation particles.

3.
Comput Math Methods Med ; 2022: 4688327, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35572826

RESUMO

Cervical cancer has become the third most common form of cancer in the in-universe, after the widespread breast cancer. Human papillomavirus risk of infection is linked to the majority of cancer cases. Preventive care, the most expensive way of fighting cancer, can protect about 37% of cancer cases. The Pap smear examination is a standard screening procedure for the initial screening of cervical cancer. However, this manual test procedure generates many false-positive outcomes due to individual errors. Various researchers have extensively investigated machine learning (ML) methods for classifying cervical Pap cells to enhance manual testing. The random forest method is the most popular method for anticipating features from a high-dimensional cancer image dataset. However, the random forest method can get too slow and inefficient for real-time forecasts when too many decision trees are used. This research proposed an efficient feature selection and prediction model for cervical cancer datasets using Boruta analysis and SVM method to deal with this challenge. A Boruta analysis method is used. It is improved from of random forest method and mainly discovers feature subsets from the data source that are significant to assigned classification activity. The proposed model's primary aim is to determine the importance of cervical cancer screening factors for classifying high-risk patients depending on the findings. This research work analyses cervical cancer and various risk factors to help detect cervical cancer. The proposed model Boruta with SVM and various popular ML models are implemented using Python and various performance measuring parameters, i.e., accuracy, precision, F1-Score, and recall. However, the proposed Boruta analysis with SVM performs outstanding over existing methods.


Assuntos
Neoplasias do Colo do Útero , Detecção Precoce de Câncer , Feminino , Humanos , Aprendizado de Máquina , Fatores de Risco , Neoplasias do Colo do Útero/diagnóstico , Esfregaço Vaginal
4.
Front Psychol ; 13: 848784, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35310201

RESUMO

Brain tumor classification plays a niche role in medical prognosis and effective treatment process. We have proposed a combined feature and image-based classifier (CFIC) for brain tumor image classification in this study. Carious deep neural network and deep convolutional neural networks (DCNN)-based architectures are proposed for image classification, namely, actual image feature-based classifier (AIFC), segmented image feature-based classifier (SIFC), actual and segmented image feature-based classifier (ASIFC), actual image-based classifier (AIC), segmented image-based classifier (SIC), actual and segmented image-based classifier (ASIC), and finally, CFIC. The Kaggle Brain Tumor Detection 2020 dataset has been used to train and test the proposed classifiers. Among the various classifiers proposed, the CFIC performs better than all other proposed methods. The proposed CFIC method gives significantly better results in terms of sensitivity, specificity, and accuracy with 98.86, 97.14, and 98.97%, respectively, compared with the existing classification methods.

5.
IEEE J Biomed Health Inform ; 26(4): 1464-1471, 2022 04.
Artigo em Inglês | MEDLINE | ID: mdl-34214045

RESUMO

Cervical cancer is one of the common cancers among women and it causes significant mortality in many developing countries. Diagnosis of cervical lesions is done using pap smear test or visual inspection using acetic acid (staining). Digital colposcopy, an inexpensive methodology, provides painless and efficient screening results. Therefore, automating cervical cancer screening using colposcopy images will be highly useful in saving many lives. Nowadays, many automation techniques using computer vision and machine learning in cervical screening gained attention, paving the way for diagnosing cervical cancer. However, most of the methods rely entirely on the annotation of cervical spotting and segmentation. This paper aims to introduce the Faster Small-Object Detection Neural Networks (FSOD-GAN) to address the cervical screening and diagnosis of cervical cancer and the type of cancer using digital colposcopy images. The proposed approach automatically detects the cervical spot using Faster Region-Based Convolutional Neural Network (FR-CNN) and performs the hierarchical multiclass classification of three types of cervical cancer lesions. Experimentation was done with colposcopy data collected from available open sources consisting of 1,993 patients with three cervical categories, and the proposed approach shows 99% accuracy in diagnosing the stages of cervical cancer.


Assuntos
Neoplasias do Colo do Útero , Colo do Útero/diagnóstico por imagem , Colposcopia , Atenção à Saúde , Detecção Precoce de Câncer/métodos , Feminino , Humanos , Masculino , Teste de Papanicolaou , Gravidez , Sensibilidade e Especificidade , Neoplasias do Colo do Útero/diagnóstico por imagem , Neoplasias do Colo do Útero/patologia , Esfregaço Vaginal
6.
J Photochem Photobiol B ; 168: 89-97, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28189845

RESUMO

A new series of bis-pyrazoles 6a-t were synthesized from 3,5-dimethyl pyrazole using sequential approach. All these compounds were characterized by IR, 1H NMR, 13C NMR and mass spectral data. The interaction of newly synthesized bis-pyrazoles with DNA was investigated through molecular docking and absorption spectroscopic technique. Among all bis-pyrazoles compounds, the 6h compound showed lower conformational energy through in silico analysis. The interaction of each molecule in this series 6a-t with the various concentrations of DNA was examined through the UV-visible spectroscopic studies. The UV-visible spectroscopy studies on the specific binding of compound 6a, 6b, 6g, 6h, 6d, 6i, 6k, 6n, 6s with DNA have exhibited spectral shifts and the results were discussed. In further the compounds 6a-t were subjected to the in-vitro cytotoxicity studies against human pancreatic adenocarcinoma, human non-small cell lung carcinoma cell lines. Among the screened compounds, N-(3-isopropoxy-1-isopropyl-4-(3,5-dimethyl-1H-pyrazol-1-yl)-1H-pyrazol-5-yl)cyclobutane carboxamide and N-(5'-Isopropoxy-2'-isopropyl-3,5-dimethyl-2'H-[1,4'] bipyrazolyl-3'-yl)-dimethane sulfonamide were found as lead molecules since they have exhibited promising activity against both the cancer cell lines used in this study, whereas the compounds 4-(trifluoromethyl)-N-(3-isopropoxy-1-isopropyl-4-(3,5-dimethyl-2H-pyrrol-2-yl)-1H-pyrazol-5-yl)benzamide and 2,6-difluoro-N-(3-isopropoxy-1-isopropyl-4-(3,5-dimethyl-2H-pyrrol-2-yl)-1H-pyrazol-5-yl) benzamide were found to be active against the pancreatic cell line only. Rest all the other compounds were found to exhibit moderate to good activity towards both the cell lines.


Assuntos
Morte Celular/efeitos dos fármacos , DNA/metabolismo , Pirazóis/farmacologia , Linhagem Celular Tumoral , Humanos , Neoplasias Pulmonares/tratamento farmacológico , Simulação de Acoplamento Molecular , Neoplasias Pancreáticas/tratamento farmacológico , Pirazóis/síntese química , Pirazóis/metabolismo , Análise Espectral , Relação Estrutura-Atividade
7.
Fitoterapia ; 114: 26-33, 2016 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-27521895

RESUMO

In an attempt to discover new scaffolds for anti-diabetic activity from plants, we screened extracts from Ixora brachiata Roxb. for their effect on glucose uptake in L6 myotubes. The petroleum (PE) extract of the plant showed a significant increase in insulin stimulated glucose uptake by L6 myotubes. The bioactivity guided fractionation of the crude extract yielded a compound (E)-9-oxooctadec-10-en-12-ynoic acid (OEA). The compound induced a dose dependent increase in insulin stimulated glucose uptake in L6 myotubes with an EC50 of 22.96µM. OEA also increased the phosphorylation of IRS-1, Akt and AS160 leading to increased GLUT4 translocation to the plasma membrane indicating that it promotes insulin stimulated glucose uptake in L6 myotubes by activating the PI3K pathway.


Assuntos
Di-Inos/farmacologia , Ácidos Graxos Insaturados/farmacologia , Glucose/metabolismo , Fibras Musculares Esqueléticas/efeitos dos fármacos , Extratos Vegetais/farmacologia , Rubiaceae/química , Transdução de Sinais , Animais , Células Cultivadas , Di-Inos/isolamento & purificação , Ácidos Graxos Insaturados/isolamento & purificação , Proteínas Ativadoras de GTPase/metabolismo , Transportador de Glucose Tipo 4/metabolismo , Insulina/farmacologia , Proteínas Substratos do Receptor de Insulina/metabolismo , Fibras Musculares Esqueléticas/metabolismo , Fosfatidilinositol 3-Quinases/metabolismo , Fosforilação , Proteínas Proto-Oncogênicas c-akt/metabolismo , Ratos
9.
Indian J Cancer ; 51(4): 481-6, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-26842171

RESUMO

BACKGROUND: Outcome of febrile neutropenia (FN) in acute leukemia patients undergoing intensive chemotherapy from India is scanty. MATERIALS AND METHODS: A prospective, observational, single institutional study was conducted to evaluate the clinical features, microbiological aspects, risk factors influencing the outcome of high risk FN during intensive therapy in acute leukemia. RESULTS: Among 115 febrile episodes, though 94 (81.7%) had indwelling central venous catheter (CVC) at the time of diagnosis of FN, infective foci clinically were identified in 70.4% of episodes, with lung as the major site (25.2%) followed by CVC (17.4%). Microbiological documentation was possible in 33% (n = 40) episodes. Gram-negative bacteria isolates were 58.3% and Gram-positive isolates were 41.7% of which Pseudomonas was the predominant Gram-negative and Staphylococcus aureus was the most common Gram-positive isolate. Piperacillin-tazobactam + amikacin were used as first line antibiotic in 93% episodes and second line antibiotics were necessary in 73% episodes. Granulocyte colony stimulating factor was used in 60.9% episodes of high risk FN mostly in acute myeloid leukemia consolidation patients. Eighteen episodes (15.7%) were assigned to have invasive fungal disease. Eleven (9.6%) out of 115 high risk FN had a fatal outcome. Presence of pulmonary infection predicted for fatal outcome (P = 0.02). CONCLUSION: This study reports the outcome of high risk FN in patients with acute leukemia undergoing intensive chemotherapy. Gram-negative isolates are highly sensitive to piperacillin-tazobactum and hence in a cost restraint scenario, carbapenems needs to be judiciously used. Focus of Infection in lungs during FN predicted higher fatal outcomes.


Assuntos
Antibacterianos/uso terapêutico , Antineoplásicos/efeitos adversos , Neutropenia Febril Induzida por Quimioterapia/complicações , Infecções por Bactérias Gram-Negativas/tratamento farmacológico , Infecções por Bactérias Gram-Positivas/tratamento farmacológico , Infecções Respiratórias/tratamento farmacológico , Adolescente , Adulto , Idoso , Antifúngicos/uso terapêutico , Infecções Relacionadas a Cateter/tratamento farmacológico , Infecções Relacionadas a Cateter/microbiologia , Neutropenia Febril Induzida por Quimioterapia/tratamento farmacológico , Neutropenia Febril Induzida por Quimioterapia/mortalidade , Criança , Pré-Escolar , Feminino , Humanos , Índia , Leucemia Mieloide Aguda/tratamento farmacológico , Pneumopatias/tratamento farmacológico , Pneumopatias/microbiologia , Masculino , Pessoa de Meia-Idade , Micoses/tratamento farmacológico , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamento farmacológico , Estudos Prospectivos , Infecções Respiratórias/microbiologia , Fatores de Risco , Taxa de Sobrevida , Resultado do Tratamento , Adulto Jovem
10.
Bioorg Med Chem Lett ; 22(12): 4193-7, 2012 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-22546672

RESUMO

A series of ß-keto esters were synthesized from heteroaryl esters and ethyl acetate using LiHMDS as base at -50 to -30 °C. The increase in yields of cross condensed product were observed and the percentage of self condensed product was reduced drastically by applying the suitable base (LiHMDS), solvent and the minimum amount of ethyl acetate. All these ß-keto esters were characterized using (1)H NMR, (13)C NMR and mass spectral data. A plausible mechanism is also depicted to prove the formation of trans-esterified products. All the synthesized compounds were subjected to test for their cytotoxicity towards various cancer cell lines and also tested for their antimicrobial activity towards various bacterial and fungal strains and some of them were found to have promising activity.


Assuntos
Anti-Infecciosos/síntese química , Antineoplásicos/síntese química , Cetonas/síntese química , Acetatos/química , Anti-Infecciosos/farmacologia , Antineoplásicos/farmacologia , Bactérias/efeitos dos fármacos , Bactérias/crescimento & desenvolvimento , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Ésteres/síntese química , Ésteres/farmacologia , Fungos/efeitos dos fármacos , Fungos/crescimento & desenvolvimento , Humanos , Concentração Inibidora 50 , Cetonas/farmacologia , Espectroscopia de Ressonância Magnética , Testes de Sensibilidade Microbiana , Solventes/química , Relação Estrutura-Atividade
11.
Oncogene ; 29(18): 2691-700, 2010 May 06.
Artigo em Inglês | MEDLINE | ID: mdl-20190805

RESUMO

The tumor suppressor p53 protein is activated by genotoxic stress and regulates genes involved in senescence, apoptosis and cell-cycle arrest. Nine p53 isoforms have been described that may modulate suppressive functions of the canonical p53 protein. Among them, Delta133p53 lacks the 132 proximal residues and has been shown to modulate p53-induced apoptosis and cell-cycle arrest. Delta133p53 is expressed from a specific mRNA, p53I4, driven by an alternative promoter P2 located between intron 1 and exon 5 of TP53 gene. Here, we report that the P2 promoter is regulated in a p53-dependent manner. Delta133p53 expression is increased in response to DNA damage by doxorubicin in p53 wild-type cell lines, but not in p53-mutated cells. Chromatin immunoprecipitation and luciferase assays using P2 promoter deletion constructs indicate that p53 binds functional response elements located within the P2 promoter. We also show that Delta133p53 does not bind specifically to p53 consensus DNA sequence in vitro, but competes with wild-type p53 in specific DNA-binding assays. Finally, we report that Delta133p53 counteracts p53-dependent growth suppression in clonogenic assays. These observations indicate that Delta133p53 is a novel target of p53 that may participate in a negative feedback loop controlling p53 function.


Assuntos
Genes p53 , Regiões Promotoras Genéticas , Elementos de Resposta/fisiologia , Proteína Supressora de Tumor p53/fisiologia , Linhagem Celular Tumoral , DNA/metabolismo , Dano ao DNA , Humanos , Isoformas de Proteínas , Transcrição Gênica , Ativação Transcricional , Proteína Supressora de Tumor p53/análise
12.
Biol Trace Elem Res ; 138(1-3): 212-25, 2010 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-20165931

RESUMO

Copper is known as Gunma Kaalan in Siddha literature, which means that the drug is effective for healing ulcers. The herbomineral drug "Thamira parpam" is prepared by calcining the purified copper foils with rock salt, lime juice, bracteated birth wort juice, and Alangium root decoction according to Siddha medicine. Our study investigated the possible role of Thamira parpam (TP) in the management of cysteamine-induced duodenal ulcers. Cysteamine (400 mg kg(-1) body weight(-1), two doses at 4 h interval) orally given to rats resulted in high ulcer index, increased TBARS with concomitant depletion of antioxidants such as superoxide dismutase, glutathione, glutathione peroxidase, and inflammatory markers cathepsin D, and myeloperoxidase (p < 0.01). Herbomineral drug TP (0.5, 1, and 2 mg/kg, p.o.) challenged with cysteamine attenuated the elevation of TBARS and imbalance of antioxidants. In the increases in liver inflammatory markers, tissue histopathology changes were not severe in TP treatment. Positive control omeprazole (25 mg/kg, body weight, orally) showed considerable protection against anomaly in biochemical parameters and tissue histology. Hence, our results indicate that the attenuation of oxidative stress by the herbomineral drug in experimentally induced damage to liver and duodenum of rats could be mediated by free radical quenching property.


Assuntos
Cisteamina/toxicidade , Úlcera Duodenal/induzido quimicamente , Duodeno/metabolismo , Fígado/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Extratos Vegetais/farmacologia , Animais , Peso Corporal/efeitos dos fármacos , Catepsina D/metabolismo , Úlcera Duodenal/metabolismo , Duodeno/efeitos dos fármacos , Glutationa/metabolismo , Peroxidação de Lipídeos/efeitos dos fármacos , Fígado/efeitos dos fármacos , Peroxidase/metabolismo , Protetores contra Radiação/toxicidade , Ratos , Superóxido Dismutase/metabolismo
13.
Acta Crystallogr Sect E Struct Rep Online ; 65(Pt 10): o2486-7, 2009 Sep 19.
Artigo em Inglês | MEDLINE | ID: mdl-21577937

RESUMO

In the title compound, C(35)H(36)N(2)O(5)·0.5C(4)H(10)O, the asymmetric unit contains one bicyclo-[3.3.1]nonane mol-ecule and a half-occupancy diethyl ether solvent with the O atom lying on a crystallographic inversion center. Two intra-molecular N-H⋯O hydrogen bonds generate S(6) ring motifs. The bicyclo-[3.3.1]nonane ring system adopts a chair-boat conformation. In the crystal structure, the mol-ecules are linked by weak inter-molecular C-H⋯N hydro-gen bonds into chains along the b axis; additional stabilization is provide by C-H⋯π inter-actions.

14.
Rev Sci Instrum ; 79(8): 084301, 2008 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-19044366

RESUMO

Diffuse optical tomography (DOT) using near-infrared (NIR) light is a promising tool for noninvasive imaging of deep tissue. This technique is capable of quantitative reconstructions of absorption coefficient inhomogeneities of tissue. The motivation for reconstructing the optical property variation is that it, and, in particular, the absorption coefficient variation, can be used to diagnose different metabolic and disease states of tissue. In DOT, like any other medical imaging modality, the aim is to produce a reconstruction with good spatial resolution and accuracy from noisy measurements. We study the performance of a phase array system for detection of optical inhomogeneities in tissue. The light transport through a tissue is diffusive in nature and can be modeled using diffusion equation if the optical parameters of the inhomogeneity are close to the optical properties of the background. The amplitude cancellation method that uses dual out-of-phase sources (phase array) can detect and locate small objects in turbid medium. The inverse problem is solved using model based iterative image reconstruction. Diffusion equation is solved using finite element method for providing the forward model for photon transport. The solution of the forward problem is used for computing the Jacobian and the simultaneous equation is solved using conjugate gradient search. The simulation studies have been carried out and the results show that a phase array system can resolve inhomogeneities with sizes of 5 mm when the absorption coefficient of the inhomogeneity is twice that of the background tissue. To validate this result, a prototype model for performing a dual-source system has been developed. Experiments are carried out by inserting an inhomogeneity of high optical absorption coefficient in an otherwise homogeneous phantom while keeping the scattering coefficient same. The high frequency (100 MHz) modulated dual out-of-phase laser source light is propagated through the phantom. The interference of these sources creates an amplitude null and a phase shift of 180 degrees along a plane between the two sources with a homogeneous object. A solid resin phantom with inhomogeneities simulating the tumor is used in our experiment. The amplitude and phase changes are found to be disturbed by the presence of the inhomogeneity in the object. The experimental data (amplitude and the phase measured at the detector) are used for reconstruction. The results show that the method is able to detect multiple inhomogeneities with sizes of 4 mm. The localization error for a 5 mm inhomogeneity is found to be approximately 1 mm.


Assuntos
Fótons , Tomografia Óptica/instrumentação , Tomografia Óptica/métodos , Algoritmos , Simulação por Computador , Análise de Elementos Finitos , Humanos , Aumento da Imagem/métodos , Matemática , Imagens de Fantasmas , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Espectrofotometria Infravermelho
15.
Physiol Meas ; 25(4): 957-65, 2004 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-15382834

RESUMO

Compared to other non-invasive methods, the conventional 12-lead electrocardiogram (ECG) has low sensitivity and specificity for identifying coronary artery disease (CAD). We compared the newly developed high-frequency QRS electrocardiogram (HFQRS ECG, 150-250 Hz) with adenosine sestamibi myocardial perfusion study (MPI)-the most sensitive non-invasive study in cardiology practice. Using advanced 12-lead computer-based ECG software recently developed at NASA, criteria for a positive 12-lead HFQRS-ECG test for obstructive CAD were developed using 300 signal-averaged beats from patients undergoing elective coronary angiograms for evaluation of chest pain. These criteria, which rely strictly upon the presence or the absence of morphologic 'reduced amplitude zones' (RAZs) and not upon the 'root mean squared' (RMS) voltage amplitudes of the HFQRS complexes, were then applied prospectively to 18 patients undergoing MPI. Active CAD was considered present when reversible ischemic defects were present on MPI. Of the 18 patients, 9 had reversible defects on MPI (positive scan), whereas the other 9 had no reversible perfusion defects (negative scan). Patients with a positive nuclear study went on to coronary angiography confirming CAD, except in one patient who had nonobstructive coronary disease (<50% stenosis). Eight of the 18 subjects therefore had active CAD, whereas 10 were judged not to have active CAD. The 12-lead HFQRS-ECG result was consistent with nuclear scan results in 14 of 18 patients. The HFQRS-ECG and nuclear results differed in: (1) one patient who had a low score positive MPI, negative HFQRS-ECG and normal coronary angiogram; (2) one patient who had a small reversible anterior wall perfusion defect, 60% LAD lesion on angiogram but a negative HF-QRS result; and (3) two individuals who had positive HFQRS-ECG results in the face of negative nuclear scans but who did not undergo angiography. 12-lead HFQRS ECG had excellent sensitivity (87.5% based on 7/8 true positives correctly identified) and specificity (no worse than 80%, >8/10 true negatives correctly identified) for identifying CAD. 12-lead HFQRS ECG is an easily performed, inexpensive and potentially widely available technique that utilizes the same leads and electrodes as the conventional 12-lead ECG. It had accuracy comparable to MPI in this study. Resting 12-lead HFQRS ECG appears to be a very promising non-invasive technique for identifying CAD and may represent a viable alternative to many of the more expensive and time-consuming techniques presently utilized for non-invasively identifying CAD.


Assuntos
Doença da Artéria Coronariana/diagnóstico , Eletrocardiografia/métodos , Processamento de Sinais Assistido por Computador , Idoso , Angiografia , Feminino , Humanos , Angiografia por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Sensibilidade e Especificidade , Software
16.
Am J Clin Oncol ; 17(5): 432-6, 1994 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-7522394

RESUMO

Staging in prostate cancer, as in any other cancer has significant ramifications in management. Currently, prostate-specific antigen (PSA) determination and the bone scan are two important procedures in the pretreatment staging workup of prostate cancer. PSA is a very useful serum tumor marker in the management of prostate cancer patients. We retrospectively evaluated 90 patients at the time of initial diagnosis of prostate cancer, all of whom had initial PSA levels measured, as well as bone scans obtained. In addition to the PSA level, we considered clinical stage and pathologic grade in the prediction of bone scan for metastases, at the time of initial diagnosis of prostate cancer. Negative predictive value for PSA values < 10 ng/ml (27 patients), clinical stage A (9 patients) and pathologic grade 1 (19 patients) was 100%. The number of patients with bone scan evidence of metastasis with < 10 ng/ml and > 10 ng/ml PSA levels were 0% (0/27 patients) and 27% (17/63 patients) (p = .0022 [Fisher's Exact test]; p = .003 [chi-square test]). In patients with higher stage (p = .688), grade (p = .039), or PSA levels (p = .0001), the incidence of bone metastases increased. However, none of these three parameters can predict reliably bone scan evidence of metastases (i.e., positive predictive value). The negative predictive values did not improve when a combination of the two or three of the above parameters were used.


Assuntos
Neoplasias Ósseas/diagnóstico por imagem , Osso e Ossos/diagnóstico por imagem , Antígeno Prostático Específico/sangue , Neoplasias da Próstata/imunologia , Idoso , Neoplasias Ósseas/secundário , Humanos , Masculino , Estadiamento de Neoplasias , Valor Preditivo dos Testes , Neoplasias da Próstata/diagnóstico por imagem , Neoplasias da Próstata/patologia , Cintilografia , Estudos Retrospectivos
17.
Nucl Med Commun ; 14(8): 658-66, 1993 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-8371891

RESUMO

In this study, the clinical usefulness of 111In-SCN-Bz-diethylenetriaminepentaacetic acid (DTPA) monoclonal antibody (MoAb) B72.3 in patients with recurrent colorectal carcinoma was evaluated. In previous studies with radiolabelled MoAb B72.3, metastatic liver lesions in patients with colon cancer appeared as areas of either increased (hot lesions) or decreased (cold lesions) activity, and extrahepatic lesions appeared as areas of increased activity. Eleven patients were enrolled in this study, and 12 MoAb imaging study results were correlated with computed tomography/magnetic resonance imaging findings. The improved detection rates (number of hot lesions) in MoAb imaging were 48% (14/29) for hepatic metastases and 60% (6/10) for extrahepatic metastases. This represents a significant improvement in the rate of detection of metastatic disease of the liver in patients with recurrent colon cancer when compared to the rate in previous reports. Seventeen clinically unsuspected hepatic and extrahepatic areas of increased uptake were also identified on MoAb studies, and two of these areas were confirmed as metastatic disease at surgery. The rate of detection of extrahepatic metastases with 111In-SCN-Bz-DTPA MoAb B72.3 was also compared and found to be equal to the detection rates with other radiolabelled immunoconjugates. No major adverse side effects were noted during the administration of the MoAb. Four of nine patients tested had a positive anti-mouse antibody (HAMA) response 3 months after injection. These preliminary data indicate that this 111In-labelled immunoconjugate of MoAb B72.3 demonstrates an improvement in hepatic lesion detection rate than did previously reported preparations in patients with recurrent colon cancer.


Assuntos
Neoplasias do Colo/diagnóstico por imagem , Neoplasias Hepáticas/secundário , Recidiva Local de Neoplasia/diagnóstico por imagem , Radioimunodetecção , Adulto , Idoso , Feminino , Humanos , Radioisótopos de Índio , Marcação por Isótopo/métodos , Neoplasias Hepáticas/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Ácido Pentético/análogos & derivados
19.
Clin Nucl Med ; 17(3): 180-4, 1992 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-1611787

RESUMO

The usefulness of radioimmunoscintigraphy with In-111 labeled MoAb B72.3 is illustrated in this case report of a patient with an aggressive cancer of the ascending colon. When used in conjunction with CT, ultrasound examination, and MRI, radioimmunoscintigraphy improved the specificity of these other imaging modalities, although the patient's serum CEA and TAG-72 levels remained within the normal ranges. In addition, MoAb imaging demonstrated superiority over CT in identifying an additional unsuspected lesion. Detection of occult disease by imaging modalities with or without elevated serum CEA levels is discussed.


Assuntos
Antígenos de Neoplasias/análise , Antígeno Carcinoembrionário/análise , Neoplasias do Colo/diagnóstico por imagem , Glicoproteínas/análise , Radioisótopos de Índio , Recidiva Local de Neoplasia/diagnóstico por imagem , Radioimunodetecção , Adulto , Feminino , Humanos , Valores de Referência
20.
Cleve Clin J Med ; 58(3): 243-7, 1991.
Artigo em Inglês | MEDLINE | ID: mdl-1893555

RESUMO

Isolated levocardia with situs inversus, or ILSI, is a rare anomaly with a reported incidence of 1:22,000 in the general population and from 0.4% to 1.2% of all patients with congenital heart diseases. It is commonly associated with both congenital heart disease and splenic abnormalities, either asplenia or polysplenia. The prognosis is poor, and only about 5% to 13% of patients survive more than 5 years. The case described here, which had computed tomographic findings, is the first case reported with multiple malignancies associated with ILSI. This patient, at 73 years of age, is the second longest survivor reported in the literature.


Assuntos
Anormalidades Múltiplas , Levocardia/complicações , Neoplasias Primárias Múltiplas/complicações , Situs Inversus/complicações , Anormalidades Múltiplas/diagnóstico , Anormalidades Múltiplas/mortalidade , Idoso , Feminino , Humanos , Levocardia/diagnóstico , Levocardia/mortalidade , Neoplasias Primárias Múltiplas/mortalidade , Prognóstico , Situs Inversus/diagnóstico , Situs Inversus/mortalidade , Taxa de Sobrevida , Tomografia Computadorizada por Raios X
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