Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 161
Filtrar
1.
HLA ; 2018 May 20.
Artículo en Inglés | MEDLINE | ID: mdl-29781226

RESUMEN

One nucleotide substitution at residue 577 of HLA-B*27:04:01 results in a novel allele, HLA-B*27:120.

2.
Int J Oral Maxillofac Surg ; 47(10): 1236-1242, 2018 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-29843953

RESUMEN

Epidermal growth factor (EGF) promotes tumourigenesis and tissue repair of epithelial and mesenchymal cells and has a role in chemotaxis, mitogenesis, cell motility, and cytoprotection. It also enhances the growth of cancers. EGF may therefore have a role in the initiation or promotion of oral carcinogenesis. The cases of 152 patients with oral squamous cell carcinoma whose preoperative serum EGF level was determined by enzyme-linked immunosorbent assay were analyzed retrospectively, along with those of 40 age- and sex-matched controls. Patients with higher levels of EGF were more likely to have neck lymph node metastasis (P=0.026), advanced stage cancer (P=0.04), and a worse survival status (P=0.0019). Multivariate analysis using the Cox proportional hazards model indicated that the EGF level was an independent predictor of poor survival (hazard ratio 1.99, P=0.018). Patients with higher preoperative serum EGF levels had significantly poorer cancer-specific survival by Kaplan-Meier analysis (P=0.032). This study indicates that a higher preoperative serum EGF level is associated with neck lymph node metastasis, more advanced stage, and poor survival. EGF should be considered as a potential prognostic biomarker and a therapeutic target for patients with oral cancer.


Asunto(s)
Carcinoma de Células Escamosas/sangre , Carcinoma de Células Escamosas/patología , Factor de Crecimiento Epidérmico/sangre , Neoplasias de la Boca/sangre , Neoplasias de la Boca/patología , Biomarcadores de Tumor/sangre , Carcinoma de Células Escamosas/diagnóstico por imagen , Estudios de Casos y Controles , Ensayo de Inmunoadsorción Enzimática , Femenino , Humanos , Metástasis Linfática , Masculino , Persona de Mediana Edad , Neoplasias de la Boca/diagnóstico por imagen , Estadificación de Neoplasias , Pronóstico , Estudios Retrospectivos , Tasa de Supervivencia
3.
Int Endod J ; 51 Suppl 2: e125-e145, 2018 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-28439929

RESUMEN

AIM: To determine the expressions of hypoxia-related [hypoxia-inducible transcription factors (HIF)-1α, BCL2/adenovirus E1B 19 kDa protein-interacting protein 3 (BNIP3) and phospho-adenosine monophosphate activated protein kinase (pAMPK)] and autophagy-related [microtubule-associated protein 1 light chain 3 (LC3), beclin-1 (BECN-1), autophagy-related gene (Atg)5-12, and p62] proteins in human inflammatory periapical lesions. METHODOLOGY: Fifteen samples of radicular cysts (RCs) and 21 periapical granulomas (PGs), combined with 17 healthy dental pulp tissues, were examined. Enzyme-linked immunosorbent assay (ELISA) was used to detect interleukin (IL)-1ß cytokine; immunohistochemical (IHC) and Western blot (WB) analyses were employed to examine autophagy-related and hypoxia-related proteins. Transmission electron microscopy (TEM) was used to explore the ultrastructural morphology of autophagy in periapical lesions. Nonparametric Kruskal-Wallis tests and Mann-Whitney U-tests were used for statistical analyses. RESULTS: ELISA revealed a significantly higher (P < 0.001) IL-1ß expression in periapical lesions than in normal pulp tissue. Immunoscores of IHC expressions of pAMPK, HIF-1α, BNIP3, BECN-1 and Atg5-12 proteins in periapical lesions were significantly higher (P < 0.001) (except BECN-1) than those in normal pulp tissue. The results of IHC studies were largely compatible with those of WB analyses, where significantly higher (P < 0.05) expressions of hypoxia-related and autophagy-related proteins (except BECN-1, p62 and LC3II in WB analyses) in periapical lesions were noted as compared to normal pulp tissue. Upon TEM, ultrastructural double-membrane autophagosomes and autolysosomes were observed in PGs and RCs. CONCLUSIONS: Autophagy associated with hypoxia may play a potential causative role in the development and maintenance of inflamed periapical lesions.


Asunto(s)
Autofagia/fisiología , Enfermedades Periapicales/fisiopatología , Adulto , Anciano , Western Blotting , Pulpa Dental/metabolismo , Pulpa Dental/fisiología , Ensayo de Inmunoadsorción Enzimática , Femenino , Humanos , Hipoxia/fisiopatología , Inflamación/fisiopatología , Interleucina-1beta/metabolismo , Masculino , Microscopía Electrónica de Transmisión , Persona de Mediana Edad , Enfermedades Periapicales/metabolismo , Granuloma Periapical/metabolismo , Granuloma Periapical/fisiopatología , Quiste Radicular/metabolismo , Quiste Radicular/fisiopatología , Adulto Joven
4.
Malays J Pathol ; 39(3): 289-291, 2017 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-29279592

RESUMEN

BACKGROUND: Liver regeneration is dependent on the proliferation of hepatocytes. Hepatic progenitor cells are intra-hepatic precursor cells capable of differentiating into hepatocytes or biliary cells. Although liver progenitor cell proliferation during the regenerative process has been observed in animal models of severe liver injury, it has never been observed in vivo in humans because it is unethical to take multiple biopsy specimens for the purpose of studying the proliferation of liver progenitor cells and the roles they play in liver regeneration. Associating liver partition and portal vein ligation for staged hepatectomy (ALPPS) is a staged procedure for inducing remnant liver hypertrophy so that major hepatectomy can be performed safely. This staged procedure allows for liver biopsy specimens to be taken before and after the liver begins to regenerate. CASE PRESENTATION: The liver progenitor cell proliferation is observed in a patient undergoing ALPPS for a metastatic hepatic tumour. Liver biopsy is acquired before and after ALPPS for the calculation of average number of liver progenitor cell under high magnification examination by stain of immunomarkers. This is the first in vivo evidence of growing liver progenitor cells demonstrated in a regenerating human liver.


Asunto(s)
Hepatocitos/citología , Regeneración Hepática/fisiología , Hígado/citología , Células Madre/citología , Adulto , Proliferación Celular , Hepatectomía/métodos , Humanos , Ligadura , Neoplasias Hepáticas/cirugía , Masculino , Vena Porta/cirugía
5.
HLA ; 90(5): 311-312, 2017 11.
Artículo en Inglés | MEDLINE | ID: mdl-28727910

RESUMEN

Two nucleotide replacements within HLA-B*40:01:01 result in the novel allele, HLA-B*40:01:45.


Asunto(s)
Pueblo Asiatico/genética , Variación Genética , Antígenos HLA-B/genética , Células Madre Hematopoyéticas/metabolismo , Donantes de Tejidos , Alelos , Secuencia de Bases , Exones/genética , Humanos , Taiwán
6.
HLA ; 90(3): 184-185, 2017 09.
Artículo en Inglés | MEDLINE | ID: mdl-28544531

RESUMEN

One nucleotide substitution at residue 227 of HLA-DRB1*15:02:01:01 results in a new allele, HLA-DRB1*15:11.


Asunto(s)
Alelos , Cadenas HLA-DRB1/genética , Células Madre Hematopoyéticas , Donante no Emparentado , Humanos , Taiwán
7.
HLA ; 90(3): 175-176, 2017 09.
Artículo en Inglés | MEDLINE | ID: mdl-28544591

RESUMEN

One nucleotide substitution at residue 74 of HLA-B*27:04:01 results in a novel allele, HLA-B*27:112.


Asunto(s)
Donantes de Sangre , Antígenos HLA-B/genética , Polimorfismo de Nucleótido Simple , Análisis de Secuencia de ADN , Humanos , Taiwán
18.
HLA ; 89(2): 98-103, 2017 02.
Artículo en Inglés | MEDLINE | ID: mdl-28102039

RESUMEN

Chimerism is defined as the presence of 2 or more than 1 genetically distinct cell populations in an organism. Dispermic chimeras are derived from the fertilization of 1 or 2 matured nuclei by 2 sperms. We here report detection of a healthy and phenotypically normal female with normal ABO red blood cell typing in whom dispermic chimerism was suspected after 3 alleles were identified at multiple human leukocyte antigen (HLA) loci using molecular HLA analysis. Molecular HLA typing showed the donor to have 3 HLA-A, -B, -C, -DRB1, -DQB1 and -DPB1 alleles in blood, saliva and nail samples. In addition, 3 of her 9 short tandem repeat loci also showed to have 3 distinct alleles in blood, nail and saliva specimens. In all investigations, the third alleles were attributed to a dual paternal contribution. This case represents a dispermic chimerism, with 2 paternal and 1 maternal haplotypes variably distributed throughout body tissues in a healthy and phenotypically normal female without abnormalities in erythrocyte ABO blood group. The origin of this chimerism is probably due to the fertilization of a single egg and its polar body, or a parthenogenetic egg, by 2 sperms.


Asunto(s)
Alelos , Quimerismo , Genotipo , Patrón de Herencia , Donante no Emparentado , Sistema del Grupo Sanguíneo ABO/sangre , Sistema del Grupo Sanguíneo ABO/genética , Sistema del Grupo Sanguíneo ABO/inmunología , Adulto , Femenino , Expresión Génica , Antígenos HLA-A/sangre , Antígenos HLA-A/genética , Antígenos HLA-A/inmunología , Antígenos HLA-B/sangre , Antígenos HLA-B/genética , Antígenos HLA-B/inmunología , Antígenos HLA-C/sangre , Antígenos HLA-C/genética , Antígenos HLA-C/inmunología , Cadenas beta de HLA-DP/sangre , Cadenas beta de HLA-DP/genética , Cadenas beta de HLA-DP/inmunología , Cadenas beta de HLA-DQ/sangre , Cadenas beta de HLA-DQ/genética , Cadenas beta de HLA-DQ/inmunología , Cadenas HLA-DRB1/sangre , Cadenas HLA-DRB1/genética , Cadenas HLA-DRB1/inmunología , Voluntarios Sanos , Trasplante de Células Madre Hematopoyéticas , Humanos , Repeticiones de Microsatélite , Uñas/química , Linaje , Saliva/química , Taiwán
20.
HLA ; 89(1): 65-66, 2017 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-27860421

RESUMEN

One nucleotide deletion at residue 157 of HLA-DRB1*12:02:01 results in a new allele, HLA-DRB1*12:60N.

SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA