No abstract available.

To investigate epithelial cell proliferation reactivity in the odontogenic cysts, the expression of c-erbB-2 oncoprotein by epithelial lining was studied in odontogenic keratocyst(OKC, n=10), dentigerous cyst(DC, n=12), radicular cyst(RC, n=12) and normal dental follicle(n=7). The c-erbB-2 immunoreactivity was studied using a streptavidine- biotin- peroxidase method with polyclonal rabbit anti-human antibody to c-erbB-2 oncoprotein which is known to react with formalin fixed, paraffin-embedded sections and the intensity of staining was determined by manually. In all of 10(100%) OKCs, showed positive expression for c-erbB-2 oncoprotein compared with 10/12(83.3%) in DCs, 11/12(91.7%) in RCs and 5/7(71.4%) in normal dental follicles. The expression within OKC was higher than that of DC, RC and dental follicle but statistically not significant(p>0.05) and but may reflects underlying genetic defect. These results demonstrate differences in c-erbB-2 expression between the epithelial linings of the three major odontogenic cyst types, indicating differences in proliferation activity and differentiation processes within these lesions. And, in particular, these results are able to explain the peculiar aggressive growth pattern of OKC.
Dental Sac ; Epithelial Cells ; Formaldehyde ; Immunohistochemistry ; Odontogenic Cysts* ; Peroxidase

No abstract available.
Magnetic Resonance Imaging* ; Spinal Cord*

No abstract available.
Heart* ; Thoracic Surgery*

Malaria is known to have been eradicated for a few decades through the persistent efforts of the national health program in South Korea. However, malaria caused by Plasmodium vivax has started to reappear incidiously among military personnel near to the De-militarized Zone since 1993. From that time on the number of malarial cases have increased abruptly year by year. However, congenital malaria in a neonate is extreamly rare in Korea. We experienced one case of malaria in a neonate who was born from a mother affected by malaria. This neonate was born at 33(+3) weeks of gestational age. Here we present this case with a brief review of the literature.
Gestational Age ; Humans ; Infant, Newborn ; Korea ; Malaria* ; Military Personnel ; Mothers ; National Health Programs ; Plasmodium vivax

Despite advances in surgery, radiotherapy, and chemotherapy, the survival of patients with oral squamous cell carcinoma has not significantly improved over the past several decades. Gene therapy is currently under investigation and shows us new possibility of cancer curing method. This experiment was undergone to find out the cell growth inhibition effect and evidence of apoptosis by HCCS-1(human cervical cancer suppressor-1), one of the candidates of tumor suppressor gene, transducted to human oral cancer cell line. To determine the efficiency of the adenovirus as a gene delivery vector cell line was transducted with LacZ gene and analysed with X-gal staining. Northern blot was performed to confirm the transfection with HSCC-1 gene and cell viability was assessed by cell cytotoxicity assay using cell count kit(CCK). To show the evidence of apoptosis, DNA fragmentation assay and flow cytometry(FACS) were performed. We had successfully construct the recombinant HSCC-1 adenovirus(Ad5CMV-HCCS-1), and importation efficiency was 20% at 2 MOI(multiplicity of infection), 80% at 20 MOI. Northern blot analysis showed that a single 0.6kb mRNA transcript was expressed in Ad5CMV-HCCS-1 transducted cell lines. As a result of CCK, when comparing to control subjects, transducted group showed 50% growth inhibition. In DNA fragmentation assay, according to increasing of MOI, DNA volume was diminished. In FACS analysis, DNA distribution showed fragmentation.This results imply that HCCS-1gene has growth inhibition effect in human oral cancer cell lines through apoptosis induction.
Adenoviridae* ; Apoptosis* ; Blotting, Northern ; Carcinoma, Squamous Cell ; Cell Count ; Cell Line* ; Cell Survival ; DNA ; DNA Fragmentation ; Drug Therapy ; Genes, Tumor Suppressor ; Genes, vif ; Genetic Therapy ; Humans ; Lac Operon ; Mouth Neoplasms* ; Radiotherapy ; RNA, Messenger ; Transfection ; Uterine Cervical Neoplasms

For the repairing of bone defect, autogenous or allogenic bone grafting remains the standard. However, these methods have numerous disadvantages including limited amount, donor site morbidity and spread of diseases. Tissue engineering technique by culturing stem cells may allow for a smart solution for this problem. Adipose tissue contains mesenchymal stem cells that can be differentiate into bone, cartilage, fat or muscle by exposing them to specific growth conditions. In this study, the authors procured the stem cell from buccal fat pad and differentiate them into osteoblast and are to examine the bone induction capacity. Buccal fat-derived cells (BFDC) were obtained from human buccal fat pad and cultured. BFDC were analyzed for presence of stem cell by immunofluorescent staining against CD-34, CD-105 and STRO-1. After BFDC were differentiated in osteogenic medium for three passages, their ability to differentiate into osteogenic pathway were checked by alkaline phosphatase (ALP) staining, Alizarin red staining and RT-PCR for osteocalcin (OC) gene expression. Immunofluorescent and biochemical assays demonstrated that BFDC might be a distinguished stem cells and mineralization was accompanied by increased activity or expression of ALP and OC. And calcium phosphate deposition was also detected in their extracelluar matrix. The current study supports the presence of stem cells within the buccal fat pad and the potential implications for human bone tissue engineering for maxillofacial reconstruction.
Adipose Tissue* ; Adult Stem Cells* ; Adult* ; Alkaline Phosphatase ; Bone and Bones ; Bone Transplantation ; Calcium ; Cartilage ; Gene Expression ; Humans ; Mesenchymal Stromal Cells ; Osteoblasts* ; Osteocalcin ; Stem Cells ; Tissue Donors ; Tissue Engineering

Mucosal-associated lymphoid tissue(MALT) lymphoma is derived from the marginal zone B-cell compartment and can be found at wide variety of extranodal sites, most frequently at the gastrointestinal sites. Recent clinicopathologic studies suggest a relationship between MALT lymphoma and chronic inflammatory disorders, such as Helicobacter pylori infection in stomach or autoimmune disorders, such as Sj gren's syndrome in salivary glands. Primary gastrointestinal MALT lymphoma most commonly arises in the stomach and less often in the small and large intestine. Recently we experienced a case who had MALT lymphoma and tuberculous enteritis at the same site (jejunum) confirmed by exploratory laparotomy.
B-Lymphocytes ; Enteritis* ; Helicobacter pylori ; Intestine, Large ; Intestine, Small ; Jejunum* ; Laparotomy ; Lymphoma* ; Lymphoma, B-Cell, Marginal Zone ; Salivary Glands ; Stomach

Loss of E-cadherin (E-cad) expression has been found in multiple cancers and is postulated to facilitate tumor cell dissociation and metastais. Promotor methylation may provides an alternative pathway for loss of gene function. This study evaluated the role of hypermethylation in the down-regulation of E-cad in oral squamous cell carcinoma (OSCC). We examined the E-cad expression by immunohistochemical staining and detected methylation status by methylation-specific polymerase chain reaction (MSP) in 20 OSCC tissues. Overally, 12 (60 %) cases of hypermethylation of E-cad were detected and we found there were no correlation between methylation and age, histologic grade, lympn node metastasis, tumor size and clinical stage. However, Eleven (73.3 %) of 15 samples which was negative for E-cad staining showed hypermethylation of E-cad promotor region. On the other hand, only one (20 %) of 5 E-cad positive sample was observed with methylated status. The underexpression of E-cad was found to be related to promotor hypermethylation (p=0.035). In conclusion, we suggest that hypermethylation play a role in inactivation of E-cad gene and may be a appreciable biomarker for diagnosis and treatment of OSCC.
Cadherins ; Carcinoma, Squamous Cell ; Dissociative Disorders ; Down-Regulation ; Hand ; Methylation ; Neoplasm Metastasis ; Polymerase Chain Reaction ; Promoter Regions, Genetic

Loss of E-cadherin (E-cad) expression has been found in multiple cancers and is postulated to facilitate tumor cell dissociation and metastais. Promotor methylation may provides an alternative pathway for loss of gene function. This study evaluated the role of hypermethylation in the down-regulation of E-cad in oral squamous cell carcinoma (OSCC). We examined the E-cad expression by immunohistochemical staining and detected methylation status by methylation-specific polymerase chain reaction (MSP) in 20 OSCC tissues. Overally, 12 (60 %) cases of hypermethylation of E-cad were detected and we found there were no correlation between methylation and age, histologic grade, lympn node metastasis, tumor size and clinical stage. However, Eleven (73.3 %) of 15 samples which was negative for E-cad staining showed hypermethylation of E-cad promotor region. On the other hand, only one (20 %) of 5 E-cad positive sample was observed with methylated status. The underexpression of E-cad was found to be related to promotor hypermethylation (p=0.035). In conclusion, we suggest that hypermethylation play a role in inactivation of E-cad gene and may be a appreciable biomarker for diagnosis and treatment of OSCC.
Cadherins ; Carcinoma, Squamous Cell ; Dissociative Disorders ; Down-Regulation ; Hand ; Methylation ; Neoplasm Metastasis ; Polymerase Chain Reaction ; Promoter Regions, Genetic