Female ; Humans ; Protein-Tyrosine Kinases ; Proto-Oncogene Proteins ; Neoplasms, Muscle Tissue/genetics* ; Uterus ; Oncogene Proteins, Fusion/genetics* ; Lung Neoplasms ; Proteins

Humans ; Infant ; Protein-Tyrosine Kinases ; Proto-Oncogene Proteins ; Brain Neoplasms/surgery* ; Glioma/surgery* ; Oncogene Proteins, Fusion/genetics* ; Lung Neoplasms

Resistance to thyroid hormone (RTH) is an autosomal dominant disorder that's characterized by inappropriate normal or elevated TSH levels despite of the elevated thyroid hormone levels. RTH is distinguished from the TSH secreting pituitary adenoma by performing the TRH stimulation test, TSH alpha subunit measurement and sellar MRI. A 23 year old woman visited our hospital complaining of fatigue, palpitation and heat intolerance and she had an anterior neck mass. She had elevated total T3, free T4 and TSH levels. The serum TSH levels were increased during the TRH stimulation test before and after T3 suppression. The serum TSH alpha subunit showed a normal response and the serum TSH alpha subunit/TSH molar ratio did not increase over 1.0 with TRH stimulation. Thyroid hormone receptor beta gene mutation was identified. Although a left pituitary microadenoma was revealed on sellar MRI, the patient was diagnosed as having pituitary RTH with a nonfunctioning pituitary microadenoma. We report here on a patient with pituitary RTH and a nonfunctioning pituitary microadenoma, and this is the first such case in Korea.
Fatigue ; Female ; Glycoprotein Hormones, alpha Subunit ; Hot Temperature ; Humans ; Molar ; Neck ; Pituitary Neoplasms ; Thyroid Gland ; Thyroid Hormone Receptors beta

Adenocarcinoma ; classification ; genetics ; pathology ; Adenocarcinoma, Bronchiolo-Alveolar ; genetics ; pathology ; Exons ; Humans ; Lung Neoplasms ; classification ; genetics ; pathology ; Mutation ; Oncogene Proteins, Fusion ; genetics ; Proto-Oncogene Proteins ; genetics ; Proto-Oncogene Proteins p21(ras) ; Receptor, Epidermal Growth Factor ; genetics ; ras Proteins ; genetics

OBJECTIVE: To investigate the molecular mechanism of Wnt5a and Epstein-Barr virus latent membrane protein 1 (LMP1) aberrant expression in the nasopharyngeal carcinogenesis and to estimate if it can act as a molecular marker for nasopharyngeal cancer (NPC). METHODS: Immunohistochemistry combined with previously made tissue microarrays were used to study the expression of Wnt5a and LMP1 in the nasopharyngeal carcinogenesis tissues. We investigated the role of over expression of Wnt5a and LMP1 in the development and progression of NPC and their relation with the clinicopathological features of NPC and whether they could act as molecular markers in benign and malignant NPC. RESULTS: The positive percentage of Wnt5a and LMP1 protein expression in the NPC was significantly increased as compared with that in atypically hyperplastic nasopharyngeal epithelium, hyperplastic nasopharyngeal epithelium and histologically normal nasopharyngeal epithelium (P<0.05, P<0.01, and P<0.01). Wnt5a and LMP1 proteins were significantly higher in atypically hyperplastic nasopharyngeal epithelium than those in the hyperplastic nasopharyngeal epithelium and normal nasopharyngeal epithelium (P<0.05 and P<0.01). The positive expression of Wnt5a and LMP1 proteins in clinical T3 and T4 staged NPC was higher than that in clinical T1 and T2 staged NPC (P<0.01 and P<0.05). The positive expression of Wnt5a protein in the NPC with lymph node metastasis was higher than that in the NPC without lymph node metastasis (P<0.01). The positive percentage of LMP1 protein was significantly increased in non-keratinizing carcinoma compared with undifferentiated carcinoma and keratinizing carcinoma (P<0.05 and P<0.05). The expression of Wnt5a protein in the NPC had significant positive correlation with LMP1 (r=0.354, P<0.001). Combined molecular phenotype of both Wnt5a and LMP1 expression was a good marker to distinguish NPC from non-cancerous nasopharyngeal epithelium. CONCLUSION The expression of Wnt5a and LMP1 protein in the NPC is positively correlated, and both wnt5a and LMP1 protein play important roles in the nasopharyngeal carcinogenesis either together or successively promoting the malignant transformation of nasopharyngeal epithelium and the development and progression of NPC. Both Wnt5a and LMP1 positive expression may act as good markers for NPC differential diagnosis.
Biomarkers, Tumor ; genetics ; metabolism ; Carcinogenesis ; Humans ; Nasopharyngeal Neoplasms ; genetics ; metabolism ; pathology ; Oncogene Proteins, Viral ; genetics ; metabolism ; Proto-Oncogene Proteins ; genetics ; metabolism ; Tissue Array Analysis ; Viral Matrix Proteins ; genetics ; metabolism ; Wnt Proteins ; genetics ; metabolism ; Wnt-5a Protein

Carcinoma, Non-Small-Cell Lung/genetics* ; China ; Consensus ; Humans ; Lung Neoplasms/genetics* ; Oncogene Proteins, Fusion/genetics* ; Proto-Oncogene Proteins c-ret/genetics*

Objective: To investigate the clinicopathological and cytogenetic features of cryptic COL1A1-PDGFB fusion dermatofibrosarcoma protuberans (CC-DFSP). Methods: Three cases of CC-DFSP diagnosed in West China Hospital, Sichuan University, Chengdu, China from January 2021 to September 2021 were studied. Immunohistochemistry for CD34 and other markers, fluorescence in situ hybridization (FISH) for PDGFB, COL1A1-PDGFB and COL1A1, next-generation sequencing (NGS), reverse-transcriptase polymerase chain reaction (RT-PCR) and Sanger sequencing were performed. Results: There were three cases of CC-DFSP, including two females and one male. The patients were 29, 44 and 32 years old, respectively. The sites were abdominal wall, caruncle and scapula. Microscopically, they were poorly circumscribed. The spindle cells of the tumors infiltrated into the whole dermis or subcutaneous tissues, typically arranging in a storiform pattern. Immunohistochemically, the neoplastic cells exhibited diffuse CD34 expression, but were negative for S-100, SMA, and Myogenin. Loss of H3K27me3 was not observed in the tumor cells. The Ki-67 index was 10%-15%. The 3 cases were all negative for PDGFB rearrangement and COL1A1-PDGFB fusion, whereas showing unbalanced rearrangement for COL1A1. Case 1 showed a COL1A1 (exon 31)-PDGFB (exon 2) fusion using NGS, which was further validated through RT-PCR and Sanger sequencing. All patients underwent extended surgical resection. Except for case 3 with recurrence 2 years after surgical resection, the other 2 cases showed no recurrence or metastasis during the follow-up. Conclusions: FISH has shown its validity for detecting PDGFB rearrangement and COL1A1-PDGFB fusion and widely applied in clinical detection. However, for cases with negative routine FISH screening that were highly suspicious for DFSPs, supplementary NGS or at least COL1A1 break-apart FISH screening could be helpful to identify cryptic COL1A1-PDGFB fusions or other variant fusions.
Female ; Humans ; Male ; Collagen Type I, alpha 1 Chain ; Dermatofibrosarcoma/pathology* ; In Situ Hybridization, Fluorescence ; Oncogene Proteins, Fusion/genetics* ; Proto-Oncogene Proteins c-sis/genetics* ; Skin Neoplasms/pathology* ; Adult

Humans ; Protein-Tyrosine Kinases/genetics* ; Proto-Oncogene Proteins/genetics* ; Lung Neoplasms/pathology* ; Mutation ; ErbB Receptors/genetics* ; Oncogene Proteins, Fusion/genetics* ; Gene Rearrangement

OBJECTIVETo investigate effect of AP-1 and Ets binding site adjacent to matrix metalloproteinase-9 (MMP-9) promoter on activation of MMP-9 transcription of nasopharyngeal carcinoma cells transfected with EBV-encoded latent membrane protein 1 (LMP1), and to ascertain if cross-talk between c-Jun and Ets1 is involved in LMP1-regulating expression of MMP-9.

METHODSSite-directed mutagenesis technique was used to establish a series of mutants, including MMP-9-CAT-Ets(-540)mt, MMP-9-CAT-AP-1(-533)mt and MMP-9-CAT-AP-1(-533)/Ets(-540)mt. After the mutants were transfected into LMP1-expressing NPC HNE2 cells regulated by Tet-on system (pTet-on-LMP1 HNE2), CAT activity of these mutants were assayed with induction of LMP1. With blockade of c-Jun or Ets1 antisense oligonucleotides, the activity of MMP-9 induced by LMP1 was assayed with gelatin zymography.

RESULTSThe CAT activity of MMP-9-Ets(-540)mt-CAT, MMP-9-AP-1(-533)mt-CAT, MMP-9-AP-1(-533)/Ets(-540) mt-CAT decreased significantly compared to MMP-9-CAT wt. After blockade with c-Jun or Ets1 antisense oligonucleotides, activity of MMP-9 induced by LMP1 decreased significantly, especially with combined blockade of c-Jun and Ets1.

CONCLUSIONThe results suggest that transcription factor AP-1 and Ets play an crucial role in activation of MMP-9 transcription induced by LMP1, and cross-talk between c-Jun/Ets1 is involved in expression of MMP-9 mediated by LMP1.

Herpesvirus 4, Human ; genetics ; Humans ; Matrix Metalloproteinase 9 ; biosynthesis ; genetics ; Nasopharyngeal Neoplasms ; metabolism ; virology ; Proto-Oncogene Protein c-ets-1 ; genetics ; Proto-Oncogene Proteins c-jun ; genetics ; Transfection ; Tumor Cells, Cultured ; Viral Matrix Proteins ; genetics

OBJECTIVETo elucidate the expression of tanscription factor Ets-1 mediated by EB virus encoded latent membrane protein 1 (LMP1) in nasopharyngeal carcinoma (NPC) cells.

METHODSLMP1-expressing NPC HNE2 cells regulated by Tet-on system (pTet-on-LMP1 HNE2) were used. Expression of LMP1 and Ets-1 was observed after induction with Doxycycline (Dox). Expression of Ets-1 mRNA and protein was detected by RT-PCR and Western blot, respectively. The phosphorylation level of Ets-1 protein was examined by co-immunoprecipitation. The DNA binding activity of Ets-1 was detected by electrophoretic-mobility shift assay (EMSA).

RESULTSAfter induction with Dox in pTet-on-LMP1 HNE2 cells, to some extent, the expression of Ets-1 mRNA and protein, its phosphorylation level and DNA binding activity were increased with enhancement of LMP1 expression.

CONCLUSIONLMP1 induces transcriptional activation and expression of Ets-1 which may contribute to the development of NPC.

Carcinoma, Squamous Cell ; metabolism ; pathology ; virology ; Cell Line, Tumor ; Doxycycline ; pharmacology ; Herpesvirus 4, Human ; Humans ; Nasopharyngeal Neoplasms ; metabolism ; pathology ; virology ; Phosphorylation ; Proto-Oncogene Protein c-ets-1 ; Proto-Oncogene Proteins ; biosynthesis ; genetics ; Proto-Oncogene Proteins c-ets ; RNA, Messenger ; biosynthesis ; genetics ; Transcription Factors ; biosynthesis ; genetics ; Viral Matrix Proteins ; biosynthesis ; genetics ; physiology