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Overexpression of the anti-apoptotic protein BAG3 in human choroidal melanoma: A case report.

ABSTRACT: Bcl-2-associated athanogene 3 (BAG3), a co-chaperone of heat shock protein 70 (HSP70), exerts anti-apoptotic effects in various malignant tumors. However, relationships between choroidal melanoma and BAG3 are poorly studied. This study investigated the expression of BAG3 in a case of human choroidal melanoma. Funduscopy, computed tomography, and single-photon emission computed tomography with the intravenous injection of N-isopropyl-p-[123I] iodoamphetamine strongly indicated choroidal melanoma in a 68-year-old woman. Accordingly, we carried out an enucleation and pathological diagnosis. Proteins and total RNA were extracted from normal retinochoroidal and tumor tissues. Proteins were also extracted from ocular nevus tissues of other patients. We examined the expression of BAG3 protein and mRNA using Western blotting and the real-time quantitative polymerase chain reaction, respectively. Immunohistochemical stains were positive for melan-A, HMB-45, and S-100. Histopathology confirmed a choroidal melanoma. The expression of BAG3 protein and mRNA in the choroidal melanoma tissue was upregulated with respect to both normal retinochoroidal tissue and ocular nevus tissues from other patients. Because BAG3 may inhibit apoptosis of choroidal melanoma and facilitate its survival, overexpression of this gene product may be a prognostic marker and therapeutic target.

SUBMITTER: Yunoki T

PROVIDER: S-EPMC5453117 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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Overexpression of the anti-apoptotic protein BAG3 in human choroidal melanoma: A case report.

Yunoki Tatsuya T Tabuchi Yoshiaki Y Kondo Takashi T Ishii Yoko Y Hayashi Atsushi A

Oncology letters 20170330 6

Bcl-2-associated athanogene 3 (BAG3), a co-chaperone of heat shock protein 70 (HSP70), exerts anti-apoptotic effects in various malignant tumors. However, relationships between choroidal melanoma and BAG3 are poorly studied. This study investigated the expression of BAG3 in a case of human choroidal melanoma. Funduscopy, computed tomography, and single-photon emission computed tomography with the intravenous injection of N-isopropyl-p-[<sup>123</sup>I] iodoamphetamine strongly indicated choroida ...[more]

PMID: 28599417

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Project description:BackgroundPancreatic ductal adenocarcinoma (PDAC) accounts for 90% of all pancreatic carcinomas. Prognosis is poor with a worldwide five-year survival rate of 2-9%. Extent of metastasis is a prognostic factor. Most common metastatic sites include the liver, peritoneum, lung, and bones. We report a case of distant metastasis of PDAC to the left choroid.Case descriptionThis patient is a 59-year-old Caucasian male who initially presented with right flank pain progressing to exercise and activity impairment. Abdominal computed tomography scan showed a pancreatic tail mass subsequently confirmed as PDAC via endoscopic ultrasound with fine needle aspiration. Prior to treatment initiation, patient was referred to ophthalmology for acute vision changes. Evaluation revealed left eye pigmentary changes overlying subretinal fluid (SRF) along with peripheral retinal depigmentation indicative of choroidal metastasis. As of this report submission, patient has completed his initial 6-month course of gemcitabine/paclitaxel protein-bound/cisplatin with partial response. He remains active on his second line of chemotherapy. Visual disturbances and evidence of choroidal metastasis continue to resolve.ConclusionsPDAC is often identified at a late stage, with metastasis or local advancement identified in 80-85% of first diagnoses. This is thought to account for its poor median survival of two to eleven months. The retinal choroid is an extremely rare site of PDAC metastasis, with less than ten cases reported in literature. In this patient, the choroid was the first confirmed metastatic site and represented distant metastasis. Nevertheless, this patient continues to do well and is expected to exceed the upper bound median survival of 11 months following systemic chemotherapy. From this case, we note that distant metastasis prior to treatment initiation may not predict worse prognosis. Systemic chemotherapy was effective in both primary tumor shrinkage as well as regression of choroidal metastasis, leading to improvement in visual symptoms. This suggests that while choroidal metastasis should not be missed in patients with PDAC, systemic chemotherapy may be effective in mitigating collateral symptomatology and thus preserving quality of life.

Dataset Information

Overexpression of the anti-apoptotic protein BAG3 in human choroidal melanoma: A case report.

Publications

Overexpression of the anti-apoptotic protein BAG3 in human choroidal melanoma: A case report.

Similar Datasets

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