The International Journal of Romanian Society of Endocrinology / Registered in 1938

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  • Perspectives

    Jiang L, Wei R, Diao J, Ding H, Wang W, Ao R

    Proteomics of Tear in Inactive Thyroid-Associated Ophthalmopathy

    Acta Endo (Buc) 2021 17(3): 291-303 doi: 10.4183/aeb.2021.291

    Background. Thyroid-associated ophthalmopathy (TAO), one of the most common orbital diseases in adults, seriously reduces patients’ quality of life. Although human tear proteomics identified many abnormal expressed proteins and proposed several pathogeneses of TAO, most of these studies focused on the active stage or mixed types in TAO. In this study we identified significantly changed proteins and preliminary revealed the potential signalling pathways and mechanisms of TAO with the late, inactive stage. Patients and Methods. Tears from TAO patients (n=6) with a CAS score < 3 and 6 control healthy subject were collected. The pooled tears were further fractionated using high pH reversed-phase chromatography, then submitted to LC-MS/MS and subsequent bioinformatic analysis. Results. Proteomic profiling identified 107 significantly changed proteins between the inactive stage of TAO patients and healthy cases. Among these proteins, 62 were upregulated, and 45 were downregulated in TAO cases compared to healthy individuals. Enrichment analysis revealed that the immune system, cell cycle, metabolism (carbohydrate metabolism and metabolism of cofactors and vitamins), protein synthesis and degradation might play a vital role in the progress of inactive TAO. The present investigation represents the first proteomic tear study of TAO patients in the inactive stage. Conclusion. The results shed light on the differences between inactive TAO patients and healthy cases, thus enabling us to understand better the molecular mechanisms and potential targets for the treatment of inactive TAO.
  • General Endocrinology

    Gong Z, Yuan Z, Niu Y, Zhang X, Geng J, Wei S

    Carbonated Beverages Affect Levels of Androgen Receptor and Testosterone Secretion in Mice

    Acta Endo (Buc) 2022 18(3): 301-305 doi: 10.4183/aeb.2022.301

    Objectives. This work aimed to study the influences of carbonated beverages (CBs) on the testis growth and the expression levels of androgen receptor (AR) of mice. Methods. Two experimental groups of 30 mice each PEP-1 and PEP-2 drank 50% and 100% Pepsi-Cola, respectively for 15 days. Other 2 experimental groups of 30 mice each COC-1 and COC-2 drank 50% and 100% Coca- Cola, respectively for 15 days. The control group (CG) of 30 mice drank water. Bilateral testes were harvested aseptically on days 0, 5, 7, 10, 13 and 15. Real-time PCR and Western blot were implemented to detect levels of androgen receptor (AR) mRNA and protein in testis tissues. Results. Testes masses of PEP-2, COC-1 and COC-2 were greater than those of PEP-1 and CG (P < 0.05). On day 15, testis longitudinal diameter (TLD) of CBs-treated mice was increased as compared to CG. TLD, testes transverse diameters (TTD) and AR proteins levels of PEP-2 and COC-2 were increased in comparison with CG (P<0.05). Serum testosterone concentrations of PEP-2 were higher than that of COC-1 and CG (P < 0.05). Levels of AR mRNAs of four CBs-treated mice were increased by 60.18%, 67.26%, 65.93% and 78.76%. Conclusions. A high concentration of Coca-Cola and Pepsi-Cola could raise TLD and TDD, enhance testosterone secretion, and increase serum EGF concentrations.
  • Images in Endocrinology

    Du X, Cao D, Yan F, Gao Y, Chang H, Wei B

    Clinicopathological Characteristics of Mucinous Variant of Anaplastic Thyroid Carcinoma

    Acta Endo (Buc) 2020 16(3): 377-378 doi: 10.4183/aeb.2020.377

  • Perspectives

    Du X, Wang L, Shen B, He H, Chang H, Wei B

    Clinical Significance of PD-L1 Expression in Parathyroid Cancer

    Acta Endo (Buc) 2016 12(4): 383-386 doi: 10.4183/aeb.2016.383

    5% of all cases of primary hyperparathyroidism and it is an exceedingly rare endocrine malignancy first described in 1933. Most experts recommend en bloc excision at initial surgery as the only chance for its cure. Both chemotherapy and radiotherapy have not been demonstrated to be beneficial in parathyroid carcinoma. Some patients have multiple recurrences or metastases. Therefore, new therapies are urgently needed. Inhibition of the interaction between Programmed Death Receptor 1 (PD-1) and Programmed Death Receptor Ligand 1 (PD-L1) enhances T-cell responses in vitro and mediates clinical antitumour activity. Aim. We analysed the expression of PD-L1 in parathyroid cancer to evaluate its potential as target for immunotherapeutic strategy. Subjects and methods. A cohort of 18 patients were diagnosed with primary or metastatic parathyroid cancer. Immunohistochemistry was performed in 18 formalin-fixed paraffin-embedded specimens using a rabbit monoclonal antibody. A 5% cut-off value was applied for PD-L1 positivity. Results. The anti PD-L1 antibody showed a predominantly membranous staining pattern in parathyroid cancer cells. Programmed Death Receptor Ligand-1 expression was found in 22.2% of all parathyroid carcinoma cases. There was no correlation between the expression of PD-L1 with lymph node metastasis, gender and age (P> 0.05). Conclusion. This expression of PD-L1 in human parathyroid cancer suggests that patients with parathyroid cancer could profit from immunotherapeutic strategies using anti-PDL1 antibodies.
  • General Endocrinology

    Wei S, Liu K, Wu H, Hu J, He J, Li G, Liu B, Yang W

    MT2 Inhibits Osteoclastogenesis by Scavenging Ros

    Acta Endo (Buc) 2023 19(4): 447-455 doi: 10.4183/aeb.2023.447

    Context and objective. Reactive oxygen species (ROS) produced under oxidative stress is important for osteoclastogenesis. As a major member of the metallothionein (MT) family, metallothionein2 (MT2) can scavenge ROS in osteoblasts. However, the role of MT2 in osteoclastogenesis and ROS production in osteoclast precursors (OCPs) is unknown. Material and methods. In this study, we first investigated MT2 expression level in osteoporotic model mice. Next, we explored the roles of MT2 in osteoclastic differentiation and ROS production in OCPs. Ultimately, via rescue assays based on hydrogen peroxide (H2O2), the significance of ROS in MT-2-regulated osteoclastic differentiation was further elucidated. Results. Compared with sham operated (Sham) mice, ovariectomized (OVX) mice displayed bone marrow primary OCPs (Ly6C+CD11b-) having higher ROS levels and lower MT2 expression. MT2 overexpression inhibited the formation of mature osteoclasts, while MT2 knockdown was contrary. Moreover, MT2 overexpression inhibited ROS production in OCPs, while MT2 knockdown exhibited the opposite effects. Notably, the inhibitory effect of MT2 overexpression on osteoclastogenesis and ROS production was blocked by the addition of H2O2. Conclusion. MT2 inhibits osteoclastogenesis through repressing ROS production in OCPs, which indicates that the strategy of upregulating MT2 in OCPs may be applied to the clinical treatment of osteoclastic bone loss.
  • Case Report

    Ma J, Ren F, Wei S, Li J

    Localized Xanthomatosis of Oral Mucosa in a Patient with Cushing’s Disease

    Acta Endo (Buc) 2013 9(4): 631-636 doi: 10.4183/aeb.2013.631

    Xanthomatosis is a rare disease; predominantly, it is a response to altered lipid levels in the form of a mucocutaneous granulomatous proliferative disorder of unclear origin. When blood lipid levels exceed the normal values, the macrophages around the blood vessels may result in xanthoma. The present case was observed in a 55-year-old woman who suffered from Cushing’s disease and had atypical xanthomas in her oral mucosa that were diagnosed by histopathological analysis and were associated with normal serum cholesterol levels.