The Investigation of ADAMTS16 in Insulin-Induced Human Chondrosarcoma Cells.

OBJECTIVES: A disintegrin-like metalloproteinase with thrombospondin motifs (ADAMTS) is a group of proteins that have enzymatic activity secreted by cells to the outside extracellular matrix. Insulin induces proteoglycan biosynthesis in chondrosarcoma chondrocytes. The purpose of the present in vitro study is to assess the time course effects of insulin on ADAMTS16 expression in OUMS-27 (human chondrosarcoma) cell line to examine whether insulin regulates ADAMTS16 expression as well as proteoglycan biosynthesis with multifaceted properties or not. METHODS: Chondrosarcoma cells were cultured in Dulbecco's modified Eagle's medium having either 10 µg/mL insulin or not. While the experiment was going on, the medium containing insulin had been changed every other day. Cells were harvested at 1st, 3rd, 7th, and 11th days; subsequently, RNA and proteins were isolated in every experimental group according to their time interval. RNA expression of ADAMTS was estimated by quantitative real-time polymerase chain reaction (qRT-PCR) by using primers. Immunoreactive protein levels were encountered by the western blot protein detection technique by using proper anti-ADAMTS16 antibodies. RESULTS: ADAMTS16 mRNA expression level of chondrosarcoma cells was found to be insignificantly decreased in chondrosarcoma cells induced by insulin detected by the qRT-PCR instrument. On the other hand, there was a gradual decrease in immune-reactant ADAMTS16 protein amount by the time course in insulin-treated cell groups when compared with control cells. CONCLUSION: It has been suggested that insulin might possibly regulate ADAMTS16 levels/activities in OUMS-27 chondrosarcoma cells taking a role in extracellular matrix turnover.

Future opportunities in preventing ototoxicity: Caffeic acid phenethyl ester may be a candidate (Review).

Caffeic acid phenethyl ester (CAPE) is an important active component of propolis, which is derived from honeybee hives. It has received increasing attention in a variety of medical and pharmaceutical research, due to its anti­oxidant, antiproliferative, anti­inflammatory, antiviral and antifungal activity, in addition to its antineoplastic properties. Besides the use of CAPE as an antioxidant and anti­inflammatory agent in a number of in vivo studies of ear disease, its beneficial effects have been reported in the treatment of cancer, arthritis, allergies, heart disease, diabetes, kidney disease, liver disease and neurological disease. CAPE influences a number of biochemical pathways, as well as several targets involved in ear diseases, in particular, in ototoxicity. The protective effects of CAPE in ototoxicity, which may be induced by a number factors, including lipopolysaccharides, hydrogen peroxide and streptomycin, are evaluated and discussed in the present review.

Interleukin-1ß induced nuclear factor-κB binds to a disintegrin-like and metalloproteinase with thrombospondin type 1 motif 9 promoter in human chondrosarcoma cells.

Nuclear factor-κB (NF-κB) is involved in the regulation of inflammation­associated genes. NF-κB forms dimers which bind with sequences referred to as NF-κB sites (9-11 bp). A disintegrin-like and metalloproteinase with thrombospondin type 1 motif 9 (ADAMTS9) is a type of proteoglycanase, which proteolytically cleaves versican and aggrecan. ADAMTS9 is a cytokine-inducible gene that contains binding sites for NF-κB within its promoter region. Interleukin-1ß (IL-1ß) affects cartilage metabolism and is involved in the NF-κB pathway. It is therefore hypothesized that NF-κB binding with ADAMTS9 promoters may activate IL-1ß, thereby promoting chondrocytic cell growth. In the present study, the OUMS-27 chondrocytic human chondrosarcoma cell line was treated with IL-1ß with or without inhibitors of NF-κB signaling pathways. Chromatin immunoprecipitation (ChIP) and electromobility shift assays (EMSA) were conducted order to analyze the binding of NF-κB with the ADAMTS9 promoter region. NF-κB-p65 subunit phosphorylation was promoted in IL-1ß-treated cells, which were not treated with inhibitors of NF-κB signaling pathways. By contrast, NF-κB-p65 subunit phosphorylation was inhibited in cells that had been treated with BAY-117085, an NF-κB pathway inhibitor. ChIP and EMSA assays demonstrated that, following treatment with IL-1ß, NF-κB­p65 bound to elements located at -1177 and -1335 in the ADAMTS9 promoter region, in contrast to the untreated samples. The results of the present study suggested that NF-κB may be involved in IL-1ß-induced activation of ADAMTS9 in human chondrocytes.

A comparison of hair and serum trace elements in patients with Alzheimer disease and healthy participants.

BACKGROUND/AIM: To determine whether there was a difference between serum and hair trace elements' concentrations in patients with Alzheimer disease (AD) and healthy participants. MATERIALS AND METHODS: Hair and serum copper, selenium, zinc, magnesium, manganese, and iron levels were measured by inductively coupled plasma-mass spectrometry in patients with AD and healthy participants, and the obtained results were statistically compared. RESULTS: The mean hair selenium and zinc levels of patients with AD were significantly lower than the levels found for control participants (P < 0.05). Patients with AD had significantly higher mean hair copper and manganese levels than the controls. There were no significant differences between AD patients and controls with respect to the hair iron and magnesium levels (P > 0.05). Hair and serum trace element (copper, selenium, zinc, magnesium, manganese, and iron) levels in patients with AD showed no significant difference according to mini mental test scores or sex (P > 0.05). CONCLUSION: Some trace element levels may change in patients with AD. Due to the more permanent status, the analysis of these element levels in hair might be superior to blood analysis.

Caffeic acid phenethyl ester as a protective agent against nephrotoxicity and/or oxidative kidney damage: a detailed systematic review.

Caffeic acid phenethyl ester (CAPE), an active component of propolis, has been attracting the attention of different medical and pharmaceutical disciplines in recent years because of its antioxidant, anti-inflammatory, antiproliferative, cytotoxic, antiviral, antifungal, and antineoplastic properties. One of the most studied organs for the effects of CAPE is the kidney, particularly in the capacity of this ester to decrease the nephrotoxicity induced by several drugs and the oxidative injury after ischemia/reperfusion (I/R). In this review, we summarized and critically evaluated the current knowledge regarding the protective effect of CAPE in nephrotoxicity induced by several special medicines such as cisplatin, doxorubicin, cyclosporine, gentamycin, methotrexate, and other causes leading to oxidative renal injury, namely, I/R models and senility.

Carbon monoxide-related deaths in Ankara between 2001 and 2011.

OBJECTIVE: The aim of the present study was to describe the epidemiology of unintentional carbon monoxide (CO) poisonings (between 2001 and 2011) in Ankara, Turkey. METHODS: Data were collected from the records of Ankara Branch of Council of Forensic Medicine and the licensed official institutes and hospitals for medico-legal autopsies. A total of 10,720 medico-legal autopsy reports were obtained and reviewed by the authors. RESULTS: Among 622 fatal poisoning cases during the period, 380 deaths were due to unintentional CO poisoning. The mean CO saturation of the groups was 55.4 ± 13.4 (% saturation). The minimum and maximum levels of CO in blood was 3.6 and 86.5 (% saturation), respectively. Of all the fatal poisonings determined by Ankara Branch of Council of Forensic Medicine, CO poisoning was the most common mortality cause (61.1%). Among the cases, 301 (79.2%) were found to be death in their houses, 43 (11.3%) in hospitals, 15 (3.9%) in their workplaces and 11 (2.9%) in some public places such as park and garden. Most of the cases were from the capital city of Turkey, Ankara (n = 203, 53.4%). When we compared the cities according to their population, it was realized that the highest death rate due to CO poisoning was in Kirikkale (12.3/100,000), followed by Karabuk (8.3/100,000), Cankiri (7.8/100,000) and Kirsehir (5.0/100,000). DISCUSSION AND CONCLUSION: These findings add new data to the pool of knowledge in terms of the need of safety, proper heating system instructions and more education on CO poisoning in Turkey.