Comparison of HbA1c analysers: Agilent 1100 HPLC using kits produced by Gordion Diagnostic (Turkey) with Premier Hb9210 using kits produced by Trinity Biotech (USA) in different patient groups

BACKGROUND

The aim of this study was to compare the performance of Agilent 1100 HPLC analyser using HbA1c kits manufactured by Gordion Diagnostic (Turkey) with that of Premier Hb9210 using the original kits for the measurement of HbA1c in different patient groups.

METHODS

Subjects were divided into four groups: Group 1 included 140 diabetic and non-diabetic subjects with normal urea and haemoglobin levels; Group 2 included 84 diabetic and non-diabetic subjects with high urea levels; Group 3 included 44 diabetic and non-diabetic subjects with iron deficiency anaemia; and Group 4 included 52 diabetic and non-diabetic subjects with high haemoglobin levels. EP Evaluator Release 8 program was used to evaluate the resultant data.

RESULTS

According to the comparison results of the two methods in all groups, there was an excellent correlation between the two methods (R>0.98). Moderate-low correlation was found between increased urea concentration and the difference of the two methods (R= -0.374, p = 0.0005). The difference between the methods was found to be increased with increased urea concentrations. This difference, although statistically significant, was within the permitted limits. The observed correlation between the difference of the two methods and the low and high haemoglobin concentrations was statistically non-significant (R = 0.149, p = 0.3343; R = 0.263, p = 0.0594).

CONCLUSIONS

We found that Agilent 1100 HbA1c analyser and Gordions' HbA1c kit comply with the clinical requirements and are suitable for HbA1c analysis at high levels of urea and Hb and low levels of Hb in diabetic and non-diabetic patients.

Serum levels of nitrate, nitrite and advanced oxidation protein products (AOPP) in patients with nonalcoholic fatty liver disease

BACKGROUND

Oxidative stress is increased and anti-oxidant defense mechanisms are impaired in patients with hepatosteatosis. The aim of the present study was to evaluate the serum levels of several oxidant and anti-oxidant markers in patients with nonalcoholic fatty liver disease (NAFLD).

PATIENTS AND METHODS

Thirty-four patients with NAFLD, and 19 healthy controls were included. In this study, we measured serum nitrate and advanced oxidation protein product (AOPP) as the oxidizing products and nitrite as the anti-oxidizing marker. Nitrate and nitrite levels were measured using a calorimetric method, and levels of serum AOPP were measured by a spectrophotometric method using a commercial ELISA kit.

RESULTS

Serum nitrate and AOPP levels were significantly higher in the NAFLD group compared to the control group. Serum nitrite and N-N levels were similar between the two groups. Serum nitrate and N-N levels were found to be significantly higher in patients with elevated ALT levels compared to patients with normal ALT levels. Serum nitrite and AOPP levels were comparable between these groups. Mean platelet volume (MPV) was significantly lower in the NAFLD group compared to the control group.

CONCLUSIONS

Serum levels of oxidizing agents including nitrate and AOPP increase in patients with NAFLD. In contrast, serum nitrite, an antioxidant agent, does not adequately increase to compensate for the oxidizing effects in these patients.

Association of collagen type I alpha 1 gene polymorphism with inguinal hernia

PURPOSE

A positive family history is an important risk factor for inguinal hernia development, suggesting a genetic trait for hernia disease. However, gene mutations responsible for abdominal wall hernia formation in humans have not yet been studied. We aimed to evaluate whether the functional Sp1 binding site polymorphism within intron 1 of the collagen type I, alpha 1 (COL1A1) gene was associated specifically with inguinal hernia disease.

METHODS

85 participants with surgically diagnosed inguinal hernia disease, and 82 physically active controls without any history of connective tissue disease and hernia were recruited for this case-control genetic association study. Polymerase chain reaction and restriction fragment length polymorphism and agarose gel electrophoresis techniques were used to detect these polymorphisms.

RESULTS

Significantly, more patients gave a positive family history for an inguinal hernia compared to healthy controls (OR 3.646, 95 % CI 1.375-9.670, P = 0.006). COL1A1 Sp1 SNP (rs 1800012) was identified. Results demostrated statistically significant deviation from HWE for cases (P = 0.007), but not for the controls (P = 0.276). Our results revealed an increased frequency of COL1A1 Sp1 Ss genotype in inguinal hernia patients (OR 3.593, 95 % CI 1.867-6.915, P = 0.000).

CONCLUSIONS

This results suggest that polymorphism of the COL1A1 Sp1 binding site is associated with an increased risk for developing inguinal hernias. So, rs 1800012 locus is a potential candidate region for susceptibility in molecular mechanism of inguinal hernia pathophysiology.

Combination of alkaline and microwave pretreatment for disintegration of meat processing wastewater sludge

Meat processing wastewater sludge has high organic content but it is very slow to degrade in biological processes. Anaerobic digestion may be a good alternative for this type of sludge when the hydrolysis, known to be the rate-limiting step of biological sludge anaerobic degradation, could be eliminated by disintegration. This investigation deals with disintegration of meat processing wastewater sludge. Microwave (MW) irradiation and combined alkaline pretreatment and MW irradiation were applied to sludge for disintegration purposes. Disintegration performance of the methods was evaluated with disintegration degree based on total and dissolved organic carbon calculations (DD(TOC)), and the solubilization of volatile solids (S(VS)) in the pretreated sludge. Optimum conditions were found to be 140 degrees C and 30 min for MW irradiation using response surface methodology (RSM) and pH = 13 for combined pretreatment. While DD(TOC) was observed as 24.6% and 54.9, S(VS) was determined as 8.54% and 42.5% for MW pretreated and combined pretreated sludge, respectively. The results clearly show that pre-conditioning of sludge with alkaline pretreatment played an important role in enhancing the disintegration efficiency of subsequent MW irradiation. Disintegration methods also affected the anaerobic biodegradability and dewaterability of sludge. An increase of 23.6% in biogas production in MW irradiated sludge was obtained, comparing to the raw sludge at the end of the 35 days of incubation. This increase was observed as 44.5% combined pretreatment application. While MW pretreatment led to a little improvement of the dewatering performance of sludge, in combined pretreatment NaOH deteriorates the sludge dewaterability.

The anticancer mechanism of caffeic acid phenethyl ester (CAPE): review of melanomas, lung and prostate cancers

BACKGROUND

Caffeic acid phenethyl ester (CAPE), an active component of propolis extract, specifically inhibits NF-κB. It exhibits antioxidant, antiinflammatory, antiproliferative, cytostatic, and most importantly, antineoplastic properties.

AIM

The aim of the present mini-review is to summarize and evaluate the anticancer mechanism of CAPE with examples of several cancer types.

RESULTS

In view of the mechanisms and findings in our laboratory and those of others in literature, we suggest that CAPE possess anticancer and apoptosis inducing activities.

CONCLUSIONS

Further researches are needed regarding the anticancer basis of CAPE in all disciplines of medicine. Also, clinical potential toxicities of CAPE should be revealed if it is going to be used as an anticancer agent.

Evaluation of carotid intima media thickness in impaired fasting glucose and impaired glucose tolerance

AIM

Increased carotid intima media thickness (CIMT) is recognized as the early indicator of atherosclerosis. We aimed to evaluate the effect of impaired fasting glucose (IFG) and impaired glucose tolerance (IGT) on the CIMT.

METHODS

We evaluated 51 dysglycemic patients (IFG [N.=22]; IGT [N.=29]) and 25 controls who have similar age and gender. Patients who were known to have coronary heart disease, cerebrovascular disease, hypertension, hyperlipidemia, diabetes mellitus and hypo-hyperthyrodism were excluded. We measured fasting blood glucose (FBG), postprandial blood glucose (PPG), insulin, insulin resistance, lipid profile, hsCRP, microalbuminuria, and glycosylated hemoglobin A1c (HbA1c). We measured the CIMT by Doppler ultrasonography.

RESULTS

Both IFG and IGT patients have increased CIMT according to controls (P<0.001). Mean CIMT of IFG, IGT and control were 0.704, 0.738 and 0.555 respectively. There were no differences in point of fasting insulin and HOMA-IR between IFG and IGT. There were positive correlation of CIMT and FBG, PPG, HbA1c, fasting insulin and HOMA-IR in both groups. In linear regression analysis, PPG and HbA1c is the major factor affecting CIMT (t=0.017 and 0.036).

CONCLUSION

IFG and IGT have increased CIMT according to controls, and PPG and HbA1c are the major affecting factors to CIMT.

Decolorization of a baker's yeast industry effluent by Fenton oxidation

Baker's yeast industry is an important industry in Turkey. Molasses is used as a raw material, which is an end product of sugar industry. Baker's yeast industry effluents contain various pollutants and are generally characterized with high chemical oxygen demand (COD), TKN, dark color and non-biodegradable organic pollutants. The objective of this study was to investigate the decolorization and the removal of non-biodegradable organic pollutants measured as mainly DOC, SUVA(254), SUVA(280) and COD parameters. Fenton oxidation was applied to biologically pre-treated effluent of full-scale wastewater treatment plant. Jar test method was used to determine the best operating conditions. The 600 mg/L H(2)O(2)/600 mg/L Fe(2+) dosage was quite enough to obtain a high color removal efficiency of 97%. However, the best Fe(2+)/H(2)O(2) dosage was 1200 mg/L Fe(2+)/800 mg/L H(2)O(2) at pH 4 and in reaction time of 20 min for mineralization of DOC and COD. For these conditions, the maximum color removal efficiency was obtained as 99%, maximum DOC and COD removal efficiencies were obtained as 90 and 88%, respectively. Also, SUVA(254) and SUVA(280) values decreased.