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Background: Metformin is the first-line drug in the treatment of type 2 diabetes mellitus. Monitoring vitamin B 12 deficiency associated with long-term and high-dose therapy is not a common practice in many clinical settings in Ethiopia. Objective: The study aimed to measure levels of serum vitamin B 12 and folate and to assess the macrocytic status of type 2 diabetes mellitus patients on metformin. Methods: A cross-sectional study was conducted on 80 type 2 diabetes mellitus patients who had been on metformin for 5 months or more at the diabetic clinic of Tikur Anbessa Specialized Teaching Hospital. Serum vitamin B 12 and folate levels were quantified by chemiluminescent immunoassays. Mean corpuscular volume was determined by complete blood count. Differences in vitamin B 12 and folate levels and mean corpuscular volume between different groups were assessed using Kruskal–Wallis H and Mann–Whitney U tests. Results: Vitamin B 12 and folate deficiency were documented in 5% and 23.8% of participants, respectively, and 6.2% of patients were macrocytic. Levels of vitamin B 12 and folate in patients who had been on metformin > 1,500 mg/day ≥ 4 years were significantly lower those who had been on metformin 1,000– 1,500 mg/day and < 1,000 mg/day < 4 years, respectively. Conclusion: Low serum vitamin B 12 and folate levels and macrocytosis were found to be associated with prolonged metformin treatment. [ABSTRACT FROM AUTHOR]

Background: Prior to clinical trials of new tuberculosis (TB) drugs or therapeutic vaccines, it is necessary to develop monitoring tools to predict treatment outcomes in TB patients. Methods: Micronutrients concentration level was determined from a total of 262 study participants with five clinical groups: 57 TB patients coinfected with HIV (HIV+TB+), 87 active TB Patients (TB cases), 71 HIV infected without active and latent TB infection (HIV+TST-), 22 latent TB infection (TST+) and 25 healthy controls (TST-). Vitamin A concentration was measured using high-performance liquid chromatography (HPLC), whereas iron and vitamin B12 concentrations were measured using Cobas® 6000 analyzer. Result: The serum concentration levels of iron, vitamin A and vitamin B12 had a significant difference between active TB and latent (LTBI) or healthy controls. Six months after treatment, the serum concentration levels of vitamin A, vitamin B12 and iron in tuberculosis became indistinguishable from the levels of LTBIs and healthy control individuals. The concentration levels of iron and vitamin B12 in HIV+TB+patients at the end of TB treatment were normalized to the levels observed in healthy controls (TST–) regardless of HAART treatment. However, the concentration level of vitamin A in HIV+TB+patients HAART untreated at the end of TB treatment was not normalized to the levels observed in healthy controls (TST–) or HAART untreated HIV+TST–. Conclusion: Detecting serum concentration levels of vitamin B12 and vitamin A might be used as a biomarker of the diagnostic method of active TB regardless of HIV-infected individuals. Moreover, detecting serum concentration of vitamin B12 might also be used for TB treatment responses monitoring biomarker in TB-HIV-co-infected individuals regardless of HAART (in)eligibility and therapy. [ABSTRACT FROM AUTHOR]

Background: The exact cause of brain tumours is still unknown, but disruptions of redox balance are thought to play a significant role in all stages of brain tumour development. However, the roles of free radical imbalance at different grades of brain tumour and degree of oxidative stress before and after surgery have not been addressed in prior studies. Aim: A comparative cross-sectional study was conducted to assess the redox imbalance among confirmed brain tumour patients. Methods and results: An institution-based comparative cross-sectional study was conducted on a total of 100 participants (50 brain tumour patients and 50 controls) at referral hospitals in Addis Ababa, Ethiopia. Descriptive statistics, t-test and analysis of variance (ANOVA) (post-hoc) analysis were used and statistical significance was declared at p ≤ 0.05. The serum oxidised glutathione and total oxidative stress were significantly higher in the serum of brain tumour patients (0.72 ± 0.03 μM/μg and 9.66 ± 1.76 μmol H2O2 Eq/L, respectively) compared to the control group (0.21 ± 0.07 μM/μg and 6.59 ± 0.81 μmol H2O2 Eq/L, respectively) (p ≤ 0.05). The serum total oxidant status gradually increased as the tumour grade increased, being higher in grade four (11.96 ± 0.72) and lower in grade one (8.43 ± 1.56), and the mean differences were statistically significant (p ≤ 0 05). A statistically significantly higher total antioxidant capacity (116.78 ± 5.03 Trolox Eq/L) was obtained in the post-surgery than pre-surgery level (79.65 ± 17.914 Trolox Eq/L) (p ≤ 0 05). Conclusion: Higher oxidant and lower antioxidant levels were found in the serum of brain tumour patients than in the control group. The post-surgery oxidant level was lower than the pre-surgery state. The findings of this study could suggest that redox imbalance may have a role in the pathophysiology of brain tumours, but further experimental studies are needed. [ABSTRACT FROM AUTHOR]

Background: Metformin is the first-line drug in the treatment of type 2 diabetes mellitus. Monitoring vitamin B 12 deficiency associated with long-term and high-dose therapy is not a common practice in many clinical settings in Ethiopia., Objective: The study aimed to measure levels of serum vitamin B 12 and folate and to assess the macrocytic status of type 2 diabetes mellitus patients on metformin., Methods: A cross-sectional study was conducted on 80 type 2 diabetes mellitus patients who had been on metformin for 5 months or more at the diabetic clinic of Tikur Anbessa Specialized Teaching Hospital. Serum vitamin B 12 and folate levels were quantified by chemiluminescent immunoassays. Mean corpuscular volume was determined by complete blood count. Differences in vitamin B 12 and folate levels and mean corpuscular volume between different groups were assessed using Kruskal-Wallis H and Mann-Whitney U tests., Results: Vitamin B 12 and folate deficiency were documented in 5% and 23.8% of participants, respectively, and 6.2% of patients were macrocytic. Levels of vitamin B 12 and folate in patients who had been on metformin >1,500 mg/day ≥4 years were significantly lower those who had been on metformin 1,000-1,500 mg/day and <1,000 mg/day <4 years, respectively., Conclusion: Low serum vitamin B 12 and folate levels and macrocytosis were found to be associated with prolonged metformin treatment., Competing Interests: The authors declare that they have no conflicts of interest for this work., (© 2021 Wale Tesega et al.)

Background: Serum indices (SI) including hemolyzed, lipemic, and icteric samples, affects the accuracy of test result. The aim of this study was to evaluate SI values done by visual inspections and potential false result risks by comparing with actual measurements done by Cobas 6000 Chemistry analyzer at Ethiopian Public Health Institute (EPHI), Addis Ababa, Ethiopia., Methods: An observational, cross-sectional study was conducted from April to May 2017 on samples referred to Clinical Chemistry laboratory of EPHI, Ethiopia. These samples SI values, after visual inspection by three trained observers, was analyzed again on Roche Cobas 6000 analyzer (RCA). The generated data was analyzed by using weighted kappa methods on STAT statistical software version 20., Results: From a total of 1509 samples, SI values identified by the RCA as hemolysis, icteric, and lipemic were 933 (62%), 74(5%) and 59(4%) respectively. The SI average weighted kappa between RCA and visual inspection were: 0.1870, 0.3421, and 0.1259 for hemolysis, icteric, and lipemic samples, respectively. Combined inter-observers variability among observers for hemolysis, Icterus, and lipemic samples were 0.4758, 0.3258, and 0.3628 respectively. The best agreement among observers was in the case of hemolysis (0 grades), while the lowest agreement was observed in the case of icterus (+3 grades). In addition, test parameters, such as CK-MB (22%), and LDH (20%) were falsely accepted, whereas Cl - and Na+ (up to 25%) were falsely rejected tests by observers. On the other hand, results rejected by Cobas SI assessments included CK-MB (22%), LDH (20%), and BIL-D (4%)., Conclusion: Visual inspection of SI showed poorly agreement with automated system. Thus, there is genuine need for more training of Laboratory professionals on identification of SI, and as much as possible SI should be done by automated system to improve quality of test results., (Copyright © 2019 International Federation of Clinical Chemistry and Laboratory Medicine (IFCC). All rights reserved.)

Background: Prior to clinical trials of new tuberculosis (TB) drugs or therapeutic vaccines, it is necessary to develop monitoring tools to predict treatment outcomes in TB patients., Methods: Micronutrients concentration level was determined from a total of 262 study participants with five clinical groups: 57 TB patients coinfected with HIV (HIV+TB+), 87 active TB Patients (TB cases), 71 HIV infected without active and latent TB infection (HIV+TST-), 22 latent TB infection (TST+) and 25 healthy controls (TST-). Vitamin A concentration was measured using high-performance liquid chromatography (HPLC), whereas iron and vitamin B 12 concentrations were measured using Cobas ® 6000 analyzer., Result: The serum concentration levels of iron, vitamin A and vitamin B 12 had a significant difference between active TB and latent (LTBI) or healthy controls. Six months after treatment, the serum concentration levels of vitamin A, vitamin B 12 and iron in tuberculosis became indistinguishable from the levels of LTBIs and healthy control individuals. The concentration levels of iron and vitamin B 12 in HIV+TB+patients at the end of TB treatment were normalized to the levels observed in healthy controls (TST-) regardless of HAART treatment. However, the concentration level of vitamin A in HIV+TB+patients HAART untreated at the end of TB treatment was not normalized to the levels observed in healthy controls (TST-) or HAART untreated HIV+TST-., Conclusion: Detecting serum concentration levels of vitamin B 12 and vitamin A might be used as a biomarker of the diagnostic method of active TB regardless of HIV-infected individuals. Moreover, detecting serum concentration of vitamin B 12 might also be used for TB treatment responses monitoring biomarker in TB-HIV-co-infected individuals regardless of HAART (in)eligibility and therapy., Competing Interests: The authors report no conflicts of interest in this work., (© 2019 Gebremicael et al.)