Lipoprotein status among urban populations in Bangladesh

ObjectiveSerum lipoprotein is the most important predictor for microvascular diseases, and may be influenced by rapid urbanization. Currently available data are limited, particularly regarding age-specific lipoprotein status in urban Bangladeshi populations.MethodsBlood lipoprotein levels of 51,353 male and female individuals primarily residing in urban Bangladesh were analyzed. De-identified data (collected between January 2005 and December 2011) were extracted from the Clinical Biochemistry Laboratory Data Archive of International Centre for Diarrheal Disease Research, Bangladesh (icddr,b). For analyses, six age categories were created: (i) <20 years, n = 481; (ii) 20–29 years, n = 1602; (iii) 30–39 years, n = 7272; (iv) 40–49 years, n = 13,582; (v) 50–59 years, n = 15,890; and (vi) 60 years and more, n = 12,526.ResultsMean serum levels of TC, LDL, TG, LDL:HDL and TC:HDL were significantly higher among adults 30–39 years old compared to other age groups, regardless of sex. The proportion of high TC and LDL from 2005 to 2011 among individuals aged 30–39 years old varied widely (p < 0.01 for trend and all pairwise tests).Conclusion30–39 years old individuals had higher concentration of lipoprotein, which increases microvascular disease risk. Further population-based studies are needed to validate our observations in rural areas of Bangladesh.     

Effect of birth weight on adulthood renal function: A bias‐adjusted meta‐analytic approach

While the association between low birth weight (LBW; <2500 g) and development of adult chronic renal disease (CKD) is inconsistently reported, less information is available regarding association of high birth weight (HBW; ≥4000 g) with CKD. We undertook a systematic review and meta‐analysis on studies published before 30 September 2015 and report associations between birth weight and renal function. Blood (glomerular filtration rate (GFR)) and urine (microalbuminuria/albumin excreation rate (AER)/urinary albumin creatinine ratio (ACR)) parameters were used to define CKD. Three different effect size estimates were used (odds ratio, regression coefficient and mean difference). The odds of developing CKD in the life course among those born LBW was 1.77 (95% CI: 1.42, 2.20) times and 1.68 (1.27, 2.33) times, assessed by blood and urine parameters respectively. Higher risk was also observed among Asian and Australian populations (blood: OR 2.68; urine: OR 2.28), individuals aged ≤30 years (blood: OR 2.30; urine: OR 1.26), and ≥50 years (blood: OR 3.66; urine: OR 3.10), people with diabetes (blood: OR 2.51), and aborigines (urine: OR 2.32). There was no significant association between HBW and CKD. For every 1 kg increase in BW, the estimated GFR increased by 2.09 mL/min per 1.73 m² (1.33–2.85), and it was negatively associated with LogACR (ß ?0.07, 95% CI: ?0.14, 0.00). LBW inborn had lower mean GFR ?4.62 (?7.10, ?2.14) compared with normal BW. Findings of this study suggest that LBW increased the risk of developing CKD, and HBW did not show any significant impact.     

Mucosal and systemic immune responses in patients with diarrhea due to CS6-expressing enterotoxigenic Escherichia coli

Colonization factor CS6 expressed by enterotoxigenic Escherichia coli (ETEC) is a nonfimbrial polymeric protein. A substantial proportion of ETEC strains isolated from patients in endemic settings and in people who travel to regions where ETEC is endemic are ETEC strains expressing CS6, either alone or in combination with fimbrial colonization factor CS5 or CS4. However, relatively little is known about the natural immune responses elicited against CS6 expressed by ETEC strains causing disease. We studied patients who were hospitalized with diarrhea (n = 46) caused by CS6-expressing ETEC (ETEC expressing CS6 or CS5 plus CS6) and had a disease spectrum ranging from severe dehydration (27%) to moderate or mild dehydration (73%). Using recombinant CS6 antigen, we found that more than 90% of the patients had mucosal immune responses to CS6 expressed as immunoglobulin (IgA) antibody-secreting cells (ASC) or antibody in lymphocyte supernatant (ALS) and that about 57% responded with CS6-specific IgA antibodies in feces. More than 80% of the patients showed IgA seroconversion to CS6. Significant increases in the levels of anti-CS6 antibodies of the IgG isotype were also observed in assays for ASC (75%), ALS (100%), and serum (70%). These studies demonstrated that patients hospitalized with the noninvasive enteric pathogen CS6-expressing ETEC responded with both mucosal and systemic antibodies against CS6. Studies are needed to determine if the anti-CS6 responses protect against reinfection and if protective levels of CS6 immunity are induced by vaccination.     

Perfusion with carbon monoxide does not affect extracellular glutamate in dialysates of the hippocampus of freely moving mice

Carbon monoxide (CO) produces several neurological effects, including cognitive, mood, and behavioral disturbance. Glutamate is thought to play a particularly important role in learning and memory. Thus, the present study was aimed at investigating the local effect of CO on the glutamate level in the hippocampus of mice using in vivo reverse microdialysis. Mice were perfused with Ringer’s solution (control) or CO (60–125?μM) in Ringer’s solution into the hippocampus via microdialysis probe. Dialysate samples were collected every 20?min, and then analyzed with high-performance liquid chromatography coupled to an electrochemical detector. The result revealed that the perfusion with CO had no significant effect on glutamate levels (p?=?0.316) as compared to the control group. This finding does not support a local CO rise as the cause of the increased glutamate level in the hippocampus of mice.     

Effects of early life adversity on immune function and cognitive performance: results from the ALSPAC cohort

Social Psychiatry and Psychiatric Epidemiology - Early life adversity (ELA) is a significant risk factor for mental health disorders. One hypothesised mechanism by which this occurs is via an...     

Knowledge on,and attitude toward,HIV/AIDS among staff of an international organization in Bangladesh

Two hundred and ninety-three randomly-selected members of the staff of ICDDR,B: Centre for Health and Population Research were surveyed anonymously in June 1998, using a pre-tested and self-administered questionnaire, to assess their knowledge on, and attitude toward, human immunodeficiency virus (HIV)/acquired immunodeficiency syndrome (AIDS). All except 4 (1.4%) heard of AIDS. Main sources of information were radio and television (93%), newspapers and magazines (84.8%), posters and leaflets (70.2%), and friends (59.2%). About 94% of the respondents believed that HIV might spread in Bangladesh. Only 61.6% knew about the causative agent for AIDS. More than 96% had knowledge that HIV could be detected through blood test. The respondents were aware that unprotected sexual intercourse (92%), transfusion of blood and blood components (93.8%), sharing unsterile needles for injections (94.1%), and delivery of babies by infected mothers (82.7%) could transmit HIV. Similarly, the respondents had the knowledge that HIV infection could be prevented by using condom during sexual intercourse (85.5%), having sex only with an HIV-negative faithful partner (87.2%), avoiding transfusion of blood not screened for HIV (88.9%), and taking injections with sterile needles (86.5%). However, only 33.0% had the knowledge that HIV-infected persons can look healthy, and 56.4% were unaware of transmission through breastmilk. Most members of the staff, particularly at lower level, had misconceptions about transmission and prevention of HIV/AIDS. More than 40% of the respondents had the attitude that HIV-infected persons should not be allowed to work, while another 10% did not have any idea about it. The findings of the study suggest that the members of the Centre's staff have a satisfactory level of essential knowledge on HIV/AIDS, although half of them have poor attitudes toward persons with HIV/AIDS. Therefore, preventive strategy for the staff should be directed toward behaviour change communication.     

Different blood acetaldehyde concentration following ethanol administration in a newly developed high alcohol preference and low alcohol preference rat model system

A significant difference in blood-acetaldehyde concentration was observed between high alcohol-preference (HAP) rats and low alcohol-preference (LAP) rats, newly developed different alcohol preference lines. This difference of acetaldehyde accumulation may be due to cytosolic aldehyde dehydrogenase (ALDH1) polymorphism, which has been reported previously. As the doses of ethanol we employed are higher than that of voluntary drinking, there may be little direct relationship between acetaldehyde accumulation and alcohol preference. We suggest therefore that the ALDH1 polymorphism is associated with alcohol preference in HAP/LAP lines through some other unidentified mechanism.     

Gender-specific protective effect of hemoglobin on arsenic-induced skin lesions.

Chronic arsenic poisoning remains a public health crisis in Bangladesh. As arsenic has been shown to bind to human hemoglobin (Hb), hematologic mechanisms may play a role in the pathway through which arsenic exerts its toxicity. Two separate studies, a case-control and a cohort, were conducted to investigate the role of Hb in the development of arsenic-induced skin lesions. In the first, conditional logistic regression was used to investigate the effect of Hb on skin lesions among 900 case-control pairs from Pabna, Bangladesh, in which individuals were matched on gender, age, and location. In the second, mixed linear regression models were used to examine the association between toenail arsenic, urinary arsenic, and Hb within a cohort of 184 individuals from 50 families in the same region who did not have arsenic-induced skin lesions. Hb was significantly associated with skin lesions but this association was gender specific. In males, a 40% reduction in the odds of skin lesions occurred for every 1 g/dL increase in Hb (odds ratio, 0.60; 95% confidence interval, 0.49-0.73). No effect was observed for females (odds ratio, 1.16; 95% confidence interval, 0.92-1.46). In the cohort of 184 individuals, no associations between toenail arsenic or urinary arsenic species and Hb levels were observed. Low Hb levels may exacerbate the detrimental health effects of chronic arsenic poisoning. Whereas providing clean water remains the optimal solution to Bangladesh's problem of arsenic poisoning, improving nutrition and reducing iron-deficiency anemia may ameliorate negative health effects, such as skin lesions in individuals who have been exposed.