Recently Published Articles
Vascular Damage in Newly Diagnosed Young Hypertensive Patients, Assessed by Carotid Intima Media Thickness: An Indian Perspective
Abstract:
Western studies have shown that hypertension increases carotid intima media thickness (cIMT) as early as in childhood and adolescence. However, similar data from India is lacking. Indians have different genetic, racial, geographic, cultural and dietary patterns. Hence a similar trend may not be experienced among young Indian subjects. 46 young cases (age 16 – 35 years) of hypertension were recruited along with age, sex and BMI matched controls. Patients with body mass index (BMI) >25 kg/m2, diabetes mellitus and secondary causes of hypertension were ruled out. All patients underwent carotid ultrasonography for assessment of cIMT. Mean age and BMI of cases was 25.4 years and 20.89 kg...
Relationship Between Awareness of HIV/AIDS and Attitudes of Secondary School Students to Premarital HIV Counseling and Testing in Zaria, Northern Nigeria
Abstract:
In Nigeria HIV infection is transmitted mainly through heterosexual route, affecting mostly individuals within reproductive age groups. As a result, HIV/AIDS education is advocated as a strong component of family and reproductive health education in the school curriculum which should emphasize responsible sexual behavior, premarital chastity and protective sexual practice. To evaluate student’s knowledge of HIV/AIDS, premarital HCT, and reactions to possible discordant HCT results. Cross sectional questionnaire-based study of 600 students in 6 schools in Zaria/Sabon Gari LGAs. Exclusion criteria: students aged ≤13 years, married, in JSS 1-3, SS1.
Rhabdomyolysis in a HIV-infected Patient Following the Addition of Raltegravir, A Case Report with Review of the Literature
Abstract:
Antiretrovirals have traditionally been associated with much toxicity. Newer antiretrovirals are considered much less toxic relative to older antiretrovirals. Upon its FDA-approval in 2009, raltegravir’s adverse drug reaction profile was found to be similar to placebo. However, recently there have been reports of increased creatine kinase and rhabdomyolysis following the initiation of raltegravir. We describe a 52-year-old, African-American man who developed rhabdomyolysis after starting raltegravir for HIV. Rhabdomyolysis resolved upon discontinuation of raltegravir. Use of the Naranjo adverse drug reaction probability scale indicated a probable relationship (score of 6). Although raltegravir is a well-tolerated antiretroviral, clinicians should be aware of the possibility of rhabdomyolysis when prescribing this medication.
Cardiac Mechanics in Patients with Systemic Hypertension with Normal EF: A Speckle - Strain Imaging Study
Abstract:
Conventional transthoracic echocardiography (TTE) and tissue Doppler imaging (TDI) are usually unable to reveal very early subtle abnormalities in left ventricular (LV) systolic function caused by hypertension, prior to manifestation of hypertrophy (LVH). This study was undertaken to assess whether speckle tracking echocardiography (STE) provides more insight into early hypertension induced LV systolic dysfunction, with the purpose of identifying patients at higher risk for heart failure (HF). Fifty patients (54.16 ± 8.4 years) and 50 controls (52.17 ± 8.6 years) were enrolled. According to the presence or absence of LVH, patients were classified as LVH(+) and LVH(–), respectively. Global longitudinal function was calculated by TDI, global strains (longitudinal (LS), radial (RS), and circu...
Update and Expansion of the HIV/AIDS Prevention Program Archive (HAPPA)
Abstract:
Established in 1996 with funding from CDC and NIH, the HIV/AIDS Prevention Program Archive (HAPPA) is now the biggest private sector collection of HIV-related evidence-based behavioral interventions (EBIs). Each EBI in HAPPA has been determined by a distinguished Scientist Expert Panel to have demonstrated efficacy in preventing HIV or its risk-related behaviors in the United States. The multimedia replications kits contain everything that a new site would need to implement an EBI such as a user guide that gives an overview of the program and the evidence of its effectiveness; a facilitator’s manual that gives step-by-step implementation protocols for each session; and session implementation materials referenced in the facilitator's manual such as slides, video clips, participant handouts, activity masters, checklists, and homework assignments for the next session. The program packages also contain evaluation materials such as surveys and questionnaires that we...
Bioinformatic Resources for Diabetic Nephropathy
Abstract:
The number of individuals with diabetes is increasing worldwide and a large subset of those affected will develop diabetic nephropathy. Diabetic nephropathy is the leading cause of end-stage renal disease, has serious health consequences for affected individuals, and represents a major monetary cost to healthcare providers. Technological and analytical developments have enabled large-scale, collaborative studies that are revealing risk factors associated with diabetic nephropathy. However, much of the inherited predisposition and biological mechanisms underpinning risk of this disease remain to be identified. Meta-analyses and integrated pathway studies are becoming an increasingly important part of research for diabetic nephropathy including, genetic, epigenetic, transcriptomic, proteomic research, clinical observations and the development of animal models. This report highlights current bioinformatic resources and standards of rep...
Kynurenines and Vitamin B6: Link Between Diabetes and Depression.
Abstract:
The increased association between depression and diabetes mellitus is generally acknowledged. Recent studies suggest that depression leads to diabetes.However, the underlying molecular mechanisms for this association remain unclear.Literature and our data indicate that inflammatory and/or stress factors in depression up-regulate tryptophan (TRP) conversion into kynurenine (KYN), a substrate for nicotinamide adenine dinucleotide (NAD) biosynthesis. Deficiency of vitamin B6, a co-factor of the key enzymes of KYN – NAD pathway, shunts KYN metabolism from formation of NAD towards production of xanthurenic (XA) and kynurenic (KYNA) acids. Human and experimental studies reveal that XA, KYNA and their metabolites interfere with production, release and biological activity of insulin. We propose that inflammation- and/or stress-induced up-regulation of TRP – KYN metabolism in combination with vitamin B6 deficiency is one of the mechanisms mediating increased risk of di...
Determination of the Proteomic Response to Lapatinib Treatment using a Comprehensive and Reproducible Ion-Current-Based Proteomics Strategy
Abstract:
Lapatinib, a small molecule tyrosine kinase inhibitor is currently used in the treatment of HER2-positive breast cancer. The aim of this study was to further understanding of lapatinib response for the development of novel treatment lapatinib-focussed treatment strategies. HER2-overexpressing SKBR3 breast cancer cells were treated with lapatinib for 12 hours and the resultant proteome analyzed by a comprehensive ion-current-based LC-MS strategy. Among the 1224 unique protein identified from SKBR3 cell lysates, 67 showed a significant change in protein abundance in response to lapatinib. Of these, CENPE a centromeric protein with increased abundance, was chosen for further validation. Knockdown and inhibition of CENPE demonstrated that CENPE enhances SKBR3 cell survival in the presence of lapatinib. Based on this study, CENPE inhibitors may warrant further investigation for use in combination with lapatinib.
Testing Maternal-Fetal Genotype Incompatibility with Mother-Offspring Pair Data
Abstract:
Maternal-fetal genotype (MFG) incompatibility has been shown to be strongly associated with a number of genetic diseases. Most current methods for the MFG test rely on parents-offspring trio genotype data and do not apply to mother-offspring pair data where paternal genotype is unavailable. In this paper, we developed a two-stage method for testing the allelic effect of given SNP through subgroup analysis of compatible MFG pairs and further tested the MFG incompatibility effect according to different scenarios determined by the allelic effect. Simulation studies demonstrated that this novel two-stage model is powerful in detecting the MFG incompatibility effect. This method can be implemented through publicly available statistical software, such as SAS, R, etc. We demonstrate with a case-control study of small for gestational age neonates that the method identified a SNP in the IGF2R gene with a significant allelic effect (p = 0.037), and a SNP in the IGF1 gene wi...
Quantitative Proteomics Using 15N SILAC Mouse
Abstract:
In biomedical research the use of mammalian tissues is crucial to increase our understanding of complex human diseases. Mass spectrometry-based proteomic approach has become the most powerful tool of studying large-scale protein expression profiles in mammalian tissues. To perform global proteome analysis quantification of mammalian tissues, we generated 15N SILAC mice to obtain tissue-matched labeled peptide libraries for mass spectrometry-based quantitative proteomic analysis. We developed a new labeling protocol to circumvent adverse effects of introducing 15N labeled diet to mice, and showed that the new labeling scheme has no significant effect on the fertility and reproduction of C57/BL6 mice. Using labeled tissues from these mice, we compared the reproducibility of mass spectrometry-based quantification with or without 15N labeled internal standards among biological replicates of young and old brains. We found that labeled-...