Relationship of amyloid beta and neurofibrillary tau deposition in Neurodegeneration in Aging Down Syndrome (NiAD) study at baseline

IMPORTANCE

Adults with Down syndrome (DS) are at high-risk of revealing Alzheimer's disease (AD) pathology, in part due to the triplication of chromosome 21 encoding the amyloid precursor protein. Adults with DS are uniformly affected by AD pathology by their 30's and have a 70% to 80% chance of clinical dementia by their 60's. Our previous studies have assessed longitudinal changes in amyloid beta (Aβ) accumulation in DS.

OBJECTIVE

The goal of the present study was to assess the presence of brain tau using [18F]AV-1451 positron emission tomography (PET) in DS and to assess the relationship of brain tau pathology to Aβ using Pittsburgh Compound B (PiB)-PET.

DESIGN

Cohort study.

SETTING

Multi-center study.

PARTICIPANTS

Participants consisted of a sample of individuals with DS and sibling controls recruited from the community; exclusion criteria included contraindications for magnetic resonance imaging (MRI) and/or a medical or psychiatric condition that impaired cognitive functioning.

EXPOSURES

PET brain scans to assess Aβ ([11C]PiB) and tau ([18F]AV-1451) burden.

MAIN OUTCOMES AND MEASURES

Multiple linear regression models (adjusted for chronological age, sex and performance site) were used to examine associations between regional [18F]AV-1451 standard uptake value ratio (SUVR) (based on regions associated with Braak stages 1-6) and global [11C]PiB SUVR (as both a continuous and dichotomous variable).

RESULTS

A cohort of 156 participants (mean age = 39.05, SD(8.4)) were examined. These results revealed a significant relationship between in vivo Aβ and tau pathology in DS. As a dichotomous variable, [18F]AV-1451 retention was higher in each Braak region in PiB(+) participants. We also found, based on our statistical models, starting with the Braak 3 region of interest (ROI), an acceleration of [18F]AV-1451 SUVR deposition with [11C]PiB SUVR increases.

Integrating Biomarker Outcomes into Clinical Trials for Alzheimer's Disease in Down Syndrome

The NIH-funded Alzheimer's Biomarker Consortium Down Syndrome (ABC-DS) and the European Horizon 21 Consortium are collecting critical new information on the natural history of Alzheimer's Disease (AD) biomarkers in adults with Down syndrome (DS), a population genetically predisposed to developing AD. These studies are also providing key insights into which biomarkers best represent clinically meaningful outcomes that are most feasible in clinical trials. This paper considers how these data can be integrated in clinical trials for individuals with DS. The Alzheimer's Clinical Trial Consortium - Down syndrome (ACTC-DS) is a platform that brings expert researchers from both networks together to conduct clinical trials for AD in DS across international sites while building on their expertise and experience.

Self-care Practices of Type 2 Diabetes Patients by Socio-demographic and Clinical Factors: An Ordered Probit Model

Abstract

A narrative review of the literature on the reproductive health of female sex workers having age below twenty years

Objective: Female sex workers (FSWs) under 20 years of age range from 1,000 to 575,000 in different cities and countries across the globe. There is only a handful of information on the reproductive health (RH) issues of these younger FSWs in the perspective of service utilization and healthcare system. We reviewed existing literature with a view to describe the reproductive health problems, service utilization, and service availability as well as information sources among the FSWs ages <20 years. Materials and methods: A web-based search using Google, Google Scholar, MEDLINE/ PubMed/ PubMed Central, HINARI and JSTOR was performed in English Language. The prevalence of a health issue and percentage of service utilization had been shown using ranges of minimum and maximum value which were calculated by different studies. Results: Findings identified the following RH problems: unintended pregnancies (52% - 95%), induced abortion (51% - 53%), repeated or multiple abortions (13% - 43%), childbirth experiences, sexually transmitted infections (74%-84%), HIV (1% - 60.6%), violence (beaten, robbed, not paid, forced or coerced sex, rape) and mental disorders (depression, suicidal thoughts). The consistent use of condom (26%-55%) was not satisfactory. Overall 64% of under 20 years FSWs reported little or no access to healthcare in the previous year and access to RH information sources was also poor. Conclusion: This review has potentially meant to bring forward the RH issues of younger FSWs to the policy makers and programme planners to implement targeted reproductive health interventions for the FSWs ages <20 years. Bangladesh Journal of Medical Science Vol.19(1) 2020 p.17-31

Pathways to care for patients in Pakistan experiencing signs or symptoms of breast cancer

Multiple social and financial barriers exist to breast cancer detection in Pakistan, which may cause a delay in seeking care and the final diagnosis. This analytical study documents the pathways and time courses associated with referral to diagnostic centres to evaluate the clinical signs and symptoms of breast cancer. This report also verifies the association between socio-demographic and clinical indicators concerning the length of time spent before reaching diagnostic facilities. A purposive sample of 200 patients was selected from two tertiary care hospitals in Lahore, Pakistan, for the interviews. Descriptive statistics (that is, percentages, frequencies, and measures of central tendencies) and a multiple linear regression model were used to achieve the study objectives. The descriptive model showed 31-128 days interval between a patient's awareness of a clinical sign or symptom and receiving care. The healthcare system, including traditional healers, took from 7 to 194 days, and the time to diagnosis ranged from 15 to 30 days. Pain severity, larger tumour size, lack of clinical improvement, and the desire to obtain better treatment were reasons given for seeking care, but lack of awareness and fear of financial burden related to accessing healthcare facilities were identified as barriers. Moreover, socio-demographic and other predictive clinical factors were potentially associated with and substantially influenced the likelihood of the increased length of breast cancer patients' time to reach diagnostic centres. In conclusion, referrals by multiple healthcare providers, especially traditional healers and general practitioners, was a significant predictor for delay in diagnosis. Therefore, increased awareness and a responsive healthcare system may reduce the time from the recognition of symptoms to the early detection of breast cancer among women, thus improving outcomes in a developing country.

Study on Endoscopic Retrograde Cholangiopancreatography

Endoscopic retrograde cholangiopancreatography (ERCP) is a modern & universally established modality in the evaluation and treatment of suspected biliary and pancreatic disease. In Bangladesh, ERCP services are limited to few tertiary care centers mostly in the capital & large city. ERCP was 1st introduced in Mymensingh on 3rd April 2016 in a private hospital. Since then, Mymensingh Medical College Hospital (MMCH) provides ERCP services to a large volume of patients in collaboration with private center for diagnostic accuracy & therapeutic purpose. The aim of this study was to evaluate our experience in ERCP, to characterize & evaluate the aetiology, findings of ERCP & frequency of complications. This prospective type of study was carried out by the department of hepatology, MMCH from 3rd April 2016 to 10th July 2018 in collaboration with that private center where ERCP has been established. All patients undergoing ERCP during this period were included. Aetiology & findings were assessed at the time of ERCP & complications were assessed during procedure, index hospitalization & within 30 days after the procedure by telephone contact. A total of 301 consecutive ERCP were performed during the study period. Among them, 182(60.5%) were male & 119(39.5%) were female with an age range of 18-78 years. The most common indications for ERCP were: cholangiocarcinoma in 98(32.56%) & choledocholithiasis in 95(31.56%) followed by periampullary growth in 93(30.89%), suspected CBD stricture in 12(4%) & chronic pancreatitis in 2(0.66%). The most common findings were choledocholithiasis (32.56%), cholangiocarcinoma (32.56%), biliary obstruction due to periampullary growth (30.56%). Biliary fistula with distal bile duct stricture was found in (1.66%), bile duct stricture in (1.33%), chronic pancreatitis in (0.66%), and organic papillary stenosis with deformed bulb were discovered in (0.34%) case. All ERCPs were done for therapeutic purpose. Endoscopic sphincterotomy was the most common therapeutic procedure (87.04%) of which biliary stenting was done in (67.44%) & stone extraction in (33.71%). Stone extraction from biliary tree was successfully done in 94 cases (98.67%) but it was unsuccessful from biliary tree in 4 cases (1.33%) & also from pancreatic duct in a separate case. The most frequent complication was Post-ERCP pancreatitis in 9 patients (2.99%) followed by acute confusional state (1.33%). Post-ERCP cholangitis occurred in (0.99%) & death was reported in 2 cases (0.66%) due to anaesthetic hazard.

Knowledge and Practice of Hepatitis B among Biological and Biomedical Sciences Students in a Public University of Bangladesh

A large numbers of biological and biomedical sciences students intricate themselves in health care professions, which makes them vulnerable to occupational exposure of Hepatitis B. This study aimed to determine the level of knowledge and practice of hepatitis B among biological and biomedical sciences students in a public university of Bangladesh. A cross-sectional study was conducted in Noakhali Science and Technology University (NSTU), Noakhali, Bangladesh from March 2017 to July 2017. Data was collected from students through purposive sampling technique using self-administered structured questionnaire and analyzed by using IBM SPSS 23.0. Out of the 303 participants, 213(70.3%) were within adequate knowledge range and 30(9.9%) of the students were in good practice range. Only 71(23.14%) of the students were fully vaccinated against Hepatitis B. Knowledge level of Participant's were significantly associated with their age and father's education. The practice level was significantly associated with age and all educational variables. Moreover, significant positive but weak linear correlations between knowledge and practice score were identified. The study indicates adequate knowledge, but poor practice of students towards HB. Thus, we recommend all students to implement their knowledge in real life and should be vaccinated prior to entry into health profession.