Publications by authors named "Tony Yang"

The elderly population in the United States will expand drastically over the next few decades; indeed, the number of persons aged 65 or older is expected to swell to approximately 19 percent of the nation's population by 2030--a staggering statistic in light of the fact that the present population of elderly people constitutes fewer than 13 percent. Largely because of this fact, long-term care for this population is becoming increasingly important. Traditionally, elderly persons who lost the ability to fully care for themselves would enter a healthcare facility known as a nursing home.

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The present study compared executive dysfunction among children with attention-deficit/hyperactivity disorder (ADHD) after traumatic brain injury (TBI), also called secondary ADHD (S-ADHD), pre-injury ADHD and children with TBI only (i.e., no ADHD).

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Background: Functional magnetic resonance imaging research suggests that major depressive disorder (MDD) in both adults and adolescents is marked by aberrant connectivity of the default mode network (DMN) during resting state. However, emotional dysregulation is also a key feature of MDD. No studies to date have examined emotion-related DMN pathology in adolescent depression.

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Background: The diagnosis of major depressive disorder (MDD), according to the , is based only on adult symptomatology of depression and not adapted for age and gender. This may contribute to the low diagnostic specificity and validity of adolescent MDD. In this study, we investigated whether latent classes based on symptoms associated with depressed mood could be identified in a sample of adolescents seeking psychiatric care, regardless of traditionally defined diagnostic categories.

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Few studies have explored durability of insulin pump use, and none have explored the link between depression and pump discontinuation. To examine the relationship between depressive symptoms [measured by the Children's Depression Inventory (CDI)], method of insulin delivery, and hemoglobin A1c (A1c), mixed models were used with data from 150 adolescents with type 1 diabetes (T1D) and visits every 6 months for 2 years. Of the 63% who used a pump, compared with multiple daily injections (MDI) at baseline, there were higher proportions who were non-minorities, had caregivers with a college degree, private insurance, and two caregivers in the home (p ≤ 0.

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Several psychiatric disorders, including major depressive disorder (MDD), are associated with increased blood markers of oxidative stress. The relevance of this to the oxidation-sensitive hippocampus (HC) is unknown. We investigated the relationship between peripheral oxidative stress markers and HC volume in unmedicated individuals with MDD (n=16) and healthy controls (n=19).

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Major depressive disorder (MDD) is one of the current leading causes of disability worldwide. Adolescence is a vulnerable period for the onset of depression, with MDD affecting 8-20% of all youth. Traditional treatment methods have not been sufficiently effective to slow the increasing prevalence of adolescent depression.

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Objective: Despite the significant prevalence of adolescent depression, little is known about the neuroanatomical basis of this disorder. Functional dysregulation in frontolimbic circuitry has been suggested as a key neural correlate of adult and adolescent depression impeding emotional regulation. However, less is known about whether this dysregulation is overlaid on impaired white matter microstructure.

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Centrioles are 9-fold symmetric structures duplicating once per cell cycle. Duplication involves self-oligomerization of the centriolar protein SAS-6, but how the 9-fold symmetry is invariantly established remains unclear. Here, we found that SAS-6 assembly can be shaped by preexisting (or mother) centrioles.

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Significant public health challenges facing the United States stem from preventable disease. The Patient Protection and Affordable Care Act dedicated substantial resources toward prevention. Among other reforms, the Affordable Care Act requires Medicaid and private health insurers to cover clinical preventive services for adults, pursuant to recommendations by the U.

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Social media marketing is the next frontier for direct-to-consumer advertising of pharmaceutical products, but represents an unchartered territory for regulatory action. With explosive growth in the use of social media, along with pharmaceutical companies' increasing adeptness at taking advantage of opportunities for social media marketing, the Food and Drug Administration (FDA) faces an urgent need to develop its own capacities to monitor and engage with social media marketing. In response to potential FDA action, pharmaceutical companies' marketing, regulatory compliance and legal staffs must work closely to design initiatives that are sensitive to FDA concerns.

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Nurse practitioners can ease increased pressure on primary care shortage while providing a cost-effective and high-quality alternative to certain physician services. However, scope-of-practice laws are restrictive and their modification remains a source of controversy. Clearly, there is a need for new thinking around the scope of practice debate.

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Mobile health (mHealth) technology has facilitated the transition of care beyond the traditional hospital setting to the homes of patients. Yet few studies have evaluated the legal implications of the expansion of mHealth applications, or "apps." Such apps are affected by a patchwork of policies related to medical licensure, privacy and security protection, and malpractice liability.

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Objectives: We assessed how nonmedical exemption (NME) laws and annual uptake of vaccines required for school or daycare entry affect annual incidence rates for 5 vaccine-targeted diseases: pertussis, measles, mumps, Haemophilus influenzae type B, and hepatitis B.

Methods: We employed longitudinal mixed-effects models to examine 2001-2008 vaccine-targeted disease data obtained from the National Notifiable Disease Surveillance System. Key explanatory variables were state-level vaccine-specific uptake rates from the National Immunization Survey and a state NME law restrictiveness level.

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Background: The subgenual anterior cingulate cortex (sgACC) and its connected circuitry have been heavily implicated in emotional functioning in adolescent-onset major depressive disorder (MDD). While several recent studies have examined sgACC functional connectivity (FC) in depressed youth at rest, no studies to date have investigated sgACC FC in adolescent depression during negative emotional processing.

Methods: Nineteen medication-naïve adolescents with MDD and 19 matched healthy controls (HCL) performed an implicit fear facial affect recognition task during functional magnetic resonance imaging (fMRI).

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The objective of this study was to understand how novel psychiatric disorders (NPD) in children with mild traumatic brain injury (MTBI) are related to pre-injury variables, injury-related variables, and concurrent neurocognitive outcome. A group of 79 children, ages 5 to 14 years, who had experienced MTBI, were studied from consecutive hospital admissions with semistructured psychiatric interviews soon after injury (baseline); 60 children were reassessed 12 months post-injury. Standardized instruments were used to assess injury severity; lesion characteristics; pre-injury variables, including psychiatric disorder, family psychiatric history, family functioning, socioeconomic status, psychosocial adversity, adaptive functioning, and post-injury neurocognitive and adaptive functioning.

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Background: A positive family history (FHP) of alcohol use disorders (AUD) is linked to increased risk for personal AUD, but the mechanisms behind this risk are unclear. Previous research suggests that a subtle neurodevelopmental lag in FHP adolescents may contribute to risk for future AUD.

Methods: Functional magnetic resonance imaging (fMRI) response to a spatial working memory (SWM) task was examined for markers of neuromaturational delay in 85 youth with and without FHP.

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Endoplasmic reticulum (ER)-plasma membrane (PM) junctions are highly conserved subcellular structures. Despite their importance in Ca(2+) signaling and lipid trafficking, the molecular mechanisms underlying the regulation and functions of ER-PM junctions remain unclear. By developing a genetically encoded marker that selectively monitors ER-PM junctions, we found that the connection between ER and PM was dynamically regulated by Ca(2+) signaling.

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Objective: Although substantial literature has reported regional cerebral blood flow (rCBF) abnormalities in adults with depression, these studies commonly necessitated the injection of radioisotopes into subjects. The recent development of arterial spin labeling (ASL), however, allows noninvasive measurements of rCBF. Currently, no published ASL studies have examined cerebral perfusion in adolescents with depression.

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Objective: The neurobiological underpinnings of anorexia nervosa (AN) are poorly understood. In this study, we tested whether brain gray matter (GM) and white matter (WM) in adolescents with AN would show alterations comparable to those in adults.

Method: We used magnetic resonance imaging to study GM and WM volume, and diffusion tensor imaging to assess fractional anisotropy for WM integrity in 19 adolescents with AN and 22 controls.

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Individuals with anorexia nervosa (AN) restrict food consumption and become severely emaciated. Eating food, even thinking of eating food, is often associated with heightened anxiety. However, food cue anticipation in AN is poorly understood.

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Background: Very few studies have been performed to understand the underlying neural substrates of adolescent major depressive disorder (MDD). Studies in depressed adults have demonstrated that the subgenual anterior cingulate cortex (sgACC) plays a pivotal role in depression and have revealed aberrant patterns of resting-state functional connectivity (RSFC). Here, we examine the RSFC of the sgACC in medication-naïve first-episode adolescents with MDD.

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Rationale: Response inhibition abnormalities contribute to several maladaptive behaviors commonly observed during adolescence, including heavy drinking.

Objectives: The present study aimed to determine whether abnormalities in brain response during response inhibition predate or follow adolescents' transition into heavy drinking, which is pivotal in identifying the neural antecedents and consequences of adolescent alcohol use.

Methods: Longitudinal functional magnetic resonance imaging (fMRI) acquired during a response inhibition task was collected on adolescents before the onset of heavy drinking and then again on the same scanner approximately 3 years later.

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