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Case study for angelman syndrome
Pseudo-angelman syndrome
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Angelman Syndrome is a rare genetic disorder characterized by neurological and developmental issues. Dr. Harry Angelman discovered the syndrome in 1965. It was formerly called “Happy Puppet Syndrome” due to the clinical features possessed by those affected. Dr. Angelman observed those affected as appearing normal upon birth but eventually showing signs of development disabilities. Angelman Syndrome mainly targets the nervous system and can be detected in infants as early as six months. Typically, the first noticeable sign is usually feeding problems or a delay in development. It is caused by a deletion or mutation, such as translocation, in Chromosome 15, long arm q, band 12. Some references note the affected region as bands 11.2-13. This area …show more content…
Also a distinct feature in those affected is a happy and excitable demeanor coupled with frequent smiling and/or outbursts of laughs. Other major clinical features include: severe developmental delays or intellectual disability (mental retardation), ataxia or loss of control of bodily movements which leads to balance disorder, sudden jerky movements or trembling of extremities, severe speech impairment, seizures or epilepsy, and hypopigmentation, which is the lightening of skin or hair color. Other complications associated with Angelman syndrome are sleep disorders, hyperactivity, scoliosis, and obesity. Infants with Angelman Syndrome have problems sucking and swallowing. Younger children experience increased motor activity, which may include moving from one activity to another in short amount of time or generally short attention span. Hyperactivity often subsides with age, and medication usually isn't necessary. Sleep disorders such as abnormal wake patterns or lack of sleep are very common among those with Angelman Syndrome. Drug or behavior therapy may help, but it may also lessen with age. Older children tend to be prone to obesity due to increased appetite. Scoliosis or curvature of the spine is not as common but may still occur in those
I chose not to use any of the prompts provided, but instead connect the article to what I learned in my sociology class lass quarter. In class we watched part one of film series of Unnatural causes, titled Unnatural Causes: Is Inequality Making us Sick "In Sickness and in Wealth". While reading the article this reminded me about the cases studied in the film to see whether wealth inequality contributes to making people sick. In the film they focused on the social determinants of health, wealth and education. In both the article and part one of the film Unnatural Causes they focused on three different individuals and how their health are affected by they choices they make and the access they have to care.
Twin studies have been used to distinguish between genetic and environmental factors for many disorders in the general population including ectodermal dysplasia, Ellis-van Creveld, and anencephaly. This review focuses on genetic disorders affecting monozygotic, dizygotic, and conjoined twins to gain a better understanding of them. Many studies focus on twins because they have a nearly identical genome, which eliminates environmental factors. In case studies, the concordance rates in monozygotic twins have supported that certain disorders were caused by genetics and not the environment. The discordant values in twins will also be evaluated briefly. Twinning studies have also shown linkages between specific disorders and the genes responsible for them. Knowing the location of these genes allows patients to be treated quickly and efficiently. This paper will discuss the possible causes of twinning and the various methods of identifying abnormalities in twins. These methods also allow preventive measures against the rise of birth defects during prenatal development. Epigenetics in twins is also viewed through the perspective of effects on them. Treatments for genetic disorders in twins are reviewed, ranging from the restoration of malformed teeth to the separation of conjoined twins. Support groups for twins in treatment, and their families are also briefly reviewed.
First and foremost, Eisenmenger syndrome was initially described in 1897 when German physician, Victor Eisenmenger, reported on a patient with symptoms of dyspnea and cyanosis from infancy that subsequently developed heart failure (Connolly, 2014). The postmortem description was revealed and a ventricular septal defect was discovered (El-Chami et al., 2014a). With that being said, this had been the first time that the link between a large congenital cardiac shunt defect and the development of pulmonary hypertension had ever been noted (El-Chami et al., 2014b). The normal heart has four chambers. The two upper chambers are separated from each other by the atrial septum (NORD, 2014a). The two lower chambers are known as ventricles and are separated from each other by the ventricular septum (NORD, 2014b).
(Calendar 2013) Waardenburg Syndrome is a rare genetic disorder meaning that is caused by a mutation of genes. The disorder is classified as type I, II, III, or IV based on inheritance pattern and symptoms (Genetics 2013). Waardenburg Syndrome is an incurable disorder that is inherited from either one or both parents. If it came from one parent, it is an autosomal dominant pattern and if it came from both, it is known as an autosomal recessive pattern (Calendar 2013).
Duane Syndrome is an inherited unusual type of strabismus (squint) most often described by the incapability of the eye(s) to move inwards, outwards individually or together. This was first reported via ophthalmologists Jakob Stilling in 1887 and also Siegmund Türk in 1896. The syndrome was named after Alexander Duane, who explained the disorder more specifically in 1905. The syndrome is described as a miswiring of the eye muscles, causing eye muscles to tighten when they don’t need to and other eye muscles not to tighten when they need to. Very often patients get the syndrome by the age of 10 and it is more common in females (60% of the cases) than males (40% of the cases). Although the eye is usually the abnormality associated with Duane Syndrome, there are other bodily functions that can be affected. Duane syndrome cannot be cured, because the cranial nerve is missing and it cannot be replaced. The gene known as “SALL4” has been associated as a cause of this condition.
...ular level, Alpha-1 has become one of the best-understood genetic disorders. While many questions about the clinical disorder still remain a mystery. The Alpha-1 Foundation, The National Institutes of Health, liver disease experts and pulmonary experts are hard working to establish patient management, as well as clinical treatment guidelines for patients. With this and the new stem cell discoveries it leaves me with hope that a cure is just around the corner.
Both of these methods can help determine and eliminate genetic disorders, as certain conditions can be screened out using these technologies. As discussed in Meseguer et al., more than 300 diseases have been related to sexual chromosomes till date. Case studies also argue the important role of these methods in family balancing for varied family dynamics who aim to compensate their family with a representation of the other sex (Meseguer et al., 2002). Critics have also mentioned that with an increase in demand, these methods could become more economical and widely available, including to couples who may need it due to medical
Marfan syndrome is an inherited disorder that affects the connective tissue of the body (“What is Marfan Syndrome?” n.d.). The connective tissue plays a vital role in supported the tendons, heart valves, cartilage, blood vessels, and more parts of the body (“Connective Tissue,” n.d.). “What is Marfan Syndrome?” (n.d.) explains that the condition has no cure, and those who have it lack strength in their connective tissue, affecting their bone, eyes, skin, nervous system, and lungs. Furthermore, Marfan syndrome is common, and it is imperative to understand how the body is affected by it, the symptoms, and the treatment of this condition.
This chapter will begin with a short explanation of what Muscular Dystrophy is and a general information paragraph over each type of the major muscular dystrophies today.
Angelman Syndrome is a neuro-genetic disorder, brought upon the body through the mutilation or deletion of the maternal 15th chromosome. The prevalence of this disorder is still constantly debated because of the common symptoms it shares with other disorders, making it difficult to recognize and differentiate. More specific studies of behavior are needed to increase the range of knowledge on such a complex disorder. In 2007 Dr. Weeber relieved a mouse model of many symptoms of Angelman Syndrome. Studies of this disease are crucial for finding the cure. Even though this is a difficult challenge, there are signs of hope to cure this disease for humans.
In sum, Angelman syndrome is a rarity, and researchers are working very diligently to gain more information on how it works, treatment options, and also an eventual cure. Until then, children and adults will continue to live on receiving treatments and therapies in order to deal with the symptoms.
There is no known single cause of autism. Researchers are investigating a number of possible theories including genetics, heredity, medical problems, problems during pregnancy or delivery, as well as environmental influences. It is widely accepted that it is caused by abnormalities in the brain structure or function. There is evidence from neuropathological studies that autism has its origins in abnormal brain development early in prenatal life which continues postnatally, showing acceleration in brain growth measured by head circumference (Zwaigenbaum, L., Bryson, S., Rogers, T., Roberts, W., Brian, J., & Szatmari, P., 2005). The disorder also seems to have a genetic basis, although researchers have yet to find the specific genes that link to the onset of autism. There could be a cluster of genes that have somehow interfered with normal brain development and function. Studies show that twins of children with autism were more likely to be autistic themselves than the regular population, demonstrating there is a heredity lin...
Autism is directly linked to five chromosomes. The five that are linked to it are chromosome 2, chromosome 3, chromosome 7, chromosome 15 and chromosome X. chromosome is defined as an organized package of DNA found in the nucleus of the cell. different organisms have different numbers of chromosomes. humans have twenty-three pairs of chromosomes. twenty-two of them are numbers chromosomes which are called autosomes, and one pair of sex chromosomes which are x and Y.
Epigenetics is the study of both heritable and non-heritable changes in gene translation, which do not stem from mutation. Epigenetic alterations to DNA may occur in several different ways; histone modification, DNA methylations, expression of microRNAs, and changes of the chromatin structure (Ntanasis-Stathopoulos et al). Depending on their presentation, they may be passed on to offspring. The exact mechanism of heritable epigenetic modification has not been discovered, but all of these alterations may have some impact on a wide range of disorders and have far reaching implications in the medical field. The study of epigenetics seeks to answer the age old question of whether nature or nurture is responsible for our phenotype, and it has arrived at the answer that in fact, both are. The discovery of epigenetic changes may lead us to cure many disorders, and even personality problems.
There is a substantial amount of evidence that also points to a genetic origin of autism. Studies with monozygotic twins suggest that autism, or at least an autistic-like disorder, is inherited. There is also strong evidence of the Fragile X Syndrome as being extremely associated with infantile autism. Also, a nearly four to one ratio of autistic boys to girls points to a sex-linked inheritance. It is the convention that genetic predisposition at least, is evident in many cases. Siblings are 50 to 100 times as likely to illustrate autistic symptoms than non-sibling relatives. The search for the genetic marker, or markers, as the case may be, is fast and furious at present. Many avenues are being pursued in many different directions. Perhaps history will repeat itself and someone will stumble across the answer to this puzzling disease.