BIO833: Research Project B XXXXXXXXXX Project Title: Investigation of genetic and environmental risk factors for co-morbid depression and anxiety disorders. Supervisor(s): Margaret McLafferty & Elaine...

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Answered Same DayJul 22, 2022

Answer To: BIO833: Research Project B XXXXXXXXXX Project Title: Investigation of genetic and environmental risk...

Dr Shweta answered on Jul 23 2022
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BIO833: Research Project                                      B00673048
Project Title:
Investigation of genetic and environmental risk factors for co-morbid depression and anxiety disorders.
Supervisor(s):     Margaret McLafferty & Elaine Murray
Project Location: Remote Working
Is ethi
cs approval in place: Yes
Background (8 marks):
Co-morbid depression and anxiety disorders are the commonly prevalent disorders worldwide [1]. These disorders are interrelated as 85% of depression patients has significant symptoms of anxiety and likewise 90% of anxiety patients have the issue of comorbid depression [2]. The main symptoms associated with these disorders are repeated negative thoughts, loss of interest in activities, feelings of worthlessness, apprehension, sense of helplessness, confusion, persistent sadness, muscle tension, palpitations etc. [3,4]. There are several genetic and environmental risk factors associated with the co-morbid depression and anxiety disorders like trauma, poor nutrition, grief, family history and genetics, chronic stress, gender, medications effect, personality traits [5,6,7]. Kwong et al 2019 [8] reported in their cohort study that the major environmental risk factors associated with the co-morbid depression and anxiety disorders are related to the late childhood and young adulthood stages and these are sex, polygenic risk score, maternal postnatal depression, partner cruelty to child’s mother and child being bullied. Cerda et al 2010 [9] reported in their review article about the genetic and environmental determinants of most prevalent psychiatric comorbidities the general anxiety disorders, depression, abuse and conduct disorder. They mention that the alteration in potential genes 5HTTLPR, MAOA, and DRD1-DRD4 of the central nervous system is responsible for these psychiatric comorbidities. And the main environmental risk factors are pivotal social factors like childhood adversity, adverse life events, family issues, socioeconomic and academic difficulties. Similarly, Mondragon et al in 2022 [10] analysed in their network analysis study the influence of polygenic factors and environmental risk factors on depression and psychosis disorders and mentioned that these disorders are comorbid and have overlapping genetic and environmental risk factors like area-level exposures, deprivation, trauma, air pollution and greenspace. Sugimoto et al 2015 [11] reported in their review about the genetics of anxiety disorders and mentioned that its genetic epidemiology includes family and twin studies and the major source of this familial risk is mainly genetic in origin like global DNA methylation etc with heritability of approximately 30–50%....
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