Review Article
Diabetogenic Factors that Contributes to Diabetes Mellitus in Pakistan
Muhammad Asif*, Muhammad Bilal Bin Khalid, Tehreem Munir and Samreen Riaz
Corresponding Author: Muhammad Asif, Institute of Microbiology and Molecular Genetics, University of the Punjab, Lahore, Pakistan.
Received: August 11, 2022; Revised: August 27, 2022; Accepted: September 10, 2022 Available Online: October 17, 2022
Citation: Asif M, Khalid MBB, Munir T & Riaz S. (2023) Diabetogenic Factors that Contributes to Diabetes Mellitus in Pakistan. Int J Diabetes, 5(1): 164-172.
Copyrights: ©2023 Asif M, Khalid MBB, Munir T & Riaz S. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Diabetes mellitus (DM) is a worldwide growing health and chronic disorder in which our body doesn’t produces insulin or unable to utilize insulin it produced which result in high blood sugar (glucose) level. The scientific root causes of diabetes mellitus is lack of insulin production, insulin resistance or hyperglucagonemia (excess glucagon secretions). Diabetes patient effect negative on both quality of life and survival with severe acute and chronic complications. The prevalence of diabetes mellitus has increase exponentially in the under-developing countries especially in Pakistan over the past few years. The statistic show that the diabetic patient are increasing at an alarming rates and it’s very dangerous if goes on a same rate. The etiology of diabetes mellitus is associated with irreversible risk factors such as race, genetic, age, and ethnicity and reversible factors such as physical activity, healthy diet and smoking. Other than that many environmental factor that are also a causative agent for the diabetes including polluted air, water and soil, heavy metal contamination, industrialization, globalization, economic stress, prevalence of pesticides, stress, family history, exposure to viral disease. The government official and stakeholders including health-care providers, health facilities, agencies involved in diabetes care, etc. should encourage patients to understand the importance of these factors that contributes to diabetes which may help in disease management, appropriate self-care and better quality of life. The patient should take account of these environmental factors.

Keywords: Diabetes mellitus, Blood glucose level, Environmental factor, Prevalence, Pakistan

Abbreviations:
IDF: International Diabetes Federation; AFR: Africa; EUR: Europe; MENA: Middle East and North Africa; NAC: North America and Caribbean; SACA: South and Central America; SEA: South-East Asia; WP: Western Pacific
INTRODUCTION
Diabetes mellitus more simply called as diabetes and was first recognized as a disease around 3000 years ago [1-3], is a most common endocrine dysfunctions which characterized by hyper-glycaemia (high blood sugar level). It is condition in which pancreas isn’t capable to produce to insulin or our body is unable to utilize the insulin produces. Insulin is an endocrine hormone secreted by beta cell of islets of Langerhans that acts like a key to let glucose from the food we eat pass from the blood stream into the cells in the body to produce energy. The carbohydrate include in our foods are digested into glucose in the blood [3]. Insulin promotes glucose influx into the cells. Not being able to produce insulin or use it effectively leads to raised glucose levels in the blood (known as hyperglycemia) [4]. Poorly controlled diabetes can lead to other serious health issues including cardiovascular disease, nerve damage (neuropathy), kidney damage (nephropathy), eye damage (retinopathy), foot damage and skin conditions, hearing impairment, depressions and Alzheimer's disease.

There are three main types of diabetes namely, Insulin dependent diabetes mellitus (IDDM) or type 1 diabetes (T1D) in which the beta cell (β-cell) of pancreas are destroyed by autoimmune inflammatory mechanisms and unable to secrete insulin [4-7]. This type lead toward absolute insulin deficiency and the patient required to wear insulin pump or to inject insulin daily. This type of diabetes occurs most frequently in children and adolescents [3,5,6]. It’s also known as “juvenile-onset diabetes”. Type 1 account for 5-10% of total diabetes. Non-insulin dependent diabetes mellitus(NIDDM) or type 2 diabetes (T2D) is a complex metabolic disorder occurs due to insulin resistance of our body cell that unable to utilize it, it is a condition in which cell fails to use insulin properly after it been produces by pancreas [7]. This type is common in adult and 90% of all diabetes. This type was previously termed as “adult-onset diabetes”. The third type of diabetes is gestational diabetes mellitus (GDM) which usually occur in pregnancy when women without a previous history of diabetes develop high blood glucose and is associated with complications to both mother and child. GDM usually disappears after pregnancy [7-11] (Figure 1).

There are different diagnosing procedure for diabetes that are based on plasma glucose criteria, either the fasting plasma glucose (FPG) value or the 2 h plasma glucose (2 h PG) value during a 75 g oral glucose tolerance test (OGTT) or A1C criteria. The number of people with diabetes is increasing due to population growth, aging, urbanization, and increasing prevalence of obesity and physical inactivity [12-14]. Regular screening of adults is essential for early detection and care [15].

STATISTICS

Diabetes mellitus (DM) is fastest growing global health emergencies of the 21st century that affects one in every ten of human population [16-18]. The prevalence of diabetes worldwide increases yearly and about half a billion people are living with diabetes [17,19]. The top 10 countries with all types of diabetic patient in the years 2021 and 2045 are shown in Table 3. China is on top with 140 million diabetic patient in 2021 and Pakistan on third with 33 million people with diabetes. The prevalence of DM was 10.5% (536.6 million people) in 20-79 year olds in 2021, rising to 12.2% (783.2 million) in 2045 [18,19]. Diabetes prevalence was similar in both genders equally and highest in old aged person. According to reports of IDF in 2021 the prevalence of DM was estimated 12.1% in urban and 8.3%in rural areas, whereas 11.1% in well-developed countries as compared to 5.5% in under-developed countries. It is expected that in 2045 the prevalence of diabetes relatively increase in middle-income countries by 21.1% compared to 12.2% in high-income and 11.9% in low-income countries. Developing countries encounters 80% of the diabetes disease burden with high portion of diabetes type 2 [17]. The estimated outbreak of diabetes in adults aged 20–79 years has more than tripled since 2000, from an estimated 151 million about 4.6% of global population to 537 million that 10.5% today human population [17,20]. It has been predict 643 million people will have diabetes by 2030 (11.3% of the population) and 783 million (12.2%) by 2045 [16]. WHO estimates that between 2000 and 2030, the world population will increase by 37% and the number of people with diabetes will increase by 114%. About 90% of people with undiagnosed diabetes live in developing, low- and middle income countries [16]. World diabetes-related health expenditures were 966 billion USD in 2021 and projected 1,054 billion USD by 2045 (Table 1) [19].

Like other developing countries in South Asia, Pakistan - the fifth most populous country with about more than 229 million population in the world and third highest number of people living with diabetes in the world with 33 million (2021- IDF) adults in Pakistan are living with diabetes - a 70% increase since 2019[16-20]. In 2021, 400,000 deaths in the country due to diabetes. About 11 million adults have Impaired Glucose Tolerance (IGT) that places them at high risk of developing type 2 diabetes [17]. Pakistan has 25% diabetes prevalence in adults. Table 2 shows the top ten countries with the highest comparative prevalence for the years 2021 and 2045. All top ten countries have prevalence of more than 20% but the country with the highest prevalence at 31% is Pakistan which is projected to have a prevalence of over 34% in 2045 [17], Top most causes of blindness and kidney failure in Pakistan is diabetes. Diabetes is the 7th leading cause of disability in all adults and 8th causing factor of deaths in all age groups. Almost 4% of pregnant women have diabetes but only 30% women in rural areas are tested for diabetes in pregnancy (Table 3) [17].

Diabetogenic Factors

The etiology of diabetes in Pakistan is multifactorial disease that can be cause by many factor including genetic susceptibility and environmental factors [21]. Genetic susceptibility is ones which are connect to our gene or it may cause by inheritance and also some epigenetic factor [21]. The genetic factors are related to mutation or single nucleotide polymorphisms while the epigenetic factors include gene methylation, histone modification as well as microRNAs [11]. But along with diabetes has been a chronic disease with a powerful impact on our environment factors such as climate, dietary habits, food production, manufacturing and marketing, social networks, viral infection, psychosocial factors, health services, belief, urbanization, globalization, industrialization and economic transition [13,14,22-28]. That why diabetes is also known as paradigmatic social disease. Diabetes mellitus is usually correlated with its complicated side effect [29]. In Pakistan Due to ignorant and illiterate diabetes since from the being, there has been an increase in its complications along with diabetes (Figure 2) [29].


Climate

Climate change and diabetes are interlinked with each other’s. Temperatures changes can provoke a person's susceptibility to suffers diabetes as well as impose adverse outcomes on those who already diagnosed with diabetes (such as increased incidence of hospitalization, dehydration and mortality) [30]. During extreme heat conditions diabetic patients are at greater possibility of facing cardiovascular and dehydration events. Increase in temperature is directly effect on chance of cardiovascular event and heat related for people living with diabetes. Sudden alter in temperature can affect insulin requirement. Cold weather, can raise insulin need while warm weather, by contrast insulin demands might drops down. Extreme temperatures changes in the body that may lead to a drop or spike in blood sugar. Climates of Pakistan are more dangerous for diabetes sufferers.

Dietary Habits

To maintain a healthy nutritional status at any age is very important. Diabetes mellitus (DM) is a metabolic disease with many systemic complications that can be prevented by dietary modifications and physical exercise. Unhealthy diet is very important factor that contributes toward the diabetes specially type 2 diabetes [31]. Making healthier food choices is important to manage your diabetes and to reduce your risk of diabetes complications [32]. Due to poverty the majority of population living in both urban and rural areas in Pakistan is unable to meet their basic diet and nutrients requirements. The nutritional status and food intake pattern of the population can be affected by various health-related changes. Despite these changes, a healthy lifestyle and proper nutrition can improve the quality of life and nutritional status among the population. Nutrition and physical activity are important parts of a healthy lifestyle when you have diabetes. To manage your blood glucose level, you need to balance what you eat and drink with healthy physical activity and diabetes medicine. There is sufficient evidence that long-term consumption of high fat and sugar rich foods can contribute to diabetes in low and middle income countries like Pakistan [33]. DM are also associated with the deficiency of vitamin D [25,34], lack of sun light exposure [25].

Physical activity

Physical activity has been measured to shrink mortality rates in different population with diabetes mellitus [35] because during exercise, our cells become more sensitive to insulin so it works more effectively to lower your blood glucose. Healthy physical exercise directly effect on the insulin production and blood glucose management [36]. Physical activity has the potential of improving insulin action and resistance and is, therefore, play important role in prevention and treatment of diabetes [37]. Physical activity, sports and exercise should be supported in all persons with diabetes [36,38]. Healthy diet and regular exercise can delay diabetes [39]. The clinical trial proved that a low-fat diet, combined with a walking or other low-intensity exercise daily, decrease the risk of developing diabetes type 2 by 58 percent [39]. As diabetes has become age related disease because of the lack of physical activities in old age. The diabetes patients showed a low level of motivation and they were more unwilling in doing physical activity as they had pain and swelling of feet whenever they started physical activity [29]. Pakistan being an under developing country, most of the population are under poverty so these rick factor may contributes to DM.

Socioeconomic problems

The exponentially prevalence of diabetes seen in the last decade can be attributed mostly as a result of rapid socioeconomic growth to the change in lifestyle [40]. Diabetic patient had to face socioeconomic issues from the society and family that leads them more depressed and early fatigue [29]. The increase in urban population, aging and socioeconomic growth are the main determinants of the rise in prevalence of diabetes in developing world [40,41]. Scio-economic status also contributes to DM prevalence such as education and income, has been associated with increased risk of diabetes [26,27,42]. Current meta-analysis reported that due to illiteracy [42]. Occupational class or status, poverty, and income was associated with DM with almost 30-40 % higher risk [26,27]. Physiological factor mays also cause complication with diabetes such as hypertension, stress and depression [28,43,44] It is estimated that the substantial increase in urbanization, socioeconomic problem in Pakistan might be the risk for diabetes.

Smoking and alcohol drinking

The prevalence of diabetes is to be 45% higher in smokers than among nonsmokers [45]. Smoking and alcohol are also causing factor for diabetes type 2 [24]. Smoking increases the risk of central obesity and insulin resistance and nicotine exposure has several other deleterious effects. Asian countries such as China and India continue to produce and consume tobacco products and hence face a huge public health problem. The increasing use of alcohol in Asian countries, especially among the middle class and rural population, also increases the risk for diabetes and other metabolic diseases.

Pollution and chemicals

Pollution and environmental toxicants acting as endocrine-disrupting chemicals (EDCs) are emerged as novel metabolic diabetes risk factors. Long term exposure to air pollution and endocrine-disrupting chemicals (EDCs) create a high chance of getting DM [46,47]. It has been reported that there is positive associations for prevalence of DM with exposure of nitrogen dioxide (NO2) [48], polycyclic aromatic hydrocarbons (PAHs) [49,50], perfluoroalkyl substances (PFAS) metabolites [51,52], lead, cadmium, mercury, selenium [53], Phenols and phthalates (PAEs) [48,54], Persistent Organic Pollutants (POPs) (including dioxins, polychlorinated biphenyl (PCBs) and organochlorine pesticides (OCPs)) [55,56], arsenic [47,57]. These chemicals and pollutants are highly concentrated in the atmosphere especially in the populated cites of Pakistan.

Complication of diabetes

Diabetes mellitus also have serve complication that can be cause if the diabetic syndrome are prolonged or due to no medication or prevention from diabetogenic factors [3,58-60]. The complication may be chronic or acute vary from person to person. Several complication of diabetes mellitus is nephropathy, which is damage or disease of the kidney, retinopathy (loss of vision), peripheral neuropathy (risk of foot ulcer) [60], periodontal diseases (bone and tissue supporting teeth), sexual dysfunction, and autonomic neuropathy cause gastrointestinal, cardiovascular disorder and genitourinary [59]. If a diabetic patient don’t take an account of the factor that contribute diabetes than there is greater chance of getting these complication.

CONCLUSION

The prevalence of diabetes mellitus in the population of Pakistan is very high and increases at an uncontrollable rate. These environmental factors contribute large proportion in the diabetes prevalence. Moreover, being an under develop country Pakistan doesn’t have a well-developed medical care system for any diseases. By controlling and managing these factors prevalence can be reduced. That as a under developed country Pakistan must take into account of these environmental factor that are becoming a risk factor for the high prevalence of diabetes.

 


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