Type 2 Diabetes Mellitus And Their Management

A metabolic disease called diabetes mellitus is typified by elevated blood glucose levels brought on by a malfunctioning or relative lack of insulin secretion. Chronic hyperglycaemia is linked to an increased risk of cardiovascular disease (CVD) and relatively specific long-term microvascular consequences that affect the kidneys, nerves, and eyes. The bloodstream is responsible for delivering glucose to the body's cells, which need it as a food source. However, without the hormone insulin, they are unable to absorb and use glucose. However, without the hormone insulin, they are unable to absorb and use glucose. The pancreas produces this hormone, insulin. Insulin functions similarly to a key that opens the door to separate our blood sugars from cells. The hallmark of diabetes mellitus is a disruption in the metabolism of fat, protein, and carbohydrates brought on by a total or partial lack of insulin action and/or secretion.^[1] In the context of insulin resistance, diabetes is a complicated, long-term condition marked by inadequate β-cell insulin production. One of the biggest challenges to global health today is diabetes, which ranks among the top three noncommunicable diseases and is responsible for more than 80% of all early deaths from noncommunicable diseases. It is also one of the top 10 causes of mortality globally. Its widespread occurrence worldwide. Its global prevalence has rapidly increased over the past several decades.^[2]

Fig no. 1. Elevation of blood glucose

Risk factors for Diabetes mellitus:

• Insulin resistance
• Age
• Weight
• Diet
• Family history

Symptoms of Diabetes mellitus:

• Polydipsia (Feeling thirstier)
• Polyuria (Urinating a lot)
• Bed-wetting in children who have never wet the bed during the night
• Polyphagia (Feeling very hungry)
• Weight loss
• Feeling irritable or having other mood changes
• Feeling tired and weak
• Blurry vision

5. Pathophysiology of Diabetes:

A healthy physiological state is created and maintained by the coordinated action of several systems and pathways in the human body. The ability of the body to maintain homeostasis, or a steady, stable condition, is at the heart of these processes. In different organs, an injury or diseased state develops as a result of an imbalance in homeostasis. Diabetes mellitus. impairs a person's capacity to control blood glucose levels, which can lead to a number of serious and moderate problems. ^[4,13]

5. Types Of Diabetes Mellitus:

1. Hormone Dependent diabetes (Type ? IDDM)

The chronic illness known as type I diabetes mellitus (T1DM) is typified by the body's incapacity to manufacture insulin as a result of the autoimmune destruction of the pancreatic beta cells. It causes hyperglycaemia. This kind was once known as "juvenile diabetes" or "insulin-dependent diabetes mellitus" (IDDM).^[3] According to the International Diabetes Federation, 8.8% of the adult population globally has diabetes14. kind 2 diabetes mellitus (T2DM) is the most prevalent kind of diabetes, with only 10–15% of those with diabetes having T1DM. Nonetheless, T1DM is the most prevalent type of diabetes in children, affecting 500,000 children worldwide at the moment.^[5]

Risk factor for type I Diabetes mellitus:

• Family history: Having a parent, brother, or sister with type 1 diabetes.
• Age: Diabetes mellitus is a condition that can developed at any age, but it usually develops in children, teens, or young adult.

Symptoms of type I Diabetes mellitus:

• Polydipsia (excessive thirst)
• Polyuria (Urinating a lot)
• Polyphagia (Feeling very hungry)
• Weight loss
• Feeling irritable or having other mood changes
• Feeling tired and weak
• Blurry vision

2. Non-Insulin Dependent polygenic disorder Mellitus (Type ? NIDPDM)

insulin resistance as a backdrop for the increasing insulin secretary malfunction. Insulin resistance is a common feature of this kind of diabetes. This kind was once known as "adult-onset diabetes" or "non-insulin-dependent diabetes mellitus" (NIDDM). Being overweight and not exercising enough are the main causes. The body produces insulin when insulin resistance occurs, however insulin sensitivity is decreased and the insulin does not function as well as it should.^[5] Two issues result from the glucose's improper entry into the body's cells: • An accumulation of glucose in the blood; and • The cells' inability to get the glucose required for growth and energy. Type 2 diabetes is a worldwide health crisis. In the U.S., 20.8 million are affected at a cost of 2 billion in 2002, and the numbers will likely continue to increase. The Centres for Disease Control and Prevention estimates there are more than 40 million people in the U.S. with prediabetes. Given that the Diabetes Prevention Program showed an 11% yearly conversion rate of impaired glucose tolerance (IGT) to diabetes, there could be as many as 4 million new cases each year. Furthermore, the incidence of type 2 diabetes is rising around the world, with a recent prediction that the worldwide prevalence will increase from 2.8% in 2000 to 4.4% in 2030, resulting in 366 million affected people. ^[6]

Risk factor for type ? Diabetes mellitus:

• Obesity
• Family history and genetics

Symptoms of type ? Diabetes mellitus:

• Polyuria
• Blurry vision
• Polydipsia
• Fatigue
• Peripheral neuropathy
• Slow healing wound

3. Gestational diabetes

Gestational diabetes mellitus (GDM) is the term used to describe glucose intolerance that is discovered or first experienced during pregnancy. Pregnant women with undetected asymptomatic Type 2 diabetes mellitus and those who develop Type 1 diabetes mellitus are both considered to have gestational diabetes mellitus (GDM). In gestational diabetes mellitus (GDM), a hormone produced by the placenta interferes with the body's ability to use insulin. Rather than being absorbed by the cells, glucose accumulates in the circulation.^[7]

Risk factor for gestational Diabetes mellitus:

• Overweight or obesity
• Family history of diabetes
• Having given birth previously to an infant weighing greater than 9 pounds
• Age (women who are older than 25 are at a greater risk for developing gestational           diabetes than younger women)
• Race (women who are African-American, American Indian, Asian American, Hispanic or Latino, or Pacific Islander have a higher risk).

Symptoms of gestational Diabetes mellitus:

• Polydipsia
• Polyuria

5. The worldwide epidemiology of Type ? Diabetes mellitus:

Over the previous three decades, the number of people with diabetes mellitus has more than doubled globally.2. Type 2 diabetes mellitus (T2DM) accounted for 90% of the estimated 285 million individuals with diabetes mellitus globally in 2010.One By 2030, it is anticipated that 439 million people worldwide would have diabetes mellitus, accounting for 7.7% of all adults aged 20 to 79 nationwide.^[8]

Fig no. 2: In each box, the top and middle values represent the number of people with diabetes mellitus (in millions) in each of seven world regions (depicted with different colours) for 2010 and 2030, respectively; the bottom value is the percentage increase from 2010 to 2030. The number of people globally with diabetes mellitus is projected to rise from 285 million in 2010 to 439 million by 2030, a 54% increase.

Fig no. 3: The number of people with diabetes mellitus and IGT (in millions) by region among adults aged 20–79 years for the years 2010 and 2030. Data courtesy of the International Diabetes Federation Diabetes Atlas.114 Abbreviation: IGT, impaired glucose tolerance.

5. Diagnosis test of Diabetes mellitus:

1. A1C LEVEL:

The proportion of glycosylation of the haemoglobin A1C chain is known as A1C, and it roughly represents the average blood glucose levels throughout the preceding two to three months due to the body's gradual red blood cell turnover.^[9]

2. Fasting blood glucose test (F.B.G.T):

For at least eight hours prior to the test, you should only consume water (fast) and nothing else. Blood sugar can be significantly impacted by food. Your provider can view your baseline blood sugar levels with this test.^[10]

Table no.2: Glucose level in Fasting blood glucose test.

3. Oral glucose tolerance test (O.G.T.T.):

The ability of the body to absorb, utilize, and eliminate glucose from the bloodstream is measured by the oral glucose tolerance test (OGTT). It is safe for both adults and children and is also known as a glucose tolerance test. You don't eat for a time before doing the test, and then you sip a syrupy solution. To find out how your body is responding to the sugar in the beverage, a few blood samples are drawn.^[11]

Table no.3: Glucose level in Oral glucose tolerance test.

4. Random plasma glucose test (R.P.G.T):

When you exhibit signs of diabetes and your doctor does not want to wait until you have fasted for eight hours, they may perform the random plasma glucose test to make the diagnosis. This blood test can be performed at any time.^[12] When blood glucose levels are 200 mg/dL or higher, diabetes is diagnosed.

5. Treatments of Type ? Diabetes Mellitus:

Currently, there are many different ways to manage diabetes mellitus. It may be difficult for the doctors to find the proper combination. Doctors choose the appropriate course of treatment based on the type and severity of diabetes mellitus.

Different treatment options for Diabetes Mellitus;

• Healthy eating.
• Regular exercise.
• Weight loss.
• Blood sugar monitoring.
• Non-insulin Diabetes medication.
• Novel drug delivery system for antidiabetic drugs for T2DM

1. Healthy eating:

There's no specific diabetes diet. However, it's important to centre your diet around:

• A regular schedule for meals and healthy snacks.
• Smaller portion sizes.
• More high-fibres foods, such as fruits, no starchy vegetables and whole grains.
• Fewer refined grains, starchy vegetables and sweets.
• Modest servings of low-fat dairy, low-fat meats and fish.
• Healthy cooking oils, such as olive oil or canola oil.
• Fewer calories.

2. Physical activity:

Maintaining a healthy weight or reducing weight requires exercise. It also helps with managing blood sugar. Before beginning or altering your exercise regimen, consult your healthcare professional to be sure the activities are safe for you.

• Aerobic exercise. 
• Resistance exercise. 
• Limit inactivity

3. Weight loss:

Losing weight improves blood pressure, cholesterol, triglycerides, and blood sugar regulation. After lowering even 5% of your body weight, overweight people may start to notice changes in these areas. However, the health benefits increase with the amount of weight you reduce. It may be advised in certain situations to reduce body weight by up to 15%.

4. Monitoring your blood sugar:

To ensure that you stay within your goal range, your healthcare practitioner will advise you on how frequently to check your blood sugar level. For instance, you might need to check it once daily and either before or after working out. You might need to check your blood sugar several times a day if you use insulin.

5. Non-insulin treatment:

A number of non-insulins based oral therapies have emerged for the treatment of type 2 DM. These are categorized under the following sub-headings ^[14].

1. Herbal Medicines
2. Insulin Secretagogues
3. Biguanides
4. Insulin Sensitizers
5. Alpha Glucosidase Inhibitors
6. Amylin antagonists
7. SGLT2 inhibitors

1. Herbal Medicines:

Several plant extracts were tested to corroborate their synergistic and multifactorial acts towards DM. Here are represented a few of those ^[15].

Table no.4: Herbal drug for treatment of Type ? D.M.:

2. Insulin Secretagogues:

By attaching to the sulfonylurea receptor (SUR) of the ATP-sensitive potassium channel on pancreatic β cells, these medications—particularly sulfonyl urea’s and metiglinides—increase the amount of insulin secreted by the pancreas. ^[20]

Table no.5: Insulin Secretagogues drug for treatment of Type ? D.M.:

3. Biguanides:

It functions by enhancing the body's reaction to natural insulin, lowering intestinal glucose absorption, and lowering the quantity of glucose the liver produces. By promoting glycolysis and inhibiting gluconeogenesis, biguanides lower the amount of glucose produced by the liver. By raising insulin receptor activation, they raise insulin signalling.^[23]

Table no.6: Biguanides drug for treatment of Type ? D.M.:

4. Insulin Sensitizers:

Another name for the insulin sensitizers is PPARs, or peroxisome proliferator activated receptor agonists. PPARs control the metabolism of proteins and carbohydrates and preserve glucose homeostasis. These are ligand-activated transcription factors that belong to the nuclear hormone receptor superfamily ^[25].

Table no.7: Insulin Sensitizers drug for treatment of Type ? D.M.:

5. Alpha Glucosidase Inhibitors:

By shifting the undigested carbohydrate toward the distal portion of the small intestine and colon, AGIs slow down the process of carbohydrate absorption in the gastrointestinal tract and assist lower postprandial hyperglycaemia ^[29].

Table no.8: Alpha Glucosidase Inhibitors drug for treatment of Type ? D.M.:

6. Amylin antagonists:

A single chain of 37 amino acids makes up the hormone amylin. It is co-secreted by the pancreatic β cells together with insulin. It keeps blood glucose levels stable during fasting and after meals by delaying stomach emptying and inhibiting glucagon secretion. By altering the brain's appetite centre, it controls how much food is consumed ^[32].

Table no.9: Amylin antagonists’ drug for treatment of T ? D.M.:

7. Sodium glucose co-transporter ? inhibitors (SGLT2):

Reabsorption of glucose in proximal convoluted tubule (PCT) is done by transporter, sodium glucose co-transporter (SGLT) [34]. SGLT2 inhibitors suppress the SGLT2 found in PCT which limits reabsorption of glucose and improves the elimination of glucose in urine. As glucose is eliminated in urine, the glucose level in the blood is maintained and other glycaemic parameters are maintained ^[35].

Table no.10: Sodium glucose co-transporter 2 inhibitors drug for treatment of Type ? D.M.:

6. Novel drug delivery system for antidiabetic drugs:

Some drawbacks of traditional drug delivery methods include reduced potency or altered effects as a result of drug metabolism, lack of target specificity, and ineffectiveness due to incorrect or ineffective dosage [37, 38]. Because of its advantages in lowering the frequency of doses, improving bioavailability, preventing degradation in an acidic stomach environment, and providing tailored therapeutic efficacy with fewer side effects, novel drug delivery systems (NDDSs) have become one of the newest and most promising topics in recent years ^[39].

Table no.11: Novel drug delivery system drug for treatment of Type ? D.M.:

CONCLUSION: