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Normal ranges for both ALT and AST vary by gender, age, and geography and are roughly 8-40 U/L (0.14-0.67 μkal/L). [4] Mild transaminesemia refers to levels up to 250 U/L. [ 1 ] Drug-induced increases such as that found with the use of anti-tuberculosis agents such as isoniazid are limited typically to below 100 U/L for either ALT or AST.
[11] [12] [13] Levels in the third trimester can be as much as 2-fold greater than in non-pregnant women. [11] As a result, ALP is not a reliable marker of hepatic function in pregnant women. [11] In contrast to ALP, levels of ALT, AST, GGT, and lactate dehydrogenase are only slightly changed or largely unchanged during pregnancy. [11]
Alanine transaminase (ALT), also known as alanine aminotransferase (ALT or ALAT), formerly serum glutamate-pyruvate transaminase (GPT) or serum glutamic-pyruvic transaminase (SGPT), is a transaminase enzyme (EC 2.6.1.2) that was first characterized in the mid-1950s by Arthur Karmen and colleagues. [1]
The proportion of AST to ALT in hepatocytes is about 2.5:1, but because AST is removed from serum by the liver sinusoidal cells twice as quickly (serum half-life t 1/2 = 18 hr) compared to ALT (t 1/2 = 36 hr), so the resulting serum levels of AST and ALT are about equal in healthy individuals, resulting in a normal AST/ALT ratio around 1.
The symptoms are non-specific and vary widely, but it may present with the classical triad of: abdominal pain, ascites, and; liver enlargement. It is usually seen in younger adults, with the median age at diagnosis between 35 and 40 years, and it has a similar incidence in males and females. [2]
The study, which involved 106 peri- and postmenopausal women and was presented at the Endocrine Society’s annual meeting in May, indicates women should self-monitor their vasomotor symptoms and ...
Using this more inclusive definition, the global prevalence of MAFLD is an astonishingly high 50.7%. [40] Indeed, also using the old NAFLD definition, the disease is observed in up to 80% of obese people, 35% of whom progress to NASH, [ 41 ] and in up to 20% of normal weight people, [ 10 ] despite no evidence of excessive alcohol consumption.
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