Peptic ulcer disease
Clinic
- PUD is a break in the inner lining of the stomach, the first part of the small intestine, or sometimes the lower esophagus.
- Gastric ulcer: Stomach ulcer: Pain may worsen with eating.
- Duodenal ulcer: Ulcer of the first part of the intestines : Waking at night with upper abdominal pain + Upper abdominal pain that improves with eating.
Signs and symptoms[edit]
- Abdominal pain, classically epigastric, strongly correlated with mealtimes. In case of duodenal ulcers, the pain appears about three hours after taking a meal and wakes the person from sleep;
- Bloating and abdominal fullness;
- Waterbrash
- Nausea and copious vomiting;
- Loss of appetite and weight loss, in gastric ulcer
- Weight gain, in duodenal ulcer, as the pain is relieved by eating
- Hematemesis
- Melena
- Rarely, an ulcer can lead to a gastric or duodenal perforation, which leads to acute peritonitis and extreme, stabbing pain, and requires immediate surgery.
- Complications may include bleeding, perforation, and blockage of the stomach. Bleeding occurs in as many as 15% of cases
Causes
| Dynamic | Static | Viral | |
|---|---|---|---|
| Common |
|
|
DHF |
| Uncommon |
|
|
|
Gastrin
- Gastrin is a peptide hormone that stimulates secretion of gastric acid by Parietal cells of the stomach and aids in gastric motility.
- It is released by G cells in the pyloric antrum of the stomach, duodenum, and the pancreas.
- Gastrin is released in response to certain stimuli including
- Stomach antrum distension
- Vagal stimulation
- Presence of partially digested proteins, especially amino acids, in the stomach. Aromatic amino acids are particularly powerful stimuli for gastrin release.
- Hypercalcemia
- Gastrin release is inhibited by
- Presence of acid in stomach
- Somatostatin
Function
G cell is visible near bottom left, and gastrin is labeled as the two black arrows leading from it. Note: this diagram does not illustrate gastrin's stimulatory effect on ECL cells. The presence of gastrin stimulates parietal cells of the stomach to secrete hydrochloric acid (HCl)/gastric acid. This is done both directly on the parietal cell[failed verification] and indirectly via binding onto CCK2/gastrin receptors on ECL cells in the stomach, which then responds by releasing histamine, which in turn acts in a paracrine manner on parietal cells stimulating them to secrete H+ ions. This is the major stimulus for acid secretion by parietal cells.
Along with the above-mentioned function, gastrin has been shown to have additional functions as well:
- Stimulates parietal cell maturation and fundal growth.
- Causes chief cells to secrete pepsinogen, the zymogen (inactive) form of the digestive enzyme pepsin.
- Increases antral muscle mobility and promotes stomach contractions.
- Strengthens antral contractions against the pylorus, and relaxes the pyloric sphincter, which increases the rate of gastric emptying.
- Plays a role in the relaxation of the ileocecal valve.
- Induces pancreatic secretions and gallbladder emptying.
- May impact lower esophageal sphincter (LES) tone, causing it to contract, - although pentagastrin, rather than endogenous gastrin, may be the cause.
- Gastrin contributes to the gastrocolic reflex.
Role in disease
In the Zollinger–Ellison syndrome, gastrin is produced at excessive levels, often by a gastrinoma gastrin-producing tumor, mostly benign of the duodenum or the pancreas. To investigate for hypergastrinemia high blood levels of gastrin, a "pentagastrin test" can be performed.
In autoimmune gastritis, the immune system attacks the parietal cells leading to hypochlorhydria low stomach acid secretion. This results in an elevated gastrin level in an attempt to compensate for increased pH in the stomach. Eventually, all the parietal cells are lost and achlorhydria results leading to a loss of negative feedback on gastrin secretion. Plasma gastrin concentration is elevated in virtually all individuals with mucolipidosis type IV (mean 1507 pg/mL; range 400-4100 pg/mL) (normal 0-200 pg/mL) secondary to a constitutive achlorhydria. This finding facilitates the diagnosis of patients with this neurogenetic disorder. Additionally, elevated gastrin levels may be present in chronic gastritis resulting from H pylori infection.
Tissue Salt Remedies
- NP