Dominic Stone
Gastric ulcers, also known as stomach ulcers, are open sores that develop on the lining of the stomach. They can be caused by a bacterial infection with H. pylori, which affects the mucus that protects the stomach lining, or by the long-term use of non-steroidal anti-inflammatory drugs (NSAIDs), which irritate the stomach lining and make it more susceptible to damage from stomach acid. While the direct link between gastric ulcers and smooth muscle damage is not entirely clear, it is known that untreated ulcers can lead to serious complications, including bleeding, perforation of the stomach wall, and obstruction of the normal passage of food through the digestive system.
| Characteristics | Values |
|---|---|
| Definition | An open sore in the stomach lining |
| Causes | H. pylori bacterial infection, overuse of NSAIDs, Zollinger-Ellison syndrome, severe physiological stress, certain medications like aspirin, clopidogrel, and arthritis drugs |
| Symptoms | Burning or gnawing pain in the abdomen, indigestion, vomiting blood, black or tarry stool, blood in stool |
| Treatment | Antacids, mucosal protective medicines, proton pump inhibitors, lifestyle changes (quitting smoking), surgery |
| Prevention | Reducing NSAID doses, altering arthritis medication, avoiding aspirin and other anti-inflammatory drugs |
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What You'll Learn
H. pylori bacterial infection
A gastric ulcer, or stomach ulcer, is an open sore in the stomach lining. It is a common cause of focal stomach pain. The two most common causes of stomach ulcers are the H. pylori bacterial infection and overuse of non-steroidal anti-inflammatory drugs (NSAIDs). H. pylori is a very common bacterial infection that affects up to half of the world's population.
H. pylori (Helicobacter pylori) is a type of bacteria that infects the stomach and duodenum (the first part of the small intestine). It is the most common chronic bacterial infection in humans. H. pylori bacteria are spiral-shaped and can live in the harsh acidic environment of the stomach by producing enzymes that neutralise the acid. This allows H. pylori to burrow into the stomach lining, causing chronic inflammation and irritation. H. pylori can spread from person to person and is commonly found in saliva, faeces, and plaque on teeth. Infection can spread by transferring the bacteria from the hands of those who haven't thoroughly washed them after defecating. Risk factors for H. pylori infection include living in crowded conditions, lacking a reliable supply of clean water, and living in a developing country.
H. pylori infections can lead to sores called peptic ulcers in the lining of the stomach or small intestine. Peptic ulcers are painful open sores in the digestive tract. They are the most common complication of H. pylori, with about 10-15% of infected people developing an ulcer. H. pylori is the leading cause of peptic ulcers. In rare cases, H. pylori infections can also lead to stomach cancer.
Treatment for H. pylori infections includes antibiotics and proton pump inhibitors. Most ulcers caused by H. pylori will heal after a few weeks. Once the H. pylori bacteria is removed, most ulcers do not come back.
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Overuse of NSAIDs
A gastric ulcer, or stomach ulcer, is an open sore in the stomach lining. It is a common cause of focal stomach pain, often with a burning or gnawing quality. The two most common causes of stomach ulcers are the H. pylori bacterial infection and overuse of non-steroidal anti-inflammatory drugs (NSAIDs). NSAIDs are common over-the-counter pain relievers, such as ibuprofen, naproxen, and aspirin, which reduce inflammation, pain, and fever. They are frequently used by athletes to manage muscle soreness, expedite recovery, or improve performance.
NSAIDs irritate the stomach lining on contact and inhibit some of the chemicals that defend and repair it. Long-term use can damage the mucus that protects the stomach lining, allowing stomach acid to get through to the lining and cause an ulcer. NSAIDs can also slow the body's natural healing process, making it harder for ulcers to heal. People who take NSAIDs regularly are at a higher risk of developing stomach ulcers, and those with existing ulcers should avoid taking NSAIDs as they can worsen the condition.
To reduce the risk of developing a stomach ulcer, it is recommended to always take NSAIDs with food, preferably during a full meal. If a person is experiencing side effects from taking NSAIDs, they should consult a healthcare provider to weigh the risks and benefits of the medication and find an alternative treatment if necessary. In some cases, altering the dosage or switching to a different medication may be recommended.
While NSAIDs can contribute to the development of stomach ulcers, they do not directly cause damage to smooth muscle. Smooth muscles are the muscles that the body does not control, such as those found in the intestine, stomach, and blood vessels.
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Zollinger-Ellison syndrome
The diagnosis of Zollinger-Ellison syndrome can be challenging, particularly in patients who take proton pump inhibitors (PPIs) for gastric reflux. PPIs can lead to elevated gastrin levels, potentially resulting in false positives. To establish a definitive diagnosis, various laboratory tests and imaging studies are employed, including the secretin stimulation test, measurement of fasting gastrin levels, and assessment of gastric acid secretion and pH levels.
The treatment for Zollinger-Ellison syndrome may involve medications and, in some cases, surgery. While the ulcers can typically be managed with proper treatment, untreated cases can lead to severe complications. It is important for individuals experiencing symptoms suggestive of the syndrome or exhibiting resistance to standard treatments to seek medical attention for a thorough evaluation and appropriate care plan.
The symptoms of Zollinger-Ellison syndrome include abdominal pain, nausea, vomiting, weight loss, and diarrhoea. The peptic ulcers associated with the syndrome are typically located in the duodenum, the first part of the small intestine, and occasionally in the jejunum, the second part of the small intestine. In some cases, the ulcers may be found in other parts of the intestine as well.
The syndrome was first described by surgeons Robert M. Zollinger and Edwin H. Ellison in 1955, who identified a link between pancreatic tumours and unusual cases of peptic ulceration. While the exact mechanisms underlying the development of Zollinger-Ellison syndrome are still being studied, it is known that the presence of gastrinomas plays a crucial role in the excessive production of gastric acid, leading to the formation of painful peptic ulcers.
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Gastric mucosa protection
The gastric mucosa is continuously exposed to various noxious factors and substances. Gastric mucosal defence mechanisms are essential to protect the stomach against hydrochloric acid and other noxious agents. The pre-epithelial protection is provided by the mucus-bicarbonate barrier, which creates a pH gradient to maintain the epithelial cell surface at a near-neutral pH. This barrier is formed by mucus gel, bicarbonate, and surfactant phospholipids, which cover the mucosal surface and prevent pepsin from penetrating and causing proteolytic digestion of the surface epithelium.
Mucus gel, composed of water and mucin glycoproteins, is secreted by apical expulsion from surface epithelial cells. Mucin, the major constituent of mucus, is biosynthesized and secreted by mucus-producing cells. The gel-forming mucin units polymerize into large mucin multimers, which are essential for gel formation. The hydrophobic lining of the gastric mucosal barrier further protects the lumen of the stomach.
Prostaglandins, sucralfate, aluminium-containing antacids, carbenoxolone, and bismuth are among the agents that have been found to be protective of the gastric mucosa. Prostaglandins, for example, may maintain blood flow and prevent vascular endothelial injury caused by ethanol. Bismuth subsalicylate has also been shown to provide gastroprotection against chemically induced oxidative stress in human gastric mucosal cells.
Mucosal protective medicines are available to treat gastric ulcers by protecting the stomach's mucus lining from acid damage and promoting healing. Antacids are also used to neutralize stomach acid and alleviate symptoms.
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NSAID-induced ulceration
A gastric ulcer, or stomach ulcer, is an open sore in the stomach lining. It is a common cause of focal stomach pain, often with a burning or gnawing quality. The two most common causes of stomach ulcers are the H. pylori bacterial infection and the overuse of non-steroidal anti-inflammatory drugs (NSAIDs). NSAIDs are common over-the-counter pain relievers, such as ibuprofen, aspirin, and naproxen. They irritate the stomach lining and inhibit the chemicals that defend and repair it. NSAIDs can cause damage to the gastroduodenal mucosa through several mechanisms, including the topical irritant effect on the epithelium, impairment of the barrier properties of the mucosa, and suppression of gastric prostaglandin synthesis. The presence of acid in the lumen of the stomach also contributes to the pathogenesis of NSAID-induced ulcers.
NSAID-induced ulcer disease is a significant concern, as gastroduodenal ulceration and bleeding are the major limitations to the use of NSAIDs. The development of safer NSAIDs or effective therapies for preventing adverse effects requires a better understanding of the pathogenesis of NSAID-induced ulcer disease. Proton pump inhibitors (PPIs) have been investigated as a potential treatment option for NSAID-induced ulcer disease. PPIs have been shown to significantly reduce the risk of endoscopic duodenal and gastric ulcers compared to a placebo. However, there is a lack of direct comparison between PPIs and double-dose H2RAs for NSAID risk reduction.
Morin has also been suggested as a safe herbal potential agent against NSAID-induced gastropathy. Rats pretreated with morin showed positive effects on inflammatory, ulcer-healing, and signaling parameters. Additionally, PPIs, when given alongside an NSAID, have been studied to determine if they could prevent the well-characterized injury caused by NSAIDs. The results showed that PPIs significantly reduced the risk of both endoscopic duodenal and gastric ulcers.
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Frequently asked questions
A gastric ulcer, or stomach ulcer, is an open sore that develops on the lining of the stomach.
A gastric ulcer is caused by the H. pylori bacterial infection, which eats into the stomach lining, causing chronic inflammation. NSAIDs, or non-steroidal anti-inflammatory drugs, can also irritate the stomach lining, making it more prone to damage. This damage can cause bleeding and holes in the stomach wall.
The most common symptom is a burning or gnawing pain in the centre of the abdomen. However, not all stomach ulcers are painful. Other symptoms include indigestion, vomiting blood, and black or tarry stool.
Gastric ulcers are usually treated with medication that protects the stomach lining and neutralises stomach acid. In rare cases, surgery may be required if the ulcer causes other medical problems.
To prevent a gastric ulcer, avoid long-term use of NSAIDs such as ibuprofen, aspirin, and naproxen. Lifestyle changes such as quitting cigarettes can also help, as smoking reduces the natural defences in the stomach.
