Bone loss associated with gastrointestinal disease: prevalence and pathogenesis

Area of Science:

• Gastroenterology
• Endocrinology
• Bone Metabolism

Background:

• Decreased bone mineral density (BMD) is a common comorbidity in various gastrointestinal (GI) diseases.
• Several factors contribute to bone loss in GI disorders, including nutrient malabsorption, medication side effects, chronic inflammation, and hormonal imbalances.

Purpose of the Study:

• To review the prevalence and contributing factors of decreased bone mineral density in patients with gastrointestinal diseases.
• To highlight the specific impact of conditions such as gastrectomy, pernicious anemia, celiac disease, Crohn's disease, and ulcerative colitis on bone health.

Main Methods:

• Literature review of studies reporting bone mineral density in patients with gastrointestinal diseases.
• Analysis of contributing factors including malabsorption, glucocorticoid use, inflammatory cytokines, and hypogonadism.

Main Results:

• Low bone mineral density is frequently observed in patients post-gastrectomy (27-44%), pernicious anemia, celiac disease (8-22%), Crohn's disease (32-38%), and ulcerative colitis (23-25%).
• Associated factors include malabsorption of essential nutrients like vitamin D and calcium, glucocorticoid therapy, inflammatory cytokines in inflammatory bowel disease, and disease-induced hypogonadism.

Conclusions:

• Reduced bone mineral density is a significant and prevalent issue in individuals with gastrointestinal diseases.
• The combination of GI disease-related bone loss and age-related bone loss can lead to severe skeletal complications in susceptible patients.