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Infliximab reduction of inflammation (Crohn’s) greatly aided by Vitamin D – Sept 2015

Role of Vitamin D in Infliximab-induced Remission in Adult Patients with Crohn's Disease.

Inflamm Bowel Dis. 2015 Sep 9. [Epub ahead of print]
Reich KM1, Fedorak RN, Madsen K, Kroeker KI.7
1Division of Gastroenterology, University of Alberta, Edmonton, Alberta, Canada.

VitaminDWiki Summary

All patients treated with infliximab
Vitamin D injections for those with vitamin D deficiency
Dose size not stated in abstract

After 14 weeksLow D and Injection OK D, No injection
Significant reduction in Crohn’s Disease80%23%

Note that infliximab is also used for

  • rheumatoid arthritis,
  • arthritis of the spine,
  • psoriatic arthritis
  • ulcerative colitis
  • chronic plaque psoriasis

See also VitaminDWiki

Gut and Vitamin D Intervention studies on VitaminDWiki

Vitamin D is a key immunomodulator and its deficiency is prevalent among Crohn's patients. The interaction between vitamin D and the response to infliximab induction therapy has not been previously described.

Patients with moderate-severe Crohn's disease, defined as having a modified Harvey Bradshaw index ≥8, who were being induced with infliximab were recruited. Patients were divided into low and normal vitamin D groups. Patients were followed prospectively for 14 weeks for achievement of clinical remission (Harvey Bradshaw index <5). At week 14, vitamin D deficient patients were supplemented with intramuscular cholecalciferol; all patients were re-assessed at week 22. Serum cytokine levels were measured at weeks 0, 14, and 22.

Twenty-eight patients initiating infliximab were included, with 54% of patients in the low vitamin D group. The proportion of patients in clinical remission was greater in the low vitamin D group compared with the normal vitamin D group at both

  • week 14 (80% versus 23%, P = 0.007) and
  • week 22 (79% versus 17%, P = 0.005).

The low vitamin D group had higher baseline IL-6 levels (median, 4.4 [interquartile range, 2.0-5.7] versus 1.1 [0.8-1.7] pg/mL, P = 0.004) and lower interleukin-12 levels (0.3 [0.1-0.4] versus 0.5 [0.5-0.6] pg/mL, P = 0.006) compared with the normal vitamin D group. At week 14, IL-8 levels were significantly lower in the low vitamin D group compared with the normal vitamin D group (11.2 [9.1-13.8] versus 20.5 [17.9-37.2] pg/mL, P = 0.005).

Crohn's patients initiating infliximab with a low vitamin D level are more likely to achieve infliximab-induced clinical remission at week 14.

PMID: 26355467