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. 2020 Jan 30;26(1):106–116. doi: 10.5056/jnm19099

Table 4.

Summary of All Significant Variables Found in Irritable Bowel Syndrome Patients

IBS-C (n = 33) IBS-D (n = 21) IBS-M (n = 5)


Male (n = 6) Female (n = 27) Male (n = 12) Female (n = 9) Male (n = 2) Female (n = 3)
Neurotrophic factors
 TRPV1 - -
 NGF - -
 GDNF - -
Tight junction protein
 ZO-1 - - - - -
 OCLN - - - - - -
 CLDN1 - - - - - -
Cytokines
 IL-8 - - - - - -
 TNF-α - - - - - -
 IL-1β - - - - -

IBS-C, constipation type irritable bowel syndrome; IBS-D, diarrhea type irritable bowel syndrome; IBS-M, mixed type irritable bowel syndrome; TRPV1, transient receptor potential vanilloid-1; NGF, nerve growth factor; GDNF, glial derived neurotrophic factor; ZO-1, zonula occludens-1; OCLN, occludin; CLDN1, claudin-1; ↑, significantly increased; ↓, significantly decreased; -, not significant.