Changes in salivary physiological stress markers induced by muscle stretching in patients with irritable bowel syndrome - PubMed (original) (raw)

Changes in salivary physiological stress markers induced by muscle stretching in patients with irritable bowel syndrome

Toyohiro Hamaguchi et al. Biopsychosoc Med. 2008.

Abstract

Background: Psychophysiological processing has been reported to play a crucial role in irritable bowel syndrome (IBS) but there has been no report on modulation of the stress marker chromogranin A (CgA) resulting from muscle stretching. We hypothesized that abdominal muscle stretching as a passive operation would have a beneficial effect on a biochemical index of the activity of the sympathetic/adrenomedullary system (salivary CgA) and anxiety.

Methods: Fifteen control and eighteen untreated IBS subjects underwent experimental abdominal muscle stretching for 4 min. Subjects relaxed in a supine position with their knees fully flexed while their pelvic and trunk rotation was passively and slowly moved from 0 degrees of abdominal rotation to about 90 degrees or the point where the subject reported feeling discomfort.Changes in the Gastrointestinal Symptoms Rating Scale (GSRS), State Trait Anxiety Inventory (STAI), Self-rating Depression Scale (SDS), ordinate scale and salivary CgA levels were compared between controls and IBS subjects before and after stretching. A three-factor analysis of variance (ANOVA) with period (before vs. after) as the within-subject factor and group (IBS vs. Control), and sex (men vs. female) as the between-subject factors was carried out on salivary CgA.

Results: CgA showed significant interactions between period and groups (F[1, 31] = 4.89, p = 0.03), and between groups and sex (F[1, 31] = 4.73, p = 0.03). Interactions between period and sex of CgA secretion were not shown (F[1, 3] = 2.60, p = 0.12). At the baseline, salivary CgA in IBS subjects (36.7 +/- 5.9 pmol/mg) was significantly higher than in controls (19.9 +/- 5.5 pmol/mg, p < 0.05). After the stretching, salivary CgA significantly decreased in the IBS group (25.5 +/- 4.5 pmol/mg), and this value did not differ from that in controls (18.6 +/- 3.9 pmol/mg).

Conclusion: Our results suggest the possibility of improving IBS pathophysiology by passive abdominal muscle stretching as indicated by CgA, a biochemical index of the activity of the sympathetic/adrenomedullary system.

PubMed Disclaimer

Figures

Figure 1

Figure 1

Three-way repeated-measures ANOVA of CgA showed significant interactions between period and groups (F[1, 31] = 4.89, p = 0.03). *a: Before stretching, salivary CgA in IBS subjects (36.7 ± 5.9 pmol/mg) were significantly higher than in Normal controls (19.9 ± 5.5 pmol/mg, post-hoc, p = 0.006). A significant CgA change between before and after stretching in Normal controls was not shown (post-hoc, p = 0.60). *b: CgA was significantly decreased after stretching in IBS subjects (22.5 ± 4.5 pmol/mg, post-hoc, p = 0.02). After stretching, there was no significant difference in CgA between Normal controls and IBS subjects (post-hoc, p = 0.22). Error bars are mean ± standard error.

References

    1. Kanazawa M, Endo M, Yamaguchi K, Hamaguchi T, Whitehead WE, Itoh M, Fukudo S. Classical conditioned response of rectosigmoid motility and regional cerebral activity in humans. Neurogastroenterol Motil. 2005;17:705–713. -PubMed
    1. Hamaguchi T, Kano M, Rikimaru H, Kanazawa M, Itoh M, Yanai K, Fukudo S. Brain activity during distention of the descending colon in humans. Neurogastroenterol Motil. 2004;16:299–309. -PubMed
    1. Creed F, Guthrie E. Psychological factors in the irritable bowel syndrome. Gut. 1987;28:1307–1318. -PMC -PubMed
    1. Drossman DA. Personality and psychological factors in the irritable bowel syndrome. Gastroenterol Clin Biol. 1990;14:49C–53C. -PubMed
    1. Ditto B, Miller SB, Barr RG. A one-hour active coping stressor reduces small bowel transit time in healthy young adults. Psychosom Med. 1998;60:7–10. -PubMed

LinkOut - more resources