Ignite Creation Date:
2025-12-24 @ 4:34 PM
Ignite Modification Date:
2025-12-28 @ 3:48 AM
Study NCT ID:
NCT00543166
Status:
UNKNOWN
Last Update Posted:
2007-11-05
First Post:
2007-10-09
Is NOT Gene Therapy:
True
Has Adverse Events:
False
Brief Title:
Sex Steroids in Sjögren's Syndrome: Effect of Substitution Treatment on Fatigue
Sponsor:
University of Helsinki
Organization:
Study Overview
Official Title:
Sex Steroids in Sjögren's Syndrome: Effect of Substitution Treatment on Fatigue
Status:
UNKNOWN
Status Verified Date:
2007-10
Last Known Status:
ACTIVE_NOT_RECRUITING
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
Our research contributes to the understanding of some of the basic biology of the salivary glands. The etiology and many of the pathomechanisms of Sjögren's syndrome are unknown. In particular, reasons for the female dominance, late age of onset, fatigue and the prominent involvement of exocrine glands are unknown. We hypothesize, due to the disease characteristics, that the primary target hit by the disease process is the secretory acinar cell and that this cell is particularly damaged in women due to insufficient support, normally provided by dehydroepiandrosterone and its intracrine processing.
Detailed Description:
We hypothesize, due to the Sjögren's syndrome (SS) disease characteristics, that the primary target hit by the disease process is the secretory acinar cell and that this cell is particularly in women damaged due to insufficient support, normally provided by dehydroepiandrosterone and its intracrine processing. Dehydroepiandrosterone deficiency at the time of adrenopause seems to us as the more likely endocrine trigger than estrogen deficiency caused by menopause as androgens in general are considered to be protective against autoimmunity and estrogens to favor it. Acinar cell is normally responsible for the production of primary saliva. Acinar cell damage can lead to acinar cell apoptosis and loss. Normally this is compensated by division of the acinar cells in situ or, according to recent reports, perhaps rather by division and subsequent migration of one of the daughter cells into the acinar space and transdifferentiation of this intercalated ductal cell progenitor into mature acinar cell. In SS this remodeling seems to be impaired, perhaps for the same reason, which also leads to primary acinar cell damage. According to this hypothesis, the primary changes occur in the salivary glands and more specifically in the acinar cells, whereas immune activation and autoimmunity are secondarily activated against abnormally damaged acinar cells so that individuals with the "right" genetic background also produce SS-A and SS-B antibodies. The cause of the acinar cell damage may not be a direct, damaging stimulus, e.g. virus infection or irradiation damage, but rather lack of a supporting anabolic stimulus and inadequate maintenance of the acinar cell health leading to cytopathic acinar cell changes. In peri-menopausal women (who still produce some estrogens) this abnormal antigen release and processing from acinar cells, which reveals cryptic epitopes, together with autoimmunity enhancing effects of estrogens, may lead to the full picture of SS (Cutolo et al., 2004).
This neuroimmunoendocrine working hypothesis would explain many central disease characteristics, but does not provide a final answer to the mystery of this intriguing syndrome as the reasons for the insufficient production and generation of DHEA remain to be solved. We have done some preliminary studies to analyze this topic by mapping the signals of the extracellular matrix in the adrenal cortex, where the cells proliferate in the outer zone and subsequently migrate in a centripetal direction, during which phenotypic transition occurs from the outer zone (zona glomerulosa) cells producing aldosterone to the intermediate zone (zona fasciculata) cells producing glucocorticosteroids and finally to the inner zone (zona reticularis) cells producing DHEA. However, in this research project we have decided to totally focus on the salivary gland acinar cell-sex steroid interactions.
This neuroimmunoendocrine working hypothesis would explain many central disease characteristics, but does not provide a final answer to the mystery of this intriguing syndrome as the reasons for the insufficient production and generation of DHEA remain to be solved. We have done some preliminary studies to analyze this topic by mapping the signals of the extracellular matrix in the adrenal cortex, where the cells proliferate in the outer zone and subsequently migrate in a centripetal direction, during which phenotypic transition occurs from the outer zone (zona glomerulosa) cells producing aldosterone to the intermediate zone (zona fasciculata) cells producing glucocorticosteroids and finally to the inner zone (zona reticularis) cells producing DHEA. However, in this research project we have decided to totally focus on the salivary gland acinar cell-sex steroid interactions.
Study Oversight
Has Oversight DMC:
True
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?: