
AUGUST 2026
About the laboratory
Roughly 60% of body weight is fluid. Around two-thirds of this is intracellular (within cells), approximately one quarter is interstitial (between cells), 8% or so is plasma (blood), and about 1% is transcellular.
Transcellular fluids are the specialized substances within defined compartments — such as the choroid plexus (cerebrospinal fluid), eye (vitreous humor), joints (synovial fluid), and the female reproductive tract (vaginal, cervical, uterine, oviductal, and follicular fluids). We study this overlooked 1%, alongside select interstitial fluids that bathe our cells.
Our primary focus is the uterine cavity, where maternal-embryo communication is orchestrated, in addition to the endometrial interstitium, where systemic endocrine and local epithelial-stromal juxtacrine and paracrine communication coordinates monthly endometrial regeneration.
Rather than studying cells in isolation, we center on the extracellular environments connecting them — interrogating these fluids to gain mechanistic insight into the communication networks that drive physiological processes and go awry in disease.
Most mechanics will tell you: check the fluids first. We took that advice seriously.

AUGUST 2026

MARCH 2026

MARCH 2026

MARCH 2026

DATE

JUNE 2025

Principal Investigator
Biography
Graduate (PhD) Research Assistant, Louisiana State University

Graduate (PhD) Research Assistant, Louisiana State University
Alumni
Former members of the laboratory
Reproduction & Fertility · Research Article
FASEB Journal · Research Article
Biology of Reproduction · Research Article
Biology of Reproduction · Research Article
Biology of Reproduction · Research Article
Cell Reports · Research Article
Nature Communications · Research Article
STAR Protocols · Methods Article
Cell Reports · Research Article
Communications Biology · Research Article
Proceedings of the National Academy of Sciences · Research Article
Biology of Reproduction · Research Article
Biology of Reproduction · Research Article
Reproduction · Research Article
Biology of Reproduction · Research Article
Get in touch
GET IN TOUCH
Constantine A. Simintiras
Lab 162 | Office 174 Veterinary Medical Research Building
588 Raymond Stotzer Pkwy
College Station, TX 77845-4458
simintiras[at]tamu.edu