Reading
between
the lines.

About the laboratory

Philosophy.

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.

News.

Society for the Study of Reproduction podcast graphic with an egg and sperm cells

MARCH 2026

Society for the Study of Reproduction (SSR) podcast interview

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USDA logo

MARCH 2026

United States Department of Agriculture funding award

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Biology of Reproduction BOR logo

DATE

Biology of Reproduction top reviewer recognition

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Team.

Constantine "Kosta" Simintiras headshot

Constantine "Kosta" Simintiras

Principal Investigator

Biography
Iebu Devkota headshot

Iebu Devkota

Graduate (PhD) Research Assistant, Louisiana State University

Zach Bonomo headshot

Zach Bonomo

Graduate (PhD) Research Assistant, Louisiana State University

Alumni

Former members of the laboratory

Dailin FuegoMS Animal Sciences, Louisiana State University
Elizabeth MolengraftBS Animal Sciences, Louisiana State University
Gabriella WilliamsBS Animal Sciences, Louisiana State University
Caroline CucciaBS Animal Sciences, Louisiana State University
Lilian BruserBS Animal Sciences, Louisiana State University
Sophie LeBlancBS Animal Sciences, Louisiana State University
Maya AjodhaBS Animal Sciences, Louisiana State University

Select publications.

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Get in touch

Contact.

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