Juan C. Irwin

Abstract The uterine lining (endometrium) exhibits a pro-inflammatory phenotype in women with endometriosis, resulting in pain, infertility, and poor pregnancy outcomes. The full complement of cell types contributing to this phenotype has y…

Progestins are widely used for the treatment of gynecologic disorders and alone, or combined with an estrogen, are used as contraceptives. While their potencies, efficacies and side effects vary due to differences in structures, doses and r…

PURPOSE: The study aims to test the hypothesis that platelet-rich plasma (PRP) stimulates cellular processes involved in endometrial regeneration relevant to clinical management of poor endometrial growth or intrauterine scarring. METHODS:…

Uterine fibroids are a common finding in infertility patients. Impaired implantation and decidualization have been proposed to contribute to compromised fertility. Data are limited on the endometrial transcriptome from subjects with uterine…

Human endometrium undergoes extensive regeneration on a cyclic basis in premenopausal women and likely occurs through the contribution of stem/progenitor cells. Menopause results in the permanent cessation of menstrual cycles and is precede…

Endometriosis is an estrogen-dependent, progesterone-resistant disorder largely derived from retrograde transplantation of menstrual tissue/cells into the pelvis, eliciting an inflammatory response, pelvic pain, and infertility. Eutopic end…

OBJECTIVE: To develop a protocol for cryopreservation and recovery of human endometrial epithelial cells (eECs) retaining molecular and functional characteristics of endometrial epithelium in vivo. DESIGN: In vitro study using human endome…

Human endometrium undergoes cyclic regeneration involving stem/progenitor cells, but the role of resident endometrial mesenchymal stem cells (eMSC) as progenitors of endometrial stromal fibroblasts (eSF) has not been definitively demonstrat…

SYSTEMIC AND FOLLICULAR OXIDATIVE STRESS IN INFERTILE WOMEN WITH ENDOMETRIOSIS UNDERGOING CONTROLLED OVARIAN STIMULATION FOR ICSI: IS THERE A ROLE IN THE ETIOPATHOGENESIS OF INFERTILITY? M. G. Da Broi, F. O. Albuquerque, A. Z. de Andrade, R…

Human endometrium undergoes major gene expression changes, resulting in altered cellular functions in response to cyclic variations in circulating estradiol and progesterone, largely mediated by transcription factors and nuclear receptors. …

Purpose Decidualization comprises specific biochemical and morphological changes in uterine endometrium essential for establishment of pregnancy. This process is abnormal in women with endometriosis, a disorder in which endometrial-like tis…

Endometriosis (E), an estrogen-dependent, progesterone-resistant, inflammatory disorder, affects 10% of reproductive-age women. It is diagnosed and staged at surgery, resulting in an 11-year latency from symptom onset to diagnosis, undersco…

OBJECTIVE: To determine the effects of coculturing endometrial epithelial cells (eEC) with paired endometrial stromal fibroblasts (eSF) on cell-specific gene expression and cytokine secretion patterns. DESIGN: In vitro study. SETTING: Uni…

While chronic pain is a main symptom in endometriosis, the underlying mechanisms and effective therapy remain elusive. We developed an animal model enabling the exploration of ectopic endometrium as a source of endometriosis pain. Rats were…

Human endometrium regenerates on a cyclic basis from candidate stem/progenitors whose genetic programs are yet to be determined. A subpopulation of endometrial stromal cells, displaying key properties of mesenchymal stem cells (MSCs), has b…

OBJECTIVE: To develop a standard operating procedure (SOP) for collection, transport, storage of human endometrial tissue and blood samples, subject and specimen annotation, and establishing sample priorities. DESIGN: The SOP synthesizes s…

Human endometrium, a steroid hormone-dependent tissue, displays complex cellular regulation mediated by nuclear receptors (NRs). The NRs interact with histone-modifying and DNA-methylating/-demethylating enzymes in the transcriptional compl…

The human female reproductive tract shows unique cycle-specific changes in vascularization. Vascular endothelial growth factor (VEGF) is a specific vascular endothelial mitogen which is produced by human endometrium and is known to be regul…

Growth factors are believed to act as local regulators of endometrial cyclic activity, but there is limited information on their regulation of decidual differentiation and function. Cell cultures of human endometrial stroma treated with pro…

Peritoneal fluid (PF) lines the abdomen and pelvis and is believed to contain growth factors that stimulate endometriosis, a benign gynecological condition associated with pelvic pain and infertility, in which endometrial cells proliferate …