piRNAs guide PIWI proteins to silence transposons in animal germ cells. In Drosophila, the heterochromatic piRNA clusters transcribe piRNA precursors to be transported into nuage, a perinuclear structure for piRNA production and transposon silencing. At nuage, reciprocal cycles of piRNA-directed RNA cleavage—catalyzed by the PIWI proteins Aubergine (Aub) and Argonaute3 (Ago3) in Drosophila—dest...

Background: Abnormal uterine bleeding (AUB) is one of the most common clinical problems in gynecology. Transvaginal sonography (TVS) and hysteroscopy are two diagnostic methods for patients with AUB. For most of the patients with AUB, diagnostic hysteroscopy can be done in clinic with minimal discomfort and much lower expense than operative room. Materials and Methods: In our clinical trial stu...

OBSTETRICS & GYNECOLOGY Background Definition and Nomenclature Abnormal uterine bleeding associated with ovulatory dysfunction (AUB-O) (ie, oligo-ovulation or anovulation) is a spectrum of disorders most commonly associated with heavy, irregular uterine bleeding. Abnormal uterine bleeding (AUB) occurs in the setting of ovulatory dysfunction because of the effects of chronic unopposed estrogen o...

BACKGROUND Exposure to airborne particulate matter (PM), a major component of air pollution, has been associated with increases in both exacerbations of and hospitalizations for asthma. We have previously shown that exposure to ambient PM collected in urban Baltimore (AUB) induces airway hyperresponsiveness (AHR), eosinophilic and neutrophilic inflammation, and the recruitment of T cells. Howev...

Transposons and other selfish DNA elements can be found in all phyla, and mobilization of these elements can compromise genome integrity. The piRNA (PIWI-interacting RNA) pathway silences transposons in the germline, but it is unclear if this pathway has additional functions during development. Here we show that mutations in the Drosophila piRNA pathway genes, armi, aub, ago3, and rhi, lead to ...

Piwi proteins such as Drosophila Aubergine (Aub) and mouse Miwi are essential for germline development and for primordial germ cell (PGC) specification. They bind piRNAs and contain symmetrically dimethylated arginines (sDMAs), catalyzed by dPRMT5. PGC specification in Drosophila requires maternal inheritance of cytoplasmic factors, including Aub, dPRMT5, and Tudor (Tud), that are concentrated ...

STUDY OBJECTIVE To compare hysterectomy with less-invasive alternatives for abnormal uterine bleeding (AUB) in 7 clinically important domains. DESIGN Systematic review. SETTING Randomized clinical trials comparing bleeding, quality of life, pain, sexual health, satisfaction, need for subsequent surgery, and adverse events between hysterectomy and less-invasive treatment options. PATIENTS ...

BACKGROUND: Abnormal uterine bleeding (AUB) is a common problem that affects one in five women during the pre-menopausal years. It is frequently managed by family physicians, especially in northern, rural and isolated areas where severe shortages of gynecologists exist. METHODS: We surveyed 194 family physicians in northern, rural and isolated areas of Ontario, Canada to determine their educati...

BACKGROUND AUB is a common cause of women's referring to gynecologists. Although hysteroscopy is known as the gold standard technique for diagnosing the cause of AUB, sonohysterography is less invasive, and it is performed by general gynecologists. The purpose of this study was to evaluate the diagnostic performance of sonohysterography compared to the results of the endometrial biopsy, guided ...