keyword
MENU ▼
Read by QxMD icon Read
search

Progestin

keyword
https://www.readbyqxmd.com/read/28328298/the-synthetic-progestin-gestodene-affects-functional-biomarkers-in-neonatal-rat-osteoblasts-through-an-estrogen-receptor-related-mechanism-of-action
#1
Juana Enríquez, Gustavo García, Bertha Herrero, Fernando Larrea
BACKGROUND: Clinical studies have shown that gestodene (GDN), a potent third-generation synthetic progestin, affects bone resorption. However, its mode of action in bone cells is not fully understood. The aim of this study was to establish whether GDN affects bone directly or through its bioconversion to other metabolites with different biological activities. METHODS: In this study, we investigated the effects of GDN and its A-ring reduced metabolites on proliferation, differentiation, and mineralization of calvarial osteoblasts isolated from neonatal rat and their capacity to displace [(3)H]-E2 at ER binding sites...
March 22, 2017: Endocrine Research
https://www.readbyqxmd.com/read/28320297/selection-of-progesterone-derivatives-specific-to-membrane-progesterone-receptors
#2
A V Polikarpova, A A Maslakova, I S Levina, L E Kulikova, Y V Kuznetsov, A A Guseva, T A Shchelkunova, I V Zavarzin, O V Smirnova
The search of selective agonists and antagonists of membrane progesterone receptors (mPRs) is a starting point for the study of progesterone signal transduction mechanisms mediated by mPRs, distinct from nuclear receptors. According to preliminary data, the ligand affinity for mPRs differs significantly from that for classical nuclear progesterone receptors (nPRs), which might indicate structural differences in the ligand-binding pocket of these proteins. In the present work, we analyzed the affinity of several progesterone derivatives for mPRs of human pancreatic adenocarcinoma BxPC3 cell line that is characterized by a high level of mPR mRNA expression and by the absence of expression of nPR mRNA...
February 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28314704/over-the-counter-access-to-oral-contraceptives-for-adolescents
#3
REVIEW
Krishna K Upadhya, John S Santelli, Tina R Raine-Bennett, Melissa J Kottke, Daniel Grossman
Oral contraceptives (OCs) are used by millions of women in the U.S. The requirement to obtain OCs by prescription from a clinician may serve as a barrier to contraceptive initiation and continuation for women, in particular adolescents. Over-the-counter (OTC) availability would reduce this barrier and could further reduce unintended pregnancy rates. This review explores the scientific issues and regulatory processes involved in switching OCs to OTC status for minor adolescents. We review: (1) the regulatory criteria for switching a drug to OTC status; (2) risk of pregnancy and safety during use of OCs including combined oral contraceptives and progestin-only pills for adolescents; (3) the ability of adolescents to use OCs consistently and correctly; (4) OTC access to OCs and potential effect on sexual risk behaviors; and (5) the potential for reduced opportunities for clinicians to counsel and provide recommended reproductive health care to adolescents...
March 6, 2017: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/28300711/dramatic-shrinkage-with-reduced-vascularization-of-large-meningiomas-after-cessation-of-progestin-treatment
#4
Michel Kalamarides, Matthieu Peyre
BACKGROUND: The relationship between long-term intake of progestin and meningioma growth is now well-known and has become a model of hormone-driven meningioma growth. Conversely, it has been demonstrated that cessation of treatment often leads to tumor regression. Consequently, watchful observation has become the strategy of choice in the case of multiple meningiomas in asymptomatic patients undergoing progestin treatment. CASE DESCRIPTION: In two patients with large tumors (>60 cm(3)) scheduled for surgery, conservative management with cessation of progestin treatment gave a dramatic reduction of meningioma size from 64 to 11 cm(3) (-83%) and 68 to 13 cm(3) (-81%), respectively, over a one year period...
March 11, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28292452/sometimes-you-do-get-a-second-chance-emergency-contraception-for-adolescents
#5
REVIEW
Ellen S Rome, Veronica Issac
Unplanned or unintended pregnancy remains a significant challenge for adolescents; many teens who plan ahead but opt not to choose long-acting reversible contraceptive methods have high failure rates with condom usage, oral contraceptives, and other less long-acting methods. Emergency contraception (EC) remains a necessity for those adolescents seeking a second chance to prevent the unintended consequences of unplanned sexual activity. At present, 5 postcoital methods remain available as EC globally: intrauterine devices, ulipristal acetate, a selective progesterone modulator, mifepristone; levonorgestrel, and ethinyl estradiol plus levonorgestrel or norgestrel (rarely used now that progestin only methods are more readily available)...
April 2017: Pediatric Clinics of North America
https://www.readbyqxmd.com/read/28292450/choosing-the-right-oral-contraceptive-pill-for-teens
#6
REVIEW
Anne Powell
Oral contraceptive pills (OCPs) continue to be the most commonly used form of prescription contraceptives used by adolescents in the United States. With proper use, oral contraceptives provide safe and effective birth control. Broad categories of OCPs include progestin-only pills (POPs) and combined oral contraceptive pills (COCs). Certain types of progestins have more potent antiandrogenic properties and are more effective in treating acne, hirsutism, and polycystic ovary syndrome. This article reviews types of OCPs, discusses risks and benefits of OCPs, and provides guidance for how to choose the most beneficial and appropriate OCP for individual adolescent patients...
April 2017: Pediatric Clinics of North America
https://www.readbyqxmd.com/read/28290016/a-prospective-cohort-study-of-oral-contraceptive-use-and-ovarian-cancer-among-women-in-the-united-states-born-from-1947-to-1964
#7
Amy L Shafrir, Helena Schock, Elizabeth M Poole, Kathryn L Terry, Rulla M Tamimi, Susan E Hankinson, Bernard A Rosner, Shelley S Tworoger
PURPOSE: Oral contraceptives (OCs) have been consistently associated with a reduced ovarian cancer risk; however, most previous studies included women in older birth cohorts using high-dose OC formulations. We assessed OC use, including type and dose, and ovarian cancer risk among women born between 1947 and 1964 using more recent formulations. METHODS: We included 110,929 Nurses' Health Study II participants. Women reported duration of OC use and brands used from age 13 to baseline (1989) and every 2 years thereafter through 2009...
March 13, 2017: Cancer Causes & Control: CCC
https://www.readbyqxmd.com/read/28285153/contraceptive-method-and-self-reported-hiv-status-among-women-in-malawi
#8
Jamie E Luster, Abigail Norris Turner, Duna Alkhalaileh, Maria F Gallo
OBJECTIVES: We aimed to describe contraceptive methods used by women in Malawi and determine whether contraceptive use differed by self-reported HIV status. Effective contraception is a primary method of preventing mother-to-child transmission of HIV. STUDY DESIGN: Analysis is based on 12,658 nonpregnant, sexually debuted women ages 15-49 years in the 2010 Malawi Demographic and Health Survey. Analysis was restricted to respondents with contraceptive need (i.e., fecund and did not want a child in the next 12 months) who reported their last HIV test result...
March 8, 2017: Contraception
https://www.readbyqxmd.com/read/28281022/estrogen-progestin-use-and-breast-cancer-characteristics-in-lean-and-overweight-postmenopausal-women
#9
Olof J Kjartansdottir, Lara G Sigurdardottir, Elinborg J Olafsdottir, Jon G Jonasson, Giske Ursin, Laufey Tryggvadottir
PURPOSE: Breast cancer associated with estrogen-progestin (EP) therapy may have more favorable characteristics than cancer in never users, but results are conflicting. It is not well known either whether Body Mass Index (BMI) modifies this association. We investigated breast cancer characteristics in EP users for lean (BMI < 25 kg/m(2)) and overweight women (BMI ≥ 25 kg/m(2)). METHODS: The Icelandic Cancer Detection Clinic cohort, with information on breast cancer risk factors for 90% of Icelandic women, was linked with the population-based Icelandic Cancer Registry...
March 9, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28276192/the-pregnancy-outcome-of-progesterone-primed-ovarian-stimulation-using-medroxyprogesterone-acetate4mg-versus-10mg-daily-in-infertile-women-undergoing-in-vitro-fertilization-a-randomized-controlled-trial
#10
J Dong, Y Wang, W R Chai, Q Q Hong, N L Wang, L H Sun, H Long, L Wang, H Tian, Q F Lyu, X F Lu, Q J Chen, Y P Kuang
OBJECTIVE: To investigate the clinical outcome and endocrinological characteristics of progestin-primed ovarian stimulation (PPOS) using medroxyprogesterone acetate (MPA) 4mg versus 10mg daily in infertile women with normal ovary reserve. DESIGN: A randomized parallel controlled trial. SETTING: Tertiary-care academic medical center. PARTICIPANTS: 300 infertile women undergoing IVF/ICSI treatment. METHODS: HMG 225IU/d and MPA (group A: 10mg/d; group B: 4mg/d) were started simultaneously from cycle day 3 onwards...
March 9, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28275459/carbohydrate-lipid-bone-and-inflammatory-markers-in-hiv-positive-adolescents-on-antiretroviral-therapy-and-hormonal-contraception
#11
EDITORIAL
Nadia Kancheva Landolt, Torsak Bunupuradah, Jullapong Achalapong, Pope Kosalaraksa, Witaya Petdachai, Chaiwat Ngampiyaskul, Sasiwimol Ubolyam, Narukjaporn Thammajaruk, Stephen Kerr, Jintanat Ananworanich
BACKGROUND: Little is known about the cumulative effect of HIV antiretroviral therapy (ART) and hormonal contraception (HC) on metabolism and inflammation in HIV-positive women. METHODS: We conducted a cross-sectional assessment of markers for carbohydrate, lipid, bone metabolism, inflammation and coagulation in HIV-positive adolescents on ART and HC (n=37) versus on ART only (n=51) in Thailand. The Wilcoxon rank-sum test was used to assess differences between groups...
January 1, 2017: Journal of Virus Eradication
https://www.readbyqxmd.com/read/28259256/introduction-a-focus-on-the-medical-management-of-endometriosis
#12
Robert F Casper
In this views and reviews series of articles, we focus on the long-term medical management of endometriosis in lieu of surgery. The development of noninvasive biomarkers will facilitate the early diagnosis of endometriosis and early medical management. We discuss the use of oral progestin-only as first line treatment in place of oral contraceptives. Future medical treatments may be curative rather than simply suppressive or palliative. The section on surgery mainly pertains to failed medical management or specific types of endometriosis which require surgical excision...
March 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28251642/the-endometrial-and-breast-safety-of-menopausal-hormone-therapy-containing-micronised-progesterone-a-short-review
#13
REVIEW
John Eden
For a significant minority of women, menopausal symptoms can be very unpleasant; however, many are worried about taking menopausal hormone therapy (MHT) for fear of causing breast cancer. Micronised progesterone (mP4) has been available in Europe since the 1990s and clinical trials have shown that 100 mg oral daily, 200 mg oral sequentially or 100 mg vaginal every second day effectively protect the endometrium from the stimulatory effects of oestrogen. MHT containing mP4 has a significantly lower breast cancer risk than those containing progestins...
February 2017: Australian & New Zealand Journal of Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/28239035/characterization-of-membrane-progestin-receptor-%C3%AE-mpr%C3%AE-of-the-medaka-and-role-in-the-induction-of-oocyte-maturation
#14
Shimi Rani Roy, Jun Wang, Md Rubel Rana, Mikiko Nakashima, Toshinobu Tokumoto
Oocyte maturation in medaka is induced by the maturation-inducing hormone (MIH) via its membrane receptor. The most likely candidates for the membrane receptor are membrane progestin receptors (mPRs). In order to characterize the mPRα subtype of medaka, a human cell line expressing the mPRα gene of medaka was established and its steroid binding property was assessed. The α subtype exhibited high binding affinity for 17,20β-DHP, the MIH in medaka. Treatment with a morpholino antisense oligonucleotide to mPRα blocked oocyte maturation in vivo...
2017: Biomedical Research
https://www.readbyqxmd.com/read/28238590/the-current-status-of-hormonal-therapies-for-heavy-menstrual-bleeding
#15
REVIEW
Oskari Heikinheimo, Ian Fraser
Hormonal treatment of abnormal uterine bleeding (AUB), especially bleeding related to endometrial causes (AUB-E), ovulatory dysfunction (AUB-O) and coagulopathy (AUB-C), and to some extent, uterine leiomyomas and adenomyosis, has become the first-line evidence-based management strategy during recent years. Hormonal treatment of heavy menstrual bleeding (HMB) is also endorsed as the first line of treatment in several international guidelines. In the present article, we review the efficacy of the commonly used and widely available hormonal treatments of AUB-O, AUB-E and AUB-C...
January 21, 2017: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/28238536/high-salt-intake-does-not-aggravate-glucose-dysregulation-and-dyslipidemia-induced-by-estrogen-progestin-oral-contraceptive
#16
Oluwaseun A Adeyanju, Taofeek O Usman, Aboyeji L Oyewole, Sikiru A Biliaminu, Lawrence A Olatunji
BACKGROUND: Estrogen-progestogen combined oral contraceptive (OC) use has been associated with increased cardiometabolic risk factors, including glucose dysregulation, dyslipidemia, hypertension, and pro-inflammatory state. However, the effect of a high-salt diet on these risk factors during OC use is not yet investigated. We therefore hypothesized that a high-salt diet would increase cardiometabolic risk factors in female rats treated with a combination of OC steroids, levonorgestrel (L) and ethinylestradiol (EE), and that elevated plasma levels of pro-inflammatory markers are associated with the cardiometabolic effects...
February 10, 2017: Pathophysiology: the Official Journal of the International Society for Pathophysiology
https://www.readbyqxmd.com/read/28237341/onset-of-luteolytic-action-of-exogenous-prostaglandinf-2%C3%AE-during-estrous-cycle-in-goats
#17
Juan E Romano, Abdalhamid Alkar, Marcel Amstalden
The objectives of these two experiments were to determine the day of onset of luteolysis after exogenous PGF-2α administration during the estrous cycle and the fertility of this synchronized estrus in goats. In the first experiment, during the breeding season, 48 Nubian does were estrous synchronized, using intravaginal sponges impregnated with a progestin, and estrus was detected by vasectomized bucks. The does were divided at random into three groups of 16 does each to be treated at days 2, 3, and 4 of the estrous cycle (estrus = day 0)...
April 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28235592/steroid-profiling-in-h295r-cells-to-identify-chemicals-potentially-disrupting-the-production-of-adrenal-steroids
#18
Petra Strajhar, David Tonoli, Fabienne Jeanneret, Raphaella M Imhof, Vanessa Malagnino, Melanie Patt, Denise V Kratschmar, Julien Boccard, Serge Rudaz, Alex Odermatt
The validated OECD test guideline 456 based on human adrenal H295R cells promotes measurement of testosterone and estradiol production as read-out to identify potential endocrine disrupting chemicals. This study aimed to establish optimal conditions for using H295R cells to detect chemicals interfering with the production of key adrenal steroids. H295R cells' supernatants were characterized by liquid chromatography-mass spectrometry (LC-MS)-based steroid profiling, and the influence of experimental conditions including time and serum content was assessed...
April 15, 2017: Toxicology
https://www.readbyqxmd.com/read/28225430/association-between-osteoporosis-treatment-and-severe-periodontitis-in-postmenopausal-women
#19
Johelle de S Passos-Soares, Maria Isabel P Vianna, Isaac S Gomes-Filho, Simone S Cruz, Maurício L Barreto, Luis F Adan, Cassiano K Rösing, Soraya C Trindade, Eneida M M Cerqueira, Frank A Scannapieco
OBJECTIVE: To estimate the association between osteoporosis treatment and severe periodontitis in postmenopausal women. METHODS: This cross-sectional study comprised of 492 postmenopausal women, 113 women in osteoporosis treatment, and 379 not treated. Osteoporosis treatment consisted of systemic estrogen alone, or estrogen plus progestin, and calcium and vitamin D supplements, for at least 6 months. Severe periodontitis was defined as at least two interproximal tooth sites with clinical attachment loss of at least 6 mm, and at least one interproximal site with probing depth of at least 5 mm; and dental caries experience was measured using the decayed, missing, and filled teeth (DMFT) index...
February 20, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28219785/transcriptional-alterations-induced-by-binary-mixtures-of-ethinylestradiol-and-norgestrel-during-the-early-development-of-zebrafish-danio-rerio
#20
Yan-Qiu Liang, Guo-Yong Huang, Jian-Liang Zhao, Wen-Jun Shi, Li-Xin Hu, Fei Tian, Shuang-Shuang Liu, Yu-Xia Jiang, Guang-Guo Ying
Synthetic estrogens and progestins are commonly used in human and veterinary medicine. After use, they reach aquatic environments via discharge of wastewaters from human and animals, thus posing potential risks to organisms. So far, very little is known about their combined effects in aquatic organisms. The aim of this study was to investigate the effects of binary mixtures of ethinylestradiol (EE2) and norgestrel (NGT) on embryonic zebrafish (Danio rerio) by measuring transcriptional alterations. Zebrafish embryos were exposed to EE2 and NGT alone or in combination at concentrations between 36 and 5513ngL(-1) for 96h post-fertilization (hpf)...
February 17, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
keyword
keyword
27346
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"