scholarly journals Erratum: Localization and temporal regulation of tissue inhibitors of metalloproteinases 3 and 4 in bovine preovulatory follicles

Reproduction ◽  
2004 ◽  
Vol 128 (6) ◽  
pp. 863
Author(s):  
Qinglei Li ◽  
Leanne J Bakke ◽  
J Richard Pursley ◽  
George W Smith
Reproduction ◽  
2004 ◽  
Vol 128 (5) ◽  
pp. 555-564 ◽  
Author(s):  
Qinglei Li ◽  
Leanne J Bakke ◽  
J Richard Pursley ◽  
George W Smith

The matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) are potential regulators of the focalized extracellular matrix degradation required for ovulation. The objectives of the present study were to determine localization and temporal regulation of TIMP-3 and TIMP-4 mRNA and protein in bovine preovulatory follicles. Ovaries containing preovulatory follicles were collected at 0, 12 and 20 h after GnRH injection for real-time PCR quantification of TIMP-3 and TIMP-4 mRNAs and immunohistochemical localization studies. Additional samples collected at 0, 6, 12, 18 and 24 h post GnRH injection were subjected to Western analysis to determine temporal changes in TIMP-3 and TIMP-4 proteins in the apex and base of preovulatory follicles. Results indicate the gonadotropin surge regulates TIMP-3 and TIMP-4 expression. TIMP-3 and TIMP-4 mRNAs increased within 12 h after GnRH injection. TIMP-3 protein was localized to granulosal and thecal layers of preovulatory follicles and adjacent ovarian stroma, whereas TIMP-4 immunoreactivity was localized to granulosal and thecal cells and ovarian blood vessels. Amounts of TIMP-3 and TIMP-4 proteins in the follicular apex peaked within 12 h post GnRH injection and subsequently declined by 24 h. However, amounts of TIMP-3 and TIMP-4 proteins in the base were not elevated after GnRH administration. Results demonstrate that mRNA and protein for both TIMP-3 and TIMP-4 are increased in bovine preovulatory follicles following the gonadotropin surge. Coordinate expression of TIMPs and MMPs may help regulate the extracellular matrix remodeling characteristic of the ovulatory process.


Reproduction ◽  
2006 ◽  
Vol 131 (6) ◽  
pp. 1099-1107
Author(s):  
Shumin Bu ◽  
Chenfu Cao ◽  
Yongjun Yang ◽  
Chenglin Miao ◽  
Zeng Hu ◽  
...  

Tissue inhibitors of metalloproteinases (TIMPs) are potential regulators of tissue remodeling in the ovary. The aim of the present study was to examine the localization and temporal regulation of TIMP-4 protein in the mouse ovary. An induced superovulation model (eCG/hCG) was employed in immature mice to evaluate TIMP-4 protein expression profiles in ovaries collected during the follicular phase, the pre ovulatory period, and the luteal lifespan. Immunofluorescence results indicated that TIMP-4 protein was localized to theca of both antral and preovulatory follicles and adjacent ovarian stroma. After the initiation of luteinization with hCG, TIMP-4 was observed within the luteinizing granulosa cells and persisted throughout the lifespan of the corpus luteum. In the cycling ovary, TIMP-4 signaling localized to corpus luteum from previous estrous cycles, the theca of preovulatory follicles, and appeared to be lower in newly forming corpus luteum. Western analysis further showed that the levels of TIMP-4 increased significantly during the luteinization process of granulosa cells, but no significant change was found among all corpus luteum stages. A putative regulatory mechanism of TIMP-4 expression was identified utilizing an in vitro model. Treatment of cultured granulosa cells with hCG significantly augmented TIMP-4 protein expression levels. Together our data indicate that the luteinization process of granulosa cells is associated with up-regulation of TIMP-4 and that TIMP-4 might play an essential role in maintenance of the luteal function during the whole lifespan of corpus luteum.


Author(s):  
Е.В. Маркелова ◽  
О.В. Овчинникова ◽  
А.С. Хохлова ◽  
Л.П. Догадова ◽  
А.В. Костюшко ◽  
...  

Оперативное вмешательство - один из основных методов лечения глаукомы. Однако развитие избыточного рубцевания созданных путей оттока определяет результат хирургического лечения в отдаленные сроки. Процессы рубцевания на данный момент недостаточно изучены. Цель исследования - оценка роли матриксной металлопротеиназы-9, ее ингибиторов в процессах рубцевания у больных с первичной открытоугольной глаукомой после оперативного лечения. Методика. Для выявления возможных маркеров избыточного рубцевания методом твердофазного иммуноферментного анализа определяли содержание матриксных металлопротеиназ-9, тканевых ингибиторов металлопротеиназ 2 и -3 в слезной жидкости у 37 пациентов с активной стадией первичной остроугольной глаукомы в динамике послеоперационного периода. Средний возраст пациентов составил 52,8 лет. В зависимости от исхода оперативного вмешательства все пациенты были разделены на 2 группы - с благоприятным исходом (без избыточного рубцевания) и с неблагоприятным исходом (с избыточным рубцеванием) на месте сформированных дополнительных путей оттока внутриглазной жидкости в послеоперационном периоде. Группа контроля включала 20 человек в возрасте от 50 до 66 лет без сопутствующей офтальмологической и соматической патологии в стадии обострения. Результаты. В динамике показано изменение концентрации матриксной металлопротеиназы-9 и ее ингибиторов в послеоперационном периоде. Анализ данных свидетельствует об обратной зависимости уровня матриксной металлопротеиназы-9 и тканевых ингибиторов металлопротеиназы 2 и 3 типов с исходом операции - чем выше концентрация металлопротеиназы-9 и ниже концентрация тканевых ингибиторов металлопротеиназ 2, -3 в слезной жидкости, тем выше вероятность неблагоприятного исхода в виде рубцевания сформированных дополнительных путей оттока внутриглазной жидкости в послеоперационном периоде. Заключение. Мониторинг уровня металлопротеиназ и их тканевых ингибиторов после проведения хирургического лечения пациентов с первичной открытоугольной глаукомой позволяет прогнозировать раннее рубцевание, дает возможность разработки новых методов лечения как в раннем, так и в позднем послеоперационном периоде. Surgery is one of the major treatments for glaucoma; however excessive scarring of created outflow patways affects the long-term outcome. At the present time, scarring processes are not sufficiently studied. Aim. To evaluate the role of matrix metalloproteinase 9 and its inhibitors in scarring after surgical treatment of open-angle glaucoma. Methods. Concentrations of matrix metalloproteinase 9 and tissue inhibitors of metalloproteinases 2 and 3 were measured in tear fluid of 37 patients (mean age, 52.8) with active primary open-angle glaucoma in dynamics during the postoperative period to identify possible markers of excessive scarring. Based on the surgery outcome, all patients were divided into two groups, with a favorable outcome (without excessive scarring) and an unfavorable outcome (with excessive scarring) in the created additional outflow pathways for the intraocular fluid in the postoperative period. The control group included 20 subjects aged 50-66 without eye disease or somatic disease at exacerbation stage. Results. Analysis of changes in concentrations of matrix metalloproteinase 9 and its inhibitors in the postoperative period showed their inverse relationship with the surgery outcome. The higher was the metalloproteinase 9 level and the lower the level of tissue inhibitors of metalloproteinases 2 and 3 the higher was the probability of unfavorable outcome evident as excessive scarring of the formed additional pathways for tear fluid outflow in the postoperative period. Conclusion. Postoperative monitoring of metalloproteinases and their tissue inhibitors allows to predict early scarring and to develop new treatments both in early and late postoperative periods.


ASAIO Journal ◽  
2012 ◽  
Vol 58 (3) ◽  
pp. 204-211 ◽  
Author(s):  
Ralf Guenzinger ◽  
Harald Lahm ◽  
Michael Wottke ◽  
Ruediger Lange

2018 ◽  
Vol 275 (12) ◽  
pp. 3075-3082 ◽  
Author(s):  
Valéria Souza Freitas ◽  
Jean Nunes dos Santos ◽  
Pedro Paulo de Andrade Santos ◽  
Cassiano Francisco Weege Nonaka ◽  
Leão Pereira Pinto ◽  
...  

2018 ◽  
Vol 10 (4) ◽  
pp. 306-311 ◽  
Author(s):  
Jian-feng Zhang ◽  
Gang-liang Wang ◽  
Zhi-jie Zhou ◽  
Xiang-qian Fang ◽  
Shuai Chen ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document