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275) In conclusion, the addition of activin-A to culture medium stimulated early antrum formation as well as an increase in the daily follicular growth rate and the percentage of meiosis resumption.
* Activin-A promotes the development of goat isolated secondary follicles in vitro.
- The role of activin-A in follicular development and on the mRNA expression levels of different genes in goat secondary follicles was evaluated. Goat secondary follicles (≥ 150 μm) were cultured for 18 days under control conditions or with the addition of either 50 or 100 ng/ml activin-A (Experiment 1). The mRNA levels for the genes that code for activin-A, ActR-IA, ActR-IB, ActR-IIA, ActR-IIB, follicle stimulating hormone receptor (FSH-R) and P450 aromatase were measured in each condition (Experiment 2). We observed that after 6 days of culture, the antrum formation rate was higher in cultures with added activin-A than in the cultured control (P < 0.05). The addition of 50 ng/ml activin-A increased the follicular growth rate in the final third of the culture (days 12-18), resulting in a higher percentage of meiosis resumption (P < 0.05). On day 6, the addition of activin-A (50 ng/ml) increased the levels of ActR-IA mRNA compared with the cultured control (P < 0.05). After 18 days, the addition of 50 ng/ml activin-A significantly increased the levels of its own mRNA compared with the non-cultured control. Moreover, this treatment reduced the mRNA levels of P450 aromatase in comparison with the cultured control (P < 0.05). Higher levels of P450 aromatase mRNA were found for both activin-A treatments compared with the non-cultured control (P < 0.05). No difference in estradiol levels was detected among any of the tested treatments. In conclusion, the addition of activin-A to culture medium stimulated early antrum formation as well as an increase in the daily follicular growth rate and the percentage of meiosis resumption.
=>茂み, 成長, 増加, 発展, 栽培, 腫よう, 成長物
Overview of noun growth
The noun growth has 7 senses (first 5 from tagged texts)
1. (37) growth, growing, maturation, development, ontogeny, ontogenesis -- ((biology) the process of
an individual organism growing organically; a purely biological unfolding of events involved in an
organism changing gradually from a simple to a more complex level; "he proposed an indicator of
osseous development in children")
2. (20) growth -- (a progression from simpler to more complex forms; "the growth of culture")
3. (3) increase, increment, growth -- (a process of becoming larger or longer or more numerous or
more important; "the increase in unemployment"; "the growth of population")
4. (3) growth -- (vegetation that has grown; "a growth of trees"; "the only growth was some salt
grass")
5. (1) emergence, outgrowth, growth -- (the gradual beginning or coming forth; "figurines presage
the emergence of sculpture in Greece")
6. growth -- ((pathology) an abnormal proliferation of tissue (as in a tumor))
7. growth -- (something grown or growing; "a growth of hair")
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