MORPHOMETRIC ANALYSIS OF CELL-TYPES IN THE OVINE CORPUS-LUTEUM THROUGHOUT THE ESTROUS-CYCLE

MORPHOMETRIC ANALYSIS OF CELL-TYPES IN THE OVINE CORPUS-LUTEUM THROUGHOUT THE ESTROUS-CYCLE
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DOI:
10.1095/biolreprod35.5.1299
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发表时间:
1986-12-01
影响因子:
3.6
通讯作者:
NISWENDER, GD
NISWENDER, GD
中科院分区:
生物学2区
文献类型:
--
作者:
FARIN, CE;MOELLER, CL;NISWENDER, GD

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通过形态计量学分析测定了发情周期早期(第4天)、中期(第8天和第12天)和晚期(第16天)绵羊黄体的细胞组成。通过腹中部剖腹术从总共19只母羊中收集个体黄体。每个黄体的中心切片进行电子显微镜检查,随后进行类固醇和非类固醇细胞的数量和大小的形态测定分析。在整个动情周期中,黄体重量逐渐增加(p < 0.05)。根据大体外观和重量,将第16天采集的黄体分配至两个亚组之一:非退化(NR,542 ± 0.001)。25 mg)或消退(R,260 . ±. 2mg)。小黄体细胞所占的黄体比例无明显变化(19 . ±. 2%)或大黄体细胞(36 . ±. 1%的大鼠发情周期延长。每个黄体的类固醇生成细胞总数从21.8 . ±. 3.7(. times. 106)第4天至61.7 .+-。5.4(. times. 106)在第8天(p < 0.05),并且此后保持升高。小黄体细胞的数量为10.0 ±。2.7(. times. 106),39.7 .+-. 1.4(. times. 106),46.1 .+-. 5.8(. times. 106),49.0 .+-. 13.7(. times. 106)和29.9 .+-。8.6(. times. 106)分别在第4、8、12、16(NR)和16(R)天(p < 0.05,第4天相对于第8、12、16 NR天)。相比之下,大黄体细胞的数量为11.8 ±。1.5(. times. 106)在第4天,并且在发情周期的剩余时间内没有显著变化。 从第4天到第16天(NR),非类固醇生成细胞类型的数量增加(p < 0.05),但在退化的黄体中(第16天R)减少。退化的特征在于每个黄体的细胞总数从243 ± 0.05减少505(p < 0.05)。57(×)106)第16天(NR)至第125天。14(×)106)每个黄体的细胞总数为243 ± 100个。57(×)106)第16天(NR)至第125天。14(×)106)在第16天(R)(p < 0.05)。小黄体细胞在整个发情周期中体积保持恒定(2520 ± 0.001)。270 μ m3),而大的黄体细胞的大小从5300 ± 270 μ m3增加。第4天800 μ m3至16,900 μ m3。第16天3300 μ m3(NR)(p < 0.05)。总之,在整个发情周期中,小黄体细胞的数量增加,但大小不变,而大黄体细胞的大小增加,但数量不变。
The cellular composition of ovine corpora lutea obtained during the early (Day 4), mid (Days 8 and 12), and late (Day 16) stages of the estrous cycle was determined by morphometric analysis. Individual corpora lutea were collected via midventral laparotomy from a total of 19 ewes. A center slice from each corpus luteum was processed for electron microscopy and subsequent morphometric analysis of the numbers and sizes of steroidogenic and nonsteroidogenic cells. Luteal weight progressively increased throughout the estrous cycle (p < 0.05). Corpora lutea collected on Day 16 were assigned to one of two subgroups on the basis of gross appearance and weight: nonregressed (NR, 542 .+-. 25 mg) or regressed (R, 260 .+-. 2 mg). There were no significant changes in the proportion of the corpus luteum occupied by small luteal cells (19 .+-. 2%) or large luteal cells (36 .+-. 1%) througout the estrous cycle. The total number of steroidogenic cells per corpus luteum increased from 21.8 .+-. 3.7 (.times. 106) on Day 4 to 61.7 .+-. 5.4 (.times. 106) on Day 8 (p < 0.05) and remained elevated thereafter. The number of small luteal cells was 10.0 .+-. 2.7 (.times. 106), 39.7 .+-. 1.4 (.times. 106), 46.1 .+-. 5.8 (.times. 106), 49.0 .+-. 13.7 (.times. 106), and 29.9 .+-. 8.6 (.times. 106) on Days 4, 8, 12, 16 (NR), and 16 (R), respectively (p < 0.05, Day 4 vs. Days 8, 12, 16 NR). In contrast, the number of large luteal cells was 11.8 .+-. 1.5 (.times. 106) on Day 4 and did not vary significantly during the remainder of the estrous cycle. The numbers of nonsteroidogenic cell types increased (p < 0.05) from Day 4 to Day 16 (NR) but were decreased in regressed corpora lutea (Day 16 R). Regression was characterized by a 505 decrease (p < 0.05) in the total number of cells per corpus luteum from 243 .+-. 57 (.times. 106) on Day 16 (NR) to 125 .+-. 14 (.times. 106) in the total number of cells per corpus luteum from 243 .+-. 57 (.times. 106) on Day 16 (NR) to 125 .+-. 14 (.times. 106) on Day 16 (R) (p < 0.05). Small luteal cells remained constant in volume throughout the entire estrous cycle (2520 .+-. 270 .mu.m3), whereas large luteal cells increased in size from 5300 .+-. 800 .mu.m3 on Day 4 to 16,900 .+-. 3300 .mu.m3 on Day 16 (NR) (p < 0.05). In summary, small luteal cells increased in number but not size throughout the estrous cycle, whereas large luteal cells increased in size but not number.