Kukulies J, Komnick H
Eur J Cell Biol. 1984 May;34(1):118-29.
The larval enterocytes of A. cyanea absorb lipid after luminal lipolysis in morphologically invisible form by direct membrane transport, presumably molecular diffusion. The lipolytic products are utilized for resynthesis of di- and triglyceride which become visible in the form of lipid droplets in the groundplasm. The putative site of lipid synthesis is the apical ER which locally forms highly ordered complexes. Lipid transport occurs in the form of matrix lipid so that the enterocytes of dragonfly larvae resemble in this respect the lipid-secreting mammocytes rather than the lipid-absorbing mammalian enterocytes. Lipid release involves partial lipolysis and direct membrane transport, possibly including membrane delamination, again in contrast to exocytosis in mammalian enterocytes and apocrine extrusion in mammocytes, which are both indirect membrane transport mechanisms.
蓝尾豆娘幼虫的肠上皮细胞在管腔脂解后，通过直接的膜转运（推测为分子扩散）以形态上不可见的形式吸收脂质。脂解产物用于二酰甘油和三酰甘油的再合成，这些产物以脂质小滴的形式在地浆中变得可见。脂质合成的假定部位是顶端内质网，它局部形成高度有序的复合体。脂质以基质脂质的形式运输，因此在这方面蜻蜓幼虫的肠上皮细胞类似于分泌脂质的乳腺细胞，而不是吸收脂质的哺乳动物肠上皮细胞。脂质释放涉及部分脂解和直接的膜转运，可能包括膜分层，这再次与哺乳动物肠上皮细胞中的胞吐作用和乳腺细胞中的顶浆分泌不同，后两者都是间接的膜转运机制。
