A Catholic perspective on human gene therapy.

The questions of changes in the human genetic program have been debated by world legislatures, churches, and scientific communities. Papal teachings emphasize a global respect for each patient and the sacred dignity of all human beings. We outline six moral principles proposed as Catholic Christian perspective applicable to a bioethical evaluation of advances in human gene transfer.

OVARIAN DEVELOPMENT IN HABROBRACON JUGLANDIS (ASHMEAD) (HYMENOPTERA: BRACONIDAE). I. THE ORIGIN AND DIFFERENTIATION OF THE OOCYTENURSE CELL COMPLEX.

Normal oogenesis in the adult wasp, Habrobracon juglandis, is described. Accounts are given of: (1) the mitotic behavior of oogonia and cystocytes: (2) the production of synaptonemal complexes by pro-oocytes in the germarium; (3) the formation of an egg chamber and its movement through the vitellarium; (4) the ultrastructural details of the transfer of cytoplasmic organelles to the oocyte by the nurse cells; and (5) the production of accessory muclei and protein yolk spheres in the ooplasm. Comparisons are drawn between Habrobracon and other insects with respect to: (1) the cystocyte divisions, the origin of ring canals, and the control of pro-oocyte differentiation; (2) the possible symbiotic relationships of bacteria which reside in ovarian tissue; (3) the proposed functions performed by accessory nuclei and protein yolk spheres; and (4) the synthesis of rRNA by the nurse cells.