Combined effects of testosterone and estradiol on the ventral lobe of the rat postate in organ culture]

After organ culture without hormone, the epithelial gland cells of Rat veantral prostate undergo atrophic changes, whereas the interstitial stroma components tend to increase. Estradiol (1-1,000 nM),added to the culture medium, is ineffective. On the contrary, testosterone (1-100 nM) maintains epithelial cells and prevents the increase of interstitial stroma. When estradiol (1-1,000 nM) is combined with a physiological concentration of testosterone (1-4 nM), the epithelial cells are well maintained, but the inhibitory action of testosterone on the stroma is counteracted so that the glandular epithelium and the interstitial stroma are both stimulated. However, when testosterone is used at supraphysiological (10-100 nM) concentrations, estradiol is completely ineffective and the structure of the prostate is identical to the one given by the androgen alone.     

Total amino acids in developing worker honey bees (Apis mellifera L.)

Zusammenfassung Glutaminsäure, Aspartinsäure und Prolin wurden in Eihomogenaten und Haemolymphe der Honigbiene (Apis mellifera L.) gefunden.     

Catecholamines and granular vesicles in adrenergic axons of the developing pineal body of the rat

Resumen Imediatemente después del nacimiento, las fibras adrenérgicas del cuerpo pineal del ratón, contienen solamente vesículas granulosas del tipo grande. Con dós dias, comienzan a aparecer las vesículas granulosas pequeñas; que son las que contienen nor-epinefrina. Se piensa que antes de ésta edad, la nor-epinefrina se localizaria principalmente en un compartimiento extra-vesicular.

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This material was presented at the meetings of the American Association of Anatomists, Kansas City, Missouri, 1967.