[Theory of integrating cellular tension and consequences from it].

Tensegrity model and implications from it have been reviewed. Experimental data confirming the model are shown. While signal vectorization is well confirmed and well depicted by the model, the vectorization of expression implied by the model has not yet been elaborated.

[Differentiation of osteogenic cells in culture].

The regulatory factors and cell responses during osteogenic differentiation have been reviewed. Evidence has been provided on hormone and mechanical regulation and on the extracellular matrix (ECM). The data on responses of primary cell culture and constant cell lines of osteogenic origin to these regulations are represented in the number of tables.

[Two proteins from the nuclear matrix bind osteopontin gene promoter].

DNA transcription and replication are organized by the nuclear matrix. It has been recently shown that the osteocalcin gene promoter binds specifically two proteins, NMP-1 and NMP-2 (nuclear matrix proteins 1 and 2), from cell line ROS 17/2.8 (Bidwell et al.

[The collagen-binding membrane proteins of connective-tissue cells].

The pattern of cell membrane collagen-binding proteins was analysed by affinity chromatography with collagen types I, III and IV columns. We have found that connective tissue cells have three polypeptides which are able to recognize the types of collagen. These proteins have molecular weights 130, 190, and 250 kDa (reduced) according to SDS-PAGE.