Our working group has consolidated in the research of Histology based on Cell and Molecular Biology; it has contributed to lay down the origin of a dynamic morphology that allow us the interpretation of a cell as a molecular network constantly moving and uninterruptedly transforming. Thus, we analyze the way that cell and tissue components and organs carry out functions, the way cells communicate and interact, and also the way organisms coordinate and regulate their innumerable activities at a cellular level. On the other hand, we were able to analyze how the morphological point of view holds singular relationships with problems belonging to other disciplines. Over these years we have established intra-institutional cooperation links with the Limnology Laboratory and the group of Functional Morphology and Behavior; and inter-institutional cooperation with INIDEP, the Faculty of Veterinary Sciences of the UNLP, the Faculty of Veterinary Sciences of the UNICEN, INTEMA and the Institute of Marine Research (Superior Council of Scientific Research) from Vigo, Spain.

The objectives of our group are to promote the exchange of knowledge among researchers interested in:

  • The morphological study of the optic and electronic microscopy of invertebrates and vertebrates of regional interest.

  • The analysis of the histochemical and immunohistochemical composition of muscle fiber types of teleost fishes and autochthonous rodents.

  • The analysis by means of histochemical techniques of the glycoproteins present in tissues and organs, their distribution and the possible physiological roles in relation to the different cell types studied.

  • The identification of sugar residues glycoprotein-specific by means of biotinylated lectins.

  • The identification and study of the diverse cell types in tissues and organs by means of immunohistochemical techniques.

  • The determination of the trabecular bone tissue histomorphometric characteristics around Zr0 and Zr60 intramedullary transplants.

  • Promoting intra- and inter-institutional cooperation links, as well as the formation of human resources.

  • Encouraging the carrying out of workshops, symposia, national and international congresses and making regular journal papers on the results obtained in the diverse research areas.

Nowadays, we are focusing on the study of the morphological and histochemical characteristics of various organs and tissues, and the modifications that extrinsic and intrinsic factors exert on different species of crustacean decapods, marine and fresh water fishes and rodents. A deep and integrated comprehension of those features in the diverse species to be studied is essential to preserve and increase our biological resources.

We currently distinguish the following areas and subareas:
Histological, histochemical and ultrastructural studies in invertebrates:
Muscle and hepatopancreas of decapod crustaceans.
Effect of salinity on the histochemical characteristics of the hepatopancreas and muscle of crustacean decapods.

Histological, histochemical, immunohistochemical and ultrastructural studies in vertebrates:

Muscle, gills and digestive system of teleost fishes.
Digestive system in fish larvae at different stages of their ontogenetic development.
Digestive system of autochthonous rodents.
Cajal’s interstitial cells in autochthonous rodents.
Muscles of autochthonous rodents.
Bone tissue surrounding zirconium implants with no treatment (Zr0) and with anodizing treatment at 60V (Zr60).

Dra. Cohen Stefanía
Researcher CONICET
Cohen, S., Díaz, A. O., & Díaz, M. V. (2021). Morphological and biochemical approaches to assess the nutritional condition of the Argentine hake Merluccius hubbsi larvae from two different nursery areas. Journal of Fish Biology, 98(1), 132–141. https://doi.org/10.1111/jfb.14563
Miranda, V., Cohen, S., Díaz, A. O., & Díaz, M. V. (2020). Development of the visual system of anchovy larvae, Engraulis anchoita: A microanatomical description. Journal of Morphology, 281(4–5), 465–475. https://doi.org/10.1002/jmor.21113
Cohen, S., Díaz, M. V., & Díaz, A. O. (2020). Development of the digestive system of Argentine hake, Merluccius hubbsi, larvae. Journal of Morphology, 281(6), 578–590. https://doi.org/10.1002/jmor.21122
Cohen, S., Freijo, R. O., Petcoff, G. M., Portiansky, E. L., Barbeito, C. G., Macchi, G. J., & Díaz, A. O. (2016). Glicoconjugados del ovario de Genypterus blacodes y su importancia en la biología reproductiva. Ciencias Morfológicas, 18(1), 1–9. http://sedici.unlp.edu.ar/handle/10915/55444
Cohen, S., Petcoff, G., Freijo, R. O., Portiansky, E. L., Barbeito, C. G., Macchi, G. J., & Díaz, A. O. (2015). Histochemical characterization of oocytes in the pink cuskeel (Genypterus blacodes). Zoological Science, 32(4), 383–388. https://www.bioone.org/doi/full/10.2108/zs140235
Cohen, S., Díaz, M. V., & Díaz, A. O. (2014). Histological and histochemical study of the digestive system of the Argentine anchovy larvae (Engraulis anchoita) at different developmental stages of their ontogenetic development. Acta Zoologica, 95(4), 409–420. http://onlinelibrary.wiley.com/doi/10.1111/azo.12038/full