The successful cryopreservation of reproductive cells has important practical significance in many fields. In order to improve the recovery rate and viability of cryopreserved cells, it is necessary to study the permeability characteristics of cell membrane to both water and cryoprotectant. In this paper we review the studies on membrane permeability of animal reproductive cell for the recent years. We firstly list the typical permeability data of spermatozoa and oocyte membrane for water and cryoprotectant. We then analyze the effects of these characteristics on the design of cryopreservation protocol. We also introduce the latest experimental methods to measure the cell membrane permeability.
Animals ; Cell Membrane Permeability ; physiology ; Cryopreservation ; methods ; Female ; Humans ; Male ; Oocytes ; cytology ; Spermatozoa ; cytology

Cryopreservation is essential for the long-term storage and banking of cartilage grafts. This paper reviews the developments on the cryopreservation of cartilage and transplantation of cryopreserved cartilage grafts during the past 10 years. It is stated that the current technologies for cryopreservation of cartilage grafts are not mature. Further systematic studies are necessary.
Animals ; Cartilage ; transplantation ; Cryopreservation ; Humans ; Tissue Preservation ; methods

Objective To investigate the history, current situation and ecological environment of Chongqing wild and cultivated Fritillaria taipaiensis resources; To provide references for protection and industrial development of Fritillaria taipaiensis resources. Methods Data query, on-the-spot investigation and follow-up survey were used in the study. Results Chongqing Fritillaria taipaiensis was in the medical records since 1843. Now 5 counties have wild Fritillaria taipaiensis resources and 6 districts have cultivated Fritillaria taipaiensis resources, with 6 typical ecological types. Conclusion Chongqing wild Fritillaria taipaiensis resources are wide distributed and with long history of medical usage. Chongqing is the original producing area of Fritillaria taipaiensis, which has been destroyed by human factors. Fritillaria taipaiensis resources in several districts have become extinct, however, the cultivated Fritillaria taipaiensis resources is developing rapidly.

OBJECTIVETo analyze the clinical feature of early newborn infants with congenital heart disease.

METHODSWe retrospectively analyzed the clinical features of 477 newborn infants with congenital heart disease born within seven days out of 28 050 live births in Shaoxing women and children hospital from October 1, 2009 to September 30, 2012. Infants with congenital heart disease were divided into single malformation group (240 cases), composite deformity group (199 cases) and multiple malformations group (38 cases). Differences of clinical feature were compared between the three groups.

RESULTSAtrial septal defect was the most malformation 91.6% (437/477) .Incidence of preterm birth was higher in newborn inants with congenital heart disease [512.23/10 000(134/2 616)] than infants without without congenital heart disease [134.86/10 000 (343/25 434) , P < 0.01]. Proportion of preterm birth among the three congenital heart disease groups was similar (P > 0.05) . The incidence of small for gestational age in congenital heart disease group (10.90%, 52/477) was also significantly higher than those without congenital heart disease group (5.91%, 1 630/27 573, P < 0.01).Small for gestational age with congenital heart disease of complex malformations, multiple malformations groups was higher than that in the single malformation group (P < 0.01 and P < 0.05).

CONCLUSIONSEarly newborn with atrial septal defect is the most common neonatal congenital heart disease. The incidence of preterm is higher in newborn infants with congenital heart disease. Complex and multiple malformations are linked with small for gestational age birth weight.

Female ; Heart Defects, Congenital ; diagnosis ; Heart Septal Defects, Atrial ; diagnosis ; Humans ; Infant, Newborn ; Infant, Small for Gestational Age ; Male ; Premature Birth ; Retrospective Studies