The search for a useful method for the optimal cryopreservation of adipose aspirates

Part II. in vivo study

Cui Xiangdong Cui, Lee Li-Qun Pu

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Purpose: The previous in vitro study showed that trehalose, when used as a cryoprotective agent (CPA) in an optimal concentration, can provide adequate protection of adipose aspirates during cryopreservation. Objective: The authors evaluated the efficacy of trehalose in its optimal concentration for cryopreservation of human fat grafts in a well-established animal model. Methods: In this study (n = 20 in each group), adipose aspirates were harvested and processed from a female patient; the protocol for freezing and thawing of fat grafts was the same as the in vitro study. In the control group, 0.5 mL of fresh fat grafts was injected into the posterior scalp of a nude mouse. In the cryopreservation group 1, a combination of dimethyl sulfoxide (in 0.5M) and trehalose (in 0.2M) was injected as a CPA. In the cryopreservation group 2, only the optimal concentration of trehalose (in 0.35M) was administered as a CPA. In both cryopreservation groups, 0.5 mL of cryopreserved fat grafts was thawed and injected into the animal in the same manner as the control group. All animals in each group were observed for gross appearance of maintained fat grafts over their posterior scalps for up to eight weeks. The final volume and weight of maintained fat grafts and their histology were evaluated at the end of the study. Results: Group 2, compared with group 1, respectively, had equivalently maintained volume (38.2 ± 10.1% versus 46.1 ± 14.4%, ns) and weight (34.1 ± 12.1% versus 38.9 ± 14.7%, ns). However, the results from both cryopreservation groups were still inferior to those from the control group (both P <.05). Histologically, the basic structure of adipose tissue was maintained in all three groups. Conclusion: Trehalose, serving as a CPA in its optimal concentration, appears to provide adequate protection of human fat grafts during cryopreservation in vivo. Such protection is similar to that provided by the combination of dimethyl sulfoxide and trehalose as a CPA. Because of its safety and effectiveness, trehalose can possibly be administered to patients for long-term preservation of their fat grafts.

Original languageEnglish (US)
Pages (from-to)451-456
Number of pages6
JournalAesthetic Surgery Journal
Volume30
Issue number3
DOIs
StatePublished - 2010

Fingerprint

Cryopreservation
Trehalose
Cryoprotective Agents
Fats
Transplants
Dimethyl Sulfoxide
Scalp
Control Groups
Weights and Measures
Nude Mice
Freezing
Adipose Tissue
Histology
Animal Models
Safety

Keywords

  • adipose aspirates
  • banking
  • cryopreservation
  • fat grafts
  • trehalose

ASJC Scopus subject areas

  • Surgery
  • Medicine(all)

Cite this

The search for a useful method for the optimal cryopreservation of adipose aspirates : Part II. in vivo study. / Xiangdong Cui, Cui; Pu, Lee Li-Qun.

In: Aesthetic Surgery Journal, Vol. 30, No. 3, 2010, p. 451-456.

Research output: Contribution to journalArticle

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abstract = "Purpose: The previous in vitro study showed that trehalose, when used as a cryoprotective agent (CPA) in an optimal concentration, can provide adequate protection of adipose aspirates during cryopreservation. Objective: The authors evaluated the efficacy of trehalose in its optimal concentration for cryopreservation of human fat grafts in a well-established animal model. Methods: In this study (n = 20 in each group), adipose aspirates were harvested and processed from a female patient; the protocol for freezing and thawing of fat grafts was the same as the in vitro study. In the control group, 0.5 mL of fresh fat grafts was injected into the posterior scalp of a nude mouse. In the cryopreservation group 1, a combination of dimethyl sulfoxide (in 0.5M) and trehalose (in 0.2M) was injected as a CPA. In the cryopreservation group 2, only the optimal concentration of trehalose (in 0.35M) was administered as a CPA. In both cryopreservation groups, 0.5 mL of cryopreserved fat grafts was thawed and injected into the animal in the same manner as the control group. All animals in each group were observed for gross appearance of maintained fat grafts over their posterior scalps for up to eight weeks. The final volume and weight of maintained fat grafts and their histology were evaluated at the end of the study. Results: Group 2, compared with group 1, respectively, had equivalently maintained volume (38.2 ± 10.1{\%} versus 46.1 ± 14.4{\%}, ns) and weight (34.1 ± 12.1{\%} versus 38.9 ± 14.7{\%}, ns). However, the results from both cryopreservation groups were still inferior to those from the control group (both P <.05). Histologically, the basic structure of adipose tissue was maintained in all three groups. Conclusion: Trehalose, serving as a CPA in its optimal concentration, appears to provide adequate protection of human fat grafts during cryopreservation in vivo. Such protection is similar to that provided by the combination of dimethyl sulfoxide and trehalose as a CPA. Because of its safety and effectiveness, trehalose can possibly be administered to patients for long-term preservation of their fat grafts.",
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