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. 2019 Oct 10;10:4602. doi: 10.1038/s41467-019-12373-5

Fig. 4.

Fig. 4

Improvement of re-vascularization of rat islets and diabetes correction in SCID-Beige mice. a Schematics and a microscopic image of rat islets (green) in a Mesh device. Microvascular mesh is red and nylon grid is blue. b Non-fasting blood glucose (BG) concentration of the mice after transplantation. Grafts were retrieved after different time points. Most of the mice were kept alive for 1 week after retrieval while 3 mice from the Mesh group were used for perfusion studies prior to retrievals. During 42 days of transplantation (n = 9 in No cell, n = 11 in Random, and n = 14 in Mesh): *P < 0.05 and NS (P > 0.05) no significant difference. ANCOVA, time was treated as continuous covariate. c BG concentrations during intraperitoneal glucose tolerance tests (IPGTT) after 30 and 90 days of transplantation. IPGTT at Day 30 (n = 6 in Normal mice and No cell, n = 8 in Random and Mesh). Data are mean ± SEM. *P < 0.05 and NS (P > 0.05) no significant difference. ANCOVA, time was treated as continuous covariate. d Hematoxylin/eosin staining of rat islets and blood vessels in retrieved devices (Day 42) and the number of blood vessels around a rat islet (within a 200 μm distance). Yellow arrowheads point to blood vessels with erythrocytes inside. White arrows point to rat islets. The round material in the cross-sections is nylon grid. No cell group consists of 11 islets pooled from 3 mice; Random group consists of 13 islets pooled from 3 mice; Mesh group consists of 12 islets pooled from 3 mice. *P < 0.05, ***P < 0.001, and NS (P > 0.05) no significant difference. One-way analysis of variance. e Cross-sectional immunostaining images of rat insulin (red) and mouse blood vessels (CD31, green) in a retrieved Mesh device. f Immunostaining images (parallel section) using human (red) and mouse (green) CD31 antibodies indicate the anastomoses between human and mouse blood vessels. g Confocal image of perfused blood vessels in re-vascularized rat islets in the Mesh group after 42 days of transplantation. h Fluorescent images of re-vascularized rat islets after 91 and 112 days of transplantation from the Mesh group. The rat islets expressing GFP are green and perfused blood vessels are red