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. 2014 Jul 3;2014:578698. doi: 10.1155/2014/578698

Table 1.

Approximate diameter (D c), average volume (V c), and number of autophagic elements (N c) in a cell with 5000 μm3 cytoplasm, calculated from the specific surface values (S v /V v = S sp) from real experimental samples of liver and exocrine pancreatic cells. The details of calculation are described in the text.

Experimental system and treatment Category S v
μm2/μm3
V v
μm3/μm3
S sp
μm2/μm3
D c
μm
V c
μm3
N c in 
5000 μm3
Isolated hepatocytes
 Plus amino acid mixture 30 min Afs 0,0023 0,0003 7,6 0,79 0,26 6
Al 0,0147 0,0022 6,8 0,88 0,36 30
 Plus amino acid mixture 3 h Afs 0,0047 0,0006 7,4 0,81 0,28 11
Al 0,0367 0,0072 5,1 1,18 0,85 42
 Minus amino acid mixture 
 3 h 30 min
Afs 0,0472 0,0067 7,0 0,86 0,33 102
Al 0,1333 0,0215 5,9 0,97 0,47 195
 Propylamine 10 mM 3 h Afs 0,0856 0,0124 6,9 0,87 0,34 180
Al 0,0563 0,0084 6,7 0,90 0,38 112
Alam 0,2925 0,1170 2,5 2,40 7,24 81

Hepatocytes in vivo
 3 h feeding Afs 0,0024 0,0003 7,9 0,76 0,23 7
Al 0,0040 0,0005 7,9 0,76 0,23 11
Db 0,0088 0,0008 11,0 0,55 0,08 47
 24 h fasting Afs 0,0101 0,0014 7,2 0,84 0,31 23
Al 0,0171 0,0022 7,8 0,77 0,24 46
Db 0,0079 0,0008 9,9 0,61 0,12 34
 Ad libitum feeding Afs 0,0025 0,0003 8,5 0,71 0,18 8
Al 0,0048 0,0006 8,0 0,75 0,22 14
 Vinblastine treatment 
 0,1 mg/g 2 h
Afs 0,0778 0,0105 7,4 0,81 0,28 189
Al 0,0648 0,0086 7,5 0,80 0,26 163
 Leupeptin treatment 
 0,12 mg/g 2 h
Afs 0,0450 0,0054 8,3 0,72 0,20 138
Al 0,1095 0,0278 3,9 1,52 1,85 75

Exocrine pancreas cells in vivo
 24 h fasting Afs 0,0050 0,0007 7,2 0,83 0,30 12
Al 0,0061 0,0009 6,8 0,89 0,36 12
 Ad libitum feeding Afs 0,0016 0,0002 7,9 0,76 0,23 4
Al 0,0024 0,0003 7,8 0,77 0,23 6
 Vinblastine treatment 
 0,1 mg/g 1 h
Afs 0,0447 0,0063 7,1 0,85 0,32 99
Al 0,0233 0,0034 6,8 0,88 0,35 48
 Vinblastine treatment 
 0,1 mg/g 1,5 h
Afs 0,1073 0,0159 6,8 0,89 0,37 216
Al 0,0401 0,0060 6,7 0,90 0,38 79
 Vinblastine treatment 
 0,1 mg/g 6 h
Afs 0,3362 0,0518 6,5 0,92 0,41 626
Al 0,3081 0,0517 6,0 1,01 0,53 484

Afs: autophagosome (early autophagic vacuole), Al: autolysosome (late autophagic vacuole), Db: dense body, Alam: swollen electron-lucent amine type of autolysosome.

The experimental animals were from male mice for in vivo treatments and from rats for isolated cells. The evaluated cytoplasmic area was in the range of 9–16000 μm2. For further details of electron microscopy, morphometry, and experimental systems see, for example, in [510].