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Table 1 Summary of hyperthermia, reactive microglia, and neurodegeneration after METH exposure

From: Vascular-directed responses of microglia produced by methamphetamine exposure: indirect evidence that microglia are involved in vascular repair?

    

Brain regions

    

Septum

Hippocampus

Thalamus

Parietal cortex

Rat ID

Time point (days)

Peak BT (°C)

Times BT ≥ 41.7 °C

aFJc labeling

bActivated microglia

aFJc+ labeling

bActivated microglia

cFJc labeling

bActivated microglia

cFJc labeling

bActivated microglia

FG278

3ys

41.6

1

FG279

3

41.0

1

FG230

3

42.0

4

FG288

3

41.9

20

++

2

FG227

3

42.2

+

+++

+++

17

+

8

+

FG268

3

42.6

3

10

+

FG298

3

42.0

+

+

5

+

10

+

FG289

3

42.7

+

38

+++

9

+

FG269

3

42.6

+

+

27

++

2

FG228

3

42.3

+

+++

++++

132

++++

7

+

FG267

3

42.3

+

++++

++++

37

+++

4

+

FG291

3

42.2

+

++++

++++

91

++++

12

+

FG311

3

42.4

+

+++

++

53

+++

7

+

FG258

1

41.9

0

3

FG259

1

42.3

6

6

FG260

1

42.1

0

3

FG310

1

42.2

+?

+?

+?

+?

53

6

  1. Data relating to neurodegeneration or microglia activation for the four control animals is not shown since it was all negative. The correlation between the numbers of times body temperature was ≥41.7 °C, and the relative number of activated microglia within a region was determined using the Spearman rank-order correlation method. The correlation coefficients were as follows: septum, r = 0.781, p = 0.0008; hippocampus, r = 0.850, p < 0.00001; thalamus, r = 0.927, p < 0.00001; parietal cortex, r = 0.652, p < 0.014. The correlation between the numbers of times body temperature was ≥41.7 °C and the relative number of FJc within a region was determined using the Pearson product-moment correlation. The correlation coefficients were as follows: thalamus, r = 0.714, p = 0.0061; parietal cortex, r = 0.546, p = 0.054 not significant
  2. aFJc positive fibers (>10 per 25-μm section per hemisphere) observed in the medial septum
  3. bRelative number of activated Iba1 immunoreactive cells/microglia per 25-μm section per hemisphere such that per region per hemisphere: (−) indicates <5 cells per region; (+) 5 to 20 cells; (++) 20 to 100 cells; (+++) >100 cells
  4. cFJc positive cells per 25-μm section per hemisphere observed in thalamus or parietal cortex