Colorations Flashcards

1
Q

fibres collagène

A

coloration topographique: trichrome = HE + bleu d’aniline ou vert lumière

rouge sirius

HES: hématoxyline, éosine, safran

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2
Q

fibres élastiques

A

ø colorations classiques

orcéine (rouge/ rose)

fuchsine/ résorcine (bleu violet)

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3
Q

fibres réticuline = coll type III

A

imprégnation argentique de Wilder (noires)

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4
Q

lipides

A

Oil red

Rouge soudan

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5
Q

glucides

A

Bleu alcian: protéoglycanes et mucines

PAS: réaction histochimique

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6
Q

dépôts minéraux

A

Calcium →
rouge d’alizarine S
Van Kossa

Fe → bleu de Prusse

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7
Q

DAPI et Hoechst

A

fluorochromes
ADN
bleu

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8
Q

Calcéine

A

fluorochrome
Ca2+ Mg2+
vert

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9
Q

Fura-2

A

fluorochrome
sonde calcique Ca2+
vert

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10
Q

Phalloïdine - Rhodamine

A

fluorochrome
actine F aka fillamenteuse
rouge

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11
Q

couplage Ac w/ enzymes

A
HRP = horseradish peroxydase
substrat = diaminobenzidine (DAB)

Phosphatase alcaline

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12
Q

couplage Ac w/ fluorochrome

A

Isothiocyanate de fluorescéine (FITC vert)

Phycoérythrine (PE, rouge)

Alexafluors (+ieurs couleurs)

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13
Q

colorants vitaux les + utilisent

A

bleu trypan
eosine
propidium

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14
Q

MET coupes semi-fines colorées

A

bleu de toluidine (basique)

pénètre dans résine d’epoxy (rare)

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15
Q

MET contraste sels de métaux lourds

A

acétate d’uranyle: augmente contraste noyau/ ribosomes

citrate de plomb: augmente contraste mb + permet visualisation en niveaux de gris

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16
Q

colorants acides

A

eosine
acide picrique
fuchsine acide

cytoplasme
extracell

17
Q

colorants basiques

A

hématoxyline
bleu de méthylène
safranine

noyau

18
Q

colorations frottis

A

MGG:
H: noyaux
E: cytoplasme

Bleu de Toluidine: basique meta chromatique
affinité pour (-)

Harris Shorr

19
Q

auto-fluorescence naturelle

A
  • mitochondries
  • lysosomes
  • MEC: élastine/ collagène
  • prot riches en tryptophanes, tyrosines
  • NADPH,NADH
20
Q

mise en évide de la sénescence: activité β galactosidase in situ

A

Xgal → X (bleu) + galactose (incolore) obs MO
C12FDG → produit fluo vert
obs en microscopie à fluo