Friday, January 18, 2019

Markers for the Study of Diabetic Neuropathy

Widely Used and Frequently Published
Our Pain and Inflammation Research Antibodies have proven valuable for the study of neuropathic, nociceptive and inflammatory pain.

This recent publication is focused on Diabetic Neuropathy. José Eduardo Roa-Coria, Jorge Baruch Pineda-Farias, Paulino Barragán-Iglesias, Geovanna Nallely Quiñonez-Bastidas, Ángel Zúñiga-Romero, Juan Carlos Huerta-Cruz, Juan Gerardo Reyes-García, Francisco Javier Flores-Murrieta, Vinicio Granados-SotoView ORCID ID profile and Héctor Isaac Rocha-González (2019). Possible involvement of peripheral TRP channels in the hydrogen sulfide-induced hyperalgesia in diabetic rats. BMC Neuroscience 201920:1 https://doi.org/10.1186/s12868-018-0483-3.

The results show Hydrogen Sulfide (H2S) catalyzes hyperalgesia in rats via TRP Channels. Our Substance P is used in the study.


Figure: Immunolocalization of cystathionin-β-synthase enzyme (CBS, red) with a–e neuronal nuclear antigen (NeuN)-, f–j substance P (SP)-, k–o isolectin B4 (IB4)- and p–t glial fibrillary acidic protein (GFAP)-positive dorsal root ganglion neurons of diabetic rats (green). a, f, k and p show a representative 16 µm-slice from dorsal root ganglia. b, g, l and q show a representative CBS staining with Cy3 from dorsal root neurons, whereas c, h, m and r show NeuN, SP, IB4 and GFAP representative staining with Cy2 in dorsal root neurons, respectively. d, i, n and s show the merged image from Cy3 and Cy2 signals, the overlapping between CBS and neuronal markers is shown in a yellow-orange color. e, j, o and t show a magnification of d, i, n and s, respectively.


The authors conclude that H2S leads to hyperalgesia in diabetic rats through activation of TRPV1, TRPA1 and TRPC channels and, subsequent intraepidermal fibers loss. CBS enzyme inhibitors or TRP-channel blockers could be useful for the treatment of painful diabetic neuropathy.

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