control-conjugates

Radley JJ, Gosselink KL, Sawchenko PE (2009) A discrete GABAergic relay mediates medial prefrontal cortical inhibition of the neuroendocrine stress response. J Neurosci 29:7330-7340. doi: 10.1523/JNEUROSCI.5924-08.2009

Summary: GABAergic neurons have been implicated in the negative regulation of the hypothalamic-pituitary-adrenal axis (HPA). In order to clarify GABAergic input to the paraventricular hypothalamic nucleus the authors injected 0.23 µg of GAT1-SAP (Cat. #IT-32) into the anterior bed nucleus of the stria terminalis. Both unilateral and bilateral injections were used. Rabbit IgG-SAP (Cat. #IT-35) was used as a control. The data indicate that the GABAergic neuronal population functions as proximate mediator of HPA-inhibitory limbic influences.

Related Products: GAT1-SAP (Cat. #IT-32), Rabbit IgG-SAP (Cat. #IT-35)

Brightwell JJ, Taylor BK (2009) Noradrenergic neurons in the locus coeruleus contribute to neuropathic pain. Neuroscience 160:174-185. doi: 10.1016/j.neuroscience.2009.02.023

Summary: Noradrenergic neurons were eliminated with 5 µg intracerebroventricular injections of anti-DBH-SAP (Cat. #IT-03). Mouse IgG-SAP (Cat. #IT-18) was used as a control. Animals lesioned with anti-DBH-SAP displayed a reduction in behavioral signs of several kinds of allodynia.

Related Products: Anti-DBH-SAP (Cat. #IT-03), Mouse IgG-SAP (Cat. #IT-18)

Khan AM, Rapp KL, Ponzio TA, Sanchez-Watts G, Watts AG (2009) Featured Article: Deletion of catecholaminergic neurons by anti-DBH-saporin disrupts hypothalamic MAP kinase and CREB activation. Targeting Trends 10(2)

Related Products: Anti-DBH-SAP (Cat. #IT-03), Mouse IgG-SAP (Cat. #IT-18)

Read the featured article in Targeting Trends.

See Also:

• Khan AM et al. Stimulus-, circuit- and intracellular-level determinants of MAP kinase and CREB activation in parvicellular hypothalamic paraventricular neurons. Neuroscience 2008 Abstracts 865.23/MM24, 2008. Society for Neuroscience, Washington, DC

Dashniani MG, Beseliia GV, Maglakelidze GA, Burdzhanadze MA, Chkhikvishvili N (2009) Effects of the selective lesions of cholinergic septohippocampal neurons on different forms of memory and learning process. Georgian Med News 166:81-85.

Summary: The hippocampus is crucial for the ability to recollect everyday events and factual knowledge. Here the authors looked at the role of the septo-hippocampal cholinergic system of the medial septum in learning and memory. Rats received 200 ng injections of 192-IgG-SAP (Cat. #IT-01) into the medial septum. Mouse IgG-SAP (Cat. #IT-18) was used as a control. The data suggest that although the septo-hippocampal region is essential for spatial learning, hippocampal acetyl cholinesterase may not be essential for all types of hippocampal-dependent memory.

Related Products: 192-IgG-SAP (Cat. #IT-01), Mouse IgG-SAP (Cat. #IT-18)

Loyd DR, Wang X, Murphy AZ (2008) Sex differences in micro-opioid receptor expression in the rat midbrain periaqueductal gray are essential for eliciting sex differences in morphine analgesia. J Neurosci 28:14007-14017. doi: 10.1523/JNEUROSCI.4123-08.2008

Summary: The authors test whether the periaqueductal gray (PAG), that contains a dense population of µ-opioid receptor (MOR)-expressing neurons, is sexually dimorphic. Rats were injected with 3 pmol of Dermorphin-SAP (Cat. #IT-12) into the PAG. Blank-SAP (Cat. #IT-21) was used as a control. Both behavioral and immunohistochemical evidence suggest that differential expression of MOR-expressing neurons in the PAG between male and female rats accounts for the difference in response to morphine.

Related Products: Dermorphin-SAP / MOR-SAP (Cat. #IT-12), Blank-SAP (Cat. #IT-21)

Rouleau C, Curiel M, Weber W, Smale R, Kurtzberg L, Mascarello J, Berger C, Wallar G, Bagley R, Honma N, Hasegawa K, Ishida I, Kataoka S, Thurberg BL, Mehraein K, Horten B, Miller G, Teicher BA (2008) Endosialin protein expression and therapeutic target potential in human solid tumors: sarcoma versus carcinoma. Clin Cancer Res 14:7223-7236. doi: 10.1158/1078-0432.CCR-08-0499

Summary: Endosialin is an antigen expressed in many human cancer cell lines. As part of a wide-ranging study investigating clinical specimens, cell culture, and animal models, this group used Hum-ZAP (Cat. #IT-22) combined with a humanized anti-endosialin antibody in cell proliferation assays. Mouse IgG-SAP (Cat. #IT-18) was used as a control. The anti-endosialin antibody and Hum-ZAP were incubated together in equimolar concentrations then applied to cells in culture. Various cancers, including synovial sarcoma, fibrosarcoma, and osteosarcoma among others, were found to express endosialin.

Related Products: Hum-ZAP (Cat. #IT-22), Mouse IgG-SAP (Cat. #IT-18)

Di Sebastiano AR, Yong-yow S, Coolen LM (2008) The role of orexin in sexual behavior and sexual reward of the male rat. Neuroscience 2008 Abstracts 97.4/UU18. Society for Neuroscience, Washington, DC.

Summary: The hypothalamic neuropeptide orexin has been demonstrated to play a role in reward related to drugs of abuse and is potentially involved in regulation of natural rewarding behaviors. Male sexual behavior has been shown to activate orexin neurons and this behavior is altered by administration of orexin receptor agonists or antagonists. However, the exact role of orexin in male sexual performance, sexual motivation and reward is currently unclear. Therefore, the goal of the current study was to test the hypothesis that orexin plays a critical role in sexual behavior, motivation and reward. First, using Fos as a marker for neural activation, we investigated activation of orexin neurons following different parameters of sexual behavior in sexually naïve and experienced male rats. It was demonstrated that orexin neurons in the lateral hypothalamic area (LHA) and in the dorsal medial hypothalamus/perifornical (PFA-DMH) region become activated with presentation of the female and there is no further increase in activation with other components of mating (15-30% in LHA; 65-80% in PFA-DMH). Next, we tested the functional role of orexin utilizing orexin-cell body specific lesions. Adult male rats underwent lesion or sham surgery using the targeted toxin orexin-saporin or blank-saporin respectively. Following two weeks recovery, sexual behavior was recorded over the course of four mating trials. During the first mating trial, males with complete lesions showed significantly shorter latencies to mount and intromit. This suggests that lesions facilitated sexual performance in naïve animals. This facilitation was attenuated by sexual experience as lesions did not affect any parameter of sexual behavior in experienced animals. Next, runway tests were conducted to determine motivation to run towards a potential partner over two conditioning trials. Lesions did not alter sexual motivation, as lesion and sham males all demonstrated increased speed to run towards an estrous female during the second trial. Finally, a conditioned place preference (CPP) paradigm was conducted as a measure of sexual reward. All groups formed a conditioned preference for the mating-paired chamber, indicating that lesions did not significantly disrupt sexual reward. Overall, these findings suggest that orexin does not play a critical role in male sexual performance, motivation, and reward, however may be involved in general arousal related to sexual behavior.

Related Products: Orexin-B-SAP (Cat. #IT-20), Blank-SAP (Cat. #IT-21)

Likhtik E (2008) Featured Article: Selective lesions of amygdala intercalated neurons using the Dermorphin-SAP immunotoxin reveal their role in conditioned fear. Targeting Trends 9(4)

Related Products: Dermorphin-SAP / MOR-SAP (Cat. #IT-12), Blank-SAP (Cat. #IT-21)

Read the featured article in Targeting Trends.

See Also:

• Likhtik E et al. Amygdala intercalated neurons are required for expression of fear extinction. Nature 454(7204):642-645, 2008.

Göz D, Studholme K, Lappi DA, Rollag MD, Provencio I, Morin LP (2008) Targeted destruction of photosensitive retinal ganglion cells with a saporin conjugate alters the effects of light on mouse circadian rhythms. PLoS ONE 3(9):e3153. doi: 10.1371/journal.pone.0003153 PMID: 18773079

Summary: Retinal ganglion cells expressing melanopsin photopigment are thought to be involved in non-image forming visual responses to light. The authors had a custom conjugate made between saporin and an anti-melanopsin antibody. A 400-ng injection of the melanopsin-SAP conjugate into the eye of a mouse resulted in a 57% loss of the targeted cells. Rabbit IgG-SAP (Cat. #IT-35) was used as a control. The data indicates that melanopsin-containing cells are involved in the response to certain non-image forming visual input.

Related Products: Melanopsin-SAP (Cat. #IT-44), Melanopsin Rabbit Polyclonal (Cat. #AB-N38), Melanopsin Rabbit Polyclonal, affinity-purified (Cat. #AB-N39), Rabbit IgG-SAP (Cat. #IT-35)

Likhtik E, Popa D, Apergis-Schoute J, Fidacaro GA, Pare D (2008) Amygdala intercalated neurons are required for expression of fear extinction. Nature 454(7204):642-645. doi: 10.1038/nature07167

Summary: Scientists have been using fear learning in animals to study human anxiety disorders. In order to investigate the contribution of amygdala plasticity to fear learning, rats received 0.25-µl bilateral infusions of 3-µM dermorphin-SAP (Cat. #IT-12) into the amygdala. Blank-SAP (Cat. #IT-21) was used as a control. Lesioned rats displayed extinction expression deficits, indicating that the eliminated intercalated amygdala neurons play a large role in the extinction process.

Related Products: Dermorphin-SAP / MOR-SAP (Cat. #IT-12), Blank-SAP (Cat. #IT-21)

Read the featured article in Targeting Trends.