Leptin Protein, Human, Recombinant

Leptin Protein, Human, Recombinant is expressed in E. coli expression system. The predicted molecular weight is 16 kDa and the accession number is A4D0Y8.

Leptin Protein, Human, Recombinant

パッケージサイズ	在庫状況	単価(税別)
100 μg	在庫あり	￥ 13,000

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生物学的情報	Immobilized Human Leptin at 2 μg/mL (100 μL/well) can bind Human Leptin Receptor (His & hFc Tag), the EC50 of Human Leptin Receptor (His & hFc Tag) is 70-420 ng/mL.
説明	Leptin Protein, Human, Recombinant is expressed in E. coli expression system. The predicted molecular weight is 16 kDa and the accession number is A4D0Y8.

Species	Human
Expression Host	E. coli
Tag	Tag Free
Accession Number	A4D0Y8
別名	OBS, leptin, OB, LEPD
Construction	A DNA sequence encoding the mature form of human Leptin (NP_000221.1) (Val 22-Cys 167) was expressed, with an additional Met.
Protein Purity	> 98 % as determined by SDS-PAGE
分子量	16 kDa (predicted)

Endotoxin	Please contact us for more information.
Formulation	Lyophilized from sterile PBS, pH 7.4. Please contact us for any concerns or special requirements. Normally 5 % - 8 % trehalose, mannitol and 0. 01% Tween 80 are added as protectants before lyophilization. Please refer to the specific buffer information in the hard copy of CoA.
Reconstitution	A hardcopy of datasheet with reconstitution instructions is sent along with the products. Please refer to it for detailed information.
Stability & Storage	Samples are stable for up to twelve months from date of receipt at -20℃ to -80℃. Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Shipping	In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Research Background	Leptin is one of the most important hormones secreted by adipocytes, as an adipokine that modulates multiple functions including energy homeostasis, thermoregulation, bone metabolism, endocrine, and pro-inflammatory immune responses. The circulating leptin levels serve as a gauge of energy stores, thereby directing the regulation of energy homeostasis, neuroendocrine function, and metabolism. Recent studies suggest that leptin is physiologically more important as an indicator of energy deficiency, rather than energy excess, and may mediate adaptation by driving increased food intake and directing neuroendocrine function to converse energy, such as inducing hypothalamic hypogonadism to prevent fertilization. One of these functions is the connection between nutritional status and immune competence. The adipocyte-derived hormone Leptin has been shown to regulate the immune response, innate, and adaptive response, both in normal and pathological conditions. Thus, Leptin is a mediator of the inflammatory response. Leptin has a dual effect on bone, acting by two independent mechanisms. As a signal molecule with growth factor characteristics, leptin can stimulate osteoblastic cells and inhibit osteoclast formation and activity, thus promoting osteogenesis. However, as a molecule that stimulates sympathetic neurons in the hypothalamus, leptin indirectly inhibits bone formation. This inhibitory effect of leptin mediated by activation of the sympathetic nervous system can be abrogated by the application of blood pressure-reducing beta-blockers, which also inhibit receptors of hypothalamic adrenergic neurons. Leptin appears to regulate some features defining Alzheimer's disease (AD) at the molecular and physiological level. Leptin can stimulate mitogenic and angiogenic processes in peripheral organs. Because leptin levels are elevated in obese individuals and excess body weight has been shown to increase breast cancer risk in postmenopausal women. Furthermore, a recent report clearly shows that targeting leptin signaling may reduce mammary carcinogenesis.

参考文献

1. Surmacz E. (2007) Obesity hormone leptin: a new target in breast cancer? Breast Cancer Res. 9(1): 301. 2. Wodarski K,et al.(2009) Leptin as a modulator of osteogenesis. Ortop Traumatol Rehabil. 11(1): 1-6. 3. Tezapsidis N,et al.(2009) Leptin: a novel therapeutic strategy for Alzheimer's disease. J Alzheimers Dis. 16(4): 731-40. 4. Cai C,et al.(2009) Leptin in non-autoimmune inflammation. Inflamm Allergy Drug Targets. 8(4): 285-91. 5. Fernndez-Riejos P,et al.(2010) Role of leptin in the activation of immune cells. Mediators Inflamm. 2010: 568343. 6. Kelesidis T,et al.(2010) Narrative review: the role of leptin in human physiology: emerging clinical applications. Ann Intern Med. 152(2): 93-100.

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Leptin Protein, Human, Recombinant

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