Recombinant Human Leptin protein(LEP) (Active)

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Code CSB-AP000061HU
Size US$684Purchase it in Cusabio online store
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Product Details

Purity >97% as determined by SDS-PAGE and HPLC.
Endotoxin Less than 1.0 EU/μg as determined by LAL method.
Activity Fully biologically active when compared to standard. The ED50 as determined by a chemotaxis bioassay using human Leptin R transfected BaF3 murine proB cells is less than 2 ng/ml, corresponding to a specific activity of >5.0x105 IU/mg.
Target Names LEP
Uniprot No. P41159
Research Area Signal Transduction
Alternative Names FLJ94114; LEP; LEP_HUMAN; LEPD; Leptin (murine obesity homolog); Leptin (obesity homolog, mouse); Leptin; Leptin Murine Obesity Homolog; Leptin Precursor Obesity Factor; OB; Obese protein; Obese, mouse, homolog of; Obesity; Obesity factor; Obesity homolog mouse; Obesity Murine Homolog Leptin; OBS; OTTHUMP00000212285
Species Homo sapiens (Human)
Source E.coli
Expression Region 22-167aa
Complete Sequence VPIQKVQDDT KTLIKTIVTR INDISHTQSV SSKQKVTGLD FIPGLHPILT LSKMDQTLAV YQQILTSMPS RNVIQISNDL ENLRDLLHVL AFSKSCHLPW ASGLETLDSL GGVLEASGYS TEVVALSRLQ GSLQDMLWQL DLSPGC
Mol. Weight 16.0 kDa
Protein Length Full Length of Mature Protein
Tag Info Tag-Free
Form Lyophilized powder
Buffer Lyophilized from a 0.2 µm filtered PBS, pH 7.4
Reconstitution We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.
Troubleshooting
and FAQs
Protein FAQs
Storage Condition Store at -20°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Shelf Life The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Lead Time Basically, we can dispatch the products out in 5-10 working days after receiving your orders. Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
Notes Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Datasheet & COA Please contact us to get it.

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Target Data

Function Key player in the regulation of energy balance and body weight control. Once released into the circulation, has central and peripheral effects by binding LEPR, found in many tissues, which results in the activation of several major signaling pathways
Gene References into Functions
  1. chemerin and leptin are elevated and omentin-1 and visfatin levels are decreased in Gestational diabetes mellitus women complicated by obesity. PMID: 29337272
  2. study demonstrated novel molecular events for leptin-induced inflammation in ligamentum flavum (LF) tissue by promoting IL-6 expression and thus might have potential implications for clarifying the mechanism underlying LF fibrosis and hypertrophy. PMID: 29436483
  3. Leptin protein was significantly elevated in pre-liver transplantation alcoholics and was lowered post-transplantation. PMID: 29912265
  4. The AA genotype of leptin rs7799039 is associated with metabolic syndrome and higher serum leptin levels in Egyptian women PMID: 27966294
  5. In critically ill heart failure patients, the circadian rhythm of plasma leptin concentration seems to be preserved during the first but not during the third day after admission. PMID: 29527917
  6. a potential link between gastric leptin and microbial-derived metabolites in the context of obesity and diabetes PMID: 29851973
  7. Results show that LEP rs7799039 allele A was slightly associated with reduced total and LDL cholesterol suggesting that LEP genetic variant may be useful biomarker of cardiometabolic risk in obese patients. PMID: 28975585
  8. The aim of this study was to determine serum ghrelin and leptin levels in obese and lean Saudi women with Polycystic ovary syndrome and to investigate their relationship to the metabolic profiles in these women. PMID: 30131073
  9. The serum leptin level does not differ significantly between non-obese OSA patients with moderate/severe and snoring/mild OSA. PMID: 29174427
  10. Leptin concentrations are higher in the obese group irrespective of their glucose tolerance PMID: 29108900
  11. Leptin-to-adiponectin ratio and IL-6 were elevated in men with prostate cancer. Leptin, chemerin and IL-6 were associated with Gleason score. The relationships between leptin, chemerin and IL-6 were dependent on each other. PMID: 29465157
  12. Results provide new evidences for a modulatory effect of leptin in regulation of ovarian cancer cell invasion by stimulating MMP7 expression via ERK and JNK pathways. PMID: 28885729
  13. this study shows that leptin regulates the pro-inflammatory response in human epidermal keratinocytes PMID: 29468452
  14. AMH, IGF1 and leptin levels in follicular fluid have no relation to the fertility disorders caused by endometriosis or fallopian tube damage, though they are biomarkers for anovulatory fertility disorders. PMID: 29595066
  15. Our data provide evidence that leptin-mediated OPN upregulation promote TH2 inflammation in AR and this process is achieved through the alpha4 integrin and PI3K/AKT signaling pathways. PMID: 29885866
  16. By functional analysis based on a set of 1129 proteins from 494 obese subjects study identified and validated FAM46A as a trans regulator for leptin. PMID: 29234017
  17. Cord blood klotho levels were inversely correlated with leptin and insulin levels at birth PMID: 29648999
  18. Estradiol and physical activity were stronger predictors of leptin at menses, while sexual activity was a stronger predictor of leptin at ovulation. These findings suggest that predictors of serum leptin, and possibly energy storage and expenditure, vary across the menstrual cycle. PMID: 29454804
  19. leptin, leptin receptor and apelin receptor genes are associated with susceptibility to coronary artery disease and hypertension PMID: 29883719
  20. Serum levels of leptin (and adiponectin) were significantly and negatively associated with bone mineral density in patients with knee osteoarthritis. PMID: 29343264
  21. This study provides evidence that polymorphisms in the LEP and LEPR genes are associated with the magnitude of the effects of regular physical activity on glucose and LDL-C levels, respectively. In addition, we found the association of the G allele of the LEPR polymorphism with body mass and BMI PMID: 29373433
  22. Increased levels of mucosal leptin may interact with mast cells and the nervous system to contribute to the pathogenesis of diarrhea-predominant irritable bowel syndrome. PMID: 29358881
  23. Data suggest that expression of aquaporin-9 in term placenta is up-regulated by leptin. These studies used placental explants following term birth via cesarean section. PMID: 28942694
  24. by analyzing different estrogen receptor-alpha(ER-a)-positive and ER-a-negative breast cancer cell lines, we defined the role of CCN5 in the leptin-mediated regulation of growth and invasive capacity. PMID: 29370782
  25. LEP-rs7799039 was significantly associated with an increased risk for excessive gestational weight gain. PMID: 29241578
  26. Higher serum leptin levels can be used as a risk factor for childhood obesity. PMID: 29412799
  27. H. pylori infection decreased serum concentrations of leptin and obestatin in Mexican schoolchildren, suggesting alterations in regulating appetite and energy homeostasis. PMID: 28422951
  28. Data suggest that the stimulatory effects of leptin on proliferative activity of human normal prostate and prostate cancer cell lines require the expression of leptin receptor variant 1 in the affected cells. PMID: 29115533
  29. The findings suggest that the LEP G2548A genetic polymorphism may increase the susceptibility of cancers in non-Hodgkin's lymphoma (meta-analysis). PMID: 25536622
  30. Features of poor prognosis such as tumor invasion, lymph node involvement and distant metastasis have been recorded in several cancer types with higher levels of leptin and/or Ob-R. This review will describe the current scenario in a precise manner. In general, obesity indicates poor prognosis in cancer patients. [Review] PMID: 29158066
  31. Clinical data on secondary hyperparathyroidism, mainly derived from patients with chronic kidney disease, indicate a potential inverse association between leptin (LEP) and parathyroid hormone (PTH) in some, but not all studies. [REVIEW] PMID: 28730419
  32. Data suggest that transient increases in plasma adiponectin levels and transient decreases in plasma leptin levels occur following high-intensity interval exercise in overweight and obese young women. These studies were conducted in Turkey in formerly sedentary women ages 20-30 years. PMID: 28857629
  33. There was no simple, linear association of leptin and physical activity in adults with anorexia nervosa. PMID: 29099750
  34. Neoplastic cells appeared unable to downregulate NOX5 mRNA expression under leptin. Leptin emerged as a potential activator of ROS production in human epithelial mammary cells, where the ROS production was apparently linked to NOX5 activation. This novel finding could shed light on the potential role of obesity-associated hyperleptinemia in mammary cells via the activation of NOX enzymes PMID: 29048637
  35. Data suggest that serum leptin may be a potential biomarker for predicting sarcopenic obesity and physical performance in knee osteoarthritis. PMID: 28374624
  36. Leptin synergizes with IL-1beta in inducing ELF3 expression in chondrocytes. PMID: 29550824
  37. The nitrogen stable isotopic ratio in hair is positively associated with serum leptin levels. PMID: 29081462
  38. Heterozygous genotype AG of Single Nucleotide Polymorphism -2548 G/A of leptin gene (LEP) may reduce the risk of endometrial cancer independently of overall adiposity of an individual. Allele A alone of the studied polymorphism may be a risk factor of this malignancy in obese women, whereas allele G may decrease the hazard in these patients. PMID: 28964972
  39. Pregnant adolescents with leptin concentration over 20 ng/mL showed a greater gestational weight gain. Leptin concentration correlated with length and weight of the newborn. PMID: 28953229
  40. LEP and LEPR single-nucleotide polymorphisms are not associated with genetic susceptibility to systemic lupus erythematosus. PMID: 28244652
  41. The upregulation of miR27 inhibits the pathogenesis of osteoarthritis by targeting leptin and inhibiting the NF-kappaB signaling pathway. PMID: 28627582
  42. There was a direct association between the polymorphisms in LEP rs7799039 and ADIPOQ rs1501299 with overweight/obesity, and these genotypes affected the response to breast cancer chemotherapeutic treatment in Mexican women PMID: 28416193
  43. Habitual intake of SFA, MUFA, and n-3 fatty acids were associated with leptin gene expression in visceral and subcutaneous adipose tissues, suggesting an important role of quality and quantity of fatty acids intake in adipose tissue to regulate leptin expression. PMID: 29031395
  44. The studies established a potential link between leptin and adipocyte insulin responsiveness in an NOS2 dependent manner. PMID: 28739528
  45. Leptin serum levels drop following bariatric surgery and is predictive of disease remission in type 2 diabetes mellitus patients. PMID: 28734574
  46. alterations in leptin and SCD-1 in HCU patients PMID: 28801090
  47. leptin may have a role in androgenetic alopecia in men PMID: 28423238
  48. study is the first to describe the mechanism of leptin-promoted lymphangiogenesis by upregulating VEGF-C expression in chondrosarcomas. PMID: 27345723
  49. The study suggested that leptin accelerated the epithelial mesenchymal transition of A549cells through inhibiting autophagy via PI3K/Akt/mTOR pathway. PMID: 29524411
  50. Studied adiponectin (ADIPOQ), leptin (LEP), leptin receptor (LEPR), and resistin (RETN) single nucleotide polymorphisms and their association in obesity. Results showed that ADIPOQ 4522CPMID: 28195351

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Involvement in disease Leptin deficiency (LEPD)
Subcellular Location Secreted
Protein Families Leptin family
Tissue Specificity Adipose tissue is the main source of leptin it is also produced by other peripheral tissues such as the skeletal muscle (PubMed:7789654, PubMed:16052473, PubMed:12448771). Expressed by intercalated and striated tracts of submandibular and parotid salivary
Database Links

HGNC: 6553

OMIM: 164160

KEGG: hsa:3952

STRING: 9606.ENSP00000312652

UniGene: Hs.194236

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