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Research library — page 112

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RPEP-12934 · 2025

How Kidney Disease Affects Tirzepatide Treatment for Heart Failure

CKD doubled heart failure event rates, but tirzepatide benefits were consistent across kidney function levels. Creatinine-based and cystatin C-based eGFR gave discordant results.

Pandey, Ambarish; Moroney, Michael; Verma, Subodh; Borlaug, Barry A; Butler, Javed; Davies, Melanie J; Kitzman, Dalane W; Shah, Sanjiv J; Petrie, Mark C; Rönnbäck, Cecilia; Domdey, Anne; Rasmussen, Søren; Chinnakondepalli, Khaja M; Patel, Shachi; Kosiborod, Mikhail N · Secondary Analysis

RPEP-12935 · 2025

Semaglutide Benefits Heart Failure Patients Regardless of Frailty Status

Semaglutide's efficacy in obesity-related HFpEF was consistent across frailty subgroups, and semaglutide treatment itself improved frailty status — a novel and clinically significant finding.

Pandey, Ambarish; Kitzman, Dalane W; Chinnakondepalli, Khaja M; Patel, Shachi; Borlaug, Barry A; Butler, Javed; Davies, Melanie J; Shah, Sanjiv J; Verma, Subodh; Rönnbäck, Cecilia; Domdey, Anne; Liisberg, Karoline; Schou, Morten; Perna, Eduardo; Ahmed, Fozia Z; Fu, Michael; Petrie, Mark C; Kosiborod, Mikhail N · Secondary Analysis

RPEP-12936 · 2025

Meta-Analysis: Oral Orforglipron Effectively Reduces Weight and Blood Sugar in Obese Adults

Meta-analysis confirmed orforglipron's efficacy for weight reduction and glycemic control in obese adults with or without T2DM, with a safety profile consistent with the GLP-1 drug class.

Pandey, Ravi Kumar; Jan, Mahnoor; Mohammad, Aqsa; Jawaid, Khawaja Arham; Naveed, Mawra; Abid, Muhammad Ali; Amir, Abdullah Bin; Ahmed, Shafique; Safiullah, Muhammad; Bhatti, Muhammad Imaz; Iftikhar, Sana; Saddique, Muhammad Nabeel; Alfalh, Widyan; Omar, Rihab Mohammed Bin; Abu Dawood, Husam · Meta Analysis

RPEP-12937 · 2025

Peptide Radiation Therapy Triggered a Dangerous Cortisol Surge in a Cushing Syndrome Patient

PRRT triggered an acute ACTH-mediated hypercortisolemic crisis in a patient with ectopic Cushing syndrome, with cortisol reaching 141 µg/dL (normal: 5-25 µg/dL) and ACTH >2000 pg/mL, requiring emergency management.

Pandit, Raghavendra; Yamichannaiah, Chethan; Lila, Anurag Ranjan; Karlekar, Manjiri; Memon, Saba Samad; Bandgar, Tushar · Case Report

RPEP-12939 · 2025

Nanoparticle Gel System Delivers Liraglutide Directly to Gums for Diabetic Gum Disease

PLGA/HA nanoparticles loaded with liraglutide provided sustained local release that reduced diabetic periodontitis severity by inhibiting necroptosis in periodontal tissues, addressing both glycemic control and local tissue destruction.

Pang, Yunqing; Kong, Lingyuan; Li, Yuanyuan; Li, Jiamin; Ma, Qianlong; Qiu, Jing; Wang, Jing · Animal Study

RPEP-12940 · 2025

Peptide-loaded hydrogel combines anti-inflammatory and bone-building effects to heal bone defects

The triple-component hydrogel (RGD@DEXMA/DOPA-P24/Mn3O4) synergistically reduced ROS-driven inflammation, promoted M1-to-M2 macrophage polarization and angiogenesis, and enhanced osteogenic differentiation of bone marrow stem cells, accelerating bone defect regeneration in vivo.

Pang, Yuxuan; Wang, Xin; Zhang, Huan; Li, Xin; Lin, Min; Cheng, Liang; Yang, Ying-Wei · Animal Study

RPEP-12941 · 2025

Neuropeptide αCGRP plays a key role in how exercise affects osteoarthritis progression in joints and bone

αCGRP deficiency did not change overall cartilage degradation scores but prevented cartilage extracellular matrix stiffening, altered subchondral bone remodeling, caused trabecular bone loss with intense exercise, and elevated proinflammatory serum markers—establishing αCGRP as a key mediator of joint and bone responses to mechanical stress during OA.

Pann, Patrick; Kalke, Paul; Maier, Verena; Schäfer, Nicole; Clausen-Schaumann, Hauke; Schilling, Arndt F; Grässel, Susanne · Animal Study

RPEP-12942 · 2025

Natriuretic peptides are more than heart failure biomarkers—they regulate immune, metabolic, and cardiovascular systems

Natriuretic peptides act as multisystem regulators with natriuretic, vasodilatory, antifibrotic, and immunomodulatory effects via cGMP-PKG signaling, but their therapeutic potential is limited by NP resistance mechanisms including neprilysin degradation, NPR-C clearance, and receptor desensitization in advanced disease.

Panneflek, Jathniel; Barbarawi, Mahmoud; Kakarlapudi, Yasitha; Barbarawi, Zaid; Lauzea, Béatrice; Meraz-Torres, Manolo · Narrative Review

RPEP-12943 · 2025

Platelets have renin-angiotensin system receptors but angiotensin peptides do not affect platelet function

Healthy human platelets express RAS receptors (Mas, MrgD, ACE, ACE2, AT1, AT2) but angiotensin peptides (Ang-I, Ang-II, Ang-(1-7), Ang-(1-9), alamandine) had no effect on platelet adhesion or aggregation at any concentration tested. ACE activity was present but captopril-resistant; ACE2 was undetectable.

Panosetti, François; Cuenot, François M; Saint Auguste, Damian S; Martins Cavaco, Ana C; Nunes, Allancer D C; Lu, Philip H J; Magrini, Céline; Molot, Max; Sanglard, Gabriel; Günçü, Rodi; Zouaghi, Yassine; Béguelin, Charles; Martins Lima, Augusto; Stergiopulos, Nikolaos · In Vitro

RPEP-12944 · 2025

GLP-1 drugs may protect against cell death pathways that drive diabetic kidney and liver disease

GLP-1RAs reduced ferroptosis markers (decreased ACSL4, increased protective factors) comparably to ferrostatin-1 and suppressed pyroptosis markers (caspase-1, GSDMD, IL-1β, NLRP3) in experimental models of diabetic kidney disease and metabolic liver disease, with additional anti-inflammatory, anti-fibrotic, and antioxidant effects.

Panou, Theodoros; Gouveri, Evanthia; Rizzo, Manfredi; Popovic, Djordje S; Papanas, Nikolaos · Narrative Review

RPEP-12946 · 2025

GLP-1 weight loss drugs may cause muscle loss—but the picture is more complex than it seems

Clinical studies show GLP-1RAs and dual GLP-1/GIP agonists can cause significant lean mass loss and sarcopenia risk, but preclinical evidence paradoxically shows these agents may attenuate skeletal muscle atrophy, improve muscle function, and enhance mitochondrial health at the cellular level.

Pantazopoulos, Dimitrios; Gouveri, Evanthia; Papazoglou, Dimitrios; Papanas, Nikolaos · Narrative Review

RPEP-12947 · 2025

Comparing GnRH agonists and antagonists for endometriosis: oral non-peptide drugs offer key advantages

Non-peptide GnRH antagonists combine the benefits of rapid onset (no flare-up effect), oral administration, and dose-dependent estrogen suppression, offering advantages over both GnRH agonists (delayed onset, injection required) and peptide antagonists (injection required) for endometriosis treatment.

Paoletti, Anna Maria; Neri, Manuela; Pilloni, Monica; Marotto, Maria Francesca; Giancane, Elena; Vallerino, Valerio; Piras, Bruno; Melis, Giulia; Melis, Virginia; Masciale, Michele Danilo Maria; Murgia, Enrica; Melis, Gian Benedetto · Narrative Review

RPEP-12948 · 2025

Animal models reveal distinct mechanisms behind fatty liver disease in lean people, with GLP-1 drugs showing therapeutic promise

Lean MASLD is mechanistically distinct from obesity-related MASLD, driven by bile acid dysregulation, leptin signaling abnormalities, and oxidative stress. Animal models testing GLP-1 analogues (exendin-4, liraglutide), kinsenoside, silibinin, and bile acid modulators show therapeutic promise for this patient population.

Papadakos, Stavros P; Georgiadou, Chara; Kassi, Eva; Velliou, Rallia-Iliana; Chatzigeorgiou, Antonios · Narrative Review

RPEP-12949 · 2025

Low albumin levels predict worse survival for neuroendocrine tumor patients receiving peptide-based radiation therapy

Hypoalbuminemia (HR 0.91 per unit) and elevated CRP (HR 1.02 per unit) independently predicted shorter overall survival in PRRT-treated NET patients. GPS score of 2 vs. 0 had HR 3.60. Albumin was the single most valuable addition to established prognostic models, while dNLR added no value.

Papantoniou, Dimitrios; Fröss-Baron, Katarzyna; Garske-Román, Ulrike; Sundin, Anders; Thiis-Evensen, Espen; Grönberg, Malin; Welin, Staffan; Tiensuu Janson, Eva · Retrospective Cohort

RPEP-12952 · 2025

Obesity and type 2 diabetes damage bone differently, linked to changes in antimicrobial peptide CRAMP

Hyperinsulinemic obesity decreased trabecular and cortical bone thickness with BMAT expansion but preserved CRAMP levels. Insulinopenic T2D decreased trabecular number, impaired bone stiffness, and reduced circulating CRAMP peptide levels, suggesting a link between insulin deficiency, bone quality, and innate immune peptide regulation.

Paquet, Amélie; Bahlouli, Nadia; Coutel, Xavier; Leterme, Damien; Delattre, Jérôme; Gauthier, Véronique; Miellot, Flore; Delplace, Séverine; Rouge-Labriet, Hélène; Bertheaume, Nicolas; Chauveau, Christophe; Benachour, Hamanou · Animal Study

RPEP-12953 · 2025

Neuropeptide CGRP drives gastrointestinal cancer growth through its receptor RAMP1, and tumors produce their own CGRP

RAMP1 expression was associated with reduced survival in CRC and GC. Over 50% of CRC and 60% of GC cells expressed RAMP1. Tumor cells themselves produced CGRP (not just nerves). CGRP stimulation enhanced tumor growth in a RAMP1-dependent manner, activating proliferation, metabolism, and migration pathways.

Parathan, Pavitha; Tran, Kelly; Neil, Liam; Tan, Tao; Carli, Annalisa L E; Liao, Yang; Mouradov, Dmitri; Da Gama Duarte, Jessica; Huber, Anne; Pal, Bhupinder; Gibbs, Peter; Sieber, Oliver M; Chiu, Isaac M; Kearney, Conor J; Shi, Wei; Mariadason, John M; Williams, David S; Buchert, Michael; Mielke, Lisa A · Observational

RPEP-12954 · 2025

Switching from dulaglutide to semaglutide provides additional blood sugar and weight reduction in real-world patients

After switching from dulaglutide to semaglutide, patients achieved additional HbA1c reductions of -0.43% (6 mo), -0.54% (12 mo), -0.38% (18 mo), and additional weight loss of -2.7 kg (6 mo), -3.7 kg (12 mo), -5.4 kg (18 mo), -4.2 kg (24 mo), with no significant increase in adverse effects.

Pardo Lozano, Felipe; Rubio Marcos, Arantxa; Casañ Fernández, Rosa; Bartual Rodrigo, Amparo; Martínez-Hervás, Sergio; Ampudia-Blasco, Francisco Javier · Observational

RPEP-12957 · 2025

Semaglutide boosts blood vessel repair stem cells while reducing inflammatory cells in high-risk patients

Semaglutide increased VR cells +34.8% (vs +0.8% usual care, p=0.036), endothelial precursors +66.2% (vs -2.3%, p=0.037), and reduced granulocyte precursors -50.8% (vs +0.3%, p=0.002). Pro-inflammatory TNF and interleukin serum proteins were also downregulated.

Park, Brady; Dennis, Fallon; He, Arianna Z; Krishnaraj, Aishwarya; Bakbak, Ehab; Dennis, Cole J; Pan, Yi; Misner, Elizabeth; Thayanithy, Veena; Lambotharan, Bhavaani; Lambotharan, Vaasudevan; Lambotharan, Aruna; Mazer, C David; Quan, Adrian; Teoh, Hwee; Hess, David A; Verma, Subodh · Randomized Controlled Trial

RPEP-12958 · 2025

Marsupial cathelicidin peptides provide potent immune defense and protect against sepsis in mouse models

Sugar glider cathelicidins reside in two genomic clusters, are highly expressed in neonatal neutrophils, have potent antibacterial activity, modulate immune responses, and provide sufficient protection against sepsis in a mouse model. Marsupials and monotremes uniquely retain both genomic clusters among tetrapods.

Park, Jongbeom; Ke, Wenfan; Kaage, Aellah; Feigin, Charles Y; Griffing, Aaron H; Pritykin, Yuri; Donia, Mohamed S; Mallarino, Ricardo · Animal Study

RPEP-12959 · 2025

Pine-derived peptide PN5 kills drug-resistant Salmonella and boosts immune response in mice

PN5 demonstrated dual-function activity: direct bactericidal membrane disruption against MDR S. Typhimurium plus immune modulation via NF-κB and MAPK pathways. It eliminated intracellular bacteria in macrophages, inhibited biofilm formation, and significantly improved survival in a murine infection model.

Park, Jonggwan; Kang, Da Dam; Kim, Hyeongsun; Oh, Jun Hee; Park, Yoonkyung · Animal Study

RPEP-12961 · 2025

Antimicrobial peptide cathelicidin promotes skin cancer growth through a sphingosine-1-phosphate feedback loop

CAMP is overexpressed in cSCC and promotes tumor growth via FPRL1 receptor. S1P signaling drives CAMP production; inhibiting S1P reduces CAMP-stimulated cSCC growth. CAMP increases FOXP3+ regulatory T cells (suppressing anti-tumor immunity) and induces ER stress, creating a vicious S1P-CAMP feedback loop that favors cSCC development.

Park, Kyungho; Shin, Kyong-Oh; Kim, Young-Il; Nielsen-Scott, Anna L; Mainzer, Carine; Celli, Anna; Bae, Yoojin; Chae, Seungwoo; An, Hahyun; Choi, Yerim; Park, Jae-Ho; Park, Soo-Hyun; Hwang, Jin-Taek; Kang, Seung Goo; Wakefield, Joan S; Arron, Sarah T; Holleran, Walter M; Mauro, Theodora M; Elias, Peter M; Uchida, Yoshikazu · In Vitro

RPEP-12976 · 2025

Corin and Furin: Two Enzymes That Could Change How We Diagnose Heart Failure

Corin and furin show altered expression across different heart failure phenotypes, offering mechanistic insight into disease progression, though their diagnostic performance remains modest compared to BNP and NT-proBNP.

Patel, Dhruvil Vinaybhai; Patel, Sanket; Acharya, Sankalp; Raol, Karanrajsinh · Narrative Review

RPEP-12977 · 2025

Self-assembling peptide gel delivers antibiotics through the eardrum for non-invasive ear infection treatment

The peptide amphiphile hydrogel successfully transitioned from 1D nanofiber networks to 0D micelles, functioning as cell-penetrating peptides while providing temporal control of ciprofloxacin release over 48 hours. The formulation was non-cytotoxic to epidermal keratinocytes.

Patel, Evan A; Shah, Swapnil V; Poulson, Trevor A; Fry, H Christopher; Jagasia, Ashok A · In Vitro

RPEP-12978 · 2025

Comparing semaglutide, liraglutide, orlistat, and phentermine for obesity: a systematic review

All four agents provide weight loss benefits through distinct mechanisms. GLP-1 agonists (semaglutide, liraglutide) show superior efficacy but cause GI side effects. Orlistat reduces fat absorption with GI discomfort. Phentermine suppresses appetite but has dependency potential. Emerging dual/triple agonists show promise.

Patel, Jay P; Hardaswani, Daksh; Patel, Jaykumar; Saiyed, Faizanali; Goswami, Rushita J; Saiyed, Taskin I; Patel, Harshkumar; Amin, Trishul H · Systematic Review

RPEP-12980 · 2025

GLP-1 drugs show promise for heart failure with preserved ejection fraction in obese patients

In STEP-HFpEF and SUMMIT trials, semaglutide and tirzepatide achieved 13.3% and 13.9% weight reduction, 21.5m and 26m improvements in 6MWD, 19.5 and 16.6 point KCCQ-CSS improvements, and 38.8% and 43.5% CRP reductions in obese HFpEF patients.

Patel, Ravi; Kokori, Emmanuel; Olatunji, Gbolahan; Adejumo, Faith Adedayo; Ukah, Joan Dumebi; Babalola, Adetola Emmanuel; Ndakotsu, Andrew; Abraham, Israel Charles; Aderinto, Nicholas · Narrative Review

RPEP-12983 · 2025

GLP-1 drugs expanding beyond diabetes into neurology, dermatology, addiction, and autoimmune disease

GLP-1 RAs achieve HbA1c reductions of 1.5-2.0%, weight loss of 7-24%, and 14-20% MACE reduction. Pleiotropic mechanisms include mitochondrial function enhancement, anti-inflammatory effects, and cellular quality control improvement. Emerging applications span neurology, dermatology, respiratory, addiction, and autoimmune fields.

Patel, Shikha; Niazi, Sarfaraz K · Systematic Review

RPEP-12984 · 2025

Mediterranean diet enhances tirzepatide benefits for visceral fat and insulin resistance beyond weight loss alone

After 3 months of tirzepatide, significant reductions in weight, BMI, WC, WtHR, BRI, and VAI (all p<0.05). PREDIMED scores increased +3.2 points (p<0.001). Higher Mediterranean diet adherence independently associated with lower insulin, improved HOMA, and greater VAI reduction.

Paternò, Valentina; Geraci, Giulio; Piticchio, Tommaso; Le Moli, Rosario; Burgio, Stefano; Costanzo, Gabriele; Sambataro, Gianluca; Baratta, Roberto; Barbagallo, Federica; Pallotti, Francesco · Observational

RPEP-12985 · 2025

Stapled peptides offer a new approach to fighting brain-targeting viral infections

Peptide stapling via hydrocarbon staples, lactam bridges, and metal-coordination bonds enhances peptide stability, bioavailability, cellular penetration, and target binding affinity for antiviral applications against neurotropic viruses including HSV and influenza.

Patil, Sanskruti; Rahangdale, Rakesh; Pasupuleti, Mukesh; Santhoshkumar, Puttur; Hariharapura, Raghu Chandrashekar · Narrative Review

RPEP-12986 · 2025

GLP-1 drug exenatide prevents olanzapine-related weight gain in psychiatric patients

Exenatide vs placebo over 16 weeks: -0.5 kg (-0.6%) vs +2.6 kg (+2.8%), both p<0.01. Exenatide was well-tolerated. No clinically meaningful differences in mood or psychotic symptoms between groups.

Patino, Luis R; Strawn, Jeffrey R; Adler, Caleb M; Blom, Thomas J; Welge, Jeffrey A; DelBello, Melissa P · Randomized Controlled Trial

RPEP-12987 · 2025

Targeted Radiation Therapy Resolves Dangerous Low Blood Sugar in 93% of Malignant Insulinoma Patients

PRRT with Lu-177 DOTATATE resolved hypoglycemia in 93% of patients (14/15) after a median of 2.5 months, with median overall survival of 50.1 months and successful re-treatment in all recurrence cases.

Pattison, David A; Kong, Grace; Akhurst, Timothy; Burge, Matthew; Chiang, Cherie; Hofman, Michael S; Hung, Te-Jui; Love, Amanda; Michael, Michael; Okano, Satomi; Ravi Kumar, Aravind S; Sachithanandan, Nirupa; Wyld, David; Hicks, Rodney J · Retrospective Cohort

RPEP-12991 · 2025

Why Combining Blood Pressure Drugs That Target the Same System May Not Work Better

Lisinopril produced the strongest antihypertensive effect; dual RAS blockade created complex angiotensin peptide profile changes but only modest additional blood pressure reduction in this low-RAS model.

Paulis, L; Rajkovicova, R; Repova, K; Gubo, G; Barta, A; Poglitsch, M; Domenig, O; Andelova, N; Ferko, M; Pechanova, O; Simko, F · Animal Study

RPEP-12994 · 2025

How Excess Fructose Rewires Hunger Neurons in the Brain to Promote Overeating

High-fructose diets induced synaptic and neuronal adaptations at hypothalamic NPY/AgRP neurons, promoting hyperphagia and fat gain with sex-dependent metabolic effects.

Payant, Mikayla A; Sankhe, Aditi S; Miller, Persephone A; Vieira, Sarah S; Dumiaty, Yasmina; Phy-Lim, Jenny; Levy, Zachary L; Chee, Melissa J · Animal Study

RPEP-12995 · 2025

Protein RAMP3 Changes How GLP-1 Receptors Work, Potentially Reducing Side Effects

RAMP3 interacts with the GLP-1 receptor, biasing signaling toward Ca2+ mobilization (away from cAMP), which enhanced glucose-stimulated insulin secretion in pancreatic cells.

Pearce, Abigail; Kumari, Poonam; Sisk, Claudia M; Harris, Matthew; Yeung, Ho Yan; Winfield, Sabrina; Caron, Kathleen M; Ladds, Graham · In Vitro