Jul 02,2025

靶向HGF的人源化中和抗體的臨床前開發，本研究中PK/TK及ADA通過尊龍凱時進行

Hepatocyte growth factor (HGF) and its receptor, cMET, play critical roles in cell proliferation, angiogenesis and invasion in a wide variety of cancers. YYB-101 inhibited cMET activation in vitro and suppressed tumor growth in the orthotopic mouse model of human glioblastoma. The in vitro and in vivo data demonstrated the anti-tumor efficacy of YYB-101, which appeared to be mediated by blocking the HGF/cMET interaction. The preclinical pharmacokinetics, toxicokinetics and tissue cross-reactivity data support the clinical development of YYB-101 for advanced cancer. Pharmacokinetics, toxicokinetics and anti-drug antibodies of YYB-101 in cynomolgus monkeys were conducted by the Test and Control Article Department of Medicilon Preclinical Research, LLC, in accordance with regulations outlined in the USDA Animal Welfare act and conditions specified in The Guide for the Care and Use of Laboratory Animals.

Jul 02,2025

ASCT1/2抑制劑可用于治療精神分裂癥和視覺障礙，本研究中小鼠PK實驗通過尊龍凱時進行

The N-methyl-D-aspartate receptor coagonist D-serine is a substrate for the neutral amino acid transporters ASCT1 and ASCT2, which may regulate its extracellular levels in the central nervous system (CNS). Phenylglycine (PG) analogs that are inhibitors of ASCT1 and ASCT2. L-4-fluorophenylglycine (L-4FPG), L-4-hydroxyPG (L-4OHPG), and L-4-chloroPG (L-4ClPG) all showed high plasma bioavailability when administered systemically to rats and mice. L-4FPG showed good brain penetration with brain/plasma ratios of 0.7–1.4; however, values for L-4OHPG and L-4ClPG were lower. The ability of L-4FPG to penetrate the brain makes this compound a useful tool to further evaluate the function of ASCT1 and ASCT2 transporters in the CNS. Pharmacokinetic studies in rats and mice indicated high bioavailability by intraperitoneal or subcutaneous routes, with t1/2 values that allowed the evaluation of compound effects by a single acute administration in the animal models. Surprisingly, L-4FPG showed good blood-brain barrier penetration, with brain-to-plasma ratios ranging from 0.7 to 1.4 in the rat and from 0.7 to 0.9 in the mouse. L-4OHPG and L-4ClPG had lower values. Pharmacokinetic studies in mice for L-4FPG, L-4OHPG, and L-4ClPG were performed by Medicilon.

Jul 02,2025

MCL1抑制劑在多種實體瘤和血液腫瘤模型中顯示抗腫瘤效果，本研究中藥效實驗通過尊龍凱時進行

Induced myeloid leukemia cell differentiation protein (MCL1) is a crucial member of the B-cell lymphoma-2 (BCL2) family of apoptosis regulators, which play a critical role in promoting cancer survival and drug resistance. PRT1419 is a potent, MCL1 inhibitor with anti-tumor efficacy in various solid and hematologic malignancies. To validate the therapeutic feasibility of MCL1 inhibition in clear cell Renal Cell Carcinoma (ccRCC), researchers sought to investigate PRT1419 in a cell-line derived xenograft (CDX) model of PBRM1-mutant ccRCC. OS-RC-2 harbors a missense mutation in the PBRM1 bromodomain as a potential system to model PBRM1 loss in vivo. Importantly, OS-RC-2 lacks PBRM1 protein expression and can be transplanted into nude mice, generating tumors with histopathological features which closely resemble clinical ccRCC. For the OS-RC-2 model, 1 x 106 OS-RC-2 cells were injected into the right flank of 6–9-week-old female BALB/c nude mice. When the tumors were ~200 mm3, mice were randomized into two groups. Animals were either treated with vehicle or 20 mg/kg of PRT1419 administered intravenously, once weekly for three weeks. Researchers observed 42% Tumor Growth Inhibition (TGI) in response to PRT1419 treatment. PRT1419 dosing was well tolerated with no notable body weight loss or behavioral changes. Altogether these findings suggest PBRM1 loss in ccRCC is associated with MCL1 dependency and sensitivity to MCL1 inhibition. CDX studies were performed at Medicilon (OS-RC-2). All studies were performed in accordance with animal research guidelines from Medicilon.

Jun 12,2025

雙靶向HDAC抑制劑和ATM激活劑SP-1-303抑制雌激素受體陽性乳腺癌細胞生長，本研究中PK實驗通過尊龍凱時進行

Dual-targeting chromatin regulation and DNA damage repair signaling presents a promising avenue for cancer therapy. SP-1-303 acts as a class I isoform selective histone deacetylase (HDAC) inhibitor and an activator of the ataxia-telangiectasia mutated protein (ATM). SP-1-303 emerges as a novel second generation class I (HDAC1 and HDAC3) selective HDAC inhibitor, and ATM activator, capable of modulating estrogen receptor (ER) expression, and inhibiting growth of ER+ BC cells. Combined targeting of class I HDACs and ATM by SP-1-303 offers a promising therapeutic approach for treating ER+ breast cancers and supports further preclinical evaluation.

Jun 12,2025

抗逆轉錄病毒療法(ART)預防圍產期HIV感染，本研究中多替拉韋鈉鹽和游離態均由尊龍凱時提供

Vertical transmission accounts for most human immunodeficiency virus (HIV) infection in children, and treatments for newborns are needed to abrogate infection or limit disease progression. A hallmark of human immunodeficiency virus type 1 (HIV-1) infection is the early establishment of a persistent viral reservoir1. Daily antiretroviral therapy (ART), the current standard of care, can reduce plasma viral load (PVL) to undetectable levels, but treatment interruption results in viral rebound. Being small molecules, ART drugs rapidly diffuse to distal sites; for instance, DTG was detectable at therapeutically relevant concentrations in colorectal tissue within 1?h of a single oral dose in a Phase I trial.

Jun 12,2025

通過增強MTUS1穩定性抑制透明細胞腎細胞癌轉移，本研究中體外實驗重組蛋白通過尊龍凱時合成和純化

Clear cell renal cell carcinoma (ccRCC) is the most prevalent histological subtype of kidney cancer and is believed to mainly originate from proximal tubular epithelial cells of the nephron. MTUS1 was significantly downregulated in ccRCC tissues, especially in metastatic tissues. Knockdown of MTUS1 decreased microtubule stability, whereas increased microtubule dynamics by promoting the ratio of unphosphorylated KIF2CS192 adapting to high motility of metastatic cancer cells. MTUS1 is a potent microtubule-stabilizing protein19, so we assessed the impact of MTUS1 knockdown on microtubule dynamics. MTUS1 regulates microtubule dynamics via promoting KIF2CS192 phosphorylation by Aurora B. Western blot and immunohistochemistry further confirmed significantly lower expression of SORBS2 protein in metastatic tissues than that in primary tissues and normal tissues.

Jun 12,2025

新型5-HT3受體配體有望用于治療神經精神疾病和胃腸道疾病，本研究中藥理藥效學研究通過尊龍凱時進行

Droxytryptamine (5-HT; serotonin) 5-HT3 receptor is an excitatory ligandgated ion channel expressed in for example the brain and the gastrointestinal tract. CSTI-300 as a selective, high affinity 5-HT3 receptor partial agonist. CSTI-300 was examined alongside the selective 5-HT3 receptor antagonist alosetron (which is also currently marketed as a therapeutic for IBS-d). Sub-cutaneous application of 5-hydroxytryptophan (5-HTP; 10 mg/kg) markedly increased the rat’s sensitivity to abdominal contractions. CSTI-300 and Alosetron displayed similar efficacy in a rodent in vivo model of IBS-d, measured by a reduction in colonic sensitivity. The experiments (Rat colon distension model of IBS-d) were carried out by Medicilon. The protocol complied with and was approved by the Institutional Animal Care and Use Committee and Medicilon is accredited by the NIH Office of laboratory Animal Welfare (OLAW) and AAALAC. Experiments (dog behavioural and emesis model) were performed by Medicilon. The protocol for the dog behavioural and emesis model complied with and was approved by the Institutional Animal Care and Use Committee.

Jun 11,2025

丁烯酸內酯是一種很有前景的天然防污產品，本研究中純度>99%的丁烯酸內酯通過尊龍凱時合成

Butenolide is a promising antifouling natural product. Rosin-based antifouling paint with the incorporation of butenolide, a promising antifoulant, possesses the potential to deter the settlement of marine organisms on submerged surfaces. Butenolide with a purity >99% was synthesized by Medicilon, Inc. (Shanghai, China).

Jun 11,2025

第二代前列腺素受體拮抗劑，本研究中眼部PK實驗通過尊龍凱時進行

?Prostanoids are established mediators of inflammation, and the therapeutic efficacy of drugs that block their global biosynthesis in conditions such as rheumatoid arthritis is well-known. AGN 225660 blocks pro-inflammatory prostanoid receptors (DP1, EP1, EP4, FP, TP). AGN 225660 represents a second-generation compound with an “druggable” core structure. AGN 225660 exhibited good ocular bioavailability and was active in reducing ocular inflammation associated with phacoemulsification surgery, lipopolysaccharide (LPS), and arachidonic acid induced uveitis. Ocular Pharmacokinetic studies were performed at Medicilon.

Jun 11,2025

SIRT6變構激活劑在結直腸癌中發揮治療作用，本研究中PK實驗通過尊龍凱時進行

Colorectal cancer (CRC) is the leading cause of cancer death; however, targets with broad anti-CRC effects are limited. Sirtuin6 (SIRT6) is a conserved nicotinamide adenine dinucleotide (NAD+)-dependent deacetylase that is widely pathologically downregulated in CRC. MDL-811, an allosteric SIRT6 activator, enhances SIRT6 deacetylation. Pharmacokinetic studies were performed by Shanghai Medicilon Inc, China, following standard protocols.