Gemcitabine CAS 95058-81-4

Shaanxi BLOOM Tech Co., Ltd. yog ib qho ntawm cov tuam ntxhab thiab cov muag khoom ntawm gemcitabine cas 95058-81-4 hauv Suav teb. Txais tos rau cov lag luam wholesale bulk zoo gemcitabine cas 95058-81-4 muag ntawm no los ntawm peb lub hoobkas. Kev pabcuam zoo thiab tus nqi tsim nyog muaj.

Gemcitabine CAS 95058-81-4, tseem hu ua difluorodeoxycytidine, yog pyrimidine nucleoside analog thiab siv dav siv tshuaj antineoplastic. Nws cov tshuaj formula yog C₉H₁₁F₂N₃O₄, thiab raws li ib tug tswv cuab ntawm tsev neeg cytarabine, nws exerts nws antitumor los ntawm ib tug zoo-tus yam ntxwv intracellular activation thiab metabolic txoj kev. Hauv lub cev, gemcitabine yog pib phosphorylated thiab qhib los ntawm deoxycytidine kinase, thaum nws inactivation thiab clearance feem ntau yog kho los ntawm cytidine deaminase. Lub luag haujlwm tseem ceeb ntawm kev ua haujlwm suav nrog nws cov metabolites nquag tau muab tso rau hauv kev hloov pauv DNA strands, feem ntau tsom cov hlwb hauv G1 / S theem ntawm lub voj voog ntawm tes thiab ua rau cov saw hlau txiav thiab DNA puas. Tshwj xeeb tshaj yog, gemcitabine nthuav tawm qhov tshwj xeeb tus kheej muaj peev xwm ua rau nws txawv ntawm cytarabine: ntxiv rau kev koom ua ke ntawm DNA ncaj qha, nws tseem inhibits ribonucleotide reductase, uas txo cov qib intracellular ntawm deoxynucleotide triphosphates thiab ntxiv rau nws tus kheej kev koom ua ke rau hauv DNA. Nws kuj inhibits cytidine deaminase, yog li txo cov metabolic degradation ntawm nws active intracellular metabolites thiab prolonging lawv cytotoxic kev ua. Qhov kev ua ob yam inhibitory no txhim kho nws tag nrho cov tshuaj tiv thaiv kab mob thiab pab txhawb rau nws txoj kev kho mob dav dav hauv ntau cov qog nqaij hlav thiab hematologic malignancies.

► Cellular Uptake

Gemcitabine nkag mus rau neoplasm hlwb feem ntau los ntawm nucleoside transporters nyob rau ntawm lub cell membrane. Ob hom kev thauj khoom tseem ceeb koom nrog yog tib neeg sib npaug ntawm nucleoside transporter 1 (hENT1) thiab tib neeg concentrative nucleoside transporter 1 (hCNT1). Cov theem qhia ntawm cov neeg thauj khoom no tuaj yeem sib txawv ntawm ntau hom neoplasm thiab cov qog nqaij hlav ntawm tus kheej, uas tuaj yeem cuam tshuam qhov rhiab heev ntawm neoplasm hlwb rau gemcitabine. Ib zaug hauv lub cell, gemcitabine yog npaj rau kev ua kom metabolic ntxiv.

► Phosphorylation Cascade

Thawj Phosphorylation Kauj Ruam: Thawj phosphorylation ntawm gemcitabine rau gemcitabine monophosphate (dFdCMP) yog catalyzed los ntawm deoxycytidine kinase (dCK). dCK yog ib qho enzyme tseem ceeb hauv kev ua kom gemcitabine, thiab nws cov haujlwm tuaj yeem tswj hwm los ntawm ntau yam, suav nrog kev muaj cov substrates thiab muaj cov inhibitors.

Tom qab Phosphorylation: dFdCMP tom qab ntawd ntxiv phosphorylated rau gemcitabine diphosphate (dFdCDP) los ntawm nucleoside monophosphate kinases thiab tom qab ntawd mus rau active triphosphate daim ntawv, gemcitabine triphosphate (dFdCTP), los ntawm nucleokinside diphosphate. dFdCTP yog cov tshuaj lom neeg muaj zog tshaj plaws thiab yog lub luag haujlwm rau feem ntau ntawm gemcitabine cov teebmeem cytotoxic.

► DNA - Lwm yam Mechanisms

Masked Chain Termination: dFdCTP tuaj yeem muab tso rau hauv DNA thaum lub sij hawm DNA replication los ntawm DNA polymerases. Thaum muab tso ua ke, ib qho nucleotide ntxiv tuaj yeem ntxiv rau DNA strand. Txawm li cas los xij, muaj ob lub fluorine atoms ntawm lub nplhaib deoxyribose ntawm gemcitabine ua rau muaj kev hloov pauv hauv DNA qauv. Qhov kev hloov pauv no ua rau nws nyuaj rau DNA polymerase txuas ntxiv ntxiv nucleotides, cuam tshuam DNA synthesis. Cov khoom siv gemcitabine yog "masked" hauv DNA, tiv thaiv nws los ntawm kev txiav tawm tam sim ntawd los ntawm DNA kho enzymes, uas tso cai rau cov nyhuv cytotoxic mus tas li.

Inhibition ntawm Ribonucleotide Reductase: dFdCDP kuj tseem ua lub luag haujlwm tseem ceeb hauv gemcitabine cov txheej txheem ntawm kev ua. Nws inhibits ribonucleotide reductase, ib qho enzyme uas hloov ribonucleotides rau deoxyribonucleotides. Deoxyribonucleotides yog qhov tseem ceeb hauv tsev thaiv rau DNA synthesis. Los ntawm inhibiting ribonucleotide reductase, dFdCDP txo cov pas dej ua ke ntawm deoxyribonucleotides, ntxiv kev txwv DNA synthesis hauv neoplasm hlwb. Qhov kev ua haujlwm ob npaug no, tsom mus rau DNA synthesis ncaj qha thiab cov khoom siv ntawm deoxyribonucleotides, ua rau gemcitabine muaj txiaj ntsig zoo los tiv thaiv - neoplasm tshuaj.

Clinically, gemcitabine qhia txog qhov sib txawv antitumor spectrum los ntawm cytarabine, ua kom pom kev ua tau zoo tiv thaiv ntau yam qog nqaij hlav. Nws yog siv raws li kev txhaj tshuaj intravenously thiab siv los ua tshuaj tiv thaiv kab mob metabolic. Kev pom zoo qhia suav nrog nws siv hauv kev kho mob neoplasm, tshwj xeeb tshaj yog rau cov tsis yog -mob ntsws neoplasm, pancreatic neoplasm, mis neoplasm, thiab zais zis neoplasm, thiab lwm yam. Nws inhibits DNA synthesis thiab kho, thaum kawg ua rau autophagy thiab apoptosis ntawm cov qog nqaij hlav cancer.

1. Cov lus qhia

Nws yog qhia rau kev kho mob ntawm ntau hom neoplasm, suav nrog tab sis tsis txwv rau:

• Pancreatic neoplasm: Feem ntau siv los ua thawj- kab lossis thib ob- kab kev kho mob rau kev mob qog noj ntshav siab lossis mob qog noj ntshav, ib leeg lossis ua ke nrog lwm cov tshuaj kws khomob.
• Tsis yog -Small Cell Lung neoplasm (NSCLC): Nws yog ib qho kev kho mob zoo rau hauv zos qib siab lossis metastatic NSCLC, xws li kev kho mob monotherapy lossis hauv kev sib xyaw ua ke.
• Lub mis neoplasm: Ua ke nrog lwm cov tshuaj xws li paclitaxel, yog siv los kho mob qog noj ntshav lossis mob qog noj ntshav.
• Bladder neoplasm: Nws tau pom zoo siv rau hauv qee qhov chaw mob qog noj ntshav zais zis, muab lwm txoj kev kho mob rau cov neeg mob.
• Lwm cov qog nqaij hlav: Kuj pom tias muaj txiaj ntsig hauv kev kho mob ntawm zes qe menyuam neoplasm, ncauj tsev menyuam neoplasm, thiab prostate neoplasm, thiab lwm yam, txawm hais tias nws siv hauv cov lus qhia no yuav raug txwv lossis tshawb xyuas.

2. Kev Kho Mob Ua Ke

Nws yog feem ntau siv ua ke nrog lwm cov tshuaj chemotherapeutic los txhim kho kev ua tau zoo thiab tswj cov kev mob tshwm sim. Qee qhov kev sib xyaw ua ke muaj xws li:

• + Cisplatin: Siv los kho NSCLC, pancreatic neoplasm, thiab lwm yam qog nqaij hlav.
• + Paclitaxel: Kev sib xyaw ua ke nrov rau metastatic mis neoplasm.
• + Carboplatin: Lwm txoj hauv kev rau NSCLC thiab lwm yam neoplasm.
• + Fluorouracil (5-FU): Siv rau hauv qee yam kab mob pancreatic neoplasm thiab lub raum neoplasm kev kho mob.

3. Kev noj tshuaj thiab kev tswj hwm

Nws yog muab tso rau hauv cov hlab ntsha, nrog rau cov koob tshuaj tshwj xeeb thiab kev tswj xyuas raws li tus neeg mob tus mob thiab cov phiaj xwm kev kho mob. Cov sij hawm noj tshuaj muaj xws li kev tswj hwm txhua lub lim tiam rau 3 lub lis piam sib law liag ua raws li ib lub lim tiam so, lossis kev tswj hwm ob lub lis piam nyob ntawm kev sib xyaw ua ke thiab kev ua siab ntev ntawm tus neeg mob.

4. Mechanism of Action

Cov txheej txheem ntawm kev ua cuam tshuam nrog nws kev koom ua ke rau hauv DNA, feem ntau thaum lub sij hawm S-theem ntawm lub voj voog ntawm tes, ua rau inhibition ntawm DNA synthesis thiab kho. Tsis tas li ntawd, nws inhibits ribonucleotide reductase, uas ua rau txo qis ntawm deoxynucleotide triphosphates (dNTPs) nyob rau hauv lub cell, ntxiv impairing DNA synthesis. Cov teebmeem no thaum kawg ua rau kev tuag ntawm tes los ntawm apoptosis thiab autophagy.

5. Kev phiv thiab kev ceev faj

Txawm hais tias nws yog ib qho tshuaj tiv thaiv kab mob zoo, nws muaj feem cuam tshuam nrog ntau yam kev mob tshwm sim uas cov neeg mob thiab cov kws kho mob yuav tsum paub txog. Cov no suav nrog tab sis tsis txwv rau:

Kev Tiv Thaiv Pob Txha: tuaj yeem ua rau ntshav ntshav, neutropenia, thiab thrombocytopenia, yuav tsum tau saib xyuas cov ntshav tsis tu ncua.

Mob plab hnyuv: xeev siab, ntuav, thiab raws plab yog tshwm sim, feem ntau tswj tau nrog kev saib xyuas.

Hepatic and Renal Impairment: Cov neeg mob uas muaj ua ntej - lub siab uas twb muaj lawm los yog lub raum tsis ua hauj lwm yuav tsum tau hloov koob tshuaj.

Neurotoxicity: Peripheral neuropathy thiab qaug zog tuaj yeem tshwm sim, cuam tshuam rau cov neeg mob lub neej zoo.

Pulmonary Toxicity: Tsis tshua muaj, cov neeg mob yuav muaj kev ua pa nyuaj lossis mob ua pa nyuaj.

Txhawm rau txo cov kev mob tshwm sim no thiab ua kom muaj kev nyab xeeb thiab muaj txiaj ntsig zoo, cov neeg mob yuav tsum tau saib xyuas zoo thaum lub sijhawm kho, thiab kev hloov tshuaj lossis kev cuam tshuam kev kho mob yuav tsim nyog raws li tus neeg mob kam rau ua thiab teb.

Hauv kev xaus, gemcitabine yog ib qho tseem ceeb ntxiv rau oncologist's toolbox, muab kev kho mob muaj zog thiab ntau yam kev xaiv rau ntau hom qog nqaij hlav. Nws daim ntawv thov kev kho mob txuas ntxiv mus ntxiv raws li cov kws tshawb fawb tshawb nrhiav cov kev kho mob sib xyaw ua ke tshiab thiab cov lus qhia, ntxiv nthuav nws lub luag haujlwm hauv kev saib xyuas neoplasm.

• Cov Tuam Txhab Tshuaj: Eli Lilly thiab Tuam Txhab tseem yog thawj tus tsim thiab tsim khoom, tab sis kev sib koom tes thiab kev koom tes nrog lwm cov tuam txhab tshuaj kuj tau pab txhawb rau nws txoj kev loj hlob thiab kev lag luam.
• Cov Tsev Kawm Ntawv Kev Kawm: Cov tsev kawm tshawb fawb thiab cov tsev kawm qib siab kuj tau ua lub luag haujlwm txhawb kev nkag siab ntawm nws cov txheej txheem ntawm kev ua thiab tsim cov tswv yim kho tshiab siv cov tshuaj no.
  

   

   

  Gemcitabine tau ruaj khov nws tus kheej ua tus tseem ceeb hauv kev kho mob neoplasm, nrog rau ntau yam kev siv tshuaj kho mob hauv kev kho mob ntawm ntau yam qog nqaij hlav. Nws cov txheej txheem tshwj xeeb ntawm kev nqis tes ua, kev tswj hwm sab - cov txiaj ntsig profile, thiab muaj peev xwm ua ke nrog lwm cov kev kho mob ua rau nws yog ib qho tshuaj muaj txiaj ntsig hauv oncologist's arsenal. Kev tshawb fawb tsis tu ncua hauv kev sib xyaw ua ke, kev xa tshuaj, thiab kev txheeb xyuas biomarker tuav cov lus cog tseg zoo rau kev txhim kho cov txiaj ntsig ntawm gemcitabine thiab txhim kho lub neej zoo thiab muaj sia nyob ntawm cov neeg mob neoplasm.

   

Raws li peb txoj kev nkag siab ntawm neoplasm biology thiab pharmacology txuas ntxiv mus, gemcitabine yuav nyob twj ywm ib qho tseem ceeb ntawm kev kho neoplasm rau lub neej yav tom ntej. Nws txoj kev ua tau zoo thiab kev kam rau siab tau ua rau nws muaj txiaj ntsig ntxiv rau tus kws kho mob oncologist's armamentarium, thiab kev tshawb fawb txuas ntxiv mus tshawb nrhiav txoj hauv kev tshiab los txhim kho nws txoj kev siv hauv kev kho neoplasm.

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