T12278C

# **General Information**

| **Position** | **12278** | **Variant** | **m.12278T\>C** | **Locus** | **MT\-TL2** | **RNA** | **tRNA Leu (CUN)** |
| --- | --- | --- | --- | --- | --- | --- | --- |
| **Homoplasmy** | \- | **Heteroplasmy** | \+ | **mitoTIP** | 86\.40% | **Pathogenicity** | Reported |

"Pathogenicity" status is derived from published literature or predictions from bioinformatics tools. Researchers and clinicians are cautioned that additional data and/or analysis may still be necessary to confirm the pathological significance of these variants. For more information, please see [Mitofam Info](https://mitofam.com/doc/385/).

# **Pedigree Information**

The **m.12278T\>C** variant in MT\-TL2 has been reported in 1 pedigree. To date, 2 carriers have been reported. Reported mutation loads ranged from 1\.7% to 9%, with a median of 5\.3% overall; affected carriers showed mutation loads from 1\.7% to 9%, with a median of 5\.3%. The main clinical manifestations among affected carriers included diabetes mellitus.

| **No.** | **Position** | **Variant** | **Family ID** | **Nationality** | **Diseases** | **Unaffected Maternal Relatives** | **Affected Maternal Relatives** | **Publication Year** | **PMID/Ref** | **Note** |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | 12278 | m.12278T\>C | T12278C\-F1 | Poland | Diabetes mellitus | ND | ND | 2019 | [https://repozytorium.uw.edu.pl/server/api/core/bitstreams/b2a9e61e\-1b99\-447e\-8633\-e2b33b285b06/content](https://repozytorium.uw.edu.pl/server/api/core/bitstreams/b2a9e61e-1b99-447e-8633-e2b33b285b06/content) |  |

# **Carrier Information**

| **No.** | **Position** | **Variant** | **Family ID** | **Carrier ID** | **Type (Fam/De novo/Uninf)** | **Gender (F/M)** | **Proband (Y/N)** | **Affected (Y/N)** | **Die/Alive(D/A)** | **Age** | **Blood Mutant Level** | **Muscle Mutant level** | **Urine Mutant level** | **Other Mutant level** | **Clinical Features** | **Note** |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | 12278 | m.12278T\>C | T12278C\-F1 | T12278C\-F1\-P1 | Uninf | ND | Y | Y | A | ND | 9% | / | / | / | Diabetes mellitus |  |
| 2 | 12278 | m.12278T\>C | T12278C\-F2 | T12278C\-F2\-P1 | Uninf | ND | Y | Y | ND | ND | 1\.7% | / | / | / | Diabetes mellitus |  |

For abbreviations and other usage instructions, please see [Mitofam Info](https://mitofam.com/doc/385/).